Tensioning device and spinning machine

Abstract

A tensioning device for a spinning unit and/or stretching device. The tensioning device includes at least one roller, at least one belt, and at least one tension rod. The tensioning device can be transferred from a functional state into a non-functional state. The functional state is designed for positioning position the at least one roller in that the belt is designed and arranged for exerting a tension on the roller, in that the belt is further designed and arranged for running around a section of the roller and a section of the tension rod such that a tension is transferred from the tension rod onto the roller via the belt. In the non-functional state, the tensioning device is designed and configured such as to move the tension rod via tension on the belt, for removing the belt from the tension rod.

1 . A tensioning device for a spinning unit and/or stretching device, comprising:
 at least one roller;   at least one belt; and   at least one tension rod;   wherein the tensioning device is designed and configured such as to be transferred from a functional state into a non-functional state;   wherein, in the functional state, the at least one roller is positioned in that the at least one belt is designed and arranged for exerting a tension on the at least one roller, in that the at least one belt is further designed and arranged for running around a section of the at least one roller and a section of the at least one tension rod such that a tension is transferred from the at least one tension rod onto the at least one roller via the at least one belt; and   wherein, in the non-functional state, the tensioning device is designed and configured such as to move the at least one tension rod via tension on the at least one belt for removing the at least one belt from the at least one tension rod.   
     
     
         2 . The tensioning device according to  claim 1 , wherein a transfer from the functional state to the non-functional state is reversible. 
     
     
         3 . The tensioning device according to  claim 1 , further including at least one fastening device which is designed and arranged such as to connect the at least one tension rod to a main body, wherein loosening the at least one fastening device causes the tensioning device to be transferred from the functional state into the non-functional state. 
     
     
         4 . The tensioning device-according to  claim 3 , further including at least one locking device which is designed and arranged such as to, in the functional state, lock the at least one tension rod in at least one direction; and
 wherein the at least one locking device is further designed and arranged such as to, in the non-functional state, moveably release the at least one tension rod in at least one direction for moving the at least one tension rod via the tension of the at least one belt.   
     
     
         5 . The tensioning device according to  claim 4 , wherein the at least one locking device is fixedly arranged on the at least one tension rod in a socket, wherein, in the functional state, the at least one locking device locks the at least one tension rod in the at least one direction in a corresponding receiving region in the main body; or
 wherein the at least one locking device is fixedly arranged on the main body in the socket, wherein, in the functional state, the at least one locking device locks the at least one tension rod in the corresponding receiving region in the at least one tension rod in the at least one direction.   
     
     
         6 . The tensioning device according to  claim 5 , wherein the corresponding receiving region is designed and arranged such as to determine a maximum play for the at least one locking device in the at least one direction in the corresponding receiving region for moving the at least one locking device in the corresponding receiving region in the at least one direction for a transfer into the non-functional state. 
     
     
         7 . The tensioning device according to  claim 5 , wherein the corresponding receiving region is designed and arranged such that, in the functional state, the at least one locking device is in contact with a region for locking in the at least one direction, wherein a play is provided, such as to lose contact with the region when transferred into the non-functional state by moving the at least one tension rod, or such as to contact a different region when transferred into the non-functional state. 
     
     
         8 . The tensioning device according to  claim 5 , wherein the at least one locking device is a longitudinal positioning pin. 
     
     
         9 . The tensioning device according to  claim 1 , wherein movement of the at least one tension rod is a tilting about a first axis and/or a rotation about a second axis. 
     
     
         10 . The tensioning device according to  claim 3 , further including at least one movement guide device which is designed and arranged for guiding movement of the at least one tension rod during a transfer into the non-functional state. 
     
     
         11 . The tensioning device according to  claim 10 , wherein the at least one movement guide device is a position pin which is arranged in a socket of the main body and is arranged and designed such as to be received in a receptacle in the at least one tension rod for moving the at least one tension rod relative to the position pin in a play of the receptacle during the transfer into the non-functional state. 
     
     
         12 . The tensioning device according to  claim 3 , wherein the main body is a bottom roller support. 
     
     
         13 . The tensioning device according to  claim 1 , wherein the at least one tension rod is designed and arranged to, in the functional state, protrude with a section of the at least one tension rod around which the at least one belt runs. 
     
     
         14 . The tensioning device according to  claim 1 , wherein the at least one one roller is one of a front bottom roller, a middle bottom roller, and/or a third bottom roller of a spinning unit or a stretching device. 
     
     
         15 . A spinning unit comprising the tensioning device according to  claim 1 . 
     
     
         16 . A spinning machine comprising the spinning unit according to  claim 15 .