| 摘要 |
PROBLEM TO BE SOLVED: To suppress the heat transfer of an iron-made door in an apartment entrance and keep the interior comfortable temperature to the temperature change of the outside air by sewing magnets into the upper four corners of a curtain cloth consisting of a heat insulating fabric material, and mounting it on the iron-made door from the interior side. SOLUTION: A curtain material consisting of a heat insulating or heat retaining cloth is cut into an entrance door size. The surface of the cloth and a lining are kilted, and magnets are sewed into the upper four corners thereof. The magnet has an attractive force resistant to the weight of the fabric material. This curtain material is mounted on an iron-made door from the interior side, and the curtain material is cut out so that a doorknob or post is exposed. According to this, the transfer of the outside air temperature from the entrance door can be easily prevented, and the interior temperature can be prevented from being changed by the influence of the outside temperature.
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