Sheet feeding device and image forming apparatus

Abstract

A sheet feeding device having a conveyance roller to convey a sheet and a cleaning member in slide contact with the outer circumferential surface of the conveyance roller for removing foreign matter adhering to the conveyance roller, wherein the cleaning member is formed by a conductive brush, and an image forming apparatus having the sheet feeding device thereof.

1 . A sheet feeding device, comprising: 
 a conveyance roller to convey a sheet; and    a cleaning member in slide contact with an outer circumferential surface of the conveyance roller to remove foreign matter adhering to the conveyance roller;    wherein the cleaning member is formed with a conductive brush.    
   
   
       2 . The sheet feeding device of  claim 1 , wherein the outer circumferential surface of the conveyance roller is formed with urethane rubber.  
   
   
       3 . The sheet feeding device of  claim 1 , wherein the outer circumferential surface of the conveyance roller is formed with urethane rubber having a hardness of 40° to 60°.  
   
   
       4 . The sheet feeding device of  claim 1 , wherein the outer circumferential surface of the conveyance roller has a plurality of projections forming asperity.  
   
   
       5 . The sheet feeding device of  claim 1 , wherein a thickness of bristles of the conductive brush is from 5 to 10 denier.  
   
   
       6 . The sheet feeding device of  claim 1 , wherein an amount of overlapping between an end of a bristle of the conductive brush and the outer circumferential surface of the conveyance roller at a position in which the conductive brush and the conveyance roller press each other is from 0.5 mm to 1.5 mm.  
   
   
       7 . The sheet feeding device of  claim 1 , wherein the cleaning member is a rotation brush, which is rotated by a driving source.  
   
   
       8 . An image forming apparatus, comprising: 
 the sheet feeding device of  claim 1;  and    an image forming section to form an image on a sheet conveyed from the sheet feeding device.