JPH0486765A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- Publication number
- JPH0486765A JPH0486765A JP2201502A JP20150290A JPH0486765A JP H0486765 A JPH0486765 A JP H0486765A JP 2201502 A JP2201502 A JP 2201502A JP 20150290 A JP20150290 A JP 20150290A JP H0486765 A JPH0486765 A JP H0486765A
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- charging
- ozone
- photoreceptor
- contact
- 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
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000011133 lead Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012799 electrically-conductive coating Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 5
- 229920001296 polysiloxane Polymers 0.000 abstract description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000004677 Nylon Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 229920001778 nylon Polymers 0.000 abstract description 3
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 2
- 239000005061 synthetic rubber Substances 0.000 abstract description 2
- 239000011787 zinc oxide Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000010690 paraffinic oil Substances 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 33
- 239000011247 coating layer Substances 0.000 description 12
- 230000006866 deterioration Effects 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、感光体等の像担持部材の表面に、電圧を印加
した導電性部材を接触又は摺擦して帯電させる接触帯電
法を用いた電子写真装置に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention uses a contact charging method in which a conductive member to which a voltage is applied is charged by contacting or rubbing the surface of an image bearing member such as a photoreceptor. This relates to an electrophotographic device.
（従来の技術）
電子写真プロセスを用いる画像形成装置において、感光
体等の像担持部材（以下単に感光体という）の表面を帯
電させ、あるいは除電する手段として、従来からコロナ
帯電方式が広く適用されている。この帯電方式は、非接
触状態で感光体を均一に所定の電位に帯電させる方式と
して有効であるが、高圧電源を必要とすることや、コロ
ナ放電によってオゾンが発生し、感光体等に悪影響を及
ぼすという問題を有している。(Prior Art) In image forming apparatuses using an electrophotographic process, a corona charging method has been widely used as a means for charging or eliminating static electricity on the surface of an image bearing member such as a photoreceptor (hereinafter simply referred to as a photoreceptor). ing. This charging method is effective in uniformly charging the photoreceptor to a predetermined potential without contact, but it requires a high-voltage power supply and corona discharge generates ozone, which has an adverse effect on the photoreceptor. It has the problem of
このようなコロナ帯電方式に対して、電圧を印加した導
電部材を感光体に接触させて帯電させる接触帯電方式は
、コロナ帯電方式に比べて低い印加電圧で帯電させるこ
とができるから電源の低電圧化が図れること、また、オ
ゾン等の有害物の発生量が少ないなどの点から注目され
ている。In contrast to this type of corona charging method, the contact charging method, in which a conductive member to which a voltage is applied is brought into contact with the photoreceptor and charged, can be charged with a lower applied voltage than the corona charging method, so it requires less power supply voltage. It is attracting attention because it can be used to reduce waste, and because it generates less harmful substances such as ozone.
接触帯電方式を適用した画像形成装置は、例えば特開昭
６３−２１０８６４号公報に開示されている。第３図は
、その画像形成装置を示したもので、■は軸１ｅを中心
に矢印方向に所定の周速度で回転駆動されるドラムの上
に形成された感光体であり、接触型帯電ローラ２により
、その表面に所定電位の負又は正の均一な帯電処理を受
ける。帯電された感光体１は、画像露光部３にてスリッ
ト露光、レーザビーム走査露光等の光像りを受けること
により静電潜像が形成され、現像器４によってトナー現
像される。このトナー像は、給紙ローラ５でドラム周速
と同期搬送される転写材Ｐの表面に、転写用帯電器６に
より転写され、トナー像を保持する転写材は分離用帯電
器７によりドラム表面から分離され、搬送部８によって
定着部（不図示）に搬送、排出される。一方、トナー像
転写後の感光体表面は、クリーニング装置９によってク
リーニングされ、また除電ユニット１０で除電されて、
次のサイクルに供せられる。An image forming apparatus using the contact charging method is disclosed in, for example, Japanese Patent Laid-Open No. 63-210864. FIG. 3 shows the image forming apparatus, where ■ is a photoreceptor formed on a drum that is driven to rotate at a predetermined circumferential speed in the direction of the arrow around the shaft 1e, and a contact type charging roller. 2, the surface is uniformly charged with a predetermined potential, negative or positive. The charged photoreceptor 1 is subjected to light imaging such as slit exposure or laser beam scanning exposure in an image exposure section 3 to form an electrostatic latent image, which is then developed with toner by a developer 4 . This toner image is transferred by a transfer charger 6 to the surface of a transfer material P that is conveyed in synchronization with the peripheral speed of the drum by a paper feed roller 5, and the transfer material holding the toner image is transferred to the surface of the drum by a separation charger 7. The paper is separated from the paper, transported to a fixing section (not shown) by the transport section 8, and discharged. On the other hand, the surface of the photoconductor after the toner image transfer is cleaned by a cleaning device 9, and is neutralized by a static elimination unit 10.
Provided for the next cycle.
この例では、接触型帯電ローラ２は、ステンレス等の金
属芯金を軸棒２２とし、この周りに電気抵抗１０°Ω・
ｃｍ程度の導電性弾性層が設けられ、その外表面にさら
に面精度及び耐摩耗性の高い導電性ウレタンゴム被覆２
１が施され、線圧０，０１−０．２ｋｇ／ ｃｍで感光
体ｌに圧接し、電源２３から印加された高圧により接触
帯電させるものである。In this example, the contact-type charging roller 2 has a metal core made of stainless steel or the like as a shaft rod 22, and an electric resistance of 10°Ω.
A conductive elastic layer of about cm is provided, and the outer surface is further coated with conductive urethane rubber 2 with high surface precision and wear resistance.
1 is applied to the photoreceptor L at a linear pressure of 0.01 to 0.2 kg/cm, and contact charging is performed by high voltage applied from a power source 23.
この帯電ローラ２は、通常感光体の回転に伴って従動回
転するものであるが、別の駆動源によって感光体の回転
方向と順又は逆方向に任意の速度で積極的に回転駆動さ
せたり、非回転のまま押圧接触させてもよい。また、ロ
ーラ形状のものの外、ブラシやブレード形状のものも用
いられる。そして、例えば１〜２ＫＶの電圧が印加され
て、感光体に接触し、感光体表面を０．５〜ＩＫＶに帯
電させる。これは、数ＫＶの印加電圧を要するコロナ帯
電方式に比べて電源の低電圧化と共に、帯電器のシール
ド等に流れる無駄なシールド電流で発生するオゾンかな
いため、帯電装置から発生する全体的なオゾン量を低減
することができる。The charging roller 2 normally rotates in accordance with the rotation of the photoreceptor, but it may be actively rotated at an arbitrary speed in the same direction or in the opposite direction to the rotational direction of the photoreceptor by another drive source, or It may be brought into contact with pressure while not rotating. In addition to roller-shaped ones, brush- or blade-shaped ones can also be used. Then, a voltage of, for example, 1 to 2 KV is applied to contact the photoreceptor, and the surface of the photoreceptor is charged to 0.5 to IKV. This is because the voltage of the power supply is lower than that of the corona charging method, which requires an applied voltage of several kilovolts, and there is no ozone generated by wasted shield current flowing through the shield of the charging device, so the overall ozone generated from the charging device is reduced. amount can be reduced.
しかし、この接触帯電方式における帯電メカニズムも基
本的には帯電部材と感光体等の像担持部材表面との微小
キャップにおけるコロナ放電現象に基づくものであり、
このコロナ放電に伴うオゾン等の有害物質の発生は免れ
ず、これによって帯電部材自体の特性劣化や寿命の短縮
を招き、帯電不良を起こすこと、またコロナ帯電の場合
と同様に帯電部材表面又はその近傍に付着又は滞留して
いるオゾン生成物が感光体の停止時等に、その表面に徐
々に移行して、帯電部材の接触部又はその近傍の感光体
表面の特性を劣化させ、それによる画像流れ、画像にじ
み等の異常画像を生ずるなと、様々な問題があり、これ
らの問題は、帯電部材が感光体に接触しているという点
で、むしろ非接触のコロナ帯電方式に比べてより深刻な
問題となり得る。However, the charging mechanism in this contact charging method is also basically based on a corona discharge phenomenon in a microcap between the charging member and the surface of an image bearing member such as a photoreceptor.
This corona discharge inevitably generates harmful substances such as ozone, which can lead to deterioration of the characteristics of the charging member itself, shorten its lifespan, cause charging failure, and, as in the case of corona charging, the surface of the charging member or its When the photoreceptor is stopped, ozone products attached or staying nearby gradually migrate to the surface of the photoreceptor, deteriorating the characteristics of the contact area of the charging member or the surface of the photoreceptor in the vicinity, resulting in image damage. There are various problems such as abnormal images such as image bleeding and image blurring, and these problems are more serious than with the non-contact corona charging method because the charging member is in contact with the photoreceptor. This could be a problem.
このオゾン生成物は、導電性帯電ローラを順、逆方向に
積極的に回転駆動させたり、非回転で押圧接触させ、あ
るいは、特開昭５８−１５０９７５号公報に記載されて
いるように、研摩剤を含む帯電部材で感光体表面を研摩
し、オゾン生成物の蓄積を抑制することも可能であるが
、逆に帯電部材にオゾン生成物が蓄積され、画像乱れ等
の発生を早めるという結果を招き、摺擦させる場合は、
帯電部材や感光体表面を摩耗劣化させる問題も生ずる。This ozone product can be applied by actively rotating the conductive charging roller in forward and reverse directions, by pressing it into contact without rotating, or by polishing as described in JP-A-58-150975. It is possible to suppress the accumulation of ozone products by polishing the surface of the photoreceptor with a charging member containing a charging agent, but this results in the accumulation of ozone products on the charging member, which accelerates the occurrence of image disturbances. When inviting and rubbing,
There also arises the problem of abrasion and deterioration of the charging member and the surface of the photoreceptor.
（発明が解決しようとする課題）
本発明は、上記従来技術の問題点を解決するもので、帯
電時に発生するオゾン等の有害物質に起因する帯電部材
及び感光体等の像担持部材の特性劣化を防止し、また、
オゾン生成物の蓄積をなくして高品質の画像を安定して
得るようにした電子写真装置を提供することを目的とす
る。(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems of the prior art, and is characterized by deterioration of characteristics of charging members and image bearing members such as photoreceptors due to harmful substances such as ozone generated during charging. prevent and also
It is an object of the present invention to provide an electrophotographic apparatus that eliminates the accumulation of ozone products and stably obtains high-quality images.
（課題を解決するための手段）
この目的を達成するために、本発明は、像担持部材の表
面に、電圧を印加した導電性帯電部材を接触又は摺擦し
て帯電させる接触帯電法を用いた電子写真装置において
、
（１）導電性帯電部材が、少なくともその表面にオゾン
生成物と反応する金属粉末を含む導電性被覆層を備えた
構成とする。また、
（２）オゾン生成物と反応する金属粉末と共に、滑剤と
なる粉末をも含む導電性被覆層を備えた構成とする。(Means for Solving the Problems) In order to achieve this object, the present invention uses a contact charging method in which a conductive charging member to which a voltage is applied is charged by contacting or rubbing the surface of an image bearing member. In the electrophotographic apparatus according to the present invention, (1) the conductive charging member is provided with a conductive coating layer containing metal powder that reacts with ozone products on at least its surface; (2) A conductive coating layer including a metal powder that reacts with ozone products as well as a powder serving as a lubricant is provided.
ここで用いられるオゾン生成物と反応する金属としては
、銅、鉛、銀、ニッケル、亜鉛、若しくはそれらの合金
又は混合物が好適である。Suitable metals used here that react with the ozone product are copper, lead, silver, nickel, zinc, or alloys or mixtures thereof.
（作 用）
この構成によれば、コロナ放電で発生するオゾン生成物
等を吸着固定し、不活性にするため、像担持部材や帯電
部材の特性劣化がなく、常に高品質の画像を安定して得
ることができる。また、オゾン生成物等の吸着固定と共
に、導電性被覆層が滑性を有するため、像担持部材や帯
電部材の摩耗が低減され、また像担持部材の表面と密接
するので、均一帯電と帯電効率の向上が得られる。(Function) According to this configuration, ozone products generated by corona discharge are adsorbed and fixed and made inactive, so there is no deterioration of the characteristics of the image bearing member or charging member, and high quality images are always maintained. You can get it. In addition to adsorbing and fixing ozone products, the conductive coating layer has lubricity, which reduces wear on the image bearing member and charging member.Also, since it comes into close contact with the surface of the image bearing member, uniform charging and charging efficiency are achieved. can be improved.
（実施例） 以下、図面を参照して実施例を詳細に説明する。(Example) Hereinafter, embodiments will be described in detail with reference to the drawings.
第１図は、本発明の一実施例を示したものであり、１０
０は像担持部材（以下単に感光体という）で、導電性支
持体１１０上に無機・有機光導電層、無機と有機の複合
型光導電層又はこれら光導電層表面に樹脂やアモルファ
スカーボン等のオーバコートを施した感光層（あるいは
誘電層）１２０を設けたものである。２０＋は感光体！
００に押圧接触する接触帯電ローラで、中心にステンレ
ス等の金属製軸棒２１１を有し、その周りに電気抵抗が
ｌＯ°Ω・ｍ以下、好ましくは１０″Ω・印オーダーで
、Ｊ Ｉ Ｓ−Ａ硬度がｌＯ〜４０、好ましくは２０〜
３０の導電性弾性層２２１、さらにその表面に電気抵抗
が１０’〜ｌＯ“Ω・ｃｍ、好ましくは１０”〜ｌＯ″
′Ω・印で、シヨアＤ硬度が２０〜２００、好ましくは
５０〜１００の導電性被覆層２３１が設けられている。FIG. 1 shows an embodiment of the present invention, in which 10
Reference numeral 0 designates an image bearing member (hereinafter simply referred to as a photoreceptor), which is coated on a conductive support 110 with an inorganic/organic photoconductive layer, an inorganic/organic composite photoconductive layer, or a resin, amorphous carbon, etc. on the surface of these photoconductive layers. A photosensitive layer (or dielectric layer) 120 is provided with an overcoat. 20+ is a photoreceptor!
It is a contact charging roller that presses into contact with the 00, and has a metal shaft 211 made of stainless steel or the like in the center, and the electric resistance around it is 10°Ω・m or less, preferably on the order of 10″Ω・mark, and is JIS. -A hardness is lO~40, preferably 20~
30 conductive elastic layer 221, and further has an electrical resistance of 10' to 10" Ωcm, preferably 10" to 10" on its surface.
An electrically conductive coating layer 231 having a Shore D hardness of 20 to 200, preferably 50 to 100, as indicated by 'Ω· is provided.
電圧は高圧電源４００がら軸棒２１１に印加され、導電
性弾性層２２１を介して導電性被覆層２３１へ伝達され
る。接触帯電ローラ２０１は、感光体１００に対し、Ｏ
、Ｏｌ〜０ 、２ ｋｇ ／ ａｎ 、好ましくは０．
０５〜Ｏ，１ｋｇ／ａｍの線圧で押圧接触され、感光体
の回転に対して従動回転、又は図示しない別駆動源によ
り順又は逆方向に積極回転され、摺擦される。A voltage is applied to the shaft rod 211 from the high voltage power supply 400 and is transmitted to the conductive covering layer 231 via the conductive elastic layer 221. The contact charging roller 201 charges O to the photoreceptor 100.
, Ol ~ 0, 2 kg/an, preferably 0.
It is pressed into contact with a linear pressure of 0.05 to 0.05 kg/am, and is actively rotated in the forward or reverse direction by a driven rotation relative to the rotation of the photoreceptor or by another drive source (not shown), and rubbed.
この接触帯電ローラ２０１は、例えばステンレス等の金
属製軸棒２＋１の周りに導電性付与剤としての導電性カ
ーボンブラック、可塑剤としてのパラフィン系オイル、
補強用充填剤としての酸化亜鉛やステアリン酸その他過
酸化物等を添加したシリコーン、ネオプレン、イソプレ
ン等の合成ゴムの弾性層２２１を形成する。次いで、こ
の外周を研削後、その表面に、導電性カーボンブラック
と、銅、鉛、銀、ニッケル、亜鉛等のオゾン生成物と反
応する金属粉末をアクリル、エポキシ、ウレタン、シリ
コーン、ナイロン等の樹脂溶液に均一分散した塗料を用
いて、スプレー法やデイピング法により１００μｍ以下
、好ましくは１０〜５０μｍの導電性かつオゾン生成物
との反応性被覆層２３１を形成する。This contact charging roller 201 includes conductive carbon black as a conductivity imparting agent, paraffin oil as a plasticizer, etc. around a metal shaft rod 2+1 made of, for example, stainless steel.
An elastic layer 221 of synthetic rubber such as silicone, neoprene, isoprene, etc. to which zinc oxide, stearic acid, or other peroxide as a reinforcing filler is added is formed. Next, after grinding this outer periphery, conductive carbon black and metal powder that reacts with ozone products such as copper, lead, silver, nickel, and zinc are coated with resin such as acrylic, epoxy, urethane, silicone, and nylon. Using a paint uniformly dispersed in a solution, a coating layer 231 that is conductive and reactive with ozone products is formed with a thickness of 100 μm or less, preferably 10 to 50 μm, by a spray method or a dipping method.
このように構成された本実施例では、導電性被覆層２３
１に混入されている反応性金属がオゾン生成物を効果的
に吸着固定し、不活性にするため、感光体や帯電部材の
特性劣化を防止することができる。なお、反応性金属粉
末を内部弾性層２２＋に混入し、オゾン生成物との反応
活性の長期化を図ることもできる。In this embodiment configured in this way, the conductive coating layer 23
Since the reactive metal mixed in 1 effectively adsorbs and fixes ozone products and renders them inactive, deterioration of the characteristics of the photoreceptor and charging member can be prevented. Note that reactive metal powder can also be mixed into the internal elastic layer 22+ to prolong the reaction activity with the ozone product.
導電性被覆層２３１に対して、オゾン生成物と反応する
金属粉末の外に、滑剤となる粉末を一緒に混合すること
もできる。即ち、前記金属粉末と、滑剤としてのグラフ
ァイトカーボン、二硫化モリブデン、ポリフッ化ビニリ
デン、ポリテトラフルオロエチレン、シリコーン等の２
０μｍ以下、好ましくは０．１−１５μｍの微粉末をア
クリル、エポキシ、ウレタン、シリコーン、ナイロン等
の樹脂溶液に均一分散し、これを塗料として、スプレー
法やデイピング法により１００μｍ以下、好まし−くは
１０〜５０μｍの被覆層２３１を形成する。In addition to the metal powder that reacts with the ozone product, a lubricant powder can also be mixed into the conductive coating layer 231. That is, the metal powder and two such as graphite carbon, molybdenum disulfide, polyvinylidene fluoride, polytetrafluoroethylene, silicone, etc. as a lubricant.
A fine powder of 0 μm or less, preferably 0.1-15 μm, is uniformly dispersed in a resin solution such as acrylic, epoxy, urethane, silicone, nylon, etc., and this is used as a coating material, preferably 100 μm or less, by spraying or dipping. forms a coating layer 231 with a thickness of 10 to 50 μm.
これにより、オゾン生成物を吸着固定し、感光体や帯電
部材の特性劣化を防止すると共に、被覆層２３１が滑性
を有するので感光体との密着性がよくなり、それによっ
て帯電の均一性、帯電効率の向上を図ることができる。As a result, ozone products are adsorbed and fixed, preventing deterioration of the characteristics of the photoreceptor and charging member, and since the coating layer 231 has slipperiness, it improves adhesion to the photoreceptor, thereby improving the uniformity of charging. Charging efficiency can be improved.
第２図は、本発明の他の実施例を示したものであり、被
覆層２３２のみを導電性とし、これにオゾン生成物との
反応性を付与したもの、あるいはそれに、さらに滑性を
付与したものである。この場合軸棒２１２及び内部層２
２２は導電性である必要はなく、軸棒２１２をプラスチ
ック製にすることや内部層２２２への導電性カーボンブ
ラックの混入を省くことが可能となる。被覆層２３２は
、第１図の場合の導電性弾性被膜２３１と同様に形成し
、高圧電源４００をこの被覆層２３２に摺擦等により接
続する。FIG. 2 shows another embodiment of the present invention, in which only the coating layer 232 is made conductive and is given reactivity with ozone products, or is further given lubricity. This is what I did. In this case the shaft 212 and the inner layer 2
22 does not need to be electrically conductive, and it is possible to make the shaft rod 212 made of plastic and to omit the mixing of electrically conductive carbon black into the inner layer 222. The covering layer 232 is formed in the same manner as the conductive elastic coating 231 in FIG. 1, and the high voltage power source 400 is connected to the covering layer 232 by rubbing or the like.
（発明の効果）
以上説明したように、本発明によれば、接触帯電部材の
少なくとも導電性被覆層にオゾン生成物との反応性金属
粉末を均一に分散させ、又はそれに滑性を付与する微粉
末を添加することにより、■帯電部材表面と感光体表面
との微小間隙で起こるコロナ放電で発生したオゾン生成
物等を化学的に吸着固定し、不活性とするので、帯電部
材や感光体の特性劣化を防止し、かつこれら有害物質の
蓄積や移行によって生ずる画像流れ等の異常画像を未然
に防止して長期に安定した画像を形成することができる
。また、
■滑性の効果により、帯電部材表面や感光体表面の摩耗
劣化が低減されると共に、帯電部材の感光体表面への均
一な密着により均−帯電及び帯電効率の向上を図ること
ができる。(Effects of the Invention) As explained above, according to the present invention, metal powder reactive with ozone products is uniformly dispersed in at least the conductive coating layer of the contact charging member, or By adding the powder, it chemically adsorbs and fixes ozone products generated by corona discharge that occurs in the microgap between the charging member surface and the photoreceptor surface, making them inactive, so that the charging member and photoreceptor It is possible to form stable images over a long period of time by preventing characteristic deterioration and abnormal images such as image blurring caused by the accumulation and migration of these harmful substances. In addition, due to the lubricity effect, abrasion and deterioration of the surface of the charging member and the surface of the photoreceptor can be reduced, and uniform charging and charging efficiency can be improved by uniformly adhering the charging member to the surface of the photoreceptor. .
第１図は、本発明の一実施例の接触帯電部の構成図、第
２図は、本発明の他の実施例の接触帯電部の構成図、第
３図は、接触帯電方式を適用した従来の画像形成装置の
構成図である。
１００・・像担持部材（感光体）、１１０・・ 導電性
支持体、１２０・・・感光層、２０１，２０２・・・接
触帯電ローラ、２２１・・・導電性弾性層、２２２・・
・内部層、２３１・・・導電性被覆層、２３２・・・被
覆層。
特許出願人 株式会社 リ コ
代 理 人 星 野 恒 司’、；、
１ Ｆ
第 ３ ＫFIG. 1 is a configuration diagram of a contact charging section according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a contact charging section according to another embodiment of the present invention, and FIG. 3 is a configuration diagram of a contact charging section according to an embodiment of the present invention. 1 is a configuration diagram of a conventional image forming apparatus. 100... Image bearing member (photoreceptor), 110... Conductive support, 120... Photosensitive layer, 201, 202... Contact charging roller, 221... Conductive elastic layer, 222...
- Internal layer, 231... conductive coating layer, 232... coating layer. Patent applicant: Riko Co., Ltd. Agent: Kouji Hoshino';
1 F 3rd K
Claims (3)
部材を接触又は摺擦して帯電させる接触帯電法を用いた
電子写真装置において、 前記導電性帯電部材が、少なくともその表面に、オゾン
生成物と反応する金属粉末を含む導電性被覆層を備えて
いることを特徴とする電子写真装置。(1) In an electrophotographic apparatus using a contact charging method in which a conductive charging member to which a voltage is applied is charged by contacting or rubbing the surface of an image bearing member, the conductive charging member is attached to at least the surface of the image bearing member. An electrophotographic device comprising an electrically conductive coating layer containing a metal powder that reacts with ozone products.
ッケル、亜鉛、若しくはそれらの合金又は混合物である
ことを特徴とする請求項（１）記載の電子写真装置。(2) The electrophotographic apparatus according to claim 1, wherein the metal that reacts with the ozone product is copper, lead, silver, nickel, zinc, or an alloy or mixture thereof.
部材を接触又は摺擦して帯電させる接触帯電法を用いた
電子写真装置において、 前記導電性帯電部材が、少なくともその表面に、オゾン
生成物と反応する金属粉末と、滑剤となる粉末とを含む
導電性被覆層を備えていることを特徴とする電子写真装
置。(3) In an electrophotographic apparatus using a contact charging method in which a conductive charging member to which a voltage is applied is charged by contacting or rubbing the surface of an image bearing member, the conductive charging member at least on the surface thereof: An electrophotographic apparatus comprising an electrically conductive coating layer containing a metal powder that reacts with ozone products and a powder that serves as a lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2201502A JPH0486765A (en) | 1990-07-31 | 1990-07-31 | Electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2201502A JPH0486765A (en) | 1990-07-31 | 1990-07-31 | Electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486765A true JPH0486765A (en) | 1992-03-19 |
Family
ID=16442119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2201502A Pending JPH0486765A (en) | 1990-07-31 | 1990-07-31 | Electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486765A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5576806A (en) * | 1994-08-24 | 1996-11-19 | Fuji Xerox Co., Ltd. | Charging roll for electrophotography |
| WO2004081671A1 (en) * | 1995-09-05 | 2004-09-23 | Hiroshi Nagame | Device for electrically charging photosensitive body |
| JP2008164707A (en) * | 2006-12-27 | 2008-07-17 | Toray Eng Co Ltd | Image forming apparatus and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03224916A (en) * | 1990-01-30 | 1991-10-03 | Shin Caterpillar Mitsubishi Ltd | Rotatable arm member |
| JP2007119249A (en) * | 2005-09-30 | 2007-05-17 | Meidensha Corp | Load compensating mechanism |
| JP2012067809A (en) * | 2010-09-21 | 2012-04-05 | Tokyo Institute Of Technology | Continuously variable transmission |
| JP2012161846A (en) * | 2011-02-03 | 2012-08-30 | Keio Gijuku | Rotation mechanism |
-
1990
- 1990-07-31 JP JP2201502A patent/JPH0486765A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03224916A (en) * | 1990-01-30 | 1991-10-03 | Shin Caterpillar Mitsubishi Ltd | Rotatable arm member |
| JP2007119249A (en) * | 2005-09-30 | 2007-05-17 | Meidensha Corp | Load compensating mechanism |
| JP2012067809A (en) * | 2010-09-21 | 2012-04-05 | Tokyo Institute Of Technology | Continuously variable transmission |
| JP2012161846A (en) * | 2011-02-03 | 2012-08-30 | Keio Gijuku | Rotation mechanism |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5576806A (en) * | 1994-08-24 | 1996-11-19 | Fuji Xerox Co., Ltd. | Charging roll for electrophotography |
| WO2004081671A1 (en) * | 1995-09-05 | 2004-09-23 | Hiroshi Nagame | Device for electrically charging photosensitive body |
| JP2008164707A (en) * | 2006-12-27 | 2008-07-17 | Toray Eng Co Ltd | Image forming apparatus and method |
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