| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a smooth and efficient welding work possible as it does not require to stop the welding line even when a trouble occurs in a part of laser oscillators. SOLUTION: The device is equipped with the first laser oscillator 14 to irradiate a laser beam L1 against a right door 12, and the second oscillator 18 to irradiate a laser beam L2 against a left door 16. Also, the 1st-4th optical path change systems 34, 36, 38, and 40 are equipped to change the optical path of the laser beam L1 on one side from the first oscillator 14 when the second oscillator 18 is stopped, and to change the optical path of the laser beam L2 as well from the second oscillator 18 when the first laser oscillator 14 is stopped.</p> |
