| 摘要 |
PROBLEM TO BE SOLVED: To attach/detach a bolt or a nut in a lace in which an empty space in the axial direction of the bolt or the nut to be attached/detached is limited. SOLUTION: In a socket for rotation in which a socket (13) for bolt and nut to allow a bolt head or a nut to be fitted is opened in one end, and a socket (19) for a transmission projection to allow a transmission projection (17) of a rotating means (15) is opened in the other end, the socket for the transmission projection has the same section corresponding to the transmission projection over the entire length in the axial direction of the socket for the transmission projection, and the length in the axial direction of the socket for rotation is reduced by opening the entire surface of the end on the socket side for bolt and nut at the socket for the transmission projection in the socket for bolt and nut.
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