JPH0634133B2 - Flash fixing device - Google Patents
Flash fixing deviceInfo
- Publication number
- JPH0634133B2 JPH0634133B2 JP59246713A JP24671384A JPH0634133B2 JP H0634133 B2 JPH0634133 B2 JP H0634133B2 JP 59246713 A JP59246713 A JP 59246713A JP 24671384 A JP24671384 A JP 24671384A JP H0634133 B2 JPH0634133 B2 JP H0634133B2
- Authority
- JP
- Japan
- Prior art keywords
- flash
- signal
- voltage
- charging
- flash lamp
- 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
- 238000001514 detection method Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- RDZGDBJFHDKEDD-UHFFFAOYSA-N dcho Chemical compound C1C2=CC=CCC2=C2OC2=C2CC=CC=C21 RDZGDBJFHDKEDD-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
- G03G15/201—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters of high intensity and short duration, i.e. flash fusing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は，トナーをフラッシュランプの閃光エネルギー
で熱定着するフラッシュ定着装置に係り，特に前記フラ
ッシュ定着装置に使用するフラッシュランプの点灯状態
を正確にチェックするフラッシュ定着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash fixing device for thermally fixing toner with flash energy of a flash lamp, and more particularly, to accurately determine a lighting state of a flash lamp used in the flash fixing device. Check the flash fixing device.
一般にフラッシュ定着装置は，第３図に示すように現像
機１によりトナー２を記録体３の上に乗せ，静電潜像を
可視像化した後，記録体３をフラッシュランプ４と反射
板５からなる定着部６に導き，フラッシュランプ４を閃
光発光させ，この閃光エネルギーによりトナー２を記録
体３に定着させる。Generally, in a flash fixing device, as shown in FIG. 3, toner 2 is placed on a recording body 3 by a developing machine 1 to visualize an electrostatic latent image, and then the recording body 3 is covered with a flash lamp 4 and a reflection plate. The flash lamp 4 is caused to emit flash light, and the toner 2 is fixed to the recording body 3 by the flash light energy.
上記のようなフラッシュランプ４による熱定着法は，予
熱の必要が無いこと，記録紙の発火の恐れが無いこと，
機構が簡単なこと等優れた特長を有する。The heat fixing method using the flash lamp 4 as described above does not require preheating, there is no fear of ignition of the recording paper,
It has excellent features such as a simple mechanism.
しかし，フラッシュミスによる定着ミスが発生すると，
定着結果を目で見ただけでは定着不良か否かが判らない
ため，例えば，定着が正常に行われたとして印刷データ
を消去した後に，定着不良であることに気付いた場合，
再度印刷データを得るための計算を行わねばならず，非
常に時間の無駄となる。However, if a fixing error occurs due to a flash error,
Since it is not possible to determine whether or not the fixing is defective only by visually observing the fixing result, for example, when the fixing is normally performed and the print data is erased and then the fixing is found to be defective,
The calculation for obtaining the print data must be performed again, which is a very waste of time.
従って，フラッシュのチェックが必要であり，かかるフ
ラッシュチェックを簡易な方式で，しかも正確に確実に
行う方式の実用化が望まれる。Therefore, it is necessary to check the flash, and it is desired to put into practical use a method for performing such a flash check simply and accurately and surely.
第４図は従来のフラッシュランプ点灯チェック方式を示
すブロックダイヤグラム，第５図は従来のフラッシュミ
スチェックタイミング図をそれぞれ示す。FIG. 4 is a block diagram showing a conventional flash lamp lighting check system, and FIG. 5 is a conventional flash miss check timing diagram.
商用電源であるA.C 200Vをスイッチング回路７でスイッ
チングし，高圧トランスT1で所定の高電圧に昇圧し，こ
れを高圧整流回路９で整流してフラッシュランプ４の充
電コンデンサC1を定電流で充電する。尚第５図(1)はコ
ンデンサC1の充放電状況を示す。AC 200V, which is a commercial power source, is switched by the switching circuit 7, boosted to a predetermined high voltage by the high voltage transformer T1, rectified by the high voltage rectifier circuit 9, and the charging capacitor C1 of the flash lamp 4 is charged with a constant current. Incidentally, FIG. 5 (1) shows the charging / discharging state of the capacitor C1.
コンデンサC1への充電はある基準電圧VFになるまで充電
動作を行う。又この充電動作は充電信号CHONを受けた充
電制御回路８にて制御される。The capacitor C1 is charged until it reaches a certain reference voltage VF. The charging operation is controlled by the charging control circuit 8 which receives the charging signal CHON.
即ち，充電を開始してコンデンサC1への充電電圧がある
基準電圧VFに達したことを抵抗器R3,R4 の中間から引き
込んだ電圧で検知した充電制御回路８は，スイッチング
回路７を制御してA.C 200Vの入力を遮断して充電動作を
停止する。That is, the charge control circuit 8 which detects that the charging voltage to the capacitor C1 has reached a certain reference voltage VF by the voltage drawn from the middle of the resistors R3 and R4 controls the switching circuit 7 Shut off the input of AC200V and stop the charging operation.
一方，充電電圧が電圧V1を越えるとコンペア回路10から
充電完了信号CHOKを出力する。即ち，コンペア回路10に
抵抗器R1,R2 の中間から充電電圧を引き込み，基準とな
る電圧V1とでコンペア回路10で比較して，一致すれば充
電完了信号CHOKを出力する。On the other hand, when the charging voltage exceeds the voltage V1, the compare circuit 10 outputs the charging completion signal CHOK. That is, the charging voltage is drawn into the compare circuit 10 from the middle of the resistors R1 and R2, compared with the reference voltage V1 in the compare circuit 10, and if they match, the charging completion signal CHOK is output.
この状態でトリガ信号TRG が与えられると，サイリスタ
SCR がオンとなり，コンデンサC2に充電されている電圧
がトリガコイルT2で昇圧されて，その電圧がフラッシュ
ランプ４のトリガコイルT2に供給され，フラッシュラン
プ４を点灯する。When the trigger signal TRG is applied in this state, the thyristor
The SCR is turned on, the voltage charged in the capacitor C2 is boosted by the trigger coil T2, the voltage is supplied to the trigger coil T2 of the flash lamp 4, and the flash lamp 4 is turned on.
フラッシュランプ４が点灯した瞬間，電流コイルCT（点
線○印で示す。）から得られる電流変化を電流検出回路
11で検出し，これにより電流検出回路11は，電流検出信
号FLSH（即ち，フラッシュランプ点灯確認信号）を図示
していない制御部へ出力する。At the moment when the flash lamp 4 is turned on, the current change obtained from the current coil CT (marked with a dotted line ○) is detected by the current detection circuit.
The current detection circuit 11 outputs the current detection signal FLSH (that is, the flash lamp lighting confirmation signal) to a control unit (not shown).
尚第５図に示すチェック信号CHEFF は充電信号CHONの立
下り時，つまり充電動作終了時充電完了信号CHOKが“ハ
イ”である時セットされる信号である。又，トリガ信号
TRG が与えられて電流検出信号FLSHが検出されると，チ
ェック信号CHEFF はリセットされる。The check signal CHEFF shown in FIG. 5 is a signal that is set when the charging signal CHON falls, that is, when the charging completion signal CHOK is "high" at the end of the charging operation. Also, the trigger signal
When TRG is applied and the current detection signal FLSH is detected, the check signal CHEFF is reset.
又，フラッシュミス信号FLMIS は，チェックタイミング
CHSTB の期間にチェック信号CHEFF が“ロウ”，つまり
リセットされている場合はセットされず，正常にフラッ
シュ動作が行われたことを示し，逆に，信号CHEFF が
“ハイ”，つまり信号FLSHが検出されなかつ時は，信号
FLMIS がセットされフラッシュミスが発生したと判断す
る。Also, the flash miss signal FLMIS has a check timing.
During the CHSTB period, the check signal CHEFF is "low", that is, it is not set when reset, indicating that the flash operation has been performed normally. Conversely, the signal CHEFF is "high", that is, the signal FLSH is detected. When not done, signal
It is determined that FLMIS is set and a flash miss has occurred.
尚これらの信号，即ち充電信号CHON，トリガ信号TRG ，
チェック信号CHEFF ，チェックタイミング信号CHSTB ，
充電完了信号CHOK，電流検出信号FLSH，フラッシュミス
信号FLMIS （第５図に示す(L) は“ロウ”を示す）等は
図示してない制御部にて発生出力したり，受信処理され
るものとする。Incidentally, these signals, that is, the charging signal CHON, the trigger signal TRG,
Check signal CHEFF, check timing signal CHSTB,
A charge completion signal CHOK, a current detection signal FLSH, a flash miss signal FLMIS ((L) in FIG. 5 indicates "low"), etc. are generated and output by a control unit (not shown), and are received and processed. And
上記方法，即ち電流コイルCTから得られる電流変化を電
流検出回路11で検出し，これにより電流検出回路11が出
力する電流検出信号FLSHは電流パルス信号であり，この
電流パルス信号のパルス幅は数100 μｓと狭くかつ不安
定であるためノイズとの区別がつき難い。The above method, that is, the current change obtained from the current coil CT is detected by the current detection circuit 11, and the current detection signal FLSH output by the current detection circuit 11 is a current pulse signal, and the pulse width of this current pulse signal is several Since it is narrow and unstable at 100 μs, it is difficult to distinguish it from noise.
従って，制御部（図示してない）では第５図で図示する
ごとく誤って検出してしまうと言う問題点があった。Therefore, there is a problem that the control unit (not shown) erroneously detects it as shown in FIG.
上記問題点の解決は、フラッシュランプの点灯電圧を充
電させる電圧回路と、前記充電電圧を放電させてフラッ
シュランプを点灯させるトリガ回路と、前記充電電圧が
第１の基準値以上であることを検出する第１の検出手段
と、前記充電電圧が第２の基準値以下であることを検出
する第２の検出手段とを備え、前記第１および第２の検
出手段の検出結果で該フラッシュランプの点灯状態をチ
ェックすることを特徴とするフラッシュ定着装置により
達成される。To solve the above problems, a voltage circuit for charging a lighting voltage of a flash lamp, a trigger circuit for discharging the charging voltage to light a flash lamp, and detecting that the charging voltage is equal to or higher than a first reference value are detected. And a second detecting means for detecting that the charging voltage is less than or equal to a second reference value, and the flash lamp of the flash lamp is detected based on the detection results of the first and second detecting means. This is achieved by a flash fixing device characterized by checking the lighting state.
即ち，フラッシュランプのフラッシュ後の充電電圧は，
略ゼロに近い値に低下することに着目利用して，フラッ
シュ前の充電完了を表示する信号と，フラッシュ後の放
電完了を表示する信号とをチェックすることで，該フラ
ッシュランプの点灯状態の確認を簡易な回路構成で確実
に行うことを可能にした。That is, the charging voltage of the flash lamp after flashing is
Checking the signal indicating the completion of charging before flashing and the signal indicating the completion of discharging after flashing, paying attention to the fact that the value drops to a value close to zero, and confirming the lighting state of the flash lamp. With a simple circuit configuration, it is possible to perform reliably.
以下本発明の要旨を第１図，第２図に示す実施例により
具体的に説明する。The gist of the present invention will be specifically described below with reference to the embodiments shown in FIGS.
第１図は本発明に係るフラッシュランプ点灯チェック方
式の一実施例を示すブロックダイヤグラム，第２図は本
発明に係るフラッシュランプ点灯チェック方式でのフラ
ッシュミスチェックタイミング図をそれぞれ示す。FIG. 1 is a block diagram showing an embodiment of a flash lamp lighting check system according to the present invention, and FIG. 2 is a flash miss check timing chart in the flash lamp lighting check system according to the present invention.
次に，本実施例の動作を本発明に係る部分を主体にして
説明する。尚全図を通じて同一符号は同一対象物を示
す。Next, the operation of the present embodiment will be described mainly with respect to the portion related to the present invention. The same reference numerals denote the same objects throughout the drawings.
本実施例の放電完了信号DCHOK は，コンデンサC1の充電
電圧がフラッシュランプ点灯時，つまり放電開始後所定
電圧（例えば，数V 相当）までに下がった時得られる信
号であり，その基準となる電圧をV2とする。The discharge completion signal DCHOK according to the present embodiment is a signal obtained when the charging voltage of the capacitor C1 is reduced to a predetermined voltage (e.g., several volts) after the flash lamp is lit, that is, the discharge, and is a reference voltage. Is V2.
即ち，コンペア回路12は抵抗器R7,R2 の中間から引き込
んだ電圧を基準電圧V2と比較して一致すれば放電完了信
号DCHOK を制御部（図示していない）へ送出し，コンペ
ア回路10から出力する充電完了信号CHOKと，この放電完
了信号DCHOK とでフラッシュランプ点灯状態をチェック
する。That is, the compare circuit 12 compares the voltage drawn from the middle of the resistors R7 and R2 with the reference voltage V2, and if they match, sends the discharge completion signal DCHOK to the control unit (not shown) and outputs from the compare circuit 10. Check the flash lamp lighting status with the charge completion signal CHOK and the discharge completion signal DCHOK.
尚，第２図に示すチェック信号CHEFF のセット方法は，
充電信号CHONの立ち下り時，充電完了信号CHOK及び放電
完了信号DCHOK が共に“ハイ”である時セットされ，チ
ェックタイミングCHSTB の立ち下がり時リセットされ
る。The check signal CHEFF setting method shown in FIG.
It is set when the charge completion signal CHOK and the discharge completion signal DCHOK are both "high" at the falling edge of the charging signal CHON and reset at the falling edge of the check timing CHSTB.
そして，このチェックタイミングCHSTB の期間に，チェ
ック信号CHEFF が“ハイ”，放電完了信号DCHOK が“ロ
ウ”であることをチェックする。もし，このチェック期
間中チェック信号CHEFF が“ハイ”，放電完了信号DCHO
K が“ハイ”であれば，フラッシュミス信号FLMIS をセ
ットし，フラッシュミスが発生したと判断する。Then, it is checked that the check signal CHEFF is "high" and the discharge completion signal DCHOK is "low" during the check timing CHSTB. If the check signal CHEFF is "high" during this check period and the discharge completion signal DCHO
If K is high, the flash miss signal FLMIS is set and it is determined that a flash miss has occurred.
以上のような本発明によれば，簡易な回路構成で正確な
フラッシュランプ点灯チェックが行えると言う効果があ
る。According to the present invention as described above, there is an effect that an accurate flash lamp lighting check can be performed with a simple circuit configuration.
第１図は本発明に係るフラッシュ定着装置の一実施例を
示すブロックダイヤグラム， 第２図は本発明に係るフラッシュ定着装置でのフラッシ
ュミスチェックタイミング図， 第３図はフラッシュ定着装置の概要図， 第４図は従来のフラッシュ定着装置を示すブロックダイ
ヤグラム， 第５図は従来のフラッシュミスチェックタイミング図， をそれぞれ示す。 図において， １は現像機，２はトナー， ３は記録体，４はフラッシュランプ， ５は反射板，６は定着部， ７はスイッチング回路，８は充電制御回路， ９は高圧整流回路，10,12 はコンペア回路， 11は電流検出回路， をそれぞれ示す。FIG. 1 is a block diagram showing an embodiment of a flash fixing device according to the present invention, FIG. 2 is a timing chart of flash miss check in the flash fixing device according to the present invention, and FIG. 3 is a schematic diagram of the flash fixing device. FIG. 4 is a block diagram showing a conventional flash fixing device, and FIG. 5 is a conventional flash miss check timing diagram. In the figure, 1 is a developing machine, 2 is toner, 3 is a recording medium, 4 is a flash lamp, 5 is a reflector, 6 is a fixing unit, 7 is a switching circuit, 8 is a charge control circuit, 9 is a high-voltage rectifier circuit, and 10 , 12 is a compare circuit, and 11 is a current detection circuit.
Claims (1)
電圧回路と、 前記充電電圧を放電させてフラッシュランプを点灯させ
るトリガ回路と、 前記充電電圧が第１の基準値以上であることを検出する
第１の検出手段と、 前記充電電圧が第２の基準値以下であることを検出する
第２の検出手段とを備え、前記第１および第２の検出手
段の検出結果で該フラッシュランプの点灯状態をチェッ
クすることを特徴とするフラッシュ定着装置。1. A voltage circuit for charging a lighting voltage of a flash lamp, a trigger circuit for discharging the charging voltage to light a flash lamp, and a circuit for detecting that the charging voltage is equal to or higher than a first reference value. No. 1 detection means and second detection means for detecting that the charging voltage is less than or equal to a second reference value, and the flash lamp lighting state based on the detection results of the first and second detection means. A flash fixing device characterized by checking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59246713A JPH0634133B2 (en) | 1984-11-21 | 1984-11-21 | Flash fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59246713A JPH0634133B2 (en) | 1984-11-21 | 1984-11-21 | Flash fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61129673A JPS61129673A (en) | 1986-06-17 |
| JPH0634133B2 true JPH0634133B2 (en) | 1994-05-02 |
Family
ID=17152534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59246713A Expired - Lifetime JPH0634133B2 (en) | 1984-11-21 | 1984-11-21 | Flash fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634133B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7609988B2 (en) | 2003-12-08 | 2009-10-27 | Ricoh Company, Ltd. | Heater, fixing unit and image forming apparatus having power supplied from chargeable auxiliary power supplying unit varied per unit time |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56123559A (en) * | 1980-03-05 | 1981-09-28 | Ricoh Co Ltd | Safety device for copy machine using flash lamp |
| JPS59166981A (en) * | 1983-03-14 | 1984-09-20 | Ricoh Co Ltd | Flash fixing device |
-
1984
- 1984-11-21 JP JP59246713A patent/JPH0634133B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61129673A (en) | 1986-06-17 |
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