| 摘要 |
PROBLEM TO BE SOLVED: To provide a safer lock nut improving the fastening performance of a bolt and the nut and facilitating removal. SOLUTION: The safer lock nut includes: a nut 300 having a hexagonal nut portion 310 having a threaded hole 320 in a center thereof into which a threaded shaft 210 is fastened, a round nut portion 330 integrally extending from the top face of the hexagonal nut portion and having in the inside a recessed portion 340 of an inner diameter larger than that of the threaded hole, a winding portion 350 having a stepped surface 360 on the top face of the recessed portion, and a guiding long hole 370 brought into communication with the recessed portion at one side of the bottom of the round nut portion; and a coil spring 400 having a coil portion 410 inserted in the recessed portion of the round nut portion and having tension force, a top coil portion 430 extending to the top of the coil portion, placed on the stepped surface, fixed and coupled in a state of being wound by the winding portion, and a bent end portion 440 which is an end of the bottom of the coil portion and is bent outward so as to pass through the guiding long hole. COPYRIGHT: (C)2011,JPO&INPIT
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