| 摘要 |
<p>The present invention prevents loosening in a screw attachment structure that does not use a nut. The screw (3) is provided with a screw head (31) having a tapered surface on the outer circumferential surface and a threaded shaft (33). The shaft center (O) of the outer circumferential surface of the screw head (31) is eccentric with respect to the shaft center (P) of the threaded shaft (33). A frame (1) is provided with a fitting hole (13) having a tapered surface on the inner circumferential surface and a threaded hole (14). When the screw head (31) of the screw shaft is fitted inside the fitting hole (13) so as to be in contact over the entire circumference, the shaft center (P) of the threaded shaft (33) is screwed eccentrically with respect to the shaft center of the threaded hole (14) and loosening is prevented.</p> |
