| 摘要 |
PROBLEM TO BE SOLVED: To solve such an unsightly external appearance that the guide ditch of a guide-rail is exposed. SOLUTION: A connecting member 7 in which a cam ditch 7a is formed on the upper part of a ditch blockage board 3 blocking a guide ditch 1c is fixed. A connection member 6 is fixed on the seat board 5 of a shutter to connect to the cam ditch. the seat board of a shutter is in the state (A) of rising to the vicinity of a lintel 10. The ditch blockage board has not yet come out of the opening part of the guide ditch until this state. Moreover the lower part of the ditch blockage board advances slidingly so that the upper part appears on the guide ditch as restricting the movement with lever member 8 when a shutter curtain rises (B). The guide ditch 1c is hided by the ditch blockage board and it is not exposed, when the shutter is opened because the ditch blockage board blocks a guide ditch 1c in the final position of the rising of the shutter (C).
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