JPH08286552A - Fixing device for image forming device - Google Patents
Fixing device for image forming deviceInfo
- Publication number
- JPH08286552A JPH08286552A JP7088079A JP8807995A JPH08286552A JP H08286552 A JPH08286552 A JP H08286552A JP 7088079 A JP7088079 A JP 7088079A JP 8807995 A JP8807995 A JP 8807995A JP H08286552 A JPH08286552 A JP H08286552A
- Authority
- JP
- Japan
- Prior art keywords
- amount
- power
- temperature
- fixing device
- lamps
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 230000020169 heat generation Effects 0.000 claims abstract 3
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
- Fixing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、画像形成装置の定着装
置に関し、詳しくは、加熱ロール内部に設けたランプへ
の電力供給量を可変制御することにより、均一な温度分
布のもとに、複写紙の定着を常に良好に行う画像形成装
置の定着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for an image forming apparatus, and more specifically, by variably controlling the amount of electric power supplied to a lamp provided inside a heating roll, a uniform temperature distribution is achieved. The present invention relates to a fixing device of an image forming apparatus that always performs good fixing of copy paper.
【０００２】[0002]
【従来の技術】加熱ロールを備えた定着装置において
は、その加熱ロールのロール表面上の温度分布が種々の
理由により不均一の場合、複写紙への画像の定着が良好
に行われない。たとえば、定着処理を行なう複写紙のサ
イズによって加熱ロールの放熱の状態が異なるため、直
前に通過した複写紙のサイズによって加熱ロールのロー
ル表面上の温度分布が不均一となる。2. Description of the Related Art In a fixing device equipped with a heating roll, when the temperature distribution on the roll surface of the heating roll is non-uniform for various reasons, the image is not well fixed on the copy paper. For example, since the heat radiation state of the heating roll differs depending on the size of the copy paper on which the fixing process is performed, the temperature distribution on the roll surface of the heating roll becomes uneven depending on the size of the copy paper that has just passed through.
【０００３】このような問題を解決するものとしては、
例えば、特開平５−２８１８７７号公報には、加熱ロー
ルの熱源として複数本のランプを使用し、ウォームアッ
プ時には全部のランプを点灯させ、小サイズ紙を通紙す
るときには小サイズ用ランプを点灯させ、また、大サイ
ズ紙を通紙するときには各ランプを時間分割にて点灯さ
せることによって、加熱ロールの温度分布の改善を図る
技術が記載されている。To solve such a problem,
For example, in Japanese Unexamined Patent Publication No. 5-281877, a plurality of lamps are used as a heat source of a heating roll, all the lamps are turned on when warming up, and the small size lamps are turned on when small size paper is passed. Also, there is described a technique for improving the temperature distribution of a heating roll by turning on each lamp in a time division manner when passing a large size paper.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記従
来の技術では、ランプに対応した用紙サイズを通紙する
場合には不都合は生じないが、ランプと対応しないサイ
ズの用紙、例えば、ランプ中央部をその端部が通るよう
な用紙を通紙したときには、部分的に温度が低下し過ぎ
たり、上昇し過ぎたりして、加熱ロール表面の均一な温
度分布が得られないことによって画像障害を発生させた
り、また、異常な温度上昇によって、定着装置の部品が
溶解したり、発煙や発火にまで至る虞れがあった。However, in the above-described conventional technique, although no inconvenience occurs when a paper size corresponding to the lamp is passed, a paper size not corresponding to the lamp, for example, a central portion of the lamp is set. When a sheet of paper that passes through the edges is passed, the temperature may drop too much or rise too much, causing an image failure due to the inability to obtain a uniform temperature distribution on the heating roll surface. In addition, due to an abnormal temperature rise, parts of the fixing device may be melted, and smoking or ignition may occur.
【０００５】本発明は、前記の問題点に鑑みなされたも
ので、加熱ロールの内部に配分して設けた複数のランプ
への電力供給量を可変制御することにより、加熱ロール
表面上の温度分布を均一化して複写紙への画像の定着を
良好に行なうことを目的とする。The present invention has been made in view of the above problems, and variably controls the amount of electric power supplied to a plurality of lamps distributed inside the heating roll, thereby providing a temperature distribution on the surface of the heating roll. To make the image uniform on the copy paper and to fix the image well on the copy paper.
【０００６】また、本発明は、画像形成装置全体の電力
量を検知することによって、定着装置へ供給可能な電力
を最大限供給するとともに、装置全体の電力量を管理
し、また、定着に必要な必要最小限の電力量を予め固定
量として確保し、定着に支障を来さない定着装置を提供
することを目的とする。Further, according to the present invention, by detecting the amount of power of the entire image forming apparatus, the maximum amount of power that can be supplied to the fixing device is supplied, the amount of power of the entire device is managed, and the amount of power required for fixing is required. An object of the present invention is to provide a fixing device that secures a necessary minimum amount of electric power as a fixed amount in advance and does not hinder fixing.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記の目的を
達成するために、加熱ロールと、加圧ロールと、前記加
熱ロール内部に発熱分布の異なる少なくとも２本のラン
プを備える画像形成装置の定着装置において、前記各ラ
ンプの軸方向における発熱量が大である部分に対応して
前記加熱ロールの表面に、それぞれ、温度検出センサを
備えるとともに、該２つの温度検出センサによる温度検
出結果に基づいて、前記２本のランプへの電力供給量を
可変制御する電力制御手段を備えたことを特徴とする。In order to achieve the above object, the present invention is an image forming apparatus provided with a heating roll, a pressure roll, and at least two lamps having different heat distributions inside the heating roll. In the fixing device, the temperature detection sensors are provided on the surfaces of the heating rolls corresponding to the portions of the lamps that generate a large amount of heat in the axial direction, and the temperature detection results of the two temperature detection sensors are displayed. On the basis of the above, a power control means for variably controlling the amount of power supplied to the two lamps is provided.
【０００８】また、本発明は、通紙する用紙サイズの情
報を検知し、その情報によって前記各ランプへの電力供
給量を決定し、供給する電力制御手段を備えたことを特
徴とする。Further, the present invention is characterized in that it is provided with a power control means for detecting information on the size of a sheet to be passed, determining the amount of power supplied to each of the lamps based on the information, and supplying the power.
【０００９】また本発明は、前記定着装置を除く前記画
像形成装置全体の電力消費量を検知し、残電力量に基づ
いて前記定着装置へ供給可能な最大電力供給量を決定
し、かつ、それぞれのランプに電力を供給する電力制御
手段を備えている。The present invention also detects the power consumption of the entire image forming apparatus except the fixing device, determines the maximum power supply amount that can be supplied to the fixing device based on the remaining power amount, and Power control means for supplying power to the lamp.
【００１０】また本発明は、前記加熱ロールの表面温度
が所定温度ｔ１以下のときには、前記各ランプへの所定
の電力供給量を固定値とし、該固定値の電力量を供給す
る電力制御手段を備えている。Further, according to the present invention, when the surface temperature of the heating roll is equal to or lower than a predetermined temperature t1, a predetermined power supply amount to each of the lamps is set to a fixed value, and power control means for supplying the fixed amount of power is provided. I have it.
【００１１】また本発明は、前記加熱ロールの表面温度
が所定温度ｔ１以下のときには、前記各ランプへの電力
供給量を固定値とし、前記所定温度ｔ１よりも高い所定
温度ｔ２まで昇温させる前記の所定電力量を供給する電
力制御手段を備えたFurther, according to the present invention, when the surface temperature of the heating roll is equal to or lower than a predetermined temperature t1, the amount of electric power supplied to each lamp is set to a fixed value and the temperature is raised to a predetermined temperature t2 higher than the predetermined temperature t1. Power control means for supplying a predetermined amount of power of
【００１２】[0012]
【作用】本発明によると、加熱ロール内部のランプの軸
方向に設けた複数の温度検出センサによる温度検出結果
に基づいて、電力制御手段が前記ランプへの電力供給量
を可変制御し、また、通紙する用紙サイズの情報を検知
し、その情報によって前記電力制御手段が前記各ランプ
への電力供給量を決定して供給する。According to the present invention, the electric power control means variably controls the amount of electric power supplied to the lamp based on the temperature detection results by the plurality of temperature detection sensors provided in the axial direction of the lamp inside the heating roll. Information on the size of the paper to be passed is detected, and the power control means determines and supplies the amount of power supplied to each lamp based on the information.
【００１３】また、前記定着装置を除く前記画像形成装
置全体の電力消費量を検知し、前記電力制御手段が、残
電力量に基づいて、前記定着装置へ供給可能な最大電力
供給量を決定し、かつ、それぞれのランプに電力を供給
する。Further, the power consumption of the entire image forming apparatus except the fixing device is detected, and the power control means determines the maximum power supply amount that can be supplied to the fixing device based on the remaining power amount. , And supply power to each lamp.
【００１４】また、前記電力制御手段は、前記加熱ロー
ルの表面温度が所定温度ｔ１以下のときには、前記各ラ
ンプへの所定の電力供給量を固定値とし、この固定値の
電力量を供給する。When the surface temperature of the heating roll is equal to or lower than the predetermined temperature t1, the power control means sets a predetermined power supply amount to each of the lamps to a fixed value, and supplies the power amount of the fixed value.
【００１５】また、前記電力制御手段は、前記加熱ロー
ルの表面温度が所定温度ｔ１以下のときには、前記各ラ
ンプへの電力供給量を固定値とし、前記所定温度ｔ１よ
りも高い所定温度ｔ２まで昇温させる前記所定の電力量
を供給する。When the surface temperature of the heating roll is lower than or equal to a predetermined temperature t1, the power control means sets the amount of power supplied to each lamp to a fixed value and raises the temperature to a predetermined temperature t2 higher than the predetermined temperature t1. The predetermined amount of power for heating is supplied.
【００１６】[0016]
【実施例】以下、図面を参照しながら実施例に基づい
て、本発明の特徴を具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below based on embodiments with reference to the drawings.
【００１７】図１は、本発明の画像形成装置の定着装置
の実施例を示す概略構成図である。図において、加熱ロ
ール１に接する位置に図示しない加圧ロールを設け、加
熱ロール１は、前記加圧ロールの軸方向に別個に配設さ
れたランプ２、及び３によって加熱される。なおここで
はランプ２が、複写紙のサイズに拘わらず必ず複写紙が
通過する側、すなわち、複写紙基準位置側に配置されて
いるものとする。加熱された加熱ロール１の温度は、各
ランプ２、３の発光中心部に設けられた温度検知センサ
４、５によって検知され、中央演算装置（以下、ＣＰＵ
と称す）６によってランプ２、３をどの程度加熱するか
の判断を行い、該ＣＰＵ６の動作に基づいて電力制御回
路７が動作し、該電力制御回路７から、ランプ２、３に
所定の電力量が供給され、加熱ロール１の温度が一定に
保たれるようになっている。なお、前記電力制御回路７
は、電源８に接続されている。なお、本実施例において
は、ランプ２、３への供給電力は、たとえば、ランプ
２、３への通電期間を制御することにより、すなわち、
オン・オフの比を変えることにより制御される。但し、
電力制御の方法はこれに限定されるものではない。FIG. 1 is a schematic configuration diagram showing an embodiment of a fixing device of an image forming apparatus of the present invention. In the figure, a pressure roll (not shown) is provided at a position in contact with the heating roll 1, and the heating roll 1 is heated by lamps 2 and 3 which are separately arranged in the axial direction of the pressure roll. Here, it is assumed that the lamp 2 is arranged on the side where the copy paper always passes, that is, on the copy paper reference position side regardless of the size of the copy paper. The temperature of the heated heating roll 1 is detected by the temperature detection sensors 4 and 5 provided at the light emission center portions of the lamps 2 and 3, and the temperature is detected by a central processing unit (hereinafter, CPU).
6) to determine how much the lamps 2 and 3 should be heated, and the power control circuit 7 operates based on the operation of the CPU 6, and the power control circuit 7 supplies a predetermined power to the lamps 2 and 3. A quantity is supplied so that the temperature of the heating roll 1 is kept constant. The power control circuit 7
Is connected to the power supply 8. In the present embodiment, the electric power supplied to the lamps 2 and 3 is controlled by controlling the energization period to the lamps 2 and 3, that is,
It is controlled by changing the on / off ratio. However,
The power control method is not limited to this.
【００１８】図２は、本発明に係る画像形成装置の電力
供給量の一例を示す温度差−ランプ配熱比率表である。
図において、１列目は温度検知センサ４、５によって検
知された加熱ロール表面の「温度差」、２行目はランプ
２の「供給電力量比率」、３行目はランプ３の「供給電
力量比率」である。なお、温度検知センサ４によって検
知された温度をＳA 、温度検知センサ５によって検知さ
れた温度をＳB とする。FIG. 2 is a temperature difference-lamp heat distribution ratio table showing an example of the power supply amount of the image forming apparatus according to the present invention.
In the figure, the first column is the "temperature difference" of the heating roll surface detected by the temperature detection sensors 4 and 5, the second line is the "supply power ratio" of the lamp 2, and the third line is the "supply power of the lamp 3". Volume ratio ”. The temperature detected by the temperature detection sensor 4 is S A , and the temperature detected by the temperature detection sensor 5 is S B.
【００１９】いま、複写機、プリンタ等の画像形成装置
において、通紙幅最大サイズの用紙を複写しようとする
とき、各ランプ２、３からの放熱量は略等しいので、前
記温度検知センサ４、５によって検出された温度ＳA 、
ＳB はほぼ同程度の温度低下量となる。ＳA 、ＳB の差
が｜ＳA −ＳB ｜＜２°Ｃとすると、図２の５行目に示
すように、各ランプ２、３の電力供給量は５０％づつ配
分され、該加熱ロール１の表面温度は均一な温度分布と
なる。Now, in an image forming apparatus such as a copying machine or a printer, when an attempt is made to copy a sheet having a maximum paper-passing width, the amount of heat radiated from each of the lamps 2 and 3 is substantially equal. The temperature S A detected by
S B has a temperature drop amount of substantially the same extent. If the difference between S A and S B is | S A −S B | <2 ° C., the power supply amount of each of the lamps 2 and 3 is distributed by 50% as shown in the fifth line of FIG. The surface temperature of the heating roll 1 has a uniform temperature distribution.
【００２０】また、複写用紙ｐの幅ｂがランプ２よりも
長く、ランプ２の長さとランプ３の長さを合わせた長さ
よりも短い場合、温度検知センサ４が所定温度ｔで安定
するように、ＣＰＵ６の動作により、ランプ２、３を共
通にオン・オフ制御した場合、温度検知センサ５で検知
した温度ＳB は温度検知センサ４で検知した温度ＳAよ
りも高くなる。ＳB −ＳA ＞５°Ｃとなると、図２の７
行目に示すように、ランプ２は７０％の電力供給量とな
り、ランプ３は３０％の電力供給量となる。When the width b of the copy sheet p is longer than the lamp 2 and shorter than the combined length of the lamp 2 and the lamp 3, the temperature detecting sensor 4 is stabilized at the predetermined temperature t. , When the lamps 2 and 3 are commonly turned on / off by the operation of the CPU 6, the temperature S B detected by the temperature detection sensor 5 becomes higher than the temperature S A detected by the temperature detection sensor 4. When S B −S A > 5 ° C., 7 in FIG.
As shown in the row, the lamp 2 has a power supply amount of 70% and the lamp 3 has a power supply amount of 30%.
【００２１】この電力供給の状態が継続すると、ランプ
３は電力供給量が少ないためにＳA−ＳB ＞５°Ｃとな
り、図２の３行目に示すように、ランプ２は３０％の電
力供給量となり、ランプ３は７０％の電力供給量とな
る。以後、前記の電力供給量の変化を繰り返すことによ
って、加熱ロール１の表面の温度分布を均一に維持しな
がら、複写が行われていく。When this state of power supply is continued, the lamp 3 has a small amount of power supply, so that S A -S B > 5 ° C., and as shown in the third line of FIG. The power supply amount is reached, and the lamp 3 has a power supply amount of 70%. After that, by repeating the above-mentioned change in the amount of power supply, copying is performed while maintaining a uniform temperature distribution on the surface of the heating roll 1.
【００２２】なお、上述の説明は制御動作を簡単化した
一例であって、図２に示す例に従えば、温度差ＳB −Ｓ
A に応じて、ランプ２、３に対する電力供給量の比率が
７段階で相補的に制御される。The above description is an example in which the control operation is simplified, and according to the example shown in FIG. 2, the temperature difference S B -S.
Depending on A , the ratio of the power supply amount to the lamps 2 and 3 is complementarily controlled in seven steps.
【００２３】ところで、電力供給量の制御は、前記のよ
うな複数の温度検知センサ４、５で温度差を検出するこ
とによって行う制御方法以外に、マトリックスを使用
し、供給する電力量を制御する制御方法も可能である。Incidentally, the control of the power supply amount uses a matrix to control the power supply amount in addition to the control method performed by detecting the temperature difference by the plurality of temperature detection sensors 4 and 5 as described above. A control method is also possible.
【００２４】例えば、各用紙サイズに対応する電力供給
量を決定しておき、使用される用紙サイズ、例えば、使
用されるトレイの用紙サイズを検知して、この用紙サイ
ズに対応した供給電力量をＣＰＵ６の動作によって電力
制御回路７からランプ２、３へ供給する方法も可能であ
る。なお、用紙サイズを検知する方法として、使用され
るトレイの用紙サイズを検知するセンサを設ける方法が
考えられる。For example, the power supply amount corresponding to each paper size is determined, the paper size used, for example, the paper size of the tray used is detected, and the power supply amount corresponding to this paper size is determined. A method of supplying the power from the power control circuit 7 to the lamps 2 and 3 by the operation of the CPU 6 is also possible. As a method of detecting the paper size, a method of providing a sensor for detecting the paper size of the tray used can be considered.
【００２５】また、定着装置に到達する以前に用紙サイ
ズを検知するセンサを設ける方法等によって、用紙サイ
ズに適した電力量をそれぞれのランプ２、３に供給する
方法も可能である。また、用紙厚さによって変化させる
ことも可能である。Further, a method of supplying a power amount suitable for the sheet size to each of the lamps 2 and 3 is also possible by providing a sensor for detecting the sheet size before reaching the fixing device. It is also possible to change it depending on the paper thickness.
【００２６】また、定着装置に供給する総電力量を固定
値としないで、定着装置を除く画像形成装置全体の電力
消費量をメータで検知し、残電力量を定着装置への供給
電力の１００％として定着装置への総電力供給量を決定
し、各ランプ２、３へ適量の電力を供給することも可能
である。Further, the total amount of power supplied to the fixing device is not set to a fixed value, but the power consumption of the entire image forming apparatus except the fixing device is detected by a meter, and the remaining amount of power is 100% of the power supplied to the fixing device. It is also possible to determine the total amount of power supply to the fixing device as a percentage and supply an appropriate amount of power to each of the lamps 2 and 3.
【００２７】また、加熱ロール１の表面温度が低温度と
なった場合には、適正な温度検知ができないことも発生
しうるので、加熱ロール１の表面温度が所定温度ｔ2 以
下の場合には、各ランプ２、３への電力供給量を可変と
せず固定値とし、固定量の電力を供給することも有効な
手段である。この場合、所定温度ｔ2 よりも低温の所定
温度ｔ1 以下になるように、ランプ２、３へ、それぞ
れ、固定の供給電力量を分配することもできる。Further, when the surface temperature of the heating roll 1 becomes low, it may occur that proper temperature detection cannot be performed. Therefore, when the surface temperature of the heating roll 1 is below the predetermined temperature t2, It is also an effective means to supply a fixed amount of electric power to each of the lamps 2 and 3 without changing the electric power supply to a fixed value. In this case, a fixed amount of power supply can be distributed to each of the lamps 2 and 3 so that the temperature becomes equal to or lower than the predetermined temperature t1 which is lower than the predetermined temperature t2.
【００２８】さらに、前記電力供給量の制御方法とし
て、トランス等を使用した電圧制御による制御法も可能
である。また、位相制御による電力供給量の制御法、及
び、ゼロクス点を起点及び終点として、オン、オフを行
う電力供給装置による制御法も可能である。Further, as a method of controlling the power supply amount, a control method by voltage control using a transformer or the like is also possible. Further, a control method of the power supply amount by phase control and a control method by a power supply device that turns on and off with the Xerox point as a starting point and an ending point are also possible.
【００２９】[0029]
【発明の効果】以上に説明したように、本発明によれ
ば、次のような効果を奏する。As described above, the present invention has the following effects.
【００３０】（１）加熱ロールの表面温度の温度分布を
検知することによって、加熱ロール内部の各ランプに配
分して供給される電力量が可変制御され、あるいは、各
用紙サイズに対応した電力量が各ランプに供給されるの
で、加熱ロールの表面温度が均一分布となり、複写紙へ
の良好な定着が行われる。(1) By detecting the temperature distribution of the surface temperature of the heating roll, the amount of electric power distributed and supplied to each lamp inside the heating roll is variably controlled, or the amount of electric power corresponding to each paper size is controlled. Is supplied to each lamp, the surface temperature of the heating roll is uniformly distributed, and good fixing to the copy paper is performed.
【００３１】（２）定着装置に供給する総電力量を予め
固定値とせず、定着装置を除く画像形成装置全体の電力
消費量を検知し、残電力量を１００％とすることによっ
て、定着装置への総電力供給量を決定し、この総電力量
に基づいて、各ランプへ適切量の電力を供給することに
よって、画像形成装置全体として電力消費量を管理で
き、定着装置へ供給する電力量の増加も可能となる。(2) The total amount of electric power supplied to the fixing device is not set to a fixed value in advance, the electric power consumption of the entire image forming apparatus except the fixing device is detected, and the remaining amount of electric power is set to 100%. The amount of power supplied to the fixing device can be managed by determining the total amount of power supplied to the fixing device and supplying an appropriate amount of power to each lamp based on this total amount of power supplied to the fixing device. Can also be increased.
【００３２】（３）例えば、加熱ロール温度等定着に必
要な所定の電力量を固定値とし電力供給するので、必要
な部分へ必要にして十分な電力量を供給することにな
り、電力の無駄遣い、及び、定着に必要な加熱ロール全
体の温度維持が可能となる。(3) For example, since the predetermined amount of electric power required for fixing such as the temperature of the heating roll is set to a fixed value and the electric power is supplied, a necessary and sufficient amount of electric power is supplied to necessary parts, thus wasting power. Also, it becomes possible to maintain the temperature of the entire heating roll necessary for fixing.
【図１】 本発明の一実施例の要部の構成図である。FIG. 1 is a configuration diagram of a main part of an embodiment of the present invention.
【図２】 同画像形成装置の電力供給量の一実施例を示
す温度差−ランプ配熱比率表である。FIG. 2 is a temperature difference-lamp heat distribution ratio table showing an embodiment of the power supply amount of the image forming apparatus.
１：加熱ロール、２：ランプ、３：ランプ、４：温度検
知センサ、５：温度検知センサ、６：中央演算装置（電
力制御手段）、７：電力制御回路（電力制御手段）、
８：電源、ｂ：複写紙の幅、ｐ：複写紙、ＳA ：温度、
ＳB ：温度、ｔ：所定温度、ｔ1 ：所定温度、ｔ2 ：所
定温度1: heating roll, 2: lamp, 3: lamp, 4: temperature detection sensor, 5: temperature detection sensor, 6: central processing unit (power control means), 7: power control circuit (power control means),
8: power supply, b: width of copy paper, p: copy paper, S A : temperature,
S B : temperature, t: predetermined temperature, t1: predetermined temperature, t2: predetermined temperature
Claims (5)
ロール内部に発熱分布の異なる少なくとも２本のランプ
を備える画像形成装置の定着装置において、 前記各ランプの軸方向における発熱量が大である部分に
対応して前記加熱ロールの表面に、それぞれ、温度検出
センサを備えるとともに、該２つの温度検出センサによ
る温度検出結果に基づいて、前記２本のランプへの電力
供給量を可変制御する電力制御手段を備えたことを特徴
とする画像形成装置の定着装置。1. A fixing device of an image forming apparatus comprising a heating roll, a pressure roll, and at least two lamps having different heat generation distributions inside the heating roll, wherein each lamp has a large heat generation amount in the axial direction. A temperature detection sensor is provided on the surface of the heating roll corresponding to a certain portion, and the amount of electric power supplied to the two lamps is variably controlled based on the temperature detection results of the two temperature detection sensors. A fixing device for an image forming apparatus, comprising a power control unit.
の情報によって前記各ランプへの電力供給量を決定し、
供給する電力制御手段を備えたことを特徴とする画像形
成装置の定着装置。2. The information on the size of the paper to be passed is detected, and the amount of power supply to each of the lamps is determined by the information,
A fixing device for an image forming apparatus, comprising a power supply control unit.
体の電力消費量を検知し、残電力量に基づいて前記定着
装置へ供給可能な最大電力供給量を決定し、かつ、それ
ぞれのランプに電力を供給する電力制御手段を備えた請
求項１もしくは２に記載の画像形成装置の定着装置。3. The power consumption of the entire image forming apparatus except the fixing device is detected, the maximum power supply amount that can be supplied to the fixing device is determined based on the remaining power amount, and each lamp is determined. The fixing device for an image forming apparatus according to claim 1, further comprising a power control unit that supplies power.
１以下のときには、前記各ランプへの所定の電力供給量
を固定値とし、該固定値の電力量を供給する電力制御手
段を備えた請求項１、２もしくは３に記載の画像形成装
置の定着装置。4. The surface temperature of the heating roll is a predetermined temperature t.
The fixing of the image forming apparatus according to claim 1, 2 or 3, further comprising: a power control unit that supplies a fixed amount of power to each of the lamps when the value is 1 or less, and supplies a fixed amount of power. apparatus.
１以下のときには、前記各ランプへの電力供給量を固定
値とし、前記所定温度ｔ１よりも高い所定温度ｔ２まで
昇温させる前記の所定電力量を供給する電力制御手段を
備えた請求項１、２もしくは３に記載の画像形成装置の
定着装置。5. The surface temperature of the heating roll is a predetermined temperature t.
When the value is 1 or less, the electric power supply amount to the respective lamps is set to a fixed value, and the electric power control means for supplying the predetermined electric power amount for raising the temperature to a predetermined temperature t2 higher than the predetermined temperature t1 is provided. The fixing device of the image forming apparatus described in 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7088079A JPH08286552A (en) | 1995-04-13 | 1995-04-13 | Fixing device for image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7088079A JPH08286552A (en) | 1995-04-13 | 1995-04-13 | Fixing device for image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08286552A true JPH08286552A (en) | 1996-11-01 |
Family
ID=13932866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7088079A Pending JPH08286552A (en) | 1995-04-13 | 1995-04-13 | Fixing device for image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08286552A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990021040A (en) * | 1997-08-30 | 1999-03-25 | 윤종용 | Fixing roller temperature controller of electrophotographic developing equipment |
| US6831554B2 (en) | 2001-02-01 | 2004-12-14 | Canon Kabushiki Kaisha | Abnormality detection method and protection apparatus |
| JP2006201780A (en) * | 2005-01-18 | 2006-08-03 | Toshiba Corp | Fixing apparatus and image forming apparatus |
| JP2006251285A (en) * | 2005-03-10 | 2006-09-21 | Oki Data Corp | Image recording device |
| US7925177B2 (en) | 2004-07-21 | 2011-04-12 | Ricoh Co, Ltd. | Image fixing apparatus stably controlling a fixing temperature, and image forming apparatus using the same |
| US8472828B2 (en) | 2009-12-07 | 2013-06-25 | Oki Data Corporation | Developer fixing device and image forming apparatus having a plurality of heating units |
| JP2017111253A (en) * | 2015-12-15 | 2017-06-22 | コニカミノルタ株式会社 | Image forming apparatus and method for controlling image forming apparatus |
| US10156820B2 (en) | 2017-02-02 | 2018-12-18 | Kabushiki Kaisha Toshiba | Temperature control for sheet heating device |
-
1995
- 1995-04-13 JP JP7088079A patent/JPH08286552A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990021040A (en) * | 1997-08-30 | 1999-03-25 | 윤종용 | Fixing roller temperature controller of electrophotographic developing equipment |
| US6831554B2 (en) | 2001-02-01 | 2004-12-14 | Canon Kabushiki Kaisha | Abnormality detection method and protection apparatus |
| US7925177B2 (en) | 2004-07-21 | 2011-04-12 | Ricoh Co, Ltd. | Image fixing apparatus stably controlling a fixing temperature, and image forming apparatus using the same |
| JP2006201780A (en) * | 2005-01-18 | 2006-08-03 | Toshiba Corp | Fixing apparatus and image forming apparatus |
| JP2006251285A (en) * | 2005-03-10 | 2006-09-21 | Oki Data Corp | Image recording device |
| US8472828B2 (en) | 2009-12-07 | 2013-06-25 | Oki Data Corporation | Developer fixing device and image forming apparatus having a plurality of heating units |
| JP2017111253A (en) * | 2015-12-15 | 2017-06-22 | コニカミノルタ株式会社 | Image forming apparatus and method for controlling image forming apparatus |
| US10156820B2 (en) | 2017-02-02 | 2018-12-18 | Kabushiki Kaisha Toshiba | Temperature control for sheet heating device |
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