Fastener for roller shutter comprises links, connected by hinges, whose action radius is modified by wedge clamped between edges of two links

摘要

The fastener which connects the shutter to its winding shaft locks the shutter in the closed position and stops the mechanism controlling the shutter movement at the end of its travel. The fastener is composed of links (1,12) connected by hinges. The fastener action radius can be modified by a wedge (2), fixed to one of the links, whose upper part is clamped between the edges of two links.