| 摘要 |
<p>PROBLEM TO BE SOLVED: To assure a sealing effect by caulking corner pieces to four corners of a flange of an angular duct and providing a sheet-like packing at a surface of a flange side of the corner pieces. SOLUTION: A pair of tongues 16 which corresponds to a projection 12 of a corner piece body 10 is formed as an attached part corresponding to a recess 13, and an adhesive layer corresponding to the corner piece body 10 is formed at a back surface of a packing 14 using a sheet-like polyurethane foam. In the state the packing 14 is previously attached to the position that corresponds to the recess 13 of the corner piece body 10, the corner piece body 10 is attached by caulking to four corners of a flange of an angular duct, and under a condition where a tongue 15 of the packing 14 is sandwiched between the corner of the duct and the projection 12 the leakage part is sealed. At the same time, each attached part 16 is sandwiched between the corner piece bodies 10 to avoid the leakage in the surface direction. Accordingly, a sealing effect can be assured.</p> |
