JP2000233337A - Work-clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent buckling of a work without interfering with a table by providing a supporting shaft serving as a center of tilting at the tip of a front upper jaw of a work holding part, namely at the position which departs from the front face of a clamp supporting frame. SOLUTION: In a work clamp device which is used for a work carrying system of a plate working machine such as a turret punch press, a guide rail 2 is provided to extend above a table 1 of a plate working machine, and a lifter on which a work storage pallet 4 is placed, is arranged at the base of a pillar of the guide rail. A clamp supporting frame 7 is hung on a slider which engages with the guide rail above the lifter and which can freely travel along the guide rail, through a vertically moving cylinder. A vertical plate-like arm part 8 is provided in front of the clamp supporting frame 7 so that it is laterally projected forwardly, and a supporting shaft 10 which engages with a front upper jaw-tip of a work holding part 9, is provided at the projected end of the vertical plate-like arm part 8. Further, a hinge mechanism KH which follows a work W to be tilted is provided to prevent breakage of the work W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work clamping device used for a work transfer device of a plate processing machine such as a turret punch press.

[0002]

2. Description of the Related Art As shown in FIG. 3, a hinge mechanism of a work clamping device in a work transfer device of a conventionally used plate material processing machine such as a turret punch press has a support shaft for tilting which is located on the front side of a clamp support frame. In the vicinity of the holding portion close to the holding member.

[0003]

However, in the above-mentioned prior art, the support shaft for tilting is provided behind the holding portion close to the front surface on the clamp supporting frame side, so that the clamp device main body tilts downward. In some cases, as shown in FIG. 5, the leading end of the holding portion may pass over the pass line and interfere with the lower table.

Although the inclination angle of the clamping portion of the clamping device is adjusted to prevent the work from breaking, the tip of the clamping portion interferes with the table below the pass line when the inclination angle of the clamping portion is set large. When the inclination angle of the holding portion is insufficient, there is a problem that the work tends to be bent as shown in FIG.

The present invention has been made by paying attention to the points described above, and a support shaft serving as a center of tilting is provided at the front upper jaw end of the holding portion so as to be separated from the front surface of the clamp support frame side. It is another object of the present invention to provide a work clamping device capable of preventing the work from breaking down without interfering with the table even if the inclination angle of the clamping device holding portion is large.

[0006]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A work clamping device used in a work transfer device of a plate processing machine such as a turret punch press, wherein a guide rail is provided extending above a table of the plate processing machine, and a support base of the guide rail is provided. A lifter on which a work accumulation pallet is placed is arranged, and a clamp support frame is suspended via a vertically moving cylinder on a slider that engages above the movable pallet and runs along the guide rail,
A vertical plate-shaped arm is projected laterally forward from the front surface of the clamp support frame, and a support shaft is provided at the protruding end of the vertical plate-shaped arm by engaging the front upper jaw end of the holding portion. A work clamp device comprising a hinge mechanism that can be tilted to follow the workpiece and prevents the work from breaking.

(2) The hinge mechanism includes a vertical plate-like arm,
A holding portion, a support shaft provided at the front upper jaw end of the holding portion, a rod-shaped body with a head wound with a spring member, a small arm portion with a guide hole,
A stopper bolt forming a projection and a receiving member, and when the clamping portion clamps the work at the front upper jaw end of the clamping portion, it can be tilted about the support shaft in accordance with the inclination of the work, and the clamp supporting frame side A base portion of a rod-shaped body with a head, on which a spring member is wound, is supported on the upper surface of the rear end portion of the holding portion, and the rod-shaped body with a head is vertically movable. The clamp member is horizontally projecting forward from the front upper portion of the clamp support frame, and the spring member urges the upper surface of the rear end portion of the holding portion downward by pressing it downward, and usually holds the holding portion horizontal. Is possible, and
A stopper bolt is formed on a side surface of a rear end portion of the holding portion located on the side of the clamp support frame to form a protrusion at an appropriate portion to prevent the holding portion from being inclined upward. The workpiece according to the above (1), wherein the workpiece is provided in engagement with a receiving member.
Clamping device.

[0009]

FIG. 1A is a side sectional view showing an embodiment of a work clamping device according to the present invention.
2 (b) and 2 (c) are side views showing the operation of the work clamp apparatus, FIG. 2 is a side view showing the overall arrangement of the apparatus, and FIG. 3 is a side view showing the hinge mechanism of a conventional work clamp. 4 is a side view showing the operation of the hinge mechanism of the conventional work clamp, FIG. 5 is a side view showing the state of interference of the conventional work clamp with the table, and FIG. 6 is a broken work of the conventional work clamp. It is a side explanatory view showing a situation.

First, the configuration of a turret punch press as an example of a plate material processing machine and the entire apparatus will be described with reference to FIG.

A lifter Lf for placing the work collecting pallet 4 is disposed adjacent to a plate processing machine such as a turret punch press P.

The guide rail 2 extends from above the lifter Lf to above the table of the sheet material processing machine, and the slider 5 travels along the guide rail 2 in a self-propelled manner. A clamp support frame 7 is attached to the slider via a vertical cylinder 6.
The clamp support frame 7 is provided with a work clamp which is processed by a plate processing machine and holds the work W to be carried out.

A turret punch press P as an example of a plate material processing machine has a plurality of punches and dies mounted on upper and lower turrets in a circumferential shape, and a desired punch and die are indexed under a ram by rotating the upper and lower turrets. A desired processing position is positioned between the punch and the die under the ram, and the ram is operated through the punch and the die to perform processing on the work. The processed work is placed on the table 1. ing.

An embodiment of the present invention will be described below with reference to FIGS. 1 (a), 1 (b) and 1 (c) and FIG.

A clamp support frame 7 is suspended via a vertically movable cylinder 6 on a slider 5 that can travel along the guide rail 2, and a vertical plate-like arm 8 is provided on the front surface of the clamp support frame 7 so as to face forward. A hinge mechanism KH is provided to protrude in the lateral direction, engages with the front end of the upper jaw of the holding section 9 at the protruding end of the vertical plate-shaped arm section 8, provides a support shaft 10, and can follow the workpiece W and can tilt freely. The hinge mechanism KH includes a vertical plate-shaped arm portion 8, a holding portion 9, a support shaft 10 provided at a front upper jaw end of the holding portion 9, a rod-shaped body 12 with a head wound with a spring member 11,
It consists of a small arm 7a with a guide hole, a stopper bolt 13 forming a projection, and a receiving member 13a, and is adapted to the inclination of the work W when the holding part 9 holds the work W at the front upper jaw tip of the holding part 9. The holding portion 9 which can be tilted around a support shaft 10 and is located on the clamp support frame 7 side.
The base of a rod-shaped body 12 with a head on which a spring member 11 is wound on the upper surface of the rear end is pivotally supported (12a) to stand upright. 7a
Is horizontally projecting forward from the front upper portion of the clamp support frame 7, and the spring member 11 urges the upper surface of the rear end portion of the holding portion 9 downward by pressing the holding member 9. Can be maintained horizontally, and on the side surface at the rear end of the holding portion 9 located on the side of the clamp support frame 7, there is provided a projection at an appropriate portion to prevent the holding portion 9 from inclining upward and reversely. A receiving member 13a in which a stopper bolt 13 to be formed protrudes from the lower end of the front surface of the clamp support frame 7.
And a hinge mechanism K as shown in FIG.
By disposing the support shaft 10, which is the center of the tilting of the holding portion 9 forming H, away from the clamp support frame 7 and forward, the tip of the holding portion 9 does not descend beyond the pass line, and the table It does not interfere with the configuration.

The operation will be described based on FIG. 2 and the above-described configuration.

The work W processed by the turret punch press P is placed on the table 1, and the work transfer device U
The slider 5 constituting L moves above the table 1 along the guide rail 2, descends and stops at a predetermined position, and the end of the processed work W is held by the holding portion 9 forming the hinge mechanism KH. Then, it travels above the lifter Lf while being raised by the action of the vertical moving cylinder 6, stops at a predetermined position, and places and accumulates the processed work W on the work accumulation pallet.

In the above-mentioned process, when the holding portion 9 constituting the hinge mechanism KH holds the end of the processed work W, it follows the inclination state of the work and resists the downward pressing force of the spring member 11. Then, the spring member 11 is pushed up and contracted, and at the same time, the rod-shaped body 12 with the head is pushed upward by using the small arm portion 7a with the guide hole as a guide, and the front support shaft 1 is moved.
Tilting the holding portion 9 about 0 to maintain the optimum tilt angle,
The work W can be accumulated on the work accumulation pallet 4 while preventing the work W from breaking.

Further, a stopper bolt 13 constituting the hinge mechanism KH and forming a projection, and the stopper bolt 13
And the receiving portion 13a protruding from the lower end of the clamp support frame 7 to prevent the holding portion 9 from tilting its tip upward and backward.

In addition, a fluid cylinder other than a spring member may be used for the tilting operation of the holding portion 9.

[0021]

According to the present invention, the support shaft serving as the center of tilt is provided at the front end of the upper jaw of the holding portion at a distance from the front surface on the side of the clamp supporting frame, so that the inclination angle of the holding portion of the clamping device is increased. It is an object of the present invention to provide a work clamp device that can prevent a work from breaking down without interfering with a table even if it is used.

[Brief description of the drawings]

FIG. 1A is a side sectional view showing an embodiment of a work clamping device according to the present invention, and FIGS. 1B and 1C are side explanatory views showing the operation of the work clamping device.

FIG. 2 is a side view showing the overall arrangement of the apparatus.

FIG. 3 is an explanatory side view showing a hinge mechanism of a conventional work clamp.

FIG. 4 is an explanatory side view showing an operation of a hinge mechanism of a conventional work clamp.

FIG. 5 is an explanatory side view showing a state of interference of a conventional work clamp with a table.

FIG. 6 is an explanatory side view showing a state in which a conventional work clamp has broken a work;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 2 Guide rail 3 Support base 4 Work accumulation pallet 5 Slider 6 Vertical movement cylinder 7 Clamp support frame 7a Small arm part with a guide hole 8 Vertical plate-shaped arm part 9 Nipping part 10 Support shaft 11 Spring member 12 Rod body with head 13 Projection (stopper bolt) 13a Receiving part 14 Conventional holding part KH Hinge mechanism KHJ Conventional hinge mechanism Lf Lifter UL Work transfer device P Turret punch press

Claims (2)

[Claims] 1. A work clamping device used for a work transfer device of a plate material processing machine such as a turret punch press, wherein a guide rail is provided extending above a table of the plate material processing machine, and is provided at a base of a column of the guide rail. A lifter on which a work accumulation pallet is placed is disposed, and a clamp support frame is suspended via a vertically moving cylinder on a slider which engages above the pallet and is movable along the guide rail. A vertical plate-shaped arm is provided on the front side in a lateral direction so as to protrude forward, and a protruding end of the vertical plate-shaped arm is engaged with the front upper jaw end of the holding portion to provide a support shaft to follow the workpiece. A work clamping device comprising a hinge mechanism which can be tilted freely to prevent the work from breaking. 2. The hinge mechanism includes a vertical plate-like arm portion, a holding portion, a support shaft provided at a front end of a front upper jaw of the holding portion, a rod-like body with a head wound around a spring member, and a small arm with a guide hole. And a stopper bolt forming a projection, and a receiving member. When the clamping portion clamps the work at the front end of the upper jaw of the clamping portion, the clamping portion can be tilted about a spindle in accordance with the inclination of the work, and the clamp support is provided. The base of a rod-like body with a head, on which a spring member is wound, is supported on the upper surface of the rear end portion of the holding part located on the frame side to stand upright. An arm is horizontally protruded forward from the front upper portion of the clamp support frame, and the spring member urges the upper surface of the rear end portion of the holding portion downward to press the holding portion. On the clamp support frame side A stopper bolt, which is formed on a side surface of a rear end portion of the located holding portion at an appropriate position to prevent the holding portion from being inclined upward, is engaged with a receiving member projecting from a front lower end portion of the front surface of the clamp support frame. The work clamping device according to claim 1, wherein the work clamping device is provided in combination.