Antriebsvorrichtung für ein Torblatt oder dergleichen

摘要

The assembly has a driving head fixed to the building, and a chain running round driving and return sprockets and with a driving member fixed to the leaf. The sprockets (17, 19) and chain (20) are accommodated in a guide rail (9), forming a complete pre-assembled unit (8), which is coupled to the head (2). The driving motor can have an output-shaft gear meshing with one transmitting the driving torque to the driving sprocket. The latter two can be coaxial, turning with a common shaft rotating in the rail.