JPS6343281B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a garbage collection vehicle, and more particularly to a garbage collection vehicle in which a ram cylinder device for driving a ram panel for pushing garbage is also used as a dump cylinder for opening a tailgate. About cars.

(Prior art) In order to open the tailgate by also using a ram cylinder device for pushing dirt, a dump stopper is provided on the tailgate that moves to the operating position and contacts the ram panel only when the tailgate is opened, and the ram cylinder device A system is known in which the force acting on the ram panel in the direction of opening the tailgate is applied to the tailgate via a dump stopper (Japanese Patent Application Laid-open No. 132525/1983).

(Problems to be Solved by the Invention) In this known garbage collection vehicle, when the ram cylinder device operates to load garbage and the ram panel rotates, the dump stopper is in a position where it interferes with the ram panel. It must be moved to a position where it does not touch the ram panel.

In this way, the dump stopper needs to be moved to either the garbage discharge position, which interferes with the ram panel, or the garbage loading position, which does not interfere with the ram panel, and it is necessary to ensure that it is in both positions. There must be. In addition, even though the dump stopper is in the ejection position,
If the garbage loading mechanism is operated incorrectly and the entire mechanism is activated, an accident may occur;
A similar danger exists if the garbage discharge mechanism is operated by mistake even though the dump stopper is in the loading position.

Therefore, the present invention enables the dump stopper to be reliably displaced to either the garbage discharge position or the garbage loading position by interlocking the dump stopper with the opening and closing of the hopper door of the tailgate, and also enables the dump stopper to be moved to either the garbage discharge position or the garbage loading position. To prevent the garbage loading mechanism from operating when the dump stopper is in the garbage loading position, and to prevent the garbage loading mechanism from operating when the dump stopper is in the garbage loading position, thereby preventing danger. With the goal.

(Means for Solving the Problems) According to the present invention, a tailgate is pivotally attached to the rear opening of a cargo box for storing garbage by a horizontal axis at the upper end thereof, and a sump is mounted inside the tailgate. The base end of the conveyor panel is rotatably attached so that the tip moves along the sump in order to scoop up thrown garbage toward the shipping box. A ram panel that is rotatably displaced so as to push the garbage stirred up by the conveyor panel into the cargo box is pivoted above the panel by a lateral pivot, and the part of the ram panel that protrudes upward from the lateral pivot A garbage collection device in which one end of a telescoping ram cylinder device is pivotally connected, the other end is pivotally connected to the upper part of a loading box opening, and the ram panel is configured to swing around its lateral axis due to the telescoping action of the ram cylinder. In a vehicle, a contact portion is provided at a portion of the ram panel that protrudes upward from the lateral pivot axis, and the contact portion is provided with a first contact portion on the movement locus when the ram panel swings due to expansion and contraction of the ram cylinder device.
A dump stopper is supported on the tailgate so as to be rotatably displaceable between this position and a second position removed from this position, and the dump stopper is rotatably displaced to the first position on the movement locus of the ram panel contact portion. A loading electric which allows the tailgate to be pivoted upwardly through the dump stopper by retracting the ram cylinder device and which controls the operation of the conveyor panel and the ram panel for loading the garbage into the bin. The dump stopper is provided with an interlocking mechanism for interlocking it with the opening and closing of the hopper door of the tailgate to close the hopper door. The interlocking mechanism is configured such that the dump stopper assumes a first position when the hopper door is opened, and the dump stopper assumes a second position when the hopper door is opened, while a first contact inserted into the circuit to open the loading electrical circuit when the dump stopper is in a first position and to close the loading electrical circuit when the dump stopper is in a second position; and a second contact inserted into the evacuation electrical circuit to close the evacuation electrical circuit when the dump stopper is in the first position and to open the ejection electrical circuit when the dump stopper is in the second position.

(Function) In the above configuration, the garbage thrown into the tailgate sump is scraped up toward the loading box as the conveyor panel rotates, and the scraped up garbage is pushed into the loading box by the ram panel.

When the operator closes the hopper door of the tailgate, the dump stopper is moved to the first position via the interlocking mechanism, and when the operator opens the hopper door, the dump stopper is moved to the second position.

When the dump stopper is pivoted between the first and second positions described above, the switch operates accordingly. When the dump stopper is moved to the second or loading position, the loading electrical circuit is closed at the first contact of the switch;
Since the evacuation electric circuit is opened at the second contact of the switch, the actuation of the evacuation electric circuit does not result in waste evacuation, but only waste loading. On the other hand, when the dump stopper is moved to the second position, that is, the ejection position, the ejection electric circuit is connected to the second
Since it is closed at the contact and the loading electric circuit is opened at the first contact of the switch, no garbage loading takes place when the loading electric circuit is operated, but only garbage removal takes place.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a cargo box of a garbage collection vehicle, and a tailgate 2 is provided to open and close an opening at the rear of the cargo box 1. As shown in FIG. As is well known, the tailgate 2 is composed of both side plates 2a and a sump 2b forming a bottom plate.
The upper end of the bracket 3 above the opening of the packing box 1
It is pivotally connected to the shaft 4 by a pivot 4. A known deflector 5 is provided between both side plates 2a.

A conveyor panel 6 is pivotally mounted on the sump 2b of the tailgate 2 by a pivot 7. The conveyor panel 6 is driven by a drive device (not shown).
It rotates so that its tip moves along the sump 2b, and moves the garbage dumped on the sump 2b as shown by arrow A (Fig. 2) toward the opening of the cargo box 1. Stir and stir.

Above the conveyor panel 6, a ram panel 8 is pivotally attached to the tailgate side plate 2a by a pivot 9. The ram panel 8 swings about a pivot shaft 9 as shown by arrow B (FIG. 2), and the swing is performed by a ram cylinder device 10. The ram panel 8 has a portion 8a projecting upward from its pivot 9, and the tip of this portion 8a is pivotally attached to the tip of a piston rod 10b of a ram cylinder device 10 by a pivot 12. The upper end of the cylinder 10a of the ram cylinder device 10 is connected to the pivot 13
It is pivotally connected to the bracket 3 by. Therefore, when the ram cylinder device 10 contracts, the ram panel 8 rotates counterclockwise from the position shown in FIG. 2, and as the ram cylinder device 10 expands, the ram panel 8 moves forward toward the position shown in FIG. do.

When loading garbage, as is well known, the conveyor panel 6 reaches the solid line position in FIG. 2 while scraping up the garbage on the sump 2b, and in this state, the ram panel, which had previously retreated to the right in FIG. 8 moves forward to the left by extension of the ram cylinder device 10 and pushes the garbage on the conveyor panel 6 into the cargo box 1.

By repeating the above operations, garbage is loaded into the cargo box 1, and when it becomes full, the tailgate 2 is opened for discharge. For this purpose, the dump stopper 20 provided inside the tailgate side plate 2a is operated. In the illustrated example, the dump stopper 20 is in the form of a bar whose middle portion is pivotally supported on the tailgate side plate 2a by a shaft 21.
A bar-shaped dump stopper 20 is provided inside each tailgate side plate 2a, and as shown in an enlarged view in FIG.
2 prevents it from rotating clockwise from the solid line position in the figure. On the other hand, the dump stopper 20 can be rotated counterclockwise in the figure. Shaft 21 of dump stopper 20
As shown in FIG. 4, the tailgate side plate 2a
It is supported by a boss 24 that passes through and is fixed.

A contact portion 25 is provided in a protruding manner on the protrusion portion 8a of the ram panel 8. This contact portion 25 is connected to the ram panel 8
When it rotates around its pivot 9, it is displaced along a trajectory m centered on the pivot 9, as shown in FIG. The dump stopper 20 is located between a solid line position in FIG. 3 located on this trajectory m (hereinafter referred to as the first position) and an imaginary line position located off this trajectory m (hereinafter referred to as the second position). It can be rotated freely. The first position is regulated by the stop member 22 as described above.

A base end of a link 27 is fixed to one end of a shaft 21 integral with the dump stopper 20 on the side opposite to the ram cylinder device 10 with respect to the tailgate side plate 2a. A long hole 28 is provided near the tip of this link 27. On the other hand, a pivot 30 is supported by a boss 29 fixed to the tailgate side plate 2a,
A pin 32 fixed to the tip of a link 31 protruding from this pivot 30 engages with the elongated hole 28 .

One end of a door lift arm 33 is fixed to the pivot 30 on the outside of the tailgate side plate 2a, and the other end of the door lift arm 33 is pivotally connected to a hopper door 35 by a shaft 34. During garbage loading, the hopper door 35 is pushed upward to expose the sump portion 2b, as shown in FIG.
Further, during normal driving and during and before and after the tailgate opening operation, it is pulled down as shown in FIG. 2 to cover the sump portion 2b. Link 27, long hole 28, pin 32, link 31, pivot 3
0, the door lift arm 33, and the shaft 34 constitute an interlocking mechanism that interlocks the dump stopper 20 with the opening and closing of the hopper door 35 of the tailgate.

As shown in FIG. 2, a discharge plate 37 is provided inside the front box 1 so as to be able to slide forward and backward, and this discharge plate 37 is normally located at the back of the cargo box 1 when discharging garbage. The discharge cylinder device 38 moves forward by extension and pushes out the garbage inside the cargo box 1 to the outside of the cargo box 1.

In the above configuration, when the worker raises the hopper door 35 from the solid line position in FIG. 2 to the imaginary line position prior to loading garbage, the door lift arm 33 moves as shown in the solid line in FIG. 3, and as a result, the pivot 30 rotates counterclockwise in FIG.
also rotates in the same direction. Therefore, the dump stopper 20 rotates from the first position to the second position and moves out of the trajectory m of the contact portion 25 of the ram panel 8. Therefore, as already mentioned, the loading operation can be performed by swinging the ram panel 8 around the pivot 9 by the expansion and contraction operation of the ram cylinder device 10.

When the inside of the cargo box 1 is full and the garbage is to be discharged, the hopper door 35 is closed after loading is completed, and the vehicle is driven to an appropriate disposal location. Keep the hopper door 35 closed during the ejection operation,
The ram cylinder device 10 is deflated. At this time, since the hopper door 35 is in the closed position, the dump stopper 20 is in the first position shown by the solid line in FIG. When the dump stopper 20 is moved, the contact portion 25 comes into contact with the lower surface of the dump stopper 20. And the ram cylinder device 10
The force in the contraction direction is transmitted to the tailgate side plate 2a via the dump stopper 20 and its shaft 21, and rotates the tailgate 2 upward. In addition,
The pushing up force of the contact portion 25 has a component that tends to rotate the dump stopper 20 clockwise in FIG.
Prevents rotation of 0.

In addition, since the hopper door 35 is locked to the tailgate 2 in the closed state by a locking device (not shown), the dump stopper 20 is also locked via the door lift arm 33 and the links 31, 27, and the tailgate is locked to the tailgate 2. Reliably held in the raised position. In this way tailgate 2
After opening, the discharge plate 37 is advanced by the cylinder device 38 to discharge the garbage.

In the embodiments described above, the abutment portion 25 of the ram panel 8 is formed by a dedicated protrusion that protrudes laterally, but this abutment portion is formed by making the outer end of the pivot 12 protrude laterally. Good too.

FIG. 5 shows a hydraulic circuit for operating the mechanism shown in FIG. In the figure, 40 is an electromagnetic switching valve that controls expansion and contraction of the discharge cylinder device 38, and has solenoids SOLa1 and SOLb1. This switching valve 40 is connected to the cylinder spaces on both sides of the discharge cylinder device 38 by pipes 41 and 42. 4
3 is a hydraulic motor 44 for rotating the conveyor panel 6;
Solenoid SOLa2,
It has SOLb2. Reference numeral 45 denotes an electromagnetic switching valve for controlling expansion and contraction of the ram cylinder device 10, which has solenoids SOLa3 and b3 and is connected to the cylinder spaces on both sides of the ram cylinder device 10 by pipes 46 and 47. 48 is an electromagnetic switching valve having a solenoid SOL4, which is connected to the pipe 46 via a pipe 49. This switching valve 48 is also connected to a discharge line 52 of the pump P via a relief valve 50 and a line 51.

As shown in FIG. 6, a cam 55 projects from the pivot of the ram panel 8 so as to rotate with the rotation of the ram panel. This cam 55 operates the micro switch LS-4 when the ram panel 8 rotates forward to the pushing completion position, and operates the micro switch LS-2 when the ram panel 8 returns in the opposite direction to the pushing direction and retreats to the pushing completion position. let On the other hand, micro switches LS-1 and LS-3 are provided around the pivot shaft 7 of the conveyor panel 6. Micro switch LS-1 is
It operates under the action of a cam 56 that rotates with the rotation of the conveyor panel 6 around the pivot shaft 7, and the operation of this microswitch LS-1 starts the retreat of the ram panel 8 as described later. Further, the micro switch LS-3 is operated under the action of a similar cam 57, and the operation of the micro switch LS-3 causes the conveyor panel 6 to be stopped as described later.

As already mentioned, as the hopper door 35 opens and closes, the door lift arm 33 rotates between the solid line position and the imaginary line position in FIG.
0 also rotates accordingly, but dump stopper 2
0 occupies a first position on the trajectory m (FIG. 3), that is, when the hopper door 35 is closed, a pair of micro switches are activated.
LS-5 and LS-6 are provided on the tailgate 2 side. In the illustrated example, these microswitches are pressed by the door lift arm 33 to close them. In addition, micro switch LS-
5, LS-6 is installed on the left and right sides of the tailgate, and both switches LS-5 and LS-6 are
Each consists of a set of normally open contacts and normally closed contacts, as described below.

FIG. 8 shows an electrical circuit used in the present invention. In the same figure, PBS-1 is the loading start button, PBS
-2 is a ram panel return button, PBS-3 is a ram panel push button, PBS-4 is a conveyor panel forward rotation button, and PBS-5 is an emergency stop button. In addition, SW1 is the tailgate operation switch,
SW2 is the discharge plate operation switch, SW3 is the main switch, F is the fuse, and E is the power supply. The normally open contacts and the normally closed contacts of the micro switches LS-5 and LS-6 are connected in series. That is, micro switch LS-5,
LS-6 is the first contact LS-5-1, which is a normally open contact.
LS-6-1 and the second contact LS-5- which is a normally closed contact
2, LS-6-2, contacts LS-5-1, LS
-6-1 are in series with each other, contacts LS-5-2,
LS-6-2 are also in series with each other. Contact LS
-5-1, LS-6-1 is micro switch LS-
5. When LS-6 is opened, it closes as shown,
Contacts LS-5-2 and LS-6-2 close when micro switches LS-5 and LS-6 are pressed. Micro switch LS-4 is two switch LS that work together.
-4-1, LS-4-2. Note that CR indicates a relay, CR1 and CR2 indicate relay contacts, and SOL5 indicates an engine acceleration solenoid.
A loading electric circuit (hereinafter referred to as a loading circuit) C and a discharge electric circuit (hereinafter referred to as a discharge circuit) D are branched from the main switch SW3. The discharge circuit D has second contacts LS-5-2, LS-6-
2. Tailgate operation switch SW1, discharge plate operation switch SW2, and solenoid SOLa1,
It is composed of SOLb1, SOLa3, and SOL4.
Loading circuit C has first contacts LS-5-1, LS-6
-1, loading start button PBS-1, relay CR,
Relay contacts CR1, CR2, micro switch LS
-1, LS-2, LS-3, LS-4-1, LS-4
-2, composed of solenoids SOLa2, SOLa3, SOLb3, etc.

Next, the operation of the mechanism described above will be explained.

When starting the garbage loading operation with the tailgate 2 closed as shown by the solid line in FIG. 2, first close the main switch SW3 on the left loading circuit C side in FIG.
Open 5. As a result, the normally open contacts of micro switches LS-5 and LS-6 are closed as shown in Figure 8.
LS-5-1, LS-6-1 are closed, normally closed contact LS-
5-2 and LS-6-2 open. In this state, when you press the loading start button PBS-1, contact LS-6-1,
Relay CR is energized via LS-5-1, and relay contacts CR1 and CR2 are closed. At this time, the conveyor panel 6 is in the position shown in Figure 6, so the micro switch LS-3 is activated and is in contact with the upper contact point in the diagram.
Therefore, the solenoid SOLa2 is energized via the relay contact CR1 and the micro switch LS-3, the switching valve 43 is switched to the right in FIG. The conveyor panel 6 rotates normally and starts rotating clockwise in FIG. 6. On the other hand, the engine acceleration solenoid SOL5 is energized via the relay contact CR2.

After the conveyor panel 6 rotates slightly in the normal direction, the cam 56 shown in FIG.
1 is operated and closed. At this time, micro switch LS-2 is closed, and the solenoid is connected via both micro switches LS-1 and LS-2.
SOLa3 is excited. Therefore, the pressure oil is in the pipe 46.
Since the ram panel 8 is sent into the lower space of the ram cylinder device 10 through the ram cylinder device 10 and the ram cylinder device 10 contracts, the ram panel 8 is rotated counterclockwise in FIG. At the end of this return stroke, cam 55 acts on micro switch LS-2 to open it. As a result, the excitation of the solenoid SOLa3 is cut off, the switching valve 45 returns to the neutral position, and the return movement of the ram panel 8 is stopped.

Meanwhile, the conveyor panel 6 continues to rotate in the forward direction, and when the cam 57 operates the micro switch LS-3 to displace the lower contact to the contact position as shown in FIG. 8, the excitation of the solenoid SOLa2 is cut off. Therefore, the switching valve 43 returns to the neutral position and the conveyor panel 6 stops. As mentioned above, when the micro switch LS-3 contacts the lower contact, the solenoid SOLb3 is energized because the micro switch LS-4-2 is in contact with the upper contact at this time, and the switching valve 4
5 moves to the left, pressure oil is supplied to the upper space of the ram cylinder device 10 via the pipe 47, and the ram cylinder 8 rotates clockwise and starts a pushing motion, thereby stopping. The garbage on the conveyor panel 6 inside is pushed into the packing box 1. Upon completion of pushing, the micro switch LS-4-2 is switched to the lower contact, so the excitation of the solenoid SOLb3 is cut off, the switching valve 45 returns to the neutral position, the ram cylinder device 10 is stopped, and the pushing of the ram panel 8 is stopped. ends. With this, micro switch LS-3,
The solenoid SOLa2 is energized again via LS-4-2, the conveyor panel 6 starts normal rotation, and the next cycle begins.

In the above cases, load start button PBS-1
It was assumed that the ram panel 8 was in the cycle completion position, ie, the push-in completion position, when was pressed. However, if the cycle is interrupted at a position in the middle of pushing where the ram panel 8 does not reach the pushing completion position, the loading start button PBS-
Assume that you press 1. In this case, if the conveyor panel 6 immediately starts rotating forward, the conveyor panel will collide with the lower edge of the ram panel 8. Such a situation can be avoided with the present invention. That is, when the ram panel 8 is in the middle of being pushed in, the micro switch LS-4-2 is in contact with the upper contact point, so it is impossible for the forward rotation solenoid SOLa2 of the conveyor panel 6 to be energized immediately, and the ram panel is first solenoid for
SOLb3 is first energized and the ram panel 8 performs a pushing stroke, and when the pushing is completed, the micro switch contact LS-4-2 is switched to the lower contact, and the solenoid SOLa2 is energized for the first time, causing the conveyor panel 6 to move forward. The rotation begins.

When loading is performed in the manner described above and the inside of the cargo box 1 is full, it is discharged. For this purpose, switch the main switch SW3 to the discharge circuit D side. At this time, the hopper door 35 has already been closed for the vehicle to travel to the discharge location, and the first contacts LS-5-1 and LS-6-1 of the micro switch open, and the second contact LS-5- 2, LS-6
-2 is closed. Therefore, even if the main switch SW3 were to be switched to the loading circuit C side again and the loading start button PBS-1 was to be pressed, the aforementioned loading operation by the loading circuit C would still be performed. There isn't.

To start discharging, turn the tailgate operation switch SW1 to the upward side (upper contact side). As a result, SOLa3 is excited, and the pressure oil is sent through the pipe 46 to the ram cylinder device 10.
to contract. At this time, since the hopper door 35 is closed, the dump stopper 20 is in the first position shown by the solid line in FIG. 2, and the tailgate 2 rotates upward.

Next, when the discharge plate operation switch SW2 is turned on to the discharge side (lower contact side), the solenoid SOLb
1 is energized, the switching valve 40 is switched to the left, pressure oil is sent to the discharge cylinder device 38 via the conduit 41, and the discharge plate 37 moves forward. Therefore, the garbage in the packing box 1 is discharged. After discharging, when the discharge plate operation switch SW2 is switched to the return side (the upper contact side), the solenoid SOLa1 is energized, and the discharge plate 37 retreats and returns to the back of the cargo box 1.

Next, when the tailgate operation switch SW1 is switched to the lower side (lower contact side), the solenoid SOL4 is energized and the switching valve 48 is switched to the left, so that the lower space of the ram cylinder device 10 (see Fig. 5 ) leads to the oil sump via pipes 46, 49, 55, so that the ram cylinder device 10
is allowed to gradually extend, and the tailgate 2 descends. After the descent is completed, switch SW1 is turned off.

When the discharge is completed as described above, loading is performed again, but since it is necessary to open the hopper door 35 at the time of loading, the micro switches LS-5 and LS-6 are deactivated and the contact LS- 5-2, LS-6-2 opens again. Therefore, at that time, if main switch SW3 were switched again to the discharge circuit D side, and the switch
Even if SW1 and SW2 are switched to either side, the discharge circuit D cannot operate.

The operations described above are normal loading and unloading operations, but if the main switch SW3 is switched to the loading circuit C side with the hopper door 35 closed, the following effects can be obtained. First, in this case, since the hopper door 35 is closed, the microswitch contacts LS-5-1 and LS-6-1 are open. In this state, press the loading start button PBS-
If you press 1, relay CR will not be energized,
Loading start button PBS-1, circuit 60 provided as necessary, button PBS-3, contact of PBS-2, closed micro switch LS-4-1
(Assuming that the ram panel 8 is not in the fully pushed position, it is closed), the micro switch LS-3 is closed to the lower normally open contact side, and the micro switch LS- is closed to the upper contact side. 4-
Solenoid SOLb3 is energized through step 2. Therefore, pressure oil is sent to the upper space of the ram cylinder device 10, and the ram panel 8 rotates in the pushing direction.
The pressure contact between the contact portion 25 of the ram panel and the dump stopper 20 is released. The above operation is useful for releasing the strong pressure contact between the abutting portion 25 and the dump stopper 20 and making it easier to move the dump stopper to a position where rotation of the ram panel 8 for loading is not hindered. When the ram panel 8 reaches the push-in completion position, the micro switch LS-4-1 opens and the circuit is cut off, making everything including the ram panel 8 inoperable.

〔Effect of the invention〕

As described above with respect to the embodiments, in the present invention, by temporarily interposing the dump stopper between the abutting part of the ram panel and the tailgate, the tailgate is moved by utilizing the expansion and contraction of the ram cylinder device via the dump stopper. The gate can be raised and lowered. Further, in the present invention, depending on whether the dump stopper is in the normal loading position or in the tailgate raising/lowering position, the circuits that operate the garbage discharge mechanism or the garbage loading mechanism are switched to a non-operating state. Therefore, reliable and safe operation without danger can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of the garbage collection vehicle of the present invention;
Fig. 2 is a vertical sectional side view of the same main part, Fig. 3 is an enlarged side view of a part of Fig. 2, Fig. 4 is a partially cutaway rear view of the same part,
FIG. 5 is a hydraulic circuit diagram, FIG. 6 is a micro switch layout diagram, FIG. 7 is a micro switch layout diagram related to the hopper door, and FIG. 8 is an electrical circuit diagram. 1... Packing box, 2... Tailgate, 2b... Sump, 4... Axis, 6... Conveyor panel, 7...
...Axis, 8...Ram panel, 9...Axis, 10...
...Ram cylinder device, 12, 13... Pivot, 20
... Dump stopper, 21 ... Shaft, 22 ... Stop member, 25 ... Contact portion, 37 ... Discharge plate, 38 ...
...Discharge cylinder device, 40, 43, 45, 48...
...Solenoid switching valve, 44...Hydraulic motor, SOLa1,
SOLb1, SOLa2, SOLb2, SOLa3, SOLb
3, SOL4, SOL5...Solenoid, LS-1,
LS-2, LS-3, LS-4, LS-5, LS-6...
…Micro switch (limit switch), SW
1...Tailgate operation switch, SW2...Ejection plate operation switch, SW3...Main switch,
LS-5-1, LS-6-1...1st contact, LS-5
-2, LS-6-2...Second contact, 27, 28,
30, 31, 32, 33, 34... interlocking mechanism, C
...Loading circuit, D...Discharge circuit.

Claims (1)

[Claims] 1. A tailgate is pivotally attached to the rear opening of a loading box that accommodates garbage by a horizontal pivot at its upper end, and a tailgate is provided within the tailgate for scooping up the garbage placed on the sump toward the loading box. The base end of the conveyor panel is rotatably attached so that the tip moves along the sump, and inside the tailgate, there is also a loading box above the conveyor panel to store the garbage scraped up by the conveyor panel. A ram panel that is rotatably displaced inwardly is pivoted by a lateral pivot, one end of a telescoping ram cylinder device is pivoted to a portion of the ram panel that protrudes upward from the lateral pivot, and the other end is pivoted. In a garbage collection vehicle that is pivotally mounted at the upper part of the opening of a loading box and is configured such that the ram panel swings around its lateral axis due to the expansion and contraction of the ram cylinder, the ram panel corresponds to the part that protrudes upward from the lateral axis. A contact part is provided on the tailgate so that the contact part can be freely rotated between a first position on the movement trajectory of the contact part and a second position deviated from this position when the ram panel swings due to expansion and contraction of the ram cylinder device. The dump stopper is supported, and the tailgate is rotated upward via the dump stopper by contracting the ram cylinder device while the dump stopper is rotationally displaced to a first position on the movement locus of the ram panel contact portion. A loading electric circuit that controls the operation of the conveyor panel and ram panel for loading garbage into the cargo box, and a discharge circuit that controls the opening and closing operation of the tailgate for discharging the garbage from the cargo box. An electric circuit is provided, and an interlocking mechanism is provided on the dump stopper to link it with the opening and closing of the hopper door of the tailgate,
The interlocking mechanism is configured such that the dump stopper assumes a first position when the hopper door is closed and the dump stopper assumes a second position when the hopper door is opened, while rotational displacement of the dump stopper between the first position and the second position a first switch inserted into the circuit for opening the loading electrical circuit when the dump stop is in a first position and closing the loading electrical circuit when the dump stop is in a second position; and a second contact inserted into the circuit so as to close the discharge electric circuit when the dump stopper is in the first position and open the discharge electric circuit when the dump stopper is in the second position. Garbage collection truck.