Title:
LOOSENING PREVENTION DEVICE
Document Type and Number:
Japanese Patent JP2021099156
Kind Code:
A
Abstract:
To reduce the amount of inclination of a nut 20 with respect to a nut 10 in a fastened state in a loosening prevention device in which a loosening prevention effect is produced by eccentric fitting of a protruding part 12 of the nut 10 and a recessed part 22 of the nut 20.SOLUTION: The outer-circumferential surface of the protruding part 12 and the inner-circumferential surface of a recessed part 22 are configured such that, although a tapered outer-circumferential surface portion 12a of the protruding part 12 interferes with a tapered inner-circumferential surface portion 22a of the recessed part 22 in a portion in the circumferential direction when the protruding part 12 of the nut 10 threaded onto a threaded shaft S and the recessed part 22 of the nut 20 threaded onto the threaded shaft S are in an eccentric fitting state, a gap is formed between a leading-end outer-circumferential surface portion 12b of the protruding part 12 and a base-side inner-circumferential surface portion 22b of the recessed part 22 along the entire circumference.SELECTED DRAWING: Figure 1
Inventors:
WAKABAYASHI KATSUHIKO
Application Number:
JP2020095587A
Publication Date:
July 01, 2021
Filing Date:
June 01, 2020
Export Citation:
Assignee:
HARD LOCK IND CO LTD
International Classes:
F16B39/18
Attorney, Agent or Firm:
Hidetoshi Ueba
Taro Murakami
Taro Murakami