| 摘要 |
<p>PROBLEM TO BE SOLVED: To facilitate the insertion support of a body to be penetrated such as a cable used for a division section. SOLUTION: This through cylindrical body 13 is formed by connecting a plurality of a square sectional cylinders 14 with a connecting member, and an insertion path for independently inserting through a cable 16 functioning as a body to be penetrated is composed of each cylinder 14. In addition, closing means 18, 22 for independently closing both the opened ends of each insertion path are provided in the straight through cylindrical body, and a fire proof filling material 19 is formed in an expanding state on the outer periphery of the through cylindrical body 13, which is provided with an inorganic foaming precursor body as the fire proof filling forming material 19 to fill up a space formed between the inner periphery of a through hole 12 and the outer periphery of the through cylindrical body 13.</p> |
