| 摘要 |
<p>PURPOSE:To dispense with a special jig and to improve workability by forming a fireproof insulating layer with a ceramic wool mat and by keeping airtightness with a liquid sealing material. CONSTITUTION:A steel plate 2 is embedded into the front surface of a wall penetration hole 1. A frame body 3 is set to the wall penetration hole 1 by welding a flange 3a to this steel plate 2. In front and at the rear inside the frame body 3 ceramic mat 4 is engaged and is divided by a longitudinal slit 5. The mat 4 on the divided surface is put face to face, by which a cable insertion passage 5 is formed. In the cable insertion passage 5 brushes 6 are provided all over the whole length, with which the cable insertion passage 5 is covered. When the insertion of cable is completed, a sealing material 8 hardened in the elapse of time is poured into the space from a seal pouring inlet 10. The clearance between the cable and cable insertion passage 5 is covered with brushes 6, by which the leakage of liquid seal is prevented.</p> |
