JP6502717B2 - Garbage truck - Google Patents

Description

  The present invention relates to a refuse collection vehicle.

  BACKGROUND ART Dust collection vehicles having a dust loading device driven by a hydraulic device such as a hydraulic cylinder are conventionally known. For example, the hydraulic cylinder is connected to a hydraulic circuit provided with an electromagnetic switching valve, and by switching the electromagnetic switching valve, extension, stop, and contraction of the hydraulic cylinder are controlled.

  By the way, when the refuse collection vehicle is used in a cold region or in winter, the temperature of oil in the hydraulic circuit becomes low. As the temperature decreases, the viscosity of the oil increases. As a result, many time delays may occur from when the solenoid of the solenoid control valve is turned on or off to when the movement of the spool of the solenoid control valve is completed. However, if the movement of the spool takes a lot of time, the hydraulic cylinder may extend or contract beyond the original stop position, which may cause a so-called bottom thrust and abnormal noise.

  Patent Document 1 discloses a technique for preventing such bottom sticking. The dust collection vehicle described in Patent Document 1 includes a limit switch that detects a position before the original stop position of the hydraulic cylinder, and an oil temperature sensor that detects an oil temperature, and the hydraulic cylinder is at the position before the above When it reaches, it is comprised so that a signal may be transmitted to an electromagnetic switching valve, after progress of the predetermined time according to oil temperature. When the oil temperature is low, the predetermined time is set shorter than when the oil temperature is high, and the signal is transmitted to the electromagnetic switching valve earlier. When the viscosity of the oil is high, the spool of the electromagnetic switching valve starts moving earlier, so that bottom sticking is prevented and the generation of abnormal noise is suppressed.

  In addition, in hydraulic equipment that drives heavy objects and the like, there is a problem that abnormal noise is likely to occur when the operation is suddenly stopped or suddenly started. For example, in the hydraulic cylinder, abnormal stop is likely to occur when the extension operation or the contraction operation is suddenly stopped.

  Patent Document 2 discloses a technique for suppressing the generation of such abnormal noise. According to the technique disclosed in Patent Document 2, when the hydraulic cylinder performs extension operation or contraction operation toward the stop position, the discharge amount of the hydraulic pump is reduced before the stop position, and then the hydraulic pump is set to a predetermined amount After the rotation (specifically, three revolutions), the operation of the hydraulic cylinder is switched from the extension operation to the contraction operation or from the contraction operation to the extension operation. Thereafter, when the hydraulic pump rotates a predetermined amount, the discharge amount of the hydraulic pump is returned to the normal discharge amount. As a result, when the operation of the hydraulic cylinder is switched, the expansion / contraction speed of the hydraulic cylinder becomes slower than normal, so that the generation of abnormal noise before and after the operation switching can be suppressed.

Patent No. 3091661 Patent No. 5529610

  The inventor of the present application has considered combining the above-described both techniques in order to further suppress the generation of abnormal noise of a hydraulic cylinder or the like in a dust collection vehicle. However, simply combining the two techniques described above causes the following problems.

  That is, when the above two techniques are simply combined, the limit switch used to determine the timing to transmit the signal to the solenoid switching valve and the limit switch used to determine the timing to decrease the discharge amount of the hydraulic pump are separately used. The problem is that the cost increases due to the increase in the number of parts. In addition, the switching timing of the electromagnetic switching valve based on the oil temperature may not be well matched with the timing of reducing the discharge amount of the hydraulic pump, which may make the control unstable or cause a bottom thrust. Therefore, conventionally, it has been difficult to combine the two techniques without increasing the cost, and it has been difficult to highly suppress both the generation of abnormal noise due to bottom thrust and the generation of abnormal noise accompanying switching of operation.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a hydraulically driven dust loading device, and to switch over between abnormal noise generation and operation due to bottom thrust while suppressing cost increase. An object of the present invention is to provide a refuse collection vehicle capable of highly suppressing both the generation of the accompanying abnormal noise.

  A dust collection vehicle according to the present invention comprises a dust storage box mounted on a chassis, a dust input box having an inlet for dust input and connected to the dust storage box, and the dust input box And a control device for controlling the dust loading device. The dust loading device feeds the dust introduced into the dust storage box to the dust storage box. The dust loading device includes a hydraulic circuit having a hydraulic pump, a sliding cylinder including a hydraulic cylinder connected to the hydraulic circuit, a swing cylinder including a hydraulic cylinder connected to the hydraulic circuit, and the hydraulic circuit A first electromagnetic switching valve provided to the sliding cylinder and connected to the sliding cylinder, a second electromagnetic switching valve provided to the hydraulic circuit and connected to the oscillating cylinder, and attached to the sliding cylinder and A sliding plate that slides in the vertical direction by the expansion and contraction operation of the sliding cylinder, and is attached to the lower end of the sliding plate so as to be able to swing in the vehicle longitudinal direction, and swings in the vehicle longitudinal direction by the expansion and contraction operation of the swingable cylinder. A reversing step in which the compression plate swings backward, a descending step in which the sliding plate slides downward, a compression step in which the compression plate swings forward, and the sliding The board is It is configured to perform the rising step of sliding towards.

In the first invention, in the dust collection vehicle, an oil temperature sensor for detecting the temperature of oil in the hydraulic circuit, and detection that the telescopic position of the sliding cylinder has reached a position before the end of the rising step And a rising limit switch. The control device is configured to reduce the discharge amount of the hydraulic pump from a reference amount when the increase limit switch detects that the expansion and contraction position of the sliding cylinder has reached a position before the end of the raising step. The reduction portion and the expansion / contraction position of the sliding cylinder are set by the oil temperature sensor detected by the oil temperature sensor after being detected by the elevation limit switch that the position has reached a position before the end of the elevation step. A solenoid OFF portion which turns off the solenoid of the first electromagnetic switching valve so as to stop the expansion and contraction of the sliding cylinder when the first predetermined time has passed, and the expansion and contraction position of the sliding cylinder is before the end of the lifting step When a second predetermined time, which is longer than the first predetermined time, has elapsed since it was detected by the rising limit switch that the position of A solenoid ON portion condensation plate is ON the second electromagnetic switching valve solenoid so as to swing the rear of the vehicle body, after the second predetermined time has elapsed in the second electromagnetic switching valve solenoid is ON, And a discharge amount return unit configured to return the discharge amount of the hydraulic pump to the reference amount when a third predetermined time before the end of the reversing step has elapsed.

  According to the first aspect of the invention, at the time of switching from the raising step to the reversing step, the timing at which the solenoid of the electromagnetic switching valve is turned ON / OFF and the timing at which the discharge amount of the hydraulic pump is changed is the same rising limit It is determined using a switch. Since it is not necessary to prepare separate limit switches, it is possible to prevent an increase in cost due to an increase in the number of parts. Further, the switching timing of the electromagnetic switching valve based on the oil temperature and the timing for reducing the discharge amount of the hydraulic pump can be well matched. Therefore, according to the first aspect of the present invention, it is possible to highly suppress both the generation of the abnormal noise due to the bottom thrust and the generation of the abnormal noise accompanying the switching of the operation while suppressing the cost increase.

In the second invention, in the dust collection vehicle, an oil temperature sensor for detecting the temperature of the oil in the hydraulic circuit, and detection that the expansion and contraction position of the rocking cylinder has reached a position before the end of the reversing step Reverse limit switch. The control device is configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the reverse limit switch that the extension / contraction position of the rocking cylinder has reached a position before the end of the reverse step. The reduction portion and the expansion / contraction position of the rocking cylinder are set by the inversion temperature switch after being detected by the inversion limit switch before reaching the end position of the inversion step, and then set according to the oil temperature detected by the oil temperature sensor A solenoid OFF portion which turns off the solenoid of the second electromagnetic switching valve so as to stop the expansion and contraction of the rocking cylinder when the first predetermined time has passed, and the expansion and contraction position of the rocking cylinder is before the end of the reverse process. When a second predetermined time longer than the first predetermined time elapses since it is detected by the reverse limit switch that the position of the vehicle is reached, A solenoid ON unit for ON the first electromagnetic switching valve solenoid as moving plate slides downward, after the second predetermined time has elapsed in the first electromagnetic switching valve solenoid is ON, the And a discharge amount return unit configured to return the discharge amount of the hydraulic pump to the reference amount when a third predetermined time before the end of the lowering step has elapsed.

  According to the second aspect of the invention, at the time of switching from the reversing step to the lowering step, the reverse limit at which the solenoid switching valve solenoid ON / OFF timing and the hydraulic pump discharge amount change timing is the same. It is determined using a switch. Since it is not necessary to prepare separate limit switches, it is possible to prevent an increase in cost due to an increase in the number of parts. Further, the switching timing of the electromagnetic switching valve based on the oil temperature and the timing for reducing the discharge amount of the hydraulic pump can be well matched. Therefore, according to the second aspect of the present invention, it is possible to highly suppress both the generation of the abnormal noise due to the bottom thrust and the generation of the abnormal noise accompanying the switching of the operation while suppressing the cost increase.

In a third aspect of the invention, in the dust collection vehicle, an oil temperature sensor for detecting the temperature of oil in the hydraulic circuit, and detection that the telescopic position of the sliding cylinder has reached a position before the end of the lowering step And a lowering limit switch. The control device is configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the lower limit switch that the telescopic position of the sliding cylinder has reached a position before the end of the lowering step. The reduction portion and the expansion / contraction position of the sliding cylinder are set according to the oil temperature detected by the oil temperature sensor after being detected by the downward limit switch that the position before the end of the descending step has reached a position And a solenoid OFF portion for turning off the solenoid of the first electromagnetic switching valve so as to stop the expansion and contraction of the sliding cylinder when the first predetermined time has passed, and the expansion and contraction position of the sliding cylinder is before the end of the lowering step. The second predetermined time, which is longer than the first predetermined time, elapses after the lower limit switch is detected to have reached the position of A solenoid ON portion condensation plate is ON the second electromagnetic switching valve solenoid so as to swing the front of the vehicle body, after the second predetermined time has elapsed in the second electromagnetic switching valve solenoid is ON, And a discharge amount return unit that returns the discharge amount of the hydraulic pump to the reference amount when a third predetermined time before the compression process ends .

  According to the third aspect of the invention, when switching from the descent step to the compression step, the descent limit at which the solenoid switching valve solenoid ON / OFF timing and the hydraulic pump discharge amount change timing are the same. It is determined using a switch. Since it is not necessary to prepare separate limit switches, it is possible to prevent an increase in cost due to an increase in the number of parts. Further, the switching timing of the electromagnetic switching valve based on the oil temperature and the timing for reducing the discharge amount of the hydraulic pump can be well matched. Therefore, according to the third aspect of the present invention, it is possible to highly suppress both the generation of the abnormal noise due to the bottom thrust and the generation of the abnormal noise accompanying the switching of operation while suppressing the cost increase.

In a fourth aspect of the present invention, in the dust collection vehicle, an oil temperature sensor for detecting the temperature of oil in the hydraulic circuit, and detection that the expansion and contraction position of the rocking cylinder has reached a position before the end of the compression process And a compression limit switch. The control device is configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the compression limit switch that the expansion and contraction position of the rocking cylinder has reached a position before the end of the compression process. The reduction unit and the expansion / contraction position of the rocking cylinder are set by the compression temperature limit switch according to the oil temperature detected by the oil temperature sensor after it is detected by the compression limit switch A solenoid OFF portion for turning off the solenoid of the second electromagnetic switching valve so as to stop the expansion and contraction of the rocking cylinder when the first predetermined time has passed, and the expansion and contraction position of the rocking cylinder is before the end of the compression process The second predetermined time, which is longer than the first predetermined time, elapses after the compression limit switch is detected to have reached the position of A solenoid ON unit for ON the first electromagnetic switching valve solenoid as moving plate slides upwardly, after the second predetermined time has elapsed in the first electromagnetic switching valve solenoid is ON, the And a discharge amount return unit configured to return the discharge amount of the hydraulic pump to the reference amount when a third predetermined time before the end of the rising step has elapsed.

  According to the fourth aspect of the invention, at the time of switching from the compression process to the ascending process, the compression limit at which the solenoid of the electromagnetic switching valve is turned ON / OFF and the timing at which the discharge amount of the hydraulic pump changes It is determined using a switch. Since it is not necessary to prepare separate limit switches, it is possible to prevent an increase in cost due to an increase in the number of parts. Further, the switching timing of the electromagnetic switching valve based on the oil temperature and the timing for reducing the discharge amount of the hydraulic pump can be well matched. Therefore, according to the fourth aspect of the present invention, it is possible to highly suppress both the generation of the abnormal sound due to the bottom thrust and the generation of the abnormal sound accompanying the switching of the operation while suppressing the cost increase.

  Another dust collection vehicle according to the present invention includes a dust storage box mounted on a chassis, a dust input box having an insertion port into which the dust is input, and connected to the dust storage box, and the dust A dust loading device for feeding dust introduced into a charging box to the dust storage box, and a control device for controlling the dust loading device. The dust loading device includes: a hydraulic circuit having a hydraulic pump; a pushing cylinder including a hydraulic cylinder connected to the hydraulic circuit; a hydraulic motor connected to the hydraulic circuit; A first electromagnetic switching valve connected to a cylinder, a second electromagnetic switching valve provided in the hydraulic circuit and connected to the hydraulic motor, and the pushing cylinder attached to the pushing cylinder and extending and retracting the pushing cylinder And a rotating plate configured to be rotatable about a base end disposed below the pressing plate and driven by the hydraulic motor, wherein the rotating plate is a member of the pressing plate. A retracting rotation step of rotating to a position not interfering with the rear swing operation, a return step of swinging the pushing plate to the rear of the vehicle body, a scratching step of rotating the rotating plate to scrape debris Up rotation step, and the push plate is configured to perform a push step of swinging the front of the vehicle body.

In the fifth invention, in the dust collection vehicle, an oil temperature sensor for detecting a temperature of oil in the hydraulic circuit, and a pressing for detecting that the extension and contraction position of the pressing cylinder has reached a position before the end of the pressing process. And a limit switch. The control device reduces the discharge amount of the hydraulic pump from the reference amount when it is detected by the push limit switch that the expansion / contraction position of the push cylinder has reached a position before the end of the pushing step. A part, and the expansion / contraction position of the pushing cylinder is reached by the pushing limit switch after the arrival of the telescopic position of the pushing cylinder at a position before the end of the pushing step, and is then set according to the oil temperature detected (1) When the predetermined time has elapsed, the solenoid OFF section which turns off the solenoid of the first electromagnetic switching valve so as to stop the expansion and contraction of the pushing cylinder, and the expansion and contraction position of the pushing cylinder reach a position before the end of the pushing process. Is detected by the push limit switch, and a second predetermined time longer than the first predetermined time elapses. A solenoid ON unit turning ON the second electromagnetic switching valve solenoid as rolling plate is rotated, after said second predetermined time has elapsed in the second electromagnetic switching valve solenoid is ON, the retracted rotation step And a discharge amount return unit configured to return the discharge amount of the hydraulic pump to the reference amount when a third predetermined time before the end of the time has elapsed.

  According to the fifth aspect of the invention, when switching from the pressing process to the retraction rotation process, the same pressing is performed at the same timing at which the solenoid of the electromagnetic switching valve is turned ON / OFF and the timing at which the discharge amount of the hydraulic pump is changed. It is determined using a limit switch. Since it is not necessary to prepare separate limit switches, it is possible to prevent an increase in cost due to an increase in the number of parts. Further, the switching timing of the electromagnetic switching valve based on the oil temperature and the timing for reducing the discharge amount of the hydraulic pump can be well matched. Therefore, according to the fifth aspect of the present invention, it is possible to highly suppress both the generation of the abnormal sound due to the bottom thrust and the generation of the abnormal sound accompanying the switching of the operation while suppressing the cost increase.

In a sixth aspect of the present invention, in the dust collection vehicle, an oil temperature sensor for detecting the temperature of oil in the hydraulic circuit, and detection that the position of the rotary plate has reached a position before the end of the scraping rotation process And a rotation limit switch. The control device is configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the rotation limit switch that the position of the rotary plate has reached a position before the end of the scraping and rotating process. It is set according to the oil temperature detected by the oil temperature sensor after it is detected by the rotation limit switch that the reduction portion and the position of the rotary plate have reached a position before the end of the scraping and rotating step. And a solenoid OFF portion for turning off the solenoid of the second electromagnetic switching valve so as to stop the rotation of the rotary plate after stopping the hydraulic motor when the first predetermined time has passed; A second predetermined time which is longer than the first predetermined time has elapsed since it is detected by the rotation limit switch that the position before the end of the raising and rotating process has been reached. That when the solenoid ON portion in which the push plate is ON the first electromagnetic switching valve solenoid so as to swing the front of the vehicle body, said second predetermined time has elapsed in the first electromagnetic switching valve solenoid is ON And a discharge amount return unit configured to return the discharge amount of the hydraulic pump to the reference amount when a third predetermined time before the end of the pressing step has elapsed.

  According to the sixth aspect of the invention, when switching from the raking and rotating step to the pushing step, the timing at which the solenoid of the electromagnetic switching valve is turned ON / OFF and the timing at which the discharge amount of the hydraulic pump is changed are the same. It is determined using a rotation limit switch. Since it is not necessary to prepare separate limit switches, it is possible to prevent an increase in cost due to an increase in the number of parts. Further, the switching timing of the electromagnetic switching valve based on the oil temperature and the timing for reducing the discharge amount of the hydraulic pump can be well matched. Therefore, according to the sixth aspect of the present invention, it is possible to highly suppress both the generation of the abnormal sound due to the bottom thrust and the generation of the abnormal sound accompanying the switching of the operation while suppressing the cost increase.

  As described above, according to the present invention, in the dust collection vehicle provided with the hydraulically driven dust collection device, while suppressing the cost increase, the generation of the abnormal noise due to the bottom thrust and the generation of the abnormal noise accompanying the switching of the operation Both can be highly suppressed.

It is a side view of the refuse collection car concerning an embodiment of the invention. It is a side view showing a part of dust loading device concerning a 1st embodiment. It is a side view showing other parts of the refuse loading device concerning a 1st embodiment. It is a figure showing one state of the inversion process of the dust loading device concerning a 1st embodiment. It is a figure showing one state of the descent | fall process of the dust loading apparatus which concerns on 1st Embodiment. It is a figure showing one state of the compression process of the dust loading device concerning a 1st embodiment. It is a figure showing 1 state of the raising process of the dust loading apparatus which concerns on 1st Embodiment. It is an operation cycle figure of the dust loading device concerning a 1st embodiment. It is a hydraulic circuit figure of the refuse collection car concerning a 1st embodiment. It is a control system figure of the refuse collection car concerning a 1st embodiment. It is a flowchart showing switch control from a raise process to an inversion process. It is a time chart at the time of switching to a reversal process from a rise process. It is a side view of the dust loading device concerning a 2nd embodiment. It is an operation cycle figure of the dust loading device concerning a 2nd embodiment. It is a hydraulic circuit diagram of the refuse collection car concerning a 2nd embodiment.

First Embodiment
As shown in FIG. 1, the dust collection vehicle 1 according to the present embodiment includes a dust storage box 3 mounted on a chassis 2 and a dust insertion box 4 connected to the dust storage box 3. A driver's cab 1A is provided in front of the waste storage box 3. The dust input box 4 is supported by the support pins 5 above the opening 3 a (see FIG. 2) of the dust storage box 3. An inlet 7 is formed at the rear of the waste input box 4. The dust 55 (see FIG. 2) is introduced into the interior of the dust input box 4 from the inlet 7.

  As shown in FIG. 2, a dust loading device 8 is disposed inside the dust input box 4. The dust loading device 8 compresses the dust 55 introduced into the dust input box 4 and loads the dust 55 into the dust storage box 3. As shown in FIG. 1, an operation switch 39 for driving the dust loading device 8 is provided at the rear of the dust input box 4.

  As shown in FIG. 3, on the left side wall and the right side wall of the dust input box 4, a guide groove member 9 is provided which extends obliquely backward and downward. The dust loading device 8 includes a sliding plate 10 and a rotatable guide roller 11 attached to the sliding plate 10. The guide roller 11 is slidably engaged with the guide groove member 9.

  A boss 19 is formed on the upper side of the slide plate 10. The support shaft 12 is inserted into the boss portion 19. A sliding cylinder 13 consisting of a hydraulic cylinder is connected to the support shaft 12. The sliding cylinder 13 extends rearward and obliquely downward from the support shaft 12. The sliding cylinder 13 includes a cylinder rod 13 a connected to the support shaft 12 and a cylinder tube 13 b attached to the side wall of the dust input box 4. The sliding plate 10 reciprocates up and down along the guide groove member 9 by the expansion and contraction operation of the sliding cylinder 13. Although two sliding cylinders 13 are provided in the present embodiment, the number of the sliding cylinders 13 is not particularly limited.

  As shown in FIG. 2, at the lower end portion of the sliding plate 10, a compression plate 15 is supported by a shaft 15b so as to be able to swing in the longitudinal direction of the vehicle body. Behind the shaft 15b of the compression plate 15, a connection part 15a is formed. A swing cylinder 14 formed of a hydraulic cylinder is connected to the connection portion 15 a of the compression plate 15 and the support shaft 12 of the slide plate 10. The compression plate 15 is rocked back and forth by the expansion and contraction operation of the rocking cylinder 14. Reference numerals 14a and 14b respectively indicate a cylinder tube and a cylinder rod of the rocking cylinder 14. Although two oscillating cylinders 14 are provided in the present embodiment, the number of oscillating cylinders 14 is not particularly limited.

  The dust loading device 8 is a reversing step of swinging the compression plate 15 backward when the sliding plate 10 is in the raised position (see FIG. 4), and the sliding plate 10 is moved when the compression plate 15 is in the rearward position. Downward sliding (see FIG. 5), compression in which the compression plate 15 is pivoted forward when the sliding plate 10 is in the lowered position (see FIG. 6), and the compression plate 15 is in the forward position It is configured to operate as one cycle of a rising step (see FIG. 7) of sliding the sliding plate 10 upward at a given time. The dust loading device 8 loads the dust 55 loaded into the dust input box 4 into the dust storage box 3 by performing the above cycle. FIG. 8 is an operation cycle diagram showing the above cycle by the locus of the tip of the compression plate 15.

  As shown in FIG. 3, in the dust collection vehicle 1, the rising limit switch 31 for detecting that the length of the sliding cylinder 13 has become the length before the maximum length, and the length of the sliding cylinder 13 A down limit switch 32 is provided to detect that the length has reached the minimum length. As shown in FIG. 8, the rising limit switch 31 can detect that the sliding plate 10 has reached a position 31 B in front of the rising position 31 A in the rising step. The descent limit switch 32 can detect that the sliding plate 10 has reached the position 32B in front of the descent position 32A in the descent process. The configurations of the upper limit switch 31 and the lower limit switch 32 are not limited in any way, and may be, for example, proximity switches. The upper limit switch 31 and the lower limit switch 32 may be contact switches or non-contact switches. As shown in FIG. 3, in the present embodiment, a bracket 13c that protrudes rearward is formed on the cylinder rod 13a, and a metal plate 33 is fixed to the bracket 13c. The rising limit switch 31 and the falling limit switch 32 are configured to transmit a detection signal to the control device 48 (see FIG. 10) when the metal plate 33 approaches.

  As shown in FIG. 2, the dust collection vehicle 1 has a reversing limit switch 35 for detecting that the length of the rocking cylinder 14 has reached the minimum length, and the length of the rocking cylinder 14 is maximum. A compression limit switch 36 is provided to detect that the length has become short. As shown in FIG. 8, the reverse limit switch 35 can detect that the compression plate 15 has reached the position 35B in front of the rear position 35A in the reverse step. The compression limit switch 36 can detect that the compression plate 15 has reached the position 36B before the front position 36A in the compression process. As shown in FIG. 2, the reversing limit switch 35 and the compression limit switch 36 are attached to a bracket 37 connected to the sliding plate 10 and configured to ascend or descend with the sliding plate 10. The reverse limit switch 35 and the compression limit switch 36 are also configured by, for example, proximity limit switches. However, the configurations of the reverse limit switch 35 and the compression limit switch 36 are not particularly limited. In the present embodiment, the metal plate 38 is fixed to the cylinder tube 14 a of the rocking cylinder 14. The reverse limit switch 35 and the compression limit switch 36 are configured to transmit a detection signal to the controller 48 when the metal plate 38 approaches.

  FIG. 9 is a hydraulic circuit diagram showing a part of the hydraulic circuit 60 provided in the refuse collection vehicle 1. The refuse collection vehicle 1 includes a hydraulic pump 41 capable of changing the discharge amount. Although the structure of the hydraulic pump 41 is not limited at all, for example, a variable displacement piston pump can be used. In addition, the dust collection wheel 1 is provided with a first electromagnetic switching valve 51 for switching the operation of the sliding cylinder 13 and a second electromagnetic switching valve 52 for switching the operation of the oscillating cylinder 14. The first electromagnetic switching valve 51 is connected to the sliding cylinder 13 via the hydraulic piping 53, and the second electromagnetic switching valve 52 is connected to the swing cylinder 14 via the hydraulic piping 54. The first electromagnetic switching valve 51 is connected to the hydraulic pump 41 via the hydraulic piping 55, and the second electromagnetic switching valve 52 is connected to the first electromagnetic switching valve 51 via the hydraulic piping 58.

  The configurations of the first electromagnetic switching valve 51 and the second electromagnetic switching valve 52 are not particularly limited, but in the present embodiment, the first electromagnetic switching valve 51 and the second electromagnetic switching valve 52 both have three positions of the electromagnetic pilot 6 port It is comprised by the switching valve.

  The first electromagnetic switching valve 51 has a spool (not shown), and a lowering solenoid 51a and a raising solenoid 51b for changing the position of the spool. When a drive signal is transmitted from the control device 48 to the lowering solenoid 51a, the lowering solenoid 51a is turned on, and the position of the spool is changed so as to extend the sliding cylinder 13. Along with the extension of the sliding cylinder 13, the sliding plate 10 is lowered and the lowering step is performed. When a drive signal is transmitted from the control device 48 to the rising solenoid 51b, the rising solenoid 51b is turned on, and the position of the spool is changed so as to contract the sliding cylinder 13. Along with the contraction of the sliding cylinder 13, the sliding plate 10 ascends and an ascending process is performed.

  The second electromagnetic switching valve 52 has a spool (not shown), and a reversing solenoid 52a and a compression solenoid 52b for changing the position of the spool. When a drive signal is supplied from the controller 48 to the reversing solenoid 52a, the reversing solenoid 52a is turned on, and the position of the spool is changed so as to contract the swing cylinder 14. With the contraction of the rocking cylinder 14, the compression plate 15 is rocked backward, and the reversing process is performed. When a drive signal is transmitted from the control device 48 to the compression solenoid 52b, the compression solenoid 52b is turned on, and the position of the spool is changed so as to extend the swing cylinder 14. With the extension of the swing cylinder 14, the compression plate 15 swings forward to perform the compression process.

  The hydraulic circuit 60 is provided with an oil temperature sensor 56 for detecting the oil temperature. In the present embodiment, the oil temperature sensor 56 is provided in the tank 57 and detects the temperature of the oil in the tank 57. However, the installation position of the oil temperature sensor 56 is not particularly limited, and the oil temperature sensor 56 may be installed at a location other than the tank 57 in the hydraulic circuit 60.

  As shown in FIG. 10, the controller 48 is configured to receive signals from the up limit switch 31, the down limit switch 32, the reverse limit switch 35, the compression limit switch 36, the oil temperature sensor 56, and the operation switch 39. It is done. In addition, the control device 48 is configured to transmit drive signals to the ascending solenoid 51 b, the descending solenoid 51 a, the reversing solenoid 52 a, the compression solenoid 52 b, and the hydraulic pump 41. The control device 48 includes a discharge amount reducing unit 48a, a solenoid OFF unit 48b, a solenoid ON unit 48c, and a discharge amount returning unit 48d. The functions of the discharge amount reducing unit 48a, the solenoid OFF unit 48b, the solenoid ON unit 48c, and the discharge amount returning unit 48d will be described later. The discharge amount reducing unit 48a, the solenoid OFF unit 48b, the solenoid ON unit 48c, and the discharge amount returning unit 48d may be configured by hardware, and are realized by executing a predetermined computer program. May be

  Next, a control method of the dust loading device 8 will be described. The control of the dust loading device 8 is performed by the controller 48. As described above, the dust loading device 8 performs the reversing step, the lowering step, the compression step, and the raising step. First, switching control from the rising process to the reversing process will be described.

<Switching control from rising process to reversing process>
FIG. 11 is a flowchart showing switching control from the ascending process to the reversing process, and FIG. 12 is a time chart of switching control from the ascending process to the reversing process. The switching control from the ascending process to the reversing process is performed from the middle of the ascending process. In step S1, the upward solenoid 51b of the first electromagnetic switching valve 51 is ON, and the discharge amount of the hydraulic pump 41 is set to a normal amount. In such a state, the sliding cylinder 13 continues to extend and the sliding plate 10 continues to ascend.

  In step S2, the control device 48 determines whether the rising limit switch 31 has been turned ON. If it is determined that the rising limit switch 31 is turned on, the controller 48 receives a signal from the oil temperature sensor 56 in step S3, and detects the oil temperature. Further, in step S4, the discharge amount reducing unit 48a of the control device 48 reduces the discharge amount of the hydraulic pump 41 while keeping the raising solenoid 51b ON. As described above, by reducing the discharge amount of the hydraulic pump 41, generation of abnormal noise due to abrupt stop of the sliding cylinder 13 can be suppressed at the time of switching from the raising step to the reversing step. As shown in FIG. 12, the time when the rising limit switch 31 is turned on is T1.

  Next, in step S5, the control device 48 determines whether a first predetermined time has elapsed from time T1. The first predetermined time is a time set in advance according to the oil temperature, and is uniquely determined based on the oil temperature. The control device 48 includes, for example, a memory in which a map or an arithmetic expression or the like defining the relationship between the oil temperature and the first predetermined time is stored, and detection is performed by referring to the map or the arithmetic expression stored in the memory. The first predetermined time may be specified from the detected oil temperature.

  In step S5, when it is determined that the first predetermined time has elapsed from time T1, the process proceeds to step S6, where the solenoid OFF unit 48b of the control device 48 turns off the rising solenoid 51b. Since the spool of the first electromagnetic switching valve 51 moves by receiving the hydraulic pressure, there is a time delay from when the raising solenoid 51b is switched from ON to OFF until the movement of the spool is completed. As shown in FIG. 12, when the raising solenoid 51b is turned off at time T2, the spool of the first electromagnetic switching valve 51 moves toward the neutral position, and reaches the neutral position at time T3 delayed from time T2. Do. When the spool reaches the neutral position, the extension operation of the sliding cylinder 13 is stopped.

  If the extension operation of the slide cylinder 13 is stopped earlier, the slide cylinder 13 will stop earlier than the original stop position, and the original stroke amount can not be secured. On the other hand, when the stop of the extension operation of the slide cylinder 13 is delayed, the slide cylinder 13 is contracted beyond the original stop position, and there is a possibility that the noise due to the bottom thrust is generated. Therefore, it is preferable that the time (ΔT13 = T3-T1) from when the rising limit switch 31 is turned ON to when the extension operation of the sliding cylinder 13 stops is always constant. However, the time delay ΔT23 = T3-T2 varies depending on the viscosity of the oil. The higher the viscosity of the oil, the longer the time delay ΔT23. Since the viscosity of the oil varies with the oil temperature, the time delay ΔT23 varies with the oil temperature and is not constant. The lower the oil temperature, the higher the viscosity of the oil, so the time delay ΔT23 becomes longer as the oil temperature decreases. Therefore, in the present embodiment, by setting the first predetermined time in accordance with the oil temperature as described above, the time ΔT13 from when the rising limit switch 31 is turned ON until the extension operation of the sliding cylinder 13 stops is ΔT13. I tried to be as constant as possible. In the present embodiment, the first predetermined time is set to be shorter as the oil temperature is lower and to be longer as the oil temperature is higher.

  On the other hand, since the discharge amount of the hydraulic pump 41 is reduced when the rising limit switch 31 is turned ON, the operating speed of the sliding cylinder 13 is reduced when the rising limit switch 31 is turned ON. Therefore, if the first predetermined time is set without considering the decrease in the discharge amount of the hydraulic pump 41, the sliding cylinder 13 is stopped before the sliding cylinder 13 reaches the original stop position. It will be. Therefore, in the present embodiment, the first predetermined time is set in consideration of not only the oil temperature but also the reduction of the discharge amount of the hydraulic pump 41. That is, the first predetermined time is set to be longer than when the discharge amount of the hydraulic pump 41 is not reduced.

  After the raising solenoid 51b is turned off in step S6, the control device 48 determines whether or not a second predetermined time has elapsed since the raising limit switch 31 was turned on in step S7. When it is determined that the second predetermined time has elapsed, the solenoid ON unit 48c of the control device 48 turns on the reverse solenoid 52a of the second electromagnetic switching valve 52 in step S8. Then, the rocking cylinder 14 starts to contract and the compression plate 15 rocks backward. The rocking of the compression plate 15 is preferably started after the rising of the sliding plate 10 is stopped. Therefore, it is preferable to turn on the reverse solenoid 52a after the spool of the first electromagnetic switching valve 51 reaches the neutral position. Therefore, in the present embodiment, the second predetermined time is set to be longer than the first predetermined time. In addition, below, the time which 2nd predetermined time passed from time T1 is set to T4.

  Next, after turning on the reversing solenoid 52a in step S8, the control device 48 determines in step S9 whether or not a third predetermined time has elapsed since the reversing solenoid 52a was turned on. If it is determined that the third predetermined time has elapsed, the discharge amount returning unit 48d of the control device 48 returns the discharge amount of the hydraulic pump 41 to the normal amount in step S10, and performs the reverse normal operation. As described above, by continuing to keep the discharge amount of the hydraulic pump 41 low until the third predetermined time elapses after the reversing solenoid 52a is turned ON, the oscillating cylinder 14 is switched at the time of switching from the lifting step to the reversing step. The generation of abnormal noise due to the sudden start of movement is suppressed. Time T5 in FIG. 12 represents the time when the discharge amount of the hydraulic pump 41 is returned to the normal amount.

  As described above, the switching from the rising process to the reversing process is performed. After the step S10, the reversing step is continued.

<Switching control from reversing process to descending process>
The switching from the reversing step to the lowering step is performed in the same manner as the switching from the lifting step to the reversing step. Specifically, the rising limit switch 31, the rising solenoid 51b, and the reversing solenoid 52a at the time of switching from the lifting process to the reversing process are respectively replaced with the reversing limit switch 35, the reversing solenoid 52a, and the lowering solenoid 51a. Switching from the reversing process to the lowering process is performed by performing the same steps as in FIG. Therefore, the detailed description of the switching from the reversing step to the lowering step will be omitted.

<Switching from descending process to compression process>
The switching from the descending process to the compression process is also performed in the same manner as the switching from the ascending process to the reversing process. Specifically, the rising limit switch 31, the rising solenoid 51b and the reversing solenoid 52a at the time of switching from the lifting step to the reversing step are respectively replaced with the lowering limit switch 32, the lowering solenoid 51a and the compression solenoid 52b, and the above steps S1 to S10 are performed. By performing the same steps as described above, the switching from the descending process to the compression process is performed. Therefore, the detailed description of the switching from the lowering process to the compression process will be omitted.

<Switching from compression process to rising process>
The switching from the compression process to the rising process is also performed in the same manner as the switching from the rising process to the reversing process. Specifically, the rising limit switch 31, the rising solenoid 51b, and the reversing solenoid 52a at the time of switching from the rising step to the reversing step are replaced with the compression limit switch 36, the compression solenoid 52b, and the rising solenoid 51b, respectively. By performing the same steps as described above, the switching from the compression process to the ascending process is performed. Therefore, the detailed description of switching from the compression process to the rising process will be omitted.

  As described above, according to the dust collection vehicle 1 according to the present embodiment, the timing at which the solenoids of the electromagnetic switching valves 51 and 52 are turned ON / OFF, and the hydraulic pump 41 The timing to change the discharge amount is determined using the same rising limit switch 31. Similarly, when switching from the reversing process to the lowering process, when switching from the lowering process to the compression process, and when switching from the compression process to the rising process, the solenoids of the electromagnetic switching valves 51 and 52 are turned ON / OFF. The timing and the timing for changing the discharge amount of the hydraulic pump 41 are determined using the same reverse limit switch 35, the same down limit switch 32, and the same compression limit switch 36, respectively. According to the dust collection vehicle 1 according to the present embodiment, the limit switch for determining the timing of turning on / off the solenoids of the electromagnetic switching valves 51 and 52 when switching each process, and the discharge amount of the hydraulic pump 41 Since it is not necessary to prepare separately the limit switch for determining the timing of changing H, it is possible to prevent the cost increase due to the increase in the number of parts. Further, according to the dust collection vehicle 1 according to the present embodiment, the switching timing of the electromagnetic switching valves 51 and 52 based on the oil temperature and the timing of reducing the discharge amount of the hydraulic pump 41 can be well matched. Therefore, it is possible to highly suppress both the generation of the abnormal noise due to the bottom thrust and the generation of the abnormal noise accompanying the switching of the operation while suppressing the cost increase of the dust collection vehicle 1.

Second Embodiment
The dust collection vehicle 1 according to the second embodiment shown in FIG. 13 is the dust collection vehicle 1 according to the first embodiment, in which the configuration of the dust loading device 8 is modified. The dust loading device 8 according to the second embodiment is a so-called rotary plate type. In the following description, the same parts as those of the first embodiment are denoted by the same reference numerals, and the detailed description thereof is omitted.

  The dust loading device 8 includes a swingable pressing plate 110, a rotatable rotating plate 115, a pressing cylinder 113, and a hydraulic motor 114 (see FIG. 15). The pressing plate 110 is supported by the side wall of the dust input box 6 so as to be able to swing in the longitudinal direction of the vehicle body. The pressing cylinder 113 has a rod 113 a connected to the pressing plate 110. The rotary plate 115 is configured to be rotatable with the proximal end 115 a as a fulcrum. A reduction gear 114a is connected to a base end 115a of the rotary plate 115, and a hydraulic motor 114 is connected to the reduction gear 114a. The rotary plate 115 is driven by a hydraulic motor 114. The dust loading device 8 is configured to scrape the dust 55 introduced into the dust input box 6 by the rotary plate 115 and to push the dust 55 into the dust storage box 3 by the pushing plate 110. The dust loading device 8 is configured to compress the dust 55 introduced into the dust input box 6 and load the dust into the dust storage box 3 by combining the rotation operation of the rotating plate 115 and the swinging operation of the pressing plate 110. It is done.

  The refuse collection vehicle 1 according to the second embodiment is provided with a push limit switch 132 that detects the extension of the push cylinder 113 in front of the maximum extension position. The push limit switch 132 is attached to, for example, the inner wall of the dust input box 6 and is configured by a proximity switch. A metal plate 133 is fixed to the cylinder rod 113a. The pressing limit switch 132 is configured to transmit a detection signal to the control device 48 when the metal plate 133 approaches.

  In addition, the dust collection vehicle 1 is provided with a rotation limit switch 135 for detecting the rotation position of the rotary plate 115. The rotation limit switch 135 detects a position in front of a position where the rotary plate 115 is substantially horizontal in front of the base end 115 a (a position shown by an imaginary line in FIG. 13, hereinafter this position is referred to as a rotation stop position). It is configured to The rotation limit switch 135 is attached to, for example, the outer wall of the dust input box 6 and is configured by a proximity switch. A metal plate 138 is fixed to the base end 115 a of the rotating plate 115. The rotation limit switch 135 is configured to transmit a detection signal to the controller 48 when the metal plate 138 approaches.

  FIG. 14 is an operation cycle diagram of the dust loading device 8 according to the second embodiment. The dust loading device 8 rotates the rotary plate 115 from the rotation stop position to a position not interfering with the backward swing operation of the pressing plate 110 when the pressing plate 110 is at the front position (the position shown by the phantom line in FIG. 13). Retracting rotation process for moving the pressing plate 110 from the front position to the back position (the position shown by the solid line in FIG. 13), and the back swing operation of the pressing plate 110 so as to scrape the dust 55. Scraping rotation step of rotating from the position not interfering with the rotation position to the rotation stop position, and pressing step of swinging the pressing plate 110 from the rear position to the front position when the rotary plate 115 is stopped at the rotation stop position. It is configured to operate as one cycle. In addition, a return process and a part of scraping rotation process are performed simultaneously. In the retraction and rotation process, the pressing cylinder 113 stops in an extended state, and the hydraulic motor 114 rotates forward. In the return step, the hydraulic motor 114 continues forward rotation, and the pressing cylinder 113 contracts. In the raking and rotating process, the hydraulic motor 114 rotates forward. In the pressing process, the hydraulic motor 114 is stopped and the pressing cylinder 113 is extended.

  FIG. 15 is a hydraulic circuit diagram showing a part of the hydraulic circuit 60 provided in the refuse collection vehicle 1 according to the second embodiment. The same parts as those of the hydraulic circuit 60 according to the first embodiment are designated by the same reference numerals, and the detailed description thereof is omitted. The dust collection vehicle 1 according to the second embodiment includes a hydraulic motor 114, a first electromagnetic switching valve 151 that switches the operation of the pushing cylinder 113, and a second electromagnetic switching valve 152 that switches the operation of the hydraulic motor 114. . Each of the first electromagnetic switching valve 151 and the second electromagnetic switching valve 152 is configured of an electromagnetic pilot 6-port switching valve in three positions. However, the configurations of the first electromagnetic switching valve 151 and the second electromagnetic switching valve 152 are not particularly limited. The first electromagnetic switching valve 151 has a spool (not shown), an extension solenoid 151a for moving the spool to a position for extending the pushing cylinder 113, and a contraction solenoid 151b for moving the spool to a position for contracting the pushing cylinder 113. There is. The second electromagnetic switching valve 152 has a spool, a forward rotation solenoid 152a that moves the spool to a position that causes the hydraulic motor 114 to rotate forward, and a reverse solenoid 152b that moves the spool to a position that reverses the hydraulic motor 114. There is.

  In the dust collection vehicle 1 according to the second embodiment, the reversing step, the lowering step, the compression step, and the raising step of the first embodiment are respectively replaced with the retracting rotation step, the return step, the scraping rotation step, and the pressing step described above. In one embodiment, the rising limit switch 31 and the compression limit switch 36 are replaced with the above-described push limit switch 132 and rotation limit switch 135, respectively, and the reversing solenoid 52a, the lowering solenoid 51a, the compression solenoid 52b, and the rising solenoid 51b are each normally rotating Similar to the first embodiment in switching from the pushing process to the retracting rotation process and switching from the scraping rotation process to the pushing process by replacing the solenoid 152a, the contraction solenoid 151b, the forward rotation solenoid 152a, and the extension solenoid 151a. Execute control of It can be. The control content is the same as in the first embodiment, and thus the description thereof is omitted.

  Also in the refuse collection vehicle 1 according to the second embodiment, the same effect as that of the refuse collection vehicle 1 according to the first embodiment can be obtained. That is, at the time of switching from the pushing process to the retraction and rotation process, and at the switching from the raking and rotating process to the pressing process, the timing of turning on / off the solenoids of the electromagnetic switching valves 151 and 152; The timing at which the discharge amount is changed is determined using the same push limit switch 132 and the same rotation limit switch 135, respectively. Also in the dust collection vehicle 1 according to the present embodiment, the limit switch for determining the timing of turning on / off the solenoids of the electromagnetic switching valves 151 and 152 at the time of switching the above processes, and the discharge amount of the hydraulic pump 41 Since it is not necessary to prepare separately the limit switch for determining the timing of changing H, it is possible to prevent the cost increase due to the increase in the number of parts. In addition, the switching timing of the electromagnetic switching valves 151 and 152 based on the oil temperature can be well matched with the timing of reducing the discharge amount of the hydraulic pump 41. Therefore, it is possible to highly suppress both the generation of the abnormal noise due to the bottom thrust and the generation of the abnormal noise accompanying the switching of the operation while suppressing the cost increase of the dust collection vehicle 1.

(Other embodiments)
The first embodiment and the second embodiment are merely examples of the embodiment of the present invention, and the present invention can be implemented in other various embodiments.

  In each of the above embodiments, the first predetermined time, the second predetermined time, and the third predetermined time are the time represented by seconds etc., but the first predetermined time, the second predetermined time, and the third predetermined time At least one of the times may be another amount equivalent to time. For example, at least one of the first predetermined time, the second predetermined time, and the third predetermined time may be a predetermined rotation amount of the hydraulic pump 41.

  In each of the embodiments, the hydraulic pump 41 is a variable displacement piston pump, but the hydraulic pump 41 may be any type as long as it can change the discharge amount, and the configuration thereof is not limited. For example, the hydraulic pump 41 may be a combination of a fixed displacement pump driven by a motor and an inverter capable of changing the rotational speed of the motor.

  In each of the embodiments, as shown in FIG. 12, the discharge amount of the hydraulic pump 41 can be changed in two stages. However, the discharge amount of the hydraulic pump 41 may be variable in three or more stages, or may be continuously variable. For example, the hydraulic pump 41 may reduce the discharge amount from the normal amount to multiple steps from time T1 to T5, and then increase the amount to multiple steps until it returns to the normal amount. Further, the hydraulic pump 41 may continuously decrease the discharge amount from the normal amount and continuously increase the amount until the normal amount is restored between time T1 and T5.

  The hydraulic pump 41 may be a dedicated hydraulic pump installed for the dust loading device 8, or may be a hydraulic pump that is shared with other devices mounted on the dust collection vehicle 1.

  In the refuse collection vehicle 1 according to the second embodiment, the hydraulic motor 114 is not limited to a hydraulic motor capable of forward rotation and reverse rotation, and may be a hydraulic motor capable of only forward rotation. The second electromagnetic switching valve 152 may be a two-position electromagnetic switching valve that switches between normal rotation and stop of the hydraulic motor 114.

DESCRIPTION OF SYMBOLS 1 Dust collection vehicle 8 Dust loading apparatus 10 Sliding plate 13 Sliding cylinder 14 Rocking cylinder 15 Compression plate 31 Rising limit switch 32 Descent limit switch 35 Reverse limit switch 36 Compression limit switch 51 1st electromagnetic switching valve 52 2nd electromagnetic Changeover valve 56 Oil temperature sensor

Claims (6)

A waste storage box mounted on the chassis,
A waste input box having an inlet for receiving waste and connected to the waste storage box;
A dust loading device for feeding the dust introduced into the dust input box into the dust storage box;
A controller for controlling the dust loading device;
The dust loading device includes a hydraulic circuit having a hydraulic pump, a sliding cylinder including a hydraulic cylinder connected to the hydraulic circuit, a swing cylinder including a hydraulic cylinder connected to the hydraulic circuit, and the hydraulic circuit A first electromagnetic switching valve provided to the sliding cylinder and connected to the sliding cylinder, a second electromagnetic switching valve provided to the hydraulic circuit and connected to the oscillating cylinder, and attached to the sliding cylinder and A sliding plate that slides in the vertical direction by the expansion and contraction operation of the sliding cylinder, and is attached to the lower end of the sliding plate so as to be able to swing in the vehicle longitudinal direction, and swings in the vehicle longitudinal direction by the expansion and contraction operation of the swingable cylinder. A reversing step in which the compression plate swings backward, a descending step in which the sliding plate slides downward, a compression step in which the compression plate swings forward, and the sliding The board is Write a configured refuse collection vehicles to perform the increasing step to slide,
An oil temperature sensor that detects the temperature of oil in the hydraulic circuit;
And a rising limit switch for detecting that the expansion and contraction position of the sliding cylinder has reached a position before the end of the rising step,
The controller is
A discharge amount reduction unit that reduces the discharge amount of the hydraulic pump from a reference amount when it is detected by the increase limit switch that the expansion and contraction position of the sliding cylinder has reached a position before the end of the raising step;
A first predetermined value set according to the oil temperature detected by the oil temperature sensor after the extension limit switch has detected that the expansion / contraction position of the sliding cylinder has reached a position before the end of the elevation step. A solenoid OFF portion which turns off the solenoid of the first electromagnetic switching valve so as to stop the expansion and contraction of the sliding cylinder after a lapse of time;
The compression plate is detected when a second predetermined time longer than the first predetermined time elapses after the rise limit switch detects that the expansion / contraction position of the sliding cylinder has reached a position before the end of the elevation step. A solenoid ON section for turning on the solenoid of the second electromagnetic switching valve so that the switch pivots to the rear of the vehicle body;
After the second predetermined time has elapsed and the solenoid of the second electromagnetic switching valve has been turned ON , the discharge amount of the hydraulic pump is set to the above when the third predetermined time before the end of the reversing step has elapsed. A waste collection vehicle provided with a discharge amount return unit for returning to a reference amount. A waste storage box mounted on the chassis,
A waste input box having an inlet for receiving waste and connected to the waste storage box;
A dust loading device for feeding the dust introduced into the dust input box into the dust storage box;
A controller for controlling the dust loading device;
The dust loading device includes a hydraulic circuit having a hydraulic pump, a sliding cylinder including a hydraulic cylinder connected to the hydraulic circuit, a swing cylinder including a hydraulic cylinder connected to the hydraulic circuit, and the hydraulic circuit A first electromagnetic switching valve provided to the sliding cylinder and connected to the sliding cylinder, a second electromagnetic switching valve provided to the hydraulic circuit and connected to the oscillating cylinder, and attached to the sliding cylinder and A sliding plate that slides in the vertical direction by the expansion and contraction operation of the sliding cylinder, and is attached to the lower end of the sliding plate so as to be able to swing in the vehicle longitudinal direction, and swings in the vehicle longitudinal direction by the expansion and contraction operation of the swingable cylinder. A reversing step in which the compression plate swings backward, a descending step in which the sliding plate slides downward, a compression step in which the compression plate swings forward, and the sliding The board is Write a configured refuse collection vehicles to perform the increasing step to slide,
An oil temperature sensor that detects the temperature of oil in the hydraulic circuit;
A reverse limit switch for detecting that the expansion and contraction position of the rocking cylinder has reached a position before the end of the reversing step;
The controller is
A discharge amount reduction unit that reduces the discharge amount of the hydraulic pump from a reference amount when it is detected by the reverse limit switch that the expansion / contraction position of the rocking cylinder has reached a position before the end of the reverse process;
A first predetermined value set according to the oil temperature detected by the oil temperature sensor after it is detected by the inversion limit switch that the extension / contraction position of the rocking cylinder has reached a position before the end of the inversion step A solenoid OFF portion which turns off the solenoid of the second electromagnetic switching valve so as to stop the expansion and contraction of the rocking cylinder when time passes;
The sliding is performed when a second predetermined time longer than the first predetermined time elapses after the reversal limit switch detects that the expansion / contraction position of the rocking cylinder has reached a position before the end of the reversal process. A solenoid ON portion for turning on the solenoid of the first electromagnetic switching valve so that the plate slides downward;
After the second predetermined time has elapsed and the solenoid of the first electromagnetic switching valve has been turned ON , the discharge amount of the hydraulic pump is set to the above when the third predetermined time before the end of the lowering step has elapsed. A waste collection vehicle provided with a discharge amount return unit for returning to a reference amount. A waste storage box mounted on the chassis,
A waste input box having an inlet for receiving waste and connected to the waste storage box;
A dust loading device for feeding the dust introduced into the dust input box into the dust storage box;
A controller for controlling the dust loading device;
The dust loading device includes a hydraulic circuit having a hydraulic pump, a sliding cylinder including a hydraulic cylinder connected to the hydraulic circuit, a swing cylinder including a hydraulic cylinder connected to the hydraulic circuit, and the hydraulic circuit A first electromagnetic switching valve provided to the sliding cylinder and connected to the sliding cylinder, a second electromagnetic switching valve provided to the hydraulic circuit and connected to the oscillating cylinder, and attached to the sliding cylinder and A sliding plate that slides in the vertical direction by the expansion and contraction operation of the sliding cylinder, and is attached to the lower end of the sliding plate so as to be able to swing in the vehicle longitudinal direction, and swings in the vehicle longitudinal direction by the expansion and contraction operation of the swingable cylinder. A reversing step in which the compression plate swings backward, a descending step in which the sliding plate slides downward, a compression step in which the compression plate swings forward, and the sliding The board is Write a configured refuse collection vehicles to perform the increasing step to slide,
An oil temperature sensor that detects the temperature of oil in the hydraulic circuit;
A lowering limit switch for detecting that the expansion and contraction position of the sliding cylinder has reached a position before the end of the lowering step;
The controller is
A discharge amount reduction unit configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the lower limit switch that the expansion and contraction position of the sliding cylinder has reached a position before the end of the lowering step;
A first predetermined value set according to the oil temperature detected by the oil temperature sensor after the extension limit position of the sliding cylinder has reached a position before the end of the lowering step by the lowering limit switch A solenoid OFF portion which turns off the solenoid of the first electromagnetic switching valve so as to stop the expansion and contraction of the sliding cylinder after a lapse of time;
The compression plate is detected when a second predetermined time longer than the first predetermined time elapses after the lowering limit switch detects that the expansion / contraction position of the sliding cylinder has reached a position before the end of the lowering step. A solenoid ON section for turning on the solenoid of the second electromagnetic switching valve so that the switch swings forward in the vehicle body;
After the second predetermined time has elapsed and the solenoid of the second electromagnetic switching valve has been turned on, the discharge amount of the hydraulic pump is set to the above when the third predetermined time before the end of the compression process has elapsed. A waste collection vehicle provided with a discharge amount return unit for returning to a reference amount. A waste storage box mounted on the chassis,
A waste input box having an inlet for receiving waste and connected to the waste storage box;
A dust loading device for feeding the dust introduced into the dust input box into the dust storage box;
A controller for controlling the dust loading device;
The dust loading device includes a hydraulic circuit having a hydraulic pump, a sliding cylinder including a hydraulic cylinder connected to the hydraulic circuit, a swing cylinder including a hydraulic cylinder connected to the hydraulic circuit, and the hydraulic circuit A first electromagnetic switching valve provided to the sliding cylinder and connected to the sliding cylinder, a second electromagnetic switching valve provided to the hydraulic circuit and connected to the oscillating cylinder, and attached to the sliding cylinder and A sliding plate that slides in the vertical direction by the expansion and contraction operation of the sliding cylinder, and is attached to the lower end of the sliding plate so as to be able to swing in the vehicle longitudinal direction, and swings in the vehicle longitudinal direction by the expansion and contraction operation of the swingable cylinder. A reversing step in which the compression plate swings backward, a descending step in which the sliding plate slides downward, a compression step in which the compression plate swings forward, and the sliding The board is Write a configured refuse collection vehicles to perform the increasing step to slide,
An oil temperature sensor that detects the temperature of oil in the hydraulic circuit;
And a compression limit switch for detecting that the expansion and contraction position of the rocking cylinder has reached a position before the end of the compression process.
The controller is
A discharge amount reduction unit configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the compression limit switch that the expansion and contraction position of the rocking cylinder has reached a position before the end of the compression process;
A first predetermined value set according to the oil temperature detected by the oil temperature sensor after the compression limit switch has detected that the expansion and contraction position of the rocking cylinder has reached a position before the end of the compression process A solenoid OFF portion which turns off the solenoid of the second electromagnetic switching valve so as to stop the expansion and contraction of the rocking cylinder when time passes;
The sliding is performed when a second predetermined time longer than the first predetermined time elapses after the compression limit switch detects that the expansion and contraction position of the rocking cylinder has reached a position before the end of the compression process. A solenoid ON portion for turning on the solenoid of the first electromagnetic switching valve so that the plate slides upward;
After the second predetermined time has elapsed and the solenoid of the first electromagnetic switching valve has been turned on, the discharge amount of the hydraulic pump is set to the above when the third predetermined time before the end of the rising step has elapsed. A waste collection vehicle provided with a discharge amount return unit for returning to a reference amount. A waste storage box mounted on the chassis,
A waste input box having an inlet for receiving waste and connected to the waste storage box;
A dust loading device for feeding the dust introduced into the dust input box into the dust storage box;
A controller for controlling the dust loading device;
The dust loading device includes: a hydraulic circuit having a hydraulic pump; a pushing cylinder including a hydraulic cylinder connected to the hydraulic circuit; a hydraulic motor connected to the hydraulic circuit; A first electromagnetic switching valve connected to a cylinder, a second electromagnetic switching valve provided in the hydraulic circuit and connected to the hydraulic motor, and the pushing cylinder attached to the pushing cylinder and extending and retracting the pushing cylinder And a rotating plate configured to be rotatable about a base end disposed below the pressing plate and driven by the hydraulic motor, wherein the rotating plate is a member of the pressing plate. A retracting rotation step of rotating to a position not interfering with the rear swing operation, a return step of swinging the pushing plate to the rear of the vehicle body, a scratching step of rotating the rotating plate to scrape debris Up rotation step, and the pushing plate is a configured refuse collection vehicles to perform the pushing step of swinging the front of the vehicle body,
An oil temperature sensor that detects the temperature of oil in the hydraulic circuit;
And a pressing limit switch for detecting that the extension / contraction position of the pressing cylinder has reached a position before the end of the pressing process,
The controller is
A discharge amount reduction unit configured to reduce the discharge amount of the hydraulic pump from a reference amount when it is detected by the push limit switch that the expansion and contraction position of the push cylinder has reached a position before the end of the pushing step;
A first predetermined time set according to the oil temperature detected by the oil temperature sensor after the extension limit position of the pressing cylinder has reached a position before the end of the pressing step by the pressing limit switch A solenoid OFF portion which turns off the solenoid of the first electromagnetic switching valve so as to stop the expansion and contraction of the pushing cylinder when
When a second predetermined time, which is longer than the first predetermined time, elapses after the pressing limit switch detects that the extension / contraction position of the pressing cylinder has reached a position before the end of the pressing step, the rotary plate A solenoid ON portion for turning on the solenoid of the second electromagnetic switching valve so as to rotate;
After the second predetermined time has elapsed and the solenoid of the second electromagnetic switching valve has been turned ON , the discharge amount of the hydraulic pump is set when the third predetermined time before the end of the retraction and rotation process has elapsed. And a discharge amount return unit configured to return to the reference amount. A waste storage box mounted on the chassis,
A waste input box having an inlet for receiving waste and connected to the waste storage box;
A dust loading device for feeding the dust introduced into the dust input box into the dust storage box;
A controller for controlling the dust loading device;
The dust loading device includes: a hydraulic circuit having a hydraulic pump; a pushing cylinder including a hydraulic cylinder connected to the hydraulic circuit; a hydraulic motor connected to the hydraulic circuit; A first electromagnetic switching valve connected to a cylinder, a second electromagnetic switching valve provided in the hydraulic circuit and connected to the hydraulic motor, and the pushing cylinder attached to the pushing cylinder and extending and retracting the pushing cylinder And a rotating plate configured to be rotatable about a base end disposed below the pressing plate and driven by the hydraulic motor, wherein the rotating plate is a member of the pressing plate. A retracting rotation step of rotating to a position not interfering with the rear swing operation, a return step of swinging the pushing plate to the rear of the vehicle body, a scratching step of rotating the rotating plate to scrape debris Up rotation step, and the pushing plate is a configured refuse collection vehicles to perform the pushing step of swinging the front of the vehicle body,
An oil temperature sensor that detects the temperature of oil in the hydraulic circuit;
A rotation limit switch for detecting that the position of the rotating plate has reached a position before the end of the raking and rotating step;
The controller is
A discharge amount reduction unit that reduces the discharge amount of the hydraulic pump from a reference amount when it is detected by the rotation limit switch that the position of the rotary plate has reached a position just before the end of the scraping and rotating step;
A first predetermined value set according to the oil temperature detected by the oil temperature sensor after the rotation limit switch detects that the position of the rotary plate has reached a position before the end of the scraping and rotating step. A solenoid OFF unit which turns off the solenoid of the second electromagnetic switching valve so as to stop the hydraulic motor and stop the rotation of the rotary plate when time passes;
The pressing plate is detected when a second predetermined time longer than the first predetermined time elapses after the rotation limit switch detects that the position of the rotating plate has reached a position before the end of the scraping and rotating process. A solenoid ON section for turning on the solenoid of the first electromagnetic switching valve so that the switch swings forward in the vehicle body;
After the second predetermined time has elapsed and the solenoid of the first electromagnetic switching valve has been turned on, the discharge amount of the hydraulic pump is set to the above when the third predetermined time before the end of the pressing step has elapsed. A waste collection vehicle provided with a discharge amount return unit for returning to a reference amount.

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