JPH0479921B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention compresses and crushes the garbage thrown into a garbage input box (hereinafter referred to as the input box) and pushes it into the garbage storage box (hereinafter referred to as the storage box). The present invention also relates to a garbage collection vehicle that discharges the garbage in the storage box that has been pushed into the storage box by driving a discharge plate inside the storage box by a cylinder.

[Problems to be solved by conventional technology and invention]

The present applicant previously proposed a mechanism for compressing and crushing the garbage thrown into the input box and pushing it into the storage box.
The base end of the link is pivotally supported above the garbage inlet of the input box connected to the rear opening of the storage box, the tip of the link is pivotally supported above the packer plate, and the base end of the press plate is attached to the lower end of the packer plate. The base end of a press cylinder, which has a rod pivotally supported in the center of the press plate, is rotatably connected to a point displaced from the connection axis of the link with the packer plate. It has been proposed that a rod of a packer cylinder whose base end is pivotally supported downward is connected to a connecting shaft between the packer plate and the link.

In the proposed garbage loading device, in the first step when loading garbage into the dumping box, the rod of the press cylinder and the rod of the packer cylinder are both changed from the fully extended state to the most contracted state. . Then, in the second step of compressing and crushing the garbage thrown into the dumping box, the rod of the packer cylinder is brought into a state of being minimized and the rod of the press cylinder being slightly expanded from the final state of the first step. Thereafter, in the third step of further compressing and crushing the garbage in the input box, the rod of the press cylinder is brought into a state of maximum extension from the final state of the second step. Finally, in the fourth step of scraping up the compressed and crushed garbage in the input box toward the opening of the storage box, the rod of the packing cylinder is brought into the fully extended state from the final state of the third step. The garbage placed in the input box is compressed and crushed and pushed into the storage box.

By the way, this garbage loading device compresses and crushes the garbage with a press plate as the press cylinder operates, and also attaches the base end of the press cylinder to a link to increase the rotation angle of the press plate when pushing it into the storage box. Therefore, the amount of garbage that can be accommodated can be greatly increased, and it is highly effective.

On the other hand, when discharging the garbage in the storage box that has been pushed in, first release the lock on the input box that is provided at the rear opening of the storage box so that it can be opened and closed.
Thereafter, the input box is rotated upward and the discharge plate inside the storage box is moved rearward to discharge the garbage out of the storage box. After this dust discharge operation is completed, it is necessary to return the discharge plate to a predetermined position and lower the raised input box.

Conventionally, in order to do this, it was necessary to operate a manual switch to return the discharge plate to a predetermined position and to operate a manual switch to lower the input box, which was cumbersome. Further, since the lowering operation of the input box starts after the discharge plate has returned to a predetermined position, there is a drawback that the operation after discharging the garbage takes time and operation efficiency is low.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the previous ones, and its purpose is to provide a garbage collection vehicle that improves work efficiency by shortening the operating time after discharging garbage. be.

[Means for Solving the Problems] In order to achieve the above object, the garbage collection vehicle made according to the present invention compresses and crushes the garbage thrown into the garbage input box 2 and pushes it into the garbage storage box 1. A garbage loading device is provided in the garbage input box 2, and a discharge plate 53 driven by a discharge cylinder 52 for discharging outside the garbage in the garbage storage box 1 loaded and housed by the garbage loading device is provided. The garbage storage box 1 is provided in the garbage storage box 1, and the garbage input box 2 is provided at the opening 1a of the garbage storage box 1 so that the garbage input box 2 can be tilted up and down as it approaches the inside of the garbage storage box 1 by driving a lift cylinder 51. In the garbage collection vehicle, a detection means LSM-7 detects that the discharge plate 53 is closer to the opening of the garbage storage box 1 than a predetermined position when the garbage input box 2 is in the tilted upward position.
and means V-4 and SOL-8 for forming a circuit for reducing the rod of the lift cylinder 51 and tilting and lowering the garbage input box 2 in response to a switch operation at the time of detection by the detection means LS-7; Means for forming a circuit for supplying spilled oil from the lift cylinder 51 to the discharge cylinder 52 during the contraction operation of the rod of the lift cylinder 51 to reduce the rod of the discharge cylinder 52 and return the discharge plate 53 to a predetermined position. V-8, SOL-15, and the lift cylinder 51 in response to the return of the discharge plate 53 to the predetermined position.
means V-8, SOL-1 for forming a circuit for switching the spilled oil from the discharge cylinder 52 to another one;
It is characterized by having 4.

[Effect]

Due to this attack, when the garbage input box 2 is in the tilted upward position, the detection means LS-7 detects that the discharge plate 53 is closer to the opening of the garbage storage box 1 than the predetermined position.
is detected, it is assumed that the garbage in the garbage storage box 1 is being discharged, and the switch operation is accepted, and in response to this switch operation, the lift cylinder 5 is
The rod 1 is reduced and the garbage input box 2 is tilted and lowered. supplying spilled oil to the discharge cylinder 52 when the lift cylinder 51 is operating to reduce its rod in order to tilt and lower the garbage input box 2;
By reducing the rod of the ejection cylinder 52, the ejection plate 5
3 to a predetermined position, the lowering operation of the garbage input box 2 and the returning operation of the discharge plate 53 can proceed simultaneously. When the discharge plate 53 returns to the predetermined position by this operation, the oil spilled from the lift cylinder 51 is switched from the discharge cylinder 52 to another one, and the returning operation of the discharge plate 53 is completed.

〔Example〕

Embodiments of the apparatus according to the present invention will be described below based on the drawings, in which the same members are denoted by the same reference numerals.

FIG. 1 shows a garbage collection vehicle according to the present invention, in which a storage box 1 is mounted on a chassis a of the garbage collection vehicle A.
A charging box 2 is connected to the rear opening of the storage box 1, and a mechanical part of the garbage loading device as shown in FIGS. 2 to 5 is housed within the charging box 2.

In the figure, the input box 2 is tiltably connected to the rear part of the storage box 1 by a pin 3, and is normally locked in the illustrated state by an automatic locking device 54 so as to communicate with the rear opening 1a of the storage box 1. is maintained.

The input box 2 also has a garbage input port 2a at the rear.
is provided, and has a bottom portion 2b in which circular arc surfaces 2b ₁ and 2b ₂ are continuously formed, and inside the input box 2 is a mechanical part of a garbage loading device that compresses and crushes the garbage and pushes it into the storage box 1. It is stored.

Further, in FIG. 2, reference numeral 5 denotes a press plate having a width that touches the inner surfaces of both side walls of the input box 2, and a press plate 6 having a flat plate shape at the upper end of the press plate 5 and having the same width as the press plate has an axis. 7, they are rotatably connected to each other.

The upper and lower ends of the packer plate 6 have a pair of first links 8 and a pair of second links whose base ends are pivotally supported on the inner surfaces of both side walls of the input box 2 above the input opening 2a and spaced apart vertically. Tip of link 9 and shaft 1
A pack cylinder 13 is rotatably connected to the shaft 10 by 0 and 11, and the base end of the pack cylinder 13 is rotatably supported by a shaft 12 provided below the input box 2.
The tip of the rod 13a is rotatably connected.

Further, the first link 9 has a patch plate 6.
The base end of a press cylinder 15 is swingably connected to a shaft 14 provided via a displacement 1 with a connecting shaft 10, and the tip of a rod 15a of the cylinder 15 connects to a shaft provided in the center of the press plate 5. 16 so as to be rotatable.

17 is a guide rail for a roller (not shown) provided on the connecting shaft 7 between the press plate 5 and the packing plate 6; 18 is a guide rail for a roller (not shown);
This is a shielding plate that shields the upper part of the

Therefore, the base end shaft fulcrum of each of the first and second links 8 and 9 connecting the upper and lower parts of the above-mentioned Patchka plate 6 is as follows.
The front surface of the cover plate 6 is configured to be movable while maintaining a constant distance from the lower end of the shielding plate 18.

Next, the operation process of the mechanical part of the garbage loading device will be explained with reference to FIGS. 2 to 5.

In the first step of inputting garbage into the input box 2 from the input port 2a, as shown in FIG. 2, the rod 15a of the press cylinder 15 and the rod 13a of the packing cylinder 13 are both fully extended from the state shown in FIG. As shown, the rod 15a of the press cylinder 15 is in the most contracted state, and the rod 13a of the packer cylinder 13 is in the most extended state, and at the end of this stroke, the press plate 5 is held in a substantially horizontal state, and the packer plate 6 is in the most extended state. It is held in the highest position.

Next, in the second step for compressing and crushing the input garbage, as shown in FIGS. 3 and 4, when the packer cylinder 13 is operated to reduce the rod 13a, the packer plate 6 is moved to the first and second positions. As the rings 8 and 9 rotate counterclockwise, they descend along the guide rail 17, and the press plate 5
The rod 13a of the packer cylinder 13 descends in a substantially horizontal state and compresses and crushes the garbage by enveloping it between it and the bottom 2b of the dumping box 2.
In the semi-reduced state, the press cylinder 15 is operated to slightly extend and close the rod 15a.

Next, in the third step for compressing and crushing the garbage in the input box 2, as shown in FIGS. 4 and 5, when the rod 15a of the press cylinder 15 is brought to the maximum extension state, the press plate 5 is moved to the compressor plate. 6 and the connecting shaft 7 rotates clockwise.

Therefore, the tip edge of the press plate 5 rotates while slidingly contacting the bottom arcuate surface _2b1 of the input box 2, compressing and crushing the garbage between the press plate 5 and the arcuate surface _2b2 .

In the subsequent fourth stroke, after the rod 15a of the press cylinder 15 reaches the maximum extension state, the locking cylinder 13 is operated to extend the rod 13a, and the locking plate 6 moves the first and second links 8 and 9 in the clockwise direction. The rotation moves it upward along the guide rail 17.

Therefore, the tip edge of the push plate 5 rises while slidingly contacting the bottom arcuate surface _2b2 of the input box 2, and scrapes up the compressed and crushed garbage toward the opening 1a. At the end of this fourth stroke, the rod 13a of the packer cylinder 13 is at its maximum extension as shown in FIG. 2, and the press plate 5 pushes the garbage into the storage box 1, closing the opening 1a.

In this state, the collection vehicle travels, and at the next collection location, the press cylinder 15 is operated to bring the rod 15a to the minimum contracted state, and the press plate 5 is
is raised to a substantially horizontal position, and garbage is loaded again through each of the above steps.

Returning to FIG. 1 again, when discharging garbage from the storage box 1 which is full of garbage loaded by the mechanical part of the garbage loading device stored in the input box 2, First, the loading box 2 is tilted upward about the shaft 3. For this purpose, a rod 51a of a lift cylinder 51 whose base end is rotatably supported on the storage box 1 is rotatably connected to the loading box 2. . Further, in order to discharge the garbage in the storage box 1 while the input box 2 is raised, a discharge plate 53 driven by a discharge cylinder 52 is housed in the storage box 1.

Note that before the input box 2 is raised as described above, the input box 2 and the storage box 1 are completely tightened and held in the state shown in the figure by the automatic locking device 54 driven by the cylinder 73 (described later). Therefore, it is necessary to release the tightening by the automatic locking device 54 in order to raise the lock.

On the other hand, inside the driver's cab b, there is a power take-off (PTO) switching handle 55 and a switch panel 56.
and is provided. The switch panel 56 includes a power changeover switch, a loading box operation switch, a discharge plate operation switch, an individual operation switch, and the like. Then, on the left side of input box 2, there is a "load" push button,
A loading operating panel 57 with a "stop" push button and a "buzzer" push button is mounted on the right side (not visible in FIG. 1), and an operating panel consisting of an "emergency stop" push button is mounted on the right side (not visible in FIG. 1).

FIG. 6 shows the hydraulic circuit of the garbage collection vehicle according to the present invention, and in the figure, 61 is the garbage collection vehicle A (FIG. 1).
, 62 is a PTO device that is disconnected by the PTO switching handle 55, 63 is a gear pump,
64 is an oil tank, 66 is a suction filter, 66a, 66c, 66d are in-line check valves, 67a, 67b are pilot operator check valves, and 68a, 68b are check valves with tightening. V-1 to V-8 are solenoid valves, 71a and 71b are relief valves, 72
73 is a return filter, and 73 is a tightening cylinder in which the automatic locking device 54 operates. The hydraulic pressure generated by the operation of the gear pump 63 is applied to the cylinders 13, 15, 5 by the switching operation of the solenoids of the solenoid valves V-1 to V-8, respectively.
1, 52, and 73 to operate these cylinders.

In addition, solenoid valve V-1 is a solenoid
Has SOL-4 and SOL-5, solenoid SOL
By energizing SOL-4 and SOL-5, hydraulic pressure is supplied to the packing cylinder 13 to expand and contract the rod 13a, respectively. The solenoid valve V-2 has solenoids SOL-2 and SOL-3, and supplies hydraulic pressure to the press cylinder 15 by energizing the solenoids SOL-2 and SOL-3 to contract and expand the rod 15a, respectively. V-3
has SOL-10 and return solenoid SOL-1
By applying zero current, hydraulic pressure is supplied to the discharge cylinder 52 to reduce the rod. Solenoid valve V-
4 has solenoids SOL-7 and SOL-8,
Solenoid valve V-8 is solenoid SOL-1
4 and SOL-15, solenoid SOL-7
Lift cylinder 5 is activated by energizing SOL-14.
Supply hydraulic pressure to 1 to extend the cylinder rod,
By energizing the solenoids SOL-8 and SOL-15, hydraulic pressure is supplied to the lift cylinder 51 and discharge cylinder 52 to contract both rods. Solenoid valve V-5 is a locking/opening solenoid.
By energizing the solenoid SOL-11, the automatic locking device 54, which has a SOL-11 and reduces the rod of the lock cylinder 73 to a reduced image and maintains the tightened state, is tightened by energizing the solenoid SOL-11. Extend and release the rod. The solenoid valve V-6 has a solenoid SOL-6, and when the solenoid SOL-6 is energized, a part of the hydraulic pressure that is being supplied to the press cylinder 13 is supplied to the press cylinder 15 to extend the rod 15a. Solenoid V-7 is Lenoid SOL-1
3, and is switched by energizing the solenoid SOL-13 to release the hydraulic pressure inside the cylinder 52, which increases due to the force applied from the outside to the rod of the discharge cylinder 52 to reduce the rod, through the relief valve 71b. to work.

FIG. 7 shows the electric circuit of the garbage collection vehicle according to the present invention, and in the figure, LS-1 to LS-13 are micro switches provided at various locations in the garbage collection vehicle A. The micro switches LS-1, LS-2A, and LS-2B are connected to the switch plate 6 as shown in Figures 8 and 9.
The micro switch LS-
1 is used to detect the shrinkage of the rod 15a of the press cylinder 15 when loading garbage and raising the input box, and micro switches LS-2A and LS
-2B is the press cylinder 15 when loading garbage.
used to detect the elongation of

Micro switches LS-3 to LS-5 are in input box 2
The micro switch LS-5 is operated by an operating cam 83 that rotates in conjunction with the second lever 9 that supports the packer plate 6. The micro switch LS-4 detects the extension start position of the cylinder 1, the micro switch LS-4 detects the extension of the rod 13a of the pack cylinder 13 when loading garbage and the loading box is lifted, and the micro switch LS-3 detects the extension of the rod 13a of the pack cylinder 13 when loading garbage. 13 rods 13a, respectively.

The micro switch LS-7 is provided in the storage box 1, and one contact is turned on and the other is turned off at a predetermined return position of the discharge plate 53 when the input box 2 is lowered and raised. Micro switch LS-
10, LS-10B, LS-11 are attached to the hinges of storage box 1 and input box 2, and LS-10, LS-1
0B is the rising angle of the input box 2 when the discharge plate 53 is activated.
LS-11 is used to turn on at 45 degrees or more to confirm the angle and enable operation, and to turn off when the input box 2 is lowered to automatically tighten the automatic locking device 54. Micro switch LS-
13 is provided at the PTO switching handle 55,
This is for turning on the power when the PTO device 62 is connected.

PB-1 to PB-4 are push button switches, which are operated by push buttons for "emergency stop", "stop", "loading" and "buzzer", respectively.
SW-1 to SW-4 are three-position torge switches, which respectively correspond to the power changeover, input box operation, discharge plate operation, and single operation switches on the switch panel 56 in the driver's cab. It should be noted that the other switches, except for switch SW-1, are switched only when manual operation force is applied, and return to the neutral position when the hand is released.

CR-1 to CR-13 are control relays, and the normally open and normally closed contacts of these relays are designated by the same code. T-1 to T-7 are timers,
When a preset time for the post-startup timer has elapsed due to energization, the contacts designated by the same symbol are turned on, and this state is maintained until the energization is removed.
SOL-1 to SOL-15 are solenoids, and solenoid SOL-1 is for operating the governor device to keep the engine rotation at a constant constant value.
Solenoid SOL-2, SOL-3 is for solenoid valve V-2, solenoid SOL-4, SOL-5
is for solenoid valve V-1, solenoid SOL
-6 is for solenoid valve V-6, solenoid
SOL-7, SOL-8 are solenoid valve V-4
For, SOL-10 is for solenoid valve V-3,
Solenoid SOL-11 is solenoid valve V-
5, SOL-13 is for solenoid valve V-7,
Solenoids SOL-14 and SOL-15 are for solenoid valve V-8. And SOL
-2, press cylinder 1 by energizing SOL-3
5. Contraction and extension movements of rod 15a, SOL-4,
When SOL-5 is energized, the rod 13a of the packer cylinder 13 contracts and expands, SOL-7, SOL
-14 is energized, the input box 2 rises and the discharge plate 53
ejection operation, the effect of the input box 2 by energizing SOL-8 and SOL-15, the return operation of the ejection plate 53,
Return operation of the discharge plate 53 by energization of SOL-10,
Automatic locking device 5 is activated by energizing SOL-11.
The tightening and opening operations of 4 are performed respectively, and the automatic return of the discharge plate 53 is enabled by energizing SOL-13.

Note that PS is a pressure switch, which is installed in the part of the lock cylinder 13 to which hydraulic pressure is supplied to extend the rod 13a of the lock cylinder 13.
It turns on when the oil pressure in this part exceeds a predetermined pressure.
In addition, D-1 to D-20 are diodes that control the direction of current flow, F is a fuse, BZ is a buzzer,
PL is a pilot lamp.

The operation of the garbage collection vehicle according to the present invention, which is equipped with the above-mentioned hydraulic circuit and electric circuit, will be described below with reference to time charts shown in FIGS. 10 and 11.

It is now assumed that the packer plate 6 and the press plate 5 are in the positions shown in FIG. 2, and the rod 13a of the packer cylinder 13 and the rod 15a of the press cylinder 15 are both in the most extended state. At this time, the microswitches LS-1 to SL-13 are in the state shown in FIG. 7.

In such a state, to carry out the loading operation, after turning the PTO switching lever 55 to "on", turn the power switch (torgue switch SW-1) to the "loading" side, and then press the loading pushbutton. When PB-3 is pressed, micro switch LS-13 is first changed from open to closed by the PTO switching lever 55, and relay CR-2 and relay CR-12 are energized. Further, by switching this switch SW-1 and operating the push button PB-3, the relay CR-3 is also energized. Then, relay CR-25 is energized by energizing relay CR-3.

By energizing relay CR-5, governor solenoid SOL-1 is energized and press contraction solenoid SOL-2 is energized to press cylinder 1.
The rod 15a of No. 5 is retracted. Note that at this time, timer T-1 is also energized and activated. The contact of timer T-1 turns on approximately 1 second after its activation.

As mentioned above, the rod 15 of the press cylinder 15
When the distance a is shortened, the microswitches LS-2A and LS-2B, which had been on until then, are turned off. Then, the rod 15a of the press cylinder 15
Due to the contraction of the press plate 5, the first stroke of movement is reversed, and the state shown in FIG. Become.

By closing this microswitch LS-1, relay CR-1 is energized through this switch. By energizing this relay CR-1, relay CR-
When relay CR-6 is energized, relay CR-7 is energized and relay CR-5 is de-energized. Furthermore, the energization of the relay CR-1 de-energizes the pull-less compression solenoid SOL-2, and the energization of the relay CR-7 energizes the packer compression solenoid SOL-4, causing the rod 13a of the packer cylinder 13 to retract. .

This retracting action of the rod 13a turns off the microswitch SL-4, which had been on until then, and correspondingly, the current to Relu CR-2 is no longer energized. As the relay CR-2 is de-energized, the relay CR6 is also de-energized, and in response, the timer T-2 is energized and activated. The contact of the timer T-2 turns on approximately 4 seconds after activation, which is longer than the contraction time of the rod 13a of the packer cylinder 13.

When the rod 13a of the pack cylinder 13 has been compressed to about half, the micro switch LS-5, which had been off until then, turns on, and the relay
When CR-9 is energized, timer T-3 is energized and activated. The press extension solenoid SOL-3 is energized by this energization of the relay CR-9, and the extension operation of the rod 15a of the press cylinder 15 is started. The contact of the timer T-3 turns on about 30 seconds after activation, which is longer than the extension time of the rod 15a of the press cylinder 15.

In this way, the rod of the packer cylinder 13 first begins to contract, then the rod 15a of the press cylinder 15 begins to extend, and then the primary pressure operation of the second stroke in which both operations proceed simultaneously is performed, and finally The state shown in FIG. 4 is reached, and the microswitch LS-1 is turned off in response to the start of the stretching operation of the rod 15a of the press cylinder 15. When the state shown in Fig. 4 is reached, the micro switch LS-3 is turned on from off.

By turning on this micro switch LS-3,
Relay CR-13 is energized, and the relay
CR-7 and timer T-2 are de-energized. Then, as the relay CR-7 is de-energized, the packer compression solenoid SOL-4 is de-energized and the retracting operation of the rod 13a of the packer cylinder 13 is completed. At this time, the relay CR-9 is still energized, so the press extension solenoid SOL-3 continues to be energized, and the second compression operation of the third stroke, in which the rod 15a of the press cylinder 15 continues to extend, is performed, and finally the fifth stroke. It will be in the state shown in the figure.

When the rod 15a of the press cylinder 15 has finished extending, the micro switch LS-2A is turned on and the LS-2A is turned on.
2B turns on. This micro switch LS−
2A turns on, relay CR-10 and timer T-
4 is energized, and when micro switch L-2B is turned on, relay CR-12 is energized. This relay CR
-10 is energized, press extension solenoid SOL
-3 is no longer energized, and instead of this, Patsuka extension solenoid SOL-5 and automatic return solenoid SOL-1
3 is energized and the rod 13a of the cylinder 13 is turned on.
The stretching motion begins.

Due to the extension of the rod 13a of the packer cylinder 13, a garbage pushing operation is performed to push the garbage in the input box 2 into the storage box 1.
Force is applied to the rod of the ejection cylinder 52 that drives the ejection plate 53 inside, and the rod tends to be compressed. For this reason, the oil pressure in the discharge cylinder 52 increases, but when the oil pressure at this time exceeds the set pressure of the relief valve 71b, the oil in the cylinder 52 is drained from the solenoid valve V.
-7, it flows out through the relief valve 71b, thereby allowing the discharge plate 53 to return. This return movement of the discharge plate 53 is performed by the cylinder 52.
It stops when the oil pressure becomes lower than the set pressure of the relief valve 71b.

Moreover, the rod 13a of the above-mentioned packing cylinder 13
During the stretching operation, if the garbage once becomes difficult to move within the storage box 1, the oil pressure within the packing cylinder 13 may rise and turn on the pressure switch PS. In such a case, timer T-
7 is energized and activated, and its contact is turned on after a predetermined time from activation. By turning on the timer T-7, the solenoid SOL-10 is energized, and in response, hydraulic pressure is supplied to the discharge cylinder 52 via the solenoid valve V-3, thereby retracting the rod 13a. Due to this contraction of the rod 13a, the discharge plate 5
3 is returned, a slight gap is formed between the garbage and the discharge plate 53, the resistance of the discharge plate 53 is eliminated, and the garbage that cannot be moved is transferred to the Patsuka cylinder 13.
It becomes possible to move by the extension of the rod 13a. When the pressure inside the packer cylinder 13 decreases due to this movement, the pressure switch PS is turned off, thereby de-energizing the solenoid SOL-10 and stopping the return operation of the discharge plate 53.

The contact of the timer T-4 turns on approximately 5 seconds after activation by energization, which is longer than the extension time of the rod 13a of the packer cylinder 13.

Micro switch LS-3 is turned off in response to the extension of rod 13a of packer cylinder 13, and as a result, relay CR-13 is no longer energized.
Thereafter, a fourth stroke of pushing operation is performed in which the rod 13a of the packer cylinder 13 is extended, and finally the state shown in FIG. 2 is reached.

When the rod 13a of the packer cylinder 13 is fully extended as shown in FIG.
LS-4 is turned on, and relay CR-2 is energized accordingly. By energizing relay CR-2, relay CR-5 is energized, and timer T-
1 is energized. Also, due to the energization of the relay CR-5, the energization of the clasp extension solenoid SOL-5 is stopped, and the extension operation of the rod 13 of the clasp cylinder 13 is completed, and instead of this, the press contraction solenoid SOL-5 is de-energized.
2 is energized and the rod 15a of the press cylinder 15
begins to shrink.

In response to the start of contraction of the rod 15a of this press cylinder 15, the micro switches LS-2A and LS-
2B is turned off, and thereafter the first stroke in which the rod 15a of the press cylinder 15 is retracted is performed, and the next second stroke, third stroke, and so on are repeated in the same manner as in the above case.

Now, near the end of the 4th stroke, operate the "Stop" pushbutton and turn off pushbutton switch PB-2.
At this point, all other relays, timers, and solenoids except for relay CR-12 are de-energized.
The device stops working.

Assuming that the micro switches LS-2A and LS-2B are on and all others are off in the state of the micro switches at the time of this operation stop, "loading" is started again.
The operation when the push button switch PB-1 is activated by operating the push button will be described below.

When switch PB-1 is activated, relay CR- is first activated.
3 is energized, and in response, relay CR-5 and timer T-1 are energized. By energizing relay CR-5, governor solenoid SOL-1 and press contraction solenoid SOL-2 are energized, and the rod 15a of press cylinder 15 starts to compress. After about 1 second, the contact of timer T-1 is turned on, relay CR-4 is energized, and in response, energization is applied to Patch extension solenoid SOL-5, causing the rod 13a of Patch cylinder 13, which is not fully extended, to be extended. An action is taken.

When the rod 15a of the press cylinder 15 is completely compressed during the extension operation of the rod 13a of the packer cylinder 13, the micro switch LS-
1 is on, and this micro switch LS-1
Relay CR-1 is energized by turning on. By energizing this relay CR-1, the press contraction solenoid
SOL-2 is de-energized and press cylinder 1
The contraction operation of the rod 15a of No. 5 is completed.

When the rod 13a of the locking cylinder 13 is fully extended, the micro switch LS-4 is turned on.
In response to this, relay CR-2 is energized. By energizing relay CR-2, relay CR-6 is energized instead of de-energizing relay CR-4. When relay CR-6 is energized, relay CR-7 is energized, but relay CR-5 is de-energized and timer T-1 is also de-energized.

In addition, the energization of the relay CR-7 energizes the packer contraction solenoid SOL-4, which in turn retracts the rod 13a of the packer cylinder 13.
The process starts, and thereafter the process is repeated in the order of 3rd, 4th, 1st, and so on.

Now, suppose that the operation of the plate stops due to dust in the middle of the above-mentioned second process, the contact of timer T-2 turns on approximately 4 seconds after starting, and relays CR-8 and CR-10 and timer T-2 are activated. T-4
is energized. When the relay CR-8 is energized, the press expansion solenoid SOL-4 is de-energized, and when the relay CR-10 is energized, the press extension solenoid SOL-3 is de-energized, but when the relay CR-10 is energized, the press expansion solenoid SOL-5 is energized. At the same time, timer T-5 is also energized and activated.

When approximately 1 second elapses after the timer T-5 is activated, its contact is turned on, relay CR-11 is energized, and in response, solenoid SOL-6 is energized. This solenoid SOL-6 operates the solenoid valve V-6, and part of the hydraulic pressure to the press cylinder 13 is supplied to the press cylinder 15, and the rod 15a of the press cylinder 15 is also extended at the same time. This is an operation to bring the state of the plate to the state after execution of the fourth step.

By the way, rod 1 of this packer cylinder 13
If the plate stops due to dust during the extension operation of 3a, its contact turns on approximately 5 seconds after the start of timer T-4, and relay CR-5 is activated.
is energized, and in response, timer T-1 and press compression solenoid SOL-2 are energized, and power is removed from patch extension solenoid SOL-5 and timer T-5, and the contact of timer T-5 is turned off. . By turning off the timer T-5 contact, the solenoid
Power to SOL-6 also disappears.

Approximately 1 second after the timer T-1 is started, its contact is turned on, relay CR-4 is energized, and in response, Patch extension solenoid SOL-5 is energized.
That is, about one second after the rod 15a of the press cylinder 15 is retracted, the rod 13a of the packer cylinder 13, which has not been fully extended, is extended. And the rod 15 of the press cylinder 15
When a is completely compressed, the micro switch LS-1 is turned on and the relay CR-1 is energized, and in response, the press contraction solenoid SOL-2 is de-energized.

After that, when the rod 13a of the pack cylinder 13 is fully extended, the first stroke is completed and the micro switch LS-4 is turned on, and the relay
CR-2 is energized.

When relay CR-2 is turned on, relay CR-6 is energized, but relay CR-4 and Patsuka extension solenoid SOL-5 are de-energized. and relay CR
-6 is energized, relays CR-8, CR-9 and
CR-10 loses power. This relay CR-8
In response to the de-energization, the packer contraction solenoid SOL-4 is energized and the retracting operation of the rod 13a of the packer cylinder 13 in the second stroke begins.

If the press plate stops moving due to dust during the third step after the end of the second step, the contact will turn on approximately 3 seconds after the start of timer T-3. ,relay
When CR-10 is energized, timer T-4 is activated. Then, the energization of the relay CR-10 energizes the pucker extension solenoid SOL-5 and the timer T-5, and the energization of the pucker extension solenoid SOL-5 starts the extension operation of the rod 13a of the pucker cylinder 13. After about one second, the contact of timer T-5 is turned on, energizing relay CR-11, and in response, solenoid SOL-6 is energized.

By energizing this solenoid SOL-6, hydraulic pressure is supplied to the press cylinder 15, and the rod 15 is
a performs an extension action, and at the end of the fourth stroke when the extension action ends, the micro switch LS-2A and
LS-2B is turned on, and accordingly relay CR-11, solenoid SOL-6 and timer T-5 are de-energized. Solenoid SOL−
6 is no longer energized, hydraulic pressure is no longer supplied to the press cylinder 15.

Thereafter, the extension of the rod 13a of the packer cylinder 13 progresses, and when the rod 13a is fully extended, the micro switch LS-4 is turned on, and in response, the relay CR-2 is energized. This energization of relay CR-2 energizes relay CR-5 and press contraction solenoid SOL-2, starts timer T-1, and starts the contraction operation of rod 15a of press cylinder 15. That is, after the first stroke starts, the second, third, fourth strokes, etc. are repeated in order.

Next, the operation when discharging the garbage stored in the storage box 1 will be explained.

First, the PTO switching lever 55 is brought into contact to perform the ejection operation, and then the switch SW-1 is turned to the "ejection" side. At this time, the rod 15a of the press cylinder 15 is not in the most contracted state, that is, it is not fully compressed, and the rod 15a of the packer cylinder 13 is
If 3a is not in the fully extended state, that is, it is not fully extended, the micro switches LS-1 and LS-
2B, LS-3 and LS-4 are all off and relays CR-1, CR-2, CR-12 and CR-
All 13 are not powered.

In this state, switch SW-2 is set to “up”
When tilted to the side, timer T-6 and solenoid SOL-
7, SOL-11 is energized. tightening open solenoid
By energizing SOL-11, the input box 2 is unlocked and can be raised. Further, the contact of timer T-6 is turned on approximately one second after this energization, thereby energizing relay CR-11, and in response, energizing solenoid SOL-14.

When the solenoids SOL-7 and SOL-14 are energized, hydraulic pressure is supplied to the lift cylinder 51 via the solenoid valves V-4 and V-8, and the rod 51
Extend a and raise the input box 2.

The reason why the energization of the solenoid 14 is delayed by about 1 second is to ensure that the automatic locking device 54 is released by increasing the hydraulic pressure supplied to the cylinder 73 via the solenoid V-5 by energizing the tightening/opening solenoid SOL-11. It is for.

As the input box 2 starts to rise, the micro switch SL-11 is turned on. Also, when the input box rises to a predetermined position of 45 degrees or more, the micro switch SL
-10, SL-10B turns on. When the operation of the switch SW-2 is stopped when the input box 2 has risen to a predetermined position, the switch SW-2 returns to the neutral position.

In the above condition, when switch SW-4 is tilted to the press extension and patch extension side, the press extension solenoid will be activated.
When the SOL-3 and the pin extension solenoid SOL-5 are energized, the rod 15a of the press cylinder 15 and the rod 13a of the pin cylinder 13 are extended simultaneously, and when the rod 15a of the press cylinder 15 is fully extended, the micro switch LS-2B is turned on. Then, relay CR-12 is energized, and Patsuka cylinder 13
When the rod 13a is fully extended, the micro switch
LS-4 turns on and relay CR-2 is energized.

By energizing the relays CR-12 and CR-2, the press extension solenoid SOL-3 and the snap extension solenoid SOL-5 are de-energized, and the extension operation of each cylinder is completed. This state is the state where the fourth stroke, that is, the pushing operation has been completed, and at this time, both microswitches LS-1 and LS-3 are off.

In this state, if the switch SW-4 is turned to the press compression or patch compression side in the future, the press compression solenoid SOL-2 and the patch compression solenoid SOL-4 will be energized, and the press cylinder 15 and the patch cylinder 13 will be energized.
The contraction operations of both rods are performed simultaneously. When the rod 15a of the press cylinder 15 is completely compressed, the micro switch LS-1 is turned on and the relay CR-1 is turned on.
1 is energized, and the rod 13a of the packer cylinder 13
When it is completely compressed, micro switch LS-3 is turned on and relay CR-13 is energized. Both relays CR
-1, CR-13 is energized, the press contraction solenoid SOL-2 and the pack compression solenoid SOL-4 are de-energized, and the contraction operation of each cylinder is completed.

Incidentally, when the rods of the press cylinder 15 and the press cylinder 13 are simultaneously extended and contracted, the hydraulic pressure to the press cylinder 13 is supplied by the discharged oil of the press cylinder 15, as is clear from the hydraulic circuit in FIG. In this state, the amount of oil required to expand and contract the rod 15a of the press cylinder 15 is
is smaller than the amount of oil required for expansion and contraction, the press plate 5 when both cylinders 15 and 13 are contracted.
The locus of is away from the arcuate surface _2b2 of the bottom 2b of the input box 2, as shown by X in FIG. Since it approaches the circular arc surface _2b2 , the garbage remaining in the input box 2 when the input box 2 is raised can be effectively dropped.

After dropping the garbage in the input box 2 by manual operation of the switch SW-4 as described above, the switch
When SW-2 is tilted to the descending side, the micro switch LS
Solenoid SOL-15 is energized via V-7, and solenoid SOL-8 is also energized, which causes hydraulic pressure to be supplied to lift cylinder 51 via solenoid valve V-4.
a is reduced. Due to this reduction, the cylinder 51
The oil flowing out is supplied to the discharge cylinder 52 via the solenoid valve V-8 and the check valve 68a, which reduces the rod and causes the discharge plate 53 to return.

When the discharge plate 53 returns to the predetermined position, the micro switch LS-7 switches to the opposite state from that shown in the figure.
As a result, the solenoid SOL-14 is energized instead of the solenoid SOL-15 being de-energized. By energizing the solenoid SOL-14, the oil spilled from the lift cylinder 51 flows to the drain via the solenoid valve V-4, and while it is no longer supplied to the discharge cylinder 52, the return operation of the discharge plate 53 is maintained as specified. At this time, when the machine stops at this position, the tightening/opening solenoid SOL-11 is energized via the micro switch LS-11, so the automatic locking device 54 is open, and the dropping box 2 is automatically locked. It can be moved downwardly beyond the device 54. When the input box 2 has descended sufficiently, the micro switch LS-11 is turned off and the tightening/opening solenoid SOL-11 is turned off.
As a result, the automatic locking device 54 is tightened and the input box 2 is locked.

〔Effect of the invention〕

As explained above, according to the present invention, when the input box is in the tilted up position and the ejection plate is closer to the opening of the storage box than the predetermined position, the ejection plate can be moved to the predetermined position by a single switch operation. Because the return of the input box and the tilting and lowering of the input box are performed at the same time, it is easier to operate than the conventional system that requires two switch operations, and the time required for the final lowering of the input box is shortened. This will improve work efficiency.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a side view showing a garbage collection vehicle according to the present invention, and FIGS.
The figures are sectional views showing different operating states of the mechanical parts of the garbage collection vehicle according to the present invention, FIG. 6 is a hydraulic circuit diagram showing the hydraulic circuit of the garbage collection vehicle according to the present invention, and FIG. 7 is a hydraulic circuit diagram showing the hydraulic circuit of the garbage collection vehicle according to the present invention. An electric circuit diagram showing an electric circuit, FIGS. 8 and 9 are diagrams showing the arrangement of microswitches in FIG. 7, and FIGS. 10 and 11 are time charts for explaining the operation of the device according to the present invention. 1 and 12 are diagrams showing the operation of the garbage collection vehicle according to the present invention. 1... Garbage storage box, 2... Garbage input box, 5...
Press plate, 6...Patzka plate, 13...
...Patsuka cylinder, 13a... Rod, 15...
Press cylinder, 15a... Rod, 51... Lift cylinder, 52... Discharge cylinder, 53...
Discharge plate, LS-7...Micro switch, SOL-
14, SOL-15... Solenoid, V-8...
Solenoid valve.

Claims (1)

[Scope of Claims] 1. The garbage loading box 2 is equipped with a garbage loading device that compresses and crushes the garbage thrown into the garbage loading box 2 and pushes it into the garbage storage box 1, and the garbage loading device loads the garbage. The dust storage box 1 is provided with a discharge plate 53 driven by a discharge cylinder 52 for discharging the dust contained in the dust storage box 1 to the outside, and the dust input box 2 is moved by the lift cylinder 51. The opening 1a of the dust storage box 1 is tilted upward and downward relative to the inside of the dust storage box 1.
In the dust collection vehicle provided in
The discharge plate 53 is removed from the dust storage box 1 from a predetermined position.
detection means for detecting that the
LSM-7, and means V-4, SOL- for forming a circuit for reducing the rod of the lift cylinder 51 and tilting and lowering the dust input box 2 in response to a switch operation at the time of detection by the detection means LS-7; 8, and a circuit for supplying spilled oil from the lift cylinder 51 to the discharge cylinder 52 during the contraction operation of the rod of the lift cylinder 51 to contract the rod of the discharge cylinder 52 and return the discharge plate 53 to a predetermined position. means V-8, SOL-15 for forming a circuit; and means V for forming a circuit for switching the spilled oil of the lift cylinder 51 from the discharge cylinder 52 to another in response to the return of the discharge plate 53 to a predetermined position. A garbage collection vehicle characterized by comprising: -8 and SOL-14.