Title:
締結構造体
Document Type and Number:
Japanese Patent JP7222555
Kind Code:
B2
Abstract:
To provide a fastening structure capable of obtaining proper locking effect.SOLUTION: A fastening structure S1 includes: a bolt 3 having a male screw portion 3b; a nut 4 with a recessed portion, having a female screw portion: and a spring washer 7 used in a state of being inserted to the male screw portion 3b of the bolt 3. The spring washer 7 has a claw portion 9 having a moderate slope in a direction a to fasten the nut and a steep slope in a direction b to loosen the nut, near a cut area 7c formed by cutting a part of the spring washer on a face 7b on a side in contact with the nut 4 with the recessed portion. The nut 4 with the recessed portion has a recessed portion 4c having a moderate slope in the fastening direction a of the nut and a steep slope in the loosening direction b of the nut, on a face on a side in contact with the spring washer 7.SELECTED DRAWING: Figure 1
Inventors:
Taketomo Maeda
Application Number:
JP2020188588A
Publication Date:
February 15, 2023
Filing Date:
November 12, 2020
Export Citation:
Assignee:
Minsei Co., Ltd.
International Classes:
F16B39/24; F16B5/02; F16B43/00
Domestic Patent References:
| JP2016035315A | ||||
| JP55147522U |
Foreign References:
| CN2813975Y |
Attorney, Agent or Firm:
Hiroyuki Takamatsu