| 摘要 |
PROBLEM TO BE SOLVED: To provide a door capable a molten core material from flowing out when the core material made of a heat insulation plastic is melted when a fire occurs.SOLUTION: An inventive door 5 comprises: groove-shaped vertical materials 37, 37 and groove-shaped horizontal materials 33, 35 assembled at the four peripheral sides; an indoor side surface material 41 and an outdoor side surface material 43; a core material 45 made of a heat insulation plastic provided between the surface materials 41, 43; and corner blocks 49 each arranged in a groove at a corner 47 between the vertical material 37 and the horizontal material 33. The corner block 49 is made of a flame retardant material, and is fitted with a thermal expansion fire-resistant material 53a provided on a face along a groove bottom of the vertical material, a thermal expansion fire-resistant material 53b provided on a face along a groove bottom of the horizontal material, and thermal expansion fire-resistant materials 53c, 53c both faces along an indoor side groove wall and an outdoor side groove wall of the horizontal material. |
