Sheet conveying device and image forming apparatus

Abstract

A sheet conveying device includes a sheet stacking part, a conveying path and a conveying roller. The conveying roller includes a drive roller and a driven roller which is pressed against the drive roller and is driven by the drive roller to be rotated. The drive roller has a rotating drive shaft and a drive roller body rotatable together with the rotating drive shaft. The driven roller has a rotating shaft and a driven roller body supported by the rotating shaft in a rotatable manner. The driven roller body has a plurality of roller parts which are arranged in an axial direction of the rotating shaft and pressed against the drive roller body.

1 . A sheet conveying device comprising:
 a sheet stacking part on which a sheet is placed;   a conveying path along which the sheet is conveyed; and   a conveying roller provided on the conveying path and configured to convey the sheet in a conveying direction along the sheet conveying path, wherein   the conveying roller includes a drive roller and a driven roller which is pressed against the drive roller and is driven by the drive roller to be rotated,   the drive roller has a rotating drive shaft and a drive roller body rotatable together with the rotating drive shaft,   the driven roller has a rotating shaft and a driven roller body supported by the rotating shaft in a rotatable manner, and   the driven roller body has a plurality of roller parts which are arranged in an axial direction of the rotating shaft and pressed against the drive roller body.   
     
     
         2 . The sheet conveying device according to  claim 1 ,
 wherein each of the plurality of roller parts is independently and rotatably supported on the rotating shaft.   
     
     
         3 . The sheet conveying device according to  claim 1 ,
 wherein the plurality of rollers are identical in shape and size,   each of the plurality of roller parts has a truncated cone shape whose outer circumference face is inclined from a larger diameter end provided at one end in the axial direction toward a smaller diameter end provided at the other end, and   the adjacent two roller parts of the plurality of roller parts are arranged in the axial direction such that the inclined directions of the outer circumference faces are different from each other.   
     
     
         4 . The sheet conveying device according to  claim 3 ,
 wherein the plurality of roller parts includes two of the roller parts adjacently arranged in the axial direction, and   the two roller parts are arranged such that the larger diameter end of one of the two roller parts faces the larger diameter end of the other of the two roller parts.   
     
     
         5 . The sheet conveying device according to  claim 3 ,
 wherein the plurality of roller parts includes two of the roller parts adjacently arranged in the axial direction, and   the two roller parts are arranged such that the smaller diameter end of one of the two roller parts faces the smaller diameter end of the other of the two roller parts.   
     
     
         6 . The sheet conveying device according to  claim 1 ,
 wherein the plurality of rollers are identical in shape and size,   each of the plurality of roller parts has a truncated cone shape whose outer circumference face is inclined from a larger diameter end provided at one end in the axial direction toward a smaller diameter end provided at the other end, and   the two adjacent roller parts of the plurality of roller parts are arranged in the axial direction such that the inclined directions of the outer circumference faces are made to be the same direction.   
     
     
         7 . The sheet conveying device according to  claim 5 ,
 wherein the plurality of roller parts includes two of the roller parts adjacently arranged in the axial direction, and   the two roller parts are arranged such that the smaller diameter end of one of the two roller parts faces the larger diameter end of the other of the two roller parts.   
     
     
         8 . The sheet conveying device according to  claim 1 ,
 wherein the driven roller body has a width in the axial direction wider than a width in the axial direction of the drive roller body.   
     
     
         9 . The sheet conveying device according to  claim 1 ,
 wherein the drive roller body and the driven roller body are disposed at a center portion in a sheet width direction perpendicular to the conveying direction.   
     
     
         10 . The sheet conveying direction according to  claim 1 , further comprising:
 a feed roller configured to feed the sheet placed on the sheet stacking part to the conveying path; and   a registration roller disposed downstream from the feed roller in the conveying direction and configured to correct a skew of the sheet,   wherein the conveying roller is disposed on the conveying path between the feed roller and the registration roller.   
     
     
         11 . The sheet conveying device according to  claim 10 ,
 wherein the feed roller has a rotating drive shaft and a feed roller body rotatable together with the rotating drive shaft,   the feed roller body is disposed at a center portion in a sheet width direction perpendicular to the conveying direction, and   the drive roller body has a width in the axial direction wider than a width in the axial direction of the feed roller body.   
     
     
         12 . An image forming apparatus comprising:
 the sheet conveying device according to  claim 1 ; and   an image forming part configured to form an image on the sheet conveyed by the sheet conveying device.