JPH0699003B2 - Control device for garbage truck - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control device for a refuse collection vehicle.

(Prior Art) Conventionally, the dust that is thrown in through the dust throwing port that is opened in the ceiling opening of the dust storage box is compressed by the compression plate between the tailgate and the dust, and is stored. Collection trucks are known (see, for example, Japanese Utility Model Publication No. 52-47208 or Japanese Patent Publication No. 53-93518).

In such a refuse collection vehicle, the compression plate is normally in the forward storage position, and after retracting so as to compress the dust thrown in through the dust input port, it is returned to the forward storage position again to perform the compression loading cycle. Is supposed to end.

Therefore, if the dust that has been compressed in the dust storage box is unraveled by vibration or a control stop when traveling to the next collection site and moves to just below the dust input port, when starting the loading operation, the dust should be removed. The dust that had moved just below the inlet had to be compressed again by the backward movement of the compression plate.

That is, even if the garbage truck arrives at a new collection place, the reciprocating cycle of the compression plate becomes a waiting time, and there is a drawback that the loading operation cannot be performed immediately.

(Problems to be Solved by the Present Invention) The present invention has been made in view of the above points, and provides a control device for a refuse collecting vehicle with a minimum waiting time.

(Technical Means for Solving Problems) The present invention provides an automatic loading switch and a semi-automatic loading switch, and a control circuit that sequentially controls operation of the canopy and the compression plate by selecting each switch, When the semi-automatic loading switch is operated, the loading cycle is stopped by retracting the compression plate.

(Function) When operating the automatic loading switch, first throw in dust, then
The canopy in the open state is closed, the compression plate retracts and moves forward when the dust is compressed to a predetermined pressure, and when reaching the limit position, the canopy is opened and the loading cycle ends. Then, by sequentially repeating this loading cycle, the dust is compressed and stored in the dust storage box.

On the other hand, when the semi-automatic loading switch is operated, the operation is stopped during the loading cycle, that is, when the compression plate is being retracted and the dust is compressed to a predetermined pressure, and the dust is kept in a compressed state.

(Examples) Examples of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a refuse collection vehicle, in which a garbage storage box 3 is mounted on a chassis 2, and a refuse input port 4 is provided at the front part of the ceiling, and a dust discharge port 5 is provided at the rear end thereof.

On the other hand, a pair of guide rails 6 is fixedly installed on the ceiling wall of the dust container 3, and a roller 7a pivotally attached to the rear end of the canopy 7 is fitted to the guide rails 6. Also, the canopy 7
An arm 8 is pivotally mounted between the front end and the side wall of the dust container 3, and when the arm 8 is swung by the expansion and contraction operation of the canopy cylinder 9, the canopy 7 can open and close the dust inlet 4.

By the way, in the dust storage box 3, a compression plate 10 that extends fully in the width direction is stored, and the compression plate 10 is provided with a compression cylinder 11 disposed in the dust storage box 3 and the front surface of the compression plate 10.
It is possible to slide in the front-back direction by the expansion and contraction operation.

Further, a tail gate 12 is pivotally attached to the dust discharge port 5, and the tail gate 12 is not shown in detail, but of an opening / closing cylinder 13 (see FIG. 2) arranged on the rear surface of the dust storage box 3. It is opened and closed by the expansion and contraction operation.

Next, the hydraulic circuit will be described with reference to FIG.

P is a hydraulic pump, T is an oil reservoir, V1 is an electromagnetic control valve that controls the compression cylinder 11, V2 is an electromagnetic control valve that controls the opening / closing cylinder 13, and V3 is an electromagnetic control valve that controls the canopy cylinder 9. The control valves V1, V2, V3 are arranged in parallel to the discharge line of the hydraulic pump P. In addition, each solenoid control valve V1, V2, V3 has a spool operating solenoid SOLa, SOLb,
It has SOLc, SOLd, SOLe and SOLf.

PS is a pressure switch, which is arranged in the extension side circuit of the compression cylinder 11.

Next, the electric circuit will be described with reference to FIG.

B is the power source for the battery, SW1 is the power switch, SW2, S
W7 is a stop switch, SW3 is an automatic loading switch that automatically performs one loading cycle, SW4 is an open / close switch that opens and closes the canopy 7, SW5 is a discharge switch that slides the compression plate 10 back and forth, and SW6 is a tailgate 12 Open / close switch for opening and closing, S
W8 is a semi-automatic loading switch that carries out 1/2 cycle of loading work.

LS1 is an electrical contact that the compression plate 10 operates in the forward retracted position, LS2
Is an electrical contact that operates when the canopy 7 is open, and LS6 is an electrical contact that operates when the canopy 7 is closed.

CR1 to CR11 are relays and have contacts cr1 to cr11. In the above switch group, the power switch SW1 and the stop switch SW7 are located inside the driver's seat, and the stop switch SW
2. The automatic loading switch SW3, the opening / closing switches SW4, SW6, the discharging switch SW5, and the semi-automatic loading switch SW8 are arranged on the dust container box 3 side, and PS is a pressure switch.

Next, the operation of the present invention will be described. In the normal traveling state, the compression plate 10 is at the front position, the canopy 7 is at the open position, the electrical contact LS1 is at the lower position, and the electrical contact LS2 is at the open position.

Here, if dust is thrown in from the dust throwing port 4 as appropriate and then the automatic loading switch SW3 is pressed, the relay CR-5 is excited and the relay CR5 is held by itself via its a-contact cr5 and b-contact cr6. Then, b contact cr6, a contact cr5, electrical contact LS
Energize relay CR3 through contact point cr8 and contact point cr3
Close.

Therefore, by exciting the solenoid SOLe, the electromagnetic control valve V3 is switched to the left position to extend the canopy cylinder 9. By this extension operation of the canopy cylinder 9, the arm 8 swings in the counterclockwise direction, and the canopy 7 closes the dust feeding port 4. At the same time, the electrical contact LS2 returns to the closed position as the arm 8 swings counterclockwise.

When the canopy 7 completely closes the dust inlet 4, the electrical contact LS
Since 3 is switched to the upper position, the excitation to relay CR3 is cut off, and electromagnetic control valve V3 returns to the center positive position. Then
Relay CR7 via b-contact cr6, a-contact cr5, and electrical contact LS3
Is energized to switch the a-contact cr7 to excite the relay CR8, and at the same time, the relay CR8 is self-held via the a-contact cr8.

Excitation of relay CR8 energizes relay CR1 via a-contact cr5 and a-contact cr8. As a result, current flows to solenoid SOLa via a-contact cr1 and switches solenoid control valve V1 to the left position to compress cylinder. Extend 11 Therefore, the compression plate 10 starts to retreat, and the dust thrown through the dust throwing port 4 is compressed between itself and the tailgate 12.

Here, the electrical contact LS1 is switched to the upper position as the compression plate 10 slides backward.

Then, when the dust is compressed to a predetermined pressure due to the retreat of the compression plate 10, the compression switch PS is switched to the upper position to excite the relay CR6.

By exciting this relay CR6, electrical contact LS1, a contact cr
6. Energize relay CR2 via b-contact cr9. On this occasion,
The relay CR5 is still self-held through the a contact cr5, the electrical contact LS2, and the b contact cr11.
6 is also self-held via a-contact cr5, a-contact cr6, a-contact cr5, and b-contact cr10.

When the relay CR2 is energized, a current flows to the solenoid SOLb via its a-contact cr2, and the solenoid control valve V1 is switched to the right position, so that the compression cylinder 11 is contracted and the compression plate 10 is pressed.
To move forward.

With this advance, the pressure switch PS is opened, but CR6
The forward movement of the compression plate 10 is continued by the self-holding of the compression plate 10.

When the compression plate 10 reaches the forward limit position, the electric contact LS1 is switched to the lower position, and the relay CR9 is excited via the a contact cr6, so that the relay CR4 is excited via the a contact cr6 and the a contact cr9.

Therefore, the solenoid SOLf is energized through the a-contact cr4, the electromagnetic control valve V3 is switched to the right position, and the canopy cylinder 9 is contracted. As a result, the canopy 7 opens the dust insertion port 4.

Then, when the canopy 7 completely opens the dust input port 4, the electric contact LS2 is opened, so that the self-holding of the relay CR5 is released, and the dust loading cycle ends here.

In this way, the dust thrown from the dust throwing port 4 is
Closing the canopy 7 in sequence, retracting the compression plate 10, advancing the compression plate 10,
The canopy 7 is opened and the dust is compressed and stored in the dust storage box 3.

On the other hand, when the amount of dust is small and it is not necessary to repeatedly move the compression plate forward and backward, the semi-automatic loading switch SW8 may be pressed.

In this case, the relay CR10 is energized, and the relay CR10 is self-held via the b contact cr11 and the a contact cr10. Then,
It flows to the relay CR5 through the a-contact cr10, and holds the relay CR5 by itself in the same manner as described above.
Perform a retreat of 0.

Then, when the compression plate 10 sufficiently compresses the dust, the pressure switch is closed. As a result, the contact a5, the pressure switch PS, a
The relay CR11 is excited via the contacts cr5 and a-contact cr10. By energizing the relay CR11, the self-holding of the relay CR10 is released, and at the same time, the energization of the relay CR11 is cut off, and the self-holding of the relay CR5 is released.As a result, the compression plate 10 is retracted. To stop.

After traveling to the next dust collection site in this state, if the automatic loading switch SW3 is pressed, the electrical contact LS1 is in the upper position, the electrical contact LS2 is in the closed position, and the electrical contact LS3 is in the upper position. Relay CR5 is self-holding and starts with the excitation of relay CR6. That is, after the compression plate 10 is moved forward and the canopy 7 is opened in sequence, the self-holding of the relay CR5 is released and the standby state for the next dust throwing operation is reached. At this time, since the dust is held in the compressed state in the rear part of the dust storage box 3, the compression plate 10 is hardly distorted even when the compression plate 10 is moved forward, and the space immediately below the dust input port 4 has a space for the input dust. .

In this way, the refuse that has been sequentially injected from the refuse introduction port 4 is stored in the refuse storage box 3 while being compressed by the compression plate 10, so that when the dust storage box 3 becomes full, it moves to the refuse discharge area. After that, if the open / close switch SW6 is operated to the upper position, the solenoid SOLd is energized, the electromagnetic control valve V2 is switched to the right position, and the open / close cylinder 13 is contracted to operate the tailgate.
12 is released. After that, if the operation switch SW5 is turned to the upper position, it flows to the relay CR1, the electromagnetic control valve V1 is switched to the left position as described above, the compression plate 10 is retracted, and the dust in the dust storage box 3 is cleaned. It can be discharged from the discharge port 5.

Further, to return to the traveling position, the operation switch SW5 may be put in the lower position to move the compression plate 10 forward, and then the opening / closing switch SW6 may be switched to the lower position to close the tailgate 12.

In the present embodiment, the loading switch is provided separately for the automatic loading switch and the semi-automatic loading switch, but it may be configured by a changeover switch or the like, the selection of which is arbitrary, and the dust loading cycle is You may make it start from the opening operation of a canopy.

(Effect) As described above, in the present invention, if the semi-automatic loading switch is selected according to the amount of dust input at the collection site, the compression plate can be stopped at the retracted position and held in the dust compression state,
At the time of the next dust loading operation, it is not necessary to retreat the compression plate at the forward position to move backward the dust scattered near the loading port as in the fully automatic loading, and the waiting time is reduced as much as possible. Dust can be loaded efficiently.

[Brief description of drawings]

The drawings illustrate an embodiment of the present invention. FIG. 1 is a side view of a dust collection vehicle with a part thereof omitted, FIG. 2 is a hydraulic circuit diagram, FIG. 3 is an electric circuit, and FIG. It is a layout of a contact and each switch. 3 ... Dust storage box, 4 ... Dust input port, 7 ... Canopy, 9
... canopy cylinder, 10 ... compression plate, 11 ... compression cylinder, V1, V2, V3 ... electromagnetic control valve, CR1 to CR11 ... relay, SW3 ... automatic loading switch, SW8 ... semi-automatic loading switch .

Claims (1)

[Claims] 1. A tailgate is pivotally attached to a dust discharge port of a dust storage box mounted on a vehicle frame so as to be openable and closable, and a canopy is installed at the dust input port so that the dust storage box can be opened and closed. Operation of the canopy and compression plate in a dust collection vehicle in which a compression plate is slidably arranged in the front-rear direction, and the dust injected from the dust injection port is compressed and stored between the compression plate and the tailgate. It is equipped with an automatic loading switch and a semi-automatic loading switch to control, and a solenoid for solenoid control valve spool operation that controls expansion and contraction of the canopy cylinder and compression cylinder by operating the automatic loading switch or the semi-automatic loading switch. A control circuit for energizing is provided, and by operating the automatic loading switch, the dust loading system for opening and closing the canopy and retracting and advancing the compression plate from the dust loading standby state compresses and stores the dust. Le sequentially continuously actuates the, also the control apparatus of the semi-automatic loading refuse collection vehicles the compression plate dust loading cycles the switch operation is characterized in that so as to stop at garbage compression retracted.