| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To secure the air-tightness of an existing steel door set till 1975s without being remodeled. <P>SOLUTION: An airtight bar 3 is retrofit, through magnetic attraction, on the upper frame of an existing door frame 1 in the existing steel door A and also on an indoor side depth faces 12 of lateral vertical frames so that an airtight member 32 may be directed to the upper frame 21 and the vertical frame 23 sides of an existing press door 2, and similarly the airtight bar 3 is retrofit, through the magnetic attraction, on the lower frame 22 of the existing press door 2 so that the airtight member 32 may be directed to the indoor side depth face 12 side of the lower frame of the existing door frame 1. Thereby, the airtight member 32 of the airtight bar 3 secures the air-tightness of the existing steel door A and the airtight bar 3 is retrofit, through the magnetic attraction, without disturbing the opening/closing of the steel door, enabling a position adjustment following the existing door frame 1 deformed due to use over years. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
