| 摘要 |
PROBLEM TO BE SOLVED: To provide a panel-flush door which improves security performance, air tightness and heat insulating properties. SOLUTION: Mutual advantages of a panel door, which uses steel plates, and a flush door, which is drum-paneled in sheet steel, are adopted to create a flush door A wherein the sheet steel is stuck on the inside of the panel door. A heat insulating material A-5 is infilled between a front board and a back board in order to improve airtight performance, sound insulating performance and heat insulating performance. An airtight material B is stuck throughout an outer periphery inside the door, and brought into close contact with the whole of a door stop part B-1 of a frame for fittings as soon as the door is closed, so as to improve the airtight performance, etc. A finger can be prevented from being caught in a gap between the frame of the fittings and the door on a door-end side of the door and a hinged side thereof, and the steel plate is used for an outside plate so as to enable securement of safety in terms of securities.
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