Title:
FASTENING STRUCTURE
Document Type and Number:
Japanese Patent JP2021105444
Kind Code:
A
Abstract:
To provide an anti-loosening device that exhibits an anti-loosening effect by eccentric interdigitation of convex parts 22 of a nut 2 and concave parts 32 of a nut 3, and reduces an amount of inclination of the nut 3 relative to the nut 2 in a fastened state.SOLUTION: A fastening structure comprises: a bolt with a screw shaft 1 whose outer peripheral surface has an external thread; and a nut 3 with a screw hole 31 whose inner peripheral surface has an internal thread to be threadedly engaged with the external thread. At least one of a compression side flank face 31p of the external thread, a clearance side flank face 31c of the external thread, a compression side flank face 1p of the internal thread and a clearance side flank face 1c of the internal thread has a convex arc shape in a cross section along a shaft direction.SELECTED DRAWING: Figure 1
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Inventors:
WAKABAYASHI KATSUHIKO
Application Number:
JP2020095785A
Publication Date:
July 26, 2021
Filing Date:
June 01, 2020
Export Citation:
Assignee:
HARD LOCK IND CO LTD
International Classes:
F16B39/30; F16B39/18
Domestic Patent References:
| JP2001512807A | 2001-08-28 | |||
| JP2018100765A | 2018-06-28 | |||
| JPS51121651A | 1976-10-25 | |||
| JP2016038083A | 2016-03-22 | |||
| JPH07197924A | 1995-08-01 |
Foreign References:
| US1369156A | 1921-02-22 |
Attorney, Agent or Firm:
Hidetoshi Ueba
Taro Murakami
Taro Murakami