A SCREENING ARRANGEMENT

摘要

The screening arrangement comprises a flexible length of screening material, a tubular rod (13), along which one end of the length is fastened, and around which the length can be wound, and a driving device for moving the length towards or away from the tubular rod. The driving device comprises an input shaft driving a driver member in driving engagement with the length. The tubular rod (13) is connected with one end of a torsion spring (35), the other end of which is connected with a drive shaft (31) driven by the input shaft in such a manner that in connection with rewinding and unwinding, the drive shaft has the same direction of rotation as the tubular rod (13).