| 摘要 |
PROBLEM TO BE SOLVED: To close notch portions formed at the tip side of a guide rail when a shutter curtain is fully closed in the configuration of a shutter for a building in which the guide rail oscillates as a result of the opening and closing operation of the shutter curtain and the guide rail takes a horizontal attitude and is stored in a ceiling portion when the shutter curtain has been opened. SOLUTION: An outer side slide rail 15 is provided at the side portion of notch portions 6b, 7b formed to guide pieces 6, 7, an inner side slide rail running on the outer side slide rail 15 is provided for a closing body 13, and then the closing body 13 slides and moves by its deadweight when the guide rail 5 oscillate up and down and the notch portions 6b, 7b are opened or closed.
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