The present invention refers to a configuration of the pulleys and ropes so as to obtain the cage suspension of the size ratio type at least equal to 1:2 or greater (1:4, 1:6, 1:8, etc) and the suspension of a balance weight always equal to 1:2 in size ratio, formed such that the path of the balance weight is equal to the path of the cage. The ropes going from the traction pulley towards the balance weight pass between the pulleys placed on the cage and the pulleys placed in the lower portion of the shaft, such that the portion of the suspension ratio not obtained between the balance weight and the upper portion of the shaft is realized between the cage and the lower portion of the shaft, so as to equalize on the whole the suspension ratio between the cage and the upper portion of the shaft.