Tilting door, has balancing device including counterweight connected to beam by hinge, where ends of beam are connected to cables that pass over pulleys and connect bottom corners of apron to common counterweight, respectively

摘要

The door has a tilting apron (1) that is guided vertically in its lower part in rails (2a, 2b). A balancing device (6) has a counterweight (61) connected to a beam by a hinge (63). Bottom corners (11a, 11b) of the apron are connected to the common counterweight by cables (3a, 3b) passing over pulleys (4a, 4b), respectively. Ends (64a, 64b) of the beam are connected to the respective cables. The cables are chosen from belts, notched belts, chains, and straps. The pulleys are chosen from rope pulleys, belt/strap pulleys, and chain pulleys.