| 摘要 |
In the present invention, even without using a special bolt, it is possible to reliably prevent the mistaken falling off of a nut. A nut (10) is constituted by a nut body (11) and a pressure-contact member (20) which is elastic. The pressure-contact member (20) includes, in the center thereof, a through hole (21) having a diameter (L1) which is only slightly smaller than the valley diameter (=the peak diameter of a male screw section (3) of a bolt (1)) (L) of a female screw section (13). The pressure-contact member (20) is attached, using an adhesive, to an end face (14) which is in the nut body (11), to which a female screw hole (12) opens and which is on the bottom-surface side, so that the through hole (21) and the female screw section (13) are aligned to be coaxial (concentric). The thickness (H) of the pressure-contact member (20) is, for example, approximately 1-5 times the distance between adjacent screw peaks of the female screw section (13). Because the pressure-contact member (20) is elastically deformable, the through hole (21) can pass-over the bolt distal-end section (4) in the axial direction. When the nut (10) is attached to the bolt (1) from the bottom-surface side of the nut, before the female screw section (13) of the nut (10) makes contact with the distal end of the bolt (1), the through hole (21) of the pressure-contact member (20) is pressed open by the distal end of the bolt (1) and is thereby put into a state of pressure contact. |
