| 摘要 |
PURPOSE:To transmit a laser light up to the robot tip with good accuracy without the shift of an optical axis by transmitting the laser light in the axial core direction of each driving shift of a robot and transmitting further co-axially with the axis center of a working shaft by the mirror fitted to the axis center. CONSTITUTION:The laser light made incident on the axis center at the lower part of a column 20 via a square hole 35 from a laser light source 2 is made incident on a mirror 4B by being reflected by a mirror 4A. It is further made incident on a mirror 4C via the axis center of a rotating shaft 22 and transmitted to a mirror 4D in the 1st arm 23. In this case, the mirror 4B is held on a shell part 21 even if the shell part 21 is rotated and since the mirror 4C is located at the rotating axis center of the 1st arm 23 fitted via the rotating shaft 22 supported on this shell part 21 the laser optical axis between each other does not be shifted. The laser light is similarily transmitted to 4K from 4E, condensed between tips 8, 9 by a condensing mirror 6 and subjected to a spot welding. |
