| 摘要 |
PROBLEM TO BE SOLVED: To make an operator uniquely recognize insufficient fastening torque of a fastening screw connecting a cable terminal to a terminal block, in order to prevent the occurence of failures such as heat generation on the terminal block together accompanied by connection failure of the cable terminal during a wiring operation in advance.SOLUTION: A restraining member is arranged between a conductive part of a terminal block and a fastening screw, and a part of the restraining member fixed to the cable terminal is formed to be a concave surface. Therefore, when fastening torque of the fastening screw reaches a predetermined value, an opening end of a follower piece of the restraining member is lowered near a swing fulcrum of a cover, so that the cover can be closed. When the fastening torque of the fastening screw does not reach the predetermined value, the opening end of the follower piece of the restraining member presses a rear surface of the cover, and is energized in a direction for avoiding closure of the cover, so that an operator can recognize that the fastening torque of the fastening screw is insufficient. |
