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Patent Searching and Data


Title:
LOOSENESS PREVENTION STRUCTURE OF BOLT AND NUT
Document Type and Number:
Japanese Patent JP2015021595
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a looseness prevention structure of a bolt and not, capable of ensuring looseness prevention performance without complicating a manufacturing process.SOLUTION: An engagement projection 10B is formed on the bottom of a male screw 10A of a bolt 10. An elastic engagement claw 20 is provided on the top surface side of a nut 11. The engagement claw on the nut side is elastically deformed in fastening the bolt and nut, and thereby relative rotation of the bolt and nut is allowed to get over the engagement projection on the bolt side. While, the engagement claw on the nut side is engaged to the engagement projection on the bolt side in rotating in the looseness direction of the bolt and nut, and thereby relative rotation in the looseness direction of the bolt and nut is inhibited.

Inventors:
HAMANAKA SHIGENOBU
Application Number:
JP2013152187A
Publication Date:
February 02, 2015
Filing Date:
July 23, 2013
Export Citation:
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Assignee:
HAMANAKA NUT CO LTD
International Classes:
F16B39/30; F16B25/04; F16B39/02
Domestic Patent References:
JPH06249222A1994-09-06
JPH05332336A1993-12-14
JP2011052767A2011-03-17
JPS4013692Y1
Attorney, Agent or Firm:
Hisao Ishii