Title of Invention

"A RICE TRANSPLANTER"

Abstract A rice transplanter comprising: a transplanting frame (20) for driving rice transplanting pawls (17); and a seedling feeding member (58) connected to the transplanting frame (20) through a seedling feeding case (59). The seedling feeding member (58) has a longitudinal feed camshaft (65) formed on one side and a transverse feed threaded shaft (66) formed on the other side, and these camshaft (65) and threaded shaft (66) are arranged on the right and left sides across the center of the transplanter body, to improve the two side weight balances of a transplanting portion (15) thereby to keep the transplanting precision stable. The longitudinal feed cams (116) of the longitudinal feed camshaft 65 and the slide blocks (114) of the transverse fee...
Full Text Field of the Art
The present invention relates to a rice transplanter comprising seedling racks and rice transplanting pawls for continuously performing rice transplanting work.
Background Art
Conventionally, for example, in a rice transplanter according to Japanese Publication Number 2000-41429, an imbalance of the right and left planting portions results in poor balance of the rolling weight because the seedling rack drive case, slide block of the seedling feeding shaft, and the slide block receiver are arranged in a manner deviating to one side from the body center.
In a construction where such a slide block slides close to the body center, it is difficult to perform maintenance on the slide block and the slide block receiver because of the hitch member for connecting the planting portion to the machine side.
For example, in Japanese Utility Model Registration Number 2548430 and Japanese Publication Number 2000-41429, a means for transversely feeding the seedling rack by transmitting revolutions of a transplanting drive shaft in a transplanting frame to a transverse feed shaft through a transverse feed case is described. In this invention, the problems are that the transverse feed speed can be changed only by changing the intermeshing of gears in the transverse feed case, it takes a long time, and gears and shafts must always be removed for required maintenance because the gears and the shafts remain in the transplanting side even after the case cover is removed. In the transverse feed case, the gears and shafts remain in the transplanting side when only the case cover is removed. Therefore, the removal of gears and shafts is always required when performing maintenance on the gears, leading to the inconvenience of difficult maintenance.
In the aforementioned Japanese Publication Number 2000-41429, a transverse feed gear case (transverse feed case) for transmitting revolutions of a transmission shaft in a transverse connecting pipe to the transverse feed shaft is arranged in such a way that the case is exposed to one side of the transplanting portion, and a seedling picking amount adjusting lever is arranged in a position closer to the inside than the transverse feed case. Therefore, the gear case may be damaged due to interference with obstacles or may catch
foreign material during work. In addition, when the gear case is provided with a changeover lever for changing the transverse feed speed, foreign material may be caught by the changeover lever, leading to improper operation.
In the aforementioned Japanese Publication Number 2000-41429 and Japanese Utility Model Registration Number 2588523, a means for providing right and left line drawing markers in a raisable manner on a lower fulcrum shaft of a transplanting transmission frame for supporting a float is described. When the lower fulcrum shaft is rotated to change the float supporting height at the time of adjusting the transplanting depth, problems arise where the mounting angle of the right and left line drawing markers changes each time, and the marker may interfere with the seedling racks or the fertilizer distributor provided to the machine and may be damaged depending on the mounting angle of the right and left line drawing markers. When the marker is connected to and held by the fulcrum shaft and the marker is folded for entrance from a working position into an accommodating position, the operator may be exposed to soil splashed by the marker because the marker is accommodated in a manner inclining forward. The transverse feed gear case (transverse feed case) for transmitting revolutions of the transmission shaft in the transverse connecting pipe to the transverse feed shaft is arranged in a manner such that the case is exposed to the side of the transplanting portion. Therefore, the gear case may be damaged due to interference with obstacles during work.
Summary of the Invention
This invention relates to a rice transplanter comprising transplanting frame 20 for driving rice transplanting pawls 17, seedling feeding member 58 connected to the transplanting frame 20 through the seedling feeding case 59, wherein the seedling feeding member 58 has a longitudinal feed camshaft 65 formed on one side and a transverse feed threaded shaft 66 formed on the other side, and camshaft 65 and threaded shaft 66 are arranged on the right and left sides across the center of the transplanter body to improve the weight balance of the two sides of the transplanting portion 15 thereby keeping the transplanting precision stable. Moreover, longitudinal feed cams 116 of the longitudinal camshaft 65 and the slide blocks 114 of the transverse feed threaded shaft 66 are arranged on the right and left sides across the body center to facilitate their maintenance.
Both ends of the transverse feed threaded shaft 66 are connected to and supported by the transplanting frame 20, and both ends of the longitudinal feed camshaft 65 are supported by the threaded shaft 66 and the seedling feeding case 59. Therefore, the seedling feeding case 59 and the transverse feed threaded shaft 66 are supported by the transplanting frame 20 with precision, and the longitudinal feed camshaft 65 is supported
by both ends of the seedling feeding case 59 and the threaded shaft 66; thereby, the precision of the transverse feed of the seedling racks 16 and longitudinal feed of seedling can be improved.
The seedling feeding case 59 is formed nearly into an L-shape by the transverse case portion 59b connected to the transplanting frame 20 and the vertically arranged longitudinal case portion 59a. Furthermore, the longitudinal feed camshaft 65 is extended toward the inside from the longitudinal case portion 59a, and the longitudinal feed cam 116 is located in a space having a shape like a one-sided open square formed by the seedling feeding case 59 and the camshaft 65. Therefore, the transverse width of the seedling feeding case 59 and the longitudinal feed camshaft portion is reduced, and these can be incorporated in a compact manner and degree of freedom in arranging other parts or the varieties of designs for the machine can be increased.
The transplanter comprises the transplanting case 20 for driving the rice transplanting pawls 17 and the seedling feeding case 59 arranged on either the right or left side of the transplanting frame 20 for driving the seedling feeding shaft 58, wherein the seedling feeding case 59 is formed nearly into an L-shape by the transverse case portion 59b connected to the transplanting frame 20 and the longitudinal case portion 59a connected to the transverse feed shaft 66. Furthermore, the longitudinal case portion 59a and the transverse case portion 59b are provided with the speed change mechanism 64 for changing seedling feeding speed and the changeover mechanism 131 for changing over the speed change mechanism 64, respectively. Therefore, the seedling feeding speed can be easily changed by the seedling feeding case 59 provided at low cost and in a compact manner, the space around the seedling feeding case 59 is well secured, and the degree of freedom in design and in arranging accessory parts is increased. In addition, the seedling feeding case 59 is easily removed while leaving the speed change mechanism 64 and the changeover mechanism 131 in the case 59, thereby maintainability of the speed change mechanism 64 and the changeover mechanism 131 can be improved.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17, frame joints 48a and 48b for connecting and fixing the transplanting frame 20, and the seedling feeding case 59 for driving the seedling feeding shaft 58 for transverse and longitudinal feed of seedlings, wherein the mounting portion 60 for mounting and fixing the seedling feeding case 59 is provided to one side of the frame joint 48a, and a joint fitting portion 124 fitting to the exterior of the frame joint 48a protruding from the mounting portion 60 is provided to an internal surface of one side of the seedling feeding case 59. Therefore the seedling feeding case 59 can be integrally and easily mounted to and removed from the transplanting portion side while leaving the
changeover gears 62 and 63 and the changeover mechanism 131 in the seedling feeding case 59, thereby mounting accuracy of the seedling feeding case 59 and maintainability of the seedling feeding speed change mechanism 64, including the changeover gears 62 and 63 and the changeover mechanism 131 can be improved.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17, the seedling feeding case 59 arranged on either the right or left side of the transplanting frame 20 for driving the seedling feeding shaft 58, and the seedling picking amount adjusting member 88, which adjusts the amount of picking from the seedling racks 16, wherein the tip of the adjusting member 88 is protruded forward from the rear of the seedling feeding case 59 while detouring to the side. Therefore, durability of the transverse feed case 59 is improved by protecting the exterior of the seedling feeding case 59 with the seedling picking amount adjusting member 88. In addition, the seedling picking amount adjusting member 88 is formed nearly into an L-shape by integrally combining the transverse shaft portion 88a serving as a transverse member and the longitudinal shaft portion 88b serving as a longitudinal member, thereby reducing the number of parts to form the seedling picking amount adjusting member 88 in a simple structure in order to facilitate assembling work and reduce costs.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17, the seedling feeding case 59 arranged on either the right or left side of the transplanting frame 20 for driving die seedling feeding shaft 58, and a marker supporting member 77 for supporting right and left line drawing markers 76 in a foldable manner, wherein one side of the marker supporting member 77 is fixed to the transplanting frame 20, the other side of the member is formed by folding toward the exterior of the machine, and a folding portion 77b of the marker supporting member 77 is arranged at the front section of the seedling feeding case 59. Therefore, it is not necessary to change the supporting angle of the marker 76 for each adjustment of the transplanting depth as in conventional machines. When accommodating the marker 76, there is no inconvenience such that the marker 76 contacts the seedling racks 16 and a fertilizer distributor 36 provided to the machine. In these conditions, the marker 76 is built in the transplanting portion 15 in a compact manner to reduce the longitudinal length of the machine and to improve the longitudinal balance of the machine body, the marker 76 is accommodated in an upright posture in a degree higher than the conventional machine, and when accommodating the marker, soil adhering on the marker 76 is prevented from splashing toward workers. Furthermore, the front side of the seedling feeding case 59 is protected by the marker supporting member 77 in order to prevent damage to the seedling feeding case 59 and to improve durability of the case.
The seedling feeding case 59 is arranged between the protecting member 74 provided to one end of the float supporting member 67 and the marker supporting member 77. Therefore, die seedling feeding case 59 is protected by the protecting member 74 and the marker supporting member 77 at the front and rear sides, and die seedling feeding case 59 can be mounted without damage. In addition, when the seedling feeding case 59 is provided with the changeover lever 138 for changing the seedling feeding (transverse feed) speed, problems of foreign material caught by the changeover lever 138 are eliminated to enable prevention of incorrect operation of the changeover lever 138.
Brief Description of the Drawings
Fig. 1 is a general side view of a rice transplanter;
Fig. 2 is a general plan view of the rice transplanter;
Fig. 3 is a side view of a transplanting portion;
Fig. 4 is a plan view of the transplanting portion;
Fig. 5 is a plan view explaining the transplanting portion;
Fig. 6 is a schematic front view of die transplanting portion;
Fig. 7 is a front view of a transplanting frame;
Fig. 8 is a side view of die transplanting frame;
Fig. 9 is a horizontal sectional view of the transplanting frame;
Fig. 10 is a left plan view of me transplanting frame;
Fig. 11 is a right plan view of the transplanting frame;
Fig. 12 is a sectional view explaining the transplanting frame;
Fig. 13 is a perspective view explaining the transplanting frame;
Fig. 14 is a view explaining a seedling pick up portion;
Fig. 15 is a sectional view explaining a seedling feeding case;
Fig. 16 is a view explaining a speed change shaft portion;
Fig. 17 is a view explaining a changeover mechanism;
Fig. 18 is a view explaining a transplanting pawl unit clutch portion;
Fig. 19 is a view explaining die appearance of the transplanting pawl unit clutch portion; and
Fig. 20 is a view explaining the side bumper portion.
The Best Mode of Embodiment of the Invention
Now some embodiments of die present invention will be described wim reference to me drawings. Fig. 1 is a general side view of a ride-on rice transplanter, Fig. 2 is a plan view of the same, and item 1 in the drawing is a vehicle boarded by a worker, wherein an
engine 2 is mounted on the vehicle frame 3, rice field traveling front wheels 6 are supported by the front section of a longitudinally elongated transmission case 4 through the front axle case 5, and rice field traveling rear wheels 8 are supported by the rear axle case 7 of the rear section of the aforementioned transmission case 4. Furthermore, both ends of the bonnet 9 covering the aforementioned engine 2 and so on are equipped with the spare seedling racks 10, the aforementioned transmission case 4 is covered by the body cover 11 of the vehicle boarded by the worker, the driver's seat 13 is installed on the top of cab 12 at the rear side of the aforementioned body cover 11, and the rear portion of the aforementioned bonnet 9, namely the front section of the driver's seat 13, is provided with the steering wheel 14.
Item 15 in the drawing is a transplanting portion equipped with seedling racks 16 for transplanting in four ridges, a plurality of rice transplanting pawls 17, and the forward inclining seedling racks 16 made of synthetic resin with high front and low rear portions is supported by transplanting frame 20 through the lower rail 18 and the guide rail 19 in a manner capable of reciprocating and sliding in the right and left directions. The rotary case 21, which rotates at constant speed in one direction, is supported by the aforementioned transplanting frame 20, a pair of pawl cases 22 and 22 are symmetrically arranged across the rotating shaft center of the case 21, and the rice transplanting pawls 17 and 17 are installed at ends of the pawl cases 22 and 22. Right and left side frames 23 and 23 are vertically mounted to the right and left ends of the aforementioned transplanting frame 20 to support the seedling racks 16. Hitch brackets 24 located at the right and left centers of the transplanting frame 20 are connected to vehicle 1 through the elevating link mechanism 27, including the top link 25 and the lower link 26, the hydraulic elevating cylinder 28 provided to vehicle 1 is connected to the lower link 26, and the transplanting portion 15 is elevated through the link mechanism 27 at the time of driving the elevating cylinder 28. At the time of lowering the transplanting portion 15, the seedlings are taken out by the transplanting pawls 17 from the seedling racks 16, reciprocating and sliding in the right and left directions to enable continuous rice transplanting work.
In the drawing, item 29 is a main speed change lever, item 30 is a seedling supply lever enabling operation such as travel stop not only in the boarding position of the vehicle but also in a position for exiting the vehicle, item 31 is a transplanting elevating lever, item 32 is a main clutch pedal, items 33 and 33 are right and left braking pedals, item 34 is a central float for leveling two ridges, item 35 is a side float for leveling one ridge, item 36 is a side ridge fertilizer distributor for four ridges, and items 37 and 37 are auxiliary wheels arranged on external sides of the rear wheels 8.
The aforementioned fertilizer distributor 36 comprises a fertilizer hopper 38 for containing fertilizer, a fertilizer dispensing case 39 serving as a fertilizer dispensing portion for feeding fertilizer, a turbo blower type blower 42 for discharging fertilizer to a side ridge forming device 40 of floats 34 and 35 through the flexible type conveying hose 41, and the cylindrical air tank 43, wherein the blower 42 is mounted to the right end of the air tank 43, the fertilizer dispensing cases 39 for four sets, namely for four ridges, are arranged on the top of the air tank 43, and the top end of the aforementioned seedling racks 16 are closely arranged on the rear side of the fertilizer hopper 38.
As shown in Fig. 3 through Fig. 12, the aforementioned transplanting frame 20 comprises right and left longitudinal frames 44a and 44b made from a pipe for two ridges each and a transverse frame 45 made from a pipe for connecting the front ends of the right and left longitudinal frames 44a and 44b, wherein a cross shaped frame joint (cross pipe joint) 46 formed by bulge processing is fixed to each tip of the longitudinal frames 44a and 44b by welding, and the aforementioned rotary case 21 is supported by the joint 46 through a rotating shaft 47. Right and left cross shaped frame joints (cross pipe joints) 48a and 48b formed by bulge processing are fixed to the longitudinal frames 44a and 44b and the transverse frame 45 by welding; thus, these longitudinal and transverse frames 44a, 44b and 45 are integrally coupled to form the light weight transplanting frame 20 at low cost.
The transplanting input shaft 49 is provided to the front end portion of the right frame joint 48b to transmit driving force from the PTO shaft of the aforementioned transmission case 4 to the input shaft 49 through the universal joint shaft 50. The input shaft 49 is coupled to the transplanting drive shaft 51 provided inside the transverse frame 45 through bevel gears 49a and 52. The transplanting pawl drive shaft 53 provided inside the right and left longitudinal frames 44a and 44b is coupled to the transplanting drive shaft 51 through the bevel gears 52 and 54 and the safety clutch 55, and the transplanting pawl drive shaft 53 is coupled to the aforementioned rotating shaft 47 through the bevel gears 56a and 56b and the transplanting pawl unit clutch 57 to drive the rice transplanting pawls 17.
The seedling feeding shaft 58 for transversely feeding the seedling racks 16 in right and left directions and longitudinally feeding seedlings on the seedling racks 16 is coupled to the left end of the transplanting drive shaft 51 through the seedling feeding case 59 made of aluminum die cast, wherein the flange portion 61 at one end of the seedling feeding case 59 is fixed by screws to the flange portion 60 serving as the left end installing portion of the left frame joint 48a, the left end of the seedling feeding shaft 58 is inserted to and supported by other end of the case 59, the speed change mechanism 64
comprising two sets of changeover gears 62 and 63 for changing speed from high to low or vice versa is arranged between the drive shaft 51 and the seedling feeding shaft 58 inside the case 59, and the left half and the right half of the seedling feeding shaft 58 are arranged to the longitudinal seedling feeding camshaft 65 and the seedling rack transverse feed threaded shaft 66 respectively across an approximate center of the machine body in order to perform transverse feed of the seedling racks 16 and longitudinal feeding of seedlings on the seedling racks 16 at the time of rotational drive of the seedling feeding shaft 58 at the two (high and low) speeds.
As shown in Fig. 10 and Fig. 11, the transplanting depth adjusting fulcrum shaft 67 is supported by the lower side of the front end of the aforementioned transplanting frame 20, and brackets 68 and 69 on the top of the rear end of floats 34 and 35 are connected to the aforementioned fulcrum shaft 67 through transplanting depth adjusting links 70 and 71. Thus, the change of the float inclining angle (transplanting depth) is detected by the elevating link 72 connected to the front end of the central float 34. The reference transplanting depth can be adjusted by the transplanting depth adjusting lever 73 of which the base end is fixed to the aforementioned fulcrum shaft 67.
The L-shaped right and left side bumpers 74 protruding outwards are mounted on the right and left ends of the aforementioned fulcrum shaft 67 through the mounting member 75 in a foldable manner.
As shown in Fig. 8, Fig. 10 and Fig. 11, the base of the right and left marker supporting stays 77 for supporting the right and left line drawing markers 76 in a foldable manner (upwards and downwards) is secured by welding on external top surfaces of right and left frame joints 48a and 48b. The stay 77 is formed with an L-shaped pipe, and the longitudinal stay 77a in the front and rear direction is fixed by welding the approximate midpoints of joints 48a and 48b in a manner being in line contact with the longitudinal surface at approximately the same height. Transverse stay portions 77b are protruded right and left outwards in front of the longitudinal frames 44a and 44b, the marker 76 is supported by marker arms 79 on the mounting shaft 78 at the tip of the transverse stay portion 77b in a foldable manner, and the transverse stay portion 77b of the left stay 77 is positioned in front of the seedling feeding case 59 to protect the case 59.
As shown in Fig. 13, the aforementioned supporting stay 77 has a base end of the longitudinal stay portion 77a fixed by welding on the internal side surfaces of reinforcing members 80 and 81 for forming the base ends of the right and left side frames 23 and 23 on the sides of the joints 48a and 48b, thereby the supporting strength of the side frames 23 and the stay 77 is improved.
As shown in Fig. 14, the seedling picking adjusting plate 83 that moves the seedling
pick up plate 82 at the lower end of the seedling racks 16 up and down to adjust the seedling amount is supported by the guide member 84 of the transplanting frame 20 through the guide rod 85 in a movable up and down manner. The engaging plate 87 engaged with the hook 86 of the adjusting plate 83 is provided to the seedling picking amount adjusting shaft 88 in the right and left direction. The seedlings picked by the rice transplanting pawls 17 are adjusted by operating the seedling picking amount adjusting lever 89 connected to the left end of the seedling picking amount adjusting shaft 88. Both the right and left ends of the transverse shaft portion 88a of the seedling picking amount adjusting shaft 88 are supported by the bearing plate 90 fixed to the seedling feeding case 59 and the aforementioned right reinforcing member 81. The left end of the transverse shaft portion 88a is formed on the longitudinal shaft portion 88b by folding forward at approximately 90° at a position closer to the outer side than the seedling feeding case 59, and the front end of the longitudinal shaft portion 88b is formed on a lever mounting portion 88c by folding inside at approximately 90° in front of the seedling feeding case 59. The base end of the L-shaped adjusting lever 89 is fixed with two screws 91 on the mounting portion 88c. The tip of the lever 89 is diagonally extended through a lever guide to the upper front to come between the left rear wheel 8 and the auxiliary wheel 37. The seedling feeding case 59 is protected surrounded by portions 88a, 88b, and 88c, and the aforementioned conveying hose 41 is positioned in the clearance 93 between the case 59 and the seedling picking amount adjusting shaft 88.
The aforementioned hitch bracket 24 is provided with upper and lower link shafts 94 and 95 that couple the top link 25 and the lower link 26. A fulcrum member 96 fixed by welding approximately in the middle of the transverse frame 45 of transplanting frame 20 is coupled to the lower end of the bracket 24 through a rolling fulcrum shaft 97. A hydraulic rolling cylinder 99 is mounted on a mounting seat 98 at the top of the bracket 24 to connect the tip of the piston rod 100 of the cylinder 99 to the fixing bracket 101 at the upper end of the right side frame 23. The gear pump 102 for reciprocating the aforementioned double action cylinder 99, the reversible electric motor 103 for reversibly driving the pump 102, and the oil tank 104 are integrally provided. A rolling correction spring 106 is provided between the receiving plate 105 fixed on the top of the aforementioned mounting seat 98 and the right and left end brackets on the back side of the seedling racks 16. When the inclination of the transplanting portion 15 is detected by the pendulum type rolling sensor 108 provided on the sensor table 107 of the transverse frame 45 on the left side of the hitch bracket 24, the piston rod 100 of the cylinder 99 is moved forward and backward to swing the transplanting portion 15 right and left around the fulcrum shaft 97 in order to keep the transplanting portion 15 horizontal.
The bracket 109 fixed by welding to the aforementioned transverse frame 45 and the right end of the fulcrum member 96 is provided, and the bracket 109 and bracket 101 at the top end of the right side frame 23 are connected and reinforced by the diagonal stay 110 in order to improve the rigidity of the right side frame 23 by applying the lightest weight structure and to secure satisfactory rolling performance.
The approximate midpoint of seedling feeding shaft 58 is supported by the aforementioned bracket 109, and both ends of the aforementioned transverse feed threaded shaft 66 are supported between the bearing plate 111 fixed on the right supporting stay 77 and the bracket 109 through the bearing 112. The right end of the aforementioned camshaft 65 is coupled to and supported by the left side of the threaded shaft 66 through the joint 113, and the left end to the seedling feeding case 59. The longitudinal feed camshaft 65 and the threaded shaft 66, which are divided in the right and left, are provided with both ends supported to enhance strength. The right end of the longitudinal feed camshaft 65 is coupled to the threaded shaft 66 coaxially to improve the precision of the longitudinal feed. The aforementioned camshaft 65 is made from a steel pipe and the threaded shaft 66 a solid steel rod. Thus, the aforementioned seedling feeding case 59 and the camshaft 65 are arranged on the right side, and the heavy threaded shaft 66 arranged on the left side across the body center to optimize the right and left balance.
The slide block 114 is engaged with the aforementioned threaded shaft 66 by threads and connected to the seedling racks 16 through the slide block receiver 115 to allow the seedling racks 16 to reciprocate in the right and left direction as the threaded shaft 66 rotates in one direction. The right-left longitudinal feed cam 116 is provided to the aforementioned longitudinal feed camshaft 65. When the seedling racks 16 move either to the right or left stroke end, the longitudinal feed cam 116 contacts the cam follower 117 to rotate the longitudinal roller shaft 119 in one direction through the one-direction clutch 118; thereby, the longitudinal feed belt 123 running on the longitudinal feed rollers 121 and 122 of a pair of the upper and lower roller shafts 119 and 120 provided on the bottom of the seedling racks 16 will move down by one plant.
As shown in Fig. 15 through Fig. 17, the frame joint 48a coupled to the aforementioned seedling case 59 has the flange portion 60 for mounting and fixing the seedling feeding case 59 at one end of the frame joint 48a and the joint fit portion 124 fitted to the external end of the frame joint 48a protruding to some extent from the flange portion 60 at an internal surface of one side of the seedling feeding case 59. The tapered surface 125 is formed at the external end of the fitting portion 124, and the O-ring 126 is provided between the tapered surface 125 and the coupling 48a, thereby air-tightness
between the joint 48a and the case 59 can be achieved in a simple construction and at low cost when the flange portions 60 and 61 are fastened with screws 127.
The aforementioned seedling case 59 is provided with a speed change shaft 128 separately from the transplanting drive shaft 51, the spline hole 129 is provided inside the aforementioned bevel gear 52, and the left end of the drive shaft 51 and the right end of the speed change shaft 128 are fitted with the spline hole 129 to integrally couple the drive shaft 51 and the speed change shaft 128; thereby, the speed change shaft 128 can be easily removed together with the seedling feeding case 59.
A bearing 130 is provided between the aforementioned joint 48a and the bevel gear 52; thereby, the bevel gear 52 is supported by the one end of the joint 48a. The flange portion 60 is fixed by welding on the outer surface of the joint 48a positioned closer to the external side than the position of the bearing 130. The inside diameter "a" of the fitting surface of the joint 48a fitted with the bearing 130 is formed to be greater than the inside diameter "b" of the inner surface of the joint 48a on which the flange portion 60 is welded (a The aforementioned seedling case 59 is formed into an L-shape comprising the longitudinal case portion 59a and the transverse case portion 59b, the flange portion 61 is provided to the right end of the transverse case portion 59b, the speed change mechanism 64 comprising the changeover gears 62 and 63 is built in the longitudinal case portion 59a, and the speed changeover mechanism 131 is built in the transverse case portion 59b. The aforementioned changeover gears 62 and 63 are equipped with the drive gears 62a and 63a supported in an idly rotatable manner on the speed change shaft 128 and the driven gear 62b and 63b fixed by the joint to the left end of the longitudinal feed cam 65. The aforementioned changeover mechanism 131 comprises the shift key 135 which is embedded in the keyway 128 of the speed change shaft 128 and of which the end is selectively engaged to the keyway 134 of the gears 62a and 63 a by the force of the sheet spring 133 and the changeover lever 138 connected to the shift key 135 through the shift ring 136 and the shifter 137, wherein the left end operating portion 138a of the changeover lever 138 is protruded to the forward side of the left exterior of the seedling feeding case 59. Consequently, the two-stage (high and low) transverse feed speed can be changed over by pushing and pulling the changeover lever in the right and left directions.
In the aforementioned changeover gears 62 and 63, the gears 62a and 63 a of the side engaging the shift key 135 are made of metal, such as steel, and the gears 62b and 63b of the other side are made of synthetic resin, thereby reducing the weight and improving durability.
As shown in Fig. 18 and fig- 19, in the aforementioned transplanting frame 20, the bevel gears 49a, 52 and 54 are built in the frame joints 48a and 48b at the front side of the frame in a compact manner, arid the bevel gears 56a and 56b and the transplanting pawl unit clutch 57 are built in the frame joint 46 at the rear side to simplify structure and reduce cost. As to the transplanting pawl unit clutch 57, a fixing clutch portion 139 is formed in the bevel gear 56b {Supported by the rotating shaft 47 in a floatable manner, a movable clutch portion 141 is formed in a slider 140 spline-fitted to the rotating shaft 47 in a transversely slidable manner, and in normal conditions, the slider 140 is pressed by a clutch spring 142 to couple clutch portions 139 and 141. Furthermore, the frame joint 46 is provided with the clutch operating member 143 for moving back the slider 140 against the force of the spring 142 in a retractable manner, and the operating member 143 is connected to the unit clutch lever (not illustrated) at the rear side of the seedling racks 16 through the lever 144; thereby, the transplanting pawl unit clutch 57 can be engaged or disengaged by operating the clutch lever.
As shown in Fig. 20 (1) and (2), in the aforementioned side bumper 74, the vertical bumper folding portion 74a is inserted in the mounting member 75 shaped in a one-sided open square viewed from the side fixed to both ends of the fulcrum shaft 67 in a vertically movable manner, and the compression spring 146 is provided between the spring seat 145 and the mounting member 75 of the vertical portion 74a protruded downward from the mounting member 75. A position regulating plate 147 shaped in L in contact with a left end surface and a front surface of the mounting member 75 is fixed to the vertical portion 74a, the mounting member 75 is provided with the stopper portion 148 for preventing the regulating plate 147 from swinging backward, and in a position where the regulating plate 147 is in contact with the left end surface of the mounting member 75, a horizontal portion of bumper 74b is protfuded in the extension direction of the fulcrum shaft 67 to protect the seedling pick up plate 82. On the other hand, the bumper 74 is pulled upward against the spring 146 to turn the horizontal portion 74b at approximately 90 degrees, and body width is reduced at the time the regulating plate 147 is in contact with the front surface of the mounting member 75 in a bumper accommodating position in order to facilitate loading to and accommodation in a transporting vehicle.
By the way, two shafts 65 and 128 are provided in the aforementioned seedling feeding case 59 to cover the speed change mechanism 64 and the changeover mechanism 131 constituted by two sets of the changeover gears 62 and 63 and the shift key 135. Therefore the case is formed £t a reduced cost of a mold with a compactness and light weight and the case cover 150 fixed to the case body through screws 149 at the left side portion can be removed to facilitate replacement and inspection of the gears 62 and 63 to
improve maintainability.
When the transverse case portion 59b is formed into an extended shape, the distance between the longitudinal case portion 59a and the flange portion 61 is increased, and tools are used for installing and removing screws 127. The tools can be easily inserted to the position of the screws 127 to facilitate installation and removal of the case 59.
As mentioned above, the transplanting portion 15 has the transplanting frame 20 constituted by pipe frames to simplify the construction and reduce weight, and comprises the transplanting frame 20 for driving the rice transplanting pawls 17 and the marker support member 77 serving as a marker support stay for supporting the right and left line drawing markers 76 in a foldable manner, wherein the rear end of the marker support stay 77 is fixed to the transplanting frame 20 and the tip side is folded toward the exterior of the body. Therefore, it is not necessary to change the support angle of the marker 76 at each transplanting depth adjustment as conventional machines, the inconvenience that the marker 76 is in contact with the seedling racks 16 and the fertilizer distributor 36 serving as a fertilizing portion provided to the machine at die time of accommodating the operation is eliminated, and the marker 76 is built in the transplanting portion 15 in a compact manner to reduce longitudinal length of the machine body to improve the longitudinal balance of the body. Furthermore, the accommodating posture of the marker 76 is made to be closer to the upright position than conventional machines to prevent soil adhered on the marker 76 from splashing over workers during the marker accommodating operation and appropriate change of the folding position of the marker support stay 77 enables the common application of the transplanting frame 20 to other models and specifications to reduce costs.
The longitudinal line contact portion of the marker support stay 77 is fixed by welding to the external side of the frame joints 48a and 48b for connecting and fixing the transplanting frame 20 to strongly hold the marker support stay 77 on the external side of the frame joints 48a and 48b and to improve durability of the marker 76.
The marker support stay 77 is fixed to the side frame 23 supporting the seedling racks 16 and reinforcing members 80 and 81 of the frame joints 48a and 48b to strongly fix the marker support stay 77 to the frame joints 48a and 48b without providing special reinforcing members as marker support members in order to improve the strength of the support stay 77 in a light weight and low cost manner.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17, the seedling feeding case 59 arranged on either the right or left side of the transplanting frame 20 for driving the seedling feeding shaft 58, and the marker support stay 77 for supporting the right and left line drawing markers 76 in a
foldable manner, wherein the rear end of the marker support stay 77 is fixed to the transplanting frame 20, the front end is folded toward the exterior of the machine body, and the transverse stay portion 77b serving as the folding portion of the marker support stay 77 is arranged at the forward position of the seedling feeding case 59. Therefore it is not necessary to change the support angle of the marker 76 at each transplanting depth adjustment as in conventional machines, the inconvenience that the marker 76 is in contact with the seedling racks 16 and the fertilizer distributor 36 provided to the machine at a time of accommodating operation is eliminated, and the marker 76 is built in the transplanting portion 15 in a compact manner to reduce longitudinal length of the machine body to improve the longitudinal balance of the body. Furthermore, the accommodating posture of the marker 76 is made to be closer to the upright position than conventional machines to prevent soil adhered on the marker 76 from splashing over workers at the marker accommodating operation and appropriate change of a folding position of the marker support stay 77 enables the common application of the transplanting frame to other models and specifications to reduce costs. Moreover, the forward section of the seedling feeding case 59 is protected by the marker support stay 77 to prevent damage to the seedling feeding case 59 to improve durability.
The seedling feeding case 59 is arranged between the side bumper 74 serving as a protecting member provided at the end of the fulcrum shaft 67 used as a float supporting member and the marker support stay 77 to protect the front and rear sections of the seedling feeding case 59 with the bumper 74 and the marker support stay 77 in order to enable the arrangement of the seedling feeding case 59 in a good condition without damaging it. When the seedling feeding case 59 is provided with the changeover lever 138 for changing over the transverse feed speed, the possibility that foreign material is caught by the changeover lever is eliminated to prevent improper operation of the changeover lever 138.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17, the frame joints 48a and 48b for connecting and fixing the transplanting frame 20, and the seedling feeding case 59 for driving the seedling feeding shaft 58 performing transverse and longitudinal seedling feed, wherein the flange portion 60 for mounting and fixing the seedling feeding case 59 is provided to one end of the frame joint 48a, and the indented fit portion 124 which fits with an external end of the frame joint 48a protruded from the flange portion 60 is provided to an internal surface on one side of the seedling feeding case 59. Thus, it is possible to easily install and remove the seedling feeding case 59 from the transplanting portion in an integral manner while leaving the gears 62 and 63 for changing over the transverse feed speed and the
changeover mechanism 131 in the seedling feeding case 59, in order to improve the mounting accuracy of the seedling feeding case 59 and to improve maintainability of the transverse feed speed change mechanism 64, including the changeover gears 62 and 63 and the changeover mechanism 131.
The bearing 130 serving as a bearing member for supporting the drive shaft 51 used as a drive member in the transplanting frame 20 is provided to an internal surface of one end of the frame joint 48a, the flange portion 60 is fixed to the frame joint 48a at the external end of the bearing 130, and the inside diameter of the frame joint 48a in the position of the flange portion 60 side is made to be larger than that in the position of the bearing 130. Therefore, when the flange portion 60 is fixed to the frame joint 48a by welding, even if the frame joint 48a is deformed to a certain degree due to weld strain, the bearing 130 can be built with satisfactory accuracy without being affected by the deformation.
The tapered surface 125 serving as the tapered portion is formed on the internal surface of the flange portion 61 of the seedling feeding case 59 fixed to the flange portion 60, and the O-ring 126 is provided between the flange portion 60 (joint 48a) and the tapered surface 125 to simplify construction and reduce the cost in comparison with a conventional machine that uses an oil seal. Thus, even if the frame joint 48a is deformed due to weld strain, air tightness is secured and positioning of the seedling feeding case 50 can be easily and correctly performed utilizing the reaction force of the O-ring 126 against the tapered surface 125.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17 and the seedling feeding case 59 for driving the seedling feeding shaft 58 arranged on either the right or left side of the transplanting frame 20, wherein the seedling feeding case 59 is formed nearly into an L-shape by the transverse case portion 59b connected to the transplanting frame 20 and the longitudinal case portion 59a connected to the seedling feeding shaft 58. The longitudinal case portion 59a is provided with the speed change mechanism 64 for changing the transverse speed, and the transverse case portion 59b is provided with the changeover mechanism 131 for changing over the speed change mechanism 64. Thus, the transverse feed speed of the seedling racks 16 can be easily changed by the seedling feeding case 59 provided at low cost and in a compact manner. The space is well secured around the seedling feeding case 59, the degree of freedom of design and accessory installation is increased, and the case 59 can be easily removed while leaving the speed change mechanism 64 and the changeover mechanism 131 in the seedling feeding case 59, thereby, improving maintainability of the speed change mechanism 64 and the changeover mechanism 131.
The speed change mechanism 64 is constituted by a plurality of the changeover gears
62 and 63, the gears 62a and 63a of the side operated by the changeover mechanism 131 is made of metal, and the gears 62a and 62b intermeshing with the aforementioned gears are made of synthetic resin. Thus, the combination of the metal gear 62a and resin gear 62b and that of the metal gear 63a and resin gear 63b can achieve smooth rotation with low friction and reduce weight. In addition, the problem of insufficient strength of the gears 62a and 63a when the shifter 137 is used in the changeover mechanism 131 is solved, and the gears 62 and 63 can be kept compact to prevent enlargement of the size of the seedling feeding case 59.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17, the seedling feeding case 59 for driving the seedling feeding shaft 58 arranged on either the right or left side of the transplanting frame 20, and the seedling picking amount adjusting shaft 88 serving as a seedling picking amount adjusting member for adjusting a seedling picking amount of the seedling racks 16, wherein the tip of the seedling picking amount adjusting shaft 88 is protruded forward detouring the seedling feeding case 59 from the rear to the side. Thus, the exterior of the seedling feeding case 59 is protected by the seedling picking amount adjusting shaft 88 to improve durability of the seedling feeding case 59, and while the fertilizer distributing portion 36 is installed, the seedling picking amount adjusting shaft 88 is utilized as a guide member for the fertilizer distributing hose 41 to support the hose without damaging it.
In addition, the seedling picking amount adjusting member 88 is formed nearly into an L-shape by integrally combining the transverse shaft portion 88a serving as a transverse member and the longitudinal shaft portion 88b serving as a longitudinal member, thereby, reducing the number of parts and simplifying the construction to facilitate assembling work and reducing costs. Furthermore, a connecting portion of the transverse shaft portion 88a and the longitudinal shaft portion 88b can be formed into a curved shape to prevent foreign material from being caught.
The seedling picking amount adjusting shaft 88 can be supported by the reinforcing members 80 and 81 of the side frame 23 for supporting the seedling racks 16, thereby, reducing the number of parts of the supporting member supporting the seedling picking amount adjusting shaft 88 to simplify the construction and reducing costs.
The seedling picking amount adjusting lever 89 serving as a seedling picking amount adjustment operating member for adjusting the seedling picking amount of the seedling racks 16 is provided to the side of the transplanting portion 15, and the operating portion of the adjusting lever 89 is protruded toward the exterior of the rear wheels and simultaneously toward the front section of the machine body. Thus, the amount of twisting of the worker body at the driver's seat is minimized to improve operability of the
seedling picking amount adjusting lever 89 and to facilitate the operation by an arrangement which increases the degree of freedom for adjusting the swing angle of the seedling picking amount adjusting lever 89.
The seedling picking amount adjusting lever 89 is arranged between the rear wheels 8 and auxiliary wheels 37 located at the exterior of these wheels, thereby arranging the seedling picking amount adjusting lever 89 for effectively utilizing the limited space between the rear wheels 8 and the auxiliary wheels 37 to allow the lever to be easily built into the transplanting portion 15 in a compact manner.
The seedling picking amount adjusting lever 89 is arranged at one side of the rear wheels 8 and the transplanting depth adjusting lever 73 serving as the transplanting depth adjustment operating member for adjusting the transplanting depth is arranged at the other side across the rear wheels 8; therefore, these levers 73 and 89 to be operated during the work are closel> arranged on the same side of the body center to improve operability.
The transplanter comprises the transplanting frame 20 for driving the rice transplanting pawls 17 and the seedling feeding shaft 58 serving as the seedling feeding member connected to the transplanting frame 20 through the seedling feeding case 59, wherein the seedling feeding shaft 58 has the longitudinal feed camshaft 65 provided to one end and the transverse feed threaded shaft 66 to the other end, and these camshaft 65 and threaded shaft 66 are arranged on the right and left sides across the body center, thereby keeping right and left weight of the transplanting portion 15 well balanced to maintain rice transplanting precision. Furthermore, the longitudinal feed cam 116 of the longitudinal feed camshaft 65 and the slide block 114 of the transverse feed threaded shaft 66 are arranged on the right and left sides across the body center to facilitate maintenance of these elements.
Both ends of the transverse feed threaded shaft 66 are connected and supported by the transplanting frame 20, and both ends of the longitudinal feed shaft 65 are supported by the threaded shaft 66 and the seedling feeding case 59; thereby, the seedling feeding case 59 and the transverse feed threaded shaft 66 are accurately supported by the transplanting frame 20. Furthermore, the longitudinal feed camshaft 65 is supported by both ends of the seedling feeding case 59 and the threaded shaft 66 to improve the accuracy of transverse feed of the seedling racks 16 and the longitudinal seedlings feed.
The seedling feeding case 59 is formed nearly into an L-shape by the transverse case portion 59b connected to the transplanting frame 20 and the vertically arranged longitudinal case portion 59a, the longitudinal feed camshaft 65 is extended inward from the longitudinal case portion 59a, and the longitudinal feed cam 116 is located in the space having a shape like a one-sided open square formed by the seedling case 59 and the
camshaft 65, thereby reducing the lateral space width of the seedling feeding case 59 and the longitudinal feed cam portion to allow these parts to be assembled in a compact manner and to increase the degree of freedom for installation of other parts and design.





We claim:
1. A rice transplanter comprising a transplanting frame (20) for driving rice transplanting pawls (17), a seedling rack (16) supported by the transplanting frame (20) to reciprocate and slide in a right and left direction of the rice transplanter, and a seedling feeding shaft (58) connected to the transplanting frame (20) through a seedling feeding case (59), the seedling feeding shaft (58) having a transverse feeding threaded shaft (66) for transversely feeding the seedling rack (16) to reciprocate along the right and left direction, and a longitudinal feeding camshaft (65) for longitudinally feeding seedlings on the seedling rack (16), characterized in that longitudinal feeding camshaft (65) and the transverse feeding threaded shaft (66) are respectively positioned on the right and left sides with a body center in the width direction of the rice transplanter as a reference, and are coaxially to each other with being coupled to each other at opposing ends of the both shafts.
2. A rice transplanter as claimed in claim 1, wherein both ends of the transverse feeding threaded shaft (66) are connected and supported by the transplanting fame (20), and both ends of the longitudinal feeding camshaft (65) are supported by the transverse feeding threaded shaft (66) and the seedling feeding case (59).
3. A rice transplanter as claimed in either claims 1 or 2, wherein the seedling feeding case (59) is formed nearly into an L-shape having a transverse case portion (59b) connected to the transplanting frame (20) and a longitudinal case portion (59a) extending vertically from the transverse portion, the longitudinal feeding camshaft (65) is extended inward along the width direction of the rice transplanter from the longitudinal case portion (59a), and a longitudinal feed cam (116)
provided on the longitudinal feeding camshaft (65) is located in a space having a shape like one side open square formed by the seedling feeding case (59) and the longitudinal feeding camshaft (65).
4. A rice transplanter as claimed in claim 1, wherein the seedling feeding case (59 is formed nearly into an L-shape having a transverse case portion (59b) connected to the transplanting frame (20) and a longitudinal case portion (59a) to which the seedling feeding shaft (58) is connected, the longitudinal case portion (59a) accommodates a speed change mechanism (64) for changing a seedling feeding speed, and the transverse case portion (59b) accommodates a changeover mechanism (131) for changing over the speed change mechanism (64).
5. A rice transplanter as claimed in claim 1, wherein the transplanting frame (20) and seedling feeding case (59) comprises a frame joint (48a) wherein the frame joint (48a) has a flange portion (60) mounted and fixed to a flange portion (61) of the seedling feeding case (59), and a protruding portion protruded from the flange portion (60) of the frame joint (48a); and the flange portion (61) of the seedling feeding case (59) is provided with a joint fit portion (124) to which the protruding of the frame joint (48a) is fitted
6. A rice planter as claimed in claim 1 wherein seedling rack (16) having a seedling picking amount adjusting member (88) for adjusting an amount of seedling picked from the said seedling rack (16), wherein the seedling picking amount adjusting member (88) has a transverse shaft portion (88a) and a longitudinal shaft portion (88b), both of which are integrally combined so as to be nearly L-shape; the transverse shaft portion (88a) is positioned at a rear of the seedling feeding case (59); the longitudinal
shaft portion (88b) is extended forwardly from one end of the transverse shaft portion (88a) so as to be positioned at an outer side of the seedling feeding case (59); and a tip end of the longitudinal shaft portion (88b) is positioned at a front of the seedling feeding case (59).
7. A rice transplanter as claimed in claim 1 wherein transplanting frame (20) comprises a member (77) for supporting right and left line drawing markers (76) in a foldable manner, wherein one side of said marker supporting member (77) is fixed to the transplanting frame (20), the other side is folded toward an exterior of a machine body, and a folding portion of the marker supporting member (77) is positioned at the front of the seedling feeding case (59).
8. A rice transplanter as claimed in claim 7, wherein the seedling feeding case (59) is positioned between a protecting member (74) provided to one end of a float supporting member (67) and the marker supporting member (77).

Documents:

1302-delnp-2003-abstract.pdf

1302-delnp-2003-claims.pdf

1302-delnp-2003-complete specification (as files).pdf

1302-delnp-2003-complete specification (granted).pdf

1302-delnp-2003-Correspondence-Others-(09-03-2010).pdf

1302-delnp-2003-correspondence-others.pdf

1302-delnp-2003-correspondence-po.pdf

1302-delnp-2003-description (complete).pdf

1302-delnp-2003-drawings.pdf

1302-delnp-2003-form-1.pdf

1302-delnp-2003-form-18.pdf

1302-delnp-2003-form-2.pdf

1302-delnp-2003-form-3.pdf

1302-delnp-2003-form-5.pdf

1302-delnp-2003-gpa.pdf

1302-delnp-2003-pct-101.pdf

1302-delnp-2003-pct-210.pdf

1302-delnp-2003-pct-304.pdf

1302-delnp-2003-pct-308.pdf

1302-delnp-2003-pct-332.pdf

1302-delnp-2003-petition-137.pdf

1302-delnp-2003-petition-138.pdf


Patent Number 241748
Indian Patent Application Number 1302/DELNP/2003
PG Journal Number 31/2010
Publication Date 30-Jul-2010
Grant Date 23-Jul-2010
Date of Filing 14-Aug-2003
Name of Patentee YANMAR AGRICULTURAL EQUIPMENT CO. LTD
Applicant Address 1-32, CHAYAMACHI, KITA-KU, OSAKA-SHI, OSAKA 530-8321, JAPAN.
Inventors:
# Inventor's Name Inventor's Address
1 KUNIO DOI C/O YANMAR ARICULTURAL EQUIPMENT CO. LTD., 1-32, CHAYAMACHI, KITA-KU, OSAKA-SHI, OSAKA 530-8321, JAPAN.
PCT International Classification Number A01C 11/02
PCT International Application Number PCT/JP01/07871
PCT International Filing date 2001-09-10
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 2001-66602 2001-03-09 Japan