JPH0541072Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is used in the field of dump vehicles that tilt cargo boxes.

(b) Prior Art Generally, a dump vehicle is provided with a tilting device for tilting a cargo box and a drive device for driving the tilting device.

By the way, both devices should be placed between the left and right chassis frames of the car body to prevent damage, improve the left-right balance of the vehicle, and give a clean appearance, but since the space between the chassis frames is very narrow, it is difficult to accommodate them all. Since the tank and valve, which are part of the drive device, are placed outside the chassis frame, the piping for connecting both devices must pass through the chassis frame.

On the other hand, a tree support is fixed on the vehicle body to provide a buffering effect to the cargo box when it is at its lowest point.

Therefore, conventionally, a part of the piping that communicates the tilting device and the drive device has a structure in which it passes through a gap between the front and rear brackets fixed on the chassis frame.

(c) Problems to be solved by the invention By the way, in the structure described above, the material of the receiving tree is generally wood or plastic, and the shipping box is metal, so after many years of use, the receiving material will deteriorate due to repeated contact with the shipping box. is deformed and the height of the tree becomes lower.

Therefore, there is a risk that the cargo box approaches the chassis frame and the pipes passing between the front and rear tree supports are crushed by the cargo box.

Therefore, the present invention provides a piping protection device for a dump vehicle that ensures a gap between the vehicle body and the cargo box side even if the receiving tree is deformed, and prevents damage to the pipes passing between the front and rear receiving trees. It is something.

(d) Means for Solving the Problems The present invention solves the above-mentioned problems by installing a cargo box on the vehicle body so that it can tilt, and on the vehicle body, there is a structure that allows the cargo box to come into contact with the cargo box when it is at its lowest point. A receiver made of wood or the like is divided into front and rear parts and fixed to provide a buffering effect, a tilting device for tilting the cargo box is provided inside the vehicle body, and a drive device for operating the tilting device is provided outside the vehicle body. In a dump vehicle, in which a part of the piping that connects the tilting device and the drive device is inserted through the gap between the front and rear supports, the lower surface of the cargo box side or the upper surface of the vehicle body is provided with a lowermost portion of the cargo box. A stopper member located in the gap is fixed while being offset from the pipe, and the height of the stopper member is lower than the height of the support tree and higher than the outer diameter of the pipe.

(e) Effect Start the drive to activate the tilting device.

When the tilting device is operated, the cargo box side is dumped and unloading work is performed, and after the work is completed, the cargo box side is lowered and brought into contact with the receiving tree.

At this time, even if the support tree is deformed due to long-term use, the stopper member can ensure a gap between the vehicle body and the cargo box side, thereby preventing damage to the piping.

(f) Example An example will be described below with reference to the drawings. Reference numeral 1 denotes a vehicle body having a pair of left and right chassis frames 2, 2, and a metal cargo box 3 is mounted on the vehicle body 1 in a tiltable manner. . On one side of the pair of chassis frames 2, 2, there is a long support 4 made of a material having a buffering effect, such as wood or plastic, and on the other side, a gap 5 is provided by dividing the support into the front and back. Front and rear supports 6 and 7 made of the same material as the tree 4 are provided.

Reference numeral 8 denotes a metal dump frame forming a part of the cargo box 3. The dump frame 8 is pivotally supported on the rear part of the vehicle body 1 so as to be tiltable, and when lowered, supports 4, 6,
7 so as to come into contact with the top surface.

Reference numeral 9 denotes a cargo box main body forming a part of the cargo box 3. The cargo box main body 9 tilts together with the dump frame 8 and slides backward on the dump frame 8 by a slide cylinder 10 attached to the dump frame 8. I'm starting to be able to do it.

When the cargo box main body 9 slides rearward, the support legs 11 vertically installed at the rear of the cargo box main body 9 touch the ground, and when the sliding door 12 which also serves as a step board is opened, a crawler type construction vehicle (for example, a shovel car) can be loaded. It is becoming possible to do this.

13 is a tilting device for tilting the cargo box 3;
The tilting device 13 is composed of a cylinder 14 and a plurality of frames 15, and includes a pair of chassis frames 2, 2.
It is installed between the chassis frames 2, 2 and the dump frame 8.

Reference numeral 16 denotes a drive device for operating the tilting device 13 and the slide cylinder 10, and the drive device 16 includes a pump 17 driven by a traveling engine (not shown), a tank 18 containing oil, and a tank 18 for storing oil. The pump 7 has a tank 18 between the chassis frames 2 and 2.
The valve 19 is located outside the chassis frame 2 (lower side in FIG. 4).

Piping 20 between the pump 17 and tank 18
and piping 21 between the pump 17 and the valve 19 are connected to each other through the bottom of the chassis frame 2,
Since the piping 22 between the valve 19 and the cylinder 14 and the piping 23 between the valve 19 and the slide cylinder 10 must be connected to the upper surface of the valve 19, the front and rear supports are larger than the outer diameter of the piping 22 and 23. They are connected by passing through gaps 5 of 6 and 7 in parallel.

Reference numeral 24 denotes a pipe that communicates between the tank 18 and the valve 19. Reference numeral 25 denotes a block-shaped stopper member fixed to the underside of the dump frame 8, which maintains the gap 5 between the chassis frame 2 and the dump frame 8.

The stopper member 25 is made somewhat lower than the height of the tree support 5 so that it does not come into contact with the chassis frame 2 under normal conditions.
It makes contact only when the receiving tree 5 is deformed,
In addition, the dump frame 8 is made higher than the outer diameter of the pipes 22, 23 so that it does not crush the pipes 22, 23 even if it comes into contact with the chassis frame 2, and furthermore, when the cargo box 3 is lowered to its lowest position, the stopper member 25 is 5 and is located at a position offset from the pipes 22 and 23.

At this time, since the stopper member 25 does not normally come into contact with the chassis frame 2, no external force acts on it, and is not deformed, the same effect can be achieved even if the stopper member 25 is made of any material such as wood or metal.

Although the embodiment describes a dump vehicle in which the cargo box body is slidable, the same effects can be obtained even if the dump vehicle has only the cargo box body and does not have a dump frame.

In that case, the stopper member will be provided on the main body of the cargo box.

Further, the part of the drive device disposed outside the chassis frame is not limited to the embodiment, and any part of the drive device can have the same effect. Further, the mounting position of the stopper member is not limited to the cargo box side, but the same effect can be obtained even if it is mounted on the vehicle body side.

The present invention has the above-mentioned structure, and its operation will be explained next. First, when discharging the loaded earth and sand, the valve 19 is switched, and the pressure oil from the pump 17 is supplied to the cylinder 14 through the pipe 21, the valve 19, and the pipe 22. Then, the tilting device 13 is operated to fully dump the cargo box 3 (approximately 50 to 60 degrees) as shown in FIG.

When the dumping is completed, the cargo box 3 is lowered by its own weight, etc., and the dump frame 8 is moved to the tree supports 4, 6, 7.
It comes into contact with and stops.

When loading a construction vehicle, the valve 19 is switched to dump the cargo box 3 at a specified angle (approximately 15 degrees).
Furthermore, the valve 19 is switched to the slide cylinder 10
3, and the cargo box body 9 is slid backward. In this state, the construction vehicle is loaded.

After the loading operation is completed, the operation is reversed to the above, and the dump frame 8 is lowered, and the dump frame 8 is brought into contact with the wooden supports 4, 6, and 7, and then stopped.

By the way, if the above-mentioned work is repeated for many years, the tree supports 6 and 7 may be deformed and the height of the tree supports 6 and 7 may become lower because they are made of wood or the like.

In that case, the lower end of the stopper member 25 comes into contact with the upper surface of the chassis frame 2 to prevent the cargo box 3 from further descending, thereby preventing the pipes 22 and 23 from being damaged.

(g) Effects of the invention As described above, the present invention has the following advantages:
A stopper member made of wood or the like that is lower than the height of a buffering tree is installed, and if the tree deforms and becomes lower due to long-term use, the stopper member can be placed against the vehicle body or cargo box side. Since they are in contact with each other, the gap between the vehicle body side and the cargo box side can be reliably maintained even after the receiving tree is deformed, and damage to the pipes passing through the gap can be prevented.

[Brief explanation of the drawing]

Figure 1 is the overall view, Figure 2 is the overall view during full dumping, Figure 3 is the overall view when the cargo box body is sliding, and Figure 4 is the overall view when the cargo box body is sliding.
The figure is a top view of the vehicle body, and FIG. 5 is a sectional view taken along line AA in FIG. 1 is a tree receiver, 3 is a packing box, 5 is a gap, 6 and 7 are tree receivers, 13 is a tilting device, 16 is a drive device, 22, 2
3 is piping, and 25 is a stopper member.

Claims (1)

[Scope of utility model registration request] A cargo box 3 is provided on the vehicle body 1 so as to be tiltable, and on the vehicle body 1, supports 6 and 7 made of wood or the like are divided into front and rear parts for cushioning the cargo box 3 when it comes into contact with the cargo box 3 when it is at its lowest point. A tilting device 13 for tilting the cargo box 3 is provided on the inside of the vehicle body 1, and a drive device 1 for operating the tilting device 13 is provided on the outside of the vehicle body 1.
6, the tilting device 13 and the drive device 1
In a dump vehicle in which a part of the pipes 22, 23 that communicate with At times, the stopper member 25 located in the gap 5 is fixed so as to be offset from the pipes 22, 23, so that the height of the stopper member 25 is lower than the height of the brackets 6, 7, and the pipes 22, 2 are fixed.
A piping protection device for dump vehicles that is higher than the outer diameter of 3.