JP2536108Y2 - Developing device - Google Patents

Developing device

Info

Publication number
JP2536108Y2
JP2536108Y2 JP1989121818U JP12181889U JP2536108Y2 JP 2536108 Y2 JP2536108 Y2 JP 2536108Y2 JP 1989121818 U JP1989121818 U JP 1989121818U JP 12181889 U JP12181889 U JP 12181889U JP 2536108 Y2 JP2536108 Y2 JP 2536108Y2
Authority
JP
Japan
Prior art keywords
developer
roller
regulating roller
developing device
collecting
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.)
Expired - Lifetime
Application number
JP1989121818U
Other languages
Japanese (ja)
Other versions
JPH0360355U (en
Inventor
滋 渡邊
淳 篠崎
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 JP1989121818U priority Critical patent/JP2536108Y2/en
Publication of JPH0360355U publication Critical patent/JPH0360355U/ja
Application granted granted Critical
Publication of JP2536108Y2 publication Critical patent/JP2536108Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は現像装置に関し、さらに詳しくは、一成分系
非磁性現像剤を用いる現像装置の現像剤回収構造に関す
る。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a developing device, and more particularly, to a developer recovery structure of a developing device using a one-component non-magnetic developer.

(従来の技術) 複写機あるいはプリンタ等のように、感光体上に形成
された静電潜像をトナーを主成分とする現像剤により可
視像処理する構造としては、第2図に示すように、非磁
性の現像剤担持ローラを用いた現像装置がある。
(Prior Art) As shown in FIG. 2, a structure for processing an electrostatic latent image formed on a photoreceptor with a developer containing toner as a main component, such as a copying machine or a printer, is shown in FIG. There is a developing device using a non-magnetic developer carrying roller.

第2図に示した現像装置は、感光体Aの外周部近傍に
配置された現像ローラBと、この現像ローラBに近接し
て図示しない現像剤補給タンク内からの一成分系非磁性
現像剤を現像ローラBの回転方向(図示矢印方向)にお
ける現像剤補給ローラCの下流側で現像ローラAの周面
に当接し、現像ローラ上での現像剤の厚さを規制して均
一な状態を設定する薄層化規制ローラDの周面における
現像ローラAを通過した周面に当接して同規制ローラ上
の現像剤を除去する現像剤削ぎ落し部材Fと、現像ロー
ラBにおける感光体Aを通過した後の周面に当接して現
像ローラBの周面から残留現像剤を除去するクリーニン
グ部材Gとで構成されている。
The developing device shown in FIG. 2 includes a developing roller B disposed in the vicinity of an outer peripheral portion of a photosensitive member A, and a one-component non-magnetic developer from a developer supply tank (not shown) proximate to the developing roller B. Abuts on the peripheral surface of the developing roller A on the downstream side of the developer replenishing roller C in the rotation direction of the developing roller B (in the direction of the arrow in the figure) to regulate the thickness of the developer on the developing roller to maintain a uniform state. A developer scraping member F that comes into contact with the peripheral surface of the set thinning regulating roller D that has passed through the developing roller A to remove the developer on the regulating roller, and a photosensitive member A of the developing roller B And a cleaning member G that contacts the peripheral surface after passing through to remove residual developer from the peripheral surface of the developing roller B.

このような構成の現像装置においては、現像剤補給ロ
ーラCに対して電荷注入された一成分系非磁性現像剤が
担持されて現像ローラBに供給され、現像ローラB上で
は、薄層化規制ローラDにより層厚を均一化されて感光
体A上に形成されている静電潜像の電気的吸引力により
現像剤を潜像部に吸着させるようになっている。
In the developing device having such a configuration, the one-component non-magnetic developer charged into the developer replenishing roller C is carried and supplied to the developing roller B. The layer thickness is made uniform by the roller D, and the developer is attracted to the latent image portion by the electric attraction force of the electrostatic latent image formed on the photoreceptor A.

この現像装置における構造においては、現像ローラ上
での現像剤の厚さを一定化する薄層化規制ローラが回転
することから、次のような問題を生じていた。
In the structure of this developing device, the following problem arises because the thinning regulating roller for keeping the thickness of the developer on the developing roller constant rotates.

規制ローラが現像ローラと当接しながら回転するため
に、現像ローラから除去された現像剤が規制ローラの遠
心力により飛散して規制ローラの周囲に浮遊したり、あ
るいは誤操作や衝撃によって現像ローラ上から現像剤が
脱落して規制ローラの周囲に飛散することがあり、この
ような現像剤は、自ら保有する静電気力により再度、規
制ローラに付着して層厚設定のための基準状態とされて
いる規制部材の周面状態を変化させてしまうことにな
る。
Because the regulating roller rotates while abutting on the developing roller, the developer removed from the developing roller scatters due to the centrifugal force of the regulating roller and floats around the regulating roller. The developer may fall off and scatter around the regulating roller, and such a developer adheres to the regulating roller again due to its own electrostatic force and is in a reference state for setting the layer thickness. This will change the state of the peripheral surface of the regulating member.

従って、規制ローラに付着した現像剤は、現像ローラ
上で設定されている現像剤の一定厚さを変化させてしま
い、感光体上での現像剤の供給態位をも変化させて、画
像の地肌汚れや異常画像の形成などの原因となる。
Therefore, the developer adhering to the regulating roller changes the fixed thickness of the developer set on the developing roller, and also changes the supply state of the developer on the photoreceptor, thereby changing the image. This may cause background contamination and formation of an abnormal image.

そこで、従来では、規制ローラの近傍に、同規制ロー
ラからこぼれ落ちた現像剤を回収するための受け部を設
けることが提案されている(例えば、実開昭61−16553
号公報、特開昭62−146154号公報)。
Therefore, conventionally, it has been proposed to provide a receiving portion for collecting the developer spilled from the regulating roller in the vicinity of the regulating roller (for example, Japanese Utility Model Laid-Open No. 61-65553).
JP-A-62-146154).

(考案が解決しようとする問題点) しかしながら、現像剤の上述の回収構造は、単に、現
像装置内での現像剤の回収に止まり、回収された現像剤
がその回収部に堆積していった場合にその回収部を外部
に取り出すことができず、結果としてこの回収部から溢
れた現像剤が浮遊して前述した規制部材に対する悪影響
を及ぼすことがある。
(Problems to be Solved by the Invention) However, the above-described collecting structure of the developer merely stops collecting the developer in the developing device, and the collected developer accumulates in the collecting portion. In such a case, the collecting portion cannot be taken out to the outside, and as a result, the developer overflowing from the collecting portion may float and adversely affect the above-described regulating member.

また、仮りに、上記回収部を現像装置の外部に取り出
すことができるようになっている場合、その回収部の脱
着時に回収部が傾いたりすると回収した現像剤流出して
しまう虞れがあり、結果として、こぼれ落ちた現像剤が
前述の場合と同様に規制ローラの近傍に浮遊して同部材
に悪影響を及ぼすことになるので、その取り扱いには十
分な注意が必要となる欠点があった。
Further, if the collecting section can be taken out of the developing device, if the collecting section is inclined when the collecting section is attached or detached, the collected developer may flow out. As a result, the spilled developer floats in the vicinity of the regulating roller and adversely affects the same member as in the case described above, so that there is a drawback that sufficient care must be taken when handling the developer.

そこで、本考案の目的は、上述した従来の現像装置に
おける問題点に鑑み、現像ローラ上での現像剤の層厚を
一定化するために用いられる薄層化規制ローラへの現像
剤の再付着を防止して、良好な現像剤の層厚を設定でき
る構造を備えた現像装置を得ることにある。
Accordingly, an object of the present invention is to re-attach the developer to a thinning regulation roller used to stabilize the layer thickness of the developer on the developing roller in view of the above-described problems in the conventional developing device. It is another object of the present invention to obtain a developing device having a structure capable of setting a good developer layer thickness by preventing the above problem.

(課題を解決するための手段) この目的を解決するため、本考案は、感光体表面に形
成された静電潜像に一成分系非磁性現像剤を供給し上記
感光体と逆方向に回転する現像剤担持体と、上記現像剤
担持体上に付着する現像材層の厚さを均一に規制するた
めの薄層化規制ローラとを備え、上記薄層化規制ローラ
を上記現像剤担持体の下部に圧接させている現像装置に
おいて、上記薄層化規制ローラには電圧が印加されてお
り、上記現像剤担持体の回転方向において、上記現像剤
担持体と上記薄層化規制ローラとの対向部の下流側、か
つ、上記現像剤担持体と上記感光体との対向部の上流側
の上記現像材担持体の下方で、上記現像装置に対して着
脱可能な現像剤回収部を形成した導電性の現像剤回収部
材を配置し、上記現像剤回収部材の一端は上記薄層化規
制ローラの周面に当接させたスクレーパを有しており、
上記現像剤回収部材のもう一方の端部は、上記現像剤回
収部材を取り外す際に現像剤の流出を防止するための、
上記感光体と近接する位置に配置された逆流防止部材に
着脱自在に結合していることを提案するものである。
(Means for Solving the Problems) In order to solve this object, the present invention supplies a one-component non-magnetic developer to the electrostatic latent image formed on the surface of the photoreceptor and rotates the electrostatic latent image in a direction opposite to the photoreceptor. And a thinning regulating roller for uniformly regulating the thickness of the developer layer adhered on the developer carrying body, wherein the thinning regulating roller is attached to the developer carrying body. In the developing device pressed against the lower portion of the developing device, a voltage is applied to the thinning regulating roller, and the developer carrier and the thinning regulating roller are rotated in the rotation direction of the developer carrier. Downstream of the facing portion, and below the developer carrying member upstream of the facing portion between the developer carrying member and the photoconductor, a developer collecting portion detachable from the developing device was formed. A conductive developer collecting member is disposed, and one end of the developer collecting member is located on the upper side. It has a scraper that is in contact with the peripheral surface of the thinning regulation roller,
The other end of the developer collection member is for preventing the developer from flowing out when removing the developer collection member,
It is proposed to detachably couple to a backflow prevention member arranged at a position close to the photoconductor.

(作用) 本考案によれば、薄層化規制部材あるいは現像剤担持
体から飛散する現像剤を回収して薄層化規制部材への再
付着を防止することができる。また、本考案によれば、
現像剤回収部材の着脱時に、その回収部が傾いた際の現
像材の飛散は逆流防止部により阻止される。
(Operation) According to the present invention, it is possible to collect the developer scattered from the thinning regulating member or the developer carrying member and prevent re-adhesion to the thinning regulating member. According to the present invention,
When the developer collecting member is attached or detached, scattering of the developer when the collecting portion is inclined is prevented by the backflow prevention portion.

(実施例) 以下、第1図において本考案の実施例の詳細を説明す
る。
(Embodiment) Hereinafter, the embodiment of the present invention will be described in detail with reference to FIG.

現像装置1は、一成分系非磁性現像剤を用いるもので
あって、その内部には、感光体2と対向する位置に、矢
印の方向に回転可能なローラで構成された現像剤担持体
3が配置してある。
The developing device 1 uses a one-component non-magnetic developer. Inside the developing device 1, a developer carrier 3 is provided at a position facing the photoreceptor 2 and includes a roller rotatable in the direction of an arrow. Is arranged.

現像剤担持体3は、例えば、ゴム硬度が30〜50度(JI
SA)のNBR系もしくはウレタン系のゴムローラで構成さ
れた弾性体からなり、感光体2との対向部の接触位置で
感光体2と同一方向に回転して現像剤補給部材4から給
送された現像剤を表面に担持して感光体2に移送するよ
うになっている。
For example, the developer carrier 3 has a rubber hardness of 30 to 50 degrees (JI
SA) made of an elastic body composed of an NBR-based or urethane-based rubber roller, and rotated in the same direction as the photosensitive member 2 at the position of contact with the photosensitive member 2 and fed from the developer supply member 4. The developer is carried on the surface and transferred to the photoconductor 2.

現像剤補給部材4は現像剤担持体3の近傍に位置して
おり、例えば、導電処理を行った発泡性ポリウレタンに
より形成されたローラが用いられ、このローラにより現
像剤が現像剤担持体に擦り付けられる。現像剤担持体に
は摩擦帯電した現像剤を担持するために、例えば、−40
0Vの電圧が印加されている。
The developer replenishing member 4 is located in the vicinity of the developer carrier 3 and, for example, a roller formed of a foamed polyurethane subjected to a conductive treatment is used. The roller rubs the developer against the developer carrier. Can be To carry the triboelectrically charged developer on the developer carrier, for example, -40
A voltage of 0 V is applied.

現像剤担持体3の回転方向における感光体2との対向
位置の上流側には、現像剤担持体3上での現像剤の層厚
を一定化するための薄層化規制ローラ6が配設されてい
る。
On the upstream side of the position where the developer carrier 3 faces the photoconductor 2 in the rotation direction, a thinning regulating roller 6 for stabilizing the layer thickness of the developer on the developer carrier 3 is provided. Have been.

薄層化規制ローラ6は、例えば、ステンレス鋼等の硬
質性の金属ローラで構成されたドクター部材であり、そ
の回転支持部をバネ6A等の付勢手段により加圧されるこ
とで周面を現像剤担持体3との対向部の周面に圧接させ
ている。
The thinning regulating roller 6 is, for example, a doctor member composed of a hard metal roller such as stainless steel, and its peripheral surface is pressurized by an urging means such as a spring 6A. It is in pressure contact with the peripheral surface of the portion facing the developer carrier 3.

付勢手段は、弾性変形可能なものであれば良く、本実
施例の場合は片側600gfの圧縮コイルバネが用いられて
いる。また、このバネ圧縮コイルバネはこれに限るもの
ではなく、要求される画像濃度や現像剤担持体3の回転
トルク等により変更され得るものである。
The biasing means only needs to be elastically deformable, and in the case of the present embodiment, a compression coil spring of 600 gf on one side is used. Further, the spring compression coil spring is not limited to this, but can be changed according to the required image density, the rotational torque of the developer carrier 3 and the like.

薄層化規制ローラ6は、現像剤担持体3と同一方向に
回転するとともに、現像を行うための十分な電荷を注入
するために、電圧である−700Vの電圧が印加され、現像
剤担持体3の表面に担持された状態で移送されてくる現
像剤のうち、規定された層厚以上に相当する余分な現像
剤を擦り取っている。
The thinning regulating roller 6 rotates in the same direction as the developer carrier 3, and is supplied with a voltage of −700 V, which is a voltage, in order to inject a sufficient charge for performing development. Of the developer transferred while being carried on the surface of No. 3, excess developer corresponding to a specified layer thickness or more is scraped off.

薄層化規制ローラ6の回転方向における現像剤担持体
3との対向位置の上下流位置には、一端を薄層化規制ロ
ーラ6の周面に当接させた現像剤削ぎ落し用としての第
1、第2のスクレーパ7、8が配置してある。
At the upstream and downstream positions facing the developer carrier 3 in the rotation direction of the thinning regulating roller 6, a first end for contacting the peripheral surface of the thinning regulating roller 6 is used for scraping off the developer. First and second scrapers 7 and 8 are arranged.

各スクレーパのうち、現像剤担持体3との対向位置の
上流側に位置する第1のスクレーパ7は、ポリエステル
フィルム等の絶縁材料で形成してあり、後述する現像剤
回収部材9と現像剤担持体3との間での電気的な短絡を
生じさせないようになっている。
Among the scrapers, a first scraper 7 located on the upstream side of the position facing the developer carrier 3 is formed of an insulating material such as a polyester film. An electrical short circuit with the body 3 is prevented from occurring.

各スクレーパのうち、現像剤担持体3との対向位置の
下流側に位置する第2のスクレーパ8は、例えばステン
レス等の金属材料により形成されており、その他端を現
像剤補給部材4側に位置させて図示しない支持部に取り
付けられている。
Among the scrapers, a second scraper 8 located downstream of a position facing the developer carrier 3 is formed of a metal material such as stainless steel, and the other end is located at the developer supply member 4 side. It is attached to a support (not shown).

現像剤回収部材9は、現像剤担持体3の回転方向にお
いて、現像剤担持体3と薄層化規制ローラ6との対向部
の下流側、かつ、現像剤担持体3と感光体2との対向部
の上流側の現像材担持体3の下方に配置されており、現
像剤担持体3及び薄層化規制ローラ6の周面に飛散する
現像剤を回収できる凹状の空間すなわち現像剤回収部9A
を形成されている。
The developer collecting member 9 is located on the downstream side of the facing portion between the developer carrier 3 and the thinning regulating roller 6 in the rotation direction of the developer carrier 3 and between the developer carrier 3 and the photosensitive member 2. A concave space which is disposed below the developer carrier 3 on the upstream side of the facing portion and which can collect the developer scattered on the peripheral surfaces of the developer carrier 3 and the thinning regulating roller 6, that is, a developer collecting section. 9A
Is formed.

現像剤回収部材9は、一端に第1のスクレーパ7を有
しており、第1のスクレーパ7を有する端部とは別のも
う一方の、感光体2側の端部は逆流防止部材10に結合さ
れていて、導電性を持たせるために、例えば、アルミニ
ウム等の金属材料で形成してある。このような現像剤回
収部材9における導電性の設定は、現像剤回収部9Aに落
下した現像剤の除電を行うためである。
The developer collecting member 9 has a first scraper 7 at one end, and the other end on the photoconductor 2 side other than the end having the first scraper 7 is connected to the backflow preventing member 10. It is connected and made of a metal material such as aluminum to have conductivity. The setting of the conductivity in the developer collecting member 9 is for eliminating the charge of the developer dropped on the developer collecting section 9A.

逆流防止部材10は、現像剤担持体3上で規制された層
厚の現像剤が通過できる程度の隙間を設定した上でそれ
以外の隙間を塞ぐ状態に張り出しており、現像剤担持体
3上での必要最小限の量以上の現像剤の流出を阻止する
逆流防止部をなしている。
The backflow prevention member 10 sets a gap that allows the developer of a layer thickness regulated on the developer carrying member 3 to pass through, and protrudes to close the other gaps. And a backflow prevention portion for preventing the developer from flowing out of the minimum necessary amount.

従って、現像剤担持体3の周面あるいは薄層化規制ロ
ーラ6の周面から脱落した現像剤は、現像剤担持体3に
よる移送されるもの以外が飛散することもあるが、この
飛散現像剤は、回収部9Aに落下して回収されることにな
る。
Therefore, the developer that has fallen from the peripheral surface of the developer carrier 3 or the peripheral surface of the thinning regulating roller 6 may be scattered except for the one transported by the developer carrier 3. Is dropped into the collection unit 9A and collected.

現像剤回収部9Aは、現像剤回収部材9が第1のスクレ
ーパを含めて、紙面と直角方向で現像装置1に対して着
脱できるようになっており、回収部9A内に現像剤が満た
された場合に、現像剤回収部材9を取り外して回収した
現像剤を外部に移すことができるようになっている。現
像剤回収部材9の取り出しに際し、第1のスクレーパ7
の先端を薄層化規制ローラ6の周面から離間させるため
に、現像剤回収部材9と逆流防止部材10との結合の間
隙、すなわち結合部のがた付の範囲内で、多少傾けた場
合にあっても、回収部9A内の現像剤は逆流防止部材10が
堰部として機能するので、回収部9A内からの流出を未然
に防がれるようになっている。
The developer collecting section 9A is configured such that the developer collecting member 9 including the first scraper can be attached to and detached from the developing device 1 in a direction perpendicular to the paper surface, and the developer is filled in the collecting section 9A. In this case, the developer collecting member 9 is detached and the collected developer can be transferred to the outside. When removing the developer collecting member 9, the first scraper 7
Is slightly inclined within the gap of the connection between the developer recovery member 9 and the backflow prevention member 10, that is, within the range of the play of the connection portion, in order to separate the leading end of the roller from the peripheral surface of the thinning regulating roller 6. However, since the backflow preventing member 10 functions as a weir in the developer in the collection unit 9A, the developer in the collection unit 9A can be prevented from flowing out.

また、現像剤回収部材9は、金属材料で形成してある
ので、現像剤が回収部9Aに落下した場合、現像剤の帯電
電荷を放電させて、帯電による現像剤担持体3あるいは
薄層化規制ローラ6への再付着を防止するようになって
いる。
Further, since the developer collecting member 9 is formed of a metal material, when the developer falls to the collecting portion 9A, the developer is discharged by the charged charge of the developer, and the developer carrying member 3 or the thinned layer is charged. The re-adhesion to the regulating roller 6 is prevented.

本実施例は以上のような構造であるから、現像剤担持
体3はの現像剤の層厚を規制する薄層化規制ローラ6に
より現像剤担持体3の周面から除去された現像剤は、現
像剤回収部9Aにおける凹部形状と逆流防止部材10による
堰部とにより設定される閉鎖空間で飛散すると、この回
収部9A及び逆流防止部材10に接触することで除電されて
落下する。
Since the present embodiment has the above structure, the developer removed from the peripheral surface of the developer carrier 3 by the thinning regulating roller 6 for regulating the layer thickness of the developer in the developer carrier 3 is When the toner scatters in a closed space defined by the concave shape of the developer collecting portion 9A and the weir portion by the backflow preventing member 10, the developer contacts the collecting portion 9A and the backflow preventing member 10 to be neutralized and fall.

回収部9Aが現像剤で満ちた場合には、現像剤回収部材
9を取り出すことで現像剤の排出が可能になり、この取
り出しに際しての回収部9Aの傾きによる現像剤の溢れ現
象は逆流防止部材10の堰き止め機能により防止される。
本考案者等は、本考案の現像装置により、A4サイズの転
写紙を用いて10万枚毎に現像剤回収部材9を取り出して
清掃を行いながら30万枚の複写を行ったところ、画像品
質の良好な、つまり、地肌汚れや画像濃度のバラツキの
ない複写物を得ることができた。
When the collecting section 9A is full of the developer, the developer can be discharged by taking out the developer collecting member 9, and the overflow phenomenon of the developer due to the inclination of the collecting section 9A at the time of taking out the developer is prevented by the backflow preventing member. Prevented by 10 damming functions.
Using the developing device of the present invention, the present inventors took out the developer collecting member 9 every 100,000 sheets using A4 size transfer paper and performed 300,000 copies while cleaning the image. In other words, a copy having good image quality, that is, free from background stain and image density variation could be obtained.

上述した実施例は現像剤担持体を感光体に接触させる
構造を対象としたものであるが、感光体に現像剤担持体
を接触させない非接触現像方式を対象としてもよい。
Although the above-described embodiment is directed to a structure in which the developer carrier is brought into contact with the photoconductor, a non-contact developing method in which the developer carrier is not brought into contact with the photoconductor may be adopted.

(考案の効果) 以上、本考案によれば、現像剤担持体の下部位置に現
像剤の回収空間を有する導電性の現像剤回収部材を設
け、この現像剤回収部材を現像装置に対して着脱可能と
するとともに、この現像剤回収部材に回収された現像剤
は除電されて電圧印加されている現像剤担持体あるいは
薄層化規制ローラへの再付着を防止され、層厚設定のた
めの基準状態を変化させることがないので、現像剤担持
体上での現像剤の担持状態を一様に維持することで地肌
汚れや異常画像の原因となる層厚設定を変動させるよう
なことがなくなる。また、回収部に回収された現像剤の
排出が現像剤回収部材を取り出すだけの簡単な操作によ
り行え、しかも、その排出にあたって、現像剤回収部材
を外部に取り出す際に起こりがちな、現像剤回収部材の
傾斜に対しても逆流防止機構による堰き止め機能により
現像剤の流出を防止することができるので、現像剤の飛
散による各部材への再付着を未然に防止することができ
る。
(Effects of the Invention) As described above, according to the present invention, a conductive developer recovery member having a developer recovery space is provided at a lower position of the developer carrier, and the developer recovery member is attached to and detached from the developing device. In addition, the developer collected by the developer collecting member is neutralized, and is prevented from re-adhering to the developer carrier or the thinning regulating roller to which a voltage is applied, and a standard for setting the layer thickness is used. Since the state is not changed, the state of carrying the developer on the developer carrying member is maintained uniformly, so that the layer thickness setting which causes background contamination and abnormal images does not fluctuate. In addition, the developer collected in the collection section can be discharged by a simple operation of simply taking out the developer collection member. In addition, when the developer collection member is taken out to the outside, the developer collection is often performed. Even when the member is inclined, the outflow of the developer can be prevented by the blocking function by the backflow prevention mechanism, so that re-adhesion to each member due to the scattering of the developer can be prevented.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本考案の実施例の現像装置の全体構成を示す断
面図、第2図は従来の現像装置の要部構成を示す断面図
である。 1……現像装置、2……感光体、3……現像剤担持体、
6……薄層化規制ローラ、9……現像剤回収部材、9A…
…現像剤回収部、10……逆流防止部材。
FIG. 1 is a cross-sectional view showing the overall configuration of a developing device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the main configuration of a conventional developing device. 1, a developing device, a photoreceptor, a developer carrier,
6 ... thinning regulation roller 9 ... developer recovery member 9A ...
... developer recovery section, 10 ... backflow prevention member.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】感光体表面に形成された静電潜像に一成分
系非磁性現像剤を供給し上記感光体と逆方向に回転する
現像剤担持体と、上記現像剤担持体上に付着する現像材
層の厚さを均一に規制するための薄層化規制ローラとを
備え、上記薄層化規制ローラを上記現像剤担持体の下部
に圧接させている現像装置において、 上記薄層化規制ローラには電圧が印加されており、 上記現像剤担持体の回転方向において、上記現像剤担持
体と上記薄層化規制ローラとの対向部の下流側、かつ、
上記現像剤担持体と上記感光体との対向部の上流側の上
記現像材担持体の下方で、上記現像装置に対して着脱可
能な現像剤回収部を形成した導電性の現像剤回収部材を
配置し、 上記現像剤回収部材の一端は上記薄層化規制ローラの周
面に当接させたスクレーパを有しており、 上記現像剤回収部材のもう一方の端部は、上記現像剤回
収部材を取り外す際に現像剤の流出を防止するための、
上記感光体と近接する位置に配置された逆流防止部材に
着脱自在に結合していることを特徴とする現像装置。
An electrostatic latent image formed on a surface of a photoreceptor; a one-component non-magnetic developer supplied to the electrostatic latent image to rotate in a direction opposite to the photoreceptor; A regulating roller for uniformly regulating the thickness of the developing material layer to be formed, and wherein the regulating roller is pressed against a lower portion of the developer carrying member. A voltage is applied to the regulating roller, and in the rotation direction of the developer carrier, the downstream side of the facing portion between the developer carrier and the thinning regulating roller, and
A conductive developer collecting member having a developer collecting portion detachable with respect to the developing device is formed below the developer carrying member on the upstream side of the opposing portion between the developer carrying member and the photoconductor. One end of the developer collecting member has a scraper in contact with a peripheral surface of the thinning regulating roller, and the other end of the developer collecting member is To prevent the developer from flowing out when removing the
A developing device, which is detachably connected to a backflow prevention member disposed at a position close to the photoconductor.
JP1989121818U 1989-10-18 1989-10-18 Developing device Expired - Lifetime JP2536108Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989121818U JP2536108Y2 (en) 1989-10-18 1989-10-18 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989121818U JP2536108Y2 (en) 1989-10-18 1989-10-18 Developing device

Publications (2)

Publication Number Publication Date
JPH0360355U JPH0360355U (en) 1991-06-13
JP2536108Y2 true JP2536108Y2 (en) 1997-05-21

Family

ID=31669839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989121818U Expired - Lifetime JP2536108Y2 (en) 1989-10-18 1989-10-18 Developing device

Country Status (1)

Country Link
JP (1) JP2536108Y2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5327573B2 (en) * 2007-10-31 2013-10-30 株式会社リコー Developing device, process unit, and image forming apparatus
JP5540787B2 (en) * 2010-03-16 2014-07-02 富士ゼロックス株式会社 Developing device, image forming apparatus
JP6708441B2 (en) * 2016-02-29 2020-06-10 キヤノン株式会社 Developer cartridge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6134795A (en) * 1984-07-25 1986-02-19 Nec Corp Read only memory
JPS6396678A (en) * 1986-10-13 1988-04-27 Matsushita Electric Ind Co Ltd Image forming device

Also Published As

Publication number Publication date
JPH0360355U (en) 1991-06-13

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