鋼管の接合継手、該鋼管の接合継手を用いた鋼管の接合方法、鋼管矢板

Japanese Patent JP7163937

B2

To provide a connection joint of steel pipes having an adjustment allowance in a circumferential direction and capable of efficiently exhibiting a reverse rotation prevention function, and to provide a connection method of steel pipes and a steel pipe sheet pile.SOLUTION: A connection joint 1 of steel pipes in this invention includes: an inside joint pipe 5; an outside joint pipe 7 having tap holes 7a, 7b for rotation prevention; and a rotation prevention bolt 9. The tap holes 7a, 7b for rotation prevention penetrate in a perpendicular direction to a pipe shaft and in a radial direction of the pipe. The inside joint pipe 5 includes sloped face portions 5a, 5b which is sloped to be deeper as going in a screwing reverse rotation direction at positions corresponding to the tap holes 7a, 7b when engaged with the outside joint pipe 7 and whose circumferential direction lengths are set to be longer than a diameter of the rotation prevention bolt 9. The rotation prevention bolt 9 includes a conical portion 9a at a tip. A slope angle of the conical portion 9a is substantially the same as slope angles of the sloped face portions 5a, 5b of the inside joint pipe 5. In a state where the outside joint pipe 7 is engaged with the inside joint pipe 5, the rotation prevention bolts 9 are inserted into the tap holes 7a, 7b, and the conical portions of the rotation prevention bolts 9 are made to be in contact with the sloped face portions 5a, 5b, prevent a reverse rotation.SELECTED DRAWING: Figure 1

Hiroya Okubo

JP2020048849A

November 01, 2022

March 19, 2020

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jfe Steel Corporation

E02D5/08; E02D5/24

JP2007063806A
JP2016141976A
JP61109907U
JP2018123546A

Toshihiko Ishikawa

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