JP2662732B2 - Dust pushing control device for dust trucks - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dust pushing control device for a garbage truck, and more particularly, to garbage mounted on a packer connected to a garbage container of a garbage truck for collecting trash. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-in device, and more particularly to a dust push-in control device capable of storing dust in a dust storage box by performing a cycle movement with vertical movement and forward / reverse rotation.

[Conventional technology]

To control the cycle movement mechanism of the pushing plate in the garbage truck, a sensing device such as a cam or a limit switch is connected to the movable part of the mechanism, and the control device of the cycle movement is operated by this sensing device. I have. In this control device, since the sensing device is in contact with the movable part, it is liable to be worn, and its cycle movement is disordered,
There is a problem that many sensing devices are required in terms of structure, failures are often generated, and durability is lacking.

To solve this problem, there is a cycle motion control device described in Japanese Patent Publication No. 51-48555. In this method, a proximity plate is arranged on a drive shaft of a fluid pump, and a sensing device is disposed 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 a sensing device is used for controlling the cycle motion of the pressing plate, and the sensing device measures the rotation speed of the fluid pump, and sets the rotation speed set in the control device in advance. The control is performed by comparing the measured rotational speed with the measured rotational speed, and the push plate performs a cycle motion including predetermined strokes such as a reversing, descending, forward rotating, and ascending strokes. that time,
The dust put into the packer is compressed mainly in the downward stroke and the normal rotation stroke of the push plate, and is smoothly stored in the dust storage box in the upward 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 pushing plate controlled by the above-mentioned control device does not perform a special movement so as to press the inputted hard waste and efficiently crush it. There is a problem that it is difficult to be efficiently stored in the storage box.

Further, in the cycle motion of the push plate controlled by the above-described control device, when the push plate that descends or rotates forward encounters hard waste and stops, the fluid pressure increases and the relief valve operates. Will do. The push plate advances to the next stroke after completion of a count based on the rotation of the fluid pump corresponding to all strokes of each stroke preset in the control device or after a lapse of a predetermined time. Since the hydraulic circuit for operating the cylinder and the like is kept at a high pressure state for a long time, problems such as adversely affecting the life of the fluid pump and the like arise.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to crush hard waste put into a packer of a garbage truck by sequentially pressing various places with a pushing plate, and efficiently. A garbage truck that can be pushed into a garbage storage box and, as a result, a hydraulic device such as a cylinder that operates a pushing plate does not maintain a high pressure state for a long time, and can operate a fluid pump or cylinder stably for a long time. An object of the present invention is to provide a refuse pushing control device.

[Means for solving the problem]

As shown in FIG. 1, the present invention comprises a slider 10 mounted inside a packer 3 connected to the rear of the refuse storage box 1 and raised and lowered by a slide cylinder 14, and a pushing plate pivotally supported by the slider 10. The present invention is applied to a dust pushing control device that controls the pushing plate 11 that rotates forward and reverse by the use cylinder 13, the slide cylinder 14 and the pushing plate cylinder 13, and causes the pushing plate 11 to perform a cycle motion.

The characteristic feature is that the waste 34 (see FIG. 6 (a)) put into the packer 3 is pressed by pressing the solid waste 34 in the forward rotation process C in which the pressing plate 11 performs secondary press. In a state where the operating oil pressure rises from the position G where the operating oil pressure suddenly rises in the plate cylinder 13, the pressing plate 11 presses the pushing plate 11 temporarily as it is in the secondary pressing direction to further press the waste, Ca When the predetermined time of the pressing stroke Ca in the state in which the operating oil pressure has risen ends, the temporary raising stroke Ba for temporarily raising the push plate 11 from the end position H of the pressing stroke Ca is performed for a predetermined time. , Its temporary ascent process Ba
From the end position to the forward rotation stroke C for secondary press again, and thereafter, every time the working oil pressure in the push plate cylinder 13 suddenly rises, the inching operation consisting of the pressing stroke and the temporary rising stroke is sequentially performed. After the inching operation is completed, the push plate 11 is provided with an operation command means 29 (see FIG. 3) for completing the remaining forward rotation stroke C.

[Action]

The dust pushing device mounted inside the packer 3 connected to the rear of the dust storage box 1 is operated by a command signal from the operation command means 29. That is, the pushing plate 11 pivotally supported by the slider 10 is reversed by the operation of the pushing plate cylinder 13 to take a reversing stroke A which is the first stroke of the cycle motion. Then, the pushing plate 11 enters the descending stroke B by the operation of the slide cylinder 14, and the dust is primarily pressed by the pushing plate 11 descending. When the descending stroke B is completed, the push plate 11 enters the forward rotation stroke C for secondary pressing by the operation of the push plate cylinder 13, and when the hard waste 34 is encountered,
The working oil pressure in the push plate cylinder 13 sharply rises. At this time, the forward rotation of the pushing plate 11 is blocked,
From the position G where the working oil pressure suddenly rises, the pushing plate
This is the pressing stroke Ca in which the forward rotation operation of 11 is further continued temporarily. When the temporary pressing operation is completed, from the end position H of the pressing stroke Ca, the slide cylinder 14 is operated to temporarily raise the pushing plate 11 by the operation of the slide cylinder 14.
[FIG. 6 (a)] is continued until a predetermined time has elapsed, and then stopped. Again, by operating the push plate cylinder 14,
The push-in plate 11 enters the normal rotation process C and rotates forward to secondary press the different places of the hard waste 34 or the places where the waste does not exist. This operation is sequentially repeated, and the pressing plate 11 can efficiently press and crush the hard waste 34 at different locations. When the inching operation including the predetermined number of pressing steps is completed, the push plate 11 proceeds to the remaining forward rotation step C, and smoothly stores the crushed wastes 34 sequentially in the dust container 1.

〔The invention's effect〕

According to the invention, by the command signal from the operation command means, the pressing time in the forward rotation stroke of the cycle motion while the push plate encounters the hard waste is reduced, and the fluid generated when the high pressure state is continued It is possible to avoid a decrease in durability of hydraulic equipment such as a pump and a cylinder. in addition,
In the forward rotation process, the push plate presses different places one after another, which promotes the crushing of garbage and waste.At that time, the push plate can change its position, for example, by pushing the waste backward. In addition, the pushing into the garbage storage box becomes smoother.

〔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 pushes the dust into the dust storage box 1. Hereinafter, the dust pushing mechanism and a device for controlling the mechanism will be described in detail. Guide grooves 8 are formed on both side walls of the packer 3 from front upper to lower rear. A pair of right and left sliders 10 having a pair of guide rollers 9a and 9b are slidably supported in the guide grooves 8. I have. A push plate 11 is pivotally supported by a pivot 12 between the lower ends of the sliders 10, and a bracket 11 a projecting from the back of the push plate 11 and an upper end of the slider 10 are provided with a push plate 1.
Both ends of a push-plate cylinder 13 for swinging 1 in the normal rotation direction and the reverse direction are pivotally supported. Both ends of a slide cylinder 14 for moving the slider 10 upward along the guide groove 8 are pivotally supported at the middle of the slider 10 and the lower end of the packer 3.

Therefore, for example, by performing sequence control on the slide cylinder 14 and the pressing plate cylinder 13, the reversing process A, the primary pressing descending process B, and the secondary pressing are performed on the pressing plate 11, as shown by the two-dot chain line. It is possible to perform a cycle motion consisting of four strokes, ie, a forward rotation stroke C and a rising stroke D.

FIGS. 2 to 4 show a cycle exerciser for causing the push plate 11 to perform a cycle exercise. In FIG. 2, a fluid pump 17 is connected to a rotating shaft 16 of a power take-off device 15 connected to a traveling engine of a garbage truck, and a hydraulic oil discharged from the fluid pump 17 causes a cycle shown in FIG. The movement mechanism 18 is operated.

The structure of the cycle motion mechanism 18 will be described with reference to FIG. The discharge pipe 19 of the fluid pump 17 is connected to the control valve 20a,
Furthermore, it is connected to the other control valve 20b via the communication pipe 19a. The control valve 20a is connected to the rod side chamber 23 and the piston side chamber 24 of the sliding cylinder 14 via conduits 21 and 22,
The control valve 20b is connected to the rod-side chamber 27 and the piston-side chamber 28 of the push plate cylinder 13 via conduits 25 and 26.The control valve 20a has a solenoid Sa for switching it to a left port or a right port. B, Sa A and the control valve 20b have solenoids Sb B, Sb
A is provided respectively, and these solenoids Sa A, Sa B, S
b A and Sb B switch the ports of the control valves 20a and 20b that are sequentially operated during one cycle by a command signal from an operation command means 29 described later, and control the operations of the slide cylinder 14 and the push plate cylinder 13. . The discharge pipe 19 detects a relief valve 32 that opens when the pressure is raised to the relief pressure and returns the hydraulic oil to the tank, and whether or not the pressure is higher than an inching pressure Pi set to a pressure lower than the relief pressure. A pressure sensor 33 is attached.

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 means 29 for receiving 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, Whenever the count number based on the rotation of the pump 17 matches or exceeds the set count number, the control valve 20a, 20b of the cycle motion mechanism 18 is commanded to switch each time.

FIG. 4 shows a schematic configuration of the operation command 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 push the waste put into the packer 3
Pressing hard waste in the forward rotation process C (see FIG. 6 (a)) where the secondary press 11 presses the cylinder for the pressing plate.
From the position G in FIG. 13 where the working oil pressure rises sharply, the pressing plate 11 is temporarily pressed in the secondary pressing direction as it is in the state where the working oil pressure is increased, and the process shifts to a pressing process Ca in which the waste is further pressed. When the predetermined time of the pressing step Ca in which the operating oil pressure is increased ends, the pressing plate 11 is moved from the position H.
Is temporarily performed for a predetermined time, and the process is shifted from the end position of the temporary rising process Ba to the forward rotation process C for performing secondary press again.
Each time the working oil pressure in the inside 13 rises sharply, an inching operation consisting of a pressing stroke and a temporary rising stroke is sequentially performed, and after the inching operation is completed, the push plate 11 completes the remaining forward rotation stroke C. It has become.

As a specific 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 speed of the fluid pump 17 measured by the counting circuit L reaches or exceeds a preset rotation speed, that is, a preset count number. ing. The output holding circuit M
Is to excite or demagnetize the solenoids Sa A, Sa B, Sb A, Sb B for switching the control valves 20a, 20b based on a signal from the output circuit Q, and to generate a discharge pressure in the fluid pump 17, The rotary solenoid Sry that starts increasing the rotation speed of the engine in the idling state is also excited or demagnetized. The output circuit Q also has a function of resetting the count number measured by the counter circuit L to 0 when each count number described below reaches a set maximum value.

In this example, if the pressing plate 11 takes a cycle movement consisting of four steps A to D of reversing, descending, normal rotation and ascending, and if there is no need to press hard waste in the meantime, FIG. As shown in (1), one cycle is completed by accumulating the count number N0. For example, in the forward rotation process C, the solenoid Sb A is excited to extend the push plate cylinder 13, and during that time, the cumulative count is set to continue for a time corresponding to the count 39 from 65 to 103. Have been. As described later, while the electric signal circulates once in the control system, the count number α based on the rotation of the fluid pump 17 is added. Since the count number α depends on the rotation state of the fluid pump 17, the count number α is not always the same value and generally differs each time.

In the present invention, in the forward rotation process C, the pushing plate
When the hard disk 11 encounters hard waste and the pressure thereof increases the hydraulic pressure applied to the pressure plate cylinder 13 (see FIG. 3) to the set inching pressure Pi or more, the push plate 11 is further corrected from the position G. Press in the turning direction. During this time, the pressing is continued until the predetermined count number is reached, and thereafter, the pressing plate 11 is temporarily raised from the reaching position H, and the crushing of the waste is performed again so that the hard waste is secondarily pressed at a different position. The push plate 11 can be displaced to a possible location. In most cases, when the inching pressure Pi is generated, the hydraulic oil almost immediately reaches the relief pressure Pj, but the pressing stroke Ca is maintained only for a predetermined count.
Is short, and does not adversely affect the fluid pump 17 or the cylinder 13.

Here, the operation forming the main part of the present invention will be described in a more easily understood manner. In FIG. 6 (a), a push plate indicated by a chain line
11 reduces waste 34 by reducing the size of the slide cylinder 14.
Is lowered in the direction of arrow 35 toward. Then, at the position indicated by the two-dot chain line where the primary press is performed, the push plate 11 is in a state where it has finished descending the count number N3 = 38 minutes. Subsequently, the push plate 11 is rotated forward in the direction of the arrow 36 due to the extension of the push plate cylinder 13, and the counting of the count number N4 is started, and the push plate 11 encounters the waste 34 as shown by the solid line.
At this time, if the waste 34 is hard and not crushable, in the state shown in the figure, the piston side chamber of the push plate cylinder 13
28 is boosted. When the pressure Pc detected by the pressure sensor 33 reaches the inching pressure Pi, the count N5 is started at that point. Until the count becomes, for example, 7, the supply of the working oil to the push plate cylinder 13 is continued. At this time, the waste 34 is harder than the position G, and the pressing plate 11 takes a pressing stroke Ca that does not move any more or slightly crushes. Assuming that the push plate 11 further rotates in the direction of the arrow 37 in order to facilitate visual understanding, it continues up to the above-mentioned count number 7. When the count reaches 7, the pressing stroke Ca is terminated, the port of the control valve 20a is switched at the position H, and a separate count (N6 to be described later) is started from that point. Hydraulic oil is supplied to the piston side chamber 24 of the sliding cylinder 14 until the count becomes, for example, twelve. This process is a temporary ascending process Ba of the press plate 11 which reverses a part of the descending process B which is the primary press, and the press plate 11 is a waste press.
The posture can be changed, for example, by moving the waste 34 away from 34 in the direction of the arrow 37 or by pushing the pressed waste 34 backward. In this way, the pressing plate 11 is controlled and its count is
When the count of N6 reaches 12, the extension operation of the slide cylinder 14 is stopped, and the extension operation of the push plate cylinder 13 again causes the inching operation as shown in FIGS. 5 (b) and 6 (b). Is repeated a preset number of times.

The garbage truck push-in control device configured as described above is capable of crushing the input waste 34 by operating as follows in one cycle including the forward rotation process C.

As shown in the flowcharts of FIGS. 7 (a) to 7 (g), when a pushing start command button (not shown) of the dust pushing device in the dust truck is pressed [S1], a start signal is input to the operation command 29. The flag F1 indicating each stroke operation during the cycle movement of the push plate 11 in the dust pushing device is set to 1, F2, F3,
F4 is set to 0 [S2]. It is determined whether or not F1 = 0 (S3), and F1 = 1 is confirmed in step 4, and all count numbers are reset to 0 in the operation command means 29. That is, N1 = 0, N2 = 0,..., N8 = 0, and a pressing plate that is performed when a hard waste 34 is encountered.
X indicating the number of inching operations of 11 is set to 0 [S
Five〕. Next, the flag F1 set to 1 in step 2 is replaced by 2, and the flag F2 set to 0 is replaced by 1 [S6]. Subsequently, it is determined whether or not F2 = 1 (S7). By the way, the flag F2 takes any one of 1 to 5, and goes to an idle-up process I in which the engine speed is increased when F2 = 1, and a reversing process A in which the pushing plate 11 is reversed when F2 = 2.
To the descending stroke B for primary pressing at F2 = 3, to the forward rotation stroke C for secondary pressing at F2 = 4, and to the ascent stroke D including the pushing stroke E at F2 = 5. Has become.

As shown in FIG. 7 (b), by setting the flag F2 = 1, the dust pushing device enters the idle-up stroke I, the count N1 in that stroke is measured, and the rotary solenoid [not shown] is excited [ S8] In order to generate the discharge pressure in the fluid pump 17, the number of revolutions of the engine in the idling state is increased. That is, the power take-off device 15 (see FIG. 2) of the garbage truck takes out large power from the engine, and the power is supplied to the fluid pump 17 via the rotating shaft 16, and after a lapse of a predetermined time, the fluid pump 17 Is assumed to be a steady operation. As described above, each time the proximity plate 30 rotating on the front surface of the proximity switch 31 approaches, the fluid pump 17
The high-frequency signal changes for each rotation, and the number of changes is counted.

Now, immediately after the start of counting and N1 ≧ 3 is not satisfied [S9], every time a count signal corresponding to the rotation of the fluid pump 17 is detected by the proximity switch 31, the count number α is added to the count N1 [S10]. ], And return to step 3 in FIG. The reason that N1 = N1 + α in step 10 is that the detected number of counts is added as α because the rotational speed of the rotary shaft 16 during the circulation of the electric signal is not always the same each time. Is as described above. That is, α may be 1 or 0 or 3. In step 6, F1 becomes 2 and F2
Is replaced by 1, so that the process moves from step 4 to step 11 through step 11.

From step 7 to step 9, the addition of the count N1 [S10] is repeated, and if N1 ≧ 3 [S9], the flag F
2 is set to 2 [S12], and the process returns to step 3. Then, the process traces to step 7, and proceeds from step 13 to step 14 in FIG. 7 (c). Fluid pump between more
The operation 17 is in a steady state, and is in a state in which hydraulic oil at a predetermined pressure can be discharged. Then, the reversing process A, which is the first process of the pushing plate 11, is started. That is, after steps 4, 11, and 7,
At 13 it is confirmed that F2 = 2. Then, only the solenoid Sb B (see FIG. 3) is energized, and the pushing plate 11 enters the reversing stroke A, during which the count N2 is started. When the solenoid Sb B is excited [S14], the control valve 20b shown in FIG.
The hydraulic oil from 7 is pushed into the rod side chamber 27 of the push plate cylinder 13.
[See FIG. 3]. As shown in FIG. 8 (a), the pressing plate cylinder 13 is reduced, and the pressing plate 11 is inverted in a direction away from the trash storage box 1 to be substantially horizontal. In this state, refuse and waste are charged into the packer 3 from the charging port 5.

Since N2 is counted simultaneously with the start of the inversion of the push-in plate 11, the operation is continued until the count number 23 at which the inversion process A is completed is reached. Specifically, in step 15, the count number N2
Is determined to be not the preset 23, α is added to the count N2 every time the proximity switch 31 detects the rotation of the fluid pump 17 [S16]. Then, the process returns to step 3 and proceeds to step 15 via steps 4, 11, 7, 13, and 14, and thereafter, the count N2 is increased by the same operation. Such an operation is repeated, and in step 15, N2 ≧ 23
Is determined, the flag F2 set to 2 is replaced with 3 [S17]. As a result, the process moves to the descending process B as the primary press of the next process.

That is, through steps 4, 11, 7, and 13, at step 18, F2
= 3 is confirmed. Then, the solenoid Sb B (see FIG. 3) is demagnetized [S19], and the solenoid Sa B is energized, so that the pushing plate 11 goes down the stroke B, and the counting of the count N3 is started during that. When the solenoid Sa B is excited [S20], the control valve 20a shown in FIG. 3 is switched to the left port, and the hydraulic oil from the fluid pump 17 is supplied to the rod side chamber 23 of the slide cylinder 14 (see FIG. 3). I do. Then, as shown in FIG. 8 (b), the slide cylinder 14 is reduced, the slider 10 is moved along the guide groove 8 integrally with the push plate 11, and the push plate 11 starts to descend.
In this example, even if the pressing plate 11 encounters the waste 34 in the descending stroke B of the primary press, the waste 34 is described as being soft or easily broken by pressing. That is, it is assumed that the descending stroke B is completed at N3 = 38 counts as shown in FIG. 6 (b).

Since N3 is counted at the same time when the pressing plate 11 starts lowering, it continues until the count number 38 at which the lowering stroke B ends is reached. Specifically, in step 21, the count number N3
Is determined to be not the preset 38, α is added to the count number N3 every time the proximity switch 31 detects the rotation of the fluid pump 17 [S22]. Then, the process returns to step 3 and proceeds to step 21 via steps 4, 11, 7, 13, and 18, and thereafter, the count N3 is increased by the same operation. When such an operation is repeated and it is determined in step 21 that N3 ≧ 38, the flag F2 set to 3 is replaced with 4 (S23). As a result, the process proceeds to the forward rotation process C as a secondary press of the next process.

In this example, the pressing plate 11 is hard waste in the front stroke C.
When the inching operation is performed by colliding with 34 (see FIG. 6 (a)), if necessary, a temporary ascent stroke Ba of the push plate 11 which reverses the descending stroke is performed. But,
Here, the case where the waste 34 is soft and crushable will be described. Since F2 = 4 has been replaced, the process returns to step 3 and proceeds from step 4 to steps 11, 7, and 1.
After 3 and 18, the process proceeds to step 24, where it is confirmed that the flag F2 is 4. As shown in FIG. 7 (e), first, the solenoid Sa B is demagnetized [S25], while the solenoid Sa B is demagnetized.
A is also demagnetized [S26]. Subsequently, it is determined whether or not the flag F3 is 0 [S27]. Since F3 is set to 0 in step 2, the solenoid Sa A (see FIG. 3) is excited [S2].
8], and as shown in FIG.
Extend, and the pushing plate 11 starts normal rotation.

Here, measurement of the count number N4 for controlling the forward rotation process C is started. If the waste 34 is soft or easily broken by pressing, the pressure Pc of the hydraulic oil in the cylinder 13 for the pushing plate does not become too high. Therefore, if the pressure Pc detected by the pressure sensor 33 is lower than the inching pressure Pi [S29], N5 indicating the count number of the pressing stroke Ca remains 0 [S30].
The state of 3 = 0 is maintained [S31], and the pushing plate 11 is moved in the forward rotation stroke C.
Then, it is determined whether or not the count number N4 after shifting to has reached 39 [S32]. The count number α is added to the count number N4 by the signal from the proximity switch 31 (S3
3], and return to step 3. Then, the count number N4 is increased while following the same route. In this way, if N4 ≧ 39 in step 32, the flag F2 set to 4
Is replaced with 5 [S34]. Then, the process returns to Step 3 and follows Steps 7, 11, 13, 18, and 24 to reach Step 35. As a result, the operation command means 29 issues a movement command to the next stroke, the ascent stroke D. That is, as shown in FIG. 7 (g), the solenoid Sb A is demagnetized [S51], and the solenoid Sa A is excited [S54], the control valve 20b is set to neutral, and the control valve 20a is switched to the right port [ FIG. 8 (d)]. Thus, the pushing plate 11 shifts to the ascent stroke D.

Next, when the waste 34 is hard to be crushed and the pushing plate 11 cannot continuously shift to the count number N4 of 39 in the forward rotation process C for secondary pressing, that is, the core of the present invention. The operation will be described.

For example, when the push plate 11 encounters the hard waste 34 into which the push plate 11 is put and the count number N4 is 22 (see FIG. 6 (b)), and if the waste 34 is not crushed, the piston side chamber 28 of the push plate cylinder 13 is not damaged.
The pressure of [see FIG. 3] increases. At this time, the pressing plate 11 enters the pressing stroke Ca, but the excitation of the solenoid Sa A is maintained [S28]. This pressure increase is detected by the pressure sensor 33 as an inching pressure Pi of, for example, 155 kg / cm ² before reaching a relief pressure of, for example, 160 kg / cm ² . When the detected pressure Pc becomes larger than Pi in this way, [S2
9], the inching operation starts from the position G (see FIG. 6 (a)).

Since the inching is about to start, the number of inchings X is not 3 or more (S36).
Never go to 3. Therefore, at this time, the measurement of the count number N4 of the forward rotation process C is temporarily stopped at the count of 22. Then, at the start of the inching operation, the pressing plate 11 presses the hard waste 34 to be in a stopped state, or furthermore, it is in a state of slightly rotating, and enters the pressing stroke Ca. on the other hand,
The counting of the time count N5 during the pressing stroke Ca is started, and α is added to N5 based on the rotation of the fluid pump 17 [S37]. Subsequently, it is asked whether the count number N5 has reached 7 [S38]. Since the measurement has just started, N5 is smaller than 7, and the process returns to step 3, and thereafter, steps 4, 11, 7, 13 , 18, and 24, N5 is increased in step 37 shown in FIG. Still 7
Since the count has not reached the above, it is repeated until the count number N5 becomes 7 in the same circulation of the electric signal as described above.
If it is determined that N5 ≧ 7, the pushing plate 11 stops at the position H (see FIG. 6 (a)) or is kept in a stopped state when encountering it, and N5 ≧ 7 is already satisfied. Count number is 0
Is reset to [S39].

Since the pressing stroke Ca of the first half of the inching operation is performed in this way, 1 is added to the number of inchings X of 0 [S40], and it is further determined whether X ≧ 3 or not [S41]. Then, since X = 1, step 2
The F3, which was set to 0 in step 1, is set to 1 [S42]. Returning to step 3, after step 4, 11, 7, 13, 18, 24, step 27
Is determined that F3 is not 0, and F3 = 1 is confirmed [S4
3], the pushing plate 11 enters the ascending stroke Ba temporarily.

As shown in FIG. 7 (f), the solenoid Sb A is demagnetized [S44], and the control valve 20b having the right port opened is switched to the neutral position. Further, the solenoid Sa A is excited [S39], the right port of the control valve 20a at the neutral position is opened, and the hydraulic oil from the fluid pump 17 is supplied to the slide pump as shown in FIG. 8 (e). The cylinder 14 is supplied to the piston side chamber 24 (see FIG. 3), whereby the slide cylinder 14 is extended, and the push-in plate 11 enters a temporary ascent operation (see FIG. 6 (a)) in which it is temporarily ascended. At this time,
If the count of N6 is started and the temporary increase is not finished, N6 ≧ 12 has not been reached [S46], α based on the rotation of the liquid pump 17 is added to the count number N6 [S47]. Then, the process returns to step 3, and after step 43 (see FIG. 7 (e)) again, in step 47, α is further added to N6 [S47].

In this way, when N6 ≧ 12 (S46), the pressing plate 11
Is terminated, and the flag F3 set to 1 is replaced with 0 (S48). Here, the above-mentioned N6 of the count number N7 in the forward rotation process C which is set to 0 is added [S49]. That is, N7 = 12. In addition, N6 is reset to 0 [S50], and the process returns to step 3 to demagnetize the solenoid Sa A in step 26 shown in FIG. Then, since the flag F3 is set to 0 in step 48, the solenoid Sb A is excited (S28), and further, in step 29, the operating oil pressure to the pressing plate cylinder 13 during the secondary press being performed is reduced. It is determined whether or not the pressure exceeds the inching pressure Pi, and if there is no pressure increase, the process proceeds from step 30 to step 33, and the counting of N4 which was stopped when the inching operation was previously started is restarted. Then, the process returns to step 3 and is continued until the count number N4 of the forward rotation process C for secondary pressing reaches 39.

In the meantime, if the operating oil pressure again exceeds the inching pressure Pi (S29), the inching operation, that is, step 37, is performed as described above.
And then to step 39.
Is added [S40]. Thereafter, the inching operation is performed as described above, and when the inching operation is completed, the process returns to step 3. As described above, the addition of N4 is also stopped during the second inching operation. And FIG. 6 (b)
As shown in FIG. 5, in this example, the inching operation is performed up to three times (see FIG. 5 (b)).
When 3 is confirmed, the process proceeds to step 31, and the addition in step 33 is repeated until N4 ≧ 39 in step 32 through step 32. Even if the inching pressure Pi is detected by the pressure sensor 33 during this time, it is ignored in step 36 and the addition of N4 is continued in step 33. If N4 ≧ 39 (S32), F2 is set to 5 in step 34 and the process returns to step 3, and the push plate 11 does not rotate forward any further.

When the inching operation is performed three times as described above, the count number N6 in the temporary ascent stroke Ba is 36 [6th
(See FIG. 2B.) In the case of two times, the number is 24. Needless to say, if the inching operation has never been performed, the value is 0. By performing the inching operation in this manner, even if the waste 34 is hard, the pressing position of the pressing plate 11 is made different, so that a crushable portion is also searched. By the way, in the case of the conventional apparatus in which the inching operation cannot be performed as in the present invention, the push plate 11 only rotates forward, and when the solid waste is encountered during the single forward rotation and the relief pressure Pj is reached. Then, the operation of the pressing plate 11 stops, and in the above example, the relief pressure Pj is maintained for a long time from N4 = 22 to N4 ≧ 39, that is, until a count number of 39−22 = 17 or more is obtained. It will be a situation that will do. However, in the present invention, if it is applied to a short time until N5 exceeds 7, that is, N4, N4 = 22 + 7 = 29.
At this point, the relief pressure Pj is released, and the time during which a large load acting on the fluid pump 17 and the cylinder 13 acts can be shortened.

In the above example, the count number during the second and subsequent inching operations is not illustrated. However, as described in FIG. 6B, the count number N4 in the forward rotation stroke C is determined by the first inching operation. Is 22 and, for example, 4 counts until the start of the second time, that is, the detection of the next inching pressure Pi, is 22 + 4 = 26. If N4 has not reached 39 after three inching operations (S32), for example, N
If 4 = 35, the push plate 11 will only have the remaining count number, ie 3
The normal rotation stroke C is further taken by 9−35 = 4, and thereafter, the process moves to the rising stroke D. As shown in FIG. 5 (b), when the inching operation is performed three times, the count number N6 = 12 in the temporary ascent operation becomes three, and the ascent stroke D is already N7.
= 36, so N7 of the predetermined ascent stroke D is, for example,
If it is up to 63, 27 counts will be left. By the way, if it becomes lower than the inching pressure Pi by 7 after the detection of the inching pressure Pi and the counting of N5 is started, that is, as shown in FIG. 6 (c), it is lower than the inching pressure Pi when N5 = 5. When this happens, the state in which the inching operation is about to be performed is released, and the pressing plate 11 continues the secondary pressing as it is. Of course, if the inching pressure Pi is detected again, it goes without saying that the inching operation is started from that point.

Next, the operation in the normal ascent stroke D will be described. Depending on the number of inching operations, the rising stroke D is performed for the remaining amount. Therefore, the count number N7 in the ascent stroke D is
It is a multiple of N6, that is, any of 0, 12, 24, and 36. First,
In step 35 in FIG. 7A, F2 = 5 is confirmed.
As shown in FIG. 7 (g), the solenoid Sb A is demagnetized [S51], and it is further determined whether the flag F4 is 1 or not [S5].
2) Since F4 = 0 is set in step 2, the count number α based on the rotation of the fluid pump 17 is added to the count number N7 in the ascent stroke D [S53], and the solenoid S
a A is excited [S54]. That is, the push plate 11 indicated by the two-dot chain line in FIG. Then, it is determined whether or not the push plate 11 has reached the count number 53 rising to the opening 4 of the packer 3 along the guide surface 7 [S55].
If it has just begun to ascend, it passes step 56, jumps step 58, and returns to step 3. In the same manner as described above, the process returns to step 52, where the count number α based on the rotation of the fluid pump 17 is added, and N7 is increased [S53].

In this manner, when N7 ≧ 53 in step 55, the [eighth
The solenoid Sb A is also excited [S57], and the push plate 11 has risen to the opening 4 of the packer 3 at the time of N7 ≧ 53. Indentation process E
The operation of [see FIG. 1] is started (see FIG. 8 (f)). At this time, the return oil from the slide cylinder 14 is supplied to the piston side chamber 28 of the push plate cylinder 13, the extension of the slide cylinder 14 and the extension of the push plate cylinder 13 are performed simultaneously, and discarded by the push stroke E. The object 34 is completely pushed into the refuse storage box 1. Then, the pushing process E is continued until the count number N7 reaches 63. Step 56
If N7 ≧ 63, the flag F4, which was 0, is set to 1 (S58). Then, go back to Step 3 and go to Step 5
When it reaches 2 and F4 = 1 is confirmed, the flag F1 replaced with 2 in step 6 is set to 0 [S59]. Returning to step 3, F1 = 0 is confirmed, and the solenoids Sa A and Sb A are demagnetized as shown in FIG. 7 (a) [S60].

This completes one cycle of operation. If it is necessary to repeat the next cycle [S61], the process returns to step 1. On the other hand, if there is no need to enter the next cycle, this operation ends. Incidentally, in an apparatus which is set to automatically enter the next cycle after the completion of one cycle, in step 60, the dust pushing mechanism performs the next operation continuously. In that case, the process returns to step 2 as indicated by the dashed line in FIG. 7 (a).

In the cycle movement of the dust pushing device described above, the time required for the operation of each stroke is performed by integrating the count number based on the rotation of the pump from the proximity switch 31. A timer is used for control, for example, at step 37 in FIG.
Then, time integration may be performed. The same applies to other processes, and the dust pushing control device can be smoothly operated.

In the above description, the ascent stroke D including the pushing stroke E in one cycle is described. However, the ascent stroke without the pushing stroke E may be employed. Further, the present invention is not limited to a cycle consisting of four main strokes, and for example, the present invention can be applied to a cycle consisting of three strokes so that there is no descending stroke or ascending stroke.

By the way, in the above-mentioned operation, the pushing plate 11 is moved down the stroke B.
When hard waste is encountered and the waste is not easily crushed, the pushing plate in the forward rotation process C as described in the present invention is used.
The operation corresponding to the eleven temporary ascent strokes Ba may be performed in the descending strokes B.

[Brief description of the drawings]

FIG. 1 is a side view of the entire configuration of a dust pushing device in a garbage 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. FIG. 4 is a schematic configuration diagram of an operation command means,
FIG. 5 (a) is an operation time chart of the solenoid operated in the case of crushable waste, and FIG. 5 (b) is an operation time of the solenoid when the push plate encounters a solid waste and repeats the inching operation. Chart, FIG. 6 (a)-
(C) is an explanatory view of the operation state of the push plate in the forward rotation stroke, FIGS. 7 (a) to (g) are flowcharts of the cycle movement by the dust pushing device, and FIGS. 8 (a) to (f) are the cycle movements. It is an operation | movement state diagram of the push plate of each stroke including a temporary ascent stroke and a pushing stroke. 1 ... garbage storage box, 3 ... packer, 10 ... slider, 11
… Pressing plate, 13… Cylinder for pressing plate, 14… Cylinder for sliding, 29 …… Operation command means, 34 …… Waste, Ba…
… Temporary ascent stroke, C …… Forward rotation stroke (secondary press), G…
... Position where a sudden rise in operating oil pressure occurs, Ca... Pressing stroke, H... End position of pressing stroke.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tatsuo Ikeda 6-1-145 Koshienguchi, Nishinomiya City, Hyogo Prefecture Inside Kyokuto Kaihatsu Kogyo Co., Ltd. (56) References JP-A-60-188202 (JP, A) 62-269802 (JP, A)

Claims (1)

(57) [Claims] 1. A slider mounted inside a packer connected to a rear portion of a refuse storage box and raised and lowered by a slide cylinder, and a pusher pivotally supported by the slider and rotated forward / reversely by a pusher plate cylinder. A dust control device for controlling the plate, the slide cylinder and the push plate cylinder to cause the push plate to perform a cycle movement, wherein the push plate performs a secondary press of the waste put in the packer. From the position where the operating oil pressure suddenly rises in the push plate cylinder by pressing the hard waste with, the push plate is temporarily pressed in the secondary press direction as the operating oil pressure rises The pressing process is further shifted to a pressing process for further pressing the waste, and when a predetermined time of the pressing process in which the operating oil pressure is increased ends, the pressing plate is moved from the end position of the pressing process to one press. A temporary ascent stroke is performed for a predetermined period of time, and a transition is made from the end position of the temporary ascent stroke to a forward rotation stroke in which the secondary press is performed again. Each time it occurs,
An operation instructing means is provided for sequentially performing an inching operation including the pressing stroke and the temporary ascent stroke, and after the inching operation is completed, the pressing plate completes the remaining forward rotation stroke. Garbage pushing control device for garbage trucks.