Cable lifting apparatus

Cable lifting apparatus for moving loads with the use of several cables (1) coupled to an equal number of peripheral grooves (2) of a single traction pulley (3), and consisting of a power plant (6) formed by a motor, brake, centrifugal brake and reducer on a support axle (7), a housing (8) which can be fixed to the load to be lifted, and where the mentioned support axle (7) is housed, a pivoting structure (9) in regard to the axle (7), capable of pivoting in regard to the aforementioned housing (8) and that includes inside a pinion coupled to the output of the reducer of the power plant (6) and geared to a supporting toothed wheel (10), concentric in regard to a rotation on the axle (5) with the traction pulley (3), and likewise consisting of some pressure rollers (11) used for applying adequate pressure to the mentioned cables (1) when the structure (9) pivots on the mentioned axle (7) and on which each of the suspension cables (1) is pressed by a independent series of rollers (11), characterised in that the peripheral grooves (2) of the traction pulley (3) are defined by several independent adjacent plates (3a, 3b, 3c) with bevelled peripheral edges, in equal number to the grooves (2) plus one, provided with lateral displacement by balancing forces through a bushing (4) located on the turning axle (5), and in that each of the independent roller units (11) that press the suspension cables (1) against the peripheral grooves (2) of the traction pulley (3) are mounted on a swinging support plate (12), linked through a turning axle (13) to another second plate (14), or arm that at one end is linked to the casing (8) by means of a second turning axle (15), as well as having an elastic element (16) located between the afore-mentioned second plate (14) and the wall of the casing (8).