JPH063878A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- Publication number
- JPH063878A JPH063878A JP4183148A JP18314892A JPH063878A JP H063878 A JPH063878 A JP H063878A JP 4183148 A JP4183148 A JP 4183148A JP 18314892 A JP18314892 A JP 18314892A JP H063878 A JPH063878 A JP H063878A
- Authority
- JP
- Japan
- Prior art keywords
- process cartridge
- photoconductor
- photosensor
- attached
- cleaning member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Or Security For Electrophotography (AREA)
- Cleaning In Electrography (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、レ−ザを用いた、プ
リンタ・複写機・ファクシミリなど、電子写真方式（感
光体に形成した画像をシ−トに転写して記録を行う方
式）によりシ−トに記録を行う電子写真装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic system (a system for transferring an image formed on a photoconductor to a sheet for recording) using a laser, such as a printer, a copying machine and a facsimile. The present invention relates to an electrophotographic apparatus that records on a sheet.
【０００２】[0002]
【従来の技術】従来、例えば、レ−ザプリンタでは、感
光体のまわりに帯電器・現像器・転写器などの電子写真
プロセス手段を配置して感光体とそれら電子写真プロセ
ス手段のいくつかをユニット化してプロセスカ−トリッ
ジを構成し、そのプロセスカ−トリッジを装置本体に対
して着脱自在とする。2. Description of the Related Art Conventionally, for example, in a laser printer, an electrophotographic process means such as a charging device, a developing device and a transfer device is arranged around a photoconductor, and the photoconductor and some of the electrophotographic process means are arranged. The process cartridge is constructed as a unit, and the process cartridge is detachably attached to the apparatus main body.
【０００３】一方、現像時に前記感光体上に付着したト
ナ−濃度を検知するフォトセンサを備え、そのフォトセ
ンサで感光体上のトナ−濃度を検知してその検知結果を
信号によって制御装置などに送りトナ−濃度を一定に保
持するようになっている。On the other hand, a photosensor for detecting the toner density adhering to the photoconductor at the time of development is provided, and the photosensor detects the toner density on the photoconductor, and the detection result is sent to a controller or the like by a signal. The feed toner concentration is kept constant.
【０００４】[0004]
【発明が解決しようとする課題】ところが、現像器でト
ナ−を感光体へ付着するときなどにトナ−が飛散してフ
ォトセンサが汚れることがある。この汚れは、良好な画
像を得るために定期的に清掃する必要があり、サ−ビス
マンがメンテナンスを行うレ−ザプリンタにあっては確
実に定期的に清掃するため問題はないが、ユ−ザメンテ
ナンスを基本とするレ−ザプリンタにあっては、不慣れ
なユ−ザによる拭き残しやメンテナンス忘れなどがあっ
て良好な画像が得られなくなるという問題点があった。However, when the toner is adhered to the photoconductor by the developing device, the toner may scatter and the photosensor may become dirty. This stain needs to be cleaned regularly in order to obtain a good image, and there is no problem with a laser printer that is serviced by a serviceman because it is cleaned regularly and surely. A laser printer based on the maintenance has a problem that an unfamiliar user may leave unwiping or forget to perform maintenance, so that a good image cannot be obtained.
【０００５】そこで、この発明の目的は、フォトセンサ
の清掃が定期的に確実に行われるようにして常に良好な
画像が得られるようにすることにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to ensure that a photo sensor is regularly cleaned so that a good image can always be obtained.
【０００６】[0006]
【課題を解決するための手段】そのため、請求項１に記
載の電子写真装置は、例えば以下の図１乃至３に示す実
施例のように、感光体１１のまわりに電子写真プロセス
手段を配置して前記感光体１１とそれら電子写真プロセ
ス手段のいくつかをユニット化してプロセスカ−トリッ
ジ１６を構成し、そのプロセスカ−トリッジ１６を装置
本体１０に対して着脱自在とする一方、前記感光体１１
上のトナ−濃度を検知するフォトセンサ２１を備える電
子写真装置において、前記プロセスカ−トリッジ１６の
着脱時に前記フォトセンサ２１に接触してそれを清掃す
るクリーニング部材２７を、該プロセスカ−トリッジ１
６に設けてなる、ことを特徴とする。Therefore, in the electrophotographic apparatus according to the first aspect of the present invention, the electrophotographic process means is arranged around the photoconductor 11 as in the embodiments shown in FIGS. 1 to 3 below. The photoconductor 11 and some of the electrophotographic process means are unitized to form a process cartridge 16, and the process cartridge 16 can be attached to and detached from the apparatus main body 10 while the photoconductor 11 is formed.
In an electrophotographic apparatus including a photo sensor 21 for detecting the toner density, a cleaning member 27 that contacts the photo sensor 21 when the process cartridge 16 is attached or detached and cleans the photo sensor 21 is provided.
6 is provided.
【０００７】また、請求項２に記載のものは、例えば以
下の図４乃至６に示す実施例のように、前記電子写真プ
ロセス手段を用いて前記感光体１１上に形成した画像を
シ−トに転写して後、そのシ−トを定着器２２の例えば
定着ロ−ラ２３のような定着部材と例えば加圧ロ−ラ２
４のような加圧部材間を通して該シ−ト上の転写画像を
定着する請求項１に記載の電子写真装置において、前記
プロセスカ−トリッジ１６を前記装置本体１０に取り付
けたとき前記クリーニング部材２７を前記定着部材の周
面に押し当ててなる、ことを特徴とする。According to a second aspect of the present invention, as in the embodiments shown in FIGS. 4 to 6 below, for example, an image formed on the photoconductor 11 by using the electrophotographic process means is formed into a sheet. After being transferred to the fixing roller 22, the sheet is transferred to a fixing member such as the fixing roller 23 and the pressure roller 2.
4. The electrophotographic apparatus according to claim 1, wherein the transfer image on the sheet is fixed through a pressure member such as No. 4, the cleaning member 27 when the process cartridge 16 is attached to the apparatus main body 10. Is pressed against the peripheral surface of the fixing member.
【０００８】[0008]
【作用】そして、請求項１に記載のものでは、装置本体
１０にプロセスカ−トリッジ１６を着脱するとき、クリ
ーニング部材２７をフォトセンサ２１に接触してそれを
清掃する。When the process cartridge 16 is attached to or detached from the apparatus main body 10, the cleaning member 27 is brought into contact with the photosensor 21 to clean it.
【０００９】また、請求項２に記載のものでは、装置本
体１０にプロセスカ−トリッジ１６を取り付けたとき、
クリーニング部材２７を定着器２２の定着部材の周面に
押し当ててそれを清掃する。According to the second aspect of the present invention, when the process cartridge 16 is attached to the apparatus main body 10,
The cleaning member 27 is pressed against the peripheral surface of the fixing member of the fixing device 22 to clean it.
【００１０】[0010]
【実施例】以下、図面を参照しつつ、この発明の実施例
について説明する。図１は、この発明の一実施例である
レーザプリンタの内部機構を示す全体構成概略図であ
る。図中符号１０で示すものは、装置本体である。装置
本体１０内には、ほぼ中央に感光体１１を設ける。その
感光体１１のまわりには、感光体１１の下側に帯電器１
２を、以下図中矢印で示す駆動方向に順に、現像器１
３、転写器１４、クリーニング器１５を配置する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of the entire configuration showing the internal mechanism of a laser printer according to an embodiment of the present invention. Reference numeral 10 in the figure denotes the apparatus main body. A photoconductor 11 is provided substantially in the center of the apparatus body 10. Around the photoconductor 11, a charger 1 is provided below the photoconductor 11.
2 in the order of the driving direction shown by the arrow in the drawing below,
3, the transfer device 14 and the cleaning device 15 are arranged.
【００１１】そして、帯電器１２と現像器１３およびク
リーニング器１５は、感光体１１とともに１つのユニッ
トに構成してプロセスカ−トリッジ１６として装置本体
１０に対して着脱自在とする。その下側には、光書込み
器１７を配置し、装置本体の下部には、シートを収納し
た給紙カセット１８を着脱自在に取り付ける。The charging device 12, the developing device 13 and the cleaning device 15 together with the photosensitive member 11 are constructed as one unit and are detachably attached to the apparatus main body 10 as a process cartridge 16. An optical writer 17 is arranged on the lower side of the apparatus, and a sheet feeding cassette 18 accommodating sheets is detachably attached to the lower portion of the apparatus main body.
【００１２】そして、その給紙カセット１８から給紙コ
ロ１９によって矢示Ａ方向に送り出したシートは、タイ
ミングをとってレジストローラ対２０で感光体１１の上
側に搬送する。感光体１１は、矢示する反時計方向に駆
動し、その際、帯電器１２によって感光体１１の表面を
一様に帯電し、光書込み器１７からのレーザ光を照射し
て感光体１１上に静電潜像を形成する。この潜像は、現
像器１３位置を通るときトナーによって可視像化する。
その可視像のトナ−濃度は、感光体１１の表面と対向す
る位置に設けたフォトセンサ２１によって検知する。Then, the sheet sent out from the sheet feeding cassette 18 in the direction of arrow A by the sheet feeding roller 19 is conveyed to the upper side of the photoconductor 11 by the registration roller pair 20 at a timing. The photoconductor 11 is driven in the counterclockwise direction indicated by the arrow, and at that time, the surface of the photoconductor 11 is uniformly charged by the charger 12, and the laser beam from the optical writer 17 is irradiated onto the photoconductor 11. An electrostatic latent image is formed on. This latent image is visualized by toner when passing through the position of the developing device 13.
The toner density of the visible image is detected by a photo sensor 21 provided at a position facing the surface of the photoconductor 11.
【００１３】この可視像は、感光体１１の上側に搬送さ
れてきたシートの下面に転写器１４により転写する。そ
して、画像転写後のシートを定着器２２に送り、定着器
２２の定着ロ−ラ２３と加圧ロ−ラ２４間を通してこの
シ−ト上の転写画像を定着する。そして、定着器２２を
出たシートは、さらに排紙ローラ２５によって搬送して
排紙トレイ２６上に排出する。一方、可視像転写後の感
光体１１はクリーニング器１５によって残留トナ−を除
去する。This visible image is transferred by the transfer device 14 to the lower surface of the sheet conveyed to the upper side of the photoconductor 11. Then, the sheet after the image transfer is sent to the fixing device 22, and the transferred image on the sheet is fixed through a space between the fixing roller 23 and the pressure roller 24 of the fixing device 22. Then, the sheet exiting the fixing device 22 is further conveyed by the paper discharge rollers 25 and discharged onto the paper discharge tray 26. On the other hand, the residual toner on the photoconductor 11 after the transfer of the visible image is removed by the cleaning device 15.
【００１４】ところで、装置本体１０にフォトセンサ２
１を設ける。一方、プロセスカ−トリッジ１６のケ−シ
ング１６ａには、フォトセンサ２１側の面に発泡ウレタ
ンよりなるパッド状のクリーニング部材２７を取り付け
る。By the way, the photo sensor 2 is attached to the apparatus main body 10.
1 is set. On the other hand, on the casing 16a of the process cartridge 16, a pad-like cleaning member 27 made of urethane foam is attached to the surface on the photosensor 21 side.
【００１５】そして、プロセスカ−トリッジ１６を交換
するため、図２に示すように、装置本体１０の上カバ−
１０ａを開いて着脱するとき、クリーニング部材２７を
フォトセンサ２１に、図３にも示すように、接触してフ
ォトセンサ２１を清掃する。Then, in order to replace the process cartridge 16, as shown in FIG. 2, the upper cover of the apparatus main body 10 is replaced.
When opening and detaching 10a, the cleaning member 27 is brought into contact with the photo sensor 21 to clean the photo sensor 21, as shown in FIG.
【００１６】前記実施例においては、クリーニング部材
２７をケ−シング１６ａへ直接取り付けてフォトセンサ
２１のみを清掃するものを示したが、更に、プロセスカ
−トリッジ１６を取り付けたときに、そのクリーニング
部材２７が定着ロ−ラ２３の周面に押し当たるようにし
てもよい。In the above-mentioned embodiment, the cleaning member 27 is directly attached to the casing 16a to clean only the photosensor 21, but the cleaning member is also attached when the process cartridge 16 is attached. Alternatively, 27 may be pressed against the peripheral surface of the fixing roller 23.
【００１７】即ち、図４に示すように、プロセスカ−ト
リッジ１６の幅と略同じ長さで略コ字状断面を有する部
材よりなる支持台２８を、その一方の側端で支軸２９に
よりケ−シング１６ａに回動自在に取り付け、他方の側
端は、図５に示すように、外方へ直角に折り曲げて係合
縁２８ａを形成する。That is, as shown in FIG. 4, a support base 28 made of a member having substantially the same width as the width of the process cartridge 16 and a substantially U-shaped cross section is provided with a support shaft 29 at one side end thereof. The casing 16a is rotatably attached, and the other side end is bent outward at a right angle to form an engaging edge 28a, as shown in FIG.
【００１８】また、ケ−シング１６ａの上面に先端を支
持台２８側へ直角に折り曲げた係合部１６ｃを係合縁２
８ａと平行に突設する。その係合部１６ｃを係合縁２８
ａと係合して支持台２８が支軸２９を中心として外側へ
回動する範囲を制限する。支持台２８とケ−シング１６
ａの外面との間には、付勢ばね３０を設けて支持台２８
を外方に向けて付勢する。その支持台２８の突出する外
側中央の面にその長さ方向にわたってクリーニング部材
２７を取り付ける。Further, an engaging portion 16c having a tip bent at a right angle to the support base 28 side is provided on the upper surface of the casing 16a, and an engaging edge 2 is formed.
Projected parallel to 8a. The engaging portion 16c is connected to the engaging edge 28.
The range in which the support base 28 engages with a and rotates outward about the support shaft 29 is limited. Support base 28 and casing 16
A biasing spring 30 is provided between the outer surface of a and the support base 28.
Is urged toward the outside. The cleaning member 27 is attached to the protruding outer center surface of the support base 28 in the lengthwise direction.
【００１９】そして、プロセスカ−トリッジ１６を取り
付けるときには、その過程でクリーニング部材２７をフ
ォトセンサ２１に接触してそれを清掃する。また、プロ
セスカ−トリッジ１６の取り付けが完了したときには、
図６に示すように、クリーニング部材２７が定着ロ−ラ
２３の周面に押し当たる。このとき、付勢ばね３０の付
勢力により支持台２８を外方に回動してクリーニング部
材２７を係合部１６ｃと係合縁２８ａとの係合の範囲内
で定着ロ−ラ２３に弾発的に押し当ててそれを清掃す
る。When the process cartridge 16 is attached, the cleaning member 27 is brought into contact with the photo sensor 21 to clean it in the process. Also, when the process cartridge 16 is completely attached,
As shown in FIG. 6, the cleaning member 27 is pressed against the peripheral surface of the fixing roller 23. At this time, the support base 28 is rotated outward by the urging force of the urging spring 30, and the cleaning member 27 is urged to the fixing roller 23 within the range of engagement between the engaging portion 16c and the engaging edge 28a. Clean it by pushing it spontaneously.
【００２０】[0020]
【発明の効果】従って、請求項１に記載のものによれ
ば、装置本体にプロセスカ−トリッジを着脱するとき、
クリーニング部材をフォトセンサに接触してそれを清掃
するので、プロセスカ−トリッジの交換とともにフォト
センサの清掃が定期的に確実に行われて常に良好な画像
が得られる。Therefore, according to the first aspect of the present invention, when the process cartridge is attached to or detached from the apparatus main body,
Since the cleaning member is brought into contact with the photo sensor to clean it, the cleaning of the photo sensor is regularly and reliably performed along with the replacement of the process cartridge, and a good image is always obtained.
【００２１】また、請求項２に記載のものによれば、更
に、装置本体にプロセスカ−トリッジを取り付けたとき
にクリーニング部材を定着器の定着部材の周面に押し当
てるので、定着部材の表面に付着するトナ−を清掃す
る。また、プロセスカ−トリッジの交換とともにクリー
ニング部材も交換されて定着器の定着性能の低下を防止
することができる。また、フォトセンサのクリーニング
部材と定着部材のクリーニング部材とを１つのクリーニ
ング部材で兼ねるので低コストとすることができる。Further, according to the second aspect of the present invention, since the cleaning member is pressed against the peripheral surface of the fixing member of the fixing device when the process cartridge is attached to the main body of the apparatus, the surface of the fixing member. Clean the toner attached to the. Further, the cleaning member is also replaced with the replacement of the process cartridge, so that the fixing performance of the fixing device can be prevented from being deteriorated. Further, since the cleaning member for the photo sensor and the cleaning member for the fixing member are combined into one cleaning member, the cost can be reduced.
【図１】この発明の一実施例であるレ−ザプリンタの概
略構成図である。FIG. 1 is a schematic configuration diagram of a laser printer which is an embodiment of the present invention.
【図２】そのプロセスカ−トリッジの交換状態を示す説
明図である。FIG. 2 is an explanatory diagram showing a replacement state of the process cartridge.
【図３】そのフォトセンサとクリーニング部材の接触状
態を示す部分拡大図である。FIG. 3 is a partially enlarged view showing a contact state between the photo sensor and the cleaning member.
【図４】この発明の他の実施例におけるプロセスカ−ト
リッジの外観を示す斜視図である。FIG. 4 is a perspective view showing an appearance of a process cartridge according to another embodiment of the present invention.
【図５】その定着ロ−ラとクリーニング部材の接触状態
を示す部分拡大図である。FIG. 5 is a partially enlarged view showing a contact state between the fixing roller and the cleaning member.
【図６】そのプロセスカ−トリッジの取付状態を示すレ
−ザプリンタの全体概略構成図である。FIG. 6 is an overall schematic configuration diagram of a laser printer showing a mounting state of the process cartridge.
１０ 装置本体 １１ 感光体 １６ プロセスカ−トリッジ ２１ フォトセンサ ２２ 定着器 ２３ 定着ロ−ラ（定着部材） ２４ 加圧ロ−ラ（加圧部材） ２７ クリーニング部材 10 Device Main Body 11 Photoreceptor 16 Process Cartridge 21 Photo Sensor 22 Fixer 23 Fixing Roller (Fixing Member) 24 Pressure Roller (Pressurizing Member) 27 Cleaning Member
Claims (2)
を配置して前記感光体とそれら電子写真プロセス手段の
いくつかをユニット化してプロセスカ−トリッジを構成
し、そのプロセスカ−トリッジを装置本体に対して着脱
自在とする一方、前記感光体上のトナ−濃度を検知する
フォトセンサを備える電子写真装置において、前記プロ
セスカ−トリッジの着脱時に前記フォトセンサに接触し
てそれを清掃するクリーニング部材を、該プロセスカ−
トリッジに設けてなる、電子写真装置。1. A process cartridge is constructed by arranging an electrophotographic process means around a photoconductor to unitize the photoconductor and some of the electrophotographic process means, and the process cartridge is formed. An electrophotographic apparatus having a photosensor for detecting the toner density on the photoconductor while being detachable, a cleaning member for contacting and cleaning the photosensor when the process cartridge is attached or detached. The process card
An electrophotographic device provided in the ridge.
感光体上に形成した画像をシ−トに転写して後、そのシ
−トを定着器の定着部材と加圧部材間を通して該シ−ト
上の転写画像を定着する請求項１に記載の電子写真装置
において、前記プロセスカ−トリッジを前記装置本体に
取り付けたとき前記クリーニング部材を前記定着部材の
周面に押し当ててなる、電子写真装置。2. An image formed on the photoconductor by using the electrophotographic process means is transferred to a sheet, and the sheet is passed between a fixing member and a pressing member of a fixing device. The electrophotographic apparatus according to claim 1, wherein the transferred image on the printer is fixed, wherein the cleaning member is pressed against the peripheral surface of the fixing member when the process cartridge is attached to the apparatus main body. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4183148A JPH063878A (en) | 1992-06-17 | 1992-06-17 | Electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4183148A JPH063878A (en) | 1992-06-17 | 1992-06-17 | Electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH063878A true JPH063878A (en) | 1994-01-14 |
Family
ID=16130645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4183148A Pending JPH063878A (en) | 1992-06-17 | 1992-06-17 | Electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063878A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006091650A (en) * | 2004-09-27 | 2006-04-06 | Ricoh Co Ltd | Image forming apparatus and cartridge |
| US7167661B2 (en) | 2003-10-31 | 2007-01-23 | Kyocera Mita Corporation | Sensor cleaning mechanism for image forming device |
| KR100743818B1 (en) * | 2001-09-12 | 2007-07-30 | 마쯔시다덴기산교 가부시키가이샤 | Image coding method and image decoding method |
| US8364056B2 (en) | 2010-03-09 | 2013-01-29 | Brother Kogyo Kabushiki Kaisha | Image forming device having cleaning member for cleaning belt |
-
1992
- 1992-06-17 JP JP4183148A patent/JPH063878A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100743818B1 (en) * | 2001-09-12 | 2007-07-30 | 마쯔시다덴기산교 가부시키가이샤 | Image coding method and image decoding method |
| US7167661B2 (en) | 2003-10-31 | 2007-01-23 | Kyocera Mita Corporation | Sensor cleaning mechanism for image forming device |
| JP2006091650A (en) * | 2004-09-27 | 2006-04-06 | Ricoh Co Ltd | Image forming apparatus and cartridge |
| JP4562176B2 (en) * | 2004-09-27 | 2010-10-13 | 株式会社リコー | Image forming apparatus and cartridge |
| US8364056B2 (en) | 2010-03-09 | 2013-01-29 | Brother Kogyo Kabushiki Kaisha | Image forming device having cleaning member for cleaning belt |
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