Patent ID: 7427060

Claim:
A sheet paper conveying device, comprising: a paper supply roller at least part of which is in contact with sheet paper and rotates to convey the sheet paper in a prescribed direction; a separation roller which clamps the sheet paper jointly with the paper supply roller, is driven to rotate in the direction reverse to the sheet paper conveying direction or rotate following the rotation of the paper supply roller, the separation roller being attached to a shaft; an auxiliary roller to clamp the sheet paper jointly with the paper supply roller and rotate freely; the auxiliary roller being provided on the shaft; a first pressing member to press the separation roller to the paper supply roller side; and a second pressing member to press the auxiliary roller to the paper supply roller side, wherein pressure provided by the second pressing member to push the auxiliary roller to the paper supply roller side becomes relatively increased while the pressure provided by the first pressing member to push the separation roller to the paper supply roller side remains constant.