JPH0522893Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a guide joint device for an articulated laser beam guide device in a device that handles a laser beam, such as a laser beam processing machine.

[Prior Art] Conventionally, for example, the joints of an articulated laser beam guide device in a device that handles a laser beam, such as a laser beam processing machine, are directly attached to a mirror block on which a tubular member for protecting the optical path rotates. There is.

[Problems to be solved by the invention] If the optical path protection tubular member is directly attached to the rotating mirror block at the joint part of the multi-joint type laser beam guide device, as in the conventional technology, the optical path protection Since the weight of the tubular member and the external force applied to the member are applied to the mirror block, the tilt of the mirror changes, and due to the change in the tilt of the mirror,
Optical accuracy will be lost. For example, running accuracy cannot be maintained in a laser beam processing machine or the like, making it impossible to perform high-quality processing. Therefore, if an attempt is made to increase the strength of the mirror block, the device becomes larger.

This idea attempts to maintain the optical precision of the device by eliminating forces from being applied to the mirror block.

[Means for Solving the Problems] In the guide joint device of the multi-joint type laser beam guide device according to this invention, a support tube through which the laser beam passes is provided in the base body, and a support tube is provided on the outer periphery of the support tube via a bearing. A mirror block through which a laser beam passing through the support tube is incident is attached to the tip of a rotatable tube that is rotatably fitted, and the end is close to the mirror block so that the laser beam reflected from the mirror block can pass through. A tubular member for protecting the optical path is attached to the rotary tube separately from the mirror block.

[Function] When the optical path protection tubular member is rotated relative to the base body due to the operation of other parts of the laser beam device, the rotating tube that is rotatably attached to the base body and to which the optical path protection tubular member is attached is rotated. It also rotates. Then, the mirror block attached to the rotary cylinder also rotates as a unit. Therefore, the optical path protection tubular member and the mirror block rotate while maintaining their relative relationship via the rotating cylinder, so no matter which direction the optical path protection tubular member is oriented, the laser reflected by the mirror block will not be affected. The beam passes through a path protecting tubular member whose end is close to the mirror block. At this time, the weight of the optical path protecting tubular member and the external force applied to the member are supported by the base body via the rotary cylinder and are not applied to the mirror block.

[Example] An embodiment of this invention will be described according to the drawings.

The drawings show, for example, a guide joint device in an articulated laser beam guide device for a device that handles a laser beam, such as a laser beam processing machine.

A support cylinder 2 is implanted in the stationary base 1 so that the laser beam from the base passes through the cylinder, and a rotating cylinder 4 is fitted around the outer periphery of the support cylinder 2 via a bearing 3. has been done. On the tip surface of the rotating cylinder 4,
One surface of a mirror block 5 is fixed close to the distal end surface of the support tube 2, and on the outer surface of the rotary tube 4,
A mounting bracket 7 for mounting the optical path protection tubular member 6 is fixed. An end portion of the optical path protecting tubular member 6 is fixed to the mounting bracket 7 so that the end surface is close to the other surface of the mirror block 5.

The laser beam from the fixed base 1 passes through the support cylinder 2 and enters the mirror block 5, and the laser beam reflected there travels inside the optical path protection tubular member 6 from one end to the other end. penetrate.

When the optical path protection tubular member 6 rotates around the support tube 2 with respect to the base 1 due to the operation of other parts of the laser beam device, the optical path protection tubular member 6 is attached via the mounting bracket 7. The cylinder 4 also rotates. Then, the mirror block 5 separately attached to the tip surface of the rotary cylinder 4 also rotates integrally. Since the optical path protection tubular member 6 and the mirror block 5 rotate while maintaining their relative relationship, no matter which direction the optical path protection tubular member 6 is rotated, the laser beam reflected by the mirror block 5 will not be affected. There is no change in the penetration inside the optical path protection tubular member 6.

Moreover, at this time, the weight of the optical path protection tubular member 6 and the external force applied to the member are supported by the fixed base body 1 via the mounting bracket 7 and the rotary tube 4, and are not applied to the mirror block 5.

The above fixed side base body 1 is not absolutely fixed, but has a relative relationship with the optical path protection tubular member 6, and the guide joint device of the multi-joint type laser beam guide device according to this invention has one laser beam guide member. It can be applied to connection points that rotate with respect to other laser beam guide members together with the mirror block.

[Effect of the invention] In the guide joint device of the multi-joint type laser beam guide device according to this invention, since the rotating optical path protection tubular member is not directly attached to the rotating mirror block, the optical path protection tubular member The weight of the member and the external force applied to the member are supported by the base body via the rotary cylinder and are not applied to the mirror block.

Therefore, the inclination of the mirror is not affected and optical precision can be maintained without increasing the size of the device to increase the strength of the mirror block. For example, running accuracy is maintained in laser beam processing machines, etc.
High quality processing is possible.

[Brief explanation of drawings]

The drawing is a partial front view, partially in section, showing an embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Fixed side base body, 2... Support tube, 3... Bearing, 4... Rotating tube, 5... Mirror block, 6...
...Tubular member for optical path protection, 7...Mounting bracket.

Claims (1)

[Scope of utility model registration request] In an articulated laser beam guide device of a laser beam device, a base body is provided with a support tube through which the laser beam passes, and the support tube is attached to the tip of a rotary tube rotatably fitted to the outer periphery of the support tube via a bearing. A mirror block is a tubular member for optical path protection that is attached with a mirror block into which the laser beam penetrating the tube enters, and whose end is close to the mirror block so that the laser beam reflected from the mirror block passes through. A guide joint device that is separately attached to the rotating tube.