Title:
ゆるみ防止金属製雄ねじ
Document Type and Number:
Japanese Patent JP6684312
Kind Code:
B2
Abstract:
[Problem] The purpose of the present invention is to provide an anti-loosening metallic male screw that can exhibit a sufficient anti-loosening effect by forming a flat part and a short slope in a part of the thread bottom of the male screw and thus ensuring pressure contact between a thread peak of a female screw and the slope at the thread bottom of the male screw. [Solution] An anti-loosening metallic male screw according to the present invention is to be engaged with a female screw for a metric screw, and is characterized in that the cross-sectional shape of the thread bottom of the metallic male screw is formed into a flat shape in which a non-pressurized flank side thereof is parallel to the axis of the male screw, is formed into a shape in which a pressurized flank side thereof is sloped toward the pressurized flank side with respect to an extension line of the flat part, and the outer diameter and the effective radial size of the metallic male screw are smaller than the reference sizes of the metric screw.
Inventors:
Suzuki Noriyuki
Hajikaro
Hajikaro
Application Number:
JP2018116109A
Publication Date:
April 22, 2020
Filing Date:
June 19, 2018
Export Citation:
Assignee:
Hachiman Screw Co., Ltd.
Limited company world lock
Limited company world lock
International Classes:
F16B39/30; F16B33/02
Domestic Patent References:
| JP2016524681A | ||||
| JP2014037893A |
Foreign References:
| US20170030393 | ||||
| WO2017187383A1 |
Attorney, Agent or Firm:
Masanori Homma
Toshifumi Uenishi
Toshifumi Uenishi