JPH0726030Y2 - Automatic unclamping device for charging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automatic unclamping device for automatically clamping and unclamping a billet in a billet charging device for supplying a material to a forging press or the like.

<Prior art> In a hot forging line such as a crankshaft, for automation and FMS (flexible production system),
Billets are automatically conveyed and automatically supplied. Forging presses use a billet charging device that clamps the conveyed billets and supplies the billets into the press.

In such a billet charging device, an automatic unclamping device that automatically unclamps the clamped billet at the loading position in the press is required.The conventional automatic unclamping device opens and closes a pair of clamp claws with an air cylinder. It was supposed to be a method.

<Problems to be Solved by this Invention> The unclamping device using the air cylinder as described above has the following problems.

(I) Since the solenoid valve and the proximity switch for checking the operating position are required, it is necessary to dispose the clamp claw portion for moving the pipe and the wiring, which causes various inconveniences. Especially in the case of a billet for hot forging, there is a problem with heat.

(Ii) At the stroke end of the charging device, it takes some time to unclamp due to the operation delay of the air cylinder, etc., and the speed cannot be increased.

(Iii) The structure becomes complicated and the number of parts increases.

(Iv) A large space is required at the tip of the charging device.

The present invention has been made to solve the above-mentioned problems, and an object thereof is an automatic unclamping device for a charging device, which has a relatively simple and compact structure and can perform unclamping quickly and easily. To provide.

<Means for Solving the Problems> The present invention relates to an automatic unclamping device of a charging device for clamping and transferring a material W and unclamping it at a loading position 10 such as a 0-step tray as shown in FIG. ,
A pair of clamp claws 1 capable of sandwiching the material W from both sides are supported so as to be openable and closable in the material transfer direction, and are urged in the clamp claw closing direction, and an operating piece is provided at the tip of the clamp claw 1A on the rear side in the material transfer direction. Is projected integrally with the clamp claw 1A, the operating piece is brought into contact with the stopper piece fixed at the carry-in position 10, and then the stroke is further moved to move the clamp claw 1A integral with the operating piece. By pushing and opening, this opening movement is interlocked with the opening movement of the clamp claw 1B on the front side in the material transfer direction.

It is preferable that the clamp claw 1A is formed longer than the clamp claw 1B, and the tip portion of the clamp claw 1A is an operating piece provided with a cam 11 (see FIG. 1).

<Operation> The material W is clamped by the biasing force in the closing direction of the clamp claw, and at the position before the stroke end of the charging device, one tip of the clamp claw is fixed by the stopper piece such as the rising piece of the saucer that is fixed at the carry-in position. If it is blocked and the claw unit is further moved in this state, one clamp claw will open and the other clamp claw will open and move in the opposite direction, and both clamp claws will open simultaneously. As a result, the material W falls into the saucer or the like.

<Example> This is an example applied to a hot forging press. As shown in FIG. 1, a billet charging device is installed in front of a press (not shown), and a billet charging device is installed at the tip of the billet charging device. After the billet W is clamped by the automatic unclamping device according to the present invention and moved by a predetermined stroke,
It can be supplied to the 0-step saucer 10 of the press.

The rack 7 of the billet charging device is movably supported by guides and rollers (not shown) toward the press with its teeth facing upward, and reciprocates with a predetermined stroke by a servo motor, speed reducer, pinion, etc. not shown. Move.

The claw unit U is attached to the lower surface of the tip of the rack 7 via the support bracket 8. The claw unit U includes a clamp claw 1 (1A, 1B), a rotary pin 2 (2A, 2B).
B), lever 3 (3A, 3B), compression coil spring 4, connecting pin 5, link 6 (6A, 6B) and the like. The clamp claw 1 is a billet W orthogonal to the rack 7 as shown in FIG.
Are paired in the billet supply direction so that they can be clamped from both sides, and their bases are attached to the projecting pieces 9 via the rotating pin 2 so that they can be opened and closed in the billet supply direction.
Lever 3 whose base is attached to the rotating pin 2 and projects upward
Then, the compression coil spring 4 disposed between the tips of the levers urges the clamp claws in the closing direction.
Further, the tip end of the clamp claw 1A on the rack 7 side can be brought into contact with the rising piece 10a of the tray 10, and one clamp claw 1A, 1B is connected by the connecting pin 5 which connects the links 6A, 6B. The opening movement of 1A causes the other clamp claw 1B to move in an interlocking manner. A cam 1 is provided on the contact surface of the clamp claw 1A with respect to the rising piece 10a of the 0-step saucer serving as a stopper piece.
1 is provided, and the curved surface of this cam allows the clamp claw 1A to smoothly move in a pressing manner.

As shown in FIG. 2, the rotating pins 2A and 2B are rotatably supported by the central portions thereof by fixed sleeves 12A and 12B fixed to the pair of projecting pieces 9.
The rotary sleeve 14 is fixed to both ends of the rotary key 14 with the keys 13, and the clamp claw 1, the lever 3 and the link 6 are fixed to the rotary sleeve 14.
To fix. As shown in FIG. 3, on the clamp claw 1B side, a link 6B is arranged between the clamp claw 1B and the lever 3B, and on the clamp claw 1A side, the clamp claw 1A and the link 6A are arranged to match the claw positions. It is an integral member.

The connecting pin 5 is located in the concave groove (see FIG. 1) of the projecting piece 9 and is rotatably inserted and held in the link 6B. (See FIG. 1), the displacement caused by the swing of the clamp claw can be absorbed. Further, the compression coil spring 4 is attached to the upper end portion of the lever 3 via the protruding portion 16 so that the spring 4 is not released.

Furthermore, a V-shaped locking groove 17 is formed on the side of the clamp claw 1A so that the billet W does not drop during transfer. Further, a contact metal 18 along the longitudinal direction of the billet is attached to the contact portion with the billet to prevent the billet from being scratched.

The above-described structure operates as follows.

(I) The billet W is clamped by the clamp claws 1 by waiting while the clamp claws 1 are positioned on the transport path and raising the billet W that has been transported.

(Ii) The rack 7 moves toward the press by starting the servo motor. The clamp pawl 1 is biased in the closing direction by the compression coil spring 4, and the billet W does not drop.

(Iii) When the pawl unit U comes to a position before the stroke end, the cam 11 contacts the rising piece 10a of the tray 10, and when the pawl unit U further moves to the stroke end, the clamp 1A urges the compression coil spring 4. Defeat and move in the opening direction. The connecting pin 5 and the link 6 interlock with the opening movement of the clamp claw 1A to open the clamp claw 1B in the opposite direction. Since the clamp claws 1A and 1B are opened and moved at the same time, the billet W falls and enters the tray 10.

(Iv) The servomotor reversely rotates, the rack 7 moves in the reverse direction, the clamp claw 1 returns to the closed state, and one stroke is completed.

The billet W on the tray 10 is transferred to the first step, the second step, etc. of the press by an appropriate transfer means, and is subjected to rough processing, finish forging and the like.

As a means for moving the clamp claw 1 in the billet supply direction, it is better to decelerate at the stroke end. Therefore, it is preferable to control the servo motor by a computer or a programmable sequencer by a rack and pinion method using a servo motor.

The hot forging press has been described above, but it goes without saying that the present invention can be applied to other material charging devices as well.

<Effects of the Invention> As described above, the automatic unclamping device according to the present invention is configured such that one of the clamp claws biased in the closing direction is brought into contact with the stopper piece fixed at the carry-in position, and then the claw unit is further provided. The stroke is moved to push it open, and the other clamp claw is opened and moved in the opposite direction in conjunction with the opening movement of the one clamp claw, so that the following effects are achieved.

(I) Since the air cylinder is mechanically opened and closed instead of the air cylinder, no piping or wiring is required, and troubles due to heat particularly in the hot forging billet can be eliminated.

(Ii) The billet can be unclamped quickly and reliably at the stroke end of the charging device without time delay, and the speed can be increased.

(Iii) The structure is simple, the number of parts can be reduced, and the cost can be reduced.

(Iv) A compact structure can be achieved and space can be saved.

[Brief description of drawings]

FIG. 1 is a side view showing an automatic unclamping device according to the present invention, FIGS. 2 and 3 are a sectional view taken along the line II of FIG. 1 and a sectional view taken along the line III of FIG. 1 ... Clamp claw, 2 ... Rotating pin, 3 ... Lever, 4
...... Compression coil spring, 5 ...... connecting pin, 6 …… link,
7: rack, 8: support bracket, 9: protruding piece,
10 …… 0 process saucer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Katsuyuki Nakagawa 5-2 Sokai-cho, Niihama-shi, Ehime Sumitomo Heavy Industries, Ltd. Niihama Works (56) Reference JP 60-85886 (JP, A) Actual Opened 50-22275 (JP, U) Actually opened 50-91278 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An automatic unclamping device of a charging device for clamping and transferring material and unclamping it at a carry-in position, wherein a pair of clamp claws capable of holding the material from both sides are supported so as to be openable and closable in the material transfer direction. At the same time, the stopper is biased in the closing direction of the clamp claw, and the operating piece is projected integrally with the clamp claw at the tip of the clamp claw on the rear side in the material transfer direction, and the operating piece is fixed at the carry-in position. After abutting against the piece, the stroke is further moved to push open the clamp claw integrated with the operating piece, and this opening movement is interlocked with the opening movement of the clamp claw on the front side in the material transfer direction. An automatic unclamping device for the charging device.