Patent ID: 8260187
Filing Date: 2012-09-04
Classification: G03G

Abstract:
1. An image forming device, comprising: a toner-image forming unit which forms a toner image; a transfer unit which transfers, to a transfer material, the toner image formed by the toner-image forming unit; a fixing unit which fixes, to the transfer material by a pair of fixing rollers, the toner image transferred by the transfer unit; a paper-output unit which outputs, out of the device by a pair of paper-output rollers, the transfer material to which the toner image is fixed by the fixing unit; a drive unit which drives the pair of fixing rollers or the pair of paper-output rollers; a first drive-power transmission gear, provided at the fixing unit, for transmitting from a fixing-unit side to a paper-output unit side a drive power by the drive unit, or receiving a drive power transmitted from the paper-output unit side to the fixing-unit side; a second drive-power transmission gear, engaged with the first drive-power transmission gear, for having a drive power transmitted from the first drive-power transmission gear or transmitting a drive power to the first drive-power transmission gear; a gear housing, mounted on a side wall of the paper-output unit in an axial direction of the paper-output rollers, for rotatably supporting the second drive-power transmission gear, and multiple drive-power transmission gears which transmit a drive power between the second drive-power transmission gear and the paper-output rollers; a first positioning unit which positions the fixing unit relative to a device body; and a second positioning unit which positions the paper-output unit relative to the device body, wherein: the second positioning unit positions the paper-output unit relative to the device body in the direction of a gap between the first drive-power transmission gear and the second drive-power transmission gear by engaging the gear housing with the device body, the second positioning unit positions the gear housing relative to the device body by having a positioning section provided at the device body side wall touching a positioning member provided at the gear housing, the positioning member has a protruding shape which touches a face on a fixing-unit side of a device body side wall provided between the paper-output unit and the fixing unit, the positioning member has a second protruding shape which is provided such that the second protruding shape touches a face on the paper-output unit side of the device body side wall provided between the paper-output unit and the fixing unit, or which is provided at a predetermined distance, the protruding shape and the second protruding shape are provided at the positioning member at non-opposing positions across the device body side wall provided between the paper-output unit and the fixing-unit, and a distance in a vertical direction between the protruding shape and the second protruding shape is arranged to be a minimum distance within a range such that the device body side wall provided between the paper-output unit and the fixing unit can be inserted into a gap formed between the protruding shape and the second protruding shape.