JPH0243106A - Garbage cramming control device for garbage car - Google Patents

Abstract

PURPOSE:To improve cramming efficiency by temporarily carrying out further pressing upon a sudden increase in hydraulic oil pressure caused by a hard waste encountered during the pressing process with a device described here which is to be loaded onto a packer installed in a garbage car, then performing a diagonal crushing process through forward rotation and temporary raising, and finally returning to forward rotation. CONSTITUTION:When hydraulic oil pressure in a cramming plate cylinder increases suddenly due to a hard waste 34 encountered during a forward process C with a cramming plate 11, a pressing process Ca is carried out to temporarily continue the forward process from that position G. Then, at a position H where the pressing process Ca terminates, both the cramming plate cylinder and a slide cylinder are activated to proceed to a diagonal crushing process Bc where pressing and temporary raising are performed at the same time. Subsequently, after the lapse of a prescribed period of time, the diagonal crushing process Bc is stopped to enter the pressing process C once again. This arrangement permits even hard waste to be crammed efficiently, ensuring stabilized operation of a fluid pump, etc., over a long period of time.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a garbage pushing control device for a garbage truck, and in detail,
A garbage pushing device is attached to a packer connected to a garbage storage box of a garbage truck that collects garbage, and the pushing plate moves in a cycle that moves up and down and reverses in the forward direction to store garbage in the garbage storage box. The present invention relates to a garbage pushing control device that can perform the following tasks.

[Conventional technology]

To control the cyclic motion mechanism of the push plate in a garbage collection vehicle, a sensing device such as a cam or a limit switch is connected to the movable part of the mechanism, and the cyclic motion control device is activated by this sensing device. There is. In this control device, since the sensing device is in contact with the moving parts, it is prone to wear and the cycle movement may be disrupted, and the structure requires a large number of sensing devices, resulting in frequent failures and poor durability. There are some drawbacks.

As a solution to this problem, the
There is a cycle motion control device described in Japanese Patent No. 5.

This is done by attaching a proximity plate to the drive shaft of the fluid pump.
A sensing device is disposed opposite the proximity plate. Then, each time the proximity plate approaches the sensing device as the fluid pump rotates, a change is given to the high frequency signal emitted from the sensing device, thereby making it possible to extract the rotational speed of the fluid pump. There is. A control device that receives a high frequency signal from a sensing device is used for cycle-linked control of the push plate, and the sensing device measures the rotational speed of the fluid pump and matches it with the set rotational speed set in advance in the control device. Control is performed by comparing the rotational speed with the measured number of rotations, and the pushing plate undergoes cyclic motion consisting of respective predetermined strokes, such as reversing, descending, normal rotation, and upward strokes. At this time, the dust thrown into the puff force is mainly compressed during the downward stroke and normal rotation stroke of the pushing plate, and is smoothly stored in the dust storage box during the upward stroke.

[Problem to be solved by the invention]

In recent years, large and hard waste products such as electric washing machines and electric refrigerators are often thrown into garbage trucks. At that time, the pushing plate controlled by the above-mentioned control device is not designed to make a special movement to press and crush the hard waste thrown in efficiently, so the hard waste is removed from the garbage. There is a problem that it is difficult to efficiently store them in the storage box.

Furthermore, in the cyclic movement of the pusher plate controlled by the above-mentioned control device, when the pusher plate that descends or rotates forward encounters hard waste and stops, the fluid pressure increases and the relief valve operates. I will do it. The push plate is designed to proceed to the next stroke after the completion of a count based on the rotation of the fluid pump corresponding to the entire stroke of each stroke, which is preset in the control device, or after the elapse of a predetermined time. Since the hydraulic circuit that operates cylinders and the like is held in a high pressure state for a long time, problems such as adversely affecting the life of the fluid pump occur.

The present invention was made in view of the above problems, and its purpose is to efficiently crush the hard waste thrown into the puffing force of a garbage truck by sequentially pressing various parts with a pushing plate. A garbage truck that can be pushed into a garbage storage box, and in turn, the hydraulic equipment such as the cylinder that operates the push plate will not maintain a high pressure state for a long time, allowing fluid pumps and cylinders to operate stably over a long period of time. It is an object of the present invention to provide a device for controlling garbage pushing.

[Means to solve the problem]

As shown in FIG. 1, the present invention includes a slider 10 that is mounted inside a puffer 3 connected to the rear of a garbage storage box 1 and is moved up and down by a slide cylinder 14;
It is commonly used in a garbage pushing control device that controls the pushing plate 11 which is pivoted at the 0 and rotates forward and reverse by the pushing plate cylinder 13, the slide cylinder 14 and the pushing plate cylinder 13, and causes the pushing plate 11 to perform cycle motion. be done.

The feature is that by pressing the hard waste 34 in the normal rotation stroke C in which the pushing plate 11 secondarily presses the waste 34 [see Fig. 6 (a)] that has been put into the puffing force 3, From position G, where a sudden increase in the working oil pressure in the pushing plate cylinder 13 occurs, the pushing plate 11 is moved to a pressing stroke Ca in which it is temporarily pressed in the secondary press direction, and the working oil pressure is in a state of increasing. When the pressing stroke Ca is completed, from the end position H of the pressing stroke Ca, a diagonal crushing stroke Bc4 is performed in which the forward rotation stroke C of the pushing plate 1.l is further continued and at the same time it is temporarily raised, and then, Operation command means 2 configured to shift to normal rotation stroke C for secondary pressing again
9 (see Figure 3).

[For production]

The dust pushing device installed inside the puffing force 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. Waste material 34 such as garbage is thrown into the puffing force 3, and the pushing plate 11 enters a downward stroke B by the operation of the sliding cylinder 14, and as the pushing plate 11 descends, the garbage is further pressed. When the downward stroke B is completed, the pushing plate 11 is moved to the pushing plate cylinder 1.
3 enters the normal rotation stroke C for secondary pressing, and when hard waste material 34 is encountered, the hydraulic pressure in the pushing plate cylinder 13 suddenly increases. At this time, the forward rotation of the push plate 11 is blocked, but from the position G where the working oil pressure suddenly increases, the forward rotation of the push plate 11 is further temporarily continued in the pushing stroke Ca. Become. When the temporal pressing operation ends, from the end position H of the pressing stroke Ca,
By the operation of the push plate cylinder 13, the push plate 11 further continues the normal rotation stroke C, and at the same time, by the operation of the slide cylinder 14, the push plate 11 is temporarily raised. That is, the pushing plate 11 moves in the direction of combination of the normal rotation partially sustained in the normal rotation stroke C and the temporary rise during the oblique crushing stroke Bc.
4, and continues until a predetermined time has elapsed, then stops. By the operation of the pushing plate cylinder 13 again, the pushing plate 11 enters the normal rotation stroke C and rotates in the normal direction, thereby secondary pressing a different part of the hard waste 34 or a part where the waste does not exist. This operation is repeated in sequence, and the pushing plate 11 can efficiently press and crush the hard waste material 34 at different locations. When the inching operation including a predetermined number of pressing strokes is completed, the pushing plate 11 proceeds to the remaining normal rotation stroke C, and smoothly stores the crushed waste 34 in the garbage storage box 1 one after another.

〔Effect of the invention〕

According to the present invention, the command signal from the operation command means shortens the pressing time while the pushing plate encounters hard waste in the normal rotation stroke of the cycle motion, which occurs if the high pressure state continues. Deterioration in the durability of hydraulic equipment such as fluid pumps and cylinders can be avoided. In addition, during the descending process, the pushing plate presses different locations one after another, which promotes the crushing of garbage and waste.At this time, the pushing plate can also change its posture, such as pushing the waste to the back.
As a result, pushing into the garbage storage box becomes even smoother.

〔Example〕

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

As shown in FIG. 1, a pack 3 is rotatably connected to the rear upper end of a garbage storage box 1 placed on the frame of a garbage truck by a hinge pin 2, and when the pack 3 is lowered, An opening 4 formed in this pack 3 communicates with the inside of the garbage storage box 1. The pack 3 has an input port 5 formed in its rear part, and the bottom part continuous with the input port 5 has a downwardly recessed arc-shaped compression surface 6, which rises diagonally upward toward the garbage storage box l, and has the above-mentioned opening. A guide surface 7 continuous to the portion 4 is formed.

A garbage pushing device for compressing garbage and pushing it into the garbage storage box 1 is housed in the packer 3.

The dust pushing mechanism and the device that controls the mechanism will be described in detail below. A guide groove 8 is formed in both side walls of the packer 30 from the upper front to the lower rear, and in this guide groove 8, a pair of left and right sliders 1 having a pair of guide rollers 9a and 9b are formed.
0 is slidably supported. A push plate 11 is swingably supported between the lower ends of both sliders 10 by a pivot 12, and a bracket lla protruding from the back of the push plate 11 and the upper end of the slider IO are connected to the push plate 11 in the forward and reverse directions. Both ends of the pushing plate cylinder 13 for swinging in the direction are pivotally supported. Both ends of a slide cylinder 14 for moving the slider 10 up and down along the guide R8 are pivotally supported at the middle of the slider IO and the lower end of the backer 3.

Therefore, by sequentially controlling the sliding cylinder 14 and the pushing plate cylinder 13, for example, as shown by the two-dot chain line, the pushing plate 11 undergoes a reversing stroke A, -
It is possible to perform a cycle motion consisting of four strokes: a downward stroke B for the next press, a normal rotation stroke C for the second press, and an upward stroke.

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

The structure of the cycle motion mechanism 18 will be explained based on FIG. The discharge pipe 19 of the fluid pump 17 is connected to a control valve 20a, and is further connected to the other control valve 20 via a communication pipe 19a.
connected to b. Control valve 20a is connected to rod side chamber 23 and piston side chamber 24 of sliding cylinder 14 via conduit 21.22, control valve 20b is connected to conduit 25.
It is connected to the rod side chamber 27 and the piston side chamber 28 of the pushing plate cylinder 13 via 26. The control valve 20a has solenoids SaB and SaA for switching it to the left port or the right port.
There is a solenoid SbB to switch it left and right.
, SbA are provided respectively, and these solenoids S
aA, SaB, SbA, and SbB switch the ports of the control valves 20a and 20b that operate sequentially during the - cycle in response to a command signal from the operation command means 29, which will be described later, to control the operation of the slide cylinder 14 and the push plate cylinder 13. Control. Further, the discharge pipe 19 includes a relief valve 32 that opens when the pressure increases to the relief pressure and returns the hydraulic oil to the tank, and a relief valve 32 that detects whether or not the pressure has increased above the inching pressure Pi, which is set at a pressure lower than the relief pressure. A pressure sensor 33 is attached.

For example, an inverted-shaped proximity plate 30 is fixed to the rotating shaft 16 of the fluid pump 17 shown in FIG. There is. Note that the number of proximity plates 30 is not limited to one, and although not shown in the drawings, for example, a plurality of proximity plates 30 may be arranged on the circumference. 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 signal being emitted from the proximity switch 31, thereby changing the rotation speed of the fluid pump 17 into a high frequency signal. It can be extracted as

The operation command means 29, which receives the high frequency signal transmitted from the proximity switch 31, measures the actual rotation speed of the fluid pump 17 and compares the measured rotation speed with a preset rotation speed, that is, the fluid When the count number based on the rotation of the pump 17 matches or exceeds the set count number, the control valves 20a, 2 of the cycle movement mechanism 18 are activated each time.
0b is switched to issue a command.

FIG. 4 shows a schematic configuration of the operation command means 29.

This is, for example, a microcomputer, which includes a fixed storage section, a write-in storage section, a central processing unit, etc. (not shown). Its function is a normal rotation stroke C in which the pushing plate 11 secondary presses the waste thrown into the packer 3 [Fig. 6 (a)
Position G where a sudden increase in the hydraulic pressure inside the pushing plate cylinder 13 occurred due to pressing hard waste at
Then, the pushing plate 11 is moved to the pressing stroke Ca in which it temporarily presses further in the pressing direction, and when the pressing stroke Ca in which the working oil pressure is increased is completed, the forward rotation stroke of the pushing plate 11 starts from the position H. A diagonal crushing stroke Bc4 is carried out in which C is further maintained and at the same time it is temporarily raised, and then a forward rotation stroke C is carried out in which secondary pressing is performed again [see FIG. 6(b)].

Its specific configuration includes a counting circuit, an output circuit Q, and an output holding circuit M. The counting circuit is a sensing device 31
The number of revolutions, that is, the number of counts of the fluid pump 17 is measured by the binary method by receiving the high frequency signal transmitted from the controller. When the actual rotational speed of the fluid pump 17 measured by the counting circuit reaches or exceeds a preset set rotational speed, that is, a set count number, the output circuit Q activates the output holding circuit M.
It is designed to emit an output signal. The output holding circuit M controls the control valve 20a based on the signal from the output circuit Q.
, 20b, solenoid SaA, S
In order to excite or demagnetize aB, SbA, and SbB and to generate discharge pressure in the fluid pump 17,
The rotary solenoid Sry, which starts increasing the rotational speed of the idling engine, is also energized or demagnetized. Note that the output circuit Q also has a function of resetting the count number measured by the counting circuit to O when each count number, which will be described later, reaches a set maximum value.

In this example, if the pushing plate 11 takes a cyclical motion consisting of four strokes A-D of reversing, descending, normal rotation, and ascending, and no hard waste is pressed during this period, as shown in FIG.
As shown in a), the count number No. is accumulated to complete the cycle. For example, in the normal rotation stroke C, the solenoid SbA is energized to cause the push plate cylinder 13 to extend, but during this period the cumulative count number is set to continue for a time corresponding to the count number 39 from 65 to 103. ing. Note that, as will be described later, while the electric signal circulates once through the control system, the fluid pump 17
A count number α based on the rotation of is added. Since this count number α depends on the rotational state of the fluid pump 17,
It is not always the same value, and generally it is a different value each time.

In the present invention, in this normal rotation stroke C, the pushing plate 1
1 encounters hard waste, and when the pressure increases the hydraulic pressure to the push plate cylinder 13 (see Figure 3) to a level higher than the set inching pressure Pi, the push plate 11 is moved further from its position G to the correct position. During this time, the pressing is continued until a predetermined count is reached, and then the pushing plate 11 is operated to crush obliquely from the reached position WH, and the hard waste is secondary pressed again at a different position. Therefore, the pushing plate 11 can be moved to a location where the waste can be crushed.Incidentally, when the inching pressure Pi is generated, in most cases, the hydraulic oil immediately goes to the relief pressure P.
j is reached, but only for a short period of time during the pressing stroke Ca and the oblique crushing stroke Bc4, in which only a predetermined number of counts are maintained, and the fluid pump 17, cylinder 14, etc. are not adversely affected.

Here, the operation that constitutes the main part of the present invention will be explained more clearly. In FIG. 6(a), the pushing plate 1 indicated by the - dotted chain line
1 is lowered toward the waste material 34 in the direction of the arrow 35 by the contraction of the slide cylinder 14. Then, at the position shown by the two-dot chain line where the -next press is performed, the pushing plate 11 is in a state where it has finished descending the count number N5 = 38 minutes.

Subsequently, the pushing plate 11 is rotated forward in the direction of the arrow 36 by the extension of the pushing plate cylinder 13, and counting of the count number N4 is started, and the pushing plate 11 encounters the waste material 34 as shown by the solid line. At this time, if the waste material 34 is hard and cannot be crushed, the pressure in the piston side chamber 28 of the pushing plate cylinder 13 increases in the illustrated state. Pressure sensor 33
When the detected pressure Pc reaches the inching pressure Pi, counting of the count number N5 is started at that point. The supply of hydraulic oil to the push plate cylinder 13 is continued until the count reaches 7, for example. At this time, the waste material 34 is hard and the pushing plate 11 does not move any further from the position G, or takes a pushing stroke Ca in which it is crushed a little. In order to facilitate visual understanding, if the pushing plate 11 is further rotated forward in the direction of the arrow 37, this continues until the count number 7 described above. When the count reaches 7, the pressing stroke Ca is completed, the port position of the control valve 20b is maintained at that position H, and a separate count (N6 to be described later) is started from that point. The supply of hydraulic oil to the piston side chamber 28 of the push plate cylinder 13 is maintained until the count reaches 12, for example, and at the same time, the boat position of the control valve 20a, which was in the neutral position, is switched, and the piston of the slide cylinder 14 is Hydraulic oil is supplied to the side chamber 24. Therefore, both cylinders 13 and 14 are extended, and the push plate 11 has a partial forward rotation operation that continues the forward rotation stroke C, and a temporary upward operation that traces a part of the downward stroke B in reverse. Arrow 38 which is the direction
It enters the oblique crushing stroke Bc4 in the direction. Incidentally, during the above-mentioned counting of N6, count N7 as a temporary increase amount is converted from count N6. This N
The count of 7 is to calculate the remaining amount of rise after repeating the temporary rise several times.For example, it is determined by the cross-sectional area ratio of the piston side chamber and the rond side chamber of both cylinders 13 and 14, and the ratio ε On the other hand, it is converted as N7=N6×ε. That is, if ε is 0.6, N6 is the predetermined 12
When the count is reached, as shown in Figure 6(a),
N7 = 7 (12X0.6 = 7.2, but 1
(an integer with the part less than the count discarded).

By moving through this oblique crushing stroke Bc4, the pushing plate 11 can change its posture, such as approaching the waste material 34 in the direction of the arrow 37 or pushing the waste material 34 being pressed to the back. When the count of N6 reaches 12, the contraction operation of the slide cylinder 14 and the extension operation of the push plate cylinder 13 are stopped. After the push plate 11 stops,
By the extension operation of the push plate cylinder 13 again, as shown in Fig. 5 (
b) and FIG. 6(b), the above-mentioned inching operation is repeated a preset number of times.

The garbage truck pushing control device configured as described above can crush the thrown-in waste 34 by operating the -cycle including the normal rotation stroke C as follows.

As shown in the flowcharts of FIGS. 7(a) to (g),
When the pushing start command button (not shown) of the garbage pushing device in the garbage truck is pressed [S1], a start signal is input to the operation command means 29, and the pushing plate 1 of the garbage pushing device is pressed.
The flag Fl indicating each stroke operation during the cycle movement of 1 is 1.
, F2. F3 and F4 are each set to 0 [S2
]. It is determined whether Fl = 0 or not (N3), Fl = 1
is confirmed in step 4, and all counts are reset to O in the operation command means 29. That is, Nl
=O, N2 =0..., N8=O, and
X, which indicates the number of inching operations of the pushing plate 11 performed when hard waste material 34 is encountered, is set to O [S5].

Next, the flag F1, which was set to 1 in step 2, is set to 2.
The flag F2, which is set to 0, is replaced to 1 [S6].

Subsequently, it is determined whether F2=1 or not [S7].

By the way, flag F2 takes one of 1 to 5, and F2
When =1, the engine speed is increased to the idle up stroke ■; when F2=2, the push plate 11 is reversed to the reversal stroke A; when F2=3, the descent stroke B is pressed further; when F2=4, the secondary press is performed. It is now possible to proceed to the forward rotation stroke C, where F2=5, and to the upward stroke including the push stroke E at F2=5.

As shown in FIG. 7(b), by setting the flag F2=1, the garbage pushing device enters the idle up stroke I, the count number Nl in that stroke is measured, and the rotary solenoid (not shown) is energized. S8], the rotational speed of the idling engine is increased in order to generate discharge pressure in the fluid pump 17. That is, the power extraction device 15 (see Fig. 2) of the garbage truck extracts a large amount of power from the engine, the power is supplied to the fluid pump 17 via the rotating shaft 16, and after a predetermined period of time, the fluid pump 17 is
is considered to be steady operation at a specified rotation speed. As described above, each time the proximity plate 30 rotating in front of the proximity switch 31 approaches, the high frequency signal changes for each revolution of the fluid pump 17, and the number of changes is counted.

Now, since the count has just started and N1≧3 is not satisfied [S9], each 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 the count Nl (S10). ], Figure 7 (
Return to step 3 of a). Note that Nl = N1 + α is set in step 10 because the number of rotations of the rotating shaft 16 while the electric signal circulates is not necessarily the same each time, so the detected count number is added as α. As stated earlier, That is, α is 1
In some cases, it may be O or 3. Since Fl is replaced with 2 and F2 is replaced with 1 in step 6, the process moves from step 4 to step 7 via step 11.

Step 7 leads to step 9, and the addition of count N1 [SlO] is repeated, and if Nl≧3 [S9],
Flag F2 is set to 2 [S12], and the process returns to step 3. Then follow step 7 and step 13
Then, the process moves to step 14 in FIG. 7(C). During the above period, the fluid pump 17 enters steady operation and is in a state where it can discharge hydraulic oil at a predetermined pressure. Then, the pushing plate 11 enters the reversing stroke A, which is the first stroke. That is, step 4.
After 11°7, F2=2 is confirmed in step 13.

Then, only the solenoid SbB (see Fig. 3) is energized, and the push plate 11 enters the reversal stroke A, during which time the count N2 is started. Solenoid Sb
By excitation of B [S14], the control valve 20b shown in FIG.
is switched to the left port, and the hydraulic oil from the fluid pump 17 is transferred to the rod side chamber 27 of the cylinder 13 for the plate.
(see figure).

As shown in FIG. 8(a), the pushing plate cylinder 13 is reduced, and the pushing plate 11 is reversed in the direction away from the garbage storage box 1 and becomes approximately horizontal. In this state, garbage and waste are introduced into the packer 3 from the input port 5.

Since N2 is counted at the same time as the pushing plate 11 starts to be reversed, it continues until the count reaches 23, which ends the reverse process A. More specifically, if it is determined in step 15 that the count number N2 is not 23, which is set in advance, α is added to the count number N2 every time the proximity switch 31 detects rotation of the fluid pump 17 (316 )
. Then, the process returns to step 3, and step 4. 11.
7. 13. The process moves to step 15 via step 14, and the count N2 is increased in the same manner. When such an operation is repeated and it is determined in step 15 that N2≧23, the flag F2, which is 2, is replaced with 3 (S17). As a result, a transition is made to the descending stroke B as the primary press of the next stroke.

That is, step 14. 11. 7. 13 and then in step 18, F2=3 is confirmed. Then, the solenoid SbB (see Fig. 3) is demagnetized [S19], and the solenoid SaB is energized to move the push plate 11 into the downward stroke B, during which time a count N3 is started.By the excitation of the solenoid SaB, [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. And Figure 8 (
As shown in b), the slide cylinder 14 is reduced,
The slider 10 is moved along the guide groove 8 together with the pusher plate 11, and the pusher plate 11 starts to descend. In this example, even if the pushing plate 11 encounters waste in the downward stroke B of the primary press, the explanation will be made assuming that the waste is soft or easily crushed by pressure. That is, it is assumed that the descending stroke B ends at N5=38 counts as shown in FIG. 6(b).

Since N3 is counted at the same time as the push plate 11 starts to descend, the counting continues until the count reaches 38, which ends the descending stroke B. To be more specific, if it is determined in step 21 that the count number N3 is not 38, which is set in advance, α is added to the count number N3 every time the proximity switch 31 detects rotation of the fluid pump 17 (S22 )
. Then, it returns to step 3, and steps 4 and 11
．． The process moves to step 21 via 7.13.18, and the count N3 is increased in the same manner. When such operations are repeated and it is determined in step 21 that N3≧38, the flag F2, which is set to 3, is replaced with 4 (S23). As a result, a transition is made to the forward rotation stroke C as the next stroke, a secondary press.

In this example, when the pushing plate 11 collides with the hard waste 34 (see FIG. 6(a)) during the normal rotation stroke C and performs the inching operation, a part of the normal rotation stroke C is A diagonal crushing stroke Bc4 in which the pushing plate 11 is moved in the direction of the arrow 38, which is a combination of a temporary forward rotation operation that continues to follow and a temporary upward operation that traces a part of the downward stroke B in the opposite direction. is now being carried out. However, a case will be described below in which the waste 34 is soft and crushable without scattering. Since F2 has been replaced with 4, the process returns to step 3, moves from step 4 to step 24 via steps 11, 7, 13, and 18, and confirms that flag F2 is 4. As shown in FIG. 7(e), first, the solenoid SaB is demagnetized [S25], while the demagnetized states of the solenoids SaA and SbA are also maintained (326).
. Subsequently, it is determined whether the flag F3 is 0 or not [S27]
, Since F3 is set to 0 in step 2, solenoid SbA [see Figure 3] is energized [S28], and as shown in Figure 8 (
As shown in c), the pushing plate cylinder 13 extends and the pushing plate 11 starts normal rotation.

Here, measurement of the count number N4 for controlling the normal rotation stroke C is started. If the waste material 34 is soft or easily crushed by pressure, the pressure Pc of the hydraulic fluid in the pushing plate cylinder 13 will not become very high.

Therefore, 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 O (S30), and the process proceeds to step 31, where the state of flag F3=O is maintained [S
31], it is determined whether the count number N4 after the push plate 11 transitions to the normal rotation stroke C has reached 39 (S
32). Count number N4 with signal from proximity switch 31
The count number α during that time is added to [S33], and the process returns to step 3. Then, the count number N4 is increased while following the same route. In this way, if N4≧39 in step 32, flag F2, which is 4, is replaced with 5 (S34). Then, the process returns to step 3 and follows step 7 and IL 13.18.24 to reach step 35. As a result, the operation command means 29:
A command to move to the next stroke, the upward stroke, is issued. That is, as shown in FIG. 7(g), solenoid SbA is demagnetized (S51), and solenoid SaA is energized [S5
4], switch the control valve 20b to neutral and switch the control valve 20a to the right port [see FIG. 8(d)]. In this way, the pushing plate 11 moves to the upward stroke.

Next, if the waste material 34 is hard to be crushed and the pushing plate 11 cannot be continuously moved up to the count number N4 of 39 in the forward rotation stroke C for secondary pressing, that is, the central part of the present invention The case of operation will be explained.

When the pushing plate 11 encounters the hard waste 34 that has been thrown in, for example, when the count number N4 is 22 [see FIG. 6(b)], and the waste 34 is not crushed, the piston side chamber 28 of the pushing plate cylinder 13 [ (See Figure 3) pressure increases. In addition,
At this time, the pushing plate 11 enters the pushing stroke Ca, but the excitation of the solenoid SbA is maintained (S2B). This pressure increase is determined by the pressure sensor 33 to be 155 kg/cIa, for example, before the relief pressure reaches 160 kg/cIa.
/c+j is detected as an inching pressure Pi. In this way, when the detected pressure Pc becomes larger than Pi (
S29), the inching operation starts from the position G [see FIG. 6(a)].

Since inching is now about to start, the number of inching times is not X≧3 (S36), and the process does not proceed from steps 31 to 33. Therefore, at this point, the measurement of the count number N4 of the normal rotation stroke C is temporarily stopped at a count of 22. Then, at the start of this inching operation, the pushing plate 11 presses the hard waste material 34 and comes to a stopped state, or
Furthermore, it becomes a state where it rotates slightly in the normal direction, and the pressing stroke Ca
to go into.

On the other hand, counting of the time count N5 in the pressing stroke Ca is started, and α is added to N5 based on the rotation of the fluid pump 17 (S37). Next, it is asked whether the count number N5 has reached 7 [838], and 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 ．．
18.24, N5 is increased in step 37 shown in FIG. 7(e), and the process proceeds to step 38. Since the count number N5 has not yet reached 7, the same electrical signal circulation as described above is repeated until the count number N5 reaches 7, and in step 38, the count number N5 is
When it is determined that N5≧7, the pushing plate 11 stops at the position H [see FIG. 6(a)] or is held in a state where it encounters and stops, and N5≧7 is reached. The current count is reset to 0 (S39).

By the way, in the explanation of this example, when the inching operation starts,
That is, when Pc≧Pi in step 29, the count N4 is not added in step 33 during that time. Therefore, the count N4 in the normal rotation stroke is counted only in the portion shown by the two-dot chain line in FIG. 6(b), and the normal rotation stroke ends when N4 reaches 39 (332).

However, the count N4 may continue to be added even during the pressing stroke Ca that constitutes a part of the normal rotation stroke during the inching operation and the oblique crushing stroke Bc4 that has a component of the normal rotation stroke. However, the pressing stroke Ca and the oblique crushing stroke B
The amount of normal rotation of the tip of the pushing plate 11 at c4 depends on the nature of the waste. Therefore, in an extreme case, the count is added even when the waste is hard and the forward rotation is zero during inching, so the count number N4 approaches or exceeds the count 39 at the end of the forward rotation stroke.

Even if N4≧39, if the tip of the pushing plate 11 is far before the guide surface 7 (see FIG. 1), the dirt will not be pushed up completely during the upward stroke.

Therefore, if the count number N4 is to be continued during the inching operation, consideration should be given to subtracting the current count number N4 by a predetermined count number, for example 15, when one inching operation is completed. preferable.

That is, the count numbers N6 and N7 at step 50
When clearing , the calculation N4=N4-15 is performed. If this is done, the start of the first inching operation will be N4=22, as explained in accordance with FIG. 6(b).
At the end, N4 =22+7 +12-15=
26. When entering the forward rotation stroke and entering the second inching operation at the 4th count, at the end of that operation, N4 = 2
6+4+7+12-15=34. Therefore, in this case, after 2 inching operations, 5
N4 exceeds 39 when the force exceeds 39, and the upward stroke starts from that point. If the above predetermined count number 15 is not subtracted, at the end of the first inching operation, N4 = 22 + 7 + 12 =
41, the normal rotation stroke ends, and inching is performed only once, and furthermore, the tip of the pushing plate 11 starts rising at a position away from the guide surface 7.

Since the pressing stroke Ca of the first half of the inching operation was performed in this way, the number of inching times
1 is added to [S40], and it is further asked whether X≧3 (S41). Then, since X=1, F3, which was set to O in step 2, is set to 1 (342)
. Return to step 3 and step 4. 11.7. 13
．． After 18.24, it is determined in step 27 that F3 is not 0, F3=1 is confirmed [S43], and the pushing plate 11 enters the oblique crushing stroke Bc4 [see FIG. 6(b)].

As shown in FIG. 7(f), the solenoid SbA and the solenoid SaA are energized, and the control valve 20b whose right port is open is left as it is, while the control valve 20a, which was in the neutral position, is energized. can be switched to As shown in FIG. 8(e), the hydraulic oil from the fluid pump 17 is supplied to the piston side chamber 24 (see FIG. 3) of the slide cylinder 14, which causes the slide cylinder 14 to expand and move the slider 10. Guide groove 8 integrated with push plate 11
descend along the At the same time, the push plate cylinder 13, through which the return oil from the rond side chamber 23 is supplied to the piston side chamber 28, is extended. As a result, the push plate 13 moves in the direction of arrow 38, which is the combination of the temporary upward movement that follows part of the downward stroke B in the opposite direction, and the temporary normal rotation operation that follows part of the normal rotation process C. Enters the moving oblique crushing stroke Bc4 (S4
4) (See Figure 6 (a)) At this time, counting of N6 is started, and if N6 ≧ 12, which ends oblique crushing, has not been reached (S45), α based on the rotation of the fluid pump 17 becomes the count number. It is added to N6 (S46). Then,
Returning to step 3, the process goes through step 43 again (see FIG. 7(e)), and in step 46, α is further added to N6 (S46).

In this way, when N6≧12 is reached (S45), the oblique crushing operation of the pushing plate 11 is completed, and the count number N7 of the time rise is calculated (S47).

As mentioned above, N7=7 [see Figure 6(a)]
, Furthermore, flag F3, which is set to 1, is replaced with 0 (348). Here, the above N7 is added to the count number N8 in the upward stroke, which is set to 0 (S4
9). That is, it is set as N8-7 [see FIG. 6(b)]. In addition, N6 and N7, which became 12 and 7, are 0
(S50), returns to step 3, and in step 26 shown in FIG. 7(d), the solenoids SbA, S
aA is demagnetized, and step 27 is reached. Since the flag F3 is set to O in step 48, the solenoid SaB is energized [S28], and furthermore, in step 29, the working pressure to the pushing plate cylinder 13 is increased to the inching pressure Pi during the secondary press currently being performed. If the pressure does not increase, the process proceeds from steps 30 to 33, and the N4 count, which was previously stopped when the inching operation was started, is restarted. Then, the process returns to step 3 and continues until the count number of the secondary press process reaches 39.

If the working oil pressure exceeds the inching pressure Pi again during that time, [
S29], the above-mentioned inching operation, that is, step 3
7 and reaches step 39, where X is already l.
1 is added to (S40). Thereafter, the inching operation is performed as explained above, and when the inching operation is completed, the process returns to step 3. During this second inching operation, N
The addition of 4 is stopped as described above. and,
As shown in FIG. 6(b), in this example, the inching operation is performed up to three times [see FIG. 5(b)], so if X≧3 is confirmed in step 41, the process proceeds to step 31. , and the addition in step 33 is repeated until N4≧39 in 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 is ignored in step 3.
3, the addition of N4 continues. If N4≧39, [S
32], F2 is set to 5 in step 34 and the process returns to step 3, and the pushing plate 11 does not rotate forward any further.

When the inching operation is performed three times as described above,
The count number N8 in the temporary rise that traces a part of the downward stroke B in the opposite direction is 21 [see FIG. 6(b)], and is 14 in the case of 2 times. Of course, it goes without saying that the value is 0 if the inching operation has never been performed. By performing the inching operation in this way, even if the waste material 34 is hard, the places to be pressed by the pushing plate 11 are different, so it is possible to search for places that can be crushed, and furthermore, it is possible to knock down the hard waste material 34. It is also possible to change the attitude of the waste material 34. Incidentally, in the case of a conventional device such as the present invention which cannot perform inching operation, the pushing plate 11 only rotates in the normal direction, and if it encounters hard waste during its downward movement and reaches the relief pressure Pj. , push plate 11
In the above example, N4=22.
39-2
2 = A situation arises in which the relief pressure Pj is maintained until a count of 17 or more is obtained. However, in the present invention, the relief pressure Pj is released in a short period of time until N5 exceeds 7, that is, when N4 = 22 + 7 = 29 when applied to N4, and the action of the large load acting on the fluid pump 17 and cylinder 13 is released. You can shorten the time it takes.

In addition, in the above example, the count number during the second and subsequent inching operations was not illustrated, but as shown in FIG. 6(b), the count number N4 in the forward rotation stroke C For example, the start time is 22, and by the time the second start, that is, the next inching pressure Pi is detected,
If it's a count, then 22+4=26. If, 3
If N4 has not reached 39 after the inching operation [S32], for example, if N4 = 35, the push plate 11 will take the forward rotation stroke C by the remaining count number, that is, 39-35 = 4, and then Move on to the upward stroke. Furthermore, as shown in Fig. 5(b), when the inching operation is performed three times, the upward stroke is already N8=21, so the N8 of the predetermined upward stroke is set to, for example, 63. If there is, a count of 42 will remain. By the way, if the inching pressure Pi becomes lower than the inching pressure Pi by the time it reaches 7 after detecting the inching pressure Pi and starting counting N5, that is, as shown in FIG. 6(C), the inching pressure is lower than the inching pressure Pi when N5=5 If this happens, the state where the inching operation was about to occur is canceled, and the pushing plate 11 continues the secondary pressing. Of course, if the inching pressure Pi is detected again, it goes without saying that the inching operation starts from that point.

Next, the operation during the normal upward stroke will be explained.

Depending on the number of inching operations, the upward stroke is performed only on the remaining bone. Therefore, the count number N8 in the upward stroke is a multiple of N7, that is, either 0.7°14 or 0.7°14 or 21. First, returning to step 3 in FIG. 7(a), it is confirmed that F2 is not 4 in step 24 and 5 in step 35 (S35), and the solenoid sbA is demagnetized in FIG. 7(g). CS51)
. Then, it is asked whether the flag F4 is 1 [S52],
Since F4 has been reset to 0 in step 2, the count number α based on the rotation of the fluid pump 17 is added to the count number N8 in the upward stroke [S53], and the solenoid SaA is excited (S54). That is, the pushing plate 11 indicated by the two-dot chain line in FIG. 8(d) enters the lifting operation. Then, it is determined whether or not the pushing plate 11 has reached the count number 53 of rising along the guide surface 7 to the opening 4 of the packer 3 [S55], and if it has just started rising, the process passes through step 56. Step 58 is skipped and the process returns to step 3. In the same manner as above, the process returns to step 52, where a count number α based on the rotation of the fluid pump 17 is added to increase N8 (S53).

In this way, if N8≧53 in step 55, [
See the solid line pushing plate 11 in FIG. 11 enters the operation of the pushing stroke E (see FIG. 1) [see FIG. 8(f)]. At this time, the slide cylinder 14
The return oil from the piston side chamber 2 of the cylinder 13 for the push plate
8, the extension of the slide cylinder 14 and the extension of the push plate cylinder 13 are performed simultaneously, and the push stroke E
As a result, the waste 34 is completely pushed into the garbage storage box 1. In the pushing stroke E, the count number N8 is 6.
Continue until you reach 3. N8≧63 in step 56
When the flag F4 reaches 1, the flag F4, which was 0, is set to 1 (358). Further, return to step 3 and step 52
When F4=1 is confirmed, the flag F1, which was replaced with 2 in step 6, is set to 0 (S50). Returning to step 3, Fl = 0 is confirmed, and Fig. 7(a)
As shown in , solenoids SaA and SbA are demagnetized [S60].

This ends the operation of the -cycle, but if it is necessary to repeat the next cycle (S61), step 1
will be returned to. On the other hand, if there is no need to enter the next cycle, this operation ends. Incidentally, in a device that is set to automatically enter the next cycle after the completion of the - cycle, in step 61, the garbage pushing mechanism will continuously perform the next operation. In that case, Fig. 7 (a
), the process returns to step 2 as shown by the dashed line.

Note that in the cycle motion of the dust pushing device described above, the time required for each stroke is calculated by integrating the count based on the pump rotation from the proximity switch 31, but instead of this, the time required for each operation is A timer is used to control, e.g. step 37 in FIG. 7(e).
Then, time integration may be performed. The same applies to other strokes, and the dust pushing control device can be operated smoothly.

In the above explanation, although the -cycle is a rising stroke including the pushing stroke E, it may be a rising stroke that does not include the pushing stroke E. Furthermore, the present invention is not limited to a cycle consisting of four main strokes, but can also be applied to a cycle consisting of three strokes without a normal rotation stroke, for example.

Incidentally, when the pushing plate 11 is difficult to be crushed in the above-mentioned operation, the pushing machine 11 as described in the present invention rotates from the pressing stroke Ca to a part of the normal rotation stroke C, and a part of the downward stroke B. In the descending stroke B, an operation may be performed in which the temporary ascending movement in the opposite direction and the oblique crushing stroke Bc4 are combined.

[Brief Description of the Drawings] Fig. 1 is a side view of the overall configuration of the garbage pushing device in the garbage truck, Fig. 2 is a schematic perspective view of the measuring unit for detecting the count based on the rotation of the fluid pump, and Fig. 3 The figure is a block diagram of the cycle motion mechanism, Figure 4 is a schematic block diagram of the operation command means, Figure 5 (a) is an operation time chart of the solenoid that operates in the case of crushable waste, and Figure 5 (b) Figures 6 (a) to (c) are solenoid operation time charts when the pushing plate encounters hard waste and repeats the inching operation.
is an explanatory diagram of the operating state of the pushing plate in the normal rotation stroke, Fig. 7 (
a) to (g) are flowcharts of the cycle motion by the garbage pushing device, and FIGS. 8(a) to (f) are operation state diagrams of the pushing plate in each stroke including the oblique crushing stroke and the pushing stroke in the cycle motion. . 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, Bc
4.-Diagonal crushing stroke, C--Forward rotation stroke, Ca--1 pressing stroke, G-Position where a sudden increase in working oil pressure occurred, H.-
End position of the pressing stroke. Patent applicant Kyokuto Kaihatsu Kogyo Co., Ltd. Agent Patent attorney Katsutoshi Yoshimura (and one other person) Figure (C) Figure (b) Figure (c) Figure (d) Figure (a) Figure (C) Figure (b) Figure (d) Figure (e) Country (f)

Claims (1)

[Claims] (1) A slider that is mounted inside a packer connected to the rear of the garbage storage box and is raised and lowered by a slide cylinder, and a push plate that is pivotally supported by the slider and rotates forward and reverse by a push plate cylinder. , in the garbage pushing control device that controls the slide cylinder and the pushing plate cylinder and causes the pushing plate to perform a cyclic motion, the waste thrown into the packer is hardened in the normal rotation stroke in which the pushing plate secondary presses the waste. By pressing the waste, the working pressure in the cylinder for the pushing plate shifts from the position where it suddenly rises to the pressing stroke where the pushing plate temporarily presses in the direction of the secondary press, increasing the working oil pressure. If you finish the pressing stroke in this state, from the end position of the pressing stroke,
An operation command means is provided for further sustaining the normal rotation stroke of the pushing plate and at the same time performing a diagonal crushing stroke in which it is temporarily raised, and then shifting to a normal rotation stroke for secondary pressing again. A garbage pushing control device for a garbage truck, which is characterized by: