| 摘要 |
PROBLEM TO BE SOLVED: To provide a roof light window structure capable of preventing the falling off of a daylighting plate or the falling off of ventilator opening and shutting pivot metal fittings for a long period of time even when the ventilator or a window frame is thermally deformed in the case a fire breaks out even if a roof light window is constituted by providing the aluminum alloy ventilator to the aluminum alloy window frame. SOLUTION: Inside and outside heat resisting reinforcing plates 5, 6, 8, and 9 monolithically connected with screws are respectively fixed to the inside and outside circumferential surfaces of the circumferential wall frames 11 and 12 and inside and outside circumferential surfaces of the circumferential wall frames 11 and 12 of a ventilator 2, at the same time, opposed horizontal ends of outside heat-resisting reinforcing plates 5 and 6 of the window frame 1 side and ventilator 2 side overlap a horizontal flange section 23 projected outward from the circumferential wall frames to respectively connect ventilator opening and shutting pivot metal fittings 4 consisting of the screws lying between opposed surfaces of the horizontal flange section 23 to the opposed horizontal ends of the outside heat-resisting reinforcing plates 5 and 6 through the horizontal flange section 23 with the screws to fix, and a roof light window structure is so constituted that it bears a daylighting plate by the inside heat-resisting reinforcing plates 5 and 6 on the ventilator 2 side.
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