Protection of Shearing and Crushing Edges
The Machinery Directive states that dangerous machines may only be put into operation once comprehensive safety measures have been taken to protect the personnel working with these machines. To protect against risks at shearing and crushing edges, safety sensitive edges are employed. Applications such as machine guards, lifting tables, theatre stages and many others are typical. Safety edges, when activated, will immediately switch off the power source. Prior to the launch of the Haake safety edge, either electrically operating devices to the N/O principle (two conductive strips or layers are brought together when the safety edge is operated), or opto-electronic systems (a light beam is interrupted) were the standard product options available on the market. Such devices operate via signals, which need to be transformed and processed via a control unit. One of these measures is for the protection of shearing and crushing edges at automatically driven devices bearing a substantial risk of injury.