Fixing apparatus and image forming apparatus

摘要

A fixing apparatus includes: a fixing belt; a pressurizing roller; a supporting member; a heating unit; a nip forming member; and a deform preventing unit. The fixing apparatus and an image forming apparatus including the fixing apparatus prevent a supporting member from deforming due to sliding of a fixing member, improving energy conservation and durability of parts and obtaining a good image.

主权项

1. A fixing apparatus, comprising:
a fixing member for a rotatable endless belt; a pressurizing member arranged to be abuttable against the fixing member on an outer peripheral side of the fixing member; a supporting member that is a C type pipe member and includes a concave portion with an opening thereof arranged to be a bottom face side, the C type pipe member being fixedly provided inside the fixing member and an outer peripheral face of the C type pipe member being in slidable contact with an inner peripheral face of the fixing member; a heating unit that heats the supporting member; a nip forming member that is contained in the concave portion of the supporting member on an inner peripheral side of the fixing member and abuts against the pressurizing member via the fixing member to form a nip portion; and a deform preventing unit which reinforces the concave portion to prevent deforming of the supporting member due to sliding of the fixing member, wherein the deform preventing unit includes an internal holding member which has an L-shaped angle shape or a groove shape with a cross section that is U-shaped and includes sleeve portions having different lengths, the internal holding member being installed from an outer peripheral side of the supporting member to inside the concave portion.