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    • 4. 发明专利
    • EARTHQUAKE RESISTANT PIPING JOINT
    • JPH10299959A
    • 1998-11-13
    • JP11210397
    • 1997-04-30
    • NIPPON TETSUTOU KOGYO KK
    • KONO IWAO
    • F16L27/12
    • PROBLEM TO BE SOLVED: To cushion external force at the time of an earthquake and prevent the damage of a pipe joint part by fitting both end parts of an expansion joint pipe between the respective joint end parts of relative piping, and fittingly inserting and fastening the end part of a prestressing bar wound around a piping end part, to a bearing plate block disposed at the end part outer periphery of the expansion joint pipe. SOLUTION: A resin adhesive 6 is applied to the outer peripheral surface of the respective joint end parts of relative piping 1, 1, and both end parts of expansion joint pipe 2 of bellows shape are fitted thereto. Bearing plate blocks 3 are arranged and bonded to the end part outer peripheral surface of the expansion joint pipe 2, and both end linear parts of a prestressing bar 4 wound around the end part of the expansion joint pipe 2 are passed through the bearing plate block 3. A nut 5 is thread- fastened to the end part thread part of the prestressing bar 4 and tightened to lead in prestress and to fasten the expansion joint pipe 2 to the piping 1. Looseness after execution of work is prevented, and external force is absorbed by the deforming ability of the expansion joint pipe 2 to bending moment in an optional direction and axial force acting upon a piping structure at the time of an earthquake or the like so as to prevent the damage of the piping 1.