JP4478463B2 - Garbage truck - Google Patents

Description

  More specifically, the present invention relates to a garbage collection vehicle that collects household garbage and the like in detail, and more particularly, to a garbage storage box using a rotating plate and a pushing plate that are driven by a hydraulic device. It relates to the technology to move.

  In general, a dust input box containing a dust loading device for loading dust into the dust storage box is provided at the rear of the dust storage box mounted on the garbage collection vehicle. The dust box is pivotally supported on the rear upper part of the dust container box, and is raised and lowered by expansion and contraction of the lifting hydraulic cylinder to open and close the rear opening of the dust container box. In addition, a rotary plate that is driven to rotate by a hydraulic motor and a push plate that reciprocally swings back and forth by expansion and contraction of the hydraulic cylinder are provided inside the dust input box. It is designed to be pushed into the garbage storage box.

The position of the rotating plate is detected using a detection member provided integrally with the rotating plate and a non-contact type proximity switch that reacts to the detection member (see, for example, Patent Document 1). That is, the detection member and the proximity switch are set to correspond to the set stop position of the rotating plate, and the section where the proximity switch is turned on is set, and the hydraulic device is controlled based on this to stop the rotating plate at the set stop position. It has become.
JP 2001-97504 A

However, in the garbage collection vehicle, when using in the winter or in cold regions, the oil temperature is low immediately after the start of operation of the hydraulic device, so that a response delay such as valve switching occurs, and the rotating plate stops after the set stop position is exceeded. There is a case. Since the pushing plate is arranged to push in the dust on the rotating plate at the set stop position, if the pushing plate is operated in this state, the rotating plate and the pushing plate may interfere with each other. For this reason, the hydraulic device must be warmed up until the oil temperature rises. Not only is the efficiency of the loading operation inferior, the operator is forced to operate a button for controlling the warming up operation. Irrespective of this, various problems arise in that exhaust gas is discharged from the prime mover.
Further, when a large amount of dust is scraped up at a time, the force required to drive the rotating plate increases, and the rotating plate may stop before the set stop position. In this case, although the dust is not sufficiently lifted up, it is pushed in by the pushing plate, and the efficiency of the dust loading work may be lowered.

  This invention is made | formed in view of the said situation, The place made into the objective is to provide the garbage truck which can stop a rotary plate to a setting stop position exactly.

In order to achieve the above object, according to the first aspect of the present invention, the dust thrown into the dust throwing-in box is scraped up to the set stop position by a rotatable rotating plate driven by a hydraulic device, and is installed swingably. In the refuse collection vehicle pushed into the dust container by the pushed pushing plate, the position detecting means for detecting the rotating position of the rotating plate at an arbitrary position, and the rotation based on the rotating position detected by the position detecting means. Control means for controlling the hydraulic device so that the plate stops at the set stop position, and the control means controls the hydraulic device when the rotating plate stops from the set stop position. And a position correcting unit that controls and moves the rotating plate to the set stop position by lowering the rotational speed of the rotating plate than when the dust is scraped up to the stop .

According to the first aspect of the present invention, by using the position detecting means for detecting the rotational position of the rotating plate at an arbitrary position, the accuracy of detecting the stop position of the rotating plate is improved as compared with a conventional proximity switch or the like. In addition, the position of the rotating plate can be detected at an arbitrary position. As a result, even when the rotating plate does not stop at the set stop position due to changes in the oil viscosity due to the oil temperature or changes in the weight of the dust to be scraped, the amount of deviation of the rotating plate from the set stop position can be accurately detected. Can do.
Therefore, when the hydraulic system starts operating in winter or in cold regions, the oil viscosity increases due to low temperatures, and even if the rotating plate stops beyond the set stop position due to valve response delay, etc., the rotating plate is set correctly. It can be moved to the stop position. Similarly, when a large amount of dust is scraped up at a time, even if the rotary plate stops before the set stop position due to repulsive force from the dust, the rotary plate can be accurately moved to the set stop position. . For the movement of the rotating plate to the set stop position, a hydraulic device for moving the rotating plate may be used as it is, or a driving device such as an electric motor may be separately installed.
In addition, since the rotation position of the rotating plate can be detected at an arbitrary position, for example, by monitoring the moving angle of the rotating plate per unit time, the stop timing of the rotating plate can be set according to the driving state of the rotating plate. Adjustment is also possible, which is extremely advantageous in practical use.

According to the invention described in claim 1, when the rotary plate is stopped out of the set stop position, it can be rotated plate to automatically set the stop position by the hydraulic device moves.

According to the invention described in claim 1, the rotating plate stops exceeds the set stop position, to reach the set stop position rotating plate by lowering the rotational speed. Since the rotational speed is reduced, the angle at which the rotating plate rotates from the stop command to the actual stop position is reduced, and the rotating plate can be accurately stopped at the set stop position.

In the invention described in claim 2, in refuse collection vehicles according to claim 1, wherein the position correction means reduces the driving force of the driving source of the hydraulic system than when splashed in the dust to the stop wherein the reducing the rotational speed of the rotating plate Te.

As a method of returning to the original rotational speed or to reduce the rotational speed of the rotary plate, for example, if the hydraulic system is using power from the prime mover of the vehicle, to the hydraulic system from the engine to engine as idling state A configuration in which the power supply is reduced or the driving speed of the prime mover is increased to the loading speed is preferable. With such a configuration, the flow rate of oil in the hydraulic device can be controlled without increasing the number of parts.

According to the third aspect of the present invention, the dust thrown into the dust throwing box is scraped up to the set stop position by the rotatable rotating plate driven by the hydraulic device, and the dust is accommodated by the swinging push plate. In the garbage collection vehicle pushed into the box, based on the position detection means for detecting the rotation position of the rotation plate at an arbitrary position, and the rotation position detected by the position detection means, the rotation plate is brought to the set stop position. And control means for controlling the hydraulic device so as to stop, and in the loading operation of one cycle, the control means starts transmitting a control signal for stopping the rotating plate to the hydraulic device. In the next one cycle loading operation, a relationship between the rotational position of the rotating plate at the time of rotation and the rotational position of the rotating plate when the rotating plate stops by the control signal is obtained. Calculating the rotational position of the rotary plate starts to transmit a control signal to stop the serial rotation plate and said.

According to the invention described in claim 3, it is possible to detect any rotational position of the rotating plate by position置検detecting means, when starting to transmit a control signal for stopping the output of the rotary plate to the hydraulic unit It is possible to detect the rotation angle from the rotation position of the rotation plate to the rotation position when the rotation plate is stopped by transmitting a control signal. If the rotation position of the rotating plate that starts the transmission of the control signal for stopping the rotating plate at the next loading operation is corrected using this rotation angle, the rotating plate can be stopped closer to the set stop position. It is not necessary to move the rotating plate in order to correct the position, or the movement can be reduced and the efficiency of the loading operation can be improved.

According to the present invention, since the position detecting means is provided to detect the position of the rotating plate, the deviation of the rotating plate from the set stop position is accurately detected, and the rotating plate is moved to the set stop position. The rotating plate can be accurately stopped at the set stop position.
And, for example, when moving the rotating plate to the set stop position, the moving speed is reduced, so the use of a garbage truck reduces the oil temperature that cannot be avoided in winter and cold areas, and the dust that cannot be avoided practically. The shift of the stop position of the rotating plate due to the repulsive force or the like can be accurately prevented. Moreover, since there is no need for warm-up operation of the hydraulic device, the loading operation can be started even when the oil temperature is low, and the loading operation can be performed efficiently.

  1 to 6 show an embodiment of the present invention. FIG. 1 is a schematic side view of a garbage truck, FIG. 2 is a schematic block diagram showing a control system of the garbage truck, and FIG. 3 is a garbage collector. 4 is a rear view of the vehicle, FIG. 4 is an explanatory side view of the dust box regarding the operation state of the ram panel and the conveyor panel (rotary plate), and FIG. 5 is a dust box showing the state where the conveyor panel has stopped beyond the set stop position. FIG. 6 is an explanatory side view of the dust box, showing a state in which the conveyor panel is stopped on the near side of the set stop position.

  As shown in FIG. 1, a dust input box 3 containing a dust loading device for loading dust into the dust storage box 2 is provided at the rear of the dust storage box 2 mounted on the dust collecting vehicle 1. Yes. The dust box 3 is pivotally supported on the rear upper part of the dust container 2 and tilted up and down by the expansion and contraction of the lifting hydraulic cylinder 4 to open and close the rear opening of the dust container 2. . Further, inside the dust box 3, there are a conveyor panel 6 as a rotating plate that is driven to rotate by a hydraulic motor 5, and a ram panel 8 as a pushing plate that reciprocally swings back and forth by expansion and contraction of a swinging hydraulic cylinder 7. Is provided, and the dust thrown into the dust throwing box 3 is pushed into the dust containing box 2.

  The controller 100 controls the raising / lowering of the dust box 3, the rotation of the conveyor panel 6, and the swinging of the ram panel 8. As shown in FIG. 2, the control device 100 controls the operation of each of the electromagnetic hydraulic control valves 9, 10, 11 for switching the hydraulic pressure supplied to the lifting hydraulic cylinder 4, the hydraulic motor 5, and the swinging hydraulic cylinder 7. By doing so, the dust box 3 is raised and lowered, the conveyor panel 6 is rotated, and the ram panel 8 is swung. The hydraulic pressure of the lifting hydraulic cylinder 4, the hydraulic motor 5, and the swinging hydraulic cylinder 7 is supplied by a PTO device 102 that extracts the power of the engine 101 of the garbage collection vehicle 1. That is, the hydraulic device in the present embodiment is configured by the lifting hydraulic cylinder 4, the hydraulic motor, the swing hydraulic cylinder 7, the electromagnetic hydraulic control valves 9, 10, 11, the engine 101, the PTO device 102, and the like. Further, the control device 100 is connected to a proximity switch 12 that detects the raised position of the dust box 3, a rotary encoder 13 that detects the rotational position of the conveyor panel 6, and a proximity switch 14 that detects the forward or backward position of the ram panel 8. The electromagnetic hydraulic control valves 9, 10, and 11 are controlled based on these detection results.

  As shown in FIG. 3, the rotary encoder 13 as the position detecting means is provided on the rotating shaft 6 a of the conveyor panel 6. In the present embodiment, the rotary shaft 6a is installed so as to cross the dust box 3 in the left-right direction, and the rotary encoder 13 is installed at the end of the rotary shaft 6a. That is, as shown in FIG. 3, the rotary encoder 13 is arranged outside the dust box 3. The rotary encoder 13 is the same as that conventionally known, and can detect the rotational position of the conveyor panel 6 over 360 °.

  Each proximity switch 12, 14 detects the approach of a detection member integrally formed with the dust box 3 and the ram panel 8. That is, the proximity switches 12 and 14 are turned on when the detection member approaches, and are turned off when the detection member is not located near the switch. The control device 100 can grasp the movement states of the dust bin 3 and the ram panel 8 by monitoring the switching between the ON state and the OFF state of the proximity switches 12 and 14.

  In this garbage collection vehicle 1, the dust introduced into the dust container 3 is scraped up to the set stop position SP by the conveyor panel 6 rotating along the lower side of the dust container 3, and the dust container 2 by the ram panel 8. It is designed to push in. Specifically, when dust is thrown into the dust throwing box 3, rotation of the conveyor panel 6 is started with the ram panel 8 positioned in front (see FIG. 4A). Then, when the conveyor panel 6 turns upward and reaches the lower side of the dust box 3, the ram panel 8 is moved backward (see FIG. 4B). Next, the conveyor panel 6 is further rotated with the ram panel 8 positioned at the rear, and the dust is scraped up by the conveyor panel 6 (see FIG. 4C). Then, the conveyor panel 6 is stopped at the set stop position SP so that the bottom surface 2a of the dust container 2 and the conveyor panel 6 are substantially flush with each other (see FIG. 4D). In this state, when the ram panel 8 is moved forward along the upper surface of the conveyor panel 6, the dust thus scraped up is pushed into the dust container 2 (see FIG. 4 (e)).

  Correspondingly, the storage unit 100b of the control device 100 stores a conveyor panel stop program 110 that rotates the conveyor panel 6 and stops it at the set stop position SP (see FIG. 2). The conveyor panel stop program 110 is a program for stopping the conveyor panel 6 by controlling the hydraulic motor 5 and the electromagnetic hydraulic control valve 10 based on the rotational position of the conveyor panel 6 detected by the rotary encoder 13. .

  Further, in the storage unit 100b of the control device 100, when the conveyor panel 6 comes off from the set stop position SP and stops, the hydraulic motor 5 and the electromagnetic hydraulic control valve 10 are controlled to reach the set stop position SP. A position correction program 111 to be moved is stored. As shown in FIG. 2, in this embodiment, the position correction program 111 is a reverse direction correction program 111a that rotates the conveyor panel 6 in the reverse direction when the conveyor panel 6 stops beyond the set stop position SP. And a forward direction correction program 111b for further rotating the conveyor panel 6 in the forward direction when the conveyor panel 6 stops on the near side of the set stop position SP.

  The reverse direction correction program 111a is a program for reducing the flow rate of the hydraulic motor 5 and rotating the conveyor panel 6 in the reverse direction. That is, the control device 100 as a control means has a position correction means, and this position correction means changes the rotational speed of the conveyor panel 6 by controlling the driving force of the engine 101 which is a drive source of the hydraulic device. Although the amount of movement of the conveyor panel 6 due to the decrease in flow rate is relatively small, it is sufficient to reversely rotate the conveyor panel 6 by an amount exceeding the set stop position SP as shown in FIG. For example, the flow rate of the hydraulic motor 5 is preferably reduced by reducing the rotational speed by setting the engine 101 in an idling state to reduce the power supply from the engine 101 to the hydraulic motor 5. With such a configuration, the flow rate can be reduced without increasing the number of parts.

  Further, the forward direction correction program 111b drives the hydraulic motor 5 to rotate the conveyor panel 6 forward. In this case as well, the position of the conveyor panel 6 may be adjusted by changing the oil flow rate, as in the case of correction in the reverse direction. Moreover, if it is set as the structure which reduces the rotational speed of the conveyor panel 6 and moves to the setting stop position SP, if the conveyor panel 6 stops exceeding the setting stop position SP, the rotational speed will be reduced and the conveyor panel 6 will stop setting. The position SP is reached. In this case, since the rotational speed is reduced, the angle at which the conveyor panel 6 rotates from the stop command to the actual stop position becomes small, and the conveyor panel 6 can be accurately stopped at the set stop position SP.

  In the garbage collection vehicle 1 configured as described above, by using the rotary encoder 13 for detecting the position of the conveyor panel 6, the accuracy of detecting the position of the conveyor panel 6 is improved as compared with a conventional proximity switch or the like. The position of the conveyor panel 6 can be detected over 360 °. Thus, even when the conveyor panel 6 does not stop at the set stop position SP due to a change in oil viscosity due to the oil temperature or a change in the weight of the dust to be scraped, the deviation amount from the set stop position SP of the conveyor panel 6 is accurately determined. Can be detected well. When the deviation from the set stop position SP is detected by the rotary encoder 13, the control device 100 starts the position correction program 111 and automatically moves the conveyor belt 6 to the set stop position SP.

  Therefore, at the start of operation of the hydraulic motor 5 in winter or in a cold region, the oil viscosity increases due to the low temperature and the valve response delay of the electromagnetic hydraulic control valve 10 occurs, and the conveyor panel 6 sets the set stop position SP as shown in FIG. Even if it is a case where it stops exceeding, the conveyor panel 6 can be moved to setting stop position SP. Similarly, when a large amount of dust is scraped up at a time, even if the conveyor panel 6 stops before the set stop position SP due to a repulsive force from the dust as shown in FIG. It can be moved to the position SP.

  As described above, it is possible to accurately prevent the shift of the stop position of the conveyor panel 6 due to a decrease in oil temperature that cannot be avoided in winter and cold regions, and the repulsive force of dust that cannot be avoided in practice. Further, since there is no need for warm-up operation of the hydraulic motor 5 or the like, the loading operation can be started even in a state where the oil temperature is low, and the loading operation can be performed efficiently.

  Further, since the position of the conveyor panel 6 is detected by the rotary encoder 13, the conveyor panel 6 can be accurately stopped at the set stop position SP. Since the position of the conveyor panel 6 can be detected over 360 °, for example, by monitoring the moving angle of the conveyor panel 6 per unit time, the conveyor panel 6 can be stopped according to the driving state of the hydraulic motor 5. It is also possible to adjust the timing, which is extremely advantageous in practical use.

  In the above embodiment, the rotary encoder 13 is used for detecting the position of the conveyor panel 6, but a potentiometer can also be used. With a potentiometer, the output is changed from the maximum value to the minimum value (or from the minimum value to the maximum value) at a certain position, and at other points, for example, it is changed linearly, so that the position and the output are related in a fixed relationship. The position of the conveyor panel 6 is detected by the output of the potentiometer. Moreover, although what detected the position of the conveyor panel 6 over 360 degrees was shown, you may make it measure the position in a predetermined range from a setting stop position, and shall also be included in arbitrary positions in this case.

  Further, the rotational position of the conveyor panel 6 and the control signal when the position correction program of the embodiment starts to transmit a control signal for stopping the conveyor panel 6 to the hydraulic motor 5 in the loading operation of one cycle. By determining the relationship with the rotational position of the conveyor panel 6 when the conveyor panel 6 stops, the conveyor panel starts transmitting a control signal for stopping the conveyor panel 6 in the next one-cycle loading operation based on this relationship. The rotational position of 6 may be calculated.

  That is, since the rotary encoder 13 can detect an arbitrary rotational position of the conveyor panel 6, the rotational position of the conveyor panel 6 when the control signal for stopping the output to the conveyor panel 6 is started to the hydraulic motor 5 is started. The rotation angle up to the rotation position when the conveyor panel 6 is stopped by the transmission of the control signal can be detected. If the rotational position of the rotating plate that starts transmitting a control signal for stopping the rotating plate at the next loading operation is corrected using this rotational angle, the conveyor panel 6 can be stopped closer to the set stop position SP. It is not necessary to move the conveyor panel 6 to correct the stop position, or the movement can be reduced and the efficiency of the loading operation can be improved.

  In addition, although the flow of the hydraulic motor 5 is decreased to reversely rotate the conveyor panel 6 or the hydraulic motor 5 is used to rotate the conveyor panel 6 forward, the conveyor panel 6 is set to the set stop position SP. The movement may be performed by separately providing a driving device such as an electric motor, and it is needless to say that other detailed structures and the like can be appropriately changed.

It is a side surface model explanatory view of a garbage truck which shows one embodiment of the present invention. It is a schematic block diagram which shows the control system of a refuse collection vehicle. It is a partial rear view of a garbage truck. It is side surface explanatory drawing of the dust box regarding the operation state of a ram panel and a conveyor panel, (a) shows the state where the conveyor panel started rotation, (b) shows the state where the ram panel moves from the front to the back, c) shows a state where dust is scraped up by the conveyor panel, (d) shows a state where the conveyor panel has reached the set stop position, and (e) shows a state where the ram panel pushes the dust into the dust box. . It is side surface explanatory drawing of the dust box which shows the state which the conveyor panel stopped exceeding the setting stop position. It is side surface explanatory drawing of the refuse input box which shows the state which the conveyor panel stopped on the near side of the setting stop position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust collection truck 2 Dust storage box 3 Dust input box 5 Hydraulic motor 6 Conveyor panel 8 Ram panel 10 Electrohydraulic control valve 13 Rotary encoder 100 Controller 100a Arithmetic unit 100b Storage unit 101 Engine 102 PTO device 110 Conveyor panel stop program 111 Position correction Program 111a Reverse rotation correction program 111b Forward rotation correction program SP Setting stop position

Claims (3)

In the garbage collection vehicle, the dust thrown into the dust throwing box is scraped up to the set stop position by a rotatable rotating plate driven by a hydraulic device and pushed into the dust containing box by a swinging push plate.
Position detecting means for detecting the rotational position of the rotating plate at an arbitrary position;
Control means for controlling the hydraulic device so that the rotating plate stops at the set stop position based on the rotational position detected by the position detecting means ,
The control means controls the hydraulic device to lower the rotational speed of the rotating plate than when the dust is being scraped up to the stop when the rotating plate stops from the set stop position. And a position correction means for moving the rotating plate to the set stop position . Said position correcting means, according to claim 1, wherein the reducing the rotational speed of the rotary plate by lowering the driving force of the driving source of scraping up the hydraulic device than when the dust up to the stop Garbage truck. In the garbage collection vehicle, the dust thrown into the dust throwing box is scraped up to the set stop position by a rotatable rotating plate driven by a hydraulic device and pushed into the dust containing box by a swinging push plate.
Position detecting means for detecting the rotational position of the rotating plate at an arbitrary position;
Control means for controlling the hydraulic device so that the rotating plate stops at the set stop position based on the rotational position detected by the position detecting means,
In the loading operation of one cycle, the control means is configured so that the rotating plate is rotated according to the rotation position of the rotating plate and the control signal when the control signal for stopping the rotating plate is started to be transmitted to the hydraulic device. Based on this relationship, the rotational position of the rotating plate that starts transmitting a control signal for stopping the rotating plate in the next one-cycle loading operation is obtained. calculated the dust garbage collection vehicles shall be the feature to be.

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