FIELD: mechanical engineering; materials handling equipment; transmission of data on operating settings of crane and recommendations on safety according to selected display mode. SUBSTANCE: crane safety device serves for dynamic reproduction of schematic diagram of some part of crane mechanism of two-dimensional screen during operation of crane mechanism and showing on the same screen the definite working zone in the form of visually standing out zone picture. Working zone picture is reproduced on screen by order from press button activated by operator at preset mode of crane operation in combination with schematic diagram of crane mechanism represented on screen at current moment. EFFECT: improved safety of operation. 2 cl, 19 dwg
