Optical safety device for press brake, press brake, and optical monitoring method

摘要

Problem to be solved: to ensure the safety of the bending work and to sufficiently improve the working efficiency of the press brake.A light receiver 68 for projecting the monitoring light B on one side in the left and right direction of the upper table 26 is provided, and a light receiving device 76 for receiving the monitoring light B on the other side of the upper table 26 is provided.The press brake 10 determines whether the shadow enlarging judging portion 84 for judging whether or not the mold shadow s of the upper mold 12 expands to the light receiving element 78 of the light receiver 76 and the mold shadow s of the upper mold 12 are expanded to the light receiving element 78 The cooling portion 62 for driving the cooling portion 62 for cooling the upper mold 12 is provided.Diagram