JP4586579B2

JP4586579B2 - Color image forming apparatus

Info

Publication number: JP4586579B2
Application number: JP2005060310A
Authority: JP
Inventors: 毅鈴木; 裕司奥川
Original assignee: Konica Minolta Business Technologies Inc
Current assignee: Konica Minolta Business Technologies Inc
Priority date: 2005-03-04
Filing date: 2005-03-04
Publication date: 2010-11-24
Anticipated expiration: 2025-03-04
Also published as: JP2006243460A

Description

本発明は、カラー画像形成装置に関し、特に、イエロー画像形成部、マゼンタ画像形成部、シアン画像形成部及び黒画像形成部を有するカラー画像形成装置に関する。 The present invention relates to a color image forming apparatus, and more particularly to a color image forming apparatus having a yellow image forming unit, a magenta image forming unit, a cyan image forming unit, and a black image forming unit.

電子写真方式のカラー画像形成装置において、感光体や中間転写体を１回循環させる工程中に多色像、即ち、カラートナー像を形成することができるものには非特許文献１に記載されているように３種類のタイプがある。 Non-patent document 1 describes an electrophotographic color image forming apparatus capable of forming a multicolor image, that is, a color toner image, during the process of circulating the photosensitive member and the intermediate transfer member once. As you can see, there are three types.

その第１は、イエロー画像形成部、マゼンタ画像形成部、シアン画像形成部及び黒画像形成部が中間転写体に対向して配置され、各画像形成部において形成された単色トナー像が中間転写体に転写され、中間転写体上で重なってカラートナー像が形成され、中間転写体から記録材にカラートナーが転写され、記録材上にカラートナー像が形成されるものである。 The first is that a yellow image forming unit, a magenta image forming unit, a cyan image forming unit, and a black image forming unit are arranged to face the intermediate transfer member, and a single color toner image formed in each image forming unit is an intermediate transfer member. And a color toner image is formed on the intermediate transfer member by overlapping, and the color toner is transferred from the intermediate transfer member to the recording material to form a color toner image on the recording material.

その第２は、イエロー画像形成部、マゼンタ画像形成部、シアン画像形成部及び黒画像形成部が感光体に対して対向配置され、各画像形成部により、感光体上に単色トナー像が形成され、感光体上に単色トナー像が重なったカラートナー像が形成され、感光体上のカラートナー像が記録材に転写されて、記録材上にカラートナー像が形成されるものである。 Second, a yellow image forming unit, a magenta image forming unit, a cyan image forming unit, and a black image forming unit are arranged to face the photoconductor, and a monochromatic toner image is formed on the photoconductor by each image forming unit. A color toner image is formed by superimposing monochromatic toner images on the photoconductor, and the color toner image on the photoconductor is transferred to a recording material, thereby forming a color toner image on the recording material.

その第３は、イエロー画像形成部、マゼンタ画像形成部、シアン画像形成部及び黒画像形成部が記録材を搬送する搬送体に対向して配置され、各画像形成部において形成された単色トナー像が搬送体により搬送された記録材に転写され、記録材上で重なって記録材上にカラートナー像が形成されるものである。
株式会社コロナ社発行、続電子写真技術の基礎と応用（１９９６年１１月１５日初版発行） Thirdly, the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit are arranged to face the conveyance body that conveys the recording material, and the monochromatic toner image formed in each image forming unit. Are transferred onto the recording material conveyed by the conveying member, and overlapped on the recording material to form a color toner image on the recording material.
Issued by Corona Co., Ltd. Continued Basics and applications of electrophotographic technology (issued first edition on November 15, 1996)

カラー画像形成装置においては、各画像形成部を位置精度良く設置することが、色ずれのない高画質のカラートナー像を形成するために重要であり、特に、画像の位置を決定する露光装置の設置位置が高画質の画像を形成する上で重要になる。従来技術の画像形成装置における各走査露光装置の位置調整について説明する。 In a color image forming apparatus, it is important to install each image forming unit with high positional accuracy in order to form a high-quality color toner image without color misregistration. In particular, in an exposure apparatus that determines the position of an image. The installation position is important in forming a high-quality image. The position adjustment of each scanning exposure apparatus in the conventional image forming apparatus will be described.

図１は走査露光装置の位置調整の概念図である。Ｙ、Ｍ、Ｃ、Ｋはそれぞれイエロー画像の露光におけるイエロー走査線、マゼンタ画像の露光におけるマゼンタ走査線、シアン画像の露光におけるシアン走査線、黒画像の走査における黒走査線を示す。また、Ｒは基準走査線を示す。 FIG. 1 is a conceptual diagram of position adjustment of a scanning exposure apparatus. Y, M, C, and K respectively indicate a yellow scanning line for yellow image exposure, a magenta scanning line for magenta image exposure, a cyan scanning line for cyan image exposure, and a black scanning line for black image scanning. R represents a reference scanning line.

各走査露光装置は、粗組み立てにおいて、設計精度の範囲内で位置調整されて組み立てられるが、図１のように各走査線の両端は揃わない。このような不一致は、画像データを発生する画像データ生成部の有効画像幅を調整する電気的調整により補正し、揃えることができる。即ち、矢印で示すように、主走査方向に走査線をシフトさせることにより、主走査方向の位置を一致させることができる。しかしながら、電気的調整により各走査線を揃えることによっても、各走査における書込位置は完全には一致しない。 Each scanning exposure apparatus is assembled with its position adjusted within the range of design accuracy in rough assembly, but the ends of each scanning line are not aligned as shown in FIG. Such inconsistencies can be corrected and made uniform by electrical adjustment for adjusting the effective image width of the image data generation unit that generates the image data. That is, as indicated by the arrows, the positions in the main scanning direction can be matched by shifting the scanning lines in the main scanning direction. However, even if the scanning lines are aligned by electrical adjustment, the writing position in each scanning does not completely match.

走査線は連続するドットにより形成されるが、前記電気的調整により走査線の両端が一致した場合でも、ドット間隔が各走査線間で異なるという書込位置のずれが除去しきれない。 Although the scanning lines are formed by continuous dots, even when both ends of the scanning lines coincide with each other by the electrical adjustment, it is not possible to completely eliminate the writing position shift in which the dot intervals are different among the scanning lines.

このような書込位置のずれは、図１の走査線Ｙ、Ｍ、Ｃ、Ｋが基準線Ｒから大きくずれたために、調整量が大きい場合に特に顕著になり、色ずれや画像の歪みの原因となる。 Such a writing position shift is particularly noticeable when the adjustment amount is large because the scanning lines Y, M, C, and K in FIG. Cause.

このために、各画像形成部の走査露光装置の位置を調整し、図１の走査線Ｙ、Ｍ、Ｃ、Ｋ間の位置のずれを無くするか又は許容範囲内に収める機械的な調整が従来から行われ、機械的な位置調整を行った後に、さらに画像データ生成部の電気的調整が行われていた。 For this purpose, the position of the scanning exposure device of each image forming unit is adjusted, and the mechanical adjustment to eliminate the positional deviation between the scanning lines Y, M, C, and K in FIG. Conventionally, after mechanical position adjustment, electrical adjustment of the image data generation unit has been further performed.

機械的な位置調整の従来方法では、４個の走査露光装置のうちの特定の走査露光装置、たとえば、黒走査露光装置を基準とし、黒走査露光装置にイエロー走査露光装置、マゼンタ走査露光装置及びシアン走査露光装置の位置を合わせる調整が行われる。このような調整は黒画像形成部による書込を行った後に各有彩色画像形成部により画像形成を行い、各有彩色走査露光装置の位置を調整して、走査線Ｋに走査線Ｙ、Ｍ、Ｃを一致させることにより行われる。 In the conventional method of mechanical position adjustment, a specific scanning exposure apparatus of four scanning exposure apparatuses, for example, a black scanning exposure apparatus is used as a reference, and the black scanning exposure apparatus includes a yellow scanning exposure apparatus, a magenta scanning exposure apparatus, and Adjustment for adjusting the position of the cyan scanning exposure apparatus is performed. In such adjustment, after writing by the black image forming unit, image formation is performed by each chromatic color image forming unit, the position of each chromatic color scanning exposure apparatus is adjusted, and the scanning lines Y, M , C are matched.

しかるに、各走査露光装置は基準線Ｒを中心とした許容範囲の幅内に、走査線Ｙ、Ｍ、Ｃ，Ｋが収まるように組み立てられるが、黒走査露光装置のように、特定ものを基準として位置調整が行われる場合、該特定の走査露光装置が基準位置から大きくずれているときは、該特定の走査露光装置に他の走査露光装置を合わせるために、調整量が大きくなって調整代の範囲を超えてしまい調整ができない場合が生ずる。 However, each scanning exposure apparatus is assembled so that the scanning lines Y, M, C, and K are within the allowable range with the reference line R as the center, but a specific one such as a black scanning exposure apparatus is used as a reference. If the specific scanning exposure apparatus is greatly deviated from the reference position, the adjustment amount becomes large to adjust the other scanning exposure apparatus to the specific scanning exposure apparatus. There are cases where adjustment cannot be made because the value exceeds the range.

このように従来の調整方法では、調整作業に手間がかかるとともに、調整が出来ない場合があった。 As described above, in the conventional adjustment method, adjustment work takes time and adjustment may not be possible.

本発明はこのような問題を解決し、簡単な調整で、各走査露光装置を高精度で位置調整し、設定することが可能であり、色ずれが十分に低減され、高画質の画像を形成することが出来るカラー画像形成装置を提供することを目的とする。 The present invention solves such a problem, and it is possible to position and set each scanning exposure apparatus with high accuracy by simple adjustment, and color misregistration is sufficiently reduced to form a high-quality image. An object of the present invention is to provide a color image forming apparatus capable of performing the above.

前記目的は下記の発明により達成される。
１．イエロー画像形成部、
マゼンタ画像形成部、
シアン画像形成部、
黒画像形成部、
中間転写体、及び
二次転写装置を備え、
前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部のそれぞれは、感光体、該感光体を帯電する帯電装置、帯電された前記感光体を走査露光して静電潜像を形成する走査露光装置、前記感光体上の静電潜像を現像してトナー像を形成する現像装置、一次転写装置、及びクリーニング装置を有し、
前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部が前記中間転写体に対して対向して配置され、前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部において形成されたトナー像を前記一次転写装置により前記中間転写体に転写し、前記中間転写体上で重ねることにより、前記中間転写体上にカラートナー像を形成し、形成されたカラートナー像を前記二次転写装置により記録材に転写するカラー画像形成装置において、
主走査方向の一方の端部において前記走査露光装置を支持する第１支持手段、及び前記主走査方向の他方の端部において、前記走査露光装置を支持する第２支持手段を有し、
前記第１、第２支持手段の少なくとも一つは、前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部の複数の前記走査露光装置を共通に支持する支持部材を有し、該支持部材の調整により、複数の前記走査露光装置が共通に位置調整されるとともに、
前記第１、第２支持手段の少なくとも一つは、前記イエロー画像形成部、前記マゼンタ前記画像形成部、及び前記シアン画像形成部の複数の前記走査露光装置を個々に調整可能に支持する調整支持部材を有し、該調整支持部材の調整により、前記イエロー画像形成部の前記走査露光装置、前記マゼンタ画像形成部の前記走査露光装置、及び前記シアン画像形成部の前記走査露光装置は、黒画像形成部の前記走査露光装置に対して位置調整され、設定されることにより、複数の前記走査露光装置の走査線を一致させる調整が行われていることを特徴とするカラー画像形成装置。
２．感光体、イエロー画像形成部、マゼンタ画像形成部、シアン画像成部、黒画像形成部、及び転写装置を備え、前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部はそれぞれ走査露光装置、及び現像装置を有し、
前記感光体に対向して、前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像成部、前記黒画像形成部、及び前記転写装置が配置されるとともに、
前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像成部、及び前記黒画像形成部により、前記感光体上にトナー像を形成し、前記感光体上で重ねることにより、前記感光体上にカラートナー像を形成し、形成したカラートナー像を前記転写装置により記録材体に転写するカラー画像形成装置において、
主走査方向の一方の端部において前記走査露光装置を支持する第１支持手段、及び前記主走査方向の他方の端部において、前記走査露光装置を支持する第２支持手段を有し、
前記第１、第２支持手段の少なくとも一つは、複数の前記走査露光装置を共通に支持する支持部材を有し、該支持部材の調整により、複数の前記走査露光装置が共通に位置調整されるとともに、
前記第１、第２支持手段の少なくとも一つは、前記イエロー画像形成部、前記マゼンタ画像形成部、及び前記シアン画像形成部の複数の前記走査露光装置を個々に調整可能に支持する調整支持部材を有し、該調整支持部材の調整により、前記イエロー画像形成部の前記走査露光装置、前記マゼンタ画像形成部の前記走査露光装置、及び前記シアン画像形成部の前記走査露光装置は、黒画像形成部の前記走査露光装置に対して位置調整され、設定されることにより、複数の前記走査露光装置の走査線を一致させる調整が行われていることを特徴とするカラー画像形成装置。
３．イエロー画像形成部、
マゼンタ画像形成部、
シアン画像形成部、
黒画像形成部、及び
記録材を搬送する搬送体を備え、
前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部はそれぞれ、感光体、該感光体を帯電する帯電装置、帯電された前記感光体を走査露光して静電潜像を形成する走査露光装置、前記感光体上の静電潜像を現像してトナー像を形成する現像装置、一次転写装置、及びクリーニング装置を有し、
前記イエロー画像形成部、前記マゼンタ画像形成部、前記シアン画像形成部、及び前記黒画像形成部において形成されたトナー像を前記一次転写装置により、前記搬送体により搬送された記録材に転写し、記録材上で重ねることにより、記録材上にカラートナー像を形成するカラー画像形成装置において、
主走査方向の一方の端部において前記走査露光装置を支持する第１支持手段、及び前記主走査方向の他方の端部において、前記走査露光装置を支持する第２支持手段を有し、
前記第１、第２支持手段の少なくとも一つは、複数の前記走査露光装置を共通に支持する支持部材を有し、該支持部材の調整により、複数の前記走査露光装置が共通に位置調整されるとともに、
前記第１、第２支持手段の少なくとも一つは、前記イエロー画像形成部、前記マゼンタ前記画像形成部、及び前記シアン画像形成部の複数の前記走査露光装置を個々に調整可能に支持する調整支持部材を有し、該調整支持部材の調整により、前記イエロー画像形成部の前記走査露光装置、前記マゼンタ画像形成部の前記走査露光装置、及び前記シアン画像形成部の前記走査露光装置は、黒画像形成部の前記走査露光装置に対して位置調整され、設定されることにより、複数の前記走査露光装置の走査線を一致させる調整が行われていることを特徴とするカラー画像形成装置。
４．前記走査露光装置が、前記第１支持手段を中心として回転することにより、複数の前記走査露光装置が共通に位置調整されていることを特徴とする前記１〜３のいずれか１項に記載のカラー画像形成装置。 The object is achieved by the following invention.
1. Yellow image forming section,
Magenta image forming section,
Cyan image forming section,
Black image forming section,
Intermediate transfer member, and
With a secondary transfer device,
Each of the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit scans and exposes a photosensitive member, a charging device that charges the photosensitive member, and the charged photosensitive member. scanning exposure apparatus for forming an electrostatic latent image, developing the electrostatic latent image on the photosensitive member developing device for forming a toner image, have a primary transfer device, and a cleaning device Te,
The yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit are disposed to face the intermediate transfer member, and the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and transferring the toner image formed in the black image forming unit on the intermediate transfer member by the primary transfer device, by superimposing on the intermediate transfer body, the color toner on the intermediate transfer body In a color image forming apparatus that forms an image and transfers the formed color toner image to a recording material by the secondary transfer device.
A first support means for supporting the scanning exposure apparatus at one end in the main scanning direction , and a second support means for supporting the scanning exposure apparatus at the other end in the main scanning direction;
At least one of the first and second support means supports a plurality of the scanning exposure devices of the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit in common. a support member, the adjustment of the support member, Rutotomoni plurality of the scanning exposure apparatus is adjusted common position,
At least one of the first and second support means is an adjustment support that supports the plurality of scanning exposure devices of the yellow image forming unit, the magenta image forming unit, and the cyan image forming unit in an individually adjustable manner. By adjusting the adjustment support member, the scanning exposure device of the yellow image forming unit, the scanning exposure device of the magenta image forming unit, and the scanning exposure device of the cyan image forming unit A color image forming apparatus , wherein a position is adjusted and set with respect to the scanning exposure apparatus of a forming unit, thereby adjusting the scanning lines of the plurality of scanning exposure apparatuses to coincide with each other .
2. A photoconductor, a yellow image forming unit, a magenta image forming unit, a cyan image forming unit, a black image forming unit, and a transfer device; and the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit. Each image forming unit has a scanning exposure device and a developing device,
The yellow image forming unit, the magenta image forming unit, the cyan image forming unit, the black image forming unit, and the transfer device are arranged facing the photoconductor,
A toner image is formed on the photoconductor by the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit, and is superposed on the photoconductor. In a color image forming apparatus, a color toner image is formed on the recording material, and the formed color toner image is transferred to a recording material by the transfer device .
A first support means for supporting the scanning exposure apparatus at one end in the main scanning direction , and a second support means for supporting the scanning exposure apparatus at the other end in the main scanning direction;
At least one of the first and second support means includes a support member that supports a plurality of the scanning exposure apparatuses in common, and the positions of the plurality of scanning exposure apparatuses are adjusted in common by adjusting the support members. And
At least one of the first and second support means is an adjustment support member that supports the plurality of scanning exposure apparatuses of the yellow image forming unit, the magenta image forming unit, and the cyan image forming unit in an individually adjustable manner. By adjusting the adjustment support member, the scanning exposure device of the yellow image forming unit, the scanning exposure device of the magenta image forming unit, and the scanning exposure device of the cyan image forming unit The color image forming apparatus , wherein the position of the scanning exposure apparatus is adjusted and set so that the scanning lines of the plurality of scanning exposure apparatuses are aligned .
3. Yellow image forming section,
Magenta image forming section,
Cyan image forming section,
Black image forming section, and
A transport body for transporting the recording material;
The yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit respectively scan and expose a photosensitive member, a charging device that charges the photosensitive member, and the charged photosensitive member. scanning exposure apparatus for forming an electrostatic latent image, possess the by developing the electrostatic latent image on the photosensitive member developing device for forming a toner image, a primary transfer device, and cleaning device,
The toner image formed in the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit is transferred to the recording material conveyed by the conveying member by the primary transfer device, In a color image forming apparatus that forms a color toner image on a recording material by being superimposed on the recording material,
A first support means for supporting the scanning exposure apparatus at one end in the main scanning direction , and a second support means for supporting the scanning exposure apparatus at the other end in the main scanning direction;
At least one of the first and second support means includes a support member that supports a plurality of the scanning exposure apparatuses in common, and the positions of the plurality of scanning exposure apparatuses are adjusted in common by adjusting the support members. And
At least one of the first and second support means is an adjustment support that supports the plurality of scanning exposure devices of the yellow image forming unit, the magenta image forming unit, and the cyan image forming unit in an individually adjustable manner. By adjusting the adjustment support member, the scanning exposure device of the yellow image forming unit, the scanning exposure device of the magenta image forming unit, and the scanning exposure device of the cyan image forming unit A color image forming apparatus , wherein a position is adjusted and set with respect to the scanning exposure apparatus of a forming unit, thereby adjusting the scanning lines of the plurality of scanning exposure apparatuses to coincide with each other .
4). 4. The scanning exposure apparatus according to any one of 1 to 3, wherein the scanning exposure apparatus is rotated about the first support means, so that the plurality of scanning exposure apparatuses are adjusted in common . Color image forming apparatus.

本発明により、複数の走査露光装置が共通に位置調整されるので、簡単な調整により各走査露光装置が高精度で位置調整される。また、調整量が調整代を超えてしまい、調整できない場合が出るというような不都合が防止される。その結果、簡単な調整により、各画像形成部間の位置ずれが高度に補正される。走査方向の両端で位置調整するので、特に、高精度で位置調整される。更に、複数の走査露光装置を有する露光ユニット全体で位置調整する他に、各走査露光装置が更に位置調整されるので、高い精度で各走査露光装置の位置が設定され、特に、高画質の画像を形成するカラー画像形成装置が実現される。 According to the present invention , since the positions of the plurality of scanning exposure apparatuses are adjusted in common, the positions of the respective scanning exposure apparatuses can be adjusted with high accuracy by simple adjustment. Further, it is possible to prevent such an inconvenience that the adjustment amount exceeds the adjustment allowance and the adjustment cannot be made. As a result, by a simple adjustment, positional deviation between the image forming unit Ru is highly corrected. Since the position is adjusted at both ends in the scanning direction, the position is particularly adjusted with high accuracy. Further, in addition to the position adjustment of the entire exposure unit having a plurality of scanning exposure apparatuses, the position of each scanning exposure apparatus is set with high accuracy because the position of each scanning exposure apparatus is further adjusted. A color image forming apparatus for forming the image is realized.

図２は本発明の実施の形態１に係るカラー画像形成装置の全体を示す図である。 FIG. 2 is a diagram showing the entire color image forming apparatus according to Embodiment 1 of the present invention.

図２において、画像形成装置本体ＧＨは、タンデム型カラー画像形成装置と称せられるもので、複数組の画像形成部１０Ｙ、１０Ｍ、１０Ｃ、１０Ｋと、ベルト状の中間転写体６と給紙搬送手段及び定着装置２４とから成る。 In FIG. 2, the image forming apparatus main body GH is called a tandem type color image forming apparatus, and includes a plurality of sets of image forming units 10Y, 10M, 10C, and 10K, a belt-like intermediate transfer body 6, and a sheet feeding / conveying means. And a fixing device 24.

イエロー色の画像を形成する画像形成部１０Ｙは、感光体１Ｙの周囲に配置された帯電装置２Ｙ、走査露光装置３Ｙ、現像装置４Ｙ、クリーニング装置８Ｙを有する。マゼンタ色の画像を形成する画像形成部１０Ｍは、感光体１Ｍ、帯電装置２Ｍ、走査露光装置３Ｍ、現像装置４Ｍ、クリーニング装置８Ｍを有する。シアン色の画像を形成する画像形成部１０Ｃは、感光体１Ｃ、帯電装置２Ｃ、走査露光装置３Ｃ、現像装置４Ｃ、クリーニング装置８Ｃを有する。黒色画像を形成する画像形成部１０Ｋは、感光体１Ｋ、帯電装置２Ｋ、走査露光装置３Ｋ、現像装置４Ｋ、クリーニング装置８Ｋを有する。 The image forming unit 10Y that forms a yellow image includes a charging device 2Y, a scanning exposure device 3Y, a developing device 4Y, and a cleaning device 8Y disposed around the photoreceptor 1Y. The image forming unit 10M that forms a magenta image includes a photoreceptor 1M, a charging device 2M, a scanning exposure device 3M, a developing device 4M, and a cleaning device 8M. The image forming unit 10C that forms a cyan image includes a photoreceptor 1C, a charging device 2C, a scanning exposure device 3C, a developing device 4C, and a cleaning device 8C. The image forming unit 10K that forms a black image includes a photoreceptor 1K, a charging device 2K, a scanning exposure device 3K, a developing device 4K, and a cleaning device 8K.

中間転写体６は、複数のローラに張架され、回動可能に支持されている。 The intermediate transfer body 6 is stretched around a plurality of rollers and is supported so as to be rotatable.

画像形成部１０Ｙ、１０Ｍ、１０Ｃ、１０Ｋにより形成された各色の画像は、回動する中間転写体６上に一次転写装置７Ｙ、７Ｍ、７Ｃ、７Ｋにより逐次転写されて、合成されたカラートナー像が形成される。給紙カセット２０内に収容された用紙Ｐは、給紙手段２１により給紙され、給紙ローラ２２Ａ、２２Ｂ、２２Ｃ、２２Ｄ、レジストローラ２３等を経て、二次転写装置７Ａに搬送され、用紙Ｐ上にカラートナー像が転写される。カラートナー像が転写された用紙Ｐは、定着装置２４により定着処理され、排紙ローラ２５に挟持されて機外の排紙トレイ２６上に載置される。 Each color image formed by the image forming units 10Y, 10M, 10C, and 10K is sequentially transferred onto the rotating intermediate transfer body 6 by the primary transfer devices 7Y, 7M, 7C, and 7K, and the combined color toner image. Is formed. The paper P stored in the paper feeding cassette 20 is fed by the paper feeding means 21 and is conveyed to the secondary transfer device 7A through the paper feeding rollers 22A, 22B, 22C, 22D, the registration rollers 23, etc. A color toner image is transferred onto P. The sheet P on which the color toner image has been transferred is fixed by the fixing device 24, is sandwiched between the discharge rollers 25, and is placed on the discharge tray 26 outside the apparatus.

一方、二次転写装置７Ａにより記録材Ｐにカラートナー像を転写した後、記録材Ｐが分離した中間転写体６は、クリーニング装置８Ａを通過して、クリーニング装置８Ａによりクリーニングされる。 On the other hand, after the color toner image is transferred to the recording material P by the secondary transfer device 7A, the intermediate transfer body 6 from which the recording material P has been separated passes through the cleaning device 8A and is cleaned by the cleaning device 8A.

画像形成装置本体ＧＨの上部には、原稿を搬送し、搬送される原稿の画像を読み取る画像読取装置ＳＫが設置されている。 An image reading device SK that conveys an original and reads an image of the conveyed original is installed on the upper part of the image forming apparatus main body GH.

走査露光装置３Ｙ、３Ｍ、３Ｃ及び３Ｋは同一の構造を有するので、図３に、Ｙ、Ｍ、Ｃ、Ｋの符号を省略してこれら走査露光装置を示す。 Since the scanning exposure apparatuses 3Y, 3M, 3C and 3K have the same structure, the reference numerals Y, M, C and K are omitted in FIG. 3 to show these scanning exposure apparatuses.

走査露光装置３の各構成部は筺状の枠体３１内に収納されている。 Each component of the scanning exposure apparatus 3 is housed in a bowl-shaped frame 31.

レーザダイオード３２から出射したレーザビームＬＢはコリメータレンズ３３、第１シ
リンドリカルレンズ３４、ポリゴンミラー３５、ｆθレンズ３６、第２シリンドリカルレンズ３７及び光透過板３８を通過して走査露光装置３から出射し、感光体を走査露光する。 The laser beam LB emitted from the laser diode 32 passes through the collimator lens 33, the first cylindrical lens 34, the polygon mirror 35, the fθ lens 36, the second cylindrical lens 37, and the light transmission plate 38, and is emitted from the scanning exposure apparatus 3. The photoconductor is subjected to scanning exposure.

ポリゴンミラー３５はその回転により、レーザＬＢを偏向してＬＢａからＬＢｂの範囲内の走査光を形成する。 The polygon mirror 35 deflects the laser LB by its rotation and forms scanning light within the range of LBa to LBb.

次に、図４、５により走査露光装置３Ｙ、３Ｍ、３Ｃ、３Ｋの支持構造について説明する。図４は走査露光装置３Ｙ、３Ｍ、３Ｃ、３Ｋを有する露光ユニット３０の斜視図、図５は露光ユニット３０の断面図である。 Next, the support structure of the scanning exposure apparatuses 3Y, 3M, 3C, and 3K will be described with reference to FIGS. 4 is a perspective view of the exposure unit 30 having the scanning exposure apparatuses 3Y, 3M, 3C, and 3K, and FIG.

図４において、走査露光装置３Ｙ、３Ｍ、３Ｃ、３Ｋは前方部（図の左端部）の主走査方向Ｘの両端部において、第１支持手段としての支持部材１００及び第２支持手段としての支持部材１０１により支持され、後方部において支持部材１０４により支持される。露光ユニット３０は本体枠１２０（図５に示す）により支持される。走査露光装置３Ｙ、３Ｍ、３Ｃ、３Ｋは図示のように、縦に配置される。支持部材１００、１０１は、曲げ、ねじれ等の変形を生じない剛体であり、金属製の棒状部材からなる。 In FIG. 4, the scanning exposure apparatuses 3Y, 3M, 3C, and 3K have a support member 100 as a first support means and a support as a second support means at both ends in the main scanning direction X of the front portion (left end portion in the figure). It is supported by the member 101 and supported by the support member 104 at the rear part. The exposure unit 30 is supported by a main body frame 120 (shown in FIG. 5). The scanning exposure devices 3Y, 3M, 3C, 3K are arranged vertically as shown in the figure. The support members 100 and 101 are rigid bodies that do not cause deformation such as bending and twisting, and are made of metal rod-shaped members.

露光ユニット３０は支持部材１００を中心に回転可能に本体枠１２０に取り付けられるとともに、走査露光装置３Ｙ、３Ｍ、３Ｃも支持部材１００を中心に露光ユニット３０内で回転可能に取り付けられる。支持部材１０１は後に説明するように位置調整可能である。走査露光装置３Ｙ、３Ｍ、３Ｃはそれぞれ支持部材１００に回転可能に支持され、支持部材１０１に対しては、後に説明するように個々に調整可能である。走査露光装置３Ｋは支持部材１００、１０１に固定される。 The exposure unit 30 is attached to the main body frame 120 so as to be rotatable around the support member 100, and the scanning exposure devices 3Y, 3M, 3C are also attached so as to be rotatable within the exposure unit 30 around the support member 100. The position of the support member 101 can be adjusted as will be described later. The scanning exposure apparatuses 3Y, 3M, and 3C are rotatably supported by the support member 100, and the support member 101 can be individually adjusted as will be described later. The scanning exposure apparatus 3K is fixed to the support members 100 and 101.

走査露光装置３Ｙは、支持部材１０１に固定された支持腕１０２及び支持部材１０４に固定された支持腕１０５により上下方向で支持されるとともに、傾斜した支持面を有し、支持部材１０１に回転可能に取り付けられた調整支持部材としての支持板１０３により水平方向で支持される。走査露光装置３Ｙはその左端部で、支持部材１０４に設けられたばね１０６により図の左方向に押されて左端部に設けられた突起１０７が支持板１０３に圧接することにより、走査露光装置３Ｙの水平方向の位置が設定される。 The scanning exposure apparatus 3Y is supported in the vertical direction by a support arm 102 fixed to the support member 101 and a support arm 105 fixed to the support member 104, and has an inclined support surface, and is rotatable to the support member 101. It is supported in the horizontal direction by a support plate 103 as an adjustment support member attached to. The scanning exposure apparatus 3Y has its left end portion pressed by the spring 106 provided on the support member 104 in the left direction in the drawing and the protrusion 107 provided on the left end portion comes into pressure contact with the support plate 103. The horizontal position is set.

走査露光装置３Ｍ、３Ｃも走査露光装置３Ｙと同様に支持部材１０１で支持される。 Similarly to the scanning exposure apparatus 3Y, the scanning exposure apparatuses 3M and 3C are also supported by the support member 101.

支持部材１００の位置は本体枠１２０に固定であるが、支持部材１０１は次に説明するように、本体枠１２０に対して調整可能に取り付けられる。図６は支持部材１０１の支持部の斜視図、図７は支持部材１０１の支持部の断面図である。 The position of the support member 100 is fixed to the main body frame 120, but the support member 101 is attached to the main body frame 120 so as to be adjustable as will be described below. 6 is a perspective view of a support portion of the support member 101, and FIG. 7 is a cross-sectional view of the support portion of the support member 101.

本体枠１２０には突起１２０ａが形成されるとともに、突起１２０ａを囲むようにねじ支持部材１１０が固定される。支持部材１０１は突起１２０ａとねじ支持部材１１０の間に介在し、露光ユニット３０の背面を押すばね１１１によりねじ支持部材１１０は図５、６の左方向に付勢される。 A projection 120a is formed on the main body frame 120, and the screw support member 110 is fixed so as to surround the projection 120a. The support member 101 is interposed between the protrusion 120a and the screw support member 110, and the screw support member 110 is urged to the left in FIGS.

支持部材１０１の位置調整において、ねじ支持部材１１０に螺入しているねじ１１２を回し、その先端で支持部材１０１の位置を変更する調整が行われる。この調整により、露光ユニット３０は支持部材１００を軸として回転し、図１における走査線Ｋが基準走査線Ｒに一致するように露光走査部３Ｋの位置が調整される。この調整においては、露光ユニット３０が全体として位置調整され、走査露光装置３Ｙ、３Ｍ、３Ｃ及び３Ｋは水平方向に同一量位置調整される。 In adjusting the position of the support member 101, the screw 112 screwed into the screw support member 110 is turned, and adjustment is performed to change the position of the support member 101 at the tip. By this adjustment, the exposure unit 30 rotates about the support member 100, and the position of the exposure scanning unit 3K is adjusted so that the scanning line K in FIG. In this adjustment, the position of the exposure unit 30 is adjusted as a whole, and the positions of the scanning exposure apparatuses 3Y, 3M, 3C, and 3K are adjusted by the same amount in the horizontal direction.

図８は支持板１０３の拡大図である。支持板１０３は図示のように一方の端部が薄く、他方の端部が厚い形状の円板からなり、支持板１０３の上端近傍で支持板１０３の傾斜面に接触する走査露光装置３Ｙの突起１０７は支持板１０３の回転により水平方向に変位して、走査露光装置３Ｙの位置が変更される。 FIG. 8 is an enlarged view of the support plate 103. As shown in the figure, the support plate 103 is formed of a disk having a thin end at one end and a thick end at the other end. The projection of the scanning exposure apparatus 3Y contacts the inclined surface of the support plate 103 in the vicinity of the upper end of the support plate 103. 107 is displaced in the horizontal direction by the rotation of the support plate 103, and the position of the scanning exposure apparatus 3Y is changed.

走査露光装置３Ｙ、３Ｍ、３Ｃはこのような位置調整、即ち、支持板１０３を回転させる調整により、走査露光装置３Ｋに対して個々に位置調整された後に、接着剤で固定される。即ち、図１において、走査線Ｙ、Ｍ、Ｃが走査線Ｋに一致するように調整される。 The scanning exposure apparatuses 3Y, 3M, and 3C are individually positioned with respect to the scanning exposure apparatus 3K by such position adjustment, that is, adjustment that rotates the support plate 103, and then fixed with an adhesive. That is, in FIG. 1, the scanning lines Y, M, and C are adjusted so as to coincide with the scanning line K.

露光ユニット３０の本体枠１２０への組み付け及び調整は次のような作業により行われる。 Assembly and adjustment of the exposure unit 30 to the main body frame 120 are performed by the following operations.

露光ユニット３０を、治具を用いた位置調整により調整し本体枠１２０に取り付ける。次に、取り付けられた走査露光装置３Ｋを用いて画像の書込を行い、黒画像の走査線の位置を検査し、支持部材１０１の位置をねじ１１２を回して調整し、調整後ねじ１１２を接着剤で固定する。次に、走査露光装置３Ｙ、３Ｍ、３Ｃを用いて画像の書込を行い、走査露光装置３Ｙ、３Ｍ、３Ｃの位置調整を、支持板１０３をまわすことにより行って、調整後支持板１０３を接着剤で固定する。 The exposure unit 30 is adjusted by position adjustment using a jig and attached to the main body frame 120. Next, the image is written using the attached scanning exposure device 3K, the position of the scanning line of the black image is inspected, the position of the support member 101 is adjusted by turning the screw 112, and the post-adjustment screw 112 is Secure with adhesive. Next, image writing is performed using the scanning exposure apparatuses 3Y, 3M, and 3C, and the position adjustment of the scanning exposure apparatuses 3Y, 3M, and 3C is performed by rotating the support plate 103, and the post-adjustment support plate 103 is mounted. Secure with adhesive.

図９は本発明の実施の他の例における露光走査装置の斜視図である。 FIG. 9 is a perspective view of an exposure scanning apparatus according to another embodiment of the present invention.

本例においては、第１支持手段としての支持部材１００及び第２支持手段おしての支持部材１０１がともに調整可能に本体枠に取り付けられる。調整部材１００、１０１はともに、図６、７に示す支持構造により本体枠１２０に取り付けられ、位置調整された後に、本体枠１２０に固定される。 In this example, the support member 100 as the first support means and the support member 101 as the second support means are both attached to the body frame so as to be adjustable. Both the adjustment members 100 and 101 are attached to the main body frame 120 by the support structure shown in FIGS. 6 and 7, and after being adjusted in position, are fixed to the main body frame 120.

図１０は本発明の実施の形態２に係るカラー画像形成装置の全体を示す図である。 FIG. 10 is a diagram showing an entire color image forming apparatus according to Embodiment 2 of the present invention.

図１０において、ローラ２０、２１に張架されたベルト状の感光体１に対向して、その周囲に帯電装置２、クリーニング装置８、画像形成部１０Ｙ、１０Ｍ、１０Ｃ、１０Ｋが配置される。 In FIG. 10, the charging device 2, the cleaning device 8, and the image forming units 10 Y, 10 M, 10 C, and 10 K are disposed around the belt-shaped photoconductor 1 stretched around the rollers 20 and 21.

イエロートナー像を形成する画像形成部１０Ｙは、走査露光装置３Ｙ及び現像装置４Ｙを有し、マゼンタトナー像を形成する画像形成部１０Ｍは、走査露光装置３Ｍ及び現像装置４Ｍを有し、シアントナー像を形成する画像形成部１０Ｃは、走査露光装置３Ｃ及び現像装置４Ｃを有し、黒トナー像を形成する画像形成部１０Ｋは、走査露光装置３Ｋ、現像装置４Ｋを有する。 The image forming unit 10Y that forms a yellow toner image has a scanning exposure device 3Y and a developing device 4Y, and the image forming unit 10M that forms a magenta toner image has a scanning exposure device 3M and a developing device 4M. An image forming unit 10C that forms an image includes a scanning exposure device 3C and a developing device 4C, and an image forming unit 10K that forms a black toner image includes a scanning exposure device 3K and a developing device 4K.

感光体１に対向して更に、転写ローラ７、１２が配置され、転写ローラ７と転写ローラ１２との間に記録材Ｐが通される。 Further, transfer rollers 7 and 12 are arranged to face the photoreceptor 1, and the recording material P is passed between the transfer roller 7 and the transfer roller 12.

感光体１の矢印で示す方向の循環移動により画像形成が行われ、帯電装置２により帯電された感光体１には、露光装置３Ｙによる露光及び現像装置４Ｙの現像によりイエロートナー像が形成される。同様にして感光体１が画像形成部１０Ｍ、１０Ｃ、１０Ｋを通過して、感光体上にマゼンタトナー像、シアントナー像及び黒トナー像が形成され、これらの単色トナー像が重ね合わせ形成されることにより、感光体１上にカラートナー像が形成される。 Image formation is performed by the circular movement of the photosensitive member 1 in the direction indicated by the arrow, and a yellow toner image is formed on the photosensitive member 1 charged by the charging device 2 by exposure by the exposure device 3Y and development by the developing device 4Y. . Similarly, the photosensitive member 1 passes through the image forming units 10M, 10C, and 10K, and a magenta toner image, a cyan toner image, and a black toner image are formed on the photosensitive member, and these monochromatic toner images are formed in an overlapping manner. As a result, a color toner image is formed on the photoreceptor 1.

形成されたカラートナー像が転写ローラ７、１２により記録材Ｐに転写され、転写後に記録材Ｐが定着装置２４を通過してカラトナー像が記録材Ｐに定着される。 The formed color toner image is transferred to the recording material P by the transfer rollers 7 and 12, and after the transfer, the recording material P passes through the fixing device 24 and the color toner image is fixed to the recording material P.

本実施の形態における走査露光装置３Ｙ、３Ｍ、３Ｃ及び３Ｋは、図３に示したレーザを光源とし、偏向手段により走査光を形成するレーザ走査露光装置からなり、実施の形態１に関して説明した前記の支持機構と同様な支持機構により支持される。 The scanning exposure apparatuses 3Y, 3M, 3C, and 3K in the present embodiment are laser scanning exposure apparatuses that use the laser shown in FIG. 3 as a light source and form scanning light by deflection means, and have been described with reference to the first embodiment. It is supported by a support mechanism similar to this support mechanism.

図１１は本発明の実施の形態３に係るカラー画像形成装置の全体を示す図である。 FIG. 11 is a diagram showing the entire color image forming apparatus according to Embodiment 3 of the present invention.

図１１において、画像形成部１０Ｙ、１０Ｍ、１０Ｃ、１０Ｋが搬送ベルト３０に対向して、その上方に配置される。 In FIG. 11, the image forming units 10 Y, 10 M, 10 C, and 10 K are disposed above and opposed to the conveyance belt 30.

画像形成部１０Ｙは、感光体１Ｙ、帯電装置２Ｙ、走査露光装置３Ｙ、現像装置４Ｙ、一次転写装置７Ｙ及びクリーニング装置８Ｙを有し、画像形成部１０Ｍは、感光体１Ｍ、帯電装置２Ｍ、走査露光装置３Ｍ、現像装置４Ｍ、一次転写装置７Ｍ及びクリーニング装置８Ｍを有し、画像形成部１０Ｃは、感光体１Ｃ、帯電装置２Ｃ、走査露光装置３Ｃ、現像装置４Ｃ、一次転写装置７Ｃ及びクリーニング装置８Ｃを有し、画像形成部１０Ｋは、感光体１Ｋ、帯電装置２Ｋ、走査露光装置３Ｋ、現像装置４Ｋ、一次転写装置７Ｋ及びクリーニング装置８Ｋを有する。搬送ベルト３０はローラ１０、１１により支持され、矢印で示すように循環移動する。 The image forming unit 10Y includes a photoreceptor 1Y, a charging device 2Y, a scanning exposure device 3Y, a developing device 4Y, a primary transfer device 7Y, and a cleaning device 8Y. The image forming unit 10M includes a photoreceptor 1M, a charging device 2M, and a scanning device. The image forming unit 10C includes an exposure device 3M, a developing device 4M, a primary transfer device 7M, and a cleaning device 8M. The image forming unit 10C includes a photoreceptor 1C, a charging device 2C, a scanning exposure device 3C, a developing device 4C, a primary transfer device 7C, and a cleaning device. The image forming unit 10K includes a photoreceptor 1K, a charging device 2K, a scanning exposure device 3K, a developing device 4K, a primary transfer device 7K, and a cleaning device 8K. The conveyor belt 30 is supported by the rollers 10 and 11 and circulates and moves as indicated by arrows.

搬送ベルト３０により搬送された記録材Ｐに対して各画像形成部において形成されたイエロートナー像、マゼンンタトナー像、シアントナー像及び黒トナー像が記録材Ｐに転写され、これら単色トナー像が重なってカラートナー像が記録材Ｐ上に形成れる。記録材Ｐ上のカラートナー像は定着装置２４により定着される。 A yellow toner image, a magenta toner image, a cyan toner image, and a black toner image formed in each image forming unit on the recording material P conveyed by the conveyance belt 30 are transferred to the recording material P, and these single color toner images overlap. A color toner image is formed on the recording material P. The color toner image on the recording material P is fixed by the fixing device 24.

記録材Ｐが分離された搬送ベルト３０はクリーニング装置８Ａによりクリーニングされる。 The conveying belt 30 from which the recording material P has been separated is cleaned by the cleaning device 8A.

走査線の位置調整の概念図である。It is a conceptual diagram of the position adjustment of a scanning line. 本発明の実施の形態１に係るカラー画像形成装置の全体を示す図である。1 is a diagram illustrating an entire color image forming apparatus according to a first embodiment of the present invention. 走査露光装置の平面断面図である。It is plane sectional drawing of a scanning exposure apparatus. 露光ユニットの斜視図である。It is a perspective view of an exposure unit. 露光ユニットの断面図である。It is sectional drawing of an exposure unit. 支持部材の支持部の斜視図である。It is a perspective view of the support part of a support member. 支持部材を支持部の断面図である。It is sectional drawing of a support part. 支持板の拡大図である。It is an enlarged view of a support plate. 本発明の実施の形態の他の例における露光走査装置の斜視図である。It is a perspective view of the exposure scanning apparatus in the other example of embodiment of this invention. 本発明の実施の形態２に係るカラー画像形成装置の全体を示す図である。It is a figure which shows the whole color image forming apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係るカラー画像形成装置の全体を示す図である。It is a figure which shows the whole color image forming apparatus which concerns on Embodiment 3 of this invention.

Explanation of symbols

３Ｙ、３Ｍ、３Ｃ、３Ｍ走査露光装置
１００、１０１、１０４支持部材
１０２、１０５支持腕
１０３支持板
１０６、１１１ばね
１２０本体枠 3Y, 3M, 3C, 3M Scanning exposure apparatus 100, 101, 104 Support member 102, 105 Support arm 103 Support plate 106, 111 Spring 120 Body frame

Claims

Yellow image forming section,
Magenta image forming section,
Cyan image forming section,
Black image forming section,
Intermediate transfer member, and
With a secondary transfer device,
Each of the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit scans and exposes a photosensitive member, a charging device that charges the photosensitive member, and the charged photosensitive member. scanning exposure apparatus that forms a latent electrostatic image, developing the latent electrostatic image on the photosensitive member developing apparatus for forming toner images, have a primary transfer device, and a cleaning device Te,
The yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit are disposed to face the intermediate transfer member, and the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and transferring the toner image formed in the black image forming unit on the intermediate transfer member by the primary transfer device, by superimposing on the intermediate transfer body, the color toner on the intermediate transfer body In a color image forming apparatus that forms an image and transfers the formed color toner image to a recording material by the secondary transfer device.
A first support means for supporting the scanning exposure apparatus at one end in the main scanning direction , and a second support means for supporting the scanning exposure apparatus at the other end in the main scanning direction;
At least one of the first and second support means supports a plurality of the scanning exposure devices of the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit in common. a support member, the adjustment of the support member, Rutotomoni plurality of the scanning exposure apparatus is adjusted common position,
At least one of the first and second support means is an adjustment support that supports the plurality of scanning exposure devices of the yellow image forming unit, the magenta image forming unit, and the cyan image forming unit in an individually adjustable manner. By adjusting the adjustment support member, the scanning exposure device of the yellow image forming unit, the scanning exposure device of the magenta image forming unit, and the scanning exposure device of the cyan image forming unit A color image forming apparatus , wherein a position is adjusted and set with respect to the scanning exposure apparatus of a forming unit, thereby adjusting the scanning lines of the plurality of scanning exposure apparatuses to coincide with each other .

A photoconductor, a yellow image forming unit, a magenta image forming unit, a cyan image forming unit, a black image forming unit, and a transfer device; and the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit. Each image forming unit has a scanning exposure device and a developing device,
The yellow image forming unit, the magenta image forming unit, the cyan image forming unit, the black image forming unit, and the transfer device are arranged facing the photoconductor,
A toner image is formed on the photoconductor by the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit, and is superposed on the photoconductor. In a color image forming apparatus, a color toner image is formed on the recording material, and the formed color toner image is transferred to a recording material by the transfer device .
A first support means for supporting the scanning exposure apparatus at one end in the main scanning direction , and a second support means for supporting the scanning exposure apparatus at the other end in the main scanning direction;
At least one of the first and second support means includes a support member that supports a plurality of the scanning exposure apparatuses in common, and the positions of the plurality of scanning exposure apparatuses are adjusted in common by adjusting the support members. And
At least one of the first and second support means is an adjustment support member that supports the plurality of scanning exposure apparatuses of the yellow image forming unit, the magenta image forming unit, and the cyan image forming unit in an individually adjustable manner. By adjusting the adjustment support member, the scanning exposure device of the yellow image forming unit, the scanning exposure device of the magenta image forming unit, and the scanning exposure device of the cyan image forming unit The color image forming apparatus , wherein the position of the scanning exposure apparatus is adjusted and set so that the scanning lines of the plurality of scanning exposure apparatuses are aligned .

Yellow image forming section,
Magenta image forming section,
Cyan image forming section,
Black image forming section, and
A transport body for transporting the recording material;
The yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit respectively scan and expose a photosensitive member, a charging device that charges the photosensitive member, and the charged photosensitive member. scanning exposure apparatus for forming an electrostatic latent image, possess the by developing the electrostatic latent image on the photosensitive member developing device for forming a toner image, a primary transfer device, and cleaning device,
The toner image formed in the yellow image forming unit, the magenta image forming unit, the cyan image forming unit, and the black image forming unit is transferred to the recording material conveyed by the conveying member by the primary transfer device, In a color image forming apparatus that forms a color toner image on a recording material by being superimposed on the recording material,
A first support means for supporting the scanning exposure apparatus at one end in the main scanning direction , and a second support means for supporting the scanning exposure apparatus at the other end in the main scanning direction;
At least one of the first and second support means includes a support member that supports a plurality of the scanning exposure apparatuses in common, and the positions of the plurality of scanning exposure apparatuses are adjusted in common by adjusting the support members. And
At least one of the first and second support means is an adjustment support that supports the plurality of scanning exposure devices of the yellow image forming unit, the magenta image forming unit, and the cyan image forming unit in an individually adjustable manner. By adjusting the adjustment support member, the scanning exposure device of the yellow image forming unit, the scanning exposure device of the magenta image forming unit, and the scanning exposure device of the cyan image forming unit A color image forming apparatus , wherein a position is adjusted and set with respect to the scanning exposure apparatus of a forming unit, thereby adjusting the scanning lines of the plurality of scanning exposure apparatuses to coincide with each other .

4. The position of the plurality of scanning exposure apparatuses is adjusted in common by rotating the scanning exposure apparatus about the first support unit. 5. Color image forming apparatus.