Thread-guiding device for a workstation of a textile machine which produces cross-wound bobbins

Abstract

Thread-guiding device for a workstation of a textile machine which produces cross-wound bobbins. The workstation has an unwinding aid device for feed bobbins, a winding device for producing a cross-wound bobbin and a thread-guiding channel which surrounds the thread path and which can be subjected to negative pressure. The thread-guiding device is installed at the end face of the thread-guiding channel in the region of a suction head above the regular thread path in the workstation and is designed such that during a thread cutting process initiated during the winding operation, the thread end of the newly created upper thread, said thread end shooting upwards as a result of the thread tension in the running thread, enters the thread-guiding device and is guided in a controlled manner by the thread-guiding device in the direction of the center of the cross-wound bobbin.

1 . A thread-guiding device for a workstation of a textile machine which produces cross-wound bobbins, wherein the workstation has an unwinding aid device for feed bobbins, a winding device for producing a cross-wound bobbin and a thread-guiding channel which surrounds a thread path and which can be subjected to negative pressure, wherein the thread-guiding device is installed at an end face of the thread-guiding channel in a region of a suction head above the thread path in the workstation and is designed such that during a thread cutting process initiated during a winding operation, a thread end of a newly created upper thread, the thread end shooting upwards as a result of a thread tension in a running thread, enters the thread-guiding device and is guided in a controlled manner by the thread-guiding device in a direction of a center of the cross-wound bobbin. 
     
     
         2 . The thread-guiding device according to  claim 1 , wherein the thread-guiding device has a thread-guiding plate with a mirror-image thread-guiding contour. 
     
     
         3 . The thread-guiding device according to  claim 2 , wherein the thread-guiding device has an upper connecting strip arranged at a distance from the thread-guiding plate. 
     
     
         4 . The thread-guiding device according to  claim 2 , wherein the mirror-image thread-guiding contour is formed by two guiding surfaces arranged in mirror image, which in each case have a concavely curved thread-guiding region and an adjoining convexly curved thread-braking slot. 
     
     
         5 . The thread-guiding device according to  claim 3 , wherein the mirror-image thread-guiding contour has two linear, converging thread-guiding regions. 
     
     
         6 . The thread-guiding device according to  claim 5 , wherein the thread-guiding regions are arranged at a first angle with respect to an outer edge of the thread-guiding device and at a second angle relative to one another, wherein an intersection point of the thread-guiding regions is positioned at a distance with respect to the upper connecting strip. 
     
     
         7 . The thread-guiding device according to  claim 5 , wherein the two thread-guiding regions, which in each case have a length corresponding to approximately ⅔ of a length of the thread-guiding device, are arranged at an angle relative to one another and an intersection point of the thread-guiding regions is positioned in a region of the upper connecting strip. 
     
     
         8 . The thread-guiding device according to  claim 5 , wherein the two thread-guiding regions are arranged at an angle relative to one another and an intersection point of the thread-guiding regions is positioned at a distance from the upper connecting strip. 
     
     
         9 . The thread-guiding device according to  claim 5 , wherein the two thread-guiding regions are arranged at an angle relative to one another, an intersection point of the thread-guiding regions is positioned in a region of the upper connecting strip and the thread-guiding regions have a length that corresponds approximately to a length of the thread-guiding device. 
     
     
         10 . The thread-guiding device according to  claim 5 , wherein the mirror-image thread-guiding contour has two relatively short linear thread-guiding regions which are arranged at an angle relative to one another and an intersection point thereof is positioned at a distance from the upper connecting strip. 
     
     
         11 . The thread-guiding device according to  claim 2 , wherein the mirror-image thread-guiding contour has two linear thread-guiding regions overlapping at an end face, wherein an overlapping point is arranged almost centrally with respect to the thread-guiding device. 
     
     
         12 . The thread-guiding device according to  claim 2 , wherein the mirror-image thread-guiding contour is formed by two separate, relatively short thread-stabilizing projections pointing towards a central axis of the thread-guiding device. 
     
     
         13 . The thread-guiding device according to  claim 2 , wherein the mirror-image thread-guiding contour has two separate thread-catching arms pointing almost towards a central axis of the thread-guiding device, which in each case have a short linear thread-guiding region and an adjoining corrugated thread-guiding surface. 
     
     
         14 . The thread-guiding device according to  claim 5 , wherein the mirror-image thread-guiding contour has a convexly curved thread-guiding region provided with a hook projection on both sides in each case and an intersection point of the thread-guiding regions is positioned at a distance from the upper connecting strip. 
     
     
         15 . The thread-guiding device according to  claim 3 , wherein the mirror-image thread-guiding contour has two linear thread-guiding regions, in each case having a bend, wherein an intersection point of the two linear thread-guiding regions that are angled is positioned in a region of the upper connecting strip.