JPH0215073B2 - - Google Patents
Info
- Publication number
- JPH0215073B2 JPH0215073B2 JP57195541A JP19554182A JPH0215073B2 JP H0215073 B2 JPH0215073 B2 JP H0215073B2 JP 57195541 A JP57195541 A JP 57195541A JP 19554182 A JP19554182 A JP 19554182A JP H0215073 B2 JPH0215073 B2 JP H0215073B2
- Authority
- JP
- Japan
- Prior art keywords
- flash
- current
- fixing device
- flash lamp
- 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 5
- 238000001454 recorded image Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001678 irradiating effect Effects 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)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Fixing For Electrophotography (AREA)
Description
【発明の詳細な説明】
(A) 発明の技術分野
本発明は、記録媒体表面に得られたトナー像を
定着するための定着装置に関し、とくにフラツシ
ユランプの閃光により定着を行う定着装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION (A) Technical Field of the Invention The present invention relates to a fixing device for fixing a toner image obtained on the surface of a recording medium, and particularly to a fixing device that performs fixing by flashing light from a flash lamp.
(B) 技術の背景
電子写真や、静電記録は感光ドラム表面に静電
潜像を形成した後、この潜像形成領域に形成され
た潜像をトナーを用いて現像する。このトナー像
を記録媒体に転写するが、この状態ではトナー粒
子は、媒体表面に完全には固着しておらず機械的
振動により容易に離脱するのでトナー粒子を熱に
より溶融して定着させる必要がある。(B) Background of the technology In electrophotography and electrostatic recording, an electrostatic latent image is formed on the surface of a photosensitive drum, and then the latent image formed in the latent image forming area is developed using toner. This toner image is transferred to a recording medium, but in this state the toner particles are not completely adhered to the surface of the medium and are easily separated by mechanical vibration, so it is necessary to fuse the toner particles with heat to fix them. be.
トナーの加熱はトナー粒子を溶融せしめるに十
分な熱を与えれば良く、記録媒体の加熱を出来る
限り防止することが望ましい。 The toner may be heated by applying enough heat to melt the toner particles, and it is desirable to prevent heating of the recording medium as much as possible.
(C) 従来技術と問題点
このため従来はフラツシユランプの閃光を用い
て、その光エネルギーによりトナー粒子を溶融
し、定着を行つていた。(C) Prior Art and Problems For this reason, in the past, flash light from a flash lamp was used to fuse toner particles with the light energy and fix the toner particles.
このフラツシユランプの閃光は記録媒体の加熱
効果は殆んどなくトナー粒子の溶融にその光エネ
ルギーが用いられるため定着時における媒体の熱
による反り、焼けがない。 The flashing light from the flash lamp has almost no heating effect on the recording medium, and the light energy is used to melt the toner particles, so there is no warping or burning of the medium due to heat during fixing.
この場合、定着操作が行われたか否かはフラツ
シユランプの閃光を検出することにより判定して
いたが、フラツシユランプの閃光を確認する方法
として、光学式検出方法があるが、フラツシユラ
ンプは、定着を目的とした熱源であるので、耐熱
の問題を解決しなければならない。又、フラツシ
ユランプを複数本使用した場合、どのランプの閃
光不良なのか判断しづらい。 In this case, whether or not the fusing operation was performed was determined by detecting the flash of the flash lamp. is a heat source for the purpose of fixing, so the problem of heat resistance must be solved. Furthermore, when multiple flash lamps are used, it is difficult to determine which lamp is causing the flash failure.
(D) 発明の目的
本発明はかかる従来の欠点に鑑みなされたもの
で、正確にフラツシユランプの閃光の有無を確認
でき、かつ閃光時のエネルギー供給量を確認でき
る定着装置を提供することを目的とする。(D) Purpose of the Invention The present invention was made in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a fixing device that can accurately confirm the presence or absence of a flash from a flash lamp and also confirm the amount of energy supplied at the time of flash. purpose.
(E) 発明の構成
そしてこの目的は本発明によれば記録媒体に形
成された記録像をフラツシユランプ閃光照射によ
り該記録像を前記記録媒体に、熱定着せしめる定
着装置において、前記フラツシユランプの駆動源
から該フラツシユランプへ供給される電流を検出
する電流検出部を設けたことを特徴とする定着装
置を提供することにより達成される。(E) Structure of the Invention According to the present invention, the present invention provides a fixing device for thermally fixing a recorded image formed on a recording medium to the recording medium by irradiating the recorded image with flash light from a flash lamp. This is achieved by providing a fixing device characterized in that it is provided with a current detection section that detects the current supplied from the drive source to the flash lamp.
(E) 発明の実施例
以下図面を参照して本発明の実施例を詳述す
る。電源１の出力端子１ａ，１ｂおよび１ｃ，１
ｄから供給される電流によりコンデンサ２，２′
の両端に電圧Vaが生じるまで充電される。(E) Embodiments of the invention Examples of the invention will be described in detail below with reference to the drawings. Output terminals 1a, 1b and 1c, 1 of power supply 1
The current supplied from d causes capacitors 2, 2'
is charged until a voltage Va is generated across it.
フラツシユランプ４および４′はトリガ電極５，
５′にトリガが与えられると放電々流i1，i2が流れ
閃光する。 The flash lamps 4 and 4' have trigger electrodes 5,
When a trigger is applied to 5', discharge currents i 1 and i 2 flow and flash.
コンデンサ２，２′に蓄えられるエネルギーＷ
は次式で表わされる。 Energy W stored in capacitors 2 and 2'
is expressed by the following equation.
Ｗ＝１／２CVa2＝１／２ Q2／Ｃ
＝１／2C〔∫0 1/f 0idt〕2(J) ……(1)
Ｃ；コンデンサの静電容量〔Ｆ〕
Va； 〃 の充電電圧〔Ｖ〕
Ｑ； 〃 の電荷量 〔Ｃ〕
１／ｆ；フラツシユ繰り返し周期〔Ｓ〕
ｉ；放電電流〔Ａ〕
放電々流i1，i2は電流検出用電流トランス６，
６′により検出される。 W = 1/2CVa 2 = 1/2 Q 2 /C = 1/2C [∫ 0 1/f 0 idt] 2 (J) ...(1) C; Capacitance of capacitor [F] Va; Charge voltage [V] Q; Charge amount [C] 1/f; Flash repetition period [S] i; Discharge current [A] Discharge currents i 1 and i 2 are the current transformer 6 for current detection,
6'.
つまり電流トランス６，６′には誘起電流i1′，
i2′が得られるのでこれを電流―電圧変換回路７，
７′に入力し、電圧出力を得る。 In other words, the current transformers 6 and 6' have induced currents i 1 ',
Since i 2 ' is obtained, this is converted into the current-voltage conversion circuit 7,
7' to obtain voltage output.
この出力電圧を積分回路８，８′、２乗回路９，
９′、増幅回路１０，１０′を通すことにより、コ
ンデンサエネルギーＷが求められる。 This output voltage is applied to integrating circuits 8, 8', square circuit 9,
9' and amplifier circuits 10 and 10', the capacitor energy W is determined.
このエネルギー値Ｗが規定値Ｗ＝1/2CVa2であ
るか否かはコンパレータ１１ａ，１１ｂおよび１
１a′，１１b′により判定される。 Comparators 11a, 11b and 1 determine whether this energy value W is the specified value W=1/ 2CVa2 .
Determined by 1a' and 11b'.
コンパレータ１１ａ，１２ａの入力端子１１
a′，１２a′には入力値WfHを与え、コンパレータ
１１ｂ，１２ｂの入力端子１１b′，１２b′には入
力値WfLを与える。コンパレータ１１ａ，１２
ａは、W1＞WfHのとき出力が論理“１”にな
り、コンパレータ１１ｂ，１２ｂはW1＜WfLの
とき出力が論理“１”になる。コンパレータ１１
ａ及び１１ｂの出力がそれぞれOR回路１３に接
続されているので出力端子１４には、WfL≦W1
≦WfHの範囲を外れたとき論理“１”となる。
出力端子１４の信号が論理“１”になると、フラ
ツシユランプ４の回路が、電源１又は、フラツシ
ユランプ４又は、コンデンサ２の充電及びフラツ
シユランプの閃光を制御している上位の制御装置
の異常ということで上位の制御装置に通知され
る。同様に出力端子１５も同じである。 Input terminal 11 of comparators 11a and 12a
An input value WfH is given to a' and 12a', and an input value WfL is given to input terminals 11b' and 12b' of comparators 11b and 12b. Comparators 11a, 12
When W 1 >WfH, the output of a becomes logic "1", and the output of comparators 11b and 12b becomes logic "1" when W 1 <WfL. Comparator 11
Since the outputs of a and 11b are connected to the OR circuit 13, the output terminal 14 has WfL≦W 1
When it is out of the range of ≦WfH, it becomes logic “1”.
When the signal at the output terminal 14 becomes logic "1", the circuit of the flash lamp 4 is activated by the power source 1, the flash lamp 4, or the upper control device controlling the charging of the flash lamp 4 or the capacitor 2 and the flashing of the flash lamp. The higher-level control device is notified of the abnormality. Similarly, the output terminal 15 is also the same.
前記のように、本発明は、フラツシユランプの
放電電流を検出することにより閃光の有無及び閃
光時のエネルギー供給量が適正であるかを簡単に
確認できる。図は、フラツシユランプが２本の場
合の例を示したが、ｎ本の場合も同様に確認でき
る。又、図の電流検出器に電流トランスを用いた
が、電流トランス６と電流―電圧変換回路７の代
りにホール効果素子と増幅器を用いれば、同様の
電流検出器が構成できる。 As described above, in the present invention, by detecting the discharge current of the flash lamp, it is possible to easily confirm whether there is a flash and whether the amount of energy supplied during the flash is appropriate. Although the figure shows an example in which there are two flash lamps, the same can be confirmed in the case where there are n flash lamps. Further, although a current transformer is used in the current detector shown in the figure, a similar current detector can be constructed by using a Hall effect element and an amplifier in place of the current transformer 6 and current-voltage conversion circuit 7.
(G) 発明の効果
以上説明したように本発明に係るフラツシユ定
着装置は、フラツシユランプの放電々流を検出す
ることにより閃光の有無及び閃光時のエネルギー
供給量が適正か否かを検知できるため、定着操作
が行われたか否かそして、所要の光エネルギーが
供給されたか否か容易に検知できる。(G) Effects of the Invention As explained above, the flash fixing device according to the present invention can detect the presence or absence of a flash and whether or not the amount of energy supplied at the time of flash is appropriate by detecting the discharge current of the flash lamp. Therefore, it is possible to easily detect whether a fixing operation has been performed and whether the required light energy has been supplied.
図は本発明の実施例構成図を示す。
１：電源、２，２′：コンデンサ、４，４′：フ
ラツシユランプ、６，６′：電流検出用トランス、
７，７′：電流電圧変換回路、８，８′：積分回
路、９，９′：２乗回路、１０，１０′：増幅回
路、１１ａ，１１ｂ，１２ａ，１２ｂ：コンパレ
ータ、１３，１３′：OR回路、１４，１５：出
力端子。
The figure shows a configuration diagram of an embodiment of the present invention. 1: Power supply, 2, 2': Capacitor, 4, 4': Flash lamp, 6, 6': Current detection transformer,
7, 7': Current-voltage conversion circuit, 8, 8': Integrating circuit, 9, 9': Square circuit, 10, 10': Amplifying circuit, 11a, 11b, 12a, 12b: Comparator, 13, 13': OR circuit, 14, 15: Output terminal.
Claims (1)
ンプの閃光照射により該記録像を前記記録媒体
に、熱定着せしめる定着装置において、前記フラ
ツシユランプの駆動源から該フラツシユランプへ
供給される電流を検出する電流検出部を設けたこ
とを特徴とする定着装置。 ２ 前記電源検出部の出力を受け、前記フラツシ
ユランプに供給されるエネルギー値を算出するエ
ネルギー算出部を設けたことを特徴とする特許請
求の範囲第１項記載の定着装置。[Scope of Claims] 1. In a fixing device that thermally fixes a recorded image formed on a recording medium by flash irradiation from a flash lamp, the flash is A fixing device comprising a current detection section that detects a current supplied to a lamp. 2. The fixing device according to claim 1, further comprising an energy calculation section that receives the output of the power supply detection section and calculates a value of energy supplied to the flash lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19554182A JPS5984276A (en) | 1982-11-08 | 1982-11-08 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19554182A JPS5984276A (en) | 1982-11-08 | 1982-11-08 | Fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5984276A JPS5984276A (en) | 1984-05-15 |
| JPH0215073B2 true JPH0215073B2 (en) | 1990-04-10 |
Family
ID=16342805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19554182A Granted JPS5984276A (en) | 1982-11-08 | 1982-11-08 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5984276A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654158U (en) * | 1993-01-07 | 1994-07-22 | 第二しなのポリマー株式会社 | Dimmable illuminated pushbutton switch cover member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561074A (en) * | 1979-06-19 | 1981-01-08 | Ricoh Co Ltd | Flash fixing device of electrophotographic copier |
| JPS5743397A (en) * | 1980-08-28 | 1982-03-11 | Ricoh Kk | Flash lamp power source |
-
1982
- 1982-11-08 JP JP19554182A patent/JPS5984276A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561074A (en) * | 1979-06-19 | 1981-01-08 | Ricoh Co Ltd | Flash fixing device of electrophotographic copier |
| JPS5743397A (en) * | 1980-08-28 | 1982-03-11 | Ricoh Kk | Flash lamp power source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654158U (en) * | 1993-01-07 | 1994-07-22 | 第二しなのポリマー株式会社 | Dimmable illuminated pushbutton switch cover member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5984276A (en) | 1984-05-15 |
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