| 摘要 |
PROBLEM TO BE SOLVED: To prevent plastic deformation of a synthetic resin plate while exhibiting the thermally insulating effect inside-outside of a shed. SOLUTION: A horizontal frame 12A constitutes the lower edge of an opening part 14, and is filled with a thermally insulating material 37 by fitting a synthetic resin internal facing plate 25 outside an external facing plate 20 made of a magnetic metallic plate. Thick parts 28A and 28B are formed on the tip and the base end on an inner surface of a cover part 27 of the internal facing plate 25, and an air layer 30 is formed inside. Two projection strips 35 are formed on an inner surface of the tip side thick part 28A. Only the projection strips 35 are formed of a soft resin by two-color molding, and are rich in resiliency in lower rigidity than the other part. When a load such as a storage object is applied to the cover part 27, the projection strips 35 are preferentially elastically deformed, and deformation hardly reaches a body part. Since this side air layer 30 hardly collapses by being partitioned by a partition wall 31, the air layer 30 is maintained, and the thermally insulating effect is exhibited. The load and impact are absorbed by elastic deformation of the projection strips 35, to prevent the plastic deformation and damage of the cover part 27. COPYRIGHT: (C)2005,JPO&NCIPI
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