JP6170351B2 - Garbage truck and control device thereof - Google Patents

Description

  The present invention relates to a garbage collection vehicle including a loading device capable of compressing and storing dust in a dust storage box and the control device.

  Conventionally, a dust storage box and a dust storage box (also referred to as a “tailgate”) that temporarily holds dust input from behind by an operator and moves the dust into the dust storage box are provided. There is known a loading device included in a garbage collection vehicle. This loading apparatus is disclosed in Patent Document 1, for example.

  For example, as shown in FIG. 9 (a), the conventional loading device has a rotating plate 102 that rotates in a dust bin 101 upon receiving hydraulic driving force, and a rotating plate 102 as shown in FIG. 9 (b). A pushing plate 103 that swings in the front-rear direction is provided to push the dust D pushed up in the dust throwing box 101 by the rotating plate 102 forward. The rotation range of the rotating plate 102 and the swinging range of the pushing plate 103 partially overlap, and the two cooperate to move the thrown-in dust D to the dust storage box 104, and the dust is stored in the dust storage box. It can be compressed and stored in 104.

  As shown in FIG. 9B, the dust D put into the dust throwing box 101 by an operator or the like is a front area in the dust throwing box 101 with reference to the support shaft 102a by the rotating rotating plate 102. Raise the inside. With the dust D raised, the rotating plate 102 temporarily stops at the position shown in FIG. Then, the raised dust D is pushed into the dust container 104 by the pushing plate 103 that swings forward.

  As described above, the rotating plate 102 receives a driving force by hydraulic pressure such as a hydraulic motor, and rotates around the support shaft 102a extending in the dust box 101 in the width direction. The driving force by the hydraulic pressure is controlled by a control unit. In addition, although FIG. 1 of Patent Document 1 describes a hydraulic circuit for a pushing plate, the hydraulic circuit for a rotating plate has the same configuration.

  Here, the hydraulic circuit for the rotating plate includes, for example, a hydraulic motor that generates the driving force for rotating the rotating plate 102, a hydraulic oil tank that can hold hydraulic oil, a hydraulic oil tank, and a hydraulic motor. A hydraulic pipe that connects the hydraulic pipe, a hydraulic pump that supplies hydraulic oil by applying pressure to the hydraulic pipe, and a hydraulic valve that can adjust the supply of the hydraulic oil to the hydraulic motor by switching the flow path . The hydraulic valve includes a valve body (spool) that can switch the flow path by moving in the hydraulic valve.

  However, during cold weather such as in winter, the hydraulic circuit is cooled, so the viscosity of the hydraulic oil in the hydraulic circuit is high. Therefore, for example, the response of a hydraulic valve (such as a solenoid valve) in the hydraulic circuit at the time of starting is slow. For this reason, even if the control unit issues a signal for controlling the hydraulic valve so as to stop the rotating plate 102 at the position shown in FIG. Specifically, a valve body (spool) built in the hydraulic valve is difficult to move in the hydraulic valve. For this reason, a time lag (delay) occurs until the movement is completed. As a result, the rotating plate 102 rotates to a position beyond the original position (the position shown in FIG. 9C) where it temporarily stops. Then, as shown in FIG. 9 (d), there arises a disadvantage that the pushing plate 103 interferes with the rotating plate 102.

JP-A-60-215107 (FIG. 1)

  Therefore, the present invention provides a dust collection vehicle and a control device for the dust collection vehicle that can smoothly perform the loading operation without interference of the push plate with the rotating plate even in cold weather. Let it be an issue.

The present invention is a dust storage box, a dust supply box connected to the rear of the dust storage box, and having a loading device for moving the dust input port and the dust input from the input port to the dust storage box, A revolving plate that rotates around a support shaft that is located in the dust throwing box and that receives a hydraulic driving force and extends in the width direction of the dust throwing box. A pushing plate that is located in the dust throwing box and is moved in the front-rear direction to move the dust pushed up by the rotating plate inside the dust throwing box to the dust containing box, and at least of the rotating plate. A control unit that performs control related to rotation, and a warm-up mode switch that is operated by an operator to perform warm-up operation of the rotating plate, and the rotating plate is a hydraulic valve included in a hydraulic circuit that generates the driving force. Channel switching More, the rotation of the one rotational direction, rotation in the other rotational direction, is the one of the states of stop, the control unit is powered after the warm-up mode switch by the operator, or during loading work of dust, Except when the rotating plate or the pushing plate is being moved by another instruction, the rotating plate performs a combined operation of the movement in the one rotation direction and the movement in the other rotation direction. It is a garbage collection vehicle which controls switching of the flow path of the hydraulic valve.

According to the configuration, the control unit switches the flow path of the hydraulic valve so that the rotating plate performs a combined operation of the movement in the one rotation direction and the movement in the other rotation direction. Control. When the movement in the one rotational direction and the movement in the other rotational direction are combined, the hydraulic oil in the hydraulic circuit flows in one direction and the other direction. Therefore, the viscosity of the hydraulic oil can be lowered by increasing the temperature of the hydraulic oil over time. For this reason, after the operation including the movement is performed, the switching of the flow path of the hydraulic valve becomes smooth. Therefore, unlike the conventional hydraulic valve, there is no interference between the rotating plate and the pushing plate due to the occurrence of a time lag (delay). It can be suppressed. Then, it is possible to prevent the combined operation from starting during the loading operation of the dust, that is, in the state where the dust is present in the dust throwing box, and the dust jumping out from the throwing port. In addition, the combined operation starts during the rotation of the rotating plate or the movement of the pushing plate according to an operation instruction other than the loading operation, and the operation other than the loading operation is not achieved or moves. It is possible to prevent the moving rotating plate from interfering with the pushing plate.

  Further, the control unit performs at least an upper edge portion of the charging port in the dust charging box with a combined operation of the movement of the rotating plate in the one rotation direction and the movement in the other rotation direction. The switching of the flow path of the hydraulic valve can be controlled so that the tip end portion of the rotating plate is not located in the inlet side region between the lower edge portion and the lower edge portion. According to this configuration, since the operation including the movement is performed in a region away from the worker who performs the dust loading operation, the operation including the movement is performed in the input port side region close to the worker. It is safe because it can reduce the risk of entrainment.

  Still further, a detection unit that detects a rotation position of the rotating plate is provided, and the control unit rotates the rotating unit in a facing region that faces the charging port side region across the support shaft in the dust container box. The switching of the flow path of the hydraulic valve can be controlled based on the detection result of the detection unit so that the plate is positioned. According to this configuration, since the operation including the movement is performed in the facing region that is a region away from the worker performing the dust loading operation, the operation including the movement is performed in the inlet side region close to the worker. It is safer because it can reduce the risk of entrainment and the like.

  Still further, in the control unit, the movement of the rotating plate in the direction away from one end in the circumferential direction of the input port side region in the facing region is larger than the movement in the direction approaching the one end. Thus, the switching of the flow path of the hydraulic valve can be controlled. According to this configuration, with the combined operation, the rotating plate sequentially moves in a direction away from one end in the circumferential direction of the input port side region. For this reason, since it is difficult for the rotating plate to move to the inlet side area close to the operator, the risk of entrainment and the like can be reliably reduced and it is safe.

  Still further, the control unit first moves the rotating plate to one end in the circumferential direction in the facing area, and moves away from one end in the circumferential direction of the inlet side area in the facing area after the movement. The switching of the flow path of the hydraulic valve can be controlled so that the movement in the direction and the movement in the direction approaching the one end are combined.

  According to this configuration, the combined operation can be started from one end in the circumferential direction in the facing region. For this reason, in order to take a wide movable range of the rotating plate when moving in a direction away from one end in the circumferential direction of the inlet side region as described above, the number of times of returning the rotating plate to the opposing region is set. Can be reduced. Therefore, the viscosity of the hydraulic oil can be efficiently lowered.

The present invention also includes a dust container, and a dust container having a loading device that is connected to the rear of the dust container, and that moves the dust charged through the dust container and the dust container into the dust container. , A control device that performs control related to the operation of the loading device, the loading device is located in the dust charging box, and receives the driving force by hydraulic pressure to receive the dust charging box A rotating plate that rotates about a support shaft that extends in the width direction of the dust, and is disposed in the dust throwing box, and the dust pushed up by the rotating plate inside the dust throwing box is moved to the dust containing box And a push-in plate that moves in the front-rear direction, and a warm-up mode switch that is operated by an operator to perform a warm-up operation of the rotary plate, the rotary plate having a hydraulic valve that generates the driving force For switching the flow path Ri is either state rotation, the stop of the rotation, the other direction of rotation of the one rotational direction, wherein the control device, after turning of the warm-up mode switch by the operator, or during loading work of dust, Except when the rotating plate or the pushing plate is being moved by another instruction, the rotating plate performs a combined operation of the movement in the one rotation direction and the movement in the other rotation direction. It is a control device for a garbage truck that controls switching of the flow path of the hydraulic valve.

  According to this configuration, the control device switches the flow path of the hydraulic valve so that the rotating plate performs a combined operation of the movement in the one rotation direction and the movement in the other rotation direction. Control. By moving the rotating plate, the hydraulic oil in the hydraulic circuit can be repeatedly switched in one direction and the other direction, and accordingly, the temperature of the hydraulic oil can be raised and the viscosity of the hydraulic oil can be lowered. For this reason, since the switching of the flow path of the hydraulic valve becomes smooth after the movement, the interference between the rotating plate and the pushing plate due to the occurrence of a time lag (delay) occurs as in the conventional hydraulic valve. Can be suppressed.

  According to the present invention, since the switching of the flow path of the hydraulic valve becomes smooth after the operation including the movement is performed, the rotating plate and the pushing plate due to the occurrence of a time lag (delay), as in the conventional hydraulic valve, It is possible to suppress the occurrence of interference. For this reason, even if it is cold, by performing the operation including the movement, the conventional inconvenience does not occur, and the loading operation can be performed smoothly.

1 is a side sectional view showing a garbage truck according to an embodiment of the present invention. It is operation | movement explanatory drawing of the rotating plate and pushing plate in the said garbage collection vehicle. It is a hydraulic circuit diagram regarding the hydraulic motor and the pushing cylinder in the said refuse collection vehicle. It is a block diagram which shows the structure of the control apparatus in the said garbage collection vehicle. It is a flowchart which shows the operation | movement regarding warm-up driving | running | working performed in the said control apparatus. It is operation | movement explanatory drawing of the said rotation board and pushing board at the time of a warm air driving | operation. It is operation | movement explanatory drawing regarding the movement of the said rotating plate at the time of a warm air driving | operation. It is a principal part expanded side sectional view which shows the operation | movement range of the rotating plate at the time of a warm air operation. It is the schematic of the side cross section which shows the loading procedure of the dust in the conventional refuse collection vehicle.

  Next, an embodiment of the present invention will be described. In the following description of the directions, the front and rear directions are directions based on the front and rear of the garbage truck. The width direction is the left-right direction when the garbage truck is viewed from the front or rear.

  FIG. 1 is a side sectional view showing a garbage truck 1 provided with a loading device according to the present embodiment. The garbage collection vehicle 1 uses a rotating plate type accommodation system. This garbage collection vehicle 1 includes a dust storage box 2 mounted on a vehicle body 1a, and a dust input box 3 connected to the rear part thereof. At the rear part of the dust input box 3, an input port 3a into which dust is input is formed. An opening 3 d for accommodating the dust thrown into the dust throwing box 3 in the dust throwing box 2 is provided at the lower front part of the dust throwing box 3.

  The dust input box 3 is provided with a cover member 39 that can open and close the input port 3a. The cover member 39 includes an upper cover 40 that opens and closes the upper portion of the insertion port 3a, and a lower cover 41 that opens and closes the lower portion of the insertion port 3a.

  The lower cover 41 is rotatably attached to the lower portion of the insertion port 3a, and can change between a standing posture and a horizontal posture (a broken line position in FIG. 1). The lower cover 41 is provided over almost the entire length in the vehicle width direction. When the lower cover 41 is in the horizontal posture, when the operator puts the dust from the insertion port 3a, the dust can be once placed on the lower cover 41, and the workability of throwing the dust can be improved.

  A rotating plate 52 and a pushing plate 53 are provided in the dust box 3. The rotary plate 52 is for scraping the dust thrown into the dust throwing box 3 to the upper front part from the arcuate bottom (also called “hopper”) 3e formed in the dust throwing box 3. It is integral with the lower support shaft 54 extending in the direction, and is rotatable about its axis. The pushing plate 53 is for moving (pushing) the dust scraped up on the rotating plate 52 into the dust containing box 2 connected to the front of the dust throwing box 3. The upper support shaft 55 extends in the width direction. And can swing forward and backward about its axis. The lower and upper support shafts 54 and 55 extend in parallel to each other so as to extend in the width direction in the dust throwing box 3, and both end portions thereof are respectively bearings (not shown) on the left and right side walls 3 c of the dust throwing box 3. ) Through and is supported rotatably. Note that the lower and upper support shafts 54 and 55 are not necessarily a single shaft, and can be two shafts in which portions supported by the bearings are separated on the left and right sides.

The rotary plate 52 is rotationally driven by a hydraulic motor 56 as a rotational drive means shown in FIG. 3 so as to be able to forward and reverse 360 °. The hydraulic motor 56 rotationally drives the lower support shaft 54, whereby the lower support shaft 54 and the lower support shaft 54 are rotated. The integral rotating plate 52 rotates. Note that the clockwise direction indicated by the arrow in FIG. During the warm-up operation described later, the rotary plate 52 is repeatedly combined with a forward movement r1 (see FIG. 7A) and a reverse movement r2 (see FIG. 7B).
The pushing plate 53 is swung forward and backward around the upper support shaft 55 by expansion and contraction of a pair of pushing cylinders 57 provided in the width direction as pushing driving means. The cylinder side end portion of the pushing cylinder 57 is attached to the left and right side walls 3 c by pins 58, and the piston side end portion is connected to the upper end portion of the pushing plate 53 by pins 59. During the warm-up operation described later, the pushing plate 53 is set to the position (pushing end position P) shown in FIG.

2A to 2D are operation explanatory views showing only the rotating plate 52, the pushing plate 53, and the pushing cylinder 57 extracted. In the present embodiment, the rotation of the rotating plate 52 indicated by the circular locus R in the direction of the arrow and the swinging operation of the push-in plate 53 indicated by the arc locus S in the direction of the arrow indicate that the dust is placed in the dust box 3. The thrown dust is stored in the dust container 2. That is, the rotating plate 52 starts a “rotating” process in which the rotating plate 52 shown in FIG. 2A is rotated clockwise by driving the hydraulic motor 56 with the position of about 9 o'clock in the drawing as the original position. To do.
When the rotating plate 52 reaches the approximately 12 o'clock position (standing position) shown in FIG. 2B, the tip 53a of the pushing plate 53 is moved backward (in the direction of the arrow Sr) by the shrinking operation of the pushing cylinder 57. When the swinging “backward” stroke is performed and the tip 53a swings backward to the position shown in FIG. 2C (retracting end position), the backward swinging of the pushing plate 53 stops. At this time, since the rotating plate 52 continues to rotate even while the push-in plate 53 is retracted, it is possible to prevent the rotating plate 52 from interfering with the rotating plate 52 during the retracting.
Thereafter, when the rotation plate 52 continues to rotate and returns to the original position (approximately 9 o'clock position) shown in FIG. 2D, the rotation by the rotation plate 52 stops and the pushing cylinder 57 extends. Then, a “pushing” process is performed in which the tip 53a of the pushing plate 53 swings forward (in the direction of arrow Sf). And if the front-end | tip part 53a of the pushing board 53 rocks | fluctuates forward to the position (pushing completion position P) shown to Fig.2 (a), the rocking | fluctuation forward of the pushing board 53 will stop. In this way, by operating the hydraulic motor 56 and the pushing cylinder 57, a one-cycle stroke operation is performed by rotating the rotating plate 52 and moving the pushing plate 53 backward and pushed.
Therefore, in the one-cycle process by rotation / retraction / push-in, the rotation plate 52 first starts to rotate from the original position, the push-in plate 53 moves backward to the retreat end position during the rotation, and the rotation plate 52 further moves to the original position. This means a series of operations in which the pushing plate 53 pushes from the reverse end position to the push end position P after the rotation is stopped after returning to step S2.

  In the vicinity of the lower support shaft 54 and the upper support shaft 55, proximity switches (60, 61, 62a, 62b) are provided as detection units for detecting the respective operation positions of the rotating plate 52 and the pushing plate 53. . The first proximity switch 60 has a dog 52b attached to the base end of the rotating plate 52 until the rotating plate 52 rotates from the original position (approximately 9 o'clock position) to the standing position (approximately 12 o'clock position). By detecting this, it is detected that the rotating plate 52 is in a position from the original position (approximately 9 o'clock position) to the standing position (approximately 12 o'clock position). Further, the dog 52b is formed in an arc shape substantially concentric with the center of the lower support shaft 54, and the first proximity switch 60 is configured so that the front end 52a of the rotating plate 52 is immediately before the standing position from the original position in the clockwise direction. The dog 12a is detected until it rotates to the position. As a result, the first proximity switch 60 changes from the non-detection state to the detection state at the original position and from the detection state to the non-detection at the standing position.

  Similarly, the second proximity switch 61 detects the dog 52b to detect that the rotating plate 52 is at the approximately 6 o'clock position. The second proximity switch 61 detects the dog 52b until the rotating plate 52 rotates from a position of approximately 6 o'clock to a position immediately before the original position (position of approximately 9 o'clock). Thereby, the 2nd proximity switch 61 becomes non-detection from a detection state in the said original position.

  The third proximity switch 62a detects the dog 55a attached to the upper support shaft 55, thereby detecting that the pushing plate 53 has reached the retreat end position (FIG. 2C). The fourth proximity switch 62b serving as a push end detection means detects that the push plate 53 has reached the push end position (FIG. 2A) by detecting the dog 55a. The first to fourth proximity switches are fixedly attached to the outer surface of the side wall 3c of the dust box 3.

  FIG. 3 is a hydraulic circuit diagram relating to the hydraulic motor 56 and the pushing cylinder 57. The hydraulic circuit connects a tank 63, a pump 64, a pressure control valve 65, a solenoid valve 66 for a motor as a hydraulic valve, a solenoid valve 67 for a pushing cylinder, check valves 68 and 69, and a filter 70 as shown in the figure. Configured. As the solenoid valve for motor 66 and the solenoid valve for push cylinder 67 of this embodiment, a pilot type solenoid valve that operates a master valve (spool) connected to the slave valve by a solenoid valve (spool) that is electromagnetically operated is used. It has been. When the rotating plate 52 is stopped at the original position (FIG. 2A), the hydraulic motor 56 is in a drive stop state, and the motor solenoid valve 66 is in a neutral position. When the pushing plate 53 is stopped at the pushing end position (FIG. 2A), the pushing cylinder 57 is in the extended state, and the pushing cylinder solenoid valve 67 is in the neutral position. In addition, each solenoid valve 66 and 67 can also be a direct acting solenoid valve in which a parent valve (spool) is directly electromagnetically operated.

  The one-cycle stroke operation will be described as the operation of the hydraulic circuit components. When the solenoid 66n of the motor solenoid valve 66 is excited, the pump 64 causes the hydraulic motor 56 to pass through the check valve 68 and the motor solenoid valve 66. When the hydraulic pressure is supplied and the hydraulic motor 56 is driven to rotate forward, the rotating plate 52 rotates (forward). When the rotating plate 52 rotates to the position of approximately 12:00, the solenoid 67s of the pushing cylinder solenoid valve 67 is excited while holding the solenoid 66n in an excited state, and the hydraulic pressure discharged from the hydraulic motor 56 is checked. The hydraulic pressure is supplied to the port 57 s of the push cylinder 57 via the push cylinder electromagnetic valve 67. As a result, the pushing cylinder 57 contracts and the pushing plate 53 is retracted. After the reverse operation is finished, the solenoid 67s is turned off, the push-in cylinder solenoid valve 67 returns to the neutral position, and both ports 57e and 57s of the push-in cylinder 57 are sealed. At that time, the solenoid 66n of the motor solenoid valve 66 is still in an excited state.

  Thereafter, when the rotating plate 52 rotates to the original position, the solenoid 66n of the motor solenoid valve 66 is turned off, the motor solenoid valve 66 returns to the neutral position, and the forward drive of the hydraulic motor 56 is stopped. Subsequently, when the solenoid 67e of the pushing cylinder solenoid valve 67 is excited, the pump 64 supplies hydraulic pressure to the port 57e of the pushing cylinder 57 via the motor solenoid valve 66 and the check valve 69. As a result, the pushing cylinder 57 contracts and the pushing plate 53 is pushed. After the pushing is completed, the solenoid 67e is turned off, the pushing cylinder solenoid valve 67 returns to the neutral position, and both ports 57e and 57s of the pushing cylinder 57 are sealed. In some cases, the rotation of the rotating plate 52 may be stopped by biting dust between the tip 52a and the bottom 3e of the rotating plate 52 while the rotating plate 52 is rotating. In this case, the solenoid 66r of the motor electromagnetic valve 66 is excited, and the hydraulic pressure is supplied to the hydraulic motor 56 by the pump 64 via the check valve 68 and the motor electromagnetic valve 66, and the hydraulic motor 56 is driven in reverse. The rotating plate 52 reverses. Thereby, the bitten dust can be removed.

  Switch boxes SB1 and SB2 are provided at the rear of the left and right side walls 3c of the dust box 3, respectively. On the side surface of the switch box SB1, there is an operation selection switch 42 for outputting an operation command for selecting either the “continuous cycle” or “1 cycle” operation mode as the operation of the push-in plate 8. A start switch 43 for outputting an operation command for starting the operation in each operation mode, and a stop switch 44 as a stop operation means for outputting an operation command for causing the pushing plate 8 to stop the continuous plate operation at the pushing end position P. Are provided. The stop switch 44 is also provided in the switch box SB2. Further, the switch box SB1 is provided with a warm-up mode switch 45 (warm-up operation instructing means) for performing a warm-up operation of the rotating plate 52 during cold weather or the like.

  The control unit of the present embodiment performs at least control in which the rotation plate 52 repeats a combination of movement in one rotation direction (forward rotation) and movement in the other rotation direction (reverse rotation). Thereby, the warming-up operation of the rotating plate 52 is performed in order to smoothly switch the flow path in the motor electromagnetic valve 66 during cold weather or the like. FIG. 4 is a block diagram showing a configuration of a control device 71 including the control unit. The control device 71 is a part of a PLC (programmable logic controller) and includes a CPU, a memory, and the like. The outputs of the first to fourth proximity switches described above are input to the control device 71. In addition, operation commands for the operation selection switch 42, the start switch 43, the stop switch 44, and the warm-up mode switch 45 of the switch box SB1 and the operation commands of the weighing switch 46 and the tare weight switch 47 of the switch box SB2 are input to the control device 71. Is done. The motor solenoid valve 66 and the pushing cylinder solenoid valve 67 are excited by the control device 71.

  Next, the operation related to the warming-up operation as seen from the control device 71 side of the garbage truck configured as described above will be described with reference to the flowchart of FIG. Note that when the worker turns on the warm-up mode switch 45, the warm-up operation starts as follows. However, during the dust loading operation or during the movement of the rotary plate 52 or the push-in plate 53 by another instruction, the worker It is set so that the warm-up operation is not started even when the warm-up mode switch 45 is turned on.

In FIG. 5, the CPU of the control device 71 (hereinafter simply referred to as “CPU”) waits for the warm-up mode switch 45 to be turned on when processing starts (step S <b> 1). Next, it is determined whether or not dust is being loaded (step S2). If it is being loaded, the process is terminated. When not being loaded, the rotary plate 52 is aligned. By this alignment, the rotating plate 52 rotates so as to be approximately at 6 o'clock while being separated from the pushing plate 53. Specifically, when the second proximity switch 61 is in the detection ON state, that is, when the rotating plate 52 is located immediately before the original position (approximately 9 o'clock position) in a clockwise direction from the position coincident with approximately 6 o'clock, The CPU reverses the rotating plate 52 in the direction T1 shown in FIG. 6A (steps S3 and S4). However, if the rotating plate 52 is in a position that coincides with approximately 6 o'clock, the reverse rotation is not naturally performed.
Further, when the second proximity switch 61 is in the detection off state and the first proximity switch 60 is in the detection on state, that is, the rotating plate 52 is rotated clockwise from the original position (approximately 9 o'clock position) to the standing position (approximately 12 o'clock). The CPU reverses the rotating plate 52 in the direction T1 shown in FIG. 6B (steps S3, S5, S4).
When the second proximity switch 61 is off and the first proximity switch 60 is off, that is, the rotary plate 52 is about 6 o'clock clockwise from the position beyond the standing position (about 12 o'clock). If it is just before the position, the CPU rotates the rotating plate 52 in the forward direction in the direction T2 shown in FIG. 6C (steps S3, S5, S6).
Next, as shown in FIG. 6D, the CPU swings the pushing plate 53 forward to the pushing end position P (step S7). In the meantime, by continuing to extend the pushing cylinder 57, it is possible to prevent the pushing plate 53 from moving backward and coming into contact with the rotating plate 52 during the warming-up operation.

Next, the CPU performs a movement r1 in the forward rotation direction of the rotating plate 52 shown in FIG. 7A (steps S8 to S11). At this time, first, the rotating plate 52 rotates forward (step S8). Next, the detection of the first proximity switch 60 is determined (step S9). If the detection is off, it is determined whether 0.9 second has elapsed after the start of forward rotation (step S10). If 0.9 seconds have not elapsed, the process returns to step S8, and if 0.9 seconds have elapsed, normal rotation of the rotating plate 52 is stopped (step S11).
On the other hand, when the detection is ON in step S9, that is, when the rotating plate 52 reaches the original position (approximately 9 o'clock position), the CPU stops the rotating plate 52 and then reverses it to approximately 6 o'clock position. (Steps S12 and S13). In this case, the process proceeds to step S20 below.

After step S11, the CPU performs a reverse movement r2 shown in FIG. 7B (steps S14 to S17). At this time, first, the rotating plate 52 reverses (step S14). Next, the detection of the second proximity switch 61 is determined (step S15). If the detection is on, it is determined whether 0.8 seconds have elapsed after the start of reverse rotation (step S16). If 0.8 seconds have not elapsed, the process returns to step S14, and if 0.8 seconds have elapsed, the reverse rotation of the rotating plate 52 is stopped (step S17).
On the other hand, if the detection is OFF in step S15, that is, if the rotating plate 52 reaches the approximately 6 o'clock position, the CPU stops the rotating plate 52 and then rotates it forward to return to the approximately 6 o'clock position (step S18, S19). In this case, the process proceeds to step S20 below.

  Subsequently, when the warm-up mode switch 45 is kept on (step S20), the movement and other operations are performed again (steps S7 to S10). If the ON state of the warm-up mode switch 45 is not continued at this time, the process is terminated.

  Through the series of processes, the CPU performs the forward movement r1 and stop of the rotating plate 52 shown in FIG. 7A and the reverse movement r2 and stop shown in FIG. 7B. As shown in FIG. 8, the movement of the rotary plate 52 is caused by the front region in the inside of the dust throwing box 3 with respect to the lower support shaft 54 (frontward from the virtual vertical plane passing through the axis of the lower support shaft 54. Region, that is, the region from 6 o'clock to 12 o'clock) is performed in the warm air region X from approximately 6 o'clock to approximately 9 o'clock. The warm air region X is at least in the upper edge portion 3a1 and the lower edge portion 3a2 (in this embodiment, the lower cover 41 (shown by a broken line in FIG. 8)) in the horizontal direction. This is a part of the area excluding the inlet side area Y, which is a fan-shaped range connecting the support shaft 54 and the upper surface front end.

  Further, the warm air region X is a bottom region Z (that is, the tip of the rotating plate 52) that is a fan-shaped range connecting the arc-shaped bottom 3e formed in the dust box 3 and the support shaft 54 as shown in FIG. The part 52a is also a part of the region along the bottom 3e. In the bottom region Z including the warm air region X, the leading end 52a of the rotating plate 52 is covered with the bottom 3e when the rotating plate 52 is moved, so there is no possibility that the moving leading end 52a and the operator are in contact with each other. The warm air region X is also a part of a facing region that faces the inlet side region Y across the lower support shaft 54. The “opposite regions facing each other with the lower support shaft 54 interposed therebetween” is not limited to only regions having an axially symmetric relationship with respect to the lower support shaft 54 (axis thereof), and at least the regions are An area that is further expanded in the clockwise direction or counterclockwise direction from the area. For example, the front area corresponds to the facing area.

  Here, a line (indicated by a one-dot chain line in FIG. 8) connecting the lower support shaft 54 (the axis thereof) and the approximately 9 o'clock position is a “normal boundary line”, and the lower support shaft 54 (the axis thereof) and A line (shown by a one-dot chain line in FIG. 8) connecting the position at about 6 o'clock is defined as a “reverse boundary line”. When the rotating plate 52 rotates forward and exceeds the forward rotation boundary line, the CPU reverses the rotating plate 52 and returns it to the approximately 6 o'clock position as in steps S9, S12, and S13. On the other hand, when the rotating plate 52 is reversed and exceeds the reverse boundary line, the CPU rotates the rotating plate 52 forward and returns it to the approximately 6 o'clock position as in steps S15, S18, and S19. For this reason, the movement of the rotating plate 52 is always performed in the warm air region X.

In the present embodiment, the forward rotation direction is moved for 0.9 seconds (about 35 ° in angle) (steps S8 to S11), and then the reverse rotation direction is moved for 0.8 seconds (angle is about 30 °). (Steps S14 to S17). That is, for this movement, the CPU moves in the warm air region X in the direction in which the tip 52a of the rotating plate 52 rises, that is, the tip in the clockwise direction of the inlet port side region Y (the lower end shown in FIG. 8). ) In the direction away from (the distance corresponding to the forward movement r1 shown in FIG. 7A) is closer to the direction in which the tip 52a descends, that is, the inlet side region Y. Control is performed so as to be larger than the movement distance in the direction (distance corresponding to the movement r2 in the reverse direction shown in FIG. 7B).
Since the movement in the forward rotation direction is set to be larger than the movement in the reverse rotation direction in this way, the spool (the parent valve and the child valve) built in the motor electromagnetic valve 66 at the beginning of the warm-up operation in cold weather is started. ) Does not move smoothly, and even when a time lag occurs in the movement stop in the reverse rotation direction (stop is delayed), the displacement of the rotating plate 52 in the reverse rotation direction is absorbed by the movement in the normal rotation direction. 7 (see the locus of the rotating plate 52 indicated by the solid line and the broken line in FIG. 7B), it is difficult to shift in the reverse direction with a rotation amount larger than the rotation amount returned in the reverse rotation direction as the rotation plate 52 rotates forward. Become. For this reason, as shown in FIG. 8, the rotating plate 52 moves in the rear region with reference to the lower support shaft 54 in the dust input box 3, particularly in the input port side region Y corresponding to the input port 3a. In this embodiment, there is a possibility that the worker will come into contact with the moving rotating plate 52 and a part or all of the worker's body may be caught in the garbage throwing box 3. Since the rotating plate 52 moves in the warm air region X that does not coincide with the inlet side region Y, the possibility of the operator's entrainment can be reduced. The movement in the forward rotation direction at this time corresponds to “movement in a direction away from one end in the circumferential direction of the inlet port area Y”. In addition, as a region that is dangerous for the operator and the rotation plate 52 should be prevented from moving during the warming-up operation, the rear side of the lower support shaft 54 (the lower support shaft 54 is used as a reference) in addition to the inlet side region Y. 12 o'clock to 6 o'clock region (that is, a region behind the virtual vertical plane passing through the axis of the lower support shaft 54) having a semicircular shape with a 180 ° spread at the inlet 3a side). , A 12 o'clock to 5 o'clock region having a fan-shaped spread of less than 180 ° (that is, an area where the lower support shaft 54 extends further rearward than the 12 o'clock to 6 o'clock region), 1 o'clock to 6 o'clock area (that is, an area where the upper portion of the lower support shaft 54 extends further rearward than the 12 o'clock to 6 o'clock area), and 1 o'clock to 5 o'clock area (that is, the above 12 o'clock). The upper and lower parts of the lower support shaft 54 are further expanded rearward than the area at 6:00. A stretched region) can be illustrated. It is desirable that the warm air region X is set so as not to overlap these regions.

  When the warm-up operation is performed as shown in the flowchart (FIG. 5), the hydraulic oil existing in the section between the hydraulic motor 56 and the tank 63 in the hydraulic circuit shown in FIG. Increases the temperature and decreases the viscosity. Then, by repeating the movement r1 and stop in the forward direction and the movement r2 and stop in the reverse direction, the circumference of the spool (parent valve and child valve) inside the motor solenoid valve 66, the pilot oil passage, the hydraulic pressure The operating oil whose temperature has risen circulates around the internal mechanism of the motor 56. Therefore, after the warm-up operation, when the control device 71 issues a signal for controlling the motor electromagnetic valve 66 to stop the rotating plate 52, the valve body (spool) built in the motor electromagnetic valve 66 is smooth. Therefore, there is almost no time lag until the movement is completed. For this reason, it is possible to suppress the inconvenience that the rotating plate 52 and the pushing plate 53 interfere with each other, which has conventionally occurred during cold weather.

  As mentioned above, although one embodiment was taken up and explained per the present invention, the present invention is not limited to the above-mentioned embodiment. For example, the pushing plate 53 swings around the upper support shaft 55 in the above-described embodiment. However, the pushing plate 53 is not limited to this. For example, the pushing plate 53 reciprocates or rotates in a linear direction or an arc direction. It can also be configured to.

  In addition, the control unit is usually a part of the control device that controls the entire garbage truck, but a dedicated control unit for the loading device can also be provided separately. Moreover, the control part of this invention is also realizable by rewriting a program with respect to the existing control part.

  In the embodiment, the detection unit detects whether or not the rotating plate 52 exists in the warm-up region X by the first proximity switch 60 and performs the warm-up operation within the range, but is not limited thereto. . For example, the detection unit detects whether or not the rotary plate 52 is present in the inlet side region Y, and based on the detection result, the control unit controls to stop the warm-up operation in the range of the inlet side region Y, The rotary plate 52 may be controlled to be removed from the inlet side region Y. In the above embodiment, the presence of the rotating plate 52 in each region (for example, the warm air region X and the inlet side region Y) is detected by one proximity switch, but the present invention is not limited to this. For example, detection may be performed using two or more proximity switches. Various switches other than the proximity switch may be used as the detection unit.

  In the above-described embodiment, the warm-up operation is started by the warm-up mode switch 45 serving as the warm-up operation instruction means that is manually turned on, but the present invention is not limited to this. For example, in conjunction with a temperature sensor that detects the temperature of hydraulic oil and the ambient temperature of the garbage truck, it automatically turns on when the start switch 43 for outputting an operation command is turned on when a warm-up operation is required. It is possible to configure so that the warm-up operation is started. Also, the end of the warming-up operation can be configured to detect the temperature or viscosity of the hydraulic oil or to automatically end after a predetermined time has elapsed (for example, 1 minute) from the start of the warming-up operation.

  In the above embodiment, the forward movement r1 of the rotating plate 52 shown in FIG. 7A and the backward movement r2 shown in FIG. 7B are alternately repeated once. However, the present invention is not limited to this, and a configuration in which the movement r1 in the normal rotation direction and the movement r2 in the reverse rotation direction are combined during the warm-up operation can be configured. For example, after rotating the forward rotation direction r1 once, the rotating plate 52 is temporarily stopped, and after further repeating the forward rotation direction movement r1 once or more, the reverse rotation direction movement r2 is performed. The rotating plate 52 can be temporarily stopped after one rotation, and then the movement r2 in the reverse rotation direction can be further repeated once or more (forward rotation-stop-forward rotation-forward rotation-stop). Followed by reverse rotation-stop-reverse rotation ... reverse rotation-stop). In this case, the number of repetitions of only the movement r1 in the forward rotation direction and the number of repetitions of the movement r2 in the reverse rotation direction can be arbitrarily combined.

  In the above embodiment, the rotation plate 52 is moved in the forward rotation direction for 0.9 seconds and moved in the reverse rotation direction for 0.8 seconds. In other words, the forward movement is configured to be performed for a longer time than the reverse movement, but is not limited thereto. For example, it is possible to configure the movement in the forward direction and the movement in the reverse direction in the same time, and it is also possible to configure the movement in the reverse direction for a long time compared to the movement in the forward direction. When moving in the reverse direction for a long time compared to moving in the normal direction, it is difficult to approach the charging port if the warm-up operation is started from the original position (approximately 9 o'clock position). In this case, the movement in the reverse direction corresponds to “movement in a direction away from one end in the circumferential direction of the inlet side region Y”.

  In addition, the “movement” corresponds to a rotation up to the warm air region X of the rotating plate 52 (in the embodiment, the rotation is 90 ° in angle and about 2.3 seconds in time).

  Moreover, in the said embodiment, although the movement of the rotating plate 52 at the time of warming-up operation shall be performed in the warming area | region X (refer FIG. 8) from about 6 o'clock to about 9 o'clock, the lower support in the inside of the dust input box 3 is carried out. Of the front region with reference to the shaft 54, it may be performed in a region wider than the embodiment including the warm air region X or in a region different from the embodiment not including the warm air region X.

  Further, in the above embodiment, when the first proximity switch 60 is turned on before the movement has passed 0.9 seconds during the forward rotation direction (step S), the CPU immediately reverses the rotating plate 52. If the second proximity switch 61 is turned off by the time the movement is in the reverse direction and 0.8 seconds have elapsed during the movement in the reverse rotation direction, the CPU immediately turns to the rotating plate 52. Although it is comprised so that it may rotate forward and return to the position of about 6 o'clock, it is not limited to this. For example, when the first proximity switch 60 is turned on after the movement in the reverse rotation direction is made for 0.8 seconds irrespective of the fact that the rotary plate 52 has crossed the forward rotation boundary line (see FIG. 8) (rotation) Only when the plate 52 reaches the original position (approximately 9 o'clock position), the CPU can reverse the rotating plate 52 to return it to the approximately 6 o'clock position.

  Also, by providing means (for example, visual display means such as an LED lamp or a display, or auditory display means such as a buzzer or a voice announcement device) indicating that the warm-up operation is being performed, the operator or the like is notified. May be.

DESCRIPTION OF SYMBOLS 1 Dust collection truck 2 Dust storage box 3 Dust input box 52 Rotating plate 53 Pushing plate 54 Support shaft, lower support shaft 60 Detection unit, first proximity switch 61 detection unit, second proximity switch 66 Hydraulic valve, electromagnetic valve for motor r1 Movement in one rotation direction, movement in the forward rotation direction r2 Movement in the other rotation direction, movement in the reverse rotation direction X Warm-up area Y Input port side area

Claims (6)

A dust container comprising: a dust container; and a dust container having a loading device that is connected to the rear of the dust container, and that moves the dust charged from the dust container into the dust container. A collection car,
The loading device is:
A rotating plate that is located in the dust throwing box and that rotates around a support shaft that extends in the width direction of the dust throwing box in response to a hydraulic driving force;
A pushing plate that is located in the dust throwing box and moves in the front-rear direction to move the dust pushed up by the rotating plate inside the dust throwing box to the dust containing box;
A control unit that controls at least the rotation of the rotating plate;
A warm-up mode switch operated by an operator to perform warm-up operation of the rotating plate ,
The rotating plate is in a state of rotating in one rotating direction, rotating in the other rotating direction, or stopped by switching a flow path of a hydraulic valve included in a hydraulic circuit that generates the driving force,
The control unit is configured such that, after the warm-up mode switch is turned on by an operator, the rotary plate is the one of the ones except when the dust plate is being loaded or the rotary plate or the push plate is being moved by another instruction . A garbage collection vehicle that controls the switching of the flow path of the hydraulic valve so that the movement in the rotation direction and the movement in the other rotation direction are combined.   The control unit performs an operation in which the movement of the rotating plate in the one rotation direction and the movement in the other rotation direction are combined with at least the upper edge portion of the charging port in the dust charging box. 2. The garbage collection vehicle according to claim 1, wherein switching of the flow path of the hydraulic valve is controlled so that a tip end portion of the rotating plate is not located in an inlet side region between the lower edge portion. Comprising a detector for detecting the rotational position of the rotating plate;
The controller controls the hydraulic pressure based on the detection result of the detection unit so that the rotating plate is positioned in an opposing region facing the input port side region with the support shaft in between in the dust input box. The refuse collection vehicle according to claim 2 which controls switching of a flow path of a valve.   The control unit is configured so that the movement of the rotating plate in the direction away from one end in the circumferential direction of the inlet side region in the facing region is greater than the movement in the direction approaching the one end. The refuse collection vehicle according to claim 3 which controls switching of a flow path of a valve.   The controller first moves the rotating plate to one end in the circumferential direction in the facing region, and after the movement, moves away from one end in the circumferential direction of the inlet side region in the facing region. The refuse collection vehicle according to claim 4, wherein the switching of the flow path of the hydraulic valve is controlled so that the movement and the movement toward the one end are combined. A dust container comprising: a dust container; and a dust container having a loading device that is connected to the rear of the dust container, and that moves the dust charged from the dust container into the dust container. A control device for controlling the operation of the loading device of the collection vehicle;
The loading device is:
A rotating plate that is located in the dust throwing box and that rotates around a support shaft that extends in the width direction of the dust throwing box in response to a hydraulic driving force;
A pushing plate that is located in the dust throwing box and moves in the front-rear direction to move the dust pushed up by the rotating plate inside the dust throwing box to the dust containing box;
A warm-up mode switch operated by an operator to perform warm-up operation of the rotating plate ,
The rotating plate is in a state of rotating in one rotating direction, rotating in the other rotating direction, or stopped by switching a flow path of a hydraulic valve included in a hydraulic circuit that generates the driving force,
The control device is configured such that, after the warm-up mode switch is turned on by an operator, the rotary plate is the one of the ones except when the dust plate is being loaded or the rotary plate or the push plate is being moved by another instruction . A control device for a garbage collection vehicle that controls switching of the flow path of the hydraulic valve so as to perform a combined operation of movement in a rotation direction and movement in the other rotation direction.

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