JPS61170761A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS61170761A JPS61170761A JP60011334A JP1133485A JPS61170761A JP S61170761 A JPS61170761 A JP S61170761A JP 60011334 A JP60011334 A JP 60011334A JP 1133485 A JP1133485 A JP 1133485A JP S61170761 A JPS61170761 A JP S61170761A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- developing
- pole part
- magnetic
- developing roller
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はたとえば多色電子複写機として用いられる画像
形成装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus used, for example, as a multicolor electronic copying machine.
最近、電子複写機のカラー化が進められてお９、その技
術の進歩はめざましいが、この電子複写機に備えられる
現像装置としてはたとえば、第５図に示すようなものが
知られている。すなわち、図中１は像担持体としての感
光ドラム１４に近接対向して設けられた第１の現像器で
、この第１の現像器１には赤色コピー用の現像剤２が収
容されている。また、３は上記感光ドラム１４に対向す
るとともに上記第１の現像器１の下部側に隣接する第２
の現像器で、この第２の現像器３内には黒コピー用の現
像剤４が収容されている。Recently, the use of color electronic copying machines has been progressing,9 and the technology has made remarkable progress. For example, a developing device as shown in FIG. 5 is known as a developing device installed in this electronic copying machine. That is, in the figure, reference numeral 1 denotes a first developing device that is provided close to and opposite to a photosensitive drum 14 as an image carrier, and this first developing device 1 stores a developer 2 for red copying. . Further, reference numeral 3 denotes a second developing device facing the photosensitive drum 14 and adjacent to the lower side of the first developing device 1.
This second developing device 3 contains a developer 4 for black copying.
また、上記第１の現像器１内には第１の現像体としての
第１の現像ロー２５が設けられ、この第１の現像ローラ
５は磁気ロール６と、これを外嵌する回転スリーブ７と
によって構成されている。上記磁気ロール６は第１〜第
５の磁極部８ａ〜８ｅを有し、第１．第３１第４の磁極
部８ａ、８ｃ、８ｄａＮ極、第２．第５の磁極部８ｂ、
ＢｅはＳ極となりている。Further, a first developing roller 25 as a first developing body is provided in the first developing device 1, and this first developing roller 5 includes a magnetic roll 6 and a rotating sleeve 7 that fits around the magnetic roll 6. It is composed of. The magnetic roll 6 has first to fifth magnetic pole parts 8a to 8e, and has first to fifth magnetic pole parts 8a to 8e. 31st fourth magnetic pole portions 8a, 8c, 8daN pole, 2nd . a fifth magnetic pole part 8b,
Be is the south pole.
また、上記第２の現像器３内には第２の現像体としての
第２の現像ローラ１０が設けられ、この第２の現像ロー
ラ１０も磁気ロールＩＩと、これを外嵌する回転スリー
ブ１２とによって構成されている。上記磁気ロール１１
は第１乃至第６の磁極部１３工〜１３ｆを有し、第１．
第３、第５の磁極部１３ｍ、１３ｃ、１３ｅはＳ極、第
２．第４．第６の磁極部１３ｂ、１３ｄ。Further, a second developing roller 10 as a second developing body is provided in the second developing device 3, and this second developing roller 10 also includes a magnetic roll II and a rotating sleeve 12 that fits around the magnetic roll II. It is composed of. The magnetic roll 11
has first to sixth magnetic pole parts 13 to 13f;
The third and fifth magnetic pole parts 13m, 13c, and 13e are S poles, and the second... 4th. Sixth magnetic pole portions 13b, 13d.
１３１はＮ極となりている・
上記第１の現像ロー２５の回転スリーブ７は時計方向に
回転し、上記第２の現像ローラ１，００回転スリーブ１
２は反時計方向に回転するようになっている。131 is the N pole. The rotating sleeve 7 of the first developing roller 25 rotates clockwise, and the rotating sleeve 1 of the second developing roller 1,00 rotates clockwise.
2 is designed to rotate counterclockwise.
しかして、たとえば、第１の現像器１を使用して赤色の
コピーをとる場合には、磁気ロール５０回転スリープ７
が回転されて赤色現像剤３が搬送されその磁気ブラシが
感光ドラム１４上の静電潜像に摺接して赤色コピーが得
られる。For example, when making a red copy using the first developer 1, the magnetic roll 50 rotates and the sleep 7
is rotated, the red developer 3 is conveyed, and its magnetic brush comes into sliding contact with the electrostatic latent image on the photosensitive drum 14 to obtain a red copy.
また、第２の現像器３を使用して黒色のコピー１−とる
場合には、磁気ロールｌＯの回転スリーブ１２が反時計
方向に回転されて黒色の現像剤４が搬送されその磁気ブ
ックが感光ドラム１４上の静電潜像に摺接して黒色のコ
ピーが得られる。Further, when making a black copy 1- using the second developing device 3, the rotating sleeve 12 of the magnetic roll 1O is rotated counterclockwise to convey the black developer 4 and the magnetic book to be exposed to light. A black copy is obtained by slidingly contacting the electrostatic latent image on the drum 14.
しかしながら、従来くおいては、第１の現像ロー２６の
第１の磁極部（Ｓ極）８ｍと第２の現像ローラ１０の第
１の磁極部（Ｎ極）１３ｍとの間に磁力が生じ、その影
響を受けて現像剤２．４の搬送が不良になシ、画像不良
を生じたシ、現像剤が落下するとい−）九不都合がめっ
た。However, conventionally, a magnetic force is generated between the first magnetic pole part (S pole) 8m of the first developing roller 26 and the first magnetic pole part (N pole) 13m of the second developing roller 10. Under the influence of this, the developer 2.4 was not conveyed properly, resulting in defective images and the developer falling.
〔発明の目的〕 １
本発明は上記事情に着目してなされたもので、その目的
とするところは、第１の現像体の磁極部と第２の現像体
の磁極部との間に磁力を発生させないようにした画像形
成装置を提供しようとするものである。[Object of the invention] 1
The present invention has been made in view of the above-mentioned circumstances, and its object is to create an image in which no magnetic force is generated between the magnetic pole portion of the first developing body and the magnetic pole portion of the second developing body. The present invention aims to provide a forming device.
本発明は上記目的を達成するため、偉担持体に反磁性体
を設け、この反磁性体によシ第１の現像体の磁極部とｆ
Ａ２の現像体の磁極部との間に生じる磁力を遮断するも
のである。In order to achieve the above-mentioned object, the present invention provides a diamagnetic material on a large carrier, and uses this diamagnetic material to connect the magnetic pole part of the first developing body with f.
This is to block the magnetic force generated between the magnetic pole part of the A2 developer and the magnetic pole part.
以下、本発明を第１図乃至第３図に示す一実施例を参照
して説明する。なお、第５図で示した部分と同一部分に
ついては同一番号を付してその説明を省略する。感光ド
ラム１４の内部にはその内周全面に対向する反磁性体と
しての円筒状の黄銅２１が設けられている。この黄銅２
１の範囲１部は前記第１の現像器１の第１の現像ローラ
５の第１の磁極部（Ｎ極）８ａと前記第２の現像器３の
第２の現像ロー２１０の第１の磁極部（Ｓ極）１３ａと
の間に位置されている。この黄銅（反磁性体）は第３図
に示すように、磁石２２の８極と磁石２３のＮ極との間
におかれると、磁石２２．２３間に生じる磁力をカット
する特性を有するものである。The present invention will be described below with reference to an embodiment shown in FIGS. 1 to 3. Note that the same parts as those shown in FIG. 5 are given the same numbers, and the explanation thereof will be omitted. Inside the photosensitive drum 14, a cylindrical brass 21 as a diamagnetic material is provided facing the entire inner circumference thereof. This brass 2
Part 1 of the range 1 corresponds to the first magnetic pole portion (N pole) 8a of the first developing roller 5 of the first developing device 1 and the first magnetic pole portion (N pole) 8a of the second developing roller 210 of the second developing device 3. It is located between the magnetic pole part (S pole) 13a. As shown in Figure 3, this brass (diamagnetic material) has the property of cutting the magnetic force generated between the magnets 22 and 23 when placed between the 8 poles of the magnet 22 and the N pole of the magnet 23. It is.
しかして、上述した構成によれば、第１の現像ローラ５
の第１の磁極部（Ｎ極）と第２の現像ローラ１０の第１
の磁極部（Ｓ極）との間に生じようとする磁力は黄銅２
１１１Ｃよシカ、トされ、第１および第２の現像ロー９
５．１０のそれぞれの磁極部８Ｈ〜１１ ｅ、 １３
ａＮｌ Ｓ ｆ間でのみ磁力が生じ、現像剤２．４は
良好に搬送供給されることになる。According to the above-described configuration, the first developing roller 5
The first magnetic pole part (N pole) of the second developing roller 10 and the first magnetic pole part (N pole) of the second developing roller 10
The magnetic force that is about to occur between the magnetic pole part (S pole) of brass 2
111C, first and second developing row 9
5.10 respective magnetic pole parts 8H to 11e, 13
A magnetic force is generated only between aNl S f, and the developer 2.4 is transported and supplied satisfactorily.
なお、上記一実施例においては感光ドラム１４の内部に
その内周全面に沿って黄銅２１を設けたが、これに限ら
れることなく、第４図に示すように感光ドラム１４の内
周一部のみに第１の現像ロー２５の第１の磁極部８ａと
第２の現像ロー２１０の第１の磁極部１３鳳との間に位
置した状態で黄銅３１ｔ−固定的に設けても同様な作用
効果を奏する。In the above embodiment, the brass 21 is provided inside the photosensitive drum 14 along the entire inner periphery, but the brass 21 is not limited to this, and as shown in FIG. The same effect can be obtained even if the brass 31t is fixedly provided between the first magnetic pole part 8a of the first developing row 25 and the first magnetic pole part 13 of the second developing row 210. play.
なお、第４図中３２は駆動モータで、この駆動モータ３
２によシ第１および第２のギヤ３３゜３４を介して感光
ドラム１４が回転駆動されるようになっている。In addition, 32 in FIG. 4 is a drive motor, and this drive motor 3
2, the photosensitive drum 14 is rotationally driven via first and second gears 33 and 34.
その他、本発明はその要旨の範囲内で種々変形実施可能
なことは勿論である。In addition, it goes without saying that the present invention can be modified in various ways within the scope of its gist.
本発明は以上説明したように、像担持体の内部に反磁性
体を設け、この反磁性体により第１の現像体の磁極部と
第２の現像体の磁極部との間に生じる磁力を遮断するか
ら、第１および第２の現像体はそれぞれ良好に現像剤を
搬送でき、高品質の多色画像を得ることができるという
効果を奏するものである。As explained above, the present invention provides a diamagnetic material inside the image carrier, and this diamagnetic material reduces the magnetic force generated between the magnetic pole part of the first developing body and the magnetic pole part of the second developing body. Since the first and second developing bodies are blocked, each of the first and second developing bodies can transport the developer well, and a high-quality multicolor image can be obtained.
第１図乃至第３図は本発明の一実施例を示すもので、第
１図は感光体および現像装置を示す概略的構成図、第２
図はその斜視図、第３図は１４・・・像担持体（感光ド
ラム）、５・・・第１の現康体（第１の現像ローラ）、
１０・・・第２の現像体（第２の現像ローラ）、２．ｔ
・・・現像剤、８３〜８ｅ・・・磁極部、１３ａ〜１３
ｆ・・・磁極部、２１．３１・・・反磁性体（黄銅）。
出願人代理人 弁理士 鈴 江 武 彦第１図
第２図1 to 3 show one embodiment of the present invention, in which FIG. 1 is a schematic configuration diagram showing a photoreceptor and a developing device, and FIG.
The figure is a perspective view, and FIG. 3 shows 14...image carrier (photosensitive drum), 5...first developing body (first developing roller),
10... second developing body (second developing roller), 2. t
...Developer, 83-8e...Magnetic pole part, 13a-13
f...Magnetic pole part, 21.31...Diamagnetic material (brass). Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2
Claims (4)
接した状態に配設し、前記第１および第２の現像体は現
像剤を前記像担持体に搬送供給する複数の磁極部を有し
てなるものにおいて、前記像担持体に前記第１の現像体
の磁極部と第２の現像体の磁極部との間に生じる磁力を
遮断する反磁性体を設けたことを特徴とする画像形成装
置。(1) A first and a second developer are disposed adjacent to each other facing the image carrier, and the first and second developer are arranged in a plurality of blocks that transport and supply developer to the image carrier. In the image carrier having a magnetic pole part, the image carrier is provided with a diamagnetic material that blocks the magnetic force generated between the magnetic pole part of the first developing member and the magnetic pole part of the second developing member. Features of the image forming device.
を特徴とする特許請求の範囲第１項記載の画像形成装置
。(2) The image forming apparatus according to claim 1, wherein the diamagnetic material is provided on the entire interior surface of the image carrier.
を特徴とする特許請求の範囲第１項記載の画像形成装置
。(3) The image forming apparatus according to claim 1, wherein the diamagnetic material is provided on a part of the inner surface of the image carrier.
の範囲第１項、第２項または第３項記載の画像形成装置
。(4) The image forming apparatus according to claim 1, 2 or 3, wherein the diamagnetic material is brass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60011334A JPS61170761A (en) | 1985-01-24 | 1985-01-24 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60011334A JPS61170761A (en) | 1985-01-24 | 1985-01-24 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61170761A true JPS61170761A (en) | 1986-08-01 |
Family
ID=11775132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60011334A Pending JPS61170761A (en) | 1985-01-24 | 1985-01-24 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61170761A (en) |
-
1985
- 1985-01-24 JP JP60011334A patent/JPS61170761A/en active Pending
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