| 摘要 |
PROBLEM TO BE SOLVED: To facilitate mounting of a ventilator by providing a pair of U-shaped reinforcing fittings which have recesses thereof inserted into an annular periphery of an opening portion, fixing a flange portion of a main case to surfaces of the reinforcing fittings disposed in the indoor side by means of screws and clamping a ceiling plate between the tip ends of the screws and surfaces of the fittings disposed in the ceiling. SOLUTION: A ventilator for a duct is mounted in the periphery of an opening portion 2 such that the ventilator protrudes upwardly from a ceiling plate 1. A pair of U-shaped reinforcing fittings 3a, 3b are provided and such fittings have their recesses 4 inserted into the annular periphery of the opening portion 2. When a flange portion 21 of a main case 5 is fixed to the surfaces of the reinforcing fittings 3a, 3b disposed in the indoor side by means of screws 23, a ceiling plate 1 is clamped between the tip ends of the screws 23 and the surfaces of the reinforcing fittings 3a, 3b disposed in the ceiling and the reinforcing fittings 3a, 3b are also fixed. In this manner, since the reinforcing fittings can also be fixed at the time of fixing the main case, a mounting operation becomes facilitated. |
