Title:
強度可変ボルト
Document Type and Number:
Japanese Patent JP7107289
Kind Code:
B2
Abstract:
To provide a strength varying fastener capable of reusing a fastening member by suppressing breakage of the fastening member itself even when operated so as to decrease fastening strength.SOLUTION: A strength varying fastener includes a fastening shaft part (a screw rod part) 20 provided with a fitting part (a male screw) 21 and a head 12 projecting the screw rod part, holds fastening members 1A, 1B laid over each other through the screw rod part between the head and the fitting tool (a nut) 70 fitted to the screw rod part, fastens them, controls them by a controller 10, and decreases fastening strength so as to be able to release fastening of the fastening members. The screw rod part is provided with: an outer peripheral side part 23 provided with a male screw; and a core material part 29 which is disposed in an outer peripheral side part so as to maintain strength of the outer peripheral side part and is movably disposed up to a release area RA releasing the arrangement area PA when the fastening members are fastened in the outer peripheral side part. In the head, moving means 38 whose operation is controlled by a controller and which moves the core material part to a release area is disposed.SELECTED DRAWING: Figure 1
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Inventors:
Taizo Suemitsu
Application Number:
JP2019151361A
Publication Date:
July 27, 2022
Filing Date:
August 21, 2019
Export Citation:
Assignee:
Toyoda Gosei Co., Ltd.
International Classes:
F16B31/00; B60R21/02; B62D25/00; F16B35/00
Domestic Patent References:
| JP45011123Y1 | ||||
| JP63177310U | ||||
| JP2009067065A |
Foreign References:
| US5402728 |
Attorney, Agent or Firm:
Akio Iida
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