JPH1149308A - Garbage collecting car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a garbage collecting car in which work of loading different sorts of garbage including that of low bulkiness such as kitchen garbage, and that of high bulkiness such as cans and PET bottles can be efficiently performed. SOLUTION: Garbage of low bulkiness is scraped upward by a rotary plate 16 as an auxliary push plate 14 is contained and fixed in a pushing plate 12, so the garbage is loaded into a garbage containing box 1, where a discharge plate 23 is retracted to compress the garbage to be contained into the garbage containing box 1 as specified pushing reaction force of the garbage or more is applied to the pushing plate 12. For garbage of high bulkiness, the auxiliary pushing plate 14 is protruded from the pushing plate 12 to be fixed, the garbage is scraped upward by the rotary plate 16, it is crushed and compacted by a lower surface of the auxiliary pushing plate 14 and the rotary plate, and it is loaded into the garbage containing box 1 by the pushing plate 12, while loading of the garbage into the garbage containing box 1 is also allowed in a garbage scraping process by the rotary plate 16 by retraction of the discharge plate 23 by the garbage as specified scraping reaction force or more is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a garbage collection vehicle, and more particularly to garbage such as sorted low-volume garbage and so-called recyclable garbage such as bulky empty cans and plastic bottles. The present invention relates to a refuse collection vehicle capable of efficiently loading different types of refuse.

[0002]

2. Description of the Related Art Generally, a refuse collection vehicle is provided with a refuse storage box 101 at the center of the vehicle as schematically shown in FIG.

[0003] In the garbage input box 102, the trash input into the garbage input box 102 from the input port is filled with trash.
1 is provided with a loading device 103 for loading the garbage storage box 1
01, the discharge cylinder 1 is supported movably horizontally.
Panel-shaped discharge plate 11 which moves horizontally by expansion and contraction of 13
4 is provided.

[0004] The refuse loading device 103 includes a refuse input box 1
02, a rotating plate 105 rotatably supported by a rotating shaft 104 provided along the vehicle width direction, and a rotating shaft 10
And a push plate 107 swingably supported by a push plate support shaft 106 provided on the dust box 102 along the vehicle width direction above the rotary plate 4. The pushing plate 107 is operated by a pushing cylinder 108 by a hydraulic motor.

When the loading device 103 is operated, as shown in FIG. 10A, the tip of the rotary plate 105 is located at substantially the same height as the floor surface 101a of the garbage storage box 101, and the pushing plate 107 swings. In the state at the front end position, when dust is thrown into the dust throw-in box 102 from the throw-in port and a loading button or the like is operated, the rotary plate 105 starts to rotate as shown in FIG. As shown in FIG. 10C, the push plate 107 starts to swing from the swing front end position to the swing rear end position, and starts to scrape the dust put in by the rotating plate 105, and FIG. As described above, the tip of the rotating plate 105 rotates to the substantially same height as the floor surface 101a of the dust container 101 and stops.

Subsequently, as shown in FIG. 10 (e), the pushing plate 107 is swung from the swinging rear end position to the swinging front end position, so that the pushing plate 107 is swept up by the rotating plate 105. The dust is pushed into the dust box 101, and the pushing plate 107 stops at the swing front end position and returns to the position shown in FIG. By repeating these steps, the dust put into the dust input box 102 is sequentially pushed into the dust storage box 101.

When the amount of dust loaded in the dust storage box 101 increases during the loading of dust, the reaction force acting on the pushing plate 107 increases, and as a result, the hydraulic pressure of the pushing cylinder 108 increases. When the oil pressure of the pushing cylinder 108 becomes higher than a predetermined value, the oil pressure of the discharge cylinder 113 provided in the discharge device 110 for discharging dust is reduced.

When the hydraulic pressure of the discharge cylinder 113 decreases,
Discharge plate 1 while balancing the pressing pressure by pressing plate 107
When the dust 14 is retracted and the dust is loaded in the dust box 101 and the hydraulic pressure of the pushing cylinder 108 falls below the set value, the retraction of the discharge plate 114 stops. By this operation, the dust is sequentially loaded into the dust storage box 101 while being compressed.

[0009] On the other hand, due to increasing concerns about environmental issues and resource recycling, for example, recycling of empty cans, PET bottles and the like has been called for.

[0010] Recyclable garbage that is separated and collected from kitchen garbage as a recyclable material, such as garbage such as empty cans and PET bottles, is generally bulky. As shown in Japanese Patent Application Publication No. 8-225105, there is a refuse collection vehicle in which trash is crushed to reduce its volume and then pushed into a trash storage box.

However, the former is a refuse collection vehicle mainly suitable for loading low-volume garbage such as kitchen garbage, and loading high-volume trash such as empty cans and plastic bottles is not suitable for storing garbage. The collection efficiency and the transportation cost are undesirably increased due to the efficiency of loading the garbage in the box, and in the latter case, the bulky garbage can be crushed to reduce the volume and loaded efficiently. If excessive pressure is applied to the garbage plate, the wastewater contained in the garbage may be scattered around, etc. In addition, it is not preferable, and preparing garbage collection vehicles according to the type of garbage and using them properly according to the type of garbage complicates the maintenance and management of the garbage collection vehicle and causes a rise in cost. There is.

As a countermeasure, the present applicant proposed a refuse collection vehicle in Japanese Patent Application No. 9-63556.

This garbage collection vehicle is provided with a rotary plate rotatably provided in the garbage input box and for scraping up the trash introduced into the garbage input box, between a swing front end position and a swing rear end position. A push plate that swings and lifts the dust scraped up by the rotating plate into the dust storage box, and can be moved between a storage position stored in the push plate and a projecting position that projects forward from the push plate. It has an auxiliary pressing plate supported by the pressing plate, and a fixing device for selectively fixing the auxiliary pressing plate to one of the storage position and the protruding position.

To load low-volume garbage such as kitchen garbage, an auxiliary pushing plate is fixed to a storage position, and the trash put into the garbage input box is scraped up by the rotary plate, and scraped by the rotary plate. The raised dust is efficiently loaded into the dust 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 a projecting position protruding forward of the pushing plate, and the dust put in the dust loading box is removed. After the dust is crushed and reduced by the rotating plate and the lower surface of the auxiliary pushing plate protruding from the pushing plate at the swinging retreat position, the dust is crushed by the pushing plate that swings to the swing front end position to efficiently remove the dust. It is often loaded in a garbage storage box, and it is possible to efficiently load different garbage, such as low-volume garbage such as kitchen garbage and high-volume garbage such as empty cans and plastic bottles, and share a garbage collection vehicle. To facilitate the maintenance of the garbage trucks.

[0016]

According to the above-mentioned prior art, different kinds of trash such as low-volume trash such as kitchen trash and bulky trash such as empty cans and PET bottles which are sorted in advance are efficiently loaded. This makes it possible to share a garbage truck and simplify maintenance and management of the garbage truck.

However, irrespective of the type of trash, such as low-volume trash such as kitchen garbage and high-volume trash such as empty cans and PET bottles, the trash is pushed due to the reaction force acting on the push plate. When the hydraulic pressure of the cylinder rises to a predetermined value, the hydraulic pressure of the discharge cylinder is reduced according to the signal, and the discharge plate is retracted while maintaining the balance with the pressing pressure by the pressing plate. Even in bulky dust such as empty cans and PET bottles that do not require or hardly need to be compressed by the plate and the discharge plate, the discharge plate is pushed uniformly and after the hydraulic pressure of the cylinder rises to a predetermined value,
Because the hydraulic pressure of the discharge cylinder is lowered and retreated,
Even dust that does not require or is hardly required to be compressed by the pushing plate and the discharge plate is uniformly compressed and loaded into the dust storage box, which may affect an efficient dust loading operation.

Accordingly, an object of the present invention, which is made in view of the above points, is to load different types of trash such as separated low-volume trash such as kitchen garbage and high-volume trash such as empty cans and PET bottles. It is an object of the present invention to provide a refuse collection vehicle that can improve efficiency.

[0019]

According to a first aspect of the present invention, there is provided a rotary plate rotatably provided in a dust input box to scrape dust input into the dust input box. A push plate that swings between the swing front end position and the swing rear end position to load the dust scraped up by the rotary plate into the dust storage box; and a storage position and a push stored in the push plate. A loading device having an auxiliary pushing plate selectively held at a projecting position protruding forward of the plate; and a retreating direction which is disposed opposite to the pushing plate and approaches the loading device and is separated from the forward direction. A discharge device having a discharge plate movably supported in the dust container box, wherein the push plate retracts the discharge plate when a dust pressing reaction force of a predetermined value or more is exerted, and the auxiliary pressing plate protrudes from the press plate. When the rotating plate is in a state where Wherein the allowed to retract the discharge plate before use.

Therefore, for loading of garbage such as kitchen garbage having a relatively low bulk, the auxiliary pushing plate is stored and fixed in the pushing plate, and the dust put in the dust loading box is scraped up by the rotating plate. The dust scraped up by the rotating plate is loaded into the dust container box by the pushing plate, and when the pushing reaction force of the dust acts on the pushing plate for a predetermined time or more, the discharging plate automatically retreats. After being compressed, it is stored in the garbage storage box to increase the 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 dust put in the dust input box is scraped up by a rotating plate. The garbage is crushed and reduced in volume by the lower surface of the push plate and the rotating plate, loaded into the garbage storage box by the push plate, and the discharge plate is automatically retracted by the garbage when the scraping reaction force exceeds the predetermined value. This allows the dust to be loaded into the dust storage box even during the dust scraping process by the rotating plate, and the pushing force required for pushing by the pushing plate is reduced, so that the dust loading operation is smooth. It is performed efficiently.

According to a second aspect of the present invention, the discharge device has a discharge cylinder which expands and contracts by the supplied hydraulic pressure to move the discharge plate forward and backward, and when the pushing plate has a dust pushing reaction force exceeding a predetermined value. Drain the oil in the discharge cylinder, retract the discharge plate, and discharge the oil in the discharge cylinder when the rotating plate lifts the dust up to a predetermined value or more while the auxiliary push plate protrudes from the push plate. The discharge plate is retracted, and the operation of loading dust is smoothly and efficiently performed by controlling the hydraulic pressure of the discharge cylinder as in the first aspect of the present invention.

According to a third aspect of the present invention, the loading device has a pushing cylinder that expands and contracts by the supplied oil pressure to swing the pushing plate, and a hydraulic motor that rotates the rotating plate by rotating by the supplied oil pressure. When the oil pressure acting on the push cylinder, which increases in response to the dust pushing reaction force, is greater than a predetermined value, the oil in the discharge cylinder is discharged to retreat the discharge plate, and the auxiliary push plate protrudes from the push plate. When the hydraulic pressure acting on the hydraulic motor that increases in response to the dust-removing reaction force is higher than a predetermined value, the oil in the discharge cylinder is discharged and the discharge plate is retracted to facilitate the work of loading dust and improve efficiency. Is obtained.

According to a fourth aspect of the present invention, the discharge cylinder is connected to the drain pipe via a first connection pipe interposed with a first pilot valve which opens when the push cylinder operates with a hydraulic pressure of a predetermined value or more. A first branch that branches off from the first connection pipe line upstream of the first pilot valve and is closed when the auxiliary push plate is housed in the push plate and opened when the auxiliary push plate protrudes from the push plate; A second valve that opens when a hydraulic pressure of a predetermined value or more is applied to the solenoid valve and the hydraulic motor.
It has a second connection line provided with a pilot valve and connected to the drain line.

According to a fifth aspect of the present invention, there is provided a drain pipe through a third connection pipe which interposes a third pilot valve which opens when the hydraulic pressure of a predetermined value or more acts on the pushing cylinder. A second solenoid valve that is connected to the passage and that is branched from the third connection pipe via the second solenoid valve at an upstream side of the third pilot valve and that opens when the hydraulic motor operates at a hydraulic pressure equal to or greater than a predetermined value. A fourth connecting pipe connected to the pipe, wherein the second solenoid valve closes the third connecting pipe in a state where the auxiliary pushing plate is housed in the pushing board and the fourth connecting pipe; And the third connecting pipe is communicated and the fourth connecting pipe is closed in a state in which the third connecting pipe is communicated with the auxiliary pressing plate protruding from the pressing plate, and the invention according to claim 3 is provided. The pipeline and solenoid valve, pilot valve etc. It is intended to more effectively achieved.

[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 the drawings.

FIG. 1 is a side view of an essential part for explaining the outline of a dust loading device provided in a dust collection vehicle. Reference numeral 1 denotes a dust storage box provided in the center of the vehicle. The upper end of the dust bin 2 is swingably supported at the rear of the container through a bracket, and the dust bin 2 is accommodated by expansion and contraction of a lift cylinder 35 provided between the dust bin 1 and the dust bin 2. It is configured so that it swings with respect to the box 1 and the lower end of the dust input box 2 is locked to the rear end of the floor surface 1a of the dust storage box 1 by a securing device 3 operated by a lock cylinder 31. .

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 arranged along the vehicle width direction in the trash insertion box 2, and a lower portion of the push plate support shaft 11. An auxiliary push plate 14 pivotally supported by the push plate 12 via an auxiliary push plate support shaft 13 arranged in parallel with the push plate 12, and the dust input box 2 along the vehicle width direction at a position below the push plate 12. A rotating plate 16 supported by the rotating shaft 15 provided and driven to rotate by a hydraulic motor 33.

The push plate 12 has a substantially rectangular auxiliary push plate storage portion 12a which is open along the vehicle width direction so as to receive the auxiliary push plate 14, and is formed 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.

As shown in the enlarged cross-sectional view of the main part of FIG. 2A and FIG.
The upper end of the auxiliary pressing plate 14 is swingably 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 saw-tooth shape. A pressure receiving portion 15a having a large number of protrusions and a dust movement restricting member 15b projecting downward from the pressure receiving portion 15a along the lower edge of the auxiliary pressing plate 14 are provided.

Between the pressing plate 12 and the auxiliary pressing plate 14,
As shown in FIG. 2A, the auxiliary push plate 14 pivotally supported by the auxiliary push plate support shaft 13 is
2 is stored in the auxiliary push plate storage portion 12a substantially continuously with the front surface 12b of the push plate 12, and FIG.
As shown in (b), there is provided an auxiliary pressing plate fixing device (not shown) for selectively positioning and fixing the pressure receiving portion 15a of the auxiliary pressing plate 14 to a protruding position protruding forward from the front surface 12b of the pressing plate 12. In addition, a protrusion detection switch (not shown) for detecting the protrusion of the auxiliary push plate 14 is provided.

On the other hand, the discharge device 20 disposed in the trash storage box 1 has a panel-shaped discharge plate 23 supported on the floor surface 1a so as to be horizontally movable and facing the push plate 12; The discharge plate 23 is configured to move horizontally by the expansion and contraction of a discharge cylinder 34 provided between the dust container 23 and the front part in the refuse storage box 1.

FIG. 3 shows a hydraulic circuit 40 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 symbol 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, discharge cylinder 32, hydraulic motor 3 via V5
3, connected to the pushing cylinder 34 and the 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 check valve CV1 is connected between the hydraulic supply pipe A and the first main switching valve V1 and is connected between the hydraulic supply pipe A and the first main switching valve V1 by a connection pipe A1 interposed with the main switching valve V1. A connection pipe B1 connected to the extension-side oil chamber 31a of the cylinder 31 is connected to a drain pipe B provided with a filter F and opened to the hydraulic tank T via a first main switching valve V1. ing.

Then, the locking device 31 is contracted by switching the first main switching valve V1 to thereby lock the locking device 3.
The dust input box 2 is fastened to the rear end of the floor 1a of the dust storage box 1 by the
Is released.

The hydraulic pump P and the contraction-side oil chamber 32b of the discharge cylinder 32 are connected by a connecting line A2 which branches off from the hydraulic supply line A and interposes a second main switching valve V2.
The extension-side oil chamber 32a of the discharge cylinder 32 and the second main switching valve V
2 is connected by a connection pipe line 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 fourth main switching valve V4 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, and are connected to the contraction-side oil chamber 35b of the lift cylinder 35. The fifth main switching valve V5 is connected to the drain line B and tilts the refuse input box 2 by the switching operation of the fifth main switching valve V5. However, the fifth main switching valve V5 is not related to the main part of the present invention. Is omitted.

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 first pilot valve PV1 is interposed, and the first pilot valve PV1 is connected to a fourth main switching valve V4 and an extension side oil of the pushing cylinder 34. Connecting line A between the chamber 34a
4 and a pilot line P1, and the hydraulic pressure between the fourth main switching valve V4 and the push cylinder 34 is equal to or more than a predetermined value,
In other words, when the hydraulic pressure of the extrusion cylinder 34 is equal to or more than a predetermined value, the first
The pilot valve PV1 is configured to be opened.

Further, the first connection pipe C1 is provided with a second connection pipe C2 branched from the upstream side of the first pilot valve PV1 and arranged in parallel with the first connection pipe C1. C2
A first solenoid valve SV1 that opens the second connection conduit C2 when the above-mentioned protrusion detection switch (not shown) that detects the protrusion of the auxiliary push plate 14 detects the protrusion of the auxiliary push plate 14;
The second pilot valve PV2 is interposed.

The second pilot valve PV2 is connected via a connection pipe B3 and a pilot pipe P2 between the third main switching valve V3 and the forward supply port 33b of the hydraulic motor 33, and is connected to the third main switching valve V3. The second pilot valve P is opened when the hydraulic pressure between the switching valve V3 and the hydraulic motor 33 is equal to or more than a predetermined value, in other words, the hydraulic pressure required for normal rotation of the hydraulic motor 33 is equal to or more than the predetermined value.
V2 is interposed in the connection conduit C2.

Further, a relief valve Vr is provided between the supply line A and the drain line B, and between the contraction side oil chamber 32b of the discharge cylinder 32 and the drain line B in the connection line A2. The check valves CV2 for preventing the flow of the hydraulic pressure from the connection pipe line A2 side are connected to the connection pipes.

Next, the operation of the refuse loading device of the refuse 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 10 and the discharging device 20.

As shown in FIG. 2 (a), prior to the insertion of dust into the dust input box 2, the auxiliary push plate 14 pivotally supported by the push plate 12 by the auxiliary push plate support shaft 13 in advance, as shown in FIG. The front surface 14b of the auxiliary press plate 14 is inserted into the auxiliary press plate storage portion 12a formed on the press plate 12 and the front surface 12b of the press plate 12
Is fixed to the storage position where it is stored so as to be substantially continuous with the auxiliary pressing plate fixing device.

The auxiliary pressing plate 14 is used as the auxiliary pressing plate storage unit 1.
In the state shown in FIG. 2A housed in the inside 2a, the protrusion detection switch detects that the auxiliary push plate 14 is in the housed position, and the first solenoid valve SV1 makes the first connection as shown in FIG. The pipe C1 is maintained in a closed state.

On the other hand, the discharge cylinder 34 of the discharge device 20 disposed 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. 3, the connection lines A2 and B2 are closed, and the hydraulic pressure from the hydraulic pump P is switched to the position for supplying the connection line B3 and is maintained.

Then, as shown in FIG.
In the state where the leading end of the dust container 6 is located at the rotating plate position I at the start of loading and substantially coincides with the rear end of the floor surface 1a of the garbage storage box 1, and the pushing plate 12 is stopped at the swinging front end position, the garbage is discharged from the input port. The loading device 10 is operated by operating the operation switch (not shown) of the operation panel (not shown).

By operating the operation switch on the operation panel, the third main switching valve V3 is switched so that the hydraulic pressure from the hydraulic pump P is supplied to the forward rotation-side supply port 33b of the hydraulic motor 33, and the hydraulic motor 33 rotates forward. The rotation shaft 15 is driven to rotate, and the rotation plate 16 rotates.

When the rotary plate 16 reaches the rotary plate position II at the start of pushing back of the push plate as shown in FIG. 4 (b), the signal is input to the control device, and the fourth main switching valve V4 is activated according to the instruction from the control device. Hydraulic pressure is supplied to the contraction side oil chamber 34a of the push cylinder 34 via the switching connection line A3, 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 further rotates and reaches the rotary plate position III upon completion of the return of the push plate as shown in FIG. 4 (c), the push plate 12 swings to the swing rear end position, and the fourth main member moves. The switching valve V4 is switched as shown in FIG. 3, and 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. It is held at the 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 by the rotary plate 16, and the tip of the rotary plate 16 is placed on the floor 1 a of the dust storage box 1. When the loading start rotating plate position I which substantially coincides with the rear end is reached, the signal is input to the control device, and the third main switching valve V3 is switched as shown in FIG. 3 main switching valve V3 and hydraulic motor 33
Connection lines A3, B3 between the hydraulic motor 3
3 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 according to an instruction from the control device, 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. As shown in FIG. 4E, the push plate 12 located at the end position of the swing is swung to the end position of the swing, and the dust on the rotary plate 16 scraped up by the rotary plate 16 is discharged to the discharge plate 23 of the discharge device 20. While being compressed by the pressing plate 12 and being pushed into the dust container 1, the fourth main switching valve V 4 is switched as shown in FIG. 3 and the connection conduit between the fourth main switching valve V 4 and the pushing cylinder 34. A4 and the connection line B4 are closed, the contraction of the push cylinder 34 is stopped, and the push plate 12 returns to the state shown in FIG.

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

In the dust pushing process in which the pushing plate 12 swings from the swinging rear end position to the swinging front end position, if a large reaction force due to dust acts on the pushing plate 12, that is, a dust pushing reaction force, the fourth main switching is performed. Valve V4 and extension-side oil chamber 34a of push cylinder 34
The hydraulic pressure in the connection pipeline A4 that connects the two rises according to the dust pushing reaction force, and when the hydraulic pressure reaches a predetermined value, the pressure in the pilot pipeline P1 increases.

Then, the first pilot valve PV1 is opened, the oil in the first connection pipe C1 returns to the oil tank T via the drain pipe B, and the discharge cylinder 32 is in a contractible state, and the dust is removed. The discharge plate 23 is slightly retracted by the force.

The retraction of the discharge plate 23 is continued as long as the pressure in the first connection pipe C1, that is, the oil chamber 34a on the extension side of the pushing cylinder 34 is higher than the set pressure of the first pilot valve PV1. The pilot valve PV1 is closed and stopped.

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 plate 23 automatically moves backward. Therefore, the refuse is compressed in the refuse storage box 1 after being strongly compressed, thereby increasing the storage efficiency.

Next, 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 10 and the discharging device 20. .

Prior to the insertion of dust into the dust input box 2, the auxiliary push plate 14 supported by the push plate 12 by the auxiliary push plate support shaft 13 is previously pushed 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 pushing plate storage portion 12a, and is fixed to the projecting state by the auxiliary pushing plate fixing device.

The auxiliary pressing plate 14 is used as the auxiliary pressing plate housing 1
In the state where the auxiliary push plate 14 is in the protruding position in the state where the auxiliary push plate 14 is protruded from the inside of the second solenoid valve 2a, the first solenoid valve SV1 opens the first connection pipe C1 as shown in FIG. Is maintained.

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 located substantially at the rear end on the floor 1a, and the second main switching valve V2
Is switched to a position where the connection pipes A2 and B2 are closed and the hydraulic pressure from the hydraulic pump P is supplied to the connection pipe B3 as shown in FIG.

Then, as shown in FIG.
In the state where the leading end of the dust container 6 is located at the rotating plate position I at the start of loading and substantially coincides with the rear end of the floor surface 1a of the garbage storage box 1, and the pushing plate 12 is stopped at the swinging front end position, the garbage is discharged from the input port. The loading device 10 is operated by operating the operation switch (not shown) of the operation panel (not shown).

By operating the operation switch on the operation panel, 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 time of starting the return of the pushing plate shown in FIG. 6B, a signal is input to the control device, and the fourth main switching valve V is supplied in accordance with an instruction from the control device.
4 is switched, and the hydraulic pressure is supplied to the contraction side oil chamber 34a of the push cylinder 34 via the connection pipe line B3.
Is contracted, and the push plate 12 at the swing front end position 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. This effect of preventing the backflow of dust is remarkable when dust such as a bulky empty can or plastic bottle is pushed into the dust storage box 1 by the push plate 12 or the like and loaded.

When the rotating plate 16 rotates while scraping up the dust put into the dust input box 2 and reaches the rotating plate position III at the time of completion of the return of the pushing plate shown in FIG. 6C, the pushing plate 12 swings. Swinging to the rear end position, the fourth main switching valve V4 is switched as shown in FIG.
The connection lines A4, B4 between
4 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 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 rotary plate 16 to be crushed, the dust moves from the front end of the pressure receiving portion 15a to the dust 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. Further, at the time of crushing, for example, a PET bottle or the like in which air is sealed inside by a cap or the like is broken by being pierced by a large number of projections formed in the pressure receiving portion 15a so as to protrude in a sawtooth shape, and is easily crushed and reduced in volume. .

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.
Connection lines A3, B3 between the hydraulic motor 3
3 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 control device, 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. 6E, the pushing plate 12 located at the end position of the swinging operation is swung to the end position of the swinging end position, and the dust on the rotating plate 16 scraped up by the rotating plate 16 is discharged to the discharge plate 23 of the discharge device 20. The pressurizing plate 12 is pressed into the refuse storage box 1 while being compressed by the pressing plate 12, and the fourth main switching valve V 4 is switched as shown in FIG. 5 to connect the fourth main switching valve V 4 to the pressing cylinder 34. A4 and B4 are closed, the contraction of the push cylinder 34 is stopped, and the push plate 12 returns to the state shown in FIG.

By repeating the operations shown in FIGS. 6 (a) to 6 (e), the refuse which has been continuously put into the refuse input box 2 from the input port is pushed into the refuse storage box 1 sequentially and stored.

When a reaction force due to dust, that is, a dust scraping reaction force acts on the rotating plate 16 in the dust scraping process by the rotating plate 16, the third main switching valve V3 and the forward rotation supply port 33b of the hydraulic motor 33 are connected. The oil pressure in the connecting pipe line B3 to be connected rises in accordance with the dust scraping reaction force, and when the oil pressure reaches a predetermined value, the pressure in the pilot pipe line P2 rises.

Then, the second pilot valve PV2 is opened, and the oil in the second connection line C2 returns to the oil tank T via the first connection line C1 and the drain line B, and the discharge cylinder 34
Can be contracted, and the discharge plate 23 is pushed back by the dust loaded in the dust storage box 1 as the dust is scraped up by the rotary plate 16 prior to the pushing of the dust by the pushing plate 12.

The retreat of the discharge plate 13 is continuously performed as long as the pressure supplied to the second connection pipe C2, that is, the pressure supply port 33b of the hydraulic motor 33 is higher than the set pressure of the second pilot valve PV2. When it becomes low, the second pilot valve PV2
Is closed and stopped. Therefore, if the reaction force of the dust increases to a predetermined value or more when the dust is scraped up by the rotating plate 16, the discharge plate 13 automatically retreats.

Further, similarly to the above, when a reaction force due to dust acts in the dust pushing process in which the push plate 12 swings from the swing rear end position to the swing front end position, the fourth main switching valve V 4 and the push cylinder 34 are moved. When the oil pressure in the connection line A4 connecting the extension side oil chamber 34a rises and reaches a predetermined value, the pilot line P1
The pressure inside rises, the first pilot valve PV1 is opened, and the discharge cylinder 34 is in a contractible state. When the discharge plate 13 is retracted, the pressure of the extension-side oil chamber 34a of the pushing cylinder 34 is increased by the first pilot valve PV1. The first pilot valve PV1 is closed and stopped when the pressure becomes higher than the set pressure.

Therefore, if a reaction force of a predetermined value or more due to dust acts on the rotating plate 16 in the process of scraping the dust by the rotating plate 16 prior to pushing the dust into the dust storage box 1 by the pushing plate 12, the dust causes the discharging plate 23. Retreats,
In the process of scraping dust by the rotating plate 16, dust can be loaded into the dust storage box 1, and the pushing force required for pushing by the pushing plate 12 can be reduced. The work of loading garbage is performed smoothly and efficiently.

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

Hereinafter, the present embodiment will be described with respect to a hydraulic circuit which has the same basic configuration as the refuse collection vehicle in the first embodiment and is different from the first embodiment. FIG. 7
Also, in FIG. 8, the same reference numerals are given to portions corresponding to FIG. 3 and FIG. 5, and detailed description of overlapping portions will be omitted.

FIGS. 7 and 8 show the lock cylinder 3
1, a hydraulic circuit 50 for controlling the operation of each hydraulic device such as a discharge cylinder 32, a hydraulic motor 33, a pushing cylinder 34, and a lift cylinder 35 is shown. 7 and 8
In FIG. 5, the same reference numerals are given to the portions corresponding to FIGS. 3 and 5, and the detailed description of the overlapping portions will be omitted.

In the hydraulic circuit 50, the extension-side oil chamber 32a of the discharge cylinder 32 is connected to the drain pipe B by a third connection pipe C3 interposed by a third pilot valve PV3. The valve PV3 is connected by a connecting line A4 between the fourth main switching valve V4 and the extension side oil chamber 34a of the pushing cylinder 34 and the pilot line P3, and is connected between the fourth main switching valve V4 and the pushing cylinder 34. The configuration is such that the third pilot valve PV3 is opened when the oil pressure is equal to or higher than a predetermined value, in other words, when the oil pressure of the push cylinder 34 is equal to or higher than the predetermined value.

Further, a third solenoid valve SV2 is provided between the discharge cylinder 32 upstream of the third pilot valve PV3 and the third pilot valve PV3.
A fourth connection pipe C4, which can be selectively switched between the third connection pipe C3 and the oil path through the third connection pipe C3, is arranged side by side so as to bypass the third pilot valve PV3. 4
A pilot valve PV4 is interposed.

The fourth pilot valve PV4 is connected via a connection line B3 and a pilot line P4 between the third main switching valve V3 and the forward supply port 33b of the hydraulic motor 33, and is connected to the third main switching valve V3. The fourth pilot valve PV4 is opened when the oil pressure between the switching valve V3 and the hydraulic motor 33 is equal to or more than a predetermined value, in other words, when the oil pressure supplied to the forward rotation supply port 33b of the hydraulic motor 33 is equal to or more than the predetermined value. It is configured.

The third connection pipe C3 and the fourth connection pipe C4
Solenoid valve SV2 for selectively switching the oil passage
When the protrusion detection switch detects that the auxiliary push plate 14 is in the storage position where the auxiliary push plate 14 is stored in the auxiliary push plate storage portion 12a, as shown in FIG.
When the protruding detection switch detects a protruding position where the auxiliary pressing plate 14 protrudes from the inside of the auxiliary pressing plate storage portion 12a, the position of the auxiliary pressing plate 14 is detected as shown in FIG.
As shown in (5), the switching is selectively controlled so that an oil passage on the fourth pilot valve PV4 side is formed. .

Next, the operation of the refuse loading apparatus of the refuse 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 10 and the discharging device 20.

As shown in FIG. 2 (a), prior to the input of dust into the dust input box 2, the auxiliary push plate 14 pivotally supported by the push plate 12 by the auxiliary push plate support shaft 13 in advance, as shown in FIG. It is stored in the auxiliary pressing plate storage section 12a formed on the pressing plate 12, and is fixed by the auxiliary pressing plate fixing device.

This auxiliary pressing plate 14 is used as the auxiliary pressing plate storage 1
In the state accommodated in 2a, the second solenoid valve SV2 is maintained in a state in which the fourth connection pipe C4 is closed as shown in FIG. 7 according to a signal from the protrusion detection switch.

On the other hand, the discharge cylinder 34 of the discharge device 20 disposed 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. 3, the connection lines A2 and B2 are closed and the hydraulic pressure from the hydraulic pump P is switched to the position for supplying the connection line B3.

The push plate 12 and the rotary plate 16 are formed by the third main switching valve V3 and the fourth main switching valve V4, which are switched according to the operation switch of the operation panel and the instruction from the control device in the same manner as in the first embodiment. 4 (a) to 4 (e) in FIG.
By repeatedly performing the operations shown in (1) and (2), the refuse that has been continuously put into the refuse input box 2 from the input port is pushed into the refuse storage box 1 sequentially and stored.

When a large reaction force due to dust acts on the push plate 12 during the dust pushing process in which the push plate 12 swings from the swing rear end position to the swing front end position, the fourth main switching valve V4 and the push cylinder are moved. The oil pressure in the connection pipeline A4 connecting the extension oil chamber 34a to the extension side oil chamber 34a increases, and when the oil pressure reaches a predetermined value, the pressure in the pilot pipeline P3 increases. Then the third
The pilot valve PV3 is opened, the oil in the third connection line C3 returns to the oil tank T via the drain line B, and the discharge cylinder 34 is in a contractible state. Retreat slightly.

The retreating of the discharge plate 13 is continuously performed as long as the pressure in the connection pipe line C3 is higher than the set pressure of the third pilot valve PV3. When the pressure decreases, the third pilot valve PV3 is closed and stopped. Therefore, 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 plate 13 automatically retreats. Therefore, the refuse is strongly compressed by the discharge plate 23 and the pushing plate 12 and then stored in the refuse storage box 1, thereby increasing the storage efficiency.

Next, 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 10 and the discharging device 20. .

As in the case of the first embodiment, before the dust is thrown into the dust throwing box 2, the auxiliary pushing plate 14 is previously
As shown in (b), the pressure receiving portion 15a provided on the lower surface of the auxiliary pressing plate press 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 housing 1
In the state where the auxiliary push plate 14 is in the protruding position in the state where the auxiliary push plate 14 is protruded from the inside of the second solenoid valve SV, the second solenoid valve SV2 closes the third connection conduit C3 as shown in FIG. Then, the state where the oil passage is formed on the connection pipe line C4 side is maintained.

On the other hand, the discharge cylinder 32 of the discharge device 20 disposed 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
Is switched to a position where the connection lines A2 and B2 are closed as shown in FIG. 7 and the hydraulic pressure from the hydraulic pump P is supplied to the connection line B3.

The push plate 12 and the rotary plate 16 are operated by the third main switching valve V3 and the fourth main switching valve V4, which are switched by the operation switch of the operation panel and the instruction from the control device in the same manner as in the first embodiment. 6 (a) to (e) of FIG.
By repeatedly performing the operations shown in (1) and (2), the dust put in the dust input box 2 continuously from the input port is sequentially crushed and reduced in volume, and pushed into the dust storage box 1 to be stored.

When a reaction force due to dust acts on the rotating plate 16 in the process of scraping the dust by the rotating plate 16, the third main switching valve V
The hydraulic pressure in the connection pipeline B3 connecting the hydraulic motor 3 and the forward rotation supply port 33b of the hydraulic motor 33 increases, and when the hydraulic pressure reaches a predetermined value, the pressure in the pilot pipeline P4 increases. Then, the fourth pilot valve PV4 is opened and the discharge cylinder 32
The oil in the fourth connection pipe C4 connected via the extension side oil chamber 32a and the second solenoid valve SV2 returns to the oil tank T via the drain pipe B, and the discharge cylinder 34 is in a contractible state. Prior to the pushing of the dust by the pushing plate 12, the dust is pushed up by the rotating plate 16 and loaded into the dust storage box 1 so that the discharge plate 23 is pushed back and retreated.

Therefore, when a reaction force of a predetermined value or more due to dust acts on the rotating plate 16 in the process of scraping the dust by the rotating plate 16 prior to pushing the dust into the dust storage box 1 by the pushing plate 12, the discharging plate 23 causes the dust to be removed. From retreating by
In the process of scraping dust by the rotating plate 16, dust can be loaded into the dust storage box 1, and the pushing force required for pushing by the pushing plate 12 can be reduced. The work of loading garbage is performed smoothly and efficiently.

[0103]

According to the garbage collection vehicle according to the present invention described above, when loading garbage such as kitchen garbage, which has been sorted in advance and is relatively low in bulk, the auxiliary pressing plate is stored and fixed in the auxiliary pressing plate. The dust put into the dust bin is scraped up by the rotating plate, the dust scraped up by the rotating plate is loaded into the dust container box by the pushing plate, and automatically when the pushing reaction force of the dust on the pushing plate exceeds a predetermined value. By the retraction of the discharge plate,
After the dust is strongly compressed by the discharge plate and the pushing plate, the dust is stored in the dust storage box, and the storage efficiency is increased.

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 dust put in the dust input box is scraped up by a rotating plate. The dust is crushed and reduced in volume by the lower surface of the push plate and the rotating plate, loaded into the dust storage box by the push plate, and when the rotating plate is subjected to more than a predetermined reaction force, the discharge plate is automatically retracted by the dust. This allows the dust to be loaded into the dust storage box even during the dust scraping process by the rotating plate, and reduces the pushing force required for pushing by the pushing plate. It is carried out smoothly and efficiently, and the efficiency of loading work of loading different types of garbage, such as separated bulky garbage such as kitchen garbage and bulky garbage such as empty cans and PET bottles, is obtained. One in which large made to contribute to the efficiency of garbage collection work by refuse collection vehicles.

[Brief description of the drawings]

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

FIGS. 2A and 2B are schematic explanatory diagrams illustrating the operation of the pressing plate and the auxiliary pressing plate, wherein FIG. 2A is a diagram illustrating a stored state of the auxiliary pressing plate, and FIG. It is.

FIG. 3 is also a hydraulic circuit diagram.

FIG. 4 is an operation explanatory diagram, similarly.

FIG. 5 is also a hydraulic circuit diagram.

FIG. 6 is also an operation explanatory view.

FIG. 7 is a hydraulic circuit diagram illustrating an outline of a second embodiment of the refuse collection vehicle according to the present invention.

FIG. 8 is also a hydraulic circuit diagram.

FIG. 9 is a schematic explanatory view of a conventional refuse collection vehicle.

FIG. 10 is an operation explanatory view of the refuse loading device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dust storage box 2 dust insertion box 10 loading device 12 push plate 14 auxiliary push plate 16 rotating plate 20 discharge device 23 discharge plate 32 discharge cylinder 33 hydraulic motor 34 press cylinder C1 first connection line C2 second connection line C3 Third connection pipe C4 Fourth connection pipe PV1 First pilot valve PV2 Second pilot valve PV3 Third pilot valve PV4 Fourth pilot valve SV1 First solenoid valve SV2 Second solenoid valve B Drain pipe

Claims (5)

[Claims] A dust loading box connected to a rear side of the dust storage box, a loading device for pushing the dust thrown into the dust storage box into the dust storage box, and a loading device disposed in the dust storage box. A dust collection vehicle having a discharge device for discharging dust stored in the dust storage box, a rotary plate rotatably provided in the dust input box and scraping the dust input into the dust input box; A push plate that swings between the swing front end position and the swing rear end position and loads the dust scraped up by the rotating plate into the dust storage box; a storage position and a push plate stored in the push plate A loading device having an auxiliary pushing plate selectively held at a projecting position projecting forward, and a horizontal movement in a retreating direction separated from a forward direction approaching the loading device by being arranged opposite to the pushing plate and approaching the loading device. An exhaust system having an exhaust plate freely supported in a dust container With the device, the push plate retracts the discharge plate at the time of the dust pushing reaction force of a predetermined value or more, and the rotating plate at the time of the dust scraping reaction force of the predetermined value or more with the auxiliary pushing plate protruding from the pushing plate. A refuse collection vehicle characterized by retracting the discharge plate. 2. A discharge device having a discharge cylinder for expanding and retracting a discharge plate by expanding and contracting by a supplied hydraulic pressure, wherein the press plate discharges oil in the discharge cylinder when a dust pushing reaction force exceeding a predetermined value is exerted. When the auxiliary push-in plate protrudes from the push-in plate and the auxiliary push-in plate protrudes from the push-in plate, and the dust in the discharge cylinder is more than a predetermined value and the reaction force acts, the oil in the discharge cylinder is discharged and the discharge plate is retracted. Claim 1.
Garbage truck described in. 3. The loading device has a pushing cylinder that expands and contracts by a supplied oil pressure to swing the pushing plate, and a hydraulic motor that rotates by rotating the supplied plate to rotate the rotating plate. When the hydraulic pressure exceeds the value, the oil in the discharge cylinder is discharged and the discharge plate is retracted, and the hydraulic motor discharges the oil in the discharge cylinder when the hydraulic pressure exceeds the predetermined value with the auxiliary push plate protruding from the push plate. The refuse collection vehicle according to claim 2, wherein the discharge plate is moved backward. 4. The drain cylinder is connected to a drain pipe through a first connection pipe interposed with a first pilot valve which opens when a hydraulic pressure equal to or more than a predetermined value is applied to the pushing cylinder.
A first solenoid valve which branches off from the first connection pipe upstream of the first pilot valve and is closed when the auxiliary push plate is housed in the push plate and opened when the auxiliary push plate protrudes from the push plate. 4. The refuse collection vehicle according to claim 3, further comprising a second connection line connected to the drain line, the second connection line being provided with a second pilot valve that opens when the hydraulic motor operates at a hydraulic pressure equal to or more than a predetermined value. 5. 5. The drain cylinder is connected to a drain pipe through a third connection pipe interposed with a third pilot valve that opens when the pushing cylinder operates at a hydraulic pressure equal to or greater than a predetermined value.
A fourth pilot valve that branches from the third connection line upstream of the third pilot valve via the second solenoid valve and opens when the hydraulic motor operates at a hydraulic pressure equal to or greater than a predetermined value is connected to the drain line. The second solenoid valve has a fourth connection pipe, wherein the third connection pipe is closed and the fourth connection pipe communicates with the auxiliary push plate in a state where the auxiliary push plate is housed in the push plate, and 4. The refuse collection vehicle according to claim 3, wherein the third connection conduit communicates and the fourth connection conduit is closed in a state where the pushing plate protrudes from the pushing plate. 5.