DRIVING DEVICE FOR LIFTING DOORS

摘要

1527046 Operating doors CRAWFORD DOOR EUROPEAN CO AB 23 June 1976 [23 June 1975] 26204/76 Heading E2M In a device for operating roller-curtain doors a first flexible pulling wire or cable 9 is attached to the bottom of the door and a second flexible pulling wire or cable 10 is attached to a fastening member 11 attached to the top of the door by a pivoting hinge 13 (not shown) under the influence of a spring 16. A driving mechanism 21 is provided to operate the door through pulleys 6 and balancing springs 7. The axle 5 is driven by a drive means (not shown) e.g. an electrical power unit or a crank handle.