JP4568666B2 - Platform structure of work vehicle - Google Patents

Description

  The present invention relates to a structure of a loading platform in a work vehicle including wheels and a crawler traveling device.

  Patent Document 1 discloses a structure in which a rear wall portion located on the outer peripheral portion of a loading platform is supported so as to be swingable and openable around a horizontal axis of the loading platform as a loading platform structure for a work vehicle. The other wall part of the loading platform is provided with a connecting part for detachably connecting the ring part of the wire connected to the rear wall part, and the rear wall part is held in the open position by the wire. Will be. For example, in the cargo bed structure described in Patent Document 1 as shown in FIG. 12A, the connection portion 50 provided in the cargo bed 55 has a hook member, and the wire 52 connected to the rear wall portion 51 has. By hooking the ring portion 53 on the hook member 50, the rear wall portion 51 is held in the open position by the other wall portion 54 and the wire 52.

JP 2005-199750 A

  In the structure of the connecting portion 50 having the hook member described in Patent Document 1, as shown in FIG. 12B, the ring portion 53 may be held while being hooked on the hook member 50 in a twisted state. This is because the ring portion 53 can move in all directions such as up, down, left and right while being connected to the hook member 50. Therefore, particularly, the wire 52 near the base of the ring portion 53 is bent, and there is a possibility that the load concentrates on the bent portion to cause metal fatigue.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a platform structure for a work vehicle that can prevent the connecting wire holding the wall portion that swings and opens in an open position with respect to the platform from being bent. There is in point to do.

Characteristic feature of the bed structure of the working vehicle according to the present invention for achieving the above object, the swing openably supports the wall portion located on an outer peripheral portion of the loading platform to the horizontal axis around the leading SL cargo bed, the wall part one end ring portion is provided on the other end of the connected connecting wires, the connecting portion for detachably connecting said ring portion is a bed structure of the working vehicle provided with other wall portion,
The connecting portion is a housing portion in which an inner space is formed by an inner wall and an outer wall, and rotatably supports the ring portion, and projects in a direction parallel to the horizontal axis from the inner wall toward the outer wall. With a pin portion to
The outer wall of the housing part is formed with a notch for attaching / detaching the ring part to / from the pin part along the axial direction of the pin part, and the notch part allows the ring of the ring part to pass therethrough. A ring hole, and a clamp notch formed by notching the ring hole below the ring hole through which the clamp of the ring sandwiching the wire portion of the connection wire is passed,
The outer wall of the housing part is formed with a restricting part for restricting movement of the ring part in the axial direction of the pin part in a state of being attached to the pin part .

According to the above characteristic configuration, the ring portion can be rotated around the pin portion while being attached to the pin portion protruding in a direction parallel to the horizontal axis, so that the ring portion is swung around the horizontal axis. The wall portion that rotates and the ring portion that rotates around the pin portion rotate in parallel with each other. That is, it is ensured that the ring portion does not move so as to be twisted with respect to the wall portion. Therefore, since the ring portion and the connection wire are not twisted with respect to the wall portion, there is no problem that the connection wire is bent as in the conventional case.
Therefore, it is possible to provide a platform structure for a work vehicle that can prevent the connection wire that holds the wall portion that swings open and close from being opened relative to the platform.

Further, the housing portion covers the periphery of the pin portion, and a restricting portion for restricting movement of the pin portion of the ring portion in the axial direction when attached to the pin portion is formed . That is, the ring part is restricted from coming off from the pin part when rotating around the pin part. Accordingly, since the connection wire can be prevented from being detached from the connection part (loading platform), the wall part can be continuously held by the connection wire.

Further, the cutout portion, it provides a space for allowing attaching and detaching the ring portion to the pin portion via the notch, facilitates the attachment and detachment of the pin portion of the ring portion. Therefore, a special part for attaching and detaching the ring portion is unnecessary.

  As shown in FIGS. 1 and 2, a front guard 3 and a bonnet 4 are provided at the front of the airframe supported by a pair of left and right front wheels 1 and a pair of left and right rear wheels 2. 5 is provided, and a loading platform 6 is provided at the rear part of the machine body to constitute a four-wheel drive type work vehicle.

  As shown in FIGS. 1 and 2, a driving handle 7 and a seat 8 for steering the front wheel 1 are provided in the driving unit 5. Frames 9 are provided on the right and left sides of the front part of the driving unit 5, and frames 10 are provided on the right and left sides of the rear part of the driving unit 5. A blinker 11 is attached to the frame 9, a roof 12 is attached over the upper portions of the frames 9 and 10, and a mesh 13 is attached to the frame 10.

  As shown in FIGS. 1 and 2, the loading platform 6 includes a bottom plate portion 14, a front wall portion 15, right and left lateral wall portions 16 (corresponding to “other wall portions” of the present invention), a rear wall portion 17 (main book). The rear wheel fender 18 is attached to the bottom plate portion 14 and corresponds to the “wall portion” of the invention. The loading platform 6 and the rear wheel fender 18 are configured to be swingable up and down around a horizontal axis at the rear of the machine body by a hydraulic cylinder 19. The front wall portion 15 is connected to the bottom plate portion 14, the right and left lateral wall portions 16 are connected to the bottom plate portion 14, and the front wall portion 15 and the right and left lateral wall portions 16 are connected.

  As shown in FIGS. 3 (a) and 3 (b), in the loading platform 6, a square pipe-shaped frame 20 is fixed vertically on the rear portions of the right and left lateral wall portions 16, and a bracket 21 is mounted on the lower portion of the frame 20. Is fixed, and the rear wall portion 17 is swingably supported around the horizontal axis P1 of the bracket 21 in the left-right direction of the machine body. As shown in FIGS. 3B, 6, and 9, a guide member 22 formed of a plate member is fixed to the upper portion of the frame 20. A recess 22a is formed in the lower side of the guide member 22, and an upper portion 22b of the guide member 22 is bent laterally outward. A rear portion 22d of the guide member 22 is bent laterally outward along an oblique fold line 22c of the guide member 22. Accordingly, the rear portion 22d of the guide member 22 is in a state of being inclined obliquely toward the center side of the rear wall portion 17 in the obliquely rearward downward direction.

As shown in FIGS. 7, 8, and 9, the upper portion 17 a of the rear wall portion 17 is bent downward, and the pins 23 are attached to the right and left ends of the upper portion 17 a of the rear wall portion 17. The direction of the pin 23 intersects the horizontal axis P1 and is in a state along the swinging direction of the rear wall portion 17. As shown in FIGS. 6, 8, and 9, the upper portion 17 e of the lateral portion 17 b of the rear wall portion 17 is bent laterally outward and bent downward, and the upper portion of the lateral portion 17 b of the rear wall portion 17. An elastic body 28 made of synthetic resin (made of hard or soft rubber) is attached to 17e.
FIG. 10 is a cross-sectional view taken along line XX ′ in FIG. As shown in the figure, the cross-sectional shape of the elastic body 28 is a scallop shape having a protruding portion 28a protruding in the direction of the horizontal portion 17b of the rear wall portion 17.

  As shown in FIGS. 7, 8, and 9, a boss portion 24 is rotatably fitted around an axis P2 of the pin 23, and a lock member 25 formed by bending a round bar member into an L shape is a boss. A round bar-shaped operation lever 26 is fixed to the boss portion 24. Thereby, the lock member 25 and the operation lever 26 are integrally supported so as to be swingable around the axis P2, and the end of the lock member 25 faces the opening 17c of the lateral portion 17b of the rear wall portion 17, The lock member 25 and the operation lever 26 are moved around the axis P2 in the clockwise direction in FIG. 8 (the end of the lock member 25 is the opening 17c of the lateral portion 17b of the rear wall portion 17) by the spring 27 fitted on the pin 23. Urging in the direction protruding from the head).

As shown in FIGS. 3A and 3B, the connection wire 41 includes a first ring portion 42, a wire portion 29, and a second ring portion 43. A connection pin 40 is provided on the lateral portion 17 b of the rear wall portion 17, and the connection pin 40 is inserted into a first ring portion 42 provided at one end of the connection wire 41 to connect the connection pin 40 and the first connection pin 40. Connection with the 1 ring portion 42, that is, connection between the connection wire 41 and the rear wall portion 17 is performed. The first ring portion 42 can rotate around the connection pin 40. Further, since the connection pin 40 protrudes in a direction parallel to the horizontal axis P1, the rotation surface of the first ring portion 42 with respect to the connection pin 40 is parallel to the swing rotation surface of the rear wall portion 17 with respect to the loading platform. is there. That is, the movable direction of the first ring portion 42 with respect to the rear wall portion 17 is limited to the direction along the rotation surface of the first ring portion 42 with respect to the connection pin 40. Accordingly, the first ring portion 42 does not move so as to be twisted with respect to the rear wall portion 17.
A second ring portion 43 (corresponding to the ring portion of the present invention) is provided at the other end of the connection wire 41. The second ring portion 43 is connected to the loading platform 6 at a connection portion 30 provided on the frame 20 of the loading platform 6.

4 is a perspective view of a state in which the second ring portion 43 is connected to the connection portion 30 and the rear wall portion 17 is held in the open position. FIG. 5 is a view in which the second ring portion 43 is attached to the connection portion 30. FIG. As shown, connecting unit 30, obtain Preparations a housing portion 31 which inner space 34 is formed by the inner wall 31A and outer wall 31B, and a pin portion 32 disposed on the inner wall 31A of the housing portion 31. And the pin part 32 is located in the internal space 34, and protrudes in the direction parallel to the horizontal axis P1 of the loading platform 6. And the connection part 30 protrudes from the loading platform 6 in the direction in which the rear wall part 17 falls down. The second ring portion 43 includes a clamp 45 that sandwiches the wire portion 29 and a ring 44 that is integrally formed with the clamp 45 and has a ring hole 46. When the rear wall portion 17 is moved to the open position, the wire portion 29 is also pulled by the rear wall portion 17 and moves away from the connection portion 30.

  As shown in FIG. 4, in a state where the ring 44 of the second ring portion 43 is connected to the pin portion 32 of the connection portion 30, the second ring portion 43 is also positioned in the internal space 34 of the housing portion 31, The movement range of the ring portion 43 is restricted by the housing portion 31. In this embodiment, the housing part 31 is comprised so that the internal space 34 may be formed using a U-shaped member.

The outer wall 31B of the housing part 31 is formed with a notch part 35 that allows the second ring part 43 to be attached to and detached from the pin part 32 along a direction parallel to the horizontal axis P1 . The notch 35 is sized to allow the second ring part 43 to pass therethrough. A ring hole 35A through which the ring 44 is passed, and a clamp notch formed on the lower side of the ring hole 35A. It is comprised with the notch part 35B. As shown in FIG. 5, the second ring portion 43 is attached to and detached from the pin portion 32 through the notch portion 35. Thus, the notch 35 provides a space that allows the second ring portion 43 to be attached to and detached from the pin portion 32, so that the second ring portion is provided via the notch 35. 43 can be easily attached to and detached from the pin portion 32. Therefore, special parts for attaching and detaching the second ring portion 43 and the pin portion 32 are unnecessary.

Furthermore, the housing part 31 includes a restricting part 33 that can restrict the movement of the pin part 32 in the axial direction of the second ring part 43 attached to the pin part 32 . Specifically, as shown in FIG. 4, even if the second ring portion 43 attached to the pin portion 32 is about to move in the axial direction of the pin portion 32 , the clamp 45 is connected to the housing portion 31 (restriction). And the movement thereof is restricted . In other words, in the state where the connecting wire 41 is attached to the connecting portion 30, the second ring portion 43 of the connecting wire 41 is rotatable about the pin portion 32, without departing from the pin portion 32 by the regulating portion 33 Is in a state. Therefore, the rear wall 17 can be reliably held at the open position by using the connection wire 41.

  Further, by removing the second ring portion 43 of the connection wire 41 from the connection portion 30, the rear wall portion 17 is swung from the open position shown in FIGS. You can also. In the state where the rear wall portion 17 is operated to the open position, as shown in FIGS. 3B and 9, the lock member 25 and the operation lever 26 are moved to the protruding side (around the axis P2 of FIG. 9 by the spring 27). The end of the lock member 25 protrudes from the opening 17c of the lateral portion 17b of the rear wall portion 17 by being swung in the clockwise direction on the paper surface.

  Next, as shown in FIG. 3 (a), when the rear wall 17 is operated to the closed position, the end of the lock member 25 comes into contact with the rear portion 22d of the guide member 22 as shown in FIG. As the wall portion 17 is moved to the closed position, the end portion of the lock member 25 moves along the rear portion 22d of the guide member 22, and the end portion of the lock member 25 is moved toward the retracting side by the rear portion 22d of the guide member 22. By being pushed obliquely downward, the lock member 25 and the operation lever 26 are swung in the retracted side (counterclockwise in FIG. 11 around the axis P2) against the spring 27.

  In this case, since the lock member 25 and the operation lever 26 are supported so as to be swingable around the axis P2, as shown in FIG. 11, the end of the lock member 25 is retracted laterally from the protruding side position. Instead of linearly moving to the entry side, the end of the lock member 25 moves obliquely downward on the entry side. Accordingly, since the rear portion 22d of the guide member 22 is obliquely rearward and downward and is inclined obliquely toward the center side of the rear wall portion 17, the lock member 25 along the rear portion 22d of the guide member 22 as described above. When the end portion of the locking member 25 moves, the end portion of the locking member 25 moves along the rear portion 22d of the guide member 22, and the end portion of the locking member 25 shifts laterally along the rear portion 22d of the guiding member 22. It won't move.

  Next, as shown in FIGS. 3A and 9, when the lock member 25 reaches the recess 22 a of the guide member 22, the lock member 25 and the operation lever 26 are moved by the spring 27 to the protruding side (around the axis P <b> 2, as shown in FIG. 9). The lock member 25 enters the recess 22a of the guide member 22 and the rear wall portion 17 is held in the closed position. As shown in FIG. 9, in a state where the rear wall portion 17 is located at the closed position, the operation lever 26 extends obliquely downward and is exposed obliquely downward from the upper portion 17 a of the rear wall portion 17.

  As shown in FIGS. 3A and 9, the upper portion 17 e of the lateral portion 17 b of the rear wall portion 17 covers the guide member 22 (concave portion 22 a) from the upper side in a state where the rear wall portion 17 is located at the closed position. However, the elastic body 28 comes into contact with the upper portion 22 b of the guide member 22. As a result, the rear wall portion 17 and the right and left lateral wall portions 16 are connected to each other with sufficient strength, and the state in which the right and left lateral wall portions 16 attempt to open laterally outward is suppressed. When mud or soil is applied from the upper side, mud or soil is less likely to adhere to the recess 22a and the lock member 25 of the guide member 22. Even if the rear wall portion 17 and the right and left lateral wall portions 16 are rattled due to vibration during the traveling of the work vehicle, the rattling noise between the rear wall portion 17 and the right and left lateral wall portions 16 is elastic. It is restrained by the body 28.

  Further, the contact portion between the elastic body 28 and the upper portion 22b of the guide member 22 starts to come into contact with the end portion 28b of the elastic body 28, and finally moves relative to the protruding portion 28a of the elastic body 28. In this process, the upper portion 22b of the guide member 22 is pressed in the direction of the lateral portion 17b of the rear wall portion 17. As a result, the gap between the upper portion 22b of the guide member 22 and the lateral portion 17b of the rear wall portion 17 is reduced (or eliminated), and the upper portion 22b of the guide member 22 is rattled and vibration noise is thereby generated. Can be prevented. Furthermore, it is preferable to form the elastic body 28 from a soft material because the elastic body 28 is not broken. Furthermore, when the elastic body 28 is formed of a soft material, the elastic body 28 strongly holds the upper portion 17e of the lateral portion 17b of the rear wall portion 17 by the elastic force (contraction force), and the elastic body 28 does not fall off. You can

  Next, when operating the rear wall portion 17 to the open position, for example, the operator holds the end portion of the upper portion 17a of the rear wall portion 17 and swings upward by holding the operation lever 26 together. 25 can be swung to the retreat side (counterclockwise in FIG. 9 around the axis P2) against the spring 27, and the rear wall 17 can be operated to the open position after this. it can.

[First Alternative Embodiment of the Invention]
7, 8, and 9 of the above-mentioned [Best Mode for Carrying Out the Invention], the lock member 25 may be configured to extend upward from the boss portion 24 and extend laterally outward. (A state in which the lock member 25 in FIGS. 8 and 9 is turned upside down). If comprised in this way, the edge part of the locking member 25 will not move linearly from the position of a protrusion side to the horizontal retreating side, but the edge part of the locking member 25 will move diagonally upward on the retreating side. 9, the rear portion 22d of the guide member 22 is turned upside down from the state shown in FIG. 9 (the rear portion 22d of the guide member 22 is inclined obliquely upward and obliquely toward the center side of the rear wall portion 17). Status).

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment], the right and left lateral wall portions 16 may be configured to be swingable and openable around the lower horizontal axis. . When configured in this manner, the lock member 25 and the operation lever 26 shown in FIGS. 6 and 9 are provided on the right and left lateral wall portions 16, and the guide member 22 is provided on the front wall portion 15.
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Another Mode of Carrying Out the Invention] [Second Another Mode of Carrying Out the Invention], the elastic body 28 is placed on the upper part 17e of the lateral part 17b of the rear wall part 17. Instead, it may be configured to be attached to the upper part 22 b of the guide member 22.

[ Third Another Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], the specific example of the shape of the restricting portion 33 provided in the housing portion 31 has been described, but the shape is the second ring portion attached to the pin portion 32. if structure capable restrict the movement of 43 the axial direction of the pin portion 32 of the may be other shapes.

Overall perspective view of work vehicle Overall side view of work vehicle Side view showing a state in which the rear wall is operated to a closed position and an open position A perspective view of a state in which the second ring portion is connected to the connecting portion and the rear wall portion is held in the open position. A perspective view when attaching the second ring part to the connection part Side view of the vicinity of the guide member with the rear wall operated to the closed position Longitudinal side view of the rear wall near the lock member Longitudinal rear view of the vicinity of the lock member with the rear wall operated to the open position Rear view of the vicinity of the lock member and guide member when the rear wall is operated to the closed position Cross section of elastic body along line X-X 'in FIG. Rear view of the vicinity of the lock member showing a state in which the lock member is swung to the retracted side when operating the rear wall portion from the open position to the closed position The side view which shows the state which operated the rear wall part to the open position in the loading platform structure of the conventional work vehicle

6 Loading platform 16 Wall (other wall)
17 Wall (rear wall)
29 Wire part 30 Connection part 31 Housing part
31A inner wall
31B Outer wall 32 Pin part
33 Restricting part 34 Internal space 35 Notch
35A Ring hole
35B Clamp Notch 41 Connection Wire 43 Second Ring (Ring)
44 rings
45 Clamp P1 Horizontal axis

Claims (1)

The wall portion located on an outer peripheral portion of the loading platform swings openably supported on the horizontal axis around the leading Symbol bed, the ring portion is provided on the other end of the connecting wire whose one end is connected to the wall portion, the A connection part for detachably connecting the ring part is a platform structure of a work vehicle provided on another wall part,
The connecting portion is a housing portion in which an inner space is formed by an inner wall and an outer wall, and rotatably supports the ring portion, and projects in a direction parallel to the horizontal axis from the inner wall toward the outer wall. With a pin portion to
The outer wall of the housing part is formed with a notch for attaching / detaching the ring part to / from the pin part along the axial direction of the pin part, and the notch part allows the ring of the ring part to pass therethrough. A ring hole, and a clamp notch formed by notching the ring hole below the ring hole through which the clamp of the ring sandwiching the wire portion of the connection wire is passed,
A work bed structure for a work vehicle, wherein a restriction portion for restricting movement of the pin portion in the axial direction of the pin portion when attached to the pin portion is formed on an outer wall of the housing portion .

Images