JPS5810748B2 - Genzo Sochi - Google Patents
Genzo SochiInfo
- Publication number
- JPS5810748B2 JPS5810748B2 JP49059920A JP5992074A JPS5810748B2 JP S5810748 B2 JPS5810748 B2 JP S5810748B2 JP 49059920 A JP49059920 A JP 49059920A JP 5992074 A JP5992074 A JP 5992074A JP S5810748 B2 JPS5810748 B2 JP S5810748B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- magnetic roller
- magnetic
- developing device
- scraping plate
- 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
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、磁気現像装置に係り、特に、不作動時に被現
像面に悪影響を与えない良好な構成の現像装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic developing device, and more particularly to a developing device with a favorable structure that does not adversely affect the surface to be developed when it is not in operation.
現像装置の磁気ローラは現像時のみ現像粉を付着して感
光体をこすり現像に供し、現像時板外には感光体に現像
粉が接触しこすることがないようにするのが実用上望ま
しい。For practical purposes, it is desirable that the magnetic roller of the developing device adhere developer powder only during development and rub the photoreceptor for development, so that the developer powder does not come into contact with the photoreceptor outside the plate during development. .
又、多色現像に際しては異なる色現像剤を使用するので
一色を現像する間に他色現像剤が被現像面に接すること
があれば混色の原因となるので絶対に防止しなければな
らない。Further, when developing multiple colors, different color developers are used, so if the developer of another color comes into contact with the surface to be developed while developing one color, this will cause color mixing, which must be absolutely prevented.
従来、第１図に示す如く、磁気ローラ１に対し、現像剤
かき落し部材２を当接せしめ、現像時には矢示Ａ方向に
回転し、現像剤を被現像面に供し、一方非現像時には矢
示Ｂ方向に回転し磁気ブラシの除去された面を被現像面
に向ける如くしたものである。Conventionally, as shown in FIG. 1, a developer scraping member 2 is brought into contact with a magnetic roller 1, and rotates in the direction of arrow A during development to apply the developer to the surface to be developed. It rotates in the direction shown B so that the surface from which the magnetic brush has been removed is directed toward the surface to be developed.
則わち、この様な構成では、矢示Ａ方向回転時にはかき
落し板２面と磁気ローラ１の該当接面との交角が鈍角θ
Ａを成すので現像剤を容易にかき落す。In other words, in such a configuration, when rotating in the direction of arrow A, the intersection angle between the two surfaces of the scraping plate and the corresponding contact surface of the magnetic roller 1 is an obtuse angle θ.
A, the developer can be easily scraped off.
しかし、矢示Ｂ方向回転時には、該交角が鋭角θＢを成
すので、現像剤が、該部分に圧入され摩擦力が犬となる
ので駆動源に異常な負荷を強いる結果となり好ましいも
のでない。However, when rotating in the direction of arrow B, the intersecting angle forms an acute angle θB, so the developer is press-fitted into the portion and the frictional force is increased, which is undesirable as it imposes an abnormal load on the drive source.
又、Ａ方向回転時に、既にかき落し板に付着していた現
像剤が逆転時に磁気ローラのかき落し面に再付着して、
搬送される恐れもあり、更に摩擦圧力でかき蓄板が浮き
該当接部を通過してかき落しの効果すら果さない結果と
なる可能性もある。Also, when rotating in the A direction, the developer that had already adhered to the scraping plate re-attaches to the scraping surface of the magnetic roller when the rotation is reversed.
There is a risk that the scraping plate will be transported, and there is also a possibility that the scraping plate will float due to the frictional pressure and pass through the contact area, resulting in no scraping effect.
しかも、このかき落し板を動作せしめる構成では、機械
的或は電気的に接離せしめる機構を要し、それだけ制御
部品を要することとなった。Furthermore, the structure for operating the scraping plate requires a mechanism for mechanically or electrically bringing it into contact and separating it, which requires a corresponding number of control parts.
本発明は、上記の点に鑑み成されたもので、新規で優れ
た現像装置を提供することを目的とする。The present invention has been made in view of the above points, and an object of the present invention is to provide a new and excellent developing device.
即ち、本発明は現像剤を保持し、被現像面へ現像剤を供
する磁気ローラを有する現像装置において、現像時と非
現像時とで移動方向が逆転する磁気ローラと、前記磁気
ローラ側の端部を磁気ローラに対して接離自在に支持し
たかき落し部材であって、現像時には該部材が現像剤に
より持ち上げられて該部材の下を現像剤が通過するよう
磁気ローラから離れる第１の位置と、非現像時には該部
材が現像剤により磁気ローラ側に押しやられて現像剤を
かき落すよう磁気ローラに当接する第２の位置をとるか
き落し部材とを有することを特徴とする現像装置である
。That is, the present invention provides a developing device having a magnetic roller that holds a developer and supplies the developer to a surface to be developed. a scraping member that supports a portion of the scraper so as to be movable toward and away from the magnetic roller, the scraping member being at a first position away from the magnetic roller so that during development, the member is lifted by the developer and the developer passes under the member; and a scraping member that assumes a second position where it comes into contact with the magnetic roller so that the developer is pushed toward the magnetic roller side and scrapes off the developer when not developing. .
本発明に言う「磁気ローラロとは、棒状磁石を用いる磁
気ローラに限らず非磁性円筒内に磁力源を設けたスリー
ブ型をも含む。The term "magnetic roller" used in the present invention is not limited to magnetic rollers using bar-shaped magnets, but also includes sleeve-type rollers in which a magnetic source is provided within a non-magnetic cylinder.
又現像剤は、単に非磁性トナーを磁気性キャリヤーに付
着して用いる現像剤に限らず、磁性トナーを用いる現像
剤も用いうろことは勿論である。Further, the developer is not limited to a developer using simply non-magnetic toner attached to a magnetic carrier, but it goes without saying that a developer using magnetic toner can also be used.
以下本発明の詳細を具体例により図面を参照して説明す
る。The details of the present invention will be explained below using specific examples with reference to the drawings.
第２図に示すのが、本発明実施例装置構成を説明するも
ので、かき落し板２は筐体に軸支固定した端Ｃを有し他
端りは可動とする。FIG. 2 illustrates the configuration of an apparatus according to an embodiment of the present invention, in which the scraping plate 2 has an end C that is pivoted and fixed to the casing, and the other end is movable.
４はカバー３とかき落し板との開口をシールするシール
材（例えばポリエチレン）、このかき落し板２は磁気ロ
ーラ１に軽く、接触していて、面と面のなす角度、＜Ｏ
ＤＣが＜ＯＤＣ≧９０°を形成するように構成したもの
である。4 is a sealing material (for example, polyethylene) that seals the opening between the cover 3 and the scraping plate. The scraping plate 2 is in light contact with the magnetic roller 1, and the angle between the surfaces is <O.
The structure is such that DC satisfies <ODC≧90°.
これが現像時の正回転方向（Ａ方向）に回転する時は、
磁気ローラに付着した現像粉がかき落し板面を何なく持
上げてかき落し板２の下を通過する。When this rotates in the forward rotation direction (direction A) during development,
The developer powder adhering to the magnetic roller passes under the scraping plate 2 while lifting the surface of the scraping plate.
そして次に、磁気ドラムが逆回転する場合（Ｂ方向）に
は現像粉とＤ端の摩擦抵抗力によりかき落し板面に食い
込み力が働き現像粉はこのかき落し板のＤ端を磁気ロー
ラ１に押し付け、これにより現像粉は磁気ローラ１から
かき落されて磁気ローラに現像粉を付着させることはな
い。Next, when the magnetic drum rotates in the opposite direction (direction B), the frictional resistance between the developer powder and the D end causes a force to bite into the surface of the scraping plate, causing the developer powder to move from the D end of the scraping plate to the magnetic roller 1. As a result, the developer powder is scraped off from the magnetic roller 1, and the developer powder does not adhere to the magnetic roller 1.
また、このかき落し板の材料としてゴム及びプラスチッ
ク等の合成樹脂シート等の弾性体を用いても同様の効果
が得られる。Further, the same effect can be obtained by using an elastic body such as a synthetic resin sheet such as rubber or plastic as the material of the scraping plate.
尚この時は第３図に示す様にかき落し板２のＣ端は第２
図実施例の如く可動にせず固定できるため、このかき落
し板のＣ端が現像剤による目づまり等による機械的動作
の不安定さを発生することがなく有効である。At this time, as shown in Fig. 3, the C end of the scraping plate 2 is at the second
Since it can be fixed without being movable as in the illustrated embodiment, it is effective because the C end of the scraping plate does not become clogged with developer and cause instability in mechanical operation.
又、この如き落し板を被現像面と現像剤が接する部分の
近傍に配置すると、短時間に非動作状態とできて極めて
効果的である。Further, if such a drop plate is placed near the area where the surface to be developed and the developer come into contact, it is extremely effective because it can be brought into a non-operating state in a short period of time.
第４図に示すのが、白黒コピー用の単色電子写真複写装
置に、第５図に示すのがカラー用の多色電子写真複写装
置に各々本発明に基く現像装置を適用した例を説明する
ものである。FIG. 4 shows an example in which the developing device according to the present invention is applied to a monochrome electrophotographic copying device for black and white copying, and FIG. 5 shows an example in which the developing device based on the present invention is applied to a multicolor electrophotographic copying device for color copying. It is something.
図中、５は現像装置で感光ドラム６上に帯電器７で一様
帯電し、光学系８により露光形成した静電像を現像する
ものである。In the figure, reference numeral 5 denotes a developing device which uniformly charges the photosensitive drum 6 with a charger 7 and develops an electrostatic image formed by exposure with an optical system 8.
現像器は、転写材供給カセット９より供された転写材Ｐ
上にコロナ転写１０等で転写し、定着器１１で定着しコ
ピーを供存し、一方感光ドラム６表面はクリーニング手
段１２でクリーニングし青用に供される。The developing device receives the transfer material P supplied from the transfer material supply cassette 9.
The photosensitive drum 6 is transferred onto the photosensitive drum 6 using a corona transfer 10 or the like and fixed by a fixing device 11 to provide a copy, while the surface of the photosensitive drum 6 is cleaned by a cleaning means 12 and used for blue printing.
一方多色再現に於ては第５図示の如く、色分解手段８Ａ
により各色ごとに潜像形成現像された各色像を重畳重ね
合わせする為、転写ドラム１３を備え、該ドラム上に転
写紙を保持し所定回数転写を成ししかる後分離爪１４が
動作してカラーコピーを供するものである。On the other hand, in multicolor reproduction, as shown in Figure 5, color separation means 8A
To form a latent image for each color and superimpose the developed color images, a transfer drum 13 is provided, and after the transfer paper is held on the drum and transferred a predetermined number of times, the separating claw 14 operates to separate the color images. A copy shall be provided.
特にこの様な多色電子写真複写装置に於て非動作中の現
像器の影響を感光体に及ぼさないことが重要であり、上
記構成で極めて有効に効果を得ていることは明らかであ
る。Particularly in such a multicolor electrophotographic copying apparatus, it is important that the photoreceptor is not affected by the inactive developing device, and it is clear that the above configuration is extremely effective.
以上詳述の如く、本発明装置は、磁気ローラ等の現像剤
搬送体に過負荷をかけることなく、現像動作を成し、非
動作に際しては該搬送体面の現像剤を短時間に効率的に
かき落し除去し感光体に影響を及ぼすことがないので、
極めて有効なるものである。As described in detail above, the device of the present invention performs the developing operation without overloading the developer conveyance member such as a magnetic roller, and efficiently removes the developer on the surface of the conveyor body in a short time when the device is not in operation. Since it is scraped off and removed and does not affect the photoreceptor,
It is extremely effective.
しかも、該かき落し部材の動作は、該搬送体移動方向で
作用するので余分な制御要素を必要とせず構造も極めて
簡易となしうる点製造上保守上有効なるものである。Furthermore, since the scraping member operates in the direction of movement of the carrier, no extra control elements are required and the structure is extremely simple, which is effective in terms of manufacturing and maintenance.
第１図は従来の現像装置を説明するものである。
第２図は本発明に基く構成を説明するもので、第３図は
、変形例を説明するものである。
第４図は単色電子写真複写装置に、第５図は多色電子写
真複写装置に本発明装置を適用したものである。
図中１は磁気ローラ、２はかき落し板、３はカバー、４
はシール材である。FIG. 1 illustrates a conventional developing device. FIG. 2 illustrates a configuration based on the present invention, and FIG. 3 illustrates a modified example. FIG. 4 shows a monochrome electrophotographic copying machine, and FIG. 5 shows a multicolor electrophotographic copying machine in which the present invention is applied. In the figure, 1 is a magnetic roller, 2 is a scraping plate, 3 is a cover, and 4
is a sealing material.
Claims (1)
ーラを有する現像装置において、現像時と非現像時とで
移動方向が逆転する磁気ローラと、前記磁気ローラ側の
端部を磁気ローラに対して接離自在に支持したかき落し
部材であって、現像時には該部材が現像剤により持ち上
げられて該部材の下を現像剤が通過するよう磁気ローラ
から離れる第１の位置と、非現像時には該部材が現像剤
により磁気ローラ側に押しやられて現像剤をかき落すよ
う磁気ローラに当接する第２の位置をとるかき落し部材
とを有することを特徴とする現像装置。1. In a developing device having a magnetic roller that holds a developer and supplies the developer to a surface to be developed, the magnetic roller has a magnetic roller whose moving direction is reversed during development and non-development, and an end portion on the side of the magnetic roller that is connected to the magnetic roller. a scraping member supported so as to be movable towards and away from the magnetic roller, the scraping member being supported at a first position away from the magnetic roller so that the member is lifted by the developer during development and the developer passes under the member; A developing device comprising: a scraping member that is sometimes pushed toward the magnetic roller by the developer and assumes a second position in contact with the magnetic roller so as to scrape off the developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49059920A JPS5810748B2 (en) | 1974-05-28 | 1974-05-28 | Genzo Sochi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49059920A JPS5810748B2 (en) | 1974-05-28 | 1974-05-28 | Genzo Sochi |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50151530A JPS50151530A (en) | 1975-12-05 |
| JPS5810748B2 true JPS5810748B2 (en) | 1983-02-26 |
Family
ID=13127041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49059920A Expired JPS5810748B2 (en) | 1974-05-28 | 1974-05-28 | Genzo Sochi |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810748B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555371A (en) * | 1978-10-20 | 1980-04-23 | Ricoh Co Ltd | Magnetic brush developing unit |
| JPS5555372A (en) * | 1978-10-20 | 1980-04-23 | Ricoh Co Ltd | Magnetic brush developing unit |
| JPS55110274A (en) * | 1979-02-15 | 1980-08-25 | Canon Inc | Developing device |
| JPS6067978A (en) * | 1983-09-22 | 1985-04-18 | Ricoh Co Ltd | Developing device |
| JPS63264781A (en) * | 1987-08-13 | 1988-11-01 | Ricoh Co Ltd | Dry developing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4818213U (en) * | 1971-07-13 | 1973-03-01 |
-
1974
- 1974-05-28 JP JP49059920A patent/JPS5810748B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4818213U (en) * | 1971-07-13 | 1973-03-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50151530A (en) | 1975-12-05 |
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