JPH056098A - Two component developing device - Google Patents
Two component developing deviceInfo
- Publication number
- JPH056098A JPH056098A JP3158970A JP15897091A JPH056098A JP H056098 A JPH056098 A JP H056098A JP 3158970 A JP3158970 A JP 3158970A JP 15897091 A JP15897091 A JP 15897091A JP H056098 A JPH056098 A JP H056098A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- toner
- section
- developing
- stirring
- 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.)
- Withdrawn
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は複写機、プリンタ等の画
像形成装置に用いられる現像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device used in an image forming apparatus such as a copying machine or a printer.
【0002】[0002]
【従来の技術】この種の画像形成装置における現像装置
の代表的なものとして、現像用トナーを主とする一成分
現像剤を使用する一成分現像装置と、トナー及びキャリ
アを主とする二成分現像剤を用いる二成分現像装置があ
る。このうち二成分現像装置は、通常、現像剤供給部か
ら供給される現像剤を現像剤規制部材にて搬送量を規制
しつつ磁石体の周囲を回転する現像スリーブ上に保持し
て感光体ドラム等の静電潜像担持体に臨む現像領域へ搬
送し、該潜像担持体上の静電潜像を現像し、可視化す
る。2. Description of the Related Art As a typical developing device in this type of image forming apparatus, a one-component developing device using a one-component developer mainly containing a developing toner and a two-component developing device mainly containing a toner and a carrier. There is a two-component developing device that uses a developer. Of these, the two-component developing device normally holds a developer supplied from a developer supply unit on a developing sleeve that rotates around a magnet body while controlling the amount of conveyance by a developer regulating member, and a photosensitive drum. And the like, and the electrostatic latent image on the latent image carrier is developed and visualized.
【0003】このような二成分現像装置では、現像に伴
いトナーが消費され、装置中現像剤のトナー濃度が低下
する。そのため、通常、新トナーを補給する手段が備わ
っている。トナー補給手段から補給されたトナーは装置
中の既存現像剤と混合攪拌され、キャリアとの摩擦によ
り帯電したのち現像に供される。この混合攪拌は装置構
造によって種々の態様で行われるが、1例を挙げると、
前記現像剤規制部材にて搬送を阻止された現像剤を受け
入れる現像剤攪拌部を設けておき、また、この攪拌部へ
新トナーを補給するようにし、前記規制部材から流入し
てきた現像剤をここで新トナーと混合攪拌して再び現像
剤供給部へ戻す。In such a two-component developing device, toner is consumed during development, and the toner concentration of the developer in the device is lowered. Therefore, a means for replenishing new toner is usually provided. The toner replenished from the toner replenishing means is mixed and stirred with the existing developer in the apparatus, charged by friction with the carrier, and then provided for development. This mixing and stirring is performed in various modes depending on the structure of the apparatus.
A developer stirring portion for receiving the developer whose conveyance is blocked by the developer regulating member is provided, and new toner is replenished to the stirring portion. Then, the mixture is agitated with new toner and returned to the developer supply section.
【0004】[0004]
【発明が解決しようとする課題】しかし、このタイプの
現像装置では、現像剤攪拌部のケーシング部材は、製作
の容易化、製作コスト高の抑制の目的で、合成樹脂のよ
うな非磁性材料で製作してあり、また、前記現像剤規制
部材は一般に現像スリーブに臨んでおり、従って前記現
像剤攪拌部は、該規制部材からの現像剤を受け入れるよ
うに、現像スリーブに近く、換言すれば、スリーブ内の
磁石体に近く配置されているから、該攪拌部のケーシン
グ部材内空間が該磁石体の磁力の影響を受ける。However, in this type of developing device, the casing member of the developer stirring section is made of a non-magnetic material such as a synthetic resin for the purpose of facilitating the manufacture and suppressing the manufacturing cost. It is manufactured, and the developer regulating member generally faces the developing sleeve. Therefore, the developer stirring section is close to the developing sleeve so as to receive the developer from the regulating member, in other words, Since it is arranged close to the magnet body in the sleeve, the space inside the casing member of the stirring section is affected by the magnetic force of the magnet body.
【0005】すなわち、磁石体の磁場の影響で攪拌部内
部の現像剤が攪拌部ケーシング部材の内壁に拘束される
結果、流動性の良いフェライト系のキャリアを採用する
ときはともかく、流動性の悪いバインダータイプのキャ
リアの場合には、凝集状態となって、極めて流動性が低
下する。そのため、現像剤攪拌部における現像剤の自由
な動きが阻まれ、新トナーとの混合攪拌が十分行われな
いという問題がある。また、新トナーが補給されないと
きでも、この攪拌部で期待される現像剤の攪拌が不十分
となる。このように攪拌或いは混合攪拌が不十分になる
と、トナーの荷電性が不安定となり、安定した現像剤を
供し難くなり、画質劣化を招く。また、トナー帯電不良
が生じると、下地かぶり等の現像不良(画質不良)に加
え、トナーが周囲へ飛散する。That is, as a result of the developer in the stirring section being constrained by the inner wall of the stirring section casing member due to the influence of the magnetic field of the magnet body, the fluidity is poor, even when a ferrite-based carrier having good fluidity is adopted. In the case of a binder type carrier, it becomes an agglomerated state and the fluidity is extremely lowered. Therefore, there is a problem that the free movement of the developer in the developer stirring section is blocked, and the mixing and stirring with the new toner is not sufficiently performed. Even when the new toner is not replenished, the stirring of the developer expected in this stirring section becomes insufficient. If the stirring or the mixing and stirring becomes insufficient in this way, the chargeability of the toner becomes unstable, and it becomes difficult to provide a stable developer, which causes deterioration of image quality. Further, when toner charging failure occurs, toner is scattered to the surroundings in addition to development failure (image quality failure) such as background fogging.
【0006】そこで本発明は、現像剤供給部から供給さ
れる現像剤を現像剤規制部材にて搬送量を規制しつつ磁
石体の周囲を回転する現像スリーブ上に保持して現像領
域へ搬送する一方、前記規制部材にて搬送を阻止した現
像剤を現像剤攪拌部へ受け入れ、ここに補給されるトナ
ーと混合攪拌して前記現像剤供給部へ戻すようにした二
成分現像装置において、前記現像剤攪拌部における現像
剤の流動性を向上させ、それによって現像剤の混合、攪
拌を円滑化してトナーの荷電性を安定させ、画質を向上
させるとともに、トナー飛散を抑制し、装置の信頼性を
向上させることを目的とする。Therefore, according to the present invention, the developer supplied from the developer supply section is held on the rotating developing sleeve around the magnet body while being controlled by the developer regulating member and conveyed to the developing area. On the other hand, in the two-component developing device in which the developer whose conveyance is blocked by the regulating member is received in the developer agitating section, mixed and agitated with the toner supplied thereto, and returned to the developer supplying section, Improves the fluidity of the developer in the agent agitator, thereby facilitating the mixing and agitation of the developer, stabilizing the chargeability of the toner, improving the image quality, suppressing toner scattering, and improving the reliability of the device. The purpose is to improve.
【0007】[0007]
【課題を解決するための手段】本発明は前記目的に従
い、現像剤供給部から供給される現像剤を現像剤規制部
材にて搬送量を規制しつつ磁石体の周囲を回転する現像
スリーブ上に保持して現像領域へ搬送する一方、前記規
制部材にて搬送を阻止した現像剤を現像剤攪拌部へ受け
入れ、ここに補給されるトナーと混合攪拌して前記現像
剤供給部へ戻すようにした二成分現像装置において、前
記現像剤攪拌部のケーシング部材を磁性材料にて構成し
たことを特徴とする二成分現像装置を提供するものであ
る。According to the above-mentioned object, the present invention is provided on a developing sleeve which rotates around a magnet body while controlling the conveyance amount of a developer supplied from a developer supplying section by a developer restricting member. While being held and conveyed to the developing area, the developer whose conveyance has been blocked by the regulating member is received in the developer stirring section, mixed with the toner supplied thereto and stirred, and returned to the developer supplying section. In a two-component developing device, a casing member of the developer stirring section is made of a magnetic material, and a two-component developing device is provided.
【0008】前記攪拌部を構成するケーシング部材の磁
性材料としては、鉄、ニッケル或いはこれらを含むステ
ンレススチール等の合金等を挙げることができる。Examples of the magnetic material of the casing member forming the stirring section include iron, nickel, and alloys such as stainless steel containing these.
【0009】[0009]
【作用】本発明現像装置によると、現像剤供給部から現
像スリーブへ供給された現像剤は、スリーブ内部の磁石
体の磁力に基づき該スリーブ上に保持され、該スリーブ
の回転に伴って現像剤規制部材により搬送量を規制され
つつ現像領域へ搬送され、ここで静電潜像担持体上の静
電潜像の現像に供される。余った現像剤はスリーブの回
転に伴って再び現像剤供給部へ戻される。According to the developing device of the present invention, the developer supplied from the developer supply portion to the developing sleeve is held on the sleeve by the magnetic force of the magnet body inside the sleeve, and the developer is rotated as the sleeve rotates. The transport amount is regulated by the regulation member while being transported to the developing area, where it is used for developing the electrostatic latent image on the electrostatic latent image carrier. The remaining developer is returned to the developer supply unit again as the sleeve rotates.
【0010】一方、現像剤規制部材により搬送を阻止さ
れた現像剤は現像剤攪拌部へ回収され、ここで攪拌され
たのち、或いはここへ供給される新トナーと混合攪拌さ
れたのち、再び現像剤供給部へ戻される。前記攪拌部の
ケーシング部材は磁性材料で形成してあるので、前記磁
石体の磁力がケーシング部材内部の空間へ及ぶことがな
いか又は殆ど無く、従って該攪拌部へ回収された現像剤
は磁石体の磁力の影響を受けることなく流動性良好な状
態で混合、攪拌される。On the other hand, the developer whose conveyance has been blocked by the developer regulating member is collected in the developer agitating section, and is agitated there, or after being agitated with new toner supplied thereto, and is again developed. It is returned to the agent supply section. Since the casing member of the stirring unit is made of a magnetic material, the magnetic force of the magnet body does not reach or hardly reaches the space inside the casing member. Therefore, the developer collected in the stirring unit is magnet body. Are mixed and stirred in a state of good fluidity without being affected by the magnetic force of.
【0011】[0011]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図1は一実施例現像装置の断面図であり、図2は
その一部の拡大断面図である。この現像装置Aは現像剤
供給部1、トナー濃度検出部2、現像部3、現像剤攪拌
部4及びトナー補給部5を備えている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a developing device of one embodiment, and FIG. 2 is an enlarged sectional view of a part thereof. The developing device A includes a developer supplying section 1, a toner concentration detecting section 2, a developing section 3, a developer stirring section 4, and a toner replenishing section 5.
【0012】現像剤供給部1はバケットローラ12を備
えており、このローラは図面には片方のものしか示され
ていない左右の側板13、これら側板間に所定間隔をお
いて平行に架設したバケット14及びバケット14の内
側に配置した横送り羽根15を備えている。このバケッ
トローラは図示しない駆動手段により図中時計方向に回
転駆動され、トナーとキャリアを含む二成分現像剤Xを
バケット14で掬って現像部3へ供給する一方、このロ
ーラへ流入してきた現像剤を横送り羽根15によってロ
ーラの左右端部へ向け移動させる。The developer supply unit 1 is equipped with a bucket roller 12, which is shown in the drawing as only one of the left and right side plates 13 and the buckets installed in parallel with each other at a predetermined interval between the side plates. 14 and the transverse feed blade 15 arranged inside the bucket 14. This bucket roller is rotationally driven in the clockwise direction in the drawing by a driving means (not shown), scoops the two-component developer X containing toner and carrier by the bucket 14 and supplies it to the developing section 3, while the developer which has flowed into this roller is supplied. Is moved toward the left and right ends of the roller by the lateral feed blade 15.
【0013】トナー濃度検出部2は現像剤搬送スクリュ
ー21を備えており、このスクリュー21は左右端部か
ら中央部へ現像剤を搬送することができるもので、該中
央部にはここを通過する現像剤のトナー濃度を検出する
ATDCセンサ22を設けてある。現像部3は上側現像
部31a及びその下方の下側現像部31bを含んでい
る。上側現像部31aは固定磁石ロール32a及びその
周囲を回転する現像スリーブ33aを備えており、下側
現像部31bは固定磁石ロール32bとその周囲を回転
する現像スリーブ33bを備えている。これら現像スリ
ーブ33a、33bは図示しない駆動手段により図中時
計方向に回転駆動される。The toner concentration detecting section 2 is provided with a developer conveying screw 21, which can convey the developer from the left and right end portions to the central portion, and passes through the central portion. An ATDC sensor 22 for detecting the toner concentration of the developer is provided. The developing unit 3 includes an upper developing unit 31a and a lower developing unit 31b below the upper developing unit 31a. The upper developing unit 31a includes a fixed magnet roll 32a and a developing sleeve 33a that rotates around the fixed magnet roll 32a, and the lower developing unit 31b includes a fixed magnet roll 32b and a developing sleeve 33b that rotates around the fixed magnet roll 32b. These developing sleeves 33a and 33b are rotationally driven in the clockwise direction in the drawing by a driving means (not shown).
【0014】なお上側の現像スリーブ33aには現像剤
規制部材である穂高規制部材35が臨んでいる。現像剤
攪拌部4はバケットローラ12の上方、且つ、穂高規制
部材35から現像剤を回収する位置に設けてあり、ケー
シング部材41とこの中に収められた攪拌ローラ45を
備えている。ケーシング部材41は全体が磁性材料であ
る鉄材からなっており、その一端部42は穂高規制部材
35に臨んでおり、反対側の端部43はバケットローラ
12に臨んでいる。攪拌ローラ45は攪拌羽根44を備
えており、図示しない駆動手段により図中時計方向に回
転駆動される。Note that the upper developing sleeve 33a faces the spike height regulating member 35 which is a developer regulating member. The developer stirring section 4 is provided above the bucket roller 12 and at a position where the developer is collected from the spike height regulating member 35, and includes a casing member 41 and a stirring roller 45 housed in the casing member 41. The casing member 41 is entirely made of an iron material which is a magnetic material, one end portion 42 thereof faces the spike height regulating member 35, and the opposite end portion 43 thereof faces the bucket roller 12. The stirring roller 45 is provided with a stirring blade 44, and is rotationally driven in the clockwise direction in the drawing by a driving unit (not shown).
【0015】ケーシング部材41の端部43はバケット
ローラ12のバケット14の最外周運動軌跡円Cに対し
予め定めた間隙Gを置いて臨んでいる。トナー補給部5
は攪拌ローラ45の上方に配置したトナー溜まり室53
とその横に設けたトナー補給室51を備えており、トナ
ー溜まり室53にはブラシローラ54が設けてあり、ト
ナー補給室51にはトナー搬送部材52が設けてある。
トナー溜まり室53と現像材攪拌部4との間にはトナー
補給口55が形成してあり、この補給口には金網のよう
な多孔板56が配置してあり、ブラシローラ54はこの
多孔板56に接しつつ、図示しない駆動手段により図中
時計方向に回転駆動される。トナー搬送部材52は図示
しない駆動手段により図中反時計方向に回転駆動され
る。The end portion 43 of the casing member 41 faces the outermost movement locus circle C of the bucket 14 of the bucket roller 12 with a predetermined gap G. Toner supply section 5
Is a toner storage chamber 53 arranged above the stirring roller 45.
And a toner replenishing chamber 51 provided beside it, a brush roller 54 is provided in the toner reservoir chamber 53, and a toner conveying member 52 is provided in the toner replenishing chamber 51.
A toner replenishing port 55 is formed between the toner reservoir chamber 53 and the developer agitating section 4, and a perforated plate 56 such as a wire mesh is arranged at the replenishment port, and the brush roller 54 is the perforated plate. While being in contact with 56, they are rotationally driven in the clockwise direction in the drawing by a driving means (not shown). The toner conveying member 52 is rotationally driven in the counterclockwise direction in the drawing by a driving unit (not shown).
【0016】以上説明した現像装置は、現像部の現像ス
リーブ33a、33bが感光体ドラムBに所定の現像ギ
ャップをおいて臨むように複写機に組み込まれる。この
現像装置によると、現像剤供給部1におけるバケットロ
ーラ12の回転により現像剤Xが現像部3における下側
の現像スリーブ33bに供給され、このように供給され
た現像剤は磁石ロール32bの磁力に基づき該スリーブ
上に保持されてスリーブの回転に伴い搬送され、上側の
現像スリーブ33aに臨む位置にくる。ここで下側の磁
石ロール32bと上側の磁石ロール32aの磁力に基づ
き上側の現像スリーブ33a上に移動し、該スリーブの
回転に伴って穂高規制部材35に達し、ここで搬送量を
規制され、この部材35をくぐり抜けた現像剤は上側ス
リーブ33aの回転に伴って第1の現像領域34aに達
し、ここで感光体ドラムB上の静電潜像を現像する。こ
の現像領域34aを通過した現像剤は上側スリーブ33
aから下側スリーブ33b上へ渡され、該スリーブ33
bの回転に伴って第2の現像領域34bに至り、ここで
再び静電潜像を確実に現像したのち、余った現像剤は該
スリーブの回転に伴って現像剤供給部側へ搬送され、磁
石ロール32bにおける分離磁極N5においてスリーブ
33bから離れ、現像剤供給部1へ流入する。The developing device described above is incorporated in a copying machine so that the developing sleeves 33a and 33b of the developing section face the photosensitive drum B with a predetermined developing gap. According to this developing device, the developer X is supplied to the lower developing sleeve 33b in the developing unit 3 by the rotation of the bucket roller 12 in the developer supplying unit 1, and the developer thus supplied has the magnetic force of the magnet roll 32b. Based on the above, it is held on the sleeve, conveyed as the sleeve rotates, and comes to a position facing the upper developing sleeve 33a. Here, based on the magnetic forces of the lower magnet roll 32b and the upper magnet roll 32a, it moves onto the upper developing sleeve 33a and reaches the spike height regulating member 35 with the rotation of the sleeve, where the conveyance amount is regulated, The developer that has passed through the member 35 reaches the first developing area 34a as the upper sleeve 33a rotates, and develops the electrostatic latent image on the photosensitive drum B here. The developer that has passed through the developing area 34a is transferred to the upper sleeve 33.
a on the lower sleeve 33b, and the sleeve 33
The second developing region 34b is reached with the rotation of b, and the electrostatic latent image is surely developed there again, and the excess developer is conveyed to the developer supply unit side with the rotation of the sleeve. At the separation magnetic pole N5 of the magnet roll 32b, it separates from the sleeve 33b and flows into the developer supply unit 1.
【0017】一方、バケットローラ12の回転により移
動する現像剤Xの一部はトナー濃度検出部2におけるス
クリュー21の両端部へ供給され、ここから該スクリュ
ー21の回転に伴ってその中央部へ移動し、トナー濃度
検出センサ22によってトナー濃度を検出されたのち再
び現像剤供給部1へ流入する。前記穂高規制部材35に
よって搬送を阻止された現像剤X1 は現像剤攪拌部4の
ケーシング部材41の端部42から該ケーシング部材内
へ流入回収され、該部材内で攪拌ローラ45の回転によ
り攪拌され、再びケーシング部材端部43側から現像剤
供給部1へ戻される。On the other hand, a part of the developer X which is moved by the rotation of the bucket roller 12 is supplied to both ends of the screw 21 in the toner concentration detecting section 2 and is moved from here to the center thereof as the screw 21 rotates. Then, after the toner concentration is detected by the toner concentration detection sensor 22, the toner flows again into the developer supply unit 1. The developer X 1 which has been prevented from being conveyed by the spike height regulating member 35 flows into the casing member 41 from the end portion 42 of the casing member 41 of the developer stirring unit 4 and is collected therein, and is agitated by rotation of a stirring roller 45 in the member. Then, the casing member end portion 43 side is returned to the developer supply unit 1 again.
【0018】トナー補給部5はトナー濃度検出センサ2
2によって検出されるトナー濃度に応じて必要量のトナ
ーを補給するように運転される。トナー補給部5による
新トナーの補給は、トナー補給室51におけるトナー搬
送部材52の回転によってトナー溜まり室53に供給さ
れたトナーが、該室43のブラシローラ54の回転によ
り多孔板56及びトナー補給口55を介して現像剤攪拌
部4中へ供給される。The toner replenishing section 5 is a toner concentration detecting sensor 2
The operation is performed so as to replenish the required amount of toner according to the toner density detected by 2. When the toner replenishing unit 5 replenishes the new toner, the toner supplied to the toner reservoir chamber 53 by the rotation of the toner conveying member 52 in the toner replenishing chamber 51 is replenished by the rotation of the brush roller 54 in the chamber 43 and the toner replenishing chamber 53. It is supplied into the developer stirring section 4 through the port 55.
【0019】現像剤攪拌部へ供給された新トナーは攪拌
ローラ45の回転によりここへ流入してきた現像剤X1
と混合攪拌され、現像剤供給部1へ供給される。前記現
像剤攪拌部におけるケーシング部材41は磁性材料で形
成してあるので、図2に示すように、現像部3における
上下の磁石ロール32a、32bの磁力はこの部材41
に阻止されて攪拌部4内に及ぶことがなく、従って穂高
規制部材35により搬送を阻止されて攪拌部4内に回収
されてきた現像剤X1 は磁力の影響を受けることなく流
動性良く攪拌され、またトナー補給部5から新トナーが
ここへ補給されるときには、該トナーとも十分に混合攪
拌され、そのため、トナーの荷電性が安定し、期待され
るトナー帯電量を得たのち現像剤供給部へ流入し、現像
に供される。その結果、複写機において得られる画像の
画質が向上し、トナー飛散も抑制され、装置全体の信頼
性が向上する。The new toner supplied to the developer stirring section flows into the developer X 1 by the rotation of the stirring roller 45.
Is mixed and stirred, and is supplied to the developer supply unit 1. Since the casing member 41 in the developer stirring section is made of a magnetic material, as shown in FIG. 2, the magnetic forces of the upper and lower magnet rolls 32a and 32b in the developing section 3 are the magnetic force of this member 41.
Therefore, the developer X 1 collected in the stirring section 4 after being prevented from being conveyed by the spike height regulating member 35 is stirred with good fluidity without being affected by the magnetic force. When the new toner is replenished from the toner replenishing section 5, the toner is sufficiently mixed and agitated, so that the chargeability of the toner is stabilized and the developer is supplied after the expected toner charge amount is obtained. And then supplied for development. As a result, the quality of the image obtained in the copying machine is improved, the toner scattering is suppressed, and the reliability of the entire apparatus is improved.
【0020】また、攪拌部4のケーシング部材端部43
は磁石ロール32a、32bによる磁場の中に配置され
て磁化されているため、この先端部に現像剤の磁気穂4
6が形成され、この磁気穂によってバケットローラ12
のバケット14によって現像部3へ供給される現像剤量
が所定量に規制されるという利点もある。換言すれば、
部材端部43とバケットローラ12の最外周運動軌跡円
Cとの間隙Gは、ここに形成される磁気穂によってバケ
ット14による現像部3への現像剤供給量を規制できる
間隙に設定してある。Further, the casing member end 43 of the stirring section 4
Is placed in a magnetic field by the magnet rolls 32a and 32b and magnetized, so that the magnetic brush 4 of the developer is attached to the tip of this magnet roll.
6 is formed, and the bucket roller 12 is formed by this magnetic brush.
There is also an advantage that the amount of the developer supplied to the developing unit 3 is regulated to a predetermined amount by the bucket 14. In other words,
The gap G between the member end portion 43 and the outermost peripheral movement locus circle C of the bucket roller 12 is set to a gap in which the amount of developer supplied to the developing unit 3 by the bucket 14 can be regulated by the magnetic brush formed here. ..
【0021】なお、このような磁気穂の効果を高めるた
め、図3に示すように、ケーシング部材端部に別途マグ
ネットシートMS等を貼り付け、これにより形成される
磁気穂を利用してもよい。In order to enhance the effect of such a magnetic brush, as shown in FIG. 3, a magnet sheet MS or the like may be separately attached to the end portion of the casing member, and the magnetic brush thus formed may be used. ..
【0022】[0022]
【発明の効果】本発明によると、現像剤供給部から供給
される現像剤を現像剤規制部材にて搬送量を規制しつつ
磁石体の周囲を回転する現像スリーブ上に保持して現像
領域へ搬送する一方、前記規制部材にて搬送を阻止した
現像剤を現像剤攪拌部へ受け入れ、ここに補給されるト
ナーと混合攪拌して前記現像剤供給部へ戻すようにした
二成分現像装置において、前記現像剤攪拌部における現
像剤の流動性を向上させ、それによって現像剤の混合、
攪拌を円滑化してトナーの荷電性を安定させ、画質を向
上させることができるとともに、トナー飛散を抑制で
き、装置の信頼性を向上させることができる。According to the present invention, the developer supplied from the developer supply unit is held on the developing sleeve rotating around the magnet body while controlling the conveying amount by the developer restricting member to reach the developing area. In the two-component developing device configured to receive the developer whose conveyance is blocked by the regulating member into the developer agitating section while being conveyed, and mix and agitate the toner replenished therein, and to return the mixture to the developer supplying section, Improving the fluidity of the developer in the developer stirring section, thereby mixing the developer,
The stirring can be smoothed, the chargeability of the toner can be stabilized, the image quality can be improved, the toner scattering can be suppressed, and the reliability of the apparatus can be improved.
【図1】本発明の一実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図2】図1に示す現像装置の一部拡大断面図である。FIG. 2 is a partially enlarged sectional view of the developing device shown in FIG.
【図3】本発明の他の実施例の一部の拡大断面図であ
る。FIG. 3 is a partial enlarged cross-sectional view of another embodiment of the present invention.
1 現像剤供給部 12 バケットローラ 3 現像部 32a、32b 磁石ロール 33a、33b 現像スリーブ 35 穂高規制部材 4 現像剤攪拌部 41 ケーシング部材 42、43 部材41の端部 45 攪拌ローラ 46 磁気穂 5 トナー補給部 A 現像装置 1 Developer Supply Section 12 Bucket Roller 3 Development Section 32a, 32b Magnet Roll 33a, 33b Development Sleeve 35 Ear Height Controlling Member 4 Developer Stirring Section 41 Casing Member 42, 43 End of Member 45 45 Stir Roller 46 Magnetic Ear 5 Toner Replenishment Part A developing device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松浦 昌彦 大阪市中央区安土町二丁目3番13号 大阪 国際ビルミノルタカメラ株式会社内 (72)発明者 三河 進 大阪市中央区安土町二丁目3番13号 大阪 国際ビルミノルタカメラ株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Matsuura 2-3-13 Azuchi-cho, Chuo-ku, Osaka Within Osaka Kokusai Building Minolta Camera Co., Ltd. (72) Inventor Susumu Mikawa 2-chome, Azuchi-cho, Chuo-ku, Osaka No. 13 Osaka International Building Minolta Camera Co., Ltd.
Claims (1)
像剤規制部材にて搬送量を規制しつつ磁石体の周囲を回
転する現像スリーブ上に保持して現像領域へ搬送する一
方、前記規制部材にて搬送を阻止した現像剤を現像剤攪
拌部へ受け入れ、ここに補給されるトナーと混合攪拌し
て前記現像剤供給部へ戻すようにした二成分現像装置に
おいて、前記現像剤攪拌部のケーシング部材を磁性材料
にて構成したことを特徴とする二成分現像装置。Claim: What is claimed is: 1. A developing area in which a developer supplied from a developer supplying section is held on a developing sleeve that rotates around a magnet body while a conveyance amount is regulated by a developer regulating member. In the two-component developing device, the developer, which has been conveyed by the regulating member, is received in the developer stirring section, mixed and stirred with the toner replenished there, and returned to the developer supplying section. A two-component developing device, wherein the casing member of the developer stirring section is made of a magnetic material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3158970A JPH056098A (en) | 1991-06-28 | 1991-06-28 | Two component developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3158970A JPH056098A (en) | 1991-06-28 | 1991-06-28 | Two component developing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH056098A true JPH056098A (en) | 1993-01-14 |
Family
ID=15683356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3158970A Withdrawn JPH056098A (en) | 1991-06-28 | 1991-06-28 | Two component developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH056098A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543889B2 (en) * | 1985-12-31 | 1993-07-02 | Daburyuu Hyuuzu Robaato | |
US20090196659A1 (en) * | 2008-02-05 | 2009-08-06 | Brother Kogyo Kabushiki Kaisha | Image Forming Apparatus and Developing Apparatus |
-
1991
- 1991-06-28 JP JP3158970A patent/JPH056098A/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543889B2 (en) * | 1985-12-31 | 1993-07-02 | Daburyuu Hyuuzu Robaato | |
US20090196659A1 (en) * | 2008-02-05 | 2009-08-06 | Brother Kogyo Kabushiki Kaisha | Image Forming Apparatus and Developing Apparatus |
US8437667B2 (en) * | 2008-02-05 | 2013-05-07 | Brother Kogyo Kabushiki Kaisha | Developing apparatus capable of stirring old and new developer and image forming apparatus having the developing apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980903 |