JPH11255302A - Refuse collecting vehicle and control device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a refuse discharge plate from unnecessarily moving back, when the refuse discharge plate is automatically moved back in accordance with lowering of a tail gate after refuse discharging, even a worker repeats switch operation for lowering the tail gate. SOLUTION: If a first changeover switch SW is turned to the tail gate lowering side, after refuse is discharged a second solenoid SOL2 is supplied with a current so that moving back of a refuse discharge plate and the actuation of timer TM start. After a predetermined time passes, if a time limit contact 20 of timer TM is closed and a self holding relay KR2 is held on the set side, the tail gate beings lowering and the refuse discharge plate stops moving back. The refuse discharge plate does not move back again, since the self holding relay KR2 is held at the set position until a second changeover switch SW2 starts an operation for moving the refuse discharge plate forward, even the first changeover switch SW is repeatedly operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a refuse collection vehicle, and more particularly to a control device for a refuse collection vehicle. The present invention relates to a control device of a refuse collection vehicle improved so as not to perform the operation.

[0002]

2. Description of the Related Art Conventionally, a refuse collection vehicle has been used to collect combustible refuse and incombustible refuse. An example of the structure of this refuse collection vehicle will be described with reference to FIG. Inside the garbage storage box 2 mounted on the vehicle, there is provided a discharge plate 4 which is movable in the longitudinal direction of the vehicle body by the expansion and contraction operation of a telescopic type discharge cylinder 3. The box 2 is discharged from the rear opening. A push plate 6 for pushing dust to be loaded into the dust storage box 2 is provided with an upper link 7 and a lower link inside a tail gate 5 (dust input box) connected to the rear of the dust storage box 2. It is supported by the link 8 so as to be able to move up and down, and can be moved up and down by the expansion and contraction operation of the pushing cylinder 9. Further, at a pivot 10 provided at the lower end of the pushing plate 6, a scraping plate 11 for scraping dust to be loaded into the dust container box 2 side is rotatable around the pivot 10. It is pivotally supported and is rotatable in the vehicle longitudinal direction by the expansion and contraction operation of the rake cylinder 12.

[0003] Thereby, the sump 13 of the tailgate 5 is provided.
When the pushing plate 6 is raised while the scraping plate 11 is rotated to scrape the dust put into the inside, the dust 15 can be compressed by the scraping plate 11, the deflector 14 and the discharge plate 4. And the garbage 1 loaded in the garbage storage box 2
By gradually retreating the discharge plate 4 toward the front of the vehicle body in accordance with the compression reaction force of 5, the large amount of dust 15 can be stored in the dust storage box 2 while being efficiently compressed.

On the other hand, when discharging the dust 15 in the dust container 2, as shown in FIG. 3, the lifting cylinder 16 is extended, and the tail gate 5 is turned around the support shaft 17 to rise. Then, the rear opening 2a is opened. Next, the discharge plate 4 is moved forward by extending the discharge cylinder 3, and the dust in the dust storage box 2 is discharged from the rear opening 2a.
At this time, by projecting the tip 4a of the discharge plate 4 from the rear opening 2a, the dust in the dust storage box 2 can be completely discharged.

If the tailgate 5 is simply lowered after the dust is discharged as described above, the lower end of the tailgate 5 collides with the tip 4a of the discharge plate 4. Therefore, the advancing and retreating of the discharge plate 4 and the tail gate 5
The control device for controlling the ascending / descending movement is configured as shown in FIG.

That is, when the changeover switch SW1 for raising and lowering the tailgate 5 is switched to the tailgate lowering side, the first relay contact 18 is open, so that the control valve of the raising and lowering cylinder 16 is electromagnetically operated to the lowering side. No electricity is supplied to one solenoid SOL1. As a result, the tailgate 5 does not immediately descend. However, since the second relay contact 19 is closed, the second solenoid SOL2 that electromagnetically operates the control valve of the discharge cylinder 3 to the reverse side is energized,
The discharge plate 4 starts retreating.

On the other hand, the timer TM includes a changeover switch SW1
And the operation is started simultaneously with the above operation. When the predetermined time has elapsed, the time limit contact 20 is closed while the timer TM is energized. Then, the relay CR1 is excited, and the first relay contact 18 is closed and the second relay contact 19 is opened, so that the retreat of the discharge plate 4 is stopped at the same time when the tail gate 5 is lowered. As a result, not only can the tail gate 5 be lowered so as not to collide with the discharge plate 4, and the discharge plate 4 can be held at an appropriate position by appropriately setting the operation time of the timer TM.
As shown in (1), the loaded dust 15 can be appropriately compressed.

[0008]

According to the above-described control device for a refuse collection vehicle, not only the refuse in the refuse storage box 2 can be reliably discharged, but also the discharge plate 4 before the tailgate 5 descends. Automatically retracts, it is possible to prevent the collision between the tail gate 5 and the discharge plate 4 from being prevented.

[0009] However, during the dust discharging operation, there is a case where the descent of the tailgate is restarted after the descent of the tailgate is temporarily stopped halfway. At this time, according to the above-described control device of the related art, the operator operates the changeover switch SW1.
Every time is switched to the descending side, the discharge plate 4 retreats by a predetermined distance. Then, the scraping plate 11 and the deflector 14
As shown in FIG. 2, the loaded dust 15 cannot be appropriately compressed because the distance in the front-rear direction between the sheet and the discharge plate 4 becomes large.

When a telescopic type hydraulic cylinder is used, it is not possible to detect the retreat position of the discharge plate as disclosed in JP-A-7-206102 and JP-A-4-79802. Have difficulty.

Accordingly, an object of the present invention is to solve the above-described problems of the prior art, and to allow the operator to automatically retract the discharge plate as the tailgate descends after discharging the dust. It is an object of the present invention to provide a control device for a refuse collection vehicle in which a discharge plate does not retreat more than necessary even if a switch operation for lowering the refuse is repeated.

[0012]

According to a first aspect of the present invention, there is provided a refuse collection vehicle including a refuse input box capable of opening and closing an opening of a refuse storage box mounted on the refuse collection vehicle. Opening / closing means for opening and closing the opening between a position where the opening is most opened and a position where the opening is closed, and a discharge plate whose tip part can project from the opening, a position where the tip part projects most from the opening. Reciprocating means for reciprocating between a position and a position retracted into the refuse storage box, and operation start and stop of the open / close means from the position where the trash input box opens the opening to the side closing the opening. Instruction means for instructing, and when the instruction means instructs the start of operation of the closing means, the retreat means is operated for a predetermined time prior to the start of operation of the closing means, and the discharge plate projects most from the opening. Rank It causes a predetermined distance back from,
After the predetermined time has elapsed, control means for maintaining a holding state in which the operation of the opening / closing means is restarted but the operation of the advance / retreat means is prevented even if the instruction means again instructs the operation start of the closing means. Is provided.

[0013] That is, in the refuse collection vehicle according to the first aspect of the present invention, when the trash insertion box is displaced from the position where the opening of the refuse storage box is most opened to the side that closes the opening, the closing means is provided. Activate the advance / retreat means prior to activation,
Since the discharge plate is retracted by a predetermined distance from the position most protruding from the opening, the opening of the dust storage box can be closed by the dust input box without causing the dust input box to collide with the discharge plate. At this time, even if the operator operates the indicating means to interrupt the operation of the closing means and then restarts the operation of the closing means, the control means prevents the operation of the advancing / retreating means. It is possible to prevent retreat in the storage box.

According to a fifth aspect of the present invention, there is provided a control device for a refuse collection vehicle which opens and closes a refuse storage box mounted on the refuse collection vehicle. A cylinder, and a control device that controls the operation of a discharge cylinder that advances and retreats a discharge plate whose tip portion can protrude from the opening in the dust container, and a control valve that controls expansion and contraction operation of the open / close cylinder. A first solenoid for electromagnetically operating the dust input box to close the opening and a control valve for controlling the expansion and contraction operation of the discharge cylinder, and a second solenoid for electromagnetically operating the discharge plate to the side where the discharge plate is retracted into the dust storage box. A second solenoid electromagnetically operated to a side where the solenoid and the discharge plate advance toward the opening;
When the dust input box is switched to the side that closes the opening, the second solenoid is energized, a first changeover switch that switches the opening and closing of the dust input box, and the discharge plate is located in the dust storage box. A second changeover switch that energizes the second solenoid directly when switched to the retreating side, and energizes the third solenoid when the discharge plate is switched to the side that advances toward the opening; The first
A timer which starts operation when the second solenoid is energized via a changeover switch and closes a time limit contact after a lapse of a predetermined time; and switches to a set position when energized by closing the time limit contact, thereby setting a power source side. Closing a first relay contact interposed between the first switch and the first solenoid, opening a second relay contact interposed between the first switch and the second solenoid, A self-holding relay that is switched to a reset position when the third solenoid is energized by a switch to open the first relay contact and close the second relay contact;

That is, when the dust in the dust storage box is discharged by the control device of the dust collection vehicle of the present invention, first, the dust input box is displaced to the open side to open the opening of the dust storage box, and then the discharge is performed. The trash in the trash storage box is discharged by advancing the plate toward the opening. At this time, by moving the discharge plate forward until the distal end portion of the discharge plate protrudes from the opening, the dust in the dust storage box can be completely discharged.

After the dust discharging operation is completed, first, the discharging plate is retracted into the dust storing box until the distal end portion of the discharging plate enters the dust storing box to avoid collision between the dust input box and the discharging plate. There must be. Therefore, in the control device of the present invention, when the first changeover switch is operated to close the dust box, the second solenoid for retracting the discharge plate is energized. Then, the discharge plate starts to retreat,
The timer starts running. Then, when a predetermined time elapses after the timer starts operating, the time limit contact closes, and the self-holding relay is switched to the set position.

Accordingly, the first relay contact of the self-holding relay is closed and the first solenoid is energized, so that the opening / closing cylinder is operated in the direction to close the dust box. At the same time, the second relay contact of the self-holding relay is opened to cut off the power supply to the second solenoid, and the retraction of the discharge plate stops. However, since the discharge plate is retracted into the dust storage box ahead of the start of the closing operation of the dust input box by a predetermined time, the dust input box does not collide with the discharge plate. Further, in a state in which the dust input box is completely closed, the dust input box and the discharge plate are maintained at a predetermined interval without using the position detecting means. Thus, when the dust loading operation is started, the dust loaded in the dust input box and the discharge plate can be appropriately compressed, so that a large amount of dust can be efficiently loaded in the dust storage box. .

On the other hand, the self-holding relay holds the set position until the self-holding relay is reset by energizing the third solenoid by the switching operation of the second changeover switch. Thus, when closing the dust bin, the first changeover switch is operated for some reason to interrupt the closing operation of the dust bin, and then the first changeover switch is operated again to restart the dust bin closing operation. However, since the first solenoid is not energized from the first changeover switch, the discharge plate does not retreat again. Therefore, every time the first changeover switch is operated, it is possible to reliably avoid a situation where the discharge plate retreats and the dust loaded in the dust input box and the discharge plate cannot be appropriately compressed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a control device for a refuse collection vehicle according to the present invention will be described in detail with reference to FIGS. In the following description, the same parts as those described above are denoted by the same reference numerals.

A refuse collection vehicle to which the control device of the present embodiment is applied has the structure shown in FIGS. That is, inside the refuse storage box 2 mounted on the refuse collection vehicle 1, there is provided a discharge plate 4 that can move forward and backward in the vehicle body longitudinal direction by the expansion and contraction operation of the telescopic discharge cylinder 3. The loaded dust is discharged from the rear opening 2a of the dust storage box 2. In addition, a tailgate (garbage input box) connected to the rear of the garbage storage box 2
A push plate 6 for pushing garbage to be loaded into the garbage storage box 2 is supported by the upper link 7 and the lower link 8 so as to be able to move up and down, and is moved up and down by the expansion and contraction operation of the pushing cylinder 9. It is possible. Further, at a pivot 10 provided at the lower end of the pushing plate 6, a scraping plate 11 for scraping dust to be loaded into the dust container box 2 side is rotatable around the pivot 10. It is pivotally supported and is rotatable in the vehicle longitudinal direction by the expansion and contraction operation of the rake cylinder 12.

Thus, the sump 13 of the tailgate 5 is
When the pushing plate 6 is raised while the scraping plate 11 is rotated to scrape the dust put into the inside, the dust 15 can be compressed by the scraping plate 11, the deflector 14 and the discharge plate 4. And the garbage 1 loaded in the garbage storage box 2
By gradually retreating the discharge plate 4 toward the front of the vehicle body in accordance with the compression reaction force of 5, the large amount of dust 15 can be stored in the dust storage box 2 while being efficiently compressed.

On the other hand, when discharging the dust 15 in the dust storage box 2, as shown in FIG. 3, the elevating cylinder (opening / closing cylinder) 16 is extended, and the tail gate 5 is turned around the support shaft 17. And move it up to the rear opening 2
Release a. Subsequently, the discharge plate 4 is advanced toward the rear opening 2a by extending the discharge cylinder 3,
The dust in the dust storage box 2 is discharged from the rear opening 2a. At this time, the front end portion 4a of the discharge plate 4 is
By moving the discharge plate 4 forward until it projects from the dust container, the dust in the dust storage box 2 can be completely discharged.

If the tailgate 5 is simply lowered after the dust in the dust container 2 is discharged as described above, the lower end of the tailgate 5 and the tip 4a of the discharge plate 4 collide. Would. Therefore, in the present embodiment, a control device that controls the advance / retreat of the discharge plate 4 and the elevation of the tail gate 5 is configured as shown in FIG.

That is, in the control device 100 of the refuse collection vehicle of the present embodiment shown in FIG. 1, when the main switch MSW connected to the power supply E is closed, the work selection switch SSW is energized via the fuse Fu. . The work selection switch SSW is switched to the loading side when loading garbage and to the discharge side when discharging garbage from the garbage storage box.

The control device 100 according to the present embodiment has a first changeover switch S for operating the tailgate 5 to move up and down.
W1, a second changeover switch SW2 for moving the discharge plate 4 forward and backward, a first solenoid SOL1 for electromagnetically operating a hydraulic control valve (not shown) for controlling the elevating cylinder 16 to the side where the tailgate 5 is lowered, A second solenoid SOL2 that electromagnetically operates a hydraulic control valve (not shown) for controlling the discharge cylinder 3 so that the discharge plate 4 retreats into the dust container 2;
Further, a third solenoid SOL3 that is electromagnetically operated is provided on a side where the discharge plate 4 advances toward the rear opening 2a of the dust container 2. Further, interlock switches ILS1, ILS2, and ILS3 are interposed between the first changeover switch SW1 and the second solenoid SOL2 to prevent malfunction of each device in the discharge plate 4 and the tailgate 5. doing.

When the first changeover switch SW1 is operated to switch the tailgate 5 down, the second solenoid SOL2 is energized. On the other hand, when the switching operation is performed to move the tailgate 5 upward, a solenoid (not shown) that electromagnetically operates the control valve of the lifting cylinder 16 upward is energized.

The second changeover switch SW2 is connected to the discharge plate 4
When the switch is operated to advance to the rear opening 2a, the third solenoid is energized. On the other hand, when the discharge plate 4 is switched to the side where the discharge plate 4 is retracted into the refuse storage box 2, the second solenoid SOL2 is directly energized without passing through the second relay contact 22 described later.

When the first changeover switch SW1 is switched to the tail gate lowering side, the timer TM is energized. When a predetermined time has elapsed, the timer TM closes the time limit contact 20 and energizes the set-side coil of the self-holding relay KR2. Then, the self-holding relay K
R2 is switched to the set position and the first relay contact 21
Is closed, and the second relay contact 22 is held in an open state by itself. Note that the first relay contact 21 is
The second relay contact 22 is interposed between the changeover switch SW1 and the first solenoid SOL1, and the second relay contact 22 is interposed between the interlock switch ILS3 and the second solenoid SOL2.

On the other hand, the self-holding relay KR2 is switched to the reset side only when the second changeover switch SW2 is switched to the forward side of the discharge plate and the reset coil of the self-holding relay KR2 is energized. When the self-holding relay KR2 is switched to the reset side, the self-holding relay KR2 opens the first relay contact 21 and self-holds the second relay contact 22 in a closed state.

Next, the operation of the control device 100 of this embodiment will be described.

That is, when the garbage is discharged from the garbage storage box 2 by using the garbage collection vehicle control device 100 of the present embodiment, the tailgate 5 is raised and the garbage storage is performed as shown in FIG. After opening the rear opening 2a of the box 2, the discharge plate 4
Is advanced toward the rear opening 2a to discharge the dust in the dust storage box 2. At this time, the dust in the dust container 2 can be completely discharged by advancing the discharge plate 4 until the distal end portion 4a of the discharge plate 4 projects from the rear opening 2a.

After the dust discharging operation is completed, first, the discharging plate 4 is retracted into the dust storing box 2 until the distal end portion 4a of the discharging plate 4 enters the dust storing box 2, and the lower end portion of the tail gate 5 is removed. It is necessary to avoid collision between the discharge plate 4 and the tip portion 4a of the discharge plate 4. Therefore, the control device 1 of the present embodiment
00, the tailgate 5 is moved down to the first
When the changeover switch SW1 is operated, the second solenoid SOL2 for retracting the discharge plate 4 is energized. Then, the discharge plate 4 starts retreating and the timer TM starts operating. Then, when a predetermined time elapses after the timer TM starts operating, the time limit contact 20 closes, and the self-holding relay KR2 is switched to the set position by energizing the set side coil thereof.

Accordingly, the first of the self-holding relays KR2
Since the relay contact 21 is closed and the first solenoid SOL1 is energized, the lifting cylinder 16 is shortened and the tail gate 5 is lowered. At the same time, the second relay contact 22 of the self-holding relay KR2 opens to cut off the power supply to the second solenoid SOL2. However, the discharge plate 4 operates before the start of the lowering of the tailgate 5 by a predetermined time, and retreats to a predetermined position in the dust container 2, so that the lower end of the tailgate 5 and the discharge plate 4 There is no collision with the tip portion 4a. In a state where the tailgate 5 is completely lowered and the rear opening 2a of the dust container 2 is completely closed, the tailgate 5 and the discharge plate 4 are kept so as to keep a predetermined interval. Thereby, when the garbage loading operation is started, the garbage loaded by the garbage input box and the discharge plate 4 in the tailgate 5 can be appropriately compressed, so that the garbage can be efficiently placed in the garbage storage box 2. Can be loaded.

On the other hand, the self-holding relay KR2 keeps the set position until the second switch SW2 is switched to the forward side of the discharge plate and the reset coil is energized. Accordingly, when the tailgate 5 is lowered, the descent of the tailgate 5 is interrupted by operating the first changeover switch SW1 for some reason, and then the first switch is again turned on.
Even if the changeover switch SW1 is operated to resume the lowering of the tail gate 5, the first changeover switch SW1 does not energize the second solenoid SOL2, so that the discharge plate 4 does not retreat again.

When the loading of the refuse in the refuse storage box 2 proceeds, the discharge plate 4 compresses the loaded refuse appropriately while the refuse 15 , The inside of the dust storage box 2 is gradually retracted. When the second changeover switch SW2 is switched to the discharge plate forward side in order to discharge the refuse from the refuse storage box 2, the reset side coil of the self-holding relay KR2 is energized. To be held. This allows
As described above, it is possible to automatically and optimally perform the lowering operation of the tailgate 5 and the retreating operation of the discharge plate 4 after the dust is discharged.

That is, according to the control device 100 of this embodiment, the discharge plate 4 is advanced until the tip portion 4a of the discharge plate 4 projects from the rear opening 2a of the dust storage box 2, and the dust in the dust storage box 2 is moved. When the tailgate 5 is lowered after completely discharging the wastewater, the lower end portion of the tailgate 5 and the front end portion 4a of the discharge plate 4 do not collide with each other. Can be retracted into the refuse storage box 2 by a predetermined distance. Also, when the tailgate 5 is lowered, the operator may be in the first position for some reason.
After switching the changeover switch SW1 to interrupt the descent of the tailgate 5, the operator again operates the first changeover switch SW1.
Even if the tailgate 5 is lowered by switching operation of the refuse 1, the discharge plate 4 does not retreat into the dust container 2 again. As a result, the distance between the discharge plate 4, the scraping plate 11, and the deflector 14 in the longitudinal direction of the vehicle body can be maintained at a predetermined value.
Can be stored inside.

Although the embodiment of the control device for a refuse collection vehicle according to the present invention has been described in detail above, it is needless to say that the present invention is not limited to the above-described embodiment, and various changes can be made. No. For example, in the above-described embodiment, an opening for discharging garbage is provided at the rear of the garbage storage box, and a garbage collector equipped with a tailgate that opens and closes the rear opening by lifting is described as an example. It goes without saying that the position of the opening for discharging and the opening / closing direction of the tailgate can be appropriately changed.

[0038]

As is apparent from the above description, according to the control apparatus for a refuse collection vehicle of the present invention, the discharge plate is advanced until the tip of the discharge plate protrudes from the rear opening of the refuse storage box. The dust in the storage box can be completely discharged. Also, after discharging the garbage, when closing the rear opening of the garbage storage box by the garbage input box, prior to the closing operation of the garbage input box, The discharge plate can be retracted by a predetermined distance into the dust container. Further, when closing the rear opening of the dust storage box with the dust input box, the operator switches the first changeover switch for some reason to interrupt the closing operation of the dust input box, and then the operator again operates the first input switch. Even if the changeover switch is operated to restart the closing operation of the trash box,
The discharge plate does not retreat into the refuse storage box again. Thus, the distance between the discharge plate and the dust input box in the longitudinal direction of the vehicle body can be maintained at a predetermined value, so that the loaded dust can be appropriately compressed and stored in the dust storage box.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram of a control device for a refuse collection vehicle according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing a refuse collection vehicle to which the present invention is applied.

FIG. 3 is a side view schematically showing a state in which the garbage collection vehicle shown in FIG. 2 raises a tail gate and opens a rear opening of a garbage storage box.

FIG. 4 is an electric circuit diagram of a conventional control device for a refuse collection vehicle.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 garbage truck 2 garbage storage box 3 discharge cylinder 4 discharge plate 5 tailgate (garbage input box) 6 pushing plate 7 upper link 8 lower link 9 pushing cylinder 10 shaft fulcrum 11 raking plate 12 raking cylinder 13 sump 14 deflector 15 Garbage 16 Lifting cylinder 17 Support shaft 18 First relay contact 19 Second relay contact 20 Time limit contact 21 First relay contact 22 Second relay contact 100 Control device for garbage collection vehicle according to the present invention

Claims (5)

[Claims] An opening / closing means for opening / closing a dust container which can open / close an opening of a dust storage box mounted on a dust collection vehicle between a position where the opening is most opened and a position where the opening is closed; An advancing / retreating means for advancing and retreating a discharge plate whose tip portion can protrude from the opening between a position where the tip portion protrudes most from the opening and a position retracted into the garbage storage box; and Instructing means for instructing the opening and closing of the opening and closing means from the position where the opening is most opened to the side for closing the opening, and when the instructing means instructs to start the operation of the closing means, the closing means Prior to the start of the operation, the retreat means is operated for a predetermined time, the discharge plate is retreated a predetermined distance from a position where the discharge plate most protrudes from the opening, and after the predetermined time has elapsed, the instruction means is operated. Refuse collection vehicles the starting of operation of the closing means again be instructed operation of the switching means is resuming, characterized in that it comprises a control means for maintaining the holding state of operation prevents the moving means. 2. The apparatus according to claim 1, further comprising a second instructing means for instructing a start of operation of said advancing / retreating means from a position in which said discharge plate is retracted into said garbage storage box to a side where said tip portion projects from said opening. 2. The refuse collection vehicle according to claim 1, wherein the control unit cancels the holding state when the second instruction unit instructs the operation of the advance / retreat unit. 3. 3. The opening / closing means includes an opening / closing cylinder for opening / closing the refuse input box and a first electromagnetic solenoid set for electromagnetically operating a hydraulic control valve for controlling the operation of the refuse input box. A second electromagnetic solenoid set that electromagnetically operates a discharge cylinder for moving the cylinder forward and backward and a hydraulic control valve that controls the operation of the discharge cylinder, wherein the instruction means switches the energization to the first and second electromagnetic solenoid sets. A switching switch, wherein the control means includes a timer for controlling energization to the first and second electromagnetic solenoid sets and a relay for self-maintaining a state of energization to the first and second electromagnetic solenoid sets. The refuse collection vehicle according to claim 1, further comprising: 4. The garbage collection device according to claim 3, wherein said second instruction means has a second changeover switch for changing over the current supply to said first and second electromagnetic solenoid sets. car. 5. An opening / closing cylinder for opening / closing a dust insertion box capable of opening / closing an opening of a dust storage box mounted on a dust collection vehicle, and a discharge plate whose tip portion can protrude from the opening in the dust storage box. A control device for controlling the operation of a discharge cylinder to be controlled, wherein a first solenoid for electromagnetically operating a control valve for controlling the expansion / contraction operation of the open / close cylinder to a side on which the refuse input box closes the opening; A second solenoid that electromagnetically operates a control valve that controls the expansion and contraction operation to a side where the discharge plate retreats into the garbage storage box, and a third solenoid that electromagnetically operates a side where the discharge plate advances toward the opening. A first changeover switch for switching the opening and closing of the dust bin, which energizes the second solenoid when the dust bin is switched to the side that closes the opening; When the discharge plate is switched to the side retracted into the refuse storage box, the second solenoid is directly energized,
A second changeover switch that energizes the third solenoid when the discharge plate is switched to a side that advances toward the opening; and an operation that energizes the second solenoid through the first changeover switch. A timer that starts and closes a time limit contact after a lapse of a predetermined time; a first relay that is switched to a set position when energized by closing the time limit contact and that is interposed between a power supply side and the first solenoid When the contact is closed and the second relay contact interposed between the first switch and the second solenoid is opened, and the third solenoid is energized by the second switch, the switch is switched to the reset position. A self-holding relay that opens the first relay contact and closes the second relay contact. Control device.