Title:
SQUARE WASHER AND FASTENING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2024/057512
Kind Code:
A1
Abstract:
[Problem] To prevent by means of a simple configuration unintended rotation of a square washer induced by another member. [Solution] This square washer is used in a state of being sandwiched between an attachment surface Sa of an attachment subject S and a nut 2 or the head of a bolt. A washer body 1A has a polygonal shape when viewed from a direction orthogonal to the surface facing a nut 2, and a central concave portion 1Aa is formed on the side facing the attachment surface Sa. The outer shape of the central concave portion 1Aa is formed so as to be the same as that of the nut 2 or the head of the bolt, or so as to be larger than the outer shape of the nut 2 or the head of the bolt, and the washer body 1A has elasticity such that a central portion of the washer body 1A is displaced toward the attachment surface Sa when fastened by the nut 2 or the head of the bolt.
Inventors:
SAEKI HIROSHI (JP)
Application Number:
PCT/JP2022/034669
Publication Date:
March 21, 2024
Filing Date:
September 16, 2022
Export Citation:
Assignee:
NIPPON PLARAD CO (JP)
International Classes:
F16B43/00
Foreign References:
| JPS5323862U | 1978-02-28 | |||
| JPH10311324A | 1998-11-24 | |||
| JP2021179250A | 2021-11-18 | |||
| JPH10184653A | 1998-07-14 |
Attorney, Agent or Firm:
TORISU Minoru et al. (JP)
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