| 摘要 |
PROBLEM TO BE SOLVED: To provide a door capable of preventing fire spread due to combustible gas produced within the door from being caused, in case of fire.SOLUTION: A door includes a frame 1, door panels 2 that are openably/closably attached to the frame 1, and an airtight material 3 that is provided between the frame 1 and the door panels 2. The door panels 2 include front-side and back-side panels 4a and 4b, a core material 5 that is arranged between the panels 4a and 4b, and reinforcing materials 6 and 7 that are arranged between the panels 4a and 4b along edges of the panels 4a and 4b. A vent hole 8 is provided in the hinged-side reinforcing material 6a, and the airtight material 3 is provided in a position displaced in a depth direction with respect to the vent hole 8. |
