| 摘要 |
PROBLEM TO BE SOLVED: To improve installing strength of a guide rail to a shutter frame, and to enhance wide resistant strength. SOLUTION: This shutter is provided with the shutter frame 14 being arranged in an opening of a building and having the guide rail 20 for liftably supporting both side end parts of a shutter plate 12 and a shutter box 13 being arranged in an upper part of this shutter frame 14 and winding and housing the shutter plate 12. The guide rail 20 is detachably installed in the shutter frame 14. A reinforcing member 80 for reinforcing the installing strength to the shutter frame 14 is arranged on the guide rail 20.
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