Title:
WASHER FASTENING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2020/261605
Kind Code:
A1
Abstract:
The present invention optimizes a washer and a washer fastening structure such that a force is mostly oriented toward the opening side of a nut by guiding the position of the force applied onto the nut toward the outer circumferential side of a nut bearing surface and, consequently, reduces a load on the first thread where the bolt and nut are fastened and become engaged. A washer according to the present invention has a washer body and a bolt hole that passes through the washer body, the washer having, in the vertical cross-section thereof, a stress non-transmitting space that opens toward the bolt hole and that extends in the radial direction of the bolt hole, and the stress non-transmitting space having a concentric annular shape centered on the axis of the bolt hole.
Inventors:
MATSUO MAKOTO (JP)
HAYASHIDA TATSUAKI (JP)
IWAMOTO YOSHINAO (JP)
HAYASHIDA TATSUAKI (JP)
IWAMOTO YOSHINAO (JP)
Application Number:
PCT/JP2019/049481
Publication Date:
December 30, 2020
Filing Date:
December 17, 2019
Export Citation:
Assignee:
MATSUO IND CORPORATIONS (JP)
IMOTT INC (JP)
IMOTT INC (JP)
International Classes:
F16B31/06; F16B43/00
Foreign References:
| JPH07167129A | 1995-07-04 | |||
| JPH0225710U | 1990-02-20 | |||
| JP2002089535A | 2002-03-27 | |||
| JP2018054013A | 2018-04-05 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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