Belt conveyor device and image forming apparatus

A belt conveyor device comprising:

• an endless belt;
• a plurality of rollers on which the belt is stretched turnable;
• and
• a correction mechanism for correcting meanders of the belt relative to the rollers, wherein
• the correction mechanism includes:
• a pair of inclined bearings including a pair of bearing portions for bearing a shaft portion of one of the rollers, and further including a pair of inclined portions that are inclined symmetrically with respect to an axial direction of the rollers, where the pair of inclined bearings rotatably support the shaft portion of any one of the plural rollers, and are movable in the axial direction;
• and
• a pair of main-body guides which are put into contact with the pair of inclined portions, respectively, and which make end portions of the rollers in the axial direction moved in a direction perpendicular to the axial direction, together with the pair of inclined bearings that are moved in the axial direction by meandering of the belt, where
• either one of the pair of inclined portions or the pair of main-body guides have a contact region with the other formed from a curved surface convex toward the other being in contact with the one, as viewed in a direction perpendicular to the axial direction.