JPH0758414B2 - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPH0758414B2 JPH0758414B2 JP61291182A JP29118286A JPH0758414B2 JP H0758414 B2 JPH0758414 B2 JP H0758414B2 JP 61291182 A JP61291182 A JP 61291182A JP 29118286 A JP29118286 A JP 29118286A JP H0758414 B2 JPH0758414 B2 JP H0758414B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- roller
- heating roller
- heating
- pressure roller
- 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
Landscapes
- Fixing For Electrophotography (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
本発明の複写機等の加熱定着装置に係るもので、詳細に
は加熱ローラと該加熱ローラに接触して従動回転する加
熱手段を持たない加圧ローラとを有する定着装置に関す
るものである。The present invention relates to a heat fixing device such as a copying machine of the present invention, and more particularly to a fixing device having a heating roller and a pressure roller having no heating means for rotating in contact with the heating roller.
一般に加熱ローラ定着装置は、加熱ローラと該加熱ロー
ラに接触して従動回転する加圧ローラとによって構成さ
れており、好ましい定着状態を得るために種々の工夫が
なされている。 前記加熱ローラは、ヒータランプ等の加熱手段を内設し
たローラコアの表面にハードテフロンコーティングを施
す等して定着後における転写材の該ローラからの離脱を
容易ならしめている。 前記加圧ローラは、加熱手段の内接していないローラコ
アの表面にPFAチューブやシリコンゴム等の離型性材料
の層を被覆せしめられている。 前記加熱ローラと前記加圧ローラとは互いに接触せしめ
られており、加熱ローラをモータ等の駆動源で駆動する
ことにより、加圧ローラも従動回転するようになってい
る。又、好ましい定着温度を得るため加熱ローラの表面
温度を検知して制御する温度制御器が備えられている。 従来このような定着装置においては、始動時の電源投入
後のウオームアップ期間中は、双方のローラは停止状態
すなわち非回転状態に保たれるようにしたものが多い。
しかし、このような状態は以下に述べるような欠点を有
するものである。 すなわち、加圧ローラはウオームアップ中には非回転状
態で加熱ローラと接触しているので接触部に限っては温
度が上昇するものの、加圧ローラ自体の熱容量が大きく
熱伝導度が悪いため該加圧ローラの他の部分は昇温せず
に室温のまま保たれる。 コピー開始の信号と共にコピーモードによれば、加熱ロ
ーラと加圧ローラとが回転を開始しコピー初期において
は、加熱ローラの熱は転写材上のトナーの熔融には有効
に使われず専ら加圧ローラの温度上昇に費やされるの
で、トナー熔融温度に達するまでの間に定着不良が発生
するという欠点を有する。 このような欠点を排除するために、始動時、電源投入後
のウオームアップ期間中に、常時あるいは一定時間の間
加圧ローラを加熱ローラに従動回転させるようにした定
着器が知られている。 その一方法としては、始動時電源投入後のウオームアッ
プ期間中加圧ローラを加熱ローラに常時従動回転させる
ものである。しかし、この方法においては加熱ローラ自
体の昇温時の当初から一方において加圧ローラを介して
の放熱がおこなわれ、極めて効率が悪く加熱ローラの表
面温度が所定の温度に達するまでに非常に長い時間を要
する。従って、省エネルギーとはならないばかりか、加
圧ローラを加熱ローラに従動回転させる時間が長いこと
によって双方のローラ表面の損傷も発生し易くなり、ロ
ーラ寿命も短くなる。更に回転時に騒音を発する等の欠
点を有するものである。 上記ウオームアップ時常時回転方法を改良した方法とし
て、加熱ローラが所定の温度に達するまで非回転状態を
保ちしかる後に加圧ローラを加熱ローラに従動回転させ
る方法が提案されている。 しかしながら、低室温雰囲気下においてはたとえウオー
ムアップ中に加熱ローラの昇温後加圧ローラを加熱ロー
ラに従動回転させて若干昇温させたとしても、電源を投
入したままコピーを継続することなく放置しておけば加
圧ローラはやがて冷却してしまい接触部近傍のみ温度が
高く他は室温雰囲気下の温度に戻り、一定時間経過後に
おける再開コピーの当初においてはやはり定着不良の発
生を見るので、電源投入後、始動時ウオームアップ期間
中に行う加圧ローラの昇温対策だけでは不完全であるこ
とがわかった。Generally, a heating roller fixing device is composed of a heating roller and a pressure roller that is driven to rotate in contact with the heating roller, and various measures have been taken in order to obtain a preferable fixing state. In the heating roller, the surface of a roller core having a heating means such as a heater lamp provided therein is coated with hard Teflon to facilitate the separation of the transfer material from the roller after fixing. In the pressure roller, the surface of the roller core not inscribed in the heating means is covered with a layer of a releasable material such as PFA tube or silicon rubber. The heating roller and the pressure roller are in contact with each other, and when the heating roller is driven by a drive source such as a motor, the pressure roller also rotates. Further, a temperature controller for detecting and controlling the surface temperature of the heating roller in order to obtain a preferable fixing temperature is provided. In many conventional fixing devices, both rollers are kept in a stopped state, that is, in a non-rotating state during a warm-up period after power-on at start-up.
However, such a state has the following drawbacks. That is, since the pressure roller is in a non-rotating state and is in contact with the heating roller during warm-up, the temperature rises only in the contact portion, but the pressure roller itself has a large heat capacity and poor thermal conductivity. The other parts of the pressure roller are kept at room temperature without being heated. According to the copy mode together with the copy start signal, the heating roller and the pressure roller start rotating, and at the initial stage of copying, the heat of the heating roller is not effectively used for melting the toner on the transfer material, and the pressure roller is exclusively used. However, there is a drawback that fixing failure occurs before the toner melting temperature is reached. In order to eliminate such a defect, there is known a fixing device in which a pressure roller is rotated by a heating roller at all times or for a certain period of time during a warm-up period after power is turned on at startup. One method is to constantly rotate the pressure roller with the heating roller during the warm-up period after the power is turned on at the start. However, in this method, heat is radiated through the pressure roller from the beginning of the temperature rise of the heating roller itself, and the efficiency is extremely low and it takes a very long time for the surface temperature of the heating roller to reach a predetermined temperature. It takes time. Therefore, not only energy is not saved, but also because the time for which the pressure roller is driven and rotated by the heating roller is long, damage to both roller surfaces is likely to occur and the roller life is shortened. Further, it has a drawback that noise is generated during rotation. As a method of improving the above-described constant rotation method during warm-up, a method has been proposed in which the pressure roller is driven to rotate following the heating roller after the non-rotation state is maintained until the temperature reaches a predetermined temperature. However, in a low room temperature atmosphere, even if the pressure roller is driven by the heating roller to slightly raise the temperature after the heating roller is warmed up during warm-up, the power is left on and the copying is not continued. If you do so, the pressure roller will eventually cool and the temperature will be high only in the vicinity of the contact part, and the others will return to the temperature of the room temperature atmosphere, and after the lapse of a certain period of time, you will see the occurrence of defective fixing at the beginning of copying again. It was found that the measures to raise the temperature of the pressure roller during the warm-up period at startup after turning on the power were not sufficient.
本発明は上記の如き従来技術の欠点に鑑みなされたもの
であって、加圧ローラの温度特性を考慮し、たとえ低室
温雰囲気下においても好ましい定着温度を敏速に達成し
て定着不良の発生を防ぐ定着装置の提供を目的とするも
のである。The present invention has been made in view of the above-mentioned drawbacks of the prior art, and in consideration of the temperature characteristics of the pressure roller, a preferable fixing temperature can be quickly achieved even in a low room temperature atmosphere to prevent the occurrence of fixing failure. It is an object of the present invention to provide a fixing device that prevents it.
上記目的は、加熱手段を内設した加熱ローラと、該加熱
ローラに接触して回転し、内部に加熱手段を有しない加
圧ローラとを配置し、この加熱ローラと加圧ローラとの
間に搬送される記録紙の材質によって加熱温度を制御す
るようにした定着装置において、加熱ローラの表面温度
を第１の設定温度と第２の設定温度の二段階に設定制御
する制御回路を設け、通常は第１の設定温度に維持さ
れ、前記加熱ローラと加圧ローラとの間に挿入される記
録紙の材質の変更指示があったとき、前記加熱ローラに
加圧ローラを接触させ、加圧ローラを従動回転させて加
熱し、一定時間経過後、加熱ローラの表面温度を高めの
第２の設定温度にして前記記録紙を定着することを特徴
とする定着装置によって達成される。The above-mentioned object is to arrange a heating roller having a heating means therein and a pressure roller which rotates in contact with the heating roller and which does not have the heating means therein, and between the heating roller and the pressure roller. In the fixing device in which the heating temperature is controlled according to the material of the recording paper to be conveyed, a control circuit for setting and controlling the surface temperature of the heating roller in two stages of the first set temperature and the second set temperature is provided. Is maintained at the first set temperature, and when there is an instruction to change the material of the recording paper inserted between the heating roller and the pressure roller, the pressure roller is brought into contact with the heating roller, Is driven to rotate and heated, and after a lapse of a predetermined time, the surface temperature of the heating roller is raised to a second preset temperature to fix the recording paper.
以下本発明による定着装置の一実施例を第１図乃至第３
図により説明するが本発明の実施の態様がこれにより限
定されるものではない。 まず、複写機における定着装置に至るまでの各工程を簡
単に説明する。 像担持体は導電性金属基板上に光導電性物質が一定の厚
さで積層されたドラム状の感光体であり、回動可能に構
成され一定方向に回転してその光導電面が複数の処理ス
テーション（不図示）を順に通過するようになってい
る。 該像担持体は帯電器により帯電され像担持体の表面は一
様に電荷を保持する。光導電面を一様に帯電せしめられ
た像担持体は回転して露光部に入る。 該露光部では原稿からの反射光がミラー・レンズ等の光
学系を通して像担持体の光導電面に照射され、露光部分
の電荷を放電せしめてその部分に原稿の静電潜像を作
る。静電潜像の形成された像担持体は回転して現像部に
入る。 該現像部において前記静電潜像は現像器により現像さ
れ、荷電トナー粒子を含む現像材料が該潜像に付着して
原稿の原画形状に顕像化せしめられる。 該トナーによって顕像化されたトナー像を担持した像担
持体は回転し転写部に入る。 該転写部では前記トナー像に同期せしめられて記録用紙
が搬送され、該記録用紙にトナー像を転写する。トナー
像を転写された記録用紙は転写紙として分離器により像
担持体から分離され、更に本発明に係る定着装置により
定着されて機外に排紙される。一方分離器で記録用紙と
分離した像担持体は未転写の残留トナーを担持したまま
クリーニング装置に入り、ここで外像担持体上の残留ト
ナーが取り除かれ、新たなコピーサイクルへ突入すべく
準備される。 第１図は本発明に係る定着装置の断面図である。該定着
装置10は、加熱手段15を内設した加熱ローラ11と、該加
熱ローラ11に接する加熱手段15を内設しない加圧ローラ
12と、加熱ローラ11の表面温度を検知する温度検知器13
と、前記加熱ローラ11を回転駆動するモータ14と、前記
加熱ローラ11の表面温度を該温度検知器13で検知した信
号に基づいて一定に維持制御するための温度制御回路を
含むコントローラー16が設けられている。 また、転写材の搬送に関しては未定着の紙等を定着装置
10の加熱ローラ11と加圧ローラ12とのニップ位置へと導
くための規制板である入口案内上ガイド３と入口案内下
ガイド４により案内され、定着された後、分離爪５、６
により分離される。その後、排紙上ガイド７と排紙下ガ
イド８により、排紙ローラユニット９に導かれる。 前記加熱ローラ11は、外形30ミリ、肉厚２ミリ、長さ27
0ミリの金属円筒体に加熱手段15たる900ワットのヒータ
を内設せしめた構成となっており、その表面はハードテ
フロンコーティングが施されてある。 前記加圧ローラ12は、シリコンゴム等の離型性を有する
被覆材料の厚さ５ミリを含んで外形が30ミリ、長さ270
ミリの円筒体をなし、前記加熱ローラ11に圧接して従導
回転するように構成されている。 加圧ローラ12を加熱ローラ11に圧接させて従動回転させ
る機構は、タイマー回路16を含むコントローラーと加熱
ローラ11を回転駆動するモータ14されらに接続されたCP
U等の制御手段17ととにより構成される。この機構にお
いて、制御手段17による記録紙の材質の変旨指示があっ
て、加熱ローラ11の表面温度の第２の設定温度への切り
替えに際し制御手段17により切り替えからモータ14を一
定時間駆動させて加熱ローラ11で加圧ローラ12を従動回
転させる。 本実施例における加圧ローラ12と加熱ローラ11との圧接
部における線速度は毎秒70ミリである。 本発明に係る定着装置は以上のような構成となっており
以下にその動作について説明する。 本実施例による定着装置では加熱ローラ11における昇温
速度が平均して４℃/secである場合、通常状態はコピー
ボタンONによりコピー動作を開始すると同時に加圧ロー
ラ12は加熱ローラ11の回転で従動回転を開始し、加熱ロ
ーラ11は熱を奪われるが２秒後に温度検知器13が検知し
加熱手段15に対する通電が行われ、加熱ローラ11の温度
下降勾配は緩和され、転写紙が双方の圧接部を通過する
時点での該圧接部における温度降下は高々20℃で済み定
着不良は発生しない。 又、例えばはがき等の厚紙やOHP用シート等の特殊紙の
場合、通常の定着に供せられる第１の設定温度よりも高
めに設定した第２の設定温度に切り替える。切り替えた
後、あらかじめ定めた一定の時間加熱ローラ11を加熱手
段15により昇温させつつ加圧ローラ12を該加熱ローラ11
に圧接させて従動回転するように制御される。加熱ロー
ラ11が前記第２の設定温度に達すると前記温度検知器13
が検知し不図示のコントロールパネル上に高温定着が可
能である旨表示する。 前記高温定着の終了の後、一定時間内に高温定着を必要
とするコピーが行われず時間の経過をみた場合や通常定
着を必要とするコピーがおこなわれる場合は前記第１の
設定温度に戻すようにする。 即ち本発明による定着装置では、いわゆる通常状態乃至
待機状態というのは前記第１の設定温度と状態であり、
厚紙や特殊紙の定着の際の第２の設定温度への切り替え
を必要として、切り替えのボタンをおせば必ず加圧ロー
ラ12の加熱ローラ11との従動回転が行われ、高温定着の
ための好ましい定着温度に昇温せしめられるように制御
される。 第２図は本発明の定着装置における高温定着時の加熱ロ
ーラ11と加圧ローラ12との表面温度と時間の関係を示
す。図中の記号Ａは加熱ローラの表面温度、Ｂは加圧ロ
ーラの表面温度、T0は室温又は前記第１の設定温度状態
における加圧ローラ12の表面温度、T1は前記高温定着時
における加圧ローラの定着可能な好適温度、T2は第１の
設定温度状態における加熱ローラ11の表面温度で、T3は
前記高温定着時における加熱ローラ11の定着可能な快適
温度であり、図中横軸は時間の経過を示す。t1はコピー
を行わない待機状態、又は第１の設定温度でのコピー状
態を示す。高温定着の切り替えにより次のt2には加熱ロ
ーラ11が加熱手段15の作用による昇温と加圧ローラ12の
加熱ローラ11に圧接しての従動回転が行われる。従動回
転時間は一定時間t3で、温度上昇のために必要な平均温
度時間t2よりも小さく設定されている。この昇温と従動
回転のための定められた時間t2の経過の後、加熱ローラ
11は高温定着好適温度T3よりも若干高い温度に達し、同
様に加圧ローラ12も好適温度T1よりも若干高い温度に達
する。この時間t2の途中で前記温度検知器13は加熱ロー
ラ11の表面温度が高温定着好適温度T3に達したことを検
知してその旨表示装置に信号を送りコントロールパネル
（不図示）に表示する。 厚紙や特殊紙等におけるコピーとそれに続く高温定着が
終了し引き続き高温定着の要請が無い場合には前記加熱
手段15の通電を止め前記第１の設定温度へと戻し待機す
る。 本発明による定着装置は高温定着に際し以上の如きサイ
クルの繰り返し行うものである。 第３図は本定着装置の高温定着切り替え時における制御
手段17のフローチャートを示したものである。 高温定着切り替えボタンのON操作を行うと、コントロー
ルパネルのLED等の点灯でON状態を知らしめる。OFFなら
再度高温定着切り替えボタンのON操作を行う。 該切り替えボタンのONにより加熱ローラ11に内設せしめ
られた加熱手段15のヒータは通電され該加熱ローラ11の
表面温度は上昇し、同時に加熱ローラ11の駆動源たるモ
ータ14は回転し該加熱ローラ11に圧接従動せしめられる
加圧ローラ12も回転し昇温せしめられる。 前記加熱ローラ11の表面温度が確実に高温定着に好適な
温度に達する時間t2秒の経過するのを待って、厚紙や特
殊紙等のコピーを開始する。An embodiment of the fixing device according to the present invention will be described below with reference to FIGS.
Although described with reference to the drawings, the embodiment of the present invention is not limited thereto. First, each process up to the fixing device in the copying machine will be briefly described. The image carrier is a drum-shaped photoconductor in which a photoconductive substance is laminated on a conductive metal substrate with a certain thickness, and is rotatably configured to rotate in a certain direction so that its photoconductive surface has a plurality of surfaces. The processing stations (not shown) are sequentially passed. The image carrier is charged by the charger, and the surface of the image carrier uniformly holds the electric charge. The image carrier whose photoconductive surface is uniformly charged rotates to enter the exposure section. In the exposure section, the reflected light from the original document is applied to the photoconductive surface of the image carrier through an optical system such as a mirror and a lens to discharge the electric charge in the exposed portion and form an electrostatic latent image of the original document in the exposed portion. The image carrier on which the electrostatic latent image is formed rotates and enters the developing unit. In the developing section, the electrostatic latent image is developed by a developing device, and a developing material containing charged toner particles is attached to the latent image to visualize the original image of the original. The image carrier carrying the toner image visualized by the toner rotates and enters the transfer section. At the transfer portion, the recording paper is conveyed in synchronization with the toner image, and the toner image is transferred onto the recording paper. The recording paper on which the toner image has been transferred is separated from the image carrier by a separator as a transfer paper, further fixed by the fixing device according to the present invention, and ejected outside the machine. On the other hand, the image carrier separated from the recording paper by the separator enters the cleaning device while carrying the untransferred residual toner, where the residual toner on the external image carrier is removed and preparations are made for a new copy cycle. To be done. FIG. 1 is a sectional view of a fixing device according to the present invention. The fixing device 10 includes a heating roller 11 having a heating means 15 therein and a pressure roller not having the heating means 15 in contact with the heating roller 11.
12 and a temperature detector 13 for detecting the surface temperature of the heating roller 11.
A motor 16 for rotating the heating roller 11; and a controller 16 including a temperature control circuit for keeping the surface temperature of the heating roller 11 constant based on a signal detected by the temperature detector 13. Has been. Regarding the transfer material conveyance, unfixed paper etc. can be fixed
After being guided and fixed by the inlet guide upper guide 3 and the inlet guide lower guide 4 which are regulating plates for guiding to the nip position between the heating roller 11 and the pressure roller 12 of 10, the separation claws 5, 6 are fixed.
Separated by. Then, the paper is guided to the paper discharge roller unit 9 by the paper discharge upper guide 7 and the paper discharge lower guide 8. The heating roller 11 has an outer diameter of 30 mm, a wall thickness of 2 mm, and a length of 27.
It has a structure in which a 900 watt heater as a heating means 15 is internally provided in a 0 mm metal cylinder, and the surface thereof is coated with hard Teflon. The pressure roller 12 has an outer shape of 30 mm and a length of 270 including a thickness of 5 mm of a coating material having releasability such as silicon rubber.
A millimeter cylindrical body is formed so as to be pressed against the heating roller 11 to rotate in a slave manner. The mechanism that presses the pressure roller 12 against the heating roller 11 to rotate the pressure roller 12 is a controller that includes a controller including a timer circuit 16 and a motor 14 that drives the heating roller 11 to rotate.
And a control means 17 such as U. In this mechanism, when there is an instruction to change the material of the recording paper from the control means 17, when the surface temperature of the heating roller 11 is switched to the second set temperature, the control means 17 drives the motor 14 for a certain period of time after the switching. The pressure roller 12 is driven to rotate by the heating roller 11. The linear velocity at the pressure contact portion between the pressure roller 12 and the heating roller 11 in this embodiment is 70 mm / sec. The fixing device according to the present invention is configured as described above, and its operation will be described below. In the fixing device according to the present exemplary embodiment, when the heating rate of the heating roller 11 is 4 ° C./sec on average, in the normal state, the copying operation is started by turning on the copy button, and at the same time, the pressure roller 12 is rotated by the heating roller 11. The driven roller starts to rotate and the heat is removed from the heating roller 11, but after 2 seconds, the temperature detector 13 detects it, and the heating means 15 is energized. The temperature drop at the pressure contact portion at the time of passing through the pressure contact portion is at most 20 ° C., and no defective fixing occurs. In the case of thick paper such as postcards and special paper such as OHP sheets, the temperature is switched to the second set temperature which is set higher than the first set temperature used for normal fixing. After switching, while heating the heating roller 11 by the heating means 15 for a predetermined time, the pressure roller 12 is heated by the heating roller 11.
It is controlled so as to be pressed against and to be driven to rotate. When the heating roller 11 reaches the second set temperature, the temperature detector 13
Is detected and a message indicating that high temperature fixing is possible is displayed on a control panel (not shown). After the completion of the high-temperature fixing, when the copying requiring the high-temperature fixing is not performed within a certain period of time and the time elapses or when the copying requiring the normal fixing is performed, the temperature is returned to the first set temperature. To That is, in the fixing device according to the present invention, the so-called normal state or standby state is the first set temperature and state,
It is necessary to switch to the second set temperature when fixing thick paper or special paper, and if the switch button is clicked, the pressure roller 12 will be driven to rotate with the heating roller 11 without fail. It is controlled so that the temperature can be raised to a preferable fixing temperature. FIG. 2 shows the relationship between the surface temperature of the heating roller 11 and the pressure roller 12 and the time during high temperature fixing in the fixing device of the present invention. In the figure, symbol A is the surface temperature of the heating roller, B is the surface temperature of the pressure roller, T 0 is the room temperature or the surface temperature of the pressure roller 12 in the first set temperature state, and T 1 is the high temperature fixing time. A suitable temperature at which the pressure roller can be fixed, T 2 is a surface temperature of the heating roller 11 in the first set temperature state, and T 3 is a comfortable temperature at which the heating roller 11 can be fixed at the time of the high temperature fixing. The horizontal axis indicates the passage of time. t 1 indicates a standby state in which copying is not performed or a copying state at the first set temperature. By switching the high-temperature fixing, the temperature of the heating roller 11 is raised by the action of the heating means 15 at the next time t 2 , and the driven roller of the pressing roller 12 is brought into pressure contact with the heating roller 11. In the driven rotation time is a predetermined time t 3, is set to be smaller than the average temperature the time required for temperature rise t 2. After the elapse of a predetermined time t 2 for this temperature rise and driven rotation, the heating roller
11 reaches a temperature slightly higher than the high temperature fixing preferable temperature T 3 , and similarly, the pressure roller 12 also reaches a temperature slightly higher than the preferable temperature T 1 . In the middle of this time t 2, the temperature detector 13 detects that the surface temperature of the heating roller 11 has reached the high temperature fixing preferable temperature T 3 , and sends a signal to that effect to a display device to display it on a control panel (not shown). To do. When copying on thick paper or special paper and the subsequent high-temperature fixing are completed and there is no further request for high-temperature fixing, the heating means 15 is de-energized and returned to the first set temperature and waits. The fixing device according to the present invention repeats the above-described cycle in high temperature fixing. FIG. 3 shows a flow chart of the control means 17 when switching the high temperature fixing of the present fixing device. When the high temperature fixing switch button is turned on, the LED on the control panel lights up to indicate the ON state. If it is OFF, turn ON the high temperature fixing switch button again. When the switching button is turned on, the heater of the heating means 15 provided inside the heating roller 11 is energized and the surface temperature of the heating roller 11 rises, and at the same time, the motor 14 which is the drive source of the heating roller 11 rotates and the heating roller 11 rotates. The pressure roller 12, which is pressed and driven by the pressure roller 11, also rotates to raise the temperature. After the time t 2 seconds that the surface temperature of the heating roller 11 surely reaches the temperature suitable for high temperature fixing, the copying of thick paper or special paper is started.
以上の説明に明らかな如く本発明の定着装置は、厚紙や
特殊紙等の高温定着に際しその都度、加熱ローラの昇温
と加圧ローラの加熱ローラに対する従動回転を一定時間
同時に行い高温定着の好適温度を実現出来るようにした
ので、その結果定着不良の減少に顕著な効果を有する定
着装置が提供されることとなった。As is clear from the above description, the fixing device of the present invention is suitable for high-temperature fixing by performing temperature increase of the heating roller and driven rotation of the pressure roller with respect to the heating roller at the same time for each high-temperature fixing of thick paper or special paper. Since the temperature can be realized, as a result, a fixing device having a remarkable effect in reducing fixing defects is provided.
第１図は本発明の一実施例の概要図、第２図は高温定着
切り替え時のタイムチャート、第３図は高温定着切り替
え時のフローチャートである。 ２……クリーニングローラ ３……入口案内上ガイド、４……入口案内下ガイド ５……分離爪（上）、６……分離爪（下） ７……排紙上ガイド、８……排紙下ガイド ９……排紙ローラユニット 10……定着装置、11……加熱ローラ 12……加圧ローラ、13……温度検知器 14……モータ、15……加熱手段 16……タイマー回路を含むコントローラー 17……CPU等の制御手段 T2……第１の設定温度、T3……第２の設定温度 t2……第２の設定温度への到達時間FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is a time chart when switching high temperature fixing, and FIG. 3 is a flowchart when switching high temperature fixing. 2 ... Cleaning roller 3 ... Entrance guide upper guide 4 ... Entrance guide lower guide 5 ... Separation claw (upper), 6 ... Separation claw (lower) 7 ... Paper ejection upper guide, 8 ... Paper ejection lower Guide 9 ...... Paper ejection roller unit 10 ...... Fixing device, 11 ...... Heating roller 12 ...... Pressure roller, 13 ...... Temperature detector 14 ...... Motor, 15 ...... Heating means 16 ...... Controller including timer circuit 17 …… Control means such as CPU T 2 …… First set temperature, T 3 …… Second set temperature t 2 …… Time to reach second set temperature
Claims (1)
ローラに接触して回転し、内部に加熱手段を有しない加
圧ローラとを配置し、この加熱ローラと加圧ローラとの
間に搬送される記録紙の材質によって加熱温度を制御す
るようにした定着装置において、 加熱ローラの表面温度を第１の設定温度と第２の設定温
度の二段階に設定制御する制御回路を設け、通常は第１
の設定温度に維持され、前記加熱ローラと加圧ローラと
の間に挿入される記録紙の材質の変更指示があったと
き、前記加熱ローラに加圧ローラを接触させ、加圧ロー
ラを従動回転させて加熱し、一定時間経過後、加熱ロー
ラの表面温度を高めの第２の設定温度にして前記記録紙
を定着することを特徴とする定着装置。1. A heating roller having a heating means therein, and a pressure roller which comes into contact with the heating roller and rotates and which does not have the heating means therein are arranged, and between the heating roller and the pressure roller. In the fixing device in which the heating temperature is controlled according to the material of the recording paper conveyed to, the control circuit for setting and controlling the surface temperature of the heating roller in two stages of the first set temperature and the second set temperature is provided. Usually first
When the instruction to change the material of the recording paper inserted between the heating roller and the pressure roller is maintained at the set temperature, the pressure roller is brought into contact with the heating roller and the pressure roller is driven to rotate. A fixing device, characterized in that the recording paper is heated and heated, and after a certain period of time, the surface temperature of the heating roller is raised to a second preset temperature to fix the recording paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61291182A JPH0758414B2 (en) | 1986-12-05 | 1986-12-05 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61291182A JPH0758414B2 (en) | 1986-12-05 | 1986-12-05 | Fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63143574A JPS63143574A (en) | 1988-06-15 |
| JPH0758414B2 true JPH0758414B2 (en) | 1995-06-21 |
Family
ID=17765522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61291182A Expired - Lifetime JPH0758414B2 (en) | 1986-12-05 | 1986-12-05 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0758414B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01221779A (en) * | 1988-02-29 | 1989-09-05 | Canon Inc | Fixing device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0656536B2 (en) * | 1983-10-18 | 1994-07-27 | キヤノン株式会社 | Heat fixing device |
| JPS5972464A (en) * | 1983-07-27 | 1984-04-24 | Canon Inc | Fixing device |
| JPS60252380A (en) * | 1984-05-29 | 1985-12-13 | Canon Inc | Image recording device |
| JPH079554B2 (en) * | 1985-01-31 | 1995-02-01 | 三田工業株式会社 | Toner image fixing device |
-
1986
- 1986-12-05 JP JP61291182A patent/JPH0758414B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63143574A (en) | 1988-06-15 |
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