JPH0358964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for controlling the limit position of an operating body.

(Prior Art) Conventionally, as shown in Japanese Patent Laid-Open No. 54-150859, in a limit position control device for an actuating body, a connecting link is slidably supported by a support member fixed to the actuating body, and the upper part of the connecting link is and the limit position of the actuating body, in which the support member contacts a stop piece fixed to the lower part, and by pulling this connecting link, the detector (switching valve) is switched and the actuating body is stopped at the limit position. Control devices are generally well known.

(Problems to be Solved by the Invention) However, in this conventional limit position control device, the connecting link is constantly sliding, so there is a problem with durability, and if galling occurs between the detector and the support member, the detector There was a problem when the system malfunctioned.

(Means for solving the problem) A garbage input box is connected to the rear opening of the garbage storage box. In the garbage collection vehicle, the garbage pushing device is equipped with a garbage pushing device pivotably supported by a detector, and the garbage pushing device is sequentially operated by switching the detector to push the garbage thrown into the garbage disposal box into the garbage storage box. A piece to be stopped is provided in the upper part, and a connecting link in which a stopper piece that comes into contact with the piece to be stopped is fixed to the upper and lower parts of the garbage disposal box is slidably held in a fixed position by a support member and a coil spring. , when an arm for switching the detector is swingably connected to one end of the connecting link, the actuating body slides up and down, and the stopper piece comes into contact with the stopper piece near the upper or lower limit of the actuating body. The detector is characterized in that the connecting link is actuated only to switch the detector.

(Operation) When the garbage pushing device is started with the operating body in the state shown in Fig. 1 at its upper limit, the second telescopic cylinder contracts and the pushing plate rotates to the rear limit position.
The telescopic cylinder contracts and moves the sliding plate and the pushing plate downward, crushing the thrown-in garbage and pulling the connecting link downward against the bias of the coil spring, so that the piece to be stopped stops near the lower end. When it comes into contact with the piece, the cam fixed to the arm at the lower end of the connecting link switches one of the detectors, the second telescoping cylinder extends, the pushing plate rotates forward, and the crushed garbage is secondarily compressed. Then, the first telescoping cylinder is extended and the reverse operation is performed, and finally the detector is switched and the sliding plate is stopped at the upper limit position.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, reference numeral 1 denotes a garbage storage box mounted on the frame of a garbage collection vehicle, and a garbage input box 2 is tiltably connected to a rear opening 3 of the garbage storage box 1 by a pivot 4. ing. The garbage input box 2 is equipped with a garbage pushing device A, and a storage chamber 6 is provided below the garbage input box 2, and an input port 5 is opened at the rear. The collected garbage is compressed, crushed and pushed into the garbage storage box 1.

The garbage pushing device A includes a sliding plate 8 as an operating body that can slide from the upper front part to the rear lower part of the garbage input box 2, and a pushing plate 10 that is pivoted 11 at the lower end of the sliding plate 8. It is equipped.

The sliding plate 8 is formed to cover approximately the full width of the garbage input box 2. Guide grooves 7 are provided on the inner surfaces of both side walls of the garbage disposal box 2, slanting from the upper part of the front part to the lower part of the rear part, and both side edges of the sliding plate 8 are fitted into these left and right guide grooves 7. Tsute sliding plate 8
is slidable along the guide groove. A pivot (not shown) is supported on the upper surface of the sliding plate 8 via a bracket, and both ends of this pivot are inserted into the guide groove 7 formed in the side wall of the garbage disposal box 2 and extend outward. It stands out. At both ends of this axis, there are first
The rod end of the telescopic cylinder 9 is connected to this first
The pivot shaft moves in the guide groove 7 by the telescopic operation of the telescopic cylinder 9, and the sliding plate 8 slides up and down along the guide groove 7 accordingly.

Like the sliding plate 8, the pushing plate 10 is formed to cover approximately the full width of the garbage input box 2, and as shown in FIG. ing. A second telescopic cylinder 13 is provided between the protrusion of the pushing plate 10 and the pivot on the upper surface of the sliding plate 8.
are connected to each other, and the pushing plate 10 is configured to rotate back and forth around the pivot 11 as the second telescopic cylinder 13 expands and contracts.

Next, the limit position control device of the actuating body according to the present invention will be explained. Side walls 2a are provided on both sides of the garbage disposal box 2, and a support member 16 is fixed to one of the both sides walls 2a. A connecting link 19 having stopper pieces 17 and 18 fixed to the upper and lower portions of the member 16 is fitted and supported so as to be slidable in the axial direction. On the other hand, the connecting link 19
At the lower end of the bracket 20 is fixed to the side wall 2a.
The tip of an arm 22 which is supported by a shaft 21 is connected to the arm 22, and the arm 22 can be swung by sliding the connecting link 19 in the axial direction.

Further, detectors (limit switches) 24 and 25 whose contacts are switched by a cam 23 fixed to the arm 22 are mounted on the bracket 20 at an appropriate interval.

On the other hand, a stopped piece 26 that comes into contact with the stopper pieces 17 and 18 is protruded at an appropriate position on the back surface of the sliding plate 8, and when the sliding plate 8 reaches the vicinity of the upper end, the stopped piece 26 contacts the stopper piece 17. When the sliding plate 8 reaches the vicinity of the lower end, the stopper piece 26 contacts the stopper piece 18 and pulls the connecting link 19 downward, causing the above-mentioned detection. This is to switch between the devices 24 and 25.
Incidentally, reference numeral 27 denotes a stop fixed approximately in the middle of the connecting link 19, and coil springs 28 and 29 are stretched between the support member 16 and the stop 27 and between the upper stopper piece 17 and the support member 16, respectively. The connecting link 19 is urged by the coil springs 28 and 29 to the position indicated by the two-dot chain line in FIG. 2, except when the sliding plate 8 reaches its limit position.

Next, the operation of the present invention will be explained.

The pushing plate 10 swings backward (starts to compress and push the garbage)
As a result, the sliding plate 8 slides downward (primary garbage compression), then the pushing plate 10 swings forward (secondary garbage compression), and then the sliding plate 8 slides upward (dust accumulation The garbage pushing device A operates sequentially to compress and push the garbage thrown in from the input port 5 of the garbage input box 2 into the garbage storage box 1.

By the way, to explain the case of setting the limit position of the sliding plate 8 as an operating body, first the sliding plate 8 slides along the tilting direction to the upper limit position,
At the same time, the stopper piece 26 protruding from the back surface of the sliding plate 8 comes into contact with the stopper piece 17 in the middle, and at the same time pulls the connecting link 19 upward along the axial direction while resisting the bias of the coil spring 27. . As the connecting link 19 moves, the arm 22 connected to the lower end of the connecting link 19 swings clockwise, and as a result, the cam 23 fixed to the arm 22 comes into contact with the detector 24. to switch the contact. Then, the electromagnetic switching valve (not shown) connected to the detector 24 is switched, the extension operation of the first telescopic cylinder 9 is stopped, and at the same time the sliding plate 8 is stopped at the upper limit position.

Next, by appropriately operating the electromagnetic switching valve, the first telescopic cylinder 9 starts to contract, and at the same time, the sliding plate 8 starts sliding downward along the inclination direction, and the sliding plate 8 reaches the upper limit. When reaching the vicinity of the lower end slightly below the position, the connecting link 19 moves to the position indicated by the two-dot chain line in FIG.

Further, by contracting the first telescoping cylinder 9, the sliding plate 8 is slid downward along the inclination direction, and when the sliding plate 8 reaches the vicinity of the lower end, a protruding part is formed on the back surface of the sliding plate 8. The stopped piece 26 comes into contact with the stopper piece 18, and pulls the connecting link 19 downward along the axial direction while resisting the bias of the coil spring 28. Then, as described above, the arm 22 swings counterclockwise, and the contact point of the detector 25 is switched by the cam 23 of the arm 22 (dotted chain point in FIG. 2). Then, the contraction operation of the first telescopic cylinder 9 is stopped by the action of the electromagnetic switching valve connected to the detector 25, and at the same time, the sliding plate 8
stops at the lower limit position.

In the embodiments of the present invention, the operating body is explained as a sliding plate of a garbage collection vehicle, but the operating body may also be a pushing plate, and is of course limited to the sliding plate or pushing plate of a garbage collection vehicle. isn't it.

(Effects of the Invention) As described above, according to the present invention, the amount of sliding of the connecting link with respect to the supporting member is significantly smaller than that of the conventional one, and as a result, wear of the supporting member and the connecting link is significantly prevented, resulting in durability. Furthermore, it is possible to prevent galling between the connecting link and the support member, which could result in the detector being accidentally operated.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic side view of a garbage collection vehicle, and FIG. 2 is a side view of the main parts thereof. 2a... Side wall, 8... Sliding liquid, 16... Support member, 17, 18... Stopper piece, 19... Connection link, 22... Arm, 23... Cam, 24, 2
5...detector, 26...piece to be stopped.

Claims (1)

[Claims] 1 A garbage input box is connected to the rear opening of the garbage storage box, and the garbage input box includes an actuating body that slides from the upper front part to the rear lower part, and a garbage pushing device with a pushing plate pivoted at the lower end of the operating body. A garbage collection vehicle is equipped with a garbage pushing device that sequentially operates by switching a detector to push garbage thrown into a garbage disposal box into a garbage storage box, and a piece to be stopped is provided on the upper part of the operating body, On the other hand, in the garbage disposal box, a connecting link in which a stopper piece that comes into contact with the piece to be stopped is fixed to the upper and lower parts is slidably held in a fixed position by a support member and a coil spring, and one end of the connecting link is attached to the detecting member. An arm for switching between devices is swingably connected, and an actuating body slides up and down, and the connecting link is actuated and detected only when the stopped piece comes into contact with the stopper piece near the upper or lower limit of the actuating body. 1. A limit position control device for an operating body, characterized in that the device is configured to switch between actuators.