Patent ID: 7735576

Claim:
A device for guiding and tensioning a supply line for a working tool, comprising: a revolving transport chain for moving the working tool along a straight guide; a tension roller about which the supply line is looped for deflecting the supply line by 180°, said tension roller being movable in an advance direction downstream of the working tool conjointly therewith in a same direction but at half an advance speed of the working tool, said tension roller defining a rotation axis and slidably guided transversely to the rotation axis on the guide for the working tool, wherein the tension roller is formed by several rolls which are arranged along a circle defined by a center point coinciding with the rotation axis of the tension roller and which are defined by rotation axes in parallel relationship to the rotation axis of the tension roller; a drive mechanism for moving the tension roller, said drive including a pinion which is mounted on a shaft and which has one zone engaging the transport chain and another opposite zone interacting with a fixed force-transmitting member, and a transport wheel which is mounted onto the shaft of the pinion for interaction with the force-transmitting member; and counter rolls interacting with an outer circumference of the tension roller.