Patent ID: 8639175

Claim:
A curl correcting device in which a soft roller and a hard roller having different degrees of hardness make a nip in such a manner the soft roller is in press-contact with the hard roller with the soft roller being depressed, the curl correcting device correcting curl on a paper sheet by causing the paper sheet to pass through the nip, the curl correcting device comprising: an inter-shaft distance adjusting unit that is equipped with a main body, and prolongs/shortens a distance between shafts of the soft roller and the hard roller; and a casing that is arranged close to the inter-shaft distance adjusting unit and is attached to the main body in a detachable manner, the casing includes the soft roller, the hard roller, and a support member, in which the support member supports one roller of the soft roller and the hard roller and is movable in an upwardly or a downwardly direction with the movement of the inter-shaft distance adjusting unit, and a link mechanism being engaged with the support member, wherein: the casing can be attached to the main body in both a normal orientation and an inverse orientation in which positions of the soft roller and the hard roller with respect to a paper-sheet conveyance path is inverse relative to those in the normal orientation, when the casing is attached in such a manner that the one roller is positioned close to the inter-shaft distance adjusting unit, the support member is moved by pushing a part of the support member via the inter-shaft distance adjusting unit so that the one roller comes into press-contact with the other roller, wherein the part of the support member is outside of the casing, when the casing is attached in such a manner that the other roller is positioned close to the inter-shaft distance adjusting unit, the support member is moved via the link mechanism by pushing the link mechanism from the outside of the casing via the inter-shaft distance adjusting unit so that the one roller comes into press-contact with the other roller, and a direction where the inter-shaft distance adjusting unit pushes the support member is the same as a direction where the inter-shaft distance adjusting unit pushes the link mechanism.