Fastening Tool
AssigneePate.To Co., Ltd
InventorYonefusa UCHIDA
Life of this patent
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Abstract
The present invention relates to a fastening tool. The fastening tool of the present invention includes: a male screw-side member having a screw portion the screw portion being formed by alternately arranging, in an outer peripheral direction, male screw surfaces where male screw-side screw threads are formed and outer peripheral pieces where the male screw-side screw threads are not formed; and a female screw-side member having a screw hole, the screw hole being formed by alternately arranging, in an inner peripheral direction, female screw surfaces where female screw-side screw threads are formed and inner peripheral pieces where the female screw-side screw threads are not formed, the screw hole allowing the male screw surfaces and the female screw surfaces to be threadedly engaged with each other.
Claims7
A fastening tool comprising:
- a male screw-side member having a screw portion, the screw portion being formed by alternately arranging, in an outer peripheral direction, a male screw surface where male screw-side screw threads are formed and an outer peripheral piece where the male screw-side screw threads are not formed;
- a female screw-side member having a screw hole, the screw hole being formed by alternately arranging, in an inner peripheral direction, a female screw surface where female screw-side screw threads are formed and an inner peripheral piece where the female screw-side screw threads are not formed, the screw hole allowing the male screw surface and the female screw surface to be threadedly engaged with each other;
- and
- a locking portion formed in the screw portion and the screw hole so as to lock a relative rotation between the screw portion and the screw hole in a thread engagement state between the male screw surface and the female screw surface,
- the locking portion including
- a protruding portion that is formed on either the male screw-side screw thread or the female screw-side screw thread, and
- a recessed portion that is formed on the male or female screw-side screw thread that the protruding portion is not formed, the protruding portion being fitted into the recessed portion in the thread engagement state.
Dependencies are inferred from the claim text.