An image forming apparatus includes an apparatus main body having an opening portion, an opening and closing member supported to open/close relative to the apparatus main body; a fixing unit detachably supported with respect to the apparatus main body via the opening portion, including a heating unit and a pressure roller forming a fixing nip and a pair of conveyance rotation members having a conveyance nip, including a urging portion for urging the fixing unit toward a second position from a first position. In a case where the sheet is jammed while being caught in the fixing nip and the conveyance nip, and in a case where urging force of the urging portion acts on the sheet, a tensile force acting on the sheet is less than a binding force of the fixing nip and the conveyance nip.

An image forming apparatus includes a body housing, an opening and closing unit, an image carrier, a transfer roller, a power supply line, a power supply line side contact and a transfer roller side contact. The body housing has an opening. The opening and closing unit can be opened and closed in the opening. The image carrier is provided in the body housing. The transfer roller is provided in the opening and closing unit. The power supply line includes a first contact, and a second contact. The opening and closing unit includes a contact portion which comes into contact with the second contact and moves the second contact. The contact portion makes the second contact come into contact with the first contact when the opening and closing unit is closed, and makes the second contact separate from the first contact when the opening and closing unit is opened.

An image forming apparatus includes a first door configured to pivot about a first pivot shaft in a left-right direction, an inside thereof being accessible in a state where the first door is open, and a second door configured to pivot about a second pivot shaft in the left-right direction, the inside thereof being accessible in a state where the second door is open. The first door includes a first fitting portion configured to pivot integrally with the first door. The second door includes a second fitting portion configured to pivot integrally with the second door and to be fitted into the first fitting portion. In a state where the first door is closed, the first fitting portion and the second fitting portion are fitted to each other to regulate a position of the first door relative to the second door in the left-right direction.

An image forming apparatus includes a main body including a main housing, a cover, and a fixing device installable into and removable from the main housing through an opening in the main housing. The cover is movable between a closed position and an open position to cover and uncover the opening. The main body has a first exterior surface, a second exterior surface, and a curved first corner portion connecting the exterior surfaces. The cover forms at least a part of the first exterior surface and the first corner portion. The fixing device comprises an engagement portion located at one end thereof on one side in a widthwise direction. The first corner portion overlaps the engagement portion as viewed in an installation-removable direction in a state where the fixing device is installed in the main housing and the cover is located in the closed position.

Disclosed is an image forming apparatus including: a door configured to open a conveying path between a transfer portion for forming a toner image on a recording material and a fixing portion for fixing the toner image, the door facing a surface of the recording material traveling through the conveying path; a duct provided on the door, the duct having an intake inlet and an exhaust outlet; a fan provided inside the duct, which generates the air flow travelling from the intake inlet to the exhaust outlet; and a filter provided detachably attachable to the duct, which collects particles with a predetermined particle diameter, wherein the filter has a width that is equal to or greater than an image width of a recording material with a maximum width passing through a fixing nip portion in a widthwise direction perpendicular to a conveying direction of the recording material.

An image forming apparatus includes an apparatus body including an opening portion, and an attachable/detachable unit configured to be attached to and detached from the apparatus body through the opening portion. The apparatus body includes an opening/closing member, a detection unit configured to detect a state of the attachable/detachable unit, and an interlocking mechanism configured to move the detection unit in an interlocked manner with a movement of the opening/closing member. The attachable/detachable unit includes a positioning portion. The detection unit includes a positioned portion configured to be engaged with the positioning portion. The detection unit is configured to move to a first position in which the positioned portion is engaged with the positioning portion, and to a second position retracted from the first position in the first direction such that the positioned portion is disengaged from the positioning portion.

In an image forming apparatus, an image forming unit can be replaced. An outer cover becomes in an open status when the image forming unit is replaced. An inner cover becomes in an open status with a manual operation with taking a predetermined time after the outer cover becomes in an open status when the image forming unit is replaced. A cover open/close sensor detects open and close statuses of the outer cover. The image forming unit includes a non-volatile unit memory. Further, the controller (a) performs data communication with the unit memory, and (b) if data communication with the unit memory is ongoing when the cover open/close sensor detects that the outer cover becomes in an open status, completes the data communication and cuts off power supply to the image forming unit before the predetermined time elapses.