JP2573214Y2 - Work 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 work transfer device for holding a work such as a plate material and transferring the work between, for example, a processing machine and an accumulation shelf.

[0002]

2. Description of the Related Art Although a work clamp of a conventional work transfer apparatus is not shown, one end of the work is placed between a lower jaw for placing one end of the work and a lower jaw by a piston rod of a clamp cylinder. The work transfer device is configured to move the work clamp horizontally in a horizontal manner along a transfer guide horizontally provided between a processing machine and an accumulation shelf, for example. It is. The stacking shelf is formed so that the vertical position of the table surface can be adjusted up and down.

[0003] A workpiece that has been processed by the processing machine is clamped at one end by a workpiece clamp, transported along a transport guide, and transferred onto a table on an accumulation shelf. When this transfer is completed, the table on the stacking shelf moves slightly downward, the upper jaw moves upward by the operation of the clamp cylinder of the work clamp, the clamping is released, and the work clamp returns to the processing machine along the transport guide. The work that has been moved and the clamping has been released is accumulated on the table.

[0004]

After the transfer, the upper jaw is lifted to release the clamping, and when the work clamp is moved to remove the work from the lower jaw, one end of the work is placed above the lower jaw. , The other end of the work is on the upper surface of the already integrated work on the table, and the lower movement of the table causes one end of the work to be higher than the other end. When the work clamp is disengaged, the frictional force between one end of the work and the lower jaw is sufficiently smaller than the frictional force between the other end of the work and the table, so that the work is placed on the table. Will be left behind.

However, when the frictional force between one end of the work and the lower jaw is not sufficiently smaller than the frictional force between the other end of the work and the table, the work is removed as the work clamp is removed. It moves toward the processing machine and disturbs the alignment and accumulation of the work on the table. In particular, when the work is short, the frictional force between the one end and the lower jaw becomes a value close to the frictional force between the other end of the work and the table, and the movement tends to occur.

The present invention has been proposed in view of such a problem of the conventional work transfer device, and provides a work transfer device that is devised so as to surely prevent the work from crimping when the work clamp is removed and moved. It is intended to be.

[0007]

In order to solve the above-mentioned problems, the present invention provides a method in which a lower jaw on which one end of a work is placed and a lower jaw are held between the lower jaw by vertical movement. A work clamp having an upper jaw and a work clamp configured to perform a horizontal transfer operation along a transfer guide, wherein a lower jaw retreat mechanism for retreating to remove the lower jaw from one end of the placed work And a work stopper portion for preventing the work from being displaced during the retreating movement by an abutting action is configured in the work transfer device provided in the work clamp.

[0008]

When the upper jaw is moved upward to release the clamping by the work clamp and the lower jaw retracting mechanism is operated to retract and move the lower jaw, the work on this lower jaw comes into contact with the work stopper portion. Movement of the workpiece during the evacuation movement is prevented. As a result, the work
When the movement of the work clamp is completed, the work clamp is aligned and accumulated at a predetermined position.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the work clamp 1, and FIG.
FIG. 3 is a side view of FIG. 1, FIG. 3 is a punch press 3 as a processing machine, an accumulation shelf 5 for accumulating works W, a punch press 3, and a work clamp 1 for conveying the work W on the accumulation shelf 5; FIG. 4 is an overall front view of the work processing system showing FIG.
FIG. 2 is a longitudinal sectional view of FIG.

Referring to FIG. 3, the punch press 3 includes an upper turret 11, a lower turret 13 provided with a number of punches 7, a die 9, and a striker 15.

On the front side of the punch press 3, a center table 19 fixed to the apparatus frame 17 is provided. On the left and right sides of the center table 19, a front side table 21 and a rear side table 23 are provided. Is provided so as to be movable in the front and back directions on the paper surface of FIG. The front side table 21 and the rear side table 23 are integrally connected to a carriage base (not shown) provided in the left-right direction of FIG.
The front side table 21 is driven by a motor (not shown).
3 together with the rear side table 23.

A work clamp (not shown) for holding the work W is mounted on the carriage base by a motor so as to be movable in the left-right direction in FIG.

The exemplary stacking shelf 5 provided next to the front side table 21 supports the table 27 by a pair of X-shaped links 25, and the vertical position of the table 27 can be adjusted vertically by a fluid pressure cylinder (not shown). The structure is as follows.

A slat conveyor 29 is provided which pivots around the collecting shelf 5 in a rectangular shape when viewed from the front.

The slat conveyor 29 includes a frame 3
1 and a plurality of sprockets 33, which are pivotally supported,
A pair of endless chains 35 are wound around in the front and back directions of the paper surface of FIG. A plurality of pipe rollers 39 are rotatably attached to the chain 35 over a part of the length of the chain 35 rotated by a motor 37.

A transport guide 41 having, for example, an I-shaped cross section is provided on the frame 31 so as to be parallel to the rotation surface of the chain 35.
4 and a clamp loader 47 provided with a pinion 45 that meshes with a rack 43 formed on the transport guide 41 as shown in FIG.
Is installed. As shown in FIG. 2, a plurality of the work clamps 1 are arranged in the width direction of the work W (the direction of the front and back of the paper in FIG. 3).

The illustrated work clamp 1 is shown in FIGS.
And as shown in FIG.
, A clamp frame 53 attached by a fulcrum bolt 51 provided horizontally to a clamp attachment body 49 below, an upper jaw 57 provided on the clamp frame 53 so as to be vertically movable by a clamp cylinder 55, and a lower jaw retracting mechanism 59. 1 and a lower jaw 61 provided on the clamp frame 53 so as to be movable in the left-right direction of FIG.

As shown in FIG. 4, the fulcrum bolt 51 mounts the base 63 of the clamp frame 53, and the guide shaft 69 erected on the base 63 is inserted into the hole 67 of the spring seat 65 provided on the upper part of the clamp mounting body 49. Further, a spring 73 is interposed between the spring seat 65 and the guide shaft bottom plate 71. This spring 7
3 pushes the guide shaft bottom plate 71 downward, so that the horizontal plate 75
(Provided on the clamp frame 53) is brought into contact with the upper part of the clamp mounting body 49, so that the clamp frame 5
3 is held in a horizontal position.

The lower portion of the clamp frame 53 in the illustrated example
As shown in FIG. 2, an opening is formed near the lower portion of the clamp cylinder 55 and a vertical section is formed in a gate shape, and other than this opened portion (opening 53a) is formed in a box-shaped section. The lower jaw retreating mechanism 59 is housed.

The lower jaw retracting mechanism 59 illustrated in FIG.
The piston is guided by the retracting cylinder 77, the piston 79 closely fitted to the retracting cylinder 77, the piston cover 81 closing the inlet side of the retracting cylinder 77, the rod guide 83 fitted inside the piston cover 81, and the rod guide 83. Piston rod 85 and a smooth portion 85 of the piston rod 85
and a key groove 87 which engages with the key rod a to prevent the piston rod 85 from rotating around the axis.

A lower jaw 61, which is sufficiently wider than the lateral width of the clamp frame 53, is attached to the distal end of the piston rod 85 with a bolt 89.

The upper jaw 57 is provided with a clamp cylinder 55
Are attached to the lower end of the piston rod 91 by bolts 93.

The work W whose one end is placed on the lower jaw 61 is clamped by the lower jaw 57 and the lower jaw 61 which have been moved downward, and the clamped work W is released by the upward movement of the upper jaw 57. When the lower jaw 61 retreats from below the upper jaw 57 to the left in FIG. 1, the work stopper 95 that contacts the left end of the work W to prevent the work W from moving leftward is opened by the opening of the clamp frame 53. Part 5
It is formed by a notch 97 provided in 3a.

As shown in FIG. 4, the pinion 45 of the clamp loader 47 includes a sprocket wheel 101 connected to a motor 99, a sprocket wheel 103 connected to the pinion 45, and sprocket wheels 101 and 103.
And driven by the chain 105 wound therearound.

The piston rod 9 of the clamp cylinder 55
1 moves downward by the supply of the pressure oil from the oil passage 107 in FIG. 1 and moves upward by the supply of the pressure oil from the oil passage 109. The piston rod 85 of the retraction cylinder 77 is connected to the oil passage in FIG. It moves to the right by the supply of pressure oil from 111 and retreats to the left by the supply of pressure oil from oil passage 113.

In the above arrangement, the work W is carried into the punch press 3 by the carrying device (not shown), the carried work W is grasped by the work clamp (not shown) of the punch press 3, and the front side table 21 or the rear side table 23 is held. The carriage base is moved and positioned at a predetermined position, and processing is performed using a predetermined punch 7 and die 9. The work clamp 1 approaches the finished work W, and the lower jaw 61 is attached to the lower surface of the left end of the work W.
Enters the piston rod 9 of the clamp cylinder 55.
1 moves downward, and the upper jaw 57 and the lower jaw 61 pinch the left end of the work W.

The clamp frame 53 holding the left end of the work W tends to hang around the fulcrum bolt 51 due to the weight of the work W.
At a position where the horizontal plate 75 of the clamp frame 53 comes into contact with the upper part of the clamp mounting body 49 by pressing the clamp frame 1 downward, the clamp frame 47 is held in a horizontal posture.

The slat conveyor 29 is stopped at a position where the pipe rollers 39, 39,... Are located above the table 27 of the accumulation shelf 5, and the motor 99 of the clamp loader 47 is driven to accumulate the work clamp 1. When transported to the left toward the shelf 5, the right end of the work W moves from the front side table 21 of the punch press 3 onto the slat conveyor 29, and moves on the pipe rollers 39, 39,.

When the work W reaches the position directly above the table 27, the slat conveyor 29 moves the pipe roller 3
.. Are pivotally moved to positions off the table 27 of the stacking shelf 5, and a fluid pressure cylinder (not shown) slightly moves the table 27 to support the work W over the entire surface.

When this support is completed, the table 27 moves slightly downward, the piston rod 91 of the clamp cylinder 55 and the lower jaw 61 move upward, and the work W is released.
Next, when the piston 79 of the lower jaw retreat mechanism 59 moves to the left in FIG. 1 and retreats the lower jaw 61 from below the upper jaw 57, the left end of the work W riding on the lower jaw 61 becomes Since the workpiece W comes into contact with the stopper portion 95, the work W is prevented from moving along the retreating movement by the work stopper portion 95. Thereby, the workpieces W are aligned and accumulated at predetermined positions on the table 27.

As described above, the works W are aligned and accumulated at predetermined positions when the movement of the work clamp is completed, and are a work transfer device that is sufficiently effective for an automatic work processing system.

The work stopper 95 and the lower jaw retracting mechanism 59 which can be used in the above embodiment are not limited to those shown in the illustrated example, but may have other structures having the same mechanism as described above.

[0033]

[Effect of the Invention] Since the work transfer device according to the present invention is configured as described above, the upper jaw is moved upward to release the clamping by the work clamp, and the lower jaw retracting mechanism is operated to retract the lower jaw. When the work moves, the work on the lower jaw comes into contact with the work stopper portion, so that the work is prevented from crimping during the retreating movement. As a result, the workpieces are aligned and accumulated at predetermined positions when the movement of the workpiece clamp is completed, and serve as an effective workpiece transfer device for the automatic workpiece processing system.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a work clamp in a work transfer device of the present invention.

FIG. 2 is a side view of FIG.

3 is an overall front view of a work processing system using the work transfer device of FIG. 1;

FIG. 4 is a longitudinal sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work clamp 41 Transport guide 57 Upper jaw 61 Lower jaw 59 Lower jaw retraction mechanism 95 Work stopper W Work

Claims (1)

(57) [Scope of request for utility model registration] 1. A work clamp having a lower jaw on which one end of a work is placed and an upper jaw for holding the one end of the work between the lower jaw and the lower jaw by moving up and down. In a work transfer device configured to perform a horizontal transfer operation, a lower jaw retreat mechanism for retreating and removing the lower jaw from one end of the placed work, and a contact movement of the work during the retreat movement by the contact action. A work transfer device, wherein a work stopper for blocking is provided on a work clamp.