Title:
BOLT-NUT LOCKING STRUCTURE
Document Type and Number:
Japanese Patent JP2015017659
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a bolt-nut locking structure capable of surely performing locking without increasing the number of components and increasing manufacturing costs.SOLUTION: A bearing surface of a nut 11 is provided with a plurality of engagement portions 11A having inclined planes 11B and rotation inhibiting portions 11C, in a state of being arranged in the circumferential direction of the nut bearing surface, a surface of a washer 12 is provided with an elastically-deformable locking projection 12A. The locking projection gets over the rotation inhibiting portion of the nut by being guided and elastically deformed by the inclined plane of the engagement portion of the nut with respect to the rotation in the screwing direction of the bolt, and is brought into contact with the rotation inhibiting portion of the engagement portion of the nut with respect to the rotation in the unscrewing direction of the bolt. A locking recessed groove 10C is formed on a bolt shaft portion 10B in a state of being axially extended, and a locking projection 12D fitted to the locking recessed groove to lock the washer to the bolt shaft portion, is formed on an inner edge of a bolt insertion hole of the washer.
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Inventors:
HAMANAKA SHIGENOBU
Application Number:
JP2013145104A
Publication Date:
January 29, 2015
Filing Date:
July 11, 2013
Export Citation:
Assignee:
HAMANAKA NUT CO LTD
International Classes:
F16B39/24; F16B39/282; F16B43/00
Domestic Patent References:
| JP2012511671A | 2012-05-24 | |||
| JP2011220387A | 2011-11-04 | |||
| JP2002031120A | 2002-01-31 |
Attorney, Agent or Firm:
Hisao Ishii