JPS63208404A - Garbage loader for garbage wagon - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a garbage loading device for a garbage collection vehicle.

(Prior art) Conventionally, a garbage input box equipped with a garbage loading device having a sliding plate and a pushing plate is connected to the rear opening of the garbage storage box, and during the compression process by this garbage loading device, the garbage is The applicant has proposed a garbage collection vehicle that automatically performs a filling process by changing the compression position of the pushing plate (Japanese Unexamined Patent Application Publication No. 1983-1992).
(Refer to Publication No.-188202).

(Problems to be Solved by the Present Invention) By the way, in the above-mentioned conventional technology, as a result of the closing of the pressure switch, the electromagnetic switching valve v1 is switched, the pressure in the hydraulic system drops and the pressure switch is immediately opened. I will do it.

Since such repeated opening and closing of the pressure switch is performed frequently within the time period in which the compression stroke is set, there is a problem in that the contacts of the pressure switch are worn out.

The present invention has been made in view of the above points, and when compressing garbage, when the compression position of the pushing plate relative to the garbage is changed to automatically perform the filling process, the filling process is started after a predetermined period of time has elapsed. The present invention provides a loading device δ for a garbage collection vehicle that can prevent damage to parts.

(Technical means for solving the problem) The present invention connects a garbage input box equipped with a garbage loading device consisting of a sliding plate and a pushing plate to the rear opening of the garbage storage box, and In the garbage collection vehicle in which the operation of the charging device is sequentially controlled via an electro-hydraulic control device, the electro-hydraulic control device is provided with a pressure switch and a timer linked to the pressure switch,
During the compression stroke of the garbage loading device, after a time set by a timer has elapsed in relation to the operation of the pressure switch, the garbage can be packed into the garbage storage box while performing both the compression stroke and the stuffing stroke. It is something that you have.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIG. A garbage input box 5 is connected by a pivot 4 so as to be tiltable.

The garbage input box 5 has an open front side and communicates with the rear opening 3 of the garbage storage box 2, and also has an input opening 6 opened at the lower part of the back side, and a garbage storage chamber 7 formed in the lower part thereof. .

The garbage input box 5 is equipped with a garbage loading device that compresses and crushes the garbage and stuffs it into the garbage storage box 2.

The configuration of this loading device will be explained below. Guide groove members 8 formed of groove-shaped steel are provided on both side walls of the garbage input box 5.
It is laid slanting from the front upper end toward the rear lower part, and the pivot shaft 4 is pivotally supported at the upper end.

On the other hand, a sliding plate 9 extending over its entire width is housed in the garbage input box 5, and guide rollers 0 are pivoted on the upper and lower sides of both sides of the sliding plate 9, and these guide rollers 0 It is fitted along the inner wall of the guide groove member 8 so as to be freely removable.

A pivot shaft 1 is attached to the upper rear surface of the sliding plate 9 via a bracket.
1 is pivotally supported, and this pivot 11 is connected to the guide groove member 8.
It projects outward from the inside of the garbage input box 5 along the back surface and beyond a notch 12 formed in the side wall of the garbage input box 5 so as to match the sliding distance of the sliding plate 9.

A first telescopic cylinder 13 provided between the outwardly protruding pivot 11 and the lower outer side of the garbage input box 5 is connected along the inclination direction of the guide groove member 8 and deviated upward. The sliding plate 9 can be reciprocated along the guide groove member 8 by the expansion and contraction operation of the cylinder 13.

It should be noted that one end of a second telescopic cylinder 17 is also pivotally attached to the pivot shaft 11 pivotally attached to the upper back surface of the sliding plate 9, as will be described later.

Further, at the lower end of the sliding plate 9, a pushing plate 14 that extends completely in the width direction of the garbage input box 5 is attached to a shaft support 14 so as to be able to swing back and forth.
5, a second telescopic cylinder 17 is connected between a protruding piece 16 protruding from the rear surface of the pushing plate 14 and a pivot 11 pivotally attached to the upper rear surface of the sliding plate 9. By the expansion and contraction operation, the pushing plate 14 can be swung back and forth around the shaft support 15.

That is, by sequentially controlling the expansion and contraction of these telescopic cylinders 13 and 17, the filling state shown in FIG. 1(a) is changed to the reversal stroke shown in FIG. Each operation of a crushing stroke and a compression stroke shown in FIG. 1(d) can be performed.

Next, the hydraulic circuit will be explained with reference to FIG. 2. P is the hydraulic pump, T is the oil reservoir, vl is the electromagnetic switching valve of the first telescopic cylinder 13, v2 is the electromagnetic switching valve of the second telescopic cylinder 17, and the electromagnetic switching valve is v1 is solenoid 5OLa,
5OLb, the solenoid switching valve v2 is the solenoid 5OLc,
5OLd each.

Moreover, PS is a pressure switch, and the second telescopic cylinder 1
It is connected to a circuit that communicates with the piston back pressure side oil chamber of No. 7.

Next, to explain the electric circuit diagram with reference to Fig. 3, SWI is a selection switch for selecting garbage loading work or garbage discharge work, SW2 is a start switch for the garbage loading device, SW3 and SW4 are stop switches, and ps is a selection switch for selecting garbage loading work or garbage discharge work. This is the electrical contact of the pressure switch PS mentioned above.

The LSI is an electric contact that detects the upper limit position of the sliding plate 9,
LS2 is an electric contact that detects the lowering limit position of the sliding plate 9;
LS4 is an electric contact that detects the forward swing limit position of the push plate 14, and LS3 is an electric contact that detects the backward swing limit position.

Among these electrical contacts, the LSI and LS2 are arranged between the garbage input box 5 and the sliding plate 9, with an operating body disposed on one side and an electrical contact on the other.

Further, the electric contacts LS3 and LS4 are arranged on the back surface of the sliding plate 9, and are controlled to be switched by guiding the back and forth swinging of the pushing plate 14 by a link mechanism.

R1, R2, R3, R4, R5, R6, R7 are relays, and have contacts rl, r2 . r3゜r4. r5.
r6. It has r7.

Further, TI, T2, and T3 are timers, and have contacts tl, t2, and t3, respectively.

B is a power source.

Next, to explain the operation process of the embodiment of the present invention with reference to FIG. 1, the solid line (a) in FIG. Both the first and second telescoping cylinders 13.17 are extended, the sliding plate 9 is in the raised position, and the limit switch L
SI is activated, and furthermore, the push plate 14 is in the forward swing position and the limit switch LS4 is activated.

In this state, when garbage is input into the storage chamber 7 of the input box 5 through the input port 6, the selection switch SWI is switched to the upper position in Fig. 3, and the start switch SW2 is operated, the relays R1 and R2 are self-held. Electrify solenoid 5OLd.

As a result, the electromagnetic switching valve ■2 is switched to the left position and only the second telescopic cylinder 13 is contracted, as shown by the chain line (b) in Figure 1.
As shown in FIG. 2, the push plate 14 is turned over until both sides thereof are in substantially horizontal positions.

When the push plate 14 reaches the limit reversal position, the limit switch L is activated.
S3 is activated, relay R3 is self-held, and at the same time, energization to relay R2 is canceled.

As a result, the solenoid 5OLa is energized at the same time as the electromagnetic switching valve v2 is returned to the neutral position, and the electromagnetic switching valve V1 is switched to the left position.

Then, the first telescopic cylinder 13 is contracted and enters the garbage crushing process, and the sliding plate 9 descends along the guide groove member 8, and the pushing plate 14 connected thereto is moved by the chain line (b) in FIG. )
As shown in (c), the front surface thereof descends in parallel while maintaining a substantially horizontal state, and the input garbage can be crushed between the pushing plate 14 and the arcuate surface of the bottom surface of the input box 5.

When the push plate 14 reaches the lowering limit position, the limit switch L is activated.
S2 is activated to self-hold relay R4, and at the same time, energization of relay R3 is canceled.

Therefore, the current flows through the solenoid 5OLc, returning the electromagnetic switching valve v1 to the neutral position and simultaneously switching the electromagnetic switching valve v2 to the right position.

As a result, the second telescopic cylinder 17 operates to extend from the state where the crushing of the garbage is completed as shown by the chain line (c) in FIG. 1, and the pushing plate 14
With the shaft support 15 as a fulcrum, it swings clockwise until its front surface becomes approximately vertical as shown in the dashed line (d) in Figure 1, and enters the compression stroke, where it is temporarily crushed in the previous stroke. The garbage is secondarily compressed between the pushing plate 14 and the flat bottom surface of the input box 5.

At that time, due to the action of the link mechanism, the limit switch LS
4 is activated, relay R5 is self-held, and at the same time, the energization of relay R4 is canceled.

As a result, the first telescopic cylinder 13 extends from the end of the compression stroke shown in the chain line (d) in FIG. It rises in parallel and can pack the garbage compressed in the previous step into the garbage storage box 2.

Note that (C) from the inversion completed state shown in FIG. 1(b)
In the crushing process leading to
3, but at the same time, timer T2 continues to be energized.

Therefore, when the sliding plate 9 starts descending and a set time elapses, the contact t2 is closed and the relay R7 is activated.

Therefore, relay R4 is energized via contact r7, and relay R3 is de-energized to stop the sliding plate 9 from descending.
Furthermore, the compression stroke by the pushing plate 14 is caused to proceed as described above via the contact point r4.

In this way, the sliding plate 9 is prevented from descending by the dust,
Even if the crushing limit position cannot be reached, that is, even if the limit switch LS2 is not switched, it is possible to proceed to the next compression stroke after a certain period of time has elapsed.

Further, when the relay R4 is energized to shift to the compression stroke, the limit switch LS3 is switched and the energization to R7 is cut off, so that the timer T1 continues to be energized via the contact r7.

Then, after a certain period of time has elapsed, relay R6 is activated via contact tl, and relay R5 is further energized via contact r6 to self-hold.

Therefore, since the power supply to relay R4 is cut off, the compression stroke by the pushing plate 14 is stopped, and the sliding plate 9 moves up, that is, the stuffing stroke begins.

In this way, even if the pushing plate 14 is prevented from being compressed by dust and cannot reach the compression limit position, that is, even if the limit switch LS4 is not switched, it is possible to proceed to the next stuffing stroke.

By the way, the garbage thrown into the storage chamber 7 undergoes a crushing process.
If compression cannot be achieved in the compression stroke, the timer TI moves to the stuffing stroke, but if the pushing plate 14 has not rotated around the shaft support 15 to at least a nearly vertical position, the dirt is moved to the garbage storage box 2. It becomes impossible to fill in the garbage (see Figure 5).

In this case, the pressure oil is supplied to the second telescopic cylinder 17 for a period of time set by the timer T1, and the pressure increases.

Therefore, when the pressure reaches a certain set value without the pushing plate 14 rotating to a substantially vertical position due to the resistance from the dust,
Since the pressure switch PS is activated and its contact ps is closed, the current from the power source B continues to energize the solenoid 5OLc and at the same time excites the timer T3 via the relay contact r4 and the pressure switch contact ps. .

When the set time of timer T3 has elapsed, the solenoid 5QLb is energized through its contacts t3 and r5, and as a result, the solenoid switching valve ■2 is switched to the right position, and the electromagnetic switching valve v1 is further switched to the right position. Therefore, the pressure oil from the hydraulic pump P causes the first telescopic cylinder 13 to extend, and the drained oil causes the second telescopic cylinder 17 to extend.

That is, the pushing plate 14 rises while continuing the compression stroke.

Since the upward movement of the push plate 14 reduces the resistance from the dust, the pressure acting on the piston back pressure side oil chamber of the second telescopic cylinder 17 decreases, and the pressure switch PS returns to the open state.

When the pressure switch PS is opened, the timer T3 is demagnetized and its contact t3 is opened, so that the current to the solenoid 5OLc is cut off.

As a result, only the electromagnetic switching valve Vl is returned to the neutral position, and the compression stroke is performed with the expansion of the first telescopic cylinder 13, that is, the filling stroke being interrupted.

In other words, the pushing plate 14 rises slightly and compresses the garbage by changing its location and biting it into pieces (see Figure 6). 14 is rotated to a substantially vertical position, and its tip is compressed.

In this way, by changing the location and compressing, the push plate 1
4 rotates to a substantially vertical position, the push plate 14 is rotated for the time set by the timer T1 or until the electric contact LS4 is reached.
is activated, and then the stuffing process is restarted.

In this case, compression is performed at different locations at intervals set by timer T3.

(Effects) As described above, according to the present invention, garbage that cannot be compressed in a normal garbage processing cycle can be compressed by automatically changing the location, thereby improving the workability of loading work. Can be done.

In addition, since compression is always performed after a set time has elapsed when changing the location, the pressure switch is restricted from connecting and disconnecting, and damage to parts can be prevented.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and Fig. 1 is a cross-sectional side view showing a garbage collection vehicle, Fig. 2 is a hydraulic circuit diagram, Fig. 3 is an electrical circuit diagram, and Fig. 4 is an electrical contact and switch. FIG. 5 is a schematic diagram showing the conventional compressed state, and FIG. 6 is a schematic diagram showing the compressed state of the present invention. 2... Garbage storage box, 5... Garbage input box, 9... Sliding plate, 13... First telescopic cylinder, 14... ...Pushing plate, 17...Second telescopic cylinder, PS...Pressure switch.

Claims (1)

[Claims] (1) A garbage loading box equipped with a garbage loading device consisting of a sliding plate and a pushing plate is connected to the rear opening of the garbage storage box, and the garbage loading device is sequentially operated via an electric-hydraulic control device. In the garbage collection vehicle to be controlled, a pressure switch and a timer linked to the pressure switch are disposed in the electric-hydraulic control device, and when the garbage loading device is in a compression stroke, the pressure switch is operated. A garbage loading device for a garbage collection vehicle, characterized in that garbage can be loaded into a garbage storage box by using both a compression stroke and a stuffing stroke after a time set by a timer has elapsed.