Title:
LOOSENESS DETECTION STRUCTURE, LOOSENESS DETECTION SYSTEM, AND LOOSENESS DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/090468
Kind Code:
A1
Abstract:
This looseness detection structure used to detect the looseness of a bolt comprises a material 11 that: is disposed between a steel plate 3 to be fixed and a head part 10a of a metallic bolt 10 for fixing the steel plate 3, is attached to a bearing surface of the head part 10a of the bolt 10 or to a metal washer 51 disposed between the steel plate 3 and the head part 10a of the bolt 10, and has an electrical characteristic that changes according to variation in the force with which the bolt 10 is fastened to the steel plate 3.
Inventors:
MATSUNAGA ERI (JP)
MINOTANI TADASHI (JP)
NAKAMURA MASAHITO (JP)
TSUDA MASAYUKI (JP)
MINOTANI TADASHI (JP)
NAKAMURA MASAHITO (JP)
TSUDA MASAYUKI (JP)
Application Number:
PCT/JP2019/043797
Publication Date:
May 14, 2021
Filing Date:
November 08, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01N22/00
Foreign References:
| JPS6039523A | 1985-03-01 | |||
| US20140190267A1 | 2014-07-10 | |||
| JP2014228465A | 2014-12-08 | |||
| JP2013210234A | 2013-10-10 | |||
| JPH03114031A | 1991-05-15 | |||
| JP2015025477A | 2015-02-05 |
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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