| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress rise of temperature on the non-fire side by reducing radiation heat transfer. <P>SOLUTION: A fire door 1 comprises a door body 3 which is installed in a door frame 2 to be freely opened/closed and which has an air space E in an inner space part surrounded by plate-like members liquid-tightly, a plate-like or sheet-like radiation reflection film 4 installed along the inner surface of the door body 3, and a plurality of plate-like or sheet-like radiation reflection boards 5 arranged parallel to the door surface in the inner space part, in which the plurality of the radiation reflection boards 5 are arranged in the thickness direction of the door body 3 at an interval in the inner space part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
