Winch provided with adjustable self-tailing and relative operation

A nautical winch comprising:

• a) a fixed stator body;
• b) a rotor body coupled to the stator body, said rotor body being able to rotate around a longitudinal axis (A-A) to wind a rope on an outer surface of the rotor body;
• c) a self-tailing device in turn comprising two half-pulleys, a lower half-pulley and an upper half-pulley, mounted opposite one another and coaxial to the rotor body, said half-pulleys defining, at the upper portion of the outer surface of the rotor body, a circumferential throat intended to at least partially house a winding of said rope, wherein one half-pulley is fixed with respect to said rotor body and the other half-pulley is moveable parallel to said longitudinal axis (A-A) to vary the dimensions of said circumferential throat;
• d) an adjustment device for adjusting the position of the moveable half-pulley along said longitudinal axis (A-A) by moving the moveable half-pulley from a hold position closer to the fixed half-pulley than a release position further away from the fixed half-pulley, wherein in the hold position the moveable half-pulley and the fixed half-pulley are able to hold the rope therebetween in at least an angular position around the axis (A-A) while in the release position the moveable half-pulley and the fixed half-pulley leave the rope completely free in any angular position around the axis (A-A), the adjustment device being able to be activated by a user in all conditions of use of the nautical winch;
• and
• e) a thrusting means for thrusting said moveable half-pulley, suitable for constantly exerting a return force of the moveable half-pulley towards the fixed half-pulley;
• wherein said adjustment device comprises a counteraction means for counteracting the force exerted by said thrusting means and control element for controlling said counteraction means, accessible to the user outside of the nautical winch;
• wherein said thrusting means comprises one or more thrusting elements arranged between said moveable half-pulley and a non-mobile portion of the nautical winch along said longitudinal axis (A-A);
• wherein said counteraction means comprise a rotary pin able to rotate on said longitudinal axis (A-A), and a bushing arranged coaxial to said rotary pin and equipped with outer arms arranged in abutment against said moveable half-pulley, on the opposite side with respect to said one or more thrusting elements, wherein said rotary pin and said bushing are coupled to one another by means of a cam and cam-follower coupling based on which the rotary movements of said rotary pin determine corresponding translation movements of said bushing along said longitudinal axis (A-A).