| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a covering lid in which the recycling ratio is high, the requests of a green purchase method can be met, the corrosion resistance is excellent, the assembly is relatively simple, upper and lower synthetic resin plates can be renewed and used for a long time even when they are damaged, and any change in dimensions, etc., may be flexibly coped with. SOLUTION: A plurality of aluminum intermediate sashes 2 are disposed parallel to each other on the inner side of a peripheral aluminum frame 1, and synthetic resin plates 3 and 3 overlap thereon to form the covering lid fixed by stoppers. An elastically deformable packing 5 is fitted to an outer surface of the peripheral frame 1 or an outer surface of the frame 1 at both ends in the width direction as necessary. Every aluminum frame 1 or every intermediate sash 2 can be recycled. Since the upper and lower synthetic resin plates 3 and 3 have excellent corrosion resistance, and fixed by the stoppers, the assembly thereof is simple, and the synthetic resin plates can be easily replaced.</p> |
