| 摘要 |
The installation of a fire retarding division-penetrating member is enhanced and the member fits the outer circumference of inconstant penetrating material to prevent the filler from dropping. The heat expansion fire resistant material may be securely provided. A tongue piece (17) of fire resistant material (16) may fit to the surface and valley of pipe (25) and cable (26) only by fitting the saw teeth state heat expansion fire resistant material (16) with its upper face being covered with the sheet (19) inside the holding frame (11) of sleeve main bodies (10) and (10a) that are split into two pieces and by dropping these sleeve main bodies (10) and (10a) into the floor through-hole (24) from above. In this way, the filler like mortar (28) and so forth can be immediately filled from the upper floor with no need for repairing the heat expansion fire resistant material (16). Further, the heat expansion fire resistant material (16) securely functions with the heat during a fire disaster, blocks the floor through-hole (24) and prevents the flames, heat, smoke, etc. from invading into the upper floor and the lower floor.
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