JPS63146375A - Roll heater - Google Patents
Roll heaterInfo
- Publication number
- JPS63146375A JPS63146375A JP29145186A JP29145186A JPS63146375A JP S63146375 A JPS63146375 A JP S63146375A JP 29145186 A JP29145186 A JP 29145186A JP 29145186 A JP29145186 A JP 29145186A JP S63146375 A JPS63146375 A JP S63146375A
- Authority
- JP
- Japan
- Prior art keywords
- roll heater
- heating element
- roll
- heater according
- main body
- 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 description 37
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910018084 Al-Fe Inorganic materials 0.000 claims 1
- 229910018192 Al—Fe Inorganic materials 0.000 claims 1
- 229910019589 Cr—Fe Inorganic materials 0.000 claims 1
- 238000010292 electrical insulation Methods 0.000 claims 1
- 230000020169 heat generation Effects 0.000 description 7
- 239000012212 insulator Substances 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は複写機等に用いられる加熱定着用等のロールヒ
ータに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a roll heater for heating and fixing used in copying machines and the like.
（従来の技術）
従来、ロールヒータ例えば複写機等に用いられるロール
ヒータ即ち加熱定着ヒータ等は、熱伝導の良好な金属製
の中空本体の中空部にハロゲンランプ、あるいはニクロ
ム線等の発熱体を配し、中空本体を加熱して用いられて
いた。しかし上記ロールヒータでは発熱体の輻射熱によ
り本体を加熱するため熱効率が悪く、そのため加熱時間
が長く（温度上昇が遅く）ロールヒータの軸方向におい
て発熱分布が不均一になるという問題がめった。(Prior Art) Conventionally, roll heaters, ie, heat fixing heaters, etc. used in copying machines, etc., have a heating element such as a halogen lamp or nichrome wire in the hollow part of a hollow metal body with good heat conduction. It was used by heating the hollow body. However, the roll heater described above has poor thermal efficiency because the main body is heated by the radiant heat of the heating element, and therefore the heating time is long (temperature rise is slow), resulting in a frequent problem of uneven heat generation distribution in the axial direction of the roll heater.
このため近年、ロールヒータの加熱時間の短縮および熱
効率の向上及び発熱分布を一定にづるために、ロールヒ
ータの本体表面にＴ！（ｈあるいは５ｎ０２等の発熱体
及び最外表面に絶縁体を被覆したちのが考えられている
。For this reason, in recent years, in order to shorten the heating time of roll heaters, improve thermal efficiency, and maintain a constant heat generation distribution, T! (It is considered that the heating element such as H or 5n02 and the outermost surface are coated with an insulator.
（発明が解決しようとする問題点）
従来のロールヒータの本体表面に発熱体を被覆したもの
は、最外表面が絶縁体で被覆されているのみであり熱容
量が小さく、ヒータ表面の温度が例えば複写機において
は紙の挿入毎に低下してしまい、そのため複写用紙への
トナーの定着等が不十分とする場合があった。また、発
熱体の抵抗値が使用中に変化してしまう等の使用劣化を
引き起す場合があった。また発熱体を溶射、塗装等にＪ
：り被覆した場合等は発熱体層の層厚が一定となりにく
く、必ずしも温度ムラが防げたわけではなかった。(Problems to be Solved by the Invention) Conventional roll heaters in which the surface of the main body is coated with a heating element have only the outermost surface covered with an insulator and have a small heat capacity, and the temperature of the heater surface may be In a copying machine, the toner density decreases each time paper is inserted, and as a result, toner fixation on the copy paper may be insufficient. Further, there have been cases where the resistance value of the heating element changes during use, causing deterioration in use. In addition, heating elements can be thermally sprayed, painted, etc.
: When the heat generating layer was coated with a heat-generating layer, the thickness of the heat generating layer was difficult to be constant, and temperature unevenness could not necessarily be prevented.
ざらに、中空本体の表面に発熱体を設Ｃプたロールヒー
タでは熱伝導が良好なためにスイッチのオン、オフによ
る加熱冷却での温度変化が急激になりやすく、この場合
には従来の温度制御では発熱状態を均一に保つことが難
かしかった。Roughly speaking, roll heaters with a heating element installed on the surface of a hollow body have good heat conduction, so temperature changes tend to be rapid during heating and cooling when the switch is turned on and off. It was difficult to maintain uniform heat generation through control.
したがって、本発明はロールヒータの温度上昇に要する
時間が短かく、適度な熱容量を有し発熱分布が均一でか
つ温度変化が少なく、安定したロールヒータを提供する
ことを目的とする。Therefore, an object of the present invention is to provide a stable roll heater that takes a short time to raise the temperature of the roll heater, has an appropriate heat capacity, has a uniform heat generation distribution, and has little temperature change.
［発明の概要］
（問題点を解決するための手段］
本発明のロールヒータは、金属あるいはセラミックより
なる本体表面に電気絶縁層を介して薄体状の発熱体を設
け、さらに前記発熱体上に電気絶縁層を設置ブ、最外表
面を金属で覆うことを特徴とするものである。[Summary of the Invention] (Means for Solving the Problems) The roll heater of the present invention has a thin heating element provided on the surface of the main body made of metal or ceramic with an electrically insulating layer interposed therebetween, and further includes a thin heating element on the heating element. It is characterized by having an electrically insulating layer installed on the surface and covering the outermost surface with metal.
この場合の薄体状の発熱体は、例えばＣｒ１９〜２１％
を含有し、残部実質的にＮｉよりなるＱｒ−Ｎｉ系合金
、Ｃｒ１９〜２１％を含有し、残部実質的にＦｅよりな
る０ｒ−Ｆｅ系合金、またはＣｒ１８〜２２％、Ａ１４
．５〜５．５％を含有し、残部実質的にＦｅよりなるＣ
ｒ−ＡＥ−Ｆｅ系合金等で形成したリボンおるいはシー
ト状の発熱体が好ましい。これは発熱体を本体に設ける
際は、これらの発熱体の本体に巻装することによる簡単
な工程でロールヒータの発熱体を設けることが可能とな
るためである。In this case, the thin heating element is made of 19 to 21% Cr, for example.
Qr-Ni alloy containing Cr and the remainder substantially consisting of Ni, Or-Fe alloy containing 19 to 21% Cr and the remainder substantially consisting of Fe, or 18 to 22% Cr, A14
．． 5 to 5.5%, with the remainder essentially consisting of Fe.
A ribbon or sheet-shaped heating element made of an r-AE-Fe alloy or the like is preferred. This is because when providing the heating element in the main body, the heating element of the roll heater can be provided in a simple process by wrapping the heating element around the main body.
さらに、発熱体は線状のものと異なり、発熱面積が大き
く、有効にムラなく発熱を行うことができる。これら発
熱体は、例えばスリットおよび／または孔部を設けて通
電部分の導体断面積を減少させることにより容易に抵抗
を調整することが可能であり、発熱の効率が向上できる
。Furthermore, unlike a linear heating element, the heating element has a large heating area and can generate heat effectively and evenly. The resistance of these heating elements can be easily adjusted by, for example, providing slits and/or holes to reduce the cross-sectional area of the conductor in the current-carrying portion, and the efficiency of heat generation can be improved.
電気絶縁層は無機ガラス等のガラス繊維よりなるテープ
状のものを用いると絶縁層を設ける工程がこのテープ状
の絶縁材を巻装するのみで良く、工程の簡略化を図るこ
とができる。おるいはマグネシア（ＭｇＯ）、アルミナ
（Ａ１２０３）等のセラミック粉末を溶射面るいはペー
ストとして塗布することや雲母、アスベストシート等の
絶縁物を利用しても良い。ざらに絶縁層を厚くすること
により耐電圧、絶縁性を向上するには、ガラス繊維にセ
ラミック粉末を介在させること等が考えられる。また使
用温度が低い場合、例えば２００’ｃｊＸ下の場合はシ
リコン等を用いても良い。When a tape-shaped electrical insulating layer made of glass fibers such as inorganic glass is used, the step of providing the insulating layer only requires wrapping the tape-shaped insulating material, and the process can be simplified. Alternatively, ceramic powder such as magnesia (MgO) or alumina (A1203) may be sprayed or applied as a paste, or an insulating material such as mica or asbestos sheet may be used. In order to improve the withstand voltage and insulation properties by increasing the thickness of the insulating layer, it is possible to interpose ceramic powder in the glass fibers. Further, when the operating temperature is low, for example, below 200'cjX, silicon or the like may be used.
本発明のロールヒータは最外表面を金属で覆うものであ
る。最外表面を覆う金属としては銅あるいはアルミニウ
ム等の熱伝導性の良好な金属が好ましい。この金属層は
、ロールヒータの発熱分布を均一にするとともに熱容量
を増大させ、安定した発熱状態をもたらＴものである。The roll heater of the present invention has its outermost surface covered with metal. The metal covering the outermost surface is preferably a metal with good thermal conductivity such as copper or aluminum. This metal layer makes the heat generation distribution of the roll heater uniform, increases the heat capacity, and brings about a stable heat generation state.
この金属は例えば金属筒とし、ロールヒータの本体を内
部に挿入し、その後全体を減径することにより本体と密
に接合することが可能となる。This metal can be made into a metal cylinder, for example, and by inserting the main body of the roll heater inside and then reducing the diameter of the entire body, it is possible to closely join the main body.
本願のロールヒータの本体は、金属またはセラミックの
いずれでも良い。本体に金属を用いると最外表面を金属
で覆った後の減径が容易に行える。また本体にセラミッ
クを用いると、耐熱性は良好であり、熱による酸化も起
こらず本体と発熱体間の絶縁層を省略することが可能で
ある。The main body of the roll heater of the present application may be made of metal or ceramic. If metal is used for the main body, the diameter can be easily reduced after covering the outermost surface with metal. Further, when ceramic is used for the main body, heat resistance is good, oxidation due to heat does not occur, and an insulating layer between the main body and the heating element can be omitted.
ところで、ロールヒータの温度制御には独立した制御回
路が必要であるため、ロールヒータを組合せた装置の縮
小化が困難な場合があった。By the way, since an independent control circuit is required to control the temperature of the roll heater, it may be difficult to downsize an apparatus in which the roll heater is combined.
このため例えばチタン酸バリウム等の１丁Ｃ特性を有す
る部材をロールヒータに組合せ、温度制御を行うことに
より、制御回路を不要とし、装置の縮小化および簡略化
を計ることが可能となる。おるいは発熱体に例えばＦｅ
２５〜３５％を含むＦｅ−Ｎｉ系合金を用いることによ
りこのＦｅ−Ｎｉ系合金の温度による抵抗変化で温度ｉ
ｔｌＩＩｗＪを行うことが可能となる。このようにすれ
ば制御回路を用いずに自己の温度変化による抵抗変化に
より温度制御を行う手段を用いることで、一層温度を一
定に保つことが可能となる。Therefore, by combining a member having the 1-C characteristic, such as barium titanate, with a roll heater and controlling the temperature, a control circuit is not required, and the apparatus can be downsized and simplified. Or, for example, Fe in the heating element.
By using a Fe-Ni alloy containing 25 to 35%, the temperature i
It becomes possible to perform tlIIwJ. In this way, it becomes possible to keep the temperature even more constant by using a means for controlling the temperature by changing the resistance due to the temperature change of the device itself without using a control circuit.
（作用）
本体表面に電気絶縁層を介して薄体状の発熱体を設ける
ことにより、ロールヒータ全体を均一に加熱することが
できる。(Function) By providing a thin heating element on the surface of the main body via an electrically insulating layer, the entire roll heater can be heated uniformly.
また、最外表面を金属で覆うことにより熱容量を増大す
ることができ、例えば複写機の定着用ヒータとして用い
た場合にも、紙の挿入ごとにロールヒータの表面温度が
下がることはない。Furthermore, by covering the outermost surface with metal, the heat capacity can be increased, and even when used as a fixing heater in a copying machine, for example, the surface temperature of the roll heater does not drop each time paper is inserted.
さらに、スイッチのオン、オフによる加熱冷却による温
度変化も急激に変化せず一定の温１宴保持が容易に行え
る。Furthermore, temperature changes due to heating and cooling caused by turning the switch on and off do not change suddenly, making it easy to maintain a constant temperature.
（実施例） 本発明の一実施例を図面を用いて説明する。(Example) An embodiment of the present invention will be described with reference to the drawings.
第１図は本発明のロールヒータの一実施例でおる。即ち
、ステンレスよりなる外径２５履、内径２３＃本体１表
面に溶射によりグネシア（ＭｇＯ）の電気絶縁物を絶縁
物層２として厚ざＯ１５・〜１ 、 Ｏｍｍ Ｒ９，け
ている。次に例えば巾２．５〜５馴のリボン状のＮｉ−
Ｃｒ合金材よりなる発熱体３を巻装する。この際リボン
状の発熱体はスリブ！・または孔を設けることにより抵
抗値を向上する口とが可能でおる。このリボンを巻装す
る際のリボンの間隙は約３Ｎｎ以下が好ましい。これは
あまり間隙が開くと温度分布が不均一となるためである
。ざらに表面に絶縁物層２を設ける。これは、ガラスｗ
４維等よりなるテープ（幅１０〜２０ｍ＞を巻装しても
良い。ざらに表面をＡＲ，よりなる金属筒４で覆う。つ
いで全体を減径することにＪ：り本体と密に接合し、直
径３０〜３５ｍのロールヒータを１ｑだ。この日−ルヒ
ータにより熱分布を良好にすると共に、ロールヒータの
熱容量を増大し、紙の挿入によるヒータ表面の温度低下
を防止することが可能である。FIG. 1 shows an embodiment of the roll heater of the present invention. That is, an electrical insulator of gnesia (MgO) is applied as an insulator layer 2 by thermal spraying onto the surface of the main body 1, which is made of stainless steel and has an outer diameter of 25 mm and an inner diameter of 23 mm. Next, for example, a ribbon-shaped Ni-
A heating element 3 made of a Cr alloy material is wrapped. In this case, the ribbon-shaped heating element is a sleeve!・Alternatively, by providing holes, it is possible to improve the resistance value. When winding this ribbon, the gap between the ribbons is preferably about 3Nn or less. This is because if the gap is too large, the temperature distribution will become non-uniform. An insulating layer 2 is provided roughly on the surface. This is glass lol
A tape made of 4 fibers (width 10 to 20 m) may be wrapped.Roughly cover the surface with a metal tube 4 made of AR.Then, reduce the diameter of the whole and tightly join it to the main body. A roll heater with a diameter of 30 to 35 m costs 1q.This daily roll heater improves heat distribution, increases the heat capacity of the roll heater, and prevents the temperature of the heater surface from decreasing due to insertion of paper. be.
上記本発明のロールヒータには温度を一定に保つために
温度制御装置が必要であるが、ロールヒータにＰＴＣ特
性を有する部材であるチタン酸バリウムからなる素子を
組合せることにより、温度制御装置が不要となり、装置
の小型化を図ることができる。The roll heater of the present invention requires a temperature control device to keep the temperature constant, but by combining the roll heater with an element made of barium titanate, which is a member having PTC characteristics, the temperature control device can be adjusted. This becomes unnecessary, and the device can be made smaller.
本発明のロールヒータは従来のロールヒータに比較して
１１５・〜１／１０の短時間で所定の温度に上昇する。The roll heater of the present invention rises to a predetermined temperature in a short time of 115 to 1/10 compared to conventional roll heaters.
（発明の効果） 、
本発明のロールヒータにより温度上昇に要する時間が短
かく適度な熱容量を有し、温度変化が少ないロールヒー
タを提供することができる。(Effects of the Invention) The roll heater of the present invention can provide a roll heater that takes a short time to raise the temperature, has an appropriate heat capacity, and exhibits little temperature change.
第１図は本発明のロールヒータの一実施例であるロール
ヒータの一部切欠断面図である。FIG. 1 is a partially cutaway sectional view of a roll heater which is an embodiment of the roll heater of the present invention.
Claims (10)
して薄体状の発熱体を設け、さらに前記発熱体上に電気
絶縁層を設け最外表面を金属で覆うことを特徴とするロ
ールヒータ。(1) A thin heating element is provided on the surface of the cylindrical or cylindrical main body via an electrical insulating layer, an electrical insulating layer is further provided on the heating element, and the outermost surface is covered with metal. roll heater.
特許請求の範囲第１項に記載のロールヒータ。(2) The roll heater according to claim 1, wherein the heating element is a ribbon-shaped or sheet-shaped heating element.
る特許請求の範囲第１項に記載のロールヒータ。(3) The roll heater according to claim 1, wherein the heating element is provided with slits and/or holes.
マグネシア、アルミナ、シリコンのいずれか１種である
特許請求の範囲第１項に記載のロータヒータ。(4) The electrical insulation layer is made of inorganic glass, mica, asbestos,
The rotor heater according to claim 1, which is made of one of magnesia, alumina, and silicon.
載のロールヒータ。(5) The roll heater according to claim 1, wherein the main body is made of metal.
に記載のロールヒータ。(6) The roll heater according to claim 1, wherein the main body is made of ceramic.
にＮｉよりなるＣｒ−Ｎｉ系合金、Ｃｒ１９〜２１％を
含有し、残部実質的にＦｅよりなるＣｒ−Ｆｅ系合金、
またはＣｒ１８〜２２％、Ａｌ４．５〜５．５％を含有
し残部実質的にＦｅよりなるＣｒ−Ａｌ−Ｆｅ系合金よ
り構成されてなる特許請求の範囲第１項に記載のロール
ヒータ。(7) The heating element contains a Cr-Ni alloy containing 19 to 21% Cr and the remainder substantially consists of Ni; a Cr-Fe alloy containing 19 to 21% Cr and the remainder substantially consisting of Fe;
The roll heater according to claim 1, comprising a Cr-Al-Fe alloy containing 18 to 22% of Cr, 4.5 to 5.5% of Al, and the remainder substantially consisting of Fe.
的にＮｉよりなるＦｅ−Ｎｉ系合金より構成されてなる
特許請求の範囲第１項に記載のロールヒータ。(8) The roll heater according to claim 1, wherein the heating element is made of a Fe--Ni alloy containing 25% to 35% of Fe, with the remainder being substantially Ni.
許請求の範囲第１項に記載のロールヒータ。(9) The roll heater according to claim 1, wherein the metal on the outermost surface is copper or aluminum.
されてなる特許請求の範囲第１項に記載のロールヒータ
。(10) The roll heater according to claim 1, wherein the roll heater is combined with a member having PTC characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29145186A JPS63146375A (en) | 1986-12-09 | 1986-12-09 | Roll heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29145186A JPS63146375A (en) | 1986-12-09 | 1986-12-09 | Roll heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63146375A true JPS63146375A (en) | 1988-06-18 |
Family
ID=17769037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29145186A Pending JPS63146375A (en) | 1986-12-09 | 1986-12-09 | Roll heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63146375A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0592990U (en) * | 1992-05-26 | 1993-12-17 | 菱有工業株式会社 | Tubular heater |
-
1986
- 1986-12-09 JP JP29145186A patent/JPS63146375A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0592990U (en) * | 1992-05-26 | 1993-12-17 | 菱有工業株式会社 | Tubular heater |
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