| 摘要 |
PROBLEM TO BE SOLVED: To provide a piercing structure of a fireproof compartment capable of quickly inflating a refractory material located inside the fireproof compartment and effectively exhibiting the fireproofing effect inside the fireproof compartment, and a piercing cylinder forming the piercing structure. SOLUTION: The piercing structure is formed in a fireproof compartment wall 11 by inserting a cable 12 into the piercing cylinder 14 set in a through hole 13 piercing a fireproof compartment wall 11 in the cross direction and disposing the refractory material 15 in the gap between the outer surface of the cable 12 and the inner surface of the piercing cylinder 14. In the setting state of the piercing cylinder 14 to the fireproof compartment wall 11, a heat propagation space S is formed between the outer surface of the piercing cylinder 14 and the inner surface of the through-hole 13. Accordingly, when a fire breaks out, the heat of the fire is propagated in the heat propagation space S to quickly heat the piercing cylinder 14 from the outer surface side, so that the refractory material 15 can be quickly inflated. COPYRIGHT: (C)2004,JPO
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