JPH05285687A - Work clamping device for laser beam machine - Google Patents

Abstract

PURPOSE:To facilitate the carrying in and out of a work and to avert the collision of an upper claw against a processing head by providing a means for actuating the upper claw of a clamp upward and downward in a vertical direction and a link mechanism for moving the upper claw forward and backward. CONSTITUTION:This clamping device has an upper claw 1 and a lower claw 2 for pressing the work 10. The upper claw 1 ascends right above to the state of the arising center of a shaft 6 sticking to a bearing 5 and a roller 9 when the shaft of an air cylinder 7 ascends and the centers of the shaft 6 and the roller 9 ascends. The upper claw 1 descends while the claw is pulled backward when the shaft of the air cylinder 7 ascends further. The upper claw 1 can be moved up, backward and down by one piece of the air cylinder and the work clamping device is constituted compact. The control of the flow of the air is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser beam machine, and more particularly, to a work clamp device for the laser beam machine.

[0002]

2. Description of the Related Art FIG. 3 is a front view, a side view, and a top view of a work clamp device A in which a conventional upper claw swings. In FIG. 3, 10 is a work, 11 is a work support pin that supports the work 10, 1 is an upper claw for pressing the work 10 from above,
2 is a lower claw that supports the work 10 from below, 7 is an air cylinder that is a driving source, and 12 is an upper claw 1 and an air cylinder 7.
Is a guide that guides the rotation of the upper claw 1 and the shaft 12, and 14 is a bearing that guides the shaft 12.

Next, the operation will be described. In FIG. 4, (a) shows the state where the work is clamped.
The figure (b) shows the state where the work is unclamped.
When the shaft is further lifted from the state shown in FIG. 6B, the guide 13 is circumferentially guided along the groove of the bearing 14, and the upper pawl 1 rotates to move the work 10 upward. You can take it out.

Next, a work clamp device using two conventional air cylinders will be described with reference to FIG.
In FIG. 5, 10 is a work, 11 is a work support pin that supports the work 10, 1 is an upper claw for pressing the work 10 from above, 3 is a body for fixing the work clamp device to the table, and 7 is air for moving the upper claw 1 up and down. Cylinder, 12 is a shaft for connecting the upper claw 1 and the air cylinder 7, 17
Is a joint for allowing the shaft 12 and the upper claw 1 to freely rotate, 22 is a nut for fixing the joint 17 and the air cylinder 7, 23 is a bolt for fixing the upper claw 1 and the shaft 12, and 15 is a guide for the shaft 12. Bearing. Next, 18 is an air cylinder that is a drive source for rotating the upper claw 1, 16 is a guide connected to the air cylinder 18, and 20 is a long hole formed in the shaft 12, and the driving force of the air cylinder 18 is set. Is a crank that converts the torque into the rotational force of the upper claw 1. Reference numeral 19 is a shaft for guiding the guide 16, and reference numeral 21 is a linear bush necessary for the guide 16 to move smoothly.

Next, the operation will be described. First, in FIG. 5, the upper claw 1 moves up and down by driving the air cylinder 7. When the upper claw 1 is raised, the guide 16 is slid by the air cylinder 18, and the crank 20 rotates the shaft 12 and the upper claw 1. Furthermore, a usage example using these operations will be described in order with reference to a stereoscopic view. In FIG. 6, from the state where the upper claw 1 of the work clamp device B is rotated and lowered, after setting the work, the upper claw 1 is raised as shown in (1). Next, the upper claw 1 is rotated as in (2), and the upper claw 1 is lowered in (3) to fix the work. Next, to carry out the work (4)
As described above, the upper claw 1 is raised, and the work which rotates in (5) and descends in (6) is lifted by the work lifting device equipped on the table and is carried out in the direction of the arrow. At this time, the upper claw 1 is located below the lower surface of the work.

[0006]

Work clamp device A
In the case of (2), it is difficult to carry in and carry out the work because the structure is such that the upper claw rises while rotating.

In the case of the work clamp device (B), it goes up →
Unclamping in the order of rotation → descending solves the problem of the work clamp device (A), but requires two actuators, which complicates the structure and makes the device itself large and expensive. Becomes In the case of the work clamp device (A) as well, since the upper claw rotates, a space for the rotation radius is required, and the distance between the work clamp device and the work clamp device becomes large, so that a small work cannot be grasped. There was a problem such as.

The present invention has been made to solve the above problems, and facilitates the loading and unloading of a work, and at the time of processing, it is possible to prevent the upper claw from colliding with the processing head. An object of the present invention is to obtain a work clamp device for a laser processing machine.

[0009]

In a work clamp device for a laser beam machine according to the present invention, a work clamp device disposed in a work support portion has a clamp upper claw for pressing a work, a clamp lower claw, and a clamp upper claw. The driving means for vertically moving the claws and the link mechanism for moving the clamp upper claws back and forth by the lifting operation of the driving means are provided.

[0010]

Operation: A single drive means can raise, retract and descend. Also, since there is only one driving means, the air flow is two systems.

[0011]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 10 is a work, 11 is a work support pin for supporting the work 10, 1 is an upper claw for pressing the work 10 from above, 2 is a lower claw for supporting the work 10 from below, 3 is a work clamp device fixed to a table. A body, 7 is an air cylinder as a drive source, 4 is a connecting rod that connects the upper claw 1 and the air cylinder 7, 5 is a bearing that supports the connecting rod 4, and 6 is a connection between the upper claw 1 and the connecting rod 4 and the bearing 5. A shaft for rotating, a roller 9 for guiding the connecting rod 4, and a spring 8 for giving a force necessary for moving the upper claw 1 backward.

The operation of the thus constructed embodiment of the present invention will be described below. FIG. 2 (a) shows a shaft 6 attached to a bearing 5 by raising the shaft of the air cylinder,
This shows a state where the center of the roller 9 is raised to the same position. Up to this state, the upper claw 1 rises right above. Further, when the shaft of the air cylinder 7 rises, the position shown in FIG.
As shown in (b), the upper claw 1 is lowered while being pulled backward by the spring 8.

[0013]

As described above, since the upper claw can be raised, retracted and lowered by one air cylinder, it is compact and inexpensive. Further, in the case of the work clamp device (B), two air cylinders are required, so that the air flow has four systems. However, in the present invention, since there is one air cylinder, there are two systems. Therefore, the control of the air flow becomes simple.

[Brief description of drawings]

FIG. 1 is a front view, a side view, and a top view of a work clamp device according to an embodiment of the present invention.

FIG. 2 is a state diagram showing the operation of one embodiment of the present invention.

FIG. 3 is a front view, a side view, and a top view of a conventional work clamp device (A).

FIG. 4 is a state diagram showing an operation of a conventional work clamp device (A).

5 shows a conventional work clamp device (B), and FIG.
5A is a front view, and FIG. 5B is a sectional view B- of FIG.
5B is a sectional side view, FIG. 5C is a top view, and FIG. 5D is a sectional view taken along the line AA in FIG. 5B.

FIG. 6 is a state diagram showing an operation of a conventional work clamp device (B).

[Explanation of symbols]

 1 Upper Claw 2 Lower Claw 3 Body 4 Connecting Rod 5 Bearing 6 Shaft 7 Air Cylinder 8 Spring 9 Roller 10 Work 11 Work Support Pin 12 Shaft 13 Guide 14 Bearing 15 Bearing 16 Guide 17 Joint 18 Air Cylinder 19 Shaft 20 Crank 21 Linear Bushing 22 nuts 23 bolts

Claims (1)

[Claims] 1. A work clamp device disposed on a work supporting portion of a laser processing machine for irradiating a work with a laser beam for processing, wherein the device has a clamp upper claw for pressing the work and a clamp lower part. A workpiece for a laser beam machine, comprising: a claw, a driving means for vertically moving the clamp upper claw up and down, and a link mechanism for moving the clamp upper claw back and forth by the vertical movement of the driving means. Clamp device.