JPS58101833A - Drop preventive device of loading bed in dump truck - Google Patents

Abstract

PURPOSE:To reduce the load applied to a block body axially supporting part in a device which is supported with a bearing to a chassis frame to prevent a drop of a loading bed through a block body, by forming a bottom surface of the block body jointable to the upper surface of said frame at holding of the loading bed. CONSTITUTION:This device 7 is mounted in the vicinity of a hinge part at tilting of a loading bed 4 to a subframe 2 on both left and right chassis frames in the bottom of the dump truck loading bed 4 and stored to be in a condition as in a chain line in the rear part of the frame 2 at fixing of the bed 4. then said device 7 is contained with a block body rotatably supported through a shaft 10 to a pair of left and right brackets 8 welded to said frame 2, and a drop of the bed 4 is prevented by turning said block body 9 to the rear. This block body 9 is formed to a hollow body, and a notched hollow part provided in a bottom end front angular part is fitted and welded to the shaft 10, while a joint face 13 jointed to the frame 2 at extension is provided to the bottom face of the block body 9.

Description

[Detailed Description of the Invention] The present invention has a block body installed between the chassis frame and the cargo box so as to be supported by #J backward swinging, so that if the ladle cargo box is skewed due to an erroneous operation, However, it is possible to reliably prevent the cargo boxes from falling upward.
It's about the bird's device.

General F The chassis frame is pivotably supported by the t block, and the fc block body prevents the cargo box from falling. However, in case of a precaution, the heavy cargo box that is lowered cannot be supported by the @t block body. Therefore, it is necessary to strengthen the strength of the hinge part of the block body, especially in consideration of the possibility that a large impact will be applied to the hinge part.

By the way, if the strength of the hinge part of the conventional structure 11 is strengthened, the strength of the entire plotter must be strengthened, and the weight of the block body becomes heavy due to stiffness. I need strength.

A serious problem arose.

The present invention provides a cargo box prevention device for a dump truck in which the hinge portion has a strong strength, the block body has a light weight, and the block body has a light weight.

Embodiments of the present invention will be described below with reference to the drawings.
c[Subframe (21 power); Also, the subframe 12+ upper Vr has a receiving tree (3) attached to it.

(41 is a loading box 1 which is tilted tljJ'''r' around the subclaim (hinge part I5 at the rear of 21),
This number of boxes 141 is lowered and the negative value γ is the lower surface of the cargo box (4) joined to the upper surface of the receiving tree 13).

The sub-frame (21) and the cargo box 141 have a cargo box lifting device (6) at the front and a cargo box lowering prevention device (7) which will be described later at the rear near the hinge section (5). This luggage fall prevention device fit 17+ is installed in the subframe (2) by removing a part of the support tree (3) corresponding to the rear part and storing it in this part C17-. There is.

Next, the cargo box drop prevention device (7) will be explained.
At the hinge part (slightly forward of Φ, attach the base to the subframe (2
) on both sides of the subframe (21
A pair of left and right mounting brackets protruding from the top surface +81
+81 is the name of the game. mounting bracket) +811
81 is a shaft (1G is rotatably installed, this shaft) C1 that swings the block body (9) to be described later back and forth.
The lower surface of the sub-frame (21) is attached close to the upper surface of the sub-frame (21).The block body (9) is formed of a hollow body with a closed cross section, and the width of this block body (9) is
The width of the LIl/i subframe (2) is approximately the same as the width, and there is no width;
In addition, the height of the block body +91 should be approximately the same as the height of the support block (3), and the length of the block body (9) should be negative by storing it in the notch of the subframe (bracket 13 on the rear upper surface of 21). It has a long length.

The block body +91 T: Front angle of the surface sKR A cutout recess α11 is formed, and the shaft αG is fitted into the cutout recess 1111VC and all joint edges are welded, thereby connecting the block body (9) and the shaft α. [and are integrally formed.]

The upper surface of the block body (9) forms a smooth contact surface with the 1079 body (9) and the lower surface at the time of the loading box forming a right angle.
The lower surface of the 9th body (9) is connected to the upper surface of the sub-frame 121 (13 pieces are formed,
When the load box 0 and the small block body 191 are lowered by pulling, the shock at the point where the receiver is stopped is the shaft (the subframe where the IC and the hinge part of the mounting bracket (8) 2 and the lower surface of the block body (9) are joined) Supported on the surface of 21 -f-fuko)-fnafu. Note that the circle indicates the operation section.

The present invention has the following configuration, and when the loading box decoy is now in contact with the upper surface of the support tree (3) and the running state f is, the block body (9) is connected to the subframe (21 It is stored lying on the top of the ha.

Next, lift the cargo box I41 to an appropriate height using the lifting device (6), and move the block body (9) by 1 degree to the center of 111Ft and turn it backwards 1llJ.2, Block body (9)
The lower surface 1J of the subframe (21) h[fiF is connected to the solid line position f'''r'r in FIG. 1 to ensure that it is '7'.

After that, we carried out maintenance and inspection of the hydraulic system between the cargo box (4) and the chassis frame (21), and if the cargo i+41 suddenly fell F[, 9, but this cargo box (4) )
The blower 7 body (9) is used to stop the receiver and damage A/I- (allowing you to work with peace of mind).

In addition, when performing maintenance and inspection, it is recommended that the top surface of the block body (9) and the bottom surface of the packing box (J, & Kumefu.

As described above, the present invention has a block body similar to a hollow body f'''r'r shape having a closed cross section, and the weight reduction of the block body is '7' negative.
In addition, a cutout recess is formed in the front corner of the lower surface of the block body near the cylindrical part, and the shaft is fitted into this recess. Is it necessary to install a strong rope, reinforcing plate, and make the entire block lighter? l, R0 Furthermore, since the load acting on the block body f is supported at two places: the hinge, the joint surface between the block lower surface μ and the subframe surface, the occurrence of concentrated stress is also small.

[Brief explanation of the drawing]

@Figure 1 is a side view of a gunbuker equipped with the device of the present invention, Figure 2 is a side view showing the cargo box drop prevention device, and Figure 3 is a side view of the truck equipped with the device of the present invention.
- is a front view of Fig. 2, and Fig. 4 is an enlarged perspective view of the hinge part of the 1079 body with dimensions indicated. (1) is the chassis frame, +81H mounting bracket, (
9) ld 7' o tsu'7 a, fl(lid -,
t ya7 t, an h-x? J missing WJ M, the stop will be the joint surface. Applicant: Kudong Kaihatsu 1 Co., Ltd. Figure 2

Claims (1)

[Claims] A pair of left and right mounting brackets whose bases on both sides of the chassis side frame are joined and welded so that their tips protrude in the E direction from the top surface of the frame, and a shaft rotatably installed at the tip of the mounting plat. It consists of at least a hollow block body with a closed cross section that swings back and forth around the shaft.
1. For the front block body, 1: A notch recess is formed at the front corner of the end, the shaft is fit and welded into this notch recess, and the block body is further tilted rearward upward to prevent overhang.
[rI'i The rear lower surface of the block body is joined to the upper surface of the frame.A device for preventing cargo boxes from dropping in a dump truck.