JP4194096B2 - 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.

  For example, the work vehicle disclosed in Patent Document 1 includes a loading platform (5 in FIG. 4 of Patent Literature 1) at the rear, and a wall portion (FIG. 80 in 2 and 3 is supported so as to be swingable and openable around a horizontal axis core (81 in FIGS. 2 and 3 of Patent Document 1) below the wall portion.

As described above, when the wall portion is supported so as to be swingable and openable, a structure for holding the wall portion in the closed position is required. In the structure of Patent Document 1, the lock member (82 in FIGS. 1 and 2 of Patent Document 1) is slidable in parallel with the horizontal axis (81 in FIGS. 2 and 3 of Patent Document 1). Provided with a spring (83 in FIG. 1 of Patent Document 1) for urging the lock member toward the protruding side.
Thus, when the wall is operated to the closed position, the guide member (72 in FIGS. 1, 2, and 3 of Patent Document 1) contacts the end of the lock member, and the lock member retreats against the spring. The lock member is again slid to the protruding side by the spring, the lock member is engaged with the holding portion (72a in FIG. 1 of Patent Document 1), and the wall portion is held in the closed position. The

JP 2001-260949 A (FIGS. 1, 2, 3, and 4)

The present invention improves the operability of the lock member in the platform of the work vehicle when the wall portion located on the outer periphery of the platform is supported so as to be swingable and openable around the lower horizontal axis in the platform structure of the work vehicle. It is an object.

[I]
(Constitution)
The first feature of the present invention resides in the following structure in the platform structure of a work vehicle.
The wall part located on the outer periphery of the loading platform is supported so as to be swingable around the lower horizontal axis, and the cross-sectional shape of the upper end of the wall is extended from the upper end of the inner plate of the wall to the outside of the loading platform. An upper surface plate and an outer surface plate extending downward from the outer end of the upper surface plate are provided, and the cross section is configured such that the lower portion is open. A pin is provided between the outer surface plate and the inner surface plate of the wall portion that intersects the horizontal axis and extends around the axis of the wall portion along the swinging direction of the wall portion . A lock member is provided that can swing around the axis of the pin . The artificial operation tool for artificially swinging the lock member is directed from the lock member toward the center of the wall so that it is exposed below the outer plate of the wall with the wall positioned in the closed position. Extend. A holding portion which the locking member is so walls engaged is held in the closed position, Ru provided with a spring for urging the lock member to the protruding side which engages the holding portion.

(Function)
According to the first feature of the present invention, since the lock member and the artificial operation tool are provided at the upper end portion of the wall portion, for example, the operator holds the upper end portion of the wall portion to open the wall portion and When operating in the closed position, the operator can hold the manipulator together with the upper end of the wall, and the manipulator can swing the lock member manually. it can.

In this case, according to the first feature of the present invention, an artificial operation is performed from the lock member toward the center of the wall portion so as to be exposed below the outer surface plate of the wall portion in a state where the wall portion is in the closed position. Since the tool is extended, the artificial operating tool does not protrude upward from the wall portion.

(The invention's effect)
According to the first feature of the present invention, for example, when an operator holds the upper end of the wall and operates the wall to the open position and the closed position, when the operator holds the upper end of the wall. It is possible to have a human operation tool together, and it is possible to artificially swing the lock member with the human operation tool, thereby improving the operability of the lock member in the loading platform of the work vehicle. .

According to the first feature of the present invention, since the artificial operation tool does not protrude upward from the wall portion, the artificial operation tool protruding upward from the wall portion does not get in the way.

[II]
(Constitution)
The second feature of the present invention resides in the following structure in the work bed structure of the working vehicle of the first feature of the present invention.
The end of the lock member is brought into contact with the end of the lock member when the wall is closed, and the end of the lock member is pushed obliquely downward on the retracting side or obliquely upward on the retracting side. And a guide member that swings on the retracting side. After the lock member is swung to the retreat side by the guide member, the lock member is swung to the protrusion side by the spring and engaged with the holding portion.

(Function)
According to the second feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
According to the second feature of the present invention, the lock member is swingably supported on the retreat side and the projecting side around the axis of the wall, and the lock member is retreated and retreated as in the structure of Patent Document 1. Compared to the configuration in which the sliding operation is performed on the protruding side, the lock member is smoothly swung on the retracting side and the protruding side.
When the lock member is swingably supported on the retracted side and the projecting side around the axis of the wall, when the lock member is swung to the retracted side at the closed position of the wall, the end of the lock member protrudes Instead of moving linearly from the position on the side to the retracting side on the side, the end of the lock member moves obliquely downward on the retracting side or obliquely upward on the retracting side.
According to the second feature of the present invention, the guide member for swinging the lock member to the retracting side against the spring in accordance with the operation of the wall portion to the closed position is provided. When the end of the lock member comes into contact with the guide member in accordance with the operation, the end of the lock member is moved obliquely downward (or obliquely on the retract side) by the guide member along with the operation to the closed position of the wall portion. The lock member is swung to the retracted side by being pushed upward.
Thus, according to the second feature of the present invention, when the lock member is swung to the retracting side, the guide member pushes the end of the lock member along the movement locus. The end of the lock member is pushed by the guide member and the lock member is smoothly swung to the retracting side without causing the ends of the lock member and the end of the lock member to rub.

(The invention's effect)
According to the second feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the second feature of the present invention, in the loading platform structure of the work vehicle, when the wall portion positioned on the outer periphery of the loading platform is supported so as to be swingable openable and closable around the lower horizontal axis, the lock member is disposed on the axis of the wall. By swingably supporting the retreat side and the projecting side around the lock member, the lock member can be smoothly operated to the retreat side and the projecting side, improving the operability of the lock member on the platform of the work vehicle. I was able to.
According to the second feature of the present invention, when the lock member is swingably supported on the retracting side and the projecting side around the axis of the wall, the guide is provided when the lock member is swung to the retracting side. The end of the lock member is pushed by the member so as to follow the movement trajectory, and the end of the lock member is pushed without causing the guide member and the end of the lock member to be twisted together, so that the lock member is smoothly retracted. It can be configured to swing on the entry side, and the operability of the lock member in the platform of the work vehicle can be improved.

[III]
(Constitution)
The third feature of the present invention resides in the following structure in the platform structure of the work vehicle according to the first or second feature of the present invention.
The wall portion includes an engaging member that engages with the fixing portion on the holding portion side while covering the holding portion from above at the closed position of the wall portion and prevents the fixing portion on the holding portion side from separating from the wall portion. .

(Function)
According to the third feature of the present invention, the “action” described in the preceding item [I] [II] is provided in the same manner as the first or second feature of the present invention. In addition, the following “action” is provided. It has.
According to the third feature of the present invention, in the closed position of the wall portion, the engaging member provided on the wall portion engages with the fixing portion on the holding portion side, and the fixing portion on the holding portion side is separated from the wall portion. It is blocked by the engaging member, and in the closed position of the wall portion, the wall portion and the fixing portion on the holding portion side are coupled with each other with sufficient strength.

  In this case, according to the third feature of the present invention, at the closed position of the wall portion, the engaging member provided on the wall portion is engaged with the fixing portion on the holding portion side while covering the holding portion from above. For example, when mud or soil is applied from the upper side, mud and soil are less likely to adhere to the holding portion. Thereby, the state said that it becomes difficult for a lock member to engage with a holding | maintenance part because mud and dirt adhere to a holding | maintenance part decreases.

(The invention's effect)
According to the third feature of the present invention, the “effect of the invention” described in the preceding paragraphs [I] and [II] is provided in the same manner as the first or second feature of the present invention. The effect of the invention is provided.
According to the third feature of the present invention, at the closed position of the wall portion, the wall portion and the fixing portion on the holding portion side are connected to each other with sufficient strength, thereby improving the rigidity of the loading platform of the work vehicle. did it.

  According to the third feature of the present invention, in the closed position of the wall portion, for example, when mud or soil is applied from the upper side, mud and soil are less likely to adhere to the holding portion, and mud and soil are retained. The state that it becomes difficult for the lock member to be engaged with the holding portion by adhering to the portion is reduced, and the reliability of the operation of the lock member in the platform of the work vehicle can be improved.

[IV]
(Constitution)
The fourth feature of the present invention resides in the following structure in the work bed structure of the working vehicle of the third feature of the present invention.
An elastic body is attached to the engaging member or the fixing portion on the holding portion side at a portion where the engaging member and the fixing portion on the holding portion side are in contact with each other.

(Function)
According to the fourth feature of the present invention, the “action” described in the preceding paragraphs [I] to [III] is provided in the same manner as the third feature of the present invention. In addition, the following “action” is provided. ing.
According to the fourth feature of the present invention, when the engaging member provided on the wall portion is engaged with the fixing portion on the holding portion in the closed position of the wall portion as described in [III] above, the engaging member Since the elastic body is located at the part where the holding part and the fixing part on the holding part contact, even if the wall part and the fixing part on the holding part side are loose due to vibration during traveling of the work vehicle, the wall part and the holding part The loose sound between the fixed portions on the side is suppressed by the elastic body.

(The invention's effect)
According to the fourth feature of the present invention, as in the third feature of the present invention, the “effect of the invention” described in the preceding paragraphs [I] to [III] is provided. In addition, the following “invention” is provided. Effect.
According to the fourth feature of the present invention, at the closed position of the wall portion, the rattling sound between the wall portion and the fixed portion on the holding portion side is suppressed by the elastic body, and noise during traveling of the work vehicle is reduced. I was able to reduce it.

  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 steering handle 7 and a seat 8 for steering the front wheel 1 are provided in the driving unit 5, and frames 9 are provided on the right and left sides of the front part of the driving unit 5. The frame 10 is 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, and a rear wall portion 17, and a rear wheel fender 18 is provided with the bottom plate portion 14. The cargo bed 6 and the rear wheel fender 18 are configured to be swingable up and down around the horizontal axis at the rear of the machine body by the 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-like frame 20 is fixed vertically on the rear portions of the right and left lateral wall portions 16, and a bracket 21 is fixed on the lower portion of the frame 20. A rear wall 17 is supported around the horizontal axis P1 of the bracket 21 in the left-right direction of the machine body so as to be able to swing open and close. As shown in FIGS. 3 (b), 4, and 7, a guide member 22 formed of a plate member is fixed to the upper portion of the frame 20. A concave portion 22a (corresponding to a holding portion) is formed in the lower side portion of the guide member 22, and an upper portion 22b (corresponding to a fixing portion on the holding portion side) 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. 5, 6, and 7, 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. Is in a state along the swinging direction of the rear wall portion 17 intersecting the horizontal axis P1. The upper portion 17a of the rear wall portion 17 includes an upper surface plate 17B extending from the upper end of the inner surface plate 17A of the rear wall portion 17, and an outer surface plate 17C extending downward from the upper surface plate 17B. . As shown in FIGS. 4 and 6, the upper portion 17e (corresponding to the engaging member) of the lateral portion 17b of the lateral portion 17 of the rear wall portion 17 is folded laterally outward and folded downward, and the rear wall An elastic body 28 made of synthetic resin (or hard rubber) is attached to the upper portion 17 e of the lateral portion 17 b of the portion 17.

  As shown in FIGS. 5, 6, and 7, a boss portion 24 is rotatably fitted around an axis P <b> 2 of the pin 23, and a lock member 25 formed by bending a round bar member into an L shape is a boss portion 24. A round bar-shaped operation lever 26 (corresponding to an artificial operation tool) 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. 6 by the spring 27 fitted on the pin 23 (the end of the lock member 25 is the opening 17c of the lateral portion 17b of the rear wall portion 17). Urging in the direction protruding from the head).

  The state shown in FIG. 3B is a state in which the rear wall portion 17 is located at the open position. A wire 29 is attached to the lateral portion 17b of the rear wall portion 17, and a hook member 30 is fixed to the frame 20, and the end portion of the wire 29 is hooked on the hook member 30 so that the rear wall portion 17 is held in the open position. Is done. By removing the end portion of the wire 29 from the hook member 30, the rear wall portion 17 can be swung from the open position shown in FIG. In the state in which the rear wall portion 17 is operated to the open position, as shown in FIGS. 3B and 6, the lock member 25 and the operation lever 26 are moved to the protruding side (around the axis P2 in FIG. 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 portion 17 is operated to the closed position, as shown in FIG. 8, the end of the lock member 25 comes into contact with the rear portion 22d of the guide member 22, and the rear portion 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 retreating side (counterclockwise in FIG. 8 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, the end of the lock member 25 is retracted laterally from the protruding side position as shown in FIG. 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 7, 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. 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. 7, 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 7, 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.

  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 16 together. 25 can be swung to the retreating side (counterclockwise in FIG. 7 around the axis P2) against the spring 27, and thereafter the rear wall 17 can be operated to the open position. it can.

[First Alternative Embodiment of the Invention]
5, 6, and 7 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 outward (see FIG. 5). 6 and the lock member 25 of FIG. 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. 7, the rear portion 22d of the guide member 22 is turned upside down from the state shown in FIG. 7 (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. . In such a configuration, the lock member 25 and the operation lever 26 shown in FIGS. 4 and 7 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.

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 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 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

Explanation of symbols

6 Loading platform 17 Wall portion 17a Upper portion of wall portion 17e Engagement member
17A inner plate
17B Top plate
17C outer surface plate 22 guide member 22a holding part 22b holding part side fixing part
23 Pin 25 Lock member 26 Artificial operation tool 27 Spring 28 Elastic body P1 Horizontal shaft core P2 Shaft core

Claims (4)

Supports the wall located on the outer periphery of the loading platform so that it can swing freely around the lower horizontal axis,
The cross-sectional shape of the upper end portion of the wall portion includes an upper surface plate extending outward from the upper end of the inner surface plate of the wall portion and an outer surface plate extending downward from the outer end of the upper surface plate. , Configured in a cross-sectional shape with the bottom open,
A pin around the axis of the wall that intersects the horizontal axis and extends in the swinging direction of the wall is provided between the outer surface plate and the inner surface plate of the wall,
An artificial operating tool that includes a lock member that is swingable around an axis of the pin and that artificially swings the lock member is provided on the wall portion with the wall portion in a closed position. Extending from the lock member toward the center of the wall so as to be exposed below the outer plate,
A loading platform for a work vehicle, comprising a holding portion that engages the lock member and holds the wall portion in a closed position, and a spring that biases the lock member on a protruding side that engages with the holding portion. Construction. The lock member is brought into contact with the end of the lock member in accordance with the operation to the closed position of the wall, and the end of the lock member is pushed obliquely downward on the retracted side or obliquely upward on the retracted side, and the lock Provided with a guide member that swings the member against the spring against the spring,
2. The structure according to claim 1 , wherein after the lock member is swung to the retracted side by the guide member, the lock member is swung to the protruding side by a spring and engaged with the holding portion . Work vehicle carrier structure.   An engaging member that engages with a holding portion-side fixing portion while covering the holding portion from above at the closed position of the wall portion and prevents the holding portion-side fixing portion from separating from the wall portion, The platform structure for a work vehicle according to claim 1 or 2, wherein   The platform structure for a work vehicle according to claim 3, wherein an elastic body is attached to the engaging member or the fixing portion on the holding portion side at a portion where the engaging member and the fixing portion on the holding portion side are in contact with each other.

Images