Title:
SCREW FASTENING BODY AND LOOSENING DETECTION METHOD OF SCREW FASTENING BODY
Document Type and Number:
Japanese Patent JP2019138459
Kind Code:
A
Abstract:
To provide a screw fastening body which is easy in the monitoring and detection of loosening, and a loosening detection method of the screw fastening body.SOLUTION: In a screw fastening body in which a screw component 1 is fastened to a fastened body 2, an auxiliary member 8 in which an undercoating layer 3 containing a fluorescent pigment which emits light by excitation light is formed is interposed at a joining part between the screw component 1 and the fastened body 2, and a top coat layer 4 containing a light shielding agent for blocking the permeation of the excitation light is formed at an outer edge of the joining part between the screw component 1 and the fastened body 2 interposed with the auxiliary member 8. A loosening detection method of the fastened body radiates the excitation light 6 to the screw fastening body, and makes the undercoat layer 3 emit light through cracks 5 generated at the top coat layer 4.SELECTED DRAWING: Figure 4
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Inventors:
TAKAHASHI KOICHI
Application Number:
JP2018035798A
Publication Date:
August 22, 2019
Filing Date:
February 09, 2018
Export Citation:
Assignee:
TAKAHASHI KOICHI
International Classes:
F16B31/02
Domestic Patent References:
| JP2015025477A | 2015-02-05 | |||
| JP5085800B1 | 2012-11-28 |
Attorney, Agent or Firm:
Toyoaki Eguchi