| 摘要 |
<p>PROBLEM TO BE SOLVED: To very easily fix a piece and significantly reduce an assembly cost. SOLUTION: The piece 7 has a pair of locking pawls 10 locking to an inner rim of an oblong hole 6 and flanges 11 sitting in an outer rim of the oblong hole 6 in axial both end parts of the piece 7. An interval between the locking pawl 10 and the flange 11 of the piece 7 is slightly larger than thickness A of a nut, and it is A+δ. Since the piece 7 is composed in such a way, when the piece 7 is fit in the oblong hole 6 of the nut 2 from the outside, the piece 7 is positioned by snapping the locking pawls 10 on to the inner rim of the oblong hole 6 and seating the flanges 11 on step parts 9 of the outer rim of the oblong 6, and detachment of the piece 7 is prevented.</p> |
