Title of Invention	"SEAT SUPPORT STRUCTURE OF MOTORCYCLE"
Abstract	In a motorcycle in which a seat load which acts on a seat 16 is received by a cross plate 151 mounted on a rear portion of a vehicle body, a raised portion 162 is formed by raising the cross plate 151 behind a center inclined portion 161 which constitutes a first load receiver which is mounted on the cross plate 151, and a rear seat load receiver 162a which constitutes a second load receiver is mounted on the raised portion 162, wherein the seat load attributed to a pillion which sits on a rear portion of the seat 16 is supported on the rear seat load receiver 162a.

Title of Invention

"SEAT SUPPORT STRUCTURE OF MOTORCYCLE"

Abstract

In a motorcycle in which a seat load which acts on a seat 16 is received by a cross plate 151 mounted on a rear portion of a vehicle body, a raised portion 162 is formed by raising the cross plate 151 behind a center inclined portion 161 which constitutes a first load receiver which is mounted on the cross plate 151, and a rear seat load receiver 162a which constitutes a second load receiver is mounted on the raised portion 162, wherein the seat load attributed to a pillion which sits on a rear portion of the seat 16 is supported on the rear seat load receiver 162a.

Full Text	[Designation of Document] specification [Title of the Invention] SEAT SUPPORT STRUCTURE OF MOTORCYCLE [Technical Field] [0001] The present invention relates to an improvement of the seat support structure of a motorcycle. [Background Art] [0002] As the conventional seat support structure of a motorcycle, there has been known the seat support structure which receives a load which acts on a seat by supporting a mounting member formed on a lower portion of the seat using support bolts mounted on a seat rail side (for example, see patent literature 1). [Patent Literature 1] Japanese Patent Laid-open 2002-284075 [0003] Fig. 3 and Fig. 5 of the patent literature 1 show the structure in which a mounting member 32 extends downwardly from a bottom plate 31 of a seat S at an approximately center portion thereof in the longitudinal direction, a support bolt 36 is mounted on a rail frame 16 of a seat rail 11 mounted on a rear portion of a vehicle body frame by way of a bracket 35, an elongated hole 33 is formed in a lower portion of the mounting member 32, and the support bolt 36 is inserted into the elongated hole 33, whereby a load which acts on the seat S is supported on the support bolt 36 by way of the mounting member. The seat S is vertically movable within a range of a gap between the elongated hole 33 and the support bolt 36. [Disclosure of the Invention] [0004] For example, the sinking of the seat S attributed to a rider who sits on a front portion of the seat S is restricted by the mounting member 32 and the support bolt 36. However, sinking of the seat S attributed to a pillion who sits on a rear portion of the seat S is not taken into consideration with respect to the above-mentioned motorcycle and hence, when the load which acts on the rear portion of the seat S is large, there may be a case in which the sinking of the rear portion of the seat S becomes excessively large. Accordingly, for example, when a gap between the seat S and a rear cowl which is arranged below the seat S is largely set by taking such a large sinking into consideration, the gap becomes conspicuous thus worsening the appearance. It is an object of the present invention to restrict the sinking of a rear portion of a seat by improving the seat support structure of a motorcycle. [Means for Solving the Problem] [0005] The invention according to claim 1 is characterized in that, in a motorcycle in which a seat load which acts on a seat is received by a cross member mounted on a rear portion of a vehicle body, a raised portion is formed by raising the cross member behind a first load receiver which is mounted on the cross member, and a second load receiver is mounted on the raised portion. [0006] The load which acts on the seat is supported by the first load receiver which is mounted on the cross member and the second load receiver of the raised portion which is formed by raising the cross member behind the first load receiver. Particularly, the second load receiver supports the seat load attributed to the pillion who rides on the rear portion of the seat and can suppress the sinking of the rear portion of the seat. [0007] The invention according to claim 2 is characterized in that an inserting portion is formed on a lower portion of the seat in a projecting manner, an engaging portion which is engaged with the inserting portion is mounted on the cross member, and the engaging member is configured such that a gate-shaped hook is mounted on the cross member and a rubber is arranged below the hook. [0008] When the inserting portion formed on the lower portion of the seat in a projecting manner is engaged with the engaging portion formed on the cross member, due to the provision of the rubber, there is no possibility that the inserting portion comes into direct contact with the cross member and, at the same time, a buffer effect can be achieved. [0009] The invention according to claim 3 is characterized in that a regulator is mounted on a back surface of the raised portion. The heat generated by the regulator is transferred to the raised portion and is irradiated from the regulator per se and the raised portion. [0010] The invention according to claim 4 is characterized in that grab rails are mounted on the cross member and third load receivers are mounted on the grab rails. By mounting the grab rails on both sides of the cross member, it is possible to increase a distance between the third load receivers which are provided on left and right sides of the grab rails and hence, the inclination of the seat in the lateral direction can be suppressed correspondingly. [Advantage of the Invention] [0011] According to the invention described in claim 1, since the second load receiver is formed on the raised portion which is formed behind the first load receiver, when the rider and the pillion sit on the seat, the load which acts on the seat can be received by the first load receiver and the second load receiver. Particularly, the sinking of the rear portion of the seat can be restricted by the second load receiver. Further, for example, it is unnecessary to form the large gap between the seat and the vehicle body cover by taking the sinking of the seat into consideration and hence, it is possible to enhance the appearance of the rear portion of the vehicle. [0012] According to the invention described in claim 2, the seat support structure includes the inserting portion which is formed on the lower portion of the seat in a projecting manner and the engaging portion which is engaged with the inserting portion, and the gate-shaped hook is mounted on the cross member and the rubber is arranged below the hook in the engaging portion and hence, there is no possibility that the inserting portion below the seat and the cross member directly come into contact with each other in the engaging portion whereby the riding feeling can be enhanced. [0013] According to the invention described in claim 3, since the regulator is mounted on the back surface of the raised portion, it is possible to accelerate the radiation of heat from the regulator by the raised portion whereby the performance of the regulator can be maintained. [0014] According to the invention described in claim 4, since the grab rails are mounted on the cross member and the third load receivers are mounted on the grab rails, it is possible to increase the lateral span of the third load receivers whereby the inclination of the seat in the lateral direction can be suppressed. [Best Mode for Carrying out the Invention] [0015] Hereinafter, the best mode for carrying out the present invention is explained in conjunction with attached drawings. [Brief Description of the Drawings] [0054] [Fig. 1] A side view of a motorcycle according to the present invention. [Fig. 2] A cross-sectional view of a rear portion of the motorcycle according to the present invention. [Fig. 3] A perspective view of the rear portion of the motorcycle according to the present invention. [Fig. 4] A cross-sectional view showing an assembled state of a rear portion of a vehicle body according to the present invention. [Fig. 5] A plan view of a cross plate according to the present invention. [Fig. 6] A transverse cross-sectional view of the rear portion of the vehicle body according to the present invention; [Fig. 7] An operational view showing an operation of the seat support structure according to the present invention. [Fig. 8] A cross-sectional view showing a rear portion of a rear fender of the motorcycle according to the present invention. Here, the drawings are viewed in the same direction as numerals . Fig. 1 is a side view of a motorcycle of the present invention. The motorcycle 10 is a vehicle which is characterized in that a handle stopper mechanism which regulates a steering angle of a bar handle 11 is improved, a protecting function of a handle lock device which locks steering of the bar handle 11 can be enhanced, the appearance of a periphery of the front cowl 12 is enhanced, a volume of a storing box 14 which is provided below a fuel tank 13 is increased and, at the same time, the appearance of the periphery of a storing box 14 is enhanced. The sinking of a seat which occurs when a pillion sits on a rear portion of the seat 16 is suppressed, and the degree of freedom in arranging a helmet holder 18 which is mounted on a rear portion side of the vehicle body frame 17 can be enhanced. [0016] The motorcycle 10 is a vehicle which has the following constitution. The vehicle body frame 17 is constituted of a head pipe 21 which forms a front end thereof, a main frame 22 which is extended obliquely in the rearward and downward directions from the head pipe 21, a pair of left and right seat rails 23, 24 (only symbol 23 on a reader's side being shown in the drawing) which are extended rearwardly from a rear end portion of the main frame 22, a pair of left and right down frames 26, 2 7 which are extended in the substantially downward and rearward directions from a front end portion of the main frame 22, a pair of left and right center frames 28, 31 (only symbol 28 on a reader's side being shown in the drawing)which are respectively connected with rear end portions of the down frames 26, 27 in a state that the center frames 28, 31 are extended obliquely in the downward and rearward directions from a rear portion of the main frame 22 and, thereafter, in the downward direction and a pair of left and right sub frames 32, 33 (only symbol 32 on a reader' s side being shown in the drawing) which are respectively extended between the seat rails 23, 24 and the center frames 28, 31. Further, a front fork 3 6 is rotatably mounted on the head pipe 21 and, a fuel tank 13 is mounted on the main frame 22. A power unit 43 which is constituted of an engine 41 and a transmission 42 is supported on a pair of left and right pivot plates 37, 38 (only symbol 37 on a reader's side being shown in the drawing) mounted on the center frames 28, 31, and, at the same time, a swing arm 45 is also supported on the pivot plates 37, 38 in a vertically swingable manner. The seat 16 and a rear side guard member 46 which is mounted on a rear left side of the seat 16 are supported on the seat rails 23, 24. [0017] The front fork 3 6 is formed by connecting a pair of left and right fork single bodies 51, 52 (only symbol 51 on a reader's side being shown in the drawing) using a top bridge 53 and a bottom bridge 54 which is arranged below the top bridge 53. The bar handle 11 and a handle lock device 56 are mounted on the top bridge 53. A cowl support stay 57 is mounted on the top bridge 53 and the bottom bridge54 so as to support the front cowl 12 by the cowl support stay 57 and, at the same time, the cowl support stay 57 also supports a meter 58, an inner cowl 61, a blinker support stay 62 and a front number plate 63. [0018] Here, numeral 65 indicates a head lamp which is mounted on the front cowl 12, numerals 66 and 67 (only symbol 66 on a reader's side being shown in the drawing) indicate a pair of left and right front blinkers which are mounted on left and right sides of the blinker support stay 62, numeral 68 indicates a front wheel which is mounted on a lower end of the front fork 36, and numeral 71 indicates a front fender which covers the front wheel 68 from above. [0019] A storing box 14 is positioned between the main frame 22 and a cylinder portion 73 of the engine 41 and is mounted on the lower portion of the main frame 22 by way of a bracket 74. The storing box 14 is constituted of a case 76 which has an opening and a lid (not shown in the drawing) which closes the opening. The fuel tank 13 has a lower side portion thereof covered with an extended portion 78 which is extended rearwardly from the case 76. Further, both side portions of the fuel tank 13 are covered with a left cover 81 and a right cover (not shown in the drawing). [0020] The seat 16 is a member which has an insertion portion which is mounted on a rear lower portion thereof engaged with engaging portions on the seat rail 23, 24 side and a pair of left and right mounting members 85, 86 (only symbol 85 on a reader's side being shown in the drawing) formed on a front lower portion fixed to the seat rail 23, 24 side using bolts. Here, numeral 87 indicates grab rails which are mounted on the rear portions of the seat rails 23, 24. [0021] A helmet holder 18 is mounted on an upper portion of a rear side guard member 46. The helmet holder 18 is a member which can be locked and is arranged in a state that the helmet holder 18 does not obstruct the movement of legs of a rider who rides on a rear portion of the seat 16. Here, numerals 91, 92 (only symbol 91 on a reader's side being shown in the drawing) indicate bar members which are extended obliquely in the rearward and downward directions from the sub frames 32, 33. Steps 93, 94 (only symbol 93 on a reader's side being shown in the drawing) for a pillion who rides on a rear portion of the seat 16 are respectively mounted on lower ends of the bar members 91, 92, and, at the same time, the bar members 91, 92 are connected to the lower portion of the rear sideward guard member 46 by way of a frame side stay 96. [0022] In the engine 41, an intake device 102 and an exhaust device 103 are mounted on a cylinder head 101 which is mounted on a cylinder portion 73. The in take device 102 includes a carburetor 106 which constitutes a fuel supply device which is connected to an upper portion of the cylinder head 101 by way of an intake tube 105 and an air cleaner 108 which is connected to the carburetor 106 by way of a connecting tube 107. The air cleaner 108 is arranged in a space where is surrounded by the seat rails 23, 24, the center frames 28, 31 and the sub frames 32, 33. Here, it is needless to say that the above-mentioned carburetor 106 may be formed of an injector or a throttle body of the fuel injection device. [0023] Here, numeral 111 indicates an intake opening of the air cleaner 108, numeral 112 indicates a throttle cable which is extended from a throttle grip (not shown in the drawing) mounted on the bar handle 11 to the carburetor 106, numeral 113 indicates a clutch cable which is extended from a clutch lever mounted on the bar handle 11 to the power unit 43, and numeral 114 indicates a battery which is arranged on a depth side of the air cleaner 108. [0024] The exhaust device 103 is constituted of an exhaust pipe 115 which is mounted on a lower portion of the cylinder head 101 and a muffler 116 which is mounted on a rear end of the exhaust pipe 115. In the exhaust device 103, the muffler 116 is supported by way of the depth side bar member 92 and a muffler stay 117 which is mounted on a distal end of the bar member 92. [0025] The swing arm 45 is a member which is mounted on the pivot plates 37, 38 by way of the pivot shaft 121. A rear wheel 122 and respective lower ends of a pair of left and right rear cushion units 123, 123 (only symbol 123 on a reader's side being shown in the drawing) are mounted on a rear end portion of the swing arm 45. Here, an upper end of the rear cushion unit 123 is mounted on rail lower brackets 125, 125 (only symbol 125 on a reader's side being shown in the drawing) which are respectively mounted on the seat rails 23, 24. Numeral 126 indicates a chain cover. The pivot plates 37, 38 are members which mount power unit support portions 131 to 133 for supporting an upper portion and a rear portion of the power unit 43 thereon. [0026] Here, numeral 137 indicates a stand, numeral 138 indicates a rear fender which is mounted on the seat rails 23, 24 and rail lower brackets 125, 125 so as to cover the rear wheel 122 from above, numerals 141, 142 (only symbol 141 on a reader's side being shown in the drawing) indicate a pair of left and right rear blinkers which are mounted on a blinker stay 143 mounted on the rear fender 138, numerals 144, 146 respectively indicate a rear cover and a tail lamp which are mounted on the rear fender 138. [0027] Fig. 2 is a cross-sectional view of a rear portion of the motorcycle according to the present invention (an arrow (FRONT) in the drawing indicating a front portion of the vehicle, the same definition applicable hereinafter) . In the drawing, a cross plate 151 is extended and mounted between the rear portions of the seat rails 23, 24 (only the symbol 23 on the reader's side shown in the drawing), a grab rail 8 7 is mounted on the cross plate 151 using a plurality of bolts 152, and a hook 154 and a rubber plate 156 are mounted on the cross plate 151. Further, an inserting portion 157a is integrally formed on a bottom plate 15 7 which is mounted on a lower portion of the seat 16, wherein the inserting portion 15 7a projects from the bottom plate 157 . Fig. 2 shows a state in which by inserting the inserting portion 157a into the hook 154, a rear portion of the seat 16 is engaged with the seat rail 23, 24 side. [0028] The cross plate 151 is a member having the following constitution. That is, the cross plate 151 includes an L-shaped cross-sectional portion 163 which is constituted of a center inclined portion 161 which is arranged substantially horizontally and a raised portion 162 which is raised from a rear end of the center inclined portion 161. Further, the hook 154 and the rubber plate 156 are mounted on the center inclined portion 161, an upper end of the raised portion 162 is bent rearwardly to form a rear seat load receiver 162a, and a regulator 164 which regulates a charge voltage of a charging system is mounted on a back surface 162b of the raised portion 162. The above-mentioned hook 154 and the rubber plate 156 are members which constitute an engaging portion 165 which is engaged with the inserting portion 157a on the seat 16 side. [0029] The grab rail 87 is constituted of base portions 166, 167 (only the symbol 167 on a depth side shown in the drawing) which are mounted on the cross plate 151, a grab rail body 168 which is mounted on these base portions 166, 167 and a grip portion 172 which is mounted on a rear portion of the grab rail body 168 using small bolts 171. [0030] The bottom plate 157 of the seat 16 forms a contact surface 157b which can come into contact with the rear seat load receiver 162a of the cross plate 151 on a portion thereof which is arranged at a rear oblique upper position with respect to the inserting portion 157a. Here, numerals 174, 174 (only the symbol 174 on a depth side shown in the drawing) indicate cushion rubbers which are mounted on the bottom plate 157, wherein the cushion rubbers are brought into contact with the base portions 166, 167 of the grab rail 87. [0031] Fig. 3 is a perspective view of a rear portion of the motorcycle according to the present invention. The drawing shows that the grab rail 87 is mounted on the seat rails 23, 24 by mounting the base portions 166, 167 on the cross plate 151 using two bolts 152 respectively, and mounting portions 144a, 144b which are to be mounted on the rear portion of the cross plate 151 are formed on an inner surface of the rear cover 144 which covers a rear portion of the vehicle body in a state that the mounting portions 144a, 144b project from the inner surface of the rear cover 144. Here, fastening members which mount the mounting portions 144a, 144b on the cross plate 151 are omitted. Numeral 17 8 indicates a nut which is mounted on the raised portion 162 for mounting the regulator 164 on the raised portion 162 of the cross plate 151. The rear cover 144 is constituted of a pair of left and right rear side covers 181, 182 and a rear center cover 183 which is arranged between upper portions of rear portions of these rear side covers 181, 182. [0032] Fig. 4 is a cross-sectional view (an exploded view) which shows an assembling state of the rear portion of the vehicle body according to the present invention. The cross plate 151 constitutes a member which forms a plurality of nuts 186 on a bottom surface 151a thereof, forms hook inserting holes 151b, 151b (only the symbol 151b on a depth side shown in the drawing) which allow the insertion of the hook 154 and a rubber plate inserting hole 151c which allows the insertion of the mounting projecting portion 156a integrally formed on a bottom surface of the rubber plate 156, and mounts a nut 178 for mounting the regulator on a front surface 162d of the raised portion 162. [0033] Mounting of the regulator 164 on the raised portion 162 is performed by inserting the bolt 187 into a mounting hole 164a formed in the regulator 164 and a bolt inserting hole 162e formed in the raised portion 162 respectively and by threadedly engaging the bolt 187 with the nut 178. [0034] The base portions 166, 167 (only the symbol 167 on a depth side shown in the drawing) of the grab rail 87 respectively mount a plurality of collars 188 on back surfaces 166a, 167a (only the symbol 167a of one back surface shown in the drawing) thereof and bring the cushion rubbers 174 on the seat 16 side into contact with upper surfaces 166b, 167b (only the symbol 167b of one upper surface shown in the drawing) thereof. [0035] Mounting of the grab rail 87 on the cross plate 151 is performed by inserting a plurality of bolts 152 in bolt inserting holes 166c, 167c (only the symbol 167c on a depth side shown in the drawing) formed in the base portions 166, 167, a plurality of collars 188 and a plurality of bolt inserting holes 151d formed in the cross plate 151, and by threadedly engaging the plurality of respective bolts 152 with the plurality of nuts 186. [0036] The cushion rubber 174 is constituted of a columnar cushion body 174a and a mounting end portion 174b which is integrally formed with an upper end of the cushion body 174a for mounting the cushion rubber 174 on the bottom plate 157, wherein the cushion rubber 174 can be mounted by fitting the mounting end portion 174b in a mounting hole 157c formed in the bottom plate 157. [0037] Fig. 5 is a plan view of the cross plate according to the present invention. The cross plate 151 is a member which is constituted of frame-side mounting portions 151e, 151e which are arranged at left and right sides to be mounted on the seat rails 23, 24, a center inclined portion 161 which is inclined with respect to these frame-side mounting portions 151e, 151e such that a rear portion is arranged lower than a front portion, and the raised portion 162 which is formed on a rear portion of the center inclined portion 161. In such a constitution, a plurality of bolt inserting holes 151d are formed in the frame-side mounting portions 151e, 151e and a plurality of nuts 186 are mounted on a bottom surface of the frame-side mounting portions 151e, 151e. Further, bolt inserting holes 151f, 151f which allow bolts for mounting the mounting portions 144a, 144b of the rear cover 144 to pass therethrough are formed in rear portions of the frame-side mounting portions 151e, 151e and, at the same time, nuts 191, 191 are mounted on bottom surfaces of the frame-side mounting portions 151e, 151e. The hook 154 is a member having a U-shape in a plan view and a width of the rubber plate 156 is substantially arranged equal to a lateral width of the inside of the hook 154. [0038] Fig. 6 is a transverse cross-sectional view of the rear portion of the vehicle body according to the present invention. The cross plate 151 is a member which has an approximately U-shaped cross section, wherein the frame-side mounting portion 151e is constituted of vertical portions 151g which extend substantially vertically from the seat rails 23, 24 and a horizontal portion 151h which extends from upper end portions of the vertical portions 151g in a substantially horizontal manner. [0039] The base portions 166, 167 are respectively constituted of load receiving flat portions 166d, 167d which are mounted on the frame-side mounting portions 151e of the cross plate 151, sideward inclined portions 166e, 167e which are extended obliquely in the sideward and downward direction from the load receiving flat portions 166d, 167d respectively, and side horizontal portions 166f, 167f which are respectively extended sideward and substantially horizontally from the side inclined portions 166e, 167e and are mounted on the grab rail body 168. [0040] By forming the load receiving flat portions 166d, 167d for receiving a load of the seat 16 on the above-mentioned base portions 166, 167 by way of the cushion rubbers 174, 174, a distance D between the cushion rubbers 174, 174 can be increased compared to a case in which the cushion rubbers 174, 174 are brought into contact with the cross plate 151 and hence, the inclination of the seat 16 in the lateral direction of the vehicle can be further suppressed. [0041] As shown in Fig. 2, Fig. 4 and Fig. 6 described above, the present invention is characterized in that the inserting portion 157a is formed on the lower portion of the seat 16 in a projecting manner, the engaging portion 165 which is engaged with the inserting portion 157a is formed on the cross plate 151 which constitutes a cross member, the gate-shaped hook 154 is formed on the cross plate 151 in the engaging portion 165, and the rubber plate 156 which constitutes the rubber is arranged below the hook 154. [0042] By providing the inserting portion 157a of the seat 16 and the engaging portion 165 which is engaged with the inserting portion 157a, by forming the hook 154 on the cross plate 151 in the engaging portion 165, and by arranging the rubber plate 156 below the hook 154, in the engaging portion 165, there is no possibility that the inserting portion 157a of the seat 16 and the cross plate 151 are brought into direct contact with each other due to the provision of the rubber plate 156 and, at the same time, the riding feeling can be enhanced due to a resilient force of the rubber plate 156. [0043] Further, the present invention is also characterized by mounting the regulator 164 on the back surface 162b of the raised portion 162. Due to the provision of the raised portion 162, the radiation of heat from the regulator 164 is accelerated and hence, the performance of the regulator 164 can be maintained. [0044] Further, the present invention is characterized by mounting the grab rail 87 on the cross plate 151 and by forming the load receiving flat portions 166d, 167d as the third load receiver on the grab rail 87, and more particularly, on the base portions 166, 167. [0045] Since the load receiving flat portions 166d, 167d are formed on the base portions 166, 167 of the grab rail 87, the distance in the lateral direction of the vehicle between the load receiving flat portions 166d, 167d, that is, the distance D in the lateral direction of the vehicle between the cushion rubbers 174, 174 which are brought into contact with the load receiving flat portions 166d, 167d can be increased whereby the inclination of the seat 16 on the left and right sides can be suppressed. [0046] The manner of operation of the seat support structure described above is explained hereinafter. Fig. 7(a), (b) are operational views which show the manner of operation of the seat support structure according to the present invention. In Fig. 7(a), for example, when only a rider sits on the front portion of the seat 16 or a small load (seat load Fl) acts on the rear portion of the seat 16, as shown in Fig. 6, the cushion rubbers 174 on the seat 16 side are brought into contact with the load receiving flat portions 166d, 167d and, at the same time, lower portions of the inserting portions 157a of the bottom plate 157 shown in Fig. 7(a) push the center inclined portion 161 of the cross plate 151 downwardly by way of the rubber plate 156. [0047] In Fig. 7(b), for example, when the rider sits on the front portion of the seat 16 and the pillion sits on the rear portion of the seat 16, the seat 16 is further deflected from the state shown in Fig. 7(a) and hence, the contact surface 157b formed on the rear end portion of the bottom plate 157 is brought into contact with the rear seat load receiver 162a formed on the upper end of the raised portion 162 of the cross plate 151 and receives the seat load F2 (F2>F1) . Accordingly, even when the seat load F2 is large, it is possible to suppress the large sinking of the seat 16 with the provision of the rear seat load receiver 162a. [0048] Accordingly, even when the gap C between the seat 16 and the rear cover 144 in a state that neither the rider nor the pillion sits on the seat 16 shown in Fig. 2 is small, it is possible to prevent the interference between the seat 16 and the rear cover 144 whereby the gap C becomes less conspicuous thus enhancing the appearance of the rear portion of the vehicle. [0049] Fig. 8 is a cross-sectional view showing a rear portion of a rear fender of the motorcycle according to the present invention. In the drawing, a pair of left and right through holes 138a, 138a are formed in the rear fender 13 8, mounting bolts 201, 201 are allowed to pass through these through holes 138a, 138a and these mounting bolts 201, 201 are threadedly engaged with nuts 202, 202 whereby, on the rear fender 138, a license plate support stay 204 which supports a license plate 203 and a blinker stay 143 which supports rear blinkers 141, 142 together with the rear fender 138 are mounted. [0050] Here, numerals 208, 211 indicate bolts and nuts which are served for mounting the license plate 2 03 on the license plate support stay 2 04, numeral 212 indicates nuts which are threadedly engaged with bolts 213 projected from the rear blinkers 141, 142 respectively for jointly fastening the rear fender 138 and the blinker stay 143. [0051] The rear fender 138, the license plate support stay 204 and the blinker stay 143 are members which are respectively bent in a convex shape in the rearward direction of the vehicle to form convex bent portions 138c, 204c, 143c thus obviating the interference with the rear wheel 122. By arranging the rear fender 138, the license plate support stay 204 and the blinker stay 143 closer to the front portion of the vehicle, a total length of the motor cycle can be reduced. [0052] As shown in Fig. 2, Fig. 4 and Fig. 7(a), (b) described above, the present invention is characterized in that in the motorcycle 10 (see Fig. 1) in which the seat load which acts on the seat 16 is received by the cross plate 151 mounted on the rear portion of the vehicle body, the raised portion 162 is formed by raising the cross plate 151 behind the center inclined portion 161 which constitutes the first load receiver which is mounted on the cross plate 151, and the rear seat load receiver 162a which constitutes the second load receiver is mounted on the raised portion 162. [0053] Since the rear seat load receiver 162a is formed on the raised portion 162 which is formed behind the center inclined portion 161, when the rider and the pillion sit on the seat 16, the load (seat load F2) which acts on the seat 16 can be received by the center inclined portion 161 and the rear seat load receiver 162a. Particularly, the sinking of the rear portion of the seat can be restricted by the rear seat load receiver 162a. Further, for example, it is unnecessary to form the large gap C (see Fig. 2) between the seat 16 and the rear cover 144 which constitutes the vehicle body cover by taking the sinking of the seat 16 into consideration and hence, it is possible to enhance the appearance of the rear portion of the vehicle. [Industrial Applicability] [0055] The seat support structure of the present invention is preferably applicable to the motorcycle. [Description of Reference Numerals and Signs] [0056] 10: motorcycle, 16: seat, 87: grab rail, 151: cross member (cross plate), 154: hook, 156: rubber (rubber plate), 157a: inserting portion, 161: first load receiver (center inclining portion), 162: raised portion, 162a: second load receiver (rear seat load receiver), 162b: back surface, 164: regulator, 165: engaging portion, 166d, 167d: third load receiver (load receiving flat portion) [Designation of Document] Claims [Claim 1] A seat support structure of a motorcycle in which a seat load which acts on a seat is received by a cross member mounted on a rear portion of a vehicle body, wherein a raised portion is formed by raising the cross member behind a first load receiver which is mounted on the cross member, and a second load receiver is mounted on the raised portion. [Claim 2] A seat support structure of a motorcycle according to claim 1, wherein an inserting portion is formed on a lower portion of the seat in a projecting manner, an engaging portion which is engaged with the inserting portion is mounted on the cross member, and the engaging member is configured such that a gate-shaped hook is mounted on the cross member and a rubber is arranged below the hook. [Claim 3] A seat support structure of a motorcycle according to claim 1 or claim 2, wherein a regulator is mounted on a back surface of the raised portion. [Claim 4] A seat support structure of a motorcycle according to claim 1, claim 2 or claim 3, wherein grab rails are mounted on the cross member and third load receivers which receive a Seat load are mounted on the grab rails. 5. A seat support structure of a motorcycle substantially as hereinbefore described with reference to the accompanying drawings.

Full Text

[Designation of Document] specification
[Title of the Invention] SEAT SUPPORT STRUCTURE OF MOTORCYCLE
[Technical Field]
[0001]
The present invention relates to an improvement of the seat support structure of a motorcycle. [Background Art] [0002]
As the conventional seat support structure of a motorcycle, there has been known the seat support structure which receives a load which acts on a seat by supporting a mounting member formed on a lower portion of the seat using support bolts mounted on a seat rail side (for example, see patent literature 1).
[Patent Literature 1] Japanese Patent Laid-open 2002-284075 [0003]
Fig. 3 and Fig. 5 of the patent literature 1 show the structure in which a mounting member 32 extends downwardly from a bottom plate 31 of a seat S at an approximately center portion thereof in the longitudinal direction, a support bolt 36 is mounted on a rail frame 16 of a seat rail 11 mounted on a rear portion of a vehicle body frame by way of a bracket 35, an elongated hole 33 is formed in a lower portion of the mounting member 32, and the support bolt 36 is inserted into the
elongated hole 33, whereby a load which acts on the seat S is supported on the support bolt 36 by way of the mounting member.
The seat S is vertically movable within a range of a gap between the elongated hole 33 and the support bolt 36. [Disclosure of the Invention] [0004]
For example, the sinking of the seat S attributed to a rider who sits on a front portion of the seat S is restricted by the mounting member 32 and the support bolt 36. However, sinking of the seat S attributed to a pillion who sits on a rear portion of the seat S is not taken into consideration with respect to the above-mentioned motorcycle and hence, when the load which acts on the rear portion of the seat S is large, there may be a case in which the sinking of the rear portion of the seat S becomes excessively large. Accordingly, for example, when a gap between the seat S and a rear cowl which is arranged below the seat S is largely set by taking such a large sinking into consideration, the gap becomes conspicuous thus worsening the appearance.
It is an object of the present invention to restrict the sinking of a rear portion of a seat by improving the seat support structure of a motorcycle. [Means for Solving the Problem] [0005]
The invention according to claim 1 is characterized in
that, in a motorcycle in which a seat load which acts on a seat is received by a cross member mounted on a rear portion of a vehicle body, a raised portion is formed by raising the cross member behind a first load receiver which is mounted on the cross member, and a second load receiver is mounted on the raised portion. [0006]
The load which acts on the seat is supported by the first load receiver which is mounted on the cross member and the second load receiver of the raised portion which is formed by raising the cross member behind the first load receiver.
Particularly, the second load receiver supports the seat load attributed to the pillion who rides on the rear portion of the seat and can suppress the sinking of the rear portion of the seat. [0007]
The invention according to claim 2 is characterized in that an inserting portion is formed on a lower portion of the seat in a projecting manner, an engaging portion which is engaged with the inserting portion is mounted on the cross member, and the engaging member is configured such that a gate-shaped hook is mounted on the cross member and a rubber is arranged below the hook. [0008]
When the inserting portion formed on the lower portion
of the seat in a projecting manner is engaged with the engaging portion formed on the cross member, due to the provision of the rubber, there is no possibility that the inserting portion comes into direct contact with the cross member and, at the same time, a buffer effect can be achieved. [0009]
The invention according to claim 3 is characterized in that a regulator is mounted on a back surface of the raised portion.
The heat generated by the regulator is transferred to the raised portion and is irradiated from the regulator per se and the raised portion. [0010]
The invention according to claim 4 is characterized in that grab rails are mounted on the cross member and third load receivers are mounted on the grab rails.
By mounting the grab rails on both sides of the cross member, it is possible to increase a distance between the third load receivers which are provided on left and right sides of the grab rails and hence, the inclination of the seat in the lateral direction can be suppressed correspondingly. [Advantage of the Invention] [0011]
According to the invention described in claim 1, since the second load receiver is formed on the raised portion which
is formed behind the first load receiver, when the rider and the pillion sit on the seat, the load which acts on the seat can be received by the first load receiver and the second load receiver. Particularly, the sinking of the rear portion of the seat can be restricted by the second load receiver. Further, for example, it is unnecessary to form the large gap between the seat and the vehicle body cover by taking the sinking of the seat into consideration and hence, it is possible to enhance the appearance of the rear portion of the vehicle. [0012]
According to the invention described in claim 2, the seat support structure includes the inserting portion which is formed on the lower portion of the seat in a projecting manner and the engaging portion which is engaged with the inserting portion, and the gate-shaped hook is mounted on the cross member and the rubber is arranged below the hook in the engaging portion and hence, there is no possibility that the inserting portion below the seat and the cross member directly come into contact with each other in the engaging portion whereby the riding feeling can be enhanced. [0013]
According to the invention described in claim 3, since the regulator is mounted on the back surface of the raised portion, it is possible to accelerate the radiation of heat from the regulator by the raised portion whereby the
performance of the regulator can be maintained. [0014]
According to the invention described in claim 4, since the grab rails are mounted on the cross member and the third load receivers are mounted on the grab rails, it is possible to increase the lateral span of the third load receivers whereby the inclination of the seat in the lateral direction can be suppressed.
[Best Mode for Carrying out the Invention] [0015]
Hereinafter, the best mode for carrying out the present invention is explained in conjunction with attached drawings.
[Brief Description of the Drawings] [0054]
[Fig. 1] A side view of a motorcycle according to the
present invention.
[Fig. 2] A cross-sectional view of a rear portion of the motorcycle according to the present invention.
[Fig. 3] A perspective view of the rear portion of the motorcycle according to the present invention.
[Fig. 4] A cross-sectional view showing an assembled
state of a rear portion of a vehicle body according to the present invention.
[Fig. 5] A plan view of a cross plate according to the present invention.
[Fig. 6] A transverse cross-sectional view of the rear portion of the vehicle body according to the present invention;
[Fig. 7] An operational view showing an operation of the seat support structure according to the present invention.
[Fig. 8] A cross-sectional view showing a rear portion of a rear fender of the motorcycle according to the present invention.
Here, the drawings are viewed in the same direction as numerals . Fig. 1 is a side view of a motorcycle of the present invention. The motorcycle 10 is a vehicle which is characterized in that a handle stopper mechanism which regulates a steering angle of a bar handle 11 is improved, a protecting function of a handle lock device which locks steering of the bar handle 11 can be enhanced, the appearance of a periphery of the front cowl 12 is enhanced, a volume of a storing box 14 which is provided below a fuel tank 13 is increased and, at the same time, the appearance of the periphery of a storing box 14 is enhanced. The sinking of a seat which occurs when a pillion sits on a rear portion of the seat 16 is suppressed, and the degree of freedom in arranging a helmet
holder 18 which is mounted on a rear portion side of the vehicle
body frame 17 can be enhanced.
[0016]
The motorcycle 10 is a vehicle which has the following constitution.
The vehicle body frame 17 is constituted of a head pipe 21 which forms a front end thereof, a main frame 22 which is extended obliquely in the rearward and downward directions from the head pipe 21, a pair of left and right seat rails 23, 24 (only symbol 23 on a reader's side being shown in the drawing) which are extended rearwardly from a rear end portion of the main frame 22, a pair of left and right down frames 26, 2 7 which are extended in the substantially downward and rearward directions from a front end portion of the main frame 22, a pair of left and right center frames 28, 31 (only symbol 28 on a reader's side being shown in the drawing)which are respectively connected with rear end portions of the down frames 26, 27 in a state that the center frames 28, 31 are extended obliquely in the downward and rearward directions from a rear portion of the main frame 22 and, thereafter, in the downward direction and a pair of left and right sub frames 32, 33 (only symbol 32 on a reader' s side being shown in the drawing) which are respectively extended between the seat rails 23, 24 and the center frames 28, 31. Further, a front fork 3 6 is rotatably mounted on the head pipe 21 and, a fuel tank 13 is
mounted on the main frame 22. A power unit 43 which is constituted of an engine 41 and a transmission 42 is supported on a pair of left and right pivot plates 37, 38 (only symbol 37 on a reader's side being shown in the drawing) mounted on the center frames 28, 31, and, at the same time, a swing arm
45 is also supported on the pivot plates 37, 38 in a vertically swingable manner. The seat 16 and a rear side guard member
46 which is mounted on a rear left side of the seat 16 are supported on the seat rails 23, 24.
[0017]
The front fork 3 6 is formed by connecting a pair of left and right fork single bodies 51, 52 (only symbol 51 on a reader's side being shown in the drawing) using a top bridge 53 and a bottom bridge 54 which is arranged below the top bridge 53. The bar handle 11 and a handle lock device 56 are mounted on the top bridge 53. A cowl support stay 57 is mounted on the top bridge 53 and the bottom bridge54 so as to support the front cowl 12 by the cowl support stay 57 and, at the same time, the cowl support stay 57 also supports a meter 58, an inner cowl 61, a blinker support stay 62 and a front number plate 63. [0018]
Here, numeral 65 indicates a head lamp which is mounted on the front cowl 12, numerals 66 and 67 (only symbol 66 on a reader's side being shown in the drawing) indicate a pair of left and right front blinkers which are mounted on left and
right sides of the blinker support stay 62, numeral 68 indicates a front wheel which is mounted on a lower end of the front fork 36, and numeral 71 indicates a front fender which covers the front wheel 68 from above. [0019]
A storing box 14 is positioned between the main frame 22 and a cylinder portion 73 of the engine 41 and is mounted on the lower portion of the main frame 22 by way of a bracket 74. The storing box 14 is constituted of a case 76 which has an opening and a lid (not shown in the drawing) which closes the opening. The fuel tank 13 has a lower side portion thereof covered with an extended portion 78 which is extended rearwardly from the case 76. Further, both side portions of the fuel tank 13 are covered with a left cover 81 and a right cover (not shown in the drawing). [0020]
The seat 16 is a member which has an insertion portion which is mounted on a rear lower portion thereof engaged with engaging portions on the seat rail 23, 24 side and a pair of left and right mounting members 85, 86 (only symbol 85 on a reader's side being shown in the drawing) formed on a front lower portion fixed to the seat rail 23, 24 side using bolts. Here, numeral 87 indicates grab rails which are mounted on the rear portions of the seat rails 23, 24. [0021]

A helmet holder 18 is mounted on an upper portion of a rear side guard member 46. The helmet holder 18 is a member which can be locked and is arranged in a state that the helmet holder 18 does not obstruct the movement of legs of a rider who rides on a rear portion of the seat 16. Here, numerals 91, 92 (only symbol 91 on a reader's side being shown in the drawing) indicate bar members which are extended obliquely in the rearward and downward directions from the sub frames 32, 33. Steps 93, 94 (only symbol 93 on a reader's side being shown in the drawing) for a pillion who rides on a rear portion of the seat 16 are respectively mounted on lower ends of the bar members 91, 92, and, at the same time, the bar members 91, 92 are connected to the lower portion of the rear sideward guard member 46 by way of a frame side stay 96. [0022]
In the engine 41, an intake device 102 and an exhaust device 103 are mounted on a cylinder head 101 which is mounted on a cylinder portion 73.
The in take device 102 includes a carburetor 106 which constitutes a fuel supply device which is connected to an upper portion of the cylinder head 101 by way of an intake tube 105 and an air cleaner 108 which is connected to the carburetor 106 by way of a connecting tube 107. The air cleaner 108 is arranged in a space where is surrounded by the seat rails 23, 24, the center frames 28, 31 and the sub frames 32, 33. Here,
it is needless to say that the above-mentioned carburetor 106 may be formed of an injector or a throttle body of the fuel injection device. [0023]
Here, numeral 111 indicates an intake opening of the air cleaner 108, numeral 112 indicates a throttle cable which is extended from a throttle grip (not shown in the drawing) mounted on the bar handle 11 to the carburetor 106, numeral 113 indicates a clutch cable which is extended from a clutch lever mounted on the bar handle 11 to the power unit 43, and numeral
114 indicates a battery which is arranged on a depth side of
the air cleaner 108.
[0024]
The exhaust device 103 is constituted of an exhaust pipe
115 which is mounted on a lower portion of the cylinder head
101 and a muffler 116 which is mounted on a rear end of the
exhaust pipe 115. In the exhaust device 103, the muffler 116
is supported by way of the depth side bar member 92 and a muffler
stay 117 which is mounted on a distal end of the bar member
92.
[0025]
The swing arm 45 is a member which is mounted on the pivot plates 37, 38 by way of the pivot shaft 121. A rear wheel 122 and respective lower ends of a pair of left and right rear cushion units 123, 123 (only symbol 123 on a reader's side being
shown in the drawing) are mounted on a rear end portion of the swing arm 45. Here, an upper end of the rear cushion unit 123 is mounted on rail lower brackets 125, 125 (only symbol 125 on a reader's side being shown in the drawing) which are respectively mounted on the seat rails 23, 24. Numeral 126 indicates a chain cover.
The pivot plates 37, 38 are members which mount power unit support portions 131 to 133 for supporting an upper portion and a rear portion of the power unit 43 thereon. [0026]
Here, numeral 137 indicates a stand, numeral 138 indicates a rear fender which is mounted on the seat rails 23, 24 and rail lower brackets 125, 125 so as to cover the rear wheel 122 from above, numerals 141, 142 (only symbol 141 on a reader's side being shown in the drawing) indicate a pair of left and right rear blinkers which are mounted on a blinker stay 143 mounted on the rear fender 138, numerals 144, 146 respectively indicate a rear cover and a tail lamp which are mounted on the rear fender 138. [0027]
Fig. 2 is a cross-sectional view of a rear portion of the motorcycle according to the present invention (an arrow (FRONT) in the drawing indicating a front portion of the vehicle, the same definition applicable hereinafter) . In the drawing, a cross plate 151 is extended and mounted between the rear
portions of the seat rails 23, 24 (only the symbol 23 on the reader's side shown in the drawing), a grab rail 8 7 is mounted on the cross plate 151 using a plurality of bolts 152, and a hook 154 and a rubber plate 156 are mounted on the cross plate 151. Further, an inserting portion 157a is integrally formed on a bottom plate 15 7 which is mounted on a lower portion of the seat 16, wherein the inserting portion 15 7a projects from the bottom plate 157 . Fig. 2 shows a state in which by inserting the inserting portion 157a into the hook 154, a rear portion of the seat 16 is engaged with the seat rail 23, 24 side. [0028]
The cross plate 151 is a member having the following constitution. That is, the cross plate 151 includes an L-shaped cross-sectional portion 163 which is constituted of a center inclined portion 161 which is arranged substantially horizontally and a raised portion 162 which is raised from a rear end of the center inclined portion 161. Further, the hook 154 and the rubber plate 156 are mounted on the center inclined portion 161, an upper end of the raised portion 162 is bent rearwardly to form a rear seat load receiver 162a, and a regulator 164 which regulates a charge voltage of a charging system is mounted on a back surface 162b of the raised portion 162.
The above-mentioned hook 154 and the rubber plate 156 are members which constitute an engaging portion 165 which is
engaged with the inserting portion 157a on the seat 16 side. [0029]
The grab rail 87 is constituted of base portions 166, 167 (only the symbol 167 on a depth side shown in the drawing) which are mounted on the cross plate 151, a grab rail body 168 which is mounted on these base portions 166, 167 and a grip portion 172 which is mounted on a rear portion of the grab rail body 168 using small bolts 171. [0030]
The bottom plate 157 of the seat 16 forms a contact surface 157b which can come into contact with the rear seat load receiver 162a of the cross plate 151 on a portion thereof which is arranged at a rear oblique upper position with respect to the inserting portion 157a. Here, numerals 174, 174 (only the symbol 174 on a depth side shown in the drawing) indicate cushion rubbers which are mounted on the bottom plate 157, wherein the cushion rubbers are brought into contact with the base portions 166, 167 of the grab rail 87. [0031]
Fig. 3 is a perspective view of a rear portion of the motorcycle according to the present invention. The drawing shows that the grab rail 87 is mounted on the seat rails 23, 24 by mounting the base portions 166, 167 on the cross plate 151 using two bolts 152 respectively, and mounting portions 144a, 144b which are to be mounted on the rear portion of the
cross plate 151 are formed on an inner surface of the rear cover 144 which covers a rear portion of the vehicle body in a state that the mounting portions 144a, 144b project from the inner surface of the rear cover 144. Here, fastening members which mount the mounting portions 144a, 144b on the cross plate 151 are omitted. Numeral 17 8 indicates a nut which is mounted on the raised portion 162 for mounting the regulator 164 on the raised portion 162 of the cross plate 151.
The rear cover 144 is constituted of a pair of left and right rear side covers 181, 182 and a rear center cover 183 which is arranged between upper portions of rear portions of these rear side covers 181, 182. [0032]
Fig. 4 is a cross-sectional view (an exploded view) which shows an assembling state of the rear portion of the vehicle body according to the present invention. The cross plate 151 constitutes a member which forms a plurality of nuts 186 on a bottom surface 151a thereof, forms hook inserting holes 151b, 151b (only the symbol 151b on a depth side shown in the drawing) which allow the insertion of the hook 154 and a rubber plate inserting hole 151c which allows the insertion of the mounting projecting portion 156a integrally formed on a bottom surface of the rubber plate 156, and mounts a nut 178 for mounting the regulator on a front surface 162d of the raised portion 162. [0033]
Mounting of the regulator 164 on the raised portion 162 is performed by inserting the bolt 187 into a mounting hole 164a formed in the regulator 164 and a bolt inserting hole 162e formed in the raised portion 162 respectively and by threadedly engaging the bolt 187 with the nut 178. [0034]
The base portions 166, 167 (only the symbol 167 on a depth side shown in the drawing) of the grab rail 87 respectively mount a plurality of collars 188 on back surfaces 166a, 167a (only the symbol 167a of one back surface shown in the drawing) thereof and bring the cushion rubbers 174 on the seat 16 side into contact with upper surfaces 166b, 167b (only the symbol 167b of one upper surface shown in the drawing) thereof. [0035]
Mounting of the grab rail 87 on the cross plate 151 is performed by inserting a plurality of bolts 152 in bolt inserting holes 166c, 167c (only the symbol 167c on a depth side shown in the drawing) formed in the base portions 166, 167, a plurality of collars 188 and a plurality of bolt inserting holes 151d formed in the cross plate 151, and by threadedly engaging the plurality of respective bolts 152 with the plurality of nuts 186. [0036]
The cushion rubber 174 is constituted of a columnar cushion body 174a and a mounting end portion 174b which is
integrally formed with an upper end of the cushion body 174a for mounting the cushion rubber 174 on the bottom plate 157, wherein the cushion rubber 174 can be mounted by fitting the mounting end portion 174b in a mounting hole 157c formed in the bottom plate 157. [0037]
Fig. 5 is a plan view of the cross plate according to the present invention. The cross plate 151 is a member which is constituted of frame-side mounting portions 151e, 151e which are arranged at left and right sides to be mounted on the seat rails 23, 24, a center inclined portion 161 which is inclined with respect to these frame-side mounting portions 151e, 151e such that a rear portion is arranged lower than a front portion, and the raised portion 162 which is formed on a rear portion of the center inclined portion 161. In such a constitution, a plurality of bolt inserting holes 151d are formed in the frame-side mounting portions 151e, 151e and a plurality of nuts 186 are mounted on a bottom surface of the frame-side mounting portions 151e, 151e. Further, bolt inserting holes 151f, 151f which allow bolts for mounting the mounting portions 144a, 144b of the rear cover 144 to pass therethrough are formed in rear portions of the frame-side mounting portions 151e, 151e and, at the same time, nuts 191, 191 are mounted on bottom surfaces of the frame-side mounting portions 151e, 151e.
The hook 154 is a member having a U-shape in a plan view
and a width of the rubber plate 156 is substantially arranged equal to a lateral width of the inside of the hook 154. [0038]
Fig. 6 is a transverse cross-sectional view of the rear portion of the vehicle body according to the present invention. The cross plate 151 is a member which has an approximately U-shaped cross section, wherein the frame-side mounting portion 151e is constituted of vertical portions 151g which extend substantially vertically from the seat rails 23, 24 and a horizontal portion 151h which extends from upper end portions of the vertical portions 151g in a substantially horizontal manner. [0039]
The base portions 166, 167 are respectively constituted of load receiving flat portions 166d, 167d which are mounted on the frame-side mounting portions 151e of the cross plate 151, sideward inclined portions 166e, 167e which are extended obliquely in the sideward and downward direction from the load receiving flat portions 166d, 167d respectively, and side horizontal portions 166f, 167f which are respectively extended sideward and substantially horizontally from the side inclined portions 166e, 167e and are mounted on the grab rail body 168. [0040]
By forming the load receiving flat portions 166d, 167d for receiving a load of the seat 16 on the above-mentioned base
portions 166, 167 by way of the cushion rubbers 174, 174, a distance D between the cushion rubbers 174, 174 can be increased compared to a case in which the cushion rubbers 174, 174 are brought into contact with the cross plate 151 and hence, the inclination of the seat 16 in the lateral direction of the vehicle can be further suppressed. [0041]
As shown in Fig. 2, Fig. 4 and Fig. 6 described above, the present invention is characterized in that the inserting portion 157a is formed on the lower portion of the seat 16 in a projecting manner, the engaging portion 165 which is engaged with the inserting portion 157a is formed on the cross plate 151 which constitutes a cross member, the gate-shaped hook 154 is formed on the cross plate 151 in the engaging portion 165, and the rubber plate 156 which constitutes the rubber is arranged below the hook 154. [0042]
By providing the inserting portion 157a of the seat 16 and the engaging portion 165 which is engaged with the inserting portion 157a, by forming the hook 154 on the cross plate 151 in the engaging portion 165, and by arranging the rubber plate 156 below the hook 154, in the engaging portion 165, there is no possibility that the inserting portion 157a of the seat 16 and the cross plate 151 are brought into direct contact with each other due to the provision of the rubber plate 156 and,
at the same time, the riding feeling can be enhanced due to
a resilient force of the rubber plate 156.
[0043]
Further, the present invention is also characterized by mounting the regulator 164 on the back surface 162b of the raised portion 162.
Due to the provision of the raised portion 162, the radiation of heat from the regulator 164 is accelerated and hence, the performance of the regulator 164 can be maintained. [0044]
Further, the present invention is characterized by mounting the grab rail 87 on the cross plate 151 and by forming the load receiving flat portions 166d, 167d as the third load receiver on the grab rail 87, and more particularly, on the base portions 166, 167. [0045]
Since the load receiving flat portions 166d, 167d are formed on the base portions 166, 167 of the grab rail 87, the distance in the lateral direction of the vehicle between the load receiving flat portions 166d, 167d, that is, the distance D in the lateral direction of the vehicle between the cushion rubbers 174, 174 which are brought into contact with the load receiving flat portions 166d, 167d can be increased whereby the inclination of the seat 16 on the left and right sides can be suppressed.
[0046]
The manner of operation of the seat support structure described above is explained hereinafter.
Fig. 7(a), (b) are operational views which show the manner of operation of the seat support structure according to the present invention.
In Fig. 7(a), for example, when only a rider sits on the front portion of the seat 16 or a small load (seat load Fl) acts on the rear portion of the seat 16, as shown in Fig. 6, the cushion rubbers 174 on the seat 16 side are brought into contact with the load receiving flat portions 166d, 167d and, at the same time, lower portions of the inserting portions 157a of the bottom plate 157 shown in Fig. 7(a) push the center inclined portion 161 of the cross plate 151 downwardly by way of the rubber plate 156. [0047]
In Fig. 7(b), for example, when the rider sits on the front portion of the seat 16 and the pillion sits on the rear portion of the seat 16, the seat 16 is further deflected from the state shown in Fig. 7(a) and hence, the contact surface 157b formed on the rear end portion of the bottom plate 157 is brought into contact with the rear seat load receiver 162a formed on the upper end of the raised portion 162 of the cross plate 151 and receives the seat load F2 (F2>F1) . Accordingly, even when the seat load F2 is large, it is possible to suppress
the large sinking of the seat 16 with the provision of the rear
seat load receiver 162a.
[0048]
Accordingly, even when the gap C between the seat 16 and the rear cover 144 in a state that neither the rider nor the pillion sits on the seat 16 shown in Fig. 2 is small, it is possible to prevent the interference between the seat 16 and the rear cover 144 whereby the gap C becomes less conspicuous thus enhancing the appearance of the rear portion of the vehicle. [0049]
Fig. 8 is a cross-sectional view showing a rear portion of a rear fender of the motorcycle according to the present invention. In the drawing, a pair of left and right through holes 138a, 138a are formed in the rear fender 13 8, mounting bolts 201, 201 are allowed to pass through these through holes 138a, 138a and these mounting bolts 201, 201 are threadedly engaged with nuts 202, 202 whereby, on the rear fender 138, a license plate support stay 204 which supports a license plate 203 and a blinker stay 143 which supports rear blinkers 141, 142 together with the rear fender 138 are mounted. [0050]
Here, numerals 208, 211 indicate bolts and nuts which are served for mounting the license plate 2 03 on the license plate support stay 2 04, numeral 212 indicates nuts which are
threadedly engaged with bolts 213 projected from the rear blinkers 141, 142 respectively for jointly fastening the rear fender 138 and the blinker stay 143. [0051]
The rear fender 138, the license plate support stay 204 and the blinker stay 143 are members which are respectively bent in a convex shape in the rearward direction of the vehicle to form convex bent portions 138c, 204c, 143c thus obviating the interference with the rear wheel 122. By arranging the rear fender 138, the license plate support stay 204 and the blinker stay 143 closer to the front portion of the vehicle, a total length of the motor cycle can be reduced. [0052]
As shown in Fig. 2, Fig. 4 and Fig. 7(a), (b) described above, the present invention is characterized in that in the motorcycle 10 (see Fig. 1) in which the seat load which acts on the seat 16 is received by the cross plate 151 mounted on the rear portion of the vehicle body, the raised portion 162 is formed by raising the cross plate 151 behind the center inclined portion 161 which constitutes the first load receiver which is mounted on the cross plate 151, and the rear seat load receiver 162a which constitutes the second load receiver is mounted on the raised portion 162. [0053]
Since the rear seat load receiver 162a is formed on the
raised portion 162 which is formed behind the center inclined portion 161, when the rider and the pillion sit on the seat 16, the load (seat load F2) which acts on the seat 16 can be received by the center inclined portion 161 and the rear seat load receiver 162a. Particularly, the sinking of the rear portion of the seat can be restricted by the rear seat load receiver 162a. Further, for example, it is unnecessary to form the large gap C (see Fig. 2) between the seat 16 and the rear cover 144 which constitutes the vehicle body cover by taking the sinking of the seat 16 into consideration and hence, it is possible to enhance the appearance of the rear portion of the vehicle.
[Industrial Applicability] [0055]
The seat support structure of the present invention is preferably applicable to the motorcycle. [Description of Reference Numerals and Signs] [0056]
10: motorcycle, 16: seat, 87: grab rail, 151: cross member (cross plate), 154: hook, 156: rubber (rubber plate), 157a: inserting portion, 161: first load receiver (center inclining portion), 162: raised portion, 162a: second load receiver (rear seat load receiver), 162b: back surface, 164: regulator, 165: engaging portion, 166d, 167d: third load receiver (load receiving flat portion)

[Designation of Document] Claims [Claim 1]
A seat support structure of a motorcycle in which a seat load which acts on a seat is received by a cross member mounted on a rear portion of a vehicle body, wherein
a raised portion is formed by raising the cross member behind a first load receiver which is mounted on the cross member, and a second load receiver is mounted on the raised portion. [Claim 2]
A seat support structure of a motorcycle according to claim 1, wherein an inserting portion is formed on a lower portion of the seat in a projecting manner, an engaging portion which is engaged with the inserting portion is mounted on the cross member, and the engaging member is configured such that a gate-shaped hook is mounted on the cross member and a rubber is arranged below the hook. [Claim 3]
A seat support structure of a motorcycle according to claim 1 or claim 2, wherein a regulator is mounted on a back surface of the raised portion. [Claim 4]
A seat support structure of a motorcycle according to claim 1, claim 2 or claim 3, wherein grab rails are mounted on the cross member and third load receivers which receive a
Seat load are mounted on the grab rails.
5. A seat support structure of a motorcycle substantially as hereinbefore described with reference to the accompanying drawings.

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=7NMTNyw2Cfv0QFiOfBnRYw==&loc=+mN2fYxnTC4l0fUd8W4CAA==

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Patent Number

279172

Indian Patent Application Number

2712/DEL/2005

PG Journal Number

03/2017

Publication Date

20-Jan-2017

Grant Date

13-Jan-2017

Date of Filing

10-Oct-2005

Name of Patentee

HONDA MOTOR CO., LTD.

Applicant Address

1-1, MINAMIAOYAMA 2-CHOME, MINATO-KU, TOKYO, JAPAN.

Inventors:

#	Inventor's Name	Inventor's Address
1	TOSHIO IGARASHI	C/O KABUSHIKI KAISHA HONDA GIJUTSU KENKYUSHO, OF 4-1, CHUO 1-CHOME, WAKO-SHI, SAITAMA, JAPAN.
2	HIROAKI MATSUURA	C/O KABUSHIKI KAISHA HONDA GIJUTSU KENKYUSHO, OF 4-1, CHUO 1-CHOME, WAKO-SHI, SAITAMA, JAPAN.

PCT International Classification Number

B62J 1/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	2004-376808	2004-12-27	Japan