Patent ID: 6752253
Filing Date: 2004-06-22
Classification: B21D,F16P,Y10T

Abstract:
A guard means for machines in the case of which a first machine part performs working movements toward a second machine part, comprising at least one photoelectric detector whose light beam extends perpendicularly to the direction of working movement and which is able to be so positioned between the two machine parts on one thereof that its light beam is at a safety distance from such machine part, such safety distance being able to be set by means of a guard means arranged adjustably on this one machine part, such guard means bearing the at least one photoelectric detector, a halting means adapted to arrest the working movement on interruption of the light beam and a switching off means for switching off the halting means directly prior to interruption of the light beam, further comprising means for the performance of a first movement of the guard means as far as interruption of the light beam by the machine part bearing the guard means and the performance of a second movement of the guard means in the opposite direction, the displacement or distance traveled, which sets the safety distance, in the second movement being able to be predetermined by an electrical measuring and/or control means.