| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable lock washer securely locking. SOLUTION: An outer circumferential part 1A has a flat part, and a center circumferential part 1X has a hole for inserting a male screw. An intermediate circumferential part sandwiched between the center circumferential part and the outer circumferential part is divided into two or more by a notch 1Y and a locking piece notch. A fan-like divided part 1B is formed to be a shape of a cone. Further, an end of the cone part in the opposite direction of the nut fastening direction is folded to provide a lock washer locking piece. When the lock washer is used, it fastens a hexagonal nut, and the divided part 1B formed in a cone shape generates elastic repulsion. When the washer fastens the hexagonal nut, it fastens while straddling the lock washer locking piece. When intense vibration and impact are applied, and when the hexagonal nut is loosened to move in the rotational direction, frictional force caused by the elastic repulsion of a disc spring shaped cone and a lock washer locking corner part biting the hexagonal nut prevent loosening rotation to maintain strength of a structure. COPYRIGHT: (C)2011,JPO&INPIT
|
