| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation device capable of being easily constructed so that a duct has falling gradient toward the outside of a house in inserting the duct. <P>SOLUTION: A setting ring 3 composed of a cylindrical portion 4, and a thin disc-shaped lip 5 projecting to the outer circumferential direction from the cylindrical portion 4 and made of an elastic material is mounted on a resin duct connecting portion 2 of the ventilation device to which the duct is connected, the plurality of lips 5 are arranged in parallel with each other in the axial direction of the setting ring 3, the lip 5 at a tip side of the duct connecting portion 2 is eccentric downward, and the lip 5 at a depth side of the duct connecting portion 2 includes the setting ring 3 eccentric upward. <P>COPYRIGHT: (C)2009,JPO&INPIT |
