| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a volume increasing frame for septic tank for which cutting work corresponding to an inclined ground surface of an installation position can be easily performed, a member can be rapidly deformed from a flat plate shape to a cylindrical shape without requiring any large labor and the cylindrical shape can be surely maintained to resist an external pressure. <P>SOLUTION: There is provided the volume increasing frame for septic tank connected to an upper opening of a septic tank body. The frame includes: a volume increasing member 2 integrally formed by molding processing by plastic, having a flat plate shape outline in which both ends of two flat plates 3 in overlapping arrangement are mutually connected via thin connection parts 4 having flexibility and the two flat plates 3 are provided with deformation promotion means 9 which can be curved and deformed into a semi-cylindrical body; and shape-retaining members 12 for holding forming portions of the thin connection parts 4 in a curved shape for forming a part of a cylindrical body. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
