Torantrieb für Schiebetore, insbesondere Feuerschutz-Schiebetore

摘要

The draw line (5) is of the wound or wrapped type and is formed with a screw-form spiral (6). The drive wheel (8) has a grooved drive surface (9) corresponding to the pitch of the spiral. Also the guide rollers (12) of the door drive (1) have a groove cover surface corresponding to the spiral pitch. The wire line (5) comprises several braids (7), whereby at least one outside braid forming the spiral and a five times larger diameter than the other braids. USE/ADVANTAGE - A fire protection push door drive with an improved anti-slip arrangement between the draw line and the drive wheel.