| 摘要 |
PROBLEM TO BE SOLVED: To provide an expansion joint capable of effectively restricting heap of slurry and a flow loss, while securely and excellently achieving an expected extending/shrinking function and an expected bending function, and facilitating the work for assembling both pipes. SOLUTION: A recessed part S formed over from the inner peripheral surface 1b of a receiver pipe part 1 and the inner peripheral surface 2a of an inserting pipe part 2 connected to the receiver pipe in the sealing condition freely to be extended/shrunken and freely to be bent and formed to be opened inward in the radial direction between the inserting side end surface 2b of the inserting pipe part 2 and the inner peripheral surface part 1d of the receiver pipe part 1 opposite to the described end surface 2b in the shaft core X direction of the pipes can be covered over the whole extension moving range of both the pipe parts 1 and 2. A synthetic resin sleeve 4 to be elastically deformed with bending of both the pipe bodies 1 and 2 in the condition that the cylindrical shape thereof is nearly maintained is inserted to be brought in contact with the inner peripheral surfaces of both the pipe parts 1 and 2, and at least one of the pipe parts 1 and 2 and the sleeve 4 can be slid with each other in the shaft core X direction of the pipes. COPYRIGHT: (C)2004,JPO&NCIPI
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