Belt device, belt control device, and image forming apparatus including same

A belt control device, comprising:

• a holder to movably support a rotation shaft of at least one of a plurality of rotators, around which a belt is looped;
• a contact part to contact an end of the belt as the belt moves in a belt width direction;
• a stationary frame part disposed facing the holder;
• a shaft moving device to move the rotation shaft as the belt moves;
• and
• at least one projection disposed on one of the stationary frame part and the holder, the at least one projection to contact the other of the stationary frame part and the holder,
• the at least one projection including a long projection having a contact portion extending in a shaft moving direction in which the rotation shaft moves, the contact portion contactable with the other of the stationary frame part and the holder,
• wherein the at least one projection further includes a short projection having a short contact portion shorter than the contact portion of the long projection in the shaft moving direction, the short contact portion contactable with the other of the stationary frame part and the holder.