JP6966351B2 - Dump truck - Google Patents

Description

The present invention relates to a dump truck having an opening / closing gate in which a part of the vertical plate can be opened / closed, and particularly relates to a configuration for locking the opening / closing gate.

Conventionally, for example, as in Patent Document 1, a floor plate and a vertical plate erected over the entire outer periphery of the floor plate are provided, and the lower hinge is used as a fulcrum to rotate from above to downward to open upward. On the other hand, there is known a dump truck having a loading platform in which an opening / closing gate that rotates upward from above to a fulcrum with a lower hinge as a fulcrum and opens upward is composed of a part of the vertical plate.

Japanese Patent No. 4452142 (particularly FIG. 4)

In such a dump truck, when dumping a load in the upward open state, a hinge component that functions as a hinge when the load is opened downward jumps out to a place where the load of the opening / closing gate passes. There is a problem that the load comes into contact with the hinge component.

Therefore, it is necessary to prevent the hinge component of the opening / closing gate and the locking member that keeps the opening / closing gate in the closed state from popping out on the surface through which the load of the opening / closing gate passes. Then, the lock member is provided on the outer surface opposite to the bottom plate of the opening / closing gate.

On the other hand, if the load is overloaded, the load on the load may be applied to the opening / closing gate, making it difficult to open. For this reason, if the size of the component parts of the lock member is increased in order to improve operability, there is a problem that the lock member provided on the outer surface is likely to come into contact when dumping and loading into another container, hopper car, or the like. be.

The present invention has been made in view of this point, and an object of the present invention is to enable easy and reliable locking and unlocking of an opening / closing gate without increasing the size as much as possible.

In order to achieve the above object, in the present invention, the structure of the bar member is devised.

Specifically, in the first invention, an opening / closing gate is provided which includes a bottom plate and a plurality of vertical plates erected on the bottom plate, and a part of the plurality of vertical plates rotates and opens upward. It is assumed that a dump truck is equipped with a loading platform.

And the above dump truck
A bar member housed on the outer surface of the opening / closing gate opposite to the bottom plate,
A bar support portion provided on the outer surface and supporting the bar member so as to be slidable, and a bar support portion.
A locked member provided on the vertical plate adjacent to the opening / closing gate and holding the opening / closing gate in the closed position with the tip end side of the bar member locked.
It is provided at a position away from the bar support portion on the outer surface, and includes a sheath member that accommodates the base end side of the bar member.

According to the above configuration, the bar member, the bar support portion, and the sheath member are provided on the outer peripheral surface opposite to the bottom plate of the opening / closing gate, so that the load may be caught on these when the opening / closing gate is opened for dumping work. There is no. Further, since these members do not protrude from the opening / closing gate, they do not come into contact with each other when loading a load into a container, a hopper car, or the like. Further, since the bar member is housed in the sheath member, the bar member does not wobble even if the size of the bar member is increased. Further, if the size of the bar member can be increased, it is easy to open the opening / closing gate even when pressure is applied from the load.

In the second invention, in the first invention,
A recess is formed on the outer surface.
The bar member, the bar support portion, and the sheath member are provided inside the recess.

According to the above configuration, by accommodating the bar member, the bar support portion, and the sheath member in the recess, these do not protrude from the recess, are not easily caught in the closed state and the opening / closing operation, and have a good appearance.

In the third invention, in the first or second invention,
The above-mentioned bar member
A first straight line portion that is slidably supported by the bar support portion and whose tip end side is locked to the locked member.
A hooking part that is continuously bent vertically to the first straight line part and hooks a finger,
It is bent from the hook portion and extends in parallel in the same direction as the first straight portion, is shorter than the first straight portion, and has a second straight portion accommodated in the sheath member.

According to the above configuration, by keeping the length of the hooking portion appropriate, the operability can be easily improved, and the second straight portion is separated from the sheath member in consideration of the maximum stroke of the first straight portion. Easy to set so that it does not come out.

In the fourth invention, in the third invention,
The sheath member is formed with a notch portion in which the corner portion between the hook portion and the second straight line portion can be moved.

According to the above configuration, the stroke of the first straight line portion can be easily adjusted by adjusting the stroke of the notched portion of the sheath member.

In the fifth invention, in any one of the first to fourth inventions,
The bar support portion is provided with an urging member that urges the bar member toward the locked member side.

According to the above configuration, when the barb member is slid to the avoidance position, the tailgate is rotated to the closed position, and then the hand is released, the barb member is urged by the urging member and the bar member automatically becomes the locked member. Locked and locked. Further, since the rear end side of the bar member is automatically accommodated in the sheath member, even if the size of the bar member is increased, it does not wobble or get in the way.

In the sixth invention, in the fifth invention,
The bar member is formed in a state in which the rod-shaped member is bent.
The urging member is a compression coil spring, and is housed in the bar support portion in a state of being fitted to the outer periphery of the first straight line portion of the bar member.

According to the above configuration, the bar member can be reliably urged with a simple and compact configuration.

In the seventh invention, in any one of the first to sixth inventions,
The opening / closing gate is a tailgate configured so that it can be opened upward by rotating from above to below with the lower hinge as a fulcrum.
It is configured so that dump work can be performed backward with the tailgate opened upward.

According to the above configuration, when the tailgate is opened and the dump work is performed, the bar member, the bar support portion, and the sheath member are provided on the outer surface of the tailgate, so that the load slides down on the bottom plate side of the tailgate. Does not get caught.

In the eighth invention, in any one of the first to sixth inventions,
The opening / closing gate is a pair of double door opening / closing gates that open in a double door around a hinge axis extending vertically.
The locked member is provided on a vertical plate below the opening / closing gate.

According to the above configuration, when the double door opening / closing gate is opened and brought into contact with the outer surface of another vertical plate, the bar member, the bar support portion and the sheath member are positioned on the inner surface and do not get in the way.

As described above, according to the present invention, it is possible to easily and surely lock and unlock the opening / closing gate without increasing the size as much as possible.

It is a back view which shows the left half of the tailgate which concerns on Embodiment 1 of this invention, and the periphery thereof enlarged. It is a side view which shows the tailgate which concerns on Embodiment 1 of this invention and the periphery thereof in an enlarged manner. It is an enlarged plan view of the IC part of FIG. It is the bottom view which shows the sheath member enlarged. It is a side view which shows the dump truck which concerns on Embodiment 1 of this invention. It is a top view which shows the dump truck which concerns on Embodiment 1 of this invention. It is a rear view which shows the dump truck which concerns on Embodiment 1 of this invention. It is a side view which shows the dump truck which concerns on Embodiment 2 of this invention. It is a top view which shows the dump truck which concerns on Embodiment 2 of this invention. It is a rear view which shows the dump truck which concerns on Embodiment 2 of this invention. FIG. 7 is an enlarged rear view of part VIII of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
2 to 4 show a dump truck 1 according to the first embodiment of the present invention. The dump truck 1 is provided with a driver's cab 3 on the front side of a runnable vehicle 2, and is a sub that extends back and forth on a chassis 2a. The frame 4 is fixed. A loading platform 5 is mounted on the subframe 4 so as to be undulating by, for example, an undulating cylinder (not shown). That is, the loading platform 5 is undulated around the dump shaft 5a at the rear end so that the dump work can be performed.

The loading platform 5 includes a pair of left and right side plates 6 as vertical plates, a tailgate 7 as an opening / closing gate, and a bottom plate 8 as a part of the vertical plates behind the loading platform 5. In this dump truck 1, the rear side of the bottom plate 8 is inclined upward toward the rear. As a result, it is possible to raise the discharge position so that the load can be easily transferred to the garbage truck and discharged to a position away from the dump truck 1, and even if sewage comes out from the load, it does not leak from behind. ing. The rear bottom sides of the pair of left and right side plates 6 are inclined upward toward the rear according to the shape of the bottom plate 8. Therefore, the height of the tailgate 7 is relatively low in the vertical direction.

As shown in an enlarged manner in FIGS. 1A to 1C, the tailgate 7 is configured to be openable upward about the lower hinge 7a at the lower rear end of the loading platform 5. For example, as shown by the alternate long and short dash line in FIG. 1B, the opening degree is set by a stopper or the like (not shown) so as to be substantially parallel to the bottom plate 8 in the most open top open state. In the figure, (C) indicates the closing position of the tailgate 7, and (O) indicates the opening position.

The tailgate 7 is reinforced by a square cylindrical stiffener 7c provided on the outer peripheral edge thereof, and the bottom plate 8 side (front surface side) is made of a flat steel plate or the like. A concave portion 9 divided into a substantially rectangular shape in the rear view is recessed on the side opposite to the bottom plate 8 (rear surface side) of the tailgate by the flat steel plate and the stiffener 7c. A lock mechanism 10 for locking the tailgate 7 to a closed position is provided in the recess 9. The lock mechanism 10 is provided at each of the left and right ends of the tailgate 7.

The lock mechanism 10 includes a bar member 11 housed in the recess 9. The bar member 11 is slidably supported by a bar support portion 12 provided in the recess 9. On the rear surface of the side plate 6 adjacent to the tailgate 7, a locked member 14 that holds the tailgate 7 in the closed position (C) with the tip end side of the bar member 11 locked is provided. A sheath member 15 for accommodating the base end side of the bar member 11 is provided at a position of the recess 9 away from the bar support portion 12.

Specifically, the bar member 11 is formed by bending a round steel, for example, and is supported by the bar support portion 12 so as to be slidable in the horizontal direction, and the tip end side is locked to the locked member 14. It is bent continuously and vertically to the portion 11a and the first straight line portion 11a, and is bent from the hooking portion 11b for hooking a finger and the hooking portion 11b and extends in parallel with the first straight line portion 11a. It is shorter than the first straight portion 11a and includes a second straight portion 11c housed in the sheath member 15.

The bar support portion 12 is made of, for example, a member formed by bending a steel plate into a U shape so that the first straight line portion 11a is inserted into a through hole (not shown) formed in a pair of left and right side walls 12a facing each other. It is configured. The bar support portion 12 is welded to, for example, the lower surface of the upper stiffener 7c forming the recess 9. In the present embodiment, the bar support portion 12 is inserted in a part of the left and right outer stiffeners 7c, but even in the positional relationship where the left and right outer side walls 12a of the bar support portion 12 abut on the left and right inner side surfaces of the left and right outer stiffener 7c. good.

The bar support portion 12 is provided with a compression coil spring 13 as a urging member that urges the bar member 11 toward the locked member 14. A fixed washer 11d is fixed to the first straight line portion 11a of the bar member 11, and the compression coil spring 13 is fitted to the outer periphery of the first straight line portion 11a of the bar member 11 and is fitted to the left and right inner bar support portions. It is housed between the side wall 12a of the twelve and the fixed washer 11d. As a result, when the bar support portion 12 is slid inward to the left and right, the compression coil spring 13 is compressed, and the reaction force causes the bar member 11 to move to the left and right outer closed positions (C) in the direction indicated by the white arrow in FIG. 1A. It is configured to be urged. In this way, the bar member 11 can be reliably urged in the direction of the locked member 14 with a simple and compact configuration.

As shown in FIG. 1D, the sheath member 15 is formed by bending, for example, a steel plate, and has a notch portion 15a in which the corner portion between the hook portion 11b and the second straight line portion 11c can be moved. In the sheath member 15, for example, a steel plate is bent into an L-shaped cross section, and a notch portion 15a is formed at the left and right inner end portions. The cutout portion 15a has a closed position end portion 15b that is pushed by the compression coil spring 13 and is brought into contact with the hook portion 11b to hold the bar member 11 at the closed position (C), and the hook portion 11b is placed at an avoidance position on the left and right inside (FIG. After sliding it to (indicated by E in 1D), it is slightly rotated to the bottom side of the recess 9, and the hooking portion 11b is slid to the left and right outside by the urging force of the compression coil spring 13 to hook and open the bar member 11. An opening position end portion 15c that can be held at the position (O) is formed. When the hook portion 11b is slid to the avoidance position (E) on the left and right inside, the maximum slide amount of the bar member 11 may be defined by the compressed compression coil spring 13. When the maximum slide amount is reached, the positional relationship may be set so that the second straight line portion 11c does not come off from the sheath member 15. As described above, in the present embodiment, the stroke of the first straight line portion 11a can be easily adjusted by adjusting the stroke of the notch portion 15a of the sheath member 15.

As shown in FIGS. 1A to 1C, the locked member 14 is formed of, for example, a steel plate bent into an L shape to form a locking hole 14a into which the tip end side of the first straight line portion 11a is inserted. It is fixed at an appropriate position on the rear surface of the left and right side plates 6 by welding or the like.

With this configuration, at the closed position (C) of the bar member 11 shown by the solid line in FIG. 1A, the tip end side of the first straight line portion 11a is urged by the compression coil spring 13 to be the locking hole of the locked member 14. By being locked to 14a, the lock mechanism 10 is not unintentionally unlocked due to vibration or the like during traveling.

Then, when the tailgate 7 is opened, it is moved inward to the left and right by hooking a plurality of fingers on the hook portion 11b which is relatively long up and down. At this time, by keeping the length of the hook portion 11b to the maximum in the limited area of the recess 9, the bar member 11 can be easily slid and moved even if the tailgate 7 is under pressure such as dust as a load. Can be made to.

Then, the hook portion 11b is slid to the avoidance position (E) away from the notch portion 15a, then slightly rotated toward the bottom surface of the recess 9, and then released from the hand to open position end portion shown in FIG. 1D. Hold at 15c. The same operation is performed for the lock mechanism 10 on the left and right opposite sides. As a result, the tailgate 7 opens.

Next, as shown by the alternate long and short dash line in FIG. 2, the loading platform 5 is tilted to perform dump work. In the present embodiment, when the tailgate 7 is opened for dumping work, the bar member 11, the bar support portion 12, and the sheath member 15 are provided in the recess 9 of the outer surface 7b of the tailgate 7, so that the tailgate 7 is provided. The load that slides down the flat surface on the bottom plate 8 side of the bottom plate 8 is not caught.

When the dump work is completed and the loading platform 5 returns to the position shown by the solid line in FIG. 2, the tailgate 7 is rotated to the original closed position (C), and the hook portion 11b is slid to the avoidance position (E) on the left and right inside. After moving it, it is slightly rotated in a direction away from the bottom surface of the recess 9, and when the hand is released, it is urged by the compression coil spring 13 and the tip end side of the first straight line portion 11a is engaged with the locking hole 14a of the locked member 14. Stopped and locked. In this way, when the bar member 11 is slid to the avoidance position (E), the tailgate 7 is rotated to the closed position (C), and then the hand is released, the bar member 11 is automatically attached to the locked member 14. Locked and locked. Further, since the rear end side of the bar member 11 is automatically accommodated in the sheath member 15, even if the size of the bar member 11 is increased, it does not wobble or get in the way.

As described above, in the present embodiment, the bar member 11, the bar support portion 12, and the sheath member 15 are housed in the recess 9 provided on the outer peripheral surface of the tailgate 7 on the opposite side to the bottom plate 8, so that the tailgate 7 is accommodated. When the dump truck is opened, the load is not caught on these and does not protrude from the tailgate 7, so that the load does not come into contact with the container, the hopper car, or the like when the load is loaded.

Further, since the bar member 11 is housed in the sheath member 15, even if the size of the bar member 11 is increased, the bar member 11 does not wobble, and if the size of the bar member 11 can be increased within the range within the recess 9, the load can be increased. It is easy to open the tailgate 7 even if it receives pressure from.

In the present embodiment, the length of the hook portion 11b can be kept appropriate in the recess 9 in the limited range of the tailgate 7 having a relatively low vertical height, and the operability can be easily improved. ..

Therefore, according to the dump truck 1 according to the present embodiment, the tailgate 7 can be easily and surely locked and unlocked without increasing the size of the lock mechanism 10 as much as possible.

(Embodiment 2)
5 to 8 show the loading platform 105 of the dump truck according to the second embodiment of the present invention, which is different from the first embodiment in that the tailgate 107 is opened differently. In the present embodiment, the same parts as those in FIGS. 1A to 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

The loading platform 105 of this embodiment is also mounted on a subframe of a truck similar to or larger than the vehicle 2 of the first embodiment. On the rear side of the loading platform 105, a pair of tailgates 107 having a net-like outer surface 107b on the upper half is provided in a double-door shape, and a pair of double-door-shaped tailgates whose lower half is made of steel plate. It is composed of the vertical plate 111 of.

The tailgate 107 of the present embodiment is configured to be able to open double doors around a hinge shaft 107a extending vertically provided at the rear ends of the left and right side plates 106. The pair of tailgates 107 are locked by the lock mechanism 110 having the same configuration as the lock mechanism 10 of the first embodiment, and can be locked by a plurality of lock members 112.

The pair of vertical plates 111 are configured to be double-door-openable around a hinge shaft 111a extending vertically provided at the rear ends of the left and right side plates 106. The pair of vertical plates 111 can also be locked by a plurality of lock members 112.

The lock mechanism 110 of the present embodiment basically has the same configuration as the lock mechanism 10 of the first embodiment, but its slide direction is not a horizontal direction but a vertical direction. Further, the locked member 114 is formed in each of the stiffeners 111b of the pair of lower left and right vertical plates 111, and the tip end side of the first straight line portion 11a is inserted into the locking hole 114a.

Since the outer surface 107b of the tailgate 107 of the present embodiment has a net structure, the sheath member 15 is fixed to the net structure portion by welding or the like. Further, since the net structure portion is thinner than the stiffener 107c arranged in the rear view rectangular frame shape, the rear view rectangular concave portion 109 having the net structure portion as the bottom surface is also formed. The bar member 11, the bar support portion 12, and the sheath member 15 are housed in the recess 109 as in the first embodiment.

In the present embodiment, when the double door tailgate 107 is opened and held in contact with the outer surfaces of the left and right side plates 106, the bar member 11, the bar support portion 12, and the sheath member 15 are housed in the recess 109. It has been done and does not get in the way. Therefore, the width of the vehicle does not increase, and it does not get in the way when loading or unloading the loading platform 105.

Therefore, even in the tailgate 107 according to the present embodiment, the tailgate 107 can be easily and surely locked and unlocked without increasing the size of the lock mechanism 110 as much as possible.

(Other embodiments)
The present invention may have the following configurations with respect to the above embodiment.

That is, in the first embodiment, the dump truck 1 is based on a light vehicle, but is not limited to this, and can be applied to a dump truck based on an ordinary vehicle.

Further, in the above embodiment, the lock mechanism of the tailgate 7 is described, but it can also be applied to the lock mechanism of the side gate.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and uses.

1 Dump truck
2 Vehicle
2a chassis
3 Driver's cab
4 subframe
5 Loading platform
5a Dump shaft
6 Side plate (vertical plate)
7 Tail gate (vertical plate, open / close gate)
7a Lower hinge
7b outer side
7c Stifuna
8 bottom plate
9 Recess
10 Lock mechanism
11 Latch member
11a First straight line (tip side)
11b hook part
11c 2nd straight part (base end side)
11d fixed washer
12 Latch support
12a side wall
13 Compression coil spring
14 Locked member
14a locking hole
15 Sheath member
15a Notch
15b position end
15c position end
105 loading platform
106 side plate
107 Tailgate
107a hinge shaft
107b outer surface
107c Stifuna
108 bottom plate
109 Recess
110 lock mechanism
111 vertical board
111a hinge shaft
111b Stifuna
112 Lock member
114 Locked member
114a locking hole

Claims (8)

In a dump truck having a bottom plate and a plurality of vertical plates erected on the bottom plate, and having a loading platform having an opening / closing gate in which a part of the plurality of vertical plates rotates to open and close.
A bar member housed on the outer surface of the opening / closing gate opposite to the bottom plate,
A bar support portion provided on the outer surface and supporting the bar member so as to be slidable, and a bar support portion.
A locked member provided on the vertical plate adjacent to the opening / closing gate and holding the opening / closing gate in the closed position with the tip end side of the bar member locked.
It is provided with a sheath member provided at a position separated from the bar support portion on the outer surface in the vertical direction and accommodating the base end side of the bar member.
A dump truck characterized in that the bar support portion, the locked member, and the sheath member are arranged in a region closer to the end portion of the opening / closing gate. In the dump truck according to claim 1,
A recess is formed on the outer surface.
A dump truck characterized in that the bar member, the bar support portion, and the sheath member are provided inside the recess. In a dump truck having a bottom plate and a plurality of vertical plates erected on the bottom plate, and having a loading platform having an opening / closing gate in which a part of the plurality of vertical plates rotates to open and close.
A bar member housed on the outer surface of the opening / closing gate opposite to the bottom plate,
A bar support portion provided on the outer surface and supporting the bar member so as to be slidable, and a bar support portion.
A locked member provided on the vertical plate adjacent to the opening / closing gate and holding the opening / closing gate in the closed position with the tip end side of the bar member locked.
It is provided at a position away from the bar support portion on the outer surface, and is provided with a sheath member that accommodates the base end side of the bar member.
The above-mentioned bar member
A first straight line portion that is slidably supported by the bar support portion and whose tip end side is locked to the locked member,
A hooking part that is continuously bent vertically to the first straight line part and hooks a finger,
It is characterized in that it is bent from the hook portion and extends in parallel in the same direction as the first straight portion, is shorter than the first straight portion, and has a second straight portion accommodated in the sheath member. Dump truck. In the dump truck according to claim 3,
A dump truck characterized in that the sheath member is formed with a notch portion in which a corner portion between the hook portion and the second straight line portion can be moved. In the dump truck according to any one of claims 1 to 4.
The dump truck is characterized in that the bar support portion is provided with an urging member that urges the bar member toward the locked member side. In the dump truck according to claim 3,
The bar support portion is provided with an urging member that urges the bar member toward the locked member side.
The bar member is formed in a state in which the rod-shaped member is bent.
The urging member is a compression coil spring, and is a dump truck characterized in that it is housed in the bar support portion in a state of being fitted to the outer periphery of the first straight line portion of the bar member. In the dump truck according to any one of claims 1 to 6.
The opening / closing gate is a tailgate configured so that it can be opened upward by rotating from above to below with the lower hinge as a fulcrum.
A dump truck characterized in that it is configured so that dump work can be performed backward with the tailgate opened upward. In the dump truck according to any one of claims 1 to 6.
The opening / closing gate is a pair of double door opening / closing gates that open in a double door around a hinge axis extending vertically.
The locked member is a dump truck characterized in that it is provided on a vertical plate below the opening / closing gate.

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