Service unit for a textile machine producing cheeses

Abstract

A service unit for the automatic servicing of work stations of a textile machine for manufacturing cheeses, in particular for an open-end rotor spinning machine. The service unit comprises a pneumatic auxiliary yarn supply and removal device with a pivotably supported yarn supply tube and a yarn cutting device. The yarn cutting device is arranged on a centering and guide sheet in such a manner that it is positioned in the operating position of the centering and guide sheet adjacent the yarn catch device of a tube plate supported in a freely rotatable manner in a creel of the respective work station.

We claim:  
     
         1 . A service unit for automatically servicing a work station of a textile machine for manufacturing cheeses, the service unit comprising: 
 a pneumatic auxiliary yarn supply,    a removal device with a pivotably supported yarn supply tube, and    a yarn cutting device arranged on a centering and guide sheet in an operating position of the centering and guide sheet adjacent a yarn catch device of a tube plate supported in a freely rotatable manner in a creel of the work station.    
     
     
         2 . The service unit according to  claim 1 , wherein the centering and guide sheet is movable by a thrust piston transmission into the operating position, in which a centering slot of the centering and guide sheet corresponds with a centering shoulder on the creel and precisely positions the yarn cutting device.  
     
     
         3 . The service unit according to  claim 1 , wherein the yarn cutting device comprises a hook-shaped, partially open main body with an integrated fixed edge.  
     
     
         4 . The service unit according to  claim 3 , wherein the fixed edge has a cutting edge at essentially a 45° angle from a side view and facing the middle of the main body.  
     
     
         5 . The service unit according to  claim 1 , wherein the centering and guide sheet carrying the yarn cutting device has a yarn guide slot adjacent to a centering slot.  
     
     
         6 . The service unit according to  claim 1 , wherein the textile machine is an open-end rotor spinning machine.