Title of Invention

CRAWLER APPARATUS

Abstract A drive wheel is rotated and driven by an axle in a crawler apparatus, thereby driving a crawler belt wound around the drive wheel, a front idler, a rear idler, and a plurality of track rollers. A pivoting frame comprises a front idler support portion for supporting the front idler, a rear idler support portion for supporting the rear idler, a main frame to which the plurality of track rollers is attached, and a pivot shaft disposed above the main frame. The pivoting frame further comprises a front connecting member for connecting the pivot shaft and the front idler support portion, and a rear connecting member for connecting the pivot shaft and the rear idler support portion. The front and rear connecting members and the main frame are configured so as to form an opening that opens in the lateral direction between the front and rear connecting members and the main frame.
Full Text

DESCRIPTION CRAWLER APPARATUS TECHNICAL FIELD
The present invention relates to a crawler apparatus. BACKGROUND ART
Crawler apparatuses have conventionally been of a semi-crawler type, and are attached to tractors and other vehicles in place of wheels. Certain semi-crawler style crawler apparatuses comprise a pivoting frame that is supported via a pivot shaft on a frame support body fixed to a vehicle body side of a vehicle, the frame being allowed to pivot around the center of the shaft in a lateral direction. The pivoting frame supports a front idler and a rear idler and a plurality of track rollers disposed between the front and rear idlers, and comprises a drive wheel that is disposed above the track rollers and is rotatably supported on the vehicle body side around the shaft center along the lateral direction. The axle of the vehicle rotates and drives the drive wheel, whereby a crawler belt that is wound around the drive wheel, the front and rear idlers, and the track rollers is made to move in a circulating manner (see Japanese Laid-open Patent Application No. 2004-148872).
The pivoting frame of a conventional crawler apparatus is principally composed of a main frame, which supports the front and rear idlers and the track rollers; a support plate, which extends upward from the inside end of the main frame in the lateral direction, and whose surface faces the lateral direction; a pivot shaft, which is secured on the upper end side of the support plate, and which is axially rotatably supported in the frame support body in the lateral direction; and a pair of front and rear reinforcement plates disposed so as to extend from the pivoting shaft side to the main frame, and welded securely to the outer surface of the support plate in the lateral direction.

In the aforementioned conventional crawler apparatus, the pivoting frame comprises a support plate, which extends upwardly from the inner edge of the main frame in the lateral direction, and which has a surface facing the lateral direction; and a pair of front and rear reinforcement plates disposed so as to extend from the pivot shaft, which is secured to the upper end of the support plate, to the main frame, and welded securely to the outer surface of the support plate in a lateral direction. Consequently, the support plate and the reinforcement plate tend to prevent dirt on the main frame from falling off (i.e., dirt readily accumulates on the main frame of the pivoting frame), the dirt that accumulates on the main frame falls on the road as the vehicle moves, and problems are presented in regard to, e.g., the effort involved in removing that dirt, as well as the work involved in getting rid of any residual dirt when the vehicle is washed. SUMMARY OF THE INVENTION
With the foregoing problems in view, it is an object of the present invention to provide a crawler apparatus in which dirt does not readily collect on top of the main frame of the pivoting frame.
The crawler apparatus of the present invention comprises the following: a frame support body supported on a vehicle body of a vehicle; a pivoting frame pivotably supported on the frame support body via a pivot shaft about an axial center extending in a lateral direction; a front idler and a rear idler supported on the pivoting frame; a plurality of track rollers disposed between the front idler and the rear idler and supported on the pivoting frame; and a drive wheel disposed above the track rollers and supported via an axle on the vehicle body. The crawler apparatus is configured so that the drive wheel is rotated and driven by the axle, thereby driving a crawler belt that is wound around the drive wheel, the front idler, the rear idler, and the track rollers. The pivoting frame comprises a front

idler support portion for supporting the front idler, a rear idler support portion for supporting the rear idler, a main frame to which the plurality of track rollers is attached, and the pivot shaft disposed above the main frame. The pivoting frame further comprises a front connecting member for connecting the pivot shaft with the front idler support portion, and a rear connecting member for connecting the pivot shaft with the rear idler support portion. The front and rear connecting members and the main frame are configured so as to form an opening that opens in the lateral direction between the front and rear connecting members and the main frame.
According to the above configuration, the front and rear connecting members and the main frame are configured so that an opening is formed in the lateral direction between the front and rear connecting members and the main frame. As a result, dirt tends not to accumulate on the main frame.
In an embodiment of the present invention, the pivoting frame preferably comprises an intermediate connecting member for connecting a part of the front and rear connecting members in a region near the pivot shaft, and an intermediate portion of the main frame along the longitudinal (i.e. fore and aft)direction.
In an embodiment of the present invention, preferably, the front and rear connecting members are configured using a pipe member, and the front connecting member is inclined downward toward the front idler support portion from the pivot shaft, and the rear connecting member is inclined downward toward the rear idler support portion from the pivot shaft.
In an embodiment of the present invention, the opening preferably comprises an opening portion that extends uninterrupted from the lower surface of at least a part of the front connecting member to the upper surface of the main frame in a vertical direction, and an opening portion that extends uninterrupted from the lower surface of at least a

part of the rear connecting member to the upper surface of the main frame in a vertical direction.
In an embodiment of the present invention, the opening preferably comprises an opening portion that extends uninterrupted from the lower surface of at least a part of the front connecting member to the upper surface of the main frame in a vertical direction, and extend uninterrupted from a front end region of the front connecting member to a front surface of the intermediate connecting member in a longitudinal direction; and an opening portion that extends uninterrupted from the lower surface of at least a part of the rear connecting member to the upper surface of the main frame in a vertical direction, and extend uninterrupted from a rear surface of the intermediate connecting member to a rear end region of the rear connecting member in a longitudinal direction.
In an embodiment of the present invention, the area occupied by the intermediate connecting member as viewed from the side is preferably smaller than the area of the opening.
It is conventional to provide crawler apparatuses with pivot-restricting means for restricting pivoting of the pivoting frame beyond a predetermined range. The conventional pivot-restricting means includes a pivot plate that is disposed forwardly of the pivot shaft of the pivoting frame, that has its plate surface facing laterally, and that is pivot able with the pivoting frame, a pair of upper and lower stopper members fixed to a laterally inner face of the pivoting plate, a roller member disposed between the upper and lower stopper members and fixed to a pair of front and rear bracket members that is in turn fixed to the frame support body, and a restricting plate disposed laterally inwardly of the roller member and fixed to the upper and lower stopper members. With the pivot-restricting members having this type of structure, pivoting movement of the pivoting frame is restricted when the pivoting of the

pivoting frame causes the roller member to abut the upper or lower stopper member. And any laterally inward movement of the pivoting frame is restricted as the roller member engages the pivot plate. The laterally outward movement of the pivoting frame is restricted by the engagement of the roller member with the restricting plate.
With this conventional crawler apparatus, the pivot-restricting means has many parts and a complex structure. Its parts are also large, making the device prone to the problem of having dirt accumulate in the space between the upper and lower stopper members, which in turn makes it difficult for the pivoting frame to move.
Also, dirt may enter the roller member making it more difficult for the roller member to move.
In light of this problem, a crawler apparatus in accordance with the present invention comprises, a frame support body supported on a vehicle body of a vehicle; a pivoting frame pivotably supported on the frame support body about an axial center extending in a lateral direction; a front idler and a rear idler supported on the pivoting frame; a plurality of track rollers disposed between the front idler and the rear idler and supported on the pivoting frame; and a drive wheel disposed above the track rollers and supported via an axle on the vehicle body. The crawler apparatus is configured so that the drive wheel is rotated and driven by the axle, thereby driving a crawler belt that is wound around the drive wheel, the front idler, the rear idler, and the track rollers. The crawler apparatus has a pivot plate disposed laterally outwardly of the frame support body and configured to pivot with the frame support body, the frame support body including a plate surface facing laterally and a pivot-restricting opening , and a pivot-restricting body fixed to the frame support body and having an engagement portion that is inserted into the pivot-restricting opening, wherein when the pivoting frame pivots, the pivoting movement of the pivoting frame is

restricted by an abutment of an edge of the pivot plate forming the pivot-restricting opening against the engagement portion.
This construction provides a simple structure with a pivot-restricting means for restricting a pivoting frame beyond a predetermined range and that makes it difficult for dirt to accumulate therein.
In an embodiment, the crawler apparatus preferably further comprises an inward restricting portion provided to the pivot-restricting body and configured to restrict a laterally inward movement of the pivoting frame by abutting the pivot plate; and an outside restricting member fixed to the engagement portion of the pivot-restricting body at a location laterally outwardly of the pivot plate and configured to restrict an laterally outward movement of the pivoting frame by abutting the pivot plate.
In an embodiment, it is preferable that the pivot plate is fixed to a laterally inward face of an upper portion of each of the front connecting member and the rear connecting member.
Dirt and mud tend to stick to the interior surfaces of the crawler belt when a vehicle equipped with a crawler apparatus runs in an agricultural field. The mud and dirt then fall off on a paved road when the vehicle moves out of the field and onto the paved road making it necessary to deal with the dirt and mud. This also makes it more time consuming to clean the vehicle.
To this end, as a device that can remove the dirt and mud stuck to the inner peripheral surfaces of the crawler belt, a crawler apparatus with a scraper is known to guide mud and dirt on the inner peripheral surfaces of the crawler belt laterally (see Japanese Utility Model 5-75076).
With this conventional crawler apparatus, since the scraper is always in the position where the scraper works against the dirt on the inner peripheral surfaces of the

crawler belt, the scraper may also exert resisting force during an operation.
Accordingly, it is an alternative object of the present invention to provide a crawler apparatus that alleviate this problem.
In light of this, the crawler apparatus in accordance with the present invention comprises, a frame support body supported on a vehicle body of a vehicle; a pivoting frame pivotably supported on the frame support body about an axial center extending in a lateral direction, the pivoting frame having a main frame; a front idler and a rear idler supported on the pivoting frame; a plurality of track rollers disposed between the front idler and the rear idler and supported on the main frame of the pivoting frame; and a drive wheel disposed above the track rollers and supported via an axle on the vehicle body. The crawler apparatus is configured so that the drive wheel is rotated and driven by the axle, thereby driving a crawler belt that is wound around the drive wheel, the front idler, the rear idler, and the track rollers; a scraper for removing dirt on the inner peripheral surface of the crawler belt laterally of the crawler belt. The scraper is supported to the main frame such that the scraper is movable between an engaged position for clearing off dirt on the inner peripheral surface of the crawler belt and a retracted position retracted from the engaged position.
With this structure, the scraper can be moved to the retracted position during the field operation so that the scraper would not exert any resisting force. The scraper can then be moved to the engaged position for example when the vehicle moves out of the field onto a paved road or otherwise as necessary, which allows the dirt on the inner peripheral surfaces of the crawler belt to be removed laterally. As a result, less dirt will fall on the paved road.

In an embodiment, it is preferable that the scraper is attached to an attachment member for the rear idler at a location spaced apart from where the crawler belt contacts the ground.
In an embodiment, it is preferable that the scraper has a scraper blade adapted to contact dirt on the inner peripheral surface of the crawler belt and a blade support mount that supports the scraper blade, wherein the scraper blade is supported on the blade support mount such that the scraper blade can move toward and away from the inner peripheral surface of the crawler belt.
In an embodiment, it is preferable that the scraper is movable between the engaged position and the retracted position by pivoting about a spindle and is urged toward the engaged position and the retracted position by an urging force of a spring with the spindle being a position at which a direction of the urging force changes, and wherein the scraper is moved from the engaged position to the retracted position by a load beyond a predetermined value.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a crawler apparatus;
FIG. 2 is a side view of a tractor on which the crawler apparatus is mounted;
FIG. 3 is a side view of a frame support body and a pivoting frame;
FIG. 4 is a rear view of the crawler apparatus;
FIG. 5 is a side view of the pivoting frame;
FIG. 6 is a cutaway top view of the pivoting frame;
FIG. 7 A is a partial cross-sectional rear view of the pivoting frame, and FIG. 7b is a cross-sectional view as seen from the arrows in line A-A in FIG. 5;
FIG. 8A is a side view of the frame support body, and FIG. 8B is a partial cross-sectional rear view of the frame support body;

FIG. 9A is a drawing of the member indicated by the arrow from the B in FIG. 1, FIG. 9B is an enlarged side view of the pivot-restricting means, and FIG. 9C is a cross-section of the pivot-restricting means as viewed from above;
FIG. 10 is a side view of a crawler apparatus having a scraper;
FIG. 11 is a side view of a scraper apparatus;
FIG. 12 is a top view of the scraper apparatus; and
FIG. 13 is a schematic structural drawing indicating the positioning of the cutter of the scraper in relation to the crawler belt.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
A description is provided hereunder of an embodiment of the present invention, with reference being made to the accompanying drawings.
In FIG. 2, 1 is a tractor (vehicle) to which individual semi-crawler style crawler apparatuses 2 are attached on the left and right sides instead of the rear wheels of a four-wheeled tractor that is able to travel using a pair of front and rear wheels on the left and right.
The vehicle body 1A of the tractor 1 is primarily composed of a power transmission case 4 attached to a rear part of an engine 3 via a flywheel housing. The power transmission case 4, e.g., houses a power transmission mechanism for transmitting power from the engine 3 to an axle 5 (rear axle) for driving the crawler apparatus 2, the transmission case being connected to a rear part of a clutch housing.
The rear axle 5 protrudes outward in the lateral direction from left and right axle cases 6 provided to the right and left sides of a rear part of the vehicle body 1A, and is rotatably supported around the transverse axial center by the rear axle cases 6. Attaching flanges 7 are provided to the outside left and right ends of the of the rear axle 5 in the lateral direction.

As shown in FIGS. 1 to 9, the left and right crawler apparatuses 2 comprise a frame support body 8 secured to the side of the vehicle body 1A of the tractor 1; a pivot frame 9 that is pivotably supported by the frame support body 8 around the axial center in the lateral direction; front and rear idlers 10, 11 provided to the front and rear of the pivot frame 9; a plurality (three in the present embodiment) of track rollers 12 disposed between the front and rear idlers 10, 11 of the pivot frame 9; a drive wheel 13 (sprocket) disposed above the track rollers 12 and rotatably supported around the axial center on the side of the vehicle body 1A in the lateral direction; and a crawler belt 14 wound around the drive wheel 13, the front and rear idlers 10, 11, and the track rollers 12.
The drive wheel 13 is bolted securely to the attaching flanges 7 on the outer edges of the rear axle 5, and, together with the rear axle 5, is rotatably supported by the rear axle case 6 around the axial center in the lateral direction.
Engagement teeth 15 are provided to the outer periphery of the drive wheel 13 at prescribed intervals along a circumferential direction. Engagement holes 16 into which the engagement teeth 15 fit on being inserted therein are formed at prescribed intervals in a lengthwise direction along the crawler belt 14. The drive wheel 13 is rotated and driven by the rear axle 5 of the tractor 1, whereby the crawler belt 14 is made to travel in a circular manner. The side of the crawler belt 14 facing outward in the lateral direction from the engagement holes 16 is formed longer in the lateral direction than the side facing inward in the lateral direction.
The frame support body 8 is mainly composed of a pair of front and rear attachment plates 17 disposed so as to hold therebetween an attachment portion 6a provided to the rear axle case 6; a symmetrical pair of support plates 18, disposed on the left and right of the front and rear

attachment plates 17, and provided so as to extend downward from the lower edge of the front and rear attachment plates 17; a connection plate 19 for connecting the upper ends of the left and right support plates 18; and a bearing member 20 comprising a cylindrical body that passes through the left and right support plates 18.
The front and rear attachment plates 17, the left and right support plates 18, and the connection plate 19 are welded together; and the bearing member 20 is welded to the left and right support plates 18.
The front and rear attachment plates 17 are connected and secured to the rear axle case 6 by bolts that pass through the attachment plates 17 and thread into screw holes on the rear axle case 6. The left and right support plates 18 are connected and secured to the rear axle case 6 by bolts that pass through the left and right support plates 18, and thread into a screw hole on the rear axle case 6.
The bearing member 20 has an axial center in the lateral direction, and is provided so that the axial center thereof will be positioned below the axial center of the rear axle 5, and in the same position as the axial center of the rear axle 5 in the longitudinal direction.
The support plates 18 on the outward side in the lateral direction comprise an extension portion 21 that extends farther forward than the support plates 18 on the inward side in the lateral direction.
The left and right support plates 18 on the outside of the frame support body 8 are connected by a connection body 22 shown in FIG. 9. The connection body 22 comprises a connection plate 23 bolted securely to the lower surface side of the vehicle body 1A.
The pivot frame 9 is mainly composed of a main frame 2 6
comprising front and rear idler support portions 24, 25 for
supporting the front and rear idlers 10, 11; a pivot shaft
i 27 disposed in the lateral direction above a section partway
along the main frame 26 in the longitudinal direction; a

front connecting member 28 for connecting the pivot shaft 27 and the front idler support portion 24; a rear connecting member 29 for connecting the pivot shaft 27 and the rear idler support portion 25; and an intermediate connecting member 30 for connecting the pivot shaft 27 sides of the front and rear connecting members 28, 29 to an intermediate portion of the main frame 2 6 along the longitudinal direction.
In the pivot frame 9 having the aforedescribed configuration, a space between the front and rear connecting members 28, 29 and the main frame 26 (in the present embodiment, the region bounded by the front and rear connecting members 28, 29, the main frame 26, and the intermediate connecting member 30) assumes the form of an opening in the lateral direction, and a structure is formed wherein dirt tends not to collect on top of the main frame 26.
The main frame 2 6 comprises a main plate 31, which is formed from a plate member in the form of a thick band, and which is disposed so that the direction of the plate thickness is the vertical direction, and the lengthwise direction of the band is the longitudinal direction. The front idler support portion 24 is provided to the front part of the main plate 31, and the back idler support portion 25 is provided to the rear part of the main plate 31.
The main plate 31 is disposed below the drive wheel 13. Track roller attachment brackets 32 are attached securely to the front end, rear end, and longitudinal center of the bottom surface of the main plate 31. The track rollers 12 are attached to the track roller attachment brackets 32 so as to be rotatable around the axial center in the lateral direction.
A crawler [ belt] detachment preventing member 33 is provided to the bottom surface of the main plate 31 to prevent the crawler belt 14 from detaching.

The front idler support portion 24 possesses a tensioning apparatus 34 for imparting tension to the crawler belt 14, and a front support bracket 35 for supporting the front idler 10.
The tensioning apparatus 34 comprises an outer cylindrical body 36 secured to the upper surface of the front part of the main plate 31; a rear wall 37 vertically provided to the main plate 31 and anchored to a rear end of the outer cylindrical body 36; an inner cylindrical body 38 retractably inserted from the front side of the outer cylindrical body 36; a front wall 39 anchored to the front end of the inner cylindrical body 38; and a spring bearing body 40 attached to the rear wall 37 so as to be retractable along the longitudinal direction and so as to be fixed in position; and a spring 41 disposed between the spring bearing body 40 and the front wall 39.
The front support bracket 35 for supporting the front idler 10 is provided to the front surface of the front wall 39 of the tensioning apparatus 34. The front idler 10 is attached to an attachment member 42 bolted securely to the front surface of the front support bracket 35, and is rotatably attached around the axial center in the lateral direction. The front idler 10 is pressed against the crawler belt 14 by the urging force of the spring 41, whereby tension is imparted to the crawler belt 14. Advancing or retracting the spring bearing 40 in the longitudinal direction enables the tension of the crawler belt 14 to be adjusted.
The rear wall 37 extends from the main plate 31 inward in the lateral direction.
The rear idler support portion 25 comprises an attachment plate 43, which assumes an L shape when viewed from the side, and which is formed from a lower wall 43a anchored on top of the main plate 31, and a vertical wall 43b extending upward from the rear end of the lower wall 43a; and a rear support bracket 44 anchored to the rear

surface of the vertical wall 43b of the attachment plate 43. The rear idler 11 is rotatably attached to an attachment member 45 around the axial center in the lateral direction. The attachment member 4 5 is bolted securely to the rear surface side of the rear support bracket 44.
The attachment plate 43 extends from the main plate 31 inward in the lateral direction.
The rear support bracket 44 comprises left and right side walls 44a; upper walls 44b that extend inward in a lateral direction from the upper end sides of the left and right side walls; and attachment walls 44c that extend outward in a lateral direction from the rear ends of the left and right side walls 44a. A notch 22 for preventing interference with the rear idler 11 is formed on the upper surface, and a pair of upper and lower nuts 23A are anchored to the front surfaces of the left and right attachment walls 44c.
The attachment member 45 is disposed on the rear surfaces of the left and right attachment walls 4 4c, and is secured to the rear support bracket 44 by bolts 23B that pass through the attachment walls 4 4c and the attachment member 45, and thread through the nuts 23A. The attachment walls 44c of the rear attachment bracket 44 and the attachment member 45 are slanted slightly rearward with respect to the vertical direction.
The front and rear connecting members 28, 29 are composed of pipe members; and particularly by a square pipe in the present embodiment, and are disposed on the inward side of the drive wheel 13 in the lateral direction.
One end of the front connecting member 28 in the lengthwise direction is anchored to the outer edge of the pivot shaft 27 in the lateral direction, and the other end in the lengthwise direction is anchored to the extension section of the rear wall 37 of the front idler support portion 24. The front connecting member 28 assumes a

configuration that slants downward and frontward from the pivot shaft 27 toward the front idler support portion 24.
A reinforcement member 46, which is welded to the main plate 31, the rear wall 37, and the front connecting member 28, is provided to the outward side of the lower edge of the front connecting member 28.
One end of the rear connecting member 2 9 in the lengthwise direction is anchored to the outer edge of the pivot shaft 27 in the lateral direction, and the other end in the lengthwise direction is anchored to the extension section of the vertical wall 43b of the attachment plate 43 of the rear idler support portion 25. The rear connecting member 29 assumes a configuration that slants downward and rearward from the pivot shaft 27 toward the rear idler support portion 25.
A reinforcement member 47, which is welded to the attachment plate 43, and the rear connecting member 2 9, is provided to the right and left sides of the lower edge of the rear connecting member 29.
The intermediate connecting member 30 is formed in a bottomed square cylindrical configuration having an axial center in the vertical direction. The upper edge of the intermediate connecting member 30 is anchored to the lower surface of the front edge of the rear connecting member 29 and to the lower surface of the rear edge of the front connecting member 28. The lower edge of the intermediate connecting member 30 is anchored to the inside surface of the main plate 31 in the lateral direction.
In the present embodiment, the intermediate connecting member 30 is formed from two members; i.e., an outside member 48 on the outward side in the lateral direction, and an inside member 49 on the inward side in the lateral direction.
The outside member 48 assumes the shape of three-sided square as viewed from the top, and is formed from an outside wall 30a, which constitutes an outward part of the

intermediate connecting member 30 in the lateral direction; and front and rear walls 30bf 30c, which extend from the front and rear sides of the outside wall 30a inward in the lateral direction, and which constitute front and rear parts of the intermediate connecting member 30. The upper end of the outside member 48 is anchored to the lower surface of the rear edge of the front connecting member 28, and the lower surface of the front edge of the rear connecting member 29. The lower edge of the outside wall 30a is anchored to the inside surface of the main plate 31 in the lateral direction.
The inside member 4 9 is formed in the shape of an L from an inside wall 30d, which constitutes the inward part of the intermediate connecting member 30 in the lateral direction; and a bottom wall 30e, which extends outward in the lateral direction from the lower end of the inside wall 30d, and which constitutes the bottom part of the intermediate connecting member 30.
An L-shaped reinforcing member 50 is provided to the lower part of the intermediate connecting member 30; and is formed from a longitudinal wall 50a anchored to the outside surface of the intermediate connecting member 30, and a lower wall 50b anchored to the upper surface of the main plate 31.
The pivot shaft 27 comprises a shaft main body 51 made of a cylindrical body having an axial center in the lateral direction; an outside blocking plate 52 for blocking the outer edge of the shaft main body 51 in the lateral direction; and an inside blocking plate 53, which is inserted into and anchored to the inside edge of the shaft main body 51 in the lateral direction.
A screw hole 54 having an axial center in the lateral direction is formed through the inside blocking plate 53.
A section of the pivot frame 27 from a part midway in the lateral direction to the inner end is concentrically inserted in the bearing member 2 0 of the frame support body

8 from the outer edge of the bearing member 20 in the lateral direction, and is rotatably supported by the bearing member 20 around the axial center in the lateral direction. The pivot frame 9 is thereby pivotably supported by the frame support body 8 around the pivot shaft 27.
A bolt 55 is passed through a retaining plate 56 disposed on the inner edge of the bearing member 20 in the lateral direction, and is threaded into the screw hole 54 of the inside blocking plate 53. The pivot shaft 27 is thereby prevented from being pulled out of the bearing member 20,
In the pivot frame 9 configured as described above, the front and rear idler support portions 24, 25 of the main frame 2 6 are connected to the pivot shaft 27 using the front and rear connecting members 28, 29 made of square piping, and a truss structure is formed, thereby ensuring strength.
The crawler type vehicle 2 comprises pivot-restricting means for keeping the pivot frame 9 from pivoting around the pivot shaft 27 beyond a prescribed range. The pivot-restricting means comprises a pivot plate 57 that is able to pivot integrally with the pivot frame 9; a pivot-restricting opening 58 formed in the pivot plate 57; a pivot-restricting body 59 for contacting edge parts 58a, 58b of the pivot-restricting opening 58 and keeping the pivot plate 57 from pivoting beyond a prescribed range; and an outside restricting member 60, which is attached to the pivot-restricting body 59.
The pivot plate 57 is disposed on the outer side of the support plate 18 on the outer side of the frame support body 8 in the lateral direction, so that the surfaces face (one another) in the lateral direction.
A shaft insertion hole 61 is formed in the rear part of the pivot plate 57. The pivot shaft 27 is inserted in the shaft insertion hole 61 from the inside end thereof in the lateral direction. The pivot plate 57 is in contact with the > inside surface in the lateral direction of the upper part of the front connecting member 28 and the rear connecting

member 2 9 (pivot shaft 27 side) , and the upper end of the inside member -49 of the intermediate connecting member 30; and is welded securely to the pivot shaft 27, the front connecting member 28, the rear connecting member 29, and the inside member 49 of the intermediate connecting member 30.
The front end side of the pivot plate 57 and the forward lower end side of the front connecting member 28 are connected by a reinforcement member 62 made of an angle iron. 1 The pivot plate 57 is in contact with the outside end in the lateral direction of the bearing member 20 on the frame support body 8.
A front part of the pivot plate 57 protrudes forward from the pivot shaft 27, and is configured so as to pivot vertically around the pivot shaft 27. The pivot-restricting opening 58 is formed in a position corresponding to a side of the extension portion 21 of the support plate 18 on the frontward side of the pivot shaft 27 and on the outward side of the frame support body 8 in the lateral direction.
The pivot-restricting body 59 is welded securely on the outside surface of the extension portion 21 of the support plate 18 on the outward side of the frame support body 8 in the lateral direction, and in a position corresponding to the pivot-restricting opening 58 in the lateral direction. In addition, an engagement portion 63 inserted in the pivot-restricting opening 58 is formed in the pivot-restricting body 59.
Consequently, when the pivot frame 9 pivots around the pivot shaft 27, the front portion of the pivot plate 57 integrally pivots in a vertical direction, and the engagement portion 63 makes contact with the upper and lower edge parts 58a, 58b (edge parts in the pivoting direction) of the pivot-restricting opening 58. The pivot frame 9 can accordingly be kept from pivoting beyond a prescribed range.

A pair of front and rear screw holes 64 are formed on the engagement portion 63 from the outer side in the lateral direction thereof.
Inward restricting portions 65 provided to the pivot-restricting body 59 are positioned on the front and rear sides of the engagement portion 63, and face the inside surface of the pivot plate 57 in the lateral direction. The inward restricting portions 65 engage with the pivot plate 57, whereby movement toward the inward side of the pivot frame 9 in the lateral direction is restricted.
The outside restricting member 60 is formed from a plate material, and is disposed so that the plate thickness direction is aligned with the lateral direction on the outside of the engagement portion 63 of the pivot-restricting body 59 in the lateral direction, and on the outside of the pivot plate 57 in the lateral direction. The outside restricting member 60 is attached and fixed to the pivot-restricting body 59 using bolts 66 that pass through the outside restricting member 60, and thread into the screw hole 64 of the engagement portion 63.
The longitudinal width of the outside restricting member 60 is formed longer than the pivot-restricting opening 58. The front and rear sides of the outside restricting member 60 engage with the pivot plate 57, thereby restricting movement of the pivot frame 9 toward the outer side in the lateral direction.
The pivot-restricting means having the above-described configuration can be formed to have a simple structure having a function for restricting the pivoting of the pivot frame 9 beyond a prescribed range, and a function for restricting the movement of the pivot frame 9 inward and outward in the lateral direction.
Little risk is posed of dirt accumulating in the pivot-restricting opening 58, and the likelihood that the pivoting of the pivot frame 9 will be impaired by the dirt amassed in the pivot-restricting means is extremely low.

The front and rear connecting members 28, 29 are in an inclined configuration, and the pivot plate 57 is secured to the inside surfaces of the front and rear connecting members 28, 29. Consequently, dirt rarely accumulates on the front and rear connecting members 28, 29, or on the outside surface of the pivot plate 57.
A through-hole 67 is formed vertically through the pivot-restricting body 59, and is configured to inhibit the accumulation of dirt thereon.
Dirt does not readily accumulate on the pivot-restricting means or the periphery thereof, which facilitates cleaning of the vehicle.
As shown in FIGS. 10 through 13, the crawler apparatus 2 may be provided with a scraper apparatus 161 so that dirt on an inner peripheral surface 14a of the crawler belt 14 will be cleared off to the side of the crawler belt 14.
The scraper apparatuses 161 are provided to an outside part of the left and right crawler apparatuses 2, and are provided so as to remove mud and dirt on the laterally outward side from the engagement holes 16 in the lateral direction (i.e., outward from the outside track roller rolling surface 170) of the inner peripheral surface 14a of the crawler belt 14 of the left and right crawler apparatuses 2.
The scraper apparatuses 161 may also be provided to the inside part of the left and right crawler apparatus, so that mud and dirt on the inner side in the lateral direction will be cleared from the engagement holes 16 of the inner peripheral surface 14a of the crawler belt 14.
The scraper apparatus 161 is mainly composed of a mounting 62 that is attached securely to the main frame 2 6 of the pivot frame 9; a scraper 163 that is attached to the mounting 162 and is configured to be switched to an engaged position when dirt on the inner peripheral surface 14a of the crawler belt is to be cleared off to the side, or to a retracted position when the scraper is to be retracted from

the engaged position; and an unstable switching spring lb4 for keeping the scraper 163 able to be changed between the engaged position and the retracted position.
The mounting 162 is formed from a plate member, and comprises a base plate portion 165, and a pair of upper and lower attachment walls 166 provided to the base plate portion 165. In the present embodiment, the mounting 162 is attached to the attachment part of the rear idler 11.
The base plate portion 165 of the mounting 162 is disposed on the outside of the rear idler 11 in the lateral direction, and on the rear part side of the rear idler 11, so that the plate surface faces in the lateral direction (and the plate thickness direction aligns with the lateral direction) . A recessed portion 168 is formed on the front part of the base plate portion 165. The recessed portion 168 recedes rearward from a portion that is partway along the vertical direction on the front end so as to avoid a bearing portion 167 for supporting the rear idler 11. The attachment walls 166 are positioned above and below the recessed portion 168 on the front end of the base plate portion 165, and are integrally formed so as to extend outward in the lateral direction from the front edge portion of the base plate portion 165.
The upper and lower attachment walls 166 are superposed from the reverse side onto the attachment member 45 for supporting the rear idler 11, and are tightened together using bolts 23B for attaching the attachment member 45 to the attachment wall 44c of the rear support bracket 44, The attachment mount 162 is thereby attached to the rear support bracket 44.
The scraper 163 is secured to a pivot member 169, which is pivotably supported on the base plate portion 165 of the attachment mount 162.
A pair of upper and lower support pieces 171 are provided to the rear end side on the outer surface of the base plate portion 165 of the attachment mount 162 in the

lateral direction. A supported piece 173 is provided to the pivot member 169 and is rotatably supported via a spindle 172 around the axial center thereof on the support pieces 171. The axial center of the spindle 172 assumes an inclined form that heads rearward in the upper direction, but is not inclined in the lateral direction.
When the scraper 163 is in the engaged position, the pivot member 169 is positioned rearward of the base plate portion 165 of the attachment mount 162 so that the plate thickness direction is aligned in the lateral direction. The front end side of the pivot member 169 comes into contact with the rear end surface of the base plate portion 165, thereby restricting the rotation of the pivot member 169 toward the rear idler 11, and allowing pivoting from the aforementioned position to the forward side. The pivoting of the pivot member 169 to the forward side causes the scraper 163 to change to the retracted position, in which state the scraper 163 goes along the rear idler 11 on the outward side thereof. The scraper 163 therefore rotates around the spindle 172, thereby changing position between the engaged position and the retracted position.
The scraper 163 comprises a scraper blade 174 and a blade support mount 17 5 for supporting the scraper blade 174. The scraper blade 174 and the cutting portion support mount 175 are formed from a band plate member.
In the engaged position, the scraper blade 174 and the blade support mount 175 of the scraper 163 are disposed so as to protrude outward from the pivot member 169 in the lateral direction. The inside end of the blade support mount 175 in the lateral direction is welded or otherwise secured to an upper part of the outside surface of the pivot member 169. The scraper 163 is provided above and away from the part where the crawler belt 14 touches the ground. In the engaged position, moreover, the scraper 163 remains unaffected by any irregularities of the ground surface on which the crawler belt 14 makes contact.

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The scraper 163 is also configured as described below. While the scraper is in the engaged position, an edge portion 74a along the lengthwise direction of the scraper blade 174 is disposed substantially parallel to the inner peripheral surface 14a of the crawler belt 14. As shown in FIG. 13A, the edge portion 7 4a is also disposed in an inclined configuration heading in direction B, in which the crawler belt 14 advances during travel, while heading in the outward direction A in the lateral direction (the direction facing the end portion of the crawler belt 14 in the lateral direction from the central part thereof in the lateral direction). Dirt on the inner peripheral surface 14a of the crawler belt 14 will be guided outward and cleared away in the lateral direction by the scraper blade 174 as a result of the crawler belt 14 being made to travel in the direction of the arrow B and thereby cause the tractor 1 to advance.
When the scraper is in the engaged position, the edge portion 74a on the side corresponding to the inner peripheral surface 14a of the crawler belt 14 of the scraper blade 174 may be disposed so as to contact (rub against) the inner peripheral surface 14a of the crawler belt 14, or may be disposed so as not to contact (rub against) the inner peripheral surface 14a of the crawler belt 14.
The blade support mount 175 is disposed in alignment with the scraper blade 174 in the lengthwise and thickness directions. The blade support mount 175 is also disposed so that the edge portion 174a, which lays over the upper surface side of the scraper blade 174, and which is on the side of the scraper blade 174 corresponding to the inner peripheral surface 14a of the crawler belt, protrudes from the blade support mount 17 5 toward the inner peripheral surface 14a side of the crawler belt.
The scraper blade 174 is attached securely to the blade support mount 17 5 by a fastening implement comprising a pair of nuts and bolts in the lengthwise direction. Bolt insertion holes 177 formed on the blade support mount 175

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are configured as long holes so that the scraper blade 174 can be advanced or withdrawn (moved closer or further) with respect to the inner peripheral surface 14a of the crawler belt 14.
Adjusting the scraper blade 174 toward or away from the inner peripheral surface 14a of the crawler belt 14 allows the scraper blade 174 to be placed in an optimal position in relation to the crawler belt 14. Furthermore, when the outer peripheral surface of the rear idler 11 wears away and the distance between the crawler belt 14 and the scraper blade 174 decreases, the position of the scraper blade 174 can be optimally adjusted with respect to the crawler belt 14 by adjusting the position of the scraper blade 174 in the direction away from the crawler belt 14.
As shown in FIG. 13B, the scraper blade 174 in the present embodiment is made into an inclined shape which, when viewed in a direction orthogonal to the inner peripheral surface 14a of the crawler belt 14, is oriented so that the distance between the scraper and the crawler belt 1 increases for the portions of the scraper disposed further along the direction of forward travel B (upward).
The above configuration is not provided by way of limitation. When in the engaged position, the scraper blade 174 may also be positioned so as to be orthogonal to the inner peripheral surface 14a of the crawler belt 14.
The unstable switching spring 164 is composed of a tension coil spring. One end of the tension coil spring is hooked on a spring hook portion 178 that is anchored to an outer end in the lateral direction of the blade support . mount 17 5 when in the engaged position. The other end of the tension coil spring is hooked on a spring hook portion 179, which is anchored to the upper part of the rear end of the base plate portion 165 of the attachment mount 162. The axial center of the unstable switching spring 164 is positioned rearward of the axial center of the spindle 172, Therefore, the unstable switching spring 164 urges the

scraper 163 in a direction of rotation to the rear side (inner peripheral surface 14a side of the crawler belt). The front end surface of the pivot member 169 contacts the rear end surface of the base plate portion 165, and rotation is restricted. As a result, the rotation of the scraper 163 to the rearward side is restricted, and the scraper 163 is thereby held in the engaged position.
When the scraper 163 is rotated around the spindle 172 to the front side so as enter the retracted position, and the axial center of the unstable switching spring 164 crosses the axial center of the spindle 172, then the urging direction of the unstable switching spring 164 will switch (with the axial center of the spindle 172 being the limit) , and the unstable switching spring 164 will be urged to cause rotation in the direction that causes the scraper 163 to come closer to the rear idler 11.
In this case, the scraper 163 (or the unstable switching spring 164) comes into contact with a contact part on the attachment mount 162, whereby, as shown by the imaginary line in FIG. 12, the pivoting of the scraper 163 is restricted, and the scraper 163 is kept in the retracted position (in this configuration, the scraper 163 and the unstable switching spring 164 do not contact the rear idler 11) .
The position may be switched between the engaged position and the retracted position in the scraper apparatus 161 having the above configuration. Therefore, when work is performed in a field, the scraper 163 will not hinder movement while the work is being performed if the scraper 163 is placed in the retracted position. In addition, by placing the scraper 163 in the engaged position on leaving the field, and rotating the crawler belt 14 forward for several cycles, any mud and dirt adhering to the inner peripheral surface 14a of the crawler belt 14 will be automatically guided to the outward side of the crawler belt

14 and scraped off by the scraper 163, so that the mud and dirt will not need to be scraped off by hand.
The scraper 163 will be kept in the engaged position or the retracted position by the urging force of the unstable switching spring 164 (i.e., an unstable switching mechanism will unstably switch the scraper 163 between the engaged position and the retracted position). Therefore, when the tractor 1 is reversed with the scraper 163 having been placed in the engaged position, and the crawler belt 14 collides with an indeterminate object, thereby subj ecting the scraper 163 to an impact (excessive force), the scraper 163 will rotate toward the retracted position against the urging force of the unstable switching spring 164 and move away, preventing the scraper 163 and the crawler belt 14 from being damaged.
Moreover, the front side of the crawler belt 14 is held up when the tractor 1 traverses rough parts of the field; therefore, some of the mud and dirt on the front part of the lower part of the crawler belt 14 will fall off. However, the mud and dirt that tends not to fall off the rear part of the lower part of the crawler belt 14 can be efficiently removed by the scraper 163 provided to the side of the rear idler 11.
The scraper 163 rotates forward around the axial center in a rearwardly inclined configuration and changes from the engaged position to the retracted position. The scraper 163 is accordingly retracted to a position above the ground, and mud and dirt will, in theory, tend not to adhere to the scraper 163 in the retracted position.
The scraper apparatus 161 may also be employed in a full crawler style crawler apparatus.
Vehicles other than a tractor may also be used as vehicles in which the crawler apparatus 2 of the present invention is used. The crawler apparatus 2 may also be provided in place of the front wheels.












What Is Claimed Is:
1. A crawler apparatus comprising:
a frame support body (8) supported on a vehicle body (1A) of a vehicle (1) ;
a pivoting frame (9) pivotably supported on the frame support body (8) via a pivot shaft (27) about an axial center extending in a lateral direction;
a front idler (10) and a rear idler (11) supported on the pivoting frame (9) ;
a plurality of track rollers (12) disposed between the front idler (10) and the rear idler (11) and supported on the pivoting frame (9); and
a drive wheel (13) disposed above the track rollers (12) and supported via an axle (5) on the vehicle body (1A), wherein
the crawler apparatus is configured so that the drive wheel (13) is rotated and driven by the axle (5), thereby driving a crawler belt (14) that is wound around the drive wheel (13) , the front idler (10) , the rear idler (11) , and the track rollers (12);
characterized in that
the pivoting frame (9) comprises a front idler support portion (24) for supporting the front idler (10), a rear idler support portion (25) for supporting the rear idler (11) , a main frame (26) to which the plurality of track rollers (12) is attached, and the pivot shaft (27) disposed above the main frame (26) ;
the pivoting frame (9) further comprises a front connecting member (2 8) for connecting the pivot shaft (27) with the front idler support portion (24) , and a rear connecting member (29) for connecting the pivot shaft (27) with the rear idler support portion (25); and
the front and rear connecting members (28, 2 9) and the main frame (26) are configured so as to form an opening that opens in the lateral direction between the front and rear connecting members (28, 29) and the main frame (26).

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2. The crawler apparatus according to claim 1, characterized in that the pivoting frame (9) comprises an intermediate connecting member (30) for connecting a portion of the front and rear connecting members (28, 29) in a region near the pivot shaft (27), and an intermediate portion of the main frame (26) along the fore and aft direction.
3. The crawler apparatus according to claims 1 or 2, characterized in that The front and rear connecting members (28, 29) are composed of a pipe member; the front connecting
member (28) is inclined downward toward the front idler support portion (24) from the pivot shaft (27), and the rear connecting member is inclined downward toward the rear idler support portion (25) from the pivot shaft (27).
4. The crawler apparatus according to claims 1 or 2, characterized in that the opening includes an opening portion that extends uninterrupted from the lower surface of at least a part of the front connecting member (28) to the upper surface of the main frame (26) in a vertical direction, and an opening portion that extends uninterrupted from the lower surface of at least a part of the rear connecting member (2 9) to the upper surface of the main frame (2 6) in a vertical direction.
5. The crawler apparatus according to claim 2 characterized in that the opening includes an opening portion that extends uninterrupted from the lower surface of at least a part of the front connecting member (28) to the upper surface of the main frame (26) in a vertical direction, and extend uninterrupted from a front end region of the front connecting member (28) to a front surface of the intermediate connecting member (30) in a fore and aft direction; and an opening portion that extends uninterrupted from the lower surface of at least a part of the rear connecting member (29) to the upper surface of the main frame (2 6) in a vertical direction, and extend uninterrupted from a rear surface of the intermediate connecting member

(30) to a rear end region of the rear connecting member (29) in a longitudinal direction.
6. The crawler apparatus according to claim 2 characterized in that the area occupied by the intermediate connecting member (30) as viewed from the side is smaller than the area of the opening.
7. A crawler apparatus comprising:
a frame support body (8) supported on a vehicle body (1A) of a vehicle (1) ;
a pivoting frame (9) pivotably supported on the frame support body (8) about an axial center extending in a lateral direction;
a front idler (10) and a rear idler (11) supported on the pivoting frame (9);
a plurality of track rollers (12) disposed between the front idler (10) and the rear idler (11) and supported on the pivoting frame (9); and
a drive wheel (13) disposed above the track rollers (12) and supported via an axle (5) on the vehicle body (1A) ,
wherein the crawler apparatus is configured so that the drive wheel (13) is rotated and driven by the axle (5), thereby driving a crawler belt (14) that is wound around the drive wheel (13), the front idler (10), the rear idler (11), and the track rollers (12) ;
characterized by
a pivot plate (57) disposed laterally outwardly of the frame support body (8) and configured to pivot with the frame support body (8), the frame support body (8) including a plate surface facing laterally and a pivot-restricting opening (58);
a pivot-restricting body (59) fixed to the frame support body (8) and having an engagement portion (63) that is inserted into the pivot-restricting opening (58), wherein when the pivoting frame (9) pivots, the pivoting movement of the pivoting frame (9) is restricted by an abutment of an edge (58a), (58b) of the pivot plate (57) forming the pivot-

restricting opening (58) against the engagement portion (63) .
8. The crawler apparatus according to claim 7 further
comprising an inward restricting portion (65) provided to
the pivot-restricting body (59) and configured to restrict a
laterally inward movement of the pivoting frame (9) by
abutting the pivot plate (57);
an outside restricting member (60) fixed to the engagement portion (63) of the pivot-restricting body (59) at a location laterally outwardly of the pivot plate (57) and configured to restrict an laterally outward movement of the pivoting frame (9) by abutting the pivot plate (57) .
9. The crawler apparatus according to claim 7 or 8,
characterized in that the pivoting frame (9) comprises a
front idler support portion (24) for supporting the front
idler (10), a rear idler support portion (25) for supporting
the rear idler (11) , a main frame (26) to which the
plurality of track rollers (12) is attached, and the pivot
shaft (27) disposed above the main frame (26);
the pivoting frame (9) further comprises a front connecting member (28) for connecting the pivot shaft (27) with the front idler support portion (24) , and a rear connecting member (29) for connecting the pivot shaft (27) with the rear idler support portion (25)
the pivot plate (57) is fixed to a laterally inward face of an upper portion of each of the front connecting member (28)and the rear connecting member (29).
10. A crawler apparatus comprising:
a frame support body (8) supported on a vehicle body (1A) of a vehicle;
a pivoting frame (9) pivotably supported on the frame support body (8) about an axial center extending in a lateral direction, the pivoting frame (9) having a main frame (2 6);
a front idler (10) and a rear idler (11) supported on the pivoting frame (9);

a plurality of track rollers (12) disposed between the front idler (10) and the rear idler (11) and supported on the main frame (26) of the pivoting frame (9); and
a drive wheel (13) disposed above the track rollers (12) and supported via an axle (5) on the vehicle body (1A) ,
wherein the crawler apparatus is configured so that the drive wheel (13) is rotated and driven by the axle (5) , thereby driving a crawler belt (14) that is wound around the drive wheel (13) , the front idler (10) , the rear idler (11) , and the track rollers (12);
a scraper (163) for removing dirt on the inner peripheral surface (14a) of the crawler belt (14) laterally of the crawler belt (14);
characterized in that
the scraper (163) is supported to the main frame (26) such that the scraper (163) is movable between an engaged position for clearing off dirt on the inner peripheral surface (14a) of the crawler belt (14) and a retracted position retracted from the engaged position.
11. The crawler apparatus according to claim 10, characterized in that the scraper (163) is attached to an attachment member for the rear idler (11) at a location spaced apart from where the crawler belt (14) contacts the ground.
12. The crawler apparatus according to claim 10 or 11, characterized in that the scraper (163) has a scraper blade (174) adapted to contact dirt on the inner peripheral surface (14a) of the crawler belt (14) and a blade support mount (175) that supports the scraper blade (174), wherein the scraper blade (174) is supported on the blade support mount (175) such that the scraper blade (174) can move toward and away from the inner peripheral surface (14a) of the crawler belt (14) .
13. The crawler apparatus according to claim 10 or 11, characterized in that the scraper (163) is movable between the engaged position and the retracted position by pivoting

about a spindle (172) and is urged toward the engaged position and the retracted position by an urging force of a spring (164) with the spindle (172) being a position at which a direction of the urging force changes, and wherein the scraper (163) is moved from the engaged position to the retracted position by a load beyond a predetermined value.


Documents:

1987-CHE-2007 AMENDED CLAIMS 03-08-2011.pdf

1987-che-2007 form-3 03-08-2011.pdf

1987-CHE-2007 OTHER PATENT DOCUMENT 03-08-2011.pdf

1987-CHE-2007 POWER OF ATTORNEY 03-08-2011.pdf

1987-CHE-2007 EXAMINATION REPORT REPLY RECEIVED 03-08-2011.pdf

1987-che-2007-abstract.pdf

1987-che-2007-claims.pdf

1987-che-2007-correspondnece-others.pdf

1987-che-2007-description(complete).pdf

1987-che-2007-drawings.pdf

1987-che-2007-form 1.pdf

1987-che-2007-form 18.pdf

1987-che-2007-form 3.pdf

1987-che-2007-form 5.pdf


Patent Number 249203
Indian Patent Application Number 1987/CHE/2007
PG Journal Number 41/2011
Publication Date 14-Oct-2011
Grant Date 11-Oct-2011
Date of Filing 05-Sep-2007
Name of Patentee KUBOTA CORPORATION
Applicant Address 2-47, SHIKITSUHIGASHI 1-CHOME NANIWA-KU OSAKA-SHI OSAKA
Inventors:
# Inventor's Name Inventor's Address
1 ADACHI, NORIFUMI C/O KUBOTA CORPORATION SAKAI SEIZOSHO 64, ISHIZUKITAMACHI SAKAI-KU SAKAI-SHI OSAKA
2 TSUBOKURA, SATOSHI C/O KUBOTA CORPORATION SAKAI SEIZOSHO 64, ISHIZUKITAMACHI SAKAI-KU SAKAI-SHI OSAKA
PCT International Classification Number B62D 55/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 2007-9245 2007-01-18 Japan
2 2007-9244 2007-01-18 Japan
3 2007-77511 2007-03-23 Japan