| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the volume, and to improve mounting workability. <P>SOLUTION: A pipe travel guide tool 10 is fitted in a pipe P in the jacking method wherein the pipe P is inserted into the precedent pipe P to connect the pipes P together for newly arranging a pipeline inside a sleeve pipe P'. A spherical roller 12 is charged in an annular casing 11 having a U shaped cross section so as to be unable to be removed or to be freely rolled, the casing 11 is locked by a socket 2, and the roller 12 is rolled on an inner surface of the sleeve pipe P'. It is enough that the casing has a size (diameter) of being fitted to a straight pipe part and being prevented from slipping out of the socket if the casing is locked by the socket, and the structure can be facilitated. Attachment to the pipe can be performed only by fitting the casing into the pipe, and enhanced workability is exhibited. In the structure wherein the roller is charged in the casing, the casing supporting the roller is usually in a shape of a gutter, and the volume when the casing with the roller is fitted to the pipe is the sum of the thickness of the casing and the diameter of the roller, and the volume is reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
