Title:
METAL WASHER AND FASTENING STRUCTURE
Document Type and Number:
Japanese Patent JP2016133197
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a metal washer surely preventing corotation, and capable of preventing reaction force from a fastening tool from being transmitted to a worker.SOLUTION: A metal washer 1 has an engagement part 12 configured to be able to engage with an outer case 43 of a fastening tool 4, and on the side of a contact surface 13, provided is a bitten projection 14 bitten into a steel material 51 with axial force from a nut 3 in fastening due to the fastening tool 4. Then, at a portion where the bitten projection 14 of the metal washer 1 is bitten into the steel material 51 in a case of fastening the nut 3 and the steel material 51, provided is a pressure-welding part pressure-welded with the steel material 51.SELECTED DRAWING: Figure 1
Inventors:
MURAKAMI HIROSHI
Application Number:
JP2015009634A
Publication Date:
July 25, 2016
Filing Date:
January 21, 2015
Export Citation:
Assignee:
TOYO HATSUJO KOGYO KK
International Classes:
F16B43/00; B25B21/00; F16B5/02; F16B39/24
Domestic Patent References:
| JP2001088045A | 2001-04-03 | |||
| JPH09170616A | 1997-06-30 | |||
| JP2002181026A | 2002-06-26 | |||
| JPS6289515U | 1987-06-08 | |||
| JPS60167226U | 1985-11-06 | |||
| JP2000110816A | 2000-04-18 |
Attorney, Agent or Firm:
Maeda patent office