| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the breakage of a conductive member during expanding and bending a joint portion. <P>SOLUTION: Metal pipe bodies 1, 1 connected to each other via the joint portion 2 are embedded in a sheath pipe P via a filler G, the pipe bodies 1, 1 with the joint portion 2 therebetween are linked to each other via a conductor 12 so that the pipe bodies 1, 1 are conducted with each other, and a movable portion 20 is provided in the conductor 12 for allowing expansion. Thus, when the joint portion 2 is expanded and bent, the conductor 12 can be moved following the movement of the pipe body 1, and so its breakage is prevented. Around the movable portion 20, a protecting member 21 is provided which is formed of a foamed resin molding in close contact with the movable portion 20. Other portions than the movable portion 20 are covered with a protecting member 22 which is formed of a resin protecting pipe, to isolate the conductor 12 from the filler G around the pipe body 1. When the pipe body 1 and the protecting member 21 are moved relative to the filler G with the expansion of the joint portion 2, a void to the filler G therearound is secured to avoid barrier in moving the movable portion 20. <P>COPYRIGHT: (C)2009,JPO&INPIT |
