JP2543818Y2 - Reciprocating transfer device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating transfer device used, for example, for transferring an electrolytic polishing jig from an attaching / detaching position to an electrolytic tank or a washing tank.

[0002]

2. Description of the Related Art When a reciprocating member such as the above-mentioned electrolytic polishing jig is reciprocated along a linear path, the reciprocating member is slidably supported on a linear rail, and the reciprocating member is connected to a chain or a cylinder. It is common to adopt a method of moving by driving means such as. However, these methods require expensive positioning means in order to stop the reciprocating member at an accurate position, and there is a problem that manufacturing costs are increased. Further, in order to perform an emergency stop when an excessive external force is applied during the transportation, a safety device different from the above-described positioning means is required, and there is a problem that the manufacturing cost is further increased.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, can stop the reciprocating member at an accurate position without using expensive positioning means, and receives an unreasonable external force. In this case, the present invention has been made to provide a reciprocating transfer device which can easily and reliably perform an emergency stop and has a relatively low manufacturing cost.

[0004]

SUMMARY OF THE INVENTION A reciprocating transfer device according to the present invention, which has been made to solve the above-mentioned problems, has a fixed sprocket and a slide in the direction of the linear rail along a linear rail slidably supporting a reciprocating member. A movable sprocket is provided, a chain for driving the reciprocating member is wound between the two sprockets, and a resilient means for resiliently moving the movable sprocket away from the fixed sprocket, and a moving amount of the movable sprocket exceeding a predetermined value. And a sensor for detecting the stop of the apparatus and stopping the apparatus.

[0005]

The reciprocating transfer device of the present invention reciprocates a reciprocating member along a linear rail by a reciprocating member driving chain wound between a fixed sprocket and a movable sprocket. The sprocket is repelled by the repelling means in a direction away from the fixed sprocket. Therefore, if a stopper is provided together with the position sensor at the stop position, the inertia of the reciprocating member or the like is absorbed by the movable sprocket sliding against the resilient means, and accurate positioning by the stopper is possible. Also, even if it receives an excessive external force, the movable sprocket will slide against the resilient means,
The sensor can detect that the amount of movement has exceeded the allowable value and stop the device. As described above, according to the present invention, it is possible to improve stop position accuracy and safety by relatively simple means.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the illustrated embodiments. The drawings show examples in which the present invention is used for reciprocating the jig for electrolytic polishing, and FIG. 1 is a front view,
FIG. 2 is a side view, and FIG. 3 is a plan view.

In these figures, 1 is a frame, 2 is a straight rail installed on the frame 1, and 3 is a saddle slidably supported on the straight rail 2. The part of the slide ball bearing 3a that supports the saddle 3 and the linear rail 2 use a commercially available linear motion guide. The saddle 3 is provided with a holding device 5 that can be moved up and down by a cylinder 4, and the holding device 5 holds a jig 6 for electrolytic polishing.
In this specification, the reciprocating member is a general term for a portion that slides on the linear rail 2.

A fixed sprocket 7 and a movable sprocket 8 are provided above the straight rail 2. The fixed sprocket 7 is of a driven side fixed at a position set by an adjusting screw 9, while the movable sprocket 8 is supported on a slide base 10 slidably supported at the end of the linear rail 2, Motor 11
Can be driven. A chain 12 for driving a reciprocating member is wound between the fixed sprocket 7 and the movable sprocket 8, and a part of the chain 12 is fixed to the saddle 3, so that the chain 12 reciprocates the saddle 3 and the like. The member can reciprocate on the linear rail 2.

The slide base 10 on which the movable sprocket 8 is mounted is constantly repelled in a direction away from the fixed sprocket 7 by resilient means 13 such as a coil spring as shown in FIGS. I have. Therefore, if the resilient force of the resilient means 13 is made larger than the tension of the chain 12 during normal operation by the adjusting screw 13a, the movable sprocket 8 remains at the position shown in the figure defined by the stopper 14. When the tension of the chain 12 increases due to the cause, the slide base 10 on which the movable sprocket 8 is mounted moves toward the fixed sprocket 7 against the elastic force of the elastic means 13.

A dog 15 is hung below the slide base 10, and a sensor 16 such as a proximity switch for detecting that the dog 15 has approached the frame 1 is attached. Thus, when the slide base 10 moves to the fixed sprocket 7 side beyond the allowable value as described above, the sensor 16 detects this and stops the brake motor 11 to stop the apparatus.

Reference numeral 17 denotes a proximity switch for stopping the saddle 3 at each position of the attachment / detachment station 18, the electrolytic cell 19 and the washing tank. In addition, stoppers 20 and 21 are provided in the electrolytic cell 19 and the attachment / detachment station 18 where positioning accuracy is required, respectively, so that the saddle 3 is forcibly stopped.

In the apparatus of the embodiment thus constructed, the holding device 5 holds the electrolytic polishing jig 6 at the attachment / detachment station 18 and drives the brake motor 11 to drive the saddle 3 through the chain 12. Is run along the linear rail 2 and stopped in the electrolytic bath 19 and the washing bath to perform necessary processing.

When the reciprocating member is reciprocated between the respective positions as described above, the proximity switch 17 detects the approach of the saddle 3 and stops the brake motor 11. After that, the saddle 3 may still slightly move due to inertia. However, in this embodiment, the saddle 3 is forcibly stopped at an accurate position by the end faces of the saddle 3 hitting the stoppers 20 and 21. The overrun due to the operation delay of the brake motor 11 and the like is absorbed by the movable sprocket 8 moving toward the fixed sprocket 7 against the resilient force of the resilient means 13. For this reason, the stopper 20,
Even if the saddle 3 is forcibly stopped by 21, no mechanical unreasonableness occurs, and simple and accurate positioning can be performed.

Further, since the apparatus of this embodiment is a semi-automatic machine, it is necessary for an operator to put his / her hand inside the jig 6 to attach and detach the electrolytic polishing jig 6. In this case, a force is applied to the chain 12, and the tension increases. Also in this case, the movable sprocket 8 moves toward the fixed sprocket 7 against the resilient force of the resilient means 13, and when the sensor 16 detects that the amount of movement has exceeded a predetermined value, the brake motor 11 To stop. Therefore, the saddle 3 can be stopped at an arbitrary position in an emergency, and injuries can be prevented because the resilient means 13 buffers the impact.

[0015]

As described in detail above, the reciprocating transfer device of the present invention can stop the reciprocating member at an accurate position without using expensive positioning means. Further, the reciprocating transfer device of the present invention can reliably stop the reciprocating member in an emergency when receiving an unreasonable external force. Therefore, the present invention has a very large practical value as a reciprocating transfer device whose manufacturing cost is relatively inexpensive as compared with the conventional one.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a plan view showing an embodiment of the present invention.

[Explanation of symbols]

 2 Straight rail 7 Fixed sprocket 8 Movable sprocket 12 Chain 13 Resilient means 16 Sensor

Claims (1)

(57) [Scope of request for utility model registration] A fixed sprocket (7) and a movable sprocket (8) slidable in the direction of the linear rail (2) are provided along a linear rail (2) slidably supporting a reciprocating member. A chain (12) for driving a reciprocating member is wound between the sprockets (7) and (8), and a spring means (13) for springing the movable sprocket (8) away from the fixed sprocket (7); And a sensor (16) for detecting when the amount of movement of the sprocket (8) exceeds a predetermined value and stopping the apparatus, and a sensor (16).