| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide filter means for a drain pipe which has general-purpose properties and which can be attached to the drain pipe even in the state of making a base end opening of the drain pipe face back soil. <P>SOLUTION: Filter means 1 is inserted into a drain pipe 30, the base end opening 32 of which faces back soil G, from a leading end opening 31. The filter means 1 includes a body member 10 which comprises a fixing part (11) for being fixed to the drain pipe 30 and a pressing part (12) integrated with the fixing part (11), and a metal scrubbing brush 20 which is inserted into the drain pipe 30 on the leading side of the pressing part (12) and pressed against the back soil G by being pressed by the pressing part (12). <P>COPYRIGHT: (C)2013,JPO&INPIT |
