Image Forming Device and Fixing Unit

A method for removing a fixing unit from an image forming device including

• a casing having a top wall and side walls, the side walls including a front side wall and a rear side wall opposite to each other, the top wall being positioned at a top of the casing when the casing is disposed in an orientation corresponding to an intended operation state of the image forming device;
• a process cartridge including an image bearing member that bears a toner image thereon;
• a scanning unit that exposes the image bearing member to scanned light;
• and
• a fixing unit including a fixing roller that extends in an axial direction and that fixes the toner image transferred from the image bearing member onto a recording medium, the front side wall and the rear side wall each extending in a direction substantially parallel to the axial direction, the fixing unit being disposed at a mount position closer to the rear side wall than to the front side wall,
• wherein the top wall is formed with a depressed portion depressed toward inside the casing, the depressed portion configured to be a sheet discharge tray for receiving the recording medium that has passed through the fixing unit, the sheet discharge tray including a tray member disposed at a predetermined position at the top wall,
• wherein the rear side wall is formed with an opening through which the fixing unit is removed, and
• wherein, when the tray member is disposed at the predetermined position, the tray member is positioned above and adjacent to the fixing unit and overlaps the fixing unit when viewed through the opening to prevent the fixing unit from being removed from the casing, the method comprising:
• moving the tray member from the predetermined position;
• and
• removing, after the moving step, the fixing unit from the casing through the opening.