| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a coupling part from being displaced following distortion of the ground by seismic force and from slipping off from a connecting buried pipe, by arranging a coil reinforcing material in the center part in section of a cylindrical body wall of a coupling, and forming the body wall inside the coil reinforcing material into a shape in which it is expanded in the outer peripheral direction. SOLUTION: A coil reinforcing material 7 is arranged in the center part in section of a cylindrical body wall composed of inner and outer surface rubber layers 2, 3 in a flexible coupling 1. Rubber coated fiber reinforcing layers 4, 5 are provided on the inner and outer sides of the coil reinforcing material 7. A flexible part is constituted by forming the body wall into a shape that it is expanded inside the coil reinforcing material 7 in the outer peripheral direction, and both ends are fixed to flanges 10. When the flexible coupling 1 is connected to a buried pipe, it can be displaced following the displacement of the ground in the pipe shaft direction or the pipe shaft perpendicular direction, to be generated by force in the earthquake or the other external force.</p> |
