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Title:
EXTERNAL THREAD MEMBER
Document Type and Number:
Japanese Patent JP2016156400
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To increase a service life of a rolling tool by minimizing processing stress between a guide ridge and a cylindrical guide in rolling by changing a structure of a tip of the guide ridge.SOLUTION: An external thread member has a head portion 10 and a shank portion 20, and the shank portion 20 has an ordinary threaded portion 22 having an ordinary ridge 21 to be fastened to an internal thread member 110, a guide threaded portion 26 disposed at a shank portion tip side with respect to the ordinary threaded portion 22, and having a guide ridge 25 of a diameter smaller than the ordinary ridge 21 with the same pitch, and a cylindrical guide 24 disposed further at the shank portion tip side of the guide threaded portion 26. A non-threaded region 29 is disposed between the guide ridge 25 and the cylindrical guide 24, and an axial gap g is formed between a tip 25e of the guide ridge 25 and the cylindrical guide 24.SELECTED DRAWING: Figure 1

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Inventors:
MORI SHIGETO
TANABE KENICHIRO
MATSUEDA YOICHI
MATSUNO MAYUMI
Application Number:
JP2015032929A
Publication Date:
September 01, 2016
Filing Date:
February 23, 2015
Export Citation:
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Assignee:
TOPURA KK
International Classes:
F16B35/00; B21H3/02
Domestic Patent References:
JPS54147364U1979-10-13
JPS54147364U1979-10-13
JPH05141407A1993-06-08
JPH0285007U1990-07-03
JP2000291616A2000-10-20
JPH11351221A1999-12-24
JPS55179218U1980-12-23
JPS58146114U1983-10-01
Foreign References:
US4261402A1981-04-14
WO1997041360A11997-11-06
US4261402A1981-04-14
WO1997041360A11997-11-06
WO2006134626A12006-12-21
Attorney, Agent or Firm:
Kazunobu Sera
Yoshiyuki Kawaguchi
Hiroyasu Kanai
Koichiro Sakai
Ryota Morihiro