Title:
緩み止めボルト及びその製造方法
Document Type and Number:
Japanese Patent JP7011852
Kind Code:
B2
Abstract:
To make a female screw and a male screw of a looseness preventing ring closely adhere to each other in not only load side flanks but also loose side flanks, to exhibit large looseness preventing action stably.SOLUTION: On the outer periphery of a looseness preventing ring 4 mounted in a middle part of a bolt shaft part 2 in an axial direction, a male screw 4a continuous with a male screw 2a of the bolt shaft part 2 is formed. The male screw 4a of the looseness preventing ring 4 has a larger screw diameter than the male screw 2a of the bolt shaft part 2. The male screw (4a) of the looseness preventing ring 4 can elastically deform so that it is in close contact with a female screw 5a to which the bolt shaft part 2 is screwed on both a loose side flank and a load side flank.SELECTED DRAWING: Figure 1
Inventors:
Katsuhiko Wakabayashi
Application Number:
JP2020055756A
Publication Date:
January 27, 2022
Filing Date:
March 26, 2020
Export Citation:
Assignee:
Hardlock Industry Co., Ltd.
International Classes:
F16B39/34; B21H3/06; F16B35/00
Domestic Patent References:
| JP54130164U |
Foreign References:
| GB566254A | ||||
| US3414034 | ||||
| US3478800 |
Attorney, Agent or Firm:
Hidetoshi Ueba
Taro Murakami
Taro Murakami