Sheet conveyance apparatus and image forming apparatus

A sheet conveyance apparatus comprising:

• a driving roller configured to rotate by receiving a driving force;
• a steering portion configured to change an inclination angle of a rotational axis of the driving roller with respect to a sheet width direction orthogonal to a sheet conveyance direction;
• a follower roller configured to nip and convey a sheet together with the driving roller and pivot about a pivot axis intersecting with both the sheet conveyance direction and the sheet width direction by following change in the inclination angle of the driving roller;
• a contact/separation mechanism configured to switch the driving roller and the follower roller between a contact state in which the driving roller and the follower roller are in contact with each other and a separation state in which the driving roller and the follower roller are separated from each other;
• a first detection portion configured to detect vibration of the follower roller in a pivot direction about the pivot axis;
• a second detection portion configured to detect positional deviation of the sheet;
• and
• a control portion configured to execute a correction operation of correcting the positional deviation of the sheet on a basis of a detection result of the second detection portion and to execute a predetermined process on a basis of a detection result of the first detection portion, the predetermined process being a process for causing the correction operation to be started after the driving roller and the follower roller have been switched from the separation state to the contact state and after the vibration of the follower roller has settled down within a predetermined range.