Roller door has the door winding shaft on a trolley, with an angled start path section and a section at a sharper angle to prevent reverse movements from the end position

摘要

The roller door, with a reinforced door (2) wound around a winding shaft (1), rotates on a trolley (3) which moves along at least one path (4) pitched at a slight angle from the horizontal to the front side with the wound door. The path has an angled start section (12) at 3[deg] to the horizontal with a section (10) at a sharper angle to prevent moving backwards by blocking or at least damping a reverse movement from the leading end position. A lock (11) holds the trolley at the end of the reverse block to limit forward movement on reaching the end position. The trolley has a side piece with two lower rollers (6,7).