Title:
緩み止め機能を有するねじ締結構造
Document Type and Number:
Japanese Patent JP6996747
Kind Code:
B2
Abstract:
A novel screw-fastening assembly having anti-loosening capabilities includes a first and a second screw elements 11,12 adapted to be screw-fastened; the element 12 includes a recess R, the recess being open toward the element 11; and the element 11 includes an protrusion P, the protrusion being introduced into the recess R in a fastened state. The recess R has an inner peripheral surface formed in a cylindrical shape that is straight along the axial direction. The protrusion P is shaped as a circular column or cylinder having a maximum-diameter portion at one location along the axial direction. The protrusion P and the recess R are eccentric relative to each other such that the maximum-diameter portion of the protrusion and the inner peripheral surface of the recess are in pressure contact only along part of their circumference in the fastened state. The maximum-diameter portion is spaced apart from the base end of the protrusion P by a predetermined distance so as to allow the protrusion to move forward and backward along the axial direction relative to the recess R with the maximum-diameter portion being in pressure contact with the inner peripheral surface of the recess R only along part of their circumference.
Inventors:
Katsuhiko Wakabayashi
Application Number:
JP2018162388A
Publication Date:
January 17, 2022
Filing Date:
August 31, 2018
Export Citation:
Assignee:
Hardlock Industry Co., Ltd.
International Classes:
F16B39/28; A61C8/00
Domestic Patent References:
| JP2012110922A | ||||
| JP10037936A | ||||
| JP9236109A |
Foreign References:
| WO2016111312A1 |
Attorney, Agent or Firm:
Hidetoshi Ueba
Taro Murakami
Taro Murakami
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