JPS6124281B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for safely opening and closing a garbage processing frame that serves as a rear gate of a garbage storage box in a garbage collection vehicle.

A garbage storage box as a garbage collection vehicle, and a pushing plate hydraulically driven to open and close the rear opening of the garbage storage vehicle and to appropriately push and load the thrown garbage into the storage box.
Garbage collection vehicles are commonly used in combination with a garbage processing frame equipped with a pushing device consisting of a rotary or oscillating scraping plate that cooperates with the garbage processing frame.

In this type of garbage collection vehicle, the hydraulic cylinder used as the drive source for operating the pushing plate of the pushing device has a stroke that exceeds the operating range of a normal pushing plate,
By fixing the pushing plate inside the processing frame and operating it, it is configured to also serve as a driving source for opening and closing the processing frame when discharging garbage from the storage box.

In conventional garbage collection vehicles, the fixed position of the pushing plate when the processing frame is opened is set at the forward limit point, that is, the point at which the operation of pushing the garbage into the storage box is completed, so that there is no possibility that garbage will be inside the storage box. In a full state, the pushing plate is often unable to reach its forward limit, and if the processing frame is opened at this point, it will act as if the fully loaded garbage is a stopper, causing especially debris to get stuck. In this case, the opening of the processing frame is started using the biting part as a stopper, and the processing frame operates beyond the operating limit position.
Alternatively, when the bite is removed while the processing frame is being opened, the pushing plate suddenly becomes unloaded and moves impulsively, and the powerful impact generated by the following movement of the processing frame spreads to various parts, It can cause damage to the vehicle body and various equipment, and is also extremely dangerous to nearby workers.

The present invention has been invented in view of the above-mentioned points, and the processing frame is opened with respect to the garbage storage box in such a way that the pushing plate is fixed at the most retracted position, and the position is electrically confirmed and the processing frame is opened. We would like to provide an appropriate device that improves the safety of garbage collection vehicles by ensuring that the garbage storage box and processing frame can be opened, and in the normal closed state, securing the garbage storage box and processing frame with a manual lashing device. That is.

Embodiments of the present invention will be described below with reference to the drawings. 1 is a chassis of a garbage collection vehicle; 2 is a garbage storage box mounted on the chassis; 3 is a garbage pushing device 4 that opens and closes the rear opening of the storage box 2, and also loads garbage and pushes it into the storage box. This is a garbage disposal frame with a interior.

The storage box 2 is pivotally connected to the chassis 1 by a pin 5 at its rear end base, and is appropriately dumped by a hydraulic cylinder 6. The top of the processing frame 3 is pivotally attached to the upper part of the opening of the storage box 2 with a pin 7, so that it can be opened and closed in a flip-up manner. The pushing device 4 consists of a hydraulic cylinder 8, a pushing plate 9, a rotary plate 10, and two hydraulic motors M for driving the rotating plates installed on both sides of the processing frame, and the tip of the rod 12 of the hydraulic cylinder 8 is an extension of the base of the pushing plate. The hydraulic cylinder 8 is pivotally connected to an arm 11, and the base end of the cylinder is pivotally connected to a holder 13 projecting above the pin 7. In addition to the normal stroke required for swinging the push plate 9, this hydraulic cylinder 8 can also move the processing frame. 3
with the necessary stroke to open it.

Reference numeral 14 denotes a stopper with which the extension arm 11 of the push plate 9 engages, and is fixed in the processing frame 3 with a slight margin left at the backward turn point when the push plate 9 normally moves when loading garbage. It is placed facing the direction.

15 is a securing device for the garbage storage box 2 and the processing frame 3;
A step part 17 formed at the middle part of a rod-shaped locking body 16 whose base end is pivotally connected to the side surface of the storage box is fitted into a locking groove 19 formed in a receiving plate 18 fixed to the side surface of the processing frame and locked therein. be.

In addition, 20 indicates a stopper of the locking body 16, and the locking body 1
6 to the storage box side or processing frame side as appropriate.

Next, the hydraulic circuit will be explained.

P is a hydraulic pump, T is an oil reservoir, V1 is a switching valve for controlling the dump hydraulic cylinder 6, V2
is a switching valve for controlling the hydraulic cylinder 8 for operating the push plate 9 and the processing frame 3; V3 is a switching valve for controlling the hydraulic motor M for rotationally driving the rotary plate 10; these switching valves V1, V2, and V3 are hydraulically operated. It is arranged in series with the discharge pipe of the pump P, and each switching valve V1, V
2. V3 has a solenoid for valve spool operation
It has SOLc, SOLd, SOLf, SOLe, SOLg, and SOLh.

Next, the electric circuit will be explained.

B is the power supply such as battery, BZ is the buzzer, SW1
SW2 is a selection switch for selecting whether to continue the garbage loading operation once or continuously.
SW3 is a switch for starting loading work, SW4 is a switch for stopping loading work, SW5 is a switch for buzzer, SW6 is a reverse switch for rotating plate 10, SW
7 is a switch for forward operation of the push plate 9, SW8 is a switch for backward operation of the push plate 9, and SW9 is a switch for operating the processing frame 3.
The opening/closing operation switch SW10 is a damping changeover switch for the storage box 2.

Next, LS1 is an electric contact that operates at the forward limit point of the pushing plate 9, LS2 is an electric contact that operates at the backward limit point of the pushing plate 9, and LS3 continues while the rotary plate 10 rotates forward by a predetermined angle from its stop position. LS4 is an electrical contact that operates when the processing frame 3 enters the opening operation and rotates through a predetermined angle.

The operation in the above configuration will be explained.

In Fig. 5, the selector switch SW1 is placed in the upper position, and if the loading operation is to be performed in one cycle, the selection switch SW2 is placed in the lower position, garbage is put into the processing frame 3, and the starting switch SW3 is turned on.
When turned on, current flows to the solenoid SOLg, switches the switching valve V3 to the left, the hydraulic motor M operates, and the rotary plate 10 starts rotating. When the rotary plate 10 rotates a predetermined angle, the electric contact LS3 switches, current flows to the solenoid SOLf, switches the switching valve V2 to the left position, the hydraulic cylinder 8 operates to contract, and the push plate 9 starts to move backward. At the same time, electrical contacts
LS1 is switched. When this pushing plate 9 reaches the retraction limit point and switches electric contact LS2, solenoid SOLf
The current flowing through the switch valve V2 is cut off, the switching valve V2 is brought to the neutral position, and the push plate 9 is stopped.

The rotary plate 10 continues to rotate and scoops up the garbage thrown into the processing frame 3, and after exactly one revolution, it reaches the original stop position, switches the electric contact LS3, cuts off the current flowing to the solenoid SOLg, and closes the control valve V3.
When the hydraulic motor M is brought to a neutral position and the rotation of the hydraulic motor M is stopped, the rotation of the rotary plate 10 is stopped. Solenoid at the same time
A current flows through the SOLe and the pushing plate 9 starts moving forward, pushing the garbage on the rotary plate 10 into the collection box 2. Then, the push plate 9 reaches the forward limit point and the electrical contact is made here.
When LS1 is switched, the power to the solenoid SOLe is cut off, the control valve V2 returns to the neutral position, the push plate 9 stops, and one cycle of the loading operation is completed.

On the other hand, in the case of continuous cycle operation of the loading operation, the aforementioned one cycle operation is continued by placing the selection switch SW2 in the upper position. To stop this operation, turn off the stop switch SW4.

Once the garbage has been loaded into the storage box 2 as described above, it is driven to a designated treatment plant and discharged there.

For this discharge, first set the changeover switch SW1 to the lower position and then set the switch SW9 to the upper position, but unless the electric contact LS2b is switched downward, the buzzer BZ will only sound and the push plate 9 will not operate. .

That is, only when the push plate 9 is at the retraction limit position and the electric contact LS2 is switched, the solenoid SOLf
Current flows to the switch valve V2, and the switching valve V2 is switched to the left position, causing the hydraulic cylinder 8 to perform a contracting operation. continue,
The extension arm 11 of the push-in plate 9 comes into contact with the stopper 14 and its backward movement is stopped, and the processing frame 3 starts its opening movement around its pivot pin 7. After this, when the changeover switch SW10 is switched to the upper position, the processing frame 3
Since electric contact LS4 is being switched in the middle of opening, current flows to solenoid SOLc and switching valve V1
is switched to the right position, and the hydraulic cylinder 6 is extended to dump the storage box 2 and discharge the garbage.

Note that, as a matter of course, the securing device 15 for the storage box 2 and the processing frame 3 is manually released prior to the opening/closing movement of the processing frame 3.

As explained above, the present invention pivots a processing frame equipped with a pushing device to the rear opening of a garbage storage box of a garbage collection vehicle so as to be openable and closable, and a hydraulic cylinder for operating the pushing plate of the pushing device is used to open and close the processing frame. In the case where the push plate is used for both purposes, the processing frame is opened and closed while the push plate is fixed at the retreat limit point away from the garbage in the storage box, so the fixing position of the push plate depends on the amount of garbage in the storage box. It improves work safety because it does not involve operation in an unstable state due to unrelated determination, and it also has higher reliability because it does not cause shocks to the vehicle itself and does not cause breakdowns. has.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic rear side view of the garbage collection vehicle, Fig. 2 is a side view of the lashing device, Fig. 3 is a plan view thereof, Fig. 4 is a hydraulic circuit diagram, FIG. 5 is an electrical circuit diagram, and FIG. 6 is a diagram showing the arrangement of main electrical contacts. 1... Chassis, 2... Garbage storage box, 3... Garbage processing frame, 4... Garbage pushing device, 5... Pin, 6
... Hydraulic cylinder, 7 ... Pin, 8 ... Hydraulic cylinder, 9 ... Push plate, 10 ... Rotating plate, 11
...extension arm, 12...rod, 13...stand, 1
4...stopper, 15...lashing device, 16...
Locking body, 17... Step portion, 18... Reception plate, 19...
Locking groove, 20... Stopper, P... Hydraulic pump, T...
...Oil reservoir, V1, V2, V3...Switching valve, M...Hydraulic motor, SOLc, SOLd, SOLf,
SOLe, SOLg, SOLh...Solenoid, B...Battery, BZ...Buzzer, SW1 to SW10...Switch, LS1 to LS4...Electric contact.

Claims (1)

[Claims] 1. A garbage processing frame equipped with a garbage pushing device is rotatably attached to the rear upper part of the garbage storage box, and the processing frame can be opened and closed with respect to the storage box using the pushing plate operating cylinder of the pushing device. The garbage storage vehicle is provided with an electric contact for detecting the retraction limit point of the pushing plate, a switch for opening/closing the garbage processing frame, and a switching valve for controlling the pushing plate operating cylinder, and when discharging the garbage, the switch for opening/closing is operated. Only when the push plate is switched to the open position and the push plate is at the backward limit position and the electric contact is switched, the control switching valve is switched and the push plate actuating cylinder is operated, and the push plate comes into contact with the stopper to perform processing. A safety device for opening and closing a garbage processing frame in a garbage collection vehicle, characterized in that the frame is configured to open.