| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation mechanism of a laser setting-out apparatus that dispenses with a recovery operation required for a conventional art and can be used immediately after power-on.SOLUTION: A planetary gear 48 is meshed with both of a sun gear 44 driven by first driving means 52 and an internal gear 46 driven by second driving means 58, thereby holding the planetary gear 48 with a holding plate 50. In response to rotation of the holding plate 50, a laser irradiator 16 for emitting a laser beam 12 is rotated. When the laser irradiator 16 is rotated, one of the first driving means 52 and second driving means 58 is operated to rotate the laser irradiator 16 at a high rotation speed or a low rotation speed for fine adjustment. |
