JPS6033724B2 - Garbage pushing device in garbage collection vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a garbage pushing device for a garbage truck, which allows garbage to be smoothly loaded into a garbage storage box of the garbage truck.

The garbage storage box mounted on the garbage collection vehicle is combined with a garbage processing frame that is equipped with a garbage pushing device that plays the role of a slug gate to open and close the rear door and pushes the garbage thrown into the storage box. .

A general-purpose example of a garbage pushing device for this type of garbage collection vehicle is a hydraulically driven pusher plate that swings back and forth in the front and back directions, and a hydraulic motor that works in cooperation with this pusher plate below the pusher plate. Some devices are equipped with a rotating rotary plate, and operate sequentially so that the garbage thrown into the processing frame is scraped up by the rotation of the rotary plate, and then pushed into the storage box by the forward movement of the pushing plate.

By the way, when the garbage pushing device finishes pushing the garbage, the pushing plate stops at the most forward position and supports the garbage that has just been pushed, and the rotary plate first scrapes up the garbage, causing the pushing plate to move forward. It is placed in a state where it is stopped in a substantially horizontal position.

Next, in the garbage pushing operation starting from this state, the rotary plate first starts rotating upward, and when this rotates a predetermined angle to the rear of the pushing plate, the pushing plate starts moving backward.
The rotary plate gradually begins to rotate downward, scoops up dirt, and continues to rotate until it reaches its stop position.

During this time, the pushing plate is inverted to the last retreating layer, and after stopping at the dirt scraping position, the rotating plate enters forward motion to push the dirt on the rotating plate into the storage box. In the above operation, when the rotary plate rotates to the rear of the pushing plate and the pushing plate moves backward,
The garbage that had been supported by the push plate in the storage box loses its support and some of it falls into the processing frame.
This is mixed into the new dust scraped up by the rotary plate. The more debris that falls into this processing frame, the larger the amount of debris accumulated near the front of the push plate, the more dense the ash, the more the debris that has weak mutual bonding strength such as pins, and cannot be piled up. .

Furthermore, if the pushing plate starts to move backward as soon as the rotary plate rotates, the time period for which the space formed below is open becomes longer, and the amount of debris that falls down increases.

The present invention was invented in view of the above-mentioned points, and it skillfully guides the garbage pushed into the storage box by the pushing plate to reduce the amount of garbage that accumulates near the front surface of the pushing plate, and also reduces the amount of garbage that accumulates near the front surface of the pushing plate while the pushing device is in operation. An object of the present invention is to provide a suitable garbage pushing device for a garbage collection vehicle, which reduces the amount of garbage falling from the storage box toward the processing frame by shortening as much as possible the time when the garbage support disappears in the storage box by the pushing plate. It is.

Embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a chassis of a garbage collection vehicle, and 2 denotes a garbage storage box mounted on the chassis.The rear end base is pivotally connected to the chassis with a pin 3, and a hydraulic cylinder 4 performs a dumping action as appropriate.

Reference numeral 5 denotes a garbage processing frame whose top part is pivotally connected to the storage box 2 by a pin 6 so that the rear entrance of the storage box 2 can be freely opened and closed, and has a garbage inlet 7 and a processing chamber 8 at the bottom of the frame.

Reference numeral 9 denotes a garbage pushing device built into the processing frame 5, which consists of a pushing plate 10 whose upper base end is supported by the processing frame 5 and swings back and forth in the front and rear directions, and a processing chamber 8 below this pushing plate 10. A rotating plate 11 whose proximal end is pivotally supported by the processing frame 5, and a proximal end pivotally attached to a bracket 12 which protrudes above the pivot pin 6 of the processing frame 5 as a drive means for the pushing plate 10, and a rod 14 at the tip thereof. Hydraulic cylinder 1 pivoted on an extension arm 15 protruding from the base of the pushing plate
3, as a driving means for the rotary plate 11, disposed on both sides of the processing frame 5 and connected to the pivot of the rotary plate 11 via an interlocking mechanism,
The main component is two hydraulic motors 16 that operate simultaneously.

The hydraulic cylinder 13 is used both to operate the push plate 10 and to open and close the processing frame 5, and therefore has a stroke necessary to open and close the processing frame 5 in addition to the normal stroke for swinging the push plate 10. . Next, reference numeral 17 denotes a dust return prevention plate provided on the processing frame 5 at a position above the front surface of the push-in plate 10, and the upper end of this plate is approximately perpendicular to the point where the processing frame 5 connects to the storage box 2. Continuing from the standing wall part 18, a sloped wall part 19 is formed which is bent rearward and has a gentle slope and whose lower end is located near the pivot point of the push plate, and the bent part where both wall parts 18 and 19 intersect is When the processing frame 5 is in a normal state, it is made to project forward to the extent that it slightly protrudes into the storage box 2.

The hydraulic cylinders 4, 13 and the hydraulic motor 16 are incorporated into the hydraulic circuit shown in FIG.
, V2, and V3 to operate by supplying and discharging pressure oil from the hydraulic pump 20.

Each of these switching valves V, V2, and V3 has a pair of solenoids that operate electrically.
Solenoids SOL-c and SOL-d are incorporated in the switching valve V2, and solenoids SOL-e and SOL-f are incorporated in the switching valve V3. Further, these solenoids SOL-a to SOL-f are incorporated into the sequence circuit shown in FIG. 3, and are connected to the operation of the pushing device 9, and have electrical contacts that operate sequentially in a timed manner in the arrangement shown in FIG. B-1 to 5 and each operation switch S
Power is activated by operating W-1 to W-10. In the figure, reference numeral 21 is a stopper for fixing the push plate 10 at its most retracted position when the processing frame 5 is opened and closed, and after the push plate 10 is fixed, the processing frame 5 is opened by the contraction operation of the hydraulic cylinder 13. be done. 22 is the fastening means of the processing frame 5;
Released when opening/closing.

V4 is a switching valve that operates when the processing frame 5 is closed, and has a solenoid SOL-g and a processing frame 5 opening/closing operation switch SW-.
9 is turned on to the closing side, it is energized and the hydraulic cylinder 13 is activated.
This is a safety valve that throttles the return oil cross-section and slows down the closing movement of the processing frame 5.

The present invention is constructed as described above, and its operation will be explained next. In Fig. 3, when the discharge selector switch SW-1 is turned on to the thinning side, the continuous/single-acting switch SW-2 is selectively turned on to the continuous side or the single-acting side, and the operation switch SW-3 is opened. , the switching valve V3 is switched by energizing the solenoid SOL-e, hydraulic pressure from the hydraulic pump 20 is supplied to the hydraulic motor 16, and the rotating plate 11 starts rotating.
Ru.

When the rotary plate 11 rotates a predetermined angle (approximately 180 degrees), the electrical contact is switched to -3 by the cam 23 attached to the rotary plate shaft, and the rotary plate l1 is positioned just downward as shown in FIG. Solenoid SO near the entrance to room 8
By energizing L-d, the switching valve V2 is switched and the pushing plate 10 starts to move backward. The rotary plate 11 continues to rotate and gradually enters the processing chamber 8, scrapes up the garbage that has been put into the processing chamber 8 from the input port 7, and when it reaches a substantially horizontal position toward the storage box 2. Stop. During this time, the push plate 10
is temporarily stopped at the reversal limit position due to backward movement, and at this position, after the rotary plate stops, it shifts to forward movement, and the rotary plate 1
The garbage above 1 is pushed into the storage box 2, and one cycle of the pushing operation is completed here. At this time, if the changeover switch SW-2 is set to the continuous side, the pushing operation cycle described above is repeated, and if it is set to the single acting side, the push plate 10 reaches the forwardmost point and stops its operation. However, in the present invention, in the dust pushing operation cycle, the time from when the rotary plate 11 starts rotating to when the pushing plate 10 starts moving backward is set so that the rotary plate 11 pushes the dust inside the processing chamber 8. The raking operation is started, and the setting is set as long as possible to the extent that the dirt being raked up does not interfere with the operation of the pushing plate 10 on the way back, and the time for the pushing plate 10 to support the garbage in the storage box 2 and disappear is set. This is a shortened version. On the other hand, as the loading of garbage into the storage box 2 progresses, the amount of garbage near the front of the push-in plate increases, and the upper layer comes into contact with the inclined wall 19 of the garbage return prevention plate 7. The garbage is pushed out along the slope into the storage box 2 by receiving the pushing up force from the lower layer of garbage accompanying the pushing operation of the pushing plate 10, thereby limiting the amount of accumulated dirt near the front surface of the pushing plate.

Therefore, according to the present invention, by setting the operation start time of the rotary plate and the pushing plate of the garbage pushing device, it is possible to shorten the time during which the pushing plate supports the garbage loaded in the storage box and disappear, and to reduce the amount of accumulated dust near the front surface of the pushing plate. Since the stacking height is reduced, the amount of garbage falling from the storage box toward the processing frame when the garbage pushing device is activated is reduced, and the garbage pushing work can be carried out smoothly and efficiently. In addition, regardless of the type of garbage, even garbage with weak mutual bonding force such as ash and bottles can be safely loaded, and the driving power can be used effectively, and furthermore, it can be used as a means for driving the rotating plate. Since two hydraulic motors are used and have sufficient capacity, even if the garbage from the storage box collapses onto the processing frame side, there will be no problem in scraping up the garbage with the rotary plate, and the garbage including this will not be affected. This has the effect of making it possible to press the

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic diagram of the rear part of a garbage collection vehicle, Fig. 2 is a hydraulic circuit diagram, Fig. 3 is an electrical circuit diagram, Fig. 4 is a layout diagram of electrical contacts, and Fig. FIG. 5 is a side view showing the reversal start position of the pushing plate. '1...Chassis, 2.
...Garbage storage box, 3...Pin, 4...
・Hydraulic cylinder, 5... Garbage processing frame, 6...
... Pin, 7... Dust inlet, 8... Processing chamber, 9... Dust pushing device, 10... Pushing plate, 11...
... Rotating plate, 12... Bracket, 13...
Hydraulic cylinder, 14...Rod, 15...
...Extension arm, 16...Hydraulic motor, 17.
...Dust return prevention plate, 18... Vertical wall section, 19...
... Slanted wall part, 20 ... Hydraulic pump, 21
...stopper, 22...lashing means, 23...cam. Figure 4 Figure 1 Figure 2 Figure 3 Figure 5

Claims (1)

[Scope of Claims] 1. A garbage processing frame equipped with a garbage pushing device consisting of a pushing plate and a rotary plate is pivotally mounted to the rear opening of the garbage storage box, and the garbage thrown into the processing frame is transferred to the pushing plate, In a garbage collection vehicle that is pushed into a garbage storage box by sequential operation of rotary plates, a dogleg-shaped garbage return prevention plate is fixed to the garbage processing frame so as to protrude inward of the garbage storage box, and further 1. A garbage pushing device for a garbage collection vehicle, characterized in that the backward movement of the pushing plate is started in the latter half of the forward rotation of the rotary plate. 2. A garbage pushing device in a garbage collection vehicle according to claim 1, wherein the hydraulic motors for driving the rotary plate are arranged on both sides of the garbage processing frame and configured to operate simultaneously. .