IMAGE FORMING APPARATUS

To provide an image forming apparatus that can prevent the occurrence of leading end registration deviation caused by a change in the amount of offset.SOLUTION: An image forming apparatus 100 has: image forming means 10; a belt 21; a plurality of stretching rollers including an inner roller 26; an o...

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1. Verfasser: INUZUKA TOMOYA
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide an image forming apparatus that can prevent the occurrence of leading end registration deviation caused by a change in the amount of offset.SOLUTION: An image forming apparatus 100 has: image forming means 10; a belt 21; a plurality of stretching rollers including an inner roller 26; an outer roller 41; a position changing mechanism 101 that can change the relative position of the inner roller 26 to the outer roller 41 with respect to a circumferential direction of the inner roller 26 to a first relative position and a second relative position different from the first relative position; a conveying member 13 that conveys a recording material to a transfer part N2; and a conveyance driving unit 114 that drives the conveying member 13. The image forming apparatus has a control unit 150 that, for image formation on one recording material P, can execute control of changing the time from timing for the image forming means 10 to write an image to timing for the conveying member 13 to start conveying the recording material P between when performing transfer with the relative position as the first relative position and when performing transfer with the relative position as the second relative position.SELECTED DRAWING: Figure 7 【課題】オフセット量の変更に起因する先レジずれの発生を抑制することのできる画像形成装置を提供する。【解決手段】画像形成手段10と、ベルト21と、内ローラ26を含む複数の張架ローラと、外ローラ41と、内ローラ26の周方向に関する内ローラ26と外ローラ41との相対位置を、第1の相対位置と、第1の相対位置とは異なる第2の相対位置と、に変更可能な位置変更機構101と、転写部N2に記録材を搬送する搬送部材13と、搬送部材13を駆動する搬送駆動部114と、を有する画像形成装置100は、1枚の記録材Pに対する画像形成に関して、画像形成手段10の画像書き出しタイミングから、搬送部材13による記録材Pの搬送開始タイミングまでの時間を、上記相対位置を第1の相対位置として転写を行う場合と、上記相対位置を第2の相対位置として転写を行う場合と、で変更する制御を実行可能な制御部150を有する構成とする。【選択図】図7