JP2015031708A - Mechanism for removing material deposited, process cartridge, and image forming apparatus - Google Patents

Mechanism for removing material deposited, process cartridge, and image forming apparatus Download PDF

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JP2015031708A
JP2015031708A JP2013158769A JP2013158769A JP2015031708A JP 2015031708 A JP2015031708 A JP 2015031708A JP 2013158769 A JP2013158769 A JP 2013158769A JP 2013158769 A JP2013158769 A JP 2013158769A JP 2015031708 A JP2015031708 A JP 2015031708A
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deposit
latent image
image carrier
width
cleaning
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JP6210366B2 (en
JP2015031708A5 (en
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藤田 雅也
Masaya Fujita
雅也 藤田
泰英 松野
Yasuhide Matsuno
泰英 松野
中村 賢二
Kenji Nakamura
賢二 中村
允紀 吉▲瀬▼
Masanori Kichise
允紀 吉▲瀬▼
剛司 山下
Goji Yamashita
剛司 山下
哲丸 藤田
Tetsumaru Fujita
哲丸 藤田
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Ricoh Co Ltd
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Ricoh Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for removing a material deposited, configured to remove a material deposited on a latent image carrier, which is generated near an end of a recording-medium maximum area width on the latent image carrier, while preventing an image forming apparatus from being enlarged.SOLUTION: A deposited material removing mechanism 30 for removing a material deposited on a photoreceptor 3 includes: a cleaning blade 5 having a cleaning-blade width L5 wider than a maximum sheet width L3 of a sheet P in a photoreceptor axial direction; and a deposited material removing member 31(a, b) for removing the material deposited on the photoreceptor 3, in addition to the cleaning blade 5. The deposited material removing member 31(a, b) is brought into contact with the photoreceptor 3 from the inside of a maximum image area width L1 in the photoreceptor axial direction to the outside of the maximum sheet width L3 of the sheet P.

Description

本発明は、感光体等の潜像担持体表面に付着した付着物を除去する付着物除去機構、この付着物除去機構を有したプロセスカートリッジ、及びこれらのいずれかを備えた画像形成装置に関するものである。   The present invention relates to a deposit removing mechanism for removing deposits attached to the surface of a latent image carrier such as a photoconductor, a process cartridge having the deposit removing mechanism, and an image forming apparatus including any of these. It is.

プリンタ、ファックス、複写機等のトナーを用いる電子写真方式の画像形成装置では、トナーやトナーからの遊離物(シリカ)や、用紙等の記録媒体から出る紙粉やタルク成分等の付着物が感光体等の潜像担持体の表面に付着することがある。
例えば、特許文献1には、次のような付着物の除去方法が記載されている。
潜像担持体を帯電装置で一様に帯電した後、露光装置で露光することで、次のような領域にトナーが付着する電位部(以下、清掃電位部という)を形成する。潜像担持体の移動方向の画像形成領域外であって、画像形成を行う記録媒体の搬送方向に平行な記録媒体の端部(以下、以下、媒体端部という)の延長線上を跨ぐ潜像担持体の所定の領域である。
そして、清掃電位部に現像装置で付着させたトナー(以下、清掃用トナーという)を用いて、潜像担持体上の残留トナーを清掃(除去)するクリーニング装置(クリーニングブレード)で、潜像担持体上の媒体端部近傍の領域に付着した付着物を除去する。
In electrophotographic image forming apparatuses that use toner such as printers, fax machines, and copiers, toner, toner-free material (silica), and paper dust and talc components that come out of recording media such as paper are exposed to light. May adhere to the surface of a latent image carrier such as a body.
For example, Patent Document 1 describes the following deposit removal method.
The latent image carrier is uniformly charged with a charging device and then exposed with an exposure device, thereby forming a potential portion (hereinafter referred to as a cleaning potential portion) where toner adheres to the following region. A latent image that extends outside the image forming area in the moving direction of the latent image carrier and straddles the extended line of the end of the recording medium (hereinafter referred to as the medium end) parallel to the transport direction of the recording medium on which the image is formed. This is a predetermined area of the carrier.
Then, the latent image carrier is cleaned by a cleaning device (cleaning blade) that cleans (removes) residual toner on the latent image carrier using toner (hereinafter referred to as cleaning toner) adhered to the cleaning potential portion by a developing device. Remove deposits attached to the area near the edge of the medium on the body.

上記のように清掃用トナーを用いて除去することで、媒体端部近傍に生じるタルク成分等の、残留トナーを清掃するクリーニング装置だけでは完全に除去することが困難な付着物も除去できるというものである。
また、特許文献1には、清掃電位部を形成する露光方式が、非露光部にトナーを付着させる電位部(静電潜像)を形成する背景部露光、及び露光部にトナーを付着させる電位部を形成する画像部露光のいずれであっても適用可能である旨記載されている。
By removing using cleaning toner as described above, it is possible to remove deposits such as talc components generated near the edge of the medium, which are difficult to remove completely with only a cleaning device that cleans residual toner. It is.
Patent Document 1 discloses that an exposure method for forming a cleaning potential portion is a background portion exposure for forming a potential portion (electrostatic latent image) for attaching toner to a non-exposed portion, and a potential for attaching toner to an exposed portion. It is described that any of image portion exposures for forming a portion is applicable.

しかし、特許文献1に記載のような付着物の除去方法だと、次のような問題があった。
背景部露光では、トナーを付着させる電位部を帯電装置による潜像担持体の帯電により形成している。このため、背景部露光で清掃電位部を形成するためには、帯電装置による潜像担持体の帯電幅(以下、単に帯電幅という)を、潜像担持体の最大画像形成領域幅(以下、単に最大画像領域幅という)よりも広い清掃電位部を包括できる幅まで広くせざるを得ない。
また、画像部露光では、トナーを付着させる電位部を露光装置による潜像担持体の露光により形成している。このため、画像部露光で清掃電位部を形成するためには、露光装置による潜像担持体の最大露光幅(以下、単に最大露光幅という)を、最大画像領域幅よりも広い清掃電位部を包括できる幅まで広くせざるを得ない。
However, the deposit removal method described in Patent Document 1 has the following problems.
In the background portion exposure, the potential portion to which the toner is attached is formed by charging the latent image carrier with a charging device. For this reason, in order to form the cleaning potential portion by the background exposure, the charging width of the latent image carrier by the charging device (hereinafter simply referred to as the charging width) is set to the maximum image forming area width (hereinafter referred to as the latent image carrier). The width must be wide enough to include a cleaning potential portion wider than simply the maximum image area width.
In image portion exposure, a potential portion to which toner is attached is formed by exposing a latent image carrier with an exposure device. For this reason, in order to form the cleaning potential portion by image portion exposure, the maximum potential exposure width (hereinafter simply referred to as the maximum exposure width) of the latent image carrier by the exposure device is set to a cleaning potential portion wider than the maximum image region width. The width must be wide enough to include.

したがって、特許文献1に記載の付着物の除去方法は、背景部露光では帯電幅を、画像部露光では最大露光幅を、清掃電位部を包括する分だけ最大画像領域幅よりも広くしているものと考えられる。
これらのように帯電幅又は最大露光幅を広くすると、帯電装置又は露光装置の幅が広くなってしまい、画像形成装置が大型化するおそれがある。
Therefore, in the method for removing deposits described in Patent Document 1, the charging width is set to be larger in the background portion exposure, the maximum exposure width in the image portion exposure is wider than the maximum image region width by the amount including the cleaning potential portion. It is considered a thing.
When the charging width or the maximum exposure width is increased as described above, the width of the charging device or the exposure device is increased, and the image forming apparatus may be increased in size.

なお、特許文献2には、次のような画像形成装置が記載されている。
露光装置に光書込ヘッドを用い、潜像担持体と光書込ヘッドとの間に、これらの距離を規制するスペーサを2箇所設けている。これらのスペーサは、画像形成を行う記録媒体の最大領域幅との位置関係は不明であるが、光書込ヘッドによる潜像担持体の最大露光幅の外側に接触するように設けられている。
また、転写後の潜像担持体上に残った残留トナーを清掃するクリーニング装置に有したクリーニングブラシを、転写部と帯電装置との間に設けている。
そして、各スペーサの潜像担持体の移動方向上流側にスペーサで塞き止められて滞留したトナー等が潜像担持体との摩擦熱で溶融して付着するのを防ぐため、クリーニングブラシとは別に、各スペーサと帯電装置との間にそれぞれクリーニングブレードを設けている。
Note that Patent Document 2 describes the following image forming apparatus.
An optical writing head is used in the exposure apparatus, and two spacers are provided between the latent image carrier and the optical writing head to regulate these distances. These spacers are provided so as to be in contact with the outside of the maximum exposure width of the latent image carrier by the optical writing head, although the positional relationship with the maximum area width of the recording medium on which image formation is performed is unknown.
Further, a cleaning brush provided in a cleaning device that cleans residual toner remaining on the latent image carrier after transfer is provided between the transfer unit and the charging device.
What is a cleaning brush, in order to prevent the toner, etc., that is blocked by the spacer and staying on the upstream side in the moving direction of the latent image carrier of each spacer from melting and adhering due to frictional heat with the latent image carrier? Separately, a cleaning blade is provided between each spacer and the charging device.

この画像形成装置で仮に、クリーニングブラシとクリーニングブレードの清掃領域が記録媒体の最大領域幅の端部近傍で重なっていれば、2度除去動作が行えるため、クリーニングブラシだけでは除去できない、前記端部近傍の付着物も除去できるものと考えられる。
しかし、クリーニングブラシの清掃領域に関しては明記されておらず、記録媒体の最大領域幅よりも広い清掃領域を有しているか否か不明である。さらに、各スペーサと帯電装置との間にそれぞれ設ける各クリーニングブレードの幅に関しては、各スペーサの幅より広ければ良いとしか記載されておらず、潜像担持体上における記録媒体の最大領域幅の内側から外側まで接触しているか否か不明である。
各クリーニングブレードの幅が、記録媒体の最大領域幅の内側から外側まで接触していないと、クリーニングブラシの清掃領域が記録媒体の最大領域幅よりも広くても、潜像担持体上における記録媒体の最大領域幅の端部近傍を2度除去動作を行うことはできない。このため、特許文献2に記載の画像形成装置では、潜像担持体上における記録媒体の最大領域幅の端部近傍で生じる潜像担持体上のタルク成分等の付着物を除去できないおそれがある。
In this image forming apparatus, if the cleaning area of the cleaning brush and the cleaning blade overlap in the vicinity of the end of the maximum area width of the recording medium, the removal operation can be performed twice. It is thought that nearby deposits can also be removed.
However, the cleaning area of the cleaning brush is not specified, and it is unclear whether the cleaning area has a cleaning area wider than the maximum area width of the recording medium. Furthermore, the width of each cleaning blade provided between each spacer and the charging device is only described as being wider than the width of each spacer, and the maximum area width of the recording medium on the latent image carrier is described. Whether it is in contact from the inside to the outside is unknown.
If the width of each cleaning blade is not in contact from the inside to the outside of the maximum area width of the recording medium, even if the cleaning area of the cleaning brush is wider than the maximum area width of the recording medium, the recording medium on the latent image carrier The removal operation cannot be performed twice near the end of the maximum region width. For this reason, the image forming apparatus described in Patent Document 2 may not be able to remove deposits such as talc components on the latent image carrier that occur near the edge of the maximum area width of the recording medium on the latent image carrier. .

本発明は以上の問題点に鑑みなされたものであり、その目的は、画像形成装置の大型化を抑制しつつ、潜像担持体上における記録媒体の最大領域幅の端部近傍で生じる潜像担持体上の付着物も除去可能な付着物除去機構を提供することである。   The present invention has been made in view of the above problems, and an object of the present invention is to suppress the increase in size of the image forming apparatus and to form a latent image generated in the vicinity of the end of the maximum area width of the recording medium on the latent image carrier. An object of the present invention is to provide a deposit removing mechanism capable of removing deposits on a carrier.

上記目的を達成するために、請求項1に記載の発明は、転写後に潜像担持体上に残った残留トナーを清掃し、前記潜像担持体の移動方向に垂直な幅方向における記録媒体の最大領域幅よりも広い清掃領域を有するクリーニング部材とは別に設けられ、前記潜像担持体上に付着した付着物を除去する除去部材を備えた潜像担持体上の付着物を除去する付着物除去機構であって、前記除去部材は、前記潜像担持体の前記幅方向における、最大画像領域幅の内側から、前記記録媒体の最大領域幅の外側にわたって接触することを特徴とするものである。   In order to achieve the above object, the invention described in claim 1 is to clean the residual toner remaining on the latent image carrier after the transfer, and to record the recording medium in the width direction perpendicular to the moving direction of the latent image carrier. A deposit that is provided separately from a cleaning member having a cleaning area wider than the maximum region width, and that removes deposits on the latent image carrier provided with a removing member that removes deposits adhered to the latent image carrier. In the removing mechanism, the removing member contacts from the inside of the maximum image area width in the width direction of the latent image carrier to the outside of the maximum area width of the recording medium. .

よって、本発明は、画像形成装置の大型化を抑制しつつ、潜像担持体上における記録媒体の最大領域幅の端部近傍で生じる潜像担持体上の付着物も除去可能な付着物除去機構を提供できる。   Therefore, the present invention eliminates the deposit on the latent image carrier that can also remove the deposit on the latent image carrier near the end of the maximum area width of the recording medium while suppressing the enlargement of the image forming apparatus. A mechanism can be provided.

一実施形態に係るプリンタの構成を示す概略構成図。1 is a schematic configuration diagram illustrating a configuration of a printer according to an embodiment. 一実施形態に係るプロセスカートリッジの主要な構成を説明する断面説明図。Cross-sectional explanatory drawing explaining the main structures of the process cartridge which concerns on one Embodiment. 従来例に係るプロセスカートリッジの主要な構成を説明する断面説明図。Sectional explanatory drawing explaining the main structures of the process cartridge which concerns on a prior art example. 従来例に係るプロセスカートリッジの主要な構成の感光体軸方向の寸法関係、及び問題点の説明図。FIG. 7 is an explanatory diagram of a dimensional relationship in a photosensitive member axial direction of a main configuration of a process cartridge according to a conventional example and problems. 実施例1に係るプロセスカートリッジの主要な構成の感光体軸方向の寸法関係の説明図。FIG. 3 is an explanatory diagram of a dimensional relationship in a photosensitive member axial direction of a main configuration of the process cartridge according to the first embodiment. 付着物除去部材の感光体回転方向上流側の辺が、感光体軸方向に平行な付着物除去機構を設けることにより生じる問題点の説明図。FIG. 6 is an explanatory diagram of problems caused by providing a deposit removal mechanism in which the upstream side of the deposit removal member in the photosensitive member rotation direction is parallel to the photoreceptor axis direction. 実施例2に係る付着物除去機構の説明図。Explanatory drawing of the deposit | attachment removal mechanism which concerns on Example 2. FIG. 付着物除去部材の感光体回転方向上流側の辺が、感光体軸方向に対して傾斜を有した付着物除去機構を設けた構成に残る課題の説明図。Explanatory drawing of the subject which remains in the structure which provided the deposit | attachment removal mechanism in which the edge | side of the photoreceptor rotation direction upstream of a deposit | attachment removal member has inclination with respect to the photoconductor axial direction. 実施例3に係る付着物除去機構に有した付着物除去部材の説明図。Explanatory drawing of the deposit | attachment removal member which it had in the deposit removal mechanism which concerns on Example 3. FIG. 実施例3に係る付着物除去部材の傾斜接触面の幅である先端幅と付着物除去部材に付与される荷重との関係を説明するグラフ。10 is a graph for explaining the relationship between the tip width, which is the width of the inclined contact surface of the deposit removing member according to Example 3, and the load applied to the deposit removing member. 実施例4に係る付着物除去機構の説明図。Explanatory drawing of the deposit | attachment removal mechanism which concerns on Example 4. FIG. 実施例4に係る付着物除去機構に有した付着物除去部材の説明図。Explanatory drawing of the deposit | attachment removal member which it had in the deposit removal mechanism which concerns on Example 4. FIG.

以下、本発明を電子写真方式のモノクロ画像形成装置であるプリンタ(以下、プリンタ100という)に適用した一実施形態について、複数の実施例を挙げて説明する。
本実施形態のプリンタ100は、次の構成に係る点が最大の特徴となっている。転写後に潜像担持体であるドラム状の感光体上に残ったトナーを清掃するクリーニング部材とは別に、感光体上における感光体軸方向の記録媒体である用紙Pの最大用紙幅の端部近傍に生じるタルク成分等の付着物も除去できる付着物除去機構を設けている。
そして、付着物除去機構の除去部材は、感光体の感光体軸方向における、最大画像領域幅の内側から、用紙Pの最大領域幅の外側にわたって接触する構成である。
Hereinafter, an embodiment in which the present invention is applied to a printer (hereinafter referred to as a printer 100) which is an electrophotographic monochrome image forming apparatus will be described with reference to a plurality of examples.
The printer 100 according to the present embodiment is characterized by the following features. Apart from the cleaning member for cleaning the toner remaining on the drum-shaped photoconductor as a latent image carrier after the transfer, in the vicinity of the end of the maximum paper width of the paper P as the recording medium on the photoconductor in the axial direction of the photoconductor A deposit removing mechanism capable of removing deposits such as talc components is also provided.
The removing member of the deposit removing mechanism is configured to contact from the inner side of the maximum image region width to the outer side of the maximum region width of the paper P in the photosensitive member axial direction of the photosensitive member.

まず、プリンタ100の基本的な全体構成及び動作について、図を用いて説明する。
図1は、本実施形態に係るプリンタ100の構成を示す概略構成図、図2は、プロセスカートリッジ2の主要な構成を説明する断面説明図である。
First, the basic overall configuration and operation of the printer 100 will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram illustrating the configuration of the printer 100 according to the present embodiment, and FIG. 2 is a cross-sectional explanatory diagram illustrating the main configuration of the process cartridge 2.

図1に示すように、このプリンタ100は、装置本体110のほぼ中央部に潜像担持体であるドラム状の感光体3を備えたプロセスカートリッジ2を備えている。このプロセスカートリッジ2の下方には、プロセスカートリッジ2で形成されたドラム状の感光体3上のトナー像を記録媒体である用紙Pに転写する転写ローラ70を備えている。装置本体110の下部には、感光体3上のトナー像を転写するための用紙Pを積載して収容する給紙カセット11、給紙カセット11から用紙Pを順次、感光体3と転写ローラ70との間の転写部に送り出す給紙ローラ12を備えている。また、プロセスカートリッジ2の図中左方には、用紙P上のトナー像を定着する定着装置80等を備えている。   As shown in FIG. 1, the printer 100 includes a process cartridge 2 that includes a drum-shaped photosensitive member 3 that is a latent image carrier at an approximately central portion of an apparatus main body 110. Below the process cartridge 2, there is provided a transfer roller 70 for transferring the toner image formed on the drum-shaped photoreceptor 3 formed by the process cartridge 2 onto a sheet P as a recording medium. In the lower part of the apparatus main body 110, a sheet feeding cassette 11 for storing and storing sheets P for transferring a toner image on the photosensitive member 3, and the sheet P from the sheet feeding cassette 11 are sequentially placed on the photosensitive member 3 and the transfer roller 70. Is provided with a paper feed roller 12 for feeding to a transfer portion between the two. Further, on the left side of the process cartridge 2 in the drawing, a fixing device 80 for fixing the toner image on the paper P is provided.

図2に示すように、このプロセスカートリッジ2は、感光体3の回転方向に対し順に、帯電ローラ6、露光装置60、現像装置の現像ローラ4、感光体クリーニング装置のクリーニングブレード5などが配置された作像部を構成している。このプロセスカートリッジ2においては、感光体3と感光体3の周囲に配設される帯電ローラ6、露光装置60、現像ローラ4、クリーニングブレード5が1つのユニットとして共通の支持体に支持され、プリンタ本体に対して一体に着脱可能になっている。ここで、露光装置60には、光書込ヘッド61が用いられており、感光体3と光書込ヘッド61との間には、両者の距離を規制する規制部材であるスペーサ部材21(a,b)が配置されており、感光体3と光書込ヘッド61の間隔を決める役目と果たしている。
そして、詳しくは後述するが、スペーサ部材21(a,b)と帯電ローラ6との間に、感光体軸方向の用紙Pの最大用紙幅端部近傍で生じる付着物も除去できる付着物除去機構30に備えた除去部材である付着物除去部材31(a,b)が配置されている。また、この付着物除去部材31(a,b)を感光体3に向けて付勢する付勢部材である付勢ばね32(a,b)と、各スペーサ部材21(a,b)を付勢ばね32(a,b)の付勢方向に移動可能に支持する支持部材(不図示)も配置されている。
As shown in FIG. 2, the process cartridge 2 includes a charging roller 6, an exposure device 60, a developing roller 4 of the developing device, a cleaning blade 5 of the photosensitive member cleaning device, and the like in order with respect to the rotation direction of the photosensitive member 3. The image forming part is configured. In this process cartridge 2, the photosensitive member 3 and the charging roller 6, the exposure device 60, the developing roller 4, and the cleaning blade 5 disposed around the photosensitive member 3 are supported as a single unit on a common support, and the printer It can be attached to and detached from the main body. Here, an optical writing head 61 is used in the exposure device 60, and a spacer member 21 (a) that is a regulating member that regulates the distance between the photosensitive member 3 and the optical writing head 61 is used. , B) are arranged and serve to determine the distance between the photosensitive member 3 and the optical writing head 61.
As will be described in detail later, an adhering matter removing mechanism capable of removing adhering matter generated near the maximum paper width end portion of the paper P in the photosensitive member axial direction between the spacer member 21 (a, b) and the charging roller 6. An attached matter removing member 31 (a, b), which is a removing member provided in 30, is disposed. Further, an urging spring 32 (a, b) which is an urging member for urging the deposit removing member 31 (a, b) toward the photosensitive member 3 and each spacer member 21 (a, b) are attached. A support member (not shown) that supports the spring 32 (a, b) so as to be movable in the biasing direction is also disposed.

なお、本実施形態の光書込ヘッド61の発光素子としては、LEDもしくは有機EL素子を好適に用いることができる。これらの発光素子を用いることで、露光装置60をコンパクトに構成してプリンタ100の小型化に貢献できるとともに、感光体3上に良好な静電潜像を形成することができる。   In addition, as a light emitting element of the optical writing head 61 of this embodiment, an LED or an organic EL element can be suitably used. By using these light emitting elements, the exposure device 60 can be made compact to contribute to the miniaturization of the printer 100 and a good electrostatic latent image can be formed on the photoreceptor 3.

本実施形態のプロセスカートリッジ2では、感光体3の回転と共に、まず帯電ローラ6で感光体3表面を一様に帯電する。次いで、画像データに基づき露光装置60から射出された光束を照射して感光体3上に静電潜像を形成する。その後、現像ローラ4によりトナーを付着させ静電潜像を可視像化することで感光体3上にトナー画像を形成する。一方、給紙ローラ12は、給紙カセット11から記録媒体である用紙P(不図示)を1枚ずつ分離して搬送してレジストローラ14に突き当てて止める。   In the process cartridge 2 of the present embodiment, the surface of the photosensitive member 3 is first uniformly charged by the charging roller 6 as the photosensitive member 3 rotates. Next, an electrostatic latent image is formed on the photoreceptor 3 by irradiating the light beam emitted from the exposure device 60 based on the image data. Thereafter, a toner image is formed on the photosensitive member 3 by attaching the toner with the developing roller 4 to visualize the electrostatic latent image. On the other hand, the paper feed roller 12 separates the paper P (not shown), which is a recording medium, from the paper feed cassette 11 one by one, conveys it, and abuts against the registration roller 14 to stop.

そして、プロセスカートリッジ2のトナー画像形成のタイミングに合わせて、レジストローラ14に突き当てて止めた用紙Pを感光体3と転写ローラ70とが対向する転写部に送り出す。転写部では、感光体3上のトナー画像が供給された用紙Pに転写される。トナー画像が転写された用紙Pは、定着装置80によりトナー画像を定着後、排紙ローラ対15により機外に排出される。一方、トナー画像転写後の感光体3の表面は、クリーニングブレード5により残留トナーが除去清掃され、次の露光装置60による静電潜像の形成に備える。
そして、本実施形態のプリンタ100では、次の露光装置60による静電潜像の形成に先立ち、帯電ローラ6で感光体3を一様帯電した後、感光体3上における感光体軸方向の用紙Pの最大用紙幅の端部近傍に付着した付着物を付着物除去機構30で除去する。
Then, in accordance with the toner image formation timing of the process cartridge 2, the paper P that is abutted against the registration roller 14 and stopped is sent to a transfer portion where the photoconductor 3 and the transfer roller 70 face each other. In the transfer portion, the toner image on the photoreceptor 3 is transferred to the supplied paper P. The paper P onto which the toner image has been transferred is fixed to the toner image by the fixing device 80 and then discharged out of the apparatus by the paper discharge roller pair 15. On the other hand, the surface of the photoreceptor 3 after the toner image transfer is cleaned by removing residual toner by the cleaning blade 5, and prepares for the formation of an electrostatic latent image by the next exposure device 60.
In the printer 100 of the present embodiment, the photosensitive member 3 is uniformly charged by the charging roller 6 prior to the formation of the electrostatic latent image by the next exposure device 60, and then the paper in the photosensitive member axial direction on the photosensitive member 3. The adhering matter adhering to the vicinity of the end of the maximum paper width of P is removed by the adhering matter removing mechanism 30.

次に、本実施形態のプリンタ100のプロセスカートリッジ2に備えた、付着物除去機構30について、複数の実施例を挙げて詳しく説明する前に、本発明の課題を明確にするため、従来のプロセスカートリッジ(作像部)の構成について説明する。また、各実施例の付着物除去機構30を備えたプロセスカートリッジ2、及び従来のプロセスカートリッジの構成については、特に区別する必要がない限り、同一の構成部材や同様な機能を有した構成部材については、同一の符号を付して説明する。   Next, in order to clarify the problem of the present invention, the deposit removal mechanism 30 provided in the process cartridge 2 of the printer 100 of the present embodiment will be described in detail with reference to a plurality of examples. The configuration of the cartridge (image forming unit) will be described. In addition, as for the configuration of the process cartridge 2 provided with the deposit removing mechanism 30 of each embodiment and the conventional process cartridge, unless there is a particular need to distinguish, the same configuration member or a configuration member having a similar function Are described with the same reference numerals.

(従来例)
従来のプロセスカートリッジの構成の一例である従来例について、図を用いて説明する。
図3は、従来のプロセスカートリッジの主要な構成を説明する断面説明図である。図4は、従来の感光体軸方向の寸法関係、及び問題点についての説明図である。そして、図4(a)が最大画像領域幅:L1よりも最大露光幅:L2を少しだけ広くした本従来例の説明図、図4(b)が最大用紙幅:L3の端部近傍を跨ぐような清掃電位部を形成できる広さに最大露光幅:L2’をした場合の説明図である。
(Conventional example)
A conventional example which is an example of a configuration of a conventional process cartridge will be described with reference to the drawings.
FIG. 3 is an explanatory cross-sectional view illustrating the main configuration of a conventional process cartridge. FIG. 4 is a diagram for explaining a conventional dimensional relationship in the axial direction of the photosensitive member and problems. 4A is an explanatory view of the conventional example in which the maximum exposure width L2 is slightly wider than the maximum image area width L1, and FIG. 4B straddles the vicinity of the end of the maximum sheet width L3. It is explanatory drawing at the time of carrying out maximum exposure width | variety: L2 'in the area which can form such a cleaning potential part.

本従来例のプロセスカートリッジも、図3に示すように、上記した本実施形態のプロセスカートリッジと同様に、感光体3の回転方向に対し順に、帯電ローラ6、露光装置60、現像ローラ4、クリーニングブレード5などが配置された作像部を構成している。また、露光装置60には、図4(a)に示すようにレンズアレイ62及び発光基板(不図示)と、これらを保持するヘッドフレーム63とで構成されている光書込ヘッド61が用いられている。そして、感光体3と光書込ヘッド61との間には、両者の距離を規制する規制部材であるスペーサ部材21(a,b)が、感光体3の長手方向に2箇所設けられており、感光体3と光書込ヘッド61の間隔を決める役目と果たしている。   As shown in FIG. 3, the process cartridge of this conventional example also has the charging roller 6, the exposure device 60, the developing roller 4, and the cleaning in order with respect to the rotation direction of the photosensitive member 3, as in the process cartridge of the present embodiment described above. An image forming unit in which the blade 5 and the like are arranged is configured. Further, as shown in FIG. 4A, an optical writing head 61 composed of a lens array 62, a light emitting substrate (not shown), and a head frame 63 that holds them is used for the exposure device 60. ing. Between the photosensitive member 3 and the optical writing head 61, two spacer members 21 (a, b), which are regulating members for regulating the distance between the two, are provided in the longitudinal direction of the photosensitive member 3. It plays the role of determining the distance between the photosensitive member 3 and the optical writing head 61.

このスペーサ部材21(a,b)は、光書込ヘッド61に接触するヘッド接触面211と感光体3に接触する感光体接触面212と有している。そして、スペーサ部材21(a,b)のヘッド接触面211はレンズアレイ62の長手方向外側のヘッドフレーム63に接触するよう配置されている。
しかし、図2を用いて説明した本実施形態のプロセスカートリッジ2とは異なり、クリーニングブレード5の他には、感光体3上の残留トナー等を除去清掃する部材は設けていない。
The spacer member 21 (a, b) has a head contact surface 211 that contacts the optical writing head 61 and a photoreceptor contact surface 212 that contacts the photoreceptor 3. The head contact surface 211 of the spacer member 21 (a, b) is disposed so as to contact the head frame 63 on the outer side in the longitudinal direction of the lens array 62.
However, unlike the process cartridge 2 of the present embodiment described with reference to FIG. 2, in addition to the cleaning blade 5, there is no member for removing and cleaning residual toner and the like on the photoreceptor 3.

本従来例のプロセスカートリッジは、図4(a)に示すように感光体3上の付着物は、最大画像領域幅:L1よりも少しだけ広い最大露光幅:L2内で発生するものは、清掃用トナーを用いて除去することが可能である。すなわち、画像形成を行う画像形成領域と次の画像形成領域との間に清掃用トナーを付着させ感光体クリーニング装置に供給し、付着した清掃用トナーの研磨効果を利用してクリーニングブレード5によって付着物をかき取りることが可能である。
しかし、本従来例の露光方式が画像部露光であるため、最大露光幅:L2の外側は清掃用トナーを感光体3上に付着させることができず、最大露光幅:L2より外側の感光体3上の付着物を清掃用トナーを用いて除去することはできない。
In the process cartridge of this conventional example, as shown in FIG. 4A, the deposit on the photoconductor 3 occurs within the maximum exposure width: L2 slightly wider than the maximum image area width: L1. It is possible to remove it using a toner. That is, a cleaning toner is attached between an image forming area where image formation is performed and the next image forming area and is supplied to the photoconductor cleaning device, and is attached by the cleaning blade 5 using the polishing effect of the attached cleaning toner. Kimono can be scraped off.
However, since the exposure method of the conventional example is image portion exposure, the cleaning toner cannot be deposited on the photoreceptor 3 outside the maximum exposure width: L2, and the photoreceptor outside the maximum exposure width: L2. The deposit on 3 cannot be removed using cleaning toner.

特に、感光体3上における感光体軸方向の用紙Pの最大用紙幅の端部近傍、つまり、通紙可能な最大媒体領域幅である最大用紙幅:L3の端部近傍ではタルク成分等が感光体3上に付着し易い。この最大用紙幅:L3の端部近傍に付着したタルク成分等は、残留トナーを除去する感光体クリーニング装置に設けたクリーニングブレード5だけでは完全に除去することが困難な付着物となる。この感光体3上の付着物が原因でクリーニングブレード5のエッジがダメージを受け、残留トナーをクリーニングできないクリーニング不良が発生し、用紙Pの感光体軸方向の端部付近に縦スジやトナー落ちという画像不良が発生する。   In particular, in the vicinity of the end of the maximum sheet width of the sheet P in the photosensitive member axial direction on the photosensitive member 3, that is, in the vicinity of the end of the maximum sheet width: L3 that is the maximum medium area width that can be passed, the talc component and the like are exposed. It is easy to adhere on the body 3. The talc component adhering to the vicinity of the end portion of the maximum sheet width L3 becomes an adhering matter that is difficult to remove completely only by the cleaning blade 5 provided in the photoconductor cleaning device for removing the residual toner. The edge of the cleaning blade 5 is damaged due to the adhering matter on the photoconductor 3, and a cleaning failure that cannot clean the residual toner occurs, and vertical streaks or toner drops near the end of the paper P in the photoconductor axis direction. An image defect occurs.

上記不具合の発生を抑制するためには、図4(a)に示す露光装置60に用いている光書込ヘッド61による感光体3の最大露光幅:L2を、図4(b)に示す用紙端部近傍を跨ぐような清掃電位部を形成できる最大露光幅:L2’に広げる必要がある。
しかし、図4(b)に示すように広げると、露光装置60の幅が広くなってしまい、装置本体内の各装置や構成部材の集約度を高めているプリンタ100が大型化するおそれがある。また、用紙Pの最大用紙幅:L3の端部近傍を跨ぐような清掃電位部を形成して清掃用トナーを付着させて、用紙Pの最大用紙幅:L3の端部近傍に生じる付着物を除去するため、その分だけトナーの消費量が増えてしまう。
In order to suppress the occurrence of the above problem, the maximum exposure width L2 of the photosensitive member 3 by the optical writing head 61 used in the exposure apparatus 60 shown in FIG. 4A is set to the paper shown in FIG. It is necessary to widen to the maximum exposure width L2 ′ that can form a cleaning potential portion straddling the vicinity of the end portion.
However, when it is widened as shown in FIG. 4B, the width of the exposure device 60 becomes wide, and the printer 100 that increases the degree of aggregation of each device and component in the device main body may increase in size. . Further, the cleaning potential portion is formed so as to straddle the vicinity of the end portion of the maximum sheet width: L3 of the sheet P, and the cleaning toner is attached, so that the adhering matter generated near the end portion of the maximum sheet width: L3 of the sheet P is removed. Since the toner is removed, the amount of toner consumption increases accordingly.

ここで、本従来例では感光体3の感光体軸方向に多少余裕を持たせているため、感光体軸方向の長さに変化はないが、露光装置60だけでなく、クリーニングブレード5の幅もクリーニングブレード幅:L5’に広くなっている。これは、最大露光幅:L2’に広げることにより、スペーサ部材21(a,b)の配置位置が外側に移動し、端部でトナーがこぼれ易いクリーニングブレード5の端部位置を、スペーサ部材21(a,b)を避けた外側の位置にしているためである。   Here, in this conventional example, since there is some margin in the photosensitive member axial direction of the photosensitive member 3, there is no change in the length in the photosensitive member axial direction, but not only the exposure device 60 but also the width of the cleaning blade 5. Also, the cleaning blade width is increased to L5 ′. This is because the position of the spacer member 21 (a, b) is moved outward by widening to the maximum exposure width: L2 ′, and the end position of the cleaning blade 5 where the toner easily spills at the end is set to the spacer member 21. This is because (a, b) is outside the position.

なお、本従来例では、露光方式が画像部露光であるものついて説明したが、露光方式が背景部露光でも、同様な問題が生じる。
背景部露光では、トナーを付着させる電位部を帯電ローラ6による感光体3の帯電により形成している。このため、帯電ローラ6による感光体3の帯電幅を、感光体3の最大画像領域幅:L1よりも広い、最大用紙幅:L3の端部近傍を跨ぐような清掃電位部を形成できる幅(L2’)まで広くせざるを得ない。このように露光装置60の幅が広くなってしまい、装置本体内の各装置や構成部材の集約度を高めているプリンタ100が大型化するおそれがある。
また、最大用紙幅:L3の端部近傍を跨ぐような清掃電位部を形成して清掃用トナーを付着させて、用紙端部近傍に生じる付着物を除去するため、その分だけトナーの消費量が増えてしまう。
In the conventional example, the exposure method is the image portion exposure, but the same problem occurs even when the exposure method is the background portion exposure.
In the background portion exposure, the potential portion to which the toner is attached is formed by charging the photoreceptor 3 by the charging roller 6. For this reason, the charging width of the photosensitive member 3 by the charging roller 6 is larger than the maximum image region width L1 of the photosensitive member 3 and a width that can form a cleaning potential portion that straddles the vicinity of the end of the maximum paper width L3 ( L2 ') must be widened. Thus, the width of the exposure apparatus 60 becomes wide, and the printer 100 that increases the degree of aggregation of each apparatus and component in the apparatus main body may be increased in size.
Further, a cleaning potential portion is formed so as to straddle the vicinity of the end of the maximum sheet width: L3, and the cleaning toner is attached to remove the adhering matter generated in the vicinity of the end of the sheet. Will increase.

(実施例1)
本実施形態のプリンタ100のプロセスカートリッジ2に備えた付着物除去機構30の実施例1について、図を用いて説明する。
図5は、本実施例の感光体軸方向の寸法関係についての説明図である。
ここで、図3及び図4(a)を用いて説明した従来例のプロセスカートリッジと、本実施例のプロセスカートリッジ2とでは、本実施例のプロセスカートリッジ2に付着物除去機構30を備えたことに係る点のみ異なる。したがって、上記した従来例と同様な構成、及びその作用・効果については、適宜、省略して説明する。また、同一の構成部材、又は同様な機能を果す構成部材については、特に区別する必要がない限り、同一の符号を付して説明する。
Example 1
Example 1 of the deposit removing mechanism 30 provided in the process cartridge 2 of the printer 100 of this embodiment will be described with reference to the drawings.
FIG. 5 is an explanatory diagram of the dimensional relationship in the photosensitive member axial direction according to this embodiment.
Here, in the process cartridge of the conventional example described with reference to FIGS. 3 and 4A and the process cartridge 2 of the present embodiment, the process cartridge 2 of the present embodiment is provided with the deposit removing mechanism 30. Only the points related to. Therefore, the configuration similar to that of the above-described conventional example, and its operation and effect will be omitted as appropriate. Further, the same constituent members or constituent members performing the same function will be described with the same reference numerals unless particularly distinguished.

本実施例では、図2を用いて説明したように従来例とは異なり、スペーサ部材21(a,b)と帯電ローラ6との間に付着物除去機構30に備えた付着物除去部材31(a,b)と付勢バネ32(a,b)と、各スペーサ部材21の支持部材とが配置されている。また、付着物除去部材31(a,b)は、付勢バネ32(a,b)による感光体3に向けた付着方向に移動可能に支持部材により支持されている。
そして、図2及び図5に示すように、付着物除去機構30の付着物除去部材31(a,b)は、最大用紙幅:L3よりも広い清掃領域であるクリーニングブレード幅:L5を有するクリーニング部材であるクリーニングブレード5とは別に設けられている。また、本実施例の付着物除去機構30に設けた付着物除去部材31(a,b)は、感光体3の回転方向上流側の辺が、感光体軸方向に平行に構成されている。
In this embodiment, as described with reference to FIG. 2, unlike the conventional example, the deposit removing member 31 (provided in the deposit removing mechanism 30 between the spacer member 21 (a, b) and the charging roller 6). a, b), urging springs 32 (a, b), and support members for the spacer members 21 are arranged. Further, the deposit removal member 31 (a, b) is supported by a support member so as to be movable in the direction of attachment toward the photoreceptor 3 by the biasing spring 32 (a, b).
As shown in FIGS. 2 and 5, the deposit removing member 31 (a, b) of the deposit removing mechanism 30 has a cleaning blade width: L5 which is a cleaning region wider than the maximum sheet width: L3. It is provided separately from the cleaning blade 5 which is a member. Further, the deposit removing member 31 (a, b) provided in the deposit removing mechanism 30 of the present embodiment is configured such that the upstream side in the rotation direction of the photosensitive member 3 is parallel to the photosensitive member axial direction.

そして、付着物除去部材31(a,b)の感光体軸方向の外側端部は、感光体軸方向の最大露光幅:L2よりも広い用紙Pの最大領域幅である最大用紙幅:L3の外側まで接触するように設けられている。一方、内側端部は、最大露光幅:L2よりも少しだけ狭い最大画像領域幅:L1の内側まで接触するように設けられている。すなわち、特許文献2に記載の構成と異なり、クリーニングブレード5とは別に設けた付着物除去部材31(a,b)が、最大画像領域幅:L1、つまり感光体3上における用紙Pの最大領域幅の内側から、外側にわたって接触する。
したがって、清掃用トナーを付着させることができない最大露光幅:L2よりも広い最大用紙幅:L3の端部近傍を、クリーニングブレード5と付着物除去部材31(a,b)とで2度除去動作を行うことで、感光体3上に生じる付着物も除去することができる。すなわち、感光体3上における用紙Pの最大領域幅の端部近傍で生じる感光体3上の付着物を除去する動作を、クリーニングブレード5と付着物除去部材31(a,b)とで2度行ってタルク成分等の付着物も除去できる。
The outer end of the adhering material removing member 31 (a, b) in the photosensitive member axial direction has a maximum sheet width: L3 which is a maximum region width of the sheet P wider than the maximum exposure width: L2 in the photosensitive member axis direction. It is provided so that it may contact outside. On the other hand, the inner end portion is provided so as to come into contact with the inside of the maximum image area width L1: slightly narrower than the maximum exposure width L2. That is, unlike the configuration described in Patent Document 2, the deposit removing member 31 (a, b) provided separately from the cleaning blade 5 has a maximum image area width: L1, that is, the maximum area of the paper P on the photoreceptor 3. Contact from the inside to the outside of the width.
Accordingly, the cleaning blade 5 and the adhering matter removing member 31 (a, b) remove twice the vicinity of the end of the maximum paper width: L3, which is larger than the maximum exposure width: L2 to which the cleaning toner cannot be attached. By performing the above, deposits generated on the photoreceptor 3 can also be removed. That is, the operation of removing the deposit on the photosensitive member 3 that occurs near the edge of the maximum area width of the paper P on the photosensitive member 3 is performed twice by the cleaning blade 5 and the deposit removing member 31 (a, b). It is possible to remove deposits such as talc components.

上記のように除去できるので、特許文献1に記載の構成のように感光体3上における露光装置60による最大露光幅:L2’を用紙Pの最大画像領域幅:L1よりも広くして清掃電位部を形成する必要がない。
よって、プリンタ100の大型化を抑制しつつ、感光体3上における用紙Pの最大用紙幅:L3の端部近傍で生じる付着物も除去可能な付着物除去機構30を提供できる。
また、感光体3上における最大用紙幅:L3の用紙端部近傍に生じる付着物が原因でクリーニングブレード5のエッジがダメージを受け、残留トナーをクリーニングできないクリーニング不良が発生することを抑制できる。
よって、用紙余白部の縦スジやトナー落ちという画像不良が発生するという問題を回避することができる。
また、最大用紙幅:L3の端部近傍に生じる付着物を除去するのに清掃用トナーを用いていないので、その分だけトナーの消費量の増加を抑制できる。
Since it can be removed as described above, the cleaning potential is set so that the maximum exposure width L2 ′ by the exposure device 60 on the photosensitive member 3 is wider than the maximum image area width L1 of the paper P as in the configuration described in Patent Document 1. There is no need to form a part.
Accordingly, it is possible to provide the deposit removing mechanism 30 that can also remove deposits generated near the end of the maximum sheet width: L3 of the sheet P on the photosensitive member 3 while suppressing an increase in the size of the printer 100.
In addition, it is possible to suppress the occurrence of a cleaning failure in which the edge of the cleaning blade 5 is damaged due to the adhering matter generated in the vicinity of the end of the sheet having the maximum sheet width L3 on the photosensitive member 3 and the residual toner cannot be cleaned.
Therefore, it is possible to avoid the problem that image defects such as vertical stripes at the paper margin and toner drop occur.
Further, since the cleaning toner is not used to remove the adhering matter generated in the vicinity of the end portion of the maximum sheet width L3, an increase in toner consumption can be suppressed by that amount.

また、本実施例では、付着物除去部材31(a,b)の感光体3との当接面を、感光体3の曲率と略同じか若干小さい曲率の曲面とし、付着物除去部材31(a,b)の弾性変形を利用して感光体3との密着性を高めている。このように密着性を高めることで、付着物除去部材31(a,b)による付着物の除去作用を高めるとともに、付着物除去部材31(a,b)と感光体3との間に感光体軸方向等から残留トナー等が侵入して新たな付着物が生じることを防いでいる。
ここで、付着物除去部材31(a,b)には感光体3が当接して摺動するので、感光体3の摩耗を少なくするため、付着物除去部材31の材質としては、ポリアセタール(POM)のような摺動性のある樹脂が好ましい。このように付着物除去部材31(a,b)の材質をポリアセタールにすることで、摺動する感光体3の磨耗を少なくでき、感光体3の寿命を長くできるとともに、付着物や残留トナー等の除去作用も高めることができる。
In this embodiment, the contact surface of the deposit removing member 31 (a, b) with the photosensitive member 3 is a curved surface having a curvature substantially the same as or slightly smaller than the curvature of the photosensitive member 3, and the deposit removing member 31 ( Adhesion with the photosensitive member 3 is enhanced by utilizing the elastic deformation of a and b). By increasing the adhesion as described above, the action of removing the deposit by the deposit removing member 31 (a, b) is enhanced, and the photoreceptor between the deposit removing member 31 (a, b) and the photoreceptor 3 is increased. Residual toner or the like enters from the axial direction or the like to prevent new deposits from being generated.
Here, since the photosensitive member 3 contacts and slides on the deposit removing member 31 (a, b), the material for the deposit removing member 31 is polyacetal (POM) in order to reduce wear of the photosensitive member 3. A slidable resin such as In this way, by using polyacetal as the material of the deposit removing member 31 (a, b), the wear of the sliding photoreceptor 3 can be reduced, the life of the photoreceptor 3 can be extended, and the deposit, residual toner, etc. The removal action of can also be enhanced.

(実施例2)
本実施形態のプリンタ100のプロセスカートリッジ2に備えた付着物除去機構30の実施例2について、図を用いて説明する。
図6は、付着物除去部材31(a,b)の感光体回転方向上流側の辺が、感光体軸方向に平行な付着物除去機構を設けることにより生じる問題点の説明図である。そして、図6(a)が感光体3の回転にともない付着物除去部材31(a,b)の感光体回転方向上流側の辺に堆積する除去した付着物の説明図、図6(b)が感光体3上の最大画像領域側へこぼれる堆積した付着物の説明図である。また、図6(c)が感光体3上の最大画像領域に再度付着する、こぼれた付着物の説明図、図6(d)が再付着した付着物が基点となり、大きくなる付着物の説明図である。
(Example 2)
Example 2 of the deposit removing mechanism 30 provided in the process cartridge 2 of the printer 100 of this embodiment will be described with reference to the drawings.
FIG. 6 is an explanatory view of a problem caused by providing the deposit removing mechanism in which the upstream side of the deposit removing member 31 (a, b) is parallel to the photosensitive member axial direction. FIG. 6A is an explanatory diagram of the removed deposits accumulated on the upstream side in the photosensitive member rotation direction of the deposit removing member 31 (a, b) as the photosensitive member 3 rotates, and FIG. 6B. FIG. 4 is an explanatory diagram of accumulated deposits that spill to the maximum image area side on the photoreceptor 3. FIG. 6C is an explanatory diagram of spilled deposits that adhere again to the maximum image area on the photosensitive member 3, and FIG. FIG.

図7は、本実施例に係る付着物除去機構30の説明図であり、図7(a)が上方から見た説明図、図7(b)が正面側から見た説明図である。図8は、付着物除去部材31(a,b)の感光体回転方向上流側の辺が、感光体軸方向に対して傾斜を有した付着物除去機構30を設けた構成に残る課題の説明図である。そして、図8(a)が感光体3上の最大画像領域側へこぼれるかき取った付着物の説明図、図8(b)が感光体3上に再度付着するこぼれた付着物の説明図である。   FIG. 7 is an explanatory diagram of the deposit removal mechanism 30 according to the present embodiment, in which FIG. 7A is an explanatory diagram viewed from above, and FIG. 7B is an explanatory diagram viewed from the front side. FIG. 8 illustrates the problem that remains in the configuration in which the deposit removing mechanism 30 in which the upstream side of the deposit removing member 31 (a, b) is inclined with respect to the photosensitive member axial direction is provided. FIG. FIG. 8A is an explanatory diagram of the deposit that has been scraped off to the maximum image area side on the photoconductor 3, and FIG. 8B is an explanatory diagram of the deposit that has been deposited on the photoconductor 3 again. is there.

本実施例の付着物除去機構30は、上記した実施例1の付着物除去機構と、付着物除去部材31(a,b)の形状に係る点のみ異なる。したがって、上記した実施例1、及び従来例と同様な構成、及びその作用・効果については、適宜、省略して説明する。また、同一の構成部材、又は同様な機能を果す構成部材については、特に区別する必要がない限り、同一の符号を付して説明する。   The deposit removing mechanism 30 of the present embodiment is different from the deposit removing mechanism of the first embodiment described above only in the point relating to the shape of the deposit removing member 31 (a, b). Therefore, the configuration similar to that of the first embodiment and the conventional example, and the operation and effect thereof will be omitted as appropriate. Further, the same constituent members or constituent members performing the same function will be described with the same reference numerals unless particularly distinguished.

まず、図6を用いて、上記した実施例1のように、付着物除去部材31(a,b)の感光体回転方向上流側の辺が、感光体軸方向に平行な付着物除去機構を設けた場合の問題点について説明する。
感光体3の回転にともない付着物除去部材31(a,b)の感光体回転方向上流側の辺には、図6(a)に示すように、除去した付着物が堆積する。この堆積した付着物は、あるタイミングで振動等の影響により、図6(b)に示すように、最大画像領域側へこぼれる。こぼれた付着物の一部は、図6には図示していない現像ローラ4やクリーニングブレード5によって感光体3に押し付けられ、図6(c)に示すように、感光体3上に再度付着してしまう。そして、再付着した付着物が起点となり、図6(d)に示すように、この付着物の上に残留トナー等がさらに付着してしまうため付着物が大きくなってしまい、最終的に画像不良を引き起こす場合がある。
First, referring to FIG. 6, as in the above-described first embodiment, the deposit removing mechanism in which the upstream side of the deposit removing member 31 (a, b) is parallel to the photoreceptor axial direction is used. The problem with the provision will be described.
As shown in FIG. 6A, the removed deposits accumulate on the upstream side of the adhering matter removing member 31 (a, b) in the rotating direction of the photoconductor as the photoconductor 3 rotates. The accumulated deposits spill out toward the maximum image area as shown in FIG. 6B due to the influence of vibration or the like at a certain timing. Some of the spilled deposits are pressed against the photoreceptor 3 by the developing roller 4 and the cleaning blade 5 (not shown in FIG. 6), and again adhere to the photoreceptor 3 as shown in FIG. 6 (c). End up. As shown in FIG. 6 (d), the reattached adhered matter becomes the starting point, and as a result, residual toner or the like further adheres on the adhered matter, resulting in an increased adhered matter, and finally an image defect. May cause.

そこで、本実施例の付着物除去機構30では、図7(a)、(b)に示すように、付着物除去部材31(a,b)を、感光体3の回転方向(移動方向)に対して傾斜を有し、傾斜の方向が内側から外側に広がるように構成することとした。すなわち、付着物除去部材31(a,b)の感光体3との接触面には、感光体3の回転方向上流から下流に向かって、感光体軸方向(幅方向)の外側に広がるような傾斜部分(辺)を有するように構成した。なお、本実施例では、平板状部材に感光体3と嵌め合う円弧状の切欠き部を形成した付着物除去部材31(a,b)自体を傾斜させ、付着物除去部材31の感光体3との接触面に、感光体3の回転方向(移動方向)に対して傾斜部分を有するように構成している。   Therefore, in the deposit removing mechanism 30 of the present embodiment, the deposit removing member 31 (a, b) is moved in the rotation direction (moving direction) of the photoreceptor 3 as shown in FIGS. On the other hand, it is configured to have an inclination and the direction of the inclination extends from the inside to the outside. That is, the adhering matter removing member 31 (a, b) contacts the surface of the photoreceptor 3 so as to spread outward in the photoreceptor axial direction (width direction) from the upstream to the downstream in the rotational direction of the photoreceptor 3. It comprised so that it might have an inclined part (side). In this embodiment, the deposit removing member 31 (a, b) itself in which an arc-shaped notch that fits with the photoreceptor 3 is formed on a flat plate member is tilted, and the photoreceptor 3 of the deposit removing member 31 is tilted. The contact surface is inclined with respect to the rotation direction (movement direction) of the photosensitive member 3.

この傾斜部分により、付着物除去部材31で感光体3上から除去した(かき取った)付着物の大半を感光体軸方向外側の最大用紙幅:L3の外に押し出すことができ、付着物除去部材31(a,b)の感光体回転方向上流側に除去した付着物が堆積することを防げる。
したがって、除去した付着物が、感光体3上に再付着する機会を大幅に減らすことが可能となり、除去した付着物の再付着に起因した画像不良の発生を抑制できる。
By this inclined portion, most of the deposit removed (scraped) from the photoreceptor 3 by the deposit removing member 31 can be pushed out of the maximum sheet width L3 outside the photoreceptor axis direction, and the deposit removed. It is possible to prevent the removed deposits from accumulating on the upstream side of the member 31 (a, b) in the photosensitive member rotation direction.
Therefore, it is possible to greatly reduce the chance that the removed deposits are reattached on the photoconductor 3, and the occurrence of image defects due to the reattachment of the removed deposits can be suppressed.

しかし、図8(a)に示すように、感光体3の回転にともなって、付着物除去部材31(a,b)の感光体軸方向内側の端部付近で除去した付着物の一部が感光体軸方向内側に入り込んでしまうことがある。このため、図6(d)を用いて説明した付着物に比べて、その量は少ないものの、図8(b)に示すように付着物除去部材31の感光体軸方向内側の端部付近の感光体3上にこぼれた付着物が、再付着し易いという問題がある。
そこで、本実施例の付着物除去機構30では、付着物除去部材31(a,b)の感光体軸方向内側の端部を、図7(a)、(b)に示すように最大露光幅:L2よりも少しだけ狭い最大画像領域幅:L1より内側に設けている。このように、付着物除去部材31(a,b)を設けることで、除去した付着物が確実に最大露光幅:L2内に落ちるようにしている。
このように落とすことで、感光体3表面を清掃する清掃用トナーを感光体3表面に付着させて感光体クリーニング装置に供給し、感光体3表面に付着した清掃用トナーの研磨効果を利用してクリーニングブレード5で付着物を除去することが可能となる。
However, as shown in FIG. 8A, as the photoconductor 3 rotates, a part of the deposit removed near the inner end of the deposit removing member 31 (a, b) in the axial direction of the photoconductor. There is a case where it enters inside the photoconductor axis. For this reason, although the amount is smaller than that of the deposit described with reference to FIG. 6D, as shown in FIG. There is a problem that the deposits spilled on the photosensitive member 3 are easily reattached.
Therefore, in the deposit removing mechanism 30 according to the present embodiment, the maximum exposure width as shown in FIGS. : Maximum image area width slightly narrower than L2: Provided inside L1. Thus, by providing the deposit removal member 31 (a, b), the removed deposit is surely dropped within the maximum exposure width L2.
By dropping in this way, cleaning toner for cleaning the surface of the photoconductor 3 is attached to the surface of the photoconductor 3 and supplied to the photoconductor cleaning device, and the polishing effect of the cleaning toner attached to the surface of the photoconductor 3 is used. Thus, it is possible to remove the deposits with the cleaning blade 5.

具体的には、上記した付着物除去機構30に、次のような機能(制御)を付加する。用紙Pへ転写するトナー像の形成を行っていない時に、感光体3、現像装置、露光装置60を駆動して、最大画像領域幅:L1内の感光体3上に清掃電位部を形成し、現像装置の現像ローラ4から感光体3の表面を清掃するための清掃用トナーを付着させる。そして、感光体3の回転により、感光体クリーニング装置に清掃用トナーを供給し、清掃用トナーの研磨効果を利用してクリーニングブレード5で付着物を除去する。すなわち、用紙Pへ転写するトナー像の形成を行っていない時に、感光体3表面を清掃するための清掃用トナーを供給し、クリーニングブレード5を有した感光体クリーニング装置で最大画像領域幅内の付着物を除去する。
このような機能を付着物除去機構30に付加することで、付着物除去部材31(a,b)によって除去した付着物が、感光体3上の最大画像領域幅:L1内で再付着して大きくなってしまい、最終的に画像不良を引き起こすことを防止できる。
Specifically, the following function (control) is added to the above-described deposit removing mechanism 30. When the toner image to be transferred to the paper P is not formed, the photosensitive member 3, the developing device, and the exposure device 60 are driven to form a cleaning potential portion on the photosensitive member 3 within the maximum image area width: L1, Cleaning toner for cleaning the surface of the photoreceptor 3 is attached from the developing roller 4 of the developing device. Then, the toner for cleaning is supplied to the photoconductor cleaning device by the rotation of the photoconductor 3, and the adhered matter is removed by the cleaning blade 5 using the polishing effect of the toner for cleaning. That is, when the toner image to be transferred to the paper P is not formed, cleaning toner for cleaning the surface of the photoconductor 3 is supplied, and the photoconductor cleaning device having the cleaning blade 5 has a maximum image area width. Remove deposits.
By adding such a function to the deposit removing mechanism 30, the deposit removed by the deposit removing member 31 (a, b) is reattached within the maximum image area width L1 on the photoreceptor 3. It is possible to prevent the image from becoming large and finally causing image defects.

(実施例3)
本実施形態のプリンタ100のプロセスカートリッジ2に備えた付着物除去機構30の実施例3について、図を用いて説明する。
図9は、本実施例に係る付着物除去機構30に有した付着物除去部材31aの説明図である。そして、図9(a)が付着物除去部材31aの斜め上からの斜視説明図、図9(b)が付着物除去部材31aの感光体軸方向内側からの側面説明図、図9(c)が付着物除去部材31aの感光体3側からの底面説明図である。また、図9(d)が付着物除去部材31aの傾斜接触面312aの幅である先端幅:t1、及び傾斜接触面312aを設けたリブ形状部の根元の幅であるリブ幅:t2の斜め下からの斜視説明図である。図10は、本実施例に係る付着物除去部材31(a,b)の傾斜接触面312aの幅である先端幅:t1と付着物除去部材31(a,b)に付与される荷重との関係を説明するグラフである。
Example 3
Example 3 of the deposit removing mechanism 30 provided in the process cartridge 2 of the printer 100 of this embodiment will be described with reference to the drawings.
FIG. 9 is an explanatory diagram of the deposit removing member 31a included in the deposit removing mechanism 30 according to the present embodiment. 9A is a perspective explanatory view from the top of the deposit removing member 31a, FIG. 9B is a side view of the deposit removing member 31a from the inner side in the photoreceptor axial direction, and FIG. 9C. FIG. 6 is a bottom explanatory view from the photosensitive member 3 side of the deposit removing member 31a. Further, FIG. 9D is an oblique view of the tip width: t1 which is the width of the inclined contact surface 312a of the deposit removing member 31a and the rib width: t2 which is the width of the root of the rib-shaped portion provided with the inclined contact surface 312a. It is a perspective explanatory view from the bottom. FIG. 10 shows the tip width: t1 which is the width of the inclined contact surface 312a of the deposit removing member 31 (a, b) according to the present embodiment and the load applied to the deposit removing member 31 (a, b). It is a graph explaining a relationship.

本実施例の付着物除去機構30は、上記した実施例1、2の付着物除去機構と、付着物除去部材31(a,b)の形状に係る点のみ異なる。したがって、上記した実施例1、2及び従来例と同様な構成、及びその作用・効果については、適宜、省略して説明する。また、同一の構成部材、又は同様な機能を果す構成部材については、特に区別する必要がない限り、同一の符号を付して説明する。   The deposit removing mechanism 30 of the present embodiment is different from the deposit removing mechanism of the first and second embodiments described above only in the point relating to the shape of the deposit removing member 31 (a, b). Therefore, the configurations similar to those of the first and second embodiments and the conventional example, and the operation and effect thereof will be omitted as appropriate. Further, the same constituent members or constituent members performing the same function will be described with the same reference numerals unless particularly distinguished.

本実施例の付着物除去機構30に有した付着物除去部材31(a,b)は、上記した実施例1、2の付着物除去部材と異なり、それぞれ2つの接触面を設けている。また、付着物除去部材31(a,b)は、感光体軸方向にほぼ対称な形状をしており、それぞれの構成もほぼ同様であるため、以下の説明では、付着物除去部材31aを例にとって説明する。
図9(a)に示すように、本実施例の付着物除去部材31aは、付勢手段としての、ねじりコイルばね(不図示)を固定する円柱状の座311a、感光体3との傾斜接触面312a、及び平行接触面313aを有している。そして、ねじりコイルばねにより付着物除去部材31aは感光体3方向への荷重を受ける構成となっている。
The deposit removing member 31 (a, b) included in the deposit removing mechanism 30 of the present embodiment is provided with two contact surfaces, unlike the deposit removing member of the first and second embodiments. Further, the deposit removing member 31 (a, b) has a substantially symmetrical shape in the direction of the photosensitive member axis, and the configuration thereof is substantially the same. Therefore, in the following description, the deposit removing member 31a is taken as an example. I will explain to you.
As shown in FIG. 9A, the deposit removing member 31a of this embodiment is a cylindrical seat 311a that fixes a torsion coil spring (not shown) as an urging means, and is inclined in contact with the photoreceptor 3. It has a surface 312a and a parallel contact surface 313a. The deposit removing member 31a is configured to receive a load in the direction of the photoreceptor 3 by a torsion coil spring.

上記した実施例2で、図7(及び図8)を用いて説明した付着物除去部材は、付着物を除去する部分(かき取り部分)の一ヶ所のみが感光体3に当接する形状となっていたが、上記したように本実施例の付着物除去部材31aは2つの接触面を設けている。
具体的には、図9(a)乃至(d)に示すように、実施例2の感光体3の回転方向に対して傾斜を有した板状の付着物除去部材が感光体3と接触する接触面に相当する傾斜接触面312aを有している。そして、傾斜接触面312aとは別に、感光体3と接触する接触面が、感光体3の回転方向に平行な平行接触面313aも有しており、傾斜接触面312aと平行接触面313aとは交わらないように離間して設けられている。
このように2つの接触面を設けることで、付着物除去部材31aの感光体3に対する当接状態を安定させることができるため、付着物除去部材31aの形状としては、感光体3との接触面を2つ設ける形状が好ましい。
In the second embodiment described above, the deposit removing member described with reference to FIG. 7 (and FIG. 8) has a shape in which only one portion (scraping portion) for removing the deposit contacts the photoreceptor 3. However, as described above, the deposit removing member 31a of the present embodiment is provided with two contact surfaces.
Specifically, as shown in FIGS. 9A to 9D, a plate-like deposit removing member having an inclination with respect to the rotation direction of the photoconductor 3 of Example 2 is in contact with the photoconductor 3. An inclined contact surface 312a corresponding to the contact surface is provided. In addition to the inclined contact surface 312a, the contact surface in contact with the photoreceptor 3 also has a parallel contact surface 313a parallel to the rotation direction of the photoreceptor 3, and the inclined contact surface 312a and the parallel contact surface 313a are They are spaced apart so as not to cross each other.
By providing the two contact surfaces in this manner, the contact state of the deposit removing member 31a with the photoreceptor 3 can be stabilized. Therefore, the shape of the deposit removing member 31a is the contact surface with the photoreceptor 3. The shape which provides two is preferable.

そして、傾斜接触面312aと平行接触面313aとは、付着物除去部材31aの座311aを設けた平板状の部分の、座311aを設けた面とは反対側(感光体3側)にそれぞれ形成されたリブ形状部の先端に形成された面である。また、傾斜接触面312aと平行接触面313aを設けた各リブ形状部の他にはリブ形状の部分は設けておらず、図9(c)に符号Gで示すように付着物除去部材31aの傾斜接触面312aと平行接触面313aの各リブ形状部はつなげず、離して配置している。
このように離して配置することで、各リブ形状部がつなげて配置している場合のように、除去した(かき取った)付着物が排出できなくて、付着物除去部材31aの各接触面の間に除去した付着物が溜まってしまうことを回避できるため、離して配置する方が良い。
The inclined contact surface 312a and the parallel contact surface 313a are respectively formed on the opposite side (photosensitive member 3 side) of the flat plate-like portion provided with the seat 311a of the deposit removing member 31a from the surface provided with the seat 311a. It is the surface formed in the front-end | tip of the made rib shape part. Further, in addition to the rib-shaped portions provided with the inclined contact surface 312a and the parallel contact surface 313a, no rib-shaped portion is provided, and as shown in FIG. The rib-shaped portions of the inclined contact surface 312a and the parallel contact surface 313a are not connected and are arranged apart from each other.
By disposing in this way, the removed (scraped) deposits cannot be discharged as in the case where the rib-shaped portions are connected and arranged, and each contact surface of the deposit removing member 31a Since it is possible to avoid accumulation of deposits removed during this period, it is better to place them separately.

また、図9(b)、(c)に示すように、感光体3と接触するリブ形状部に切欠かられた部分の先端の面である傾斜接触面312aの形状は円弧形状で、且つ傾斜を有する形状となっている。そして、上記したように付着物除去部材31aの傾斜部分の接触面でもある傾斜接触面312aは、付着物除去部材31aに設けられたリブ形状部の先端の面であるため、弾性変形し易くなり、感光体3との隙間をなくすことができる。
加えて、図9(c)、(d)に示すように感光体3との傾斜接触面312aの幅である先端幅:t1は、傾斜接触面312aを設けたリブ形状部の根元の幅であるリブ幅:t2よりも細く(小さく)形成されている。このように構成することで、先端幅:t1とリブ幅:t2とが同じ構成のものよりも弾性変形し易くなり、感光体3にさらに当接し易くなるように構成されている。
Further, as shown in FIGS. 9B and 9C, the shape of the inclined contact surface 312a, which is the surface of the tip portion of the rib-shaped portion that comes into contact with the photoreceptor 3, is an arc shape and is inclined. The shape has. As described above, the inclined contact surface 312a, which is also the contact surface of the inclined portion of the deposit removing member 31a, is the surface of the tip of the rib-shaped portion provided on the deposit removing member 31a, and thus is easily elastically deformed. The gap with the photoreceptor 3 can be eliminated.
In addition, as shown in FIGS. 9C and 9D, the tip width t1, which is the width of the inclined contact surface 312a with the photosensitive member 3, is the width of the base of the rib-shaped portion provided with the inclined contact surface 312a. A certain rib width: narrower (smaller) than t2. By being configured in this way, the tip width: t1 and the rib width: t2 are more easily elastically deformed than those having the same configuration, and are more easily contacted with the photoreceptor 3.

ここで、先端幅:t1とねじりコイルばねにより付着物除去部材31aにかける荷重の条件を変化させて、付着物の除去効果と、感光体3及び付着物除去部材31aの耐久性の変化を検証する、発明者らが行った実験結果を図10を用いて説明する。なお、図10に示した実験結果を得た実験は以下のような条件のもとに行った。
<実験条件>
・感光体3の線速:240[mm/s]
・感光体径:φ30[mm]
・押圧方法:座311aを押圧
・傾斜接触面312aの形状:
感光体回転方向(平行接触面313a)に対するリブ形状部の角度:23[°]
感光体軸方向に垂直なリブ形状部が設けられた平面に投影した場合の長さ:12.8[mm]
・平行接触面313aの形状:
感光体軸方向長さ(幅):2.0[mm]
感光体3と接触している部分の円弧の長さ:9.7[mm]
Here, the condition of the load applied to the deposit removing member 31a is changed by the tip width: t1 and the torsion coil spring to verify the deposit removing effect and the change in durability of the photosensitive member 3 and the deposit removing member 31a. The experimental results conducted by the inventors will be described with reference to FIG. The experiment for obtaining the experimental results shown in FIG. 10 was performed under the following conditions.
<Experimental conditions>
-Linear speed of the photosensitive member 3: 240 [mm / s]
-Photoconductor diameter: φ30 [mm]
-Pressing method: pressing the seat 311a-Shape of the inclined contact surface 312a:
Angle of rib-shaped portion with respect to photosensitive member rotation direction (parallel contact surface 313a): 23 [°]
Length when projected onto a plane provided with a rib-shaped portion perpendicular to the photoconductor axis direction: 12.8 [mm]
The shape of the parallel contact surface 313a:
Photoconductor axial length (width): 2.0 [mm]
Arc length of the portion in contact with the photoreceptor 3: 9.7 [mm]

図10に示すように、付着物除去部材31aの先端の幅である先端幅:t1については、小さいほうが付着物除去部材31aは感光体3に当接し易いが、小さくしすぎると部品製作し難くなる。或いは、感光体3上の付着物により、付着物除去部材31a(,b)の傾斜接触面312aを設けたリブ形状部の先端近傍が欠ける等の問題が発生する。このようにリブ形状部の先端近傍が欠けると、欠けた以降、感光体3上の付着物や残留トナー等のすり抜けが発生してしまい好適に付着物や残留トナー等の除去が行えなくなってしまう。
このようなリブ形状部の先端近傍の欠けの発生を抑制するためには、図10に示すように、先端幅:t1を0.1[mm]以上に設定することが望ましい。
As shown in FIG. 10, when the tip width t1, which is the width of the tip of the deposit removing member 31a, is smaller, the deposit removing member 31a is more likely to come into contact with the photoconductor 3, but if it is too small, it is difficult to manufacture parts. Become. Alternatively, the adhering matter on the photosensitive member 3 causes a problem such that the vicinity of the tip of the rib-shaped portion provided with the inclined contact surface 312a of the adhering matter removing member 31a (, b) is missing. If the vicinity of the tip of the rib-shaped portion is chipped in this way, after the chipping, the deposit or residual toner on the photoconductor 3 will slip through, and the deposit or residual toner cannot be removed suitably. .
In order to suppress the occurrence of chipping in the vicinity of the tip of the rib-shaped portion, it is desirable to set the tip width: t1 to 0.1 [mm] or more as shown in FIG.

一方、付着物除去部材31aの傾斜接触面312aの幅である先端幅:t1を、大きくすると部品製作が容易になるが、付着物除去部材31aが感光体3に当接し難くなる。このように、リブ形状部の先端の傾斜接触面312aが感光体3に当接し難くなると、感光体3との間に隙間ができてしまい、感光体3上の付着物や残留トナー等のすり抜けが発生してしまい好適に付着物や残留トナー等の除去が行えなくなってしまう。
このように感光体3との間に隙間が発生を抑制するためには、図10に示すように、先端幅:t1を0.6[mm]以下に設定することが望ましい。
On the other hand, if the tip width t1, which is the width of the inclined contact surface 312a of the deposit removing member 31a, is increased, the manufacture of the components is facilitated, but the deposit removing member 31a is difficult to contact the photoreceptor 3. As described above, when the inclined contact surface 312a at the tip of the rib-shaped portion is difficult to come into contact with the photosensitive member 3, a gap is formed between the rib 3 and the photosensitive member 3. Will occur, and it will be impossible to remove deposits, residual toner and the like.
In order to suppress the occurrence of a gap with the photosensitive member 3 as described above, it is desirable to set the tip width: t1 to 0.6 [mm] or less as shown in FIG.

また、ねじりコイルばねにより付着物除去部材31aにかける荷重については、大きい方が付着物除去部材31aは感光体3に当接し易くなるが、感光体3や付着物除去部材31aが摩耗してしまい、耐久試験後半での耐久性が低下する(磨耗NG)。
このような感光体3や付着物除去部材31aの耐久性の低下を抑制するためには、図10に示すように、ねじりコイルばねにより付着物除去部材31aにかける荷重を8[N]以下に設定することが望ましい。
Further, the larger the load applied to the deposit removing member 31a by the torsion coil spring, the more easily the deposit removing member 31a comes into contact with the photoreceptor 3, but the photoreceptor 3 and the deposit removing member 31a are worn. The durability in the latter half of the durability test is reduced (wear NG).
In order to suppress such a decrease in durability of the photoreceptor 3 and the deposit removing member 31a, as shown in FIG. 10, the load applied to the deposit removing member 31a by the torsion coil spring is set to 8 [N] or less. It is desirable to set.

一方、ねじりコイルばねにより付着物除去部材31aにかける荷重を小さくすると、感光体3や付着物除去部材31aの摩耗を抑制して耐久性を向上させることができるが、付着物除去部材31aが感光体3に当接し難くなる。このように、リブ形状部の先端の傾斜接触面312aが感光体3に当接し難くなると、感光体3との間に隙間ができてしまい、感光体3上の付着物や残留トナー等のすり抜けが発生してしまい好適に付着物や残留トナー等の除去が行えなくなってしまう。
上記のような感光体3との間に隙間が発生を抑制するためには、図10に示すように、ねじりコイルばねにより付着物除去部材31aにかける荷重を3[N]以上に設定することが望ましい。
On the other hand, if the load applied to the deposit removing member 31a by the torsion coil spring is reduced, the durability of the photoreceptor 3 and the deposit removing member 31a can be suppressed and the durability can be improved. It becomes difficult to contact the body 3. As described above, when the inclined contact surface 312a at the tip of the rib-shaped portion is difficult to come into contact with the photosensitive member 3, a gap is formed between the rib 3 and the photosensitive member 3. Will occur, and it will be impossible to remove deposits, residual toner and the like.
In order to suppress the occurrence of a gap between the photosensitive member 3 as described above, the load applied to the deposit removing member 31a by the torsion coil spring is set to 3 [N] or more as shown in FIG. Is desirable.

以上の結果により、本実施例の構成においては付着物除去部材31aの先端の先端幅:t1は0.1[mm]〜0.6[mm]の範囲、ねじりコイルばねにより付着物除去部材31aにかける荷重は3[N]〜8[N]の範囲に設定することが望ましいといえる。
すなわち、傾斜部分の傾斜に垂直な面の幅である、付着物除去部材31aのリブ形状部の先端に形成された傾斜接触面312aの先端幅:t1を0.1[mm]〜0.6[mm]の範囲に設定することで、次のような効果を奏することができる。感光体3表面に付着した付着物による付着物除去部材31aに形成された傾斜接触面312aの欠けや、傾斜接触面312aと感光体3との当接不足により生じた隙間から、付着物や残留トナーのすり抜けの発生を抑制できる。
また、付勢部材であるねじりコイルばねにより付着物除去部材31aにかける荷重を3[N]〜8[N]の範囲に設定することで、次のような効果を奏することができる。感光体3や付着物除去部材31aの磨耗による耐久性の低下や、付着物除去部材31aに形成された傾斜接触面312aと感光体3との当接不足による付着物や残留トナー等のすり抜けの発生を抑制できる。
From the above results, in the configuration of the present embodiment, the tip width of the tip of the deposit removing member 31a: t1 is in the range of 0.1 [mm] to 0.6 [mm], and the deposit removing member 31a is provided by the torsion coil spring. It can be said that it is desirable to set the load applied to 3 [N] to 8 [N].
That is, the tip width of the inclined contact surface 312a formed at the tip of the rib-shaped portion of the deposit removing member 31a, which is the width of the surface perpendicular to the inclination of the inclined portion: t1 is 0.1 [mm] to 0.6. By setting in the range of [mm], the following effects can be obtained. Adherents and residues remain from the gaps caused by the contact between the inclined contact surface 312a and the photoconductor 3 due to the chipping of the inclined contact surface 312a formed on the adhering material removing member 31a due to the adhering material adhering to the surface of the photoconductor 3. The occurrence of toner slip-through can be suppressed.
Moreover, the following effects can be show | played by setting the load applied to the deposit | attachment removal member 31a by the torsion coil spring which is an urging | biasing member in the range of 3 [N] -8 [N]. Durability decreases due to wear of the photoreceptor 3 and the deposit removal member 31a, and slippage of deposits and residual toner due to insufficient contact between the inclined contact surface 312a formed on the deposit removal member 31a and the photoreceptor 3 occurs. Generation can be suppressed.

(実施例4)
本実施形態のプリンタ100のプロセスカートリッジ2に備えた付着物除去機構30の実施例4について、図を用いて説明する。
図11は、本実施例に係る付着物除去部材31(a,b)の機能をスペーサ部材21(a,b)に持たせた付着物除去機構30の説明図であり、図11(a)が上方から見た説明図、図11(b)が正面側から見た説明図である。図12は、本実施例に係る付着物除去部材31aの機能を持たせられたスペーサ部材21aの説明図である。そして、図12(a)がスペーサ部材21aの斜め上からの斜視説明図、図12(b)がスペーサ部材21aの感光体軸方向内側からの側面説明図、図12(c)がスペーサ部材21aの感光体3側からの底面説明図である。また、図12(d)がスペーサ部材21aの感光体接触面212aの幅である先端幅:t1、及び感光体接触面212aを設けたリブ形状部の根元の幅であるリブ幅:t2の斜め下からの斜視説明図である。
Example 4
Example 4 of the deposit removal mechanism 30 provided in the process cartridge 2 of the printer 100 of this embodiment will be described with reference to the drawings.
FIG. 11 is an explanatory view of the deposit removing mechanism 30 in which the spacer member 21 (a, b) has the function of the deposit removing member 31 (a, b) according to the present embodiment. FIG. 11 is an explanatory diagram viewed from above, and FIG. 11B is an explanatory diagram viewed from the front side. FIG. 12 is an explanatory diagram of the spacer member 21a provided with the function of the deposit removing member 31a according to the present embodiment. FIG. 12A is a perspective explanatory view of the spacer member 21a obliquely from above, FIG. 12B is a side explanatory view of the spacer member 21a from the inner side in the photosensitive member axial direction, and FIG. 12C is the spacer member 21a. FIG. 6 is an explanatory bottom view from the photoreceptor 3 side of FIG. Further, FIG. 12D is an oblique view of the leading end width: t1 which is the width of the photoconductor contact surface 212a of the spacer member 21a, and the rib width: t2 which is the width of the base of the rib-shaped portion provided with the photoconductor contact surface 212a. It is a perspective explanatory view from the bottom.

本実施例の付着物除去機構30は、上記した実施例1乃至3の付着物除去機構と、付着物除去部材31(a,b)の機能をスペーサ部材21(a,b)に持たせていることに係る点が異なる。特に、本実施例のスペーサ部材21(a,b)の感光体3側に設けたリブ形状部と、実施例3の付着物除去部材31(a,b)のリブ形状部とは略同様である。したがって、上記した実施例1乃至3、及び従来例と同様な構成、及びその作用・効果については、適宜、省略して説明する。また、同一の構成部材、又は同様な機能を果す構成部材については、特に区別する必要がない限り、同一の符号を付して説明する。   The deposit removing mechanism 30 of this embodiment has the spacer member 21 (a, b) having the functions of the deposit removing mechanism of the first to third embodiments and the deposit removing member 31 (a, b). The point which relates to being different. In particular, the rib-shaped portion provided on the photosensitive member 3 side of the spacer member 21 (a, b) of this embodiment and the rib-shaped portion of the deposit removing member 31 (a, b) of Embodiment 3 are substantially the same. is there. Therefore, the configurations similar to those in the first to third embodiments and the conventional example, and the operation and effect thereof will be omitted as appropriate. Further, the same constituent members or constituent members performing the same function will be described with the same reference numerals unless particularly distinguished.

本実施例の付着物除去機構30では、上記のように付着物除去部材31(a,b)の機能を持たせたスペーサ部材21(a,b)を、図11(a)に示すように感光体3の両端付近に配置されている。図中右側に配置されているスペーサ部材21aには光書込ヘッド61に接触するヘッド接触面211aが2ヶ所設けられている。そして、左側に配置されているスペーサ部材21bには光書込ヘッド61に接触するヘッド接触面211bが1ヶ所設けられ、3つの面で光書込ヘッド61を受けている。また、スペーサ部材21(a,b)は感光体3の回転方向に対して傾斜部分を有しており、傾斜の方向は内側から外側に広がるような構成となっている。
この傾斜部分により、実施例2、3の付着物除去部材31(a,b)と同様に、スペーサ部材21(a,b)の感光体回転方向上流側に除去した付着物が堆積することを防げるため、図7で説明した画像不良を抑制することが可能となる。
In the deposit removing mechanism 30 of the present embodiment, the spacer member 21 (a, b) having the function of the deposit removing member 31 (a, b) as described above is shown in FIG. It is arranged near both ends of the photoreceptor 3. The spacer member 21 a arranged on the right side in the drawing is provided with two head contact surfaces 211 a that contact the optical writing head 61. The spacer member 21b disposed on the left side is provided with one head contact surface 211b that contacts the optical writing head 61, and receives the optical writing head 61 on three surfaces. Further, the spacer member 21 (a, b) has an inclined portion with respect to the rotation direction of the photosensitive member 3, and the inclination direction spreads from the inside to the outside.
By this inclined portion, the removed deposits are accumulated on the upstream side in the photoconductor rotating direction of the spacer member 21 (a, b), similarly to the deposit removing members 31 (a, b) of the second and third embodiments. Therefore, the image defect described with reference to FIG. 7 can be suppressed.

ここで、スペーサ部材21(a,b)は、感光体軸方向にほぼ対称な形状をしており、それぞれの構成も光書込ヘッド61とのヘッド接触面(a,b)の数を除き、ほぼ同様であるため、以下の説明では、スペーサ部材21aを例にとって説明する。
本実施例のスペーサ部材21aは、実施例3の付着物除去部材31aと同様に、感光体3との接触面を2つの接触面を設けている。
具体的には、図12(a)乃至(d)に示すように、実施例3の感光体3の回転方向に対して傾斜を有した傾斜接触面312aに相当する傾斜した感光体接触面212aを有している。そして、感光体接触面212aとは別に、感光体3と接触する接触面が、感光体3の回転方向に平行な平行接触面213aも有しており、感光体接触面212aと平行接触面213aとは交わらないように離間して設けられている。
Here, the spacer member 21 (a, b) has a substantially symmetric shape in the photosensitive member axial direction, and each configuration also excludes the number of head contact surfaces (a, b) with the optical writing head 61. In the following description, the spacer member 21a will be described as an example.
The spacer member 21a of the present embodiment is provided with two contact surfaces as the contact surface with the photosensitive member 3 in the same manner as the deposit removing member 31a of the third embodiment.
Specifically, as shown in FIGS. 12A to 12D, an inclined photoconductor contact surface 212a corresponding to an inclined contact surface 312a having an inclination with respect to the rotation direction of the photoconductor 3 of the third embodiment. have. In addition to the photoreceptor contact surface 212a, the contact surface that contacts the photoreceptor 3 also has a parallel contact surface 213a that is parallel to the rotation direction of the photoreceptor 3, and the photoreceptor contact surface 212a and the parallel contact surface 213a. So as not to intersect with each other.

傾斜した感光体接触面212aと平行接触面213aとは、スペーサ部材21aの2つのヘッド接触面211aを設けた平板状の部分の、各ヘッド接触面211aを設けた面とは反対側(感光体3側)にそれぞれ形成されたリブ形状部の先端に形成された面である。また、感光体接触面212aと平行接触面213aを設けた各リブ形状部の他にはリブ形状の部分は設けず、図12(c)に示すようにスペーサ部材21aの感光体接触面212aと平行接触面213aの各リブ形状部はつなげず、離して配置している。   The inclined photoreceptor contact surface 212a and the parallel contact surface 213a are the opposite sides of the flat surface portion of the spacer member 21a provided with the two head contact surfaces 211a from the surface provided with each head contact surface 211a (photoconductor It is a surface formed at the tip of each rib-shaped portion formed on the (3 side). In addition to the rib-shaped portions provided with the photoconductor contact surface 212a and the parallel contact surface 213a, no rib-shaped portion is provided, and the photoconductor contact surface 212a of the spacer member 21a as shown in FIG. The rib-shaped portions of the parallel contact surface 213a are not connected but are arranged apart from each other.

また、図12(b)、(c)に示すように、感光体3と接触するリブ形状部に切欠かられた部分の先端の面である傾斜した感光体接触面212aの形状は円弧形状で、且つ傾斜を有する形状となっている。そして、上記したようにスペーサ部材21aの傾斜部分の接触面でもある感光体接触面212aは、スペーサ部材21aに設けられたリブ形状部の先端の面であるため、弾性変形し易くなり、感光体3との隙間をなくすことができる。
加えて、図12(c)、(d)に示すように感光体3との感光体接触面212aの幅である先端幅:t1は、感光体接触面212aを設けたリブ形状部の根元の幅であるリブ幅:t2よりも細く(小さく)形成されている。このように構成することで、先端幅:t1とリブ幅:t2とが同じ構成のものよりも弾性変形し易くなり、感光体3にさらに当接し易くなるように構成されている。
Further, as shown in FIGS. 12B and 12C, the shape of the inclined photosensitive member contact surface 212a, which is the surface of the tip portion of the rib-shaped portion that contacts the photosensitive member 3, is an arc shape. And it has a shape having an inclination. As described above, the photosensitive member contact surface 212a, which is also the contact surface of the inclined portion of the spacer member 21a, is the surface of the tip of the rib-shaped portion provided on the spacer member 21a, so that it is easily elastically deformed, and the photosensitive member. 3 can be eliminated.
In addition, as shown in FIGS. 12C and 12D, the leading end width t1, which is the width of the photoreceptor contact surface 212a with the photoreceptor 3, is the root of the rib-shaped portion provided with the photoreceptor contact surface 212a. Rib width, which is the width, is formed narrower (smaller) than t2. By being configured in this way, the tip width: t1 and the rib width: t2 are more easily elastically deformed than those having the same configuration, and are more easily contacted with the photoreceptor 3.

また、光書込ヘッド61がヘッド接触面211a上に当接した際に、不図示のヘッド付勢手段により、2つのヘッド接触面211aは光書込ヘッド61から感光体3方向への荷重を受ける構成となっている。そして、この荷重が傾斜した感光体接触面212aと平行接触面213aに伝達されることとなる。   Further, when the optical writing head 61 abuts on the head contact surface 211a, the two head contact surfaces 211a apply a load in the direction of the photosensitive member 3 from the optical writing head 61 by a head urging unit (not shown). It is configured to receive. This load is transmitted to the inclined photoreceptor contact surface 212a and parallel contact surface 213a.

本実施例の付着物除去機構30では、上記したように付着物除去部材31aの機能をスペーサ部材21aに持たせている。このように光書込ヘッド61と感光体3との間隔を決める役割であるスペーサ部材21aに付着物除去部材31aの機能を持たせることで、プロセスカートリッジ2(作像部)の部品点数を減らし、プリンタ100の省スペース、低コスト化することができる。   In the deposit removing mechanism 30 of the present embodiment, the spacer member 21a has the function of the deposit removing member 31a as described above. In this way, the spacer member 21a, which plays a role in determining the distance between the optical writing head 61 and the photosensitive member 3, has the function of the deposit removing member 31a, thereby reducing the number of parts of the process cartridge 2 (image forming unit). Thus, the space of the printer 100 can be saved and the cost can be reduced.

上記本実施形態では、本発明を直接転写方式のモノクロ画像形成装置であるプリンタ100に適用した例について説明したが、本発明はこのような構成に限定されるものではない。例えば、4回転方式のカラー対応の画像形成装置、直転タンデム方式のカラー対応の画像形成装置、中間転写タンデム方式のカラー対応の画像形成装置にも適用可能である。
また、露光装置60の露光手段として光書込ヘッド61を用いたプリンタ100について説明したが、本発明はこのような構成に限定されるものではなく、例えば、ポリゴンミラー等を用いた露光装置を備えた画像形成装置にも適用可能である。
また、潜像担持体としてドラム状の感光体3を用いたプリンタ100について説明したが、本発明はこのような構成に限定されるものではなく、例えば、無端ベルト状の感光体、所謂、感光体ベルトを用いた画像形成装置にも適用可能である。より具体的には、感光体ベルトの架張ローラに、感光体ベルトを介して付着物除去部材やスペーサ部材を当接させる構成にも適用可能である。
In the above embodiment, the example in which the present invention is applied to the printer 100 which is a direct transfer type monochrome image forming apparatus has been described. However, the present invention is not limited to such a configuration. For example, the present invention can be applied to a four-rotation color image forming apparatus, a direct-rotation tandem color image forming apparatus, and an intermediate transfer tandem color image forming apparatus.
Further, the printer 100 using the optical writing head 61 as the exposure unit of the exposure apparatus 60 has been described. However, the present invention is not limited to such a configuration. For example, an exposure apparatus using a polygon mirror or the like is used. The present invention is also applicable to the image forming apparatus provided.
Further, the printer 100 using the drum-shaped photosensitive member 3 as the latent image carrier has been described. However, the present invention is not limited to such a configuration. For example, the endless belt-shaped photosensitive member, so-called photosensitive member is used. The present invention can also be applied to an image forming apparatus using a body belt. More specifically, the present invention can also be applied to a configuration in which a deposit removing member or a spacer member is brought into contact with the stretching roller of the photosensitive belt via the photosensitive belt.

以上に説明したものは一例であり、本発明は、次の態様毎に特有の効果を奏する。
(態様A)
転写後に感光体3などの潜像担持体上に残った残留トナーを清掃し、前記潜像担持体の移動方向に垂直な幅方向における用紙Pなどの記録媒体の最大用紙幅:L3などの最大領域幅よりも広いクリーニングブレード幅:L5などの清掃領域を有するクリーニングブレード5などのクリーニング部材とは別に設けられ、前記潜像担持体上に付着した付着物を除去する付着物除去部材31(a,b)などの除去部材を備えた潜像担持体上の付着物を除去する付着物除去機構30などの付着物除去機構であって、前記除去部材は、前記潜像担持体の前記幅方向における、最大画像領域幅:L1などの最大画像領域幅の内側から、前記記録媒体の最大領域幅の外側にわたって接触することを特徴とするものである。
What has been described above is merely an example, and the present invention has a specific effect for each of the following modes.
(Aspect A)
Residual toner remaining on the latent image carrier such as the photosensitive member 3 after the transfer is cleaned, and the maximum paper width of the recording medium such as the paper P in the width direction perpendicular to the moving direction of the latent image carrier: maximum such as L3 Cleaning blade width wider than the region width: an attachment removing member 31 (a) provided separately from a cleaning member such as the cleaning blade 5 having a cleaning region such as L5 and for removing the attachment attached on the latent image carrier. , B) is a deposit removal mechanism such as a deposit removal mechanism 30 that removes deposits on the latent image carrier including the removal member, and the removal member is in the width direction of the latent image carrier. The maximum image area width is in contact from the inside of the maximum image area width such as L1 to the outside of the maximum area width of the recording medium.

これによれば、上記した実施例1(乃至4)で説明したように、次のような効果を奏することができる。
特許文献2に記載の構成と異なり、クリーニング部材が記録媒体の最大領域幅よりも広い清掃領域を有するとともに、クリーニング部材とは別に設けた付着物除去機構の除去部材が、最大画像領域幅、つまり記録媒体の最大領域幅の内側から外側にわたって接触する。したがって、記録媒体の最大領域幅の端部近傍で生じる潜像担持体上の付着物を除去する動作を、クリーニング部材と付着物除去機構の除去部材とで2度行って、記録媒体の最大領域幅の端部近傍で生じるタルク成分等の付着物も除去できる。
このため、特許文献1に記載の構成のように潜像担持体上における帯電ローラ6などの帯電装置による帯電幅又は露光装置60などの露光装置による最大露光幅:L2’などの最大露光幅を記録媒体の最大画像領域幅よりも広くして清掃電位部を形成する必要がない。
よって、画像形成装置の大型化を抑制しつつ、潜像担持体上における記録媒体の最大領域幅の端部近傍で生じる潜像担持体上の付着物も除去可能な付着物除去機構を提供できる。
According to this, as described in the first embodiment (to 4), the following effects can be obtained.
Unlike the configuration described in Patent Document 2, the cleaning member has a cleaning region wider than the maximum region width of the recording medium, and the removal member of the deposit removing mechanism provided separately from the cleaning member has a maximum image region width, that is, Contact is made from the inside to the outside of the maximum area width of the recording medium. Therefore, the operation of removing the deposit on the latent image carrier generated near the end of the maximum area width of the recording medium is performed twice by the cleaning member and the removing member of the deposit removing mechanism, so that the maximum area of the recording medium is obtained. Deposits such as talc components generated near the end of the width can also be removed.
Therefore, as in the configuration described in Patent Document 1, a charging width by a charging device such as the charging roller 6 on the latent image carrier or a maximum exposure width such as a maximum exposure width L2 ′ by an exposure device such as the exposure device 60 is set. It is not necessary to form the cleaning potential portion wider than the maximum image area width of the recording medium.
Therefore, it is possible to provide a deposit removing mechanism capable of removing deposits on the latent image carrier generated near the end of the maximum area width of the recording medium on the latent image carrier while suppressing an increase in the size of the image forming apparatus. .

(態様B)
(態様A)において、付着物除去部材31(a,b)などの前記除去部材の感光体3などの前記潜像担持体との接触面には、前記潜像担持体の移動方向上流から下流に向かって、感光体軸方向などの前記幅方向の外側に広がるような傾斜部分を有していることを特徴とするものである。
これによれば、上記した実施例2(乃至4)で説明したように、次のような効果を奏することができる。除去部材で潜像担持体上から除去した(かき取った)付着物の大半を前記幅方向の外側の最大用紙幅:L3などの最大媒体領域幅の外に押し出すことができ、付着物除去部材の感光体回転方向上流側に除去した付着物が堆積することを防げる。
したがって、除去した付着物が、潜像担持体上に再付着する機会を大幅に減らすことが可能となり、除去した付着物の再付着に起因した画像不良の発生を抑制できる。
(Aspect B)
In (Aspect A), the contact surface of the removing member such as the deposit removing member 31 (a, b) with the latent image carrier such as the photosensitive member 3 is located downstream from the upstream in the moving direction of the latent image carrier. It has an inclined portion that spreads outward in the width direction such as the photosensitive member axial direction.
According to this, as explained in the second embodiment (to 4), the following effects can be obtained. Most of the deposits removed (scraped) from the latent image carrier by the removing member can be pushed out of the maximum media area width such as the maximum sheet width L3 outside the width direction, and the deposit removing member It is possible to prevent deposits that have been removed from accumulating on the upstream side of the photoconductor rotation direction.
Therefore, it is possible to greatly reduce the chance that the removed deposits are reattached on the latent image carrier, and the occurrence of image defects due to the reattachment of the removed deposits can be suppressed.

(態様C)
(態様B)において、傾斜接触面312aなどの前記傾斜部分の接触面は、付着物除去部材31aなどの前記除去部材に設けられたリブ形状部の先端の面であることを特徴とするものである。
これによれば、上記した実施例3(又は4)で説明したように、弾性変形し易くなり、感光体3などの潜像担持体との隙間をなくすことができる。
(Aspect C)
In (Aspect B), the contact surface of the inclined portion such as the inclined contact surface 312a is a surface of the tip of a rib-shaped portion provided in the removal member such as the deposit removal member 31a. is there.
According to this, as described in the third embodiment (or 4) described above, it is easy to be elastically deformed, and a gap between the latent image carrier such as the photosensitive member 3 can be eliminated.

(態様D)
(態様A)乃至(態様C)のいずれかにおいて、付着物除去部材31(a,b)などの前記除去部材の材質は、ポリアセタール(POM)であることを特徴とするものである。
これによれば、上記した実施例1(乃至4)で説明したように、次のような効果を奏することができる。除去部材の材質をポリアセタールにすることで、接触する感光体3などの潜像担持体の磨耗を少なくでき、潜像担持体の寿命を長くできるとともに、付着物や残留トナー等の除去作用も高めることができる。
(Aspect D)
In any one of (Aspect A) to (Aspect C), the material of the removal member such as the deposit removal member 31 (a, b) is polyacetal (POM).
According to this, as described in the first embodiment (to 4), the following effects can be obtained. By using polyacetal as the material for the removal member, it is possible to reduce the wear of the latent image carrier such as the photosensitive member 3 that comes into contact, to prolong the life of the latent image carrier, and to enhance the action of removing deposits and residual toner. be able to.

(態様E)
(態様A)乃至(態様D)のいずれかにおいて、露光装置60などの前記露光装置は光書込ヘッド61などの光書込ヘッドであり、前記光書込ヘッドは、ヘッド付勢部材により感光体3などの前記潜像担持体へ向けて付勢され、当該光書込ヘッド及び前記潜像担持体にそれぞれ接触する感光体接触面212aや平行接触面213aなどの面を有した、当該光書込ヘッドと前記潜像担持体との間に設けられるスペーサ部材21aなどのスペーサ部材により、前記潜像担持体との間隔が規制されており、付着物除去部材31aなどの前記除去部材の機能を前記スペーサ部材に持たせていることを特徴とするものである。
これによれば、上記した実施例4で説明したように、プロセスカートリッジ2などの作像部の部品点数を減らし、プリンタ100などの画像形成装置の省スペース、低コスト化することができる。
(Aspect E)
In any one of (Aspect A) to (Aspect D), the exposure apparatus such as the exposure apparatus 60 is an optical writing head such as an optical writing head 61, and the optical writing head is photosensitive by a head biasing member. The light having a surface such as a photoconductor contact surface 212a and a parallel contact surface 213a that are urged toward the latent image carrier such as the body 3 and respectively contact the optical writing head and the latent image carrier. A spacer member such as a spacer member 21a provided between the writing head and the latent image carrier has a distance between the latent image carrier and the function of the removal member such as the deposit removal member 31a. Is provided on the spacer member.
According to this, as described in the fourth embodiment, the number of parts of the image forming unit such as the process cartridge 2 can be reduced, and the space and cost of the image forming apparatus such as the printer 100 can be reduced.

(態様F)
(態様A)乃至(態様E)のいずれかにおいて、用紙Pなどの記録媒体へ転写するトナー像の形成を行っていない時に、感光体3などの前記潜像担持体表面を清掃するための清掃用トナーを供給し、クリーニングブレード5を有した感光体クリーニング装置などの前記クリーニング装置で最大画像領域幅内の付着物を除去することを特徴とするものである。
これによれば、上記した実施例2(乃至4)で説明したように、次のような効果を奏することができる。付着物除去部材31(a,b)などの除去部材によって除去した付着物が、感光体3などの潜像担持体上の最大画像領域幅:L1などの画像形成領域内で再付着して大きくなってしまい、最終的に画像不良を引き起こすことを防止できる。
(Aspect F)
In any one of (Aspect A) to (Aspect E), cleaning is performed for cleaning the surface of the latent image carrier such as the photosensitive member 3 when the toner image to be transferred to the recording medium such as the paper P is not formed. The toner is supplied, and deposits within the maximum image area width are removed by the cleaning device such as the photoconductor cleaning device having the cleaning blade 5.
According to this, as explained in the second embodiment (to 4), the following effects can be obtained. The deposits removed by the removal member such as the deposit removal member 31 (a, b) are reattached in the image forming area such as the maximum image area width: L1 on the latent image carrier such as the photosensitive member 3 to become large. Thus, it can be prevented that the image defect is finally caused.

(態様G)
感光体3などの潜像担持体と、該潜像担持体上に付着した付着物を除去する付着物除去機構とを有したプロセスカートリッジ2などのプロセスカートリッジにおいて、前記付着物除去機構として(態様A)乃至(態様F)のいずれかの付着物除去機構30などの付着物除去機構を有したことを特徴とするものである。
これによれば、上記した本実施形態で説明したように、(態様A)乃至(態様F)のいずれかの付着物除去機構と同様な効果を奏することができるプロセスカートリッジを提供できる。
(Aspect G)
In a process cartridge such as the process cartridge 2 having a latent image carrier such as the photosensitive member 3 and a deposit removal mechanism for removing the deposit adhered on the latent image carrier, the deposit removal mechanism (mode) A deposit removing mechanism such as the deposit removing mechanism 30 of any one of A) to (Aspect F) is provided.
According to this, as described in the present embodiment described above, it is possible to provide a process cartridge that can exhibit the same effect as any of the deposit removal mechanisms of (Aspect A) to (Aspect F).

(態様H)
感光体3などの潜像担持体上に付着した付着物を除去する付着物除去機構を備えたプリンタ100などの画像形成装置において、前記付着物除去機構として、(態様A)乃至(態様F)のいずれかの付着物除去機構30などの付着物除去機構、又は(態様G)のプロセスカートリッジ2などのプロセスカートリッジに有した付着物除去機構を備えたことを特徴とするものである。
これによれば、上記した本実施形態で説明したように、(態様A)乃至(態様F)のいずれかの付着物除去機構、又は(態様G)のプロセスカートリッジと同様な効果を奏することができる画像形成装置を提供できる。
(Aspect H)
In an image forming apparatus such as the printer 100 provided with an attached matter removing mechanism for removing attached matter attached on a latent image carrier such as the photosensitive member 3, the attached matter removing mechanism includes (Aspect A) to (Aspect F). The deposit removing mechanism such as any one of the deposit removing mechanism 30 or the deposit removing mechanism included in the process cartridge such as the process cartridge 2 of (Aspect G) is provided.
According to this, as described in the above-described embodiment, the same effect as the deposit removal mechanism of any one of (Aspect A) to (Aspect F) or the process cartridge of (Aspect G) can be obtained. An image forming apparatus that can be provided can be provided.

(態様I)
(態様H)において、露光装置60などの露光装置として光書込ヘッド61などの光書込ヘッドを備え、前記光書込ヘッドの発光素子が、LEDもしくは有機EL素子であることを特徴とするものである。
これによれば、上記した本実施形態で説明したように、露光装置60などの露光装置をコンパクトに構成してプリンタ100などの画像形成装置の小型化に貢献できるとともに、感光体3などの潜像担持体上に良好な静電潜像を形成することができる。
(Aspect I)
In (Aspect H), an optical writing head such as an optical writing head 61 is provided as an exposure apparatus such as the exposure apparatus 60, and a light emitting element of the optical writing head is an LED or an organic EL element. Is.
According to this, as described in the above-described embodiment, the exposure apparatus such as the exposure apparatus 60 can be made compact to contribute to the downsizing of the image forming apparatus such as the printer 100 and the latent image such as the photosensitive member 3 can be used. A good electrostatic latent image can be formed on the image carrier.

2 プロセスカートリッジ
3 感光体
4 現像ローラ
5 クリーニングブレード
6 帯電ローラ
11 給紙カセット
12 給紙ローラ
14 レジストローラ
15 排紙ローラ対
21(a,b) スペーサ部材
30 付着物除去機構
31(a,b) 付着物除去部材
32 付勢バネ
60 露光装置
61 光書込ヘッド
62 レンズアレイ
63 ヘッドフレーム
70 転写ローラ
80 定着装置
100 プリンタ
110 装置本体
211(a,b) ヘッド接触面(スペーサ部材)
212(a) 感光体接触面(スペーサ部材)
213a 平行接触面(スペーサ部材)
311a 座(付着物除去部材)
312a 傾斜接触面(付着物除去部材)
313a 平行接触面(付着物除去部材)
P 用紙
2 Process cartridge 3 Photoconductor 4 Developing roller 5 Cleaning blade 6 Charging roller 11 Paper feed cassette 12 Paper feed roller 14 Registration roller 15 Paper discharge roller pair 21 (a, b) Spacer member 30 Adherent removal mechanism 31 (a, b) Attachment removing member 32 Biasing spring 60 Exposure device 61 Optical writing head 62 Lens array 63 Head frame 70 Transfer roller 80 Fixing device 100 Printer 110 Device main body 211 (a, b) Head contact surface (spacer member)
212 (a) Photoconductor contact surface (spacer member)
213a Parallel contact surface (spacer member)
311a seat (attachment removal member)
312a Inclined contact surface (attachment removal member)
313a Parallel contact surface (attachment removal member)
P paper

特開昭61−120181号公報Japanese Patent Laid-Open No. 61-120181 特開2007−076031号公報JP 2007-076031 A

Claims (9)

転写後に潜像担持体上に残った残留トナーを清掃し、前記潜像担持体の移動方向に垂直な幅方向における記録媒体の最大領域幅よりも広い清掃領域を有するクリーニング部材とは別に設けられ、前記潜像担持体上に付着した付着物を除去する除去部材を備えた潜像担持体上の付着物を除去する付着物除去機構であって、
前記除去部材は、前記潜像担持体の前記幅方向における、最大画像領域幅の内側から、前記記録媒体の最大領域幅の外側にわたって接触することを特徴とする付着物除去機構。
Residual toner remaining on the latent image carrier after the transfer is cleaned and provided separately from a cleaning member having a cleaning area wider than the maximum area width of the recording medium in the width direction perpendicular to the moving direction of the latent image carrier. A deposit removal mechanism for removing deposits on the latent image carrier comprising a removing member that removes deposits deposited on the latent image carrier;
The deposit removing mechanism is characterized in that the removing member contacts from the inside of the maximum image area width in the width direction of the latent image carrier to the outside of the maximum area width of the recording medium.
請求項1に記載の付着物除去機構において、
前記除去部材の前記潜像担持体との接触面には、前記潜像担持体の移動方向上流から下流に向かって、前記幅方向の外側に広がるような傾斜部分を有していることを特徴とする付着物除去機構。
In the deposit removal mechanism according to claim 1,
The contact surface of the removal member with the latent image carrier has an inclined portion that spreads outward in the width direction from upstream to downstream in the moving direction of the latent image carrier. Adherent removal mechanism.
請求項2に記載の付着物除去機構において、
前記傾斜部分の接触面は、前記除去部材に設けられたリブ形状部の先端の面であることを特徴とする付着物除去機構。
In the deposit removal mechanism according to claim 2,
The contact removing surface of the inclined portion is a surface of a tip of a rib-shaped portion provided on the removing member.
請求項1乃至3のいずれか一に記載の付着物除去機構において、
前記除去部材の材質は、ポリアセタール(POM)であることを特徴とする付着物除去機構。
The deposit removal mechanism according to any one of claims 1 to 3,
The material for the removing member is polyacetal (POM).
請求項1乃至4のいずれか一に記載の付着物除去機構において、
前記露光装置は光書込ヘッドであり、
前記光書込ヘッドは、ヘッド付勢部材により前記潜像担持体へ向けて付勢され、当該光書込ヘッド及び前記潜像担持体にそれぞれ接触する面を有した、当該光書込ヘッドと前記潜像担持体との間に設けられるスペーサ部材により、前記潜像担持体との間隔が規制されており、
前記除去部材の機能を前記スペーサ部材に持たせていることを特徴とする付着物除去機構。
The deposit removal mechanism according to any one of claims 1 to 4,
The exposure apparatus is an optical writing head;
The optical writing head is urged toward the latent image carrier by a head urging member, and the optical writing head has surfaces that respectively contact the optical writing head and the latent image carrier. An interval between the latent image carrier and the latent image carrier is regulated by a spacer member provided between the latent image carrier and the latent image carrier.
The deposit removing mechanism, wherein the spacer member has a function of the removing member.
請求項1乃至5のいずれか一に記載の付着物除去機構において、
記録媒体へ転写するトナー像の形成を行っていない時に、前記潜像担持体表面を清掃するための清掃用トナーを供給し、前記クリーニング装置で付着物を除去することを特徴とする付着物除去機構。
In the deposit removal mechanism according to any one of claims 1 to 5,
Adherent removal characterized by supplying cleaning toner for cleaning the surface of the latent image carrier when the toner image to be transferred to the recording medium is not formed and removing the adhering substance by the cleaning device. mechanism.
潜像担持体と、該潜像担持体上に付着した付着物を除去する付着物除去機構とを有したプロセスカートリッジにおいて、
前記付着物除去機構として、請求項1乃至6のいずれか一に記載の付着物除去機構を有したことを特徴とするプロセスカートリッジ。
In a process cartridge having a latent image carrier and a deposit removal mechanism for removing deposits adhered to the latent image carrier,
7. A process cartridge comprising the deposit removing mechanism according to claim 1 as the deposit removing mechanism.
潜像担持体上に付着した付着物を除去する付着物除去機構を備えた画像形成装置において、
前記付着物除去機構として、請求項1乃至6のいずれか一に記載の付着物除去機構、又は請求項7に記載のプロセスカートリッジに有した付着物除去機構を備えたことを特徴とする画像形成装置。
In an image forming apparatus provided with a deposit removal mechanism for removing deposits attached on a latent image carrier,
An image forming apparatus comprising the deposit removing mechanism according to claim 1 or the deposit removing mechanism provided in the process cartridge according to claim 7 as the deposit removing mechanism. apparatus.
請求項8に記載の画像形成装置において、
露光装置として光書込ヘッドを備え、
前記光書込ヘッドの発光素子が、LEDもしくは有機EL素子であることを特徴とする画像形成装置。
The image forming apparatus according to claim 8.
An optical writing head is provided as an exposure device,
An image forming apparatus, wherein a light emitting element of the optical writing head is an LED or an organic EL element.
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JP2015108645A (en) * 2013-10-24 2015-06-11 株式会社リコー Process unit, and image forming apparatus
JP2017009929A (en) * 2015-06-25 2017-01-12 株式会社リコー Image forming apparatus
JP2017097321A (en) * 2015-07-29 2017-06-01 株式会社リコー Mechanism for removing foreign substance on photoreceptor, process unit, and image forming apparatus
US9772601B2 (en) 2015-07-29 2017-09-26 Ricoh Company, Ltd. Image forming apparatus and process unit

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JP2015108645A (en) * 2013-10-24 2015-06-11 株式会社リコー Process unit, and image forming apparatus
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