| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To protect a cover body housing a pipe joint from being damaged by input of a load. <P>SOLUTION: In the pipe joint protection structure 10, a central bellows 21A, a first bellows 24A and a second bellows 28A are provided in the cover body 22 of a pipe joint protective cover 12 housing the pipe joint 14. In such the case where a load not probable to occur above the ground is input relative to the cover body 22 buried in the ground, each bellows is deformed to make the cover body 22 flex. Thereby, an excessive load is prevented from being applied to the cover body 22, so that the cover body 22 is prevented from being damaged. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
