Patent ID: 6959751

Claim:
A winding system for winding a rolling door assembly having an overhead shaft mounted about a fixed structure and rotatable thereabout along opposite first and second directions of rotation, a drum mounted about said overhead shaft, a door curtain foldable about the drum and unfoldable from the drum via a rotation of the drum, and a counterbalancing spring having first and second ends operatively connected to the overhead shaft and the fixed structure respectively for counterbalancing the rolling door assembly, the winding system comprising: a support bracket rigidly connectable to the fixed structure, said support bracket having receiving means and supporting means, the receiving means comprising a hub projecting from the support plate; a first gear pivotally mounted about the hub of the receiving means of the support bracket and rotatable thereabout along opposite first and second directions of rotation the first gear overhead shaft being extendable through said first gear and said hub; a second gear pivotally mounted about the supporting means of the support bracket and rotatable thereabout along opposite first and second directions of rotation, said second gear being threadably engaged with the first gear such that, rotation of said second gear along one of its first and second directions of rotation causes the first gear to rotate along a corresponding one of its first and second directions of rotation, thereby resulting in a corresponding winding of the counterbalancing spring of the rolling door assembly; and at least one spacer projecting from the support bracket, said at least one spacer being positioned proximate the hub for abutting with the first gear and delimiting positioning of the first gear from the support bracket, the hub comprising at least one longitudinal strip being foldable against the first gear for maintaining the first gear secured against the at least one spacer.