JP2008015412A5 - - Google Patents

Claims (3)

現像像を担持する回転可能な像担持体と、前記像担持体を回転駆動する第１の駆動手段と、前記像担持体と対向し記録材を搬送する回転可能な記録材搬送部材と、前記記録材搬送部材を回転駆動する第２の駆動手段と、前記記録材搬送部材を前記像担持体と挟んで転写ニップ部を形成する転写部材と、互いに接触して定着ニップ部を形成する２つの回転体と、前記回転体の何れかを回転駆動する第３の駆動手段と、前記回転体の何れかを加熱する加熱体と、を有し、前記記録材搬送部材により搬送する記録材に前記転写ニップ部で前記転写部材によって現像像を転写し、前記現像像を転写した記録材を前記定着ニップ部で挟持搬送し前記加熱体の熱によって現像像を記録材に定着する画像形成装置において、
前記記録材搬送部材を前記像担持体と離隔又は接触させるように前記転写部材を移動する転写部材移動手段と、
前記第１、第２及び第３の駆動手段の駆動を制御するとともに前記転写部材移動手段の駆動を制御する駆動制御手段と、
前記加熱体を加熱する制御を行う温度制御手段と、
を有し、
前記回転体のクリーニングを行うクリーニングモード時において、前記温度制御手段は、前記加熱体の加熱を開始する制御を行い、前記駆動制御手段は、前記記録材搬送部材によりクリーニング用のシートを前記定着ニップ部に搬送するように前記第１の駆動手段と前記第２の駆動手段の駆動を制御し、前記転写部材を移動して前記記録材搬送部材を前記像担持体と離隔させるように前記転写部材移動手段の駆動を制御するとともに、前記定着ニップ部で挟持された前記シートを前記回転体により回転と停止を繰り返しながら搬送するように前記第３の駆動手段の駆動を制御することを特徴とする画像形成装置。 A rotatable image carrier for carrying a developed image; a first drive means for rotationally driving the image carrier; a rotatable recording material conveying member opposed to the image carrier for conveying a recording material; A second driving unit that rotationally drives the recording material conveying member; a transfer member that forms a transfer nip portion by sandwiching the recording material conveying member with the image carrier; and two members that contact each other to form a fixing nip portion A recording medium transported by the recording material transporting member, comprising: a rotating body; a third driving unit that rotationally drives any of the rotating bodies; In the image forming apparatus in which the developed image is transferred by the transfer member at the transfer nip portion, the recording material to which the developed image is transferred is sandwiched and conveyed by the fixing nip portion, and the developed image is fixed to the recording material by the heat of the heating body.
Transfer member moving means for moving the transfer member so as to separate or contact the recording material conveying member with the image carrier;
Drive control means for controlling the drive of the first, second and third drive means and for controlling the drive of the transfer member moving means;
Temperature control means for controlling the heating body; and
Have
In the cleaning mode in which the rotating body is cleaned, the temperature control unit performs control to start heating of the heating body, and the drive control unit causes the recording material conveying member to feed a cleaning sheet to the fixing nip. The transfer member controls the drive of the first drive means and the second drive means so as to be conveyed to a portion, and moves the transfer member to separate the recording material conveyance member from the image carrier. The driving of the third driving unit is controlled so as to control the driving of the moving unit and to convey the sheet held by the fixing nip portion while being repeatedly rotated and stopped by the rotating body. Image forming apparatus. 前記駆動制御手段は、前記２つの回転体により回転と停止を繰り返しながら前記シートを前記定着ニップ部で挟持搬送するシート送り量よりも前記記録材搬送部材により前記シートを前記定着ニップ部に搬送するシート送り量が大きくなるように前記第３の駆動手段の駆動を制御することを特徴とする請求項１に記載の画像形成装置。   The drive control means conveys the sheet to the fixing nip portion by the recording material conveying member rather than a sheet feed amount for nipping and conveying the sheet by the fixing nip portion while repeating rotation and stop by the two rotating bodies. The image forming apparatus according to claim 1, wherein the driving of the third driving unit is controlled so that the sheet feeding amount is increased. 前記記録材搬送部材の記録材搬送方向に沿って前記像担持体及び前記転写部材を並列に複数有することを特徴とする請求項１又は２に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a plurality of the image carrier and the transfer member are provided in parallel along a recording material conveyance direction of the recording material conveyance member.