JPS63208402A - Safety device 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 safety device for a garbage collection vehicle.

(Prior art) Conventionally, in a garbage collection vehicle, when carrying out maintenance and inspection of the garbage processing device housed in the garbage storage box, a telescopic cylinder is operated to tilt the input box backward, and then the garbage disposal box is tilted backwards. Safety rods housed on both sides of the end protrude rearward to hold the garbage disposal box in a tilted state.

(Problem to be Solved by the Invention) Generally, the telescopic sill that tilts the garbage disposal box is a double-acting type, and if the garbage disposal box is held in a tilted state by a safety rod, the garbage disposal box may be lowered due to an erroneous operation. If you try to do this, in addition to the weight of the garbage disposal box, the compressive force from the telescopic cylinder will be applied in the direction that compresses the safety rod, so the strength of the safety rod will need to be increased that much, which will result in a disadvantageous structure from a safety point of view. It had become.

(Means for Solving the Problem) The present invention has been made in view of the above problem, and includes a center bypass type electromagnetic control valve between the telescoping cylinder and the hydraulic pump, and also connected to an oil chamber on one side of the telescoping cylinder. An electromagnetic on-off valve is installed in each of the connected circuits, so that when the garbage disposal box is lowered, it is lowered by its own weight and no extra load is placed on the safety rod.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a garbage collection vehicle, and a garbage storage box 3 is placed on a vehicle frame 2. A garbage disposal box 4 is pivotally mounted above the bin 4 and is connected to the bin 4 so as to be tiltable rearward.

The base end of a telescoping cylinder 6 is pivotally attached to both edges of the rear end of the garbage storage box 3 by a pin 7, and the tip of the telescoping cylinder 6 is attached to a lever pivotally supported by a pin 8 to the side of the garbage input box 4. It is pivotally connected to one end of 9 with a pin 10.

The other end of the lever 9 is connected to the upper end of the connection s11 and the pin 12.
The connection s11 is extended downward and its lower end is pivotally connected to the base end of the lashing wind 14 by a pin 13,
Further, the lashing wind 14 is pivotally attached to a bracket fixed to the lower part of the garbage input box 4 with a pin 15 so as to be freely swingable. On the other hand, at the tip of the lashing wind 14, a hanger 16 that engages with the lashing wind 14 is fixed to the bottom of the garbage storage box 3. 16 and the like constitute a securing mechanism 17.

Further, on the lower surface of the lever 9 to which the telescopic cylinder 6 is connected, a stopper 18 that protrudes from the side of the garbage input box 4 is fixed at a slight distance. is configured to abut against the stopper 18.

In addition, the lower ends of safety rods 19 and 19 are pivotally attached to both edges of the rear end of the garbage storage box 3 by pins 20 and 20, and the storage positions are along the rear edge of the garbage storage box 3 as shown by solid lines in FIG. and a working position where the garbage input box 4 is held in a tilted position as shown by the imaginary line in FIG.

Next, the hydraulic circuit will be explained with reference to FIG.

P is a hydraulic pump, T is an oil reservoir, Vl is a center bypass type electromagnetic control valve that controls the telescopic cylinder 6, V2.
V3 is disposed in a circuit that communicates with the piston back pressure side oil chamber of the telescopic cylinder 6, and is normally biased to a position that blocks the flow of pressure oil from the telescopic cylinder and allows the flow of pressure oil to the hydraulic cylinder. With electromagnetic on-off valves, Vl, V2. V3 has solenoids 5OLa and 5OLb for valve spool operation, respectively.
,S.

It has Lk, SOI, and j'. Next, the electric circuit will be explained. Figure 3 is an electrical circuit diagram showing a part of the garbage collection vehicle, where B is a power source such as a battery, Bz is a buzzer, and S is a power source such as a battery.
W9 is an operation switch for tilting the garbage input box 4, and LS6 is an electric contact that operates when the garbage input box 4 is connected to the garbage storage box 3.

Next, the effect will be explained. The garbage input box 4 shown by the solid line in FIG.
Insert 9 upwards. As a result, current flows to the buzzer BZ to issue an alarm, and at the same time flows to the solenoid 5OLa, the electromagnetic control valve v1 is switched to the upper position, and the telescopic cylinder 6 is extended. When the telescopic cylinder 6 expands,
First, the lower surface of the lever 9 moves until it comes into contact with the stopper 18, and as a result, the lever 9 rotates clockwise around the pin 8 as shown in FIG. 1, and the connecting rod 11 is pulled up. 14 is rotated counterclockwise and removed from the hanger 16. When the telescopic cylinder 6 is further extended, the garbage input box 4 starts tilting counterclockwise around the axis 5 via the stopper 18, and when the garbage input box 4 is released from the connection with the garbage storage box 3. Electrical contact LS6 is in the open position.

Finally, the rear end of the garbage storage box 3 of the garbage input box 4 can be opened as shown by the chain line in FIG.

After this, when the garbage disposal box 4 is held in a tilted position for maintenance and inspection of the garbage disposal device (not shown) installed in the garbage disposal box 4, the safety rod 19 with the storage position number is moved to the working position. After extending it, you can work as appropriate. When the work is completed, the safety rod 19 is stored in the storage position, and then the operating switch SW9 is placed in the lower position. In this state, the electrical contact LS6 is in the open position, so the solenoid 5
QLb is not energized and the solenoid control valve v1 is held at the neutral position. However, the current is solenoid 5OLk
, 5OLj' respectively and flow to the electromagnetic on-off valve ■2, v3
Since this is switched to the lower position, the flow of pressure oil from the telescopic cylinder is allowed, and the garbage disposal box 4 descends under its own weight. At this time, even if the garbage disposal box 4 is lowered by this operation with the safety s19 in the working state, only the weight of the garbage disposal box 4 acts on the safety rod 19.

On the other hand, when the garbage input box 4 returns to the connected state where it is in contact with the garbage storage box 3, the electric contacts I and S6 are switched to the downward position, the current flows to the solenoid 5OLb, and the electromagnetic control valve v1 is switched to the downward position. Change. Therefore, the telescopic cylinder 6 is forcibly contracted, and the lever 9 to which the tip of the telescopic cylinder 6 is connected rotates in a direction away from the stopper 18.

Therefore, the lashing mechanism 17 is actuated to cause the lashing wind 14 to engage the hook 16. After that, when the operation switch SW9 is returned to the neutral position, the power to the solenoids 5QLk and 5OLJ is cut off, so that the electromagnetic on-off valve V2. V3 is respectively switched to the upper position, the hydraulic pressure of the telescopic cylinder 6 is sealed, the telescopic cylinder 6 is fixed in the contracted position, and the engagement between the lashing wind 14 and the hook 16 is maintained.

In this embodiment, the lashing wind 14 is linked to the telescopic cylinder 6 via the lashing mechanism 17, but the fourth
As shown in the figure, the lashing air 24 can also be operated via a separately provided lashing cylinder 25. That is, the lashing mechanism 17 shown in FIG. Just connect them.

Here, in FIG. 5, v4 is an electromagnetic control valve that controls the lashing cylinder 25, and the spool operating solenoid SQL
j, SOLm, and is arranged in parallel to the electromagnetic control valve ■1.

In this embodiment, when the operation switch SW9 is operated to the lower position, the garbage input box 4 descends under its own weight until the garbage input box 4 is connected to the garbage storage box 3. after that,
If electric contact LS6 switches, solenoid SQL j
As a result of energizing, the lashing cylinder 25 is contracted and the lashing air 24 is engaged with the hook 26.

In addition, when the garbage input box is tilted, solenoid 5OL
A and SOLm are simultaneously energized to switch the electromagnetic control valves Vl and V4, respectively, but the lashing cylinder 25, which has a lighter load, operates first. Specifically, after the lashing wind 24 is detached from the hanger 26, the garbage input box 4 is tilted.

(Effects of the Invention) As explained above, in the present invention, when the garbage disposal box is lowered, it is lowered by its own weight, and no extra compressive force other than the own weight of the disposal box is applied to the safety rod. Even if the garbage disposal box is lowered with the rod extended to the operating position, the safety rod and the garbage disposal box will not be damaged. In addition, the safety rod is stronger than the conventional one because it acts only by its own weight.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially omitted side view of a garbage collection vehicle, FIG. 2 is a hydraulic circuit diagram, FIG. 3 is an electric circuit diagram, and FIG. Fifth. FIG. 6 shows another embodiment, of which FIG. 4 is a partial side view of the garbage collection vehicle, FIG. 5 is its hydraulic circuit diagram, and FIG. 6 is its electric circuit diagram. 1... Garbage collection vehicle, 2... Car frame, 3.
... Garbage storage box, 4 ... Garbage input box, 6
... Telescopic cylinder, 17 ... Lagging mechanism, 19 ... Safety rod, vl ... Solenoid control valve, V2, V3 ... Solenoid on-off valve.

Claims (4)

[Claims] (1) A garbage collection vehicle in which a garbage input box is rotatably attached to the rear upper part of the garbage storage box, and a telescoping cylinder is provided between the input box and the garbage storage box, the telescoping cylinder and a hydraulic pump. A center bypass type electromagnetic control valve is disposed in between, and an electromagnetic on-off valve normally energized to a position that prevents contraction of the telescoping cylinder and allows expansion thereof is installed in a circuit communicating with the oil chamber on one side of the telescoping cylinder. and an operation switch for controlling the tilting of the garbage disposal box, and when the garbage disposal box is lowered via the tilting switch, a switching-controlled electromagnetic on-off valve and an electromagnetic control valve in a neutral position are provided. A safety device for a garbage collection vehicle, characterized in that the vehicle is lowered by its own weight. (2) An electric contact is provided between the garbage input box and the garbage storage box to detect the connection state of the garbage input box, and a securing device for the garbage input box with respect to the garbage storage box is activated via the electric contact. A safety device for a garbage collection vehicle according to claim 1. (3) The safety device for a garbage collection vehicle according to claim 2, wherein the lashing device is mechanically interlocked with a telescopic cylinder. (4) The safety device for a garbage collection vehicle according to claim 2, wherein the lashing device is interlocked with a lashing cylinder.