| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible duct capable of easily and securely performing connections to boxes and chambers in an air-conditioning piping work. SOLUTION: A cylindrical metallic collar 20 is provided to the outer periphery of at least one end of the flexible duct comprising an insulating material 14, a trimming material 13, a covering material 15, and a reinforcing member 17 to form an insertion part, and a gasket 30 is fastened to the outer peripheral part of the collar 20. A restriction part 21 toward the inner periphery is formed on one end of the collar 20, and a brim part 22 toward the outer periphery is formed on the other end as the center side of the flexible duct. The gasket is engaged and fastened with a recess part 23 formed on the collar 20. COPYRIGHT: (C)2005,JPO&NCIPI
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