Fixing device and image forming apparatus

摘要

A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member, a heating stop device, shape restricting members and biasing members. The fixing belt is provided to be rotatable around a rotation axis. The pressing member is provided to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip. The heat source heats the fixing belt. The pressing member presses the fixing belt to a side of the pressuring member. The heating stop device faces an outer circumferential face of the fixing belt and to operate at an operating temperature so as to stop the heat source from heating the fixing belt. The shape restricting members are attached to both end parts of the fixing belt and restricts a shape of the fixing belt.

主权项

1. A fixing device comprising:
a fixing belt configured to be rotatable around a rotation axis; a pressuring member configured to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip; a heat source configured to heat the fixing belt; a pressing member configured to press the fixing belt to a side of the pressuring member; a heating stop device configured to face an outer circumferential face of the fixing belt and to operate at an operating temperature so as to stop the heat source from heating the fixing belt; shape restricting members attached to both end parts of the fixing belt and configured to restrict a shape of the fixing belt; and biasing members configured to bias the shape restricting members toward an inside in a direction of the rotation axis, wherein, when the fixing belt is broken in a circumferential direction, the shape restricting members move toward the inside in the direction of the rotation axis by biasing force of the biasing members and the shape restricting members press the fixing belt toward the inside in the direction of the rotation axis so that at least a part of the fixing belt is deformed to a close side to the heating stop device.