Driven drum for roller shutter, door or straps is made from parallel tubes with end fittings for drive shafts and inner reinforcing members

摘要

The drum comprises parallel tubes (18) connected at each end by a fixing (21) to a drive shaft (29). The interior of the drum between (18) has reinforcing member(s) (31) in the form of a toothed cylinder (32) that co-operates with (29) and limits the drum's axial deformation. (18) have end plugs (19) engaging with (21) in the shape of toothed wheels formed from flanges (22) and toothed cylinders (23). The drum consists of two or more parallel tubes (18) connected at each end by a fixing (21) to a drive shaft (29). The interior of the drum between the tubes has at least one reinforcing member (31) in the form of a toothed cylinder (32) that co-operates with (29) and limits the drum's axial deformation. (18) have end plugs (19) engaging with the fixings (21), which are in the shape of toothed wheels formed from flanges (22) and toothed cylinders (23).