JPH0321829Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a mirror holder with a tilting mechanism provided in a laser optical path of a laser processing machine or the like.

<Prior Art> Laser processing machines for processing workpieces are equipped with rotating sections that rotate at different rotation axes at multiple locations in the laser beam path so that the laser torch faces the processing surface of workpieces of various shapes at right angles. A mirror that refracts and reflects the laser optical axis to guide it to the laser torch is disposed at the center. This mirror deteriorates with use, so the mirror must be replaced periodically or the mirror angle adjusted to adjust the optical axis. A mirror holder is detachable from the mirror block of the rear mirror in order to confirm the alignment of the laser optical axis refracted and reflected by the front mirror. As for its structure, the applicant of the present application first filed a patent application in 1983.
-A patent application has been filed under No. 144829. This one is the second
As shown in the figure, the mirror holder A that is detachably attached to the mirror block 28 includes a mounting member 61 that fits into the spigot part 64 of the mirror block 28 and is fixed by tightening with a bolt 63, and a mounting member 61 that is attached in front of the mounting member 61. It is composed of a rotating member 60 that is slidably attached by spherical fitting, and an adjustment bolt 62 that is threaded through the rotating member 60 and comes into contact with the mounting member 61. A mirror 42 is attached to the front end of the rotating member 60. Fixed.

<Problems to be solved by the invention> In the mirror holder A having the above configuration, when removing the mirror holder A from the mirror block 28,
Since the wall thickness of the mounting member 61 is thin in the radial direction, the force when adjusting the mirror angle of the rotating member 60 with the adjusting bolt 62 acts on the mounting member 61, and the outer peripheral surface of the mounting member 61 bites into the mirror block 28. ing. Therefore, mirror holder A cannot be removed from mirror block 28, so mirror holder A is removed after loosening adjustment bolt 62 to ease the biting of mounting member 61 into mirror block 28. As a result, the mirror alignment becomes twisted, and readjustment is required after attaching the mirror holder A.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention has been developed by attaching a sheet member to a mirror block in which two mutually intersecting optical paths are formed in a positionable and removable manner. A cup-shaped mounting member is attached to the member so that the bottom is on the opposite side of the sheet member, a window is formed at the bottom of the mounting member, a concave spherical surface is formed around the window, and a convex spherical surface is formed on this concave spherical surface. 2.
A through hole is formed in the rotating member on the bisector of the angle formed by the two optical paths, and a front surface locking portion is provided in the rotating member to lock the front surface of the mirror fitted in the through hole on the sheet member side; A mirror holder that presses the mirror against the front locking part is screwed into the through hole of the rotating member through the window of the mounting member, and a plurality of adjustment bolts are screwed into the rotating member in parallel with the through holes. A mirror holder in which one end of the adjustment bolt is brought into contact with the seat member, the other end is made to protrude outside on the window side through the mounting member, and a spring is inserted between the seat member and the rotating member to press the convex spherical surface against the concave spherical surface. It provides:

<Function> The present invention has a configuration in which a concave spherical surface is formed on the bottom opposite to the seat member, and the convex spherical surface of the rotating member is fitted into this concave spherical surface. The spreading force does not act on the attachment surface of the sheet member to the mirror block, and
The mounting member can be removed more easily than the mirror block without loosening the adjustment bolt.

<Example> An example of the present invention will be described below based on FIG. 1. Reference numeral 1 denotes a mirror block. Two optical paths intersecting each other are formed in this mirror block 1, and a laser optical path tube 2 is coaxially connected to each optical path. This mirror block 1 has a spigot part 3.
A sheet member 4 having a reference surface 5 is fitted into this spigot part 3. A cup-shaped mounting member 6 is attached to the seat member 4, and a window is provided at the bottom of the mounting member 6 provided on the opposite side of the seat member 4, and a concave spherical surface 7 is formed around the window. There is. By fitting the integrated sheet member 4 and mounting member 6 into the spigot part 3, positioning with respect to the mirror block 1 is achieved, and by screwing the bolt 18 into the mirror block 1, the sheet member 4 and the mounting member 6 are connected. An integrated attachment member 6 is detachably attached to the mirror block 1.

8 is a rotating member. A locking portion 9 for locking the front edge of the mirror 11 to prevent the mirror 11 from coming off forward is provided at the front of the rotating member 8, and a convex spherical surface 10 spherically fitted to the concave spherical surface 7 is provided at the rear. is formed.

A mirror holder 12 presses the mirror 11 from behind, and presses the mirror 11 forward via a cooling water block 13 that is in contact with the rear surface of the mirror 11. The cooling water block 13 has a cooling water pocket 14 into which cooling water is introduced from a cooling water supply pipe 15 to cool the mirror 11 from being heated by the laser beam.

16 is an adjustment bolt for adjusting the angle of the mirror 11. The adjustment bolt 16 threadably passes through the pivoting member 8 and comes into contact with the rear surface of the reference surface 5.
Further, a spring 17 is interposed between the rear surface of the reference surface 5 at the contact portion of the tip of the adjustment bolt 16 and the front surface of the swinging member 8, and presses the swinging member 8 backward.

Since the present invention has the structure as described above, the laser light passing through one laser beam path tube 2 is transmitted to the mirror 1.
1, the laser beam is refracted and reflected and passed through the other laser beam path tube 2. Adjustment of the laser optical axis that is refracted and reflected by the mirror 11 is achieved by rotating the adjusting bolt 16 left and right, so that the rear convex spherical surface 10 of the rotating member 8 swings following the concave spherical surface 7 of the mounting member 6, and the mirror 11 obtained by adjusting the angle of To check the alignment of the laser optical axis that has been refracted and reflected by the previous mirror, loosen the bolt 18 and remove the mirror holder 20 including the sheet member 4, mounting member 6, and rotating member 8 from the mirror block 1. This is done by inserting a gauge (not shown) into the optical path. At this time, there is no need to loosen the adjustment bolt 16. After the alignment is confirmed, the mirror holder 20 is positioned and fixed to the mirror block 1 at the original position using the pilot part 3 and the reference surface 5.

Furthermore, when replacing the mirror 11, the mirror 11 can be replaced from behind the rotating member 8 by removing the mirror holder 12 and pulling out the cooling water block 13 from the rotating member 8.

<Effect of the invention> As described above, according to the invention, since the convex spherical surface of the rotating member and the concave spherical surface of the mounting member are formed on the side opposite to the seat member, it is difficult to widen the concave spherical surface with the adjustment bolt. The force applied to the mirror block does not act on the mounting surface of the seat member to the mirror block, the seat member can be removed from the mirror block without loosening the adjustment bolt, and the seat member, the rotating member, and the mounting member form one set. Since the rotating member can be attached to and removed from the seat member, the orientation of the rotating member can be accurately reproduced in a short time. Furthermore, since the mirror has better accessibility to the mirror block, it is possible to easily form an optical path in the mirror block. Furthermore, since the mirror can be replaced from the rear of the rotating member, it can be easily replaced without removing the mounting member from the mirror block.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional technique. DESCRIPTION OF SYMBOLS 1...Mirror block, 5...Reference surface, 6...Mounting member, 7...Concave spherical surface, 8...Swivel member, 9...Locking portion, 10...Convex spherical surface, 11...Mirror, 12...
...Mirror presser, 16...adjustment bolt.

Claims (1)

[Scope of utility model registration request] A sheet member is positionably and removably attached to a mirror block forming two mutually intersecting optical paths, a cup-shaped attachment member is attached to this sheet member so that the bottom is on the opposite side of the sheet member, and this attachment is performed. A window is formed at the bottom of the member, and a concave spherical surface is formed around the window, and a rotating member having a convex spherical surface is slidably fitted to the concave spherical surface, and the angle formed by the two optical paths is equal to 2. A through hole is formed in the rotating member on the dividing line, a front locking part is provided in the rotating member to lock the front surface of the mirror fitted in the through hole on the sheet member side, and the mirror is pressed against the front locking part. Screw the mirror holder into the through hole of the rotating member through the window of the mounting member, screw a plurality of adjustment bolts to the rotating member in parallel with the through holes, and connect one end of these adjusting bolts to the seat member. 1. A mirror holder with a tilting mechanism, characterized in that a spring is inserted between the seat member and the pivoting member, the spring being brought into contact with each other and the other end thereof is projected to the outside on the window side via a mounting member, and pressing a convex spherical surface against a concave spherical surface.