Drafting arrangement for a knitting machine

Abstract

A drafting arrangement for a knitting machine for the production of a fiber structure includes a roving with double aprons guided over apron rollers and an output roller pair. The apron rollers and the output roller pair respectively have a press roller and an electric motor-driven drive roller and the rollers and the electric motors are arranged on the front side of a base plate. Motor shafts are passed through the base plate and are connected by means of drive devices to the shaft members of the drive rollers. A clamping device is provided on the rear side (18) of the base plate (11) to press apron rollers and the output roller pair against the drive rollers.

1 . A drafting arrangement for a knitting machine for the production of a fiber structure, comprising:
 a roving with double aprons guided over apron rollers; and   an output roller pair;   wherein the apron rollers and the output roller pair respectively have a press roller and an electric motor-driven drive roller;   wherein the press rollers, the electric motor-driven drive rollers and electric motors are arranged on a front side of a base plate, whereas motor shafts are passed through the base plate and are connected by means-of-drive devices to shaft members of the electric motor-driven drive rollers mounted in the base plate; and   wherein a clamping device is provided on a the-rear side of the base plate to press the  press rollers of the apron roller pair and the output roller pair against the electric motor-driven drive rollers.   
     
     
         2 . The drafting arrangement according to  claim 1 , wherein the shaft members of the press rollers are guided through openings in the base plate ( 11 ) with play and are movable up and down in the openings by the clamping device. 
     
     
         3 . The drafting arrangement according to  claim 1 , wherein the shaft members of the press rollers are rotatably mounted in slides on a rear side of the base plate, and wherein a spring force is applied to the slides by the clamping device. 
     
     
         4 . The drafting arrangement according to  claim 3 , wherein each slide has an associated spring. 
     
     
         5 . The drafting arrangement according to  claim 3 , wherein the clamping device has a rail, which extends over the slides and is displaceably arranged on the base plate and with which the contact pressure is generated. 
     
     
         6 . The drafting arrangement according to  claim 5 , wherein the rail is arranged to be longitudinally displaceable on the base plate and is provided with cams, and wherein the cams act on springs interacting with the slides. 
     
     
         7 . The drafting arrangement according to  claim 6 , wherein the springs are leg springs. 
     
     
         8 . The drafting arrangement according to  claim 6 , wherein the springs are arranged in an adjustable spring block. 
     
     
         9 . The drafting arrangement according to  claim 1 , wherein the clamping device is activated by a manually operable clamping lever. 
     
     
         10 . The drafting arrangement according to  claim 1  wherein, an input roller pair-includes a further press roller that also is acted on by the clamping device, and wherein the further press roller, is additionally arranged on the base plate. 
     
     
         11 . The drafting arrangement according to  claim 1 , wherein the motors are protected from fiber fly by a removable covering. 
     
     
         12 . The drafting Drafting-arrangement according to  claim 1 , wherein a suction means is arranged on the output roller pair. 
     
     
         13 . The drafting arrangement according to  claim 1 , wherein the rear side of the base plate is protected from fiber fly by removable housing cover. 
     
     
         14 . A knitting machine with at least one drafting arrangement according to  claim 1 .