JP2652419B2 - Garbage pushing control device for garbage 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 motion mechanism of the push plate in the garbage truck,
A sensing device such as a cam or a limit switch is connected to a movable portion of the mechanism, and a control device for a cycle movement is operated by the sensing device. In this control device, the sensing device is in contact with the moving parts, so it is easy to wear, and its cycle movement may be out of order. There is a disadvantage that lacks.

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 attached to a drive shaft of a liquid pump, and a sensing device is provided 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 problems, and has as its object to crush hard waste put in a packer of a garbage truck by sequentially pressing various places with a pushing plate to efficiently remove garbage. A garbage of a garbage truck that can be pushed into a 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 a fluid pump or a cylinder can operate stably for a long time. A push control device is provided.

[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.

It is characterized in that the waste 34 (see FIG. 6 (a)) put into the packer 3 is pressed in the descending stroke B in which the pressing plate 11 primarily presses the waste 34, whereby the slide cylinder is pressed. From the position G in FIG. 14 where the working oil pressure rises sharply, the pressing plate 11 is temporarily pressed in the primary pressing direction as it is in the state where the working oil pressure is increased, and shifts to a pressing process Ba in which the waste 34 is further pressed. When the predetermined time of the pressing stroke Ba in the state in which the operating oil pressure has risen ends, a temporary forward rotation process Ca for temporarily rotating the pressing plate 11 forward from the end position H of the pressing stroke Ba is performed for a predetermined time. From the end position of the temporary forward rotation process Ca, the process is shifted to the descending stroke B for primary pressing again, and thereafter, each time the working oil pressure in the slide cylinder 14 suddenly increases, the pressing stroke Ba and the temporary forward rotation stroke
The inching operation consisting of Ca is performed sequentially, and after the inching operation is completed, the remaining descending stroke B
Is completed, and thereafter, the operation command means 29 (see FIG. 3) for completing the remaining forward rotation stroke C is provided.

[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, and takes a reversing stroke A which is the first stroke of the cycle motion. The waste 34 such as dust is put into the packer 3, the pushing plate 11 enters the descending stroke B by the operation of the sliding cylinder 14, and the dust is primarily pressed by the pushing plate 11 descending. When the push plate 11 encounters hard waste 34, the working oil pressure in the slide cylinder 14 rises sharply. At this time, the pushing plate 11 is prevented from descending, but the position G at which the working oil pressure suddenly increases is generated.
Thus, the pressing stroke Ba in which the lowering operation of the pressing plate 11 is further temporarily continued. When the temporary pressing is completed, the temporary forward rotation process Ca for temporarily reversing the pressing plate 11 by the operation of the pressing plate cylinder 13 is continued from the end position H of the pressing process Ba until a predetermined time elapses. After being stopped. Again, by the operation of the slide cylinder 14, the pushing plate 11 enters the descending stroke B and descends, and a different place of the hard waste 34 or a place where the waste does not exist is primarily pressed. 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 strokes is completed, the push plate 11 proceeds to the remaining descending stroke B, then completes the remaining forward rotation stroke C, and sequentially crushes the waste 34 into the trash storage box 1. To be stored smoothly.

〔The invention's effect〕

According to the present invention, the command signal from the operation command means reduces the pressing time during the downward stroke of the cycle motion while the push plate encounters solid waste, and the fluid generated when the high pressure response 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 descending stroke, the push plate successively presses different places, so that the crushing of dust and waste is promoted, and the pushing of the dust and the waste into the box becomes smooth.

〔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 sliding the 1 in the normal direction and the reverse direction are pivotally supported. Both ends of a slide cylinder 14 for moving the slider 10 up and down 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 a connecting 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 solenoids SaB and SaA for switching the port to the left port or the right port, and the control valve 20b has
Solenoids SbB and SbA for switching between them are provided, and these solenoids SaA, SaB, SbA and SbB are provided.
Switches the ports of the control valves 20a and 20b, which are sequentially operated during one cycle, according to a command signal from an operation command means 29 to be described later.
Control 13 actions. 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
By pressing hard waste in the descending stroke B (see FIG. 6 (a)) in which the primary press is performed, the hydraulic pressure rises from the position G where the hydraulic pressure in the slide cylinder 14 suddenly rises. In the state in which the pressing plate 11 is temporarily pressed in the primary pressing direction as it is to shift to a pressing process Ba for further pressing the waste, and when the predetermined time of the pressing process Ba in a state where the operating oil pressure is increased ends, Pushing plate from that position H
11 is performed for a predetermined period of time, and a transition is made from the end position of the temporary forward rotation Ca to the descending stroke B for primary pressing again. Each time a sudden rise in
The inching operation including Ba and the temporary forward rotation process Ca is sequentially performed, and after the inching operation is completed, the pressing plate 11 completes the remaining downward stroke B, and then completes the remaining normal rotation stroke C. ing.

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 counter circuit L reaches or exceeds a preset set rotation speed, that is, a set count number. Has become. The output holding circuit M
Is in an idling state to excite or demagnetize the solenoids SaA, SaB, SbA, SbB 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 engine speed 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 descending stroke B, when the solenoid SaB is excited, the sliding cylinder 14 is contracted.
It is set so that it can be continued for a time equivalent to the count number 38 ranging from to 64. 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 descending stroke B, the pressing plate
11 encounters hard waste, and when the hydraulic pressure applied to the slide cylinder 14 (see FIG. 3) is increased to a value equal to or higher than the set inching pressure Pi, the pushing plate 11 is moved to its position G.
Is further pressed in the downward direction. In the meantime, the pressing is continued until a predetermined count is reached, and then the pressing plate 11
Is temporarily rotated forward from its arrival position H so that the pressing plate 11 can be displaced to a place where the waste can be crushed so that the hard waste can be primarily pressed again at a different position. By the way, when the inching pressure Pi is generated, in most cases, the hydraulic oil immediately reaches the relief pressure Pj, but the pressing stroke in which only a predetermined count is maintained
The short time of Ba does not adversely affect the fluid pump 17 or the cylinder 14.

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 pushing plate indicated by a two-dot chain line
11 is lowered toward the waste 34 in the direction of arrow 35, that is, as a primary press. If the waste is hard and not crushable, the pressure in the rod side chamber 23 of the sliding cylinder 14 is increased in the encounter state shown by the solid line. When the pressure Pc detected by the pressure sensor 33 reaches the inching pressure Pi, the count number N4
Counting is started. Until the count becomes, for example, 7, the supply of the hydraulic oil to the slide cylinder 14 is continued. At this time, waste from position G
34 is hard and the pressing plate 11 does not move any more or takes a pressing stroke Ba to slightly crush it. If the push plate 11 is further lowered in the direction of the arrow 36 in order to facilitate visual understanding, it is maintained up to the above-mentioned count number 7. When the count reaches 7, the pressing stroke Ba is terminated, the port of the control valve 20a, 20b is switched at the position H, and a separate count (N5 described later) is started from that point. Hydraulic oil is supplied to the piston side chamber 28 of the push plate cylinder 13 until the count becomes, for example, 12. This process is a temporary forward rotation process Ca of the pressing plate 11 forming a part of the normal rotation process C as a secondary press, and the pressing plate 11 is separated from the waste 34 in the direction of the arrow 37 or pressed. The posture can be changed, for example, by tilting the waste 34 inside. The push plate 11 is controlled in this way, and when the count N5 reaches 12, the extension operation of the push plate cylinder 13 is stopped, and the slide cylinder 14
The inching operation is repeated a preset number of times as shown in FIGS. 5 (b) and 6 (b).

The push-in control device for a garbage truck configured as described above can operate as follows in one cycle including the descending stroke B to crush the input waste 34.

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 means 29. And the pushing plate 11 in the dust pushing device.
The flag F1 indicating each stroke operation during the cycle movement of
2, F3, F4 and F5 are each set to 0 [S2]. F1 = 0
It is discriminated whether or not [S3], 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
At the same time, X indicating the number of inching operations of the pushing plate 11 performed when the hard waste 34 is encountered is set to 0 [S5]. Next, the flag set to 1 in step 2
F1 is replaced by 2, and the flag F2, which is 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 in front 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 count is started 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 N1 count number α is added [S10]. The process returns 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 has been replaced with 2 and F2 has been replaced with 1.
The process proceeds to step 7 via 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 SbB (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 SbB is excited [S14], the control valve 20b shown in FIG.
Is supplied to the rod side chamber 27 (see FIG. 3) of the push plate cylinder 13. 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.

In this example, the pushing plate 11 is hard
When the inching operation is performed after colliding with 34 (see FIG. 6 (a)), a temporary forward rotation process Ca that forms a part of the forward rotation process C is performed as necessary. However, here, the case where the waste 34 is soft and crushable will be described. Since F2 = 3 has been replaced, the process returns to step 3 and proceeds from step 4 to steps 11, 7, and 1.
The process proceeds to step 18 via 3, and it is confirmed that the flag F2 is 3. As shown in FIG. 7 (d), first, the solenoid SbB is demagnetized [S19], while the solenoids SbA, Sa are demagnetized.
The demagnetized state of A is also maintained [S20]. Subsequently, it is determined whether or not the flag F3 is 0 (S21). Since F3 is set to 0 in Step 2, the solenoid SaB (see FIG. 3) is excited [S22], and the sliding cylinder 14 is reduced. And push plate 11
Begins to descend. As shown in FIG. 8 (b), when the slide cylinder 14 is reduced, the slider 10 is moved along the guide groove 8 integrally with the pushing plate 11.

Here, measurement of the count number N3 for controlling the descending stroke B is started. If the waste 34 is soft or easily broken by pressing, the pressure Pc of the hydraulic oil in the slide cylinder 14 does not become too high. Therefore, if the pressure Pc detected by the pressure sensor 33 is lower than the inching pressure Pi [S23], N4 indicating the count number of the pressing stroke Ba remains 0 (S24), and the process proceeds to step 25, where the flag F3 = 0. Is maintained [S25], and it is determined whether or not the count number N3 after the pressing plate 11 shifts to the downward stroke B has reached 38 [S26]. The count number N3 is added to the count number N3 by the signal from the proximity switch 31 (S2
7], and return to step 3. Then, the count number N3 is increased while following the same route. If N3 ≧ 38 in step 26 in this way, the flag F2 set to 3
Is replaced by 4 [S28]. Then, the process returns to step 3 and follows steps 7, 11, 13, and 18 to step 29.
As a result, the operation command means 29 issues a command to shift to the next step, ie, the forward rotation step C for secondary press. That is, the seventh
As shown in FIG. 8 (f), the solenoid SaB is demagnetized [S45] and the solenoid SbA is excited [S48], and the control valve 20a is set to neutral, and the control valve 20b is switched to the right port [FIG. 8 (d)]. reference〕. In this way, the pushing plate 11 shifts to the normal rotation stroke C.

Next, when the waste 34 is hard to be crushed, and the push plate 11 cannot continuously shift to the count N3 of 38 in the descending stroke B of the primary press, that is, the operation that forms the center of the present invention. The case will be described.

If the push plate 11 encounters the solid waste 34 into which the pushing plate 11 has been put, for example, at a count number N3 of 22, and the waste 34 is not crushed, the pressure in the rod side chamber 23 (see FIG. 3) of the sliding cylinder 14 increases. . At this time, the pressing plate 11 enters the pressing stroke Ba, but the excitation of the solenoid SaB is maintained [S22].
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 . Thus, the detection pressure Pc
Is larger than Pi [S23], the inching operation is started from the position G (see FIG. 6 (a)).

Since the inching is about to start, the number of inchings X is not equal to or more than 3, and the process does not proceed from step 25 to step 27. Therefore, at this time, the measurement of the count number N3 of the descending stroke B is temporarily stopped at the count of 22. Then, at the start of the inching operation, the push plate 11 becomes hard waste.
The pressing step Ba is entered by pressing the button 34 to stop or to slightly lower it. On the other hand, the counting of the time count N4 during the pressing stroke Ba is started, and the fluid pump 17
Is added to N4 based on the rotation of [S31]. continue,
It is asked whether the count number N4 has reached 7 [S32]. Since the measurement has just started, N4 is smaller than 7, and the process returns to step 3 and steps 4, 11, 7, 13, and 18 are performed thereafter. Then, N4 is increased in step 31 shown in FIG. Since the count has not yet reached 7, the repetition of the same electric signal as described above is repeated until the count number N4 reaches 7, and if it is determined in step 32 that N4 ≧ 7, the pushing plate 11 moves to the position H [the 6 (a)]
The count value that has been stopped after being encountered is reset, and the count number that already satisfies N4 ≧ 7 is reset to 0 [S33].

Since the pressing stroke Ba of the first half of the inching operation has been performed in this manner, the number of inchings X of 0
Is added to [S34], and it is further questioned whether or not X ≧ 3 [S35]. Then, since X = 1, F3 set to 0 in step 2 is set to 1 [S36]. Return to step 3, go through steps 4,11,7,13,18 and in step 21
It is determined that F3 is not 0, F3 = 1 is confirmed [S37],
The push plate 11 temporarily enters the normal rotation stroke Ca.

As shown in FIG. 7 (e), the solenoid SaB is demagnetized [S38], and the control valve 20a having the left port opened is switched to the neutral position. Further, the solenoid SbA is excited [S39], the right port of the control valve 20b in the neutral position is opened, and the hydraulic oil from the fluid pump 17 is applied to the push plate as shown in FIG. 8 (c). This is supplied to the piston side chamber 28 of the cylinder 13 (see FIG. 3), whereby the push plate cylinder 13 is extended, and the push plate 11 temporarily rotates forward temporarily (see FIG. 6 (a)). 〕to go into. At this time, N5
Count is started, and the normal rotation ends temporarily.If N5 ≧ 12 has not been reached (S40), α based on the rotation of the fluid pump 17
Is added to the count number N5 [S41]. Then, the process returns to step 3, and after step 37 (see FIG. 7 (d)) again, in step 41, α is further added to N5 [S4
1].

In this way, when N5 ≧ 12 (S40), the pressing plate 11
And the flag F3 set to 1 is replaced with 0 (S42). Here, the above-mentioned N5 is added to the count number N6 in the forward rotation process C which is set to 0 [S43]. That is, N6 = 12. In addition, N5 is reset to 0 [S44], and the process returns to step 3 to demagnetize the solenoid SbA in step 20 shown in FIG. Then, since the flag F3 is set to 0 in step 42, the solenoid SaB is excited [S22], and further, in step 23, the operating oil pressure to the sliding cylinder 14 is changed to the inching pressure Pi during the primary press being performed. Is determined, and if there is no pressure increase, the process proceeds from step 24 to step 27, and the counting of N3 stopped when the inching operation was previously performed is restarted. Then, the process returns to step 3 and is continued until the count number of the primary press stroke reaches 38.

If the operating oil pressure again exceeds the inching pressure Pi during this time [S23], the aforementioned inching operation, that is, step 31
And then to step 33, where X is 1
Is added [S34]. 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 N3 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 25, and the addition in step 27 is repeated through step 26 until N3 ≧ 38 in step 26. Even if the inching pressure Pi is detected by the pressure sensor 33 during this time, it is ignored in step 30 and the addition of N3 is continued in step 27. If N3 ≧ 38 (S26), F2 is set to 4 in step 28 and the process returns to step 3, and the push plate 11 does not descend any further.

As described above, when the inching operation is performed three times, the count number N6 in the normal rotation stroke C is 36 (see FIG. 6B), and is 24 in the case of two times. 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 pushing plate 11 only descends, and when the solid waste is encountered during the one-time descending and the relief pressure Pj is reached, the pushing is performed. The operation of the plate 11 stops, and in the above example, the relief pressure Pj is maintained for a long time from N3 = 22 to N3 ≧ 38, that is, until a count number of 38−22 = 16 or more is obtained. It will be a situation that will end up. However, in the present invention, the relief pressure Pj is released in a short time until N4 exceeds 7, that is, when N3 = 22 + 7 = 29 if applied to N3, and a large load acting on the fluid pump 17 and the cylinder 14 acts. Time 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 N3 in the descending stroke B is determined by the first inching operation. If the start is 22, and the count is, for example, 4 before the start of the second time, that is, the detection of the next inching pressure Pi, 22 + 4 = 26. If N3 has not reached 38 after three inching operations (S26), for example, N3
If 3 = 35, the push plate 11 will only have the remaining count number, ie 3
The descending stroke B is further taken by 8−35 = 3, and then the process proceeds to the forward rotation stroke C. As shown in FIG. 5 (b), when the inching operation is performed three times, the forward rotation stroke C is already N7.
= 36, so that N7 of the predetermined forward rotation process C is, for example,
If it is set to 39, only the count number 3 is left. By the way, if after detecting the inching pressure Pi and counting N4, it becomes lower than the inching pressure Pi before reaching 7, that is, lower than the inching pressure Pi when N4 = 5 as shown in FIG. 6 (c). Then, the state of the inching operation is released, and the pressing plate 11 continues the primary press. 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 forward rotation process C will be described. Depending on the number of inching operations, the normal rotation stroke C is performed only for the remaining amount. Therefore, the count number N6 in the forward rotation process C is
It is a multiple of N5, that is, any of 0, 12, 24, and 36. First,
In step 29 in FIG. 7 (a), F2 = 4 is confirmed,
As shown in FIG. 7 (f), the solenoid SaB is demagnetized [S45], and it is further determined whether the flag F4 is 1 or not [S4].
6] Since F4 = 0 was set in step 2, F4
Is set to 1 (S47), and then the solenoid SbA is excited [S48]. That is, as described above, the push plate 11 starts or restarts the forward rotation and enters the forward rotation operation, and at the same time, the count of N6 is started or restarted from the previous value [S4
9]. It is determined whether or not N6 has reached the count number 39 until the normal rotation is completed [S50], and if not, the count number α based on the rotation of the fluid pump 17 is added to N6 [S51]. Then, the process returns to step 2 and proceeds to step 46. Since F4 has already been set to 1, step 50 is immediately executed.
, And α is further added [S51]. In this way, when N7 ≧ 39 at step 50, the flag F2 set to 4 is replaced with 5 (S52). As a result, the push plate 1
1 is moved to ascent stroke D.

Returning to step 3, it is confirmed that F2 is not 4 in step 29 but 5 in step 53, and the solenoid SbA is demagnetized in FIG. 7 (g) [S54]. And
It is determined whether or not the flag F5 = 1 (S55). Step 2
Since F5 is reset to 0, the count number α based on the rotation of the fluid pump 17 is added to the count number N7 in the rising stroke D [S56], and the solenoid SaA is excited [S57]. That is, the push plate 11 indicated by the two-dot chain line in FIG. Then, the count number at which the pushing plate 11 rises along the guide surface 7 to the opening 4 of the packer 3
It is determined whether or not it has reached 53 (S58), and if it has just begun to ascend, it passes through step 59 and jumps to step 61,
Return to step 3. Step again as above
At 55, the count number α based on the rotation of the fluid pump 17 is added, and N7 is increased [S56].

In this manner, when N7 ≧ 53 in step 58, the [eighth
The solenoid SbA is also excited [S60], and when N7 ≧ 53, the push plate 11 is raised to the opening 4 of the packer 3; Process E
The operation of [see FIG. 1] is started [see FIG. 8 (e)]. 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 59
If N7 ≧ 63, the flag F5, which was 0, is set to 1 [S61]. Then, go back to Step 3 and go to Step 5
When it reaches 5 and F5 = 1 is confirmed, the flag F1 replaced with 2 in step 6 is set to 0 [S62]. Returning to step 3, F1 = 0 is confirmed, and the solenoids SaA and SbA are demagnetized as shown in FIG. 7A (S63).

This completes one cycle of operation, but if it is necessary to repeat the next cycle [S64], step 1
Is returned to. 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 completion of one cycle, the dust pushing mechanism performs the next operation continuously in step 63. 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, step 31 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 including four main strokes, and may be applied to a cycle including three strokes without an ascending stroke in the present invention.

[Brief description of the drawings]

FIG. 1 is a side view of the entire structure 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. 3 is a structure of a cycle movement mechanism. Fig. 4 is a schematic diagram of the operation instructing means, Fig. 5 (a) is an operation time chart of a solenoid leading in the case of crushable waste, and Fig. 5 (b) is waste having a hard pushing plate. 6 (a) to 6 (c), the operation time chart of the solenoid when the inching operation is repeated in response to
7 (a) to 7 (g) are flow charts of the cycle movement by the dust pushing device, and FIGS. 8 (a) to 8 (e) are temporary forward rotation cycles in the cycle movement. FIG. 7 is an operation state diagram of a push plate in each stroke including a push stroke. 1 ... garbage storage box, 3 ... packer, 10 ... slider, 11
… Push plate, 13… Cylinder for push plate, 14… Cylinder for slide, 29 …… Operation command means, 34… Waste, B…
… Down stroke (primary press), Ba… Press stroke, C… Forward rotation stroke, Ca… Temporary forward rotation stroke, G… Position where a sudden rise in working oil pressure occurs, H… End of pressing stroke position.

Continuation of the front page (72) Inventor Tatsuo Ikeda 6-145 Koshienguchi, Nishinomiya City, Hyogo Prefecture Inside the Far East Development Industry Co., Ltd. (56) References JP-A-61-226401 (JP, A)

Claims (1)

(57) [Claims] 1. A slider mounted inside a packer connected to a rear part 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. In a dust press control device for controlling the plate, the slide cylinder, and the push plate cylinder to cause the push plate to perform a cycle motion, the waste plate put into the packer is hardened in a descending stroke in which the push plate primarily presses the waste. By pressing the waste, the push plate is temporarily pressed in the primary press direction as the operating oil pressure rises from the position where the operating oil pressure in the slide cylinder suddenly rises, further increasing the waste. Shift to the pressing stroke to press, and when the predetermined time of the pressing stroke in the state where the operating oil pressure is raised ends, the push plate is moved from the end position of the pressing stroke. A temporary forward rotation process for temporarily performing forward rotation is performed for a predetermined time, and a transition is made from the end position of the temporary forward rotation process to a descending stroke for primary pressing again. Every time it occurs, the inching operation consisting of the pressing stroke and the temporary forward rotation stroke is sequentially performed, and after the inching operation is completed, the remaining downward stroke is completed on the push plate, and thereafter, the remaining forward rotation stroke is completed. A dust pushing control device for a garbage truck, further comprising an operation command means for causing the dust to be pushed.