JP2016009134A5 - - Google Patents
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- JP2016009134A5 JP2016009134A5 JP2014130716A JP2014130716A JP2016009134A5 JP 2016009134 A5 JP2016009134 A5 JP 2016009134A5 JP 2014130716 A JP2014130716 A JP 2014130716A JP 2014130716 A JP2014130716 A JP 2014130716A JP 2016009134 A5 JP2016009134 A5 JP 2016009134A5
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- image
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- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000005755 formation reaction Methods 0.000 claims description 9
- 239000003086 colorant Substances 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 2
- 230000000875 corresponding Effects 0.000 claims 2
- 238000009751 slip forming Methods 0.000 claims 2
Description
本発明の画像形成装置は、一枚ずつ搬送されるシートに、色毎に形成される単色の画像を重畳して画像形成を行う画像形成装置であって、前記色毎に配備された感光体と、前記色毎に配備され、前記感光体の表面に形成された潜像をトナーにより現像する現像手段と、前記色毎の前記感光体に当接して前記現像手段により現像されたトナー像が転写される中間転写体と、黒以外の色の前記感光体と前記中間転写体とが当接した状態または離間した状態にさせる当接離間機構と、前記形成する画像が複数色からなるカラー画像であるか、又は黒単色の画像であるかを判別する判別手段と、前記カラー画像と判別された場合には、前記複数色の感光体を前記中間転写体に当接させ、且つ、当該複数色の現像手段が動作する第一の印刷モードで画像形成を行うように制御し、前記黒単色の画像と判別された場合には、前記黒以外の色の前記現像手段の動作を停止する第二の印刷モードで画像形成を行うように制御する制御手段と、を有し、前記制御手段は、第1のシートに後続する第2のシートに形成する画像が前記黒単色の画像であり、且つ、前記第1のシートと前記第2のシートとのシート間隔が所定の間隔未満である場合には、前記第2のシートに形成すべき画像を前記第二の印刷モードで形成を行うように制御し、前記シート間隔が前記所定の間隔以上である場合には、前記黒以外の色の前記感光体を前記中間転写体から離間させるとともに前記黒以外の色の前記現像手段の動作を停止する第三の印刷モードで画像形成を行うように制御することを特徴とする。
The image forming apparatus of the present invention is an image forming apparatus that forms an image by superimposing a single-color image formed for each color on a sheet conveyed one by one, and a photoconductor provided for each color When being deployed for each of the colors, the latent images formed on the surface of the photosensitive member and developing means for developing the toner, the toner image developed by the developing unit in contact with the photosensitive member of each of the color An intermediate transfer member to be transferred, a contact / separation mechanism for bringing the photoconductor of a color other than black and the intermediate transfer member into contact with or separated from each other, and a color image in which the image to be formed is a plurality of colors Or a black monochrome image, and when the color image is determined, the plurality of color photoconductors are brought into contact with the intermediate transfer member, and the plurality The image in the first printing mode in which the color developing means operates Controlled so as to perform formation, when it is determined that the black monochrome image, control for controlling to perform image formation in the second print mode for stopping the operation of the developing unit of a color other than the black and means, possess, said control means is a second image of the image is the black monochrome forming the sheet following the first sheet, and, with the first sheet and the second sheet When the sheet interval is less than the predetermined interval, control is performed so that an image to be formed on the second sheet is formed in the second print mode, and the sheet interval is equal to or greater than the predetermined interval. In some cases, control is performed so as to form an image in a third printing mode in which the photosensitive member of a color other than black is separated from the intermediate transfer member and the operation of the developing unit of a color other than black is stopped. characterized in that it.
Claims (9)
前記色毎に配備された感光体と、
前記色毎に配備され、前記感光体の表面に形成された潜像をトナーにより現像する現像手段と、
前記色毎の前記感光体に当接して前記現像手段により現像されたトナー像が転写される中間転写体と、
黒以外の色の前記感光体と前記中間転写体とが当接した状態または離間した状態にさせる当接離間機構と、
前記形成する画像が複数色からなるカラー画像であるか、又は黒単色の画像であるかを判別する判別手段と、
前記カラー画像と判別された場合には、前記複数色の感光体を前記中間転写体に当接させ、且つ、当該複数色の現像手段が動作する第一の印刷モードで画像形成を行うように制御し、前記黒単色の画像と判別された場合には、前記黒以外の色の前記現像手段の動作を停止する第二の印刷モードで画像形成を行うように制御する制御手段と、を有し、
前記制御手段は、第1のシートに後続する第2のシートに形成する画像が前記黒単色の画像であり、且つ、前記第1のシートと前記第2のシートとのシート間隔が所定の間隔未満である場合には、前記第2のシートに形成すべき画像を前記第二の印刷モードで形成を行うように制御し、前記シート間隔が前記所定の間隔以上である場合には、前記黒以外の色の前記感光体を前記中間転写体から離間させるとともに前記黒以外の色の前記現像手段の動作を停止する第三の印刷モードで画像形成を行うように制御することを特徴とする、
画像形成装置。 An image forming apparatus for forming an image by superimposing a single color image formed for each color on a sheet conveyed one by one,
A photoreceptor arranged for each color;
Developing means arranged for each color and developing the latent image formed on the surface of the photoreceptor with toner;
An intermediate transfer member to which the toner image developed by the developing means is transferred in contact with the photosensitive member for each color ;
A contact / separation mechanism for bringing the photoconductor of a color other than black and the intermediate transfer body into contact with or separated from each other;
A discriminating means for discriminating whether the image to be formed is a color image composed of a plurality of colors or a black monochromatic image;
When it is determined that the image is a color image, the plurality of color photosensitive members are brought into contact with the intermediate transfer member, and image formation is performed in a first printing mode in which the plurality of color developing units operate. controlling, when it is determined that the black monochrome image, have a, and control means for controlling to perform image formation in the second print mode for stopping the operation of the developing unit of a color other than the black And
In the control unit, an image formed on a second sheet subsequent to the first sheet is the monochrome image, and a sheet interval between the first sheet and the second sheet is a predetermined interval. If the sheet interval is less than the predetermined interval, control is performed so that the image to be formed on the second sheet is formed in the second print mode. The photosensitive member of a color other than that is separated from the intermediate transfer member and controlled to perform image formation in a third print mode in which the operation of the developing unit of a color other than black is stopped .
Image forming apparatus.
前記制御手段は、前記後続するシートに形成する画像が前記黒単色の画像であり、且つ、前記計数手段で数えられた回数が所定値未満である場合には、前記第二の印刷モードで画像形成を行うように制御し、当該所定値を超えている場合には、前記第三の印刷モードで画像形成を行うように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。 And further has a counting means for counting the number of times that a black monochrome image is continuously formed,
When the image formed on the subsequent sheet is the black monochrome image and the number of times counted by the counting unit is less than a predetermined value, the control unit performs the image in the second printing mode. Control to perform the formation, and if the predetermined value is exceeded, control to perform the image formation in the third print mode,
The image forming apparatus according to claim 1 .
請求項2に記載の画像形成装置。 The control means performs the operation of the developing means when the image formed on the succeeding sheet is the black monochrome image and the number counted by the counting means exceeds the predetermined value. The image forming device is controlled to perform image formation in a fourth printing mode in which the photoconductors of colors other than black are separated from the intermediate transfer member while maintaining
The image forming apparatus according to claim 2 .
前記過昇温が検知された場合に、前記過昇温が検知されていない場合に比べて次シートの給送開始を遅らせることにより前記シート間隔を調整する調整手段と、をさらに有することを特徴とする、
請求項1又は3に記載の画像形成装置。 Temperature detecting means for detecting an excessive temperature rise in a fixing unit for fixing the toner image transferred to the sheet;
And an adjustment unit that adjusts the sheet interval by delaying the start of feeding of the next sheet when the excessive temperature rise is detected compared to when the excessive temperature rise is not detected. And
The image forming apparatus according to claim 1 or 3.
請求項4に記載の画像形成装置。 When the image formed on the succeeding sheet is the black monochrome image and the sheet interval after adjustment by the adjustment unit is equal to or greater than a predetermined interval, the control unit performs the third printing mode. Control to perform image formation with
The image forming apparatus according to claim 4 .
請求項1乃至5いずれか一項に記載の画像形成装置。 The control unit performs control so that an operation of separating the photosensitive member of the color other than black from the intermediate transfer member is started after the operation of the developing unit of all colors other than black is stopped. Features
The image forming apparatus according to any one of claims 1 to 5.
前記複数の画像形成部の感光体に現像されたトナー像が転写される中間転写体と、An intermediate transfer member onto which the developed toner images are transferred to the photosensitive members of the plurality of image forming units;
前記中間転写体が前記複数の画像形成部の内の所定の色成分に対応する画像形成部の感光体のみに当接している第1状態と、前記複数の画像形成部のすべての感光体と当接している第2状態とを切り替える切替機構と、A first state in which the intermediate transfer member is in contact with only the photosensitive member of the image forming unit corresponding to a predetermined color component in the plurality of image forming units; and all the photosensitive members of the plurality of image forming units; A switching mechanism for switching between the contacted second state;
前記画像形成手段により形成される画像がカラー画像であるかモノクロ画像である有るかを判別する判別手段と、Determining means for determining whether the image formed by the image forming means is a color image or a monochrome image;
前記切替機構により前記第2状態に切り替えられている状態で、前記判別手段により次に形成される画像がモノクロ画像であると判別された場合であって、搬送される複数のシートの搬送間隔が前記切替機構による前記第2状態から前記第1状態に切り替えに要する時間よりも長い場合、前記切替機構により第2状態から前記第1状態に切り替えて前記モノクロ画像の形成を行い、搬送される複数のシートの搬送間隔が前記切替機構による前記第2状態から前記第1状態に切り替えに要する時間よりも短い場合、前記第2状態のまま前記モノクロ画像の形成を行うよう前記画像形成手段を制御する制御手段と、を有することを特徴とする、When the switching mechanism determines that the image to be formed next is a monochrome image while being switched to the second state, the transport interval of the transported sheets is When it is longer than the time required for switching from the second state to the first state by the switching mechanism, the switching mechanism switches from the second state to the first state to form the monochrome image, and a plurality of conveyed images When the sheet conveyance interval is shorter than the time required for switching from the second state to the first state by the switching mechanism, the image forming unit is controlled to form the monochrome image in the second state. And a control means.
画像形成装置。Image forming apparatus.
前記第2状態のまま前記モノクロ画像の形成を行う場合であって、前記カウント手段のカウント値が所定値以下の場合、前記制御手段は、前記所定の色成分以外の画像形成部の現像手段への電圧印加を停止するよう前記画像形成手段を制御することを特徴とする、In the case where the monochrome image is formed in the second state and the count value of the counting unit is equal to or smaller than a predetermined value, the control unit transfers to the developing unit of the image forming unit other than the predetermined color component. Controlling the image forming unit to stop the voltage application of
請求項7記載の画像形成装置。The image forming apparatus according to claim 7.
請求項8記載の画像形成装置。The image forming apparatus according to claim 8.
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JP2014130716A JP2016009134A (en) | 2014-06-25 | 2014-06-25 | Image forming apparatus |
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JP2014130716A JP2016009134A (en) | 2014-06-25 | 2014-06-25 | Image forming apparatus |
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JP2016009134A5 true JP2016009134A5 (en) | 2017-08-03 |
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JP6938850B2 (en) * | 2016-04-19 | 2021-09-22 | コニカミノルタ株式会社 | Image forming device |
JP6668958B2 (en) * | 2016-06-07 | 2020-03-18 | コニカミノルタ株式会社 | Image forming device |
JP6788384B2 (en) * | 2016-06-07 | 2020-11-25 | キヤノン株式会社 | Image forming device |
JP2021121844A (en) * | 2020-01-31 | 2021-08-26 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus and image forming method |
JP7540260B2 (en) | 2020-09-23 | 2024-08-27 | ブラザー工業株式会社 | Image forming device |
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US7787809B2 (en) * | 2007-09-10 | 2010-08-31 | Kabushiki Kaisha Toshiba | Image forming apparatus, transfer unit thereof, and method of shifting transfer rollers thereof |
JP2010002665A (en) * | 2008-06-20 | 2010-01-07 | Konica Minolta Business Technologies Inc | Image forming apparatus |
JP5759173B2 (en) * | 2010-12-28 | 2015-08-05 | キヤノン株式会社 | Image forming apparatus |
JP5721492B2 (en) * | 2011-03-24 | 2015-05-20 | キヤノン株式会社 | Image forming apparatus |
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