JPH0488366A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0488366A JPH0488366A JP2205688A JP20568890A JPH0488366A JP H0488366 A JPH0488366 A JP H0488366A JP 2205688 A JP2205688 A JP 2205688A JP 20568890 A JP20568890 A JP 20568890A JP H0488366 A JPH0488366 A JP H0488366A
- Authority
- JP
- Japan
- Prior art keywords
- corona discharger
- shutter member
- photoreceptor
- corona
- 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.)
- Pending
Links
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電子写真複写機やレーザープリンターファクシ
ミリ等の画像形成装置に関するもので、特に画像流れの
防止を目的とした画像形成装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus such as an electrophotographic copying machine or a laser printer facsimile, and particularly to an image forming apparatus for preventing image deletion.
電子写真複写機やレーザープリンター、ファクシミリ等
の画像形成装置においては、導電性支持体上に、非晶質
シリコン（ａ−Ｓｉ感光体）、Ｓｅ、 ＡＳ、Ｓｅ３．
５ｅＴｅ等の無機系光導電材料（Ｓｅ感光体）、更には
ポリ−Ｎ−ビニルカルバゾール、トリニトロフルオレノ
ンや各種アゾ顔料などの有機系光導電材料（ＯＰＣ感光
体）等を塗設した感光体が一般に知られている。In image forming apparatuses such as electrophotographic copying machines, laser printers, and facsimile machines, amorphous silicon (a-Si photoreceptor), Se, AS, Se3.
Photoconductors coated with inorganic photoconductive materials such as 5eTe (Se photoconductors), and organic photoconductive materials (OPC photoconductors) such as poly-N-vinylcarbazole, trinitrofluorenone, and various azo pigments are used. generally known.
例えば、ｏｐｃ感光体は良好な電気特性や分光感度を有
し、しかも製造コストが安価で且つ無公害性であり、そ
の上ベルトやドラム状の感光体に比較的容易に加工でき
るという利点を持っているため、低速機より中速機まで
数多く利用されている。For example, OPC photoreceptors have good electrical properties and spectral sensitivity, are inexpensive to manufacture, are non-polluting, and have the advantage of being relatively easy to process into belt- or drum-shaped photoreceptors. Because of this, it is used in many applications ranging from low-speed to medium-speed.
一方、 ａ−５ｉ感光体は他の感光体に較べ帯電能が劣
るものの、高感度であり且つ耐摩耗性も大きいため、高
速複写機やレーザープリンター等に利用されている。On the other hand, although the a-5i photoreceptor has inferior charging ability compared to other photoreceptors, it is highly sensitive and has high abrasion resistance, so it is used in high-speed copying machines, laser printers, and the like.
このような感光体を使用する画像形成装置の一例を第３
図に示す。第３図において、この画像形成装置は感光体
ｌ、帯電用コロナ放電器２、露光部３、現像装置４、転
写用コロナ放電器５１分離用コロナ放電器６、トナーク
リーニング装置７、除電ランプ８及び定着装置１０から
構成されている。An example of an image forming apparatus using such a photoreceptor is shown in the third example.
As shown in the figure. In FIG. 3, this image forming apparatus includes a photoreceptor 1, a charging corona discharger 2, an exposure section 3, a developing device 4, a transfer corona discharger 51, a separating corona discharger 6, a toner cleaning device 7, and a static elimination lamp 8. and a fixing device 10.
感光体１は、帯電用コロナ放電器（帯電チャージャー）
２により一様に帯電される。コロナ放電器には、４０〜
１００声径のタングステンワイヤーが張架されたコロト
ロン方式と、不均一放電を均一化するために更にグリッ
ドをコロナ放電器開口部近傍に張架したスコロトロン方
式があり、４，０００〜８，０００ボルトの高電圧が印
加される。露光部３で像露光して静電潜像を形成した後
、現像装置４でトナー像を形成する。Photoreceptor 1 is a charging corona discharger (charging charger)
2, it is uniformly charged. For the corona discharger, 40~
There is a corotron method in which a tungsten wire with a diameter of 100 volts is stretched, and a scorotron method in which a grid is further strung near the opening of the corona discharger to equalize non-uniform discharge. high voltage is applied. After imagewise exposure is performed in the exposure section 3 to form an electrostatic latent image, a toner image is formed in the developing device 4.
トナー像は転写用コロナ放電器（転写チャージャー）５
でコピー用紙９に転写された後、コピー用紙は分離用コ
ロナ放電器（分離チャージャー）６で感光体より分離さ
れ、定着装置１０で定着されハードコピーとなる。一方
、転写後の感光体１のトナー像は、トナークリーニング
装置！？で清掃され、一連の複写工程が終了する。The toner image is transferred using a corona discharger (transfer charger) 5
After being transferred onto copy paper 9, the copy paper is separated from the photoreceptor by a separation corona discharger (separation charger) 6, and fixed by a fixing device 10 to become a hard copy. On the other hand, the toner image on the photoreceptor 1 after transfer is removed by a toner cleaning device! ? Then, the copying process is completed.
ところで、第３図に示されるような画像形成装置では、
帯電、転写及び分離を行なうためにコロナ放電器が用い
られているが、このような装置においては、放電に伴っ
てコロナ放電器からオゾン（０３）、窒素酸化物（ＮＯ
Ｘ）等のコロナ生成物が発生する。このコロナ生成物は
、放電エネルギーや大気中の水分、炭酸ガス、窒素ガス
等の作用で、窒素化合物やアルデヒド基、カルボキシル
基等の親水性化合物に変わるため、コロナ生成物が感光
体表面に付着すると、感光体表面が酸化されたり、化合
物の吸着と大気中の水分による吸湿で感光体の電気抵抗
（表面抵抗）が低下し、画像流れや更にひどい画像欠落
による白抜は現象により。By the way, in an image forming apparatus as shown in FIG.
A corona discharger is used to perform charging, transfer, and separation, but in such devices, ozone (03) and nitrogen oxides (NO
Corona products such as X) are generated. This corona product changes into hydrophilic compounds such as nitrogen compounds, aldehyde groups, and carboxyl groups due to the action of discharge energy, moisture in the atmosphere, carbon dioxide gas, nitrogen gas, etc., so the corona product adheres to the surface of the photoreceptor. As a result, the surface of the photoreceptor becomes oxidized, and the electrical resistance (surface resistance) of the photoreceptor decreases due to adsorption of compounds and moisture absorption from the atmosphere, resulting in image blurring and even worse white spots due to image loss.
コピー品質を著しく低下させるという問題を生じる。A problem arises in that the copy quality is significantly degraded.
この現象は大なり小なりほとんどの感光体で発生するが
、特にａ−５ｉ層を用いた感光体では、感光体表面に５
ｉ０２等の親水性物質が生じるため、画像流れを生じや
すく、また高耐久性の他に耐候性にも優れると考えられ
ていたａ−Ｃ：Ｆｌを保護層に用いた感光体でも、ａ−
５ｉ悪感光と同様な問題のあることが分かった。This phenomenon occurs in most photoreceptors to a greater or lesser degree, but especially in photoreceptors using an a-5i layer, the surface of the photoreceptor has a
Because hydrophilic substances such as i02 are generated, image fading is likely to occur.Also, even photoreceptors using a-C:Fl as a protective layer, which was thought to have excellent weather resistance as well as high durability, have a-
It was found that there was a problem similar to that of 5i.
これらの感光体では、高温になるほど画像流れがひどく
なり、全く画像を呈しないこともある。With these photoreceptors, the higher the temperature, the more severe the image fading becomes, and sometimes no image is displayed at all.
特に、ａ−Ｃ：Ｈ層を保護層とした。ｐｃ感光体を塔載
したレーザープリンター等では、複写機の停止中に帯電
用のマイナスコロナ放電器に対向した感光体表面が、コ
ロナ放電器に付着していたコロナ生成物のために汚染さ
れ、３０数２の湿度でも画像が欠落する白抜は現象が発
生する他、ａ−５ｉ悪感光でも除電用の交流コロナ放電
器対向部で白抜は現象が発生することがある。In particular, the a-C:H layer was used as a protective layer. In laser printers equipped with a PC photoreceptor, the surface of the photoreceptor facing the negative corona discharger for charging becomes contaminated due to corona products adhering to the corona discharger when the copying machine is stopped. Even at a humidity of 30:2, the phenomenon of white areas where the image is missing occurs, and even with A-5I exposure, the phenomenon of white areas may occur in the area facing the AC corona discharger for static elimination.
この白抜は現象は、コロナ放電器に付着していたものが
、コロナ放電器の開口部より感光体方向へ揮発遊離した
もので、およそコロナ放電器の開口幅で白抜けするのが
特徴である。このため、この部分のコロナ生成物の付着
量は多くなっていることが予想され、親水性のため少し
の水分でもあると表面抵抗が低下し、画像流れ状況を経
て、白抜は状況に至ると考えられる。This white spot is caused by substances that had adhered to the corona discharger being volatilized and released from the opening of the corona discharger toward the photoreceptor, and is characterized by a white spot that is approximately the width of the opening of the corona discharger. be. For this reason, it is expected that the amount of corona products attached to this area will be large, and because it is hydrophilic, even a small amount of moisture will lower the surface resistance, leading to image blurring and white areas. it is conceivable that.
このようなコロナ生成物に起因する白抜は現象の発生を
防止するために、例えば感光体の感光層ないしは保護層
中に酸化防止剤を添加したり、コロナ放電器のチャージ
ワイヤ、シールドケースあるいはグリッドをオゾン分解
性の金属（酸化物）でめっきしたり、あるいはコロナ放
電器のシールドケースの内壁やグリッドをオゾン吸収性
の活性炭繊維、酸化マンガン等で加工処理する方法など
を本発明者らは提案しているが、特に複写工程終了後、
感光体とコロナ放電器との間にシャッター部材を挿入す
る手段などにより、感光体とコロナ放電器との間を遮断
する方法は、簡便に白抜は現象を防止できるので有用で
ある。In order to prevent such white spots caused by corona products, for example, antioxidants may be added to the photosensitive layer or protective layer of the photoreceptor, or the charge wire of the corona discharger, the shield case, or The present inventors have developed methods such as plating the grid with an ozone-decomposing metal (oxide), or processing the inner wall of the shield case of the corona discharger and the grid with ozone-absorbing activated carbon fibers, manganese oxide, etc. However, especially after the copying process is completed,
A method of blocking the gap between the photoreceptor and the corona discharger, such as by inserting a shutter member between the photoreceptor and the corona discharger, is useful because it can easily prevent the phenomenon of white spots.
ところが、このような感光体とコロナ放電器との間にシ
ャッター部材を挿入して感光体−コロナ放電器間を遮断
するという方法においても、非常に大量の複写を行なっ
た場合には、画像に白抜は現象が発生する。これはシャ
ッター部材の持つコロナ生成物の付着力の問題と考えら
れる。すなわち、初期の段階では、コロナ生成物がシャ
ッター上に付着して離れずに存在しているが、大量の複
写を行なうとシャッター上に付着しきれず、感光体上に
あふれていき、白抜きを引き起こすと考えられる。However, even with this method of inserting a shutter member between the photoreceptor and the corona discharger to block the connection between the photoreceptor and the corona discharger, when a very large number of copies are made, the image quality may deteriorate. A phenomenon occurs in white areas. This is considered to be a problem with the adhesion of corona products to the shutter member. In other words, at the initial stage, corona products adhere to the shutter and remain there, but when a large number of copies are made, the corona products do not adhere to the shutter and overflow onto the photoreceptor, causing the white outline to disappear. It is thought to cause
往って、本発明の目的は、非常に大量の複写サイクルを
繰り返しても、コロナ放電器対向面の白抜は現象を発生
しない画像形成装置を提供することにある。An object of the present invention is to provide an image forming apparatus that does not cause white spots on the surface facing the corona discharger even after a very large number of copying cycles are repeated.
本発明によれば、導電性支持体上に感光層を積層してな
る感光体を塔載し且つ感光体に対向するように設置され
たコロナ放電器を備えた電子写真方式登用いる画像形成
装置において、コロナ放電器と感光体との間を遮断する
ためのシャッター部材を具備し、しかも該シャッター部
材のコロナ放電器側表面に、糸状菌及び／又は酵母菌を
培地と共に付着させたことを特徴とする画像形成装置が
提供される。According to the present invention, an image forming apparatus employing an electrophotographic method includes a photoreceptor formed by laminating a photoreceptor layer on a conductive support, and a corona discharger installed to face the photoreceptor. characterized in that it comprises a shutter member for blocking the gap between the corona discharger and the photoreceptor, and that filamentous fungi and/or yeast are attached to the surface of the shutter member on the corona discharger side together with the culture medium. An image forming apparatus is provided.
すなわち、本発明の画像形成装置は、感光体とコロナ放
電器との間を遮断するためのものであって、しかもコロ
ナ生成物を分解する糸状菌及び／又は酵母菌を培地と共
にコロナ放電器側に塗布したシャッター部材を備えたこ
とを特徴とするが、複写終了後、該シャッター部材を感
光体とコロナ放電器との間に挿入することによって、該
シャッター部材のコロナ放電器側表面に付着したコロナ
生成物が分解され、該生成物が蓄積されることがないの
で、シャッター機能が長く維持され、非常に大量の複写
サイクルを繰り返しても、白抜は現象の発生を防止でき
るものとなる。That is, the image forming apparatus of the present invention is intended to isolate between the photoreceptor and the corona discharger, and furthermore, the filamentous fungi and/or yeast that decompose corona products are placed on the corona discharger side together with the medium. The invention is characterized by comprising a shutter member coated with a coating material, and after copying is completed, by inserting the shutter member between the photoreceptor and the corona discharger, the shutter member is coated with Since the corona products are decomposed and they do not accumulate, the shutter function is maintained for a long time and the blanking phenomenon can be prevented even after a very large number of copying cycles.
次に、本発明で用いられるコロナ放電器と感光体との間
を遮断するシャッター部材について、図面を参照して説
明する。Next, the shutter member used in the present invention for blocking the gap between the corona discharger and the photoreceptor will be described with reference to the drawings.
第１図は本発明で用いられるコロナ放電器と感光体との
間を遮断するシャッター機構の一例を示す概略図である
。第１図において、１は感光体、２はグリッドを有する
スコロトロン形式のコロナ放電器である。コロナ放電器
２はシールドケース２０．４０〜１００Ｒのタングステ
ンワイヤーが主として使用されるチャージワイヤー２１
、及びスコロトロン方式コロナ放電器でいうグリッド２
２からなる。グリッドには、チャージワイヤーと同じタ
ングステンワイヤーやビニルワイヤーなどの絶縁体、あ
るいはエツチングなどでグリッド効果をもたらすように
孔加工を施した０、１〜０．５ｍｍ厚のステンレス板な
どが用いられる。２３はコロナ放電器の脇に取付けられ
たシャッター部材収納ケースであり、この収納ケース２
３は第２図に示されるように、シャッター部材巻取り方
式である。２５はシャッター部材がグリッド２２と感光
体ｌの間でスムースに出入り可能とするためのガイド板
である。FIG. 1 is a schematic diagram showing an example of a shutter mechanism used in the present invention for blocking a gap between a corona discharger and a photoreceptor. In FIG. 1, 1 is a photoreceptor and 2 is a scorotron type corona discharger having a grid. The corona discharger 2 has a shield case 20. The charge wire 21 is mainly made of tungsten wire of 40 to 100R.
, and grid 2 in the Scorotron corona discharger
Consists of 2. The grid is made of the same insulator as the charge wire, such as tungsten wire or vinyl wire, or a stainless steel plate with a thickness of 0.1 to 0.5 mm that has been etched with holes to produce a grid effect. 23 is a shutter member storage case attached to the side of the corona discharger, and this storage case 2
3, as shown in FIG. 2, is a shutter member winding system. Reference numeral 25 denotes a guide plate for allowing the shutter member to smoothly move in and out between the grid 22 and the photoreceptor l.
シャッター部材は可撓性があり、ある程度の反発力を有
し、巻取り可能なシート状のものであれば特に限定さ゛
れない。シャッター部材としては、例えばポリエチレン
テレフタレート（ＰＥＴ）、ポリアミドなどの各樹脂シ
ート、ステンレスシートなどが使用できる。The shutter member is not particularly limited as long as it is flexible, has a certain degree of repulsive force, and is in the form of a rollable sheet. As the shutter member, for example, various resin sheets such as polyethylene terephthalate (PET) and polyamide, stainless steel sheets, etc. can be used.
これらのシャッター部材は、第２図に示される収納ケー
ス２３内の回転軸に片端を固定し、画像形成装置が稼働
時、シャッター部材は収納ケース内に巻込まれ、複写工
程終了後、グリッドと感光体との間を遮断するように、
シャッター機構が作動するような形をとる。稼働幅は３
０〜４０ｍｍである。One end of these shutter members is fixed to a rotating shaft inside the storage case 23 shown in FIG. As if to shut off the body,
It takes the form of a shutter mechanism that operates. The operating width is 3
It is 0 to 40 mm.
シャッター部材は、１動装置がオフの状態では出た状態
になっており、駆動状態がオンのとき回転軸が回転し、
シャッター部材が収納される。駆動装置はモーターやソ
レノイドが利用できる。The shutter member is in an extended state when the single-acting device is off, and when the driving state is on, the rotating shaft rotates,
A shutter member is housed. A motor or solenoid can be used as the drive device.
以上、シャッター機構の一例について説明してきたが、
コロナ放電器と感光体との間を遮断する機能を備えてい
れば、上記構造以外のシャッター機構でも良い。An example of the shutter mechanism has been explained above, but
A shutter mechanism other than the structure described above may be used as long as it has a function of blocking the gap between the corona discharger and the photoreceptor.
本発明では上記のようなシャッター機構に加えて、シャ
ッター部材のコロナ放電器側表面に付着するコロナ生成
物が蓄積しないように、コロナ生成物を分解する糸状菌
及び／又は酵母菌を培地と共に、シャッター部材のコロ
ナ放電器側表面に塗布する。In the present invention, in addition to the shutter mechanism as described above, in order to prevent corona products from accumulating on the surface of the shutter member on the corona discharger side, filamentous fungi and/or yeast bacteria that decompose corona products are added together with a medium. Apply to the corona discharger side surface of the shutter member.
この場合、糸状菌としては、みずかび属、けかび属（ム
コール属）及びくものすかび属（リゾープス属）、はえ
かび属、こうじかび属（アスペルギルス属）、青かび属
（ペニシリウム属）、べにこうじかび属（モナスクス属
）、あかばんかび属（ノイロスポラ属）、ヘトミウム属
、エレモテシウム属及びアシュビア属、フザリウム属及
びギベレラ属、トリコデルマ属、ボトリチス属、クラド
スポリウム属、アルタナリア属、オイジウム属等を用い
ることが出来る。In this case, the filamentous fungi include the genus Aerialis, the genus Mucor, the genus Rhizopus, the genus Aspergillus, the genus Aspergillus, the genus Penicillium, Monascus, Neurospora, Hetomium, Eremothecium and Ashbia, Fusarium and Gibberella, Trichoderma, Botrytis, Cladosporium, Alternaria, Oidium etc. can be used.
なお、けかび属（ムコール属）及びくものすかび属（リ
ゾーブス属）には、ムコール・ルーキシイ、ムコール・
ムセド、リゾープス・ニグリカンス、リゾープス・ジャ
パニクス等がある。こうじかび属（アスペルギルス属）
には、アスペルギルス・オリゼー（黄どうじ菌）、・ア
スペルギルス・ソーエ（しょう油どうじ）、アスペルギ
ルス・ニガー、泡盛こうじかび、かつお節のこうじかび
等がある。青かび属（ペニシリウム属）には、ペニシリ
ウム・クリソゲヌム、ペニシリウム・カメンベルティ、
ペニシリウム・ロックフォルティ等がある。In addition, Mucor genus (Mucor genus) and Arachnoid genus (Rhizobus genus) include Mucor rukisii, Mucor
Musedo, Rhizopus nigricans, Rhizopus japanicus, etc. Koji mold (Aspergillus)
Examples include Aspergillus oryzae, Aspergillus soae, Aspergillus niger, awamori koji mold, and bonito flakes. The genus Penicillium includes Penicillium chrysogenum, Penicillium camemberti,
Examples include Penicillium roqueforti.
べにこうじかび属（モナスクス属）には、モナスウス・
パープレウス、モナスウス・アシ力等がある。The genus Monascus includes Monascus spp.
There are Perpureus, Monasius and Asiriki, etc.
あかばんかび属（ノイロスポラ属）には、ノイロスポラ
・クラッサ、ノイロスポラ・シトフィラ等がある。但し
、アスペルギルス・フラグスはアフラトキシンという発
がん性物質を作るので、またペニシリウム・イスランデ
ィクムは肝臓に有害な物質を作り出し、ペニシリウム・
シトリヌムはシトリニンという腎臓に有害な物質を作り
出すといわれており、安全上好ましくない。The genus Neurospora includes Neurospora crassa, Neurospora sitophila, etc. However, Aspergillus flagus produces a carcinogenic substance called aflatoxin, and Penicillium islandicum produces a substance harmful to the liver.
Citrinum is said to produce a substance called citrinin, which is harmful to the kidneys, and is therefore undesirable for safety reasons.
また、酵母菌としては、サツカロミセス属、ハンゼニュ
ラ属、ピヒア属、デバリオミセス属、シゾサツカロミセ
ス属、クリプトコツカス属、クロエケラ属、ハンゼニア
スボラ属、トルロプシス属（トルラ属）、キャンプイタ
属、ロードトルラ属、プレタノミセス属、トリゴノプシ
ス属等を用いることが出来る。In addition, yeasts include Satucharomyces, Hansenula, Pichia, Debaryomyces, Schizosatucharomyces, Cryptococcus, Kloechera, Hanseniusvora, Torulopsis (Torula), Campita, and Rhodotorula. , Pletanomyces , Trigonopsis , etc. can be used.
なお、サツカロミセス属には、サツカロミセス・セレビ
シェ、サツカロミセス・サケ、サツカロミセス・カール
スベルゲンシス、サツカロミセス・ジアスタチクス、サ
ツカロミセス・バストリアヌス、サツカロミセス・ルー
キシイ（イチゴサッカロミセス・マジョール）、サツカ
ロミセス・メリス、サツカロミセス・フラギリス、サツ
カロミセス・ラクチス等がある。例えば、パン酵母はサ
ツカロミセス・セレビシェに属する有胞子酵母類である
。The genus Satucharomyces includes Satucharomyces cerevisiae, Satucharomyces salmon, Satucharomyces carlsbergensis, Satucharomyces diastaticus, Satucharomyces bastrianus, Satucharomyces ruxii (Strawberry Saccharomyces major), Satucharomyces melis, Satucharomyces fragilis, Satucharomyces lacti S etc. For example, baker's yeast is a spore-bearing yeast belonging to the family Satucharomyces cerevisiae.
ハンゼニュラ属の代表菌株にはハンゼニュラ・アノマラ
があり、またピヒア属の代表菌株にはピヒア・メンブラ
ネファシエンスがある。A representative strain of the Hansenula genus is Hansenula anomala, and a representative strain of the Pichia genus is Pichia membranefaciens.
シゾサツカロミセス属には、シゾサツカロミセス・ボン
ベ、シゾサツカロミセス・オクトスボルス等がある。キ
ャンディダ属には、キャンディダ・ユチリス、キャンデ
ィダ・リポリチカ、キャンディダ・トロピカリス等があ
る。例えば、ｎ−パラフィンを炭素源として培養・生育
出来る石油酵母は、キャンディダ・リポリチカ及びキャ
ンディダ・トロピカリスであり、キャンディダ属の無胞
子薄母類である。但し、キャンディダ・アルビカンスの
ように、人間や動物に寄生する病原性酵母は安全上好ま
しくない。The genus Schizosatucharomyces includes Schizosatucharomyces bombe, Schizosatucharomyces octosborus, and the like. The Candida genus includes Candida utilis, Candida lipolytica, and Candida tropicalis. For example, petroleum yeasts that can be cultured and grown using n-paraffin as a carbon source are Candida lipolytica and Candida tropicalis, which are non-spore-bearing members of the genus Candida. However, pathogenic yeasts such as Candida albicans that are parasitic to humans and animals are not desirable from a safety standpoint.
また、培地は、温度が０℃〜４０℃、好ましくは２０℃
〜３５℃、ｐＨが８〜２．好ましくは５〜６、保水性が
高い雰囲気であることが要求され、例えばかんでん、水
溶性又は含水、性ポリマーマトリックス等が好ましい。In addition, the temperature of the culture medium is 0°C to 40°C, preferably 20°C.
~35°C, pH 8-2. Preferably 5 to 6, an atmosphere with high water retention is required, and for example, water-soluble or water-containing polymer matrices are preferred.
生育のための炭素源として、セルロース、デンプン、デ
キストリン及び／又は糖類（ショ糖、乳糖、麦芽糖、ブ
ドウ糖、果糖など）を含ませることが好ましい。但し、
糖類の濃度が高いと、特に分子量の小さい単糖類におい
ては、培養雰囲気の浸透圧を高くシ、酵母及び／又は糸
状菌の生育をおさえるため、７０パーセント以下である
ことが好ましい。It is preferable to include cellulose, starch, dextrin, and/or sugars (sucrose, lactose, maltose, glucose, fructose, etc.) as a carbon source for growth. however,
If the concentration of saccharides is high, especially for monosaccharides with small molecular weights, the osmotic pressure of the culture atmosphere will be high and the growth of yeast and/or filamentous fungi will be suppressed, so it is preferably 70% or less.
なお、糸状菌は強力なアミラーゼ（高分子炭化水素を加
水分解する酵素）を分泌するものが多く、セルロース、
デンプン及びデキストリンを炭素源に出来るが、アミラ
ーゼ、ペプチナーゼを分泌しない糸状菌及び酵母の場合
は、糖類を炭素源とすることが好ましい。従って、糸状
菌又は酵母菌−種を用いるよりも、二種以上の糸状菌又
は／及び酵母菌を用いることが好ましい。In addition, many filamentous fungi secrete strong amylase (enzyme that hydrolyzes high-molecular hydrocarbons),
Although starch and dextrin can be used as carbon sources, in the case of filamentous fungi and yeasts that do not secrete amylase or peptinase, it is preferable to use sugars as carbon sources. Therefore, it is preferable to use two or more types of filamentous fungi and/or yeast rather than using one species of filamentous fungi or yeast.
また、窒素源としてのコロナ生成物を補うために、培地
中に硫安、尿素、カゼイン、大豆粕、綿実粕、酵母エキ
ス、コーンスープクリア、アンモニウム塩類、硝酸塩類
を含ませることも有効である。水溶性又は含水性ポリマ
ーマトリックスとしては、セルロース、セルロース誘導
体、デンプン、デキストリン、ポリビニルアルコール、
水溶性ポリビニルアセタール、ポリアミド、ゼラチン等
が挙げられる。It is also effective to include ammonium sulfate, urea, casein, soybean meal, cottonseed meal, yeast extract, corn soup clear, ammonium salts, and nitrates in the medium to supplement corona products as nitrogen sources. . Water-soluble or water-containing polymer matrices include cellulose, cellulose derivatives, starch, dextrin, polyvinyl alcohol,
Examples include water-soluble polyvinyl acetal, polyamide, and gelatin.
導電性支持体上に非晶質炭素層や非晶質シリコン層を積
層した感光体を塔載し、且つ感光体に対向するように設
置されたコロナ放電器を備えた画像形成装置において、
複写後、感光体とコロナ放電器との間にシャッター部材
を挿入する手段によって、感光体とコロナ放電器との間
を遮断するという方法では、非常に大量の複写を行なっ
た場合には１画像に白抜は現象が発生する。In an image forming apparatus equipped with a photoreceptor having an amorphous carbon layer or an amorphous silicon layer laminated on a conductive support, and a corona discharger installed to face the photoreceptor,
After copying, the method of inserting a shutter member between the photoreceptor and the corona discharger to isolate the gap between the photoreceptor and the corona discharger does not allow for one image when a very large number of copies are made. The phenomenon occurs when there is a white outline.
しかし、本発明の画像形成装置においては、前記シャッ
ター部材のコロナ放電器側に、コロナ生成物質を分解す
る糸状菌及び／又は酵母菌が培地と共に塗布されている
ので、本発明装置を用いた場合には、大量の複写サイク
ルを繰り返しても、画像に白抜は現象が発生するのを防
止できる。However, in the image forming apparatus of the present invention, filamentous fungi and/or yeast bacteria that decompose corona-generating substances are coated on the corona discharger side of the shutter member together with the medium. In this way, even if a large number of copying cycles are repeated, the phenomenon of white spots on images can be prevented.
また、本発明の装置においては、感光体加熱を併用する
ことによって、更に良好な画像品質を維持することが出
来る。Further, in the apparatus of the present invention, even better image quality can be maintained by concurrently using photoreceptor heating.
以下、実施例により本発明の詳細な説明する。 Hereinafter, the present invention will be explained in detail with reference to Examples.
なお、部は重量部を表わす。Note that parts represent parts by weight.
実施例１
０ＰＣ感光体をプラズマＣＶＤ装置にセットし、排気ポ
ンプにより５ Ｘ １０−’ Ｔｏｒｒ以下に排気した
後、保護層の材料ガスとしてＣ２Ｈ４を１２０８ＣＣＭ
導入し、排気バルブで真空槽圧力を０．０２Ｔｏｒｒに
コントロールした。次いで、ＲＦ電極間ニ１３．５６Ｍ
Ｈｚ、３００ｖ（７）電力を印加し、６０分間反応させ
て約５，０００人のａ−Ｃ：０層を形成した。Example 1 A 0PC photoreceptor was set in a plasma CVD apparatus, and after exhausting to 5 X 10-' Torr or less using an exhaust pump, 1208 CCM of C2H4 was used as a material gas for the protective layer.
The pressure in the vacuum chamber was controlled at 0.02 Torr using an exhaust valve. Then, the distance between the RF electrodes is 13.56M.
Hz, 300 V (7) power was applied and reacted for 60 minutes to form approximately 5,000 a-C:0 layers.
以上のようにして得られた感光体を７８０ｍｍの単色光
を光源とし、第１．２図に示されるような構造のシャッ
ター機構を有する実験用レーザープリンターに塔載した
。なお、シャッター部材には、１００ｐｓのポリエチレ
ンテレフタレート（商品名ルミラー；東し社製）を用い
た。また、このシャッター部材のコロナ放電器側表面の
半分には、下記酵母菌含有培地形成用溶液を塗布し、４
０℃で乾燥しておいた。The photoreceptor thus obtained was mounted on an experimental laser printer having a shutter mechanism as shown in FIG. 1.2 using monochromatic light of 780 mm as a light source. Note that 100 ps polyethylene terephthalate (trade name: Lumirror; manufactured by Toshisha Co., Ltd.) was used for the shutter member. Further, half of the surface of this shutter member facing the corona discharger was coated with the following yeast-containing medium forming solution.
It was kept dry at 0°C.
酵母菌含有 地形 ゛
米こうじ１００部を水道水５００部に投入してゆっくり
と５５〜６０℃に昇温し、その温度で６時間保った。Yeast-containing topography ゛100 parts of rice koji was added to 500 parts of tap water, the temperature was slowly raised to 55-60°C, and the temperature was kept at that temperature for 6 hours.
その後沸騰させ、冷却後濾過して濾液に４０部のポリビ
ニルアルコールを追加して撹拌溶解し、更に小麦粉５０
部を追加した後、乾燥パン酵母２部を入れ、撹拌して酵
母菌含有培地形成用溶液とした。After that, boil it, cool it, filter it, add 40 parts of polyvinyl alcohol to the filtrate, stir and dissolve it, and then add 50 parts of wheat flour.
After adding 1 part of dry baker's yeast, 2 parts of dry baker's yeast were added and stirred to obtain a solution for forming a yeast-containing medium.
上記のレーザープリンターで３，０００枚画像出しをし
た後、１２時間休止し、休止後面像の確認を行ない、再
び３ 、０００枚画像出しをするというサイクルを繰り
返したところ、２０サイクル目（総コピー枚数６０，０
００枚目）で酵母菌含有培地形成用溶液未塗布部に相当
する位置の画像に白抜は現象が生じたが、酵母菌含有培
地形成用溶液塗布部に相当する位置の画像は良好であっ
た。（１２時間の休止中は、シャッター部材が感光体と
グリッド間に挿入されている。）
実施例２
実施例１で用いた酵母菌含有培地形成用溶液に変えて、
下記糸状菌含有培地形成用溶液を用いた以外は、実施例
１と同様にして評価を行なった。After printing 3,000 images with the above laser printer, we paused for 12 hours, checked the image after the pause, and then printed 3,000 images again. When we repeated the cycle, we reached the 20th cycle (total copy). Number of sheets: 60,0
00), a white spot phenomenon occurred in the image at the position corresponding to the area where the solution for forming a yeast-containing medium was not applied, but the image at the position corresponding to the area where the solution for forming the yeast-containing medium was applied was good. Ta. (During the 12-hour pause, a shutter member was inserted between the photoreceptor and the grid.) Example 2 In place of the yeast-containing medium forming solution used in Example 1,
Evaluation was performed in the same manner as in Example 1, except that the following filamentous fungus-containing medium forming solution was used.
１、 菌含有培地形成用溶液
米こうじ１００部を水道水５００部に投入してゆっくり
と５５〜６０℃に昇温し、その温度で６時間保った。1. Solution for forming culture medium containing bacteria 100 parts of rice koji was added to 500 parts of tap water, the temperature was slowly raised to 55-60°C, and the temperature was maintained for 6 hours.
その後、沸騰させ、冷却後濾過して濾液に４０部のポリ
ビニルアルコールを追加して撹拌溶解し、更に小麦粉５
０部を入れて撹拌した液を１００部取り出し、シヨ糖０
．５部、硝酸ナトリウム０．０１部、ＫＨＰＯ４０，０
１部、阿ｇｓｏ４・７Ｈ２００，０１部、ＫＣｌ２０．
０１部、黄こうじ菌１部を投入して撹拌し、糸状菌含有
培地形成用溶液とした。Then, boil it, cool it, filter it, add 40 parts of polyvinyl alcohol to the filtrate, stir and dissolve, and then add 5 parts of flour.
Take out 100 parts of the stirred solution and add 0 parts of sucrose.
．． 5 parts, sodium nitrate 0.01 part, KHPO40.0
1 part, Agso4.7H200, 01 part, KCl20.
01 parts and 1 part of Koji fungi were added and stirred to obtain a solution for forming a medium containing filamentous fungi.
評価の結果、２０サイクル目（総コピー枚数６０，００
０枚目）で糸状菌含有培地形成用溶液未塗布部に相当す
る位置の画像に白抜は現象が発生したが、糸状菌含有培
地形成用溶液塗布部に相当する位置の画像は良好であっ
た。As a result of the evaluation, the 20th cycle (total number of copies 60,000
In the 0th image), a phenomenon of white spots occurred in the image corresponding to the area where the solution for forming a filamentous fungus-containing medium was not applied, but the image at the position corresponding to the area where the solution for forming a filamentous fungus-containing medium was applied was good. Ta.
本発明の画像形成装置は、前記構成としたことから、複
写後、感光体とコロナ放電器との間に前記シャッター部
材を挿入することによって、非常に大量の複写サイクル
を繰り返しても、画像に白抜は現象が発生するのを防止
することができる。Since the image forming apparatus of the present invention has the above configuration, by inserting the shutter member between the photoreceptor and the corona discharger after copying, even if a very large number of copying cycles are repeated, the image cannot be maintained. White areas can prevent the phenomenon from occurring.
第１図は、本発明に係る画像形成装置における、コロナ
放電器と感光体との間を遮断するためのシャッター機構
の一例を示す概略部分断面図であり、また第２図は、前
記シャッター部材の収納具の一例を示す斜視図である。
更に第３図は、電子写真方式に用いられる画像形成装置
の一例を示す概略断面図である。
１・・・感光体、２・・・帯電用コロナ放電器（帯電チ
ャージャー）、３・・・露光部、４・・・現像装置、５
・・・転写用コロナ放電器（転写チャージャー）、６・
・・分離用コロナ放電器（分離チャージャー）、７・・
・トナークリーニング装置、８・・・除電ランプ、９・
・・コピー用紙、ｌＯ・・・定着装置、２０・・・シー
ルドケース、２１・・・チア−シワイヤー、２２・・・
グリッド、２３・・・シャッター部材収納ケース、２４
・・・シャッター部材、２５・・・ガイド板。
特許出願人 株式会社 リ コFIG. 1 is a schematic partial cross-sectional view showing an example of a shutter mechanism for blocking between a corona discharger and a photoreceptor in an image forming apparatus according to the present invention, and FIG. FIG. 2 is a perspective view showing an example of a storage device. Further, FIG. 3 is a schematic cross-sectional view showing an example of an image forming apparatus used for electrophotography. DESCRIPTION OF SYMBOLS 1... Photoreceptor, 2... Charging corona discharger (charger), 3... Exposure section, 4... Developing device, 5
...Transfer corona discharger (transfer charger), 6.
... Separation corona discharger (separation charger), 7...
・Toner cleaning device, 8... Static elimination lamp, 9.
... Copy paper, lO... Fixing device, 20... Shield case, 21... Cheer wire, 22...
Grid, 23...Shutter member storage case, 24
...Shutter member, 25...Guide plate. Patent applicant Rico Co., Ltd.
Claims (1)
塔載し且つ感光体に対向するように設置されたコロナ放
電器を備えた電子写真方式を用いる画像形成装置におい
て、コロナ放電器と感光体との間を遮断するためのシャ
ッター部材を具備し、しかも該シャッター部材のコロナ
放電器側表面に、糸状菌及び／又は酵母菌を培地と共に
付着させたことを特徴とする画像形成装置。(1) In an image forming apparatus using an electrophotographic method, which has a photoreceptor formed by laminating a photoreceptor layer on a conductive support and is equipped with a corona discharger installed to face the photoreceptor, corona An image characterized by comprising a shutter member for blocking the gap between the discharger and the photoreceptor, and in which filamentous fungi and/or yeast are attached together with a culture medium to the surface of the shutter member on the corona discharger side. Forming device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2205688A JPH0488366A (en) | 1990-08-01 | 1990-08-01 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2205688A JPH0488366A (en) | 1990-08-01 | 1990-08-01 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0488366A true JPH0488366A (en) | 1992-03-23 |
Family
ID=16511062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2205688A Pending JPH0488366A (en) | 1990-08-01 | 1990-08-01 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0488366A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110286767A1 (en) * | 2006-08-14 | 2011-11-24 | Canon Kabushiki Kaisha | Image forming apparatus |
| US20140212175A1 (en) * | 2008-12-19 | 2014-07-31 | Canon Kabushiki Kaisha | Corona charger including shutter |
-
1990
- 1990-08-01 JP JP2205688A patent/JPH0488366A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110286767A1 (en) * | 2006-08-14 | 2011-11-24 | Canon Kabushiki Kaisha | Image forming apparatus |
| US8244147B2 (en) * | 2006-08-14 | 2012-08-14 | Canon Kabushiki Kaisha | Charging apparatus with shutter |
| US20140212175A1 (en) * | 2008-12-19 | 2014-07-31 | Canon Kabushiki Kaisha | Corona charger including shutter |
| US9268248B2 (en) | 2008-12-19 | 2016-02-23 | Canon Kabushiki Kaisha | Corona charger including shutter |
| CN103605271B (en) * | 2008-12-19 | 2016-04-27 | 佳能株式会社 | Charging device |
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