JPS60122977A - Roller fixing device of copying machine - Google Patents
Roller fixing device of copying machineInfo
- Publication number
- JPS60122977A JPS60122977A JP22996983A JP22996983A JPS60122977A JP S60122977 A JPS60122977 A JP S60122977A JP 22996983 A JP22996983 A JP 22996983A JP 22996983 A JP22996983 A JP 22996983A JP S60122977 A JPS60122977 A JP S60122977A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- copying machine
- fixing device
- pressure contact
- copy
- 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
- G03G15/20—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
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
- G03G15/2032—Retractable heating or pressure unit
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、複写機のローラ定着装置に関し、詳しくは、
コピー釦を押すとそれと同時またはそれから所定時間後
に圧接させられて、トナー像の付着した記録紙を挟圧移
送することにょシ記録紙にトナー像を定着させ、所定の
コピーサイクルが終了すると圧接を解放させられる一対
の定着ロー□うを有する複写機のローラ定着装置に関す
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roller fixing device for a copying machine, and in detail,
When the copy button is pressed, it is pressed at the same time or after a predetermined period of time, and the recording paper with the toner image attached is transferred under pressure, fixing the toner image on the recording paper, and when the predetermined copy cycle is completed, the press is pressed. The present invention relates to a roller fixing device for a copying machine having a pair of fixing rows that are released.
上述のような従来のローラ定着装置は、一対の定着ロー
ラの圧接が所定のコピーサイクルが終了すると直ぐに解
放されるようなものであった。したがって、一対の定着
ローラの圧接と解放動作がコピー釦の押し回数だけ繰返
されて、圧接と解放を行う離接機構が損耗し易いと云う
問題があった。In the conventional roller fusing device as described above, the pair of fusing rollers are pressed against each other and are released immediately after a predetermined copy cycle is completed. Therefore, there is a problem in that the pressing and releasing operations of the pair of fixing rollers are repeated as many times as the copy button is pressed, and the contact/separation mechanism that performs the pressing and releasing is likely to wear out.
本発明は、上述のような従来のローラ定着装置の問題を
解消するためになされたものであシ、一対の定着ローラ
の圧接と解放動作がコピー釦の押し回数よりも少なくな
るようなローラ定着装置を提供するものである。The present invention has been made in order to solve the problems of the conventional roller fixing device as described above. It provides equipment.
本発明は、コピー釦を押すとそれと同時またはそれから
所定時間後に圧接させられて、トナー像の付着した記録
紙を挟圧移送することによシ記録紙にトナー像を定着さ
せ、所定のコピーサイクルが終了すると圧接を解放させ
られる一対の定着ローラを有する複写機のローラ定着装
置において、所定のコピーサイクルが終了してから一定
時間内に再びコピー釦が押されるとそのコピーサイクル
が終了するまでは圧接の解放が行われないようにしたこ
とを特徴とする複写機のローラ定着装置にあり、この構
成によって上記目的を達成したものである。In the present invention, when a copy button is pressed, the toner image is fixed on the recording paper by being brought into pressure contact at the same time or after a predetermined period of time, and the recording paper on which the toner image is adhered is transferred under pressure, and the toner image is fixed on the recording paper, and the toner image is fixed on the recording paper, and a predetermined copy cycle is completed. In a roller fixing device of a copying machine, which has a pair of fixing rollers that are released from pressure when the copy cycle ends, if the copy button is pressed again within a certain period of time after the end of a predetermined copy cycle, the fuser roller will be released until the copy cycle ends. A roller fixing device for a copying machine is characterized in that the pressure contact is not released, and this configuration achieves the above object.
以下、図示例を参照して本発明を説明する。 The present invention will be described below with reference to illustrated examples.
第ｉ２は本発明ローラ定着装置の機構の一例を示す概要
断面図、第２図は一対の定着ローラの離接制御回路のブ
ロック図、第３図社複写動作タイムチャートである。Figure i2 is a schematic sectional view showing an example of the mechanism of the roller fixing device of the present invention, Figure 2 is a block diagram of a control circuit for controlling the contact and separation of a pair of fixing rollers, and Figure 3 is a copying operation time chart.
第１図のローラ定着装置は、定着ローラ１が金属ローラ
核の内部に赤外ランプヒータを有してローラ表面にポリ
４弗化エチレンのコーティング層を有する構成からなり
、定着ローラ２が金属ローラ核の表面にシリコンゴム層
を有する構成からなっていて、定着ローラ２が上下して
離接動作を行うものである。The roller fixing device shown in FIG. 1 has a structure in which a fixing roller 1 has an infrared lamp heater inside a metal roller core and a coating layer of polytetrafluoroethylene on the roller surface, and a fixing roller 2 has a structure in which a fixing roller 2 has an infrared lamp heater inside a metal roller core and a coating layer of polytetrafluoroethylene. It has a structure in which a silicone rubber layer is provided on the surface of the core, and the fixing roller 2 moves up and down to perform contact and separation operations.
定着ローラ２は、図示せざるモータ及び減速機によって
レバー軸３が時計方向に回転させられ、それと共に押し
上げレバー４が復元ばね５の付勢に抗して時計方向に回
動して圧接ばね６を介して定着ローラ２の軸受ブラケッ
ト７をブラケット軸８の周りに時計方向に回動させるこ
とＫより定着ローラ１に圧接するようになる。そして、
押し上はレバー４がリミットスイッチ９を作動すると、
モータは駆動を止められて、押し上はレバー４は圧接ば
ね６及び復元ばね５の付勢によって反時計方向に復元回
動するようになるが、係止重工０が押し上げレバー４に
係合して復元回動を止めることＫより、定着ローラ２の
圧接状態は保持される。In the fixing roller 2, the lever shaft 3 is rotated clockwise by a motor and a speed reducer (not shown), and at the same time, the push-up lever 4 is rotated clockwise against the bias of the restoring spring 5, so that the pressure contact spring 6 is rotated. By rotating the bearing bracket 7 of the fixing roller 2 clockwise around the bracket shaft 8 via K, the bearing bracket 7 of the fixing roller 2 comes into pressure contact with the fixing roller 1. and,
When pushing up, lever 4 activates limit switch 9,
The drive of the motor is stopped, and the push-up lever 4 returns to its counterclockwise rotation due to the bias of the pressure contact spring 6 and the restoring spring 5, but the locking heavy equipment 0 engages with the push-up lever 4. By stopping the restoring rotation K, the pressing state of the fixing roller 2 is maintained.
なお、押し上はレバー４が時計方向に回動する際には係
止爪１０は逃がしばね１１によって逃げるから支障を与
えない。Incidentally, when the lever 4 is rotated clockwise, the locking pawl 10 escapes by the release spring 11, so that there is no problem in pushing up.
定着ローラ２の圧接の解放は、電磁石１２の励磁を止め
ることによって、係合解除ばね１３が可動鉄片１４を電
磁石１２の吸着位置から離し、それによって可動鉄片１
４が逃がしばね１１を介して係止爪１０を押し上はレバ
ー４の係止位置から外すから、したがって、押し上はレ
バー４が復元ばね５に引かれて反時計方向に復元回動す
ることにより行われる。なお、レバー軸３とそれを回転
させる減速機の間にクラッチを設けて、そのクラッチの
接続動作が電磁石１２の励磁動作と一緒に行われるよう
にすると、押し上はレバー４の復元回動は、減速機やモ
ータが切り離されて、軽快に行われることになる。１５
は定着ローラ１のクリーニングローラ、１６．１７はそ
れぞれ定着ローラ１，２に記録紙Ｐが巻き付くことを防
止する分離ガイド、１８は記録紙Ｐを定着装置に送り込
むコンベアである。To release the pressure contact of the fixing roller 2, by stopping the excitation of the electromagnet 12, the disengagement spring 13 separates the movable iron piece 14 from the adsorption position of the electromagnet 12, and thereby the movable iron piece 1
4 pushes the locking pawl 10 through the release spring 11 to release the lever 4 from the locking position. Therefore, when pushing up, the lever 4 is pulled by the restoring spring 5 and rotates counterclockwise to recover. This is done by Note that if a clutch is provided between the lever shaft 3 and the speed reducer that rotates it, and the engagement operation of the clutch is performed together with the excitation operation of the electromagnet 12, the restoring rotation of the lever 4 will be prevented. , the speed reducer and motor will be separated and the process will be carried out more easily. 15
1 is a cleaning roller for the fixing roller 1, 16 and 17 are separation guides that prevent the recording paper P from being wrapped around the fixing rollers 1 and 2, and 18 is a conveyor that feeds the recording paper P to the fixing device.
上述のような定着ローラ２の離接動作は、第２図に示し
たような制御回路により、第３図に示したようなタイミ
ングで行われる。The above-described movement of the fixing roller 2 toward and away from the fixing roller 2 is performed by the control circuit shown in FIG. 2 at the timing shown in FIG. 3.
第２図において、複写機の電源スィッチのオンによって
中央処理装置ＣＰＵに電源が接続されると、ＯＰＵは、
コピーボタンが押されたことによって直ちに、または、
タイマーによる所定時間後に１モ一タ駆動回路と電磁石
駆動回路とを作動させて、圧接用のモータを回転させる
と共に電磁石１２を励磁させる。それＫよって、第１図
の押し上げレバー４は時計方向に回動し、係止爪１０は
押し上はレバー４の復元回動を係止する位置を占めるよ
うになる。したがって、先に述べたように、定着ローラ
２が定着ローラ１に圧接して、コンベア１８によって送
り込まれて来た記録紙Ｐを挟圧して矢印で示した回転方
向に送シ、記録紙ＰＫ付着しているトナー像を定着させ
る。圧接用モータの回転は、押し上げレバー４がマイク
ロスイッチ９を作動した時点で、マイクロスイッチ９の
信号によυａｐｕが停止する。In FIG. 2, when the power is connected to the central processing unit CPU by turning on the power switch of the copying machine, the OPU
immediately upon pressing the copy button, or
After a predetermined time set by the timer, the one motor drive circuit and the electromagnet drive circuit are operated to rotate the pressure welding motor and excite the electromagnet 12. As a result, the push-up lever 4 shown in FIG. 1 rotates clockwise, and the locking pawl 10 assumes a position where the push-up lever 4 locks the restoring rotation. Therefore, as described above, the fixing roller 2 comes into pressure contact with the fixing roller 1, pinches the recording paper P fed by the conveyor 18, and feeds the recording paper P in the direction of rotation shown by the arrow, causing the recording paper PK to stick. fixes the toner image. The rotation of the press-contact motor is stopped by a signal from the microswitch 9 when the push-up lever 4 operates the microswitch 9.
所定枚数の最後の記録紙の後端が定着ローラ１゜２の圧
接点を通過すると、図示していない公知のコピーサイク
ル終了信号発生手段がＣＰＵにコピーサイクル終了を伝
え、ＣＰＵはそれからタイマーによる所定時間後に電磁
石１２の励磁を止める。そして、上記所定時間内に次の
複写のだめのコピーボタンが押されると、ＣＰＵ ｄそ
の所定時間を与えるタイマーをリセットして、モータを
回転させ（実際はリミットスイッチ９により殆んど回転
しない。）、電磁石１２の励磁を続けさせる。したがっ
て、上記所定時間内にコピーボタンが押されなければ、
所定時間が経過した時点で第１図の係止爪１０が係止か
ら外れて、定着ローラ２の圧接は解放されるが、コピー
ボタンが押されると、次のコピーサイクル終了まで圧接
が続けられることになる。それによって、定着ローラ２
の離接動作は、コピーボタンの押しが頻繁に行われる場
合、押し回数よりも回数が減少することＫなる。この所
定時間は、長ければ長い程定着ローラ２の離接動作回数
を減少させるが、定着ローラ１，２を回転させないで圧
接させている時間が長くなると定着ローラ１，２０表面
に型がついたり、また定着を行わない間の定着ローラ１
，２の回転と圧接時間が長くなると電力消費が大きくな
ったシするので、３０〜６０秒程度にすることが好まし
い。When the trailing edge of the last recording sheet of the predetermined number of sheets passes the pressure contact point of the fixing roller 1.2, a known copy cycle end signal generating means (not shown) notifies the CPU of the end of the copy cycle, and the CPU then performs a predetermined signal using a timer. After a certain period of time, the excitation of the electromagnet 12 is stopped. Then, when the copy button for the next copy is pressed within the predetermined time, the CPU d resets the timer giving the predetermined time and rotates the motor (actually, it hardly rotates due to the limit switch 9). Continue excitation of the electromagnet 12. Therefore, if the copy button is not pressed within the above predetermined time,
When a predetermined period of time has elapsed, the locking pawl 10 shown in FIG. 1 is released from the lock and the pressure contact of the fixing roller 2 is released, but when the copy button is pressed, the pressure contact continues until the end of the next copy cycle. It turns out. As a result, the fixing roller 2
If the copy button is pressed frequently, the number of times the copy button is pressed is less than the number of times the copy button is pressed. The longer this predetermined time is, the fewer the number of times the fixing roller 2 moves into and out of contact with the fixing roller 2. However, if the time when the fixing rollers 1 and 2 are kept in pressure contact without rotating becomes longer, molds may form on the surfaces of the fixing rollers 1 and 20. , and fixing roller 1 while no fixing is being performed.
, 2 and the pressure contact time increases, the power consumption increases, so it is preferable to set the time to about 30 to 60 seconds.
第３図は、コピーボタンの押しがコピーサイクル終了か
ら所定時間後に行われた場合と、所定時間内に行われた
場合を示しており、ｔｌが所定時間である。また、複写
機の電源スィッチをオフすると電磁石１２の励磁が行わ
れなくなって、それによシ定着セーラ２の圧接は解放さ
れるから、その点も示している。すなわち、電源がオフ
されても定着ローラ２が圧接されたま＼になってそのた
めにローラ表面に型がつくと云うことが防止される。FIG. 3 shows a case where the copy button is pressed after a predetermined time after the end of the copy cycle and a case where the press is performed within a predetermined time, where tl is the predetermined time. Furthermore, when the power switch of the copying machine is turned off, the electromagnet 12 is no longer excited, thereby releasing the pressure contact of the fixing roller 2, so this point is also shown. That is, even when the power is turned off, the fixing roller 2 remains in pressure contact with the fixing roller 2, thereby preventing mold from forming on the roller surface.
本発明によれば、一対の定着ローラは所定のコピーサイ
クルが終了してから再びコピーボタンが押されるまでに
一定時間が経過すると圧接を解放されるから、離接動作
回数がコピーボタンの押し回数よりも減少するようＫな
り、したがって、離接機構の寿命が長くなると云う効果
が得られる。According to the present invention, the pair of fixing rollers is released from pressure contact when a certain period of time elapses from the end of a predetermined copy cycle until the copy button is pressed again. Therefore, the effect of lengthening the life of the separation mechanism can be obtained.
また、図示例によれば、電源をオフしても定着ローラの
圧接が解放されるから、定着ローラの表面に型が付いた
りすることが防止される。Further, according to the illustrated example, even when the power is turned off, the pressure contact of the fixing roller is released, so that it is possible to prevent mold from forming on the surface of the fixing roller.
なお、本発明は図示例Ｋｌａらず、例えば離接機構がプ
ランジャを用いるようなものであってもよいし、また、
制御回路も別に適当に設計できる。It should be noted that the present invention is not limited to the illustrated example K1a; for example, the detachment/separation mechanism may use a plunger, or,
The control circuit can also be designed separately.
第１図は本発明ローラ定着装置の機構の一例を示す概要
断面図、第２図は一対の定着ローラの離接制御回路のブ
ロック図、第３図は複写動作タイムチャートである。
１．２・・・定着ローラ、 ３・・・レバー軸、４・・
・押し上はレバー、 ５・・・復元ばね、６・・・圧接
ばね、 ７・・・軸受ブラケット、８・・・ブラケット
軸、９・・・リミットスイッチ、１０・・・係止爪、
１１・・・逃がしばね、１２・・・電磁石、 １３・・
・係合解除ばね、１４・・・可動鉄片、１５・・・クリ
ーニングローラ、１６ 、１７・・・分離ガイド、１８
・・・コンベア、Ｐ・・・記録紙、 Ｔ・・・トナー像
、ｔＷ・・・タイマー所定時間。
特許出願人 小西六写真工業株式金社
−１−・“FIG. 1 is a schematic cross-sectional view showing an example of the mechanism of the roller fixing device of the present invention, FIG. 2 is a block diagram of a circuit for controlling the contact and separation of a pair of fixing rollers, and FIG. 3 is a copying operation time chart. 1.2... Fixing roller, 3... Lever shaft, 4...
・Lever for pushing up, 5... Restoration spring, 6... Pressure contact spring, 7... Bearing bracket, 8... Bracket shaft, 9... Limit switch, 10... Locking claw,
11...Release spring, 12...Electromagnet, 13...
- Disengagement release spring, 14... Movable iron piece, 15... Cleaning roller, 16, 17... Separation guide, 18
... Conveyor, P ... Recording paper, T ... Toner image, tW ... Timer predetermined time. Patent applicant: Konishiroku Photo Industry Co., Ltd. Kinsha-1-・“
Claims (1)
定時間後に圧接させられて、トナー像の付着した記録紙
を挟圧移送することによシ記録紙にトナー像を定着させ
、所定のコピーサイクルが終了すると圧接を解放させら
れる一対の定着ローラを有する複写機のローラ定着装置
において、所定のコピーサイクルが終了してから一定時
間内に再びコピー釦が押されるとそのコピーサイクルが
終了するまでは圧接の解放が行われないようＫしたこと
を特徴とする複写機のローラ定着装置。 （２〕 特許請求の範囲第１項記載の複写機のローラ定
着装置において、複写機の電源をオフすると前記一対の
ローラの圧接が解放される複写機のローラ定着装置。(1) When the copy button is pressed, it is brought into pressure contact at the same time or after a predetermined period of time, and the recording paper with the toner image adhered to it is conveyed under pressure, thereby fixing the toner image on the recording paper and completing the predetermined copy cycle. In a roller fixing device of a copying machine, which has a pair of fixing rollers that are released from the pressure contact when the copy cycle ends, if the copy button is pressed again within a certain period of time after the end of a predetermined copy cycle, the pressure contact continues until the end of that copy cycle. A roller fixing device for a copying machine, characterized in that a roller fixing device for a copying machine is configured such that the release of the roller is prevented from occurring. (2) A roller fixing device for a copying machine according to claim 1, in which the pressure contact between the pair of rollers is released when the copying machine is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22996983A JPS60122977A (en) | 1983-12-07 | 1983-12-07 | Roller fixing device of copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22996983A JPS60122977A (en) | 1983-12-07 | 1983-12-07 | Roller fixing device of copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60122977A true JPS60122977A (en) | 1985-07-01 |
Family
ID=16900542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22996983A Pending JPS60122977A (en) | 1983-12-07 | 1983-12-07 | Roller fixing device of copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60122977A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02166488A (en) * | 1988-12-20 | 1990-06-27 | Canon Inc | Image forming device |
-
1983
- 1983-12-07 JP JP22996983A patent/JPS60122977A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02166488A (en) * | 1988-12-20 | 1990-06-27 | Canon Inc | Image forming device |
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