JP6978344B2 - Dump truck - Google Patents

Description

The present invention relates to a dump truck provided with a pair of double doors that open.

Conventionally, for example, as in Patent Document 1, a pair of open / close plates are provided with a bottom plate and a plurality of vertical plates erected on the bottom plate, and a part of the plurality of vertical plates rotates to open a double door. Dump trucks with a loading platform, which is a gate, are known. In this dump truck, the dump work can be performed with the pair of open / close gates open to the public, and the load in the loading platform can be discharged.

Japanese Unexamined Patent Publication No. 2013-151244

In such a dump truck, if there is a crossbar when dumping with the double doors open, the dump efficiency will decrease depending on the type of load. Further, if the crossbar is arranged as it is at the time of dumping work, if the load is a large rock or the like, the crossbar may be damaged by the rock or the like at the time of discharging.

On the other hand, if the crossbar is not provided, the gap between the pair of adjacent vertical plates may be widened due to deterioration over time, overloading, etc., which may make it difficult to close the opening / closing gate or deteriorate the appearance.

The present invention has been made in view of this point, and an object of the present invention is to maintain the strength of the loading platform that does not change over time due to damage during discharge while preventing deterioration of discharge performance. It is in.

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

Specifically, in the first invention, a pair of opening / closing gates including a bottom plate and a plurality of vertical plates erected on the bottom plate, and a part of the plurality of vertical plates is rotated to open a double door. It is assumed that a dump truck is equipped with a loading platform.

And the above dump truck
The pair of open / close gates are rotatably provided around a rotation axis provided on a pair of adjacent vertical plates adjacent to the pair of open / close gates.
Above the pair of open / close gates, a removable crossbar is provided so as to connect the pair of adjacent vertical plates.

According to the above configuration, a removable crossbar is provided above the pair of open / close gates so as to connect a pair of adjacent vertical plates, so the crossbar can be removed during dumping work, which hinders dumping work. Will not come. Since the pair of adjacent vertical plates are connected by a crossbar at times other than the dump work, the space between the pair of adjacent vertical plates does not open due to aged deterioration or the like.

In the second invention, in the first invention,
Each of the pair of adjacent vertical plates is provided with a protrusion protruding upward.
Fitting portions that fit into the protrusions are provided at both ends of the crossbar.

According to the above configuration, the crossbar may be moved up and down to fit the fitting portion and the protrusion, so that the crossbar can be easily attached and detached.

In the third invention, in the second invention,
The fitting portion of the crossbar has a cylindrical shape with at least a lower opening, and is configured so that the protrusion is inserted and fitted from the lower side of the fitting portion.

According to the above configuration, a crossbar having a simple configuration and easy attachment / detachment work can be obtained.

In the fourth invention, in the second or third invention,
The pair of adjacent vertical plates are provided with a lock member that locks the crossbar in a state where the fitting portion is fitted to the protrusion portion.
Locked portions for locking the locking portions of the locking member are provided at both ends of the crossbar.

According to the above configuration, the crossbar is securely locked by locking the locked portions at both ends of the crossbar with the lock member.

In the fifth invention, in the fourth invention,
The protrusion is provided at a position farther from the opening / closing gate than the corner portion between the pair of adjacent vertical plates and the opening / closing gate.
The crossbar is U-shaped in plan view.

According to the above configuration, even if the lock member is provided on the pair of adjacent vertical plates, it is possible to prevent the lock member from coming into contact with the lock member when the opening / closing gate is opened. The U-shaped opening includes a shape in which the U-shaped opening portion is widened or narrowed.

In the sixth invention, in any one of the first to fifth inventions,
A locking shaft member extending up and down is provided in the vicinity of the mating surfaces of the pair of open / close gates.
The crossbar is provided with an engaged portion with which the upper end side of the locking shaft member is engaged.

According to the above configuration, when a pair of adjacent vertical plates are connected by a crossbar, the pair of open / close gates can be fixed to the crossbar in a closed state, so that the rigidity is increased as a whole.

As described above, according to the present invention, it is an object of the present invention to maintain the strength of the loading platform that does not change over time due to damage during discharge while preventing deterioration of discharge performance.

FIG. 3 is an enlarged plan view showing a crossbar, a lock member, and the periphery thereof according to an embodiment of the present invention. It is a back view which shows the crossbar, the lock member and the periphery thereof which concerns on embodiment of this invention in an enlarged manner. It is a side view which shows the crossbar, the lock member and the periphery thereof which concerns on embodiment of this invention in an enlarged manner. FIG. 3 is an enlarged plan view showing a part of a crossbar according to an embodiment of the present invention. It is a side view which shows the dump truck which concerns on embodiment of this invention. It is a back view which shows the pair of open / close gates, a crossbar and the periphery thereof which concerns on embodiment of this invention in an enlarged manner. It is a top view which shows the pair of open / close gates, a crossbar and the periphery thereof which concerns on embodiment of this invention.

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

2 to 4 show a dump truck 1 according to an embodiment of the present invention. The dump truck 1 is provided with a driver's cab 3 on the front side of a movable vehicle 2, and is a subframe extending back and forth on a chassis 2a. 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 constitutes a bottom plate 9 mounted on the subframe 4, a pair of left and right side plates 6 as vertical plates constituting the four sides of the bottom plate 9, a front plate 7, and a rear side of the side plates 6. It includes a rear fixed pillar 8 and a tailgate 10 that can be opened and closed behind the pillar 8.

The tailgate 10 has a pair of rectangular opening / closing gates 11 that rotate and open double doors. The pair of open / close gates 11 are rotatably provided around a vertically extending rotation shaft 13 provided on a pair of adjacent rear fixed columns 8.

As shown in FIGS. 1A and 4, the rotation shaft 13 is arranged offset to the rear side in a plan view from the corner portion formed by the rear side fixed pillar 8 and the opening / closing gate 11. Specifically, the rotating shaft 13 has a first hinge member 13a having a round pipe at the rear end of a flat plate extending back and forth fixed to the rear fixing pillar 8, and one end side fixed to the opening / closing gate 11 and the other end. It is rotatably supported by a plate member whose side extends outward to the left and right and a second hinge member 13b having a round pipe coaxially provided with the first hinge member 13a at its left and right outer ends.

A removable crossbar 12 is provided above the pair of opening / closing gates 11 so as to connect the pair of rear fixing columns 8. It is desirable that the crossbar 12 is not too heavy so that the rear fixed pillar 8 has rigidity so as not to spread to the left and right outside, but can be removed and attached manually. For example, the crossbar 12 is composed of a welded structure of a square pipe, extends linearly to the left and right, and covers almost the entire upper side of the pair of opening / closing gates 11 and the crossbar main body 12a. It has an orthogonal portion 12b connected so as to be orthogonal to both left and right ends, and has a U-shape in a plan view. At the front end of the orthogonal portion 12b, a cylindrical fitting portion 12c having an opening at the bottom is provided. The crossbar 12 may be connected so that the corner portion is slanted without being orthogonal to the crossbar main body 12a as in the orthogonal portion 12b.

On the other hand, each of the pair of rear fixed columns 8 is provided with a protrusion 8a projecting upward. For example, the protrusion 8a is made of channel steel welded to the upper surface of the rear fixed pillar 8, and the shape of the protrusion 8a is not particularly limited as long as it has an outer shape that fits into the fitting portion 12c. .. Then, when the crossbar 12 is fitted from above, the protrusion 8a is inserted from the lower side of the fitting portion 12c of the fitting portions 12c at both ends to be fitted.

It is desirable that the protrusion 8a into which the fitting portion 12c is fitted is not at the corner of the rear fixed pillar 8 and the pair of opening / closing gates 11, but at the front side thereof. This makes it possible to prevent interference between the first hinge member 13a or the like that supports the rotation shaft 13 and the lock member 20 directly under the fitting portion 12c. Further, there is an advantage that the crossbar main body 12a and the opening / closing gate 11 can be laid out at the same position in a plan view.

Further, hook-shaped locked portions 12d are provided on the left and right outer side surfaces of the fitting portion 12c of the crossbar 12. On the other hand, for example, a manual lock member 20 is provided directly below the protrusion 8a on the left and right outer side surfaces of the rear fixed pillar 8. As shown in FIGS. 1B and 1C, the lock member 20 has a handle 21, a main body 22 having a built-in spring, and an annular locking portion 23, and by lowering the handle 21, the lock member 20 is engaged. The stop portion 23 is locked by being locked to the locked portion 12d of the crossbar 12 in a state where the fitting portion 12c is fitted to the protrusion 8a.

Further, as shown in FIG. 3, a pair of locking shaft members 14 extending vertically are provided in the vicinity of the mating surfaces of the pair of opening / closing gates 11. The locking shaft member 14 is rotatably supported by, for example, three support members 14a provided on the opening / closing gate 11 at intervals in the vertical direction. On the lower side of the locking shaft member 14, a locking handle 15 that can rotate up and down and around the axis extending the locking shaft member 14 up and down is provided. By engaging the locking handle 15 with the fixing bracket 16 provided on the opening / closing gate 11, the locking shaft member 14 can be fixed in a state where the pair of opening / closing gates 11 are closed. Further, the crossbar 12 is provided with an engaged portion 17 with which the upper end side of the locking shaft member 14 is engaged so that the locking shaft member 14 can be fixed. Similarly, an engaged portion 17 is also provided below the pair of opening / closing gates 11 at the lower part of the loading platform 5. In the present embodiment, since the crossbar main body 12a and the opening / closing gate 11 are laid out at the same position in a plan view, there is an advantage that the engaged portion 17 can be installed on the crossbar 12.

A stopper 18 having a tip made of rubber or the like is provided on the upper side of the opening / closing gate 11 to soften the impact when the side plate 6 is in contact with the opening / closing gate 11.

Next, the opening / closing operation of the tailgate 10 will be described.

First, the locking handle 15 is rotated upward to release the engagement with the fixing bracket 16, and then the locking handle 15 is pulled toward you to engage the locking shaft member 14 with the upper and lower engaged portions 17. Release the match.

Next, the pair of open / close gates 11 are opened in a double door. At this time, when the opening / closing gate 11 is rotated by about 270 degrees as shown by the alternate long and short dash line in FIG. 1A, the stopper 18 provided on the opening / closing gate 11 comes into contact with the side plate 6. As shown in FIG. 1A, the rotating shaft 13 is offset rearward, so that the opening / closing gate 11 can smoothly open / close without coming into contact with the lock member 20.

In this state, the load can be loaded, but the crossbar 12 can be removed to improve the workability at the time of dumping, especially at the time of dumping work. If the crossbar 12 does not affect the loading or dumping work, the work is performed with the crossbar 12 attached.

Therefore, in order to remove the crossbar 12, the handle 21 of the lock member 20 is rotated upward to release the locking between the locking portion 23 and the locked portion 12d, and then the handle 21 is returned to the original position.

After releasing the locking between the left and right locking portions 23 and the locked portions 12d, the crossbar 12 is lifted upward and removed. By limiting the weight of the crossbar 12, it can be removed manually.

If the dump work is performed with the crossbar 12 removed as shown by the alternate long and short dash line in FIG. 2, the load does not get caught in the crossbar 12 and the dump work can be performed without any trouble.

After the dump work is completed and the loading platform 5 is returned to the state shown by the solid line in FIG. 2, the crossbar 12 is fitted again.

First, the removed crossbar 12 is lifted and fitted into the fitting portions 12c at both ends by inserting the locked portions 12d provided on the upper surface of the rear fixed pillar 8 into the fitting portions 12c. Next, by locking the locked portions 12d at both ends of the crossbar 12 with the lock member 20, the crossbar 12 is securely locked.

Next, in the reverse procedure of the above, the pair of open / close gates 11 are closed, and the locking shaft member 14 is rotated and locked.

In this way, the crossbar 12 may be moved up and down to fit or remove the fitting portion 12c and the protrusion 8a, so that the crossbar 12 can be easily attached and detached.

Further, since a removable crossbar 12 is provided above the pair of opening / closing gates 11 so as to connect the pair of rear fixed columns 8, the crossbar 12 can be removed during the dumping operation, and the dumping operation can be performed without any trouble. It can be performed. On the other hand, at times other than dump work, since the pair of rear fixed columns 8 are connected by the crossbar 12, the space between the pair of rear fixed columns 8 does not open, and the rigidity of the tailgate 10 as a whole increases.

Therefore, according to the dump truck 1 according to the present embodiment, the pair of rear fixed columns 8 adjacent to the pair of double doors that open in a double door are connected by a detachable crossbar 12 to prevent deterioration of the discharge performance. , It is possible to maintain the strength of the loading platform that does not change over time due to damage during discharge.

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

That is, in the above embodiment, the case where the pair of opening / closing gates 11 constitute the tailgate 10 is described, but it can also be applied to the case where the pair of opening / closing gates 11 are provided on the side gates on the side of the vehicle. ..

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
7 Front plate
8 Rear fixed pillar
8a protrusion
9 Bottom plate
10 Tailgate
11 Open / close gate
12 Crossbar
12a Crossbar body
12b Orthogonal part
12c Fitting part
12d Locked part
13 Rotating shaft
13a First hinge member
13b 2nd hinge member
14 Lock shaft member
14a Support member
15 Lock handle
16 Fixing bracket
17 Engaged part
20 Lock member
21 handle
22 Main body
23 Locking part

Claims (6)

It is provided with a bottom plate and a plurality of vertical plates erected on the bottom plate, and is provided with a loading platform which is a pair of opening / closing gates in which a part of the plurality of vertical plates rotates to open a double door. In a dump truck where the load can be discharged with the opening and closing gate open.
Of the plurality of vertical plates, rear fixing columns fixed to the bottom plate are provided on the rear side of the pair of adjacent vertical plates adjacent to each of the pair of opening / closing gates.
The pair of open / close gates are rotatably provided around a rotation shaft provided on the rear fixed pillar.
A dump truck characterized in that a removable crossbar is provided above the pair of opening / closing gates so as to connect the pair of adjacent vertical plates. In the dump truck according to claim 1,
Each of the pair of adjacent vertical plates is provided with a protrusion protruding upward.
A dump truck characterized in that fitting portions fitted to the protrusions are provided at both ends of the crossbar. In the dump truck according to claim 2,
The fitting portion of the crossbar has a tubular shape with at least a lower opening, and is characterized in that the protrusion is inserted and fitted from the lower side of the fitting portion. Dump truck. In the dump truck according to claim 2 or 3.
The pair of adjacent vertical plates are provided with a lock member that locks the crossbar in a state where the fitting portion is fitted to the protrusion portion.
A dump truck characterized in that locked portions for locking the locking portions of the locking member are provided at both ends of the crossbar. In a dump truck provided with a bottom plate and a plurality of vertical plates erected on the bottom plate, and equipped with a loading platform which is a pair of opening / closing gates in which a part of the plurality of vertical plates rotates to open a double door.
The pair of open / close gates are rotatably provided around a rotation axis provided on a pair of adjacent vertical plates adjacent to the pair of open / close gates.
Above the pair of open / close gates, a removable crossbar is provided so as to connect the pair of adjacent vertical plates.
Each of the pair of adjacent vertical plates is provided with a protrusion protruding upward.
Fitting portions that fit into the protrusions are provided at both ends of the crossbar.
The pair of adjacent vertical plates are provided with a lock member that locks the crossbar in a state where the fitting portion is fitted to the protrusion portion.
Locked portions for locking the locking portions of the locking member are provided at both ends of the crossbar.
The protrusion is provided at a position farther from the opening / closing gate than the corner portion between the pair of adjacent vertical plates and the opening / closing gate.
A dump truck characterized in that the crossbar is U-shaped in a plan view. In the dump truck according to any one of claims 1 to 5.
A locking shaft member extending up and down is provided in the vicinity of the mating surfaces of the pair of open / close gates.
The dump truck is characterized in that the crossbar is provided with an engaged portion with which the upper end side of the locking shaft member is engaged.

Images