| 摘要 |
PROBLEM TO BE SOLVED: To improve workability and use a wrench even in a narrow space. SOLUTION: A latchet device 51A is provided with a socket attaching portion 500, a pawl member 530 and a ratchet wheel 560 for transmitting rotation of the socket attaching portion 500 in only one direction. By holding a grip lever 420 swingably supported by a grip 420, and operating it, a transmission shaft 31 is moved through a transmission shaft driving means 430A. Movement of the transmission shaft 31 is rotationally transmitted to the ratchet wheel 560 through a connecting member 311 and a link member 570.
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