| 摘要 |
PROBLEM TO BE SOLVED: To provide a window shutter that prevents a flame from passing through a gap between a lateral member of a case body and an inspection plate, in a state in which a side cap is melted and dropped in the case of fire.SOLUTION: In a window shutter, a shutter case 3 is formed by covering outside surfaces of right and left lateral members 30 of a case body 3a with a side cap 40 and attaching an inspection plate 50 across the right and left lateral members 30; and a heating expansion material 7 is provided on the backside of the inspection plate 50. The window shutter closes a gap between the backside of the inspection plate 50 and the front side of the lateral member 30 with the expanded heating expansion material, when the side cap 40 is melted and dropped in the case of fire. |
