JPS6343750B2 - - Google Patents
Info
- Publication number
- JPS6343750B2 JPS6343750B2 JP61311508A JP31150886A JPS6343750B2 JP S6343750 B2 JPS6343750 B2 JP S6343750B2 JP 61311508 A JP61311508 A JP 61311508A JP 31150886 A JP31150886 A JP 31150886A JP S6343750 B2 JPS6343750 B2 JP S6343750B2
- Authority
- JP
- Japan
- Prior art keywords
- charged
- contact
- photoreceptor
- polarity
- voltage
- 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
- 238000004140 cleaning Methods 0.000 claims description 4
- 108091008695 photoreceptors Proteins 0.000 description 22
- 230000000694 effects Effects 0.000 description 4
- 210000004899 c-terminal region Anatomy 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- IKOKHHBZFDFMJW-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-(2-morpholin-4-ylethoxy)pyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OCCN1CCOCC1 IKOKHHBZFDFMJW-UHFFFAOYSA-N 0.000 description 1
- IICCLYANAQEHCI-UHFFFAOYSA-N 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound O1C(=O)C(C(=C(Cl)C(Cl)=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 IICCLYANAQEHCI-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229930187593 rose bengal Natural products 0.000 description 1
- 229940081623 rose bengal Drugs 0.000 description 1
- STRXNPAVPKGJQR-UHFFFAOYSA-N rose bengal A Natural products O1C(=O)C(C(=CC=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 STRXNPAVPKGJQR-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明はたとえば電子複写機の感光体等を帯電
する接触式の帯電装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a contact-type charging device for charging a photoreceptor, etc. of an electronic copying machine, for example.
（従来の技術）
近年、たとえば電子複写機の感光体等を帯電す
る接触式の帯電装置が開発されており、この装置
では、感光体に接触子を接触させながら上記接触
子に感光体の帯電極性と同極性の直流電圧を印加
することにより上記感光体を帯電するようになつ
ている。(Prior Art) In recent years, a contact-type charging device has been developed that charges a photoreceptor, etc. of an electronic copying machine, for example. In this device, while a contact is brought into contact with the photoreceptor, the contactor charges the photoreceptor. The photoreceptor is charged by applying a DC voltage of the same polarity as the photoreceptor.
（発明が解決しようとする問題点）
しかしながら、この帯電装置においては、接触
子の電位が常に感光体と同極性かつ感光体の表面
電位より高いため、感光体の表面に感光体の表面
電位と逆極性に帯電して残留付着している現像剤
が接触子に付着して帯電むら等を生じる虞れがあ
り、このため接触子を定期的にクリーニングする
必要がある。(Problems to be Solved by the Invention) However, in this charging device, the potential of the contact is always the same polarity as the photoconductor and higher than the surface potential of the photoconductor, so the surface potential of the photoconductor is higher than the surface potential of the photoconductor. There is a possibility that residual developer charged to the opposite polarity may adhere to the contact and cause uneven charging, etc. Therefore, it is necessary to periodically clean the contact.
本発明は上記事情にもとづいてなされたもの
で、その目的とするところは、定期的クリーニン
グを行なうことなく帯電むら等の発生を防止する
ことにある。 The present invention has been made based on the above-mentioned circumstances, and its purpose is to prevent the occurrence of uneven charging without performing periodic cleaning.
［発明の構成］
（問題点を解決するための手段）
本発明は、上記問題点を解決するために、被帯
電体に接触子を接触させながら上記接触子に電圧
を印加することにより上記被帯電体を帯電するよ
うにした帯電装置において、帯電時には上記接触
子に少なくとも上記被帯電体の帯電極性と同極性
の直流成分を含む電圧を印加して上記被帯電体を
帯電し、非帯電時には上記接触子に少なくとも上
記被帯電体の帯電極性と逆極性の直流成分を含む
電圧を印加して上記接触子をクリーニングする電
圧印加手段を具備したことを特徴とするものであ
る。[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention applies a voltage to the contact while bringing the contact into contact with the charged object. In a charging device configured to charge a charged object, the charged object is charged by applying a voltage containing at least a DC component of the same polarity as the charging polarity of the charged object to the contact when charging, and when not charged. The present invention is characterized by comprising a voltage applying means for applying to the contactor a voltage containing at least a DC component having a polarity opposite to the charging polarity of the charged object to clean the contactor.
（作用）
被帯電体に静電的に付着している現像剤等の付
着物が帯電時に電位が被帯電体と同極性かつ被帯
電体よりも高い接触子に付着するが、非帯電時に
接触子を被帯電体と逆極性にし、これにより接触
子から付着物を離反させる。(Function) When the object to be charged is electrostatically attached, such as developer, adheres to the contact whose potential is the same polarity as the object to be charged and higher than that of the object to be charged. The contact is made to have a polarity opposite to that of the object to be charged, thereby separating the deposits from the contact.
（実施例）
以下、本発明の一実施例を図命を参照しながら
説明する。第１図中１はたとえば電子複写機等に
用いられる被帯電体としての感光体である。この
感光体１は感光体ドラム２の外周にローズベンガ
ルの如き色素によつて増感された酸化亜鉛−樹脂
分散剤のバインダータイプのかつたとえば負の帯
電極性を有する感光体層３を塗布して形成されて
いて、この周囲部には接触式の帯電装置４が配設
されている。(Example) Hereinafter, an example of the present invention will be described with reference to illustrations. Reference numeral 1 in FIG. 1 denotes a photoreceptor as a charged member used in, for example, an electronic copying machine. This photoreceptor 1 has a photoreceptor layer 3 coated on the outer periphery of a photoreceptor drum 2, which is a binder type of zinc oxide-resin dispersant sensitized with a dye such as rose bengal and has, for example, negative charge polarity. A contact type charging device 4 is disposed around this portion.
この帯電装置４は次のように構成されている。
すなわち、５は所定の電気抵抗たとえば106〜109
Ω・cmを有する厚さ0.5〜５mmの導電性物質から
なり、上記感光体１の表面に沿つて配設される円
弧状の電極であり、この電極５の表面すなわち感
光体１表面に対向する側には接触子６が設けられ
ている。この接触子６は上記電極５と同一物質で
形成された接着剤によつて電極５上に植毛されか
つカーボンを混入した直毛繊維（REC−Ｂ商品
名）からなり、太さ１〜10デニール、長さ0.1〜
５mm、植毛密度50〜70本／mm2で、上記電極５より
大きい所定の電気抵抗たとえば107〜109Ω・cmお
よび柔軟性を有して上記感光体１表面に軽く接し
ている。また、上記電極５の裏面には電気抵抗が
たとえば104Ω・cm以下の電極剤７が一様に塗布
あるいは蒸着されており、この電極剤７および上
記電極５を介して上記接触子６に電圧が電圧印加
手段８によつて印加されるようになつている。 This charging device 4 is constructed as follows.
That is, 5 is a predetermined electrical resistance, for example 10 6 to 10 9
It is an arc-shaped electrode that is made of a conductive material with a thickness of 0.5 to 5 mm and has a resistance of Ω cm and is disposed along the surface of the photoreceptor 1, and is opposed to the surface of the electrode 5, that is, the surface of the photoreceptor 1. A contact 6 is provided on the side. This contactor 6 is made of carbon-mixed straight fibers (REC-B product name) that are flocked onto the electrode 5 using an adhesive made of the same material as the electrode 5, and has a thickness of 1 to 10 deniers. , length 0.1~
5 mm, a flocking density of 50 to 70 hairs/mm 2 , a predetermined electrical resistance greater than the electrode 5, for example, 10 7 to 10 9 Ω·cm, and flexibility, and is in light contact with the surface of the photoreceptor 1. Further, on the back surface of the electrode 5, an electrode agent 7 having an electric resistance of, for example, 10 4 Ω·cm or less is uniformly coated or vapor-deposited, and is applied to the contactor 6 via the electrode agent 7 and the electrode 5. A voltage is applied by voltage application means 8.
上記電圧印加手段８は帯電時には上記接触子６
に少なくとも上記感光体１の帯電極性と同極性の
直流成分を含む電圧を印加して上記感光体１を帯
電し、非帯電時には上記接触子６に少なくとも上
記感光体１の帯電極性と逆極性の直流成分を含む
電圧を印加して上記接触子６をクリーニングする
もので、次のように構成されている。すなわち、
上記電極剤７には一端子をアースした交流電源９
の他端子が第１の抵抗器１０および第１のコンデ
ンサ１１を介して接続されている。この交流電源
９はたとえば周波数400〜1000Hzで実効値400〜
600Vの交流電圧を接触子６に帯電時のみ印加す
るようになつている。また、上記電極剤７には第
２と第３の抵抗器１２，１３を介してリレー１４
のＣ端子が接続されている。このリレー１４は
N.C.端子が一端子をアースした直流＋50〜＋
600Vの第１の直流電源１５の他端子に、N.O.端
子が一端子をアースした直流−500〜−700Vの第
２の直流電源１６の他端子にそれぞれ接続してい
て、帯電時Ｃ端子とN.O.端子とを接続して接触
子６に負極性の直流電圧を印加し、非帯電時Ｃ端
子とN.C.端子とを接続して接触子６に正極性の
直流電圧を印加するようになつている。さらに、
上記第２と第３の抵抗器１２，１３の間には一端
子をアースした第２のコンデンサ１７の他端子が
接続されている。なお、上記第２のコンデンサ１
７は第１と第２の直流電源１５，１６を交流電圧
から保護するためのもの、上記第３の抵抗器１３
はリレー１４を保護するためのものである。 The voltage applying means 8 applies the contactor 6 during charging.
The photoreceptor 1 is charged by applying a voltage containing at least a DC component of the same polarity as the charging polarity of the photoreceptor 1 to the contactor 6 when the photoreceptor 1 is not charged. The contactor 6 is cleaned by applying a voltage containing a DC component, and is constructed as follows. That is,
The electrode material 7 has an AC power source 9 with one terminal grounded.
The other terminal is connected via a first resistor 10 and a first capacitor 11. For example, this AC power supply 9 has an effective value of 400 to 1000 Hz at a frequency of 400 to 1000 Hz.
The AC voltage of 600V is applied to the contact 6 only when charging. In addition, a relay 14 is connected to the electrode material 7 via second and third resistors 12 and 13.
The C terminal of is connected. This relay 14
DC +50 to + with one NC terminal grounded
The NO terminal is connected to the other terminal of the first DC power supply 15 of 600V and the other terminal of the second DC power supply 16 of -500 to -700V DC, one terminal of which is grounded, and when charged, the C terminal and NO A negative DC voltage is applied to the contact 6 by connecting the terminal, and a positive DC voltage is applied to the contact 6 by connecting the C terminal and the NC terminal when not charged. moreover,
Between the second and third resistors 12 and 13, a second capacitor 17 whose one terminal is grounded and the other terminal is connected. Note that the second capacitor 1
7 is for protecting the first and second DC power supplies 15 and 16 from AC voltage, and the third resistor 13
is for protecting the relay 14.
しかして、第２図に示すように、接触子６に
は、帯電時交流350〜500Vと直流−500〜−700V
とが重畳して印加され、非帯電時直流＋50〜＋
600Vが印加される。したがつて、帯電時には感
光体１を−450V程度の表面電位に帯電すること
ができる。このとき、接触子６の電位は感光体１
の表面電位と同極性すなわち負極性かつ感光体１
の表面電位より高いため、感光体１表面にその表
面電位と逆極性すなわち正極性に帯電して残留付
着しているわずかの現像剤等が接触子６に付着す
るが、非帯電時には接触子６が正極性にされ現像
剤等と同極性になるため、これら接触子６と現像
剤等との間にクーロンの法則にもとづく斥力が作
用し、現像剤等が接触子６から離反する。したが
つて、非帯電時には接触子６を自動的にクリーニ
ングすることができるため、現像剤等の付着によ
る帯電むら等の発生を防止できる。 As shown in FIG.
is applied in a superimposed manner, and DC +50 to + when uncharged.
600V is applied. Therefore, during charging, the photoreceptor 1 can be charged to a surface potential of about -450V. At this time, the potential of the contact 6 is
has the same polarity as the surface potential of photoreceptor 1, that is, negative polarity and
Since the surface potential of the photoreceptor 1 is higher than that of the surface potential of the photoreceptor 1, a small amount of developer etc. remaining on the surface of the photoreceptor 1 is charged to the opposite polarity to the surface potential, ie, positive polarity, and adheres to the contact 6, but when it is not charged, the contact 6 is made positive and has the same polarity as the developer, etc., so a repulsive force based on Coulomb's law acts between these contacts 6 and the developer, etc., and the developer etc. separates from the contact 6. Therefore, since the contactor 6 can be automatically cleaned when it is not charged, it is possible to prevent uneven charging due to adhesion of developer and the like.
なお、上記実施例では、接触子６を固定式にし
たが、本発明はこれに限ることなく、たとえば第
３図に示すように回転式にしてもよく、このよう
にすることにより帯電効果を向上することができ
る。 In the above embodiment, the contactor 6 is of a fixed type, but the present invention is not limited to this. For example, it may be of a rotating type as shown in FIG. 3, and by doing so, the charging effect can be reduced. can be improved.
また、本発明は非帯電時に直流成分の電圧とと
もに交流70〜700Vの電圧を印加してもよく、こ
のようにすることによりクリーニング効果を向上
することができる。 Further, in the present invention, an AC voltage of 70 to 700 V may be applied together with a DC component voltage when uncharged, and by doing so, the cleaning effect can be improved.
［発明の効果］
以上説明したように本発明によれば、帯電時に
は接触子に少なくとも被帯電体の帯電極性と同極
性の直流成分を含む電圧を印加して被帯電体を帯
電し、非帯電時には接触子に少なくとも被帯電体
の帯電極性と逆極性の直流成分を含む電圧を印加
して接触子をクリーニングする電圧印加手段を設
けたから、被帯電体に静電的に付着している現像
剤等の付着物が帯電時電位が被帯電体と同極性か
つ被帯電体よりも高い接触子に付着しても非帯電
時接触子を被帯電体と逆極性にすることにより接
触子から付着物を離反させることができ、以て定
期的クリーニングを行なうことなく接触子への付
着物の付着による帯電むら等の発生を防止するこ
とができる等優れた効果を奏する。[Effects of the Invention] As explained above, according to the present invention, when charging, a voltage containing at least a DC component of the same polarity as the charging polarity of the charged object is applied to the contact to charge the charged object, and the charged object is uncharged. Sometimes, a voltage application means is provided to clean the contact by applying a voltage containing at least a DC component with a polarity opposite to the charge polarity of the charged object to the contact, so that the developer electrostatically attached to the charged object can be removed. Even if such deposits adhere to a contact whose potential when charged is the same polarity as the charged body and higher than that of the charged body, the deposits can be removed from the contact by making the contact polarity opposite to the charged body when uncharged. This results in excellent effects such as being able to prevent the occurrence of charging unevenness due to deposits on the contact without performing periodic cleaning.
第１図は本発明の一実施例を示す構成図、第２
図は同実施例の作用説明図、第３図は他の実施例
を示す構成図である。
１……被帯電体（感光体）、６……接触子、８
……電圧印加手段。
FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of the operation of the same embodiment, and FIG. 3 is a configuration diagram showing another embodiment. 1... Charged body (photoreceptor), 6... Contact, 8
... Voltage application means.
Claims (1)
子に電圧を印加することにより上記被帯電体を帯
電するようにしたものにおいて、帯電時には上記
接触子に少なくとも上記被帯電体の帯電極性と同
極性の直流成分を含む電圧を印加して上記被帯電
体を帯電し、非帯電時には上記接触子に少なくと
も上記被帯電体の帯電極性と逆極性の直流成分を
含む電圧を印加して上記接触子をクリーニングす
る電圧印加手段を具備したことを特徴とする帯電
装置。1 In a device in which the object to be charged is charged by applying a voltage to the contact while the contact is in contact with the object to be charged, when charging, the contact has at least the same charging polarity as the object to be charged. The object to be charged is charged by applying a voltage including a DC component of polarity, and when the object is not charged, a voltage including at least a DC component of polarity opposite to the charging polarity of the object to be charged is applied to the contact. 1. A charging device comprising voltage application means for cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31150886A JPS62168174A (en) | 1986-12-25 | 1986-12-25 | Electrostatic charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31150886A JPS62168174A (en) | 1986-12-25 | 1986-12-25 | Electrostatic charging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62168174A JPS62168174A (en) | 1987-07-24 |
| JPS6343750B2 true JPS6343750B2 (en) | 1988-09-01 |
Family
ID=18018076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31150886A Granted JPS62168174A (en) | 1986-12-25 | 1986-12-25 | Electrostatic charging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62168174A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124757A (en) * | 1990-06-25 | 1992-06-23 | Minolta Camera Kabushiki Kaisha | Image forming method and apparatus including treatment and collection of residual developer |
| JPH08230831A (en) * | 1995-02-24 | 1996-09-10 | Yokohama Rubber Co Ltd:The | Package bag for moisture setting, one-pack type sealing material and production thereof |
| JP4708779B2 (en) * | 2004-12-14 | 2011-06-22 | キヤノン株式会社 | Image forming apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS519458A (en) * | 1974-07-13 | 1976-01-26 | Ricoh Kk | DENSHISHASHINFUKUSHAKINIOKERU FUKUSHASHINO HAKURISOCHI |
| JPS5463837A (en) * | 1977-10-31 | 1979-05-23 | Ricoh Co Ltd | Transfer device for copying machine for zerography |
| JPS56104346A (en) * | 1980-01-23 | 1981-08-20 | Toshiba Corp | Charging device of electrophotographic copier |
| JPS56126862A (en) * | 1980-03-10 | 1981-10-05 | Toshiba Corp | Electric charging method |
| JPS5842067A (en) * | 1981-09-08 | 1983-03-11 | Fuji Xerox Co Ltd | Charging device for copying mahcine |
-
1986
- 1986-12-25 JP JP31150886A patent/JPS62168174A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS519458A (en) * | 1974-07-13 | 1976-01-26 | Ricoh Kk | DENSHISHASHINFUKUSHAKINIOKERU FUKUSHASHINO HAKURISOCHI |
| JPS5463837A (en) * | 1977-10-31 | 1979-05-23 | Ricoh Co Ltd | Transfer device for copying machine for zerography |
| JPS56104346A (en) * | 1980-01-23 | 1981-08-20 | Toshiba Corp | Charging device of electrophotographic copier |
| JPS56126862A (en) * | 1980-03-10 | 1981-10-05 | Toshiba Corp | Electric charging method |
| JPS5842067A (en) * | 1981-09-08 | 1983-03-11 | Fuji Xerox Co Ltd | Charging device for copying mahcine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62168174A (en) | 1987-07-24 |
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