ROTATION PREVENTING DEVICE FOR SCREW COMPONENT, AND RAILROAD VEHICLE AUXILIARY POWER SOURCE DEVICE TO WHICH COMPONENT IS INSTALLED USING THE DEVICE

摘要

A conventional device for preventing rotation of a bolt is made for a case where the device can be operated from both the bolt side and the nut side. It has been therefore impossible to fasten the bolt and nut together at a place where the device can be operated only from one side and to apply loosening prevention to the bolt. A rotation prevention device of this invention has a body section (7B) having a shaft, on the outer surface of which shaft an external thread is provided, and having a through-hole (7A), through which the shaft of a screw component (4) with a head (4A) with a greater diameter than the shaft can pass and which has a smaller diameter than the head; an engagement section (7C) engaging with the side surface of either a member (2) to be installed or a member (3) on which installation is made; and a head hold-down section (7D) fixed to the body section (7B) so as to clasp and fasten, between the head hold-down section and the body section (7B), the head (4A) of the screw component (4). ® KIPO & WIPO 2007