| 摘要 |
PROBLEM TO BE SOLVED: To provide a Kikuware-futa (radially-split pattern lid) having a structure preventing a bellows-like section from being deformed even if it is used for a long time and having an outer diameter simply adjusted according to the size of the drain port, in a round Kikuware-futa (radially-split pattern lid) capable of being freely removably fitted in the drain port and having a central section of a radially-split pattern. SOLUTION: The round Kikuware-futa can be fitted or placed freely removably in the drain port, and is provided with the central section of the radially split pattern formed by a plurality of bellows 2 extended in a center section from the lid main body 1 consisting of an outer circumferential section, and reinforcement ribs 4 are each provided on the bottom faces of the bellows from the roots to the tip ends of the bellows. The bellows may be provided with a downwardly inclined structure toward the tip end, and a concentric circular groove capable of being separated according to the size of the drain port may be provided on the outer circumferential section of the main body. Further, the outer circumferential end of the main body and the groove may be provided with a notch. COPYRIGHT: (C)2006,JPO&NCIPI
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