| 摘要 |
PROBLEM TO BE SOLVED: To enable the fastening with the accurate fastening force while securely receiving the reaction force by providing a pin or a hole in a body to be fastened, and connecting reaction force transmitting bodies having a hole or a pin to be fitted in/on the pin or the hole of the body to be fastened to a fastening tool. SOLUTION: A steel tube column 12 is placed on a steel tube column 11, and guide pins 51, 52 are threaded for standing on a cover body 121 of the steel tube column 12, and a nut fastening socket 6 holding a nut 31 at a lower part thereof is inserted from an insertion hole of the cover body 121 so as to thread the nut 31 with a bolt 3. Reaction force transmitting bodies 71, 72 of a motor driven wrench 7 are fitted on the pins 51, 52, and the rotary wrench 7 is fitted in a socket 6, and the wrench 7 is rotated. Since the pins 51, 52 and the holes of the reaction force transmitting elements 71, 72 are fitted to each other, the reaction force transmitting bodies 71, 72 and the cover body 121 securely receive the reaction force of the fastening force of the wrench 7, and the nut 31 is fastened by the accurate fastening force so as to securely fasten the bolt 3 to cover bodies 111, 122 for fixation. With this structure, a fastening device can be fastened to a body to be fastened with the accurate set fastening force without applying a burden to a worker.
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