| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a thermally-expansible fire-resistant closure that is prevented from falling with expansion when a thermal expansion material used in the fire-resistant closure is expanded by heat. <P>SOLUTION: A pipe line is completely closed by efficiently filling a space caused by a reduction of volume of a resin pipe or the like by heat by making it less likely for a thermally-expansible member 3 expanded by heat to leak out of a noncombustible cylinder in large amount or to fall from the inside of the noncombustible cylinder 2 by causing the noncombustible cylinder to be deformed such that folded portions are unfolded to an original state. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
