| 摘要 |
PROBLEM TO BE SOLVED: To make labor and time, which are required to eliminate a bite of a head part of a bolt or a nut into an inner peripheral wall of a recessed part of a socket, less than before.SOLUTION: When the bolt is fastened, a cam follower 25 on the left side is abutted on the lower end 7a of a block to regulate the turning of the socket 5 to the fastening direction. Meanwhile, when the fastening work of the bolt is completed, an abutting member 23 is moved upward by a moving means so that a cam follower 25 on the right side is abutted on the upper end 7b of the block to turn the socket 5 to the fastening direction so that the bite of the head part of the bolt 6b into the inner peripheral wall of a hexagonal hole 5a is eliminated. Since the bite can be eliminated by one step of moving the abutting member 23 upward in this manner, the labor and time can be made less than before. |
