Roller mounting assembly for textile drafting system

Abstract

A textile drafting system which is composed of a pair of coaxially mounted and rotatably driven lower rollers mounted to the frame of a textile processing unit, and a pair of upper rollers mounted adjacent the free end of a pivotally mounted weighting arm so that the upper rollers press downwardly against the lower rollers. A pair of clearer rollers are also mounted to the weighting arm so as to engage the upper rollers. The upper rollers and the clearer rollers are mounted to a common bracket which is adjustable along the length of the arm to accommodate different staple fiber lengths in the yarn which is being processed, and the upper rollers and the clearer rollers can be jointly moved with the bracket along the weighting arm without additional adjustment of the upper rollers and clearer rollers with respect to each other.

1 . A roller mounting assembly for use in a drafting system in a textile processing machine, comprising 
 an upper roller support and weighting arm which defines a longitudinal direction and is configured to be pivotally mounted to the textile processing machine for pivotal movement about an axis which is transverse to the longitudinal direction,    a mounting bracket releasably mounted to the arm so as to permit the mounting bracket to be released and moved in the longitudinal direction along the arm between selected mounting positions,    at least one upper roller and an associated clearer roller supported by the mounting bracket so that after releasing the mounting bracket it is possible to displace the upper roller and the clearer roller jointly along the arm without additional adjustment of the upper roller and clearer roller relative to each other.    
   
   
       2 . The roller mounting assembly of  claim 1 , wherein the mounting bracket comprises a pair of lateral side walls which engage respective opposite sides of the upper roller support and weighting arm from the underside thereof.  
   
   
       3 . The roller mounting assembly of  claim 1 , wherein the mounting bracket comprises an upwardly open slotted guideway which receives a coaxial mounting axle for the clearer roller, and wherein one end of the mounting axle of the clearer roller includes a retaining device comprising at least one collar which engages behind the slotted guideway.  
   
   
       4 . The roller mounting assembly of  claim 1 , wherein the upper roller support and weighting arm and the mounting bracket are constructed such that they form an electrically conductive connection between the upper roller and a frame of the textile processing machine.  
   
   
       5 . The roller mounting assembly of  claim 1 , wherein the mounting bracket comprises a base body and a steering member for receiving a coaxial mounting axle for the upper roller, with the base body comprising sheet metal and the steering member comprising an elastic material.  
   
   
       6 . The roller mounting assembly of  claim 1 , wherein the upper roller support and weighting arm comprises on its underside guide flanges and that the mounting bracket includes guide slots, with the guide flanges engaging the guide slots.  
   
   
       7 . The roller mounting assembly of  claim 2 , wherein the lateral side walls of the mounting bracket each comprise a slot formed as a guideway for guiding a mounting axle for the upper roller.  
   
   
       8 . A roller mounting assembly for use in a drafting system in a textile processing machine, comprising 
 an upper roller support and weighting arm which defines a longitudinal direction and is configured to be pivotally mounted to the textile processing machine for pivotal movement about an axis which is transverse to the longitudinal direction,    a mounting bracket releasably mounted to the arm so as to permit the mounting bracket to be released and moved in the longitudinal direction along the arm between selected mounting positions,    a pair of upper rollers coaxially mounted to a common axle which extends between the upper rollers, a pair of clearer rollers each coaxially mounted to a separate mounting axle,    said mounting bracket including a generally U-shaped base body which includes a pair of laterally spaced apart and parallel side walls, with said side walls including downwardly open and laterally aligned slots for receiving the axle of the upper rollers therein, and with said side walls further including generally upwardly open and laterally aligned slotted guideways for respectively receiving the mounting axles of the clearer rollers therein, with the clearer rollers positioned to engage respective ones of the upper rollers,    whereby after releasing the mounting bracket it is possible to displace the upper rollers and the clearer rollers jointly along the arm without additional adjustment of the upper rollers and clearer rollers relative to each other.    
   
   
       9 . The roller mounting assembly of  claim 8 , wherein the generally upwardly open slotted guideways each include a bottom ledge for limiting the movement of the axles of the clearer rollers toward the axle of the upper rollers.  
   
   
       10 . The roller mounting assembly of  claim 8  wherein the axles of the clearer rollers each include a pair of axially spaced apart flanges for engaging the respective side walls of the base body and so as to limit the axial movement of the axles of the clearer rollers in the upwardly open slots.