Device for the automatic doffing of bobbins in a crosswinding machine

Abstract

The invention relates to a device for the automatic doffing of bobbins in a crosswinding machine, of the type comprising a rolling chute ( 5 ) on which the bobbin is free to roll towards a conveyor belt ( 4 ), wherein said rolling chute ( 5 ) is hinged around a rotation pin ( 8 ), around which it can rotate varying the level difference between its ends, a flap ( 9 ) being hinged to the end of said rolling chute ( 5 ) facing the conveyor belt ( 4 ), whose portion facing the conveyor belt ( 4 ) slides on a fixed supporting counter-edge ( 11 ).

1 . A device for the automatic doffing of bobbins in a crosswinding machine, of the type comprising a rolling chute ( 5 ) on which the bobbin is free to roll towards a conveyor belt ( 4 ), characterized in that said rolling chute ( 5 ) is hinged around a rotation pin ( 8 ), around which it can rotate varying the level difference between its ends, a flap ( 9 ) being hinged to the end of said rolling chute ( 5 ) facing the conveyor belt ( 4 ), whose portion facing the conveyor belt ( 4 ) slides on a fixed supporting counter-edge ( 11 ).  
   
   
       2 . The device for the automatic doffing of bobbins in a crosswinding machine according to  claim 1 , characterized in that the raising of the end of the rolling chute ( 5 ) facing the formation position of the bobbin ( 1 ) leads to a lowering of its opposite end and the end of the flap ( 9 ) hinged thereto, said flap ( 9 ) being forced to rotate around the hinge ( 10 ) by the constraint consisting of said supporting counter-edge ( 11 ), forming an angled position with respect to the rolling chute ( 5 ) and together with this forming a depression, in correspondence with the hinge ( 10 ).  
   
   
       3 . The device for the automatic doffing of bobbins in a crosswinding machine according to  claim 1 , characterized in that the raising of the end of the rolling chute ( 5 ) facing the formation position of the bobbin ( 1 ) is caused by the direct action of a counter-edge element ( 7 ) integral with the bobbin-holder arm ( 2 ).  
   
   
       4 . The device for the automatic doffing of bobbins in a crosswinding machine according to  claim 1 , characterized in that the return of the end of the rolling chute ( 5 ) facing the formation position of the bobbin ( 1 ) to the position it occupies during the bobbin formation phases, is caused by the difference in weight between the portions of the rolling chute ( 5 ) opposing the rotation pin ( 8 ), or by the direct action of a counter-edge element (not shown) integral with the bobbin-holder arm ( 2 ) or by recalling means.  
   
   
       5 . The device for the automatic doffing of bobbins in a crosswinding machine according to  claim 1 , characterized in that it comprises a stopping element ( 6 ), integral with the structure of the crosswinding head, which, when the end of the rolling chute ( 5 ) facing the formation position of the bobbin ( 1 ) is not sufficiently raised, crosses the surface of the rolling chute ( 5 ) in correspondence with an opening.