Top roller carrier for drafting systems in spinning machines
A top roller carrier for drafting systems in spinning machines with at least one pair of feed rollers, one pair of apron rollers and one pair of output rollers as top rollers and with holding devices for the top rollers, and wherein the top rollers are rotatably mounted on the ends of axles which are held centrally between the top rollers. According to the present invention, a common holding device is provided for the axle of the output rollers and the axle of the apron rollers and is movably connected to the top roller carrier and fixes the two axles at a rigid spacing with respect to one another.
1. Top roller carrier for drafting systems in spinning machines with at least one pair of feed rollers, one pair of apron rollers and one pair of output rollers as top rollers and with holding devices for the top rollers, wherein the top rollers are rotatably mounted on the ends of axles and the axles are held centrally, in each case, between the top rollers, wherein a common holding device ( 2 , 41 ) is provided for the axle ( 5 , 51 ) of the output rollers ( 8 , 43 ) and the axle ( 6 , 50 ) of the apron rollers ( 7 , 42 ) and is movably connected to the top roller carrier ( 1 , 40 ), characterized in that the holding device ( 2 , 41 ) with the axle receivers ( 3 , 4 , 48 , 49 ) for the axles ( 5 , 6 , 50 , 51 ) of the output rollers ( 8 , 43 ) and of the apron rollers ( 7 , 42 ) comprises a one-piece component made of plastics material, so that the axle receivers ( 3 , 4 , 48 , 49 ) are arranged at a rigid spacing with respect to one another, and in that a top apron deflection device is part of the one-piece component.
2. Top roller carrier according to claim 1 , characterized in that the top apron deflection device is configured as a vane ( 23 , 30 , 65 ) and ends at the free end with a deflection edge ( 25 ).
3. Top roller carrier according to claim 1 ,characterized in that the top apron deflection device is configured as a vane ( 30 ), on the free end of which a chromium-plated replaceable metal bar ( 32 ) is fastened for the deflection of top aprons ( 24 , 26 ) and wherein the metal bar ( 32 ) can alternatively be positioned in at least two positions.
4. Top roller carrier according to claim 1 , characterized in that the holding device ( 2 , 41 ) has a slot ( 33 , 64 ) being used as a guid link, in which slot a rotationally symmetrically shaped apron tensioner ( 35 , 63 ) is guided, which is oriented axially parallel to the top rollers ( 7 , 8 , 42 , 43 , 47 ) and can be moved relative to the holding device ( 2 , 41 ) under the action of tension.
5. Top roller carrier according to claim 1 , characterized in that the plastics material is polyoxymethylene.
6. Top roller carrier according to claim 5 , characterized in that the plastics material is electrically conductive.
7. Top roller carrier according to claim 1 , characterized in that the spacing between the apron roller ( 7 , 42 ) and the feed roller ( 47 ) can be adjusted.
8. Top roller carrier according to claim 1 , characterized in that the axle receivers ( 3 , 4 , 48 , 49 ) are configured as an elastic snap-on connection.