Document device and image forming apparatus with offset driven roller

A document feeding device comprising:

• a document reader configured to read a document fed in a feeding direction;
• a drive roller disposed upstream of the document reader in the feeding direction;
• a plurality of driven rollers disposed opposite to the drive roller to form nips therebetween,
• a supporting member configured to be rotatably supported about a penetrating common shaft extending in a direction of a width of the document orthogonal to the feeding direction;
• and
• a biasing member configured to bias the supporting member,
• wherein the plurality of driven rollers are supported by the common shaft,
• a position of at least one nip formed by at least one of the plurality of driven rollers is offset downstream or upstream of other nips formed by other driven rollers,
• the at least one offset driven roller is rotatably supported about an axis line thereof by the supporting member and rotatably supported about the common shaft via the supporting member, and
• the biasing member biases the supporting member towards the drive roller, such that the at least one offset driven roller comes in contact with the drive roller,
• wherein the at least one offset driven roller has a diameter smaller than the other driven rollers.