JPH112961A - Electrostatic latent image developing device for image forming machine - Google Patents
Electrostatic latent image developing device for image forming machineInfo
- Publication number
- JPH112961A JPH112961A JP9154733A JP15473397A JPH112961A JP H112961 A JPH112961 A JP H112961A JP 9154733 A JP9154733 A JP 9154733A JP 15473397 A JP15473397 A JP 15473397A JP H112961 A JPH112961 A JP H112961A
- Authority
- JP
- Japan
- Prior art keywords
- developing
- sleeve member
- developer
- support shaft
- image carrier
- 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)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、静電式複写機やレ
ーザ式印刷機の如き画像形成機において静電潜像をトナ
ー像に現像するための静電潜像現像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic latent image developing apparatus for developing an electrostatic latent image into a toner image in an image forming machine such as an electrostatic copying machine or a laser printer.
【０００２】[0002]
【従来の技術】静電複写機やレーザ式印刷機の如き画像
形成機においては、周知の如く、像担持体上に静電潜像
を形成し、この静電潜像をトナー像に現像している。こ
のような現像作用は像担持体が現像域を通して移動せし
められる際に、像担持体上に現像剤適用手段によって現
像剤を適用することによって遂行される。画像形成速度
の向上に対応して、像担持体上に現像剤を確実に適用す
るために複数個の現像剤適用手段を具備する静電潜像現
像装置が提案されている。例えば特開昭６０−６８３６
４号公報および特開平３−３１８７６号公報には、２個
の現像剤適用手段を具備する静電潜像現像装置が開示さ
れている。これらの公報に開示された静電潜像現像装置
は、現像域において像担持体と対向して配置された第１
の現像剤適用手段と、該第１の現像剤適用手段に対して
像担持体の移動方向下流側、即ち第１の現像剤適用手段
の下方に像担持体と対向して配置された第２の現像剤適
用手段とを具備し、該２個の現像剤適用手段によって像
担持体上にキャリア粒子とトナーとから成る現像剤を適
用し、静電潜像をトナー像に現像する。2. Description of the Related Art In an image forming machine such as an electrostatic copying machine or a laser printer, as is well known, an electrostatic latent image is formed on an image carrier, and this electrostatic latent image is developed into a toner image. ing. Such a developing action is performed by applying a developer to the image carrier by a developer applying unit when the image carrier is moved through the development area. There has been proposed an electrostatic latent image developing apparatus including a plurality of developer applying means for reliably applying a developer onto an image carrier in response to an increase in image forming speed. For example, JP-A-60-6836
Japanese Patent Application Laid-open No. 4 and Japanese Patent Application Laid-Open No. 3-31876 disclose an electrostatic latent image developing device having two developer applying means. The electrostatic latent image developing devices disclosed in these publications are provided with a first latent image developing device disposed in a developing area so as to face an image carrier.
Developer application means and a second developer application means disposed downstream of the first developer application means in the moving direction of the image carrier, that is, below the first developer application means and opposed to the image carrier. And a developer composed of carrier particles and toner is applied to the image carrier by the two developer application units, and the electrostatic latent image is developed into a toner image.
【０００３】上述したように複数個の現像剤適用手段を
具備した静電潜像現像装置においては、全ての現像剤適
用手段を構成するスリーブ部材と像担持体との間に所定
の隙間（現像ギャップ）が確保されていることが重要で
ある。現像ギャップを確保する機構としては、複数個の
現像剤適用手段の一つは支持軸が現像ハウジングに移動
不可能に支持され、現像ハウジングが像担持体に向けて
付勢されると現像ギャップ調整手段によってスリーブ部
材と像担持体との間に所定の隙間が形成されるように構
成されており、他の現像剤適用手段は支持軸が現像ハウ
ジングに位置調整可能に構成された軸受に支持されてい
る。In an electrostatic latent image developing apparatus having a plurality of developer applying means as described above, a predetermined gap (development) is provided between a sleeve member and an image carrier constituting all the developer applying means. It is important that gaps are secured. As a mechanism for securing the developing gap, one of the plurality of developer applying units is configured such that the support shaft is immovably supported by the developing housing and the developing gap is adjusted when the developing housing is urged toward the image carrier. A predetermined gap is formed between the sleeve member and the image carrier by the means, and the other developer applying means is supported by a bearing whose support shaft is configured to be adjustable in the developing housing. ing.
【０００４】また、上記現像ギャップを調整する機構と
して、複数個の現像剤適用手段を構成する各支持軸の両
端部にスリーブ部材より大径の現像ギャップ規制コロを
各々装着し、この現像ギャップ規制コロを像担持体に当
接することにより、スリーブ部材と像担持体との間に所
定の隙間を確保する構成のものも提案されている。As a mechanism for adjusting the developing gap, a developing gap regulating roller having a diameter larger than that of a sleeve member is attached to each end of each support shaft constituting a plurality of developer applying means. There has also been proposed a configuration in which a predetermined gap is secured between the sleeve member and the image carrier by contacting the rollers with the image carrier.
【０００５】[0005]
【発明が解決しようとする課題】而して、上述した前者
の現像ギャップ調整機構においては、製造時に上記一つ
の現像剤適用手段については現像ギャップ調整手段によ
ってスリーブ部材と像担持体との隙間を調整するととも
に、他の現像剤適用手段についても上記軸受の位置を調
整してスリーブ部材と像担持体との隙間を調整する必要
があり、調整作業が面倒である。In the former developing gap adjusting mechanism, the gap between the sleeve member and the image carrier is reduced by the developing gap adjusting means during the manufacturing. In addition to the adjustment, it is necessary to adjust the gap between the sleeve member and the image carrier by adjusting the position of the bearing with respect to the other developer application means, and the adjustment operation is troublesome.
【０００６】また、上述した後者の現像ギャップ調整機
構においては、現像ギャップ規制コロを備えた複数個の
現像剤適用手段を具備しているため、像担持体に先に当
接した現像ギャップ規制コロを支点として現像ハウジン
グを傾斜せしめる構成にする必要があり、その支持機構
が複雑となる。In the latter developing gap adjusting mechanism described above, since a plurality of developer applying means having a developing gap regulating roller are provided, the developing gap regulating roller which first comes into contact with the image carrier is used. It is necessary to adopt a configuration in which the developing housing is inclined with the fulcrum as a fulcrum.
【０００７】更に、上述した静電潜像現像装置において
は、現像剤適用手段を構成するスリーブ部材に磁気的に
汲み上げられる現像剤を所定の層厚に規制する穂切手段
を設ける必要があり、この穂切手段とスリーブ部材を所
定の位置関係に維持しておくことが重要である。Further, in the above-described electrostatic latent image developing apparatus, it is necessary to provide a sleeve member constituting the developer applying means with a cut-off means for restricting the magnetically pumped developer to a predetermined layer thickness. It is important to keep the ear cutting means and the sleeve member in a predetermined positional relationship.
【０００８】本発明は上記事実に鑑みてなされたもので
あり、その技術的課題は、現像ギャップの調整が容易
で、かつ、現像剤適用手段を構成するスリーブ部材と穂
切手段の位置関係を維持することができる画像形成機の
静電潜像現像装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem thereof is that the adjustment of the developing gap is easy, and the positional relationship between the sleeve member constituting the developer applying means and the ear cutting means. An object of the present invention is to provide an electrostatic latent image developing device for an image forming machine that can maintain the electrostatic latent image developing device.
【０００９】[0009]
【課題を解決するための手段】上記技術的課題を達成す
るために、本発明によれば、現像ハウジングと、該現像
ハウジング内に配設され回転駆動せしめられるスリーブ
部材と該スリーブ部材を支持する支持軸および該スリー
ブ部材内に配設された磁石手段とから構成された複数個
の現像剤適用手段を具備し、該複数個の現像剤適用手段
を機体に装着された像担持体と対向して配設した画像形
成機の静電潜像現像装置において、該複数個の現像剤適
用手段の一つは、該支持軸が該現像ハウジングに移動不
可能に支持され、該現像ハウジングが機体に装着された
状態で機体に配設された現像ギャップ調整手段によって
位置規制されることにより該スリーブ部材と該像担持体
との間に所定の現像ギャップが形成されるように構成さ
れ、他の現像剤適用手段は、該支持軸の両端部に該像担
持体に当接して該スリーブ部材と該像担持体との間に所
定の現像ギャップを形成する現像ギャップ規制部材を備
え、該支持軸が該現像ハウジングに該像担持体に向かっ
て移動可能に支持されているとともに、押圧手段によっ
て該像担持体に向けて付勢されており、該一つの現像剤
適用手段を構成するスリーブ部材に対向して配設され該
スリーブ部材に磁気吸着される現像剤量を規制する穂切
手段を該現像ハウジングに装着した、ことを特徴とする
画像形成機の静電潜像現像装置が提供される。According to the present invention, there is provided, in accordance with the present invention, a developing housing, a sleeve member disposed in the developing housing and driven to rotate, and supporting the sleeve member. A plurality of developer applying means each including a support shaft and magnet means disposed in the sleeve member, wherein the plurality of developer applying means face the image carrier mounted on the body; In the electrostatic latent image developing device of the image forming machine, the one of the plurality of developer applying means is configured such that the support shaft is immovably supported by the developing housing, and the developing housing is attached to the body. The position of the developing member is regulated by the developing gap adjusting means provided on the body in the mounted state, so that a predetermined developing gap is formed between the sleeve member and the image carrier. Suitable The image forming apparatus includes a developing gap regulating member that abuts the image carrier at both ends of the support shaft to form a predetermined developing gap between the sleeve member and the image carrier. The housing is movably supported toward the image carrier, is urged toward the image carrier by a pressing unit, and faces a sleeve member constituting the one developer applying unit. An electrostatic latent image developing device for an image forming machine is provided, wherein a cutting means for regulating the amount of developer magnetically attracted to the sleeve member is mounted on the developing housing.
【００１０】また、本発明によれば、現像ハウジング
と、該現像ハウジング内に配設され回転駆動せしめられ
るスリーブ部材と該スリーブ部材を回転自在に支持する
支持軸および該スリーブ部材内に配設された磁石手段と
から構成された２個の現像剤適用手段を具備し、該２個
の現像剤適用手段を機体に装着された像担持体と対向し
て配設した画像形成機の静電潜像現像装置において、一
方の現像剤適用手段は、該支持軸が該現像ハウジングに
移動不可能に支持され、該現像ハウジングが機体に装着
された状態で機体に配設された現像ギャップ調整手段に
よって位置規制されることにより該スリーブ部材と該像
担持体との間に所定の現像ギャップが形成されるように
構成され、他方の現像剤適用手段は、該支持軸の両端部
に該像担持体に当接して該スリーブ部材と該像担持体と
の間に所定の現像ギャップを形成する現像ギャップ規制
部材を備え、該支持軸が該一方の現像剤適用手段を構成
する該支持軸に一端部が回動可能に支持され押圧手段に
よって該像担持体に向けて押圧されている支持部材に支
持されており、該一方の現像剤適用手段を構成するスリ
ーブ部材に対向して配設され該スリーブ部材に磁気吸着
される現像剤量を規制する穂切手段を該現像ハウジング
に装着した、ことを特徴とする画像形成機の静電潜像現
像装置が提供される。Further, according to the present invention, a developing housing, a sleeve member provided in the developing housing and driven to rotate, a support shaft rotatably supporting the sleeve member, and a support shaft provided in the sleeve member are provided. And an electrostatic latent image forming apparatus provided with two developer applying means, each of which is arranged opposite to an image bearing member mounted on the image forming apparatus. In the image developing device, one of the developer applying units is supported by the developing housing in such a manner that the support shaft is immovably supported by the developing housing, and the developing housing is mounted on the main body. The position is regulated so that a predetermined developing gap is formed between the sleeve member and the image carrier, and the other developer applying means is provided at both ends of the support shaft. Abut A developing gap regulating member for forming a predetermined developing gap between the sleeve member and the image bearing member, and one end of the supporting shaft is rotated at one end of the supporting shaft constituting the one developer applying unit. Supported by a supporting member urged toward the image carrier by pressing means, and disposed opposite to the sleeve member constituting the one developer applying means, and a magnetic member is provided on the sleeve member. An electrostatic latent image developing device for an image forming machine is provided, wherein an ear-cutting means for regulating an amount of a developer to be attracted is attached to the developing housing.
【００１１】更に、本発明によれば、現像ハウジング
と、該現像ハウジング内に配設され回転駆動せしめられ
るスリーブ部材と該スリーブ部材を支持する支持軸およ
び該スリーブ部材内に配設された磁石手段とから構成さ
れた現像剤適用手段を具備し、該現像剤適用手段を機体
に装着された像担持体と対向して配設した画像形成機の
静電潜像現像装置において、該現像剤適用手段は、該支
持軸の両端部に該像担持体に当接して該スリーブ部材と
該像担持体との間に所定の現像ギャップを形成する現像
ギャップ規制部材を備え、該支持軸が該現像ハウジング
に該像担持体に向かって移動可能に支持されているとと
もに、押圧手段によって該像担持体に向けて付勢されて
おり、該現像剤適用手段を構成するスリーブ部材に対向
して配設され該スリーブ部材に磁気吸着される現像剤量
を規制する穂切手段が該支持軸に装着されている、こと
を特徴とする画像形成機の静電潜像現像装置が提供され
る。Further, according to the present invention, a developing housing, a sleeve member provided in the developing housing and driven to rotate, a support shaft for supporting the sleeve member, and magnet means provided in the sleeve member And an electrostatic latent image developing device of an image forming machine, wherein the developer applying means is provided opposite to an image carrier mounted on the machine body. The image forming apparatus includes a developing gap regulating member that abuts the image carrier at both ends of the support shaft to form a predetermined developing gap between the sleeve member and the image carrier. The housing is movably supported toward the image carrier by the housing, and is urged toward the image carrier by a pressing means, and is disposed to face a sleeve member constituting the developer applying means. The pickpocket Ear switching means for regulating the amount of developer is magnetically attracted to the blanking member is attached to the support shaft, an electrostatic latent image developing device of an image forming apparatus, wherein there is provided that.
【００１２】[0012]
【発明の実施の形態】以下、本発明に従って構成された
画像形成機の静電潜像現像装置の好適な実施形態を図示
している添付図面を参照して、更に詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an electrostatic latent image developing apparatus for an image forming machine constructed in accordance with the present invention will be described below in more detail with reference to the accompanying drawings.
【００１３】図１には、画像形成機の像担持体を構成す
る回転ドラム２の一部と共に、本発明に従って構成され
た静電潜像現像装置の好適実施形態が図示されている。
像担持体としての回転ドラム２は、周表面に適宜の静電
感光体が配設されており、図示しない適宜の駆動手段に
よって図において矢印４で示す方向に回転せしめられ
て、現像域６を通過するように構成されている。現像域
６は、回転ドラム２の周表面の移動方向（従って、像担
持体の移動方向）において上下方向に延在せしめられて
おり、従って、図において矢印４で示す方向に回転せし
められる回転ドラム２の周表面は、上方から下方に向け
て現像域６を移動せしめられる。この現像域６の上流側
において、回転ドラム２の周表面上にそれ自体は周知の
適宜の静電潜像形成手段によって静電潜像が形成され
る。現像域６においては、全体を番号８で示す本発明に
従って構成された静電潜像現像装置によって、回転ドラ
ム２の周表面上に形成された静電潜像がトナー像に現像
される。このようにして現像されたトナー像は、現像域
６の下流側において、転写手段によって普通紙等の転写
部材に転写される。FIG. 1 shows a preferred embodiment of an electrostatic latent image developing apparatus constructed according to the present invention, together with a part of a rotary drum 2 constituting an image carrier of an image forming machine.
The rotating drum 2 as an image carrier has an appropriate electrostatic photoreceptor disposed on a peripheral surface thereof, and is rotated in a direction indicated by an arrow 4 in FIG. It is configured to pass. The developing zone 6 extends in the vertical direction in the direction of movement of the peripheral surface of the rotary drum 2 (therefore, the direction of movement of the image carrier), and is therefore rotated in the direction indicated by arrow 4 in the figure. The peripheral surface of No. 2 moves the developing zone 6 downward from above. On the upstream side of the developing area 6, an electrostatic latent image is formed on the peripheral surface of the rotating drum 2 by a suitable electrostatic latent image forming means known per se. In the developing area 6, the electrostatic latent image formed on the peripheral surface of the rotary drum 2 is developed into a toner image by an electrostatic latent image developing device generally designated by the numeral 8 according to the present invention. The toner image thus developed is transferred to a transfer member such as plain paper by a transfer unit on the downstream side of the development area 6.
【００１４】図１乃至図３を参照して説明を続けると、
静電潜像現像装置８は現像ハウジング１０を具備してい
る。この現像ハウジング１０は、最前部（図１において
最左部）に開口１１が設けられており、該開口１１が回
転ドラム２に対向するように画像形成機の図示しない機
体に配設されている。なお、現像ハウジング１０は、画
像形成機の機体に配設された押圧スプリング２０によっ
て矢印２１で示す方向、即ち回転ドラム２に向けて押圧
されている。Continuing the description with reference to FIGS. 1 to 3,
The electrostatic latent image developing device 8 includes a developing housing 10. The developing housing 10 is provided with an opening 11 at the forefront (the leftmost part in FIG. 1), and is disposed on a body (not shown) of the image forming machine such that the opening 11 faces the rotating drum 2. . The developing housing 10 is pressed by a pressing spring 20 provided on the body of the image forming machine in a direction indicated by an arrow 21, that is, toward the rotating drum 2.
【００１５】現像ハウジング１０の前部（図１において
左部）には、第１の現像剤適用手段３０と該第１の現像
剤適用手段３０の下方に配置された第２の現像剤適用手
段４０とが配設されている。第１の現像剤適用手段３０
は、実質上水平に幅方向（図１において紙面に垂直な方
向）に延在して回転ドラム２と平行に配設されたスリー
ブ部材３１と、このスリーブ部材３１内に配設された磁
石手段３２と、支持軸３３とから構成されている。スリ
ーブ部材３１はアルミニウム等の非磁性材によって形成
され、現像ハウジング１０に回転自在に装着されてお
り、図示しない駆動機構によって矢印３４で示す方向、
即ち上記現像域６において上記回転ドラム２の移動に対
して逆方向に移動するように回転駆動せしめられる。上
記磁石手段３２は静止永久磁石によって構成されてお
り、スリーブ部材３１内の所定位置に固定される。この
磁石手段３２を構成する静止永久磁石の断面形状は円形
ではなく、図１において右側部には扇状欠損部３２ａが
存在する。このように構成された磁石手段３２としての
静止永久磁石の外周面には、図１に示すように、Ｓ極と
Ｎ極とが交互に形成されている。静止永久磁石の上記欠
損部３２ａの存在に起因して、スリーブ部材３１の図１
において右側部には、スリーブ部材３１の表面に現像剤
を吸引するための磁気吸引力が実質上存在しない或いは
存在するとしても僅かである現像剤剥離域３５が形成さ
れている。上記スリーブ部材３１および磁石手段３２を
支持する支持軸３３は、その両端部が現像ハウジング１
０の手前側および奥側の側壁１２、１２に支持されてい
る。A first developer applying means 30 and a second developer applying means disposed below the first developer applying means 30 are provided at a front part (left part in FIG. 1) of the developing housing 10. 40 are provided. First developer applying means 30
Is a sleeve member 31 extending substantially horizontally in the width direction (perpendicular to the plane of FIG. 1) and disposed in parallel with the rotary drum 2, and magnet means disposed in the sleeve member 31. 32 and a support shaft 33. The sleeve member 31 is formed of a non-magnetic material such as aluminum, and is rotatably mounted on the developing housing 10.
That is, it is driven to rotate in the developing area 6 so as to move in the direction opposite to the movement of the rotary drum 2. The magnet means 32 is constituted by a stationary permanent magnet, and is fixed at a predetermined position in the sleeve member 31. The cross-sectional shape of the stationary permanent magnet constituting the magnet means 32 is not circular, and a fan-shaped missing portion 32a exists on the right side in FIG. As shown in FIG. 1, S poles and N poles are alternately formed on the outer peripheral surface of the stationary permanent magnet as the magnet means 32 configured as described above. Due to the presence of the missing portion 32a of the stationary permanent magnet, the sleeve member 31 shown in FIG.
In the right part, a developer peeling area 35 is formed on the surface of the sleeve member 31 where the magnetic attraction force for sucking the developer is substantially absent or little if any. The support shaft 33 supporting the sleeve member 31 and the magnet means 32 has both ends at the developing housing 1.
0 are supported by the front and rear side walls 12, 12.
【００１６】上記スリーブ部材３１および磁石手段３２
を支持する支持軸３３は、その両端部が現像ハウジング
１０の手前側および奥側の側壁１２、１２に前後方向、
即ち回転ドラム２の軸線に対して直交する方向に移動可
能に支持されている。即ち、現像ハウジング１０の手前
側および奥側の側壁１２、１２には図２に示すように前
後方向に長い長穴１２ａ、１２ａが設けられており、こ
の長穴１２ａ、１２ａに支持軸３３の両端部が各々挿入
される。そして、支持軸３３の両端部は押圧手段として
のスプリング４６、４６によって図において左方、即ち
回転ドラム２に向けて押圧されている。図示の実施形態
における第１の現像剤適用手段３０は、スリーブ部材３
１の両側において支持軸３３の両端部に各々装着された
現像ギャップ規制部材としての現像ギャップ規制コロ４
７、４７を具備している。この現像ギャップ規制コロ４
７、４７は、その外径がスリーブ部材３１の外径より僅
かに大径に構成されている。従って、上記スプリング４
６、４６によって支持軸３３が回転ドラム２に向けて押
圧されることにより、現像ギャップ規制コロ４７、４７
が回転ドラム２の周表面に当接して、回転ドラム２の周
表面とスリーブ部材３１の周表面との間には所定の現像
ギャップＤＧ１が形成される。The sleeve member 31 and the magnet means 32
The support shaft 33 supports the front and rear sides of the support shaft 33 on the front and rear side walls 12, 12 of the developing housing 10.
That is, it is supported so as to be movable in a direction orthogonal to the axis of the rotating drum 2. That is, as shown in FIG. 2, long holes 12 a, 12 a long in the front-rear direction are provided on the front and rear side walls 12, 12 of the developing housing 10, and the support shaft 33 is provided in the long holes 12 a, 12 a. Both ends are inserted respectively. Both ends of the support shaft 33 are pressed leftward in the figure, that is, toward the rotating drum 2 by springs 46, 46 as pressing means. The first developer applying unit 30 in the illustrated embodiment includes a sleeve member 3.
The developing gap regulating rollers 4 as developing gap regulating members respectively attached to both ends of the support shaft 33 on both sides of the developing shaft 1
7 and 47 are provided. This developing gap regulating roller 4
The outer diameters of the sleeves 7 and 47 are slightly larger than the outer diameter of the sleeve member 31. Therefore, the spring 4
When the support shaft 33 is pressed toward the rotary drum 2 by the rollers 6 and 46, the developing gap regulating rollers 47 and 47 are pressed.
Abuts on the peripheral surface of the rotary drum 2 to form a predetermined developing gap DG1 between the peripheral surface of the rotary drum 2 and the peripheral surface of the sleeve member 31.
【００１７】上記第２の現像剤適用手段４０は、上記現
像域６において第１の現像剤適用手段３０に対して上記
回転ドラム２の移動方向下流側（図１において第１の現
像剤適用手段３０の下側）に配設されている。この第２
の現像剤適用手段４０も上記第１の現像剤適用手段３０
と同様に、実質上水平に幅方向（図１において紙面に垂
直な方向）に延在して回転ドラム２と平行に配設された
スリーブ部材４１と、このスリーブ部材４１内に配設さ
れた磁石手段４２と、支持軸４３とから構成されてい
る。スリーブ部材４１はアルミニウム等の非磁性材によ
って形成され、現像ハウジング１０に回転自在に装着さ
れており、図示しない駆動機構によって矢印４４で示す
方向、即ち上記現像域６において上記回転ドラム２の移
動に対して順方向に移動するように回転駆動せしめられ
る。上記磁石手段４２は静止永久磁石によって構成され
ており、スリーブ部材４１内の所定位置に固定される。
この磁石手段４２を構成する静止永久磁石の周表面に
は、図１に示すように、順次に位置するＳ極、Ｎ極、Ｓ
極、Ｎ極およびＳ極が形成されている。従って、図１に
示す実施形態においては、右側下部ではＳ極とＳ極とが
隣接し、この隣接するＳ極間の部位には、スリーブ部材
４１の表面に現像剤を吸引するための磁気吸引力が実質
上存在しない或いは僅かである現像剤剥離域４５が規定
されている。The second developer application unit 40 is located downstream of the first developer application unit 30 in the moving direction of the rotary drum 2 in the development zone 6 (the first developer application unit in FIG. 1). 30 below). This second
Of the first developer applying means 30
Similarly to the above, the sleeve member 41 extends substantially horizontally in the width direction (the direction perpendicular to the paper surface in FIG. 1) and is disposed in parallel with the rotary drum 2, and is disposed in the sleeve member 41. It is composed of magnet means 42 and a support shaft 43. The sleeve member 41 is formed of a non-magnetic material such as aluminum, and is rotatably mounted on the developing housing 10. On the other hand, it is rotationally driven to move in the forward direction. The magnet means 42 is constituted by a stationary permanent magnet, and is fixed at a predetermined position in the sleeve member 41.
On the peripheral surface of the stationary permanent magnet constituting the magnet means 42, as shown in FIG.
A pole, a north pole and a south pole are formed. Therefore, in the embodiment shown in FIG. 1, the S pole and the S pole are adjacent at the lower right side, and the magnetic attraction for sucking the developer onto the surface of the sleeve member 41 is provided between the adjacent S poles. A developer stripping area 45 is defined in which there is substantially no or little force.
【００１８】次に、上記第２の現像剤適用手段４０のス
リーブ部材４１と回転ドラム２の周表面との間に所定の
現像ギャップＤＧ２を形成する現像ギャップ調整手段５
０について図３を参照して説明する。なお、図３には手
前側の側壁１２に装着された現像ギャップ調整手段５０
のみが示されているが、奥側の側壁１２に装着された現
像ギャップ調整手段５０も実質的に同一の構成である。
現像ギャップ調整手段５０は、画像形成機の機体に装着
される現像ハウジング１０の手前側および奥側において
上記第２の現像剤適用手段４０と対向する位置で機体に
各々取り付けられた本体５１を備えている。この本体５
１には、当接部材収容空間５１ａが形成されているとと
もに、該当接部材収容空間５１ａの上下方向中間部から
水平方向に開口５１ｂが形成されている。なお、開口５
１ｂの上下方向の幅は、上記第２の現像剤適用手段４０
の支持軸４３が挿通し得る寸法に形成されている。上記
当接部材収容空間５１ａには、当接面５２ａが上下方向
に傾斜して形成された（図示の実施形態においては、上
方から下方にいくに従い回転ドラム２側に向けて傾斜し
ている）当接部材５２が上下方向に移動可能に配設され
ている。この当接部材５２には、上下方向に貫通して形
成されたねじ穴５２ｂが設けられている。当接部材５２
に設けられたねじ穴５２ｂには、本体５１に当接部材収
容空間５１ａを上下方向に貫通して回転自在に配設され
た調整ねじ５３が螺合している。なお、調整ねじ５３の
下端には抜け止め部材５４が装着されている。Next, a developing gap adjusting means 5 for forming a predetermined developing gap DG2 between the sleeve member 41 of the second developer applying means 40 and the peripheral surface of the rotary drum 2.
0 will be described with reference to FIG. FIG. 3 shows the developing gap adjusting means 50 mounted on the side wall 12 on the near side.
Only the developing gap adjusting means 50 mounted on the rear side wall 12 has substantially the same configuration.
The developing gap adjusting means 50 includes a main body 51 attached to the body of the image forming machine at a position facing the second developer applying means 40 on the front side and the back side of the developing housing 10 mounted on the body of the image forming machine. ing. This body 5
1, a contact member accommodating space 51a is formed, and an opening 51b is formed in a horizontal direction from a vertically intermediate portion of the contact member accommodating space 51a. The opening 5
The width of the first developer applying means 40b in the vertical direction is
The support shaft 43 is formed in such a size that it can be inserted. A contact surface 52a is formed in the contact member accommodating space 51a so as to be inclined in the vertical direction (in the illustrated embodiment, the contact surface 52a is inclined toward the rotary drum 2 from the upper side to the lower side). The contact member 52 is provided so as to be movable in the vertical direction. The contact member 52 is provided with a screw hole 52b penetrating vertically. Contact member 52
An adjustment screw 53 rotatably disposed through the contact member housing space 51a in the main body 51 in the up-down direction is screwed into the screw hole 52b provided in the main body 51. In addition, a retaining member 54 is attached to the lower end of the adjusting screw 53.
【００１９】図示の実施形態における現像ギャップ調整
手段５０は以上のように構成されており、上記現像ギャ
ップＤＧ２を次のように行う。静電潜像現像装置８が画
像形成機の機体に装着され、上記押圧スプリング２０に
よって矢印２１で示す方向、即ち回転ドラム２に向けて
押圧されると、上記第２の現像剤適用手段４０の支持軸
４３が本体５１に形成された開口５１ｂに挿入され、当
接部材５２の当接面５２ａに当接する。これにより、第
２の現像剤適用手段４０のスリーブ部材４１と回転ドラ
ム２の周表面との間に隙間が形成される。この隙間が所
定の現像ギャップＤＧ２より大きい場合は、調整ねじ５
３を右回りに回動すると、当接部材５２が図３において
上方に移動せしめられる。当接部材５２が図３において
上方に移動すると、当接面５２ａが図示の実施形態にお
いては上方から下方にいくに従い回転ドラム２側に向け
て傾斜しているので、当接面５２ａに当接している支持
軸４３が回転ドラム２側に移動してスリーブ部材４１と
回転ドラム２の周表面との間の隙間は小さくなり、この
隙間が所定の現像ギャップＤＧ２に達したとき調整ねじ
５３の回動を停止することにより、所定の現像ギャップ
ＤＧ２に調整することができる。一方、静電潜像現像装
置８を画像形成機の機体に装着したとき、第２の現像剤
適用手段４０のスリーブ部材４１と回転ドラム２の周表
面との間の隙間が所定の現像ギャップＤＧ２より小さい
場合には、調整ねじ５３を左回りに回動する。これによ
り、当接部材５２が図３において下方に移動せしめら
れ、当接面５２ａに当接している支持軸４３が回転ドラ
ム２と反対側に移動してスリーブ部材４１と回転ドラム
２の周表面との間の隙間は大きくなり、この隙間が所定
の現像ギャップＤＧ２に達したとき調整ねじ５３の回動
を停止することにより、所定の現像ギャップＤＧ２に調
整することができる。なお、第１の現像剤適用手段３０
は、スプリング４６、４６によって支持軸３３が回転ド
ラム２に向けて押圧されているので、該支持軸３３の両
端部に装着された現像ギャップ規制コロ４７、４７が回
転ドラム２の周表面に当接した状態が保持され、上記現
像ギャップＤＧ１が維持される。The developing gap adjusting means 50 in the illustrated embodiment is configured as described above, and performs the developing gap DG2 as follows. When the electrostatic latent image developing device 8 is attached to the body of the image forming machine and is pressed by the pressing spring 20 in the direction indicated by the arrow 21, that is, toward the rotating drum 2, the second developer applying unit 40 The support shaft 43 is inserted into the opening 51 b formed in the main body 51, and comes into contact with the contact surface 52 a of the contact member 52. Thereby, a gap is formed between the sleeve member 41 of the second developer applying unit 40 and the peripheral surface of the rotating drum 2. If this gap is larger than the predetermined developing gap DG2, the adjusting screw 5
When the rotating member 3 is rotated clockwise, the contact member 52 is moved upward in FIG. When the contact member 52 moves upward in FIG. 3, the contact surface 52a is inclined toward the rotating drum 2 from the top to the bottom in the illustrated embodiment, so that the contact member 52 contacts the contact surface 52a. When the support shaft 43 moves toward the rotary drum 2 and the gap between the sleeve member 41 and the peripheral surface of the rotary drum 2 becomes small, when the gap reaches a predetermined developing gap DG2, the rotation of the adjusting screw 53 is performed. By stopping the movement, the predetermined developing gap DG2 can be adjusted. On the other hand, when the electrostatic latent image developing device 8 is mounted on the body of the image forming machine, a gap between the sleeve member 41 of the second developer applying unit 40 and the peripheral surface of the rotary drum 2 is equal to a predetermined developing gap DG2. If smaller, the adjusting screw 53 is rotated counterclockwise. Thereby, the contact member 52 is moved downward in FIG. 3, and the support shaft 43 which is in contact with the contact surface 52a is moved to the opposite side to the rotary drum 2, so that the sleeve member 41 and the peripheral surface of the rotary drum 2 are moved. When the gap reaches a predetermined developing gap DG2, the rotation of the adjusting screw 53 is stopped, whereby the predetermined developing gap DG2 can be adjusted. Note that the first developer applying unit 30
Since the support shaft 33 is pressed toward the rotary drum 2 by the springs 46, the developing gap regulating rollers 47, 47 attached to both ends of the support shaft 33 contact the peripheral surface of the rotary drum 2. The contact state is maintained, and the developing gap DG1 is maintained.
【００２０】図１を参照して説明を続けると、静電潜像
現像装置８には、穂切手段５６が現像ハウジング１０に
配設されている。図示の実施形態においては、穂切手段
５６は、第２の現像剤適用手段４０に沿って幅方向（図
１において紙面に垂直な方向）に延在する穂切板５６１
によって構成されており、現像ハウジング１０の側壁１
２、１２に適宜の取付け手段によって装着されている。
この穂切板５６１は、図示の実施形態においては非磁性
ステンレス鋼から形成されており、第２の現像剤適用手
段４０を構成するスリーブ部材４１の回転方向（矢印４
４で示す方向）に見て現像域６の上流側で、かつ上記第
１の現像剤適用手段３０のスリーブ部材３１と対向する
最接近部位よりも上流側において、スリーブ部材４１の
周表面に近接する先端縁を有する。穂切板５６１の先端
縁とスリーブ部材４１の周表面との隙間Ｇ１は、図示の
実施形態においては１乃至２ｍｍ程度に設定されてい
る。このように図示の実施形態においては、現像ハウジ
ング１０に移動不可能に支持された第２の現像剤適用手
段４０のスリーブ部材４１の周表面に対向して穂切板５
６１が配設されているので、上記現像ギャップＤＧ２を
調整するために第２の現像剤適用手段４０の支持軸４３
の位置、即ち現像ハウジング１０の位置が変位しても、
第２の現像剤適用手段４０のスリーブ部材４１の周表面
と穂切板５６１とは所定の位置関係に維持されている。Continuing the description with reference to FIG. 1, the electrostatic latent image developing device 8 is provided with a head cutting means 56 in the developing housing 10. In the illustrated embodiment, the cutting device 56 is a cutting device 561 that extends in the width direction (the direction perpendicular to the plane of FIG. 1) along the second developer application device 40.
And a side wall 1 of the developing housing 10.
2, 12 are mounted by appropriate mounting means.
In the illustrated embodiment, the ear-cutting plate 561 is made of non-magnetic stainless steel, and rotates in the direction of rotation of the sleeve member 41 that constitutes the second developer applying unit 40 (arrow 4).
4), and close to the peripheral surface of the sleeve member 41 on the upstream side of the developing zone 6 and on the upstream side of the closest part of the first developer application unit 30 facing the sleeve member 31. Having a leading edge. The gap G1 between the leading edge of the ear cutting board 561 and the peripheral surface of the sleeve member 41 is set to about 1 to 2 mm in the illustrated embodiment. As described above, in the illustrated embodiment, the ear cutting plate 5 faces the peripheral surface of the sleeve member 41 of the second developer applying unit 40 that is immovably supported by the developing housing 10.
61, the support shaft 43 of the second developer applying unit 40 is used to adjust the developing gap DG2.
, That is, even if the position of the developing housing 10 is displaced,
The peripheral surface of the sleeve member 41 of the second developer applying unit 40 and the ear cutting board 561 are maintained in a predetermined positional relationship.
【００２１】なお、図示の実施形態においては、上記第
２の現像剤適用手段４０の後方に現像剤攪拌搬送機構５
８が配設されており、該現像剤攪拌搬送機構５８を構成
する下流攪拌搬送手段５８１によって現像剤が攪拌され
つつ第２の現像剤適用手段４０に送られるようになって
いる。In the illustrated embodiment, the developer stirring / conveying mechanism 5 is provided behind the second developer applying means 40.
8 is provided, and the developer is sent to the second developer applying unit 40 while being agitated by the downstream stirring / conveying unit 581 constituting the developer stirring / conveying mechanism 58.
【００２２】次に、上述したとおりの静電潜像現像装置
８の作用について説明する。第２の現像剤適用手段４０
のスリーブ部材４１が矢印４４で示す方向に回転せしめ
られており、図１に番号４９で示す現像剤汲み上げ域に
おいて、下流攪拌搬送手段５８１の作用によって幅方向
に向けて搬送されている現像剤の一部が、第２の磁石手
段４０が形成する磁界に起因してスリーブ部材４１の周
表面に汲み上げられる。スリーブ部材４１の周表面に汲
み上げられた現像剤はスリーブ部材４１の回転に付随し
て矢印４４で示す方向に移動せしめられる。穂切手段５
６を構成する穂切板５６１は、スリーブ部材４１の周表
面に磁気的に保持されて移動せしめられる現像剤に作用
して、過剰の現像剤をスリーブ部材４１から除去し、ス
リーブ部材４１の周表面上に保持される現像剤の層厚を
適切に規制する。第２の現像剤適用手段４０を構成する
スリーブ部材４１と第１の現像剤適用手段３０を構成す
るスリーブ部材３１との最接近部位を通ってスリーブ部
材４１が移動せしめられる際には、スリーブ部材４１の
周表面に保持されている現像剤の一部が、第１の現像剤
適用手段３０の第１の磁石手段３２が形成する磁界に起
因してスリーブ部材３１の周表面に移送される。第１の
現像剤適用手段３０のスリーブ部材３１の周表面に移送
されそこに磁気的に保持された現像剤は、スリーブ部材
３１の矢印３４で示す方向の回転に付随して移動せしめ
られ、従って現像域６の上流半部（図１において上半
部）を通して移動せしめられる。このため、現像域６の
上流半部において、スリーブ部材３１の表面に保持され
た現像剤が回転ドラム２の周表面を摺擦し、回転ドラム
２の周表面に形成されている静電潜像に現像作用が施さ
れる。一方、第１の現像剤適用手段３０のスリーブ部材
３１の周表面に移送されることなく第２の現像剤適用手
段４０のスリーブ部材４１の表面に磁気的に保持され続
けた現像剤は、スリーブ部材４１の矢印４４で示す方向
の回転に付随して移動せしめられ、従って現像域６の下
流半部（図１において下半部）を通して移動せしめられ
る。このため、現像域６の下流半部において、スリーブ
部材４１の周表面に保持された現像剤が回転ドラム２の
周表面を摺擦し、回転ドラム２の周表面に形成されてい
る静電潜像に現像作用が施される。回転ドラム２の周表
面に形成された静電潜像は、現像域６の上流半部におい
て第１の現像剤適用手段３０の現像作用を受け、次いで
現像域６の下流半部において第２の現像剤適用手段４０
の現像作用を受け、トナー像に現像される。なお、第１
の現像剤適用手段３０のスリーブ部材３１と回転ドラム
２との間の現像ギャップＤＧ１および第１の現像剤適用
手段４０のスリーブ部材４１と回転ドラム２との間の現
像ギャップＤＧ２は上記のように適正に保持されている
ので、上記現像作用は常に適正に行われる。Next, the operation of the electrostatic latent image developing device 8 as described above will be described. Second developer applying means 40
Is rotated in the direction indicated by the arrow 44 in the developer pumping area indicated by reference numeral 49 in FIG. 1, and the developer agitated in the width direction by the action of the downstream stirring / conveying means 581. A part is pumped to the peripheral surface of the sleeve member 41 due to the magnetic field formed by the second magnet means 40. The developer pumped to the peripheral surface of the sleeve member 41 is moved in the direction indicated by the arrow 44 accompanying the rotation of the sleeve member 41. Hot cutting means 5
6 acts on the developer magnetically held and moved on the peripheral surface of the sleeve member 41 to remove excess developer from the sleeve member 41, and Appropriately regulate the layer thickness of the developer retained on the surface. When the sleeve member 41 is moved through the closest part between the sleeve member 41 forming the second developer applying unit 40 and the sleeve member 31 forming the first developer applying unit 30, the sleeve member A part of the developer held on the peripheral surface of the sleeve 41 is transferred to the peripheral surface of the sleeve member 31 due to the magnetic field formed by the first magnet unit 32 of the first developer application unit 30. The developer transferred to the peripheral surface of the sleeve member 31 of the first developer applying means 30 and magnetically held therein is moved accompanying rotation of the sleeve member 31 in the direction indicated by the arrow 34, and It is moved through the upstream half (upper half in FIG. 1) of the development zone 6. For this reason, in the upstream half of the developing zone 6, the developer held on the surface of the sleeve member 31 rubs the peripheral surface of the rotary drum 2 to form an electrostatic latent image formed on the peripheral surface of the rotary drum 2. Is subjected to a developing action. On the other hand, the developer which has not been transferred to the peripheral surface of the sleeve member 31 of the first developer applying unit 30 and has been magnetically held on the surface of the sleeve member 41 of the second developer applying unit 40 is a sleeve. The member 41 is moved in association with the rotation in the direction indicated by the arrow 44, and is thus moved through the downstream half (the lower half in FIG. 1) of the development zone 6. For this reason, in the downstream half of the developing zone 6, the developer held on the peripheral surface of the sleeve member 41 rubs the peripheral surface of the rotating drum 2, and the electrostatic latent formed on the peripheral surface of the rotating drum 2. The image is developed. The electrostatic latent image formed on the peripheral surface of the rotating drum 2 is subjected to the developing action of the first developer application means 30 in the upstream half of the developing zone 6, and then is subjected to the second half in the downstream half of the developing zone 6. Developer application means 40
Is developed into a toner image. The first
The developing gap DG1 between the sleeve member 31 of the developer applying unit 30 and the rotary drum 2 and the developing gap DG2 between the sleeve member 41 of the first developer applying unit 40 and the rotary drum 2 are as described above. Since the development is properly maintained, the developing operation is always performed properly.
【００２３】第１の現像剤適用手段３０のスリーブ部材
３１の周表面に保持されて現像域６を通過せしめられた
現像剤は、現像剤剥離域３５において磁気吸引力が実質
上存在しなくなる或いは僅かになることに起因して、ス
リーブ部材３１の表面から離脱されて下方に落下せしめ
られる。一方、上記第２の現像剤適用手段４０のスリー
ブ部材４１の周表面に保持されて現像域６を通過せしめ
られた現像剤は、現像剤剥離域４５において磁気吸引力
が実質上存在しなくなる或いは僅かになることに起因し
て、そして現像剤剥離域４５において下流攪拌搬送手段
５８１によって攪拌搬送されている現像剤がスリーブ部
材４１の周表面に作用することに起因して、スリーブ部
材４１の周表面から離脱せしめられて、下流攪拌搬送手
段５８１によって攪拌搬送されている現像剤に混入さ
れ、そして現像剤汲み上げ域４９において再び第２の現
像剤適用手段４０の第２のスリーブ部材４１の周表面に
汲み上げられる前に効果的に攪拌される。The developer retained on the peripheral surface of the sleeve member 31 of the first developer applying means 30 and passed through the developing zone 6 has substantially no magnetic attraction in the developer stripping zone 35 or Due to the slightness, the sleeve member 31 is detached from the surface of the sleeve member 31 and dropped downward. On the other hand, the developer retained on the peripheral surface of the sleeve member 41 of the second developer applying means 40 and passed through the developing area 6 has substantially no magnetic attraction force in the developer peeling area 45 or Due to the slight amount and the fact that the developer being stirred and conveyed by the downstream stirring and conveying means 581 in the developer stripping area 45 acts on the peripheral surface of the sleeve member 41, The peripheral surface of the second sleeve member 41 of the second developer applying unit 40 is separated from the surface, mixed with the developer being stirred and transported by the downstream stirring and transporting unit 581, and again in the developer pumping area 49. It is effectively agitated before being pumped.
【００２４】次に、上記第１の現像剤適用手段３０を回
転ドラム２に向けて押圧する押圧機構の他の実施形態に
ついて、図４および図５を参照して説明する。なお、図
４および図５に示す実施形態においては、手前側の押圧
機構のみが示されているが、奥側の押圧機構も実質的に
同一の構成である。また、図４および図５に示す実施形
態においては、第２の現像剤適用手段４０の現像ギャッ
プＤＧ２の調整は上記現像ギャップ規制手段５０によっ
て行われる。この実施形態においては、第１の現像剤適
用手段３０の支持軸３３は、その両端部が現像ハウジン
グ１０の側壁１２に装着され支持軸３３の径より大径の
穴６１ａ、６１ａを有する環状の蓋６１を貫通して配設
されている。一方、第２の現像剤適用手段４０の支持軸
４３は、その両端部が現像ハウジング１０の側壁１２に
装着された軸受６２によって回転自在に支持されてい
る。第２の現像剤適用手段４０の支持軸４３の両端部に
は、支持部材６３の一端部が軸受６４を介して回動可能
に装着されている。支持部材６３の他端部には、各々軸
受穴６３ａが設けられており、上記第１の現像剤適用手
段３０の支持軸３３の両端部が該軸受穴６３ａに嵌合さ
れている。従って、第１の現像剤適用手段３０の支持軸
３３の両端部は、支持部材６３の他端部に回転可能に支
持される。このようにして、第１の現像剤適用手段３０
の支持軸３３の両端部と第２の現像剤適用手段４０の支
持軸４３の両端部とを互いに回動可能に連結した支持部
材６３の他端が、各々ばね押圧手段６５によって回転ド
ラム２側に押圧されている。従って、支持部材６３は第
２の現像剤適用手段４０の支持軸４３を中心として図４
において反時計方向に回動すべく付勢されている。な
お、図４には手前側の側壁１２に装着されたばね押圧手
段６５のみが示されているが、奥側の側壁１２にも実質
的に同一の構成の押圧手段６５が配設されている。ばね
押圧手段６５は、ビス６５１、６５１によって側壁１２
に装着されたケーシング６５２と、該ケーシング６５２
内に配設された圧縮コイルばね６５３と、該圧縮コイル
ばね６５３と上記支持部材６３の他端との間に配設され
た押圧部材６５４とからなっており、圧縮コイルばね６
５３のばね力により押圧部材６５４を介して支持部材６
３の他端を回転ドラム２側に押圧する。このように構成
されたばね押圧手段６５、６５によって回転ドラム２側
に押圧される支持部材６３、６３は、第２の現像剤適用
手段４０の支持軸４３を中心として図４において反時計
方向に回動すべく付勢され、従って、支持部材６３に軸
支された支持軸３３の両端部に装着された現像ギャップ
規制コロ４７が回転ドラム２の周表面に当接して、回転
ドラム２の周表面とスリーブ部材３１の周表面との間に
は所定の現像ギャップＤＧ１が形成される。Next, another embodiment of a pressing mechanism for pressing the first developer applying means 30 toward the rotary drum 2 will be described with reference to FIGS. In the embodiments shown in FIGS. 4 and 5, only the front pressing mechanism is shown, but the rear pressing mechanism has substantially the same configuration. 4 and 5, the adjustment of the developing gap DG2 of the second developer applying unit 40 is performed by the developing gap regulating unit 50. In this embodiment, the support shaft 33 of the first developer applying unit 30 is formed in an annular shape having both ends mounted on the side wall 12 of the developing housing 10 and having holes 61 a and 61 a having a diameter larger than the diameter of the support shaft 33. It is arranged so as to penetrate the lid 61. On the other hand, both ends of the support shaft 43 of the second developer application unit 40 are rotatably supported by bearings 62 mounted on the side wall 12 of the development housing 10. One end of a support member 63 is rotatably mounted on both ends of a support shaft 43 of the second developer application unit 40 via a bearing 64. A bearing hole 63a is provided at the other end of the support member 63, and both ends of the support shaft 33 of the first developer applying unit 30 are fitted into the bearing hole 63a. Therefore, both ends of the support shaft 33 of the first developer applying unit 30 are rotatably supported by the other end of the support member 63. Thus, the first developer applying unit 30
The other end of the support member 63, which rotatably connects the both ends of the support shaft 33 of the second member and the two ends of the support shaft 43 of the second developer applying means 40, is turned by the spring pressing means 65 on the rotating drum 2 side. Is pressed. Therefore, the support member 63 is centered on the support shaft 43 of the second developer applying unit 40 in FIG.
Is biased to rotate counterclockwise. FIG. 4 shows only the spring pressing means 65 mounted on the front side wall 12, but the pressing means 65 having substantially the same configuration is also provided on the rear side wall 12. The spring pressing means 65 is fixed to the side wall 12 by screws 651, 651.
A casing 652 attached to the
And a pressing member 654 disposed between the compression coil spring 653 and the other end of the support member 63.
The support member 6 via the pressing member 654 by the spring force of 53
3 is pressed against the rotating drum 2. The support members 63, 63 pressed toward the rotating drum 2 by the spring pressing means 65, 65 configured as described above rotate counterclockwise in FIG. 4 around the support shaft 43 of the second developer application means 40. The developing gap regulating rollers 47 mounted on both ends of the support shaft 33 supported by the support member 63 abut against the peripheral surface of the rotary drum 2, and are urged to move. A predetermined developing gap DG1 is formed between the sleeve member 31 and the peripheral surface of the sleeve member 31.
【００２５】次に、本発明の他の実施形態について、図
６を参照して説明する。なお、上記図１乃至図３に示す
実施形態における同一部材には同一符号を付して、その
詳細な説明は省略する。図６に示す静電潜像現像装置８
は、第１の現像剤適用手段３０のスリーブ部材３１と第
２の現像剤適用手段４０のスリーブ部材４１が共に矢印
で示す方向、即ち上記現像域６において上記回転ドラム
２の移動に対して順方向に移動するように回転駆動せし
められるように構成されている。このように構成された
静電潜像現像装置８においては、穂切手段５６を構成す
る穂切板５６１が第１の現像剤適用手段３０のスリーブ
部材３１と対向して配設され、現像ハウジング１０の側
壁１２に適宜の取付け手段によって装着される。そし
て、第１の現像剤適用手段３０の支持軸３３の両端部
は、現像ハウジング１０の側壁１２に移動不可能に支持
されている。静電潜像現像装置８が画像形成機の機体に
装着され、上記押圧スプリング２０によって矢印２１で
示す方向、即ち回転ドラム２に向けて押圧されると（図
１参照）、上記第２の現像剤適用手段４０の支持軸４３
が現像ギャップ規制手段５０の当接部材５２の当接面５
２ａに当接して位置規制され、第１の現像剤適用手段３
０のスリーブ部材３１と回転ドラム２との現像ギャップ
ＤＧ１が適正に設けられる。一方、第２の現像剤適用手
段４０は、その支持軸４３の両端部が現像ハウジング１
０の側壁１２に前後方向、即ち回転ドラム２の軸線に対
して直交する方向に移動可能に支持されている。即ち、
現像ハウジング１０の側壁１２には図６に示すように前
後方向に長い長穴１２ａが設けられており、この長穴１
２ａに支持軸３３の両端部が各々挿入される。そして、
支持軸４３の両端部はスプリング４６によって図におい
て左方、即ち回転ドラム２に向けて押圧されている。図
示の実施形態における第２の現像剤適用手段４０は、ス
リーブ部材４１の両側において支持軸４３の両端部に各
々装着された現像ギャップ規制コロ４７を具備してい
る。この現像ギャップ規制コロ４７は、その外径がスリ
ーブ部材３１の外径より僅かに大径に構成されている。
従って、上記スプリング４６によって支持軸４３が回転
ドラム２に向けて押圧されることにより、現像ギャップ
規制コロ４７が回転ドラム２の周表面に当接して、回転
ドラム２の周表面とスリーブ部材３１の周表面との間に
は所定の現像ギャップＤＧ２が形成される。図示の実施
形態においては、現像ハウジング１０に移動不可能に支
持された第１の現像剤適用手段３０のスリーブ部材３１
の周表面に対向して穂切板５６１が配設されているの
で、上記現像ギャップＤＧ１を調整するために第１の現
像剤適用手段３０の支持軸４１の位置、即ち現像ハウジ
ング１０の位置が変位しても、第１の現像剤適用手段３
０のスリーブ部材３１の周表面と穂切板５６１とは所定
の位置関係に維持されている。Next, another embodiment of the present invention will be described with reference to FIG. The same members in the embodiments shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof will be omitted. The electrostatic latent image developing device 8 shown in FIG.
That is, the sleeve member 31 of the first developer applying unit 30 and the sleeve member 41 of the second developer applying unit 40 are both directed in the direction indicated by the arrow, that is, in the developing area 6 with respect to the movement of the rotary drum 2. It is configured to be rotationally driven to move in the direction. In the electrostatic latent image developing device 8 configured as described above, the panning plate 561 constituting the panning means 56 is disposed so as to face the sleeve member 31 of the first developer applying unit 30, and the developing housing 10 is attached to the side wall 12 by an appropriate attaching means. Both ends of the support shaft 33 of the first developer applying unit 30 are supported by the side wall 12 of the developing housing 10 so as not to move. When the electrostatic latent image developing device 8 is mounted on the body of the image forming machine and is pressed by the pressing spring 20 in the direction indicated by the arrow 21, that is, toward the rotating drum 2 (see FIG. 1), the second developing device Support shaft 43 of agent application means 40
Is the contact surface 5 of the contact member 52 of the developing gap regulating means 50.
2a, the position of the first developer applying unit 3 is regulated.
The developing gap DG1 between the sleeve member 31 and the rotary drum 2 is properly provided. On the other hand, the second developer applying unit 40 is configured such that both ends of the support shaft 43 are provided in the developing housing 1.
The side wall 12 is supported so as to be movable in the front-rear direction, that is, in the direction perpendicular to the axis of the rotating drum 2. That is,
As shown in FIG. 6, the side wall 12 of the developing housing 10 is provided with a long hole 12a long in the front-rear direction.
Both ends of the support shaft 33 are inserted into 2a. And
Both ends of the support shaft 43 are pressed leftward in the figure, that is, toward the rotating drum 2 by a spring 46. The second developer applying unit 40 in the illustrated embodiment includes developing gap regulating rollers 47 respectively attached to both ends of the support shaft 43 on both sides of the sleeve member 41. The outer diameter of the developing gap regulating roller 47 is slightly larger than the outer diameter of the sleeve member 31.
Accordingly, when the support shaft 43 is pressed toward the rotary drum 2 by the spring 46, the developing gap regulating roller 47 abuts on the peripheral surface of the rotary drum 2, and the peripheral surface of the rotary drum 2 A predetermined developing gap DG2 is formed between the developing gap DG2 and the peripheral surface. In the illustrated embodiment, the sleeve member 31 of the first developer applying unit 30 that is immovably supported by the developing housing 10.
Since the ear-cutting plate 561 is disposed to face the peripheral surface of the developing device 10, the position of the support shaft 41 of the first developer applying unit 30, that is, the position of the developing housing 10 is adjusted in order to adjust the developing gap DG 1. Even if displaced, the first developer applying means 3
The peripheral surface of the No. 0 sleeve member 31 and the cutting board 561 are maintained in a predetermined positional relationship.
【００２６】次に、本発明の更に他の実施形態につい
て、図７および図８を参照して説明する。なお、上記図
４乃至図５に示す実施形態における同一部材には同一符
号を付して、その詳細な説明は省略する。図７および図
８に示す静電潜像現像装置８は、図４乃至図５に示す実
施形態と同様に、第１の現像剤適用手段３０の支持軸３
３の両端部は現像ハウジング１０の側壁１２に移動可能
に支持されており、第２の現像剤適用手段４０の支持軸
４３の両端部は現像ハウジング１０の側壁１２に移動不
可能に支持されている。そして、第１の現像剤適用手段
３０のスリーブ部材３１と第２の現像剤適用手段４０の
スリーブ部材４１が共に矢印で示す方向、即ち上記現像
域６において上記回転ドラム２の移動に対して順方向に
移動するように回転駆動せしめられる。この実施形態に
おいては、穂切手段５６を構成する穂切板５６１が現像
ハウジング１０に対して移動可能に装着された第１の現
像剤適用手段３０のスリーブ部材３１と対向して配設さ
れている。穂切板５６１は第１の現像剤適用手段３０を
回転ドラム２に向けて押圧する押圧機構の支持部材６３
に取り付けられている。即ち、支持部材６３には取付部
６３１が設けられており、該取付部６３１が現像ハウジ
ング１０の側壁１２に形成された穴１２ｂを挿通して現
像ハウジング１０内に突出して位置付けられる。この取
付部６３１に穂切板５６１がビス６６によって取り付け
られる。上記現像ハウジング１０の側壁１２に形成され
た穴１２ｂにはスポンジ材６７が装着されており、この
スポンジ材６７が取付部６３１の移動は許容しつつ現像
剤の流出を防止している。なお、図７および図８には、
手前側の穂切板取付け構造のみが示されているが、奥側
の穂切板取付け構造も実質的に同一の構成である。以上
のように構成された静電潜像現像装置８における現像ギ
ャップＤＧ１および現像ギャップＤＧ２の調整は上記図
４乃至図５に示す実施形態と同様である。図７および図
８に示す実施形態においては、穂切手段５６を構成する
穂切板５６１が現像ハウジング１０に対して移動可能に
装着された第１の現像剤適用手段３０のスリーブ部材３
１と対向して配設されているが、この穂切板５６１は第
１の現像剤適用手段３０の支持軸３３に装着された支持
部材６３に取り付けられているので、押圧手段６５によ
って第１の現像剤適用手段３０が現像ハウジング１０に
対して変位しても穂切板５６１も変位するため、両者の
位置関係は変化することなく維持される。Next, still another embodiment of the present invention will be described with reference to FIGS. The same members in the embodiments shown in FIGS. 4 and 5 are denoted by the same reference numerals, and detailed description thereof will be omitted. The electrostatic latent image developing device 8 shown in FIGS. 7 and 8 is similar to the embodiment shown in FIGS.
3 are both movably supported by the side wall 12 of the developing housing 10, and both ends of the support shaft 43 of the second developer applying unit 40 are movably supported by the side wall 12 of the developing housing 10. I have. Then, the sleeve member 31 of the first developer application unit 30 and the sleeve member 41 of the second developer application unit 40 both move in the direction indicated by the arrow, that is, in the development area 6 in order with respect to the movement of the rotary drum 2. It is rotationally driven to move in the direction. In this embodiment, an ear-cutting plate 561 constituting the ear-cutting means 56 is disposed so as to face the sleeve member 31 of the first developer applying means 30 movably mounted on the developing housing 10. I have. The cutting plate 561 is a supporting member 63 of a pressing mechanism that presses the first developer applying unit 30 toward the rotating drum 2.
Attached to. That is, the support member 63 is provided with a mounting portion 631, which is positioned so as to protrude into the developing housing 10 through a hole 12 b formed in the side wall 12 of the developing housing 10. The ear cutting board 561 is attached to this attachment portion 631 with screws 66. A sponge material 67 is mounted in a hole 12b formed in the side wall 12 of the developing housing 10, and the sponge material 67 allows the mounting portion 631 to move while preventing the developer from flowing out. 7 and 8 show:
Although only the front side cutting board mounting structure is shown, the rear side cutting board mounting structure has substantially the same configuration. The adjustment of the developing gap DG1 and the developing gap DG2 in the electrostatic latent image developing device 8 configured as described above is the same as in the embodiment shown in FIGS. In the embodiment shown in FIG. 7 and FIG. 8, the sleeve member 3 of the first developer applying unit 30 in which the panning plate 561 constituting the panning unit 56 is movably mounted on the developing housing 10.
The first cutting plate 561 is attached to the support member 63 mounted on the support shaft 33 of the first developer application unit 30, and thus the first cutting plate 561 is pressed by the pressing unit 65. Even if the developer applying means 30 is displaced with respect to the developing housing 10, the cutting board 561 is also displaced, so that the positional relationship between them is maintained without change.
【００２７】なお、図７および図８に示す実施形態のよ
うに、現像ハウジング１０に対して移動可能に配設した
現像剤適用手段の支持軸に穂切板を装着する構成であれ
ば、第１の現像剤適用手段および第２の現像剤適用手段
の両方が現像ハウジング１０に対して移動可能に配設し
た現像装置に適用することができ、また、１個のみの現
像剤適用手段を備えた現像装置に適用することもでき
る。In addition, as in the embodiment shown in FIGS. 7 and 8, if the structure is such that the cutting board is mounted on the support shaft of the developer applying means movably disposed with respect to the developing housing 10, Both the first developer applying unit and the second developer applying unit can be applied to a developing device movably disposed with respect to the developing housing 10, and only one developer applying unit is provided. It can also be applied to a developing device.
【００２８】[0028]
【発明の効果】本発明による画像形成機の静電潜像現像
装置は以上のように構成されているので、次の作用効果
を奏する。The electrostatic latent image developing apparatus for an image forming apparatus according to the present invention is constructed as described above, and has the following operational effects.
【００２９】即ち、本発明による画像形成機の静電潜像
現像装置においては、現像ハウジングに移動不可能に支
持された現像剤適用手段のスリーブ部材の周表面に対向
して穂切手段が配設されているので、現像ギャップを調
整するために現像ハウジングの位置が変位しても、現像
剤適用手段のスリーブ部材の周表面と穂切手段とは所定
の位置関係に維持される。That is, in the electrostatic latent image developing apparatus of the image forming apparatus according to the present invention, the ear cutting means is disposed opposite to the peripheral surface of the sleeve member of the developer applying means which is immovably supported by the developing housing. Therefore, even if the position of the developing housing is displaced to adjust the developing gap, the peripheral surface of the sleeve member of the developer applying unit and the cutting unit are maintained in a predetermined positional relationship.
【００３０】また、本発明による画像形成機の静電潜像
現像装置においては、穂切手段が現像ハウジングに対し
て移動可能に配設された現像剤適用手段の支持軸に装着
されているので、所定の現像ギャップを形成するために
押圧手段によって現像剤適用手段が現像ハウジングに対
して変位しても穂切手段も変位するため、両者の位置関
係は変化することなく維持される。Further, in the electrostatic latent image developing apparatus of the image forming machine according to the present invention, since the cutting means is mounted on the support shaft of the developer applying means movably disposed with respect to the developing housing. Even when the developer applying means is displaced with respect to the developing housing by the pressing means to form a predetermined developing gap, the cutting means is also displaced, so that the positional relationship between the two is maintained without change.
【図１】本発明に従って構成された画像形成機の静電潜
像現像装置の一実施形態を示すもので要部を破断して示
す正面図。FIG. 1 is a front view showing an embodiment of an electrostatic latent image developing device of an image forming machine constituted according to the present invention, in which main parts are cut away.
【図２】図１に示す静電潜像現像装置の現像剤適用手段
と回転ドラムとの一関係を示す説明図。FIG. 2 is an explanatory diagram showing a relationship between a developer applying unit and a rotating drum of the electrostatic latent image developing device shown in FIG.
【図３】図１に示す静電潜像現像装置の要部正面図。FIG. 3 is a front view of a main part of the electrostatic latent image developing device shown in FIG. 1;
【図４】本発明に従って構成された静電潜像現像装置の
他の実施形態を示す正面図。FIG. 4 is a front view showing another embodiment of the electrostatic latent image developing device constituted according to the present invention.
【図５】図４に示す静電潜像現像装置のＡ−Ａ線断面
図。5 is a cross-sectional view of the electrostatic latent image developing device shown in FIG. 4, taken along line AA.
【図６】本発明に従って構成された静電潜像現像装置の
更に他の実施形態を示す要部断面図。FIG. 6 is a cross-sectional view of a principal part showing still another embodiment of the electrostatic latent image developing device constituted according to the present invention.
【図７】本発明に従って構成された静電潜像現像装置の
更に他の実施形態を示す正面図。FIG. 7 is a front view showing still another embodiment of the electrostatic latent image developing device constituted according to the present invention.
【図８】図７に示す静電潜像現像装置のＢ−Ｂ線断面
図。8 is a sectional view of the electrostatic latent image developing device shown in FIG.
２：回転ドラム ６：現像域 ８：静電潜像現像装置 １０：現像ハウジング ３０：第１の現像剤適用手段 ３１：第１の現像剤適用手段のスリーブ部材 ３２：第１の現像剤適用手段の磁石手段 ３３：第１の現像剤適用手段の支持軸 ４０：第２の現像剤適用手段 ４１：第２の現像剤適用手段のスリーブ部材 ４２：第２の現像剤適用手段の磁石手段 ４３：第２の現像剤適用手段の支持軸 ４６：スプリング ４７：現像ギャップ規制コロ（現像ギャップ規制部材） ５０：現像ギャップ調整手段 ５６：穂切手段 ５８：現像剤攪拌搬送機構 ６２：軸受 ６３：支持部材 ６４：軸受 ６５：ばね押圧手段 2: rotating drum 6: developing area 8: electrostatic latent image developing device 10: developing housing 30: first developer applying means 31: sleeve member of first developer applying means 32: first developer applying means 33: support shaft of the first developer application unit 40: second developer application unit 41: sleeve member of the second developer application unit 42: magnet unit of the second developer application unit 43: Supporting shaft of second developer application unit 46: Spring 47: Development gap regulating roller (developing gap regulating member) 50: Development gap adjusting unit 56: Hot cutting unit 58: Developer stirring and conveying mechanism 62: Bearing 63: Support member 64: Bearing 65: Spring pressing means
Claims (3)
に配設され回転駆動せしめられるスリーブ部材と該スリ
ーブ部材を支持する支持軸および該スリーブ部材内に配
設された磁石手段とから構成された複数個の現像剤適用
手段を具備し、該複数個の現像剤適用手段を機体に装着
された像担持体と対向して配設した画像形成機の静電潜
像現像装置において、 該複数個の現像剤適用手段の一つは、該支持軸が該現像
ハウジングに移動不可能に支持され、該現像ハウジング
が機体に装着された状態で機体に配設された現像ギャッ
プ調整手段によって位置規制されることにより該スリー
ブ部材と該像担持体との間に所定の現像ギャップが形成
されるように構成され、 他の現像剤適用手段は、該支持軸の両端部に該像担持体
に当接して該スリーブ部材と該像担持体との間に所定の
現像ギャップを形成する現像ギャップ規制部材を備え、
該支持軸が該現像ハウジングに該像担持体に向かって移
動可能に支持されているとともに、押圧手段によって該
像担持体に向けて付勢されており、 該一つの現像剤適用手段を構成するスリーブ部材に対向
して配設され該スリーブ部材に磁気吸着される現像剤量
を規制する穂切手段を該現像ハウジングに装着した、 ことを特徴とする画像形成機の静電潜像現像装置。1. A plurality of components comprising a developing housing, a sleeve member disposed in the developing housing and driven to rotate, a support shaft supporting the sleeve member, and magnet means disposed in the sleeve member. An electrostatic latent image developing device of an image forming machine, comprising: a plurality of developer application units; wherein the plurality of developer application units are disposed so as to face an image carrier mounted on the body. One of the developer application means is such that the support shaft is immovably supported by the developing housing, and the position thereof is regulated by a developing gap adjusting means provided on the machine body with the developing housing mounted on the machine body. Thereby, a predetermined developing gap is formed between the sleeve member and the image carrier, and other developer applying means is in contact with the image carrier at both ends of the support shaft. The sleeve member A developing gap regulating member for forming a predetermined development gap between the image bearing member,
The support shaft is supported by the developing housing so as to be movable toward the image carrier, and is urged toward the image carrier by a pressing means to constitute the one developer applying means. An electrostatic latent image developing apparatus for an image forming machine, comprising: a front cutting means mounted on the developing housing, the front cutting means being disposed opposite to the sleeve member and regulating the amount of developer magnetically attracted to the sleeve member.
に配設され回転駆動せしめられるスリーブ部材と該スリ
ーブ部材を回転自在に支持する支持軸および該スリーブ
部材内に配設された磁石手段とから構成された２個の現
像剤適用手段を具備し、該２個の現像剤適用手段を機体
に装着された像担持体と対向して配設した画像形成機の
静電潜像現像装置において、 一方の現像剤適用手段は、該支持軸が該現像ハウジング
に移動不可能に支持され、該現像ハウジングが機体に装
着された状態で機体に配設された現像ギャップ調整手段
によって位置規制されることにより該スリーブ部材と該
像担持体との間に所定の現像ギャップが形成されるよう
に構成され、 他方の現像剤適用手段は、該支持軸の両端部に該像担持
体に当接して該スリーブ部材と該像担持体との間に所定
の現像ギャップを形成する現像ギャップ規制部材を備
え、該支持軸が該一方の現像剤適用手段を構成する該支
持軸に一端部が回動可能に支持され押圧手段によって該
像担持体に向けて押圧されている支持部材に支持されて
おり、 該一方の現像剤適用手段を構成するスリーブ部材に対向
して配設され該スリーブ部材に磁気吸着される現像剤量
を規制する穂切手段を該現像ハウジングに装着した、 ことを特徴とする画像形成機の静電潜像現像装置。2. A developing device comprising: a developing housing; a sleeve member disposed in the developing housing and driven to rotate; a support shaft rotatably supporting the sleeve member; and magnet means disposed in the sleeve member. An electrostatic latent image developing device of an image forming machine, comprising two developer applying means provided in the image forming apparatus, wherein the two developer applying means are disposed so as to face an image carrier mounted on the body. The developer applying means is configured such that the support shaft is immovably supported by the developing housing, and the position is regulated by developing gap adjusting means disposed on the machine body with the developing housing mounted on the machine body. A predetermined developing gap is formed between the sleeve member and the image carrier, and the other developer applying means abuts on the image carrier at both ends of the support shaft to contact the sleeve. Components A developing gap regulating member for forming a predetermined developing gap with the image carrier, wherein one end of the supporting shaft is rotatably supported by the supporting shaft constituting the one developer applying unit, and a pressing unit is provided. The amount of developer that is supported by a support member pressed toward the image carrier and that is disposed to face the sleeve member that constitutes the one developer application unit and that is magnetically attracted to the sleeve member An electrostatic latent image developing device for an image forming machine, wherein a cutting means for restricting the temperature is mounted on the developing housing.
に配設され回転駆動せしめられるスリーブ部材と該スリ
ーブ部材を支持する支持軸および該スリーブ部材内に配
設された磁石手段とから構成された現像剤適用手段を具
備し、該現像剤適用手段を機体に装着された像担持体と
対向して配設した画像形成機の静電潜像現像装置におい
て、 該現像剤適用手段は、該支持軸の両端部に該像担持体に
当接して該スリーブ部材と該像担持体との間に所定の現
像ギャップを形成する現像ギャップ規制部材を備え、該
支持軸が該現像ハウジングに該像担持体に向かって移動
可能に支持されているとともに、押圧手段によって該像
担持体に向けて付勢されており、 該現像剤適用手段を構成するスリーブ部材に対向して配
設され該スリーブ部材に磁気吸着される現像剤量を規制
する穂切手段が該支持軸に装着されている、 ことを特徴とする画像形成機の静電潜像現像装置。3. A developing device comprising a developing housing, a sleeve member disposed in the developing housing and driven to rotate, a support shaft for supporting the sleeve member, and magnet means disposed in the sleeve member. An electrostatic latent image developing device for an image forming machine, comprising: a developer application unit, wherein the developer application unit is disposed to face an image carrier mounted on the machine body. A developing gap regulating member which abuts the image carrier to form a predetermined developing gap between the sleeve member and the image carrier, and wherein the support shaft is attached to the developing housing by the image carrier. And is urged toward the image carrier by a pressing means, and is disposed to face a sleeve member constituting the developer applying means, and is magnetically attached to the sleeve member. Adsorbed That ear switching means for regulating the developer amount is mounted on the support shaft, an electrostatic latent image developing device of an image forming machine, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9154733A JPH112961A (en) | 1997-06-12 | 1997-06-12 | Electrostatic latent image developing device for image forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9154733A JPH112961A (en) | 1997-06-12 | 1997-06-12 | Electrostatic latent image developing device for image forming machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH112961A true JPH112961A (en) | 1999-01-06 |
Family
ID=15590756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9154733A Pending JPH112961A (en) | 1997-06-12 | 1997-06-12 | Electrostatic latent image developing device for image forming machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH112961A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002062731A (en) * | 2000-06-09 | 2002-02-28 | Canon Inc | Developing apparatus, process cartridge and image forming apparatus |
| JP2002341655A (en) * | 2001-05-21 | 2002-11-29 | Canon Inc | Developing device |
| US6735410B2 (en) * | 2001-05-30 | 2004-05-11 | Canon Kabushiki Kaisha | Developing device featuring a first developer bearing member and a second, swingable developer bearing member |
| US6947689B2 (en) * | 2002-10-31 | 2005-09-20 | Canon Kabushiki Kaisha | Image forming apparatus |
| US6970671B2 (en) * | 2002-10-31 | 2005-11-29 | Canon Kabushiki Kaisha | Image forming apparatus |
| JP2013080263A (en) * | 2013-02-04 | 2013-05-02 | Ricoh Co Ltd | Developing device, and image forming apparatus |
| JP2013242460A (en) * | 2012-05-22 | 2013-12-05 | Fuji Xerox Co Ltd | Developing device and image forming apparatus |
| JP2015034928A (en) * | 2013-08-09 | 2015-02-19 | キヤノン株式会社 | Developing device and process cartridge |
-
1997
- 1997-06-12 JP JP9154733A patent/JPH112961A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002062731A (en) * | 2000-06-09 | 2002-02-28 | Canon Inc | Developing apparatus, process cartridge and image forming apparatus |
| JP4620900B2 (en) * | 2000-06-09 | 2011-01-26 | キヤノン株式会社 | Development device |
| JP2002341655A (en) * | 2001-05-21 | 2002-11-29 | Canon Inc | Developing device |
| JP4756773B2 (en) * | 2001-05-21 | 2011-08-24 | キヤノン株式会社 | Development device |
| US6735410B2 (en) * | 2001-05-30 | 2004-05-11 | Canon Kabushiki Kaisha | Developing device featuring a first developer bearing member and a second, swingable developer bearing member |
| US6947689B2 (en) * | 2002-10-31 | 2005-09-20 | Canon Kabushiki Kaisha | Image forming apparatus |
| US6970671B2 (en) * | 2002-10-31 | 2005-11-29 | Canon Kabushiki Kaisha | Image forming apparatus |
| US7200351B2 (en) | 2002-10-31 | 2007-04-03 | Canon Kabushiki Kaisha | Image forming apparatus featuring a developing device which abuts and retracts from an image bearing member |
| JP2013242460A (en) * | 2012-05-22 | 2013-12-05 | Fuji Xerox Co Ltd | Developing device and image forming apparatus |
| JP2013080263A (en) * | 2013-02-04 | 2013-05-02 | Ricoh Co Ltd | Developing device, and image forming apparatus |
| JP2015034928A (en) * | 2013-08-09 | 2015-02-19 | キヤノン株式会社 | Developing device and process cartridge |
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