JP3119780B2 - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JP3119780B2 JP3119780B2 JP06107626A JP10762694A JP3119780B2 JP 3119780 B2 JP3119780 B2 JP 3119780B2 JP 06107626 A JP06107626 A JP 06107626A JP 10762694 A JP10762694 A JP 10762694A JP 3119780 B2 JP3119780 B2 JP 3119780B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- copying
- fixing
- transfer material
- time
- 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 - Fee Related
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Temperature (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写周期と複写休止を
制御することによって、定着温度が定着最適温度下限以
下に低下するのを防止した画像形成装置における定着装
置の温度制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the temperature of a fixing device in an image forming apparatus, in which the fixing temperature is prevented from lowering below a lower limit of the optimum fixing temperature by controlling a copying cycle and a copying pause.
【０００２】[0002]
【従来の技術】従来、複写機、レーザビームプリンタ等
の画像形成装置（以下適宜「複写機等」という。）の定
着装置においては、画像形成部にて転写材表面に静電的
に転写された、樹脂、磁性体、着色料等からなるトナー
を加熱溶解または軟化させて、転写材に定着させる。2. Description of the Related Art Conventionally, in a fixing device of an image forming apparatus such as a copying machine or a laser beam printer (hereinafter referred to as "copying machine or the like" as appropriate), the image is electrostatically transferred to the surface of a transfer material in an image forming section. Further, a toner composed of a resin, a magnetic material, a colorant, and the like is heated and dissolved or softened to be fixed on the transfer material.
【０００３】図４に定着装置の縦断面図を示す。定着装
置は、上方に配置したヒートローラ（加熱体）５１とそ
の下方に配置した加圧ローラ５２とを備えている。ヒー
トローラ５１は、その内側にメインヒータ５３ａとサブ
ヒータ５３ｂとを有し、メインヒータ５３ａが定着時に
は常時使用されるのに対し、サブヒータ５３ｂはウェイ
トアップ短縮のため立上げ時に使用される。ヒートロー
ラ５１と加圧ローラ５２との間の定着ニップ部には、転
写材Ｐが挿通される。転写材Ｐ表面には、画像形成部に
て感光体から転写されたトナー５４が静電的に保持、つ
まり未定着状態で担持されている。転写材Ｐは、定着ニ
ップ部に挿通されると、表面のトナー５４に直接接触す
るヒートローラ５１によって加熱され、同時に転写材Ｐ
を裏面側からヒートローラ５１に押し付ける加圧ローラ
５２によって加圧され、これら加熱と加圧とによってト
ナー５４が溶融固着されて定着される。FIG. 4 is a longitudinal sectional view of a fixing device. The fixing device includes a heat roller (heating body) 51 disposed above and a pressure roller 52 disposed below the heat roller (heating body). The heat roller 51 has a main heater 53a and a sub-heater 53b inside thereof, and the main heater 53a is always used at the time of fixing, whereas the sub-heater 53b is used at the time of startup to shorten the weight. A transfer material P is inserted into a fixing nip portion between the heat roller 51 and the pressure roller 52. The toner 54 transferred from the photoconductor in the image forming unit is electrostatically held on the surface of the transfer material P, that is, carried in an unfixed state. When the transfer material P is inserted into the fixing nip portion, the transfer material P is heated by the heat roller 51 that directly contacts the toner 54 on the surface, and at the same time, the transfer material P
The toner 54 is melted and fixed by the heating and the pressure, and is fixed.
【０００４】トナー５４の定着は、トナー５４を構成す
る樹脂等が軟化または溶解する温度以上で行わなければ
低温オフセットが生じてしまう。一方、温度が高過ぎる
場合には、今度は高温オフセットが発生してしまうとい
う問題がある。つまり、定着には、それに最適な温度の
下限と上限とがあり、これらの範囲内に定着温度が制御
されたときに、良好な定着が行われる。定着温度の制御
は、サーミスタ５５が検知するヒートローラ５１表面の
温度を基準として行われる。If the fixing of the toner 54 is not performed at a temperature higher than a temperature at which the resin or the like constituting the toner 54 is softened or dissolved, a low-temperature offset occurs. On the other hand, if the temperature is too high, there is a problem that a high-temperature offset will occur this time. That is, the fixing has a lower limit and an upper limit of the optimum temperature, and when the fixing temperature is controlled within these ranges, good fixing is performed. The control of the fixing temperature is performed based on the temperature of the surface of the heat roller 51 detected by the thermistor 55.
【０００５】しかし、上述の構成の定着装置では、連続
複写時（連続画像形成時）の複写速度を上げようとする
と、複写枚数が増えるに従って、転写材Ｐとトナー５４
とによって、ヒートローラ５１から供給される熱量以上
の熱量が奪われて、サーミスタ５５の検出温度が低下、
すなわち定着温度が低下してしまう。これを防止するた
めには、メインヒータ５３ａに加える電力を増大させれ
ばよいが、複写機等の全体の消費電力も増大して、一般
家庭用電源が使用できなくなり、設置場所に制限を受け
るなどの不具合が生じる。また、近年、複写機等のプロ
ダクティビティー（生産性）の向上も要求されており、
さらなる高速機の提供が不可欠になっており、複写機等
の全体の消費電力のうち、定着装置の熱源の消費電力が
占める割合が大きくなっている。このため、益々一般電
源内での仕様を満足するのが厳しくなってきている。However, in the fixing device having the above-described configuration, when the copying speed during continuous copying (during continuous image formation) is to be increased, as the number of copies increases, the transfer material P and toner 54 are increased.
As a result, the amount of heat equal to or more than the amount of heat supplied from the heat roller 51 is deprived, and the temperature detected by the thermistor 55 decreases.
That is, the fixing temperature decreases. To prevent this, the power applied to the main heater 53a may be increased, but the overall power consumption of the copier and the like is also increased, so that a general household power supply cannot be used and the installation location is limited. Such a trouble occurs. In recent years, improvement in productivity (productivity) of copying machines and the like has been required.
The provision of a further high-speed machine is indispensable, and the ratio of the power consumption of the heat source of the fixing device to the total power consumption of the copying machine and the like is increasing. For this reason, it has become increasingly strict to satisfy the specifications in a general power supply.
【０００６】そこで、従来、連続複写中にヒートローラ
５１の温度が定着可能下限温度に達してしまったとき、
複写を一時休止して、ヒートローラ５１の温度が適当な
温度に回復するまで、待機していた。また、別な方法と
して、定着可能下限温度よりも少し高い温度になったと
きに、それまでの複写周期を延長して、定着温度の降下
率（転写材Ｐを１枚定着する毎の温度の低下）を緩和
し、定着可能下限温度になるまでの時間を延ばす方法も
提案されている。さらに、この複写周期を延長する方法
にあっては、定着温度の温度降下率と複写残枚数に応じ
て定着処理速度を決定し、複写休止をしないようにする
方法も提案されている。つまり、連続複写時に、定着温
度が低下してきたら、適宜複写周期を延長して、転写材
Ｐの複写後、後続の転写材Ｐを複写するまでの時間間隔
を、転写ローラ５１の温度が十分回復して低下すること
がない程度に設定するものである。Therefore, conventionally, when the temperature of the heat roller 51 has reached the lower limit temperature for fixing during continuous copying,
The copying has been temporarily suspended and has been on standby until the temperature of the heat roller 51 is restored to an appropriate temperature. Further, as another method, when the temperature becomes slightly higher than the lower limit temperature for fixing, the copy cycle up to that time is extended, and the rate of decrease of the fixing temperature (the temperature for fixing one sheet of the transfer material P) is reduced. There is also proposed a method of alleviating the decrease in the temperature and increasing the time until the temperature reaches the lower limit temperature for fixing. Further, as a method of extending the copy cycle, a method has been proposed in which the fixing processing speed is determined according to the temperature drop rate of the fixing temperature and the number of remaining copies, so that copying is not suspended. In other words, if the fixing temperature decreases during continuous copying, the copying cycle is appropriately extended, and the time interval between the copying of the transfer material P and the copying of the subsequent transfer material P is sufficiently recovered by the temperature of the transfer roller 51. It is set to such an extent that it does not decrease.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、前述の
従来技術によると、連続複写時の設定枚数全体の全複写
時間が長くなってしまうという問題があった。すなわ
ち、上述のものは、全複写時間を最短に制御するための
システムではなく、複写動作を一時休止させないように
するばかりに、かえって全複写時間が、複写スピードの
もっと低い他の機種よりもかかり過ぎてしまうケースが
発生してしまう。このため、複写機等のプロダクティビ
ンティーの向上が実現できなくなってしまう。さらに、
複写周期変更後も、定着可能温度の下限近くで定着を行
うために、画像品質についても、最適といえないものが
発生してしまっていた。However, according to the above-mentioned prior art, there is a problem that the total copying time for the entire set number of sheets in continuous copying becomes long. That is, the above-mentioned system is not a system for controlling the total copying time to the shortest, but not only does not suspend the copying operation, but also takes a longer total copying time than other models having a lower copying speed. In some cases, it will pass. For this reason, it is impossible to improve the productivity of a copying machine or the like. further,
Even after the copy cycle is changed, since the fixing is performed near the lower limit of the fixable temperature, the image quality may not be optimal.
【０００８】本発明は、上述事情に鑑みてなされたもの
であり、転写材のサイズにかかわらず、設定された数の
転写材を短時間で出力できる画像形成装置を提供するこ
とを目的とするものである。The present invention has been made in view of the above circumstances, and has as its object to provide an image forming apparatus capable of outputting a set number of transfer materials in a short time regardless of the size of the transfer materials. Things.
【０００９】[0009]
【課題を解決するための手段】上述の目的を達成するた
めの請求項１に係る本発明は、転写材に画像を形成する
像形成手段と、転写材上の画像を加熱する加熱体と、前
記加熱体の温度を検知する温度検知素子と、前記温度検
知素子の検知温度が温調温度を維持するように前記加熱
体を温度制御する制御手段と、を有し、前記像形成手段
により形成された転写材上の画像を前記加熱体の熱で加
熱定着して出力する画像形成装置において、設定された
数の転写材を連続して出力する最中、前記温度検知素子
の検知温度が温調温度よりも低い所定の温度まで降下し
た時、単位時間当たりの出力枚数を減らすか又は転写材
の出力を一時中断するかを、未出力の転写材の数と転写
材のサイズ毎に予め設定されている基準枚数とを比較す
ることにより選択する選択手段を有することを特徴とす
る。According to the first aspect of the present invention, there is provided an image forming means for forming an image on a transfer material, a heating element for heating the image on the transfer material, A temperature detecting element for detecting the temperature of the heating element, and a control unit for controlling the temperature of the heating element so that the detected temperature of the temperature detecting element maintains a regulated temperature, formed by the image forming unit. In the image forming apparatus which heats and fixes the image on the transferred transfer material with the heat of the heating element and outputs the set number of transfer materials continuously, the temperature detected by the temperature detecting element becomes high while continuously outputting the set number of transfer materials. When the temperature drops to a predetermined temperature lower than the regulated temperature, whether to reduce the number of output sheets per unit time or temporarily suspend the output of the transfer material is preset for each of the number of unoutputted transfer materials and the size of the transfer material. Select by comparing with the set reference number It characterized by having a selection means that.
【００１０】[0010]
【作用】以上構成に基づき、加熱体の温度が複写周期変
更温度に低下したときに、周期延長か、一時休止かを選
択する。この選択は、全体の複写時間が短くなるように
選択する。すなわち、延長した周期で複写残枚数を複写
したときの時間と、一時休止した時間に、これまでと同
じ周期で複写残枚数を複写したときの時間を加えた時間
とを比較し、この時間が短くなるようを選択する。According to the above construction, when the temperature of the heating element is reduced to the copy cycle change temperature, whether the cycle is extended or temporarily stopped is selected. This selection is made so as to shorten the entire copying time. That is, the time when the remaining number of copies is copied in the extended cycle is compared with the time obtained by adding the time when the remaining number of copies is copied in the same cycle to the temporary suspension time, and this time is calculated. Choose to be shorter.
【００１１】定着装置においては、連続複写を行うと、
加熱体の熱が順次、トナー像や転写材に奪われるため、
加熱体の定着温度が低下していく。この定着温度の低下
の度合いを示す下降率が高くする要因としては、入力電
源電圧の振れ、本体設置場所の環境（温度、湿度）、原
稿濃度、転写材の物性値（厚さ、含有水分量、表面性、
サイズ剤、添加剤の種類、比率、材料）、転写材の大き
さ、加圧ローラの温度、定着ニップ部の大きさ等が上げ
られる。In the fixing device, when continuous copying is performed,
Since the heat of the heating element is sequentially taken by the toner image and the transfer material,
The fixing temperature of the heating element decreases. Factors that increase the rate of decrease, which indicates the degree of decrease in the fixing temperature, include the fluctuation of the input power supply voltage, the environment (temperature and humidity) of the place where the main body is installed, the document density, and the physical properties of the transfer material (thickness, moisture content). , Surface properties,
The size, the size of the transfer material, the temperature of the pressure roller, the size of the fixing nip, and the like are increased.
【００１２】このような様々な状況により、定着温度の
温度降下率が大きく左右されてしまう。連続複写を実行
する場合、前記の状況により、早期に複写周期変更温度
に達した場合、複写を一時休止して、例えばメインヒー
タとサブヒータを点灯させて、加熱体が定着温調温度に
復帰するまで待機させた方が、複写周期を延長するより
も、定着熱量の効率が良く全複写時間の短縮が図れる場
合がある。[0012] The temperature drop rate of the fixing temperature is greatly affected by such various situations. In the case where continuous copying is executed, if the copy cycle change temperature is reached early due to the above situation, copying is temporarily stopped, for example, the main heater and the sub heater are turned on, and the heating element returns to the fixing temperature control temperature. In some cases, waiting until the copying time is longer than that in the case where the copying cycle is extended can improve the efficiency of fixing heat and shorten the total copying time.
【００１３】[0013]
【実施例】以下、図面に沿って、本発明の実施例につい
て説明する。 〈実施例１〉図５は、本発明に係る定着装置を備えた画
像形成装置としての複写機の概略構成を示す縦断面図で
ある。以下、その構成と動作とを簡単に説明する。Embodiments of the present invention will be described below with reference to the drawings. <Embodiment 1> FIG. 5 is a longitudinal sectional view showing a schematic structure of a copying machine as an image forming apparatus provided with a fixing device according to the present invention. Hereinafter, the configuration and operation will be briefly described.
【００１４】カセット３２（３３）から給紙ローラ２７
（２４）により給紙され、給送ローラ２６（２３）及び
分離ローラ２５（２２）によって分離された転写材Ｐ
は、搬送ローラ２０、１９（２１）によって、レジスト
ローラ２８まで搬送される。転写材Ｐは、レジストロー
ラ２８により所定のタイミングでドラム状の感光体３７
に向けて供給される。From the cassette 32 (33), the paper feed roller 27
(24), and the transfer material P separated by the feed roller 26 (23) and the separation roller 25 (22).
Is transported to the registration roller 28 by the transport rollers 20, 19 (21). The transfer material P is transferred by a registration roller 28 at a predetermined timing to a drum-shaped photosensitive member 37.
Supplied to.
【００１５】感光体３７は、同図中、時計回りに回転駆
動されており、その際、一次帯電器１１によって表面が
均一に帯電される。一方、これらに同期して、原稿台ガ
ラス６に載置された原稿を原稿照射ランプ４により照射
し、その反射光をスリット３、第１ミラー５、第２ミラ
ー２、第３ミラー１、レンズ１３、そして第４ミラー１
４を介してＣＣＤ１５に導き、このＣＣＤ１５によって
画像情報を読み込む。読み込まれた画像情報は電気的に
画像処理した後、これに対応したレーザ光がレーザユニ
ット７から照射され、第１レーザミラー１６、第２レー
ザミラー１２を介して、上述の均一に帯電された感光体
３７を露光し、静電潜像を形成する。The photoreceptor 37 is driven to rotate clockwise in the figure, and at this time, the surface is uniformly charged by the primary charger 11. On the other hand, in synchronization with these, the original placed on the original platen glass 6 is illuminated by the original illuminating lamp 4 and the reflected light is reflected by the slit 3, the first mirror 5, the second mirror 2, the third mirror 1, the lens 13 and 4th mirror 1
The image information is read by the CCD 15 via the CCD 4. The read image information is electrically image-processed, and a laser beam corresponding thereto is emitted from the laser unit 7, and is uniformly charged as described above via the first laser mirror 16 and the second laser mirror 12. The photosensitive member 37 is exposed to form an electrostatic latent image.
【００１６】この静電潜像は、現像器１７によってトナ
ーが付着されて可視像化され、トナー像となる。感光体
３７上のトナー像は、感光体３７にレジストローラ２８
によって供給された転写材Ｐに転写帯電器２９により転
写される。トナー像が転写された転写材Ｐは、除電針３
０によって不要な電荷が除電され、搬送部３１によって
定着器３４に搬送される。定着器３４によって加熱・加
圧されてトナー像が定着された転写材Ｐは、排紙部３６
によって、装置本体外部に排出される。The electrostatic latent image is visualized by attaching toner by the developing device 17 to become a toner image. The toner image on the photoconductor 37 is transferred to the registration roller 28
Is transferred to the transfer material P supplied by the transfer charger 29. The transfer material P on which the toner image has been transferred is removed by the static elimination needle 3
Unnecessary charges are eliminated by 0, and are conveyed to the fixing device 34 by the conveying unit 31. The transfer material P on which the toner image is fixed by heating and pressing by the fixing device 34
Is discharged to the outside of the apparatus main body.
【００１７】一方、トナー像転写後の感光体３７はクリ
ーニングブレードを有するドラムクリーナ９によって表
面の転写残トナーが除去され、さらに、前露光ランプ１
０の照射を受け、次の画像形成（複写）に供される。On the other hand, the transfer residual toner on the surface of the photoreceptor 37 after the transfer of the toner image is removed by a drum cleaner 9 having a cleaning blade.
Upon receiving the irradiation of 0, it is provided for the next image formation (copy).
【００１８】なお、同図中、１８は手差し給紙部、８は
排気ファン、３５は排紙縦パス部である。In FIG. 1, reference numeral 18 denotes a manual paper feed unit, 8 denotes an exhaust fan, and 35 denotes a paper discharge vertical pass unit.
【００１９】図２は、連続複写時の複写時間と複写枚数
との関係を表す図である。FIG. 2 is a diagram showing the relationship between the copying time and the number of copies in continuous copying.
【００２０】の実線、の一点鎖線、の点線は、そ
れぞれ通常の複写時間で複写した場合、複写を一時中断
した場合（第２モード）、複写途中で複写周期（記録材
間時間）を変更（延長）した場合（第１モード）のグラ
フを示す。The solid line, the one-dot chain line, and the dotted line indicate the copying cycle (time between recording materials) during normal copying time, when copying is temporarily interrupted (second mode), and during copying, respectively ( 7 shows a graph in the case of extension) (first mode).
【００２１】同図からわかるように、複写を複写周期を
変更する定着温度（第２温度）Ｔ2で一時休止して、ヒ
ートローラ（加熱体）５１（図４参照）内側の加圧メイ
ンヒータ５３ａとサブヒータ５３ｂとの双方を点灯させ
た場合、定着温度が複写周期変更温度（第２温度）Ｔ2
から、定着温調温度（第１温度）Ｔ1 に達するまで時間
（一時休止時間）ｔ0 を要する。これに対し、複写周期
（記録材間時間）を変更した場合、設定枚数の全複写時
間は、複写残枚数がＭ0 よりも多くなると、グラフの
複写を一時休止した場合より、時間がかかってしまう。[0021] As can be seen from the figure, the pause at the fixing temperature (second temperature) T 2 to change the replication cycle replication, heat roller (heating member) 51 (see FIG. 4) inside the pressure main heater When both the heater 53a and the sub-heater 53b are turned on, the fixing temperature becomes the copy cycle change temperature (second temperature) T 2
, A time (temporary pause time) t 0 is required until the temperature reaches the fixing temperature (first temperature) T 1 . In contrast, if you change the replication cycle (between the recording material time), the total copying time setting number, if the copy remaining number is larger than M 0, than when pause the copying of the graph, takes time I will.
【００２２】以下、連続複写時の複写時間を最短とする
制御方法について、図１に示すフローチャートを参照し
ながら説明する。Hereinafter, a control method for minimizing the copying time during continuous copying will be described with reference to the flowchart shown in FIG.
【００２３】複写機本体がスタンバイ中、定着温度は第
１温度であるＴ1 に温度制御されている（Ｓ１）。原稿
をセットし、連続複写の複写枚数を設定し、コピーボタ
ンを押してコピーをスタートする（Ｓ２）。コピーがタ
ートされて転写材Ｐに対して次々と複写が行われると、
定着温度Ｔが次第に降下していく。定着温度Ｔが複写周
期変更温度（第２温度）Ｔ2 になると（Ｓ３）、その時
点での複写残枚数Ｍが、転写材サイズ毎に決定されてい
るＭ0 枚より多いか、少ないかを判断する（Ｓ４）。複
写残枚数がＭ0 より少なければ、選択手段（不図示）に
よって第１モードを選択し、複写周期を第１時間から第
２時間へと変更（延長）して（Ｓ９）複写を続行する。
一方、複写残枚数ＭがＭ0 より多ければ、選択手段によ
って第２モードを選択し、複写動作を一時休止する（Ｓ
５）。一時休止により、原稿照射ランプ４等に供給する
電力が不要となり、その分の電力を、メインヒータ５３
ａやサブヒータ５３ｂに供給する（Ｓ６）。定着温度Ｔ
が定着温調温度（第１温度）Ｔ1 に達したら（Ｓ７）、
複写動作を再スタートさせる（Ｓ８）。[0023] In the copying machine is in standby, the fixing temperature is the temperature controlled T 1 is a first temperature (S1). An original is set, the number of copies for continuous copying is set, and copying is started by pressing a copy button (S2). When the copy is started and copying is successively performed on the transfer material P,
The fixing temperature T gradually decreases. If the fixing temperature T is replication cycle change temperature (second temperature) T 2 (S3), whether the copy remaining number M at that time, more than 0 Like M being determined on the transfer material by size, or less A judgment is made (S4). If the number of remaining copies is smaller than M 0 , the first mode is selected by the selection means (not shown), and the copy cycle is changed (extended) from the first time to the second time (S9), and copying is continued.
On the other hand, if the number of remaining copies M is larger than M 0 , the second mode is selected by the selection means, and the copying operation is temporarily stopped (S
5). Due to the temporary suspension, power supplied to the document irradiation lamp 4 and the like becomes unnecessary, and the power corresponding to the power is supplied to the main heater 53.
a and the sub heater 53b (S6). Fixing temperature T
There controlled fixing temperature When (first temperature) T 1 is reached (S7),
The copying operation is restarted (S8).
【００２４】このように、複写周期変更（第１モード）
と複写一時休止（第２モード）を複写残枚数Ｍに応じ
て、選択手段によって選択することにより、最短時間で
複写が可能となり、また、複写一時休止を行う場合に
は、より良い定着条件で、定着処理を行うことができ
る。As described above, the copy cycle is changed (first mode).
And the temporary copy (second mode) are selected by the selection means according to the remaining copy number M, so that copying can be performed in the shortest time. And a fixing process can be performed.
【００２５】このような場合、複写一時休止中のメイン
ヒータ５３ａとサブヒータ５３ｂの点灯時に、定着駆動
部を作動させて、加圧ローラ５２を回転させる。これに
より、加圧ローラ５２内部温度を表面温度に近づけ、加
圧ローラ５２内に熱の蓄積をさせると有効である。ただ
し、定着駆動部を作動させ、定着装置を空回転させた場
合、複写周期変更温度Ｔ2 から定着温調温度Ｔ1 に達す
るまでの時間（ｔ0 ＋ｔ1 ）が長くなり、実施例１の加
圧ローラ５２を静止させた場合に比べｔ1 分だけ時間が
余分にかかることになる。In such a case, when the main heater 53a and the sub-heater 53b are turned on during the copying pause, the fixing driving unit is operated to rotate the pressure roller 52. Thereby, it is effective to make the temperature inside the pressure roller 52 close to the surface temperature and to accumulate heat in the pressure roller 52. However, when the fixing driving unit is operated and the fixing device is idly rotated, the time (t 0 + t 1 ) from the copy cycle change temperature T 2 to the fixing temperature adjustment temperature T 1 becomes longer, and the first embodiment will be described. It takes extra time by t 1 compared to the case where the pressure roller 52 is stationary.
【００２６】すなわち、図３に示すように、複写を繰り
返して複写周期変更温度Ｔ2 に達した場合、複写動作を
一時休止して空回転した方が全複写時間が短くなる複写
残枚数の上限枚数Ｍ1 が設定できる。That is, as shown in FIG. 3, when the copying operation is repeated and the copying cycle change temperature T 2 is reached, the total copying time becomes shorter when the copying operation is temporarily stopped and the idle rotation is performed. the number of M 1 can be set.
【００２７】このように一時休止時、定着駆動を作動さ
せることで、加圧ローラ５２の熱の蓄積が可能となり、
再スタート後の再度の定着温度降下率を小さくすること
ができ、複写周期を変更するよりも複写時間の短縮を測
ることができる。 〈実施例３〉実施例３について説明する。実施例につい
て複写を一時休止した場合、定着温調温度Ｔ1 に復帰す
るまでｔ0 時間、待機すると説明したが、連続複写時、
複写周期変更温度Ｔ2 に達した場合の複写残枚数に応じ
て、複写周期を変更した場合より、全複写時間が同等か
もしくは短縮される時間ｔ3 だけ一時休止させて、複写
を実行させても良い。時間ｔ3 の一時休止をした場合の
温度をＴ3 とすると、この場合には、ｔ3 ＜ｔ0 となる
ため、定着温調温度Ｔ1 に完全には復帰しないが（Ｔ2
＜Ｔ3 ＜Ｔ1 ）、それでも複写周期を変更した場合に比
して、より最適な定着温度で定着処理が可能となり、し
かも全複写時間の短縮にもなる。As described above, when the fixing drive is operated during the temporary stop, the heat of the pressure roller 52 can be accumulated.
It is possible to reduce the rate of decrease in the fixing temperature again after the restart, and it is possible to measure a reduction in the copying time rather than changing the copying cycle. Embodiment 3 Embodiment 3 will be described. In the embodiment, when copying is temporarily stopped, it is described that the apparatus waits for a time t 0 until the fixing temperature T 1 is restored.
Depending on the replication remaining number when it reaches the copying cycle change temperature T 2, than when changing the copying cycle, the total copying time by only pause time t 3 when the equal to or shorter, to execute the copying Is also good. Assuming that the temperature at the time of the temporary stop of the time t 3 is T 3 , in this case, t 3 <t 0 , so that the fixing temperature control temperature T 1 is not completely restored (T 2
<T 3 <T 1 ) Even though the copying cycle is changed, the fixing process can be performed at a more optimal fixing temperature, and the total copying time can be reduced.
【００２８】[0028]
【発明の効果】以上説明したように、本発明によると、
転写材の連続複写時に、定着装置が複写周期変更温度に
達したときに、複写残枚数とその処理時間を考慮して、
複写周期を変更して複写を続行するか、複写を一時休止
して定着温調温度に回復するのを待って複写を再開する
かを選択することにより、全複写時間の短縮が可能とな
り、しかも一時休止が選択された場合には、より最適な
定着温度での定着処理が可能となる。As described above, according to the present invention,
During continuous copying of the transfer material, when the fixing device reaches the copy cycle change temperature, taking into account the number of remaining copies and the processing time,
By selecting whether to change the copy cycle and continue copying, or to temporarily suspend copying and wait for the fixing temperature to return to the regulated temperature before resuming copying, the total copying time can be reduced, and When the temporary stop is selected, the fixing process at a more optimal fixing temperature can be performed.
【図１】実施例１の定着装置の温度制御を示すフローチ
ャート。FIG. 1 is a flowchart illustrating temperature control of a fixing device according to a first exemplary embodiment.
【図２】実施例１の複写時間と複写枚数との関係を示す
図。FIG. 2 is a diagram illustrating a relationship between a copy time and the number of copies according to the first embodiment.
【図３】実施例２の複写時間と複写枚数との関係を示す
図。FIG. 3 is a diagram illustrating a relationship between a copy time and the number of copies according to a second embodiment.
【図４】実施例１ないし実施例３の定着装置の構成を示
す縦断面図。FIG. 4 is a longitudinal sectional view illustrating a configuration of a fixing device according to the first to third embodiments.
【図５】実施例１ないし実施例３の定着装置を備えた複
写機の構成を示す縦断面図。FIG. 5 is a longitudinal sectional view illustrating a configuration of a copying machine including the fixing device according to the first to third embodiments.
３４ 定着装置（定着器） ５１ 加熱体（ヒートローラ） ５２ 加圧ローラ ５３ａ メインヒータ ５３ｂ サブヒータ ５４ トナー ５５ サーミスタ Ｐ 転写材 Ｍ 複写枚数 Ｍ0 、Ｍ1 複写残枚数 Ｔ 定着温度 Ｔ1 定着温調温度 Ｔ2 複写周期変更温度 ｔ0 一時休止時間34 a fixing device (fixing unit) 51 heating body (heat roller) 52 the pressure roller 53a main heater 53b sub heater 54 Toner 55 thermistor P transfer material M number of copies M 0, M 1 copy remaining number T fixing temperature T 1 of the fixing temperature adjustment temperature T 2 copy cycle change temperature t 0 pause time
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 13/20 G03G 15/20 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G03G 13/20 G03G 15/20
Claims (1)
転写材上の画像を加熱する加熱体と、前記加熱体の温度
を検知する温度検知素子と、前記温度検知素子の検知温
度が温調温度を維持するように前記加熱体を温度制御す
る制御手段と、を有し、前記像形成手段により形成され
た転写材上の画像を前記加熱体の熱で加熱定着して出力
する画像形成装置において、 設定された数の転写材を連続して出力する最中、前記温
度検知素子の検知温度が温調温度よりも低い所定の温度
まで降下した時、単位時間当たりの出力枚数を減らすか
又は転写材の出力を一時中断するかを、未出力の転写材
の数と転写材のサイズ毎に予め設定されている基準枚数
とを比較することにより選択する選択手段を有すること
を特徴とする画像形成装置。An image forming means for forming an image on a transfer material;
A heating element that heats an image on a transfer material, a temperature detection element that detects the temperature of the heating element, and control means that controls the temperature of the heating element so that the temperature detected by the temperature detection element maintains a regulated temperature. And an image forming apparatus that heats and fixes an image on the transfer material formed by the image forming unit with the heat of the heating element and outputs the set number of transfer materials continuously. In the meantime, when the detected temperature of the temperature detecting element drops to a predetermined temperature lower than the regulated temperature, whether to reduce the number of output sheets per unit time or to temporarily suspend the output of the transfer material, a non-output transfer is performed. An image forming apparatus comprising: a selection unit that selects by comparing the number of materials with a reference number preset for each size of transfer material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06107626A JP3119780B2 (en) | 1994-04-21 | 1994-04-21 | Image forming device |
| US08/424,963 US5621511A (en) | 1994-04-21 | 1995-04-19 | Fixing apparatus with sheet interval adjustment and fixing interruptions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06107626A JP3119780B2 (en) | 1994-04-21 | 1994-04-21 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07295434A JPH07295434A (en) | 1995-11-10 |
| JP3119780B2 true JP3119780B2 (en) | 2000-12-25 |
Family
ID=14463963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06107626A Expired - Fee Related JP3119780B2 (en) | 1994-04-21 | 1994-04-21 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3119780B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102636619B1 (en) * | 2019-04-23 | 2024-02-15 | 롯데정밀화학 주식회사 | Pouch container for urea solution |
-
1994
- 1994-04-21 JP JP06107626A patent/JP3119780B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102636619B1 (en) * | 2019-04-23 | 2024-02-15 | 롯데정밀화학 주식회사 | Pouch container for urea solution |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07295434A (en) | 1995-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3403057B2 (en) | Image forming device | |
| JPH1010913A (en) | Fixing device recovery time shortening method and fixing device | |
| JP3629354B2 (en) | Image forming apparatus | |
| JP2000267507A (en) | Image forming device | |
| US5621511A (en) | Fixing apparatus with sheet interval adjustment and fixing interruptions | |
| US6885832B2 (en) | Image forming apparatus having speed-changeable image bearing body | |
| JP3119780B2 (en) | Image forming device | |
| JP3125569B2 (en) | Image heating device | |
| JP4093180B2 (en) | Image forming apparatus | |
| JPS6364058A (en) | Image forming device | |
| US5095329A (en) | Copying machine | |
| JP2001066944A (en) | Image heating device | |
| JPH10142999A (en) | Fixing device, image forming device and method for image forming | |
| JPH056188B2 (en) | ||
| JPH09127848A (en) | Image forming method and device therefor | |
| JP2003167450A (en) | Image forming apparatus | |
| JP2003233274A (en) | Fixing device and image forming apparatus equipped therewith | |
| JP3469184B2 (en) | Fixing unit temperature control device and image forming apparatus | |
| JPH10340019A (en) | Image forming device | |
| JPH10186936A (en) | Image forming device and its method | |
| JPS6296972A (en) | Copying device | |
| JPH09244316A (en) | Image forming device | |
| JPH07104607A (en) | Copying machine | |
| JPH04306688A (en) | Image formation device | |
| JP2004246212A (en) | Image forming apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071013 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081013 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091013 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091013 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101013 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101013 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111013 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111013 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121013 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131013 Year of fee payment: 13 |
|
| LAPS | Cancellation because of no payment of annual fees |