Sheet conveying device capable of correcting position of conveyed sheet, image forming apparatus, and operation control method

A sheet conveying device, comprising:

• a pair of conveying members which nip and convey a sheet, the pair of conveying members being movably provided along a width direction of the sheet orthogonal to a conveying direction of the sheet;
• a detection processing portion which detects a deviation amount of the sheet conveyed by the pair of conveying members in the width direction;
• a first movement processing portion which causes the pair of conveying members that are nipping the sheet to move along the width direction based on the deviation amount detected by the detection processing portion;
• a determination processing portion which determines whether or not a predetermined movement condition is satisfied when the pair of conveying members are moved by the first movement processing portion;
• a second movement processing portion which causes, when determined by the determination processing portion that the movement condition is satisfied, the pair of conveying members that have finished conveying the sheet to move to a predetermined reference position;
• and
• an acquisition processing portion which acquires a separated distance between a position of the pair of conveying members after being moved by the first movement processing portion and the reference position,
• wherein the movement condition includes the separated distance acquired by the acquisition processing portion exceeding a predetermined threshold value.