JPS6271985A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS6271985A JPS6271985A JP21312485A JP21312485A JPS6271985A JP S6271985 A JPS6271985 A JP S6271985A JP 21312485 A JP21312485 A JP 21312485A JP 21312485 A JP21312485 A JP 21312485A JP S6271985 A JPS6271985 A JP S6271985A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- developer
- roller
- sleeve
- toner
- 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
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
電子写真装置や、静電記録装置に用いられる現像装置で
あって、特に潜像担持体と現像ローラが対向する現像領
域に非磁性トナーのみを選択的に搬送できるようにし、
現像剤収容容器内に潜像担持体に付着せずに搬送されて
きたトナーが外部に漏れないようにした現像装置。[Detailed Description of the Invention] [Summary] A developing device used in an electrophotographic device or an electrostatic recording device, which selectively applies only non-magnetic toner to a developing area where a latent image carrier and a developing roller face each other. make it possible to transport,
A developing device that prevents toner that has been transported into a developer storage container without adhering to a latent image carrier from leaking to the outside.
本発明は電子写真装置や、静電記録装置に用いられる現
像装置に係り、特に記録ドラムの周囲に形成されている
潜像担持体と現像ローラが対向する現像領域に非磁性ト
ナーのみを選択的に搬送できるようにし、かつ現像後、
現像剤収容容器内に搬送されてきた未現像のトナーが外
部に漏れないようにした現像装置に関する。The present invention relates to a developing device used in an electrophotographic device or an electrostatic recording device, and in particular, it selectively applies only non-magnetic toner to a developing area where a latent image carrier formed around a recording drum and a developing roller face each other. After development,
The present invention relates to a developing device that prevents undeveloped toner conveyed into a developer storage container from leaking to the outside.
セレン（Ｓｅ）等の光導電層よりなる潜像担持体を周囲
に形成した記録ドラムの前記担持体をコロナ放電器等を
用いて一様に帯電させた後、この潜像担持体に光を照射
して画像情報に対応する露光を行って静電潜像を形成す
る。更にこの静電潜像に磁気ブラシ現像器を用いてトナ
ーを付着させて現像を行う電子写真記録装置は、複写装
置等に広く利用されている。After uniformly charging the latent image carrier of the recording drum around which a latent image carrier made of a photoconductive layer such as selenium (Se) is formed using a corona discharger or the like, light is applied to the latent image carrier. An electrostatic latent image is formed by irradiating and performing an exposure corresponding to image information. Furthermore, electrophotographic recording devices that develop the electrostatic latent image by applying toner to it using a magnetic brush developer are widely used in copying devices and the like.
このような記録装置の現像装置に於いて非磁性トナーと
、磁性キャリアからなる二成分現像剤を用いて現像を行
う場合、特にカラーの記録を行う際、非磁性トナーのみ
が選択的に現像部に搬送されるようにして鮮明なカラー
記録が実施されるようにした現像装置が要望されている
。When developing using a two-component developer consisting of non-magnetic toner and magnetic carrier in the developing device of such a recording device, only the non-magnetic toner is selectively used in the developing area, especially when recording in color. There is a need for a developing device that is capable of carrying out clear color recording by being conveyed by the developer.
従来の二成分現像剤を用いる現像装置の模式図を第２図
に示す。A schematic diagram of a developing device using a conventional two-component developer is shown in FIG.
第２図に示すように従来の現像装置は、磁性粒子よりな
るキャリア１と非磁性の着色樹脂粉末よりなるトナー２
とから構成される現像剤３を収容する現像剤収容容器４
が記録ドラム１）に近接して設けられている。この現像
剤収容容器４内には、矢印六方向に回転する非磁性のス
リーブ５と、このスリーブ５内に内包され、矢印Ｂ方向
に示すようにスリーブ５の回転方向と逆方向に回転し、
複数の磁極を有する磁気ローラ６とよりなる現像ローラ
７が設けられている。As shown in FIG. 2, the conventional developing device consists of a carrier 1 made of magnetic particles and a toner 2 made of non-magnetic colored resin powder.
A developer storage container 4 containing a developer 3 comprising:
is provided close to the recording drum 1). Inside this developer storage container 4, there is a non-magnetic sleeve 5 that rotates in the six directions of arrows, and a non-magnetic sleeve 5 that is enclosed within this sleeve 5 and rotates in the opposite direction to the rotation direction of the sleeve 5 as shown in the direction of arrow B.
A developing roller 7 consisting of a magnetic roller 6 having a plurality of magnetic poles is provided.
また現像剤収容容器４には現像ローラフの表面に付着し
た現像剤３の穂の高さを所定の寸法に規制するための非
磁性の金属板等よりなる穂切りブレード８が設置され、
また現像されずに現像ローラフの表面に付着して収容容
器４に戻ってきた現像剤３を掻き取るための非磁性の樹
脂板等よりなる現像剤掻き取りブレード９が設けられて
いる。Further, a spike cutting blade 8 made of a non-magnetic metal plate or the like is installed in the developer storage container 4 to regulate the height of the spikes of the developer 3 attached to the surface of the developing roller to a predetermined size.
Further, a developer scraping blade 9 made of a non-magnetic resin plate or the like is provided for scraping off the developer 3 that has not been developed but has adhered to the surface of the developing roller rough and returned to the storage container 4.
このような現像装置の動作について説明すると、現像剤
収容容器４内に収容されている現像剤３は磁気ローラ６
の磁力によって、スリーブ５の表面に吸着される。ここ
で第３図に示すように磁気ローラ６は矢印Ｂ方向に沿っ
て回転し、スリーブ５は矢印Ａ方向に沿って回転してい
るとすると、トナー２とキャリア１とからなる現像剤３
の穂は、磁気ローラ６の回転に従って自転運動をしなが
ら、矢印Ａ方向に搬送される。To explain the operation of such a developing device, the developer 3 contained in the developer storage container 4 is moved by the magnetic roller 6.
It is attracted to the surface of the sleeve 5 by the magnetic force. Here, as shown in FIG. 3, assuming that the magnetic roller 6 rotates along the direction of arrow B and the sleeve 5 rotates along the direction of arrow A, developer 3 consisting of toner 2 and carrier 1
The ears of corn are conveyed in the direction of arrow A while rotating on their own axis according to the rotation of the magnetic roller 6.
前記した第２図に示すようにスリーブ５上で穂状に吸着
された現像剤３が、矢印Ａに示すスリーブ５の回転方向
に沿って移動し、現像剤収容容器４の出口に設けられた
穂切りブレード８によって、所定の厚さに規定され、更
に矢印Ａに沿って搬送される。そして潜像担持体１０が
表面に形成された記録ドラム１）に、前記搬送された現
像剤３が接触する現像領域で、記録ドラム１）上に形成
された静電潜像にトナー２が供給付着されて現像が行わ
れる。As shown in FIG. 2, the developer 3 adsorbed in the form of a spike on the sleeve 5 moves along the direction of rotation of the sleeve 5 shown by the arrow A, and moves to the spike provided at the outlet of the developer storage container 4. It is defined to a predetermined thickness by the cutting blade 8, and is further conveyed along arrow A. The toner 2 is then supplied to the electrostatic latent image formed on the recording drum 1) in the development area where the transported developer 3 comes into contact with the recording drum 1) on which the latent image carrier 10 is formed. It is attached and developed.
現像終了後の現像剤３は更に現像ローラ７上を搬送され
て現像収容容器４内に回収される。更に現像剤３は現像
剤掻き取りブレード９によって現像ローラ７より剥がさ
れ、図示しない攪拌手段により攪拌され、現像によって
消費された量のトナー２が補給され、その後前記したの
と同様な動作を現像装置が繰り返す。After the development is completed, the developer 3 is further conveyed on the developing roller 7 and collected into the developer storage container 4. Further, the developer 3 is peeled off from the developing roller 7 by a developer scraping blade 9, stirred by a stirring means (not shown), and the amount of toner 2 consumed by development is replenished, and then the same operation as described above is carried out for development. The device repeats.
ところが、このような現像装置では、現像剤のトナー濃
度が記録品位に与える影響が大きく、トナー濃度が高い
と背景部の地汚れを生じ、トナー濃度が低下すると画像
が薄くなったり、現像されなくなり、更にはキャリア１
の付着が起こる。However, in such a developing device, the toner concentration of the developer has a large effect on the recording quality, and when the toner concentration is high, background smudges occur in the background, and when the toner concentration decreases, the image becomes pale or is not developed. , and even carrier 1
adhesion occurs.
そのため、このような装置では、トナー濃度センサを設
けてトナー濃度を管理すると共に、トナー濃度に応じて
トナーの供給を行わねばならず、現像装置の維持管理が
煩雑で問題となる。Therefore, in such an apparatus, a toner concentration sensor must be provided to manage the toner concentration, and toner must be supplied in accordance with the toner concentration, making maintenance and management of the developing device complicated and problematic.
更にこのような二成分現像剤では、記録ドラム１）に現
像剤３を接触させて現像するため、記録ドラム１）の表
面はキャリア１によって摩擦され、傷が発生する問題が
ある。Furthermore, in such a two-component developer, since development is carried out by bringing the developer 3 into contact with the recording drum 1), there is a problem in that the surface of the recording drum 1) is rubbed by the carrier 1 and scratches occur.
更に本発明者等が以前に提案したように、記録ドラム１
）が一回転する間に、潜像形成および現像工程を複数回
繰り返すカラー記録の場合に於いて、第２段以降の現像
時に、それ以前に形成されているトナー像を破壊したり
、或いは混色を起こすことが避けられなかった。Furthermore, as previously proposed by the inventors, the recording drum 1
) In the case of color recording, in which latent image formation and development steps are repeated multiple times during one rotation, the previously formed toner image may be destroyed during the second and subsequent stages of development, or color mixing may occur. It was inevitable that this would happen.
尚、このようなカラー記録に於いて、第２段以降の現像
に一成分磁性トナーを用いて現像する方法を、本発明者
等は以前に提案している。Incidentally, in such color recording, the present inventors have previously proposed a method in which a one-component magnetic toner is used for the second and subsequent stages of development.
然し、上記した一成分磁性トナーは着色樹脂粉末に磁性
粉末を添加した構成をとっているため、鮮明なカラー記
録が実現できない問題がある。However, since the one-component magnetic toner described above has a structure in which magnetic powder is added to colored resin powder, there is a problem that clear color recording cannot be achieved.
本発明の現像装置は、非磁性スリーブ２５とこの非磁性
スリーブ２５に内包され、非磁性スリーブ２５と共に回
転する磁気ローラ２３と、この現像剤収容容器２１の現
像剤搬出口部３３に現像ローラ２８と対向して磁性体の
現像剤流れ規制手段２２を設けると共に、現像剤搬入口
部３０に磁性体の現像剤漏れ防止手段３４を設け、更に
現像ローラ２８の非磁性スリーブ２５の回転方向は、現
像剤２４が現像剤搬出口部３３より潜像担持体３１に向
かう方向とする。The developing device of the present invention includes a non-magnetic sleeve 25, a magnetic roller 23 that is enclosed in the non-magnetic sleeve 25 and rotates together with the non-magnetic sleeve 25, and a developing roller 28 that is disposed at a developer outlet 33 of the developer storage container 21. A developer flow regulating means 22 made of a magnetic material is provided opposite to the developer flow regulating means 22 , and a developer leakage prevention means 34 made of a magnetic material is provided at the developer inlet port 30 . The developer 24 is directed toward the latent image carrier 31 from the developer outlet 33 .
本発明の現像装置は、現像剤収容容器２１の、現像剤搬
出口３３に磁性体で形成された板状の現像剤流れ規制板
２２を設けるとともに、現像後の現像剤搬入口部３０に
磁性体の現像剤漏れ防止手段３４を設け、磁気ローラ２
３の回転によって磁気ローラ２３を構成する磁極が変化
しても、常に流れ規制板２２に磁気ローラ２３からの磁
力線が集束するようにする。The developing device of the present invention is provided with a plate-shaped developer flow regulating plate 22 formed of a magnetic material at the developer outlet 33 of the developer storage container 21, and a magnetic material is provided at the developer outlet 30 after development. A developer leak prevention means 34 is provided on the magnetic roller 2.
Even if the magnetic poles constituting the magnetic roller 23 change due to the rotation of the magnetic roller 3, the lines of magnetic force from the magnetic roller 23 are always focused on the flow regulating plate 22.
そしてトナー２６とキャリア２７よりなる二成分の現像
剤２４で形成される稲穂状の磁気ブラシが磁気ローラ２
３の磁極と流れ規制板２２の間に形成されるようにし、
この磁気ブラシによって流れ規制板２２を通過してキャ
リア２７が搬送されないようにし、トナー２６のみが現
像領域に到達するようにしたものである。An ear-shaped magnetic brush formed of a two-component developer 24 consisting of toner 26 and carrier 27 is attached to the magnetic roller 2.
so that it is formed between the magnetic pole of No. 3 and the flow regulating plate 22,
This magnetic brush prevents the carrier 27 from being conveyed past the flow regulating plate 22, so that only the toner 26 reaches the developing area.
またこの時、スリーブ２５上の非磁性トナー２６は、磁
性キャリア２７との摩擦帯電や、スリーブ２５との摩擦
帯電によって電荷を持ち、鏡像力で現像ローラ２８表面
に非磁性トナー２６層を形成するようにしたものである
。At this time, the non-magnetic toner 26 on the sleeve 25 has an electric charge due to frictional charging with the magnetic carrier 27 and frictional charging with the sleeve 25, and forms a layer of non-magnetic toner 26 on the surface of the developing roller 28 due to image force. This is how it was done.
更にスリーブ２５と磁性体の現像剤漏れ防止板３４との
間に磁気ブラシを形成し、この磁気ブラシによって現像
されずに現像剤収容容器２１に戻ってきたトナ一層を外
部に飛散しないようにして回収する。Furthermore, a magnetic brush is formed between the sleeve 25 and the developer leakage prevention plate 34 made of a magnetic material, and this magnetic brush prevents a layer of toner that has returned to the developer storage container 21 without being developed from scattering to the outside. to recover.
以下、図面を用いて本発明の一実施例につき詳細に説明
する。Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図に示すように、本発明の現像装置は非磁性の着色
樹脂粉末よりなるトナー２６と磁性粉末よりなるキャリ
ア２７とを混合した二成分の現像剤２４が収容されてい
る現像剤収容容器２１の現像剤搬出口部３３で、非磁性
のスリーブ２５とそれに内包される磁気ローラ２３とか
らなる現像ローラ２８に近接した位置で、磁性体よりな
る現像剤の流れ規制板２２を設けている。As shown in FIG. 1, the developing device of the present invention includes a developer container containing a two-component developer 24, which is a mixture of a toner 26 made of non-magnetic colored resin powder and a carrier 27 made of magnetic powder. 21, a developer flow regulating plate 22 made of a magnetic material is provided at a position close to a developing roller 28 made of a non-magnetic sleeve 25 and a magnetic roller 23 contained therein. .
更に現像剤収容容器２１の現像剤搬入口３０側で磁性体
の現像剤漏れ防止手段３４を設けている。Further, a developer leakage prevention means 34 made of a magnetic material is provided on the side of the developer carrying-in port 30 of the developer storage container 21 .
このような本発明の現像装置の動作について説明する。The operation of such a developing device of the present invention will be explained.
。 .
前記したトナー２６とキャリア２７とからなる二成分の
現像剤２４は、磁気ローラ２３の磁力により現像ローラ
２８の表面に吸着される。この時、磁気ローラ２３と非
磁性スリーブ２５は共に矢印Ｃ，Ｄに示すように反時計
方向に回転し、現像剤２４も反時計方向に搬送される。The two-component developer 24 consisting of the toner 26 and carrier 27 described above is attracted to the surface of the developing roller 28 by the magnetic force of the magnetic roller 23 . At this time, both the magnetic roller 23 and the non-magnetic sleeve 25 rotate counterclockwise as shown by arrows C and D, and the developer 24 is also conveyed counterclockwise.
ここで、現像剤２４は磁気ローラ２３の回転方向と同一
の方向に搬送されるため、現像剤２４の磁気ローラ２３
によって搬送される速度より、現像剤２４のスリーブ２
５によって搬送される速度の方を大きく設定しておく。Here, since the developer 24 is conveyed in the same direction as the rotational direction of the magnetic roller 23, the magnetic roller 23 of the developer 24
The speed at which the developer 24 is transported by the sleeve 2
5, the conveyance speed is set higher.
この結果、現像ローラ２８の表面に吸着された現像剤２
４は、磁気ローラ２３の磁極の移動で自転運動をしなが
ら、非磁性スリーブ２５の回転方向に搬送される。また
現像剤２４は自転運動とスリーブ２５との摩擦によって
トナー２６とキャリア２７はそれぞれ逆極性の電荷を持
つようになる。そして流れ規制板２２に到達すると、流
れ規制板２２は磁性体であり磁気ローラ２３の磁極と逆
極性となるため、現像剤２４はスリーブ２５表面と流れ
規制板２２の間を磁気ブラシでつなぐようになる。As a result, the developer 2 adsorbed on the surface of the developing roller 28
4 is conveyed in the rotational direction of the non-magnetic sleeve 25 while performing rotational movement due to the movement of the magnetic pole of the magnetic roller 23. Further, due to the rotational movement of the developer 24 and friction with the sleeve 25, the toner 26 and the carrier 27 each have charges of opposite polarity. When the developer 24 reaches the flow regulating plate 22, the flow regulating plate 22 is a magnetic material and has a polarity opposite to that of the magnetic roller 23. become.
また現像剤２４は流れ規制板２２の個所で滞留しはじめ
、遂には流れ規制板２２に沿って上部の方向に移動し、
途中から現像剤２４の表層部を滑って現像剤収容容器２
１の底部に到達する。Further, the developer 24 begins to stay at the flow regulating plate 22, and finally moves upward along the flow regulating plate 22.
The developer container 2 slides on the surface layer of the developer 24 from the middle.
Reach the bottom of 1.
また現像剤２４が流れ規制板２２とスリーブ２５間に磁
気ブラシを形成すると、非磁性トナー２６は鏡像力で非
磁性スリーブ２５に静電的に付着する。Further, when the developer 24 forms a magnetic brush between the flow regulating plate 22 and the sleeve 25, the non-magnetic toner 26 electrostatically adheres to the non-magnetic sleeve 25 due to image force.
尚、非磁性トナー２６の非磁性スリーブ２５への付着は
流れ規制板２２に到達する迄の搬送途中でも起こる。そ
して非磁性スリーブ２５の回転に従って現像領域に搬送
される。現像ローラ２８と記録ドラム２９とが対向した
現像領域で、非磁性スリーブ２５と記録ドラム２９間に
現像バイアス用電源３２で現像バイアスを印加しておけ
ば、記録ドラム２９上の周囲の潜像担持体３１に形成さ
れた静電潜像にトナー２６が付着して現像が行われる。Incidentally, the non-magnetic toner 26 adheres to the non-magnetic sleeve 25 even during transportation until it reaches the flow regulating plate 22 . Then, as the non-magnetic sleeve 25 rotates, it is transported to the developing area. If a developing bias is applied between the non-magnetic sleeve 25 and the recording drum 29 by the developing bias power source 32 in the developing region where the developing roller 28 and the recording drum 29 face each other, the peripheral latent image on the recording drum 29 will be retained. The toner 26 adheres to the electrostatic latent image formed on the body 31 and development is performed.
現像に用いられながったトナ一層は更に搬送されて収容
容器２１に到達する。The toner layer that has not been used for development is further transported and reaches the storage container 21.
ところで、現像部で記録ドラム２９の潜像担持体３１に
付着されないトナー２６が、現像剤収容容器２１に搬送
されてきた現像剤搬入口部３０には磁性体よりなる現像
剤漏れ防止板３４が設けである。By the way, a developer leak prevention plate 34 made of a magnetic material is provided at the developer inlet port 30 where the toner 26 that is not attached to the latent image carrier 31 of the recording drum 29 in the developing section is transported to the developer storage container 21. It is a provision.
この漏れ防止板３４は、前記した流れ規制板２２と同様
に非磁性スリーブ２５ととの間に磁気ブラシを形成する
。この磁気ブラシによって、現像剤収容容器２１内の現
像剤２４は外部へ流出するのを防止される。また現像部
で現像されずに戻ってきた現像ドラム２８上のトナ一層
２６Ａは、この磁気ブラシによりせき止められ、スリー
ブ２５より剥がされて、磁気ブラシのキャリアにより吸
着される。This leak prevention plate 34 forms a magnetic brush between it and the non-magnetic sleeve 25 similarly to the flow regulating plate 22 described above. This magnetic brush prevents the developer 24 in the developer storage container 21 from flowing out. Further, the toner layer 26A on the developing drum 28 that has not been developed in the developing section and has returned is stopped by the magnetic brush, peeled off from the sleeve 25, and attracted by the carrier of the magnetic brush.
この磁気ブラシは、回収したトナーを吸着した状態で、
自転運動をしながら流れ規制板２２の方向に搬送される
。This magnetic brush absorbs the collected toner and
It is conveyed in the direction of the flow regulating plate 22 while rotating.
尚、本実施例では図示していないが、現像によってトナ
ーが消費されるため、公知のトナー供給系によって新た
なトナーを補充するようにしても良い。Although not shown in this embodiment, since toner is consumed during development, new toner may be replenished by a known toner supply system.
本実施例によれば、スリーブ２５と共に磁気ローラ２３
を回転させているため、現像剤の磁気ブラシの自転運動
が起こり、トナーとキャリアとの攪拌が非磁性スリーブ
のみの現像剤搬送時に比べ充分に行われる。この結果、
搬送中にトナーは短時間で確実に帯電され、非磁性スリ
ーブ表面へのトナ一層の形成が容易に行われる。つまり
非磁性スリーブ２５のみの回転による現像剤の搬送方式
では困難である高速記録への適用が可能となる。According to this embodiment, together with the sleeve 25, the magnetic roller 23
Since the developer is rotated, the magnetic brush of the developer rotates on its own axis, and the toner and carrier are more thoroughly stirred than when the developer is conveyed using only a non-magnetic sleeve. As a result,
During transportation, the toner is reliably charged in a short time, and a layer of toner is easily formed on the surface of the non-magnetic sleeve. In other words, it is possible to apply the present invention to high-speed recording, which is difficult to achieve with a developer conveyance system based on the rotation of only the non-magnetic sleeve 25.
更に非磁性スリーブ２５の回転による現像剤搬送速度が
、磁気ローラ２３による搬送速度より大きいため、漏れ
防止板３４上で剥がされたトナーは、キャリアと共に常
に流れ規制板２２の方向、つまり反時計方向に向かって
搬送され、漏れ防止板３４の近傍に滞留したり、漏れ防
止板３４より外部へ飛散することもない。Furthermore, since the developer conveyance speed due to the rotation of the non-magnetic sleeve 25 is higher than the conveyance speed due to the magnetic roller 23, the toner peeled off on the leak prevention plate 34 always flows in the direction of the flow regulating plate 22, that is, counterclockwise, together with the carrier. There is no possibility that the leakage prevention plate 34 will be transported toward the leakage prevention plate 34 and will not accumulate near the leakage prevention plate 34 or be scattered outside from the leakage prevention plate 34.
尚、本実施例では磁気ローラ２３と非磁性スリーブ２５
とも同一方向（反時計方向）回転で説明したがトナ一層
を搬送するための非磁性スリーブ２５が反時計方向に回
転しておれば良く、磁気ローラ２３の回転方向は問わな
い。また現像剤収容容器２１内に於ける現像剤２４の搬
送方向も反時計方向である必要はなく、この搬送方向は
磁気ローラ２３による搬送方向と速度、および非磁性ス
リーブ２５による搬送方向と速度との兼ね合いで決まる
。In this embodiment, the magnetic roller 23 and the non-magnetic sleeve 25 are
Although the description has been made with both rotating in the same direction (counterclockwise), the rotation direction of the magnetic roller 23 does not matter as long as the non-magnetic sleeve 25 for conveying one layer of toner rotates counterclockwise. Furthermore, the direction in which the developer 24 is conveyed in the developer storage container 21 does not necessarily have to be counterclockwise; It is determined by the balance between
更に本実施例の他に磁気ローラ２３のみを固定させた装
置も可能である。この場合にはスリーブ２５と現像剤流
れ規制板２２、およびスリーブ２５と現像剤漏れ防止板
３４の間に磁気ブラシが形成されるよに、各板２２，３
４に対向する位置に磁気ローラ２３の磁極が位置するよ
うに調整すると良い。Furthermore, in addition to this embodiment, a device in which only the magnetic roller 23 is fixed is also possible. In this case, the plates 22, 3 are arranged so that magnetic brushes are formed between the sleeve 25 and the developer flow regulating plate 22, and between the sleeve 25 and the developer leak prevention plate 34.
It is preferable to adjust the magnetic pole of the magnetic roller 23 so that it is located at a position opposite to the magnetic roller 23.
また現像バイアス電圧は直流でも交流でもいずれでも良
い。Further, the developing bias voltage may be either direct current or alternating current.
本発明の現像装置によれば、流れ規制板で二成分現像剤
のキャリアのみを確実に選択的にせき止めることができ
、現像領域にはトナ一層のみを搬送することができるの
で、トナー濃度の管理を厳密に行う必要がなく、装置が
簡単なものとなり低コストの装置が得られる。According to the developing device of the present invention, only the carrier of the two-component developer can be reliably and selectively blocked by the flow regulating plate, and only one layer of toner can be transported to the developing area, so that the toner concentration can be controlled. It is not necessary to carry out the process strictly, and the apparatus becomes simple and a low-cost apparatus can be obtained.
また現像領域にはキャリアがないため、記録ドラムの表
面を傷つけることがなく、トナ一層のみによる現像のた
めソフトな現像が得られ、カラー記録に用いると鮮明で
像破壊や、混色のない良好な記録を行い得るといった効
果がある。In addition, since there is no carrier in the development area, the surface of the recording drum will not be damaged, and since development is performed using only a single layer of toner, soft development can be obtained, and when used for color recording, it is clear and has good quality without image destruction or color mixing. This has the effect of being able to record.
更に磁気ローラを回転させているため、トナーの攪拌が
充分にでき、トナーの帯電が短時間で確実に容易に行う
ことができ、高速記録が可能となる効果がある。Furthermore, since the magnetic roller is rotated, the toner can be sufficiently agitated, the toner can be charged easily and reliably in a short time, and high-speed recording is possible.
また現像剤漏れ防止板を設けているので、現像剤収容容
器内に回収されてきたトナーが外部に飛散するような事
故も防止でき、高信頼度の現像装置が得られる効果があ
る。Further, since the developer leakage prevention plate is provided, accidents such as toner collected in the developer storage container scattering outside can be prevented, and a highly reliable developing device can be obtained.
第１図は本発明の現像装置を示す模式図、第２図は従来
の現像装置を示す模式図、第３図は現像装置に於ける現
像剤の状態を示す模式図である。
図に於いて、
２１は現像剤収容容器、２２は流れ規制板、２３は磁気
ローラ、２４は現像剤、２５はスリーブ、２６はトナー
、２６Ａはトナ一層、２７はキャリア、２８は現像ロー
ラ、２９は記録ドラム、３０は現像剤搬入口部、３１は
潜像担持体、３２は現像バイアス電源、３３は現像剤搬
出口部、Ｃは磁気ローラの回転方向を示す矢印、Ｄはス
リーブの回転方向を示す矢印である。
不発８庖理成を１榎天帛
第 １ 図
ｅめ磨東緊訃攻店図
＠２ 図
す
珀ｆｇ９ｔｚｈｔｔ３理ｆ象刑化刀εよ１銚式図第３図FIG. 1 is a schematic diagram showing a developing device of the present invention, FIG. 2 is a schematic diagram showing a conventional developing device, and FIG. 3 is a schematic diagram showing the state of developer in the developing device. In the figure, 21 is a developer storage container, 22 is a flow regulating plate, 23 is a magnetic roller, 24 is a developer, 25 is a sleeve, 26 is a toner, 26A is a toner layer, 27 is a carrier, 28 is a developing roller, 29 is a recording drum, 30 is a developer inlet, 31 is a latent image carrier, 32 is a developing bias power source, 33 is a developer outlet, C is an arrow indicating the direction of rotation of the magnetic roller, and D is rotation of the sleeve. It is an arrow indicating the direction. Unexploded 8 庖 Risei 1 Enoki Tenpaku No. 1 Figure e Mema Tokin attack store diagram @ 2 Figure 9 fg 9 tzhtt 3 Rif Elephant punishment εyo 1 Choshiki diagram Figure 3
Claims (3)
現像剤を収容する現像剤収容容器と、回転可能な非磁性
スリーブおよびこれに内包された磁気ローラよりなる現
像ローラを備え、該非磁性スリーブ、および磁気ローラ
の少なくとも一方を回転させて前記現像ローラの表面に
沿って前記二成分現像剤を搬送する現像装置に於いて、 回転可能な非磁性スリーブ（２５）と該非磁性スリーブ
（２５）に内包される磁気ローラ（２３）とからなる現
像ローラ（２８）と、 前記現像剤収容容器（２１）の現像剤搬出口部（３３）
に現像ローラ（２８）と対向する磁性体の現像剤流れ規
制手段（２２）と、 更に前記現像剤収容容器（２１）の現像剤搬入口部（３
０）に前記現像ローラ（２８）と対向する磁性体の現像
剤漏れ防止手段（３４）とを設け、 前記非磁性スリーブ（２５）の回転方向は、現像剤（２
４）が現像剤搬出口部（３３）より潜像担持体（３１）
に向かう方向としたことを特徴とする現像装置。(1) A developer storage container containing a two-component developer consisting of a magnetic carrier and a non-magnetic toner, a rotatable non-magnetic sleeve, and a developing roller consisting of a magnetic roller included in the non-magnetic sleeve, the non-magnetic sleeve , and a developing device that rotates at least one of a magnetic roller to convey the two-component developer along the surface of the developing roller, a rotatable non-magnetic sleeve (25) and a rotatable non-magnetic sleeve (25). a developing roller (28) consisting of an enclosed magnetic roller (23); and a developer outlet portion (33) of the developer storage container (21).
a developer flow regulating means (22) made of a magnetic material facing the developing roller (28);
0) is provided with a magnetic developer leak prevention means (34) facing the developing roller (28), and the rotating direction of the non-magnetic sleeve (25)
4) is the latent image carrier (31) from the developer exit port (33).
A developing device characterized in that the developing device is oriented in a direction toward.
３）をスリーブ（２５）と共に回転させるようにしたこ
とを特徴とする特許請求の範囲第１項に記載の現像装置
。(2) The magnetic roller (2) of the developing roller (28)
3) The developing device according to claim 1, wherein the developing device is configured to rotate together with the sleeve (25).
３）のみを固定させるようにしたことを特徴とする特許
請求の範囲第１項に記載の現像装置。(3) Magnetic roller (2) of the former developing roller (28)
3) The developing device according to claim 1, wherein only the portion 3) is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21312485A JPS6271985A (en) | 1985-09-25 | 1985-09-25 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21312485A JPS6271985A (en) | 1985-09-25 | 1985-09-25 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6271985A true JPS6271985A (en) | 1987-04-02 |
Family
ID=16633971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21312485A Pending JPS6271985A (en) | 1985-09-25 | 1985-09-25 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6271985A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0653222U (en) * | 1992-10-23 | 1994-07-19 | 節子 相野谷 | Cooler for trunk room |
-
1985
- 1985-09-25 JP JP21312485A patent/JPS6271985A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0653222U (en) * | 1992-10-23 | 1994-07-19 | 節子 相野谷 | Cooler for trunk room |
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