SAFETY DEVICE FOR PRESS BRAKE AND CONTROL METHOD FOR PRESS BRAKE

A projector (30) emits laser light (L30) in such a way that the laser light passes through between a punch (14) and a die (24). An optical receiver (41) includes a photodetector, and determines whether the optical receiver is in a light receiving state or a light obstructing state of the laser light...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUURA Kento, OKAMOTO Ryota, AOKI Takayuki
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSES PRESSES IN GENERAL PUNCHING METAL SAFETY DEVICES IN GENERAL THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	A projector (30) emits laser light (L30) in such a way that the laser light passes through between a punch (14) and a die (24). An optical receiver (41) includes a photodetector, and determines whether the optical receiver is in a light receiving state or a light obstructing state of the laser light (L30). When an upper table (10) is lowered, a safety controller (42) controls lowering of the upper table (10) to stop, when it is determined that the optical receiver (41) is in the light obstructing state in a period in which a condition is satisfied that a first distance between a tip of the punch (14) and an upper end of a material (W) is equal to or greater than a second distance between the tip of the punch (14) and the photodetector, and controls the lowering to continue without stopping the lowering of the upper table (10) even when it is determined that the optical receiver (41) is in the light obstructing state in a period in which a condition is satisfied that the first distance is less than the second distance.