| 摘要 |
PROBLEM TO BE SOLVED: To provide a robot arm which moves up or down a driver for tightening a screw disposed in a terminal board while rotating the driver and has a compact structure.SOLUTION: A robot arm 14 comprises: a driver 20 for tightening a screw S disposed on a terminal board T; a lower driver shaft 44 to which the driver 20 is attached; an upper driver shaft 42 attached to an upper end part of the lower driver shaft 44; and driver rotation means 22 which rotates the upper driver shaft 42. A cylindrical part 43, in which the upper end part of the lower driver shaft 44 is fitted, is formed in a lower end part of the upper driver shaft 42. An long hole 66 extending in a vertical direction is formed in the cylindrical part 43. A protruding part 68 which fits in the long hole 66 is formed on a side surface of the upper end part of the lower driver shaft 44. The above object is achieved by the structure.SELECTED DRAWING: Figure 3 |
