JPS6233170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixed position stopping device for a conveyor.

In general, a fixed position stopping device for stopping a conveyor for transporting an automobile body or the like at a predetermined position without applying too much shock and locking it at that position has conventionally been equipped with a shock absorber and an air cylinder. There is a system that sucks in the shock when the transport machine is stopped and locks the transport machine in a predetermined position using an air cylinder. However, such a conventional device requires separate parts for absorbing and locking the shock of the conveyor, which has the problem of increasing the number of parts and increasing costs.

This invention was made in view of the problems of the conventional ones.The tip of the piston rod of the air cylinder comes into contact with the locking part of the conveyor, and the air is transferred through the piston rod and the piston by receiving the moving force of the conveyor. A stopper portion for compressing the air in the rear chamber of the cylinder is provided, and a restriction is provided in the piping communicating with the rear chamber of the air cylinder for restricting the discharge of the air compressed in the rear chamber from the rear chamber. A lever having a pawl portion that engages with the locking portion is pivotally supported, so that when the stopper portion is moved in the backward direction of the piston rod by being pressed by the locking portion, the pawl portion engages with the locking portion. A guide for guiding the lever and a switch for detecting the engagement are provided, and a detection signal for detecting that the claw portion of the switch engages with the locking portion is used to control the air supply to the air cylinder to the rear chamber. The purpose of the present invention is to provide a device for stopping a transport machine in a fixed position, which is capable of absorbing the shock caused by contact with the transport machine and locking it by providing a switching valve that switches the supply from the supply to the front chamber. There is.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a base fixed to a beam of a building, etc. On the top surface of the base 1, an air cylinder 2 is mounted in front, and a mounting bolt 2c is mounted in the rear. Tightened and fixed. A piston 3a is fitted into the air cylinder 2 so as to be slidable in the left-right direction in the figure, and a stopper part 4 is screwed and fixed to the tip of the piston rod 3 fixed to the piston 3a. At the tip of the stopper part 4, there is a contact part 4 that comes into contact with the locking part 5a of the conveyor 5.
a is formed, and two parallel to the stopper part 4 are formed.
The upper end portion 6e of the lever 6, which is made of a plate-like member, is pivotally supported by a connecting pin 6a. Also, the lever 6
A claw portion 6b that engages with the locking portion 5a of the conveyor 5 is formed at the right end portion of the lever 6, and a lower end portion 6b of the lever 6 is formed.
A guide pin 6c having a guide portion 6f is penetrated and fixed to d, and the guide portion 6f provided on the guide pin 6c is inserted into a guide hole 16 bored in the front part of the base 1 (on the right side in the figure). engaged. The guide hole 16 consists of an inclined portion 16a extending from the upper right end of the base 1 to the lower left, and a horizontal portion 16b extending horizontally to the left, and the width of the hole is the diameter of the guide portion 6f. It is formed slightly larger.

Also, the horizontal portion 16b of the guide hole 16 of the base 1
A switch mounting base 1a is provided below,
A limit switch 7 is tightened and fixed on the upper surface of the mounting base 1a (on the front side in the drawing) with a set bolt 7c, and the limit switch 7 has a switch lever 7a and a roller 7b at its tip that is connected to the inclined portion 16a of the guide hole 16. and the horizontal portion 16b.

FIG. 2 shows a system diagram of piping for supplying air to the air cylinder 2 of this embodiment, and in the figure, 8
is a solenoid valve 8 for push side operation that is turned on by a conveyor drive signal.
a and a pull-side operating solenoid valve 8b that is turned on by the ON signal of the limit switch 7. When the push-side operating solenoid valve 8a is turned on, air from the air source 9 is passed through the push-side passage 9a to the air cylinder. Likewise, the pull-side operating solenoid valve 8b guides air from the air source 9 to the right chamber 2b through the pull-side passage 9b.

Further, the push side passage 9a is provided with a regulator valve 10 for setting the pressure of air supplied to the left chamber 2a of the air cylinder 2 to a desired level, and a throttle 11 for air discharged from the air cylinder 2. Further, the throttle 11 is provided with a bypass passage 12 having a check valve 12a.
A is for allowing the air supplied to the left chamber 2a of the air cylinder 2 to flow as is, and conversely, blocking the air being discharged from the left chamber 2a. Note that 13 is a pressure gauge that indicates the air pressure in the left ventricle 2a. Further, the pull side passage 9b is provided with a throttle 14 for air discharged from the right chamber 2b of the air cylinder 2, and the throttle 14
A bypass passage 15 having a check valve 15a is provided in the air cylinder 2.
The air supplied to the right ventricle 2b is allowed to flow as is, while the air discharged from the right ventricle 2b is blocked.

Next, the operation will be explained.

When the conveyor 5 is being conveyed, that is, when the conveyor 5 is to the right of the position indicated by the solid line in FIG. , the air source 9 communicates with the push side passage 9a,
Air from the air source 9 is supplied to the left chamber 2a of the air cylinder 2 through the push passage 9a and the bypass passage 12, and this air pushes the piston 3a to the right to position the piston rod 3 at its forward position. In addition, the lower end 6d of the lever 6 is positioned at the upper end of the inclined portion 16a of the guide hole 16. Note that the air supplied to the left chamber 2a of the air cylinder 2 is set at a predetermined pressure by a regulator valve 10.

Also, the conveyor 5 is at its stop position S (see Figure 1).
When it approaches the stopper 4, its driving force is cut off to stop it, but the transporter 5 continues to move due to inertia, and its locking part 5a comes into contact with the contact part 4a of the stopper part 4, causing the stopper to stop. The section 4 is moved to the left together with the piston rod 3. Then lever 6
While its upper end 6e moves to the left, its lower end 6d moves to the lower left along the slope 16a of the guide hole 16, and as a result, the lever 6 is moved by the movement of the upper and lower ends 6e and 6d. When the lower end portion 6d moves to the position indicated by the dashed line in the same figure, the claw portion 6b engages the conveyor 5.
It engages with the locking part 5a of. Further, the air in the left chamber 2a of the air cylinder 2 is pushed to the left by the piston 3a as the piston rod 3 moves leftward, but in this case, its discharge is restricted by the throttle 11, and as a result, the air is The air in the left ventricle 2a is supplied to the piston 3a.
This acts to absorb the force pushing the transporter 5 to the left, thereby absorbing the shock when the transporter 5 stops.

At this time, when the lower end 6d of the lever 6 moves to near the lower end of the inclined part 16a of the guide hole 16,
The switch lever 7a of the limit switch 7 is rotated counterclockwise in FIG. 1 as its roller 7b is pushed by the lower end 6d, and the limit switch 7 is turned on when the lower end 6d moves to the position shown by the dashed line in the figure. do. Then, in response to the ON signal of the limit switch 7, the solenoid valve 8 for operating the pull side of the switching valve 8
b is turned on, the switching valve 8 is in the state shown in FIG. 3, and the air source 9 communicates with the pull side passage 9b.
Air is supplied to the right chamber 2b of the air cylinder 2, and the piston rod 3 moves to the left. Further, in this case, since the locking portion 5a of the carrier 5 is engaged with the claw portion 6b of the lever 6, the carrier 5 moves to the left together with the piston rod 3, and the carrier 5 is held locked at the stop position S. Ru.

In addition, when releasing the lock at the stop position S in order to transport the transport machine 5 again, the switching valve 8 is turned on from the state shown in FIG. 2, air is supplied to the left chamber 2a of the air cylinder 2, the piston rod 3 moves to the right end, and the lower end 6d of the lever 6 is aligned with the guide hole 1.
As a result, the engagement between the claw portion 6b and the locking portion 5a of the conveyor 5 is released.

In the fixed position stopping device for the conveyor machine of this embodiment, which is configured and operated in this manner, the shock when the conveyor machine 5 is stopped is absorbed by the air cylinder 2, and the air cylinder 2 absorbs the shock when the conveyor machine 5 is stopped. Since the carrier 5 is pulled in to a predetermined position and locked at that position, there is no need to separately provide a shock absorber, and the number of parts can be reduced.
Furthermore, the accuracy of the stopping position can be improved.

In the above embodiment, the limit switch 7 is operated in accordance with the movement of the lower end portion 6d of the lever 6, but the switch 7 may be provided so as to be able to detect the engagement of the claw portion 6b with the locking portion 5a. For example, it may be activated in response to movement of the stopper portion 4 of the piston rod 3. Furthermore, in the above embodiment, the guide hole 16 was bored in the base 1 as a guide.
The guide may be provided so that the claw portion 6b and the locking portion 5a engage with each other as the piston rod 3 moves, and does not necessarily have to be a long hole.

As described above, according to the fixed position stopping device for a carrier according to the present invention, the tip of the piston rod of the air cylinder comes into contact with the locking part of the carrier, and the air is moved through the piston rod and the piston by receiving the moving force of the carrier. A stopper portion for compressing the air in the rear chamber of the cylinder is provided, and a constriction for restricting the discharge of air compressed in the rear chamber from the rear chamber is provided in the piping communicating with the rear chamber of the air cylinder, and the piston rod A lever having a pawl portion that engages with the locking portion is pivotally supported, and when the locking portion moves the stopper portion in the backward direction of the piston rod, the lever is configured such that the pawl portion engages with the locking portion. A guide for guiding the air cylinder and a switch for detecting the engagement are provided, and a detection signal for detecting that the pawl portion of the switch engages with the locking portion causes the air supply to the air cylinder to be supplied to the rear chamber. Since a switching valve is installed to switch the supply from the feeder to the front chamber, a single air cylinder can absorb the shock when the conveyor is stopped and lock it in place, eliminating the need for a shock absorber and reducing the number of parts. This has the effect of reducing manufacturing costs and improving the accuracy of the stop position of the conveyor.

[Brief explanation of the drawing]

Fig. 1 is a side view of a fixed position stop device for a conveyor according to an embodiment of the present invention, and Fig. 2 is an air piping system diagram of the air cylinder of the above embodiment. The system diagram, FIG. 3, is a system diagram of only the vicinity of the switching valve when the pull-side operating solenoid valve is turned on. 1...Base, 2...Air cylinder, 3...Piston rod, 4...Stopper section, 5...Transporter,
5a...Locking part, 6...Lever, 6b...Claw part,
7...Switch (limit switch), 8...Switching valve, 16...Guide (guide hole).

Claims (1)

[Claims] 1. An air cylinder provided on the base with its axis substantially aligned with the extension line in the moving direction of the carrier, and an air cylinder provided at the tip of the piston rod of the air cylinder and in contact with the locking part of the carrier. A stopper part that compresses the air in the rear chamber of the air cylinder through the piston rod and the piston in response to the moving force of the conveyor, and a stopper part that compresses the air in the rear chamber of the air cylinder, which is installed in a pipe communicating with the rear chamber of the air cylinder. a lever that is pivotally supported by the piston rod of the air cylinder and has a pawl portion that engages with a locking portion of the conveyor, and the locking portion of the conveyor is connected to the stopper portion; a guide for guiding the sliding and rotation of the lever so that when the piston rod is moved in the backward direction of the piston rod, the pawl engages with the locking portion; and the pawl portion engages with the locking portion. A switch that operates when the switch is engaged, and a signal that is provided on the piping that supplies air to the front and rear chambers of the air cylinder and that detects that the claw part of the switch has engaged with the locking part starts supplying air. A fixed position stop device for a conveyor, comprising a switching valve that switches the supply from the rear chamber to the front chamber.