| 摘要 |
PROBLEM TO BE SOLVED: To prevent the flexure and deformation of a door for a wide door such as a double swinging door or a main and sub door. SOLUTION: A support member 5 having an abutting part that abuts on a lower frame 4 of the door frame 3, and an adjusting mechanism for adjusting the height of the abutting part is disposed between a continuous footing 1 and the lower frame 4 to support the lower frame 4 by the support member 5.
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