Device for positioning a roller or for tensioning a belt, drawing device, spinning unit and spinning machine comprising such a device

Abstract

The invention relates to a device for positioning at least one roller in a drawing device and/or in a spinning unit, and/or for tensioning at least one belt, in particular a running belt, in a drawing device and/or in a spinning unit, wherein the device comprises: the at least one roller which is rotatably mounted, the at least one belt, in particular a running belt, at least one tension rod, and at least one guide device for contacting the belt at at least one contact point for guiding the belt during operation of the at least one roller. In order to improve and simplify the process of changing the belt, the at least one guide device is arranged and designed in such a way as to make the lower roller reversibly accessible for removing the belt and/or threading the belt, in particular without changing the relative positions of the roller, tension rod and/or belt to one another.

1 . A device ( 10 ) for positioning at least one roller ( 6 ) in a drawing device ( 100 ) and/or in a spinning unit ( 200 ), and/or for tensioning at least one belt ( 1 ), in particular a running belt, in a drawing device ( 100 ) and/or in a spinning unit ( 200 ), wherein the device ( 10 ) comprises:
 the at least one roller ( 6 ) which is rotatably mounted,   the at least one belt ( 1 ), in particular a running belt,   at least one tension rod ( 4 ), and   at least one guide device ( 20 ) for contacting the belt ( 1 ) at at least one contact point ( 21 ) in order to guide the belt ( 1 ) during operation of the at least one roller ( 6 ),   wherein the tension rod ( 4 ) and the roller ( 6 ) are designed and arranged in such a way that the belt ( 1 ) is arranged for operation in such a way that it runs around at least part of the roller ( 6 ) in a contact region ( 30 ), and   wherein the tension rod ( 4 ) and the roller ( 6 ) are designed and arranged in such a way that the belt ( 1 ) is arranged for operation in such a way that it runs around at least part of the tension rod ( 4 ),   wherein the tension rod ( 4 ) and the roller ( 6 ) are designed and arranged relative to one another in such a way that the belt ( 1 ) runs around the tension rod ( 4 ) and the roller ( 6 ) in a tensioned manner during operation of the at least one roller ( 6 ),   wherein the belt ( 1 ) can be guided by the at least one guide device ( 20 ) during circulation, and   wherein the at least one guide device ( 20 ) is arranged and designed in such a way that the roller ( 6 ), in particular designed as a lower roller, is reversibly accessible for removing the belt ( 1 ) and/or threading the belt ( 1 ), in particular without changing the relative positions of the roller ( 6 ), tension rod ( 4 ) and/or belt ( 1 ) to one another.   
     
     
         2 . The device ( 10 ) according to  claim 1 , characterized in that the guide device ( 20 ) is arranged and designed in such a way as to interrupt the contact between the guide device ( 20 ) and the at least one belt ( 1 ), the at least one roller ( 6 ), the at least one belt ( 1 ) and the at least one tension rod ( 4 ) being designed and arranged in such a way as to retain their positions relative to one another when the contact between the guide device ( 20 ) and the belt ( 1 ) is interrupted. 
     
     
         3 . The device ( 10 ) according to  claim 1 , characterized in that the guide device ( 20 ) is arranged so as to be reversibly removable relative to at least one of the at least one roller ( 6 ), the at least one belt ( 1 ) and/or the at least one tension rod ( 4 ) in order to remove the guide device ( 20 ) so that the belt can be removed from the tension rod ( 4 ) and/or the roller ( 6 ), the relative position between the guide device ( 20 ), the belt ( 1 ) and the roller ( 6 ) being maintained when the guide device ( 20 ) is removed; or
 the guide device ( 20 ) being reversibly mountable relative to at least one of the roller ( 6 ), the belt ( 1 ) and/or the tension rod ( 4 ) in order to mount the guide device ( 20 ) after the belt has been threaded onto the tension rod ( 4 ) and/or the roller ( 6 ), the relative position between the guide device ( 20 ), the belt ( 1 ) and the roller ( 6 ) being maintained when the guide device ( 20 ) is mounted.   
     
     
         4 . The device ( 10 ) according to  claim 1 , characterized in that the roller is rotatably mounted in a bearing block ( 25 ), the bearing block ( 25 ) and the guide device ( 20 ) forming a functional unit ( 5 ) which is designed and arranged in such a way that, when the functional unit ( 5 ) is mounted, the belt ( 1 ) is contacted at a contact point ( 21 ) by the guide device ( 20 ). 
     
     
         5 . The device ( 10 ) according to  claim 1 , characterized in that the bearing block ( 25 ) is designed to be at least partially removable in order to remove part of the bearing block ( 25 ) from the functional unit ( 5 ) in order to interrupt the contact between the guide device ( 20 ) and the belt ( 1 ); or
 the removable part of the functional unit ( 5 ) of the bearing block ( 25 ) being mountable in such a way as to mount the removable part of the bearing block ( 25 ) in the functional unit ( 5 ) in order to establish the contact between the guide device ( 20 ) and the belt ( 1 ) after the belt ( 1 ) has been threaded onto the tension rod ( 4 ) and/or the roller ( 6 ).   
     
     
         6 . The device ( 10 ) according to  claim 1 , characterized in that the bearing block ( 25 ) can be reversibly removed from a base ( 19 ), in particular on a pedestal with a sliding guide ( 18 ), in such a way that the bearing block ( 25 ) can be removed from the device ( 10 ) in order to interrupt the contact between the guide element ( 20 ) and the belt ( 1 ); or
 the bearing block ( 25 ) being reversibly mountable on a base ( 19 ), in particular on a pedestal with a sliding guide ( 18 ), in such a way that the bearing block ( 25 ) can be inserted into the device ( 10 ) in order to reestablish the contact between the guide element ( 20 ) and the belt ( 1 ) after the belt has been threaded onto the tension rod ( 4 ) and/or the roller ( 6 ).   
     
     
         7 . The device ( 10 ) according to  claim 1 , characterized in that the bearing block ( 25 ) can be removed from the device ( 10 ) in parallel with an axis of rotation ( 3 ) of the at least one roller ( 6 ), in particular by it being possible for it to be pulled out of the device ( 10 ) in parallel with the axis of rotation ( 3 ) via a sliding guide ( 18 ) in order to remove the belt ( 1 ) from the tension rod ( 4 ) and the roller ( 6 ); or
 the bearing block ( 25 ) being introducible into the device ( 10 ) in parallel with an axis of rotation ( 3 ) of the at least one roller ( 6 ), in particular by it being possible for it to be inserted into the device ( 10 ) in parallel with the axis of rotation ( 3 ) via a sliding guide ( 18 ) after the belt ( 1 ) has been threaded over the tension rod ( 4 ) and the roller ( 6 ).   
     
     
         8 . The device ( 10 ) according to  claim 1 , characterized in that the bearing block ( 25 ) can be reversibly fastened at a right angle to a drafting plane by means of a fastening device, in particular by means of a screw. 
     
     
         9 . The device ( 10 ) according to  claim 1 , characterized in that the pedestal ( 19 ) and the sliding guide ( 18 ) are designed such that they interact to form a maximum insertion of the bearing block ( 25 ) such that the bearing block ( 25 ) and the guide device ( 20 ) can be positioned in a reproducible manner with repeated insertion, in particular relative to the at least one roller ( 6 ) and/or the at least one tension rod ( 4 ). 
     
     
         10 . A drawing device ( 100 ) comprising a device ( 10 ) according to  claim 1 . 
     
     
         11 . A spinning unit ( 200 ) comprising a device ( 10 ) according to  claim 1 . 
     
     
         12 . The spinning unit ( 200 ) according to  claim 11 , characterized in that the drawing device ( 100 ) and/or the device ( 10 ) are arranged and designed such that the mounted guide element ( 20 ) is accessible for removing the guide element ( 20 ) in such a way that the positions of the roller ( 6 ), the belt ( 1 ) and the tension rod ( 4 ) relative to one another, relative to the drawing device ( 100 ) and/or relative to the spinning unit ( 200 ) are maintained while removing the guide element ( 20 ); or
 the drawing device ( 100 ) and/or the device ( 10 ) being arranged and designed such that, when the guide element ( 20 ) is removed, the roller ( 6 ) and/or the tension rod ( 4 ) are accessible for threading the belt ( 1 ) over the roller ( 6 ) and/or the tension rod ( 4 ), in particular the positions of the roller ( 6 ) and the tension rod ( 4 ) relative to one another and/or relative to the spinning unit ( 200 ) being maintained while threading the belt ( 1 ) and/or while mounting the guide element ( 20 ).   
     
     
         13 . A spinning machine comprising a spinning unit ( 200 ) according to  claim 11 . 
     
     
         14 . The spinning machine according to  claim 13 , characterized in that the spinning machine, the spinning unit ( 200 ), the drawing device ( 100 ) and/or the device ( 10 ) are arranged and designed in such a way that the mounted guide element ( 20 ) is accessible for removing the guide element ( 20 ) in such a way that the positions of the roller ( 6 ), the belt ( 1 ) and the tension rod ( 4 ) relative to one another and/or relative to the drawing device ( 100 ), relative to the spinning unit ( 200 ) and/or relative to the spinning machine are maintained while removing the guide element ( 20 ); or
 the spinning machine and/or drawing device ( 100 ) and/or the device ( 10 ) being arranged and designed such that, when the guide element ( 20 ) is removed, the roller ( 6 ) and/or the tension rod ( 4 ) are accessible for threading the belt ( 1 ) over the roller and/or the tension rod ( 4 ), in particular the positions of the roller ( 6 ) and the tension rod ( 4 ) relative to one another and/or relative to the spinning unit ( 200 ) and/or relative to the drawing device ( 100 ) being maintained while threading the belt ( 1 ) and/or while mounting the guide element ( 20 ).