| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tube which can facilitate an inserting work of a cable into the tube by preventing and reinforcing that both corner parts of a corner of a large-sized rectangular cylinder made into a substantially square shape become weak locally and which can be efficiently continuously manufactured without reducing production efficiency in manufacture. <P>SOLUTION: A cable protecting tube includes the large-sized rectangular cylinder 2 of a substantially square shape in a cross sectional shape having a predetermined length in a tube axial direction, a small-sized rectangular cylinder 3 of a substantially square shape in a cross sectional shape having a predetermined length in a tube axial direction, which are alternately arranged in the axial direction of the tube to constitute a series of tube walls 1 in such a manner that each corner 3a of the small-sized rectangular cylinder 3 is formed in an arc state and a size or this arc state R is set larger in curvature than a radial outer arc state r of a protected interior cable K. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
