| 摘要 |
PURPOSE:To make it possible to take out and mount the net from the indoor side by making the net width smaller than the inner width of a wall surface opening part and providing a net mounting part for accommodating and holding the net in the inside from both side surfaces of the wall surface opening part. CONSTITUTION:The width dimension W of a net 12 is set to a dimension which is smaller than the inner width dimension of opening part 3 of the house wall surface. Net fitting tools 16 are loaded at both inner side surfaces of a main cover body 4. In this case, positions where rail-like metal fittings 16 in both inner side surfaces of the main cover body 4 are formed into swelling portions 17 projecting inwardly. As a result, rail-like metal fittings 16 are set so that they arelocatd at positions which are inner than the positions of both side edges of the opening part 3 of the house wall surface 1. When the net 12 is moved forward along the rail-like metal fittings 16 from indoor side, the net 12 can be accommodated and held in positions covering the lower surface open ing part 5 of the main cover body 4. |
