Title:
BOLT/NUT FASTENING STRUCTURE AND NUT WITH RETURN STOP MECHANISM
Document Type and Number:
Japanese Patent JP2022046940
Kind Code:
A
Abstract:
To provide a bolt/nut fastening structure which can easily release tightening when the necessity for releasing the tightening arises, and can reuse a bolt and a nut as much as possible.SOLUTION: A ratchet wheel part 20 having an outer tooth ratchet wheel 22 of a bolt 2a is arranged, an inner tooth ratchet wheel part 11 composed of four divided parts 15 which are divided by a slit 13 having an inner tooth ratchet wheel 16 engaged with an outer tooth ratchet wheel 22 is arranged at one side of a return stop nut 1a, a fastening nut 3 is screwed to a male screw part 21 at the bolt 2a, a fastening object 5 is fastened between a head part 23 and the fastening nut 3 via washers 4, 4, and on the other hand, the return stop nut 1a is screwed to a male screw part 32 of the fastening nut 3, thus preventing the loosening of the fastening nut 3 by making the outer tooth ratchet wheel 22 and the inner tooth ratchet wheel 16 engaged with each other. The engagement is released by elastically deforming the divided part 14 to the outside, and the screwing of the nut 1a with the return stop mechanism can be easily released.SELECTED DRAWING: Figure 1
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Inventors:
HAZAMA MASAYA
TAKEDA MAKOTO
YOKOI SHINICHI
YOKOI YOJI
TAKAHASHI NOBORU
OKADA KOICHIRO
KATSUMA HIROSHI
TAKEDA MAKOTO
YOKOI SHINICHI
YOKOI YOJI
TAKAHASHI NOBORU
OKADA KOICHIRO
KATSUMA HIROSHI
Application Number:
JP2020152590A
Publication Date:
March 24, 2022
Filing Date:
September 11, 2020
Export Citation:
Assignee:
KURIMOTO LTD
YOKOI SEISAKUSHO KK
HINOMARU GOSEI JUSHI KOGYO KK
YOKOI SEISAKUSHO KK
HINOMARU GOSEI JUSHI KOGYO KK
International Classes:
F16B39/284; F16B35/00; F16B37/00
Domestic Patent References:
| JPS5412125Y2 | 1979-05-29 | |||
| JPH07197925A | 1995-08-01 | |||
| JPS54105358U | 1979-07-25 |
Foreign References:
| DE1775091A1 | 1971-06-09 | |||
| FR490365A | 1919-04-19 |
Attorney, Agent or Firm:
Katsunori Sugimoto
Tadayuki Tsuji
Kiyotaka Ano
Tadayuki Tsuji
Kiyotaka Ano