JP2002174985A - Fixing device and fixing method - Google Patents
Fixing device and fixing methodInfo
- Publication number
- JP2002174985A JP2002174985A JP2000373449A JP2000373449A JP2002174985A JP 2002174985 A JP2002174985 A JP 2002174985A JP 2000373449 A JP2000373449 A JP 2000373449A JP 2000373449 A JP2000373449 A JP 2000373449A JP 2002174985 A JP2002174985 A JP 2002174985A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fixing
- temperature control
- fixing device
- heating
- 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
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子写真方式の複
写機、レーザービームプリンタ等の画像形成装置に使用
される定着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device used in an image forming apparatus such as an electrophotographic copying machine and a laser beam printer.
【０００２】[0002]
【従来の技術】従来から、電子写真方式の複写機やプリ
ンタ等の画像形成装置における定着装置として、熱ロー
ラ方式やオンデマンド方式のものが知られている。2. Description of the Related Art Conventionally, as a fixing device in an image forming apparatus such as an electrophotographic copying machine or a printer, a heat roller type or an on-demand type is known.
【０００３】熱ローラ方式では、ハロゲンヒータ等の内
蔵熱源により予め定められた加熱温度に維持させた加熱
ローラである定着ローラと、これに圧接させた弾性加圧
ローラとによって形成される圧接ニップ部（定着ニップ
部）に記録紙を導入して挾持搬送させることにより、加
熱ローラの熱で記録紙面の未定着画像を加熱定着させ
る。In the heat roller system, a pressure nip portion formed by a fixing roller, which is a heating roller maintained at a predetermined heating temperature by a built-in heat source such as a halogen heater, and an elastic pressure roller pressed against the fixing roller. An unfixed image on the recording paper surface is heated and fixed by the heat of the heating roller by introducing the recording paper into the (fixing nip portion) and nipping and conveying the recording paper.
【０００４】上述の定着ローラは記録紙表面に接触する
円筒状のローラであり、表面は離型性のよい材料で構成
され、その内側に配置されたハロゲンヒータによってト
ナーを加熱する。また、記録紙裏面に接触する加圧ロー
ラは、芯金上に弾性層を設けて構成され、トナー層に適
度な加圧を行なう。The above-mentioned fixing roller is a cylindrical roller that comes into contact with the surface of the recording paper. The surface is made of a material having good releasability, and the toner is heated by a halogen heater arranged inside the fixing roller. Further, the pressure roller that comes into contact with the back surface of the recording paper is formed by providing an elastic layer on a cored bar, and applies an appropriate pressure to the toner layer.
【０００５】一方、オンデマンド方式の定着装置は、熱
ローラ方式のエネルギーロスの多い欠点を解消して、ク
イックスタート、省電力を可能にする。この方式は、熱
ローラ方式におけるハロゲンヒータ及び定着ローラの代
替としてセラミック等のヒータとポリイミド等の薄いフ
ィルムを用いて定着装置の熱容量を小さくすることによ
り、熱ローラ方式の定着装置における熱ロスの問題点を
解決している。On the other hand, the fixing device of the on-demand system eliminates the disadvantage of the heat roller system having large energy loss, and enables quick start and power saving. This method uses a heater such as ceramic and a thin film such as polyimide as a substitute for the halogen heater and the fixing roller in the heat roller method to reduce the heat capacity of the fixing device, thereby causing a problem of heat loss in the heat roller type fixing device. Have solved the point.
【０００６】オンデマンド方式の定着装置では、熱容量
が小さくかつ温度応答性が高いため、定着装置を予熱す
る必要がない。また、きめ細かな温度制御が可能であ
り、通紙時以外は定着装置への通電をオフすることがで
きる。In the on-demand type fixing device, since the heat capacity is small and the temperature response is high, it is not necessary to preheat the fixing device. In addition, fine temperature control is possible, and the power supply to the fixing device can be turned off except when the paper is passed.
【０００７】これらの定着装置を有する画像形成装置に
おいては、定着装置内に設けられた加熱体に複数の温度
検知素子、すなわちサーミスタを配設し、それらを利用
して加熱体の温調（電力）制御を行なうものが知られて
いる。In an image forming apparatus having such a fixing device, a plurality of temperature detecting elements, that is, thermistors are disposed on a heating element provided in the fixing apparatus, and the temperature of the heating element is controlled by using these elements. ) Control is known.
【０００８】この種の画像形成装置では、記録紙中央部
が通過する位置である加熱体の中央部に第２のサーミス
タ（メインサーミスタ）が設けられており、加熱体の端
部に第１のサーミスタ（サブサーミスタ）が設けられて
いる。そして、メインサーミスタで検出した温度によ
り、加熱体を目標温度に保つ電力制御を行い、メインサ
ーミスタあるいはサブサーミスタが加熱体温度の異常高
温状態を示す上限温度を検出した場合には、画像形成装
置本体の主電源を遮断して加熱体への電力供給を停止す
るためのリセット制御を行う。In this type of image forming apparatus, a second thermistor (main thermistor) is provided at a central portion of the heating member where the central portion of the recording paper passes, and a first thermistor is provided at an end of the heating member. A thermistor (sub thermistor) is provided. Based on the temperature detected by the main thermistor, power control is performed to maintain the heating element at the target temperature. When the main thermistor or sub thermistor detects an upper limit temperature indicating an abnormally high temperature of the heating element, the image forming apparatus main body Reset control for shutting off the main power supply to stop the power supply to the heating element.
【０００９】また、封筒等のように、定着装置の長手加
熱域に対し比較的幅の狭い記録紙（以下、小サイズ紙と
呼ぶ）を連続通紙する場合には、非通紙部昇温による端
部のサブサーミスタの検出温度状況によってメインサー
ミスタの温調、もしくはスループットの変更といった制
御が可能である。Further, when a relatively narrow recording paper (hereinafter referred to as a small size paper) such as an envelope is continuously passed through a longitudinal heating area of the fixing device, the temperature of the non-paper passing portion is increased. It is possible to control the temperature of the main thermistor or change the throughput depending on the detected temperature of the sub thermistor at the end.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、上述し
た従来の定着装置における通常定着制御は、基本的にメ
インサーミスタの検出温度のみで行なわれている。した
がって、定格電源電圧の異なる地域に同一の画像形成装
置を提供した場合においても同一の制御テーブルに従っ
た定着電力制御しか行なえないために、地域によって印
刷画像品質にばらつきが生じてしまう場合があった。However, the normal fixing control in the above-mentioned conventional fixing device is basically performed only at the temperature detected by the main thermistor. Therefore, even when the same image forming apparatus is provided in regions with different rated power supply voltages, only fixing power control in accordance with the same control table can be performed, so that print image quality may vary depending on the region. Was.
【００１１】すなわち、世界各国では、国ごとに定格電
源電圧が定められており、大きくは１００Ｖ圏と２００
Ｖ圏に区分されるが、同じ１００Ｖ圏の中には１００Ｖ
（日本）、１２０Ｖ（ＵＳＡ）、１２７Ｖ（メキシコ）
等が存在し、一国の中でも地域によって多少の変動があ
る。したがって、１００Ｖ圏の最大供給電力と最小供給
電力とは２倍以上の格差がある。That is, in each country in the world, the rated power supply voltage is determined for each country.
It is divided into V zone, but 100V is in the same 100V zone.
(Japan), 120V (USA), 127V (Mexico)
Etc., and there is some variation depending on the region within a country. Therefore, there is a difference of more than twice between the maximum supply power and the minimum supply power in the 100V zone.
【００１２】本来ならば、任意の地域において、画像形
成装置中の定着装置に対して一定の電力供給、電力制御
を行い安定した画像品質を供給すべきである。そのため
には、専用のユニバーサル電源を追加する必要があり、
昨今のプリンタなどの小型化、低価格化の流れにそぐわ
ない。このため、１００Ｖ圏（あるいは２００Ｖ圏）に
提供する画像形成装置中の定着装置の加熱時には、それ
ぞれの地域の電源電圧を直接投入している場合が多い。Originally, in an arbitrary area, it is necessary to supply constant power and control power to a fixing device in an image forming apparatus to supply stable image quality. For that, you need to add a dedicated universal power supply,
It is incompatible with the recent trend of downsizing and price reduction of printers and the like. For this reason, when heating the fixing device in the image forming apparatus for providing the 100V area (or the 200V area), the power supply voltage of each area is often directly applied.
【００１３】しかしながら、加熱体に供給される入力電
力が大きいとき、通紙時温調制御初期に目標温度に対し
て高温気味になり（オーバーシュートし）、定着過多に
よる記録紙先端のテカリが生じてしまうという問題があ
った。However, when the input power supplied to the heating element is large, the temperature becomes slightly higher than the target temperature (overshoot) at the initial stage of the temperature control at the time of paper passing, and the leading edge of the recording paper is shined due to excessive fixing. There was a problem that would.
【００１４】また、入力電力が大きい場合、通紙中の電
力量をより適正に制御しなければ、目標温度に対する温
度の波打ち（温度リップル）が激しくなり、画像上で定
着不良とテカリが交互に現れる定着リップル（光沢ム
ラ）現象が生じてしまうという問題があった。In addition, when the input power is large, if the power amount during paper passing is not controlled more appropriately, the temperature undulation (temperature ripple) with respect to the target temperature becomes severe, and the fixing failure and the shininess alternate on the image. There is a problem that a fixing ripple (gloss unevenness) phenomenon appears.
【００１５】さらに、記録紙（特に小サイズ紙）の連続
通紙中に重送が起こった場合、入力電力（定格電源電
圧）が大きい場合、非通紙部の異常昇温によって加熱体
や加圧ローラがダメージを受けやすくなるという問題が
あった。Further, when a double feed occurs during continuous feeding of recording paper (especially small size paper), when input power (rated power supply voltage) is large, or when a non-sheet-passing portion is abnormally heated, the heating element or heating element is heated. There is a problem that the pressure roller is easily damaged.
【００１６】これらの問題は、熱容量の少ないオンデマ
ンド方式の定着装置の場合には、少々の熱負荷の変動に
よって温度が大きく変動するために特に悪化する。These problems are particularly exacerbated in the case of an on-demand type fixing device having a small heat capacity, because the temperature fluctuates greatly due to a slight fluctuation in heat load.
【００１７】本発明は、このような問題を解決するため
になされたものであり、その目的とするところは、加熱
体に供給される定格電源電力をより精密に見積もること
によって、欧米やアジア等、定格電源電圧が異なる地域
においても、安定した画像品質を保つことが可能な定着
装置を提供することにある。The present invention has been made to solve such a problem, and an object of the present invention is to estimate the rated power supply to be supplied to a heating element more precisely, thereby making it possible to use the power supply in Europe, the United States, Asia, and the like. Another object of the present invention is to provide a fixing device capable of maintaining stable image quality even in regions having different rated power supply voltages.
【００１８】[0018]
【課題を解決するための手段】このような目的を達成す
るために、請求項１に記載の発明は、加熱体と、一対の
定着回転体とを有し、該一対の定着回転体を加圧接触さ
せて形成される圧接部を通過する記録紙上のトナー画像
を前記加熱体からの熱によって加熱定着する定着装置で
あって、前記加熱体の温度を検知する複数の温度検知素
子と、非通紙時に前記複数の温度検知素子のうちの第１
の温度検知素子の出力に基づいて一定温度制御を実行
し、通紙時に前記複数の温度検知素子のうちの第２の温
度検知素子の出力に基づいて定着温度制御を実行する温
度制御手段とを具えたことを特徴とする。Means for Solving the Problems To achieve such an object, the invention according to claim 1 has a heating element and a pair of fixing rotators, and the pair of fixing rotators are added. A fixing device that heats and fixes a toner image on a recording sheet passing through a pressure contact portion formed by pressure contact by heat from the heating element, the fixing apparatus including a plurality of temperature detection elements for detecting a temperature of the heating element, The first of the plurality of temperature sensing elements during paper passing
Temperature control means for performing constant temperature control based on the output of the temperature detecting element of the above, and performing fixing temperature control based on the output of the second temperature detecting element of the plurality of temperature detecting elements during paper passing. It is characterized by having.
【００１９】また、請求項２に記載の発明は、請求項１
に記載の定着装置において、前記第１の温度検知素子は
前記加熱体の加熱領域の端部に取付けられ、前記第２の
温度検知素子は前記加熱体の加熱領域の中央部に取付け
られたことを特徴とする。The invention described in claim 2 is the first invention.
The fixing device according to claim 1, wherein the first temperature detecting element is attached to an end of a heating area of the heating element, and the second temperature detecting element is attached to a central part of the heating area of the heating element. It is characterized by.
【００２０】また、請求項３に記載の発明は、請求項１
または２に記載の定着装置において、前記加熱体の温度
に対する前記第２の温度検知素子の温度応答速度は、前
記第１の温度検知素子の温度応答速度よりも高いことを
特徴とする。Further, the invention according to claim 3 provides the invention according to claim 1.
Or the temperature response speed of the second temperature detection element with respect to the temperature of the heating element is higher than the temperature response speed of the first temperature detection element.
【００２１】また、請求項４に記載の発明は、請求項１
ないし３のいずれか１項に記載の定着装置において、前
記温度制御手段は、非通紙時における一定温度制御中
に、前記第２の温度検知素子が検出する温度振幅に応じ
て通紙時の温度制御条件を決定することを特徴とする。The invention described in claim 4 is the first invention.
The fixing device according to any one of claims 1 to 3, wherein the temperature control unit performs the constant temperature control during the non-sheet-passing state, and performs the temperature control according to the temperature amplitude detected by the second temperature detecting element during the sheet-passing state. The temperature control condition is determined.
【００２２】また、請求項５に記載の発明は、請求項４
に記載の定着装置において、前記温度制御手段は、前記
第２の温度検知素子が検出する温度に基づいて前記加熱
体に入力される電源電圧を見積もり、前記見積もり後の
電源電圧に応じて通紙時の温度制御条件を決定すること
を特徴とする。The invention described in claim 5 is the same as the invention in claim 4.
Wherein the temperature control unit estimates a power supply voltage input to the heating element based on a temperature detected by the second temperature detection element, and feeds the paper in accordance with the estimated power supply voltage. The temperature control condition at the time is determined.
【００２３】また、請求項６に記載の発明は、請求項１
ないし５のいずれか１項に記載の定着装置において、前
記温度制御手段は、前記第２の温度検知素子が温度制御
を開始する温度、前記第２の温度検知素子による温度制
御中に前記加熱体へ入力する前記第２の温度検知素子の
検知出力に応じた供給電力、および記録紙の重送時にお
ける温度制御条件のいずれかを決定することを特徴とす
る。[0023] The invention described in claim 6 is the first invention.
6. The fixing device according to claim 5, wherein the temperature control unit is configured to control a temperature at which the second temperature detection element starts temperature control, and the heating element during temperature control by the second temperature detection element. In this case, any one of a supply power according to a detection output of the second temperature detection element to be input to the recording paper and a temperature control condition at the time of double feeding of recording paper is determined.
【００２４】また、請求項７に記載の発明は、薄膜フィ
ルムを介して記録紙を加熱する加熱体と、該加熱体との
間に形成される圧接部に導入された該記録紙を、前記薄
膜フィルムを介して前記加熱体に加圧することにより、
通紙時に前記記録紙上のトナー画像を加熱定着する加圧
ローラとを有する定着装置であって、前記加熱体の温度
を検知する複数の温度検知素子と、非通紙時に前記複数
の温度検知素子のうちの第１の温度検知素子の出力によ
り一定温度制御を実行し、通紙時に前記複数の温度検知
素子のうちの第２の温度検知素子の出力により定着温度
制御を実行する温度制御手段とを具えたことを特徴とす
る。Further, according to the present invention, a heating element for heating a recording sheet via a thin film, and the recording sheet introduced into a press-contact portion formed between the heating element and the heating element are connected to the heating element. By pressurizing the heating body through a thin film,
A fixing device having a pressure roller for heating and fixing a toner image on the recording paper during paper passing, wherein the plurality of temperature detecting elements detect a temperature of the heating element, and the plurality of temperature detecting elements during non-paper passing. Temperature control means for performing constant temperature control by the output of the first temperature detection element among the plurality of temperature detection elements, and performing fixing temperature control by the output of the second temperature detection element among the plurality of temperature detection elements during paper passing; It is characterized by having.
【００２５】また、請求項８に記載の発明は、請求項７
に記載の定着装置において、前記第１の温度検知素子は
前記加熱体の加熱領域の端部に取付けられ、前記第２の
温度検知素子は前記加熱体の加熱領域の中央部に取付け
られることを特徴とする。The invention described in claim 8 is the same as the invention described in claim 7.
The fixing device according to claim 1, wherein the first temperature sensing element is attached to an end of a heating area of the heating element, and the second temperature sensing element is attached to a central part of the heating area of the heating element. Features.
【００２６】また、請求項９に記載の発明は、請求項８
に記載の定着装置において、前記加熱体の温度に対する
前記第２の温度検知素子の温度応答速度は、前記第１の
温度検知素子の温度応答速度よりも高いことを特徴とす
る。The invention according to claim 9 is the same as the invention according to claim 8.
Wherein the temperature response speed of the second temperature detection element with respect to the temperature of the heating element is higher than the temperature response speed of the first temperature detection element.
【００２７】また、請求項１０に記載の発明は、請求項
９に記載の定着装置において、前記第１の温度検知素子
による非通紙時の一定温度制御は一段階の加熱体への通
電のオン／オフ制御であり、前記第２の温度検知素子に
よる通紙時の定着温度制御は多段階電力制御であること
を特徴とする。According to a tenth aspect of the present invention, in the fixing device according to the ninth aspect, the constant temperature control at the time of non-sheet passing by the first temperature detecting element is a step of energizing the heating element. It is an on / off control, and the fixing temperature control at the time of sheet passing by the second temperature detecting element is a multi-step power control.
【００２８】また、請求項１１に記載の発明は、請求項
８ないし１０のいずれか１項に記載の定着装置におい
て、前記温度制御手段は、非通紙時における一定温度制
御中に、前記第２の温度検知素子が検出する温度振幅に
応じて通紙時の温度制御条件を決定することを特徴とす
る。[0028] Further, according to an eleventh aspect of the present invention, in the fixing device according to any one of the eighth to tenth aspects, the temperature control means performs the first temperature control during the constant temperature control when paper is not passed. The temperature control condition during paper passing is determined according to the temperature amplitude detected by the second temperature detecting element.
【００２９】また、請求項１２に記載の発明は、請求項
１１に記載の定着装置において、前記温度制御手段は、
前記第２の温度検知素子が検出する温度に基づいて前記
加熱体に入力される電源電圧を見積もり、前記見積もり
後の電源電圧に応じて通紙時の温度制御条件を決定する
ことを特徴とする。According to a twelfth aspect of the present invention, in the fixing device according to the eleventh aspect, the temperature control means includes:
A power supply voltage input to the heating element is estimated based on a temperature detected by the second temperature detection element, and a temperature control condition at the time of sheet passing is determined according to the estimated power supply voltage. .
【００３０】また、請求項１３に記載の発明は、請求項
８ないし１２のいずれか１項に記載の定着装置におい
て、前記温度制御手段は、前記第１の温度検知素子の出
力による一定温度制御中に、前記第２の温度検知素子の
振幅周期の時間間隔の大小に応じて通紙時の温度制御条
件を決定することを特徴とする。According to a thirteenth aspect of the present invention, in the fixing device according to any one of the eighth to twelfth aspects, the temperature control means controls the constant temperature by an output of the first temperature detecting element. In the method, the temperature control condition at the time of sheet passing is determined according to the magnitude of the time interval of the amplitude cycle of the second temperature detecting element.
【００３１】また、請求項１４に記載の発明は、請求項
８ないし１３のいずれか１項に記載の定着装置におい
て、前記温度制御手段は、前記第２の温度検知素子が温
度制御を開始する温度、前記第２の温度検知素子による
一定温度制御中に前記加熱体へ入力する電力の比率、ま
たは記録紙の重送時における温度制御条件のいずれかを
決定することを特徴とする。According to a fourteenth aspect of the present invention, in the fixing device according to any one of the eighth to thirteenth aspects, the temperature control means starts the temperature control by the second temperature detecting element. A temperature, a ratio of electric power input to the heating element during the constant temperature control by the second temperature detecting element, or a temperature control condition at the time of multi-feeding of the recording paper is determined.
【００３２】また、請求項１５に記載の発明は、定着方
法であって、加熱体と、一対の定着回転体とを有し、該
一対の定着回転体を加圧接触させて形成される圧接部を
通過する記録紙上のトナー画像を前記加熱体からの熱に
よって加熱定着する定着装置を使用し、非通紙時に前記
加熱体の温度を検知する第１の温度検知素子の出力に基
づいて一定温度制御を実行し、通紙時に前記加熱体の温
度を検知する第２の温度検知素子の出力に基づいて定着
温度制御を実行することを特徴とする。The invention according to claim 15 is a fixing method, comprising a heating member and a pair of fixing rotators, and a pressure contact formed by bringing the pair of fixing rotators into pressure contact. A fixing device that heats and fixes the toner image on the recording paper passing through the unit by the heat from the heating member is used. The fixing device is configured to detect the temperature of the heating member when the sheet is not passed, based on an output of a first temperature detection element. The temperature control is executed, and the fixing temperature control is executed based on the output of the second temperature detecting element for detecting the temperature of the heating element when the sheet is passed.
【００３３】また、請求項１６に記載の発明は、請求項
１５に記載の定着方法において、前記第１の温度検知素
子は前記加熱体の加熱領域の端部に取付けられ、前記第
２の温度検知素子は前記加熱体の加熱領域の中央部に取
付けられたことを特徴とする。According to a sixteenth aspect of the present invention, in the fixing method according to the fifteenth aspect, the first temperature detecting element is attached to an end of a heating area of the heating element, and The sensing element is attached to a central part of a heating area of the heating element.
【００３４】また、請求項１７に記載の発明は、請求項
１５または１６に記載の定着方法において、前記加熱体
の温度に対する前記第２の温度検知素子の温度応答速度
は、前記第１の温度検知素子の温度応答速度よりも高い
ことを特徴とする。According to a seventeenth aspect of the present invention, in the fixing method according to the fifteenth or sixteenth aspect, the temperature response speed of the second temperature detecting element with respect to the temperature of the heating element is equal to the first temperature. It is characterized by being higher than the temperature response speed of the sensing element.
【００３５】また、請求項１８に記載の発明は、請求項
１５ないし１７のいずれか１項に記載の定着方法におい
て、非通紙時における一定温度制御中に、前記第２の温
度検知素子が検出する温度振幅に応じて通紙時の温度制
御条件を決定することを特徴とする。The invention according to claim 18 is a fixing method according to any one of claims 15 to 17, wherein the second temperature detecting element is controlled during constant temperature control during non-sheet passing. It is characterized in that the temperature control condition at the time of paper passing is determined according to the detected temperature amplitude.
【００３６】また、請求項１９に記載の発明は、請求項
１８に記載の定着方法において、前記通紙時の温度制御
条件の決定は、前記第２の温度検知素子が検出する温度
に基づいて前記加熱体に入力される電源電圧を見積も
り、前記見積もり後の電源電圧に応じて通紙時の温度制
御条件を決定することを含むことを特徴とする。According to a nineteenth aspect of the present invention, in the fixing method according to the eighteenth aspect, the determination of the temperature control condition during the sheet passing is performed based on the temperature detected by the second temperature detecting element. The method further includes estimating a power supply voltage input to the heating element, and determining a temperature control condition at the time of paper passing according to the estimated power supply voltage.
【００３７】また、請求項２０に記載の発明は、請求項
１５ないし１９のいずれか１項に記載の定着方法におい
て、前記第１の温度検知素子の出力による一定温度制御
中に、前記第２の温度検知素子が温度制御を開始する温
度、前記第２の温度検知素子による温度制御中に前記加
熱体へ入力する前記第２の温度検知素子の検知出力に応
じた供給電力、および記録紙の重送時における温度制御
条件のいずれかを決定することを特徴とする。According to a twentieth aspect of the present invention, in the fixing method according to any one of the fifteenth to nineteenth aspects, the second temperature is controlled during the constant temperature control by the output of the first temperature detecting element. A temperature at which the temperature detection element starts temperature control, a supply power according to a detection output of the second temperature detection element input to the heating element during the temperature control by the second temperature detection element, and It is characterized in that one of the temperature control conditions at the time of double feeding is determined.
【００３８】また、請求項２１に記載の発明は、薄膜フ
ィルムを介して記録紙を加熱する加熱体と、該加熱体と
の間に形成される圧接部に導入された該記録紙を、前記
薄膜フィルムを介して前記加熱体に加圧することによ
り、前記記録紙上のトナー画像を加熱定着する加圧ロー
ラとを有する定着装置を使用し、非通紙時に前記加熱体
の温度を検知する第１の温度検知素子の出力により一定
温度制御を実行し、通紙時に前記加熱体の温度を検知す
る第２の温度検知素子の出力により定着温度制御を実行
することを特徴とする。Further, according to a twenty-first aspect of the present invention, a heating element for heating a recording sheet via a thin film, and the recording sheet introduced into a pressure contact portion formed between the heating element and the heating element are connected to the heating element. A fixing device having a pressure roller for heating and fixing the toner image on the recording paper by applying pressure to the heating element through a thin film, and detecting a temperature of the heating element when paper is not passed is used. The constant temperature control is executed by the output of the temperature detecting element, and the fixing temperature control is executed by the output of the second temperature detecting element for detecting the temperature of the heating element at the time of paper passing.
【００３９】また、請求項２２に記載の発明は、請求項
２１に記載の定着方法において、前記第１の温度検知素
子は前記加熱体の加熱領域の端部に取付けられ、前記第
２の温度検知素子は前記加熱体の加熱領域の中央部に取
付けられたことを特徴とする。According to a twenty-second aspect of the present invention, in the fixing method according to the twenty-first aspect, the first temperature detecting element is attached to an end of a heating area of the heating element, and The sensing element is attached to the center of the heating area of the heating element.
【００４０】また、請求項２３に記載の発明は、請求項
２２に記載の定着方法において、前記加熱体の温度に対
する前記第２の温度検知素子の温度応答速度は、前記第
１の温度検知素子の温度応答速度よりも高いことを特徴
とする。According to a twenty-third aspect of the present invention, in the fixing method according to the twenty-second aspect, the temperature response speed of the second temperature detecting element with respect to the temperature of the heating element is equal to the first temperature detecting element. Is higher than the temperature response speed.
【００４１】また、請求項２４に記載の発明は、請求項
２３に記載の定着方法において、前記第１の温度検知素
子による非通紙時の一定温度制御は一段階の加熱体への
通電のオン／オフ制御であり、前記第２の温度検知素子
による通紙時の定着温度制御は多段階電力制御であるこ
とを特徴とする。According to a twenty-fourth aspect of the present invention, in the fixing method according to the twenty-third aspect, the constant temperature control at the time of non-sheet passing by the first temperature detecting element is a step of energizing the heating element. It is an on / off control, and the fixing temperature control at the time of sheet passing by the second temperature detecting element is a multi-step power control.
【００４２】また、請求項２５に記載の発明は、請求項
２２ないし２４のいずれか１項に記載の定着方法におい
て、非通紙時における一定温度制御中に、前記第２の温
度検知素子が検出する温度振幅に応じて通紙時の温度制
御条件を決定することを特徴とする。According to a twenty-fifth aspect of the present invention, in the fixing method according to any one of the twenty-second to twenty-fourth aspects, the second temperature detecting element may be connected to the second temperature detecting element during the constant temperature control during non-sheet passing. It is characterized in that the temperature control condition at the time of paper passing is determined according to the detected temperature amplitude.
【００４３】また、請求項２６に記載の発明は、請求項
２５に記載の定着方法において、前記通紙時の温度制御
条件の決定は、前記第２の温度検知素子が検出する温度
に基づいて前記加熱体に入力される電源電圧を見積も
り、前記見積もり後の電源電圧に応じて通紙時の温度制
御条件を決定することを含むことを特徴とする。According to a twenty-sixth aspect of the present invention, in the fixing method according to the twenty-fifth aspect, the determination of the temperature control condition at the time of paper passing is performed based on a temperature detected by the second temperature detecting element. The method further includes estimating a power supply voltage input to the heating element, and determining a temperature control condition at the time of paper passing according to the estimated power supply voltage.
【００４４】また、請求項２７に記載の発明は、請求項
２２ないし２６のいずれか１項に記載の定着方法におい
て、前記第１の温度検知素子の出力による一定温度制御
中に、前記第２の温度検知素子の振幅周期の時間間隔の
大小に応じて通紙時の温度制御条件を決定することを特
徴とする。According to a twenty-seventh aspect of the present invention, in the fixing method according to any one of the twenty-second to twenty-sixth aspects, the second temperature is controlled during the constant temperature control by the output of the first temperature detecting element. The temperature control condition at the time of sheet passing is determined according to the magnitude of the time interval of the amplitude cycle of the temperature detecting element.
【００４５】さらに、請求項２８に記載の発明は、請求
項２２ないし２７のいずれか１項に記載の定着方法にお
いて、前記第１の温度検知素子の出力による一定温度制
御中に、前記第２の温度検知素子が温度制御を開始する
温度、前記第２の温度検知素子による一定温度制御中に
前記加熱体へ入力する電力の比率、および記録紙の重送
時における温度制御条件のいずれかを決定することを特
徴とする。Further, according to a twenty-eighth aspect of the present invention, in the fixing method according to any one of the twenty-second to twenty-seventh aspects, the second temperature is controlled during the constant temperature control by the output of the first temperature detecting element. The temperature at which the temperature detection element starts temperature control, the ratio of the power input to the heating element during the constant temperature control by the second temperature detection element, and the temperature control condition when the recording paper is multi-fed. It is characterized in that it is determined.
【００４６】本発明による作用として、非通紙時に温度
応答性が低い副温度検知素子の出力によって一定温調制
御をしたり、あるいは第１の温度検知素子の電力制御が
多段階制御の場合に副温度検知素子の電力制御を１段階
のオン／オフ制御を実行して非通紙時に副温度検知素子
の出力によって一定温調制御したりする場合、同時に第
１の温度検知素子で温度リップルをモニターすることに
より、加熱体に供給される定格電源電力をより精密に見
積もることが可能となり、前記温度リップルの振幅の大
小に応じて記録紙通紙時における適切な電力制御を決定
することにより、前記記録紙先端テカリや定着リップル
の発生を抑制することができる。As an effect of the present invention, the constant temperature control is performed by the output of the sub-temperature detecting element having low temperature responsiveness when paper is not passed, or the power control of the first temperature detecting element is multi-step control. In the case where the power control of the sub-temperature detecting element is performed in one-stage on / off control to perform constant temperature control by the output of the sub-temperature detecting element during non-sheet passing, at the same time, the temperature ripple is controlled by the first temperature detecting element. By monitoring, it is possible to more accurately estimate the rated power supply power supplied to the heating element, by determining appropriate power control during recording paper passing according to the magnitude of the amplitude of the temperature ripple, It is possible to suppress the occurrence of the shining edge of the recording paper and the occurrence of fixing ripple.
【００４７】また、記録紙通紙中の重送時対応制御を決
定することにより、重送時の定着装置中の加熱体や加圧
ローラのダメージを最小限に抑えることができる。Further, by determining the corresponding control at the time of double feeding during recording paper feeding, it is possible to minimize damage to the heating element and the pressure roller in the fixing device at the time of double feeding.
【００４８】[0048]
【発明の実施の形態】（第１実施形態）以下に、本発明
の実施の形態について図面を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
【００４９】図１は、本実施形態に係る定着装置の概略
構成を示す図であり、図１（ａ）は、本発明に基づく、
１００Ｖ圏に提供される画像形成装置中に搭載されるオ
ンデマンド方式の定着装置の概略構成透過斜視図を示
す。FIG. 1 is a view showing a schematic configuration of a fixing device according to this embodiment. FIG.
FIG. 2 is a transparent perspective view of a schematic configuration of an on-demand type fixing device mounted in an image forming apparatus provided in a 100V area.
【００５０】本実施形態の定着装置は加圧ローラ駆動式
であり、加熱体１０を保持させたフィルム支持手段（図
示せず）を、円筒状の耐熱性フィルム１５を介して加圧
ローラ１７に予め定められた押圧力をもって圧接させ、
加熱体１０との間に定着ニップ部Ｎを形成している。The fixing device of this embodiment is of a pressure roller drive type, and a film supporting means (not shown) holding the heating element 10 is connected to a pressure roller 17 via a cylindrical heat-resistant film 15. Pressure contact with a predetermined pressing force,
A fixing nip portion N is formed between the heating element 10 and the heating element 10.
【００５１】加圧ローラ１７の回転駆動による加圧ロー
ラ１７と耐熱性フィルム１５の外面との摩擦力により耐
熱性フィルム１５に回転力が作用して、耐熱性フィルム
１５が加熱体１０を保持させたフィルム支持手段の外回
りを矢印Ａの方向に回転する。The rotational force acts on the heat-resistant film 15 due to the frictional force between the pressure roller 17 and the outer surface of the heat-resistant film 15 due to the rotational drive of the pressure roller 17, and the heat-resistant film 15 holds the heater 10. The outer periphery of the film supporting means is rotated in the direction of arrow A.
【００５２】円筒状の耐熱性フィルム１５は、例えば厚
み３０μｍ〜１００μｍ程度のポリイミドを基層とした
薄膜筒で、基層の上に導電性プライマーを介してＰＦ
Ａ，ＰＴＦＥ等のコートが施されており、トナーとの離
型性を保っている。The cylindrical heat-resistant film 15 is, for example, a thin-film cylinder having a thickness of about 30 μm to about 100 μm based on polyimide.
A coat such as A or PTFE is applied, and the releasability from the toner is maintained.
【００５３】図１（ｂ）は、本実施形態に係る定着装置
中の加熱体表面（発熱体側）の一部切欠き概略図を示
す。加熱体１０は、ヒータ基板１２と、ヒータ基板１２
の片面側に形成した抵抗発熱体（通電発熱体）パターン
１３と、抵抗発熱体パターン１３を被覆させた表面保護
層１１と、給電電極パターン２４等とから成る。FIG. 1B is a partially cutaway schematic view of the surface of the heating element (heating element side) in the fixing device according to the present embodiment. The heater 10 includes a heater substrate 12 and a heater substrate 12.
A heating element (electric heating element) pattern 13 formed on one side of the above, a surface protection layer 11 coated with the resistance heating element pattern 13, a power supply electrode pattern 24, and the like.
【００５４】ヒータ基板１２は、被加熱材としての記録
紙Ｐの搬送・移動方向Ａに対して直行する方向を長手と
する横長・薄肉の形状を有し、例えば、長さ２７０ｍ
ｍ、幅７．７８ｍｍ、および厚さ０．６３５ｍｍの、ア
ルミナ等の耐熱性・電気絶縁性・低熱容量のセラミック
基材が使用される。The heater substrate 12 has a horizontally long and thin shape whose longitudinal direction is perpendicular to the conveying / moving direction A of the recording paper P as a material to be heated.
A heat-resistant, electrically-insulating, and low-heat-capacity ceramic base material such as alumina having an m, a width of 7.78 mm, and a thickness of 0.635 mm is used.
【００５５】加熱体１０への通電加熱は、図１（ａ）に
示す温度制御手段２１によって適宜に制御することがで
きる。温度制御手段２１は２系統に分かれ、それぞれ、
加熱体１０の発熱体１３が形成具備されている側を加熱
体表面として、加熱体１０の裏面の記録紙Ｐ中央部に当
たる部分に取り付けられた第２の温度検知素子１４ａ
（以下、「メインサーミスタ」という）と加熱領域の端
部に当たる部分に取り付けられた第１の温度検知素子１
４ｂ（以下、「サブサーミスタ」という）と、これらの
サーミスタ１４ａおよび１４ｂがそれぞれ検出する温度
に基づいてトライアック２２を制御することにより、加
熱体１０に対する通電を制御するＣＰＵ２３とを有す
る。The electric heating of the heating element 10 can be appropriately controlled by the temperature control means 21 shown in FIG. The temperature control means 21 is divided into two systems,
A second temperature detecting element 14a attached to a portion of the back surface of the heating element 10 corresponding to the central portion of the recording paper P, with the side of the heating element 10 where the heating element 13 is formed and provided as a heating element surface.
(Hereinafter, referred to as “main thermistor”) and a first temperature detecting element 1 attached to a portion corresponding to an end of a heating area.
4b (hereinafter referred to as “sub thermistor”), and a CPU 23 that controls energization of the heating element 10 by controlling the triac 22 based on the temperatures detected by the thermistors 14a and 14b, respectively.
【００５６】ここで、サブサーミスタ１４ｂはメインサ
ーミスタ１４ａよりも温度応答性が低いように構成され
ている。その方法としては、サーミスタ自身の熱容量を
異ならせる方法、サーミスタを加熱体１０の裏面に接着
する部材の熱伝導率を異ならせる方法、またはメインサ
ーミスタ１４ａを設置させるのに対してサブサーミスタ
１４ｂをポリイミドコートなどして押し当てる方法等、
種々の方法がある。Here, the sub thermistor 14b is configured to have a lower temperature response than the main thermistor 14a. As the method, a method of changing the heat capacity of the thermistor itself, a method of changing the thermal conductivity of a member that adheres the thermistor to the back surface of the heating body 10, or a method of installing the main thermistor 14a while using the sub thermistor 14b as a polyimide How to press with a coat etc.
There are various methods.
【００５７】ＣＰＵ２３による電力制御には、電源波形
の半波ごとに通電の実行および停止を制御するゼロクロ
ス波数制御や、電源波形の半波ごとに通電する位相角を
制御する位相制御等の多段階電力制御方法が使用され
る。The power control by the CPU 23 includes multi-steps such as zero-crossing wave number control for controlling the execution and stop of energization for each half-wave of the power supply waveform, and phase control for controlling the phase angle to be energized for each half-wave of the power supply waveform. A power control method is used.
【００５８】いま、加圧ローラ１７の回転により耐熱性
フィルム１５が回転し、温度制御手段２１によって加熱
体１０が通電加熱されることにより、加熱体１０が予め
定められた温度に昇温した状態において、耐熱性フィル
ム１５と加圧ローラ１７との間にある定着ニップ部Ｎ
に、被加熱材である未定着トナー像Ｔを担持した記録紙
Ｐが投入される。すると、加熱体１０の熱が耐熱性フィ
ルム１５を介して記録紙Ｐに付与され、未定着トナー像
Ｔが記録紙Ｐ面に熱定着される。定着ニップ部Ｎを通過
した記録紙Ｐは、耐熱性フィルム１５の面から曲率分離
されて搬送される。Now, the heat-resistant film 15 is rotated by the rotation of the pressure roller 17, and the heater 10 is energized and heated by the temperature control means 21 to raise the temperature of the heater 10 to a predetermined temperature. The fixing nip portion N between the heat-resistant film 15 and the pressure roller 17
Then, a recording paper P carrying an unfixed toner image T as a material to be heated is loaded. Then, the heat of the heating body 10 is applied to the recording paper P via the heat-resistant film 15, and the unfixed toner image T is thermally fixed on the recording paper P surface. The recording paper P that has passed through the fixing nip N is conveyed after being separated from the surface of the heat-resistant film 15 by a curvature.
【００５９】本実施形態に係る画像形成装置中には、記
録紙の重送を検知する不図示の重送検知手段がさらに設
けられている。The image forming apparatus according to the present embodiment is further provided with a double feed detecting means (not shown) for detecting double feeding of recording paper.
【００６０】次に、本実施形態の定着装置を備えた画像
形成装置を用いて、定着装置に投入される入力電圧検知
方法について説明する。Next, a method of detecting an input voltage applied to the fixing device using the image forming apparatus having the fixing device of the present embodiment will be described.
【００６１】まず、本実施形態に係る画像形成装置に対
して、外部電源から画像形成装置内部に配分される電圧
経路の略図を図２に示す。電源電圧は、不図示のＡＣド
ライバを介して定着装置中の加熱体１０へ直接入力され
る。画像形成装置内部の電源回路３１は、外部の入力電
圧から電子写真コントローラ３２の駆動用の５Ｖと、画
像形成エンジン部３３内の給排紙駆動部、及び一次帯電
高圧・現像高圧・転写高圧を駆動する２４Ｖを出力する
ものである。この電源回路３１としては、外部からの入
力電圧に依らずに上記ＤＣ電圧を出力するユニバーサル
電源が用いられる。First, FIG. 2 is a schematic diagram of a voltage path distributed from an external power supply to the inside of the image forming apparatus for the image forming apparatus according to the present embodiment. The power supply voltage is directly input to the heating element 10 in the fixing device via an AC driver (not shown). A power supply circuit 31 inside the image forming apparatus converts 5 V for driving the electrophotographic controller 32, a supply / discharge driving unit in the image forming engine unit 33, a primary charging high voltage, a developing high voltage, and a transfer high voltage from an external input voltage. It outputs 24V to be driven. As the power supply circuit 31, a universal power supply that outputs the DC voltage regardless of an external input voltage is used.
【００６２】定着装置に入力される電源電圧の検知方法
は次のように行なわれる。画像形成装置の電源をオンす
ると、各部の異常有無を検知するために各駆動系を数秒
間駆動させる「前多回転」と呼ばれる制御を行なうが、
この前多回転中に、定着装置中の加熱体１０に対して全
波通電をしてサブサーミスタ１４ｂにて一定温調制御を
行ない、同時にメインサーミスタ１４ａによって温度検
出をする。このときのサブサーミスタ１４ｂの制御温度
は、印刷時の温度よりも十分低いものとする。The method of detecting the power supply voltage input to the fixing device is performed as follows. When the power supply of the image forming apparatus is turned on, a control called "pre-multi-rotation" is performed in which each drive system is driven for several seconds to detect whether or not each part is abnormal.
During the preceding multiple rotations, the full-wave current is supplied to the heating element 10 in the fixing device, the sub-thermistor 14b performs constant temperature control, and at the same time, the temperature is detected by the main thermistor 14a. At this time, the control temperature of the sub thermistor 14b is sufficiently lower than the printing temperature.
【００６３】図３は、上述した一定温調制御中の各サー
ミスタの検出温度の様子を示す図で、図３（ａ）は小電
力の場合、図３（ｂ）は大電力の場合の検出温度の様子
を示す。サブサーミスタ１４ｂの温度応答性は、メイン
サーミスタ１４ａのそれよりも低いので、全波通電中の
サブサーミスタ１４ｂの検出温度はメインサーミスタ１
４ａの検出温度よりも低い温度として検出される。各々
の温度応答性の違いから、サブサーミスタ１４ｂによる
一定温調中は、サブサーミスタ１４ｂの検出温度リップ
ルＴｂｗが小さいのに対してメインサーミスタ１４ａの
温度リップルＴａｗは大きくなる。そして、このＴａｗ
の大きさは入力電圧に比例するので、各サーミスタの温
度応答性に適当な差をつけることで、精密な入力電圧検
知が可能となる。FIG. 3 is a diagram showing the state of the detected temperature of each thermistor during the constant temperature control described above. FIG. 3 (a) shows the case of low power, and FIG. 3 (b) shows the case of high power. The state of temperature is shown. Since the temperature responsiveness of the sub thermistor 14b is lower than that of the main thermistor 14a, the detected temperature of the sub thermistor 14b during full-wave energization is lower than that of the main thermistor 1b.
It is detected as a temperature lower than the detection temperature of 4a. Due to the difference in the respective temperature responses, during the constant temperature control by the sub thermistor 14b, the temperature ripple Tbw of the main thermistor 14a increases while the detected temperature ripple Tbw of the sub thermistor 14b is small. And this Taw
Is proportional to the input voltage, it is possible to accurately detect the input voltage by making an appropriate difference in the temperature response of each thermistor.
【００６４】図４は、本実施例における定着制御フロー
チャートを示す。まず、ステップＳ４１で装置電源をオ
ンし、ステップＳ４２で画像形成装置の前多回転時にサ
ブサーミスタ１４ｂの一定温調制御によって前記入力電
圧検知を行なったのち、検知入力電圧値に応じて印刷時
の温調制御テーブルを決定する（ステップＳ４３）。ス
テップＳ４４において選択されるＴａｂｌｅ Ｉ、IIお
よびIII はそれぞれ、検知入力電圧８５〜１１０Ｖ、１
１０〜１３０Ｖおよび１３０Ｖ以上の電圧範囲に応じた
印刷時電力制御テーブルであり、その詳細の一部を表１
に示す。FIG. 4 shows a fixing control flowchart in this embodiment. First, in step S41, the apparatus power is turned on. In step S42, the input voltage is detected by the constant temperature control of the sub thermistor 14b during the pre-multi rotation of the image forming apparatus. A temperature control table is determined (step S43). Tables I, II, and III selected in step S44 are detection input voltages 85 to 110V, 1
10 is a printing power control table corresponding to a voltage range of 10 to 130 V and 130 V or more.
Shown in
【００６５】[0065]
【表１】 [Table 1]
【００６６】表１によると、メインサーミスタ１４ａ
の一定温調制御開始温度、メインサーミスタ１４ａの
一定温調制御中の加熱体入力電力比率（Ｔａｂｌｅ Ｉ
の場合を１とする）、および記録紙の重送時の対応制
御の条件について、各テーブルで異ならせている。According to Table 1, the main thermistor 14a
, The heating element input power ratio (Table I) during the constant temperature control of the main thermistor 14a.
Is set to 1), and the conditions of the corresponding control when the recording paper is multi-fed are different in each table.
【００６７】画像形成装置にプリント信号が入力される
と（ステップＳ４５）、加熱体通電をオン状態にする
（ステップＳ４６）。そして、定着装置の温調はメイン
サーミスタ１４ａの検出温度により制御され（ステップ
Ｓ４７）、選択された適正電力テーブルに従って、トナ
ー画像を担持した記録紙Ｐが定着される（ステップＳ４
８）。最後に、加熱体通電をオフする（ステップＳ４
９）。When a print signal is input to the image forming apparatus (step S45), the heating element is turned on (step S46). The temperature control of the fixing device is controlled by the detected temperature of the main thermistor 14a (step S47), and the recording paper P carrying the toner image is fixed according to the selected appropriate power table (step S4).
8). Finally, the heating element is turned off (step S4).
9).
【００６８】このような方法により、定格電源電圧が大
きい場合においても、定着・排紙された印刷画像は、電
力制御が適正であるために先端のテカリや定着リップル
等が生じない良好な品質が得られた。また記録紙の重送
時の定着制御も適正になされるために、定格電源電圧が
大きい場合に記録紙が重送したとしても、加熱体１０や
加圧ローラ１７を含む定着装置の各部品がダメージを受
けることはなかった。According to such a method, even when the rated power supply voltage is large, the quality of the printed image fixed and discharged does not cause shininess or fixing ripple at the front end due to proper power control. Obtained. In addition, since the fixing control at the time of multi-feeding of the recording paper is properly performed, even if the recording paper is multi-fed when the rated power supply voltage is large, the respective components of the fixing device including the heating body 10 and the pressure roller 17 may be used. No damage was taken.
【００６９】以上、本実施形態の定着装置では、メイン
サーミスタよりも温度応答性の低いサブサーミスタで非
通紙時に一定温調制御をすることによって定格電源電圧
を精密に見積もり、その入力電圧に応じた温調制御テー
ブルを選択して、印刷時にメインサーミスタの温度制御
で記録紙を定着させることにより、定格電源電圧の大小
に依らない適正な電力制御が可能になる。このため、定
格電源電圧が大きい場合の目標温度からのオーバーシュ
ートによる記録紙先端テカリや、定着リップルの発生と
いった上述の課題を抑制することができる。As described above, in the fixing device according to the present embodiment, the rated power supply voltage is accurately estimated by performing constant temperature control during non-sheet passing by the sub thermistor having a lower temperature response than the main thermistor, and according to the input voltage. By selecting the temperature control table and fixing the recording paper by controlling the temperature of the main thermistor at the time of printing, it is possible to perform appropriate power control regardless of the magnitude of the rated power supply voltage. For this reason, it is possible to suppress the above-described problems such as the occurrence of shining at the leading edge of the recording paper due to overshoot from the target temperature and the occurrence of fixing ripple when the rated power supply voltage is large.
【００７０】また、記録紙の重送時における定着装置中
の各部品のダメージを防止することができる。Further, it is possible to prevent each component in the fixing device from being damaged when the recording paper is multi-fed.
【００７１】（第２実施形態）本実施例２における定着
装置の構成は、メインサーミスタ１４ａの温度応答性は
サブサーミスタ１４ｂのそれよりも良く、メインサーミ
スタ１４ａによる温調制御は波数制御や位相制御をもっ
て電力制御する多段階制御であるのに対して、サブサー
ミスタ１４ｂによる温調制御は１段階のオン／オフ制御
である点を除いては、上述の実施形態と共通である。ま
た、各サーミスタの温度応答性を異ならせる方法とし
て、上述の実施形態の方法を採用する。(Second Embodiment) In the configuration of the fixing device according to the second embodiment, the temperature response of the main thermistor 14a is better than that of the sub thermistor 14b, and the temperature control by the main thermistor 14a is wave number control or phase control. In contrast to the multi-stage control in which power control is performed by using the sub-thermistor 14b, the temperature control by the sub-thermistor 14b is the same as the above-described embodiment except that it is a one-stage on / off control. Further, the method of the above-described embodiment is adopted as a method for making the temperature responsiveness of each thermistor different.
【００７２】本実施形態における定着装置の制御は、メ
インサーミスタ１４ａによる温調制御方式が多段階制御
であり、サブサーミスタ１４ｂによる温調制御方式が１
段階オン／オフ制御であることから、温調制御をつかさ
どるＣＰＵ２３では各サーミスタの温調制御時において
制御方式を切り替えるプログラムが実装される。In the control of the fixing device in this embodiment, the temperature control method using the main thermistor 14a is multi-stage control, and the temperature control method using the sub thermistor 14b is one-step control.
Because of the step-on / off control, the CPU 23 that controls the temperature control implements a program that switches the control method during the temperature control of each thermistor.
【００７３】本実施形態においても、入力電圧検知手段
は上述の実施形態と同様であり、画像形成装置の前多回
転中にサブサーミスタ１４ｂによって印刷時の目標温度
よりも十分低い一定温調制御を行なって入力電圧を見積
もる。In this embodiment, the input voltage detecting means is the same as that of the above-described embodiment, and the sub-thermistor 14b controls the constant temperature control sufficiently lower than the target temperature at the time of printing by the sub-thermistor 14b during the multiple rotations of the image forming apparatus. Go and estimate the input voltage.
【００７４】ただし、本実施形態の場合は、サブサーミ
スタ１４ｂの一定温調制御中は１段階のオン／オフ制御
を行なっているため、入力電圧の見積もりは、メインサ
ーミスタ１４ａの検出温度振幅を用いてもよいし、サブ
サーミスタ１４ｂのオン／オフ周期の時間間隔を用いて
もよい。あるいは、両方を組み合わせて見積もること
で、より精密な見積もりが可能となるのが特徴である。However, in the case of the present embodiment, one-stage on / off control is performed during the constant temperature control of the sub thermistor 14b, so that the input voltage is estimated using the detected temperature amplitude of the main thermistor 14a. Alternatively, a time interval of the ON / OFF cycle of the sub thermistor 14b may be used. Alternatively, it is a feature that more accurate estimation is possible by estimating a combination of both.
【００７５】本実施形態における、非通紙時のサブサー
ミスタ１４ｂによるオン／オフ制御した場合の各サーミ
スタの検出温度の様子は、図３に示すものと酷似するた
め図示を省略する。また、入力電圧検知後の印刷制御は
上述の実施形態と同様である。In the present embodiment, the state of the detected temperature of each thermistor when the on / off control is performed by the sub thermistor 14b during non-sheet passing is very similar to that shown in FIG. The print control after the detection of the input voltage is the same as in the above-described embodiment.
【００７６】本実施形態の定着装置を用いることによ
り、上述の実施形態と同様の、あるいはそれ以上の精密
さで加熱体への入力電圧を見積もることができるという
作用、効果が得られる。By using the fixing device of this embodiment, an operation and an effect that the input voltage to the heating element can be estimated with the same or higher precision as in the above-described embodiment can be obtained.
【００７７】[0077]
【発明の効果】以上説明したように、本発明によれば、
加熱体と、一対の定着回転体とを有し、該一対の定着回
転体を加圧接触させて形成される圧接部を通過する記録
紙上のトナー画像を前記加熱体からの熱によって加熱定
着する定着装置であって、前記加熱体の温度を検知する
複数の温度検知素子と、非通紙時に前記複数の温度検知
素子のうちの第１の温度検知素子の出力に基づいて一定
温度制御を実行し、通紙時に前記複数の温度検知素子の
うちの第２の温度検知素子の出力に基づいて定着温度制
御を実行する温度制御手段とを具えたので、それぞれの
サーミスタの温度応答速度の違いや温調制御方式の違い
を利用して定格電源電圧をより精密に見積もることが可
能となる。As described above, according to the present invention,
It has a heating body and a pair of fixing rotators, and heat-fixes a toner image on recording paper passing through a pressure contact portion formed by bringing the pair of fixing rotators into pressure contact with heat from the heating body. A fixing device that performs a constant temperature control based on an output of a plurality of temperature detecting elements for detecting a temperature of the heating element and a first temperature detecting element of the plurality of temperature detecting elements when paper is not passed; And temperature control means for executing fixing temperature control based on the output of the second temperature detection element of the plurality of temperature detection elements during paper passing, so that the temperature response speed of each thermistor differs. It is possible to more accurately estimate the rated power supply voltage by using the difference in the temperature control method.
【００７８】また、前記第１の温度検知素子は前記加熱
体の加熱領域の端部に取付けられ、前記第２の温度検知
素子は前記加熱体の加熱領域の中央部に取付けられたの
で、定格電源電圧の大小に依らない適正な電力制御が可
能になる。Further, the first temperature detecting element is attached to an end of the heating area of the heating element, and the second temperature detecting element is attached to the center of the heating area of the heating element. Appropriate power control can be performed regardless of the magnitude of the power supply voltage.
【００７９】また、前記加熱体の温度に対する前記第２
の温度検知素子の温度応答速度は、前記第１の温度検知
素子の温度応答速度よりも高いので、各サーミスタの応
答性に適当な差をつけることにより、精密な入力電圧を
検出することが可能となる。Further, the second temperature with respect to the temperature of the heating element
Since the temperature response speed of the temperature sensing element is higher than the temperature response speed of the first temperature sensing element, it is possible to detect a precise input voltage by making an appropriate difference in the response of each thermistor. Becomes
【００８０】また、前記温度制御手段は、非通紙時にお
ける一定温度制御中に、前記第２の温度検知素子が検出
する温度振幅に応じて通紙時の温度制御条件を決定する
ことを特徴とするので、画像形成装置の前多回転時に入
力電圧検知を行なった後、検知入力電圧値に応じて印刷
時の温調制御を決定することができる。Further, the temperature control means determines the temperature control condition at the time of paper passing according to the temperature amplitude detected by the second temperature detecting element during the constant temperature control at the time of non-paper passing. Therefore, after the input voltage is detected during the pre-multiple rotations of the image forming apparatus, the temperature control for printing can be determined according to the detected input voltage value.
【００８１】また、前記温度制御手段は、前記第２の温
度検知素子が検出する温度に基づいて前記加熱体に入力
される電源電圧を見積もり、前記見積もり後の電源電圧
に応じて通紙時の温度制御条件を決定するので、検知し
た入力電圧に応じて通紙中の定着電力制御を決定するこ
とによって、定格電源電圧が大きい地域で発生してい
た、定着温度オーバーシュートや温度リップルに起因す
る定着過多や定着リップルを防止することができる。Further, the temperature control means estimates a power supply voltage input to the heating element based on the temperature detected by the second temperature detecting element, and determines a power supply voltage when the paper is passed according to the estimated power supply voltage. Since the temperature control conditions are determined, the fixing power control during paper feeding is determined according to the detected input voltage, which is caused by the fixing temperature overshoot and temperature ripple occurring in an area where the rated power supply voltage is large. Excessive fixing and fixing ripple can be prevented.
【００８２】また、前記温度制御手段は、前記第２の温
度検知素子が温度制御を開始する温度、前記第２の温度
検知素子による温度制御中に前記加熱体へ入力する前記
第２の温度検知素子の検知出力に応じた供給電力、およ
び記録紙の重送時における温度制御条件のいずれかを決
定するので、定格電源電圧が大きい場合や、画像形成装
置内に何らかの記録紙の重送検知手段を有する場合に、
記録紙の重送時に対応した定着制御を入力電圧に応じて
決定することが可能となる。結果として、定着部品のダ
メージを防止できる。Further, the temperature control means includes: a temperature at which the second temperature detecting element starts temperature control; and a second temperature detecting input to the heating element during temperature control by the second temperature detecting element. The power supply according to the detection output of the element and the temperature control condition when the recording paper is multi-fed are determined. Therefore, when the rated power supply voltage is large, or when some kind of recording paper multi-feed detecting means is provided in the image forming apparatus. If you have
It becomes possible to determine the fixing control corresponding to the double feeding of the recording paper according to the input voltage. As a result, damage to the fixing component can be prevented.
【００８３】また、薄膜フィルムを介して記録紙を加熱
する加熱体と、該加熱体との間に形成される圧接部に導
入された該記録紙を、前記薄膜フィルムを介して前記加
熱体に加圧することにより、通紙時に前記記録紙上のト
ナー画像を加熱定着する加圧ローラとを有する定着装置
であって、前記加熱体の温度を検知する複数の温度検知
素子と、非通紙時に前記複数の温度検知素子のうちの第
１の温度検知素子の出力により一定温度制御を実行し、
通紙時に前記複数の温度検知素子のうちの第２の温度検
知素子の出力により定着温度制御を実行する温度制御手
段とを具えたので、定格電源電圧が異なる地域において
も、安定した画像品質を保つことが可能となる。Further, a heating element for heating the recording paper through the thin film, and the recording paper introduced into the pressure contact portion formed between the heating element and the heating element are connected to the heating element via the thin film. A fixing roller having a pressure roller for heating and fixing the toner image on the recording sheet when the sheet is passed, wherein a plurality of temperature detecting elements for detecting the temperature of the heating element; and Performing a constant temperature control by an output of a first temperature detection element of the plurality of temperature detection elements;
Temperature control means for executing fixing temperature control by the output of the second temperature detection element of the plurality of temperature detection elements during paper passing, so that stable image quality can be obtained even in regions where the rated power supply voltage is different. It is possible to keep.
【００８４】また、前記第１の温度検知素子による非通
紙時の一定温度制御は一段階の加熱体への通電のオン／
オフ制御であり、前記第２の温度検知素子による通紙時
の定着温度制御は多段階電力制御であるので、入力電圧
の見積もりに、メインサーミスタの検出温度振幅や、サ
ブサーミスタのオン／オフ周期の時間間隔を使用でき
る。The constant temperature control by the first temperature detecting element at the time of non-sheet passing is performed by turning on / off the power supply to the heating element in one step.
Since the fixing temperature control at the time of sheet passing by the second temperature detecting element is a multi-step power control, the input voltage is estimated based on the detected temperature amplitude of the main thermistor and the on / off cycle of the sub thermistor. Time intervals can be used.
【００８５】また、前記温度制御手段は、前記第１の温
度検知素子の出力による一定温度制御中に、前記第２の
温度検知素子の振幅周期の時間間隔の大小に応じて通紙
時の温度制御条件を決定するので、精密な入力電圧の見
積もりが可能となる。Further, the temperature control means, during the constant temperature control based on the output of the first temperature detecting element, determines the temperature at the time of paper feeding according to the magnitude of the time interval of the amplitude cycle of the second temperature detecting element. Since the control conditions are determined, it is possible to accurately estimate the input voltage.
【図１】本発明の一実施形態に係る定着装置の概略構成
を示す図で、（ａ）は定着装置の概略透過斜視図、
（ｂ）は定着装置中の加熱体表面（発熱体側）の一部切
欠き概略図である。FIG. 1 is a diagram showing a schematic configuration of a fixing device according to an embodiment of the present invention, wherein (a) is a schematic transparent perspective view of the fixing device,
FIG. 2B is a partially cutaway schematic view of a heating element surface (heating element side) in the fixing device.
【図２】本発明の一実施形態に基づく画像形成装置にお
ける電圧配分図である。FIG. 2 is a voltage distribution diagram in the image forming apparatus according to one embodiment of the present invention.
【図３】（ａ）は小電力の場合、（ｂ）は大電力の場合
の前多回転中のサブサーミスタ温調制御時のメイン・サ
ブサーミスタの検出温度を示す図である。3A is a diagram showing a detected temperature of a main / sub thermistor at the time of sub-thermistor temperature adjustment control during pre-multi-rotation in a case of low power, and FIG.
【図４】本発明の一実施形態に基づく画像形成装置にお
ける定着制御フローチャートである。FIG. 4 is a fixing control flowchart in the image forming apparatus according to the embodiment of the present invention.
１０ 加熱体 １１ 表面保護層 １２ ヒータ基板 １３ 抵抗発熱体パターン １４ａ メインサーミスタ １４ｂ サブサーミスタ １５ 耐熱性フィルム １７ 加圧ローラ ２１ 温度制御手段 ２２ トライアック ２３ 温度制御用ＣＰＵ ２４ 給電電極パターン ３１ 電源回路 ３２ 電子写真コントローラ ３３ 画像形成エンジン部 Ａ 矢印 Ｎ 定着ニップ部 Ｐ 記録紙 Ｔ 未定着トナー像 Ｔａｗ メインサーミスタの検出温度振幅 Ｔｂｗ サブサーミスタの検出温度振幅 DESCRIPTION OF SYMBOLS 10 Heating body 11 Surface protective layer 12 Heater substrate 13 Resistance heating element pattern 14a Main thermistor 14b Sub thermistor 15 Heat resistant film 17 Pressure roller 21 Temperature control means 22 Triac 23 Temperature control CPU 24 Power supply electrode pattern 31 Power supply circuit 32 Electrophotography Controller 33 Image forming engine section A Arrow N Fixing nip section P Recording paper T Unfixed toner image Taw Detected temperature amplitude of main thermistor Tbw Detected temperature amplitude of sub thermistor
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H033 AA24 BA32 BE03 CA07 CA23 CA30 CA32 CA45 CA48 3K058 AA22 AA34 AA42 AA53 BA18 CA03 CA12 CA23 CA61 CA92 CB04 CB09 CB10 CB22 CB26 CC09 CE02 CE13 CE19 DA04 GA06 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H033 AA24 BA32 BE03 CA07 CA23 CA30 CA32 CA45 CA48 3K058 AA22 AA34 AA42 AA53 BA18 CA03 CA12 CA23 CA61 CA92 CB04 CB09 CB10 CB22 CB26 CC09 CE02 CE13 CE19 DA04 GA06
Claims (28)
該一対の定着回転体を加圧接触させて形成される圧接部
を通過する記録紙上のトナー画像を前記加熱体からの熱
によって加熱定着する定着装置であって、前記加熱体の
温度を検知する複数の温度検知素子と、非通紙時に前記
複数の温度検知素子のうちの第１の温度検知素子の出力
に基づいて一定温度制御を実行し、通紙時に前記複数の
温度検知素子のうちの第２の温度検知素子の出力に基づ
いて定着温度制御を実行する温度制御手段とを具えたこ
とを特徴とする定着装置。A heating unit and a pair of fixing rotators;
A fixing device that heats and fixes a toner image on a recording sheet passing through a pressure contact portion formed by pressing the pair of fixing rotators by heat from the heater, and detects a temperature of the heater. A plurality of temperature detecting elements, and performing constant temperature control based on an output of a first one of the plurality of temperature detecting elements during non-sheet passing, and performing a constant temperature control among the plurality of temperature detecting elements during sheet passing. A fixing device for controlling a fixing temperature based on an output of the second temperature detecting element.
に取付けられ、前記第２の温度検知素子は前記加熱体の
加熱領域の中央部に取付けられたことを特徴とする定着
装置。2. The fixing device according to claim 1, wherein the first temperature detecting element is attached to an end of a heating area of the heating element, and wherein the second temperature detecting element is attached to a heating area of the heating element. A fixing device attached to a central portion of the fixing device.
いて、 前記加熱体の温度に対する前記第２の温度検知素子の温
度応答速度は、前記第１の温度検知素子の温度応答速度
よりも高いことを特徴とする定着装置。3. The fixing device according to claim 1, wherein a temperature response speed of the second temperature detection element with respect to a temperature of the heating element is higher than a temperature response speed of the first temperature detection element. A fixing device, comprising:
の定着装置において、 前記温度制御手段は、非通紙時における一定温度制御中
に、前記第２の温度検知素子が検出する温度振幅に応じ
て通紙時の温度制御条件を決定することを特徴とする定
着装置。4. The fixing device according to claim 1, wherein the temperature control unit detects the temperature detected by the second temperature detection element during constant temperature control during non-sheet passing. A fixing device, wherein a temperature control condition at the time of paper passing is determined according to the amplitude.
る温度に基づいて前記加熱体に入力される電源電圧を見
積もり、前記見積もり後の電源電圧に応じて通紙時の温
度制御条件を決定することを特徴とする定着装置。5. The fixing device according to claim 4, wherein the temperature control unit estimates a power supply voltage input to the heating element based on a temperature detected by the second temperature detection element, and after the estimation. A temperature control condition at the time of paper passing is determined according to the power supply voltage of the fixing device.
の定着装置において、 前記温度制御手段は、前記第２の温度検知素子が温度制
御を開始する温度、前記第２の温度検知素子による温度
制御中に前記加熱体へ入力する前記第２の温度検知素子
の検知出力に応じた供給電力、および記録紙の重送時に
おける温度制御条件のいずれかを決定することを特徴と
する定着装置。6. The fixing device according to claim 1, wherein the temperature control unit is configured to control a temperature at which the second temperature detection element starts temperature control, and the second temperature detection element. And f) determining a supply power corresponding to a detection output of the second temperature detection element input to the heating element during the temperature control according to (1), and a temperature control condition at the time of multi-feeding of recording paper. apparatus.
加熱体と、該加熱体との間に形成される圧接部に導入さ
れた該記録紙を、前記薄膜フィルムを介して前記加熱体
に加圧することにより、通紙時に前記記録紙上のトナー
画像を加熱定着する加圧ローラとを有する定着装置であ
って、前記加熱体の温度を検知する複数の温度検知素子
と、非通紙時に前記複数の温度検知素子のうちの第１の
温度検知素子の出力により一定温度制御を実行し、通紙
時に前記複数の温度検知素子のうちの第２の温度検知素
子の出力により定着温度制御を実行する温度制御手段と
を具えたことを特徴とする定着装置。7. A heating element for heating recording paper via a thin film, and the recording paper introduced into a pressure contact portion formed between the heating element and the heating element via the thin film. A fixing roller having a pressure roller for heating and fixing the toner image on the recording sheet when the sheet is passed, wherein a plurality of temperature detecting elements for detecting the temperature of the heating element; and The fixed temperature control is executed by the output of the first temperature detecting element of the plurality of temperature detecting elements, and the fixing temperature control is executed by the output of the second temperature detecting element of the plurality of temperature detecting elements when the paper is passed. And a temperature control means for controlling the temperature of the fixing device.
に取付けられ、前記第２の温度検知素子は前記加熱体の
加熱領域の中央部に取付けられることを特徴とする定着
装置。8. The fixing device according to claim 7, wherein the first temperature detecting element is attached to an end of a heating area of the heating element, and the second temperature detecting element is attached to a heating area of the heating element. A fixing device attached to a central portion of the fixing device.
度応答速度は、前記第１の温度検知素子の温度応答速度
よりも高いことを特徴とする定着装置。9. The fixing device according to claim 8, wherein a temperature response speed of the second temperature detection element with respect to a temperature of the heating element is higher than a temperature response speed of the first temperature detection element. Characteristic fixing device.
は一段階の加熱体への通電のオン／オフ制御であり、前
記第２の温度検知素子による通紙時の定着温度制御は多
段階電力制御であることを特徴とする定着装置。10. The fixing device according to claim 9, wherein the constant temperature control by the first temperature detection element during non-sheet passing is a one-stage on / off control of energization to the heating element. 2. The fixing device according to claim 1, wherein the control of the fixing temperature at the time of sheet passing by the second temperature detecting element is multi-step power control.
記載の定着装置において、 前記温度制御手段は、非通紙時における一定温度制御中
に、前記第２の温度検知素子が検出する温度振幅に応じ
て通紙時の温度制御条件を決定することを特徴とする定
着装置。11. The fixing device according to claim 8, wherein the temperature control unit detects a temperature detected by the second temperature detection element during constant temperature control during non-sheet passing. A fixing device, wherein a temperature control condition at the time of paper passing is determined according to the amplitude.
て、 前記温度制御手段は、前記第２の温度検知素子が検出す
る温度に基づいて前記加熱体に入力される電源電圧を見
積もり、前記見積もり後の電源電圧に応じて通紙時の温
度制御条件を決定することを特徴とする定着装置。12. The fixing device according to claim 11, wherein the temperature control unit estimates a power supply voltage input to the heating element based on a temperature detected by the second temperature detection element, and after the estimation. A temperature control condition at the time of paper passing is determined according to the power supply voltage of the fixing device.
記載の定着装置において、 前記温度制御手段は、前記第１の温度検知素子の出力に
よる一定温度制御中に、前記第２の温度検知素子の振幅
周期の時間間隔の大小に応じて通紙時の温度制御条件を
決定することを特徴とする定着装置。13. The fixing device according to claim 8, wherein the temperature control unit detects the second temperature during a constant temperature control based on an output of the first temperature detection element. A fixing device, wherein a temperature control condition at the time of sheet passing is determined according to a magnitude of a time interval of an amplitude cycle of an element.
記載の定着装置において、 前記温度制御手段は、前記第２の温度検知素子が温度制
御を開始する温度、前記第２の温度検知素子による一定
温度制御中に前記加熱体へ入力する電力の比率、または
記録紙の重送時における温度制御条件のいずれかを決定
することを特徴とする定着装置。14. The fixing device according to claim 8, wherein the temperature control unit controls a temperature at which the second temperature detection element starts temperature control, and the second temperature detection element. And determining a ratio of the power input to the heating element during the constant temperature control according to (1) or a temperature control condition at the time of double feeding of the recording paper.
し、該一対の定着回転体を加圧接触させて形成される圧
接部を通過する記録紙上のトナー画像を前記加熱体から
の熱によって加熱定着する定着装置を使用し、非通紙時
に前記加熱体の温度を検知する第１の温度検知素子の出
力に基づいて一定温度制御を実行し、通紙時に前記加熱
体の温度を検知する第２の温度検知素子の出力に基づい
て定着温度制御を実行することを特徴とする定着方法。15. A heating device, comprising: a pair of fixing rotators; a toner image on a recording sheet passing through a pressure contact portion formed by bringing the pair of fixing rotators into pressure contact with each other; A fixing device that heats and fixes by heat is used, and a constant temperature control is performed based on the output of the first temperature detecting element that detects the temperature of the heating body when paper is not passed, and the temperature of the heating body is decreased when paper is passed. A fixing method comprising: performing a fixing temperature control based on an output of a second temperature detection element to be detected.
て、 前記第１の温度検知素子は前記加熱体の加熱領域の端部
に取付けられ、前記第２の温度検知素子は前記加熱体の
加熱領域の中央部に取付けられたことを特徴とする定着
方法。16. The fixing method according to claim 15, wherein the first temperature detecting element is attached to an end of a heating area of the heating body, and the second temperature detecting element is a heating area of the heating body. A fixing method, wherein the fixing method is attached to a central portion of the fixing device.
法において、 前記加熱体の温度に対する前記第２の温度検知素子の温
度応答速度は、前記第１の温度検知素子の温度応答速度
よりも高いことを特徴とする定着方法。17. The fixing method according to claim 15, wherein a temperature response speed of the second temperature detection element with respect to a temperature of the heating element is higher than a temperature response speed of the first temperature detection element. A fixing method characterized in that:
に記載の定着方法において、 非通紙時における一定温度制御中に、前記第２の温度検
知素子が検出する温度振幅に応じて通紙時の温度制御条
件を決定することを特徴とする定着方法。18. The fixing method according to claim 15, wherein during the constant temperature control during the non-sheet-passing operation, the sheet-passing operation is performed according to the temperature amplitude detected by the second temperature detecting element. A temperature control condition at the time of fixing.
て、 前記通紙時の温度制御条件の決定は、前記第２の温度検
知素子が検出する温度に基づいて前記加熱体に入力され
る電源電圧を見積もり、前記見積もり後の電源電圧に応
じて通紙時の温度制御条件を決定することを含むことを
特徴とする定着方法。19. The fixing method according to claim 18, wherein the determination of the temperature control condition at the time of sheet passing is based on a power supply voltage input to the heating element based on a temperature detected by the second temperature detection element. And estimating the temperature control condition during sheet passing according to the estimated power supply voltage.
に記載の定着方法において、 前記第１の温度検知素子の出力による一定温度制御中
に、前記第２の温度検知素子が温度制御を開始する温
度、前記第２の温度検知素子による温度制御中に前記加
熱体へ入力する前記第２の温度検知素子の検知出力に応
じた供給電力、および記録紙の重送時における温度制御
条件のいずれかを決定することを特徴とする定着方法。20. The fixing method according to claim 15, wherein the second temperature detection element starts the temperature control during the constant temperature control based on the output of the first temperature detection element. Temperature, the power supplied to the heating element according to the detection output of the second temperature detection element during the temperature control by the second temperature detection element, and the temperature control condition when the recording paper is multi-fed. Fixing method.
る加熱体と、該加熱体との間に形成される圧接部に導入
された該記録紙を、前記薄膜フィルムを介して前記加熱
体に加圧することにより、前記記録紙上のトナー画像を
加熱定着する加圧ローラとを有する定着装置を使用し、
非通紙時に前記加熱体の温度を検知する第１の温度検知
素子の出力により一定温度制御を実行し、通紙時に前記
加熱体の温度を検知する第２の温度検知素子の出力によ
り定着温度制御を実行することを特徴とする定着方法。21. A heating element for heating recording paper via a thin film, and the recording paper introduced into a pressure contact portion formed between the heating element and the heating element via the thin film. By using a fixing device having a pressure roller for heating and fixing the toner image on the recording paper by pressing,
The constant temperature control is executed by the output of the first temperature detecting element for detecting the temperature of the heating element when paper is not passed, and the fixing temperature is determined by the output of the second temperature detecting element for detecting the temperature of the heating element when paper is passed. A fixing method comprising performing control.
て、 前記第１の温度検知素子は前記加熱体の加熱領域の端部
に取付けられ、前記第２の温度検知素子は前記加熱体の
加熱領域の中央部に取付けられたことを特徴とする定着
方法。22. The fixing method according to claim 21, wherein the first temperature sensing element is attached to an end of a heating area of the heating element, and the second temperature sensing element is attached to a heating area of the heating element. A fixing method, characterized in that the fixing method is attached to a central portion of the fixing device.
て、 前記加熱体の温度に対する前記第２の温度検知素子の温
度応答速度は、前記第１の温度検知素子の温度応答速度
よりも高いことを特徴とする定着方法。23. The fixing method according to claim 22, wherein a temperature response speed of the second temperature detection element with respect to a temperature of the heating element is higher than a temperature response speed of the first temperature detection element. Characteristic fixing method.
て、 前記第１の温度検知素子による非通紙時の一定温度制御
は一段階の加熱体への通電のオン／オフ制御であり、前
記第２の温度検知素子による通紙時の定着温度制御は多
段階電力制御であることを特徴とする定着方法。24. The fixing method according to claim 23, wherein the constant temperature control by the first temperature detection element during non-sheet passing is a one-stage on / off control of energization to the heating element. 2. The fixing method according to claim 1, wherein the control of the fixing temperature at the time of sheet passing by the second temperature detecting element is multi-step power control.
に記載の定着方法において、 非通紙時における一定温度制御中に、前記第２の温度検
知素子が検出する温度振幅に応じて通紙時の温度制御条
件を決定することを特徴とする定着方法。25. The fixing method according to claim 22, wherein during the constant temperature control when the sheet is not passed, the sheet is fed according to the temperature amplitude detected by the second temperature detecting element. A temperature control condition at the time of fixing.
て、 前記通紙時の温度制御条件の決定は、前記第２の温度検
知素子が検出する温度に基づいて前記加熱体に入力され
る電源電圧を見積もり、前記見積もり後の電源電圧に応
じて通紙時の温度制御条件を決定することを含むことを
特徴とする定着方法。26. The fixing method according to claim 25, wherein the determination of the temperature control condition at the time of sheet passing is performed based on a power supply voltage input to the heating element based on a temperature detected by the second temperature detection element. And estimating the temperature control condition during sheet passing according to the estimated power supply voltage.
に記載の定着方法において、 前記第１の温度検知素子の出力による一定温度制御中
に、前記第２の温度検知素子の振幅周期の時間間隔の大
小に応じて通紙時の温度制御条件を決定することを特徴
とする定着方法。27. The fixing method according to claim 22, wherein during the constant temperature control by the output of the first temperature detecting element, a time period of an amplitude cycle of the second temperature detecting element is set. A fixing method characterized by determining a temperature control condition at the time of paper passing according to the size of the interval.
に記載の定着方法において、 前記第１の温度検知素子の出力による一定温度制御中
に、前記第２の温度検知素子が温度制御を開始する温
度、前記第２の温度検知素子による一定温度制御中に前
記加熱体へ入力する電力の比率、および記録紙の重送時
における温度制御条件のいずれかを決定することを特徴
とする定着方法。28. The fixing method according to claim 22, wherein the second temperature detection element starts the temperature control during the constant temperature control by the output of the first temperature detection element. A fixing temperature, a ratio of electric power input to the heating element during constant temperature control by the second temperature detecting element, and a temperature control condition at the time of double feeding of recording paper. .
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|---|---|---|---|
| JP2000373449A JP2002174985A (en) | 2000-12-07 | 2000-12-07 | Fixing device and fixing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000373449A JP2002174985A (en) | 2000-12-07 | 2000-12-07 | Fixing device and fixing method |
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| Publication Number | Publication Date |
|---|---|
| JP2002174985A true JP2002174985A (en) | 2002-06-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013218841A (en) * | 2012-04-06 | 2013-10-24 | Canon Inc | Heating apparatus and image formation apparatus |
| US8737861B2 (en) | 2010-08-19 | 2014-05-27 | Ricoh Company, Ltd. | Fixing device and image forming apparatus |
| US9037008B2 (en) | 2012-02-02 | 2015-05-19 | Ricoh Company, Ltd. | Fixing device and image forming apparatus including same |
-
2000
- 2000-12-07 JP JP2000373449A patent/JP2002174985A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8737861B2 (en) | 2010-08-19 | 2014-05-27 | Ricoh Company, Ltd. | Fixing device and image forming apparatus |
| US9037008B2 (en) | 2012-02-02 | 2015-05-19 | Ricoh Company, Ltd. | Fixing device and image forming apparatus including same |
| US9454114B2 (en) | 2012-02-02 | 2016-09-27 | Ricoh Company, Ltd. | Fixing device and image forming apparatus including same |
| JP2013218841A (en) * | 2012-04-06 | 2013-10-24 | Canon Inc | Heating apparatus and image formation apparatus |
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