| 摘要 |
An arrangement for mechanically affecting the tension in coilable materials comprises at least one disc (10), the circumference of which at least partly is in contact with the coilable material, said at least one disc (10) comprises an inner disc (11) drivable by a drive shaft (12) and an outer ring (13) arranged substantially around the circumference of the inner disc (11), the outer ring (13) is provided with geometrical structures (14) at an inner portion thereof, an actuator unit (30) arranged on the inner disc (11) is in mechanical engagement with the geometrical structures (14), and is arranged to exert a force on the outer ring (13) in a first rotational direction (15) relative the inner disc (11), and a retaining mechanism (40) arranged at the inner disc (11) in mechanical engagement with the geometrical structures (14), the retaining mechanism (40) is arranged to prevent movement of the outer ring (13) in a second rotational direction (16) opposite the first rotational direction (15), and is also arranged to allow outer ring movement in the first rotational direction (15). |
