JPS61163357A - Developing device - Google Patents

Developing device

Info

Publication number
JPS61163357A
JPS61163357A JP404485A JP404485A JPS61163357A JP S61163357 A JPS61163357 A JP S61163357A JP 404485 A JP404485 A JP 404485A JP 404485 A JP404485 A JP 404485A JP S61163357 A JPS61163357 A JP S61163357A
Authority
JP
Japan
Prior art keywords
developer
toner
developing sleeve
belt
developing device
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
Application number
JP404485A
Other languages
Japanese (ja)
Inventor
Noriyoshi Tarumi
紀慶 樽見
Tatsufumi Kiyomiya
清宮 龍文
Hiroki Izumi
出水 広己
Makoto Kobu
真 小夫
Hidetoshi Yano
英俊 矢野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP404485A priority Critical patent/JPS61163357A/en
Publication of JPS61163357A publication Critical patent/JPS61163357A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0808Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer supplying means, e.g. structure of developer supply roller

Abstract

PURPOSE:To perform efficiently desired triboelectrification and layer thickness control even if a nonmagnetic developer is used, by providing a rotating member blocked with plural band-shaped members so that band-shaped members rub a developing sleeve. CONSTITUTION:Plural belts 4b consisting of highly elastic band-shaped members are blocked uniformly on all of the peripheral surface of a supply roll 4 arranged near a developing sleeve 1. The roll 4 is rotated in the same direction as the developing sleeve 1 to rube the surface of the sleeve with bellies of belts 4b. The roll 4 is so constituted that one belt 4b rubs always the surface of the sleeve during the rotation. Thus, a toner is constricted to a rubbing part C, and desired triboelectrification and layer thickness control are performed efficiently even if a nonmagnetic developer is used.

Description

【発明の詳細な説明】 韮亙立夏 本発明は、乾式現像装置に関し、より詳細には、非磁性
の二成分系現像剤を用いる現像方式に好適な現像装置に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dry developing device, and more particularly to a developing device suitable for a developing method using a non-magnetic two-component developer.

灸未扱4 従来、′電子写真や静電記録等に採用される乾式現像方
法には、トナーとキャリヤとを含む二成分系現像剤を用
いる方法と、キャリヤを含まなし1−成分系現像剤を用
いる方法が有る。前者の方法は。
Moxibustion not covered 4 Conventionally, the dry developing methods used for electrophotography and electrostatic recording include two-component developers containing toner and carrier, and one-component developers that do not contain carrier. There is a method using . The former method is.

比較的安定して良好な画像が得られるが、その反面、キ
ャリヤの劣化及びトナーとキャリヤとの混合比の変動等
が発生し易く、装置の維持管理性やコンパクト化に難点
がある。
Although relatively stable and good images can be obtained, on the other hand, carrier deterioration and fluctuations in the mixture ratio of toner and carrier tend to occur, making it difficult to maintain and manage the device and make it more compact.

そこで、上述の如き欠点を有しない一成分系現像剤が注
目される。−成分系現像剤は1通常、トナー中にキャリ
ヤに相当する物質を含有させてあり、磁力を利用してト
ナーを移動させる場合は、トナーに磁性体を含有させる
。ところが、磁性体は不透明であるから、カラー現像に
おいてはその色素の影響を受は鮮明なカラー画像を得る
ことが難しい、従って、特にカラー現像に対しては、磁
性体を含まない非磁性現像剤を用いる方法が適している
が、この場合、現像剤を如何にして円滑に所定の経路に
沿って移動させるかが1問題となる。
Therefore, one-component developers that do not have the above-mentioned drawbacks are attracting attention. - Component type developer 1 Usually contains a substance corresponding to a carrier in the toner, and when moving the toner using magnetic force, the toner contains a magnetic substance. However, since magnetic materials are opaque, it is difficult to obtain clear color images due to the influence of the dye in color development.Therefore, especially for color development, non-magnetic developers that do not contain magnetic materials are used. However, in this case, one problem is how to move the developer smoothly along a predetermined path.

■−煎 本発明は、以上の点に鑑みなされたものであって、非磁
性現像剤を使用する場合も所望の電荷が充分に付与され
た層厚の均一な現像剤の薄層を形成でき高度な画像品質
を安定して得ることができる現像装置を提供することを
目的とする。
■-Description The present invention has been made in view of the above points, and even when using a non-magnetic developer, it is possible to form a thin layer of developer with a uniform layer thickness and sufficiently imparted with the desired charge. An object of the present invention is to provide a developing device that can stably obtain high image quality.

隻−腹 本発明は、上記の目的を達成させるため、潜像担持体に
現像剤を薄層化して供給し潜像を可視像化する現像装置
において、現像剤を現像領域を含む所定の経路に沿って
搬送する現像剤搬送体と。
In order to achieve the above object, the present invention provides a developing device that supplies a thin layer of developer to a latent image carrier and visualizes a latent image. and a developer transport body that transports the developer along the path.

現像剤を貯留する貯留手段と、回転軸の周囲に弾性材料
から成る複数の帯状部材が均等に植設されて形成されて
おり該帯状部材を前記現像剤搬送体表面に摺擦させて前
記貯留手段の現像剤を前記現像剤搬送体に適量づつ供給
する現像剤供給手段と。
A storage means for storing the developer, and a plurality of belt-like members made of an elastic material are evenly planted around a rotating shaft, and the belt-like members are rubbed against the surface of the developer transporter to store the developer. a developer supplying means for supplying an appropriate amount of the developer of the means to the developer conveying body;

前記現像剤供給手段の現像剤の搬送方向に対して下流側
に配設されており一部を前記現像剤搬送体表面に圧接さ
せ搬送されてくる現像剤の層厚を規制する層厚規制部材
とを有することを特徴としたものである。
a layer thickness regulating member disposed on the downstream side of the developer supplying means with respect to the developer conveying direction, and regulating a layer thickness of the developer being conveyed by bringing a part into pressure contact with the surface of the developer conveying body; It is characterized by having the following.

以下、本発明の実施例に基づいて具体的に説明する。第
1図は本発明の1実施例としての非磁性−成分系現像剤
を使用する現像装置を示した模式的断面図である。第1
図において、現像剤搬送体としての現像スリーブ1が回
転自在に支承されており1本例では、矢印A方向に所定
速度で回転駆動される。現像スリーブ1は、第2図に示
す如く、スリーブ状の例えばアルミニウム等の導電性基
体1a周面上にクロロプレン等の絶縁材料から成る絶縁
層1bを被着し、更にその上に多数の電極粒子1c工を
互いに電気的絶縁状態に分散させて成る電極層1cが積
層され、構成されている。この場合、例えばエポキシ樹
脂等の絶縁材料にカーボンブラック等の導電性材料を均
一に分散混合し、この混合材料を絶縁層lb上に塗布す
ることにより、多数の微小電極が均一に分散する電極層
1Gを容易に形成することができる。微小電極の材料と
しては、銅等の金属粉も使用できる。又、これらを互い
に電気的に絶縁状態に分散させる分散媒体材料としては
、アクリル系、ウレタン系、スチレン系、アクリル−ウ
レタン系、エポキシ−シリコン又はエポキシ−テフロン
系等の幅広い材料を使用できるが、現像剤としてのトナ
ーが効率良く摩擦帯電される様に使用するトナーに対す
る摩擦帯電系列が離れていることが要求される。
Hereinafter, the present invention will be specifically explained based on examples. FIG. 1 is a schematic sectional view showing a developing device using a non-magnetic component developer as an embodiment of the present invention. 1st
In the figure, a developing sleeve 1 serving as a developer conveying member is rotatably supported, and in one example, it is rotationally driven in the direction of arrow A at a predetermined speed. As shown in FIG. 2, the developing sleeve 1 has an insulating layer 1b made of an insulating material such as chloroprene coated on the circumferential surface of a sleeve-shaped conductive substrate 1a made of aluminum or the like, and a large number of electrode particles on the insulating layer 1b. The electrode layer 1c is formed by stacking electrode layers 1c in which 1c electrodes are electrically insulated from each other. In this case, for example, by uniformly dispersing and mixing a conductive material such as carbon black into an insulating material such as an epoxy resin, and coating this mixed material on the insulating layer lb, an electrode layer in which a large number of microelectrodes are uniformly dispersed. 1G can be easily formed. Metal powders such as copper can also be used as the material for the microelectrodes. Further, as the dispersion medium material for dispersing these in an electrically insulating state from each other, a wide range of materials can be used, such as acrylic, urethane, styrene, acrylic-urethane, epoxy-silicon, or epoxy-Teflon. In order to efficiently triboelectrically charge the toner as a developer, it is required that the triboelectrification series for the toner used be separated.

以上の如く、現像スリーブ1の表面層として微小電極を
分散させた電極層1cを形成することにより、−成分系
トナーを使用する場合も線画像で画像濃度が選択的に上
昇するエツジ効果による好適な現像特性を得ることがで
きる。又、微小電極としてのカーボンブラック等の低抵
抗物質を分散せしめたエポキシ樹脂等の絶縁材料は、金
属等に比べてトナーとの付着性が良いから、非磁性−成
分系トナーの様に特別な磁力等の担持力が関与しない現
像剤をもその充分な量を担持し搬送することができる。
As described above, by forming the electrode layer 1c in which microelectrodes are dispersed as the surface layer of the developing sleeve 1, even when using a -component toner, the image density is selectively increased in a line image, which is advantageous due to the edge effect. It is possible to obtain excellent development characteristics. In addition, insulating materials such as epoxy resin in which low-resistance substances such as carbon black are dispersed as microelectrodes have better adhesion with toner than metals, so they can be used as special materials such as non-magnetic component toners. It is also possible to support and transport a sufficient amount of developer that does not involve a supporting force such as magnetic force.

尚、導電性基体1aは、後述する除電ブラシ10と同電
位でバイアス電源11に接続されている。又、絶縁層1
bは、現像に適した電界強度を保持する為に設けてあり
、必要に応じて省略することも可能である。
Note that the conductive substrate 1a is connected to a bias power source 11 at the same potential as a static elimination brush 10, which will be described later. Also, insulating layer 1
b is provided to maintain an electric field strength suitable for development, and can be omitted if necessary.

現像スリーブ1に対して1本例では図中右側に、現像剤
を貯留するホッパ2が形成されている0本例で使用する
現像剤は1強磁性体から成るキャリヤ等を含まない非磁
性の一成分系トナーである。
In this example, a hopper 2 for storing the developer is formed on the right side of the figure.The developer used in this example is 1.The developer used in this example is a non-magnetic material that does not contain a carrier made of ferromagnetic material. It is a one-component toner.

ホッパ2の上部には、補給口2aが形成され、ここにト
ナーが充填されたカートリッジ3が装着され、ホッパ2
に向けて新たなトナーが自然落下により補給される。
A replenishment port 2a is formed in the upper part of the hopper 2, and a cartridge 3 filled with toner is installed in the replenishment port 2a, and the hopper 2
New toner is replenished by natural fall.

而して、ホッパ2の現像スリーブ1にトナーを供給する
出口側には、トナーの現像スリーブ1表面上への移動を
推進する現像剤供給手段としての供給ローラ4が配設さ
れている。供給ローラ4は。
On the exit side of the hopper 2 that supplies toner to the developing sleeve 1, a supply roller 4 is disposed as a developer supply means for promoting the movement of toner onto the surface of the developing sleeve 1. The supply roller 4 is.

回転自在に支承されたローラ4aの全周面に複数の弾性
に富んだ帯状部材から成るベルト4bが均等に植設され
て形成されており、回転しつつ各ベルト4bが腹部を現
像スリーブ1表面に摺擦可能に設置されている。この場
合、ベルト4bの植設密度は、供給ローラ4が回転して
いる際に少なくとも1個のベルト4bが常時現像スリー
ブ1表面及びホッパ2の底部2bに摺擦可能な様に設定
されている。これにより、トナーを常に略一定の割合で
摺擦部Cに供給することができる。そして、供給ローラ
4の回転方向は、現像スリーブ1と同方向が望ましい、
即ち、摺擦部Cにおいて、双方がベルト自体の弾性によ
る適度な圧力で圧接しつつ逆方向に移動する状態が好ま
しい、これにより、トナーが摺擦部Cに挟圧され効率良
く摩擦帯電されると共に層厚が規制され、適度な層厚の
トナ一層が現像スリーブ1表面に付着形成される。又。
Belts 4b made of a plurality of highly elastic belt-like members are evenly planted on the entire circumference of a rotatably supported roller 4a, and each belt 4b extends the abdomen of the developing sleeve 1 while rotating. It is installed so that it can be rubbed. In this case, the density of the belts 4b is set such that at least one belt 4b can constantly rub against the surface of the developing sleeve 1 and the bottom 2b of the hopper 2 while the supply roller 4 is rotating. . Thereby, toner can always be supplied to the rubbing portion C at a substantially constant rate. The direction of rotation of the supply roller 4 is preferably the same as that of the developing sleeve 1.
That is, in the sliding portion C, it is preferable that both sides move in opposite directions while being pressed together with appropriate pressure due to the elasticity of the belt itself.Thereby, the toner is pinched in the sliding portion C and efficiently charged by friction. At the same time, the layer thickness is regulated, and a single layer of toner having an appropriate thickness is deposited on the surface of the developing sleeve 1. or.

ベルト4bがホッパ底部2bを摺擦してその近傍に発生
しがちなトナーの滞留を防止するから、アジテータ等の
別個の撹拌手段を設ける必要がなく、現像装置の簡素化
に寄与する。
Since the belt 4b rubs against the hopper bottom 2b and prevents toner from staying near the hopper bottom 2b, there is no need to provide a separate stirring means such as an agitator, contributing to the simplification of the developing device.

ところで、供給ローラ4の好適な回転速度は。By the way, what is the preferred rotational speed of the supply roller 4?

現像スリーブ1の周速度によって異なるが、総じて現像
スリーブ1より高速度に設定するのが好ましい。然るに
、供給ローラ4を高速度で回転させると、風を発生させ
、トナー飛散や軸受部へのトナー固着等の副作用を伴う
、そこで、本例では、第3図に示す如く、供給ローラ4
の各ベルト4bにローラ4aの軸方向に沿って多数の矩
形を成す開口4Cを穿設しである。これにより、トナー
の供給効果を低下させることなく風の発生を大幅に抑制
することができる。尚、開口4Cは矩形に限らず、第4
図に示す如く多数の円形開口4’cを穿設してもよい。
Although it varies depending on the circumferential speed of the developing sleeve 1, it is generally preferable to set the speed higher than that of the developing sleeve 1. However, when the supply roller 4 is rotated at a high speed, wind is generated, which causes side effects such as toner scattering and toner sticking to the bearing. Therefore, in this example, the supply roller 4 is rotated as shown in FIG.
Each belt 4b is provided with a large number of rectangular openings 4C along the axial direction of the roller 4a. Thereby, the generation of wind can be significantly suppressed without reducing the toner supply effect. Note that the opening 4C is not limited to a rectangular shape.
As shown in the figure, a large number of circular openings 4'c may be provided.

本例のベルト4bは、弾性材料の内でも、トナーとの非
粘着性に優れた含フツ素樹脂で形成されている。従って
、ベルト4bにトナー固着が発生せず、常時安定したト
ナー供給効果が発揮される。
The belt 4b of this example is made of a fluorine-containing resin, which is among elastic materials and has excellent non-adhesion with toner. Therefore, toner does not stick to the belt 4b, and a stable toner supply effect is always exhibited.

又、含フツ素樹脂はトナーを正極性に帯電させる摩擦帯
電系列に属する。従って、後述するが、本例の如く負極
性の静電潜像を形成する有機性感光体ベルトを潜像担持
体として使用する現像装置においては、トナーを効率良
く所望の荷電状態に摩擦帯電でき、極めて好都合である
。尚、トナーとの非粘着性に優れた含フツ素樹脂として
は、ポリテトラフルオロエチレン(PTFE)、テトラ
フルオロエチレン−パーフルオロアルキルビニルエーテ
ル共重合体(PFA)、テトラフルオロエチレン−ヘキ
サフルオロプロピレン共重合体(FEP)、テトラフル
オロエチレン−エチレン共重合体(ETFE)、ポリク
ロロトリプルオロエチレン(CTFE)等がある。
Further, the fluorine-containing resin belongs to the triboelectrification series that positively charges the toner. Therefore, as will be described later, in a developing device that uses an organic photoreceptor belt that forms a negative electrostatic latent image as a latent image carrier as in this example, it is possible to efficiently triboelectrically charge the toner to a desired charging state. , which is extremely convenient. Note that examples of fluorine-containing resins that have excellent non-adhesive properties with toner include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), and tetrafluoroethylene-hexafluoropropylene copolymer. Examples include polymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), and polychlorotrioleoethylene (CTFE).

以上の如く、現像剤供給手段としてブラシ状の供給ロー
ラ4を配設することにより、本例の如く現像スリーブ1
と同方向に回転させその回転に抵抗する状態で摺擦され
る場合も1両者間の摩擦抵抗が小さく現像スリーブ1の
回転トルクが低減され、現像装置の省力化に寄与する。
As described above, by disposing the brush-like supply roller 4 as a developer supply means, the developing sleeve 1
Even when the developing sleeve 1 is rotated in the same direction as the developing sleeve 1 and rubbed while resisting the rotation, the frictional resistance between the two is small and the rotational torque of the developing sleeve 1 is reduced, contributing to labor saving of the developing device.

尚、供給ローラ4のベルト4bは、必ずしも上述した如
く密に植設する必要はなく、第5図に示す如く4枚のベ
ルト4’bを均等に植設するだけでも、回転速度等の諸
条件を最適化したり他の例えばアジテータ5等のトナー
供給に関与する部材を設けることにより、所望のトナー
供給効果を得ることができる。
Note that the belts 4b of the supply roller 4 do not necessarily have to be densely planted as described above, and even if the four belts 4'b are evenly planted as shown in FIG. By optimizing the conditions or providing other members involved in toner supply, such as the agitator 5, a desired toner supply effect can be obtained.

現像スリーブ1の回転方向に沿って、供給ローラ4の下
流側には、現像スリーブ1表面に付着形成されその回転
と共に搬送されてくるトナ一層の層厚を規制して薄層化
するドクタブレード6が配設されている0本例のドクタ
ブレード6は、弾性部材から成る本体6aの一方の側面
に、例えばテトラフルオロエチレン−パーフルオロアル
キルビニルエーテル共重合体(PFA)等の前述した供
給ローラ4のベルト4bを形成した含フツ素材料から成
る絶縁膜6bを被着して形成されており、この絶縁膜6
bを介してその先端部を現像スリー11表面に圧接させ
トナーの層厚を規制する。この場合、ドクタブレード6
の先端エツジ部6cを現像スリーブ1表面に当接させる
ことにより、トナーの層厚を現像スリーブ1の幅方向に
おける所要範囲の略全域にわたり均一に規制することが
でき1層厚の均一なトナー薄層を安定的に形成すること
が可能となる。又、絶縁膜6bはトナーの固着防止と帯
電特性の向上を図る為に設けられており、本例の如くフ
ッ素系材料を使用することにより、より効果的にトナー
の固着が防止され所望の摩擦帯電が実施される。
Along the rotation direction of the developing sleeve 1, on the downstream side of the supply roller 4, there is a doctor blade 6 that regulates and thins the layer thickness of the toner layer that is formed on the surface of the developing sleeve 1 and is conveyed as the sleeve rotates. The doctor blade 6 of this example is provided with a supply roller 4 made of, for example, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), on one side of a main body 6a made of an elastic member. It is formed by adhering an insulating film 6b made of the same material as the belt 4b, and this insulating film 6
The tip thereof is brought into pressure contact with the surface of the developing sleeve 11 via the toner b to regulate the toner layer thickness. In this case, the doctor blade 6
By bringing the leading edge portion 6c into contact with the surface of the developing sleeve 1, the toner layer thickness can be uniformly regulated over substantially the entire required range in the width direction of the developing sleeve 1, and a uniform toner layer thickness of one layer can be produced. It becomes possible to form layers stably. Further, the insulating film 6b is provided to prevent toner from sticking and improve charging characteristics. By using a fluorine-based material as in this example, toner sticking can be more effectively prevented and the desired friction can be achieved. Charging is performed.

尚、ドクタブレード6に絶縁膜6bを被着させないでド
グタブレード6全体をPFAで形成しても良い、又、そ
の絶縁膜6b若しくは層厚規制部材の材料としては、P
FAの他、ポリテトラフルオロエチレン(TFE)、テ
トラフルオロエチレン−ヘキサフルオロプロピレン共重
合体(FEP)、テトラフルオロエチレン−エチレン共
重合体(ETFE)、ポリクロロトリフルオロエチレン
(CTFE)等の含フツ素樹脂や、ポリエチレン。
Note that the entire dog blade 6 may be formed of PFA without coating the insulating film 6b on the doctor blade 6, and the material of the insulating film 6b or the layer thickness regulating member may be PFA.
In addition to FA, soft-containing materials such as polytetrafluoroethylene (TFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), polychlorotrifluoroethylene (CTFE), etc. Base resin or polyethylene.

ポリプロピレン、シリコン樹脂等トナーに対して非粘着
性(離型性)の高い材料が好適である。又。
Materials with high non-adhesion (mold releasability) to toner, such as polypropylene and silicone resin, are suitable. or.

これらの材料に耐摩耗性を改善する為、カーボンブラッ
ク、カーボン繊維、ガラス繊維、シリカ微粉末、SiC
微粉末等の添加剤を含有させてもより膚。
To improve the wear resistance of these materials, carbon black, carbon fiber, glass fiber, fine silica powder, SiC
Even if it contains additives such as fine powder, it will make your skin even better.

現像スリーブ1の回転移動経路におけるドクタブレード
6の下流側の適所には、回動自在に張設された潜像担持
体としての無端状の有機感光体ベルト(opcベルト)
7の一部と現像スリーブ1表面が転勤接触し、現像領域
りが形成されている。
At a suitable position on the downstream side of the doctor blade 6 in the rotational movement path of the developing sleeve 1, an endless organic photoreceptor belt (OPC belt) is rotatably stretched and serves as a latent image carrier.
A part of the developing sleeve 7 and the surface of the developing sleeve 1 come into contact with each other to form a developing area.

適所で一様帯電及び像露光の工程を経てOPCベルト7
の表面に形成された負極性の静電潜像は、その回動と共
に現像領域りまで搬送される。現像領域りには、ドクタ
ブレード6により層厚が規制されると共に正極性の電荷
が充分に摩擦帯電されたトナー薄層が現像スリーブ1の
表面に担持され搬送されてくる8この場合、現像スリー
ブ1の表面部の電極層1cは、前述した如くトナーが付
着し易いエポキシ樹脂等の絶縁材料で形成されているか
ら、非磁性−成分系トナー等の特別な担持力が設定され
ていない現像剤をも全周面に万遍無く担持し搬送するこ
とができる。従って、opcベルト7に形成された負極
性の静電潜像に充分な正極性の電荷を有すると共に層厚
が均一なトナー薄層が安定して供給され、均一に潜像が
可視像化される。
The OPC belt 7 undergoes uniform charging and image exposure processes at a suitable location.
The electrostatic latent image of negative polarity formed on the surface of the image forming apparatus is conveyed to the developing area along with its rotation. In the developing area, a thin layer of toner whose layer thickness is regulated by a doctor blade 6 and which is sufficiently triboelectrically charged with a positive polarity is carried on the surface of the developing sleeve 1 and conveyed.8 In this case, the developing sleeve As described above, the electrode layer 1c on the surface of the electrode layer 1c is made of an insulating material such as an epoxy resin to which toner easily adheres, so it cannot be used with a developer to which a special supporting force is not set, such as a non-magnetic component toner. It is possible to carry and convey evenly on the entire circumference. Therefore, a thin toner layer having sufficient positive polarity charge and a uniform layer thickness is stably supplied to the negative electrostatic latent image formed on the OPC belt 7, and the latent image is uniformly visualized. be done.

現像領域りの現像スリーブ1の回転方向に沿った下流側
には、現像スリーブ1表面に蓄積された不要な電荷を除
去する除電ブラシ8が配設されている。現像スリーブ1
表面には、供給ローラ4やドクタブレード6及びoPC
ベルト7等との摩擦により、現像に不要な極性に帯電さ
れた電荷が蓄積される傾向がある。この不要な電荷は、
地肌汚れやスジ等の画像不良を発生させる原因となるの
で、確実に除去することが要求される。特に、現像スリ
ーブ1の電極層1cの材料であるエポキシ樹脂等の絶縁
材料に蓄積された電荷は、金属等の場合に比べて除去が
困難であり、効率の良い除電手段が要求される0本例に
おいては、導電性ブラシ毛8aの先端腹部がそれ自体の
弾性による適度な圧力で現像スリーブ1表面に当接でき
る様に。
On the downstream side of the developing sleeve 1 in the rotational direction of the developing area, a static eliminating brush 8 is disposed to remove unnecessary charges accumulated on the surface of the developing sleeve 1. Developing sleeve 1
On the surface, there are a supply roller 4, a doctor blade 6 and an oPC.
Due to friction with the belt 7 and the like, charges with a polarity unnecessary for development tend to accumulate. This unnecessary charge is
Since it causes image defects such as background stains and streaks, it is required to remove it reliably. In particular, the electric charge accumulated in the insulating material such as epoxy resin, which is the material of the electrode layer 1c of the developing sleeve 1, is more difficult to remove than in the case of metal, and an efficient charge removal method is required. In the example, the tip abdomen of the conductive brush bristles 8a can be brought into contact with the surface of the developing sleeve 1 with appropriate pressure due to its own elasticity.

その長さや材質及び除電ブラシ8の取付位置が設定され
ている。これにより、ブラシ毛8aが現像スリーブ1表
面の幅方向の所要領域にわたり均一に当接でき、除電ム
ラの無い良好な除電効果を得ることができる。そして、
除電ブラシ8は、前述した現像スリーブ1の導電性基体
1aと同一電位でバイアス電源9に接続されている。こ
れにより。
The length, material, and mounting position of the static elimination brush 8 are set. Thereby, the brush bristles 8a can uniformly contact the surface of the developing sleeve 1 over a required area in the width direction, and a good static elimination effect without uneven static elimination can be obtained. and,
The static eliminating brush 8 is connected to a bias power source 9 at the same potential as the conductive base 1a of the developing sleeve 1 described above. Due to this.

現像スリーブ1表面の不要な蓄積電荷が選択的に効率良
く除去される。かくして、除電処理を受は静電気的付着
力が弱められた残存トナーは、現像スリーブエの回転と
共に供給ローラ4の配設位置に搬送され、ここで現像ス
リーブ1表面から脱離せしめられ、新たな現像プロセス
に供される。
Unnecessary accumulated charges on the surface of the developing sleeve 1 are selectively and efficiently removed. In this way, the residual toner whose electrostatic adhesion force has been weakened after the static electricity removal process is conveyed to the position where the supply roller 4 is disposed as the developing sleeve 1 rotates, where it is detached from the surface of the developing sleeve 1 and used for new development. submitted to the process.

尚、上記実施例においては、現像剤として非磁性−成分
系トナーを使用しているが、これに限らず磁性トナーや
磁性キャリヤを用いる現像装置に対しても本発明を適用
することができる。この場合、現像剤を移動させる推進
力として磁力が設定されているから、供給ローラ4を省
略することも可能である。又、感光体ドラム等の剛性を
有するドラム式潜像担持体に対しても本発明は適用可能
である。更に、ドクタブレード6の本体6aを弾性磁性
体で形成し現像スリーブ1内部に配設した磁石の磁力に
より、ドクタブレード6を絶縁膜6bを介して現像スリ
ーブ1表面に適度に圧接させる構成としてもよい。
In the above embodiments, a non-magnetic component toner is used as the developer, but the present invention is not limited to this and can be applied to a developing device using magnetic toner or magnetic carrier. In this case, since magnetic force is set as the driving force for moving the developer, it is also possible to omit the supply roller 4. Further, the present invention is also applicable to a rigid drum-type latent image carrier such as a photosensitive drum. Furthermore, the main body 6a of the doctor blade 6 may be made of an elastic magnetic material, and the doctor blade 6 may be appropriately pressed against the surface of the developing sleeve 1 through the insulating film 6b by the magnetic force of a magnet disposed inside the developing sleeve 1. good.

羞−米 以上、詳述した如く1本発明によれば、貯留された現像
剤を現像剤搬送体上に供給する現像剤供給手段として弾
性帯状部材を周囲に植設した回転部材を現像剤搬送体と
摺擦可能に設けることにより、現像剤搬送体の駆動負荷
を過度に上昇させることなく円滑に現像剤をその表面に
供給することができる。従って、非磁性−成分系トナー
等の移動させる為の推進力が特別に設定されていない現
像剤をも円滑に所定経路に沿って移動させ、効率良く所
望の摩擦帯電と層厚規制を実施することができ、高度な
画像品質を安定して得ることが可能となる。又、帯状部
材を常時少なくとも1個が現像剤搬送体と摺擦できる様
に密に植設することにより、より均一な現像剤供給効果
を得ることができる。更に、帯状部材に開口を穿設する
ことにより、その回転に伴う風の発生を抑制でき、現像
剤の器外への濡出や吹き出しを防止することができる。
As described in detail above, according to the present invention, as a developer supplying means for supplying the stored developer onto the developer conveyance member, a rotating member having an elastic band-like member implanted around the developer conveyance member is used. By providing it so as to be able to rub against the surface of the developer conveying body, the developer can be smoothly supplied to the surface of the developer conveying body without excessively increasing the driving load of the developer conveying body. Therefore, even the developer for which the propulsion force for moving the non-magnetic component toner is not specially set can be smoothly moved along a predetermined path, and the desired frictional charging and layer thickness regulation can be efficiently carried out. This makes it possible to stably obtain high image quality. Further, by planting the belt-shaped members closely so that at least one of them can always rub against the developer conveying member, a more uniform developer supply effect can be obtained. Furthermore, by providing an opening in the belt-like member, it is possible to suppress the generation of wind due to the rotation of the belt-like member, and it is possible to prevent the developer from wetting or blowing out of the container.

尚、本発明は上記の特定の実施例に限定されるものでは
なく1本発明の技術的範囲内において種々の変形が可能
であることは勿論である。
It should be noted that the present invention is not limited to the specific embodiments described above, and it goes without saying that various modifications can be made within the technical scope of the present invention.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の1実施例を示した模式図、第2図は本
発明の1実施例における一部を示した説明図、第3図及
び第4図は夫々本発明の1実施例のベルト4bとその変
形例を示した各説明図、第5図は本発明の他の実施例を
示した説明図である。 (符号の説明) 1: 現像スリーブ 2: ホッパ 4: 供給ローラ 4b: ベルト 4 c t 4 ” ”  開口 6: ドクタブレード 特許出願人    株式会社 1ノ コ −代理人  
 小 橋 正 明(] 第1図 1°゛ 第2図 第3図      第4図 第5図
FIG. 1 is a schematic diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram showing a part of one embodiment of the present invention, and FIGS. 3 and 4 are each an embodiment of the present invention. FIG. 5 is an explanatory diagram showing another embodiment of the present invention. (Explanation of symbols) 1: Developing sleeve 2: Hopper 4: Supply roller 4b: Belt 4 ct 4 ” ” Opening 6: Doctor Blade Patent Applicant Ichinoko Co., Ltd. - Agent
Masaaki Kobashi () Figure 1 1° Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】 1、潜像担持体に現像剤を薄層化して供給し潜像を可視
像化する現像装置において、現像剤を現像領域を含む所
定の経路に沿って搬送する現像剤搬送体と、現像剤を貯
留する貯留手段と、回転軸の周囲に弾性材料から成る複
数の帯状部材が均等に植設されて形成されており該帯状
部材を前記現像剤搬送体表面に摺擦させて前記貯留手段
の現像剤を前記現像剤搬送体に適量づつ供給する現像剤
供給手段と、前記現像剤供給手段の現像剤の搬送方向に
対して下流側に配設されており一部を前記現像剤搬送体
表面に圧接させ搬送されてくる現像剤の層厚を規制する
層厚規制部材とを有することを特徴とする現像装置。 2、上記第1項において、前記現像剤供給手段は前記帯
状部材が常時少なくとも1個は前記現像剤搬送体表面に
摺擦可能な密度で植設されていることを特徴とする現像
装置。 3、上記第1項又は第2項において、前記帯状部材に多
数の開口を穿設してあることを特徴とする現像装置。 4、上記第1項乃至第3項において、前記帯状部材が前
記貯留手段の底部を摺擦可能に設けられていることを特
徴とする現像装置。
[Scope of Claims] 1. In a developing device that supplies a thin layer of developer to a latent image carrier and visualizes a latent image, a developer that transports the developer along a predetermined path including a development area. A developer transport body, a storage means for storing developer, and a plurality of belt-like members made of an elastic material are evenly planted around a rotating shaft, and the belt-like members are slid on the surface of the developer transport body. a developer supply means for supplying an appropriate amount of the developer in the storage means to the developer transport body by rubbing; A developing device comprising: a layer thickness regulating member that is brought into pressure contact with the surface of the developer conveying body to regulate the layer thickness of the developer being conveyed. 2. The developing device according to item 1 above, wherein the developer supplying means is such that at least one of the belt-like members is always planted at a density that allows it to rub against the surface of the developer transporting member. 3. The developing device according to item 1 or 2 above, characterized in that the strip member is provided with a large number of openings. 4. The developing device according to any one of the above items 1 to 3, wherein the strip member is provided so as to be able to rub against the bottom of the storage means.
JP404485A 1985-01-16 1985-01-16 Developing device Pending JPS61163357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP404485A JPS61163357A (en) 1985-01-16 1985-01-16 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP404485A JPS61163357A (en) 1985-01-16 1985-01-16 Developing device

Publications (1)

Publication Number Publication Date
JPS61163357A true JPS61163357A (en) 1986-07-24

Family

ID=11573927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP404485A Pending JPS61163357A (en) 1985-01-16 1985-01-16 Developing device

Country Status (1)

Country Link
JP (1) JPS61163357A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270104A2 (en) * 1986-12-02 1988-06-08 Matsushita Electric Industrial Co., Ltd. Developing device
JPS63217374A (en) * 1987-03-06 1988-09-09 Fuji Xerox Co Ltd One-component developing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270104A2 (en) * 1986-12-02 1988-06-08 Matsushita Electric Industrial Co., Ltd. Developing device
EP0270104A3 (en) * 1986-12-02 1990-03-14 Matsushita Electric Industrial Co., Ltd. Developing device
JPS63217374A (en) * 1987-03-06 1988-09-09 Fuji Xerox Co Ltd One-component developing device

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