Autonomous winch with grip pulley

A winch with a grip pulley for moving along a lifting strand, in particular a rope or cable, comprising:

• a frame having, in service, an upper region facing towards a portion of the lifting strand under tension and a lower region on a slack strand side of the lifting strand;
• a grip pulley mounted on the frame, the grip pulley having a groove disposed on a periphery of the grip pulley, the grip pulley enabling the lifting strand to be hauled by grip;
• a guide means capable of guiding the lifting strand under tension from the upper region of the frame towards the lower region thereof, the guide means further comprising on the lower region side of the frame a guide pulley arranged below and close to said grip pulley and transferring the taut lifting strand onto the grip pulley;
• and
• a clamping pulley, arranged below the grip pulley and close to the guide pulley, exerting pressure on the lifting strand towards the grip pulley and acting on a wrapped end of the lifting strand on the grip pulley on the slack strand side;
• wherein the guide pulley and the clamping pulley are positioned in such a manner that the lifting strand is engaged in said groove over an angle of at least 280°;
• and
• wherein the lifting strand exits from the grip pulley on the lower region side of the frame.