Device for supporting a cable of a capstan of a crane

A device for supporting a cable of a capstan of a crane, comprising:

• a main supporting structure;
• a pulley rotatably supported by the main supporting structure, adapted to guide said cable of the capstan;
• and
• a sensor for measuring the angular position of the pulley,
• wherein the pulley comprises an auxiliary crown having a plurality of projecting elements disposed along the circumference thereof, and said sensor comprises a stationary body integral with the main supporting structure and a wheel, rotatable with respect to the stationary body, comprising a deformable crown which meshes with the auxiliary crown of the pulley and is made of a material such to deform due to the engagement of said projecting elements, wherein said sensor further comprises means for detecting the angular position of the wheel with respect to the stationary body of the sensor,
• wherein said deformable crown is made of an elastomeric material.