JPS6010962B2 - Scraping operation control device for garbage collection vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scraping operation control device for a garbage collection vehicle.

Generally, the sequential operation of a garbage treatment device is performed by detecting the operating limit position of each component of the garbage treatment device using electrical contacts, and appropriately supplying the signal to the electromagnetic switching valve of the actuator for operating the garbage treatment device. ing.

On the other hand, it is known that the above-mentioned garbage processing device is composed of a lifting member that moves up and down with respect to the garbage processing frame, and a scraping plate that rotates with respect to the lifting member, but the operating limit of the scraping plate is As mentioned above, the position is not fixed in relation to the garbage processing frame, and it is very difficult to detect the operating limit position of the scraping plate using only electrical contacts.

Therefore, the sequential operation of the garbage processing device is controlled through a limit detection means such as an electric contact and a set time detection means such as a timer. The lifting member may rise due to the reaction force, and in this case, the detection of the limit position of the lifting member is cut off, and the scraping operation of the scraping plate stops and moves to the next stroke, ensuring sufficient scraping. The disadvantage is that no action is taken.

The present invention has been made in view of the above points, and an object thereof is to provide a garbage collection vehicle that can accurately continue the sequential operation of a garbage processing device even if the elevating member is raised during the raking operation using the raking plate. It is. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a garbage storage box that is mounted on a body frame 2 of a garbage collection vehicle, and has a gate 3 at the rear, and a rear end base is attached to the body frame 2. The dump cylinder 5 is pivotably supported 4 and is disposed between the storage box 1 and the vehicle body frame 2, and the dump cylinder 5 is extended and retracted to perform dumping as appropriate.

Reference numeral 6 denotes a frame mounted in the opening 3 of the storage box 1, and is connected to the rear upper end of the storage box 1 by a pivot 7 so that the frame can be moved.

The frame body 6 has an input port 8 closed at the lower part of the back surface thereof, and a garbage storage chamber 9 is formed at the lower part thereof.
A scraping device A that scrapes up the garbage thrown in from the input port 8 upward from the storage chamber 9, and a pushing device B that pushes the garbage on the scraping device A into the storage box 1 are arranged. This constitutes the garbage processing equipment.

First, to explain about the scraping device A, a lift cylinder 1 is provided with an elevating member 11 having one end pinned to the rear of the frame 6.
The lifting plate 13 is rotatably mounted on the other end of the elevating section 11 and pivoted 14, and the lifting plate 13 is rotated by the expanding and contracting operation of the pack sill 15.

As mentioned above, the foot cylinder 12 has its base end supported on the outer side surface of the frame body 6, and the tip of the piston rod is supported on the side surface of the frame body 6.
The elevating member 11 is supported at the intermediate portion through a guide groove 16 cut out with the center at 0, while the pack cylinder 15
The base end of the piston rod is connected to the middle part of the lifting plate 13, and the tip of the piston rod is connected to the shaft support of the lifting member 1. Further, the pushing device B has a shaft 17 mounted on the upper inner wall of the frame 6.
The pushed plate 18 is pivoted back and forth by the telescopic operation of a push cylinder 19, which has its piston rod end attached to the upper end of the storage box 1 and its cylinder base attached to the back of the pushed plate 18.

When the push cylinder 9 is fully extended, the bracket 20 fixed to the rear surface of the push plate 18 and the stopper 21 fixed to the inner wall of the frame 6 come into contact with each other, and the frame 6 is moved around the pivot 7. It is also used when making 22 is the frame 6
It is a lashing claw that locks the storage box in the storage position, and is released and removed as appropriate via the link mechanism 25 by the expansion and contraction of the receiving part 23 fixed to the front lower part of the frame and the lock cylinder 24 installed on the lower surface of the storage box 1. Engagement operates.

Next, the hydraulic circuit will be explained with reference to FIG. 2. P is the hydraulic pump, T is the oil reservoir, V is the pilot-operated dew/hydraulic switching valve of the lift cylinder 12, V2 is the pilot-operated electromagnetic switching valve of the pack cylinder 15, and V3 is the pilot-operated solenoid switching valve of the pack cylinder 15. With the pilot-operated Raiji switching valve of the push cylinder 19, the switching valve V,
Solenoids SoLa and SoLb for operating the valve spool are connected to the valve spool, So and SOW are connected to the switching valve V2, and switching valve V3 is connected to the switching valve V3.
also have Soo and SoLf, and the above switching valves V,...
V2 and V3 form a three-lotus valve V.

V4 is an electromagnetic switching valve for the lock cylinder 24 and has a valve spool operating solenoid SoLh, and V5 is an electromagnetic switching valve for the dump cylinder 5 and has valve spool operating solenoids SoLi and SoLj. In the embodiment, the electromagnetic switching valves V4 and V5 are arranged in parallel with the three lotus collecting valves V described above. V6 is an electromagnetic switching valve that operates when the frame body 6 returns from the swinging state to the retracted state, and has a solenoid SoLg for operating the valve spool. 26 is a safety valve that short-circuits between the discharge pipe 27 of the hydraulic pump P and the oil return pipe 28 to the oil reservoir T; 29;
is a check valve for generating pilot pressure which is installed approximately halfway in the oil return pipe 28.

To explain the electric circuit with reference to Fig. 3, BT is a battery or other power source 1G is a starter switch, SW- is a start switch for loading river waste, and SW-12 is a stop switch to stop the garbage collection work. 3 is the nourishing device A
, a reversing switch for appropriately reversing the pushing operation of the pushing device B, and SW-4 are switches for the buzzer BZ;
W-1, 2, 3 and 4 are provided on the outer wall of the frame 6.

SW-6 is a change-over switch for placing the frame 6 on the floor when discharging garbage, SW-7 is a change-over switch for selecting whether to work with dirt or discharge work, and SW-8 is a change-over switch for dumping the storage box. The switch SW-9 is a function switch that selects whether to continue the garbage loading operation only once or continuously, and SW-6, 7, 8, and 9 are located in the driver's seat. . LS-1 is an electrical contact that operates at the forward limit position of the pushing plate 18, B-2 and LS-3 are link 1
These electrical contacts -1, LS-2 and LS-3 constitute a limit position detection means. Melon-4 is an electrical contact that operates when the lashing claw 22 is detached from the receiving part 23, Yamaichi 5 is an electrical contact that operates when the storage box 1 is in the storage position, and LS-6 is an electrical contact that operates when the lashing claw 22 is detached from the receiving part 23. Electrical contact that operates at approximately 45 degrees of forehead movement, LS-7
B-8 is an electric contact that operates at the storage position of the frame body 6, and P.
T. ○ is P. T. ○This is an electrical contact that operates when the lever L is turned to the lower position. SoLk is a solenoid that fixes an accelerator (not shown) with a constant pressing force during garbage loading work, and urges the engine to accelerate. TR-1,
TR-2 is a time-limiting vertical electric device (hereinafter referred to as a timer relay) which is a time setting means, and has contacts tr-1 and tr-2, respectively.
CR-1, CR-2, CR-3, CR-4
, CR-5, and CR-6 are electromagnetic relays (hereinafter referred to as relays), and are cr-1, Cr-2, Cr-3, and CR-3, respectively.
Cr-3', Cr-3'', Cr-4, Cr-4', Cr
-5, Cr-5'cr-6. KR is a type of relay, called a keep relay, and has a flashlight, kr'.

PL-1 is P.L. T. ○Pilot lamp to display bushes,
PL-2 is a pilot lamp indicating that the lift cylinder 12 is in an extended operating state.

To explain the operating order and operation of this invention, the electric circuit shown in FIG. This shows the state of the lifting member 11 immediately after the loading work into the storage box 1 shown in FIG.
is in the raised position and the push plate 18 is in the forward position, so that the electrical contacts -1 and LS-2 have been switched from the upper position shown in FIG. 3 to the lower position. If you want to carry out only one cycle of garbage loading from this state, P. T. Turn ○ into an acid to drive the hydraulic pump P, and after confirming that the head operation display pilot lamp PL-1 lights up, turn on the changeover switch SW-7.
to the left position and selector switch SW-9 to the downward position.

(The selector switches SW-7 and SW-9 are equipped with these functional switches and movement switches SW-7', SW-9',
and SW-9'' are provided to switch in the same direction.) After this, garbage is inputted into the storage chamber 9 of the frame body 6 from the input port 8,
When the starting switch SW-1 is operated, the current flows from the battery BT to the starter switch IG to the electric contact B to the switching switch SW-7 to the starting switch SW-1 to the contact cr.
2- flows to relay CR-1 and activates relay CR-1,
Since the contact cr-1 of the relay CR-1 is left behind, the current further flows to the switching switch SW-7, the contact cr-1, the switching switch SW-9, the contact cr-2, and the relay CR-1. 1 self-holding circuit is formed. As mentioned above, since the state shown in FIG. 4a, that is, the elevating member 11 is in the raised position and the push plate 18 is in the forward position, current flows through the changeover switch SW-7, the contact CR-1, and the solenoid SoLk. to maintain the engine at a constant speed increase state, and at the same time, the flow flows to the other electrical contact B-3 - electrical contact B-1 - timer relay TR-1, and then to timer relay TR-1.
Since it branches from the front and flows to the contact cr-4'-sole/ide SOW, switch the switching valve V2 to the right position.

Therefore, the oil discharged from the hydraulic pump P is discharged from the discharge pipe 27.
Ippomero 31 All switching valve V2 Ichibero 36 - Pack cylinder 1
5, and the simulated oil flows from pipe 35 to total switching valve V2 to pipe 4.
0 Returns to glance path 28 - check valve 29 - oil reservoir T, so the pack cylinder 15 operates slightly vertically, and the scraping plate 1
3 is reversely operated around the ball support 14 to reach the state shown in FIG. 4b. On the other hand, the timer relay TR-1, which is set to the time required for the pack shilling 15 to go from the most extended state to the least striped state, is activated when the rake plate 13 completes its reversal operation.
Since the contact low 1 is activated, the timer relay TR
-1 The current branched from the front is contact tr-1 - relay CR
-4, the contact cr-4' is disconnected to prevent current from flowing to the solenoid SOLd.
4 is connected to energize the solenoid SoLb.

Therefore, since the switching valve V2 is returned to the neutral position and the switching valve V is switched to the right position, the oil discharged from the hydraulic pump P is transferred from the discharge pipe line 27 to the pipe line 30 to the switching valve V.
, Ippomero 34 - flows to the lift cylinder 12, and its Enoki E
The oil returns to the pipe line 33, all switching valve V, one line 39, one line line 28, and the oil reservoir T, and the lift cylinder 12 is operated to reduce.

The lifting member 11 is lowered by the striped movement of the lift sill 12 and reaches the position shown in FIG. Switch to position. Therefore, since the current is prevented from flowing in the direction of the electrical contact LS-1, the solenoid S
Cut off the bias to oLb and return the switching valve V to the neutral position,
On the other hand, it flows to timer relay TR-2. Furthermore, the current branched from the front of timer relay TR-2 is connected to contact cr-5'.
, and flows to the solenoids SOLe and SOLe, so the switching valves V2 and V3 are switched to the left position, respectively.

Therefore, the oil discharged from the hydraulic pump P is distributed between the discharge pipe 27, the glance passage 31, the switching valve V2, the pipe 35, and the pack cylinder 15.
The precious E oil from the pack cylinder 15 flows into the pipe 36.
All changeover valve V2 glance line 40 one line 28 - oil reservoir T
At the same time as the pack cylinder 5 is extended and operated, the oil flows from the pipe line 32 to the sliding valve V3 to the push cylinder 19, and the waste oil flows to the pipe line 38 to the sliding valve V3 to the push cylinder 19.
It returns to the pipe line 41 - pipe line 28 - oil reservoir, and the push cylinder 19 is operated vertically.

At this time, compared to the retraction operation of the push cylinder 19 which simply retreats the push plate 18 in a direction with no load, the pack cylinder 15 which scrapes the dust from the storage chamber 9 onto the scraping plate 13
Since the extension operation requires a large force, the push cylinder 19 will first be extended a little, and then the pack cylinder 15 will be extended. As a result, the pushing plate 18 retreats and the scraping plate 13 reaches the position shown in FIG. 4d. Then, the timer relay TR-2, which is set in accordance with the time it takes for the scraping plate 13 to reach the scraping end position, is activated to operate its contact tr-2, and the electric current from the electric contact -3 is transferred to the timer relay TR-2. Along with relay TR-2, it flows through relay CR-6 and contact tr-2 to relay CR-5, and its contact cr-
5 is turned on, and cr-5' is turned off. Therefore, the current flows through contact cr-5 - electrical contact Yama-1 2 - solenoid SoL
a, switching the switching valve V to the left position, cutting off the energization to the solenoids SoLc and SoLe, and returning the switching valves V2 and V3 to the neutral position. In addition, when the scraping plate 13 is scraped with the expansion operation of the pack cylinder 15, when the link 11 is lifted due to the reaction force generated by scraping into the garbage, the electric contact LS-3 is switched upward. Since the power supply to timer relay TR-2 is cut off and the next step is to proceed before the scraping operation is sufficiently completed, the current flows from contact CR-3' to contact Cr.
-6- flows to relay CR-6 to form a self-holding circuit to relay CR-6, and at the same time timer relay TR-2
Since energization is continued, even if a rise occurs due to the reaction force of the link 11, the scraping operation continues until the set time, and the insufficient scraping operation described above will not proceed to the next step.

On the other hand, the biasing of the switching valve V to the left position is performed by the hydraulic pump P.
The oil discharged from pipe 27 - pipe 30 is guided to the changeover valve V, glance passage 33 - lift cylinder 12, and the waste oil is passed to pipe 3
4 all switching valves V, Ichime passage 39, Ichime passage 28 - return to the oil reservoir T, so the lift cylinder 12 is extended and lifts the elevating member 11 while keeping the dirt loaded on the scraping plate 13. (Figure 4e).

In this case, as the elevating member 11 rises, the electrical contact becomes -3
is switched upward, but since the current flows from the electrical contact LS-3 to the electrical contact LS-2 to the solenoid Solenoid, the switching valve V continues to be energized to the left position.
While the current continues to energize the solenoid SoLa, the current also branches to the upper part of FIG.
' Pilot lamp PL-2 to indicate the elevation of the elevating member
is energized to indicate that the elevating section 11 is being raised.

When the lifting member 11 reaches the highest position, that is, the position where the scraping plate 13 finishes scraping, the electrical contact LS-2 switches to the lower position, cutting off the current to the solenoid SoLa and turning off the pilot lamp PL-2. While the light is turned off, current flows to the solenoid SoLf and switches the switching valve V3 to the right position.

Therefore, the oil discharged from the hydraulic pump P flows from the pipe line 27 to the pipe line 32 to the all-change valve V3 to the all-change valve V3 to the push cylinder 19, and the waste oil flows to the pipe line 37 to all-change valve V3 to the all-change valve V3 to the all-change valve V3 to the oil reservoir T. , the bush cylinder 19 is extended and the pushing plate 18 moves forward so as to push the garbage loaded on the scraping plate 13 into the storage box 1. On the other hand, the current from the electrical contact LS-2 flows through the solenoid So
Since the relay CR-3 is energized together with Lf, the contact cr-3 is subsequently turned off, and cr-3' is turned off and cr-3'' is energized.

Therefore, relay CR-3 forms a self-holding circuit by allowing current to flow through contact cr-3, selector switch SW-9, and movement switch SW-9', and also forms a self-holding circuit through contact
The disconnection of r-3' interrupts the self-holding circuit to relay CR-6. When the pushing plate 18 reaches the forward limit position and the state where pushing into the storage box 1 is completed (FIG. 4f), the electric contact B-1 is switched to the lower position, so that the current flows through the electric contact L.
S-3 - Electrical contact LS-1 All changeover switch SW-9 and interlocking switch SW-9'' - Contact CR - 3'' - Relay CR
-2, and disconnects contact cr-2 of relay CR-2.

Therefore, the self-holding circuit of relay CR-1 is cut off, contact CR-1 is disconnected, and no current is passed to the switch SW-7 or below, completing one cycle of dust scraping and pushing work. . On the other hand, when carrying out continuous cycle loading work, switch switch SW-9 to the upper position (
Changeover switches SW-9' and SW-9'' are also switched to the upper position), and then when the start switch SW-1 is set to the twill position, the current flows from the start switch SW-1 to the changeover switch SW-9 to the key relay set to KR. (ST) position, the contact kr is disconnected, and kr' is activated to the wa position (the keep relay has a built-in self-holding circuit, so once it is set (ST))
(If current is applied to the reset (RT) position, the contacts will not switch unless current flows to the reset (RT) position.) Therefore, the current flows through one contact kr' of the changeover switch SW-7, and the above-mentioned reversal and descent of the scraping plate 13, retreat of the pushing plate 18, scraping and raising of the scraping plate 13 are performed in order, and the pushing plate 18 1 by pressing
The cycle ends, but due to the switching of the lower position of electrical contact LS-1, the changeover switch SW-9'' is in the upper position, so the reset (RT) position of keep relay KR is not energized. Therefore, electrical contact LS-1 The current flows through the timer relay TR-1 again and flows through the solenoid SoLd, again repeating the loading operation below the reversal operation of the scraper plate 13.As described above, in the present invention, the scraping operation by the scraper plate 13 is repeated. Even if the elevating member moves during operation, a constant scraping operation is continued, and there is an effect that malfunctions such as moving to the next stroke with insufficient scraping operation are eliminated.

In addition, in the embodiment shown in FIG. 1, the garbage processing device is composed of a raking device and a pushing device, but as shown in FIG. 5, the raking device also serves as a pushing device. However, the invention is not limited to these examples.

Furthermore, in the embodiment, the operation of the rake plate is detected at a set time, and the operation of the lifting member is detected at the limit position, and the operations are performed sequentially, but it is possible to perform the operations sequentially by detecting only at the limit position. You can also do that.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a garbage collection vehicle showing the first embodiment, Fig. 2 is a hydraulic circuit diagram, Fig. 3 is an electric circuit diagram, Fig. 4 is a simplified diagram showing the operating order, and Fig. 5 is a diagram of other parts. FIG. 2 is an overall side view of an embodiment of the invention. In the figure, 6 is a frame body, 11 is an elevating member, 12 is a lift cylinder, 13 is a scraping plate, and 15 is a pack cylinder. 1st
Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A frame body having a garbage processing device is tiltably connected to the rear opening of the garbage storage box, and the garbage processing device is equipped with at least an elevating member and a scraping plate rotatably supported by the elevating member. In the garbage collection vehicle configured as shown in FIG. The sequential operation of the processing device is controlled through a limit position detection means such as an electric contact that detects the operation limit position of the lifting member and the scraping plate, or a time setting such as a timer relay that detects the set time in conjunction with the limit position detection means. Control is performed by supplying a signal to each of the electromagnetic switching valves through means, and when the scraping plate operates, even if there is relative movement of the lifting member, the scraping plate operating actuator is controlled. 1. A scraping operation control device for a garbage collection vehicle, characterized in that the electromagnetic switching valve is energized via a self-holding circuit so that the scraping operation by the scraping plate is continued.