| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe joint reducing the weight of a liner and a cost by installing the liner on the axis of a socket and a spigot. SOLUTION: The pipe joint 1 with the spigot 17 inserted inside and joined to the socket 3 includes the liner 2 pressed into the internal back side of the socket 3 by the spigot 17 and installed between the tip of the spigot 17 and the internal back side of the socket 3. A thin corrugated plate 5 is provided on the inner face 4 of the socket 3. The cross section of the corrugated plate orthogonal to a pipe axis direction has a shape in which convexities 12 and concavities 13 continue alternately. The corrugated plate is installed in a state of being subjected to compressive force from the inner face 4 of the socket 3 and being deformed elastically. The corrugated plate presses the outer peripheral face 15 of the liner 2 in a pipe diameter direction and guides the liner 2 so that the axis of the liner 2 lies on the axis 10 of the socket 3 and the spigot 17. COPYRIGHT: (C)2011,JPO&INPIT |
