| 摘要 |
PROBLEM TO BE SOLVED: To firmly connect an expanded heat-insulating material to an internal case, and at the same time, to easily peel off the expanded heat-insulating material in the case of disassembling by composing the internal case of a sheet material with a release function at least at a part to be brought into contact with the expanded heat insulating material, and at the same time, a molding with a recessed part in which an inner part spreads wider than the opening. SOLUTION: An inner plate 2 for composing an internal case is composed of a sheet material with a release function at a surface part 5, in contact with at least an expanded heat insulating material 4, and a recessed part 6 with a nearlyΩ-shaped section where an inner part spreads wider than an opening is provided. By the recessed part 6, an outer enclosure 3 is firmly connected to the expanded heat insulating material 4 for maintaining strength. In disassembly, a tool with a flat edge is inserted into the space between the outer and inner plates 1 and 2 from the end of the inner plate 2, and the inner plate 2 is bent. Then, the bent part is grasped and in the manner of winding for peeling it from the expanded heat insulating material 4, thus the expanded heat insulating material 4 is peeled off without its remaining on an inner surface 7 of the recessed part 6.
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