JPS61264366A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS61264366A JPS61264366A JP60107721A JP10772185A JPS61264366A JP S61264366 A JPS61264366 A JP S61264366A JP 60107721 A JP60107721 A JP 60107721A JP 10772185 A JP10772185 A JP 10772185A JP S61264366 A JPS61264366 A JP S61264366A
- Authority
- JP
- Japan
- Prior art keywords
- developing device
- developing
- unit
- photosensitive drum
- roller
- 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
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は例えば二色カラー複写機に用いられる現象装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a phenomenon device used, for example, in a two-color color copying machine.
この種の現ｔＩ！装置は、感光体ドラム（＠担持体）に
対向して二種の現像器、すなわち例えば赤色の現像剤を
収容した現像器と、黒色の現像剤を収容した現像器とが
設けられ、オペレータによる選択切換操作により、その
いずれか一方の現像器が駆動されて所定の現像が行なわ
れるが、非駆動側の現像器が感光体ドラムに近接して配
置していると、その現像器の現像剤が不用意に感光体ド
ラムに付着して用命状態に悪影響を及ぼしてしまう。こ
のため従来においては、現像器を個々に組込み、これら
現像器にそれぞれ退ＭＷ＆構を設け、これら退避機構に
より非駆動側の現像器を感光体ドラムから退避させるよ
うにしている。This kind of current tI! The apparatus is provided with two types of developing devices facing the photosensitive drum (@carrier), namely, a developing device containing a red developer and a developing device containing a black developer. By the selection switching operation, one of the developing devices is driven to perform the prescribed development, but if the non-driven developing device is located close to the photoreceptor drum, the developer of that developing device is may inadvertently adhere to the photoreceptor drum and adversely affect its operational status. For this reason, conventionally, developing units are individually assembled, each of these developing units is provided with a retracting MW & mechanism, and the retracting mechanism is used to retract the developing unit on the non-driving side from the photosensitive drum.
しかしながらこのような手段では、各現像器に個々に退
ａ機構を設けなくてはならないから、構成が複雑となり
、高価で大型になってしまう難点があった。However, with such means, each developing unit must be provided with an individual retracting mechanism, resulting in a complicated structure, high cost, and large size.
本発明はこのような点に春目してなされたちので、その
目的とするところは、簡単な構成で、非駆動側の現像器
を的確に退避させて常に良好な現像処理を図ることがで
きるようにした現（ｇ！装置を提供することにある。The present invention has been developed with these points in mind, and its purpose is to have a simple configuration, and to accurately evacuate the non-driving side developing device to ensure good development processing at all times. Our objective is to provide a current (g!
（発明の概要〕
すなわち本発明は、像担持体に対向して第１および第２
の現像器を設け、これら現像器のいずれか一方を選択的
に駆動してその現像器の現像剤で上記像担持体上の潜像
を現像するものにおいて、上記第１および第２の現像器
を一体的に組合わして単一の現像器ユニットとして構成
し、この現像器ユニットを上記像担持体と接離する方向
に回動可能に支持し、この現像器ユニットを作ａｍ構を
介して回動し、駆動側の現像器を像担持体に近接させ、
非駆動側の現像器を像担持体から退避させ、この状態で
駆動側の現像器で現像を行なうようにしたものである。(Summary of the Invention) That is, the present invention provides first and second
The first and second developing devices are provided with a developing device, and one of the developing devices is selectively driven to develop the latent image on the image carrier with the developer of the developing device, wherein the first and second developing devices are integrally combined to form a single developing device unit, this developing device unit is rotatably supported in the direction of approaching and separating from the image carrier, and this developing device unit is connected through an am mechanism. rotate to bring the driving side developing device close to the image carrier,
The developing device on the non-driving side is retracted from the image carrier, and in this state, the developing device on the driving side performs development.
以下、本発明の一実施例について図面を参照して説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
図中１は二色カラー複写機の本体で、この本体１の上部
に原稿台２が設けられ、この原稿台２の下方側に露光光
学装Ｍ３を構成するランプ等の光源３ａ、ミラーＭｌ〜
Ｍｓ 、レンズ３ｂ等が設けられている。また本体１内
の略中央部に像担持体として感光体ドラム４が回転駆動
可能に設けられているとともに、この感光体ドラム４の
周囲にその回転方向に向かって順に帯電装置５、二色カ
ラー現像用の第１および第２の現像器６．７、さらに転
写装置８、クリーニング装置９、除電装置１０等が配設
されている。In the figure, reference numeral 1 denotes a main body of a two-color color copying machine, and an original table 2 is provided on the upper part of this main body 1. On the lower side of this original table 2, a light source 3a such as a lamp that constitutes an exposure optical device M3, mirrors Ml to
Ms, a lens 3b, etc. are provided. Further, a photoreceptor drum 4 is rotatably provided as an image carrier approximately in the center of the main body 1, and around the photoreceptor drum 4, a charging device 5, a two-color color First and second developing devices 6.7 for development, a transfer device 8, a cleaning device 9, a static eliminator 10, and the like are provided.
本体１の下部一方側には、上記感光ドラム４の外周下側
の転写部位にこの感光ドラム４の回転に同期して被転写
部材であるコピー用紙Ｐを供給する給紙装置１１が設け
られ、また他方側には搬送ベルト１２が設けられ、この
搬送ベルト１２の搬送方向先端部に定着装置１３が、さ
らにその先に一対の排紙ローラ１４および本体１の外部
に突出して排紙トレー１５がそれぞれ設けられている。A paper feeding device 11 is provided on one side of the lower part of the main body 1, and supplies a copy paper P, which is a transfer target member, to a transfer site below the outer periphery of the photosensitive drum 4 in synchronization with the rotation of the photosensitive drum 4. Further, a conveyor belt 12 is provided on the other side, and a fixing device 13 is provided at the leading end of the conveyor belt 12 in the conveyance direction, and beyond that a pair of paper ejection rollers 14 and a paper ejection tray 15 protrude outside the main body 1. Each is provided.
なお１６は本体１の内部を冷却する冷却ファンである。Note that 16 is a cooling fan that cools the inside of the main body 1.
そして感光ドラム４は、これの回転に伴って、まず帯電
装置３により一様に帯電される。一方、原稿台２の上に
載置された原稿に対して、感光体ドラム４の回転と同期
しながら露光光学装置３の光源３ａがミラ〜Ｍ！と一体
的に移動してその原稿の画像を走査（スキャン）する。As the photosensitive drum 4 rotates, it is first uniformly charged by the charging device 3. On the other hand, the light source 3a of the exposure optical device 3 illuminates the original placed on the original platen 2 in synchronization with the rotation of the photosensitive drum 4. The scanner moves in unison with the scanner to scan the image of the document.
そしてこの画像の反射光が、ミラーＭ２ 、Ｍ３の移動
に基づいて光路長を一定に保ちながらレンズ３３ｂおよ
びミラーＭ４〜Ｍ６を介して上記光に帯電された状態の
感光体ドラム４の表面に導入され、これにより感光体ド
ラム４の表面に静電潜１象が形成される。The reflected light of this image is then introduced onto the surface of the photoreceptor drum 4, which is charged with the light, via the lens 33b and the mirrors M4 to M6, while keeping the optical path length constant based on the movement of the mirrors M2 and M3. As a result, an electrostatic latent image is formed on the surface of the photoreceptor drum 4.
こののち現像器６．７のいずれか一方により現像剤が搬
送供給されて所定の現像が行なわれ、感光体ドラム４上
の静電潜像が可視像化される。Thereafter, the developer is transported and supplied by either one of the developing devices 6 and 7 to carry out predetermined development, and the electrostatic latent image on the photosensitive drum 4 is visualized.
この状態でさらに感光体ドラム４の回転が進み、これと
同期して給紙装置４１から送り込まれるコピー用紙Ｐに
上記転写装置３８の動作で感光体ドラム４上の画像（ト
ナー像）が転写される。、このようにして画像が転写さ
れたコピー用ＭＰは感光体ドラム４の表面から分離され
て搬送ベルト１２により定着装置１３に送られ、ここで
画像が定着され、こののち排紙ローラ１４により排紙ト
レー１５に送り出される。In this state, the rotation of the photoreceptor drum 4 further progresses, and in synchronization with this, the image (toner image) on the photoreceptor drum 4 is transferred to the copy paper P fed from the paper feeder 41 by the operation of the transfer device 38. Ru. The copying MP onto which the image has been transferred in this way is separated from the surface of the photosensitive drum 4 and sent to the fixing device 13 by the conveyor belt 12, where the image is fixed, and then ejected by the paper ejecting roller 14. The paper is sent out to the paper tray 15.
一方、コピー用紙Ｐへの画像転写後の感光体ドラム４は
クリーニング装置９により残留現像剤の除去清掃が行な
われ、ざらに除電装置１０により除電されて一定レベル
以下に電位が下げられて、次の複写動作に備える。On the other hand, after the image has been transferred to the copy paper P, the photoreceptor drum 4 is cleaned to remove residual developer by the cleaning device 9, and is roughly neutralized by the static eliminator 10 to lower the potential below a certain level. Prepare for the copy operation.
このような二色カラー複写機における給紙装置１１は次
のように構成されている。すなわち、本体１内の一端側
下部に上下二段にカセット収納部２０ａ、２０ｂが設け
られ、この各カセット収納部２０ａ、２０ｂに収納用紙
サイズを８５とＡ４等に異にした給紙カセット２１ａ、
２１ｂが挿脱可能にセットされ、かつこれら給紙カセッ
ト２１ａ。The paper feeding device 11 in such a two-color copying machine is constructed as follows. That is, cassette storage sections 20a and 20b are provided in two stages, upper and lower, in the lower part of one end side of the main body 1, and each of the cassette storage sections 20a and 20b has paper feed cassettes 21a and 21a with different paper sizes stored therein, such as 85 and A4.
21b is removably set, and these paper feed cassettes 21a.
２１ｂの各上方側に回転駆動可能に自動給紙ローラ２２
ａ、２２ｂが設けられて自動給紙部が構成されている。An automatic paper feed roller 22 is rotatably mounted on each upper side of the paper feed roller 21b.
a and 22b are provided to constitute an automatic paper feeding section.
そして自動給紙部の上方側に手差し給紙口２３が設けら
れ、その内方部に手差し給紙ロー５２４が回転駆動可能
に設けられている。なお上記自動給紙部の上段側の給紙
カセット２１ａの自動給紙ローラ２２ａは給紙動作中以
外は手差し給紙ローラ２４よりも上方に退避させである
。A manual paper feed port 23 is provided above the automatic paper feed section, and a manual paper feed row 524 is rotatably provided inside the manual paper feed port 23. Note that the automatic paper feed roller 22a of the paper feed cassette 21a on the upper stage side of the automatic paper feed section is retracted above the manual paper feed roller 24 except during paper feeding operation.
また上段側の給紙カセット２１ａのセット位置内実部に
手差し給紙用も兼ねた一対の搬送ローラ２５が回転駆動
可能に設けられ、下段側の給紙カセット２１ｂのセット
位置内実部にも一対の搬送ロー５２６が回転駆動可能に
設けられている。これら各一対ずつの搬送ローラ２５．
２６のさらに内方に、搬送路２７を構成する板状の搬送
ガイド２７ａ、２７ｂ、２７ｃが設けられている。この
搬送路２７の内方端部には一対のレジストロー５２８が
回転駆動可能に設けられているとともに、このレジスト
ロー５２８と感光体ドラム４の外周の下側転写部位との
間に搬送ガイド２９が設けられている。In addition, a pair of transport rollers 25 that also serve as manual paper feed are rotatably provided in the inner part of the set position of the upper paper feed cassette 21a, and a pair of transport rollers 25 are rotatably provided in the inner part of the set position of the lower paper feed cassette 21b. A transport row 526 is provided so as to be rotatable. Each pair of transport rollers 25.
Further inward of 26, plate-shaped conveyance guides 27a, 27b, and 27c that constitute the conveyance path 27 are provided. A pair of registration rows 528 are rotatably provided at the inner end of the transport path 27, and a transport guide 29 is provided between the registration rows 528 and a lower transfer region of the outer periphery of the photoreceptor drum 4. is provided.
そして、このような給紙装置１１はオペレータによる用
紙サイズの選択や自動或いは手差し給紙の選択等により
、それに対応した給紙ローラ（２２ａ、２２ｂ、２４の
うち）−ツ）が給紙動作を行なう。例えば、Ｂ５サイズ
を選択した場合、上段側の自動給紙ローラ２２ａが下降
して回転し、上段側の給紙カセット２１ａ内の８５サイ
ズのコピー用紙Ｐを最上層から一枚ずつ繰り出して搬送
ローラ２５Ｍに送る。またＡ４サイズを選択した場合、
下段側の自動給紙ローラ２２ｂが回転し、下段側の給紙
力セラ１〜２１ｂ内のＡ４サイズのコピー用紙Ｐを最上
層から一枚ずつ繰り出して搬送ローラ２６間に送る。一
方、手差しの場合は手差し給紙ローラ２４が回転し、手
差し給紙口２３から挿入されたコピー用紙Ｐを搬送ロー
ラ５５間に送る。In such a paper feeding device 11, when an operator selects a paper size or selects automatic or manual paper feeding, the corresponding paper feeding roller (out of 22a, 22b, 24) performs a paper feeding operation. Let's do it. For example, when B5 size is selected, the upper automatic paper feed roller 22a descends and rotates, and the 85 size copy paper P in the upper paper feed cassette 21a is fed out sheet by sheet from the top layer, and the conveyance roller Send to 25M. Also, if you select A4 size,
The automatic paper feed roller 22b on the lower stage rotates, and the A4 size copy sheets P in the paper feed force rollers 1 to 21b on the lower stage are fed one by one from the top layer and sent between the conveyance rollers 26. On the other hand, in the case of manual paper feed, the manual paper feed roller 24 rotates and feeds the copy paper P inserted from the manual paper feed slot 23 between the conveyance rollers 55 .
このように供給したコピー用紙Ｐを搬送ローラ２５また
は２６の回転により搬送路２７に搬送し、その搬送ガイ
ド２７ａと２７ｂ１または２７ｔ）と２７ｃで案内して
レジストロー５２８に到達させ、そのレジストロー５２
８により一時整位して感光体ドラム４の回転と同期すべ
くタイミングを取り搬送ガイド２９で案内して感光体ド
ラム４の外周下側の転写部に送り込む。The copy paper P supplied in this way is conveyed to the conveyance path 27 by the rotation of the conveyance rollers 25 or 26, guided by the conveyance guides 27a, 27b1 or 27t) and 27c, and made to reach the registration straw 528.
8, the photoreceptor drum 4 is temporarily aligned and guided by the conveyance guide 29 at a timing synchronized with the rotation of the photoreceptor drum 4, and sent to the transfer section on the lower side of the outer circumference of the photoreceptor drum 4.
第１および第２の現像器６．７は、第２図および第３図
に示すように、その両者の両端に配置するホルダ３０に
より一体に組合わされ、単一の現像器ユニット３１とし
て構成されている。そしてホルダ３０の中央部に支軸３
２が貫挿固着され、この支軸３２を介して現像器ユニッ
ト３１が回動可能に支持されている。支軸３２の一端に
はアーム３３が固着され、このアーム３３の一端にＵ字
状の係合溝３４が切欠形成されている。３５は作動機構
を構成するモータで、このモータ３５の回転軸に偏心カ
ム３６が取付けられ、この偏心カム３６が上記アーム３
３の係合溝３４に係合し、モータ３５の起動により偏心
カム３６が偏心回転し、これに応じてアーム３３が支軸
３２を中心に揺動し、この揺動により支軸３２と一体に
現像器ユニット３１が回動するようになっている。As shown in FIGS. 2 and 3, the first and second developing devices 6.7 are combined into a single developing device unit 31 by holders 30 disposed at both ends thereof. ing. The support shaft 3 is attached to the center of the holder 30.
2 is inserted and fixed therethrough, and a developing unit 31 is rotatably supported via this support shaft 32. An arm 33 is fixed to one end of the support shaft 32, and a U-shaped engagement groove 34 is cut out at one end of the arm 33. Reference numeral 35 denotes a motor constituting the operating mechanism, and an eccentric cam 36 is attached to the rotating shaft of this motor 35, and this eccentric cam 36 is connected to the arm 3.
When the motor 35 starts, the eccentric cam 36 rotates eccentrically, and the arm 33 swings around the support shaft 32 in response to this, and this swing causes the arm 33 to become integral with the support shaft 32. The developing unit 31 is configured to rotate.
第１および第２の現像器６．７は、それぞれケーシング
４０内に現像ロー５４１を設けてなり、一方の上段側の
ケーシング４０には例えば赤色の現像剤［）ａが、また
他方の下段側のケーシング４０には例えば黒色の現像剤
Ｄｂがそれぞれ収容されている。なお、これら現像剤ｏ
ａ、ｏｂはトナーとキャリアとからなる二成分現像剤で
ある。The first and second developing units 6.7 are each provided with a developing row 541 in a casing 40, and the upper casing 40 of one is filled with, for example, a red developer [)a, and the lower casing 40 of the other is filled with a red developer [)a. For example, a black developer Db is housed in each of the casings 40 . In addition, these developers o
a and ob are two-component developers consisting of toner and carrier.
各現像ローラ４１は、マグネットローラ４２と、このマ
グネットローラ４２の外周に嵌合され時計方向に回転す
る回転スリーブ４３とからなり、マグネットローラ４２
はその周面に均等に複数の磁極部を有し、これら磁慟部
の作用で回転スリーブ４３の外周面に現像剤Ｄａ （１
）ｂ）による磁気ブラシが形成されるようになっている
。なお、４５は各ケーシング４０内に設けられた現像剤
撹拌体、４６は瑛象ローラ４１上の現像剤を掻き落すス
フレイバー、４７はトナーを補給する補給ローうである
。Each developing roller 41 consists of a magnet roller 42 and a rotating sleeve 43 that is fitted around the outer periphery of the magnet roller 42 and rotates clockwise.
has a plurality of magnetic pole parts evenly distributed on its circumferential surface, and due to the action of these magnetic pole parts, developer Da (1
) A magnetic brush is formed according to b). In addition, 45 is a developer agitating body provided in each casing 40, 46 is a souffle flavor that scrapes off the developer on the image roller 41, and 47 is a replenishment row that replenishes toner.
本体１内には、第４図ないし第６図に示すように、モー
タ（図示せず）に連動する駆動ギヤー５０が設けられ、
この駆動ギヤー５０に第１および第２の現像器６．７に
対応して設けられた一対の連動ギヤー５１が噛合し、第
１および第２の現機器６．７の各マグネットローラ４１
にこれら連動ギヤー５１に係脱自在な係脱ギヤー５２が
設けられている。Inside the main body 1, as shown in FIGS. 4 to 6, a drive gear 50 that is interlocked with a motor (not shown) is provided.
A pair of interlocking gears 51 provided corresponding to the first and second developing devices 6.7 mesh with this driving gear 50, and each magnet roller 41 of the first and second developing devices 6.7
An engagement/disengagement gear 52 that can be freely engaged and disengaged from these interlocking gears 51 is provided.
しかして、現像動作の待機時においては、第４図に示す
ように、各現像器６．７の現像ローラ４１と感光体ドラ
ム４との間の隙間Ｌ１゜Ｌ２がほぼ同等の幅に保たれ、
また各マグネットローラ４２の磁極部の相互間中間部が
感光体ドラム４に対向するように配置していて、この状
態からオペレータの操作により例えば第１の現像器６が
選択されると、現像器ユニット３１がモータ３５の起動
に基づいて反時計方向に回動し、第５図に示すように、
第１の現像器６の現像ローラ４１が感光体ドラム４に近
接して対向し、第２の現像器７の現像ロー５４１が感光
体ドラム４から大きく離間して退避し、これにより第１
の現像器６による現像が可能な状態になる。また、現像
器ユニット３１の回動に応じて、第１の現像器６の係脱
ギヤー５２が一方の連動ギヤー５１に係合して噛合し、
これにより駆動ギヤー５０の駆動に基づいてマグネット
ローラ４２が回転し、その現像用のｌａ磁極部感光体ド
ラム４に対向するように配置し、この状態において回転
スリーブ４３が回転し、その外周の磁気ブラシのトナー
により、感光体ドラム４上の静Ｎｍ像が現象され可視像
化される。この際、第２の現像器７の現像ローラ４１は
感光体ドラム４から大きく離間して退避しているから、
この現像ロー５４１上の現象剤Ｄｂが不用意に感光体ド
ラム４に付着するようなことがなく、したがって第１の
現像器６で的確な現像を行なうことができる。Therefore, during standby for the developing operation, as shown in FIG. 4, the gaps L1 and L2 between the developing roller 41 and the photosensitive drum 4 of each developing device 6.7 are maintained at approximately the same width. ,
Further, the intermediate portion between the magnetic pole portions of each magnet roller 42 is arranged so as to face the photoreceptor drum 4, and when the operator selects, for example, the first developing device 6 from this state, the developing device The unit 31 rotates counterclockwise based on the activation of the motor 35, as shown in FIG.
The developing roller 41 of the first developing device 6 is close to and facing the photosensitive drum 4, and the developing roller 541 of the second developing device 7 is moved away from the photosensitive drum 4 by a large distance.
The developing device 6 becomes ready for development. Further, in accordance with the rotation of the developer unit 31, the engagement/disengagement gear 52 of the first developer 6 engages and meshes with one of the interlocking gears 51.
As a result, the magnet roller 42 rotates based on the drive of the drive gear 50, and is disposed so as to face the la magnetic pole photosensitive drum 4 for development.In this state, the rotating sleeve 43 rotates, and the magnetic The static Nm image on the photoreceptor drum 4 is transformed into a visible image by the toner of the brush. At this time, since the developing roller 41 of the second developing device 7 is retracted and separated from the photosensitive drum 4,
The developing agent Db on the developing row 541 does not inadvertently adhere to the photosensitive drum 4, so that the first developing device 6 can perform accurate development.
一方、オペレータにより第２の現像器７が選択された場
合には、第６図に示すように、現像器ユニット３１が時
計方向に回動し、上述とは逆に、第２の現像器７の現像
ローラ４１が感光体ドラム４に近接して対向するととも
に、第１の現像器６の現像ローラ４１が感光体ドラム４
から大きく離間して退避し、また第２の現像器７の係脱
ギヤー５２が他方の連動ギヤー５１に噛合してマグネッ
トローラ４２の現象剤の磁極部が感光体ドラム４に対向
するように配置され、静電潜象に対する現像が行なわれ
る。On the other hand, when the second developing device 7 is selected by the operator, the developing device unit 31 rotates clockwise as shown in FIG. The developing roller 41 of the first developing device 6 faces the photosensitive drum 4 in close proximity to the photosensitive drum 4, and the developing roller 41 of the first developing device 6 faces the photosensitive drum 4.
The connecting/disengaging gear 52 of the second developing device 7 meshes with the other interlocking gear 51, and the magnetic pole portion of the developing agent of the magnet roller 42 is arranged so as to face the photosensitive drum 4. The electrostatic latent image is then developed.
（発明の効果）
以上説明したように本発明によれば、第１および第２の
現像器を一体的に組合わして単一の現像器ユニットとし
て構成し、この現像器ユニットを像担持体と接離する方
向に回動可能に°支持し、この現像器ユニットを作動機
構を介して回動し、駆動側の現像器を像担持体に近接さ
せ、非駆動側の現像器を像担持体から退避さゼ、この状
態で駆動側の現像器で現像を行なうようにしたから、従
来のように第１および第２の現像器に個々に退避機構を
設ける必要がなく、したがって構成が簡単となり、安価
で小型の現像装置を提供することができるという効果を
奏する。(Effects of the Invention) As explained above, according to the present invention, the first and second developing devices are integrally combined to form a single developing device unit, and this developing device unit is combined with the image carrier. The developing device unit is supported so as to be rotatable in the direction of approaching and separating, and the developing device unit is rotated via an operating mechanism to bring the driving side developing device close to the image carrier, and the non-driving side developing device to move close to the image carrier. Since the developing unit on the drive side performs development in this state, there is no need to provide separate retracting mechanisms for the first and second developing units as in the past, and the configuration is therefore simplified. , it is possible to provide an inexpensive and compact developing device.
図面は本発明の一実施例を示し、第１図は二色カラー複
写機の概略的構成図、第２図は現像器ユニットの断面図
、第３図は同じく斜視図、第４図は現像器ユニットの現
像待機時の状態を示す断面図、第５図は現像器ユニット
の一方の現像器における現像時の状態を示す断面図、第
６図は同じく他方の現像器における現像時の状態を示す
断面図である。
４・・・感光体ドラム（像担持体）、６．７・・・現像
器、３１・・・現像器ユニット。The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of a two-color color copying machine, Fig. 2 is a sectional view of a developing unit, Fig. 3 is a perspective view thereof, and Fig. 4 is a developing unit. FIG. 5 is a cross-sectional view showing the state of one developing device in the developing unit during development, and FIG. 6 similarly shows the state of the other developing device during development. FIG. 4... Photosensitive drum (image carrier), 6.7... Developer, 31... Developer unit.
Claims (1)
れら現像器のいずれか一方を選択的に駆動してその現像
器の現像剤で上記像担持体上の潜像を現像するものにお
いて、上記第１および第２の現像器を一体的に組合わし
て単一の現像器ユニットとして構成し、この現像器ユニ
ットを上記像担持体と接離する方向に回動可能に支持し
、この現像器ユニットを作動機構を介して回動し、駆動
側の現像器を像担持体に近接させ、非駆動側の現像器を
像担持体から退避させることを特徴とした現像装置。First and second developing devices are provided opposite to the image carrier, and one of these developing devices is selectively driven to develop the latent image on the image carrier with the developer of the developing device. The first and second developing devices are integrally combined to form a single developing device unit, and the developing device unit is supported so as to be rotatable in a direction toward and away from the image carrier. , a developing device characterized in that the developing device unit is rotated via an operating mechanism to bring the developing device on the driving side close to the image carrier and to retract the developing device on the non-driving side from the image carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60107721A JPS61264366A (en) | 1985-05-20 | 1985-05-20 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60107721A JPS61264366A (en) | 1985-05-20 | 1985-05-20 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61264366A true JPS61264366A (en) | 1986-11-22 |
Family
ID=14466261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60107721A Pending JPS61264366A (en) | 1985-05-20 | 1985-05-20 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61264366A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6211880A (en) * | 1985-07-09 | 1987-01-20 | Mita Ind Co Ltd | Developing device for electrophotography |
| JPS6227774A (en) * | 1985-07-27 | 1987-02-05 | Mita Ind Co Ltd | Electrophotographic developing device |
| JPS63278073A (en) * | 1987-05-09 | 1988-11-15 | Ricoh Co Ltd | Developing device in image forming device |
| JPS63301070A (en) * | 1987-05-31 | 1988-12-08 | Ricoh Co Ltd | Developing device |
| JPH02250068A (en) * | 1989-03-23 | 1990-10-05 | Toshiba Corp | Electrifier output adjusting device for image forming device |
-
1985
- 1985-05-20 JP JP60107721A patent/JPS61264366A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6211880A (en) * | 1985-07-09 | 1987-01-20 | Mita Ind Co Ltd | Developing device for electrophotography |
| JPS6227774A (en) * | 1985-07-27 | 1987-02-05 | Mita Ind Co Ltd | Electrophotographic developing device |
| JPS63278073A (en) * | 1987-05-09 | 1988-11-15 | Ricoh Co Ltd | Developing device in image forming device |
| JPS63301070A (en) * | 1987-05-31 | 1988-12-08 | Ricoh Co Ltd | Developing device |
| JPH02250068A (en) * | 1989-03-23 | 1990-10-05 | Toshiba Corp | Electrifier output adjusting device for image forming device |
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