UNLOCK MEMBER MOUNTED IN LOCK NUT WITH COIL SPRING, FASTENING METHOD AND UNFASTENING METHOD FOR LOCK NUT WITH THE UNLOCK MEMBER MOUNTED THEREIN

摘要

PROBLEM TO BE SOLVED: To improve unfastening workability and threading workability of a lock nut.;SOLUTION: The present invention relates to an unlock member 1 that can be mounted in a lock nut 10 configured by disposing a coil spring 11 that can be threaded with a male screw 100 in a nut body 12. The coil spring 11 includes: a threading part 11b that is molded in a spiral shape; a whirl-stop end 11a which defines one end of the threading part 11b and is fixed and supported in the nut body 12 in such a manner that rotation of the threading part 11b is regulated; and a free end 11c which can be freely elastically deformed in a bidirectional manner to enlarge or reduce a diameter of the threading part 11b and is disposed so as to be freely loosely fitted to the nut body 12. The nut body 12 consists of: a fixing part 12c defining a mounting position of the whirl-stop end 11a; and an operation part 14 configured by disposing the free end 11c so as to be freely loosely fitted in the bidirectional manner. The unlock member 1 is mounted in the operation part 14, thereby being elastically deforming the threading part 11b in the diameter enlarging direction.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2018,JPO&INPIT