Pull rope

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Tensioning mechanism with ropes for shape signals

In mechanics , the pull rope is a rope which, when pulled , sets a mechanical process in motion, which can include the principle of the pulley block . Application examples:

• In the case of cable cars , the pull rope is used to transmit the drive force. In contrast to this, the suspension rope is used to absorb most of the weight forces.
• In the case of railway signals, the position of the displays (signal arms / plates, etc.) is carried out from the signal box using traction cables (some are still in use). The pull ropes can be several hundred meters long.
• In military technology , the triggers for mines can be operated using pull cables. This is possible by touch or "by hand" by an observer.

In order to transfer movements, actions and forces with as little delay and loss as possible, traction ropes are designed to be low- stretch (also as solid wires) and kept under tension (e.g. by means of tension weights ).