JPH0480774A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH0480774A JPH0480774A JP2195777A JP19577790A JPH0480774A JP H0480774 A JPH0480774 A JP H0480774A JP 2195777 A JP2195777 A JP 2195777A JP 19577790 A JP19577790 A JP 19577790A JP H0480774 A JPH0480774 A JP H0480774A
- Authority
- JP
- Japan
- Prior art keywords
- cover
- case
- pressing
- pressing force
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000007786 electrostatic charging Methods 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 17
- 210000000078 claw Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、電子写真式カラープリンター等に適用される
現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a developing device applied to an electrophotographic color printer or the like.
（従来の技術）
非磁性−成分現像剤を用いる現像装置においては、帯電
ブレードを現像ローラに押し当てて、トナーが帯電ブレ
ードと現像ローラスリーブの間にはさまって出て来るこ
とにより、このトナーを帯電させる。このときに帯電ブ
レードの圧力によってトナーの帯電量が変わってくるの
で、トナーに適当な帯電量を与えるためには帯電ブレー
ドの圧力を適当な値に調整する必要がある。(Prior Art) In a developing device using a non-magnetic component developer, a charging blade is pressed against a developing roller, and the toner is caught between the charging blade and the developing roller sleeve and comes out. Charge. At this time, the amount of charge on the toner changes depending on the pressure of the charging blade, so it is necessary to adjust the pressure of the charging blade to an appropriate value in order to give the toner an appropriate amount of charge.
このような現像装置の従来例を第４図を参照して説明す
る。A conventional example of such a developing device will be explained with reference to FIG.
同図に示す現像装置１００は、ケース１００ａ内の現像
ローラ１０１に当接している帯電ブレード１０２を、支
軸１０３に回転可能に取付けた支持体１０４により支持
するとともに、この支持体１０４を蓋板１０５にねじ込
んだ調整ねじ１０６により支軸１０３を支点として回動
することで、前記帯電ブレード１０２の突出端の現像ロ
ーラ１、０１に対する押圧力を調整するようになってい
る。In the developing device 100 shown in the figure, a charging blade 102 in contact with a developing roller 101 in a case 100a is supported by a support 104 rotatably attached to a support shaft 103, and this support 104 is connected to a cover plate. The pressing force of the protruding end of the charging blade 102 against the developing rollers 1 and 01 is adjusted by rotating the charging blade 102 about the support shaft 103 by means of an adjustment screw 106 screwed into the charging blade 105 .
このとき、調整ねじ１０６の回転により支持体１０４が
回動するので、この場合のトナーのシール構造が問題と
なる。At this time, since the support body 104 rotates due to the rotation of the adjustment screw 106, the toner sealing structure in this case becomes a problem.
前記現像装置１００においては、蓋板１０５を支持体１
０４との間にモルトプレーンのような弾性材１０７を介
在させ、支持体１０４が回動してもケース１００ａ内の
トナーが外部に洩れないようにしている。尚、第４図中
、１１０は感光体である。In the developing device 100, the cover plate 105 is attached to the support 1.
An elastic material 107 such as Moltoprene is interposed between the case 100a and the case 100a to prevent the toner inside the case 100a from leaking to the outside even when the support 104 rotates. In addition, in FIG. 4, 110 is a photoreceptor.
（発明が解決しようとする課題）
しかしながら、前記現像装置１００の場合、構造が複雑
で、かつ弾性材１０７のために支持体１０４の回動が円
滑でなくなり、帯電ブレード１０２の押圧力の調整が難
しくなるという問題がある。(Problems to be Solved by the Invention) However, in the case of the developing device 100, the structure is complicated, and the support body 104 does not rotate smoothly due to the elastic material 107, making it difficult to adjust the pressing force of the charging blade 102. The problem is that it becomes difficult.
また、従来においては、支持体１０４を蓋板１０５に直
接固定したものもあるか、この場合には、支持体１０４
の回動が不能となって押圧力の調整が不能になるという
問題がある。Furthermore, in the past, the support body 104 was fixed directly to the cover plate 105, or in this case, the support body 104
There is a problem in that it becomes impossible to rotate and adjustment of the pressing force becomes impossible.
そこで、本発明は、帯電ブレードの押圧力の調整を現像
剤の洩れを回避しつつ容易に行うことが可能な現像装置
を提供することを目的とするものである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a developing device that can easily adjust the pressing force of a charging blade while avoiding developer leakage.
［発明の構成コ
（課題を解決するための手段）
本発明は、現像剤を収容したケースと、このケース内の
現像剤を搬送して像担持体に付着させる現像ローラと、
前記現像ローラに対し接触配置した帯電ブレードと、こ
の帯電ブレードの現像ローラに対する押圧力を調整可能
な状態でこの帯電ブレードを支持する押圧力調整機構部
とを有する現像装置において、前記押圧力調整機構部と
ケースとの間の開口部をシール部材を介して覆う蓋体と
、この蓋体を前記押圧力調整機構部及びケース側に押圧
するケースに対し着脱可能な蓋体押圧手段とを具備する
ものである。[Structure of the Invention (Means for Solving the Problems)] The present invention includes a case containing a developer, a developing roller that conveys the developer in the case and makes it adhere to an image carrier,
In the developing device, the developing device includes a charging blade disposed in contact with the developing roller, and a pressing force adjustment mechanism section that supports the charging blade in a state where the pressing force of the charging blade against the developing roller can be adjusted. A lid body that covers an opening between the part and the case via a sealing member, and a lid pressing means that is detachable from the case and presses the lid body toward the pressing force adjustment mechanism part and the case side. It is something.
（作 用）
上述した構成の現像装置によれば、蓋体押圧手段により
蓋体をシール部材を介して押圧力調整機構部及びケース
側に押圧する構成であるから、ケース内の現像剤の洩れ
がなくなるとともに、押圧力調整機構部による弾性ブレ
ードの押圧力調整も同等支障なく行うことができる。(Function) According to the developing device having the above-mentioned structure, since the lid pressing means presses the lid against the pressing force adjustment mechanism and the case side through the sealing member, leakage of the developer inside the case is prevented. In addition, the pressing force of the elastic blade can be adjusted by the pressing force adjusting mechanism section without any problem.
（実施例） 以下に本発明の実施例を詳細に説明する。(Example) Examples of the present invention will be described in detail below.
まず、第３図を参照して本実施例の現像装置１を含む画
像形成装置ｔ５０について説明する。First, an image forming apparatus t50 including the developing device 1 of this embodiment will be described with reference to FIG.
第３図中、５は像担持体としてのドラム状の感光体であ
り、原稿の画像情報に基くレーザ光は、読取光学系１２
のポリゴンミラー１８．ｆθレンズ９１反射鏡１０ａ、
１０ｂ、 シリンダレンズ１１を経て感光体５表面に当
り、この感光体５の軸方向に走査される。これにより、
帯電チャージャ３による感光体５上の帯電を部分的に消
滅させて、感光体５上に所謂静電潜像を作る。感光体５
が矢印のように回転して、感光体５の潜像の形成された
部分が位置５１Ｂに来ると、感光体５上にプラスチック
の微粒子、所謂トナーが現像装置１によって付着させら
れる。これによって静電潜像は現像され可視化される。In FIG. 3, 5 is a drum-shaped photoreceptor as an image carrier, and a laser beam based on the image information of the original is transmitted to the reading optical system 12.
Polygon mirror 18. fθ lens 91 reflecting mirror 10a,
10b, it hits the surface of the photoreceptor 5 through the cylinder lens 11 and is scanned in the axial direction of the photoreceptor 5. This results in
The charge on the photoreceptor 5 caused by the charger 3 is partially eliminated to form a so-called electrostatic latent image on the photoreceptor 5. Photoreceptor 5
rotates in the direction of the arrow, and when the portion of the photoreceptor 5 on which the latent image is formed comes to position 51B, plastic particles, so-called toner, are deposited on the photoreceptor 5 by the developing device 1. As a result, the electrostatic latent image is developed and made visible.
可視像の部分が位１１５１ｃに来ると転写ドラム６に巻
き付けられた転写紙Ｐに可視像は転写される。When the visible image portion reaches position 1151c, the visible image is transferred onto the transfer paper P wound around the transfer drum 6.
転写残りのトナーはクリーナー２６によって拭きとられ
る。感光体５上に残った残留トナーは、除電消去ランプ
７によって除去され感光体５は次のサイクルに入る。The remaining toner after transfer is wiped off by a cleaner 26. The residual toner remaining on the photoreceptor 5 is removed by the static eliminating erase lamp 7, and the photoreceptor 5 enters the next cycle.
一方転写紙Ｐは給紙カセット２３に蓄えられている。給
紙の際は転写ドラム６は第３図に示す位置から１８０°
回転した位置で停止する。このとき、感光体５も同期し
て停止する。次にグリッパ−１３が開き、次に給紙ロー
ラ１７が１回転して転写紙Ｐをグリッパ−１３に突き当
てる。次にグリッパ−１３が閉じ、転写紙Ｐの先端をは
さんだ状態で感光体５とともに回り出し、所定の位置に
グリッパ−１３が来たときに転写ドラム６だけとめる。On the other hand, transfer paper P is stored in a paper feed cassette 23. When feeding paper, the transfer drum 6 is rotated 180° from the position shown in Figure 3.
Stops at the rotated position. At this time, the photoreceptor 5 also stops in synchronization. Next, the gripper 13 opens, and then the paper feed roller 17 rotates once to abut the transfer paper P against the gripper 13. Next, the gripper 13 closes and rotates together with the photoreceptor 5 while holding the leading edge of the transfer paper P. When the gripper 13 reaches a predetermined position, only the transfer drum 6 is stopped.
これにより感光体５の画出しプロセスが始まり、感光体
５上に画像が書き込まれると、画像の先端に同期して転
写ドラム６は再び回り出し、転写ドラム６に加えられた
バイアス電圧によって、感光体５上の可視像を転写紙Ｐ
に転写し、転写ドラム６か１周した状態で再び転写ドラ
ム６を停止させる。This starts the image forming process on the photoreceptor 5, and when an image is written on the photoreceptor 5, the transfer drum 6 starts rotating again in synchronization with the leading edge of the image, and the bias voltage applied to the transfer drum 6 causes The visible image on the photoreceptor 5 is transferred to the transfer paper P.
After the transfer drum 6 has completed one rotation, the transfer drum 6 is stopped again.
次に多色構成の現像装置１の保持枠４を４５゜回転させ
て、現像装置１を違う色のものに変え、画出しプロセス
を再び行う。Next, the holding frame 4 of the multicolor developing device 1 is rotated by 45 degrees to change the developing device 1 to a different color, and the image forming process is performed again.
順次４回画出しプロセスを行った後排紙処理を行う。After performing the image output process four times in sequence, paper ejection processing is performed.
排紙工程においてはグリッパ−１３が剥離爪１９の位置
で開くように図示していないカムか動作する。In the paper ejecting process, a cam (not shown) operates so that the gripper 13 opens at the position of the peeling claw 19.
次に転写ドラム６か回り出し、グリッパ−１３が剥離爪
１９の位置に到達する前に、剥離爪１９が剥離位置１９
ｂにセットされる。これにより、転写ドラム６に巻き付
いていた転写紙Ｐは剥離爪１９により案内されて定着器
１５を経て排紙トレイ１６に排出される。Next, the transfer drum 6 begins to rotate, and before the gripper 13 reaches the position of the peeling claw 19, the peeling claw 19 moves to the peeling position 19.
Set to b. As a result, the transfer paper P that has been wrapped around the transfer drum 6 is guided by the peeling claw 19 and is ejected to the paper ejection tray 16 via the fixing device 15.
尚、第３図中、１７は給紙ローラ、１４は給紙路である
。In FIG. 3, 17 is a paper feed roller, and 14 is a paper feed path.
次に本実施例の現像装置１について、第１図。Next, FIG. 1 shows the developing device 1 of this embodiment.
第２図を参照して詳述する。This will be explained in detail with reference to FIG.
この現像装置１は、全体として直方体状で、現像剤とし
てのトナーＴを収容するケース３０内に、感光体６に対
峙する現像ローラ３１．トナーＴのかき落しローラ３２
．トナーＴの攪拌ローラ３３を配置している。The developing device 1 has a rectangular parallelepiped shape as a whole, and is housed within a case 30 that accommodates toner T as a developer, and includes a developing roller 31 facing a photoreceptor 6. Toner T scraping roller 32
．． A stirring roller 33 for toner T is arranged.
前記現像ローラ３１の上部には、押圧力調整機構部３４
が配置され、この押圧力調整機構部３４により、帯電ブ
レード３５を現像ローラ３１に対する押圧力が調整可能
な状態に支持している。A pressing force adjustment mechanism section 34 is provided above the developing roller 31.
is arranged, and the charging blade 35 is supported by the pressing force adjustment mechanism 34 so that the pressing force against the developing roller 31 can be adjusted.
押圧力調整機構部３４は、ケース３０のサイドフレーム
３０ａに取付けた支軸３６によりステイ３７を回動可能
に支持するとともに、サイドフレーム３０ａに取付けた
固定板３８にねじ込んだねじ３９をスティ３７に当接さ
せ、ねじ３９を回すことによりステイ３７を支軸３６を
中心として回動させるようになっている。The pressing force adjustment mechanism 34 rotatably supports the stay 37 by a support shaft 36 attached to the side frame 30a of the case 30, and also connects the stay 37 with a screw 39 screwed into a fixing plate 38 attached to the side frame 30a. By bringing them into contact and turning the screw 39, the stay 37 is rotated about the support shaft 36.
前記ケース３０の上側の開口部には、蓋体４０と、この
蓋体４０を矢印α方向に押圧する蓋体押圧手段４１か配
置されている。即ち、蓋体４０の一方の端部はケース３
０の背板部上端に設けた受枠３０ｂに対しＯリングの如
きシール部材４２を介して嵌着され、また、蓋体４０の
他方の端部は前記スティ３７の側壁にやはりシール部材
４２を介して嵌着され、開口部を封止するようになって
いる。A lid 40 and lid pressing means 41 for pressing the lid 40 in the direction of arrow α are disposed in the upper opening of the case 30. That is, one end of the lid 40 is connected to the case 3.
The other end of the lid body 40 is fitted onto the side wall of the stay 37 through a seal member 42, such as an O-ring, into a receiving frame 30b provided at the upper end of the back plate portion of the lid body 40. It is designed to fit into the opening and seal the opening.
前記蓋体押圧手段４１は、サイドフレーム３０ａから突
設した固定ピン４３にコイルばね４４の一端を着脱可能
に掛けるとともに、コイルばね４４の他端とケース３０
の底部にねじ込んだ固定ねじ４５との間にワイヤ４６を
張り渡すことにより、前記コイルはね４４の押圧力か矢
印α方向に作用するようにしている。The lid pressing means 41 removably hooks one end of the coil spring 44 to a fixing pin 43 protruding from the side frame 30a, and connects the other end of the coil spring 44 to the case 30.
By extending a wire 46 between the wire 46 and a fixing screw 45 screwed into the bottom of the coil, the pressing force of the coil spring 44 acts in the direction of the arrow α.
上述した現像装置１によれば、蓋体押圧手段４１のコイ
ルばね４４か蓋体４０を矢印α方向に押圧し、シール部
材４２をスティ３７に圧接するので、開口部のシールが
完全となり、これにより、トナーＴの洩れが防止される
。また、帯電ブレード３５の押圧力の調整もねじ３９を
回すだけで容易に行うことができ、この際、蓋体４０の
存在は同等障害とならないため、円滑に帯電ブレード３
５の押圧力の調整が実行可能となる。According to the above-described developing device 1, the coil spring 44 of the lid pressing means 41 presses the lid 40 in the direction of the arrow α, and the sealing member 42 is pressed against the stay 37, so that the opening is completely sealed. This prevents the toner T from leaking. Further, the pressing force of the charging blade 35 can be easily adjusted by simply turning the screw 39. At this time, the presence of the lid 40 does not pose an obstacle, so the charging blade 35 can be smoothly adjusted.
Adjustment of the pressing force in step 5 becomes possible.
本発明は上述した実施例のほか、その要旨の範囲内で種
々の変形が可能である。In addition to the embodiments described above, the present invention can be modified in various ways within the scope of its gist.
［発明の効果］
以上詳述した本発明によれば、帯電ブレードの押圧力の
調整を現像剤の洩れを回避しつつ円滑に行うことが可能
な現像装置を提供することができる。[Effects of the Invention] According to the present invention described in detail above, it is possible to provide a developing device that can smoothly adjust the pressing force of the charging blade while avoiding developer leakage.
第１図は本発明の実施例装置の断面図、第２図は同上の
斜視図、第３図は実施例装置を含む画像形成装置の断面
図、第４図は従来例の断面図である。
１・・・現像装置、 ３０・・・ケース、３
１・・・現像ローラ、 ３５・・・帯電ブレード、
３４・・・押圧力調整機構部、４０・・・蓋体、４１・
・・蓋体押圧手段。
第
図FIG. 1 is a cross-sectional view of an apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the same as above, FIG. 3 is a cross-sectional view of an image forming apparatus including the apparatus according to the embodiment, and FIG. 4 is a cross-sectional view of a conventional example. . 1...Developing device, 30...Case, 3
1...Developing roller, 35...Charging blade,
34...Pushing force adjustment mechanism section, 40...Lid body, 41.
...Lid pressing means. Diagram
Claims (1)
送して像担持体に付着させる現像ローラと、前記現像ロ
ーラに対し接触配置した帯電ブレードと、この帯電ブレ
ードの現像ローラに対する押圧力を調整可能な状態でこ
の帯電ブレードを支持する押圧力調整機構部とを有する
現像装置において、 前記押圧力調整機構部とケースとの間の開口部をシール
部材を介して覆う蓋体と、この蓋体を前記押圧力調整機
構部及びケース側に押圧するケースに対し着脱可能な蓋
体押圧手段とを具備することを特徴とする現像装置。[Scope of Claims] A case containing a developer, a developing roller that conveys the developer in the case and makes it adhere to an image carrier, a charging blade that is arranged in contact with the developing roller, and a charging blade that is arranged in contact with the developing roller. In a developing device having a pressing force adjustment mechanism that supports the charging blade in a state where the pressing force against the developing roller can be adjusted, an opening between the pressing force adjustment mechanism and the case is covered with a sealing member. 1. A developing device comprising: a lid; and lid pressing means that is removably attached to a case that presses the lid toward the pressing force adjustment mechanism and the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2195777A JPH0480774A (en) | 1990-07-23 | 1990-07-23 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2195777A JPH0480774A (en) | 1990-07-23 | 1990-07-23 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0480774A true JPH0480774A (en) | 1992-03-13 |
Family
ID=16346794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2195777A Pending JPH0480774A (en) | 1990-07-23 | 1990-07-23 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0480774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0679959A2 (en) * | 1994-04-28 | 1995-11-02 | Canon Kabushiki Kaisha | Developing means frame, process cartridge and image forming apparatus |
| JP2012230203A (en) * | 2011-04-25 | 2012-11-22 | Ricoh Co Ltd | Development device and image forming apparatus |
-
1990
- 1990-07-23 JP JP2195777A patent/JPH0480774A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0679959A2 (en) * | 1994-04-28 | 1995-11-02 | Canon Kabushiki Kaisha | Developing means frame, process cartridge and image forming apparatus |
| EP0679959A3 (en) * | 1994-04-28 | 1997-11-19 | Canon Kabushiki Kaisha | Developing means frame, process cartridge and image forming apparatus |
| US5815644A (en) * | 1994-04-28 | 1998-09-29 | Canon Kabushiki Kaisha | Developing frame, process cartridge and image forming apparatus |
| JP2012230203A (en) * | 2011-04-25 | 2012-11-22 | Ricoh Co Ltd | Development device and image forming apparatus |
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