| 摘要 |
PURPOSE:To easily transmit a laser beam by forming the diameter of an optical fiber at a laser beam receiving part larger than that of an optical fiber at a laser beam irradiation part. CONSTITUTION:When an upper turret 17 is rotated and a laser beam machining head 41 is positioned on the lower position of a striker 21, the laser beam receiving part 65 provided on the upper turret 17 and the laser beam irradiation part 67 provided on the frame side are opposed to each other and the laser beam irradiating from the irradiation part 67 is guided to the laser beam machining head 41 via the laser beam receiving part 65. At this time, since the diameter of the optical fiber 63 at the laser beam receiving part 65 is formed larger than that of the optical fiber 75 at the laser beam irradiation pat 67, the laser beam can be easily transmitted. In addition, since these are connected with each other via the flexible fibers, respectively, the constitution of an optical path of the laser beam can be simplified without causing deviation in alignment of the optical path. |
