JP2017173861A5 - - Google Patents

Claims (14)

A rotatable endless fixing belt;
A heating member for heating the fixing belt;
A nip forming member disposed inside the fixing belt;
An opposing rotating body that forms a nip portion with the fixing belt by contacting the nip forming member via the fixing belt;
A fixing device having a belt holding member that holds the fixing belt at both axial ends thereof and does not hold the fixing belt between both axial ends;
The belt holding member has a cylindrical portion disposed inside an axial end of the fixing belt;
A protective member fitted in a groove on the outer periphery of the belt holding member beyond the axial end of the fixing belt in the axial direction, and the outer periphery of the protective member when viewed from the axial direction is A fixing device, wherein the fixing device is located on the side of the counter rotator with respect to the surface of the nip forming member that abuts. The fixing device according to claim 1, wherein the flange portion protruding from the belt holding member is capable of restricting movement of the fixing belt in the axial direction when the fixing belt moves in the axial direction. The fixing device according to claim 1, wherein a gap is provided between an inner peripheral surface of the protection member and an outer peripheral surface of the groove portion of the belt holding member. The fixing device according to claim 1, wherein a tip end of the cylindrical portion of the belt holding member and an end portion of the counter rotator are separated in an axial direction. The fixing device according to claim 4, wherein the axial separation distance is 5 mm or more. The fixing device according to any one of claims 1 to 5, wherein the fixing belt is provided with an axial region that does not contact both the counter rotating body and the belt holding member. The fixing device according to claim 1, wherein the fixing belt is provided with an axial region that does not contact any of the counter rotating body, the belt holding member, and the nip forming member. The fixing device according to claim 1, wherein an end portion of the nip forming member is located on an axially central side with respect to an end portion of the pressure member. The fixing device according to claim 1, further comprising a support member that supports the nip forming member, wherein an end portion of the nip forming member is located closer to an axially central side than an end portion of the support member. . The fixing device according to claim 1, wherein the fixing belt is driven to rotate with respect to the counter rotating body. The fixing device according to claim 1, wherein an outer peripheral surface shape of the cylindrical portion is a non-circular shape. The fixing device according to claim 1, wherein the nip forming member is protruded toward the counter rotating body at a downstream end of the nip portion. The value obtained by subtracting the thickness of the protective member from the axial distance between the end surface of the flange portion projecting from the belt holding member and the end portion of the pressure member is 10 mm or more. The fixing device according to Item. An image forming apparatus comprising the fixing device according to claim 1.