JPH0321906B2 - - Google Patents
Info
- Publication number
- JPH0321906B2 JPH0321906B2 JP55012427A JP1242780A JPH0321906B2 JP H0321906 B2 JPH0321906 B2 JP H0321906B2 JP 55012427 A JP55012427 A JP 55012427A JP 1242780 A JP1242780 A JP 1242780A JP H0321906 B2 JPH0321906 B2 JP H0321906B2
- Authority
- JP
- Japan
- Prior art keywords
- developing
- toner
- roller
- developer
- latent image
- 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
Links
- 108091008695 photoreceptors Proteins 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- CXOFVDLJLONNDW-UHFFFAOYSA-N Phenytoin Chemical group N1C(=O)NC(=O)C1(C=1C=CC=CC=1)C1=CC=CC=C1 CXOFVDLJLONNDW-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- G03G15/065—Arrangements for controlling the potential of the developing electrode
Description
【発明の詳細な説明】
この発明は複写機等において、キヤリアレスト
ナーにより、静電潜像あるいは磁気潜像を現像す
る新規な現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel developing device for developing an electrostatic latent image or a magnetic latent image using a carrier toner in a copying machine or the like.
近年複写機等においては現像剤の長寿命化及び
メンテナンスの簡素化等を図るため、キヤリアレ
ストナーを使用する現像装置の開発が進められて
いる。そしてこのキヤリアレストナーを用いて現
像する現像装置は、従来の磁性鉄粉等からなるキ
ヤリアを有する現像剤の場合と異なり、現像装置
内で連接される複数の導電性のフアーブラシ状の
ローラを用いて摩擦帯電し、トナーに電荷を付与
しながらトナーを均一に搬送し現像するというよ
うなものが用いられている。しかしながらこのよ
うな装置にあつては摩擦帯電されたトナーが、現
像部で現像ローラ側に静電的に付着されてしま
い、有機感光体や酸化亜鉛等の高電位に帯電出来
ない耐圧の小さい感光体等にあつては、特にトナ
ーが潜像に付着されにくく、現像効率が低下さ
れ、ひいては画像濃度が低下し複写画質が低下す
るという問題を有している。 2. Description of the Related Art In recent years, developing devices using carrier toner have been developed in copying machines and the like in order to extend the life of the developer and simplify maintenance. A developing device that uses this carrier-less toner for development uses a plurality of conductive fur brush-like rollers that are connected in the developing device, unlike conventional developers that have a carrier made of magnetic iron powder. The toner is triboelectrically charged, and the toner is uniformly conveyed and developed while imparting an electric charge to the toner. However, in such devices, the triboelectrically charged toner is electrostatically adhered to the developing roller side in the developing section, and organic photoreceptors or photoreceptors with low withstand voltages that cannot be charged to a high potential, such as zinc oxide, are In the case of printed materials, there is a problem in that the toner is particularly difficult to adhere to the latent image, and the developing efficiency is reduced, resulting in a reduction in image density and a deterioration in the quality of copied images.
この発明は上記事情にもとづいてなされたもの
で、耐圧の小さい感光体にあつても現像時キヤリ
アレストナーが現像ローラ側に付着されることな
く容易に潜像側に付着され、現像効率が高く、良
質の複写画像を得る事が出来る現像装置を提供す
る事を目的とする。 This invention was made based on the above-mentioned circumstances, and even if the photoreceptor has a low pressure resistance, the carrier toner is easily attached to the latent image side during development without being attached to the developing roller side, and the developing efficiency is high. The object of the present invention is to provide a developing device that can obtain high-quality copied images.
以下この発明の一実施例を第１図を参照しなが
ら説明する。現像装置１０の筐体１１開口部１１
ａは負極性の静電潜像（図示せず）が形成される
潜像保持面であるところの酸化亜鉛からなる感光
体ドラム１２と対向している。又、筐体１１内に
は、一部が開口部１１ａから突出され、感光体ド
ラム１２と摺接する現像部材である現像ローラ１
３、及び現像剤搬送部材を構成する第１の搬送ロ
ーラ１５並びに、第１の搬送ローラ１５と現像ロ
ーラ１３とに連接する第２の搬送ローラ１６が設
けられている。そして現像ローラ１３及び、第１
の搬送ローラ１５並びに第２の搬送ローラ１６
は、共にアルミニウムからなる導電性シヤフト１
７ａと、この導電性シヤフト１７ａに取着される
導電性弾性部材であり、周囲に太さ約1.5［デニ
ル］、長さ約0.5［mm］のレーヨン繊維１７ｂがブ
ラシ状に静電植毛された水溶性ブチラール60％、
グリセリン10％、カーボン７％の溶液に含浸さ
れ、約10［Ω・cm］の抵抗を有する導電性の発泡
ウレタンローラ１７とからなつている。更に１８
は電圧印加源を構成する約150［Ｖ］の直流電源で
あり、第１の搬送ローラ１５、第２の搬送ローラ
１６、及び現像ローラ１３各間に電位勾配を付与
している。そして現像ローラ１３には直流電源１
８と共に電圧印加源を構成する交流電源２０が接
続され約200〔Ｖ〕，200〔Hz〕の交流電圧が印加さ
れている。又２１は筐体の上方に設けられるトナ
ー供給部であり、トナー収納部２２内の正極性に
摩擦帯電される非磁性キヤリアレスのトナー２３
を筐体１１内に供給している。更に２４は帯電装
置、２６は露光装置である。 An embodiment of the present invention will be described below with reference to FIG. Housing 11 opening 11 of developing device 10
A is opposed to a photoreceptor drum 12 made of zinc oxide, which is a latent image holding surface on which a negative electrostatic latent image (not shown) is formed. Also, inside the housing 11 is a developing roller 1, which is a developing member that partially protrudes from the opening 11a and comes into sliding contact with the photosensitive drum 12.
3, a first conveying roller 15 constituting a developer conveying member, and a second conveying roller 16 connected to the first conveying roller 15 and the developing roller 13. The developing roller 13 and the first
transport roller 15 and second transport roller 16
are both conductive shafts 1 made of aluminum.
7a, and a conductive elastic member attached to the conductive shaft 17a, around which rayon fibers 17b having a thickness of about 1.5 [denyl] and a length of about 0.5 [mm] are electrostatically flocked in a brush shape. 60% water-soluble butyral,
It consists of a conductive urethane foam roller 17 impregnated with a solution of 10% glycerin and 7% carbon and having a resistance of about 10 [Ω·cm]. 18 more
is a DC power supply of about 150 [V] constituting a voltage application source, and applies a potential gradient between the first conveyance roller 15, the second conveyance roller 16, and the developing roller 13. The developing roller 13 is provided with a DC power source 1.
An alternating current power supply 20, which constitutes a voltage application source, is connected to the AC power supply 8, and an alternating current voltage of about 200 [V] and 200 [Hz] is applied. Reference numeral 21 denotes a toner supply section provided above the housing, in which a non-magnetic carrierless toner 23 that is frictionally charged to a positive polarity is stored in the toner storage section 22.
is supplied into the housing 11. Furthermore, 24 is a charging device, and 26 is an exposure device.
次に作用について述べる。複写開始により感光
体ドラム１２は矢印ｔ方向に回転され、帯電装置
２４、及び露光装置２６を経て負極性の静電潜像
（図示せず）が形成された状態で、現像装置１０
に達する。一方現像装置１０の第１の搬送ローラ
１５及び第２の搬送ローラ１６並びに現像ローラ
１３は相互に摺接し摩擦を生じながら矢印ｕ方向
に回転されると共に、第２の搬送ローラ１６には
直流電源１８により約150〔Ｖ〕の電圧が印加さ
れ、現像ローラ１３には直流電源１８により約
150〔Ｖ〕と交流電源２０により約200〔Ｖ〕の電圧
が畳重して印加される。そして第１の搬送ローラ
１５によりトナー供給部２１から第２の搬送ロー
ラ１６に達したトナー２３は摩擦帯電されつつ電
位の高い第２の搬送ローラ１６に付着され、次い
で現像ローラ１３に達した。更に第２の搬送ロー
ラ１６及び現像ローラ１３との摺接部においても
トナー２３は摩擦帯電されつつより電位の高い現
像ローラ１３側に付着される。この後トナー２３
は感光体ドラム１２に達し現像を行なうが、現像
ローラ１３にあつてはトナー２３は、交流電源２
０による電圧印加により電位的に振動を受けてい
る事から、摩擦帯電が助長されると共に現像ロー
ラ１３から離間され易くなつており、静電潜像側
に容易に付着される。 Next, we will discuss the effect. Upon the start of copying, the photoreceptor drum 12 is rotated in the direction of arrow t, and a negative electrostatic latent image (not shown) is formed through the charging device 24 and the exposure device 26, and then the developing device 10
reach. On the other hand, the first conveying roller 15, the second conveying roller 16, and the developing roller 13 of the developing device 10 are rotated in the direction of the arrow U while slidingly contacting each other and generating friction. A voltage of approximately 150 [V] is applied to the developing roller 13 by the DC power supply 18.
A voltage of 150 [V] and a voltage of about 200 [V] are applied by the AC power supply 20 in a superimposed manner. The toner 23 that has reached the second conveyance roller 16 from the toner supply section 21 by the first conveyance roller 15 is frictionally charged and adheres to the second conveyance roller 16 having a high potential, and then reaches the developing roller 13 . Further, at the sliding contact portion between the second transport roller 16 and the developing roller 13, the toner 23 is also frictionally charged and adheres to the side of the developing roller 13 having a higher potential. After this, toner 23
The toner 23 reaches the photoreceptor drum 12 for development, but the toner 23 on the developing roller 13 is
Since it is subjected to potential vibration due to the voltage application of 0, frictional charging is promoted and it becomes easy to be separated from the developing roller 13, and is easily attached to the electrostatic latent image side.
このように構成すれば、現像時現像ローラ１３
上においてトナー２３は摩擦帯電による電荷量が
増大され又振動により離間し易くなつている事か
ら、現像ローラ１３側に付着される事無く、容易
に潜像側に付着されるので、現像効率が高く、良
質の複写画像を得る事が出来る。 With this configuration, the developing roller 13 during development
In the above, the toner 23 has an increased amount of charge due to frictional electrification and is easily separated by vibration, so it is easily attached to the latent image side without being attached to the developing roller 13 side, so that the developing efficiency is improved. A high quality copy image can be obtained.
尚この発明は上記実施例に限定されず種々設計
変更可能であり、例えばトナー搬送ローラの数は
トナーの帯電状態や分布状態に応じて増減可能で
あり、現像ローラもフアーブラシ状であつてトナ
ー搬送ローラ及び現像ローラ間での摩擦帯電が充
分であればトナー搬送ローラは１つであつても良
いし、その材質や大きさも限定されず、抵抗値も
103〜1011〔Ω・cm〕程度であれば良い。又現像ロ
ーラの形状も複数のトナー搬送ローラにより搬送
される間にトナーが充分摩擦帯電されていれば、
フアーブラシ状で無く滑面状であつても良い。尚
トナーの帯電極性も感光体ドラムに形成される静
電潜像の極性に応じて任意である。又、直流電源
はトナー搬送を促進するため設けられているがト
ナー搬送ローラのみで搬送可能であれば使用しな
くても良いし、使用する場合にも第２図に示すよ
うに、現像ローラ１３にのみ直流電源１８を接続
しても、各ローラ１３，１５，１６がそれぞれ約
104〔Ω・cm〕の抵抗を有しており、各ローラ１
３，１５，１６における電位降下により各ローラ
１３，１５，１６間に必要な電位勾配が形成され
る事から、トナーの搬送促進が可能とされる。又
交流電源の波形等も任意であり大きさは200〜
1000〔Ｖ〕程度であれば良く、周波数もトナーの
振動が複写画像に濃淡となつて現われない程度の
大きさであれば良い。更にこの装置により現像さ
れる潜像は静電潜像に限定されず、磁性トナーを
用いれば磁気テープあるいは磁気メタルドラム等
の磁性材料からなるベース上に形成される磁気潜
像の現像にも適する。 Note that the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways. For example, the number of toner transport rollers can be increased or decreased depending on the charging state and distribution state of toner, and the developing roller is also fur-brush-shaped to transport the toner. As long as the frictional electrification between the roller and the developing roller is sufficient, there may be only one toner transport roller, and there are no limitations on its material or size, and the resistance value can also be changed.
It is sufficient if it is about 10 3 to 10 11 [Ω・cm]. Also, the shape of the developing roller is such that if the toner is sufficiently triboelectrically charged while being conveyed by multiple toner conveying rollers,
It may have a smooth surface instead of a fur brush shape. The charging polarity of the toner is also arbitrary depending on the polarity of the electrostatic latent image formed on the photoreceptor drum. Further, although the DC power supply is provided to promote toner transport, it may not be necessary if the toner can be transported only by the toner transport roller, and even if it is used, as shown in FIG. Even if the DC power supply 18 is connected only to the
It has a resistance of 10 4 [Ω・cm], and each roller 1
A necessary potential gradient is formed between each roller 13, 15, and 16 due to the potential drop at rollers 3, 15, and 16, so that it is possible to accelerate the conveyance of toner. Also, the waveform of the AC power supply is arbitrary, and the size is 200~
It is sufficient that the voltage is about 1000 [V], and the frequency is sufficient as long as the vibration of the toner does not appear as shading in the copied image. Further, the latent image developed by this device is not limited to an electrostatic latent image, and if magnetic toner is used, it is also suitable for developing a magnetic latent image formed on a base made of magnetic material such as a magnetic tape or a magnetic metal drum. .
以上説明したようにこの発明によれば、現像ロ
ーラに交流電圧を印加してキヤリアレスのトナー
を振動させる事により、トナーの摩擦帯電を促進
し、現像ローラからの離間を促進するので、現像
時トナーが現像ローラ側に静電的に付着されてし
まう事無く潜像側に容易に付着されるので現像効
率が高く、特に耐圧の小さい感光体等に形成され
る低電位の潜像も容易に現像され、鮮明な複写画
像を得る事が出来る。更に実施例に示したように
トナー搬送ローラ及び現像ローラ間に電位勾配を
設ければトナーの搬送が促進されるので現像効率
がさらに良くなり、よりすぐれた現像特性を得る
事が出来る。 As explained above, according to the present invention, by applying an AC voltage to the developing roller and vibrating the carrierless toner, frictional charging of the toner is promoted and separation from the developing roller is promoted. Because it is easily attached to the latent image side without electrostatically adhering to the developing roller side, the developing efficiency is high, and in particular, low potential latent images formed on photoreceptors with low pressure resistance can be easily developed. It is possible to obtain a clear copy image. Further, as shown in the embodiments, if a potential gradient is provided between the toner transport roller and the developing roller, toner transport is promoted, thereby further improving development efficiency and providing better development characteristics.
第１図はこの発明の一実施例を示す横断面図、
第２図はこの発明の他の変形例を示す横断面図で
ある。
１０……現像装置、１１……筐体、１２……感
光体ドラム、１３……現像ローラ、１５……第１
の搬送ローラ、１６……第２の搬送ローラ、１７
……発泡ウレタンローラ、１８……直流電源、２
０……交流電源、２３……トナー。
FIG. 1 is a cross-sectional view showing an embodiment of the present invention;
FIG. 2 is a cross-sectional view showing another modification of the invention. 10...Developing device, 11...Housing, 12...Photosensitive drum, 13...Developing roller, 15...First
Conveyance roller, 16...Second conveyance roller, 17
...Urethane foam roller, 18...DC power supply, 2
0...AC power supply, 23...toner.
Claims (1)
面へ現像剤を供給しかつ現像を行うために回動す
る現像部材と、この現像部材との間で摩擦を生じ
るように回動し、かつ表面が導電性弾性部材で形
成された現像剤搬送部材と、前記両部材間に電位
勾配を与えることによつて、前記両部材間の回動
により生じた摩擦により摩擦帯電された現像剤を
前記現像剤搬送部材から前記現像部材に移送を行
わせる電圧印加源を具備したことを特徴とする現
像装置。 ２ 現像剤搬送部材は、第１の搬送ローラと第２
の搬送ローラとを具備し、これら第１、第２の搬
送ローラ間の回動摩擦により現像剤を摩擦帯電さ
せることを特徴とする特許請求の範囲第１項記載
の現像装置。 ３ 電圧印加源は、現像部材と潜像保持面との間
に交流電圧を印加する交流電源を具備したことを
特徴とする特許請求の範囲第１項記載の現像装
置。[Scope of Claims] 1. A developing member that is provided opposite to the latent image holding surface and rotates to supply developer to the latent image holding surface and perform development, and this developing member By applying a potential gradient between a developer conveying member whose surface is made of a conductive elastic member, and the friction generated by the rotation between the two members, A developing device comprising: a voltage application source for transferring frictionally charged developer from the developer transporting member to the developing member. 2 The developer conveyance member includes a first conveyance roller and a second conveyance roller.
2. The developing device according to claim 1, further comprising: a conveying roller, and the developer is frictionally charged by rotational friction between the first and second conveying rollers. 3. The developing device according to claim 1, wherein the voltage application source includes an AC power source that applies an AC voltage between the developing member and the latent image holding surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1242780A JPS56110964A (en) | 1980-02-06 | 1980-02-06 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1242780A JPS56110964A (en) | 1980-02-06 | 1980-02-06 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56110964A JPS56110964A (en) | 1981-09-02 |
| JPH0321906B2 true JPH0321906B2 (en) | 1991-03-25 |
Family
ID=11804977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1242780A Granted JPS56110964A (en) | 1980-02-06 | 1980-02-06 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56110964A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5919965A (en) * | 1982-07-27 | 1984-02-01 | Konishiroku Photo Ind Co Ltd | Developing device |
| JP2013246386A (en) * | 2012-05-29 | 2013-12-09 | Brother Ind Ltd | Developing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1458766A (en) * | 1973-02-15 | 1976-12-15 | Xerox Corp | Xerographic developing apparatus |
| JPS54115245A (en) * | 1978-02-28 | 1979-09-07 | Ricoh Co Ltd | Developing device of electrostatic latent images |
-
1980
- 1980-02-06 JP JP1242780A patent/JPS56110964A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1458766A (en) * | 1973-02-15 | 1976-12-15 | Xerox Corp | Xerographic developing apparatus |
| JPS54115245A (en) * | 1978-02-28 | 1979-09-07 | Ricoh Co Ltd | Developing device of electrostatic latent images |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56110964A (en) | 1981-09-02 |
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| JPS5911105B2 (en) | Seiden Zou Nojiki Brush Gen Zouhou | |
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| JPH0328710B2 (en) | ||
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| JPS6215875B2 (en) | ||
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