Title:
緩み防止用ねじ山構造及びその加工工具
Document Type and Number:
Japanese Patent JP6469888
Kind Code:
B2
Abstract:
The present invention provides a looseness-prevention screw thread structure including a screw thread having a predetermined pitch, a no-load flank which is an inclined surface in a direction in which the screw thread is advanced, and a load flank which is an inclined surface in a direction in which the screw thread is retracted, the no-load flank and the load flank being formed at both sides of the screw thread, in which the no-load flank of the screw thread includes: a first tangential portion which abuts against an arc portion formed at a thread crest of an opposing fastening object; and a second tangential portion which has a preset angle with respect to the first tangential portion and abuts against the arc portion.
Inventors:
Seo Hyun Woo
Jang Won Bomb
Jang Won Bomb
Application Number:
JP2017554224A
Publication Date:
February 13, 2019
Filing Date:
January 05, 2016
Export Citation:
Assignee:
DAE KWANG METAL.CO.LTD
International Classes:
F16B39/30; B21H3/04; B21H3/06; B23G5/04; B23G5/06; B23G5/18; B23G7/00; F16B33/02
Domestic Patent References:
JP59063213U | ||||
JP2008208983A | ||||
JP2004247Y2 | ||||
JP2005140325A | ||||
JP2014037893A | ||||
JP2014206234A | ||||
JP2008519227A | ||||
JP5027916B2 | ||||
JP2015010703A | ||||
JP55003566B2 |
Foreign References:
KR1020120136213A | ||||
US20120195713 |
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Hiroshi Okabe
Mitsuo Tanaka
Hiroshi Okabe