Apparatus for opening and shutting a flexible sheet

PURPOSE: A flexible sheet operating device is provided to improve durability by preventing the separation of guide blocks by external impact and to cut down expenses by replacing the damaged guide block only. CONSTITUTION: The flexible sheet operating device comprises guide channels installed on both edges of an entrance, a flexible sheet(10) guided to the guide channel to be moved vertically, and a take-up unit(60) unwinding or winding the flexible sheet(10). Wherein the flexible sheet(10) contains many joint holes which are formed on both edges at regular intervals and attached with a guide block(40), and the guide block(40) contains many primary blocks(41) formed on one side of the flexible sheet(10) to be engaged with a driving sprocket(61) and many secondary blocks(42) coupled with the primary blocks(41) to be guided to the guide channels together with the primary blocks(41).