IMAGE HEATING APPARATUS AND IMAGE FORMING APPARATUS

摘要

An image heating apparatus includes: a rotatable heating member; a belt unit including an endless belt configured to heat the rotatable heating member, and a supporting portion configured to rotatably support an inner surface of the belt; a holding portion configured to rotatably hold the belt unit; a detecting portion configured to detect that the belt is out of a predetermined zone with respect to a widthwise direction of the belt; a tilting portion configured to tilt the belt unit relative to the holding portion in a direction of causing the belt to return into the predetermined zone on the basis of an output of the detecting portion; and a limiting portion configured to limit tilting of the belt unit to an angle exceeding a predetermined angle range wider than an angle range in which the belt unit is capable of being tilted by the tilting portion.

主权项

1. An image heating apparatus comprising:
a rotatable heating member configured to heat an image on a sheet; a belt unit including an endless belt configured to heat said rotatable heating member in contact with an outer surface of said rotatable heating member, and a supporting portion configured to rotatably support an inner surface of said endless belt; a holding portion configured to rotatably hold said belt unit; a detecting portion configured to detect that said endless belt is out of a predetermined zone with respect to a widthwise direction of said endless belt; a tilting portion configured to tilt said belt unit relative to said holding portion in a direction of causing said endless belt to return into the predetermined zone on the basis of an output of said detecting portion; and a limiting portion configured to limit tilting of said belt unit to an angle exceeding a predetermined angle range wider than an angle range in which said belt unit is capable of being tilted by said tilting portion.