JPH052483Y2 - - 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 discharging garbage, the tightening device is released, and then
The tailgate is dumped rearward, and the garbage storage box is dumped upward, so that the garbage inside the garbage storage box slides down and is discharged 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, various discharge operation control devices have been proposed for this purpose (for example, Japanese Patent Application Laid-Open Nos. 188201-1982, 138510-1980, and 15301-1980).
(see publication). The devices described in these publications are provided with a separate scraping operation switch so that the garbage loading device can be operated with the tailgate dumped, that is, with the tightening device released. By operating this, the dust remaining inside the tailgate is scraped out.

(Problem that the invention aims to solve) By the way, the separate dust scraping operation switch is installed in the driver's seat for safety reasons, so the driver can confirm that the tailgate has been dumped. After that, you are required to operate this switch. However, if the driver forgets to turn this switch on, the garbage remaining in the tailgate will not be scraped out, and if the garbage storage box is dumped in this state, as is clear from Figure 3. The problem remains that the center of gravity of the vehicle moves significantly backwards, causing it to overturn.

Therefore, the purpose of the present invention is to solve the above-mentioned problems of the conventional technology, to ensure that the dust remaining in the tailgate can be scraped out to the outside, and to prevent the vehicle from overturning when it is discharged. An object of the present invention is to provide a discharge operation control device for a garbage collection vehicle.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a tailgate having a built-in garbage loading device at the rear of the garbage storage box, and the tailgate is configured to dump the garbage to the rear. In the discharge operation control device for a garbage collection vehicle, which is configured to dump the front end of the garbage storage box upward, thereby causing the garbage in the garbage storage box to slide backward and be discharged to the outside, when the garbage is discharged. a scraping operation switch capable of instructing the operation of the garbage loading device; and a relay that is self-held via its first normally open contact when the switch is turned on; The present invention is characterized in that an open contact is incorporated into a circuit for instructing dumping of the garbage storage box, so that the garbage storage box is not dumped unless the garbage loading device is operated by the scraping operation switch.

(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. . after that,
Dumping of the garbage storage box is performed on the condition that this garbage loading device is operated. That is, unless the scraping operation switch is turned on, the garbage storage box will not be dumped even if instructed to do so.

(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. Also, inside the tailgate 3, there is a rotating panel 6 that can freely rotate around the shaft 5, and a push-in panel 8 that can freely swing around the shaft 7.
The rotary panel 6 is equipped with a hydraulic motor 9,
The push panel 8 is driven by a push cylinder 10.
Further, the tailgate 3 is driven by a dump cylinder 11. On the other hand, the garbage storage box 1 is mounted on a vehicle chassis 12 and can be dumped around a support shaft 13. The garbage storage box 1 is driven by a body cylinder 14. In addition, garbage storage box 1 and tailgate 3
can be tightened with 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 the garbage is discharged, it is dumped to the rear of the tailgate 3 (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 V
1 to V5 solenoids.

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

NO1 is a switch that instructs the backward movement of the push panel 8, NO2 is a switch that stops the backward movement of the push panel 8, and NO3 is a switch that stops the rotational movement of the rotary panel 6 and at the same time instructs the forward movement of the push panel 8. NO4 is a switch that stops the forward movement of the push panel 8, NO5 is a switch that detects that the tightening device 15 is removed, NO
6 is a switch that detects that the tightening device 15 is engaged, and NO7 is a switch that detects lowering of the tailgate.

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

Swm is a selection switch connected to the power supply, and either the discharge circuit A or the 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, the SoL
1 is energized and the garbage storage box 1 rises, and when it is instructed to descend, SoL 2 is energized and the garbage storage box 1 is lowered.

According to the present invention, the condition for energizing SoL1 is that relay CR2, which will be described later, is energized. That is, body switch 20
and SoL1 is the second normally open contact of relay CR2.
Cr22 is connected.

In addition, a dump switch 21 is connected to the exhaust circuit A side, and when it instructs to descend, SoL3 is energized and the tailgate 3 is lowered.During the descent, SoL10 is energized and tightened via switch NO7. The device 15 is held in the opening direction and the tailgate 3
When the descent is completed, switch No. 7 is switched,
The SoL 9 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 the switch NO5, and if it is engaged, the 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 disengaged, the SoL4 is energized via the switch NO5 and the tailgate 3 is raised; if it is engaged, the SoL10 is energized. The tightening device 15 is released, and then the SoL 4 is energized and the tailgate 3 is raised.

The switch No. of the tightening device 15 is on the loading circuit B side.
6 is connected and loading is instructed, the emergency stop PB5, the push panel 8 retreat PB4, and the push panel 8 advance PB, provided that the tightening device 15 is engaged.
3. Current flows through each button of the reverse rotation PB2 of the rotating panel 6 to the buttons of the automatic loading PB1. Each of these buttons
As is clear from Fig. 1, PB1 to PB5 are attached to the operation panel 22 at the rear of the tailgate 3.
This makes it easier to work at the rear. When button PB1 is turned on, rotary solenoid R/S is energized via relay CR, and the rotation speed of the vehicle's driving engine (not shown) is increased. This engine drives a hydraulic pump P (Figure 4). Furthermore, current flows to the switches NO1 to NO4 via relay CR, starting a series of loading operations. When the current flows, the SoL7 is energized via the switches NO1 and NO4, and the rotating panel 6 starts rotating in the clockwise direction.
Switch No. 3 comes off on the way, but switch No.
Since SoL7 is energized bypassing SoL4, rotation continues. Switch No. 1 comes off after switch No. 3, and when it comes off, switch No. 2,
SOL5 is energized via NO1 and pushed panel 8
begins to retreat. Switch No. 4 at the start of backing up
is removed, and the retraction of the push-in panel 8 stops when switch NO2 is turned on at the retraction limit position. When the switch NO3 is turned on, the rotation of the rotary panel 6 is stopped as the SoL7 is deenergized, and when this is turned on, the SoL6 is energized via the switch NO4, 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 substantially the same configuration as those already proposed.

According to the present invention, the selection switch
A scraping operation switch PB6 is connected to the discharge circuit A side contact of SWM, and this switch PB6 is connected between the automatic loading button PB1 in the loading circuit B and the relay CR. This operation switch PB6 is the first
As is clear from the figure, it is provided in the driver's seat 23. Further, a relay CR2 is connected to the contacts of the scraping operation switch PB6, and this relay CR2 is configured to be self-held via its own first normally open contact Cr21 that bypasses the scraping operation switch PB6.

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

In Fig. 6, turn the selection switch Swm to the discharge side and the dump switch 21 to the rise side, and the tailgate 3
is dumped (Fig. 2), the driver confirms this and turns on the operation switch PB6. Then, current flows through relay CR in loading circuit B, and a series of loading operations as described above begin. 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). Here, when the operating switch PB6 is turned on, the relay CR2 is energized, the first normally open contact Cr21 is closed, and the relay CR2 is self-held, and at the same time, the second normally open contact Cr22 in the circuit that energizes the SoL1 is closed.
Next, when you instruct the body switch 20 to raise,
The SoL1 is energized via the closed second normally open contact Cr22, and the garbage storage box 1 is dumped (FIG. 3).

According to the present invention, the operation switch PB
Unless 6 is turned on, the garbage storage box 1 will not be dumped even if the body switch 20 is used to instruct to raise it. Therefore, the garbage storage box 1 will not be dumped with garbage remaining inside the tailgate 3, and the inside of the tailgate 3 will always be empty in the state shown in FIG. The center of gravity does not move backwards unnecessarily, and the vehicle can be reliably prevented from overturning.

(Effects of the invention) According to the invention, the garbage storage box is configured not to be dumped until after the garbage remaining in the tailgate has been scraped out. can be reliably prevented.

[Brief explanation of drawings]

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 , 20... Body switch, 21... Dump switch, CR2... Relay, Cr21... First normally open contact, Cr22... Second normally open contact, PB6... Scraping operation switch.

Claims (1)

[Scope of utility model registration request] A tailgate with a built-in garbage loading device is provided at the rear of the garbage storage box, and after the tailgate is dumped rearward, the front end of the garbage storage box is dumped upward, thereby removing the garbage inside the garbage storage box. A discharge operation control device for a garbage collection vehicle configured to allow garbage to slide backward and be discharged to the outside, includes a scraping operation switch that can instruct the operation of the garbage loading device when discharging garbage, and when the switch is turned on. a self-maintaining relay via its first normally open contact;
A garbage collection vehicle characterized in that a normally open contact is incorporated into a circuit for instructing dumping of the garbage storage box, so that the garbage storage box is not dumped unless the garbage loading device is operated by the scraping operation switch. Emission actuation control device.