Device for loading yarn collection tubes onto the spindle faces of spinning machines and twisting frames

Device for loading yarn collection tubes onto the spindle faces of spinning machines and twisting frames, comprising a carriage mobile horizontally at a constant speed from one end of the spindle face to the other, and a magazine having an inclined base disposed on said carriage and designed to contain the empty tubes in a substantially horizontal position, a first conveyor formed from a succession of cup elements open at their ends, made to move along a vertical path passing in front of the outlet of said magazine to collect said tubes one at a time and convey them into a predetermined discharge position, means associated with said first conveyor to rotate said cup elements into the vertical position to discharge the tubes by free fall when they reach said discharge position, means sensitive to the orientation of the tubes in said cup elements which cause said rotation means to rotate said cup elements into the vertical position in one direction or the other according to the orientation sensed, a second conveyor formed from a succession of vertical seats for housing individual tubes and made to move, at a speed relative to the carriage equal to the relative speed between the carriage and the spindle face, along a horizontal path, said second conveyor comprising a first tube collection portion which passes below said discharge position of the first conveyor and a second tube delivery position passing above the spindle face and provided with motion in a direction opposite to that of the carriage so that it is at rest relative to the spindle face, and means associated with said second conveyor to retain the tubes in said seats at said first path portion and until the beginning of the second portion and then release them and allow them to fall onto the spindles at said second portion.