JPS58130359A - Electronic copying device - Google Patents

Electronic copying device

Info

Publication number
JPS58130359A
JPS58130359A JP57013078A JP1307882A JPS58130359A JP S58130359 A JPS58130359 A JP S58130359A JP 57013078 A JP57013078 A JP 57013078A JP 1307882 A JP1307882 A JP 1307882A JP S58130359 A JPS58130359 A JP S58130359A
Authority
JP
Japan
Prior art keywords
lever
weather
high voltage
fair
prevented
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
Application number
JP57013078A
Other languages
Japanese (ja)
Inventor
Shinichi Iwasaki
岩崎 信一
Juichi Morimine
森峰 寿一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP57013078A priority Critical patent/JPS58130359A/en
Publication of JPS58130359A publication Critical patent/JPS58130359A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/02Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266Arrangements for controlling the amount of charge
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/02Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent fluctuation of an image due to abrupt change of an atmosphere using a simple device, by providing means for setting an environmental condition, and changing image forming conditions in accordance with this set condition. CONSTITUTION:A changeover lever 15 corresponding to the environmental conditions surrounding the apparatus is provided on an operational panel, and fair 16, cloudy 17, and rainy 18 are displayed on a display part, and they are connected to the high voltage control circuit 26 of a high voltage transformer 25. When the lever 15 is set to the position of fair 16, voltage of the transformer 25 is controlled, and corona currents emitted from a primary charger 20 and a secondary charger 21 become lowest. As a result, in a clear weather with low humidity, rise of charging efficiency and high image density is prevented, and in a rainly weather, reverse trouble is prevented, thus permitting copy density to be stabilized independent of variation of the atmosphere using a simple device.

Description

【発明の詳細な説明】 本発明は、電子複写装置における画像形成の条件設電に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to setting power conditions for image formation in an electronic copying apparatus.

一般に電子複写装置は1例えば湿度温度等の機外の環境
により、コピー画像の濃度が変化し易い傾向を有してい
る。その傾向として、低湿時は濃度が高く、逆に高湿時
は濃度が低くなる軸向がある。上記欠点は帯電効率の環
境変動や感光体の吸湿等によって生ずるものでちる〇上
記欠点を)Jj決する手段として、表面電位を自動制御
する手段を内蔵し、表面電位(例えば原稿の地に対応す
る明部電位と黒地原稿に対応する暗部電位)を常に一定
にする方法がある。
In general, electronic copying apparatuses have a tendency for the density of copied images to change easily depending on the environment outside the apparatus, such as humidity and temperature. The tendency is that when the humidity is low, the concentration is high, and when the humidity is high, the concentration is low. The above drawbacks are caused by environmental fluctuations in charging efficiency, moisture absorption of the photoreceptor, etc. As a means to resolve the above drawbacks, a built-in means for automatically controlling the surface potential is built-in, and the surface potential (for example, corresponding to the ground of the original) is incorporated. There is a method of keeping the bright area potential and the dark area potential corresponding to a black original at all times constant.

しかし、そのためには電位センサーe’jjfj”!、
測定回路゛、電位制御回路等の装備が心安であり、また
それらを配置する空間が装置に要求されるため、コスト
的、空間的に不利である。更に、制御シーケンスが複雑
なものとなるので、故障時の処置も困難なものになりて
し゛よう欠点が2ある。
However, for that purpose, a potential sensor e'jjfj"!
This method is disadvantageous in terms of cost and space because it is not safe to equip equipment such as a measuring circuit and a potential control circuit, and requires space in the device to arrange them. Furthermore, since the control sequence becomes complicated, there are two drawbacks: troubleshooting becomes difficult.

本発明の目的は、低コスト、少ないスペースで従来例と
同様な性能を有し、雰+4JY気の急激な変化による画
像の変動をも防止する横方装置を提供するものである〇 以下本発明を一実施例により説明する。
An object of the present invention is to provide a horizontal device that has performance similar to conventional examples at low cost and in a small space, and that also prevents image fluctuations due to sudden changes in atmosphere. will be explained using an example.

第1図は複写装置の操作パネル部の平面図であり、1〜
10は置数のためのテンキー、11゜12.13は画像
濃度調節ボタンで、それぞれ「こぐ」「ふつう」「うす
く」で3段階の濃度調節が出来る。14はコピースター
トキーである。15のレバーは本発明を適用した切換レ
バーでオシ、この実施例ではレバー15の左側にそれぞ
れ天気の状態を絵で表わした表示部がある。この表示部
の16は晴天、17け唾、18は雨天の表示である。な
おここでは環境設定のためにレバーを用いているが、ダ
イヤルやボタン等の別の切換手段でも良いのは勿論であ
る。
FIG. 1 is a plan view of the operation panel section of the copying machine.
10 is a numeric keypad for setting numbers, and 11, 12, and 13 are image density adjustment buttons, each of which allows you to adjust the density in three levels: ``kog'', ``normal'', and ``light''. 14 is a copy start key. Lever 15 is a switching lever to which the present invention is applied, and in this embodiment, on the left side of lever 15, there is a display section showing the weather condition with a picture. The display section 16 indicates clear weather, 17 indicates rainy weather, and 18 indicates rainy weather. Here, a lever is used for setting the environment, but it goes without saying that other switching means such as a dial or button may also be used.

第2図は本実施例の複写装置の制御系統を説明する図で
あり、図中、19はNP方式による感光トーラム、20
は1次帯電器、21は2次帯電器、22は全面露光ラン
プ、23は現像スリーブ、24は現1象器である。本実
施例の複写装置は1次帯電後、2次除電同時画像露光、
全面露光の各プロセスを経て潜像を形成するNPプロセ
スを用いている。25は高圧トランスであり、1次帯電
器20(プラス)の高圧および2次帯電器21(マイナ
ス)の高圧を発生する。
FIG. 2 is a diagram illustrating the control system of the copying apparatus of this embodiment, and in the figure, 19 is a photosensitive toram based on the NP method;
21 is a primary charger, 21 is a secondary charger, 22 is a full exposure lamp, 23 is a developing sleeve, and 24 is a developer. The copying apparatus of this embodiment performs a secondary charge removal simultaneous image exposure after primary charging.
An NP process is used in which a latent image is formed through each process of full-surface exposure. A high voltage transformer 25 generates a high voltage for the primary charger 20 (plus) and a high voltage for the secondary charger 21 (minus).

高圧トランス25は、制圧制御回路からの信号に応じて
高圧を発生するが、ここではレバー15の位置により高
圧トランスを制御する信号が変化する。つまシ表示16
の「晴天」位置にレバー15を設定すると、1次帯電器
20から流れる1次コロナ電流および2次帯電器21か
ら流れる2次コロナ電流が一會少なくなる。一方、と、
1次コロナ電流および2次コロナ電流が一番大きくなる
The high voltage transformer 25 generates high voltage in response to a signal from the pressure control circuit, and here the signal controlling the high voltage transformer changes depending on the position of the lever 15. Tsumushi display 16
When the lever 15 is set to the "fair weather" position, the primary corona current flowing from the primary charger 20 and the secondary corona current flowing from the secondary charger 21 are reduced by one point. On the other hand, and
The primary corona current and the secondary corona current are the largest.

これは表示16の「晴天」の時は湿度が低いために帯電
効率が高いが、逆′に表示18σ雨天」の時は湿度が高
いので帯電効率が低い。従って、晴天時はコピー濃度が
高く、一方、雨天時はコピー濃度が低くなるのを補正す
るものである。
This is because when the display 16 is "sunny weather", the humidity is low and the charging efficiency is high, but on the other hand, when the display is 18σ rainy weather, the humidity is high and the charging efficiency is low. Therefore, the correction is made for the fact that the copy density is high in sunny weather, whereas the copy density is low in rainy weather.

本実施例では、表示16の「晴天」と表示18の「雨天
」の中間は連続的に変化する楡にレバー15にパリオー
ムを採用している。
In this embodiment, the lever 15 uses a paliome to change continuously between the display 16 "sunny weather" and the display 18 "rainy weather".

以上によシ、簡単な装置により、コピー濃度を安定させ
ることが可能であシ、コンパクトな複写装置にも採用可
能な画像製置安定装置が提供出来る。また、表示を絵等
の記号にすれば誰にでも理解し易く、また複写機への親
しみ本増すであろう。参考に、本実施例のコロナ電流の
値を次の表に記す。これらの値は各湿度において設定電
位である暗部電位対明部電位が+450v対−150v
  となるための値である。
In view of the above, it is possible to stabilize the copy density using a simple device, and to provide an image preparation stabilizing device that can be adopted even in a compact copying machine. In addition, if the display is represented by symbols such as pictures, it will be easier for anyone to understand, and the reader will become more familiar with copying machines. For reference, the values of corona current in this example are shown in the following table. These values are based on the dark area potential vs. light area potential, which is the set potential at each humidity, of +450v vs. -150v.
This is the value for .

第1表:環境条件とコロナ電流との関係第3図はレバー
15に応じて、原稿照明用のランプの調光量を変化させ
る実施例を示す。
Table 1: Relationship between environmental conditions and corona current FIG. 3 shows an embodiment in which the amount of dimming of a lamp for illuminating an original is varied in accordance with the lever 15.

図の説明に訃いて27はプラテンガラス、28は反射笠
、29は原稿照明用のハロゲンランプ、でありガラス2
7上の原稿を照明し、原稿の反射像は反射ミラー30,
31,32.33および集レンズ34によシ感光ドラム
19上に投影される。(本実施例は先の第2図の実施例
と同じプロセス及び機構の複写装置を使用)。また、図
の36は現像バイアス電源であり、コピー濃度選択ボタ
ン11,12,13の選択により現像スリーブ23に印
加する現像バイアスを変化する。また37はハロゲンラ
ンプのレギュレーターで誂り、ハロゲンランプ29の電
源である。
27 is a platen glass, 28 is a reflective shade, 29 is a halogen lamp for illuminating the original, and glass 2
The original on 7 is illuminated, and the reflected image of the original is reflected on the reflection mirror 30,
31, 32, 33 and the condensing lens 34 onto the photosensitive drum 19. (This embodiment uses a copying machine with the same process and mechanism as the previous embodiment shown in FIG. 2). Further, numeral 36 in the figure is a developing bias power supply, and the developing bias applied to the developing sleeve 23 is changed by selecting the copy density selection buttons 11, 12, and 13. In addition, 37 is a halogen lamp regulator, which is a power source for the halogen lamp 29.

レギュレーター37は光量補正タイマー回路38で制御
される。光量補正タイマー回路38とは、原稿照明ハロ
ゲンランプ29の点灯電圧を連続コピー中徐々に変化さ
せる回路であり、上記第3図の実施例ではレバー15に
対応したパリオームによりその点灯電圧の変化幅が変わ
る。
The regulator 37 is controlled by a light amount correction timer circuit 38. The light amount correction timer circuit 38 is a circuit that gradually changes the lighting voltage of the document illumination halogen lamp 29 during continuous copying. In the embodiment shown in FIG. change.

光量補正タイマー38の一例を第4図に示す。An example of the light amount correction timer 38 is shown in FIG.

この回路は電流i39の初期値を大きくシ、連続コピー
に従って徐々に小さくし最終的にセロにするように制御
するものである。これによりランプレギニレータ−37
への信号は、初期は小さくて徐々に大きくなり、これに
よりランプ象の補正の場合であシ、逆にコピーcX度が
だんだん低くなる立下シ現象倉補正の場合はこの逆にす
る。以下立上り補正について述べることにする。々お電
流139の初期値は可変抵抗諏■)40およびVH41
によって設定されるが、本実施例ではVH20は環境条
件を設定するレバ−15に対応し、VB41は@調整用
の装置内部のプリント基板上に配置しである。
This circuit controls the initial value of the current i39 to be large, then gradually decreases as the copy continues, and finally reaches zero. As a result, the lamp reginulator-37
The signal to is initially small and gradually increases, which is the case in the case of correction of the ramp phenomenon, and conversely, in the case of the correction of the falling phenomenon in which the copy cX degree gradually decreases, the signal is reversed. The rise correction will be described below. The initial value of current 139 is variable resistor 40 and VH41.
In this embodiment, the VH20 corresponds to the lever 15 for setting the environmental conditions, and the VB41 is arranged on a printed circuit board inside the adjustment device.

なお、5W42け感光ドラム19の前回転の開始信号に
よりクローズとなり、コンデンfc44の充電が開始さ
れることによりアンプQ45の入力電圧が徐々に低下し
、従ってトランジスタQ46のベース電圧が徐々に低下
し、電流139は徐々に低下する。これはハロゲンラン
プ29の点灯電圧が徐々に低下することを意味する。
Note that the 5W42 photosensitive drum 19 is closed by the pre-rotation start signal, and charging of the capacitor FC44 is started, so that the input voltage of the amplifier Q45 gradually decreases, and therefore the base voltage of the transistor Q46 gradually decreases. Current 139 gradually decreases. This means that the lighting voltage of the halogen lamp 29 gradually decreases.

この現象はコンデンサC44の充電が完了するまで経続
する。またコピー終了後に感光ドラム19が後回転に入
ると、スイッチ8W42はオープンとなり、コンデンサ
C44は徐々に放電を開始するが、次の前回転信号が入
るまでの時間により、コンデンサC44の充電量が異な
る丸め、その時間により電流i39の初期値が異る。こ
れにより複写装置が使用されない時間をも考慮した制御
が可能となる。表お、本実施例では、コンデンサC44
の容量を充離完了まで約5分要す蝋を選んでいる。
This phenomenon continues until charging of capacitor C44 is completed. Furthermore, when the photosensitive drum 19 enters the rear rotation after copying is completed, the switch 8W42 is opened and the capacitor C44 gradually starts discharging, but the amount of charge in the capacitor C44 varies depending on the time until the next front rotation signal is input. The initial value of the current i39 varies depending on the rounding time. This allows control to take into consideration the time when the copying device is not used. In this example, capacitor C44
We have selected a wax that requires approximately 5 minutes to fill up the capacity.

さて、第3図の実施例では、レバー15が■Iに対応す
る様にしてあ抄、レバー15を表示16の「晴天」に対
応させたとき電流i39の初期値が大きくなる様、VB
40の抵抗値が最も小さくなる。逆に表示18の「雨天
」に対応させたときには逆にVB20の抵抗値が大きく
なる様にしている。
Now, in the embodiment shown in FIG. 3, the lever 15 is set to correspond to ■I, and when the lever 15 is set to correspond to the display 16 "clear weather", the initial value of the current i39 is set to be large.
The resistance value of 40 is the smallest. Conversely, when the display 18 corresponds to "rainy weather", the resistance value of VB20 is made to increase.

これは感光体の特性として低湿時は立上り量が最も大き
く、高湿時は立上り量が最も小さいためである。VB4
1はVB40と直列に配置されており、立上シ補正量は
VB41によっても変化させることが出来るが、通常V
R41の抵抗値変化幅をVB40の抵抗値変化幅より大
きくするのが望ましい。これはVB21は回路のプリン
ト板上に設けることにより、専門知識を有したサービス
マンだけが操作出来る様にし、その電子複写装置の設置
される地域環境あるいは使用感光ドラムの耐久枚数によ
って設定するものとし、天気(天候)の変化による立上
b−tの変化は操作パネル上のレバー15をニーず一自
身が設定することにした方が良a丸めである。
This is because, as a characteristic of the photoreceptor, the amount of rise is greatest when the humidity is low, and the amount of rise is the smallest when the humidity is high. VB4
1 is placed in series with VB40, and the startup correction amount can also be changed by VB41, but normally VB40
It is desirable to make the resistance value change width of R41 larger than the resistance value change width of VB40. The VB21 is installed on the printed circuit board so that it can only be operated by service personnel with specialized knowledge, and the setting is determined based on the local environment where the electronic copying machine is installed or the number of photosensitive drums used. It would be better if Nizuichi himself set the lever 15 on the operation panel to change the start-up b-t due to changes in the weather.

以上本発明を適用することにょシ、環境の変化(主とし
て湿度)による立上シ量の変化を、ユーザー自身がその
環境を示す表示(本実施例の場合は天気マーク)にレバ
ーの位置を設定することによシ防止し得る。本発明によ
れば環境の湿度全測定してこの結果に苓き自動的に切換
える装置を設けるよシも、低コストでしか本コンパクト
にすることができる@また。天気マーク等の絵表示にす
ることで誤操作することなく、且つ理解し易いものとす
ることが出来る。
In applying the present invention, the user himself/herself can set the position of the lever on the display indicating the environment (in the case of this embodiment, the weather mark) to reflect the change in the amount of start-up due to changes in the environment (mainly humidity). This can be prevented by doing so. According to the present invention, even by providing a device that measures all the humidity in the environment and automatically switches based on the results, the system can be made compact at low cost. By displaying pictures such as weather marks, it is possible to prevent erroneous operations and to make it easy to understand.

ところで第2図の実施例においては、転写帯電器(図示
はしてい危い)の高圧出力を同実施例のコロナ帯電器に
対するときと同様に変化させることにより、転写効率の
環境変動をも防止することができる。勿論第2図の実施
例と第3図の実施例を組合せることも可能である。環境
を示す手段としては、天気を示す絵・記号あるいは文字
−以外にも例えば季節、朝・昼・夕を示す絵や記号ある
いは文字とする。この場合、季節の変化等では湿度の制
御をする。まだ、朝と夕では休止時間が朝の#1うが長
く、立上り補正量を変えると良い。
By the way, in the embodiment shown in Fig. 2, by changing the high-voltage output of the transfer charger (not shown) in the same way as for the corona charger in the same embodiment, environmental fluctuations in transfer efficiency can also be prevented. can do. Of course, it is also possible to combine the embodiment of FIG. 2 and the embodiment of FIG. 3. As means for indicating the environment, in addition to pictures, symbols, or letters indicating the weather, for example, pictures, symbols, or letters indicating the season, morning, noon, and evening may be used. In this case, humidity is controlled due to seasonal changes. However, the downtime is still longer in the morning and evening than in #1 in the morning, so it would be better to change the start-up correction amount.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明を適用した操作パネルの平面図、第2回
込制御例の説明図、第3図は別の制御例の説明図、第4
図は光量補正タイマの電気回路図を示す。 図において、15は環境設定用のレバー、16・17・
1Bは環境の状況を示すマーク、19は感光ドラムを示
す。 出願人 キャノン株式会社 九j廿ふ
FIG. 1 is a plan view of an operation panel to which the present invention is applied, an explanatory diagram of a second recirculation control example, FIG. 3 is an explanatory diagram of another control example, and a fourth
The figure shows the electrical circuit diagram of the light intensity correction timer. In the figure, 15 is a lever for setting the environment, 16, 17,
1B is a mark indicating the environmental condition, and 19 is a photosensitive drum. Applicant: Canon Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] (1)環境状態を設定する手段と、この設定手段(1) Means for setting the environmental state and this setting means
JP57013078A 1982-01-29 1982-01-29 Electronic copying device Pending JPS58130359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57013078A JPS58130359A (en) 1982-01-29 1982-01-29 Electronic copying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57013078A JPS58130359A (en) 1982-01-29 1982-01-29 Electronic copying device

Publications (1)

Publication Number Publication Date
JPS58130359A true JPS58130359A (en) 1983-08-03

Family

ID=11823121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57013078A Pending JPS58130359A (en) 1982-01-29 1982-01-29 Electronic copying device

Country Status (1)

Country Link
JP (1) JPS58130359A (en)

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