| 摘要 |
PROBLEM TO BE SOLVED: To provide an airtight structure for a cold reserving storage prolonging the durability by uniformizing the warp of a gasket to enhance the airtightness. SOLUTION: A leg 7 stretched from both ends of an air chamber 5 constituted of an elliptic air chamber 5c and an external air chamber 5d to the bottom face 14 of a fitting step 12 in the fitting step 12 of a door 2. Two blades 6 are stretched from the upper and lower parts of the air chamber 5 toward the wall face 13 of the fitting step 12 and the gasket 4 formed as a fitting piece 8 which is formed by bending the leg 7 of the peripheral side 15 of the door of the air chamber 5 is fixed with a screw 11 through a retaining metal plate 10 with a plate spring 9. Further, an auxiliary rib 16 is overhung from the bend of the lower end of the leg 7 and the edge of the auxiliary rib 16 comes into contact with a small step 12b.
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