JPH0641922Y2 - Loading control device for garbage trucks - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a loading control device for a refuse collection vehicle, which is configured to increase a space for pushing dust in a final stage of loading the dust in a container.

[Conventional technology]

Generally, a garbage truck equipped with a rotary loading device is known. This dust collecting vehicle has a tailgate at the rear of the dust container, and the tailgate has a built-in loading device including a rotary rotating panel and a swinging pushing panel. When the dust is stored in the dust storage box, the dust thrown into the tailgate is picked up by the rotating panel and pushed in by the pushing panel, but when the dust storage box becomes full of dust. The backflow phenomenon of dust, etc. occurs, and the space for pushing dust is reduced. If a large amount of dust is thrown into the tailgate at such a time, the rotating panel will not rotate normally because the pushing space is small, and the hydraulic circuit for controlling this will be in a relief state. In order to increase the pushing space, the pushing panel can be retracted to the maximum retracted position, but if it is always retracted to that position in the normal cycle, not only the loading time and power will be lost but also the backflow phenomenon of dust will be severe. .

[Problems to be solved by the device]

In order to solve this, conventionally, there has been proposed a technique in which the pushing panel is not always retracted to the maximum retracted position, but the retracting timing is shifted to reduce the repulsion time of dust (Japanese Patent Publication No. 60- 33724 publication). However, this technique merely controls the timing of retreat of the pushing panel and does not positively increase the pushing space.

Therefore, an object of the present invention is to solve the problems of the above-described conventional technology and to reliably increase the pushing space in the final loading stage of dust without causing a loss of loading time or power. An object of the present invention is to provide a loading control device for a garbage truck that is made possible.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention connects a tailgate having a rotary rotary panel and an oscillating push panel to the rear of a dust container, and cooperates with the rotary panel and the push panel. In the loading control device of the garbage collection vehicle, in which the dust thrown into the tailgate is loaded into the dust storage box, the rotating panel is adjusted to scoop up the dust thrown into the tailgate. Rotation control means for rotating, forward control means for advancing the pushing panel to the forward pushing position in order to load the dust collected by the rotating panel into the dust storage box, and temporarily after the dust is loaded and backward. Retraction control means for retracting the push-in panel to the rear standby position in order to wait, and the push-in when a certain load or more is applied when the rotary panel is normally rotated. Is characterized in that a abnormal reverse control means to retract to the maximum retracted position beyond the temporarily the rear standby position panel.

[Action]

According to the present invention, when an excessive load is applied to the rotary panel when the dust is picked up by the rotary panel, the push panel is temporarily retracted beyond the rear standby position to the maximum retracted position, whereby the rotary panel and the push panel are pushed. An area defined by the panel, that is, a space for pushing dust is increased, so that the load on the rotary panel is reduced and the normal rotation of the rotary panel is smoothly performed.

〔Example〕

Hereinafter, an embodiment of a loading control device for a garbage truck according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a side view showing the structure of a garbage truck to which the loading control device is applied. In the drawings, reference numeral 1 denotes a dust container, and a tailgate 3 is pivotally attached to a rear portion of the dust container 1 via a support shaft 2 so that the tailgate 3 can be dumped rearward. A charging port is formed at the rear of the tailgate 3. Further, in the tailgate 3, there are provided a rotating panel 6 which is rotatable around a shaft 5 and a pushing panel 8 which is swingable around a shaft 7, and the rotating panel 6 is pushed by a hydraulic motor 9. The panel 8 is driven by the pushing cylinder 10. The tailgate 3 is driven by the dump cylinder 11. On the other hand, the dust storage box 1 is mounted on the chassis 12 and can be dumped around the support shaft 13. The dust container 1 is driven by a body cylinder 14. Further, the dust container 1 and the tailgate 3 can be tightened by a tightening device 15. The tightening device 15 is driven by a tightening cylinder 16. Then, when the dust is loaded, the dust thrown in through the charging port of the tailgate 3 is scooped up by the rotary panel 6 and pushed into the dust storage box 1 by the pushing panel 8 (Fig. 1). At this time, the dust container 1 and the tailgate 3 are tightened by the tightening device 15. This is to prevent the tailgate 3 from floating backward due to the repulsive force of the dust applied to the dust loading device.

FIG. 2 is a hydraulic circuit diagram of the garbage truck.

T is an oil tank, P is a hydraulic pump, and the pump P is driven by a running engine of the vehicle. The hydraulic pump P is connected to the motor 9 and the cylinders 10 via the switching valves V1 to V5.
11, 14, 16 are connected. SoL1 to SoL10 are each switching valve V
1 to V5 solenoid.

FIG. 3 is an arrangement relational diagram of switches constituting the control device of the refuse collecting vehicle.

No1 is a switch for instructing the backward movement of push panel 8, No2
Is a switch for stopping the backward movement of the push-in panel 8, No3
Is a switch for stopping the rotation operation of the rotary panel 6 and at the same time instructing the forward movement of the pressing panel 8, No4 is a switch for stopping the forward movement of the pressing panel 8, and No5 is a tightening device 1
Switch that detects when 5 is disconnected, No 6 is a tightening device
No.7 is a switch that detects that 15 is hanging, and No7 is a switch that detects the fall of the tailgate.

FIG. 4 is a control circuit diagram of the garbage truck.

Sws is a selection switch connected to the power source, and either the discharge circuit A or the loading circuit B is selected by this.
A body switch 20 is connected to the side of the discharge circuit A, and when this is instructed to rise, SoL1 is energized to raise the dust container 1, and when it is instructed to descend, SoL2 is energized and the dust container 1 is lowered. . Also, a dump switch 21 is connected to the side of the discharge circuit A, and when this is instructed to descend, SoL3 is energized and the tailgate 3 descends, and in the middle of descending, SoL10 is energized via switch No7 and tightened. When the device 15 is held in the opening direction and the lowering of the tailgate 3 is completed, the switch No. 7 is switched, the SoL9 is urged, and the tightening device 15 operates in the closing direction. If the tightening device 15 is disconnected, switch No.
Buzzer Bz sounds via 5, and if it hangs, SoL
2 is urged, and the dust container 1 is urged to the descending side, and its floating is prevented. On the other hand, when the dump switch 21 is instructed to rise, if the tightening device 15 is disengaged, the SoL4 is energized via the switch No5 and the tailgate 3 rises, and if it is engaged, the SoL10 is energized. Then, the tightening device 15 is disengaged, and then the SoL4 is urged to raise the tailgate 3.

The switch No. 6 of the tightening device 15 is connected to the loading circuit B side, and if the tightening device 15 is engaged when loading is instructed, the emergency stop PB5, the retraction PB4 of the pressing panel 8 and the forward movement of the pressing panel 8 are performed. A current flows to the button of the automatic loading PB1 via the buttons of PB3 and the reverse rotation PB2 of the rotary panel 6. Each of these buttons PB1〜
As is clear from FIG. 1, the PB5 is attached to the operation panel 22 at the rear part of the tailgate 3 to facilitate the work at the rear part. When the button PB1 is pressed, the rotary solenoid R / S is energized via the relay CR to accelerate the rotation of the vehicle running engine (not shown). This engine drives a hydraulic pump P (Fig. 4). In addition, a current flows to the switches No1 to No4 through the relay CR, and a series of loading operations starts. When a current flows, SoL7 is energized via the switches No3 and No4, and the rotary panel 6 starts to rotate clockwise in the forward direction. Switch No3 comes off on the way, but switch No4 is bypassed and SoL7 is energized, so rotation continues. Switch No1 comes off after switch No3, and when this comes off, SoL5 is urged through switches No2 and No1 and push panel 8
Starts retreating. Switch No.4 comes off at the start of retreat,
The backward movement of the push-in panel 8 is stopped when the switch No2 is turned on at the backward limit position. When the switch No3 is turned on, the rotation of the rotary panel 6 is stopped by releasing the bias of the SoL7, and when this is turned on, the SoL6 is biased via the switch No4 and the pushing panel 8 starts to move forward. The forward movement of the push-in panel 8 is stopped at the forward limit position when the switch No. 4 is turned on. This completes a series of loading operations.

The discharge circuit A and the loading circuit B described above have substantially the same configurations as those already proposed.

Therefore, according to the present embodiment, between the SoL7 that rotates the rotating panel 6 forward and the SoL5 that retracts the pressing panel 8,
Pressure switch PS and maximum retracted position switch No8 are connected in series. As shown in FIG. 2, this pressure switch PS is connected to the base side pipe line of the pushing cylinder 10, that is, the pipe line for advancing the pushing panel 8, and detects the hydraulic pressure of the base side. There is. Further, the maximum retreat position switch No8, as shown in FIG. 3, is fixed to the fixed portion of the tailgate 3 to detect the maximum retracted position of the pushing panel 8. The pressure switch PS and the maximum retreat position switch No8 constitute retreat control means under abnormal conditions.

Next, the operation of this embodiment will be described.

In FIG. 4, when the selection switch Sws is put in the loading side and the automatic loading button PB1 is pushed, the loading cycle starts as described above on condition that the tightening device 15 is engaged. That is,
First, the current flows to SoL7 and the rotating panel 6 starts forward rotation from the horizontal position shown in FIG. 1 to scoop up the dust and then stops at the same horizontal position. Then, the current flows to SoL6 and the pushing panel 8 moves. It moves forward to the position of switch No4 (forward push position) shown in Fig. 3 and pushes dust into the dust storage box 1, then current flows to SoL5 and push panel 8 moves to position of switch No2 shown in Fig. 3 (rearward). Retreat to the standby position). This completes one loading cycle.

Hereinafter, how dust is stored in the dust storage box 1 will be described.

At the initial stage of loading dust (loading cycle 1 to about 20 times), the dust is stored in the dust storage box 1 substantially parallel to the floor surface.
Partly, a small mountain is formed, but it changes with each loading, and the tip of the dust reaches the front end of the dust storage box 1 about 20 times. During this period, the load applied to the rotary panel 6 and the push-in panel 8 is small, and the rear gate of the dust storage box 1 to the tailgate 3
There is almost no backflow of dust into the interior.

During the middle loading of dust (loading cycle: about 20 to about 40 times), the highest part of the dust reaches the upper end of the dust storage box 1, and the dust storage box 1 is filled with 80% or more of dust. come. At this time, when the pushing panel 8 is retracted, a part of the dust at the rear end of the dust storage box 1 collapses and falls, and flows back into the tailgate 3, but the amount thereof is not large. Although the load on the rotary panel 6 and the push-in panel 8 is also slightly large, the rotary panel 6 can be properly controlled to the normal rotation stop position or the push-in panel 8 to the forward and backward stop positions. Although the dust storage box 1 is almost filled with dust, the dust density has not increased much compared to when the dust is put into the tailgate 3.

At the final loading stage of dust (loading cycle of about 40 to 60 times), dust fills most of the space of the dust storage box 1. When the pushing panel 8 is pushed, the relief pressure is often reached. Since the frictional force and the resistance between the dust container 1 and the dust are significantly increased, the pushing force of the pushing panel 8 prevents the dust from advancing and acts to compress the dust. For this reason, the dust in the rear of the dust storage box 1 is increased to about three times the dust in the front around this time.

As a result, it often happens that the pushing panel 8 cannot reach the normal forward movement position. By repeating the forward movement and the backward movement of the pushing panel 8 by the operation of the operator, the dust is highly compressed and the pushing panel 8 reaches the normal forward position. At this time, a considerable amount of dust flows back from the dust storage box 1 into the tailgate 3, but the rotary panel 6 can still be properly controlled to the forward pushing position.

At the final stage of loading of dust (about 60 to full), the dust that flows back from the dust storage box 1 and the dust that is thrown into the tailgate 3 join together, and as shown in FIG. In the area Z surrounded by the panel 8, both the dust that has flowed back and the dust that has been charged and compressed are at a high density, so an excessive load is applied during the forward rotation of the rotating panel 6 and the forward rotation is prevented. Often, the hydraulic circuit shown in FIG. 2 reaches a relief state.

Therefore, according to the present embodiment, when an excessive load is applied during the forward rotation of the rotary panel 6 and a load for displacing the pushing panel to the reverse side is applied, the pressure switch PS shown in FIG.
Is activated, the normally open contact of the pressure switch PS shown in FIG. 4 is closed, and the forward rotation of the rotary panel 6 is continued, at the same time,
A current flows through SoL5 via the maximum retreat position switch No8, and the push-in panel 8 starts retreating. This backward movement is continued until the pushing panel 8 reaches the maximum backward position switch No8 shown in FIG. 3 (shown by an imaginary line), and when the pushing panel 8 reaches there, the maximum backward position switch No8 is disengaged. The backward movement is automatically stopped.

According to this, even if an excessive load is applied at the time of normal rotation of the rotary panel 6, the push-in panel 8 is automatically retracted to the maximum retracted position switch No8, so that the zone Z to be defined there (see FIG. 3). (Indicated by the imaginary line) expands to increase the so-called dust pushing space. Therefore, according to the present embodiment, the load at the time of the normal rotation of the rotary panel 6 is reduced and the dust is smoothly loaded. Further, the highly compressed dust escapes to the area Z caused by the maximum retraction of the pushing panel 8, so that the rotating panel 6 can reach the forward rotation stop position. When the rotary panel 6 reaches this position, the push panel 8 is repeatedly moved forward and backward, thereby further enabling high compression of dust. As the physical property of this dust, instead of applying the force only in one direction when applying the compressive force, the compressive force is removed for a short time and the compressive force is further applied. By repeatedly advancing and retracting the panel 8, high compression of dust can be further enabled.

When the pushing panel 8 is retracted to the maximum retracted position, a space is formed near the lower end of the pushing panel 8 and the rotation center of the rotary panel 6. However, since the dust in the area Z is highly compressed and solidified, it hardly spills into the tailgate through this space. Also,
Retracting to the maximum retracted position is only during abnormal conditions, and in the normal loading cycle it is retracted to the rear standby position, so it is possible to reduce time and power loss during loading. Also plays.

[Effect of device]

According to the present invention, when an excessive load is applied to the rotary panel and the push-in panel when scooping up dust by the rotary panel, the push-in panel temporarily retracts beyond the rear standby position to the maximum retracted position. As a result, the area defined by the rotary panel and the push-in panel, that is, the dust-pushing space is surely increased, so that the load on the rotary panel is reduced and the dust is smoothly loaded. Also, the retreat to the maximum retreat position is only during abnormal conditions, and in the normal loading cycle it is the retreat to the rear standby position, so there is less time and power loss during loading. Is obtained.

[Brief description of drawings]

FIG. 1 is a side view showing the structure of a garbage truck, FIG. 2 is a hydraulic circuit diagram of the garbage truck, and FIG. 3 is a layout diagram of switches.
FIG. 4 is a control circuit diagram of the loading control device. 1 ... Dust storage box, 3 ... Tailgate, 4 ... Door panel, 6 ... Rotating panel, 8 ... Push panel, 9 ... Hydraulic motor, 10 ... Push cylinder, 11 ... Dump cylinder, 14 ... … Body cylinder, 15 …… tightening device, 16 …… tightening cylinder, 20 …… body switch, 21 …… dump switch, PS …… pressure switch, No8 …… maximum retract position switch, Z …… pushing space.

Claims (1)

[Scope of utility model registration request] 1. A tailgate having a rotary type rotary panel and a swing type push-in panel incorporated therein is connected to the rear of the dust container, and the rotary gate and push-in panel are made to cooperate with each other to form a tailgate inside the tailgate. In the loading control device of the garbage collection vehicle that was loaded with the dust that has been thrown into the dust storage box, a rotation control means for rotating the rotating panel forward to scoop up the dust that has been thrown into the tailgate, Forward control means for advancing the pushing panel to the forward pushing position in order to load the dust collected by the rotating panel into the dust storage box, and the pushing panel for temporarily holding the dust backward after loading the dust. And a backward control means for retracting the rotary panel to the rear standby position, and temporarily pushing the push panel to the rear when a certain load or more is applied when the rotary panel is normally rotated. Loading control device for refuse collection vehicles, characterized in that a abnormal reverse control means to retract to the maximum retracted position beyond the machine position.