JPH11130206A - Garbage collecting vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a garbage collecting vehicle that uniforms the compression of loads for improved loading efficiency. SOLUTION: The garbage that has inputted into a garbage input box 2 is raked up by a rotary plate 16 and is then raked into a garbage storage box 1 by a pusher plate 12. The garbage-pushing reaction force of or over a preset value that acts on the pusher plate 12 is detected by the first pressure detection switch, which detection changes over the second main switchover valve into the state that allows a discharge cylinder 34 to retreat a discharge plate 23 to thereby retreat the discharge plate 23. Even if the pusher cylinder is of a multistage type, this system produces uniform garbage compression and uniforms the garbage loading for sufficient loading efficiency that in turn leads to increased storage efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refuse collection vehicle, and in particular, to a refuse loading apparatus for loading refuse into a refuse storage box and discharging refuse from the refuse storage box. The present invention relates to a refuse collection vehicle provided with a discharging device.

[0002]

2. Description of the Related Art Generally, a refuse collection vehicle has a refuse storage box mounted, for example, at the center of a vehicle body, and a refuse input box disposed behind the storage box. In the dust box, a loading device is provided to load the dust into the dust box from the input port into the dust box. A discharge device having a discharge plate is provided.

[0003] This dust loading device is composed of a rotary plate supported by a rotary shaft provided in the dust input box along the vehicle width direction, and a push plate support provided on the dust input box above the rotary shaft. A push plate pivotally supported on a shaft, the rotary plate is operated by a hydraulic motor via the rotary shaft, the push plate is operated by a push cylinder, and is put into a garbage input box from an input port. The dust is scraped up by the rotating plate, and the pushing plate is swung from the rear end position to the front end position. Have been.

When the amount of dust loaded in the dust storage box increases during the dust loading operation, the reaction force from the dust acting on the pushing plate increases, and as a result, the hydraulic pressure of the pushing cylinder increases. When the hydraulic pressure of the pushing cylinder becomes higher than a predetermined value, the discharging line of the discharging cylinder is opened, and the hydraulic oil in the discharging cylinder is discharged by the response of the discharging plate which is retracted by the dust pushing pressure of the pushing plate, and the hydraulic pressure in the discharging cylinder is increased. Lower.

When the hydraulic pressure of the discharge cylinder decreases, the discharge plate retreats and the dust is loaded into the dust storage box while balancing the dust pressing pressure of the push plate. Then, when the hydraulic pressure of the pushing cylinder falls below the set value, the retraction of the discharge plate stops. By repeating this operation, the dust is sequentially loaded in the dust storage box while being compressed.

[0006] On the other hand, due to increasing concerns about environmental problems and resource recycling, recycling of empty cans, PET bottles, and the like has been called for.

As a countermeasure, the present applicant has proposed a refuse collection vehicle in Japanese Patent Application No. 9-210550.

[0008] The refuse collection vehicle is provided with a rotatable plate rotatably provided in a refuse input box to scrape the input refuse,
A push plate for loading the dust scraped up by the rotating plate into the dust container box, and a push plate movably supported between a storage position stored in the push plate and a projecting position protruding forward from the push plate. A dust loading device having an auxiliary pressing plate to be fixed and a fixing device for fixing the auxiliary pressing plate to the storage position and the projecting position is provided in the dust input box, while the horizontal movement is performed by expansion and contraction of a multi-stage discharge cylinder. A discharge device having a panel-shaped discharge plate is provided in the garbage storage box.

For loading low-volume garbage such as kitchen garbage, the auxiliary pushing plate is fixed to the storage position, and the garbage put in the garbage input box is scraped up by the rotating plate. Is efficiently loaded into the refuse storage box by the pushing plate.

On the other hand, when loading bulky dust such as empty cans and PET bottles, the auxiliary loading plate is fixed at the projecting position, the dust is scraped up by the rotating plate, and the lower surface of the auxiliary pushing plate protruding from the pushing plate. After the garbage is crushed and reduced in volume by the rotary plate and the rotating plate, the garbage is efficiently loaded into the garbage accommodating box by the pushing plate that swings to the swing front end position.

Further, when the hydraulic pressure acting on the pushing cylinder or the hydraulic motor, which rises with the increase of the reaction force acting on the pushing plate or the rotating plate caused by the increase of dust loaded in the dust container, becomes higher than a predetermined value. In the same manner as above, the hydraulic oil in the multi-stage discharge cylinder is discharged to lower the oil pressure, and the discharge plate retreats while balancing with the dust pressing pressure by the push plate, and the dust is loaded into the dust storage box. They are sequentially loaded in the garbage storage box while being compressed.

[0012]

According to the above-mentioned prior art, the pushing cylinder or the ascending cylinder which rises with the increase of the reaction force acting on the pushing plate or the rotating plate due to the increase of the dust loaded in the dust storage box. When the hydraulic pressure acting on the hydraulic motor for rotating the rotating plate becomes higher than a predetermined value, the hydraulic pressure of the multi-stage discharging cylinder provided in the discharging device is reduced, so that the discharging plate retreats while being balanced with the pressing pressure by the pressing plate. The refuse is loaded into the refuse storage box, and the refuse is efficiently compressed and sequentially loaded into the refuse storage box while being compressed.

However, since the discharge line of the discharge cylinder is opened and the hydraulic oil in the discharge cylinder is discharged by the dust pressing pressure by the pressing plate to lower the oil pressure, if the discharge cylinder is a multi-stage cylinder, Due to the characteristics, the effective cross-sectional area in the cylinder is not constant.For example, when loading dust into the dust storage box and near full load, a difference occurs in the reaction force of the discharge cylinder, causing unevenness in the application of pressure to the dust. There is a possibility that the loading becomes uneven and the loading efficiency is not sufficiently achieved.

[0014] Accordingly, an object of the present invention, which has been made in view of the above points, is to provide a refuse collection vehicle in which loading is uniform and loading efficiency is improved.

[0015]

According to a first aspect of the present invention, there is provided a rotary plate rotatably provided in a dust bin for scraping dust put in the dust bin. A loading device comprising: a push plate that swings between a swing front end position and a swing rear end position and loads dust that has been scraped up by the rotating plate into a dust storage box; and the push plate. A discharge plate supported in a dust storage box so as to be horizontally movable in a forward direction approaching the loading device and in a retreating direction away from the loading device, and extend and retract to move the discharge plate in the forward and backward directions. A discharge device having a discharge cylinder to be squeezed, a pressure detection switch for detecting a dust pushing reaction force acting on the pushing plate equal to or more than a predetermined value, and a dust pushing reaction force detection of the pressure detection switch exceeding the predetermined value. To discharge the discharge cylinder for a predetermined time. And having a control valve for holding switched to the plate retracted state.

According to the first aspect of the present invention, the lower dust is thrown up into the dust throwing box by the rotating plate, the scraped up dust is loaded into the dust receiving box by the pushing plate, and the dust is put on the pushing plate. A dust detection reaction force exceeding a predetermined value that acts is detected by a pressure detection switch, and the switching valve is switched and held for a predetermined time so that the discharge cylinder is in a state of retreating the discharge plate by the detection, and the discharge plate is actively retracted. Thereby, even if the pushing cylinder is a multi-stage cylinder, uniform compression can be applied to the dust, the dust can be uniformly loaded, and the storage efficiency can be increased.

According to a second aspect of the present invention, there is provided a push cylinder which expands and contracts by a supplied hydraulic pressure to swing the push plate, and a pressure detection switch detects a hydraulic pressure exceeding a predetermined value acting on the push cylinder. 2. The method as claimed in claim 1, wherein the switching valve is switched to the discharge plate retracted state for a period of time and held.
Can be carried out.

According to the third aspect of the present invention, it is possible to apply a pressing force corresponding to the type of dust to the dust by enabling adjustment of the holding time of the discharge plate by the switching valve.

According to a fourth aspect of the present invention, there is provided a rotary plate rotatably provided in a dust input box for scraping up the dust input into the dust input box, a swing front end position and a swing rear end. A push plate that swings between the positions and loads the dust scraped up by the rotary plate into the dust storage box, a storage position stored in the push plate, and a protruding position that projects forward of the push plate. A loading device having an auxiliary pressing plate that is selectively held, and a dust container that is disposed to face the pressing plate and that is horizontally movable in a forward direction approaching the loading device and a retreating direction away from the loading device. A discharge device including a discharge plate supported in the box, a discharge cylinder that expands and contracts by switching a switching valve to move the discharge plate in the forward and backward directions, and a discharge device having a predetermined value or more acting on the pushing plate. The first pressure detection sensor that detects the dust pushing reaction force And a second pressure detection switch for detecting a dust scraping reaction force acting on the rotary plate that is equal to or greater than a predetermined value, wherein the first pressure detection switch detects the dust pushing reaction force equal to or greater than the predetermined value. The switching valve is switched to the discharge plate retreating state for a predetermined time, and the second pressure detection switch is operated for a predetermined time when the second pressure detection switch detects a dust scraping reaction force equal to or more than the predetermined value in a state where the auxiliary pressing plate protrudes from the pressing plate. The discharge plate is switched and held in a retracted state.

In the invention according to the fourth aspect of the present invention, when loading relatively small bulky garbage or the like, the auxiliary pressing plate is stored and fixed in the pressing plate, and is put into the trash input box. The dust is scraped up by the rotating plate, and the dust scraped up by the rotating plate is scraped into the dust container box by the pushing plate, and the dust pushing reaction force acting on the pushing plate of a predetermined value or more is detected by the first pressure detection switch. By detecting the changeover valve and switching the discharge cylinder to the discharge plate retreat state for a predetermined time and holding the discharge plate backward, uniform compression can be applied to the refuse, the refuse can be uniformly loaded, and the loading efficiency can be improved. Achieved satisfactorily, resulting in increased storage efficiency.

On the other hand, for loading bulky dust such as empty cans and PET bottles, an auxiliary pushing plate is protruded from the pushing plate and fixed, and the lower dust is thrown into the dust throwing box by a rotating plate, and the auxiliary pushing is performed. The dust is crushed and reduced in volume by the lower surface of the plate and the rotating plate, and is loaded into the dust container box by the pushing plate, and the dust-raising reaction force acting on the rotating plate of a predetermined value or more is detected by the second pressure detection switch. By detecting the changeover valve, the discharge cylinder is switched to the discharge plate retracted state for a predetermined period of time, and the discharge plate is retracted, so that uniform compression can be applied to the garbage, and the garbage can be loaded uniformly and the loading efficiency is improved. As a result, the storage efficiency is increased, and the work of loading garbage is performed smoothly and efficiently.

According to a fifth aspect of the present invention, there is provided the pushing cylinder which expands and contracts by a supplied oil pressure to swing the pushing plate, and a hydraulic motor which rotates the rotating plate by rotating the supplied oil pressure. When the first pressure detection switch detects a hydraulic pressure acting on the push cylinder equal to or more than a predetermined value, the switching valve is switched to the discharge plate retreat state for a predetermined time and the second pressure detection is performed in a state where the auxiliary push plate protrudes from the push plate. When the switch detects a hydraulic pressure equal to or greater than a predetermined value acting on the hydraulic motor, the switch switches and holds the switching valve in the discharge plate retreat state for a predetermined time, and detects the hydraulic pressure supplied to the push cylinder or the hydraulic motor. The described invention can be easily implemented.

According to a sixth aspect of the present invention, there is provided a projection detecting switch for detecting the projection of the auxiliary pressing plate, wherein the second pressure detecting switch is operable when the projection detecting switch is in the auxiliary pressing plate projection detecting state. Accordingly, the invention according to claim 4 or 5 can be efficiently implemented.

According to a seventh aspect of the present invention, the type of garbage can be adjusted by making it possible to adjust the holding time of the discharge plate retreating state by the switching valve based on the pressure detection of the first pressure detection switch and the second pressure detection switch. It is possible to apply a pressing force corresponding to.

The invention described in claim 8 is characterized in that when the discharge cylinder is switched to the retreating state, the hydraulic pressure is supplied to the contraction-side hydraulic chamber of the discharge cylinder, and the operation is further ensured. .

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a refuse collection vehicle according to the present invention will be described with reference to FIGS.

FIG. 1 is a side view of an essential part for explaining an outline of a refuse loading device provided in a refuse collection vehicle. Reference numeral 1 denotes a refuse storage box mounted on the center of a vehicle body. The upper end of the dust input box 2 is swingably supported behind the box 1 via a bracket, and the dust input box 2 is expanded and contracted by a lift cylinder 35 installed between the dust storage box 1 and the dust input box 2. It is configured to swing with respect to the dust storage box 1 and to lock the lower end of the dust storage box 2 to the rear end of the floor surface 1a of the dust storage box 1 by the securing device 3 operated by the lock cylinder 31. ing.

A loading device 10 for loading the dust put in the dust input box 2 into the dust storage box 1 is disposed in the dust input box 2.
However, a discharge device 20 for discharging the dust loaded by the loading device 10 from the dust storage box 1 is disposed in the dust storage box 1.

The loading device 10 includes a push plate 12 pivotally supported by a push plate support shaft 11 disposed along the vehicle width direction in the dust bin 2 and a push plate 12 at a position below the push plate 12. A rotary plate 16 supported on a rotary shaft 15 disposed in the dust bin 2 along the vehicle width direction.
3 is driven to rotate via a rotary shaft 15 and the pressing plate 1
Reference numeral 2 denotes a position between the swing front end position and the swing rear end position around the push plate support shaft 11 by the expansion and contraction of a push cylinder 34 provided between the upper end of the push plate 12 and the upper end of the dust bin 2. Rocks.

On the other hand, the discharge device 20 disposed in the dust container 1 has a panel-shaped discharge plate 23 supported on the floor surface 1a so as to be horizontally movable and opposed to the push-in plate 12. The discharge plate 23 is configured to move horizontally by expansion and contraction of a multi-stage discharge cylinder 32 provided between the dust container 23 and the front part in the refuse storage box 1.

FIG. 2 shows a hydraulic circuit 30 for controlling the operation of each hydraulic device such as the lock cylinder 31, the discharge cylinder 32, the hydraulic motor 33, the push cylinder 34, and the lift cylinder 35.

In the figure, reference numeral T denotes an oil tank, P denotes a hydraulic pump, and the hydraulic pump P is a first, second, third, fourth and fifth main switching valves V1, V2, V3, V4, Lock cylinder 31 and discharge cylinder 3 via each solenoid valve of V5
2. It is connected to a hydraulic motor 33, a pushing cylinder 34, and a lift cylinder 35.

A portion between the hydraulic pump P and the contraction side oil chamber 31b of the lock cylinder 31 branches from the hydraulic pressure supply line A to
A connection pipe B1 connected by a connection pipe A1 interposed with the main switching valve V1 and connected to the extension-side oil chamber 31a of the lock cylinder 31 has a filter F at the other end with the first main switching valve V1 interposed. And is connected to a drain pipe B which is opened to the hydraulic tank T. Then, by locking the lock cylinder 31 by switching the first main switching valve V1, the lashing device 3 allows the dust input box 2 to be moved to the floor surface 1 of the dust storage box 1.
The tightening by the lashing device 3 is released by the elongation of the lock cylinder 31.

Hydraulic supply line A connected to hydraulic pump P
Is connected to the second main switching valve V2, and a connection line A is provided between the second main switching valve V2 and the contraction side oil chamber 32b of the discharge cylinder 32.
2 and the extension side oil chamber 3 of the discharge cylinder 32
2a and the 2nd main switching valve V2 are connected by the connection pipeline B2.

The second main switching valve V2 and the forward rotation supply port 33b of the hydraulic motor 33 are connected by a connection pipe B3 interposed by the third main switching valve V3, and the reverse rotation supply port 33a of the hydraulic motor 33 is connected. And the third main switching valve V3 are connected by a connection pipe A3.

The third main switching valve V3 and the extension-side oil chamber 34a of the pushing cylinder 34 are connected by a connection pipe A4 interposed with the fourth main switching valve V4, and are connected to the contraction-side oil chamber 34b of the pushing cylinder 34. Connection line B4 between the fourth main switching valve V4
Are linked by

The connection line A4 is activated when the oil pressure between the fourth main switching valve V4 and the oil chamber 34a on the extension side of the pushing cylinder 34, in other words, the oil pressure required for pushing the dust by the pushing cylinder 34 exceeds a predetermined value. First oil pressure detection switch P
The fourth main switching valve V4 in which S1 is disposed and the extension side oil chamber 35a of the lift cylinder 35 are connected by a connection pipe A5 interposed with the fifth main switching valve V5. The oil chamber 35b and the fifth main switching valve V5 are connected to the drain pipe B and tilt the dust box 2 by switching the fifth main switching valve V5. The description of the configuration is omitted because it is not relevant.

On the other hand, the extension-side oil chamber 32 of the discharge cylinder 32
a is connected to the drain line B by a first connection line C1 in which a relief valve Vr1 that is opened when a pressure equal to or more than a predetermined value is applied, and is excessively transmitted to the extension-side oil chamber 32a of the discharge cylinder 32. To prevent the hydraulic pressure from acting. Further, a relief valve V is provided between the supply line A and the drain line B.
r2 is connected by an intervening connection pipe.

FIG. 3 shows the first pressure detection switch PS1.
, Second, third, fourth and fifth main switching valves V
1, an electric circuit 4 for switching control of V2, V3, V4 and V5
0 indicates a main part.

In the figure, C is a controller, and SWs is a selection switch connected to the controller C for instructing discharge or loading of dust.

The control switch line a connected to the controller C has the first pressure detection switch PS1 and a normally closed type timer relay switch TIM-X. The solenoid switch CR- is connected in parallel with the timer relay switch TIM-X. X is provided.

From the controller C to the fourth main switching valve V4
And a control switch line c connected from the controller C to the second main switching valve V2.
Are connected by a control switch line d having a relay contact CR-x of the solenoid switch CR-X and a relay contact TIM-x of the timer relay switch TIM-X.

Next, the operation of the refuse collection vehicle thus configured will be described.

The discharge device 20 disposed in the trash storage box 1
The discharge plate 34 is extended to discharge the discharge plate 23 substantially to the floor surface 1a.
2 and the second main switching valve V2 is located at the upper rear end.
As shown in (2), the connection pipelines A2 and B2 are closed and the hydraulic pressure from the hydraulic pump P is switched to the position for supplying the connection pipeline B3.

When the selection switch SWs is switched to the loading side, the operation is performed as follows according to an instruction from the controller C.

As shown in FIG. 4 (a), the leading end of the rotating plate 16 is at the rotating plate position I at the start of loading where it substantially coincides with the rear end of the floor surface 1a of the dust container 1, and the pushing plate 12 swings. The refuse is put into the refuse input box 2 from the input port while being stopped at the front end position, and the loading switch 10 is operated by switching the selection switch SWs to the loading side.

The third main switching valve V3 is controlled so that the hydraulic pressure supplied from the hydraulic pump P is supplied to the forward rotation supply port 33b of the hydraulic motor 33 by the switching operation of the selection switch SWs.
Is switched, the hydraulic motor 33 rotates forward and the rotating plate 16 rotates.

As shown in FIG. 4B, when the rotary plate 16 reaches the rotary plate position II at the time when the push plate returns, the signal is input to the controller C, and the fourth main switching valve V4 is operated according to the instruction from the controller C. Hydraulic pressure is supplied to the contraction side oil chamber 34a of the push cylinder 34 via the switching connection line A4, and the push cylinder 34 contracts, and the push plate 12 at the swing front end position is swung toward the swing rear end position. Operation.

When the rotary plate 16 rotates and reaches the rotary plate position III at the time of completion of the return of the push plate shown in FIG.
2 swings to the swinging end position, the fourth main switching valve V4 is switched, and the connection pipelines A4 and B4 between the fourth main switching valve V4 and the push cylinder 34 are closed, and the push cylinder 34 contracts. Is stopped and the pushing plate 12 is held at the swinging rear end position.

The rotation of the rotary plate 16 by the hydraulic motor 33 is continued, and the dust put in the dust input box 2 is scraped up, and the tip of the rotary plate 16 is substantially flush with the rear end of the floor 1a of the dust storage box 1. When the corresponding loading plate position I at the start of loading is reached, the signal is input to the controller C, and the third main switching valve V3 is switched according to an instruction from the controller C, and the third main switching valve V3 and the hydraulic motor 33 are connected. Connection line A3, B between
3 is closed, the hydraulic motor 33 stops, and the rotating plate 16 stops at the rotating plate position I at the start of loading as shown in FIG.

Further, the fourth main switching valve V4 is switched in accordance with an instruction from the controller C, and hydraulic pressure is supplied to the extension-side oil chamber 34b of the pushing cylinder 34 via the connection pipe A3, whereby the pushing cylinder 34 is extended. Pressing plate 1 as shown in 4 (e)
2 is swung to the swing front end position, and the dust scraped up by the rotating plate 16 is pushed into the dust storage box 1 while being compressed and applied by the discharge plate 23 and the push plate 12 of the discharge device 20, and the fourth main switching is performed. The valve V4 is switched as shown in FIG.
Connection line A4 between main switching valve V4 and push cylinder 34
FIG. 4 shows that the connecting pipe B4 is closed, the contraction of the pushing cylinder 34 is stopped, and the pushing plate 12 is stopped at the swing front end position.
It returns to the state of (a).

By repeating each of the operations shown in FIGS. 4A to 4E, the dust continuously put into the dust input box 2 from the input port is sequentially pushed into the dust storage box 1 and stored.

In the dust pushing process in which the pushing plate 12 swings from the swinging rear end position to the swinging front end position, when a reaction force of a predetermined value or more due to dust acts on the pushing plate 12, that is, the dust pushing reaction force, The oil pressure in the connection pipe A4 connecting the four main switching valve V4 and the extension side oil chamber 34a of the pushing cylinder 34 rises in response to the dust pushing reaction force, and when the oil pressure reaches a predetermined value, the first pressure rises.
The pressure detection switch PS1 is turned ON.

When the first pressure detection switch 1 is turned on, the solenoid switch CR-X is operated to switch the relay contact CR-x from OFF to ON as shown in FIG. 3, the hydraulic pressure is supplied from the hydraulic pressure supply line A to the contraction side oil chamber 32b of the discharge cylinder 32 via the connection line A2, and the hydraulic pressure of the expansion side oil chamber 32a is changed to the connection line. B2 and 2nd
The gas is supplied to the connection pipe line B3 via the main switching valve V2, the discharge cylinder 32 contracts, and the discharge plate 23 moves backward in the front direction of the refuse storage box 1.

After the relay contact CR-x is turned on, after the set time of the timer relay switch TIM-X has elapsed, the relay contact TIM-x switches from ON to OFF, and the second main switching valve V2 switches to the state shown in FIG. Then, the contraction of the discharge cylinder 32 stops and the retreat of the discharge plate 32 stops. When the first pressure detection switch PS1 is turned off as the reaction force due to dust decreases with the retreat of the discharge plate 32, the solenoid switch CR-X is operated and the relay contact CR-x is turned off.
F and the timer relay switch TIM-x is set to O
Return to N state.

After the relay contact CR-x is turned on and the relay contact TIM-x is turned off, the retraction time T of the discharge plate 32 due to the contraction of the discharge cylinder 32 is determined by the setting of the timer relay switch TIM-X. It can be arbitrarily changed, and by adjusting the timer relay switch TIM-X according to the type of dust, a pressing force according to the type of dust can be applied to the dust.

The retreat of the discharge plate 23 in the forward direction due to the contraction of the pushing cylinder 32 caused by the turning on of the first pressure detection switch PS1 causes the reaction force due to dust to exceed a predetermined value.
It is repeatedly executed each time the pressure detection switch PS1 is turned ON.

According to this configuration, when the reaction force of the dust increases to a predetermined value or more when the dust is pushed by the pushing plate 12, the pushing cylinder 32 is contracted repeatedly for a predetermined time, and the discharge plate 23 is actively retracted. Will be. Therefore, the refuse is stored here in the refuse storage box 1 after being compressed and applied, and even if the pushing cylinder 32 is a multi-stage cylinder and the effective cross-sectional area in the cylinder is not constant due to its characteristic, the refuse can be removed. In this way, a uniform application of compression can be obtained, and the loading of the garbage can be made uniform, the loading efficiency can be sufficiently achieved, and the accommodation efficiency can be increased.

The retreat of the discharge plate 23 in the forward direction due to the contraction of the push cylinder 32 due to the ON of the first pressure detection switch PS1 causes the reaction force due to dust to become greater than a predetermined value.
It is repeatedly executed each time the pressure detection switch PS1 is turned ON.

Next, a second embodiment of the refuse collection vehicle according to the present invention will be described with reference to FIGS.

FIG. 6 is a side view of an essential part for explaining the outline of a dust loading device provided in the dust collection vehicle according to the present embodiment. The same reference numerals are given to the parts corresponding to those in FIG. The detailed description of is omitted.

The loading device 50 includes a push plate 12 pivotally supported by the push plate support shaft 11 in the dust bin 2 and an auxiliary push plate support arranged in parallel below the push plate support shaft 11. Auxiliary push plate 1 pivotally supported by push plate 12 via shaft 13
4 and a rotary plate 16 that is supported by a rotary shaft 15 disposed in the dust bin 2 at a position below the pushing plate 12 and is driven to rotate by a hydraulic motor 33.

The push plate 12 is formed with a substantially rectangular auxiliary push plate storage portion 12a which is open along the vehicle width direction so as to be able to accommodate the auxiliary push plate 14, and is provided between the upper end of the push plate 12 and the upper end of the dust bin 2. The push plate 12 swings between the swing front end position and the swing rear end position about the push plate support shaft 11 by the expansion and contraction of the push cylinder 34 provided on the shaft.

The auxiliary pressing plate 14 is shown in FIGS. 7 (a) and 7 (b).
As shown in FIG.
2a, the upper end of the auxiliary pressing plate 14 is pivotally supported by the pressing plate 12 by the auxiliary pressing plate support shaft 13 and further protrudes in a lower surface of the auxiliary pressing plate 14 in a sawtooth shape. Receiving portion 15a and pressure receiving portion 1 having a large number of protrusions
Dust movement restricting members 15b projecting downward from 5a are provided respectively.

The space between the pressing plate 12 and the auxiliary pressing plate 14 is
As shown in FIG. 7 (a), the auxiliary push plate 14 has a storage position in which the front surface 14b of the auxiliary push plate 14 is stored in the auxiliary push plate storage portion 12a substantially continuously with the front surface 12b of the push plate 12.
As shown in FIG. 7 (b), the pressure receiving portion 15 a of the auxiliary push plate 14 is selectively positioned and fixed at a projecting position where the pressure receiving portion 15 a projects forward from the front surface 12 b of the push plate 12 with the auxiliary push plate support shaft 13 as the swing center. An auxiliary pressing plate fixing device (not shown) is provided, and when the protrusion of the auxiliary pressing plate 14 is detected, for example, the auxiliary pressing plate 14 is turned on.
An actuation protrusion detection switch SW2 is arranged.

FIG. 8 shows a hydraulic circuit 60 for controlling the operation of each hydraulic device such as the lock cylinder 31, the discharge cylinder 32, the hydraulic motor 33, the pushing cylinder 34, and the lift cylinder 35.

Although the same reference numerals are given to the portions corresponding to those in FIG. 2, detailed description of the portions will be omitted, but a fourth main switching valve V4 and an extension-side oil chamber of the push-in cylinder 34 are provided in the connection line A4. The first pressure detection switch PS1 that is turned ON when the oil pressure between the first pressure detection switch 34a and the pressure sensor 34a becomes a predetermined value or more is provided.

Further, a third main switching valve V3
The hydraulic pressure in the connection pipe line B3 connecting the hydraulic motor 33 and the normal rotation side supply port 33b is equal to or higher than a predetermined value, in other words,
A second pressure detection switch PS2 that is turned ON when a reaction force due to dust having a predetermined value or more acts on the rotating plate 16 in the dust scraping process by the dust pump 6 is provided.

FIG. 9 shows the first, second, third, fourth and fifth main switching valves V1, V2, V3, V4 and V5 including the first and second pressure detecting switches PS1 and PS2. The main part of the electric circuit for switching control is shown, and the parts corresponding to those in FIG. 3 are denoted by the same reference numerals for convenience of explanation.

The control switch line a connected to the controller C includes the first pressure detection switch PS1, a normally closed timer relay switch TIM-X and a timer relay switch TIM arranged in series with the first pressure detection switch PS1. -X, a first switch line e provided with a solenoid switch CR-X disposed in parallel with the X, a second switch line f provided with the auxiliary plate protrusion detection switch SW2 and the solenoid switch CR-W, and the solenoid switch CR. -W relay contact CR-w, the second pressure detection switch PS2, the timer relay switch TIM-Y, and the third switch line g in which CR-Y is disposed in parallel with the timer relay switch TIM-Y. , Each of the switch lines e, f, and g are connected in parallel.

The relay of the solenoid switch CR-X is provided between a control switch line h connected from the controller C to the third main switching valve V3 and a control switch line c connected from the controller C to the second main switching valve V2. Contact CR
-X and a control switch line i having a relay contact TIM-x of a timer relay switch TIM-X.

On the other hand, the controller C sends the fourth main switching valve V
4 and a control switch line j connected to the controller C
To the control switch line c connected to the second main switching valve V2 by a control switch line k having a relay contact CR-y of the solenoid switch CR-Y and a relay contact TIM-y of the timer relay TIM-Y. It is connected.

Next, the operation of the garbage loading device of the garbage collection vehicle thus configured will be described.

First, a case will be described in which garbage such as kitchen garbage having a relatively low bulk is put into the garbage input box 2 and the garbage is loaded into the garbage storage box 1 by the loading device 50 and the discharging device 20.

Prior to the dust input into the dust input box 2, the auxiliary push plate 14 is previously placed in the auxiliary push plate storage section 12 a formed on the push plate 12 as shown in FIG. Is fixed to the storage position where the front surface 14b of the pusher 12 is substantially continuous with the front surface 12b of the pusher 12 by the auxiliary pusher plate fixing device. In the state shown in FIG. 7A, the protrusion detection switch SW2 is OFF as shown in FIG. 9, and the relay contact CR-x disposed on the second switch line f is OFF.
It is.

Then, similarly to the first embodiment, the discharge cylinder 34 of the discharge device 20 is extended to position the discharge plate 23 substantially at the rear end on the floor 1a, and the second main switching valve V
2 closes the connecting lines A2 and B2 as shown in FIG.
Further, it is held at a position where the hydraulic pressure from the hydraulic pump P is supplied to the connection pipeline B3.

The rotating plate 1 is similar to the first embodiment.
In the state where the leading end of 6 is substantially the same as the rear end of the floor 1a of the garbage storage box 1 at the loading start rotating plate position I and the pushing plate 12 is stopped at the swinging front end position, trash is introduced from the input port. By loading the box 2 and switching the selection switch SWs to the loading side to operate the loading device 50, the same operation as in the first embodiment is performed, and loading of dust is performed. Note that this operation is the same as that in the first embodiment, and therefore the description is omitted.

On the other hand, a case will be described in which dust such as a relatively bulky empty can or plastic bottle is put into the dust input box 2 and the dust is loaded into the dust storage box 1 by the loading device 50 and the discharging device 20. .

Prior to the insertion of dust into the dust insertion box 2, the auxiliary push plate 14, which is supported by the push plate 12 by the auxiliary push plate support shaft 13, is pushed in advance as shown in FIG. The pressure receiving portion 15a provided on the lower surface of the projection 14 is made to protrude from the auxiliary pressing plate storage portion 12a, and is fixed to the protruding state by the auxiliary pressing plate fixing device.

The auxiliary pressing plate 14 is used as the auxiliary pressing plate storage 1
In the state of protruding from inside 2a, the auxiliary push plate 54 is detected to be in the protruding position by the ON operation of the protruding detection switch SW2, the solenoid switch CR-W is energized, and the relay contact CR-w is turned on. Is switched to and held.

On the other hand, the discharge cylinder 34 of the discharge device 20 provided in the refuse storage box 1 is extended so that the discharge plate 23 is positioned substantially at the rear end on the floor 1a, and the second main switching valve V2
As shown in FIG. 9, the connection pipelines A2 and B2 are closed, and the hydraulic pressure from the hydraulic pump P is switched to the position for supplying the connection pipeline B3 and is maintained.

Then, as shown in FIG. 10 (a), the leading end of the rotary plate 16 is at the loading start rotary plate position I where the rear end of the dust storage box 1 substantially coincides with the rear end of the floor surface 1a, and the pushing plate 12 is in position. With the dust stopped at the swing front end positions, the dust is thrown into the dust throwing box 2 from the throw-in port, the selection switch SWs is switched to the loading side, and the loading device 50 is operated.

By switching the selection switch SWs, the third main switching valve V3 is switched so that the hydraulic pressure from the hydraulic pump P is supplied to the forward rotation supply port 33b of the hydraulic motor 33, and the hydraulic motor 33 rotates forward. The rotary plate 16 is driven to rotate via the rotary shaft 15.

When the rotary plate 16 reaches the rotary plate position II at the start of the return of the push plate shown in FIG. 10B, the signal is input to the controller C, and the fourth main switching valve V4 is switched according to the instruction from the controller C. Hydraulic pressure is supplied to the contraction-side oil chamber 34a of the push cylinder 34 via the connection pipe line B3, so that the push cylinder 34 contracts, and the push plate 1 located at the swing front end position.
2 is started to swing toward the swing rear end position.

The rotating plate position II at the start of the return of the pushing plate is:
The rotation angle of the rotary plate 16 from the rotary plate position I at the start of loading is larger than in the case of loading the relatively low-volume garbage such as kitchen garbage, in other words, from the swing front end position of the push plate 12. By delaying the swing start timing, the pushing time of the dust in the dust storage box 1 by the pressing plate 12 and the auxiliary pressing plate 14 is extended to prevent the dust from collapsing, and the dust is pushed and loaded into the dust storage box 1. This prevents dust from flowing back into the dust input box 2.

The rotating plate 16 rotates while scraping up the dust put into the dust input box 2 from the input port, and rotates as shown in FIG.
When the rotary plate position III is reached upon completion of the pushing plate return shown in
The push plate 12 swings to the rear end position, and the fourth main switching valve V
8 is switched as shown in FIG. 8, the connection pipelines A4 and B4 between the fourth main switching valve V4 and the push cylinder 34 are closed, the contraction of the push cylinder 34 is stopped, and the push plate 12 is swung. Hold in the end position.

The rotation of the rotary plate 16 by the hydraulic motor 33 is continued, and the dust swept up by the rotary plate 16 is rotated to the rotary plate position I at the start of loading shown in FIG. It crushes between the lower part of the pushing plate 12 at the rear end position of the swing and the pressure receiving portion 15 a provided on the auxiliary pushing plate 14.

When the dust is pressed against the pressure receiving portion 15a by the rotating plate 16 to be crushed, the dust moves from the front end of the pressure receiving portion 15a toward the dust container box 1 by the dust movement suppressing member 15b projecting downward from the front end of the pressure receiving portion 15a. In other words, the so-called dust is prevented from escaping, and the dust is efficiently crushed by the rotating plate 16 and the pressure receiving portion 15a to reduce the volume of the dust.

When the rotating plate position I at the start of loading is reached, the third main switching valve V3 is switched as shown in FIG. 10 are closed, the hydraulic motor 33 stops, and the rotating plate 16 stops at the loading plate position I at the start of loading as shown in FIG.

Further, the fourth main switching valve V4 is switched in accordance with an instruction from the controller C, and hydraulic pressure is supplied to the extension-side oil chamber 34a of the pushing cylinder 34 via the connection line A3, whereby the pushing cylinder 34 is extended. As shown in FIG. 10E, the push plate 12 positioned at the swing rear end position is swung to the swing front end position, and the dust scraped up by the rotary plate 16 is discharged to the discharge plate 23 and the push plate 12 of the discharge device 20. 9 is pushed into the refuse storage box 1 while being compressed, and the fourth main switching valve V4 is
, The connection pipelines A4 and B4 between the fourth main switching valve V4 and the push cylinder 34 are closed, the contraction of the push cylinder 34 is stopped, and the push plate 12 is stopped at the swing front end position. The state returns to the state shown in FIG.

By repeating each of the operations shown in FIGS. 10A to 10E, the refuse continuously introduced into the refuse input box 2 from the input port is sequentially pushed into the refuse storage box 1 and stored therein.

In the process of pushing dust into the pushing plate 12, when a reaction force of a predetermined value or more due to dust acts on the pushing plate 12, the fourth main switching valve V4 and the extension-side oil chamber 34a of the pushing cylinder 34 are connected. The first oil pressure detection switch PS1 is turned on when the oil pressure in the connection pipe line A4 to be connected rises above a predetermined value.
Operate.

When the first pressure detection switch 1 is turned on, the solenoid switch CR-X is operated and the relay contact CRx
Is switched from the OFF state to the ON state, and the second main switching valve V
2 is switched, the discharge cylinder 32 contracts, and the discharge plate 23
Begins to retreat.

After the relay contact CR-x is turned on, the relay contact TIM-x is switched from ON to OFF after the set time of the timer relay switch TIM-X has elapsed, and the second main switching valve V2 is switched to discharge cylinder 32. Of the discharge plate 32 stops. Further, when the first pressure detection switch PS1 is turned off when the reaction force due to dust decreases with the retreat of the discharge plate 23, the solenoid switch CR-
X operates to turn off the relay contact CR-x, and the timer relay switch TIM-x returns to the ON state.

After the relay contact CR-x is turned on and the relay contact TIM-x is turned off, the retraction time T of the discharge plate 32 due to the contraction of the discharge cylinder 32 is determined by the setting of the timer relay switch TIM-X. It can be arbitrarily changed, and by adjusting the timer relay switch TIM-X according to the type of dust, a pressing force according to the type of dust can be applied to the dust.

The retreat of the discharge plate 23 in the forward direction due to the contraction of the discharge cylinder 32 caused by the turning-on of the first pressure detection switch PS1 causes the reaction force due to dust to exceed a predetermined value.
It is repeatedly executed each time the pressure detection switch PS1 is turned ON.

According to this, when the reaction force of the dust increases to a predetermined value or more when the dust is pushed by the pushing plate 12, the discharge cylinder 32 is contracted repeatedly for a predetermined time, and the discharge plate 23 is positively retracted. That is, even when the discharge cylinder 32 is a multi-stage cylinder and the effective cross-sectional area in the cylinder is not constant due to its characteristics, uniform compression can be applied to the dust, the dust can be uniformly loaded, and the loading efficiency can be sufficiently improved. Achieved results in increased storage efficiency.

Further, similarly to the first embodiment, a normally open timer relay switch TIM-Xa can be used in place of the normally closed timer relay switch TIM-X.

When a reaction force due to dust, that is, a reaction force equal to or more than a predetermined value due to dust acts on the rotation plate 16 in the process of scraping dust by the rotation plate 16, the third main switching valve V 3 and the forward rotation supply port of the hydraulic motor 33. The pressure in the connection pipe line B3 connecting the second pressure detection switch Pb to the second pressure detection switch P3
S2 is turned ON.

When the second pressure detection switch PS2 is turned on, the solenoid switch CR-Y is operated to switch the relay contact CR-y from the OFF state to the ON state as shown in FIG. 11, and the second main switching valve V2 Is switched to supply the hydraulic pressure from the hydraulic pressure supply line A to the contraction side oil chamber 32b of the discharge cylinder 32 via the connection line A2.
The oil pressure in the extension-side oil chamber 32a is supplied to the connection line B3 via the connection line B2 and the second main switching valve V2, and the discharge cylinder 32 is contracted, so that the discharge plate 23 moves in the forward direction of the garbage storage box 1. fall back.

After the relay contact CR-y is turned on, after the set time of the timer relay switch TIM-Y has elapsed, the relay contact TIM-y is switched from ON to OFF, the second main switching valve V2 is switched, and the discharge cylinder 32 The contraction stops, and the retraction of the discharge plate 32 stops. When the discharge force of the dust decreases with the retreat of the discharge plate 32 and the second pressure detection switch PS2 is turned off, the solenoid switch CR-Y is turned off.
Operates to turn off the relay contact CR-y and to return the timer relay switch TIM-Y to the ON state.

After the relay contact CR-y is turned on and the relay contact TIM-y is turned off, the retreat time T of the discharge plate 32 due to the contraction of the discharge cylinder 32 is determined by the setting of the timer relay switch TIM-y. The pressing force according to the type of dust can be applied to the dust by adjusting the timer relay switch TIM-Y according to the type of dust.

The retreat of the discharge plate 23 in the forward direction due to the contraction of the discharge cylinder 32 caused by the turning-on of the second pressure detection switch PS2 causes the reaction force due to dust to exceed a predetermined value.
It is repeatedly executed each time the pressure detection switch PS2 is turned ON.

According to this, when the reaction force of the dust increases to a predetermined value or more when the dust is scraped up by the rotary plate 16, the discharge cylinder 32 is contracted sequentially for a predetermined time, and the discharge plate 23 is actively retracted. Will be. Therefore, even when the discharge cylinder 32 is a multi-stage cylinder and the effective sectional area in the cylinder is not constant, uniform compression can be applied to the dust, the dust can be uniformly loaded, and the loading efficiency can be sufficiently achieved. An increase in efficiency is obtained.

[0105]

According to the refuse collection vehicle according to the present invention described above, the dust put into the dust box is scraped up by the rotating plate, and the scraped-up dust is scraped into the dust box by the pushing plate. A dust detection reaction force of a predetermined value or more acting on the pushing plate is detected by a pressure detection switch, and the detection valve is used to stabilize the switching valve by switching the discharge cylinder to a discharge plate retreat state and positively retracting the discharge plate. Retraction of the discharge plate is obtained, and uniform compression is applied to the garbage,
The loading of the garbage becomes uniform, the loading efficiency is sufficiently achieved, and the storage efficiency is increased.

According to another refuse collection vehicle according to the present invention, for loading relatively low-volume garbage and the like, an auxiliary pushing plate is stored and fixed in the pushing plate, and is put into the trash box. The lower dust is scraped up by the rotating plate, and the dust scraped up by the rotating plate is scraped into the dust container box by the pushing plate, and the dust pushing reaction force acting on the pushing plate of a predetermined value or more is applied by the first pressure detection switch. Detecting and switching the discharge valve to the discharge cylinder retreat state by switching the discharge valve to the discharge plate stably, the discharge plate is stably retracted, so that uniform compression can be applied to the garbage, the garbage can be loaded uniformly, and the loading efficiency can be improved. Achieved satisfactorily, resulting in increased storage efficiency.

On the other hand, for loading bulky dust such as empty cans and PET bottles, an auxiliary push plate is protruded from the push plate and fixed, and the lower dust is thrown into the dust input box by a rotating plate, and the auxiliary push is carried out. The dust is crushed and reduced in volume by the lower surface of the plate and the rotating plate, and is loaded into the dust container box by the pushing plate, and the dust-raising reaction force acting on the rotating plate of a predetermined value or more is detected by the second pressure detection switch. By detecting the switching valve, the discharge cylinder is switched to the discharge plate retreat state and the discharge plate is retracted, so that uniform compression can be applied to the garbage, the garbage can be uniformly loaded, the loading efficiency is improved, and the storage efficiency is improved. And the garbage loading operation is performed smoothly and efficiently, which greatly contributes to the efficiency of the garbage collection operation by the garbage collection vehicle.

[Brief description of the drawings]

FIG. 1 is a side view of a main part for explaining an outline of a first embodiment of a refuse collection vehicle according to the present invention.

FIG. 2 is also a hydraulic circuit diagram.

FIG. 3 is also an electric circuit diagram.

FIG. 4 is an operation explanatory diagram, similarly.

FIG. 5 is also an operation explanatory view.

FIG. 6 is a main part side view for explaining an outline of a second embodiment of the refuse collection vehicle according to the present invention.

FIGS. 7A and 7B are schematic explanatory diagrams illustrating the operation of the pushing plate and the auxiliary pushing plate, wherein FIG. 7A is a diagram illustrating a stored state of the auxiliary pushing plate, and FIG. It is.

FIG. 8 is also a hydraulic circuit diagram.

FIG. 9 is also an electric circuit diagram.

FIG. 10 is an operation explanatory view, similarly.

FIG. 11 is an operation explanatory view, similarly.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dust storage box 2 dust insertion box 10 loading device 12 push plate 16 rotating plate 20 discharge device 23 discharge plate 32 discharge cylinder 33 hydraulic motor 34 press cylinder 52 press plate 54 auxiliary press plate PS1 first pressure detection switch PS2 second pressure Detection switch V2 Second main switching valve SW2 Projection detection switch

Claims (8)

[Claims] A dust loading box is connected behind a dust storage box, and a loading device for pushing the dust loaded in the dust storage box into the dust storage box; and a dust storage apparatus disposed in the dust storage box. A dust collection vehicle having a discharge device for discharging dust stored in the storage box; a rotating plate rotatably provided in the dust input box to scrape dust input into the dust input box; A loading device comprising: a push plate that swings between a front end position and a swing rear end position to load dust that has been scraped up by the rotary plate into a dust storage box; A discharge plate supported in a dust storage box so as to be horizontally movable in a forward direction approaching the loading device and in a retreat direction away from the loading device, and a discharge cylinder that expands and contracts to move the discharge plate in the forward and backward directions. And a discharge device having A pressure detection switch for detecting a dust pushing reaction force equal to or greater than a predetermined value to be used; and, based on the dust pushing reaction force detection equal to or greater than the predetermined value of the pressure detection switch, switching and holding the discharge cylinder in a retreat state for a predetermined time. A refuse collection vehicle, comprising: a switching valve; 2. A loading device, comprising: a push cylinder which expands and contracts by a supplied oil pressure to swing a push plate, and wherein the pressure detection switch detects the hydraulic pressure of a predetermined value or more acting on the push cylinder. The refuse collection vehicle according to claim 1, wherein the refuse collection vehicle is switched to the retreating state for a predetermined time and held. 3. The refuse collection vehicle according to claim 1, wherein a time for holding the discharge plate in the retracted state by the switching valve is adjustable. 4. A loading device for arranging a refuse input box connected behind the refuse storage box to push the refuse into the refuse storage box, and a refuse storage device disposed in the refuse storage box. A dust collection vehicle having a discharge device for discharging dust stored in the storage box; a rotating plate rotatably provided in the dust input box to scrape dust input into the dust input box; A pushing plate for swinging between the front end position and the swinging rear end position to load the dust scraped up by the rotary plate into the dust holding box; a storage position and a pushing plate stored in the pushing plate; A loading device having an auxiliary pushing plate selectively held at a projecting position protruding forward, and a retreating direction arranged to face the pushing plate and approaching the loading device and away from the loading device. Ejection supported in a garbage storage box so that it can move horizontally A discharge cylinder having a discharge cylinder that expands and contracts by switching the switching valve to move the discharge plate in the forward and backward directions, and a dust detection reaction force acting on the press plate of a predetermined value or more. 1) a pressure detection switch, and a second pressure detection switch for detecting a dust scraping reaction force acting on the rotating plate of a predetermined value or more, wherein the first pressure detection switch detects a dust pushing reaction force of the predetermined value or more. When the switching valve is switched to the discharge plate retreating state for a predetermined time, and the second pressure detection switch detects the dust scraping reaction force equal to or more than the predetermined value in a state where the auxiliary pressing plate protrudes from the pressing plate, the switching valve is turned on. A refuse collection vehicle, wherein the refuse collection vehicle is switched and held in a retreat state for a predetermined time. 5. A loading device comprising: a pushing cylinder which expands and contracts by a supplied oil pressure to swing a pushing plate; and a hydraulic motor which rotates the rotating plate by rotating by a supplied oil pressure. When the detection switch detects a hydraulic pressure acting on the push cylinder equal to or more than a predetermined value, the switch valve is switched to the discharge plate retreat state for a predetermined time, and the second pressure detection switch is turned on when the auxiliary push plate protrudes from the push plate. 5. The refuse collection vehicle according to claim 4, wherein when the hydraulic pressure acting on the hydraulic motor is equal to or greater than a predetermined value, the switching valve is switched to the discharge plate retracted state for a predetermined time and held. 6. A projection detection switch for detecting the projection of the auxiliary push plate, wherein the second pressure detection switch is operable when the projection detection switch is in the auxiliary push plate projection detection state. Or a refuse collection vehicle according to 5. 7. The discharge valve retraction state holding time by the switching valve based on pressure detection of the first pressure detection switch and the second pressure detection switch is adjustable. Garbage truck. 8. The refuse collection vehicle according to claim 1, wherein when the discharge cylinder is switched to the retracted state, hydraulic pressure is supplied to a contraction-side hydraulic chamber of the discharge cylinder.