| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tightening jig of a bolt with a polygonal hole, which enables work in a narrow space and has a tightening-forgetting prevention function of the bolt with the polygonal hole. <P>SOLUTION: The tightening jig 11 of the bolt with the polygonal hole comprises: a shaft 12 whose tip 12a is fit into a polygonal hole 3 of the bolt 1 with the polygonal hole; a cover 14 rotatably fit into the shaft 12 so as to be movable in the axial direction; and a marking member 15 arranged at the cover 14. The cover 14 is axially moved to the shaft 12 and the marking member 15 is made to abut on a head 2 of the bolt 1 with the polygonal hole while the shaft 12 is fit into the polygonal hole 3 of the bolt 1 with the polygonal hole, the shaft 12 is rotated so that the cover 14 may not be rotated in this state, and thus a mark is applied to the head 2 of the bolt 1 with the polygonal hole by the marking member 15. <P>COPYRIGHT: (C)2013,JPO&INPIT |
