Creel Loading and Relieving Device for a Winding Device of a Textile Machine Producing Cross-Wound Bobbins

Abstract

A creel loading and relieving device for a winding device of a textile machine producing crosswound bobbins adjusts the contact pressure of a take-up bobbin mounted in a creel on a driving roll. The creel loading and relieving device comprises a creel pivotally mounted via a creel shaft and a force applying means which grips the creel and is adjustable via a positioning element. The creel loading and relieving device ( 30 ) has an actuator ( 33 ) that can be positioned by an electromotive drive ( 40 ) while a force applying means ( 29 ) which impinges upon the creel ( 9 ) is disposed on said actuator ( 33 ). The force applying means is configured as a pneumatic spring ( 29 ) and is hinged to a first lever arm ( 25 ) connected to a creel yoke ( 24 ). The loading or relieving moment applied to the creel ( 9 ) by the pneumatic spring ( 29 ) can be adjusted with precision by positioning the actuator ( 33 ).

1 . Creel loading and relieving device for a winding device of a textile machine producing cross-wound bobbins, for adjusting the contact pressure of a take-up bobbin mounted in a creel on a drive roller, comprising a creel, which is pivotally mounted by a creel shaft, and a force introduction means, which engages on the creel and can be adjusted via an adjusting element, characterized in that the creel loading and relieving device ( 30 ) has an actuator ( 33 ) which can be positioned by means of an electromotive drive ( 40 ), in that a force introduction means which acts upon the creel ( 9 ) and is configured as a pneumatic spring ( 29 ), is arranged on the actuator ( 33 ), in that the pneumatic spring ( 29 ) is articulated to a first lever arm ( 25 ) that is connected to a creel yoke ( 24 ) and in that the loading or relieving moment to be applied to the creel ( 10 ) by the pneumatic spring ( 29 ) can be adjusted with precision by positioning the actuator ( 33 ) accordingly. 
   
   
       2 . Creel loading and relieving device according to  claim 1 , characterized in that the electromotive drive ( 40 ) is connected to the actuator ( 33 ) via a self-locking worm gear ( 36 ). 
   
   
       3 . Creel loading and relieving device according to  claim 1 , characterized in that the actuator is configured as a segment of a circle-like hollow component ( 33 ), comprising a bearing point ( 34 ), a tooth segment ( 35 ), arranged in the region of a peripheral section, of worm wheel teeth and an abutment ( 32 ) for the force introduction means ( 29 ). 
   
   
       4 . Creel loading and relieving device according to  claim 2 , characterized in that the actuator ( 33 ) is mounted via the bearing point ( 34 ) so as to be rotatable to a limited extent on the creel shaft ( 23 ) of the creel ( 9 ). 
   
   
       5 . Creel loading and relieving device according to  claim 1 , characterized in that the electromotive drive is configured as a stepping motor ( 40 ) and a worm ( 37 ) of the worm drive ( 36 ) is fixed on a motor shaft ( 41 ) of the stepping motor. 
   
   
       6 . Creel loading and relieving device according to  claim 1 , characterized in that a thrust piston gearing acting as a pneumatic spring ( 29 ) is connected to a compressed air ductwork system of the textile machine ( 1 ) producing cross-wound bobbins via a pneumatic line ( 38 ). 
   
   
       7 . Creel loading and relieving device according to  claim 6 , characterized in that the thrust piston gearing ( 29 ) is acted upon with constant pressure. 
   
   
       8 . Creel loading and relieving device according to  claim 1 , characterized in that a second lever arm ( 39 ), to which a damper cylinder ( 42 ) is articulated, is arranged on the creel yoke ( 24 ). 
   
   
       9 . Creel loading and relieving device according to  claim 8 , characterized in that the damper cylinder ( 42 ) can be acted upon with pressure in a defined manner to lift the cross-wound bobbin ( 8 ) from the drive roller ( 11 ).