Title:
WASHER, NUT, BOLT, NUT WITH WASHER AND BOLT WITH WASHER
Document Type and Number:
Japanese Patent JP2017110787
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent looseness of either a bolt or a nut.SOLUTION: Many washer protrusions 6 are arranged in a radial manner in a surface peripheral direction at a washer, the washer protrusions can be engaged with many head protrusions formed in a radial manner in a peripheral direction of either a head part rear surface of a nut or a head part rear surface of a bolt. After fastening of either the nut or the bolt, a washer 1 causes the engaged state to be hardly loosened or not to be loosened. The washer protrusions 6 have a mountain-shape in which a raising crossing part of a riding-over slant surface 9, an engaging surface and both surfaces have a ridge line part 11 and a descending crossing part has a valley part. The riding-over slant surface is placed before a fastening rotation direction of either a nut or a bolt, the engaging surface is placed after the fastening rotating direction of either the nut or the bolt than the ridge line part, and the washer has the ridge line part 11 and the valley 12 that are circular-arc in shape.SELECTED DRAWING: Figure 1
Inventors:
NAKAJIMA KAZUO
Application Number:
JP2015247527A
Publication Date:
June 22, 2017
Filing Date:
December 18, 2015
Export Citation:
Assignee:
NAKAJIMA KAZUO
MARUNAKA:KK
MARUNAKA:KK
International Classes:
F16B35/00; F16B39/26; F16B39/28; F16B39/282; F16B43/00
Domestic Patent References:
| JP2011038596A | 2011-02-24 | |||
| JP2015072056A | 2015-04-16 | |||
| JPS6386103U | 1988-06-06 | |||
| JPH05506708A | 1993-09-30 | |||
| JPH09170616A | 1997-06-30 |
Foreign References:
| WO2015118669A1 | 2015-08-13 | |||
| WO2015060425A1 | 2015-04-30 |
Attorney, Agent or Firm:
Masaharu Kobayashi
Masahide Kobayashi
Masahide Kobayashi