CRANK SCISSORS HAVING TWO PAIRS OF BLADES FOR CUTTING ROLLING STRIPS

The invention relates to crank scissors, especially for cutting rolling strips (22), comprising two pairs of blades (3, 4) which can be secured to blade carriers (1, 2). The blade carriers (1, 2) are arranged in an opposite position on a vertical plane (x-x) in a pair of eccentric drive shafts (5, 6). Double-joint arrangements (9, 10) are maintained in a pivoatable manner on torque- supporting levers (7, 8) co-operating with hydraulic control units (11, 12) engaging thereon. Said type of crank scissors can be improved by enabling the blade carriers (1, 2) to form pairs of bearing surfaces (16- 19), which are parallel to the axis, for the pairs of blades (3, 4) on approximately radial projections (13-15), whereon the upper pair of blades (3) is arranged on the inner, bearing surfaces (16, 17) of an arc- shaped recess (20) of the upper blade carrier (1) which are orientated towards each other, and the lower pair of blades (4) is arranged on a relatively narrow projection (15) on the outer bearing surfaces (19, 18) thereof.