JPS58107553A - Electrostatic copying machine - Google Patents
Electrostatic copying machineInfo
- Publication number
- JPS58107553A JPS58107553A JP56207562A JP20756281A JPS58107553A JP S58107553 A JPS58107553 A JP S58107553A JP 56207562 A JP56207562 A JP 56207562A JP 20756281 A JP20756281 A JP 20756281A JP S58107553 A JPS58107553 A JP S58107553A
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- heater
- temperature
- surface temperature
- copying machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
- G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明に、帯電さ′ｎ友感光体上に原稿像ｉ−露光して
静電潜像を形成した後、前記潜像を現像するようにした
静電式複写機ＩＣ関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electrostatic copying machine in which an electrostatic latent image is formed by exposing an original image on a charged photoreceptor, and then the latent image is developed. Regarding IC.
従来からの静電式複写機ｌ（おいてに、感光体の温度条
件によ−って画像濃度が変化することがあり友。すなわ
ち感光体の温度が上昇すると、コロナ放電器ｌ（よる感
光体表面の帯電電位が低下するとともに、像露光時ｖＣ
ｍ光体表面から電荷が逃げやすくなり、それ１（、Ｊ″
って画像濃度が低下して一部。In conventional electrostatic copying machines, the image density may change depending on the temperature conditions of the photoreceptor. In other words, when the temperature of the photoreceptor increases, the corona discharger As the charged potential on the body surface decreases, vC during image exposure decreases.
The charge easily escapes from the surface of the m light body, and it becomes 1 (, J″
In some cases, the image density has decreased.
また感光体の温度が低下した場合ｒｃ ｒｊ、感光体表
面ＶＣ結露を生じ、そ−ｒｔ ｖｃよっても適正な画像
を得ることができなかつ友。Furthermore, when the temperature of the photoreceptor decreases, condensation occurs on the surface of the photoreceptor, making it impossible to obtain a proper image even with rtv.
不発引け、上述の技術的課題を解決し、感光体の結露防
止を図るとそもＩＣ，安定し友７像を得ることができる
よう１こした静電式複写機を提供するこごを目的とする
。The aim is to solve the technical problems mentioned above, prevent condensation on the photoreceptor, and provide an electrostatic copying machine that is capable of producing stable images using IC. shall be.
以下９図Ｉｔｌｌ（よって本発明の詳細な説明する。The present invention will be described in detail in Figure 9 below.
第１図に本発明の一実施例の転写型静電式複写機の一部
を示す断面図である。この転写型静電式複写機の図示し
ない機体の中央部には１回転筒体ｌの外＠曲に感光体２
を設けて成る感光ドラム３が配置される。この感光ドラ
ム３の四囲１Ｃｒｔ＠感光ドラム３０回転方向４に沿っ
て順に、帯電用コロす放電器５．現像装置６．転写用コ
ロナ放電器７゜剥離用除電器８．９およびクリーニング
の九めのグレード部材１０が配置さｎる。感光体２ｒｉ
帯電用コロナ放電器５Ｖｃよるコロナ放電ｌ（より帯電
さｎ、その帯電し７ｔｌ［８光体２０表面に二点鎖線矢
符１１で示すように原稿像が照射される。それに工つＣ
感光体２上ｆ（静電潜像が形成さｎ、その静電潜像は現
像ｆｉ！１１１６１こよって顕像化される。FIG. 1 is a sectional view showing a part of a transfer type electrostatic copying machine according to an embodiment of the present invention. In the central part of the body (not shown) of this transfer type electrostatic copying machine, there is a photoconductor 2 outside the cylindrical body 1 that rotates once.
A photosensitive drum 3 is arranged. Along the rotational direction 4 of the photosensitive drum 3, a charging roller 5. Developing device6. A corona discharger 7 for transfer, a static eliminator 8.9 for peeling, and a ninth grade member 10 for cleaning are arranged. Photoreceptor 2ri
A corona discharge l (more charged n) by a charging corona discharger 5Vc, and the charged 7tl [8 The original image is irradiated onto the surface of the light body 20 as shown by the double-dashed line arrow 11.
An electrostatic latent image is formed on the photoreceptor 2 (n), and the electrostatic latent image is visualized by development fi!11161.
一方、＃ｌ写紙は、破線矢符で示すようｆＣ一対の送り
込みロー２１２，１３および上下のガイド板１４．１５
によって、転写用コロナｂダ電器７０位置で感光体２ｖ
Ｃ密接して搬送さｎる。この際、転写用コロナ放電器７
（Ｃよって感光体２上の原稿像が複写紙に転写さｎる
。転写後の複写紙ｒｊ刺離用除電器８，９の働きによっ
て感光体２から剥離され、搬送ベルト１６などの搬送手
段ｌζよって搬送さｎ、さらに図示しない定、ｆ装置
ＶＣよって複写紙上の画像が定着さｎて複写画像が得ら
れる。ま九転写工程後ＶＣおいて感光体２の表面はブレ
ード部材１０／ＣＪ：りてクリーニングされる。On the other hand, #l paper has a pair of fC feeding rows 212, 13 and upper and lower guide plates 14, 15, as shown by dashed arrows.
Accordingly, the photoreceptor 2v is placed at the transfer corona b da electric device 70 position.
C. Conveyed in close contact. At this time, the transfer corona discharger 7
(Thus, the original image on the photoreceptor 2 is transferred to the copy paper. After the transfer, the copy paper rj is peeled off from the photoreceptor 2 by the action of the stabilizing static eliminators 8 and 9, and transferred to a conveyance means such as the conveyor belt 16. lζ conveys n, and furthermore, constant and f devices (not shown)
The image on the copy paper is fixed by the VC, and a copy image is obtained. After the transfer process, the surface of the photoconductor 2 is cleaned by using a blade member 10/CJ in VC.
本発明に従えば、唱光体２０衰血温度を検出する定めの
温度検出器１７が感光体２ （Ｃ近接して設けられ、ま
九感光体２の麦［ＩＤ湿度を制御する比めのヒータ１８
が感光体２ ＩＣ近接して設けらｎる・温度検出器１７
は友とえばサーミスタであり、この実施例では回転方向
４ ｉｃ沿って剥離用除電器９の下流側に配置される。According to the present invention, a predetermined temperature detector 17 for detecting the hypothermia temperature of the photoconductor 20 is provided adjacent to the photoconductor 2 (C), and a temperature detector 17 for detecting the hypothermia temperature of the photoconductor 2 is provided. Heater 18
A temperature sensor 17 is provided near the photoreceptor 2 and the IC.
is a thermistor, and in this embodiment, it is arranged downstream of the stripping static eliminator 9 along the rotational direction 4ic.
ヒータ１８は、感光ドラム３の内部あるいに外部ＩＣ設
けられ、設置スペースの関係上、第１図に示すようｖｃ
転写川用ロナ款’Ｉｌｌ器７の下方に配置されてもよい
。The heater 18 is provided with an IC inside or outside the photosensitive drum 3, and due to the installation space, the heater 18 is provided with an IC as shown in FIG.
It may be placed below the transcription unit 7.
第２図は温度検出器１７およびヒータ１８を含む回路図
である。温度検出器１７の出力電圧は制御回路１９に与
えられるとともに、演算増幅器２０の非反転入力に与え
られる。温度検出器１７の出力電圧と湿度との関係を示
すと、第３図のようになる。ここで、感光体２の帯電電
位が適正に保九ｎ、安定し次画像を得ることができるの
は、九とえば３５°Ｃであり、この３５°ＣＫおける電
圧Ｖ ｌが演算増幅器２００反転入力に基準電圧として
与えられる。演算増幅９２０の出力嗜には１発光ダイオ
ード２１お工び抵抗２２から成る直列回路を介して端子
２３が接続されており、この端子２３ （Ｃは直流電圧
が与えらｎる。FIG. 2 is a circuit diagram including the temperature detector 17 and the heater 18. The output voltage of the temperature detector 17 is applied to the control circuit 19 and also to the non-inverting input of the operational amplifier 20. The relationship between the output voltage of the temperature detector 17 and humidity is shown in FIG. 3. Here, the temperature at which the charged potential of the photoreceptor 2 can be properly maintained and stabilized and the next image can be obtained is, for example, 35°C, and the voltage Vl at this 35°C is Provided as a reference voltage to the input. A terminal 23 is connected to the output of the operational amplifier 920 via a series circuit consisting of one light emitting diode 21 and a resistor 22, and this terminal 23 (C is supplied with a DC voltage).
制御回路１９は、温度検出８１１７の出力電圧ＶＣ対応
して高圧トランス２４の出力電圧を制御する。The control circuit 19 controls the output voltage of the high voltage transformer 24 in accordance with the output voltage VC of the temperature detection 8117.
この高圧トランス２４の出力電圧は帯電用コロナ放電器
５ｆ−与えられている。なお制御回路１９け第４図１Ｃ
示すように、８度検出器１７ｒ（よる温度検出値が大す
なわち出力電圧が大となるＩＣつれて。The output voltage of this high voltage transformer 24 is given to the charging corona discharger 5f. In addition, 19 control circuits are shown in Fig. 4, 1C.
As shown, the temperature detected by the 8 degree detector 17r (the higher the IC, the higher the output voltage).
高圧トランス２４の出力電圧を比例的に大とする。The output voltage of the high voltage transformer 24 is increased proportionally.
ヒータ１８は、フォトサイリスク２５１に介して交流電
＃ ２６ （Ｃ接続されておＶ、前述の発光ダイオード
２１と７オトサイリスタ２５とは、スイッチング平膜と
してのフォトカプラ２７ｔ−構成する。The heater 18 is connected to an AC voltage #26 (C-connected to V) through a photothyristor 251, and the above-mentioned light emitting diode 21 and seven otothyristors 25 constitute a photocoupler 27t as a switching flat film.
感光体２４）表ｔｈＩ温度が比較的低温度すなわち３５
°Ｃ以下である場合を想定する。この場合ＶＣは温度検
出器１７の出力電圧■２が基準電圧ｖ１よりも小かある
いは等しいので、演算増幅器２０の出力はマイナスかあ
るいけ零となる。その友め１発光ダイオード２１が活性
化され、それに応じてフォトサイリスタ２５が導通して
ヒータ１８が電力付勢される。し友がってヒータ１８１
（よって加熱さｎて感光体２の表面温度が上昇し１ｇ光
体２０表面に結露を生じることが防止さｎる。Photoreceptor 24) The surface thI temperature is relatively low, that is, 35
Assume that the temperature is below °C. In this case, since the output voltage VC of the temperature detector 17 is smaller than or equal to the reference voltage v1, the output of the operational amplifier 20 is negative or even zero. The friend 1 light emitting diode 21 is activated, and in response, the photothyristor 25 becomes conductive and the heater 18 is energized. Friendly heater 181
(Thus, the surface temperature of the photoconductor 2 increases due to heating, and dew condensation on the surface of the 1g photoconductor 20 is prevented.
一方、制御回路１９ｒｊ、ｍ度検出器１７の出力電圧（
Ｃ基づいて高圧トランス２４の出力電圧を。On the other hand, the output voltage of the control circuit 19rj and the m-degree detector 17 (
The output voltage of the high voltage transformer 24 is based on C.
感光体２０表面温度が比較的低いとき／（ｒｊ比較的小
とし、前記表面温度が上昇するＩＣつれて徐々に大とし
ていく。When the surface temperature of the photoreceptor 20 is relatively low, /(rj is relatively small, and is gradually increased as the surface temperature of the IC increases.
ヒータ１８の電力付勢ｌＣ工って感光体２０衰一温度が
上昇して３５°Ｃを超えた場合ｔ−想定する。It is assumed that the temperature of the photoreceptor 20 rises and exceeds 35° C. when the heater 18 is energized by IC.
この場合１Ｃは、一度検出器１７の出力電圧ｖ２が基準
電圧Ｖｌを超えるので、＠算増＠器２０の出力がプラス
となる。そのため発光ダイオード２１が不活性化さｎ、
そｎに応じて］オドサイリスタ２５が遮断するのでヒー
タ１８の′電力付勢が停止される。し九がって感光体２
の加熱が停止される。In this case, in 1C, the output voltage v2 of the detector 17 exceeds the reference voltage Vl once, so the output of the multiplier 20 becomes positive. Therefore, the light emitting diode 21 is inactivated,
Accordingly, the odothyristor 25 is cut off, so that the power supply to the heater 18 is stopped. Photoreceptor 2
heating is stopped.
このようにしてヒータ１８の電力付勢をオンオツ制御す
ることｌｃｘす、ｋＳ光体２の表１ｉ［１縣度は３５糖
近に保たれ、安定した画像を得る仁とができる。By controlling the power supply of the heater 18 in this way, the power of the KS light body 2 is maintained close to 35%, making it possible to obtain a stable image.
一方、高圧トランス２４の出力電圧は制御回路１９の働
きによって、感光体２０麦而湿度が比較的高いとき１Ｃ
ｒｊ比較的大とされ、前記表Ｉｋｌ温度が降下するにつ
ｎて比較的小とされる。したがって。On the other hand, the output voltage of the high voltage transformer 24 is controlled by the control circuit 19 to 1C when the humidity of the photoreceptor 20 is relatively high.
rj is relatively large, and as the temperature Ikl in the table above decreases, n is relatively small. therefore.
帯電用コロナ放電器５による帯電電力はｓ＃Ｓ光体２の
表向温度ｌ（応じて適正な値ｒｃ ＄ｌＪ御される。The charging power by the charging corona discharger 5 is controlled by an appropriate value rc $lJ according to the surface temperature l of the s#S light body 2.
不発ＨＱ）他の実施例として、ヒータ１８ｉオンオツ制
御するｔめのフォトカプラ２７ＶＣ代えて。Misfire HQ) As another example, replace the tth photocoupler 27VC to control the heater 18i on/off.
他のスインチング手段を用いてもＩい。また本発明ｒｔ
感光紙に原稿像を直接形成する静電式複写機に聞達して
実施することができる。Other switching means may also be used. Also, the present invention rt
This method can be implemented using an electrostatic copying machine that directly forms an original image on photosensitive paper.
上述のごとく本発明ＩＣよれば、感光体の表向温度が６
下し過ぎて結露することが防止され、しかも前記表Ｉｉ
ｏ温度が上昇し過ぎることもなく、さらにコロナ放電器
の放電電力を前記表向温度に対応して制御しているので
、安定し比品質の画像を得ることができる。As described above, according to the IC of the present invention, the surface temperature of the photoreceptor is 6
It prevents dew condensation due to excessive lowering, and also meets the above Table Ii.
Since the temperature does not rise too much and the discharge power of the corona discharger is controlled in accordance with the surface temperature, it is possible to obtain images with stable and high quality.
第１図は本発明の一実施例の転写型静電式複写機の一部
を示す断面図、第２図は温度検出器１７お工びヒータ１
８會含む回路図、第３図は温度検出＠１７の出力電圧と
鮎度との関係を示すグラフ。
第４図＃″を温゛度検出器１７の出力電圧と高圧トラン
ス２４の出力電圧との関係を示すグラフである。
２・・・感光体、５・・・帯電用コロナ放電器、１７・
・・温度検出器、１８・・・ヒータ、１９・・・制御回
路、２４・・・高圧トランス、２７・・・フォトカプラ
代理人 弁理士 四教圭一部
亀１図
第２図FIG. 1 is a sectional view showing a part of a transfer type electrostatic copying machine according to an embodiment of the present invention, and FIG. 2 shows a temperature sensor 17 and a heater 1.
A circuit diagram including 8 parts, and Fig. 3 is a graph showing the relationship between the output voltage of temperature detection @17 and the sweetfish degree. FIG. 4 #'' is a graph showing the relationship between the output voltage of the temperature detector 17 and the output voltage of the high voltage transformer 24. 2... Photoreceptor, 5... Charging corona discharger, 17.
...Temperature detector, 18...Heater, 19...Control circuit, 24...High voltage transformer, 27...Photocoupler agent Patent attorney Kei Shikyo Part 1 Figure 2
Claims (1)
光して静電潜像を形成しｔ後、前記潜像を現像するよう
にした静電式複写機において。 前記感光体の表向付近ｖｃ温度検出器およびヒータが設
けられ、温度検出器によって検出された前Ｉ記感光体の
表ｔｈ］温度が予め定め次設定値以下であるとき１Ｃ前
記ヒータを電力付勢し、かつ前記表面配置が前記設定値
５ｒ超えたときＩＣ前記ヒータの電力付勢を停止する手
段が設けられ、前記コロナ放電器の放電電力＃：ｔＩＴ
Ｊ記表面感度が大となるにつれて大となるように制御さ
れることを特徴とする静電式複写機。[Scope of Claims] An electrostatic copying machine in which an original image is charged by a corona discharger and exposed to light on a photoreceptor to form an electrostatic latent image, and then the latent image is developed. A temperature detector and a heater are provided near the surface of the photoreceptor, and when the temperature of the surface of the photoreceptor detected by the temperature detector is equal to or lower than a predetermined value, the heater is powered on. and means for stopping power energization of the IC heater when the surface arrangement exceeds the set value 5r, and the discharge power of the corona discharger #: tIT
An electrostatic copying machine characterized in that the surface sensitivity is controlled to increase as the surface sensitivity increases.
Priority Applications (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56207562A JPS58107553A (en) | 1981-12-21 | 1981-12-21 | Electrostatic copying machine |
| US06/451,184 US4551009A (en) | 1981-12-21 | 1982-12-20 | Electrostatic copying apparatus |
| DE8282111857T DE3276915D1 (en) | 1981-12-21 | 1982-12-21 | Electrostatic copying apparatus |
| DE8686102749T DE3280320D1 (en) | 1981-12-21 | 1982-12-21 | ELECTROSTATIC COPIER. |
| EP89101621A EP0321450B1 (en) | 1981-12-21 | 1982-12-21 | Electrostatic copying apparatus |
| EP82111857A EP0082531B1 (en) | 1981-12-21 | 1982-12-21 | Electrostatic copying apparatus |
| DE8686102750T DE3280140D1 (en) | 1981-12-21 | 1982-12-21 | ELECTROSTATIC COPIER. |
| DE89101621T DE3280441T2 (en) | 1981-12-21 | 1982-12-21 | Electrostatic copier. |
| EP86102750A EP0193915B2 (en) | 1981-12-21 | 1982-12-21 | Electrostatic copying apparatus |
| EP86102749A EP0193914B2 (en) | 1981-12-21 | 1982-12-21 | Electrostatic copying apparatus |
| US06/762,670 US4650347A (en) | 1981-12-21 | 1985-08-05 | Temperature detector |
| US06/762,739 US4668075A (en) | 1981-12-21 | 1985-08-05 | Electrostatic copying apparatus |
| US06/762,738 US4642448A (en) | 1981-12-21 | 1985-08-05 | Electrostatic copying apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56207562A JPS58107553A (en) | 1981-12-21 | 1981-12-21 | Electrostatic copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58107553A true JPS58107553A (en) | 1983-06-27 |
Family
ID=16541789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56207562A Pending JPS58107553A (en) | 1981-12-21 | 1981-12-21 | Electrostatic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58107553A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995447A (en) * | 2013-02-15 | 2014-08-20 | 京瓷办公信息系统株式会社 | Image forming device |
-
1981
- 1981-12-21 JP JP56207562A patent/JPS58107553A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995447A (en) * | 2013-02-15 | 2014-08-20 | 京瓷办公信息系统株式会社 | Image forming device |
| JP2014157218A (en) * | 2013-02-15 | 2014-08-28 | Kyocera Document Solutions Inc | Image forming apparatus |
| EP2767873A3 (en) * | 2013-02-15 | 2017-10-11 | Kyocera Document Solutions Inc. | Image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59166980A (en) | Electrostatic picture recording device | |
| US3881085A (en) | Fuser control circuit for copying apparatus | |
| JP3056837B2 (en) | Fixing temperature control device | |
| JPS58107553A (en) | Electrostatic copying machine | |
| JPS5957264A (en) | Control device of electrostatic picture recording device | |
| US20020159784A1 (en) | Image forming apparatus having transfer bias control function | |
| JPH0862984A (en) | Image forming device | |
| JPS6114671A (en) | Electrophotographic copying device | |
| JPH0511647A (en) | Image forming device | |
| JPS58159552A (en) | Electrophotographic apparatus | |
| JPS61232475A (en) | Automatic image density controller for copying machine | |
| JPH1138702A (en) | Image forming device | |
| JP2001117378A (en) | Electro-photographic printer | |
| JPS63311286A (en) | Heating roller type fixing device | |
| JPS6156514B2 (en) | ||
| JPS60112278A (en) | Corona discharger | |
| EP0676678A1 (en) | Image forming apparatus | |
| JPS59142581A (en) | Stabilizing method of electrophotographic type picture | |
| JPH10104897A (en) | Image forming device | |
| JPS60131574A (en) | Control method of image density | |
| JP2005043411A (en) | Image forming apparatus | |
| JPS60182452A (en) | Electrophotographic apparatus | |
| JPH08152767A (en) | Image forming device | |
| JPS6363059A (en) | Image forming device | |
| JPS60140271A (en) | Electrophotographic copying machine |