Title:
MULTIPLE-STEP INSERTION JOINT, STEEL PIPE WITH JOINT, STRUCTURE, METHOD OF CONSTRUCTING STRUCTURE, AND METHODS OF DESIGNING AND PRODUCING MULTIPLE-STEP INSERTION JOINT
Document Type and Number:
WIPO Patent Application WO/2023/074257
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a multiple-step insertion joint, a steel pipe with a joint, a structure, a method of constructing a structure, and methods of designing and producing a multiple-step insertion joint, which prevent meshing of a projecting part and a recessed part that are not to be engaged with each other during insertion, and which provide good workability during steel pipe joining. A multiple-step insertion joint 1 comprises an inner joint pipe 3 and an outer joint pipe 5. One of the inner joint pipe 3 or the outer joint pipe 5 has a divided cylindrical part 11 composed of a plurality of divided pieces 9, and a projecting part 13 provided in multiple steps on the divided pieces 9. The other has a cylindrical part 17 and a recessed part 19 provided in multiple steps on the cylindrical part 17. Steel pipes 7 are joined by engaging the projecting part 13 with the recessed part 19. The multiple-step projecting part 13 gradually decreases in axial width from the projecting part 13 on a distal end side toward the projecting part 13 on a base end side. The multiple-step recessed part 19 gradually decreases in axial width from the recessed part 19 on a distal end side toward the recessed part 19 on a base end side. The axial width of each projecting part 13 is larger than or equal to the axial width of the recessed part 19 located on the distal end side relative to the recessed part 19 with which the projecting part 13 engages during joint fitting.
Inventors:
OHBA YUTO (JP)
Application Number:
PCT/JP2022/036757
Publication Date:
May 04, 2023
Filing Date:
September 30, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
E02D5/24; F16B7/20
Foreign References:
| JP2004293035A | 2004-10-21 | |||
| JP2001182052A | 2001-07-03 | |||
| JP2006046019A | 2006-02-16 | |||
| JP2000291000A | 2000-10-17 | |||
| JP2005264479A | 2005-09-29 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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