JP2000053207A - Rotary plate pushing down prevention device for packer type dust collecting vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent pushing down of a rotary plate and to permit smooth loading of dust by braking a rotary driving constituted equipment such as a hydraulic motor by a brake provided within the rotary driving constituted equipment such as the hydraulic motor rotating the rotary plate and compulsorily locking the rotary plate. SOLUTION: When a rotary plate is rotated and picks up fed dust and the rotation is stopped at a point of time when the rotary plate reaches a location which is substantially flush with a floor surface of a dust storing box, a braking plate 36 of a brake 31 is made in press-contact with a braking plate 34 by a compressive spring 35 and rotation of a hydraulic motor 6 is braked because a directional control valve 33 is switched to an F position and interrupts oil supply to the brake 31. Therefore, because the rotary plate is locked by braking force of the brake 31, the rotary plate is not pushed down, even if pushing down force is acted on the rotary plate when dust is penetrated. Because the directional control valve 33 is switched to an R position and supplies oil to the brake 31 after a penetrating plate penetrates dust into a dust storing box, braking of a rotary shaft of the hydraulic motor 6 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the rotation of a packer type refuse collection vehicle provided with a rotating plate and a pushing plate for cooperating loading of refuse thrown up and down in a tailgate into a refuse storage box. The present invention relates to a plate depression prevention device.

[0002]

2. Description of the Related Art FIG. 2 is a schematic view of a packer type refuse collection vehicle. In FIG. 2, reference numeral 1 denotes a dust collection box, and a bracket 2 is fixed to a rear upper end of the dust storage box 1, and a tail gate 4 is pivotally attached to the bracket 2 via a pivot 3. A rotary shaft 5 is mounted on a lower region in the tailgate 4, and a plate-shaped rotary plate 8 rotated by a rotary drive component device, for example, a hydraulic motor 6 and a chain reducer 7, is fixed to the rotary shaft 5. Have been.
A rotatable pivot shaft 9 is mounted above the rotation shaft 5, and the pivot shaft 9 has a plate-shaped pressing plate 1.
0 is fixed. The distal end of a piston rod 11a of a pushing cylinder 11 is pivotally connected to an end of the pushing plate 10 via a pin 12, and a rear end of the pushing cylinder 11 is a bracket 11b fixed to the tailgate 4.
Is pivotally connected to the motor through a pivot pin 11c.

A rear end of a lift cylinder 14 for raising the tail gate 4 backward is pivotally connected to the bracket 2 via a pivot 13. The tip end of a piston rod 14a of the lift cylinder 14 has a tail gate. 4 is pivotally attached to a bracket 15 fixed to the bracket 4.

[0004] On the other hand, a support bracket 16 is protruded from the lower rear end of the dust storage box 1.
And a frame 17 of the refuse collection vehicle are pivotally connected via a pivot 18. The frame 17 has a dump cylinder 1
The rear end of the dump cylinder 9 is pivotally connected, and the tip of the piston rod 19 a of the dump cylinder 19 is pivotally connected to the bottom of the refuse storage box 1.

The loading and discharging of dust in the above-mentioned packer-type dust collection vehicle is performed in the following manner. When dust is thrown into the lower part of the tailgate 4, the rotating plate 8 is rotated clockwise in FIG. 2 to scoop up the dust, so that the rotating plate 8 is substantially flush with the floor of the dust container 1. When the position is reached, the rotation is stopped. In the meantime, the pushing plate 10 is swung backward in FIG. 2 to stop at the retreat limit position and temporarily stands by, and the rotary plate 8 scoops up dust and stops at the above-described position.
Is pushed forward in FIG. 2 to push the dust on the rotary plate 8 into the dust storage box 1. Thereafter, the dust input and the above operation are alternately repeated, and the dust is sequentially stored in the dust storage box 1. When the loading operation is completed, after moving to the disposal site, the tailgate 4 is pivoted upward by the lift cylinder 14 in the counterclockwise direction in FIG. Subsequently, the dust storage box 1 is swingably dumped clockwise in FIG. 2 by the dump cylinder 19 with the pivot 18 as a fulcrum, and the dust stored in the dust storage box 1 is discharged by its own weight.

FIG. 3 is a hydraulic circuit diagram of the packer type refuse collection vehicle. In FIG. 3, reference numeral 20 denotes the hydraulic motor 6
A directional control valve 21 for the pushing cylinder 11; a directional control valve 22 for the lift cylinder 14;
Is a directional control valve of the dump cylinder 19, and the directional control valves 20, 21, 22, 23 are provided with a hydraulic pump 2
4 and a drain pipe 27 for collecting oil to an oil tank 26 are connected. In the middle of the supply pipe 25, a relief valve 28 as a safety device for the hydraulic circuit is incorporated. The hydraulic pump 24 is connected to a traveling engine 30 of a refuse collection vehicle via a power take-out device 29.

When the direction control valve 20 is switched to the F side, the hydraulic motor 6 rotates forward to rotate the rotating plate 8 clockwise in FIG. 2, and when switched to the R side, the hydraulic motor 6 rotates reversely. The rotating plate 8 is rotated counterclockwise in FIG.
When the directional control valve 21 is switched to the F side, the piston rod 11a of the push cylinder 11 protrudes to swing the push plate 10 forward in FIG. 11a retracts and pushes the pushing plate 10 backward and rearward in FIG. Also,
When the direction control valve 22 is switched to the F side, the piston rod 14a of the lift cylinder 14 projects and the tailgate 4
When the switch is switched to the R side, the piston rod 14a of the lift cylinder 14 retreats, and the tailgate 8 is rotated and lowered clockwise in FIG. When the direction control valve 23 is switched to the F side, the piston rod 19a of the dump cylinder 19 is projected to swing the refuse storage box 1 in a clockwise direction in FIG. The piston rod 19a of FIG. 2 retreats, and the dust storage box 1 is turned down in the counterclockwise direction in FIG.

[0008]

As described above, in the packer-type refuse collection vehicle, the trash picked up by the rotating plate 8 is pushed into the garbage storage box 1 by the pushing plate 10. It is necessary to hold the rotary plate 8 at a position substantially flush with the floor surface of the refuse storage box 1. It is supposed to.

However, when the loading of the refuse proceeds and the inside of the refuse storage box 1 becomes full of refuse, the pressing force of the pressing plate 10 acts on the rotating plate 8 by the reaction force of the refuse. Since the reverse rotation holding force of the hydraulic motor 6 and the frictional resistance of the deceleration mechanism 7 are weak in holding the rotating plate 8, the rotating plate 8 is pushed down by the pushing force of the pushing plate 10 when the dust is pushed. If the rotating plate 8 is pushed down when the dust is pushed in as described above, a step is formed between the dust storage box 1 and the rotating plate 8 so that the dust cannot be pushed in smoothly, and this causes an impact on the tailgate 4 and the like. In addition, damage may occur.

Therefore, in order to avoid such a problem,
Lock pins for preventing the rotating plate 8 from being pushed down are provided at predetermined positions on both side plates of the tailgate 4. The lock pin is provided on the side plate of the tail gate 4 so as to be able to protrude and retreat by being urged in the protruding direction by a compression spring, and to be turned downward when the rotating plate 8 rotates clockwise in FIG. Retreat by the formed tapered surface,
The rotation plate 8 is prevented from being pushed down while being protruded with respect to the rotation of the rotation plate 8 in the counterclockwise direction in FIG.

However, in the case of the lock pin, when the dust is loaded, the dust is caught and causes an operation failure. Therefore, it is necessary for the worker to frequently manually remove the dust caught in the lock pin. However, there has been a problem that the work is not easy to be performed because the removal work is troublesome, and the removal work is dangerous. Further, when the rotating plate 8 passes through the lock pin, an interference sound between the rotating plate 8 and the lock pin is generated, which causes a problem in noise.

It is an object of the present invention to provide a device for preventing a rotating plate from being pushed down of a packer type refuse collection vehicle, which solves the above-mentioned problems.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention scoops dust put in a tailgate to a position substantially flush with the floor of a dust storage box by rotating a rotary plate. In a packer type garbage truck that pushes and lifts the dust scooped up by the rotating plate into a garbage storage box by a pushing plate, a brake is provided in a rotary drive component device such as a hydraulic motor for rotating the rotating plate. The rotation plate is locked by locking a rotation drive component such as a hydraulic motor by a brake except when the rotation plate is rotated.

[0014]

FIG. 1 is a block diagram showing an embodiment of the present invention.
It will be described based on.

As shown in FIG. 1, in the present invention, a brake 31 is attached to the existing hydraulic motor 6 and the brake 31 is provided.
And a directional control valve 33 disposed in the branch pipe 32. The brake 31 has a braking plate 34 attached to the rotating shaft of the hydraulic motor 6 and a braking plate 36 urged by a compression spring 35 while being prevented from rotating. When the directional control valve 33 is switched from the F position to the R position, the compression shaft 35 presses the brake plate 36 against the brake plate 34 to stop the rotation shaft. As a result, the brake plate 36 is separated from the brake plate 34 against the compression spring 35 to release the rotation shaft of the hydraulic motor 6 from being stopped.

According to the rotating plate push-down preventing device configured as described above, the rotating plate 8 is rotated clockwise in FIG. 2 to scoop up the dust, so that the dust is substantially flush with the floor surface of the dust container box 1. When the rotation of the brake 31 is stopped at the point when the rotation reaches the position, the direction control valve 33 is switched to the position F and the oil supply to the brake 31 is shut off. The rotating shaft of the hydraulic motor 6 is stopped by being pressed. When the rotating shaft of the hydraulic motor 6 is stopped by the brake 31 in this manner, the rotating plate 8 rotated by the hydraulic motor 6 is also forcibly locked by the stopping force of the brake 31, so that when the dust is pushed in, the rotating plate 8 Even if the pushing force of the pushing plate 10 acts on the rotating plate 8, the pushing down of the rotating plate 8 can be reliably prevented. Then, after the pushing plate 10 pushes the dust into the dust container 1, the direction control valve 33 is switched to the R position and the brake 31 is refueled.
The brake plate 36 of the brake 31 is separated from the brake plate 34 by hydraulic pressure against the compression spring 35, and the hydraulic motor 6
The stop of the rotating shaft is released.

Although the above-described embodiment is one of the most preferable examples for carrying out the present invention, the present invention is not limited to this, and various modifications and alterations are possible based on the knowledge of those skilled in the art.
It can be implemented in an improved mode. For example, in the present embodiment, the brake 31 is provided on the hydraulic motor 6, but a similar brake 31 is provided in a rotary drive component for rotating the rotary plate 8 such as the chain reducer 7 other than the hydraulic motor 6. Does not change the effect. Further, in the present embodiment, the brake 31 is released by hydraulic pressure, but it is also possible to release the brake 31 by air pressure or electric force.

[0018]

As described above, according to the present invention,
A brake is provided in a rotary drive component such as a hydraulic motor for rotating the rotary plate, and the brake stops a rotary drive component such as a hydraulic motor to forcibly lock the rotary plate. When pushing the dust, even if the pushing force of the pushing plate acts on the rotating plate, the pushing of the rotating plate can be reliably prevented, and the dust can be loaded smoothly. Therefore, it is not necessary to frequently remove dust, and it is possible to provide an apparatus for preventing the rotating plate from being pushed down, which is excellent in workability and safety and does not generate noise.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram of a rotation plate push-down prevention device according to the present invention.

FIG. 2 is a schematic view of a packer type refuse collection vehicle.

FIG. 3 is a hydraulic circuit diagram of the packer type refuse collection vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust storage box 4 Tail gate 6 Hydraulic motor 7 Reduction mechanism 8 Rotating plate 10 Pushing plate 11 Pushing cylinder 14 Lift cylinder 19 Dump cylinder 20 Directional control valve of rotary motor 21 Directional control valve of pushing cylinder 22 Directional control valve of lift cylinder 23 Dump cylinder direction control valve 24 Hydraulic pump 25 Supply pipe 26 Oil tank 27 Drain pipe 31 Brake 32 Branch pipe 33 Brake direction control valve 34 Brake plate 35 Compression spring 36 Brake plate

Continuing from the front page (72) Inventor Takashi Tasoe 1-48 Jinbucho, Yao City, Osaka Prefecture Inside Morita Econos Co., Ltd. (72) Inventor Junichi Suzuki 1-48 Jinbucho Yao City, Osaka Prefecture F Term in Morita Econos Co., Ltd. (Reference) 3E024 AA01 AA04 AA08 BA02 CA05 HA02 HB02 HB04 HC03 HD03

Claims (1)

[Claims] 1. The dust put into the tailgate is scooped up by rotating the rotating plate to a position substantially flush with the floor of the dust container box, and the dust scooped up by the rotating plate is pushed by the pushing plate. In a packer-type refuse collection vehicle that is pushed into and accommodated in a refuse storage box, a brake is provided in a rotary drive component device such as a hydraulic motor for rotating the rotating plate, and a hydraulic motor or the like is operated by the brake except when the rotating plate is rotated. A rotation plate locking device for a packer-type refuse collection vehicle, wherein the rotation drive component device is stopped to lock the rotation plate.