JPH0452165Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is an improved control circuit for a garbage loading device that is temporarily used to scrape out the garbage remaining inside the tailgate during garbage discharge. It relates to an operation control device.

(Prior art) Generally, a tailgate with a built-in garbage loading device is connected to the rear opening end of a garbage storage box, and the garbage thrown into the tailgate is collected into the garbage storage box by the garbage loading device. 2. Description of the Related Art Garbage collection vehicles are known that are capable of transporting collected garbage to a garbage treatment plant and then discharging it to the outside.

This type of garbage collection vehicle has a tightening device that tightens the garbage storage box and the tailgate, and when loading garbage, the tightening device tightens them, and under this condition, the garbage loading device is activated to store the garbage. It is designed to collect garbage inside the box. On the other hand, when garbage is to be discharged, the tightening device is released, and then the tailgate is dumped rearward to discharge the garbage to the outside.

With such a device, when the tailgate is dumped during garbage discharge, there is a risk that the garbage in the tailgate will not be completely discharged to the outside and may remain there. If debris remains during dumping, the center of gravity of the vehicle will shift to the rear, creating the risk of the vehicle overturning. Therefore, in order to prevent garbage from remaining inside the tailgate during dumping, the garbage loading device for loading garbage is temporarily activated to completely scrape out the garbage remaining inside the tailgate. .

Conventionally, as this type of discharge operation control device, for example, as disclosed in Japanese Patent Application Laid-open No. 188201/1983, there is a control circuit for loading and discharging garbage that controls the loading and unloading operation of the loading device even if it is not tightened by the tightening device. Some have an individual operation switch that can be used to carry out the loading operation, and others, as disclosed in Japanese Patent Application Laid-Open No. 59-138510, have a control circuit for loading and discharging garbage with a function to reverse the pushing plate and a tightening mechanism. An operation switch that allows the loading device to perform loading work even when the device is not tightened is incorporated individually, and this operation switch is installed in the driver's seat. In the control circuit for loading and discharging garbage, there is an operation switch that can detect when the tailgate is tilted by a predetermined angle and stop the tailgate, as well as cause the loading device to perform the loading operation. Various proposals have been made in which the control switch is installed individually and the operating switch is provided in the driver's seat.

(Problem to be solved by the invention) However, in all of the above conventional examples, regardless of whether the input port provided in the tailgate is blocked by the door panel, the driver cannot operate it at will. The problem was that this work was sometimes carried out with the loading port open because the loading device was designed to allow the loading operation, that is, to scrape out the debris remaining inside the tailgate. The point was hot.

In other words, from the standpoint of safety, it is desirable to perform this work from the driver's seat, but doing so may prevent carelessness since it is not possible to check the situation behind the driver. There was a risk that the switch would be turned on and the worker at the rear could be caught in the rotary plate of the garbage loading device seen through the inlet.

In view of the above, the present invention was developed from the viewpoint of safety, even if the dust remaining inside the tailgate is scraped out from the driver's seat by operating the driver's seat, the operator behind the tailgate will be caught in the rotating plate of the dust loading device. The purpose is to provide something that will not be lost.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a tailgate with a built-in garbage loading device at the rear of the garbage storage box, so that the garbage remaining in the tailgate when the garbage is discharged is removed. In the discharge operation control device for a garbage collection vehicle configured to discharge garbage to the outside by operating the garbage loading device, a door panel that can freely close an input port formed by opening at the rear of the tailgate is closed. a switch that detects that the door panel is closed, and a scraping operation switch that instructs the operation of the garbage loading device when discharging the garbage, provided that the switch detects that the door panel is in the closed state, The present invention is characterized in that the garbage loading device can be operated by a scraping operation switch when discharging the garbage.

(Function) According to the present invention, when the scraping operation switch is turned on after dumping the tailgate when discharging garbage, the garbage loading device is activated and the garbage remaining in the tailgate is scraped out to the outside. . however,
The condition is that the door panel is closed, and if it is open, the garbage loading device will not operate even if the operation switch is turned on.

(Embodiment) Hereinafter, an embodiment of the discharge operation control device according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram showing the structure of a garbage collection vehicle to which the present discharge operation control device is applied. Code 1 in the diagram
indicates a garbage storage box, and a tailgate 3 is pivotally attached to the rear of the garbage storage box 1 via a support shaft 2 so as to be able to be dumped rearward. An input port is formed at the rear of the tailgate 3, and a door panel 4 that can freely close the input port is installed there. Further, inside the tailgate 3, there are provided a rotating panel 6 that can freely rotate around a shaft 5 and a push-in panel 8 that can swing around a shaft 7. The panel 8 is driven by a pushing cylinder 10. Also, the tailgate 3 is connected to the dump cylinder 1
1. On the other hand, the garbage storage box 1 is
It is mounted on top and can be dumped around a support shaft 13. The garbage storage box 1 is the body cylinder 1
It is driven by 4. Further, the garbage storage box 1 and the tailgate 3 can be tightened by a tightening device 15. The tightening device 15 is driven by a tightening cylinder 16 .

When loading garbage, the garbage thrown in from the input port is temporarily stored in the tailgate 3, then scooped up by the rotating panel 6, and pushed into the garbage storage box 1 by the push panel 8 (Fig. 1). ). Here, the garbage storage box 1 and the tailgate 3 are tightened by a tightening device 15. This is to prevent the tailgate 3 from floating rearward due to the reaction force of the garbage applied to the garbage loading device. When discharging garbage, the tailgate 3 is dumped rearward (FIG. 2), and then the garbage storage box 1 is dumped (FIG. 3), and the garbage in the garbage storage box 1 is slid backward. Here, as a matter of course, the tightening by the tightening device 15 has been released.

Figure 4 is a hydraulic circuit diagram of the garbage collection vehicle.

T indicates an oil tank, P indicates a hydraulic pump, and the pump P is driven by the engine for driving the vehicle. The motor 9 and each cylinder 10, 11, 14, 16 are connected to the hydraulic pump P via switching valves V1 to V5. SoL1 to SoL10 are each switching valve V1 to V5
This is a solenoid.

FIG. 5 is a diagram showing the arrangement of switches constituting the control device for the garbage collection vehicle.

No. 1 is a switch that instructs the push panel 8 to move backward; No. 2 is a switch that stops the push panel 8 from moving backward; No. 3 is a switch that stops the rotation of the rotating panel 6 and at the same time instructs the push panel 8 to move forward; No. 4 is a switch that stops the forward movement of the push panel 8; No. 5 is a switch that detects that the tightening device 15 is disengaged; No. 6 is a switch that detects that the tightening device 15 is engaged;
No.7 is a switch that detects the lowering of the tailgate.
No. 8 is a switch that detects that the door panel 4 is closed.

FIG. 6 is a control circuit diagram of the garbage collection vehicle.

Sws is a selection switch connected to the power supply, and either discharge circuit A or loading circuit B is selected by this switch. A body switch 20 is connected to the exhaust circuit A side, and when it instructs to raise, SoL1
When the SoL2 is energized, the garbage storage box 1 rises, and when a descending command is given, the SoL 2 is energized and the garbage storage box 1 is lowered. In addition, a dump switch 21 is installed on the discharge circuit A side.
is connected, and when a descent is commanded, SoL3 is energized and the tailgate 3 is lowered, and during the descent, SoL10 is energized via switch No. 7, the tightening device 15 is held in the opening direction, and the tailgate is lowered. When the descent of step 3 is completed, switch No. 7 is switched,
SoL9 is energized and the tightening device 15 operates in the closing direction. Here, if the tightening device 15 is disengaged, the buzzer Bz sounds via switch No. 5, and if it is engaged, SoL2 is energized and the garbage storage box is
is urged toward the descending side and prevented from floating. On the other hand, when the dump switch 21 instructs to raise, if the tightening device 15 is released, SoL4 is energized via switch No. 5 and the tailgate 3 is raised.
If it is engaged, SoL10 is energized and the tightening device 15 is disengaged, and then SoL4 is energized and the tailgate 3 is raised.

Switch No. 6 of the tightening device 15 is on the loading circuit B side.
is connected, and when loading is instructed, each button of emergency stop PB5, push panel 8 retreat PB4, push panel 8 forward PB3, and rotation panel 6 reverse rotation PB2 is pressed, provided that the tightening device 15 is engaged. The current flows through the button of automatic loading PB1. Each of these buttons PB1 to PB5
As is clear from FIG. 1, it is attached to the operation panel 22 at the rear of the tailgate 3 to facilitate operations at the rear. When button PB1 is pressed, the relay
The rotary solenoid R/S is energized via CR, and the rotation speed of the vehicle's driving engine (not shown) is increased. This engine has a hydraulic pump P (Fig. 4)
to drive. Also, the switch can be activated via relay CR.
Current flows from No. 1 to No. 4 and a series of loading operations begins. When the current flows, SoL7 is energized via switches No. 3 and No. 4, and the rotating panel 6 starts rotating in the clockwise direction. Switch No. 3 comes off midway through, but switch No. 4 is bypassed and SoL 7 is energized, so rotation continues. Switch No. 1 comes off later than switch No. 3, and when it comes off, SoL5 is energized via switches No. 2 and No. 1, and the push-in panel 8 starts to retreat. At the start of reversing, switch No. 4 is released, and the retraction of the push-in panel 8 is stopped when switch No. 2 is turned on at the retraction limit position. When switch No. 3 is turned on, the rotation of the rotary panel 6 is stopped as SoL7 is deenergized, and when this is turned on, SoL6 is energized via switch No. 4, and the push-in panel 8 starts moving forward. The forward movement of the push-in panel 8 is stopped when switch No. 4 is turned on at the forward limit position. This completes the series of loading operations.

The discharge circuit A and the loading circuit B described above have the same configuration as those already proposed.

According to the present invention, the selection switch Sws
Switch No. 8 (Fig. 5), which can detect that the door panel 4 is closed, is connected to the discharge circuit A side contact of the Include button PB1
and relay CR. This operation switch PB6 is provided in the driver's seat 23, as is clear from FIG.

Next, the operation of the present discharge operation control device will be explained.

When the tailgate 3 is dumped by turning the selection switch Sws to the discharge side and the dump switch 21 to the up side in Fig. 6 (Fig. 2), the driver confirms this and turns the operation switch PB6. Then, on the condition that the door panel 4 is closed, that is, on the condition that switch No. 8 is turned on, current flows to the relay CR in the loading circuit B, and the series of loading operations as described above starts. . Dust 25 remaining inside the tailgate 3 is scraped out by the rotating panel 6 and pushed out by the push panel 8 (FIG. 2). Also,
If switch No. 8 is off, that is, if door panel 4 is open, scraping will not be performed even if operation switch PB6 is turned on. In addition, to activate the garbage loading device and collect garbage, press the automatic loading button as before.
All you have to do is press PB1, and in this case there is no problem even if the door panel 4 is open.

Further, even after stopping dumping of the tailgate 3 midway and returning the dump switch 21 to the neutral position, if the operation switch PB6 is turned on, the above-mentioned scraping of the garbage will be performed. At this time as well, the condition is that the door panel 4 is closed.

According to the present invention, the operation switch PB6
Even if the door panel 4 is inserted, the garbage loading device will not operate if the door panel 4 is not closed.
The driver accidentally operated switch PB6 while it was open.
It is possible to avoid the danger of a worker near the rotating panel 6 being caught in the rotating panel 6. In addition, it has a simple configuration that only requires installing switch No. 8 and operation switch PB6 between discharge circuit A and loading circuit B, so it can be easily applied to existing vehicles without making major changes to the control circuit. becomes possible.

(Effect of the invention) With the above configuration, according to the invention,
Only when the rotating plate of the garbage loading device, where workers may get caught, is securely shielded with a door panel.
Dust remaining inside the tailgate can be scraped out to the outside.For example, from the standpoint of safety, it is possible to scrape out the dust remaining inside the tailgate by operating it from the driver's seat. Even if this is done, it is possible to prevent the worker from being caught in the rotating plate of the garbage loading device, thereby improving safety.

[Brief explanation of the drawing]

Figure 1 is a side view showing the structure of the garbage collection vehicle, Figure 2 is a side view showing the structure of the garbage collection vehicle.
The figure is a side view with the tailgate dumped.
Fig. 3 is a side view of the state in which the garbage storage box has been further dumped from the state shown in Fig. 2, Fig. 4 is a hydraulic circuit diagram of the garbage collection vehicle, Fig. 5 is a diagram of the arrangement of switches, and Fig. 6 is a diagram of the arrangement of the switches.
The figure is a control circuit diagram of the present discharge operation control device. 1... Garbage storage box, 3... Tailgate, 4...
... Door panel, 6 ... Rotating panel, 8 ... Push panel, 9 ... Hydraulic motor, 10 ... Push cylinder, 11 ... Dump cylinder, 14 ... Body cylinder, 15 ... Tightening device, 16 ... Tightening cylinder , 21... Dump switch, No. 8... Switch that detects that the door panel is closed, PB6...
...Scraping operation switch.

Claims (1)

[Scope of utility model registration request] A garbage collection vehicle having a tailgate with a built-in garbage loading device at the rear of a garbage storage box, and configured so that garbage remaining in the tailgate when discharging garbage can be discharged to the outside by operating the garbage loading device. The discharge operation control device includes a switch that detects that a door panel that can freely close an input port formed at the rear of the tailgate is closed, and an instruction to operate the garbage loading device when discharging garbage. and a scraping operation switch that operates the garbage loading device when discharging garbage, provided that the switch detects that the door panel is in a closed state. Discharge operation control device for garbage collection vehicles.