| 摘要 |
PROBLEM TO BE SOLVED: To improve sealing performance when used at an ordinary temperature and exposed to a high temperature. SOLUTION: An annular storage part 22 is formed by projecting a cylindrical projection 20 for guiding the insertion of a corrugated pipe 2 from a deep end surface 19 in the deep-side inner peripheral surface 21 of a cylindrical body 11 toward the inlet side. A fire resistant sealant 51 having fire resistant performance, and expanding to exhibit a sealing function when exposed to the high temperature, is disposed on the whole surface of the deep end of the annular storage part 22. A standard sealant 52 having no fire resistant performance but exhibiting the sealing performance at the ordinary temperature is disposed over a predetermined number of crests on the outer periphery of the corrugated pipe 2 in the annular storage part 22. COPYRIGHT: (C)2011,JPO&INPIT |
