| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-end threaded body having a right-handed thread and a left-handed thread on the circumferential surface of one solid member, and also a single-nut or a double-nut internally-threaded body which is not substantially loosened and exhibits a locking effect even at an intermediate position by using a double-end externally-threaded body and one or more internally-threaded bodies in combination. SOLUTION: This double-end externally-threaded body 1 has an overlap region where a spiral and clockwise right-handed screw 20, and a spiral and counterclockwise left-handed screw 30 are so provided as to overlap at least partially on the outer circumferential surface of a rod-like member. Further, a right-handed internally-threaded body with the right-handed screw formed therein or a left-handed internally-threaded body with the left-handed screw formed therein, which is screwed to a double-end externally-threaded body, can be used, or both the internally-threaded bodies can be used in combination. COPYRIGHT: (C)2011,JPO&INPIT |
