JPH041904B2 - - Google Patents
Info
- Publication number
- JPH041904B2 JPH041904B2 JP57147957A JP14795782A JPH041904B2 JP H041904 B2 JPH041904 B2 JP H041904B2 JP 57147957 A JP57147957 A JP 57147957A JP 14795782 A JP14795782 A JP 14795782A JP H041904 B2 JPH041904 B2 JP H041904B2
- Authority
- JP
- Japan
- Prior art keywords
- illumination lamp
- heater
- voltage
- effective voltage
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
- G03G15/80—Details relating to power supplies, circuits boards, electrical connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は静電複写機に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to an electrostatic copying machine.
従来例の構成とその問題点
近年、静電複写機の普及は著しいものがあり、
官公庁や企業の事務所はもちろん商店や一般家庭
にも普及しつつある現状である。しかしながら、
静電複写機は消費電力の大きな機器であり、特に
一般家庭の電源コンセントは比較的小電流容量の
ものが多く、特別に電気工事が必要であつたり、
或いは低性能な比較的消費電力の小さな静電複写
機を使用せざるを得ないという問題があつた。従
来、このために照明ランプの点灯時に定着ヒータ
への供給電力を階段的に低下させる案も試みられ
幾分改善はされたが、電源電圧の変動や照明ラン
プの設定電圧のバラツキなどで複写機の消費電力
を一定にすることは出来ないため、消費電力のピ
ーク時の電源コンセントを設置するか、または低
性能の複写機を設置せねばならざるを得なく、極
めて不十分な改善にすぎなかつた。Conventional configuration and its problems In recent years, electrostatic copying machines have become rapidly popular.
Currently, they are becoming popular not only in government offices and corporate offices, but also in shops and ordinary households. however,
Electrostatic copying machines are devices that consume a lot of power, and many power outlets in general homes have a relatively low current capacity, so special electrical work may be required.
Alternatively, there was a problem in that it was necessary to use an electrostatic copying machine with low performance and relatively low power consumption. Conventionally, attempts have been made to reduce the power supplied to the fixing heater stepwise when the illumination lamp is turned on, and although some improvement has been achieved, it has been found that the copying machine Since it is not possible to keep the power consumption constant, it is necessary to install power outlets at peak power consumption or install low-performance copying machines, which is an extremely insufficient improvement. Ta.
発明の目的
本発明はこの点に鑑み、消費電力を一般家庭で
も十分に使用できるように最大消費電力を一定以
下にし、且つ性能を確保する手段を提供すること
を目的とするものである。Purpose of the Invention In view of this point, it is an object of the present invention to provide a means for reducing the maximum power consumption to a certain level or less and ensuring performance so that the power consumption can be sufficiently used in a general household.
発明の構成
上記目的を達成するために、本発明は、原稿を
照明ランプにより露光し、静電潜像を形成してか
ら現像し複写紙に転写し、更に転写された複写紙
をヒータの加熱により定着する静電複写機であつ
て、前記照明ランプの実効電圧を検出する手段
と、前記ヒータの実効電圧を検出する手段を備
え、前記照明ランプの実効電圧を検出する手段の
負帰還回路によつて前記照明ランプに印加する実
効電圧をほぼ一定にする制御手段と、前記照明ラ
ンプの実効電圧を検出する手段に前記ヒータの実
効電圧を検出する手段を付加した負帰還回路によ
り前記ヒータに印加する実効電圧を制御する手段
を備え、前記照明ランプと前記ヒータのそれぞれ
に印加する実効電圧の和をほぼ一定以下にするよ
うに構成したものである。Structure of the Invention In order to achieve the above object, the present invention exposes an original to light using an illumination lamp, forms an electrostatic latent image, develops it and transfers it to copy paper, and further heats the transferred copy paper with a heater. An electrostatic copying machine that fixes the image by a negative feedback circuit of the means for detecting the effective voltage of the illumination lamp, the electrostatic copying machine comprising means for detecting an effective voltage of the illumination lamp, and means for detecting an effective voltage of the heater. Therefore, the effective voltage applied to the illumination lamp is applied to the heater by a negative feedback circuit including a control means for keeping the effective voltage applied to the illumination lamp substantially constant, and a means for detecting the effective voltage of the heater in addition to the means for detecting the effective voltage of the illumination lamp. The lamp is provided with means for controlling an effective voltage, and is configured to keep the sum of the effective voltages applied to each of the illumination lamp and the heater substantially constant or less.
実施例の説明
以下本発明の一実施例を図面に基づいて説明す
る。第１図において、商用交流電源に接続される
ACライン１０１，１０２の間に照明ランプ１と
直列にサイリスタ５を、並列に変圧器３を接続
し、又ヒータ２と直列にサイリスタ６を、並列に
変圧器４を接続してある。変圧器３と４の二次側
は低圧側でそれぞれダイオードＤ１〜Ｄ４とＤ５
〜Ｄ８、コンデンサＣ１とＣ２により端子Ｃ〜Ｄ
間と端子Ｅ〜Ｆ間に直流に変換される。ホトサイ
リスタ８と９はそれぞれサイリスタ５と６のゲー
ト極を付勢するもので、端子ＡとＢに通電された
時にそれぞれを付勢する。電源ライン１０１，１
０２に接続される変圧器７の二次側は低圧側でダ
イオードＤ９〜Ｄ１２によつて端子Ｋ−E′間に脈
流となる。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings. In Figure 1, the
A thyristor 5 is connected in series with the illumination lamp 1 and a transformer 3 is connected in parallel between the AC lines 101 and 102, and a thyristor 6 is connected in series with the heater 2 and a transformer 4 is connected in parallel. The secondary sides of transformers 3 and 4 are diodes D1-D4 and D5 on the low voltage side, respectively.
~D8, terminals C~D by capacitors C1 and C2
It is converted into direct current between the terminals E and F. Photothyristors 8 and 9 energize the gate poles of thyristors 5 and 6, respectively, and energize each when terminals A and B are energized. Power line 101,1
The secondary side of the transformer 7 connected to the terminal 02 is on the low voltage side, and a pulsating current is generated between the terminals K and E' by the diodes D9 to D12.
次に第２図において、線路１０３，１０４は直
流低定電圧が供給されている。トランジスタＱ７
は電源の両波脈流が印加された端子Ｋ−E′により
半波毎のパルスを発生し、このパルスによつてト
ランジスタＱ６は抵抗Ｒ１とコンデンサＣ３によ
り定まる時定数の三角波を作る。一方、演算増幅
器（以下、OPアンプと称す）IC１の＋入力端子
にはVR１とＲ２，Ｒ３により定まる基準電圧が
印加され、−入力端子には抵抗Ｒ４を介して端子
Ｄが接続され、線路１０３とそれに接続された端
子Ｃと合せて線路１０３電圧VDDよりＣ−Ｄ間電
圧だけ低い電圧が印加される。OPアンプIC１の
出力端子には両入力端子間の差に応じた出力電圧
が生じ、この出力電圧は前記三角波が−入力端子
に接続されるOPアンプIC２の＋入力端子に接続
され、この三角波の方がOPアンプIC２の出力電
圧を越えた時にOPアンプIC１の出力電圧が消滅
し、トランジスタＱ５は失勢し、端子Ａに電圧が
生じ、ホトサイリスタ８に通電し、サイリスタ５
を導通し、照明ランプ１を点灯する。 Next, in FIG. 2, lines 103 and 104 are supplied with a low constant DC voltage. transistor Q7
generates pulses every half wave by the terminal K-E' to which the double-wave pulsating current of the power supply is applied, and by these pulses, the transistor Q6 generates a triangular wave with a time constant determined by the resistor R1 and the capacitor C3. On the other hand, a reference voltage determined by VR1, R2, and R3 is applied to the +input terminal of the operational amplifier (hereinafter referred to as OP amplifier) IC1, and the terminal D is connected to the -input terminal via a resistor R4, and the line 103 A voltage lower than the line 103 voltage V DD by the C-D voltage is applied to the line 103 and the terminal C connected thereto. An output voltage corresponding to the difference between both input terminals is generated at the output terminal of the OP amplifier IC1, and this output voltage is connected to the + input terminal of the OP amplifier IC2, where the triangular wave is connected to the - input terminal. When the output voltage exceeds the output voltage of OP amplifier IC2, the output voltage of OP amplifier IC1 disappears, transistor Q5 loses power, voltage is generated at terminal A, energizes photothyristor 8, and thyristor 5
conducts and lights up the illumination lamp 1.
このように照明ランプ１が点灯した電圧は変圧
器３から再び端子Ｃ−Ｄ間に供給され、可変抵抗
VR１によりあらかじめ調整された基準電圧との
比較によりサイリスタ５の位相制御の導通角が定
まり、照明ランプ１は一定の照度で点灯する。又
照明ランプ１を点灯する必要のない時は第３図の
中央処理回路（以下、CPU回路と称す）１０の
端子Ｇから供給される信号をトランジスタＱ１と
Ｑ４により基準電圧を極端に高くし、サイリスタ
５を不導通にする。又原稿を露光走査する戻り時
等ではCPU回路１０の端子Ｈからの信号により
トランジスタＱ２とＱ３により基準電圧を若干高
くし、照明ランプ１の照度を激減させるも若干通
電し、次の露光走査時における照明ランプ１の照
度の立上りに備える。 The voltage at which the lighting lamp 1 is turned on in this way is supplied again from the transformer 3 between terminals C and D, and is applied to the variable resistor.
The conduction angle of the phase control of the thyristor 5 is determined by comparison with a reference voltage pre-adjusted by VR1, and the illumination lamp 1 is lit with a constant illuminance. When the lighting lamp 1 does not need to be lit, the reference voltage of the signal supplied from the terminal G of the central processing circuit (hereinafter referred to as the CPU circuit) 10 shown in FIG. 3 is made extremely high through transistors Q1 and Q4. Thyristor 5 is made non-conductive. Also, when returning from exposing and scanning an original, the reference voltage is slightly increased by transistors Q2 and Q3 in response to a signal from terminal H of the CPU circuit 10, and although the illuminance of the illumination lamp 1 is drastically reduced, it is slightly energized, and at the time of the next exposure scan. Prepare for the rise in illuminance of the illumination lamp 1 at .
次に可変抵抗VR２と抵抗Ｒ８，Ｒ９で定まる
基準電圧はOPアンプIC３の＋入力端子に、端子
Ｆは抵抗Ｒ６を介して−入力端子にそれぞれ接続
されている。端子Ｃは線路１０３に、端子Ｄは端
子Ｅと接続されており、線路１０３と端子Ｆの間
には照明ランプ１とヒータ２の印加電圧の和に応
じた電圧が印加される。この電圧と基準電圧との
差に応じた電圧がOPアンプIC３の出力端子に生
じる。OPアンプIC４はこの電圧が＋入力端子に、
−入力端子に前記三角波電圧が接続され、更にそ
の出力電圧がトランジスタＱ１０を付勢する。従
つて端子Ｆの電圧が高い程端子Ｂには早く電圧が
生じ、ホトサイリスタ９を介してサイリスタ６を
導通し、ヒータ２を通電する。なお図示はしてい
ないが、定着器に取付けたサーミスタ１１と抵抗
Ｒ１０および可変抵抗器VR３と抵抗Ｒ１１のブ
リツジ回路とOPアンプIC５により定着器が所定
温度に達すると、トランジスタＱ１１とＱ８によ
つて基準電圧を極端に上昇せしめ、サイリスタ６
を不導通にする。又CPU回路１０から必要な場
合にその端子Ｉからの信号で同様にサイリスタ６
を不導通にする。 Next, the reference voltage determined by the variable resistor VR2 and the resistors R8 and R9 is connected to the +input terminal of the OP amplifier IC3, and the terminal F is connected to the -input terminal via the resistor R6. Terminal C is connected to line 103, terminal D is connected to terminal E, and a voltage corresponding to the sum of voltages applied to illumination lamp 1 and heater 2 is applied between line 103 and terminal F. A voltage corresponding to the difference between this voltage and the reference voltage is generated at the output terminal of the OP amplifier IC3. OP amplifier IC4 has this voltage at the + input terminal,
- The triangular wave voltage is connected to the input terminal, and the output voltage energizes the transistor Q10. Therefore, the higher the voltage at the terminal F, the faster the voltage is generated at the terminal B, conducts the thyristor 6 via the photothyristor 9, and energizes the heater 2. Although not shown, when the fuser reaches a predetermined temperature by the bridge circuit of the thermistor 11, resistor R10, variable resistor VR3, and resistor R11 attached to the fuser, and the OP amplifier IC5, the temperature is increased by the transistors Q11 and Q8. By raising the reference voltage extremely, thyristor 6
becomes non-conductive. Also, if necessary from the CPU circuit 10, the thyristor 6 is activated by a signal from its terminal I.
becomes non-conductive.
次に定着器が一定温度以下に低下すると、サー
ミスタ１１はその抵抗値を増大せしめるので、
OPアンプIC６の出力が無くなり、端子Ｊを通し
てCPU回路１０にOFF信号を送るので、CPU回
路１０は複写運転を停止する。ただしその際に端
子Ｉからは信号を出さないので、ヒータ２は通電
し、再び一定温度になると複写運転を再開する。 Next, when the temperature of the fixing device drops below a certain level, the thermistor 11 increases its resistance value.
Since the output of the OP amplifier IC 6 disappears and an OFF signal is sent to the CPU circuit 10 through the terminal J, the CPU circuit 10 stops the copying operation. However, since no signal is output from the terminal I at this time, the heater 2 is energized, and when the temperature reaches a certain level again, the copying operation is resumed.
上述したように露光工程では照明ランプ１に一
定の照度になるように電力を供給し、あらかじめ
定めた消費電力の内照明ランプ１の消費電力の残
りを定着器のヒータ２に供給するようになつてい
る。 As described above, in the exposure process, power is supplied to the illumination lamp 1 to maintain a constant illuminance, and the remainder of the power consumption of the illumination lamp 1 out of the predetermined power consumption is supplied to the heater 2 of the fixing device. ing.
発明の効果
一般に静電複写機において、加熱定着方式のも
のでは、そのほとんどの消費電力は照明ランプと
定着ヒータが占め、特に定着ヒータは使用当初の
ウオームアツプの為の時間を短縮する為に大きな
容量のものが採用されており、これに照明ランプ
の消費電力が加わると一般家庭用には不向な消費
電力となり勝ちであるが、本発明によれば、照明
ランプの照度を確保しつつ、残り電力で定着ヒー
タを加熱し、しかも照明ランプの通電態様の如何
を問わず、このように消費電力を一定限度内に保
ちながら余剰電力で必要に応じて定着器を加熱す
るので、一般家庭でも十分使用できる消費電力で
かつ露光性能や定着性能を確保できる。特に、照
明ランプの実効電圧を検出する手段に定着ヒータ
の実効電圧を検出する手段を付加した負帰還回路
により定着ヒータに印加する実効電圧を制御する
手段を備え、照明ランプと定着ヒータのそれぞれ
に印加する実効電圧の和をほぼ一定以下にするよ
うにしていることから、1Wのロスもなく電源コ
ンセントの容量を十分に利用でき、たとえ電源電
圧の変動や当然生じる照明ランプの設定電圧のバ
ラツキがあつても厳密に電源コンセントの容量を
越えることはなく、したがつて小容量の電源で高
性能の複写機を提供することができる。Effects of the Invention In general, in electrostatic copying machines that use a heat fixing method, most of the power consumption is consumed by the illumination lamp and fixing heater. However, according to the present invention, while ensuring the illuminance of the lighting lamp, The remaining power is used to heat the fuser heater, and regardless of how the lighting lamps are energized, the power consumption is kept within a certain limit and the fuser is heated as needed with the surplus power, so it can be used even in ordinary homes. Exposure performance and fixing performance can be ensured with sufficient power consumption. In particular, a means for controlling the effective voltage applied to the fuser heater is provided by means of a negative feedback circuit which includes a means for detecting the effective voltage of the fixing heater in addition to a means for detecting the effective voltage of the illumination lamp. Since the sum of the applied effective voltages is kept below a constant level, the capacity of the power outlet can be fully utilized without a 1W loss, and even if there are fluctuations in the power supply voltage or the set voltage of the lighting lamps that naturally occur, Even if there is a problem, the capacity of the power outlet will not be strictly exceeded, and therefore a high-performance copying machine can be provided with a small-capacity power supply.
更に万一低室温時に厚い複写紙が使用され、定
着器の温度が低下した場合は、複写運転を一旦停
止するので、定着不良を生じる事なく単に複写時
間が若干伸びるだけで実用上の支障は生じる事が
ない。 Furthermore, in the unlikely event that thick copy paper is used at a low room temperature and the temperature of the fixing device drops, the copying operation will be temporarily stopped, so there will be no fusing failure and the copying time will simply be slightly extended, but there is no practical problem. Nothing happens.
第１図〜第３図は本発明の一実施例の静電複写
機の部分的電気回路図である。
１……照明ランプ、２……定着ヒータ、３，
４，７……変圧器、５，６……サイリスタ、８，
９……ホトサイリスタ、１０……CPU回路。
1 to 3 are partial electrical circuit diagrams of an electrostatic copying machine according to an embodiment of the present invention. 1...Illumination lamp, 2...Fusing heater, 3,
4, 7...Transformer, 5, 6...Thyristor, 8,
9...Photothyristor, 10...CPU circuit.
Claims (1)
形成してから現像し複写紙に転写し、更に転写さ
れた複写紙をヒータの加熱により定着する静電複
写機であつて、前記照明ランプの実効電圧を検出
する手段と、前記ヒータの実効電圧を検出する手
段を備え、前記照明ランプの実効電圧を検出する
手段の負帰還回路によつて前記照明ランプに印加
する実効電圧をほぼ一定にする制御手段と、前記
照明ランプの実効電圧を検出する手段に前記ヒー
タの実効電圧を検出する手段を付加した負帰還回
路により前記ヒータに印加する実効電圧を制御す
る手段を備え、前記照明ランプと前記ヒータのそ
れぞれに印加する実効電圧の和をほぼ一定以下に
するようにした事を特徴とする静電複写機。1. An electrostatic copying machine that exposes a document to light using an illumination lamp, forms an electrostatic latent image, develops it, transfers it to copy paper, and further fixes the transferred copy paper by heating with a heater, wherein the illumination lamp and a means for detecting an effective voltage of the heater, and a negative feedback circuit of the means for detecting the effective voltage of the illumination lamp keeps the effective voltage applied to the illumination lamp substantially constant. and means for controlling the effective voltage applied to the heater by means of a negative feedback circuit in which a means for detecting the effective voltage of the heater is added to the means for detecting the effective voltage of the illumination lamp. An electrostatic copying machine characterized in that the sum of effective voltages applied to each of the heaters is kept below a substantially constant value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57147957A JPS5937560A (en) | 1982-08-25 | 1982-08-25 | electrostatic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57147957A JPS5937560A (en) | 1982-08-25 | 1982-08-25 | electrostatic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5937560A JPS5937560A (en) | 1984-03-01 |
| JPH041904B2 true JPH041904B2 (en) | 1992-01-14 |
Family
ID=15441901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57147957A Granted JPS5937560A (en) | 1982-08-25 | 1982-08-25 | electrostatic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5937560A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60191277A (en) * | 1984-03-13 | 1985-09-28 | Fuji Xerox Co Ltd | Control method of copying machine |
| JPS61267063A (en) * | 1985-05-22 | 1986-11-26 | Ushio Inc | Driving method for copying machine |
| JPH01281461A (en) * | 1988-05-07 | 1989-11-13 | Fuji Xerox Co Ltd | Recorder and its power distribution system designing method |
| JPH0362080A (en) * | 1989-07-31 | 1991-03-18 | Canon Inc | image forming device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5934307B2 (en) * | 1974-08-20 | 1984-08-21 | キヤノン株式会社 | color copying machine |
| JPS5224949U (en) * | 1975-08-11 | 1977-02-22 | ||
| JPS54167736U (en) * | 1978-05-16 | 1979-11-26 | ||
| JPS5670574A (en) * | 1979-11-15 | 1981-06-12 | Toshiba Corp | Change-over device for varying exposure densities of copying machine |
| JPS5746258A (en) * | 1980-09-05 | 1982-03-16 | Ricoh Co Ltd | Controlling system for electric power of copying machine |
| JPS57124362A (en) * | 1981-01-26 | 1982-08-03 | Ricoh Co Ltd | Electronic photographic copy machine |
| JPS57211164A (en) * | 1981-06-22 | 1982-12-24 | Ricoh Co Ltd | Power controlling method for exposure lamp and fixing heater in copying device |
| JPS58134655A (en) * | 1982-02-05 | 1983-08-10 | Ricoh Co Ltd | Power control method for exposure lamp and fixing heater in copying machine |
-
1982
- 1982-08-25 JP JP57147957A patent/JPS5937560A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5937560A (en) | 1984-03-01 |
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