Title:
SCREW JOINT OF STEEL PIPE
Document Type and Number:
Japanese Patent JP2019132117
Kind Code:
A
Abstract:
To provide a screw joint of a steel pipe which easily starts rotation and fitting and is excellent in fitting workability even in a multiple screw having three or more strip numbers.SOLUTION: A screw joint 1 of a steel pipe is provided on the end of a steel pipe 3 that supports a structure and connects the steel pipes, and is a multiple screw joint consisting of a male joint part 5m having three or more male screws and a female joint part 5f having three or more female screws, in which the tip shapes of threads 9m and 9f are formed so that screw bottom widths Wand Win screw start ends 7m and 7f of the male joint part 5m and/or female joint part 5f are widened to the tip and are wider than the screw bottom widths Wand Wother than the screw start ends 7m and 7f.SELECTED DRAWING: Figure 1
Inventors:
SATO RYOICHI
ICHIKAWA KAZUOMI
ICHIKAWA KAZUOMI
Application Number:
JP2018236952A
Publication Date:
August 08, 2019
Filing Date:
December 19, 2018
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
E02D5/24; E02D5/28
Domestic Patent References:
| JPH10311028A | 1998-11-24 | |||
| JPH0798009A | 1995-04-11 | |||
| JP2002213425A | 2002-07-31 | |||
| JP2004116771A | 2004-04-15 |
Foreign References:
| US20120273233A1 | 2012-11-01 |
Attorney, Agent or Firm:
Toshihiko Ishikawa