JPS6241887B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has a block body that is provided between the chassis frame and the cargo box so that it can swing back and forth, so that even if the operating part is operated to the position where the cargo box is lowered due to an erroneous operation, This invention relates to a cargo box falling prevention device for a dump truck that reliably prevents cargo boxes from falling.

Generally, as shown in FIG.
By protruding the block body 03 which is pivotably supported on the chassis frame 01, the loading box 04 is prevented from falling, and the block body 03 is laid down on the chassis frame 01, so that the upper surface of the chassis frame 01 and the lower surface of the loading box 04 are extended. In the case where the gap between the blocks, that is, the block 05 is partially cut out and the block body 03 is stored in this part, the height H of the block body 03 is equal to the height h of the block body 05.
This poses a problem in that even if the block body is enlarged to form a strong block body capable of supporting a heavy cargo box, it is difficult to do so.

The present invention provides a cargo box drop prevention device for a dump truck that solves the above problem.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a chassis frame, a subframe 2 is mounted on the chassis frame 1, and a supporter 3 is mounted on the subframe 2, respectively. Reference numeral 4 denotes a cargo box which can be tilted around a hinge part 5 provided at the rear of the sub-frame 2, and when the cargo box 4 is lowered, the lower surface of the cargo box 4 joins to the upper surface of the support 3.

Between the sub-frame 2 and the cargo box 4, a cargo box lifting device 6 is interposed at the front, and a cargo box lowering prevention device 7, which will be described later, is installed at the rear near the hinge portion 5. The box fall prevention device 7 is attached to the rear portion of the subframe 2 by cutting out a portion of the support 3 corresponding to the rear portion.

Next, the cargo box drop prevention device 7 will be explained.
Slightly forward of the hinge portion 5, there are mounting brackets 8, 8 whose bases are joined and welded to the side surfaces of the left and right subframes 2, 2, and whose tips protrude from the upper surfaces of the subframes 2, 2 (only one is shown in the drawing). ) is provided.

At the top of the mounting brackets 8, 8 are bearings 9,
9 is fixed, and a shaft 10 that slides in the left-right direction and rotates in the front-rear direction is installed on these bearings 9,9.

Reference numeral 11 denotes a block body that holds the cargo box 4 in an inclined shape.This block body 11 has the shaft 10 penetrated in the front of its base so that it becomes integral with the shaft 10, moves in the left-right direction together with the shaft 10, and moves in the front-rear direction. Rotate to.

The block body 11 has a width L slightly smaller than the width l of the subframe 2, and a height H equal to the height h of the tree support 3.
It is formed of a hollow body with a rectangular cross section that is enlarged appropriately.

Furthermore, the upper surface of the block body 11 forms a contact surface 12 where the block body 11 and the lower surface of the inclined packing box 4 form a right angle, and the lower surface of the block body 11 is indicated by the solid line in FIG. When the block body 11 extends rearward and extends upwardly, it forms an inclined joint surface 13 that joins to the top surface of the subframe 2, and when the block body 11 catches the load box from falling, the top surface of the shaft 10 and the subframe 2 is formed. It will be supported by the joint surface 13 that is joined to.

Reference numeral 14 denotes a support piece that supports the front end of the block body 11 when the block body 11 is stored horizontally inside the subframe 2;
is fixed to the inner surface of the subframe 2. 1
5 is a stopper fixed to the upper surface of the subframe 2, and the front end of the lower surface of the protruding block body 11 is brought into contact with the stopper,
To reduce the load acting on the shaft 10. 16
is the shaft 1 that protrudes outward from the subframe 2.
It is an operating lever fixed to the end of the 0.

With the above configuration, the present invention is in a running state where the cargo box 4 is connected to the upper surface of the supporter 3, as shown by the two-dot chain line in FIG. 2 and the solid line in FIG. The block body 11 is housed horizontally, with appropriate gaps provided on the inner surface of the block body 11.

Next, the cargo box 4 is lifted to an appropriate height by the lifting device 6, and in this state, the block body 11 is rotated backward about the shaft 10 using the operating lever 16, so that the joint surface 13 on the lower surface of the block body 11 is When the block body 11 is moved in the left-right direction as shown in FIG. 3 at a position parallel to the top surface of the frame 2,
The joint surface 13 on the lower surface of the block body 11 is joined to the subframe 2, and the block body 1 is placed at the solid line position in FIG.
1 can be extended.

Thereafter, maintenance and inspection of the hydraulic equipment between the cargo box 4 and the chassis frame 2 is performed in the above-mentioned state, and even if the cargo box 4 were to descend at this time, the block body 11 would be able to catch the cargo box 4. This allows you to work with peace of mind.

In the above embodiment, one block body was explained, but although not shown, the block bodies are respectively attached to a pair of subframes, and the left and right pair of block bodies are connected by a shaft 10, and the other block body is attached to a pair of subframes. When stored, the body lies on the outer surface of the other subframe.

As described above, the present invention allows the block body to be rotated in the front and back directions and moved in the left and right directions by the shaft, so that the block body can be enlarged to reliably hold heavy cargo boxes, and can also be stored using the support. It can be stored without making a large notch.

[Brief explanation of the drawing]

Fig. 1 is a side view of a dump truck equipped with the device of the present invention, Fig. 2 is a side view showing the cargo box lowering device, Fig. 3 is a front view when the block body is extended, and Fig. 4 is a side view of a dump truck equipped with the device of the present invention.
The figure is a front view of the block body when it is stored, FIG. 5 is a perspective view of the block body, and FIG. 6 is a side view of a dump truck equipped with a conventional block body. 1 is a chassis frame, 4 is a packing box, 8 is a mounting bracket, 9 is a bearing, 10 is a shaft, 11 is a block body, 12 is a contact surface, and 13 is a joint surface.

Claims (1)

[Claims] 1 The mounting bracket fixed to the chassis side frame and the mounting bracket bearing can be slid in the left and right direction.
It is composed of a shaft installed so as to be able to rotate in the front and back direction, and a block body whose base is fixed to the shaft, and when the block body is extended, the lower surface of the block body has a joint surface that can be joined to the upper surface of the frame. In addition, the upper surface of the block body is formed with a contact surface that can come into contact with the lower surface of the cargo box, and when the block body is stored, the side surface of the block body and the side surface of the frame correspond to each other. Box fall prevention device.