JP2565755B2 - Dust pushing control device for dust trucks - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-pushing control device for a garbage truck, and more specifically, to a duster mounted on a packer connected to a garbage storage box of a garbage truck that collects dust. The present invention relates to a dust-pushing control device capable of storing dust in a dust container by performing a cycle motion of the push-up plate ascending / descending and forward / reverse.

[Conventional technology]

There is a cycle motion control device as described in Japanese Patent Publication No. 51-48555 for controlling the cycle motion mechanism of the pushing plate in the garbage truck. In this, a proximity plate is attached to a drive shaft of a fluid pump, and a sensing device is arranged at a position facing the proximity plate. Then, each time the proximity plate approaches the sensing device with the rotation of the fluid pump, a change is given to the high-frequency signal transmitted from the sensing device, so that the rotation speed of the fluid pump can be taken out. I have. A control device that receives a high-frequency signal from the sensing device is used for the cycle motion control of the push-in plate, and the sensing device measures the rotation speed of the fluid pump, and the preset rotation speed and the measured rotation speed set in the control device in advance. Count control is performed by comparing the number with the number, and a cycle motion including predetermined strokes such as reversing, descending, forward rotating, and ascending strokes of the pushing plate is performed. At that time, the dust thrown into the packer is mainly compressed in the descending stroke and the forward stroke of the pushing plate, and is smoothly stored in the dust storage box in the ascending stroke following the forward stroke.

[Problems to be Solved by the Invention]

In recent years, large and hard waste such as an electric washing machine and an electric refrigerator is often introduced as garbage to be thrown into a garbage truck. At that time, the push-in plate controlled by the above-mentioned control device of the count control type does not perform a special movement to press the hard waste that has been thrown in and efficiently collapse it. Especially, since the hard waste is not pressed in the ascending stroke and the movement to continue the crushing is not performed, the amount of the waste left in the packer in the ascending stroke is large, and the dust containing the hard waste is increased. Is difficult to be efficiently stored in the dust container.

The present invention has been made in view of the above problems, and an object thereof is that a pushing plate that has moved from an end position of a normal rotation stroke to an ascending stroke encounters solid waste that has been thrown in during the ascending stroke. At this time, it is an object of the present invention to provide a dust-pushing control device for a dust truck, which can sequentially press and crush the waste at different points and efficiently push a large amount of waste into the dust storage box.

[Means for solving the problem]

As shown in FIG. 1, the present invention is provided with a slider 10 which is mounted inside a packer 3 which is continuously provided at a rear portion of a dust storage box 1 and which is lifted and lowered by a push cylinder 14 and a sweep cylinder which is pivotally supported by the slider 10. Push plate that reverses normally by 13
11, the push cylinder 14 and the sweep cylinder 13 are controlled so that the pushing plate 11 is applied to a dust pushing control device which causes the pushing plate 11 to perform a cycle motion consisting of a reversing stroke A, a descending stroke B, a forward rotation stroke C and an ascending stroke D. The feature is that the waste 34 put into the packer 3 is pressed and crushed, so that the pushing plate 11 is secondly pressed in the middle of the forward rotation process C H2 [see FIG. 6 (a)] or the end position H1. After the start of the ascending stroke, the simultaneous operation of temporarily operating the sweep cylinder 13 and the push cylinder 14 and, after the end of the simultaneous operation, only the push cylinder 14 is temporarily operated to raise the pushing plate 11. The operation command control means 29 [see FIG. 3] for alternately repeating the independent operation is provided.

[Action]

The dust pushing-in control device mounted inside the packer 3 continuously provided at the rear part of the dust storage box 1 is operated by a command signal from the operation command control means 29. That is, the pushing plate 11 pivotally supported by the slider 10 is reversed by the operation of the sweep cylinder 13,
The reverse stroke A, which is the first stroke of the cycle motion, is taken. Waste 34 such as dust is thrown into the packer 3, and the pushing plate 11 enters the descending stroke B by the operation of the push cylinder 14, and the waste 34
The dust is primarily pressed. Then, the sweep cylinder
The forward rotation stroke C is entered by the operation of 13, and the dust is secondarily pressed by the forward rotation of the pressing plate 11. Pushing plate 11 is in the middle of the secondary press H2
When the solid waste 34 is encountered in [see FIG. 6 (a)], a command signal from the operation command control means 29 causes a pushing plate from H2 on the way.
11 shifts to ascending stroke D. Alternatively, when the end position H1 of the forward stroke C is reached, the pushing plate 11 moves to the upstroke D from there. In the ascending stroke D, the pushing plate 11 is actuated by the command signal of the actuation command control means 29 so that the sweep cylinder 13 and the push cylinder 14 are actuated at the same time as if the pushing plate 11 performs forward rotation and ascent simultaneously. FIG. 5 (a)].
After this simultaneous operation is temporarily done, push cylinder 14
Only one of them is actuated and is moved to a single actuation, and after the temporary rise, the next simultaneous actuation is performed. By repeating such simultaneous operation and independent operation in sequence, the pushing plate 11 is returned to the start position of the cycle. As a result, the pushing plate 11 in the ascending stroke D
Solid waste due to the pressing action of several different parts of
34 and the dust that is hardened by being compressed hard are efficiently stored in the dust storage box 1 with a very small amount left in the packer 3.

〔The invention's effect〕

According to the present invention, the sweep cylinder and the push cylinder are operated as if the pushing plate simultaneously performs the forward rotation and the upward movement in the rising stroke of the cycle motion performed by the command signal from the operation command control means. The simultaneous operation and the independent operation by the operation of the push cylinder that only rises after the simultaneous operation can be alternately repeated. As a result, the pushing plate quickly and efficiently presses and crushes the dust containing solid waste by the simultaneous operation in the ascending stroke, following the primary press in the descending stroke and the secondary press in the forward stroke. Can be pushed into the dust container. Therefore, even in the case of counting or time-controlling each process, the solid waste and dust that are thrown in do not remain in the packer without being pushed into the dust storage box.

〔Example〕

Hereinafter, the present invention will be described in detail based on examples.

As shown in FIG. 1, a packer 3 is rotatably connected to a rear upper end of a dust storage box 1 mounted on a frame of a garbage truck by a hinge pin 2, and the packer 3 is lowered. An opening 4 formed in the packer 3 communicates with the inside of the dust container 1. The packer 3 has an input port 5 formed at the rear thereof, and a bottom portion connected to the input port 5 has an arc-shaped compression surface 6 which is depressed downward, and a diagonally upwardly rising portion toward the garbage storage box 1. A guide surface 7 that is continuous with the portion 4 is formed.

The packer 3 accommodates a dust-pushing device that compresses dust and waste 34 and pushes them into the dust-packing box 1.
Hereinafter, the dust pushing mechanism and a device for controlling the mechanism will be described in detail. A guide groove 8 is formed on both side walls of the packer 3 from upper front to lower rear, and a pair of left and right sliders 10 having a pair of guide rollers 9a and 9b are slidably supported in the guide groove 8. There is. A push-in plate 11 is swingably supported by a pivot 12 between the lower ends of the sliders 10 and 10, and the push-in plate 11 is provided in a forward rotation direction between a bracket 11a protruding from the back of the slider 11 and the upper end of the slider 10. And both ends of the sweep cylinder 13 for swinging in the reversing direction are pivotally supported. At the middle of the slider 10 and the lower end of the packer 3, the slider is
Both ends of a push cylinder 14 for vertically moving 10 along the guide groove 8 are pivotally supported. Therefore,
By performing sequence control of the push cylinder 14 and the sweep cylinder 13, for example, as shown by a chain double-dashed line,
It is possible to cause the pushing plate 11 to perform a cycle motion consisting of four steps of a reverse stroke A, a primary stroke descending stroke B, a secondary stamping forward stroke C and an upward stroke D.

2 to 4 show a cycle motion device for causing the pushing plate 11 to perform a cycle motion. In FIG. 2, a fluid pump 17 is connected to a rotary shaft 16 of a power take-off device 15 connected to a traveling engine of a garbage truck, and a cycle shown in FIG. 3 is generated by hydraulic oil discharged from the fluid pump 17. The movement mechanism 18 is operated.

The structure of the cycle motion mechanism 18 will be described with reference to FIG. The push cylinder 14 and the sweep cylinder 13 are respectively provided with independent fluid pumps 17A and 17B, the discharge pipe 19A of the fluid pump 17A is connected to the control valve 20a, and the discharge pipe 19B of the fluid pump 17B is connected to the control valve 20b. There is. The control valve 20a is connected to the rod side chamber 23 and the piston side chamber 24 of the push cylinder 14 via the conduits 21 and 22, and the control valve 20b is connected to the rod side chamber 27 and the piston side chamber 28 of the sweep cylinder 13 via the conduits 25 and 26. It is connected to the. The control valve 20a includes
Solenoids SaB, SaA for switching it to the left port or the right port, and the control valve 20b is provided with solenoids SbB, SbA for switching it to the left and right, respectively, and these solenoids SaA, SaB, SbA, SbB switches the ports of the control valves 20a, 20b which are sequentially operated in one cycle by a command signal from the operation command control means 29 described later,
It controls the operations of the push cylinder 14 and the sweep cylinder 13. The discharge pipes 19A and 19B are provided with a relief valve 32 that opens when the relief pressure is increased to return the hydraulic oil to the tank.
A and 32B are installed.

A rotating plate 16 of a fluid pump 17 shown in FIG. 2 is fixed with, for example, an inverted L-shaped proximity plate 30, and a sensing device 31 is arranged in a position close to and opposed to the proximity plate 30. I have. The number of the proximity plates 30 is not limited to one, and is not shown. For example, a plurality of the proximity plates 30 may be arranged on the circumference. Then, when the proximity plate 30 approaches the sensing device 31 which is a proximity switch due to the rotation of the rotating shaft 16, a change is given to the high frequency transmitted from the proximity switch 31, thereby changing the rotation speed of the fluid pump 17 to a high frequency signal. Can be taken out as

The operation command control means 29 that receives the high-frequency signal transmitted from the proximity switch 31 measures the actual rotation speed of the fluid pump 17, compares the measured rotation speed with a preset rotation speed, that is, When the count number based on the rotation of the fluid pump 17 and the set count number match or exceed, the control valves 20a and 20b of the cycle motion mechanism 18 are instructed to be switched each time.

FIG. 4 shows a schematic structure of the operation command control means 29. This is, for example, a microcomputer, which is not shown, and includes a fixed storage unit, an optional writing storage unit, a central processing unit, and the like. Its function is to crush the waste 34 thrown into the packer 3 by pressing the push button, so that the pushing plate 11 [see FIG. 6 (a)] is secondarily pressed. At the time of entering D, the simultaneous operation by the sweep cylinder 13 and the push cylinder 14 so that it is possible to perform the forward rotation and the upward movement at the same time, and the temporary single operation of only the upward movement after the temporary simultaneous operation is alternately performed. Is to be repeated.

As a concrete configuration thereof, a counting circuit L, an output circuit Q and an output holding circuit M are provided. The counting circuit L is a sensing device 31
Receiving the high-frequency signal transmitted from the CPU and measures the rotation speed, that is, the count number of the fluid pump 17 by a binary method. The output circuit Q outputs an output signal to the output holding circuit M when the actually measured rotation number of the fluid pump 17 measured by the counting circuit L reaches or exceeds a preset set rotation number, that is, a set count number. Has become. The output holding circuit M
Is based on a signal from the output circuit Q, energizes or demagnetizes the solenoids SaA, SaB, SbA, SbB (see FIG. 3) for switching the control valves 20a, 20b, and the fluid pump 17
A rotary solenoid Sr that starts to increase the engine speed in the idling state to generate discharge pressure
y (not shown) is also excited or demagnetized. The output circuit Q also has a function of resetting the count number measured by the counting circuit L to 0 when each count number described later reaches a set maximum value.

In this example, the pushing plate 11 takes a cycle motion consisting of four steps A to D of reversing, descending, forward rotating, and ascending, during which a count number N0 is accumulated as shown in FIG. 5 (a). I am trying to finish one cycle. For example, in the upstroke D, the solenoid SbA is temporarily energized, but the solenoid SaA is energized continuously, so that the push cylinder 14 extends from the accumulated count number N0 of 103 to completion of the cycle. Can be continued until. It should be noted that the count in each step and the like is such that the count number α based on the rotation speed of the fluid pump 17 while the electric signal goes through the control system is added. This count number α is generally different each time because the rotation speed of the fluid pump 17 is not always constant, and the number is 1 or 2.

By the way, the first simultaneous operation in the upstroke D [6th
Fig. (A) and Fig. 5 (a)] are operation command control means 29
Sweep cylinder by command signal preset in
13 and the push cylinder 14 are operated to cause the pushing plate 11 to perform normal rotation and upward movement at the same time. And push plate 11
After the simultaneous operation is completed, the independent operation of only rising is performed, and thereafter, the simultaneous operation and the independent operation are alternately repeated. By the way, in this example, the pushing plate 11 is regulated so as not to be simultaneously operated after the third independent operation is completed.

The pushing plate 11 that performs such an operation has a cumulative count N0.
Is increased to the position W2 where 156 is 156, and in this example, N0 = 156 to 166, that is, from the position W2 to the cycle start position.
A push-in process E is provided to reach W1 so that the waste 34 can be efficiently pushed into the dust container 1 by simultaneous operation. In the ascending stroke D, since the pressurizing time is required to start the push cylinder 14 in the first simultaneous operation of the pushing plate 11, the count number N5 = 5 [Fig. 5 though it is a short time (for example, about 0.4 seconds)]. (See (a)]
The boost dead zone is provided. This is because the piston in the push cylinder 14 shown in FIG. 3 is at the position indicated by the alternate long and two short dashes line at the end of the downward stroke B, the solenoid SaA for raising the pushing plate 11 is activated, and the control valve 20a is at the right port. This is because it takes some time to pressurize the piston side chamber 24 formed by the two-dot chain line piston when the pressure is switched to. Therefore, in the simultaneous operation thereafter, since the inside of the push cylinder 14 is started from the state where the pressure is increased, the pressure increase dead zone is not provided [see FIG. 6 (a)].

When the dead zone has passed, the pushing plate 11 performs substantially the first simultaneous operation up to the set count number N6 = 10, and then only the first rising up to N7 = 7 preset in the operation command control means 29. Shift to independent operation. Then, as in the case where the second simultaneous operation is performed until N6 = 10 and then the second independent operation is performed, a total of three simultaneous operations are repeated. When the pushing plate 11 enters the ascending stroke D, first, only the ascending operation may be performed, and then the first simultaneous operation may be performed [see FIGS. 6 (b) and 5 (b)]. .

Here, the operation which is the main part of the present invention will be described in a visually easy-to-understand manner. In FIG. 6 (a), the two-dot chain line pushing plate 11 that has entered the forward rotation stroke C and is secondarily pressed encounters a hard waste 34 at H2 (count number N4 is 30 for example) on the way. When the push-in plate 11 becomes almost immovable in the forward rotation stroke C, the push-in plate 11 stays until N4 = 39, and the upward stroke D is entered from that position to perform the first simultaneous operation. Alternatively, like the solid line pushing plate 11, when the forward stroke C is completed and the starting position H1 of the ascending stroke D is reached without becoming immobile, the first simultaneous operation is performed from that position. There is. At this time, the solenoid SaA (see FIG. 3) is excited and the solenoid SbA is kept excited, the working oil flows into the piston side chamber 28 of the sweep cylinder 13, and the pushing plate 11 is further rotated toward the indoor surface 7. It gives a pressing force to move. As a result, the pushing plate 11 acts so as to push the hard waste and collapse it as much as possible.

In this way, when the pushing plate 11 enters the first simultaneous operation, substantially the first simultaneous operation (thick solid line) is performed for a period corresponding to N6 = 10 after completion of the count number N5 = 5 described above. . After that, the solenoid SbA is demagnetized for a predetermined N7 = 7 counts, only the push cylinder 14 is operated by the solenoid SaA in the energized state, and the pushing plate 11 is moved only to the upward operation. When the simultaneous operation and the independent operation are alternately performed and the position W2 having the cumulative count N0 = 156 is reached, the pushing plate 11 follows the pressing stroke E to the cycle start position W1 having the cumulative count N0 = 166. Return.

The push-in control device for the dust truck configured as described above operates one cycle including each of the reverse traveling, descending, forward rotating strokes A to C and the ascending stroke D as follows to raise the thrown-in dust. While being pressed and crushed in the process D, the solid waste 34 can be stored in the dust container 1 together with the dust.

As shown in the flowcharts of FIGS. 7 (a) to 7 (c), when a push start command button (not shown) of the dust pushing device in the dust truck is pushed, a start signal is input to the operation command control means 29. . Then, the dust pushing device enters the idle up stroke I, and the rotary solenoid Sry [5th
[See (a)] is excited [S1], and in order to generate the discharge pressure in the fluid pump 17, the engine speed in the idling state starts to increase. Then, counting of the count number N1 of the idle up stroke I is started [S2]. Immediately after the start of counting, N1 has not reached 3, and every time the proximity switch 31 detects a count signal corresponding to the rotation of the fluid pump 17, the count number α is added to N1 in step 2, and N1 is Increase. And N1 ≧
When it becomes 3 [S3], N1 is added to the cumulative count number N0 [S4] and stored in the operation command control means 29 to end the idle-up stroke I. That is, the power take-off device of the garbage truck
15 (see FIG. 2) takes out a large amount of power from the engine, the power is supplied to the fluid pump 17 via the rotary shaft 16, and after a predetermined time has elapsed, the fluid pump 17 is brought into a steady operation at a specified rotation speed. As described above, each time the proximity plate 30 that rotates on the front surface of the proximity switch 31 approaches, the high-frequency signal for each rotation of the fluid pump 17 changes, and the number of changes is counted. Note that N1 = N1 + α in step 3 means that the number of rotations of the rotary shaft 16 during the circulation of the electric signal is not always the same, so the detected count number is added as α. It is as described above.

Then, N1 is cleared [S5], and the operation command control means 29
The solenoid SbB is excited by the command signal of [S6], pushing plate 1
1 starts the reversing stroke A from the start position W1 of the cycle [see FIG. 6 (a)]. The counting of the count number N2 of the inversion process A is started [S7]. Third by exciting solenoid SbB
The control valve 20b shown in the figure is switched to the left port, and the hydraulic oil from the fluid pump 17B is supplied to the rod side chamber 27 (see FIG. 3) of the sweep cylinder 13. As shown in FIG. 8 (a), the sweep cylinder 13 is contracted, and the pushing plate 11 is inverted in the direction away from the dust container 1 and becomes substantially horizontal. In this state, dust and waste are thrown into the packer 3 from the throwing port 5. When the count reaches 23 [S
8], the inversion process A is completed, N2 is added to the cumulative count number N0 [S9], N2 is cleared [S10], and
The solenoid SbB is demagnetized [S11].

Next, in response to the command signal from the operation command control means 29, the solenoid Sa
B is excited [S12], and the control valve 20b is returned to the neutral position by the demagnetization of the solenoid SbB, while the control valve 20a is switched to the left port. The hydraulic oil of the fluid pump 17A is supplied to the rod side chamber 23 of the push cylinder 14, and the pushing plate 11 starts descending as the push cylinder 14 contracts. As shown in FIG. 8B, the slider 10 is moved integrally with the pushing plate 11 along the guide groove 8 by contraction of the push cylinder 14. At the same time, counting of the count number N3 of the descending stroke B is started [S13], and it is determined whether the count number N3 of the pushing plate 11 has reached 38 [S14]. When N3 ≧ 38, the piston of the push cylinder 14 in the contracted state is located at the stroke end, and the pushing plate 11 ends the descending stroke B. Then, N3 is added to the cumulative count number N0 [S1
5) and N3 is cleared [S16], and the solenoid
SaB is demagnetized [S17], and the control valve 20a is returned to the neutral position.

Then, the solenoid SbA is excited [S18], and the control valve 20
b is switched to the port on the right, and as shown in FIG. 8 (c), the hydraulic oil from the fluid pump 17B is transferred to the piston side chamber 28.
As shown in FIG. 3, the sweep cylinder 13 is extended and the pushing plate 11 moves to the forward rotation stroke C. At the same time, forward stroke C
The counting of the count number N4 is started [S19]. The pushing plate 11 follows the path of the forward rotation stroke C, and during the forward rotation, the pushing plate 11
If the hard waste 34 is not encountered, the count number α during that time is added, and the normal rotation is continued until the count number N4 exceeds 39. On the other hand, when the pushing plate 11 encounters the hard waste 34, the pushing plate 11 becomes immobile. The two-dot chain line pushing plate 11 shown in FIG.
When it stops at the position of N4 = 30, it stands by until the count number N4 reaches 39 at that position. And N4 ≧ 39
Then, [S20], N4 is added to the cumulative count N0 [S
21] and N4 are cleared [S22].

Next, the flag X indicating the number of times the push-in plate 11 has simultaneously actuated in the ascending stroke D is set to 0 [S23], and the command signal from the actuation command control means 29 causes the solenoid SbA to remain in the excited state, while the solenoid SaA is excited [S24], the control valve 20a is switched to the right port as shown in FIG. 8 (d), the right port of the control valve 20b is maintained, and the push cylinder 14 and the sweep cylinder 13 are Stretch together. Here, as shown in FIG. 7B, the count of the dead zone count number N5 of the push cylinder 14 is started [S25]. That is, in the first simultaneous operation, the pushing plate allowed based on the dead zone of the push cylinder 14
The immobility state of 11 is for 5 counts.

When N5 ≧ 5 [S26], N5 is added to the cumulative count N0 [S27], and N5 is cleared [S28]. After this immobile state, the pushing plate 11 enters the first substantially simultaneous operation and rises, while the extension of the sweep cylinder 13 exerts a pressing force toward the guide surface 7. Then, counting of the count number N6 in the simultaneous operation is started [S29]. In this example, the count number N6 is up to 10, and when N6 ≧ 10 [S30], N6 is added to the cumulative count number N0 [S31], N6
Is cleared [S32]. Subsequently, since the push-in plate 11 has simultaneously operated at the beginning of the ascending stroke D, the flag X indicating the number of simultaneous operations is set to 1 [S33]. In this example, since the simultaneous operation is restricted to three times, it is asked whether X is 3 or more [S34]. Since X is 1, while the solenoid SbA is demagnetized [S35], the energized state of the solenoid SaA is maintained,
The push cylinder 11 causes the push-in plate 11 to start an independent operation of only raising.

Counting of the number of independent operation N7 is started [S2
6], when N7 ≧ 7 [S37], N7 is added to the cumulative count N0 [S38], and N7 is cleared [S39]. solenoid
While SbA is excited [S40], the energized state of the solenoid SaA is maintained, so the push-in plate 11 enters the second simultaneous operation and proceeds from step 29 to step 33, and the simultaneous operation number flag X is set. 1 is added. Then, after a single operation, the third simultaneous operation is started. Further, when the third simultaneous operation is completed, X = 3 is set [S33], and FIG. 7 (c).
As shown in, the solenoid SbA is demagnetized [S41], and the pushing plate 11 starts the independent operation of only raising. Then, counting of the cumulative count N0 is started [S42], and the cumulative count N0 is continued until reaching the count number 156 which reaches the position W2 at which the pushing stroke E [see FIG. 6 (a)] is started. And N0
When ≧ 156 (S43), the pushing plate 11 reaches the position W2, and the solenoid SbA is excited in addition to the excited state SaA (S4
Four〕. By the excitation, as shown in FIG. 8 (d),
Push plate 11 enters push stroke E and the cumulative count
The count of N0 is continued [S45] and is continued until the cycle start position W1 at which the pushing stroke E ends. Count number 166
When [S46] is reached, the solenoids SaA and SbA are both demagnetized [S47] and the cumulative count N0 is cleared [S
48]. Push plate 11 has reached the cycle start position W1,
Further, when the next cycle is performed [S49], the operation is returned to the start shown in FIG. 7 (a), and when the next cycle is not performed, the rotary solenoid Sry is demagnetized [S5
0]. In the above process, the operating states of both cylinders 13 and 14 are visually shown together with the respective count numbers and the like by the time chart of FIG. 5 (b).

As shown in FIG. 6 (b), from the end position H1 or midway H2 of the forward rotation stroke C, even if the first independent operation is first performed and then the first simultaneous operation is performed, the pushing plate 11 can efficiently press and crush the solid waste 34, and can smoothly push the dust containing the crushed waste into the dust storage box 1 [see FIG. 5 (b)].

In the above-described cycle movement of the dust pushing device, the time required for each stroke operation is performed by integrating the count number based on the pump rotation from the proximity switch 31, but instead, each operation is time-controlled. Therefore, a timer may be used to integrate the time in steps 27 and 31 shown in FIG. 7B, for example. The same applies to the other strokes, and the dust pushing device can be operated smoothly.

Further, a limit switch is continuously provided for each of the start position and the end position of the simultaneous operation of the pushing plates 11 performed three times in the ascending stroke D, and instead of the time control by integrating the count number based on the pump rotation as described above, The push plate 11 may be operated simultaneously or independently by using a signal from a limit switch that is operated according to the movement of the push plate 11 as a trigger.

[Brief description of drawings]

FIG. 1 is a side view of the overall configuration of a dust pushing device in a dust truck, FIG. 2 is a schematic perspective view of a measuring unit for detecting a count number based on rotation of a fluid pump, and FIG. 3 is a configuration of a cycle motion mechanism. FIG. 4 and FIG. 4 are schematic configuration diagrams of the operation command control means, and FIGS. 5 (a) and 5 (b) are times in one cycle including operation of the solenoid when the pushing plate repeats simultaneous operation and independent operation in the ascending stroke. 6 (a) and 6 (b) are charts for explaining the operating state of the pushing plate in the ascending stroke, FIGS. 7 (a) to 7 (c) are flowcharts of the cycle movement by the dust pushing device, and FIG. 8 (a). (D) is an operation | movement state figure of the pushing plate of each process including simultaneous operation | movement in an ascending stroke in cycle motion, independent operation, and a pushing stroke. 1 ... dust storage box, 3 ... packer, 10 ... slider, 11
…… Pushing plate, 13 …… Sweep cylinder, 14 …… Push cylinder, 29 …… Operation command control means, 34 …… Waste, A
…… Reverse stroke, B …… Descent stroke, C …… Normal rotation stroke, D ・ ・ ・
… Ascending stroke, H1 …… End position, H2 …… Midway.

Claims (1)

(57) [Claims] 1. A slider mounted inside a packer continuously provided at the rear part of a dust storage box, moved up and down by a push cylinder, a pushing plate pivotally supported by the slider and reversing normally by a sweep cylinder, and the push. To control the cylinder and the sweep cylinder and to cause the pushing plate to perform a cycle motion consisting of a reverse stroke, a descending stroke, a forward stroke and an ascending stroke, in order to press and crush the waste thrown into the packer. , Simultaneous operation of temporarily operating the sweep cylinder and push cylinder at the same time after starting the ascending stroke from the end position or during the forward rotation stroke in which the pushing plate is secondarily pressed, and only the push cylinder after the simultaneous operation is completed. Operation command control hand that alternately repeats the single operation of temporarily operating the A dust-pushing control device for a dust truck, comprising a step.