JPH07175354A - Heating device - Google Patents
Heating deviceInfo
- Publication number
- JPH07175354A JPH07175354A JP31829493A JP31829493A JPH07175354A JP H07175354 A JPH07175354 A JP H07175354A JP 31829493 A JP31829493 A JP 31829493A JP 31829493 A JP31829493 A JP 31829493A JP H07175354 A JPH07175354 A JP H07175354A
- Authority
- JP
- Japan
- Prior art keywords
- heating
- drum
- heat
- heating drum
- heating element
- 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.)
- Granted
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Surface Heating Bodies (AREA)
- Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば複写機、プリン
タ、ファックス等における導入記録材を加熱する加熱装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for heating a recording material introduced in a copying machine, a printer, a fax machine or the like.
【０００２】即ちこの加熱装置は、複写機、プリンタ、
ファックスなどの画像形成装置における画像加熱定着装
置、例えば、電子写真、静電記録、マグネスタイラス、
磁気記録などの適宜の画像形成プロセス手段により加熱
溶融性の樹脂などより成るトナーを用いて記録材（転写
材シート、エレクトロファックスシート、静電記録シー
ト、印刷紙など）の面に間接（転写）方式もしくは直接
方式で形成した、目的の画像に対応した未定着のトナー
画像を担持している記録材面に永久固着画像として加熱
定着する画像加熱定着装置として活用できる。That is, this heating device is used for copying machines, printers,
An image heating and fixing device in an image forming apparatus such as a fax machine, for example, an electrophotographic device, an electrostatic recording device, a magnestius,
Indirectly (transfer) to the surface of a recording material (transfer material sheet, electrofax sheet, electrostatic recording sheet, printing paper, etc.) using toner made of heat-meltable resin by an appropriate image forming process means such as magnetic recording. It can be utilized as an image heating fixing device that heat-fixes as a permanent fixed image on the surface of a recording material carrying an unfixed toner image corresponding to a target image, which is formed by a method or a direct method.
【０００３】また、例えば、画像を担持した記録材を加
熱して表面性を改質（艶出しなど）する装置、仮定着処
置する装置に使用できる。Further, it can be used, for example, in an apparatus for heating a recording material carrying an image to modify the surface properties (such as polishing) and an apparatus for post-treatment.
【０００４】また、例えば、加熱装置の表面にトナー像
を形成し、記録材面に永久固着画像として加熱転写定着
する画像形成装置として活用できる。Further, for example, it can be utilized as an image forming apparatus which forms a toner image on the surface of a heating device and heat-transfers and fixes it as a permanently fixed image on the surface of a recording material.
【０００５】[0005]
【従来の技術】従来、前述のような加熱装置、例えば前
述の画像加熱定着装置は、内部にハロゲンヒータ等の発
熱体を備えた中空円筒状の定着ローラと、該定着ローラ
に加圧接触する加圧ローラを対向して構成されている。
このような画像加熱定着装置は、定着ローラ内の発熱体
に電圧を印加することで発熱させ、該発熱体から中空円
筒内の空気中を放射し、定着ローラ内周部に熱を伝え、
さらに、定着ローラ内周部から定着ローラ外周部表面に
伝導した熱を、前記定着ローラと前記加圧ローラとに挟
まれた転写材に伝え、該転写材上に形成された未定着ト
ナー像を軟化または溶融し冷却固化することで転写材上
に定着する。2. Description of the Related Art Conventionally, the above-mentioned heating device, for example, the above-mentioned image heating and fixing device, is a hollow cylindrical fixing roller having a heating element such as a halogen heater therein and is brought into pressure contact with the fixing roller. The pressure rollers are opposed to each other.
Such an image heating and fixing device generates heat by applying a voltage to a heating element in the fixing roller, radiates the air in the hollow cylinder from the heating element, and transfers the heat to the inner peripheral portion of the fixing roller.
Further, the heat conducted from the inner peripheral portion of the fixing roller to the outer peripheral surface of the fixing roller is transferred to the transfer material sandwiched between the fixing roller and the pressure roller, and the unfixed toner image formed on the transfer material is transferred. It is fixed on the transfer material by being softened or melted and then cooled and solidified.
【０００６】このような加熱装置の場合、定着ローラ外
周面の温度をトナー像を定着するに適した所望の温度に
設定するという動作を極力早く行なうことが従来から望
まれている。In the case of such a heating device, it has been conventionally desired to perform the operation of setting the temperature of the outer peripheral surface of the fixing roller to a desired temperature suitable for fixing the toner image as quickly as possible.
【０００７】このことを実現するために熱伝導性を向上
させることが必要であり、具体的には、 １．発熱体と定着ローラ内周部とを極力近接させる。In order to realize this, it is necessary to improve the thermal conductivity, and specifically, 1. The heating element and the inner peripheral portion of the fixing roller are placed as close to each other as possible.
【０００８】２．定着ローラの肉厚を極力薄くさせる。2. Make the fixing roller as thin as possible.
【０００９】３．定着ローラの基材にアルミニウムなど
の熱伝導性のよい材料を用いる。3. A material having good thermal conductivity such as aluminum is used for the base material of the fixing roller.
【００１０】という方法などを用いた従来例１が知られ
ている。Conventional example 1 using the method described above is known.
【００１１】また、熱伝導性を向上させるという目的に
より、前記１．、２．を達成した加熱装置としては、図
４に示すような定着装置（従来例２）がある。For the purpose of improving the thermal conductivity, the above 1. 2. As a heating device that achieves the above, there is a fixing device (conventional example 2) as shown in FIG.
【００１２】この定着装置は、記録材上に形成されたト
ナー像を加熱定着する装置であり、耐熱シート２６１０
を駆動ローラ２６２０と、テンションローラ２６３０
と、固定部材である線状発熱体２６６０に掛け渡し、搬
送する装置である。テンションローラ２６３０は不図示
の加圧ばねの加圧力により、耐熱シート２６１０に張力
を与えている。加圧ローラ２６７０は不図示の加圧ばね
の加圧力により、耐熱シート２６１０の線状発熱体２６
６０を背面にする部分で押圧接触している。この定着装
置についてのより詳しい説明は、特開平２−２９３７７
６などに記載されている。This fixing device is a device for heating and fixing the toner image formed on the recording material, and is a heat-resistant sheet 2610.
Drive roller 2620 and tension roller 2630
And a linear heating element 2660, which is a fixing member, for transporting. The tension roller 2630 applies tension to the heat resistant sheet 2610 by the pressure of a pressure spring (not shown). The pressure roller 2670 is pressed against the linear heating element 26 of the heat resistant sheet 2610 by the pressure of a pressure spring (not shown).
The part where 60 is on the back is in pressure contact. For a more detailed description of this fixing device, see JP-A-2-29377.
6, etc.
【００１３】このような定着装置の場合、耐熱シート２
６１０の外周面の温度をトナー像を定着するに適した所
望の温度に設定するという動作を数秒で行なうことがで
きる。In the case of such a fixing device, the heat-resistant sheet 2
The operation of setting the temperature of the outer peripheral surface of 610 to a desired temperature suitable for fixing the toner image can be performed in a few seconds.
【００１４】[0014]
【発明が解決しようとしている課題】しかしながら前記
従来例１では、定着ローラ外周面の温度をトナー像を定
着するに適した所望の温度に設定するという動作を極力
早く行なうためには、前述のように、 （１）発熱体と定着ローラ内周部とを極力近接させる。However, in the prior art example 1, in order to perform the operation of setting the temperature of the outer peripheral surface of the fixing roller to a desired temperature suitable for fixing the toner image as quickly as possible, as described above. (1) The heating element and the inner peripheral portion of the fixing roller are brought as close as possible to each other.
【００１５】（２）定着ローラの肉厚を極力薄くさせ
る。(2) The thickness of the fixing roller is made as thin as possible.
【００１６】（３）定着ローラの基材にアルミニウムな
どの良熱伝導性の材料を用いる。(3) A material having good heat conductivity such as aluminum is used for the base material of the fixing roller.
【００１７】ことが必要だが、上記の（１）項を達成す
る場合、定着ローラの内側に固定されているハロゲンヒ
ータなどの発熱体と定着ローラの内周部とを接触させる
と、定着ローラが滑らかに回転しないとか、ハロゲンヒ
ータなどの発熱体が損傷するという恐れがあるため、あ
る程度の間隙を設けておかなければならない。そのた
め、発熱体の熱を空気中に放射し、その熱を定着ローラ
に伝えなければならない。よって、熱効率が落ちてしま
う。However, in order to achieve the above item (1), when the heating element such as a halogen heater fixed inside the fixing roller and the inner peripheral portion of the fixing roller are brought into contact with each other, the fixing roller is fixed. Since it may not rotate smoothly or the heating element such as a halogen heater may be damaged, a certain amount of clearance must be provided. Therefore, it is necessary to radiate the heat of the heating element into the air and transfer the heat to the fixing roller. Therefore, the thermal efficiency is reduced.
【００１８】また（２）項を達成するためには、定着ロ
ーラの肉厚を極力薄くさせることが必要だが、あまり薄
くすると、加圧ローラから受ける加圧力により、定着ロ
ーラが変形してしまうため、これも限界がある。また、
加圧力を小さくすれば、定着不良となってしまうため、
加圧力もあまり下げることはできない。Further, in order to achieve the item (2), it is necessary to make the thickness of the fixing roller as thin as possible, but if it is made too thin, the fixing roller is deformed by the pressure applied from the pressure roller. , This also has a limit. Also,
If the applied pressure is reduced, fixing will be poor, so
The pressing force cannot be lowered so much.
【００１９】さらに（３）項と（２）項を同時に行なう
と、やはり、剛性の問題があり、定着ローラを極力薄く
するためには、例えば、熱伝導性の良いアルミニウムで
はなく、剛性の高い鉄などを用いることになることか
ら、（３）項と（２）項を同時に達成することはできな
い。Further, if the items (3) and (2) are performed at the same time, there is still a problem of rigidity, and in order to make the fixing roller as thin as possible, for example, it is not aluminum having good heat conductivity but high rigidity. Since iron or the like will be used, it is impossible to achieve the items (3) and (2) at the same time.
【００２０】また、定着ローラの内部にハロゲンヒータ
などの発熱体があるため、定着ローラの半径を小さくす
ることができないため、消費電力が大きくなる。また、
定着部通過後の記録材を定着ローラから分離するため
に、分離爪を用いているが、これも定着ローラの半径を
小さくすれば、曲率分離できるため、廃止できるが、前
述の理由により実現できていない。Further, since the fixing roller has a heating element such as a halogen heater inside, the radius of the fixing roller cannot be reduced, resulting in a large power consumption. Also,
Separation claws are used to separate the recording material from the fixing roller after passing through the fixing section, but this can also be eliminated because the curvature can be separated by reducing the radius of the fixing roller, but this is not possible due to the above reasons. Not not.
【００２１】前記従来例２の場合、耐熱シート２６１０
の外周面の温度をトナー像を定着するに適した所望の温
度に設定するという動作を数秒で行なうことができるた
め、クイックスタートという点では効果はあるが、以下
に示すような欠点がある。In the case of Conventional Example 2, the heat-resistant sheet 2610
Since the operation of setting the temperature of the outer peripheral surface of the device to a desired temperature suitable for fixing the toner image can be performed in a few seconds, it is effective in terms of quick start, but has the following drawbacks.
【００２２】即ち、このような構成の定着装置の場合、
線状発熱体２６６０は定着部（耐熱シート２６１０の線
状発熱体２６６０と接触している部分）近傍のみを加熱
し、定着部における耐熱シート２６１０の外周部を定着
するに適切な温度に設定している。そのため、耐熱シー
ト２６１０は定着部以外に関しては、外周温度が極端に
低く、例えば、耐熱シート２６１０が５０μｍのポリイ
ミド、線状発熱体２６６０の発熱温度が１６０℃、耐熱
シート２６１０の移動速度が２４ｍｍ／ｓｅｃとする
と、５０℃程度である。That is, in the case of the fixing device having such a structure,
The linear heating element 2660 heats only the vicinity of the fixing portion (the portion of the heat resistant sheet 2610 that is in contact with the linear heating element 2660), and is set to an appropriate temperature for fixing the outer peripheral portion of the heat resistant sheet 2610 in the fixing portion. ing. Therefore, the heat-resistant sheet 2610 has an extremely low outer peripheral temperature except for the fixing portion. For example, the heat-resistant sheet 2610 has a polyimide of 50 μm, the heating temperature of the linear heating element 2660 is 160 ° C., and the moving speed of the heat-resistant sheet 2610 is 24 mm / If it is sec, it is about 50 ° C.
【００２３】そのため、サーミスタなどの温度検知手段
により、温度を検知しながら、線状発熱体２６６０を駆
動し、定着部における耐熱シート２６６０外周部の温度
を急激に設定温度に上昇しなければならず、従来例１と
比較して駆動方法が複雑になる。また、特に、画像形成
装置の電源を入れた直後は、線状発熱体２６６０が駆動
された後に、耐熱シート２６１０は、暖められるため、
少なくとも耐熱シート２６６０が１回転するまでは、定
着部以外の部分は５０℃にまで到達しておらず、線状発
熱体の発熱温度（発熱量）をより高くしなければならな
い。そのため、制御が複雑になる。Therefore, it is necessary to drive the linear heating element 2660 while detecting the temperature by means of a temperature detecting means such as a thermistor to rapidly raise the temperature of the outer peripheral portion of the heat resistant sheet 2660 in the fixing portion to the set temperature. The driving method is more complicated than that of the first conventional example. Further, in particular, immediately after turning on the power of the image forming apparatus, the heat-resistant sheet 2610 is warmed after the linear heating element 2660 is driven,
Until at least one rotation of the heat-resistant sheet 2660, the temperature of the linear heating element has to reach a higher temperature (heat generation amount) because the temperature of the parts other than the fixing part has not reached 50 ° C. Therefore, control becomes complicated.
【００２４】また、導入記録材が耐熱シート２６１０と
接触している部分と、非接触の部分とで、耐熱シート２
６１０、線状発熱体２６６０の温度が異なり、例えば、
通紙幅の狭い導入記録材を数枚搬送した後で、通紙幅の
広い導入記録材を搬送させると、長手方向において、定
着部に温度むらが生じているため、定着状態が異なる
（例えば、部分的に定着不良になっているなど）という
現象を引き起こす。このことを改善するためには、また
複雑な制御が必要となり、あらゆる通紙条件において、
問題を完全に解決することは非常に困難である。耐熱シ
ート２６１０に熱伝導性のよいアルミニウムなどのシー
トを用いて構成すれば前記のような温度むらを解決でき
るが、熱伝導性がよいと、線状発熱体２６６０から伝わ
る熱が、定着部以外にも瞬間的に逃げていき、定着部の
温度が定着に最適な温度にならない。The heat-resistant sheet 2 is composed of a portion where the introduced recording material is in contact with the heat-resistant sheet 2610 and a non-contact portion.
610 and the temperature of the linear heating element 2660 are different, for example,
When several sheets of the recording material having a narrow sheet width are conveyed and then a sheet of recording material having a large sheet width is conveyed, temperature unevenness occurs in the fixing section in the longitudinal direction. It causes a phenomenon such as "fixing failure". In order to improve this, complicated control is required, and under all paper feeding conditions,
It is very difficult to solve the problem completely. If the heat-resistant sheet 2610 is made of a sheet of aluminum or the like having good thermal conductivity, the above-mentioned temperature unevenness can be solved. However, if the thermal conductivity is good, the heat transmitted from the linear heating element 2660 is not applied to the fixing portion. Even so, the temperature of the fixing section does not reach the optimum temperature for fixing.
【００２５】また従来例１の場合、ハロゲンヒータなど
の発熱体からの熱を定着ローラ全周にわたり、ほぼ均一
な温度に加熱できるため、従来例２のように、定着部近
傍を急激な温度上昇により、加熱する必要がないため、
温調動作はさほど複雑ではないという点において、有利
である。In the case of the conventional example 1, the heat from the heating element such as the halogen heater can be heated to a substantially uniform temperature over the entire circumference of the fixing roller. Because there is no need to heat,
The temperature control operation is advantageous in that it is not so complicated.
【００２６】すなわち、従来例１と従来例２の前記の欠
点を同時に解決するには、 １．発熱体と定着ローラ内周部とを極力近接させる。That is, in order to solve the above-mentioned drawbacks of the conventional example 1 and the conventional example 2 at the same time, 1. The heating element and the inner peripheral portion of the fixing roller are placed as close to each other as possible.
【００２７】２．定着ローラの肉厚を極力薄くさせる。2. Make the fixing roller as thin as possible.
【００２８】３．定着ローラの基材にアルミニウムなど
の熱伝導性のよい材料を用いる。3. A material having good thermal conductivity such as aluminum is used for the base material of the fixing roller.
【００２９】４．発熱体と定着ローラの内周部との距離
が全周にわたり、均一であり、定着ローラが全周にわた
り、ほぼ均一に加熱される。4. The distance between the heating element and the inner peripheral portion of the fixing roller is uniform over the entire circumference, and the fixing roller is heated substantially uniformly over the entire circumference.
【００３０】従ってこの４つの条件が同時に満たされる
加熱装置の開発が必要である。Therefore, it is necessary to develop a heating device that satisfies these four conditions at the same time.
【００３１】[0031]
【課題を解決するための手段】本発明は、上記要求に答
えるためになされたもので導入記録材を加熱する加熱装
置において、発熱体により加熱される筒状部材である加
熱ドラムと、該加熱ドラムの内周面に接触する保持ロー
ラと、該加熱ドラムの外周面に接触する加圧ローラによ
り構成され、前記加熱ドラムを前記保持ローラと前記加
圧ローラとで挟持し搬送することにある。SUMMARY OF THE INVENTION The present invention has been made in order to meet the above-mentioned requirements, and in a heating device for heating an introduced recording material, a heating drum which is a cylindrical member heated by a heating element, and the heating device. The holding roller is in contact with the inner peripheral surface of the drum, and the pressure roller is in contact with the outer peripheral surface of the heating drum. The heating drum is sandwiched between the holding roller and the pressure roller and conveyed.
【００３２】また、本発明は、前記発熱体は面状発熱体
であり、前記加熱ドラムは、熱伝導性の良い基材と前記
発熱体とが一体に構成されている。Further, in the present invention, the heating element is a planar heating element, and the heating drum is formed by integrally forming a base material having good thermal conductivity and the heating element.
【００３３】また、本発明は、前記保持ローラは断熱部
材を含んで構成されることにある。Further, according to the present invention, the holding roller includes a heat insulating member.
【００３４】[0034]
【作用】従って上記構成により加熱ドラムの肉厚を薄く
しても加熱ドラムが変形しない。加熱ドラムを設定温度
に到達するための所要時間が短い。加熱ドラム全面にお
いて温度をほぼ均一にできる。加熱ドラムの径を小さく
できるという作用効果が得られる。Therefore, with the above construction, the heating drum is not deformed even if the thickness of the heating drum is reduced. The time required for the heating drum to reach the set temperature is short. The temperature can be made almost uniform on the entire surface of the heating drum. The effect that the diameter of the heating drum can be reduced can be obtained.
【００３５】以下に本発明を図面に示す実施例に基いて
詳細に説明する。The present invention will be described in detail below with reference to the embodiments shown in the drawings.
【００３６】[0036]
〔実施例１〕図１は、本実施例１の断面構成を示す図で
ある。加熱ドラム１０は、厚さ数１００μｍ程度のアル
ミなどの良熱伝導性ドラム１３の内側に厚さ数１０〜数
１００μｍ程度のポリイミドなどの耐熱性樹脂などによ
り耐熱性絶縁層１２を形成し、その内側に、厚さ数１０
〜数１００μｍ程度の自己温度制御機構を有する樹脂な
どによる発熱層１１を形成してある。また、良熱伝導性
ドラム１３の外側には、厚さ数１０〜数１００μｍ程度
のＰＴＦＥ、ＰＦＡなどのフッ素樹脂などによる離型層
１４がコーティングされている。[Embodiment 1] FIG. 1 is a diagram showing a cross-sectional structure of the first embodiment. The heating drum 10 has a heat-resistant insulating layer 12 formed of a heat-resistant resin such as polyimide having a thickness of several tens to several hundreds of μm inside a good heat conductive drum 13 having a thickness of several hundreds of μm. Inside, thickness number 10
A heat generating layer 11 made of resin or the like having a self-temperature control mechanism of about several hundreds of μm is formed. A release layer 14 made of a fluororesin such as PTFE or PFA having a thickness of several tens to several hundreds of μm is coated on the outside of the good thermal conductive drum 13.
【００３７】この加熱ドラム１０は、不図示のばねなど
の加圧部材により、シリコンゴムなどの弾性体を芯金に
一体成型などして構成される加圧ローラ２０と、芯金に
ＰＰＳ等の断熱性部材を一体成型などして構成される断
熱性保持ローラ３０とで押圧挟持されている。加圧ロー
ラ２０と断熱性保持ローラ３０は、少なくともどちらか
一方が、不図示のギア列などの駆動伝達手段により、不
図示のモータなどの動力源からの動力が伝達され、加熱
ドラム１０を回転させている。加熱ドラム１０の発熱層
１１の長手方向の両端部には、リング状に電極が設けら
れており、不図示の導電性の板ばねを介して電極間に電
圧を印加することにより、発熱層１１を発熱させる。発
熱層１１からの熱は、耐熱性絶縁層１２、良熱伝導性ド
ラム１３を介して離型層１４を加熱する。良熱伝導性ド
ラム１３の厚さは、薄ければ薄いほど、短時間で加熱さ
れるが、薄すぎれば、機械的強度が低下するため、断熱
保持ローラ３０と加圧ローラ２０により押圧挟持してい
る。また良熱電性ドラム１３の厚さを薄くしすぎると、
発熱層１１から発した熱は、断熱保持ローラ３０に伝わ
る量も増えるため、余り薄くすることは、逆効果であ
り、結局、加熱ドラム１０の厚さは、発熱層１１の発熱
温度にもよるが、総じて、数１００μｍ程度とするのが
適当である。The heating drum 10 includes a pressure roller 20 formed by integrally molding an elastic body such as silicon rubber on a core metal by a pressure member such as a spring (not shown), and a core metal such as PPS. It is pressed and nipped by a heat insulating holding roller 30 formed by integrally molding a heat insulating member. At least one of the pressure roller 20 and the heat insulating holding roller 30 is rotated by the drive power transmission means such as a gear train (not shown) from a power source such as a motor (not shown) to rotate the heating drum 10. I am letting you. Ring-shaped electrodes are provided at both ends of the heating layer 11 of the heating drum 10 in the longitudinal direction, and a voltage is applied between the electrodes via a conductive leaf spring (not shown) to generate the heating layer 11. Heat up. The heat from the heat generating layer 11 heats the release layer 14 via the heat resistant insulating layer 12 and the good thermal conductive drum 13. As the thickness of the good thermal conductive drum 13 becomes thinner, it is heated in a shorter time. However, if it is too thin, the mechanical strength is lowered. ing. If the good thermoelectric drum 13 is made too thin,
Since the amount of heat generated from the heat generating layer 11 is also transferred to the heat insulating holding roller 30, reducing the thickness too thin has the opposite effect, and in the end, the thickness of the heating drum 10 depends on the heat generating temperature of the heat generating layer 11. However, it is suitable that the thickness is about several hundreds of μm in total.
【００３８】また、発熱層１１は、自己温度制御機能を
有しているので、発熱温度を所望の温度に設定すれば、
電極間に電圧を印加するだけで、設定温度を越えると急
激に電気抵抗が増加し、設定温度を保つので温度検知手
段や、温度制御手段を必要とせず、低コスト化、装置の
小型化に寄与する。Since the heat generating layer 11 has a self-temperature control function, if the heat generating temperature is set to a desired temperature,
By simply applying a voltage between the electrodes, the electrical resistance rapidly increases when the temperature exceeds the set temperature, and the set temperature is maintained, so there is no need for temperature detection means or temperature control means, reducing cost and downsizing the device. Contribute.
【００３９】また、発熱層自体にスイッチング機能を有
しているので過熱による断熱性絶縁層１２、離型層１４
の融解の心配がない。Further, since the heating layer itself has a switching function, the heat insulating insulating layer 12 and the release layer 14 due to overheating.
No worries about melting.
【００４０】また、発熱層１１と加熱ドラム１０表面で
ある離型層１４とは、近接しているため、発熱層１１の
熱は、瞬時に離型層１４に伝わり、離型層１４表面の温
度制御を制度良く行なえる。また、加熱ドラム１０表面
をほぼ均一に加熱できるため、複雑な温度制御も必要と
しない。Further, since the heat-generating layer 11 and the release layer 14 which is the surface of the heating drum 10 are close to each other, the heat of the heat-generating layer 11 is instantly transferred to the release layer 14 and the surface of the release layer 14 is exposed. The temperature can be controlled accurately. Further, since the surface of the heating drum 10 can be heated almost uniformly, complicated temperature control is not required.
【００４１】また、加熱ドラム１０、加圧ローラ２０の
径を小さくしやすいため、分離爪を設けなくても転写材
を曲率分離させることが可能である。また、発熱部の表
面積が小さくなるので消費電力も少なくなり、電気回路
の低コスト化、装置の小型化が可能になる。Further, since it is easy to reduce the diameters of the heating drum 10 and the pressure roller 20, it is possible to separate the curvature of the transfer material without providing separation claws. Further, since the surface area of the heat generating portion is small, the power consumption is also small, and the cost of the electric circuit and the size of the device can be reduced.
【００４２】また、発熱層は、その他、セラミック層
等、電圧を印加することによって発熱するものであれば
何でも良い。また、発熱層が自己温度制御機能を有して
いない場合は、サーミスタ等の温度検知手段を加熱ドラ
ム１０の表面に接触させて、温度制御回路によって温度
を調整する。この場合、発熱部と温度検知手段とはきわ
めて近接しているため、敏感な温度制御が行なえる。Further, the heat generating layer may be made of any material such as a ceramic layer as long as it generates heat when a voltage is applied. When the heat generating layer does not have a self-temperature control function, a temperature detecting means such as a thermistor is brought into contact with the surface of the heating drum 10 and the temperature is adjusted by the temperature control circuit. In this case, since the heat generating portion and the temperature detecting means are extremely close to each other, sensitive temperature control can be performed.
【００４３】本実施例１の加熱装置は、例えば、ＬＢＰ
などの定着装置などに用いることができる。The heating device according to the first embodiment is, for example, LBP.
Can be used as a fixing device.
【００４４】〔実施例２〕図２において、加熱フィルム
２１０は、厚さ数１０〜数１００μｍ程度のポリイミド
などの耐熱性樹脂などにより耐熱性絶縁層１２を形成
し、その内側に、厚さ数１０〜数１００μｍ程度の自己
温度制御機構を有する樹脂などによる発熱層２１１を形
成してある。また、耐熱性絶縁層の外側には、厚さ数１
０〜数１００μｍ程度のＰＴＦＥ、ＰＦＡなどのフッ素
樹脂などによる離型層２１４がコーティングされてい
る。[Embodiment 2] In FIG. 2, the heating film 210 has a heat-resistant insulating layer 12 formed of a heat-resistant resin such as polyimide having a thickness of several tens to several hundreds of μm, and the inside thereof has a thickness of several degrees. A heat generating layer 211 made of resin or the like having a self-temperature control mechanism of about 10 to several 100 μm is formed. The thickness of the heat-resistant insulating layer is 1 on the outside.
A release layer 214 made of a fluororesin such as PTFE or PFA having a thickness of 0 to several 100 μm is coated.
【００４５】加熱フィルム２１０は、不図示のばねなど
の加圧部材により、シリコンゴムなどの弾性体を芯金に
一体成型などして構成される加圧ローラ２２０と、ＰＰ
Ｓ等の断熱性部材を射出成型などして形成される断熱性
保持部材２３０とで押圧挟持されている。加圧ローラ２
０は、不図示のギア列などの駆動伝達手段により、不図
示のモータなどの動力源からの動力を伝達され、加熱フ
ィルム２１０を回転させている。加熱フィルム２１０の
発熱層２１１の長手方向の両端部には、リング状に電極
が設けられており、断熱性保持部材２３０の両端部に一
体成型されている給電部２３１と押圧接触しており、電
極間に電圧を印加することにより、発熱層２１１を発熱
させる。発熱層２１１からの熱は、耐熱性絶縁層２１２
を介して離型層２１４を加熱する。The heating film 210 includes a pressure roller 220 formed by integrally molding an elastic body such as silicon rubber on a core metal by a pressure member such as a spring (not shown), and a PP.
It is pressed and sandwiched by a heat insulating holding member 230 formed by injection molding a heat insulating member such as S. Pressure roller 2
0 is transmitted with power from a power source such as a motor (not shown) by a drive transmission means such as a gear train (not shown) to rotate the heating film 210. Electrodes are provided in a ring shape on both ends of the heat generating layer 211 of the heating film 210 in the longitudinal direction, and are in pressure contact with the power feeding parts 231 integrally formed on both ends of the heat insulating holding member 230, The heating layer 211 is heated by applying a voltage between the electrodes. The heat from the heat generating layer 211 is applied to the heat resistant insulating layer 212.
The release layer 214 is heated via.
【００４６】耐熱性保持部材２３０に設けてある給電部
２３１の幅Ｗｅよりも、加圧ローラ２２０のニップ幅Ｗ
ｎの方を広くすることにより、加熱フィルム２１０と給
電部２３１とは、摺動しながら給電されるが、給電部２
３１は常に全面が加熱フィルム２１０と接するため、安
定した給電を行なうことができる。仮に、給電部２３１
が、部分的にくっついたり離れたりすれば、スパークを
発生する。The nip width W of the pressure roller 220 is larger than the width We of the power feeding portion 231 provided on the heat resistant holding member 230.
By making n wider, the heating film 210 and the power feeding unit 231 are fed while sliding, but the power feeding unit 2
Since the entire surface of 31 is always in contact with the heating film 210, stable power supply can be performed. If the power supply unit 231
However, if they are partially stuck or separated, a spark will be generated.
【００４７】本実施例２の加熱装置は、例えば、ＬＢＰ
などの定着装置などに用いることができる。The heating device of the second embodiment is, for example, LBP.
Can be used as a fixing device.
【００４８】〔実施例３〕図３において加熱ドラム３１
０は、厚さ数ｍｍ程度のアルミなどの良熱伝導性ドラム
３１３の内側に厚さ数１０〜数１００μｍ程度のポリイ
ミドなどの耐熱性樹脂などにより耐熱性絶縁層３１２を
形成し、その内側に、厚さ数１０〜数１００μｍ程度の
自己温度制御機構を有する樹脂などによる発熱層３１
１、その内側に厚さ数〜数μｍ程度のアモルファスシリ
コンなどによる太陽光発電層３１５を形成してある。ま
た、良熱伝導性ドラム３１３の外側には、厚さ数１０〜
数１００μｍ程度のＰＴＦＥ、ＰＦＡなどのフッ素樹脂
などによる離型層３１４がコーティングされている。[Embodiment 3] In FIG. 3, a heating drum 31 is used.
0 is a heat-resistant insulating layer 312 made of heat-resistant resin such as polyimide having a thickness of several tens to several hundreds of μm formed inside a good thermal conductive drum 313 made of aluminum having a thickness of several mm, and the like. A heat generating layer 31 made of resin or the like having a self-temperature control mechanism with a thickness of several tens to several hundreds of μm.
1. Inside, a photovoltaic layer 315 made of amorphous silicon or the like having a thickness of several to several μm is formed. Further, on the outside of the good thermal conductive drum 313, a thickness of 10 to 10 is provided.
A release layer 314 made of a fluororesin such as PTFE or PFA having a thickness of several hundred μm is coated.
【００４９】加熱ドラム３１０は、不図示のばねなどの
加圧部材により、シリコンゴムなどの弾性体を芯金に一
体成型などして構成される加圧ローラ３２０と押圧接触
されている。加熱ドラム３１０と加圧ローラ３２０と
は、少なくともどちらか一方が、不図示のギア列などの
駆動伝達手段により、不図示のモータなどの動力源から
の動力を伝達され、加熱ドラム３１０を回転させてい
る。加熱ドラム３１０の内側には、キセノンランプ３４
０などの発光手段が設けられており、光発電層３１５に
より、電力を発電させ、その電力により、発熱層３１１
を発熱させる。発熱層３１１からの熱は、耐熱性絶縁層
３１２、良熱伝導性ドラム３１３を介して離型層３１４
を加熱する。The heating drum 310 is in pressure contact with a pressure roller 320 formed by integrally molding an elastic body such as silicon rubber on a core metal by a pressure member such as a spring (not shown). At least one of the heating drum 310 and the pressure roller 320 is rotated by a power transmission unit such as a gear train (not shown) from a power source such as a motor (not shown) to rotate the heating drum 310. ing. Inside the heating drum 310, the xenon lamp 34
A light emitting means such as 0 is provided, electric power is generated by the photovoltaic layer 315, and the heating layer 311 is generated by the electric power.
Heat up. The heat from the heat generating layer 311 passes through the heat resistant insulating layer 312 and the good thermal conductive drum 313, and then the release layer 314.
To heat.
【００５０】このような構成にすることにより、回転し
ている発熱層３１１へ安定した給電を行なうことができ
る。With such a structure, stable power supply can be performed to the rotating heat generating layer 311.
【００５１】本実施例３の加熱装置は、例えば、ＬＢＰ
などの定着装置などに用いることができる。The heating device of the third embodiment is, for example, LBP.
Can be used as a fixing device.
【００５２】[0052]
【発明の効果】以上説明したように、本発明は、導入記
録材を加熱する加熱装置において、発熱体により加熱さ
れる筒状部材である加熱ドラムと、該加熱ドラムの内周
面に接触する保持ローラと、該加熱ドラムの外周面に接
触する加圧ローラにより構成され、前記加熱ドラムを前
記保持ローラと前記加圧ローラとで挟持し搬送すること
により、加熱ドラムの肉厚を薄くできるため、設定温度
に到達するための所要時間が短く、また、熱効率が良
く、加熱ドラム全面において温度をほぼ均一にできるた
め、複雑な温度制御回路を必要とせず、また、加熱ドラ
ムの径を小さくできるため、曲率分離が可能で、分離爪
を必要としない。As described above, according to the present invention, in the heating device for heating the recording material to be introduced, the heating drum, which is a cylindrical member heated by the heating element, comes into contact with the inner peripheral surface of the heating drum. It is composed of a holding roller and a pressure roller that comes into contact with the outer peripheral surface of the heating drum. Since the heating drum is sandwiched between the holding roller and the pressure roller and conveyed, the thickness of the heating drum can be reduced. The time required to reach the set temperature is short, the thermal efficiency is good, and the temperature can be made almost uniform over the entire heating drum, so a complicated temperature control circuit is not required and the diameter of the heating drum can be reduced. Therefore, the curvature can be separated and the separation claw is not required.
【００５３】また、前記発熱体を面状発熱体とし、前記
加熱ドラムは、熱伝導性の良い基材と前記発熱体とを一
体に構成することなどにより、発熱層と加熱ドラム表面
とを近接することができるので応答速度の速い温度制御
が可能である。Further, the heating element is a planar heating element, and the heating drum is configured such that a base material having good thermal conductivity and the heating element are integrally formed, so that the heating layer and the surface of the heating drum are close to each other. Therefore, temperature control with high response speed is possible.
【００５４】また、発熱層に、自己温度制御機能を備え
た発熱体を用いることで温度検知手段や、温度制御回路
を必要としない加熱装置を提供できるので電気回路の簡
略化が可能で、総じて装置の小型化や部品点数の削減、
低消費電力化が可能であるといった効果が得られる。Further, by using a heating element having a self-temperature control function for the heating layer, it is possible to provide a heating device that does not require a temperature detecting means or a temperature control circuit, so that the electric circuit can be simplified. Miniaturization of the device and reduction of the number of parts,
An effect that power consumption can be reduced can be obtained.
【図１】本発明の実施例１としての加熱装置の断面図で
ある。FIG. 1 is a cross-sectional view of a heating device according to a first embodiment of the present invention.
【図２】本発明の実施例２としての加熱装置の断面図で
ある。FIG. 2 is a sectional view of a heating device as a second embodiment of the present invention.
【図３】本発明の実施例３としての加熱装置の断面図で
ある。FIG. 3 is a cross-sectional view of a heating device as a third embodiment of the present invention.
【図４】従来例の説明図である。FIG. 4 is an explanatory diagram of a conventional example.
１０…加熱ドラム ２０…加圧ロー
ラ ３０…断熱性保持ローラ10 ... Heating drum 20 ... Pressure roller 30 ... Thermal insulation holding roller
Claims (8)
て、発熱体により加熱される筒状部材である加熱ドラム
と、該加熱ドラムの内周面に接触する保持部材と、該加
熱ドラムの外周面に接触する加圧ローラにより構成さ
れ、前記加熱ドラムを前記保持部材と前記加圧ローラと
で挟持し搬送することを特徴とする加熱装置。1. A heating device for heating an introduced recording material, comprising: a heating drum which is a cylindrical member heated by a heating element; a holding member which contacts an inner peripheral surface of the heating drum; and an outer peripheral surface of the heating drum. A heating device comprising a pressure roller in contact with the heating drum, wherein the heating drum is nipped and conveyed by the holding member and the pressure roller.
熱ドラムは、熱伝導性の良い基材と前記発熱体とが一体
に構成されている請求項１記載の加熱装置。2. The heating device according to claim 1, wherein the heating element is a planar heating element, and the heating drum is formed by integrally forming a base material having good thermal conductivity and the heating element.
請求項２記載の加熱装置。3. The heating device according to claim 2, wherein the heating element has a self-temperature control function.
どの離型層を設けた請求項１〜３のいずれかに記載の加
熱装置。4. The heating device according to claim 1, wherein a release layer made of a fluororesin is provided on the surface of the heating drum.
れる請求項１〜４のいずれかに記載の加熱装置。5. The heating device according to claim 1, wherein the holding member includes a heat insulating member.
供給する給電部材を設け、前記加熱ドラムの内周面に電
力を供給される部分を設けたことを特徴とする請求項２
ないし５のいずれかに記載の加熱装置。6. The power supply member for supplying electric power to the planar heating element is provided on the holding member, and a portion to which electric power is supplied is provided on an inner peripheral surface of the heating drum.
The heating device according to any one of 1 to 5.
の押圧接触部の幅の方を広くしたことを特徴とする請求
項２ないし５のいずれかに記載の加熱装置。7. The heating device according to claim 2, wherein a width of a pressing contact portion of the pressure roller is wider than a width of the power feeding member.
て、面状発熱体層と光発電層とを含む加熱ドラムと、光
源と、加圧ローラにより構成されることを特徴とする加
熱装置。8. A heating device for heating an introduced recording material, comprising a heating drum including a planar heating element layer and a photovoltaic layer, a light source, and a pressure roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31829493A JP3153061B2 (en) | 1993-12-17 | 1993-12-17 | Heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31829493A JP3153061B2 (en) | 1993-12-17 | 1993-12-17 | Heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07175354A true JPH07175354A (en) | 1995-07-14 |
| JP3153061B2 JP3153061B2 (en) | 2001-04-03 |
Family
ID=18097600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31829493A Expired - Fee Related JP3153061B2 (en) | 1993-12-17 | 1993-12-17 | Heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3153061B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5832354A (en) * | 1995-12-05 | 1998-11-03 | Ricoh Company, Ltd. | Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside |
-
1993
- 1993-12-17 JP JP31829493A patent/JP3153061B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5832354A (en) * | 1995-12-05 | 1998-11-03 | Ricoh Company, Ltd. | Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3153061B2 (en) | 2001-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |