Fixing device including sheet member disposed between fixing belt and pressing member and image forming apparatus including the same

摘要

A fixing device includes a fixing belt, a pressuring member, a pressing member and a sheet member. The sheet member is disposed between the fixing belt and the pressing member. The sheet member includes a sliding contact part, an upstream side fixed part, a downstream side fixed part and a loose part. The sliding contact part comes into sliding contact with the inner circumference face of the fixing belt. The upstream side fixed part is fixed to the pressing member at an upstream side of the sliding contact part. The downstream side fixed part is fixed to the pressing member at a downstream side of the sliding contact part. The loose part is formed in at least one of an area between the sliding contact part and the upstream side fixed part and an area between the sliding contact part and the downstream side fixed part.

主权项

1. A fixing device comprising:
a fixing belt arranged rotatably; a pressuring member arranged rotatably and configured to come into pressure contact with the fixing belt so as to form a fixing nip; a pressing member disposed inside of the fixing belt and configured to press the fixing belt to a side of the pressuring member; and a sheet member disposed between the fixing belt and the pressing member, wherein the sheet member includes:
a sliding contact part configured to come into sliding contact with the inner circumference face of the fixing belt;an upstream side fixed part fixed to the pressing member at an upstream side of the sliding contact part in a conveying direction of a sheet;a downstream side fixed part fixed to the pressing member at a downstream side of the sliding contact part in the conveying direction of the sheet; anda loose part formed in at least one of an area between the sliding contact part and the upstream side fixed part and an area between the sliding contact part and the downstream side fixed part, wherein the pressing member includes:
a pressing body configured to press the fixing belt to the side of the pressuring member;a supporting body configured to support the pressing body; andan upstream side attachment plate disposed at an upstream side of the supporting body in the conveying direction of the sheet, wherein the upstream side fixed part is sandwiched between an upstream side face in the conveying direction of the sheet of the supporting body and a downstream side face in the conveying direction of the sheet of the upstream side attachment plate.