JPH07242359A - Plate material carrying-out clamp device and plate material clamping method using the same - Google Patents

Abstract

PURPOSE:To increase workability and also prevent the work breakage during the work conveyance by holding a work surely by a clamp device and conveying it even if the work is warped during the conveyance of the work. CONSTITUTION:In a plate carrying clamp device 29 in which one end of a work machined by a plate material work machine is clamped and the work is carried, a carrying clamp main body 43 which is free to move vertically relative to a movable loader 21 is provided, and a work retaining member 69 movable in vertical direction is installed at the top of the carrying clamp main body 43. Then a clamp lower jaw 61 which is free to move forward and backward relative to the position of the work retaining member 69 is provided at the bottom of the carrying clamp main body 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material unloading and clamping device and a plate material clamping method using the device.

[0002]

2. Description of the Related Art Conventionally, when a work (product) processed by a plate material processing apparatus such as a turret punch press is carried out, the end edge of the product is gripped and carried out. That is, it is general that a clamp device provided in a loader that is movable in the front-rear direction along a rail grips the product, moves to the stacking position, and then releases and stacks the product. At this time, the lower clamp jaw for clamping the product is integrally provided on the main body of the clamp device.

As an example, for example, Japanese Utility Model Publication No. 58-4
No. 8069 and Japanese Utility Model Publication No. 63-38038 are known, and in each case, a lower clamp jaw is integrally provided on the main body of the clamp device, and this fixed lower clamp jaw and a swingable plate. The work is clamped by a pressing member and the work is conveyed.

[0004]

By the way, in the above-described conventional plate material gripping device, a work piece sometimes warps during processing by a plate material processing machine or the like, and the work piece thus warped is clamped. When attempting to carry out the work, there is a problem that the lower clamp jaw cannot be clamped even if the work is moved in from the side because the lower jaw is integrated with the main body of the clamp device.

An object of the present invention is to reliably clamp and convey a work even when the work is warped during the work conveyance, thereby improving workability and preventing the work from breaking during the work conveyance. Another object of the present invention is to provide a plate material clamping method using the device.

[0006]

In order to achieve the above object, the plate material unloading and clamping device of the present invention is a plate material unloading and clamping device that clamps and conveys one end of a work piece processed by a plate material processing machine, and moves it. A unloading clamp body that can move up and down with respect to a free loader is provided, and a vertically movable work holding member is provided on the unloading clamp body, and a clamp lower jaw that can move back and forth with respect to the position of this work holding member is provided. It is characterized in that it is provided below the carry-out clamp body.

In the plate material unloading clamp device, it is desirable that the unloading clamp body is tiltably provided with respect to an upper and lower slider provided on the loader so as to be vertically movable.

Further, according to the plate material clamping method of the present invention, when the work processed by the plate material processing machine is clamped and conveyed by the plate material unloading clamp device, the clamp lower jaw provided on the unloading clamp body is pushed from one end of the work. Evacuate,
After lowering the carry-out clamp main body from a state where it does not hang on the work and the work holding member is located within one end of the work, and the upper surface of the clamp lower jaw is positioned lower than the back surface of the work, the lower clamp jaw is moved to the work. The work holding member is lowered and the work is clamped by the clamp lower jaw and the work holding member.

[0009]

By adopting the plate material unloading clamp device of the present invention and the plate material clamping method using the device, for example, when unloading a workpiece machined by a plate material processing machine, the unloading clamp body mounted on the loader is used. Advance to the work side. Then, the work holding member provided on the carry-out clamp main body is made to stand by at a position where it is hooked on the side of the work, and the lower clamp jaw is retracted, that is, set at the stand-by position.

From this state, the carry-out clamp body is lowered and stopped at a position where the upper surface of the clamp lower jaw is slightly lowered from the back surface of the work. At this time, if the work is warped, the work holding member hits the upper surface of the work while the carry-out clamp main body is being lowered, and the work is pushed by the work holding member to be in a horizontal state.

When the lowering of the carry-out clamp main body is completed, the lower clamp show is advanced to enter the back surface of the work, the work holding member is lowered, the work is gripped between the lower jaw of the clamp, and the work is conveyed. . For this reason, it is possible to reliably clamp the work that is warped, and improve workability.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings. With reference to FIG. 5, in the present embodiment, the work processed by, for example, a turret punch press as a plate material processing machine is carried out by the plate material conveying device.
The turret punch press is not limited to this structure, and the turret punch press has a known structure. Therefore, detailed description thereof will be omitted.

The turret punch press 1 has a base 3, on which an upper frame 5 is mounted.
It is provided integrally with.

The base 3 and the upper frame 5 each have a disk-shaped upper turret 7 having a large number of punches P, and a lower turret 9 having a die D at a position corresponding to the punches P.
And are rotatably supported vertically facing each other. A ram 11 is provided on the upper part of the upper turret 7 so as to be vertically movable by a driving member 13 provided on the upper frame 5, for example, a crank mechanism. Further, the work tables 17F and 17B are provided with a plurality of ball bearings 15 on which the work W is placed on both sides of the base 3 and which are movable.
Is provided to configure the turret punch press 1.

A guide rail 19 is horizontally installed on the unloading side of the work W of the turret punch press 1, and a loader 21 is provided on the guide rail 19 so as to be movable before and after suspension (left and right in FIG. 5). . The loader 21 can be moved back and forth on the guide rail 19 via a drive device 27 from a forward / reverse drive motor 25 provided in the loader main body 23, and a plate material discharge clamp device 29 is provided below the loader main body 23.

The work W gripped by the plate material discharge clamp device 29 is moved by the loader 21 to lifter table 3.
1 is loaded.

The plate material discharge clamp device 29 will be described in more detail. Referring to FIG. 1, a bracket 23A, which is a member constituting the loader body 23, is provided with an LM guide member 33 extending in the vertical direction.
A vertical slider 35 is attached to the LM guide member 33. A bracket 35A integrally provided on the vertical slider 35 is coupled to the tip of a piston rod 39 of a fluid pressure operated cylinder 37 which is vertically installed on a bracket 23A integrally provided on the loader body 23. ing. Further, a clamp support portion 41 is provided integrally with the vertical slider 35 so as to project horizontally.

With the above structure, the fluid pressure cylinder 3
When 7 is operated and the piston rod 39 is projected,
The vertical slider 35 is guided by the LM guide member 33 and moved down. The lowering of the vertical slider 35 also lowers the clamp support portion 41 provided integrally with the vertical slider 35. Further, when the fluid pressure operated cylinder 37 is reversely operated and the piston rod 39 is pulled up, the clamp support portion 41 moves up. This is to enable the plate material unloading clamp device 29 to change the clamp position during standby, during clamping, during transportation, and the like.

The bracket 45 provided on the plate material unloading clamp main body 43, which is one member of the plate material unloading clamp device 29, is fitted to the shaft 47 provided on the clamp support portion 41, and the clamp device body 43 mounts the shaft 47 on the shaft 47. As a fulcrum, it can swing a little. A lever 49 extending in the horizontal direction is integrally provided on the bracket 45 so that the plate material discharge clamp main body 43 is always held in a horizontal state, and a pin 51 is provided upright at the tip of the lever 49. As the elastic member 53, for example, a coil spring is wound around the pin 51. Then, this elastic member 53
Is mounted between the upper surface of the lever 49 and the inner surface of the upper plate 41a provided on the clamp support portion 41.

With the above structure, the plate material discharge clamp body 4
3 is held in a horizontal state by the elastic force of the elastic member 53, and when the work W is gripped by the work material unloading clamp device 29, the work material weight causes the work material unloading clamp main body 43 to rotate counterclockwise with the shaft 47 as a swing fulcrum. It swings in the direction of rotation to prevent breakage of the work side.

The plate material discharge clamp body 43 is provided with a bracket guide 57 to which a hydraulically operated cylinder 55 that operates in the horizontal direction is attached. The bracket guide 57 penetrates through the bracket guide 57 and the piston rod of the cylinder 55. 59 is provided so as to be movable in the front-rear direction.
An L-shaped lower clamp jaw 61 is fixed to the tip of the piston rod 59. A work holding device 63 is provided at the front of the plate material discharge clamp body 43. More specifically, a fluid pressure-operated cylinder 65, which is a member of the work holding device 63, is erected on the upper front surface of the plate material discharge clamp body 43, and the piston rod 67 mounted on the cylinder 65 A work holding member 69 is fixed to the lower end.

The work holding member 69 is made of, for example, urethane or the like, and is selected such that the surface of the work W is not flawed when the work W is pressed and held.

With the above structure, the lower clamp jaw 61 is stopped at the forward limit as described above, and the cylinder 65 is
The work holding member 69 is lowered by the operation of, and the work W is clamped by the cooperation of the clamp lower jaw 61 and the work holding member 69.

A little behind the work holding member 69,
A work stopper 71 is provided, and this work stopper 7
1 is provided integrally with the plate material discharge clamp main body 43. The work stoppers 71 are located on both sides of the clamp lower jaw 61, and the work contact surfaces 71a of the work stopper 71 are fixed to the clamp lower jaws 6.
The tip of the clamp lower jaw 61 is positioned so as to be retracted when 1 is in the retracted limit.

With the above-mentioned structure, the operation of the plate material carrying-out clamp device 29 will be described with reference to FIGS. 2, 3 and 4. As shown in FIG. Standing by at a position higher than the PP line. However, at the end of processing, the work pressing member 69 is caught on the side of the work W, and the clamp lower jaw 61
It is necessary to stand by at a position where the work W is not hung up in the retracted state.

When the plate material unloading clamp device 29 is in the standby state, as shown in FIG. 3, when processing is completed, the cylinder 37 (not shown) is operated to lower the plate material unloading clamp body 43. Clamp lower jaw 6 at this time
1 is in the state of being evacuated.

The upper surface of the clamp lower jaw 61 is lowered to the same position as the pass line P--P or a slightly lower position, but if the work W is warped as shown in the drawing, the plate material discharge clamp main body 43. The upper surface of the work W along the work pressing member 69 provided on the upper side abuts. Further, by continuing the lowering of the plate material discharge clamp main body 43, the work W is pushed by the work holding member 69 and becomes horizontal.

The lowering of the plate material discharge clamp main body 43 is completed,
That is, the upper surface of the clamp lower jaw 61 is stopped at the same position as or slightly lower than the pass line PP, and the clamp lower jaw 61 is moved to the back surface of the work W by the operation of the cylinder 55. Next, the cylinder 65 is operated to lower the work holding member 69, and the clamp lower jaw 6
The work W is conveyed to the stacking position by gripping the edge of the work W between the upper surface of the work 1 and the upper surface of the work 1.

As described above, even if the end edge of the work W is along, it can be reliably clamped by pressing the warped work W by the work pressing member 69 to make it horizontal. At this time, the plate material discharge clamp device 2
The total lowering amount of 9 does not need to consider the warp amount of the work W and the like, and the upper surface of the clamp lower jaw 61 may always be positioned at the pass line PP line or at a position slightly lower than that, and a special device is used. No need to add.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0031]

As can be understood from the above description of the embodiments, according to the present invention, the lower clamp jaw is retracted when the workpiece is clamped so that the lower clamp jaw is disengaged from the workpiece. Then, from the state in which the work pressing member is located inside the work side, the plate material unloading clamp device is lowered, so that the work pressing member presses the warped work and returns it horizontally to clamp it.

Thus, even if the work is warped, the work can be reliably grasped and conveyed, the workability can be improved, and the plate material discharge clamp device can be freely swung with respect to the loader. This makes it possible to prevent the work from breaking.

[Brief description of drawings]

FIG. 1 is a side view of a clamp device showing a main part of the present invention.

FIG. 2 is an operation explanatory view according to the present invention.

FIG. 3 is an operation explanatory view according to the present invention.

FIG. 4 is an operation explanatory view according to the present invention.

FIG. 5 is an explanatory diagram showing an outline of a turret punch press and a plate material conveying device of an embodiment for carrying out the present invention.

[Explanation of symbols]

 21 Loader 29 Plate Material Unloading Clamp Device 35 Vertical Slider 43 Plate Material Unloading Clamp Main Body 53 Elastic Member 61 Clamp Lower Jaw 63 Work Holding Device 69 Work Holding Member 71 Work Stopper 71a Work Contact Surface W Work

Claims (3)

[Claims] 1. A plate material unloading clamp device for clamping and transporting one end of a work processed by a plate material processing machine, wherein a unloading clamp main body is provided which is vertically movable with respect to a movable loader. A plate material unloading / clamping device comprising: a work pressing member which is vertically movable on an upper part of a main body; and a clamp lower jaw which is movable forward and backward with respect to a position of the work pressing member is provided on a lower part of the unloading clamp main body. 2. The plate material unloading clamp device according to claim 1, wherein the unloading clamp main body is provided so as to be tiltable with respect to an upper and lower slider provided on the loader so as to be vertically movable. 3. When a work processed by a plate material processing machine is clamped by a plate material unloading clamp device and conveyed, the clamp lower jaw provided on the unloading clamp body is retracted from one end of the work and hung on the work. The lower clamp jaw is lowered from the state where the work clamp member is located within one end of the work and the upper surface of the lower clamp jaw is positioned lower than the back surface of the workpiece, and then the lower clamp jaw is advanced below the workpiece. Then, the plate clamping method is characterized in that the work holding member is lowered to clamp the work with the clamp lower jaw and the work holding member.