Arrangement for driving pliable tractive force transmitting element - involves body, drive unit, and power component for moving drive unit forwards and backwards relatively to body

摘要

The arrangement involves a body (4), a drive unit (6), a power component (12) for moving the drive unit forwards and backwards relatively to the body, and on the drive unit is arrangement an engagement component which with the forwards movement of the drive unit engages the transmitting element to drive it forwards. When the drive unit executes its return movement, the transmitting element is not allowed to move backwards.