JPH0816006A - Heating apparatus and image forming apparatus - Google Patents
Heating apparatus and image forming apparatusInfo
- Publication number
- JPH0816006A JPH0816006A JP16877394A JP16877394A JPH0816006A JP H0816006 A JPH0816006 A JP H0816006A JP 16877394 A JP16877394 A JP 16877394A JP 16877394 A JP16877394 A JP 16877394A JP H0816006 A JPH0816006 A JP H0816006A
- Authority
- JP
- Japan
- Prior art keywords
- heating
- magnetic field
- film
- generating means
- heated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電磁（磁気）誘導加熱方
式の加熱装置、および該加熱装置を画像加熱定着装置と
して備えた画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device of an electromagnetic (magnetic) induction heating system, and an image forming apparatus provided with the heating device as an image heating and fixing device.
【０００２】[0002]
【従来の技術】昨今、ＯＡ機器の省エネルギー動向か
ら、プリンター・複写機等に用いられる加熱装置として
の画像加熱定着装置としては、省エネルギーおよびクイ
ックスタート性を両立させるために、従来一般的な熱ロ
ーラ方式の定着装置に代えて、フィルム加熱方式の定着
装置が低速機分野で一部実用化されている。2. Description of the Related Art In recent years, due to the trend of energy saving in office automation equipment, an image heating and fixing device as a heating device used in printers, copiers, etc., has a conventional general heat roller in order to achieve both energy saving and quick start property. A film heating type fixing device has been partially put into practical use in the field of low-speed machines instead of the fixing device of the type.
【０００３】フィルム加熱方式の装置は特開昭６３−３
１３１８２号公報・特開平２−１５７８７８号公報・特
開平４−４４０７５号公報・特開平４−２０４９８０号
公報等に提案されている。即ち、加熱体（一般にセラミ
ックヒータ、以下ヒータと記す）と、該ヒータに密着し
て移動する耐熱性フィルムを有し、このフィルム介して
被加熱体をヒータに密着させてフィルムと一緒にヒータ
位置を移動させヒータの熱エネルギーをフィルムを介し
て被加熱体に付与する加熱装置である。フィルム・被加
熱体をヒータに密着させる加圧部材を有している。A film heating type apparatus is disclosed in JP-A-63-3.
13182, JP-A-2-157878, JP-A-4-44075, JP-A-4-204980. That is, it has a heating body (generally referred to as a ceramic heater, hereinafter referred to as a heater) and a heat-resistant film that moves in close contact with the heater. Is a heating device for moving the heat source to apply the heat energy of the heater to the object to be heated through the film. It has a pressurizing member that brings the film and the object to be heated into close contact with the heater.
【０００４】画像定着動作は、フィルムを挟んでヒータ
と加圧部材との圧接により形成される定着ニップ部のフ
ィルムと加圧部材との間に被加熱体としての被記録材を
導入通過させることにより被記録材の顕画像担持体面を
フィルムを介してヒータで加熱して、未定着トナー像に
熱エネルギーを付与し、トナーを軟化・溶融させること
で行なわれる。In the image fixing operation, a recording material as a heated body is introduced and passed between a film and a pressing member in a fixing nip portion formed by pressing a heater and a pressing member with the film interposed therebetween. The heating is performed by heating the surface of the recording material on which the developed image is carried with a heater through a film to apply thermal energy to the unfixed toner image to soften and melt the toner.
【０００５】また、定着装置に限らず、例えば画像を担
持した被記録材を加熱して艶等の表面性を改質する装
置、仮定着する装置等、その他広く被加熱材を加熱処理
する手段・装置として使用できる。Further, not limited to the fixing device, for example, a device for heating a recording material carrying an image to modify the surface property such as gloss, a hypothetical fixing device, and other various means for heat-treating the heating material. -Can be used as a device.
【０００６】このようなフィルム加熱方式の装置には、
低熱容量のヒータを用いることができるので、熱ローラ
方式に比べ、ウェイトタイムの短縮化（クイックスター
ト）が可能となる。また、クイックスタートが可能とな
ったことにより、予めヒータを昇温させておく必要がな
いので、消費電力を小さくすることができ、また機内昇
温も防止できる。In such a film heating type apparatus,
Since a heater having a low heat capacity can be used, the wait time can be shortened (quick start) as compared with the heat roller method. Further, since the quick start is possible, it is not necessary to raise the temperature of the heater in advance, so that it is possible to reduce the power consumption and prevent the temperature rise inside the machine.
【０００７】しかしながらこのようなフィルム加熱方式
の装置も高速化を図る場合、フィルムの厚膜化を図る必
要があり、その場合にはその厚膜フィルムが熱抵抗とな
ってヒータから被加熱材である被記録材への熱伝達を著
しく損ない、フィルム加熱方式の装置の特長である省エ
ネルギー・クイックスタート性が損なわれる。However, in order to increase the speed of such a film heating type apparatus as well, it is necessary to increase the thickness of the film. In that case, the thick film becomes a thermal resistance and the material to be heated from the heater. The heat transfer to a certain recording material is significantly impaired, and the energy saving and quick start characteristics, which are the features of the film heating system, are impaired.
【０００８】そこで本発明者等はフィルム自体を発熱さ
せることでフィルムが熱抵抗とならないようにして熱効
率を向上させた電磁誘導加熱方式・フィルム加熱方式の
加熱装置の研究を行なってきた。Therefore, the inventors of the present invention have conducted research on a heating device of an electromagnetic induction heating system / film heating system in which the film itself does not generate heat resistance by heating the film itself and the thermal efficiency is improved.
【０００９】これは磁界発生手段、例えば磁性体である
芯材とコイルを組み合わせることによって発生する磁場
を励磁回路で変化させ、その磁場の中を移動する導電部
材（誘導磁性材、磁界吸収導電材）としての、フィルム
の中の導電層に渦電流を発生させるものである。この渦
電流が導電層の電気抵抗によって熱（ジュール熱）に変
換し、結果的に被加熱材に密着するフィルムのみが発熱
する加熱装置であり、熱効率が優れている。This is a conductive member (inductive magnetic material, magnetic field absorbing conductive material) that moves in the magnetic field by changing the magnetic field generated by a magnetic field generating means, for example, a core material which is a magnetic material and a coil, in an exciting circuit. ), Which generates an eddy current in the conductive layer in the film. This eddy current is converted into heat (Joule heat) by the electric resistance of the conductive layer, and as a result, only the film that is in close contact with the material to be heated generates heat, and the thermal efficiency is excellent.
【００１０】即ち、変動する磁界が導体中を横切ると
き、その磁界の変化を妨げる磁界を発生させるようにフ
ィルムの導電層には渦電流が発生する。この渦電流がフ
ィルムの導電層の表皮抵抗により、表皮抵抗に比例した
電力でフィルムの導電層を発熱させる。このようにフィ
ルムの表層近くを直接発熱させるので、フィルム基層の
熱伝導率、熱容量によらず急速に加熱できる利点があ
る。また、フィルムの厚さにも依存しない急速加熱が実
現できる。That is, when a fluctuating magnetic field traverses the conductor, an eddy current is generated in the conductive layer of the film so as to generate a magnetic field that prevents the change of the magnetic field. This eddy current causes the skin resistance of the conductive layer of the film to generate heat in the conductive layer of the film with an electric power proportional to the skin resistance. Since heat is generated directly near the surface layer of the film, there is an advantage that heating can be performed rapidly regardless of the thermal conductivity and heat capacity of the film base layer. In addition, rapid heating that does not depend on the film thickness can be realized.
【００１１】これにより省エネルギー・クイックスター
ト性を損なうことなく、フィルム基層の高剛性の厚膜化
を図り、高速化に対処することが可能である。Thus, it is possible to achieve a high-rigidity thick film of the film base layer without sacrificing energy saving and quick start properties, and to cope with high speed.
【００１２】[0012]
【発明が解決しようとする課題】このような電磁誘導方
式の装置において磁界発生手段は一般に励磁鉄心（芯
材）に巻回してなる励磁コイルから構成され、被加熱材
の搬送方向と交差する方向を長手とする、被加熱材の最
大通紙幅に対応する長さ寸法の一連の横長部材であり、
励磁コイルに対する通電によりその被加熱材の最大通紙
幅に対応する導電部材幅領域が発熱する。In such an electromagnetic induction type apparatus, the magnetic field generating means is generally constituted by an exciting coil wound around an exciting iron core (core material), and the magnetic field generating means intersects the direction in which the material to be heated is conveyed. Is a series of horizontally long members having a length dimension corresponding to the maximum sheet passing width of the material to be heated,
When the exciting coil is energized, the conductive member width region corresponding to the maximum sheet passing width of the heated material generates heat.
【００１３】そのため最大通紙幅よりも小サイズ幅の被
加熱材を通紙した場合、非通紙部領域において過昇温を
生じて（非通紙部過昇温）、励磁鉄心の透磁率が変化し
通紙部領域においても発熱量が不安定となる。また励磁
コイル部の昇温が大きいと励磁コイルの劣化を促進して
しまうという問題があった。Therefore, when a material to be heated having a width smaller than the maximum paper-passing width is passed, an excessive temperature rise occurs in the non-sheet-passing area (non-sheet-passing portion excessive temperature rise), and the magnetic permeability of the exciting core is increased. The amount of heat generated becomes unstable even in the paper passing area. Further, there is a problem that the deterioration of the exciting coil is promoted if the temperature rise of the exciting coil portion is large.
【００１４】そこで本発明は電磁誘導方式の加熱装置に
ついて、上述の非通紙部過昇温現象を防止し、通紙部領
域の発熱分布を一様化させて被加熱材の安定した加熱処
理が実行できるようにすることを目的とする。In view of the above, the present invention relates to an electromagnetic induction type heating device, which prevents the above-mentioned phenomenon of excessive temperature rise in the non-sheet passing portion and makes the heat generation distribution in the sheet passing portion area uniform, thereby performing stable heat treatment of the material to be heated. The goal is to be able to do.
【００１５】[0015]
【課題を解決するための手段】本発明は下記の構成を特
徴とする加熱装置および画像形成装置である。The present invention is a heating device and an image forming apparatus characterized by the following configurations.
【００１６】（１）固定もしくは移動する導電部材に磁
場を作用させて該導電部材に発生する渦電流による発熱
により該導電部材に直接もしくは間接に接して搬送され
る被加熱材を加熱する電磁誘導加熱方式の加熱装置であ
り、前記磁場発生手段が被加熱材の搬送方向と交差する
方向において分割して構成されている事を特徴とする加
熱装置。(1) Electromagnetic induction for heating a material to be heated which is conveyed in direct or indirect contact with the conductive member due to heat generated by an eddy current generated in the conductive member by applying a magnetic field to the fixed or moving conductive member. A heating device of a heating type, wherein the magnetic field generating means is divided and configured in a direction intersecting a conveyance direction of a material to be heated.
【００１７】（２）分割して構成された磁場発生手段の
分割磁場発生手段間に補助の磁場発生手段を配設した事
を特徴とする（１）に記載の加熱装置。(2) The heating device according to (1), characterized in that an auxiliary magnetic field generating means is arranged between the divided magnetic field generating means of the magnetic field generating means constituted by division.
【００１８】（３）分割して構成された磁場発生手段の
分割磁場発生手段の少なくとも１部に減磁手段を配設し
た事を特徴とする（１）に記載の加熱装置。(3) The heating device according to (1), characterized in that the demagnetizing means is provided in at least a part of the divided magnetic field generating means of the magnetic field generating means constituted by division.
【００１９】（４）磁場発生手段、補助の磁場発生手
段、減磁手段が交番電流が流される励磁コイルもしくは
減磁コイルである事を特徴とする（１）乃至（３）の何
れかに記載の加熱装置。(4) The magnetic field generating means, the auxiliary magnetic field generating means, and the demagnetizing means are exciting coils or demagnetizing coils through which an alternating current flows, and are described in any one of (1) to (3). Heating device.
【００２０】（５）導電部材に被加熱部材を直接もしく
は間接的に密着させる加圧部材を有する事を特徴とする
（１）乃至（４）の何れかに記載の加熱装置。(5) The heating device according to any one of (1) to (4), further comprising a pressing member for directly or indirectly adhering the member to be heated to the conductive member.
【００２１】（６）加圧部材が回転駆動されるあるいは
従動回転する加圧回転体である事を特徴とする（５）に
記載の加熱装置。(6) The heating device according to (5), wherein the pressure member is a pressure rotating body which is rotationally driven or driven to rotate.
【００２２】（７）導電部材が回転エンドレス部材ある
いは走行移動有端部材である事を特徴とする（１）乃至
（６）の何れかに記載の加熱装置。(7) The heating device according to any one of (1) to (6), wherein the conductive member is a rotary endless member or a traveling / moving end member.
【００２３】（８）導電部材が導電層を含む積層部材も
しくはそれ自体導電性の部材である事を特徴とする
（１）乃至（７）の何れかに記載の加熱装置。(8) The heating device according to any one of (1) to (7), wherein the conductive member is a laminated member including a conductive layer or a member itself conductive.
【００２４】（９）被加熱材が未定着画像を担持させた
被記録材であり、該被記録材に未定着画像を加熱定着さ
せる画像加熱定着装置である事を特徴とする（１）乃至
（８）の何れかに記載の加熱装置。(9) The heating target material is a recording material supporting an unfixed image, and the image heating fixing device heat-fixes the unfixed image on the recording material (1) to 1). The heating device according to any one of (8).
【００２５】（１０）前記（１）乃至（９）の何れかに
記載の加熱装置を被記録材に未定着画像を加熱定着させ
る画像加熱定着装置として備えている事を特徴とする画
像形成装置。(10) An image forming apparatus comprising the heating device according to any one of (1) to (9) as an image heating and fixing device for heating and fixing an unfixed image on a recording material. .
【００２６】[0026]
【作用】被加熱材の最大通紙幅にわたる長さ寸法の磁場
発生手段を被加熱材の通紙幅方向、即ち被加熱材の搬送
方向と交差（直交）する方向にいくつかに分割して構成
し、それ等の個々の分割磁場発生手段を装置に使用され
る被加熱材の幅サイズの大小に応じて選択的に磁場発生
制御するものであり、装置に使用される被加熱材が最大
通紙幅に対応する大サイズ幅のものであるときは全ての
分割磁場発生手段を磁場発生状態に制御することで最大
通紙幅に対応する導電部材の幅領域が発熱して該大サイ
ズ幅の被加熱材に対応することができ、装置に使用され
る被加熱材が最大通紙幅よりも小サイズ幅のものである
ときはこの小サイズ幅の被加熱材の通紙部領域に対応し
ている分割磁場発生手段については磁場発生状態に制御
し、非通紙部領域に対応している分割磁界発生手段につ
いては磁場を発生させないように制御することで、該小
サイズ幅の被加熱材の通紙部領域に対応する導電部材幅
領域だけが発熱して、小サイズ幅の被加熱材について非
通紙部過昇温現象を発生させることなく加熱処理を実行
させることが可能となる。The magnetic field generating means having a length dimension that extends over the maximum paper-passing width of the heated material is divided into several parts in the paper-passing direction of the heated material, that is, in the direction intersecting (orthogonal to) the conveying direction of the heated material. , The individual magnetic field generation means are selectively controlled to generate a magnetic field according to the size of the width of the heated material used in the apparatus, and the heated material used in the apparatus has the maximum sheet passing width. In the case of a large size width corresponding to the above, by controlling all the divided magnetic field generating means to the magnetic field generating state, the width area of the conductive member corresponding to the maximum sheet passing width generates heat and the heated material of the large size width. If the material to be heated used in the device has a size smaller than the maximum sheet passing width, the divided magnetic field corresponding to the sheet passing part area of the material to be heated of this small size width can be applied. The generation means is controlled to the magnetic field generation state, and the non-sheet passing area By controlling the corresponding divided magnetic field generating means so as not to generate a magnetic field, only the conductive member width area corresponding to the sheet passing area of the heated material having the small size width generates heat, and the small size width It is possible to perform the heating process on the material to be heated without causing the excessive temperature rise phenomenon of the non-sheet passing portion.
【００２７】また通紙部領域に対応する導電部材部分の
発熱分布を一様化し、安定した被加熱材加熱処理が可能
となった。Further, the heat generation distribution of the conductive member portion corresponding to the paper passing portion area is made uniform, and stable heat treatment of the material to be heated becomes possible.
【００２８】分割して構成された磁場発生手段の分割磁
場発生手段間に補助の磁場発生手段を配設することで分
割磁場発生手段間の不均一磁界による発熱分布の下降分
を補償できる。By disposing the auxiliary magnetic field generating means between the divided magnetic field generating means of the magnetic field generating means constituted by division, it is possible to compensate for the decrease of the heat generation distribution due to the non-uniform magnetic field between the divided magnetic field generating means.
【００２９】[0029]
〈実施例１〉（図１〜図３） 図１は本発明に従う電磁誘導方式の加熱装置の一例の構
成を示す摸式図である。<Embodiment 1> (FIGS. 1 to 3) FIG. 1 is a schematic view showing the configuration of an example of an electromagnetic induction heating device according to the present invention.
【００３０】（１）装置の全体的な概略構成 １は横断面上向きの略コ字形のフィルム内面ガイドステ
ーであり、このステー１は液晶ポリマー・フェノール樹
脂等で構成され、内側には磁場発生手段としての、鉄心
（芯材）２に巻き付けて構成した励磁コイル３を収納さ
せてある。(1) Overall schematic configuration of the apparatus 1 is a substantially U-shaped film inner surface guide stay having an upward cross section, and this stay 1 is composed of a liquid crystal polymer, phenol resin or the like, and has a magnetic field generating means inside. As described above, the exciting coil 3 formed by winding the iron core (core material) 2 is housed.
【００３１】このステー１および鉄心２・励磁コイル３
のアセンブリ（電磁誘導加熱構造体）は後述するフィル
ム４・被記録材（被加熱材）Ｐの搬送（移動）方向と交
差（直交）する方向を長手とする横長部材であり、鉄心
２・励磁コイル３は後述するようにその長手方向におい
て分割して構成されている（図２・図３）。This stay 1 and iron core 2 and exciting coil 3
The assembly (electromagnetic induction heating structure) is a laterally long member having a longitudinal direction in a direction intersecting (orthogonal) with a transporting (moving) direction of a film 4 and a recording material (heating material) P described later. The coil 3 is divided and configured in the longitudinal direction as described later (FIGS. 2 and 3).
【００３２】このアセンブリ１・２・３の外側に導電部
材（加熱部材）としてのエンドレス状（円筒状、シーム
レス）の耐熱性フィルム４をルーズに外嵌させてある。An endless (cylindrical, seamless) heat-resistant film 4 as a conductive member (heating member) is loosely fitted on the outside of the assemblies 1, 2, and 3.
【００３３】５は加圧ローラであり、芯金の周囲にシリ
コーンゴム、フッ素ゴム等を被覆して構成される。この
加圧ローラ５は不図示の軸受手段・付勢手段により所定
の押圧力をもってステー１の下面に対してフィルム４を
挟ませて圧接してあり、ステー下面との間にフィルム４
を挟んで圧接ニップ部（定着ニップ部）Ｎを形成する。Reference numeral 5 is a pressure roller, which is formed by coating the core metal with silicone rubber, fluororubber or the like. The pressure roller 5 is in pressure contact with the lower surface of the stay 1 by sandwiching the film 4 against the lower surface of the stay 1 with a predetermined pressing force by bearing means and urging means (not shown).
A pressure contact nip portion (fixing nip portion) N is formed by sandwiching.
【００３４】該加圧ローラ５は駆動手段Ｍにより矢示の
反時計方向に回転駆動される。この加圧ローラ５の回転
駆動による該ローラとフィルム外面との摩擦力でフィル
ム４に回転力が作用して、該フィルム４がステー１の下
面に密着摺動してステー１の外回りを回転する。この場
合ステー１の下面とフィルム４の内面間にはグリース・
オイル等の潤滑剤を塗布することが好ましい。The pressure roller 5 is rotationally driven by the drive means M in the counterclockwise direction indicated by the arrow. A rotational force acts on the film 4 by the frictional force between the pressure roller 5 and the outer surface of the film due to the rotational driving of the pressure roller 5, and the film 4 slides in close contact with the lower surface of the stay 1 to rotate around the stay 1. . In this case, grease should be applied between the lower surface of stay 1 and the inner surface of film 4.
It is preferable to apply a lubricant such as oil.
【００３５】導電部材としてのフィルム４は厚さ１０μ
ｍ〜１００μｍのポリイミド・ポリアミドイミド・ＰＥ
ＥＫ・ＰＥＳ・ＰＰＳ・ＰＥＡ・ＰＴＦＥ・ＦＥＰ等の
耐熱性樹脂をエンドレス状フィルムの基層４ａとし、そ
の基層４ａの外周上（被加熱材圧接面側）に導電層４ｂ
として、鉄やコバルトの層、メッキ処理によって例えば
ニッケル・銅・クロム等の金属層を１μｍ〜１００μｍ
の厚みで形成している。更にその導電層４ｂの自由面に
最外層（表面層）として例えばＰＦＡ・ＰＴＦＥ・ＦＥ
Ｐ・シリコン樹脂等のトナー離型の良好な耐熱性樹脂を
混合ないし独立で被覆して離形層４ｃを形成した、３層
構成のものである。この例ではフィルム基層４ａと導電
層４ｂを別々の層としたがフィルム基層４ａそのものを
導電層としてもよい。The film 4 as a conductive member has a thickness of 10 μm.
m ~ 100μm polyimide / polyamideimide / PE
A heat-resistant resin such as EK / PES / PPS / PEA / PTFE / FEP is used as the base layer 4a of the endless film, and the conductive layer 4b is provided on the outer periphery of the base layer 4a (on the pressure-contact surface side of the material to be heated).
For example, a layer of iron or cobalt, or a metal layer of nickel, copper, chromium, etc., by plating treatment, for example, 1 μm to 100 μm
It is formed with the thickness of. Further, as an outermost layer (surface layer) on the free surface of the conductive layer 4b, for example, PFA / PTFE / FE is used.
This is a three-layer structure in which a release layer 4c is formed by mixing or independently coating a heat-resistant resin having a good toner release property such as P.silicone resin. In this example, the film base layer 4a and the conductive layer 4b are separate layers, but the film base layer 4a itself may be the conductive layer.
【００３６】励磁コイル３に不図示の励磁回路から交番
電流が印加されることでフィルム４の導電層４ｂが電磁
誘導加熱により発熱する。By applying an alternating current to the exciting coil 3 from an exciting circuit (not shown), the conductive layer 4b of the film 4 generates heat by electromagnetic induction heating.
【００３７】６は加圧ローラ５の表面温度を検知する温
度検知素子であるサーミスタで、このサーミスタ６の検
知温度に基づき励磁コイル３へ印加する電流値を制御す
る。加圧ローラ５が冷えていてサーミスタ６の検知温度
が低い時は通電のデューティー比を大きく、検知温度が
高い時は通電のデューティー比を小さくする。このサー
ミスタ６はステー１のフィルム非摺動面や鉄心２上に設
けることも可能である。Reference numeral 6 is a thermistor which is a temperature detecting element for detecting the surface temperature of the pressure roller 5, and controls the current value applied to the exciting coil 3 based on the temperature detected by the thermistor 6. When the pressure roller 5 is cold and the temperature detected by the thermistor 6 is low, the duty ratio for energization is increased, and when the detected temperature is high, the duty ratio for energization is decreased. The thermistor 6 can be provided on the film non-sliding surface of the stay 1 or on the iron core 2.
【００３８】７は過昇温時に励磁コイル３への通電を遮
断する温度ヒューズ、サーモスイッチ等の安全素子であ
る。Reference numeral 7 is a safety element such as a temperature fuse or a thermoswitch that cuts off energization to the exciting coil 3 when the temperature rises excessively.
【００３９】而して、加圧ローラ５の回転によるフィル
ム４の回転がなされ、励磁回路から励磁コイル３への電
流印加がなされてフィルム４の導電層４ｂが発熱した状
態において、圧接ニップ部Ｎに被加熱体としての被記録
材Ｐが導入されてフィルム４面に密着して該フィルムと
一緒に圧接ニップ部Ｎを通過することで、電磁誘導加熱
されたフィルム４の熱が被記録材Ｐに付与された未定着
トナー像Ｔが加熱定着Ｔ′される。圧接ニップ部Ｎを通
った被記録材Ｐはフィルム４の面から分離されて搬送さ
れる。Thus, when the film 4 is rotated by the rotation of the pressure roller 5 and a current is applied from the exciting circuit to the exciting coil 3 to heat the conductive layer 4b of the film 4, the pressure contact nip portion N is formed. The recording material P as a material to be heated is introduced into the surface of the recording material P, and the recording material P comes into close contact with the surface of the film 4 and passes through the pressure contact nip portion N together with the film. The unfixed toner image T applied to the toner is heat-fixed T ′. The recording material P passing through the pressure nip portion N is separated from the surface of the film 4 and conveyed.
【００４０】（２）加熱原理 励磁コイル３には励磁回路から交流電流が印加され、こ
れによってコイル３の周囲に矢印Ｈで示した磁束が生成
消滅をくり返す。この磁束Ｈがフィルム４の導電層４ｂ
を横切るように鉄心２は構成される。(2) Heating principle An alternating current is applied to the exciting coil 3 from the exciting circuit, whereby the magnetic flux indicated by the arrow H is repeatedly generated and extinguished around the coil 3. This magnetic flux H is generated by the conductive layer 4b of the film 4.
The iron core 2 is configured so as to traverse.
【００４１】変動する磁界が導体中を横切るとき、その
磁界の変化を妨げる磁界を生じるように導体中には渦電
流が発生する。この渦電流を矢印Ａで示す。When a fluctuating magnetic field traverses in a conductor, eddy currents are generated in the conductor so as to create a magnetic field that impedes changes in the magnetic field. This eddy current is indicated by arrow A.
【００４２】この渦電流は表皮効果のためにほとんど導
電層４ｂのコイル３側の面に集中して流れ、フィルム導
電層４ｂの表皮抵抗ＲS に比例した電力で発熱を生じ
る。Due to the skin effect, this eddy current mostly flows concentratedly on the surface of the conductive layer 4b on the coil 3 side, and heat is generated by electric power proportional to the skin resistance R S of the film conductive layer 4b.
【００４３】ＲS は、角周波数ω、透磁率μ、固有抵抗
ρから得られる表皮深さR S is the skin depth obtained from the angular frequency ω, the magnetic permeability μ, and the specific resistance ρ.
【００４４】[0044]
【外１】 と表せる。[Outside 1] Can be expressed as
【００４５】従って、ＲS を大きくするか、Ｉf を大き
くすれば、電力を増すことができ、発熱量を増すことが
可能となる。Therefore, the power can be increased and the amount of heat generation can be increased by increasing R S or increasing I f .
【００４６】ＲS を大きくするには周波数ωを高くする
か、透磁率μの高い材料、固有抵抗ρの高いものを使え
ば良い。To increase R S , the frequency ω may be increased, or a material having a high magnetic permeability μ and a material having a high specific resistance ρ may be used.
【００４７】これからすると、非磁性金属を導電層４ｂ
に用いると加熱しずらいことが推測されるが、導電層４
ｂの厚さｔが表皮深さδより薄い場合には、 ＲS ≒ρ／ｔ となるので加熱可能となる。From now on, the non-magnetic metal is added to the conductive layer 4b.
It is presumed that it is difficult to heat when used for the conductive layer 4
When the thickness t of b is smaller than the skin depth δ, R S ≈ρ / t, and thus heating is possible.
【００４８】励磁コイル３に印加する交流電流の周波数
は１０〜５００ｋＨｚが好ましい。The frequency of the alternating current applied to the exciting coil 3 is preferably 10 to 500 kHz.
【００４９】１０ｋＨｚ以上になると、導電層４ｂへの
吸収効率が良くなり、５００ｋＨｚ迄は安価な素子を用
いて励磁回路を組むことができる。When the frequency is 10 kHz or more, the absorption efficiency into the conductive layer 4b is improved, and up to 500 kHz, an exciting circuit can be assembled by using an inexpensive element.
【００５０】更には２０ｋＨｚ以上であれば可聴域をこ
えるため通電時に音がすることがなく、２００ｋＨｚ以
下では励磁回路で生じるロスも少なく、周辺への放射ノ
イズも小さい。Further, if the frequency is 20 kHz or more, the sound exceeds the audible range and no noise is generated when energized, and if it is 200 kHz or less, the loss generated in the exciting circuit is small and the radiation noise to the surroundings is small.
【００５１】また１０〜５００ｋＨｚの交流電流を導電
層４ｂに印加した場合、表皮深さは数μｍから数百μｍ
程度である。When an alternating current of 10 to 500 kHz is applied to the conductive layer 4b, the skin depth is several μm to several hundreds μm.
It is a degree.
【００５２】実際に導電層４ｂの厚みを１μｍより小さ
くすると、ほとんどの電磁エネルギーが導電層４ｂで吸
収しきれないためエネルギー効率が悪くなる。When the thickness of the conductive layer 4b is actually smaller than 1 μm, most of the electromagnetic energy cannot be absorbed by the conductive layer 4b, resulting in poor energy efficiency.
【００５３】また、もれた磁界が他の金属部を加熱する
という問題も生じる。There is also a problem that the leaked magnetic field heats other metal parts.
【００５４】一方で１００μを越えた導電層４ｂではフ
ィルム４の剛性が高くなりすぎることと、導電層４ｂ中
の熱伝導によって熱が伝わり、離形層４ｃが暖まりにく
くなるという問題が生じる。On the other hand, in the conductive layer 4b having a thickness of more than 100 μ, the rigidity of the film 4 becomes too high, and heat is transferred by the heat conduction in the conductive layer 4b, so that the releasing layer 4c becomes difficult to warm up.
【００５５】従って導電層４ｂの厚みは１〜１００μｍ
が好ましい。Therefore, the thickness of the conductive layer 4b is 1 to 100 μm.
Is preferred.
【００５６】また導電層４ｂの発熱を増すためにはＩf
を大きくすれば良く、そのためにはコイル３によって生
成される磁束を強くする、あるいは磁束の変化を大きく
すれば良い。この方法としてコイル３の巻き線数を増す
か、コイル３の鉄心２をフェライト、パーマロイといっ
た高透磁率で残留磁束密度の低いものを用いると良い。To increase the heat generation of the conductive layer 4b, I f
Is increased, and for that purpose, the magnetic flux generated by the coil 3 may be strengthened or the change of the magnetic flux may be increased. As this method, the number of windings of the coil 3 may be increased, or the iron core 2 of the coil 3 may be made of ferrite or permalloy having a high magnetic permeability and a low residual magnetic flux density.
【００５７】フィルム４の導電層４ｂの抵抗値が小さす
ぎると、渦電流が発生した際の発熱効率が悪化するた
め、導電層４ｂの固有体積低効率は２０℃環境下で１．
５×１０-8Ωｍ以上が好ましい。If the resistance value of the conductive layer 4b of the film 4 is too small, the heat generation efficiency when an eddy current is generated deteriorates. Therefore, the specific volume low efficiency of the conductive layer 4b is 1.
It is preferably 5 × 10 −8 Ωm or more.
【００５８】本実施例ではフィルム４の導電層４ｂをメ
ッキ処理によって形成したが、真空蒸着・スパッタリン
グ等で形成しても良い。これによりメッキ処理できない
アルミニウムや金属酸化物合金を導電層４ｂに用いるこ
とができる。但し、メッキ処理が膜厚を得られ易いため
１〜１００μｍの層厚を得るためにはメッキ処理が好ま
しい。In this embodiment, the conductive layer 4b of the film 4 is formed by plating, but it may be formed by vacuum evaporation, sputtering or the like. As a result, aluminum or metal oxide alloy that cannot be plated can be used for the conductive layer 4b. However, it is preferable to perform the plating treatment in order to obtain a layer thickness of 1 to 100 μm because the plating treatment can easily obtain the film thickness.
【００５９】例えば高透過率の鉄、コバルト、ニッケル
等の強磁性体を付けると、励磁コイル３によって生成さ
れる電磁エネルギーを吸収し易く、効率よく加熱できか
つ、機外へもれる磁気も少なくなり、周辺装置への影響
も減らせる。また、これらのもので高低効率のものを選
ぶともっと良い。For example, when a ferromagnetic material such as iron, cobalt, nickel or the like having a high transmittance is attached, the electromagnetic energy generated by the exciting coil 3 can be easily absorbed, the heating can be efficiently performed, and the magnetism leaked out of the machine is small. It also reduces the impact on peripheral devices. Moreover, it is better to select one of these with high and low efficiency.
【００６０】また、フィルム４の導電層４ｂは金属のみ
ならず、低熱伝導電性基材に表面離形層を接着するため
の接着剤中に導電性、高透磁率な粒子、ウィスカーを分
散させて導電層としても良い。The conductive layer 4b of the film 4 is made of not only metal but also conductive and high magnetic permeability particles and whiskers dispersed in an adhesive for bonding the surface release layer to the low thermal conductive base material. It may be used as a conductive layer.
【００６１】例えば、マンガン、チタン、クロム、鉄、
銅、コバルト、ニッケル等の粒子やこれらの合金である
フェライトや酸化物の粒子やウィスカーといったものを
カーボン等の導電性粒子と混合し、接着剤中に分散させ
て導電層とすることができる。For example, manganese, titanium, chromium, iron,
Particles of copper, cobalt, nickel or the like, particles of these alloys such as ferrite or oxide, or whiskers can be mixed with conductive particles such as carbon and dispersed in an adhesive to form a conductive layer.
【００６２】以上説明したように、フィルム４の表層近
くを直接発熱させるので、フィルム基材（基層）４ａの
熱伝導率、熱容量によらず、急速に加熱できる利点があ
る。As described above, since heat is directly generated near the surface layer of the film 4, there is an advantage that heating can be performed rapidly regardless of the thermal conductivity and heat capacity of the film base material (base layer) 4a.
【００６３】またフィルム４の厚さにも依存しないため
に、高速化のためにフィルム４の剛性を向上するためフ
ィルム４の基材４ａを厚くしても迅速に定着温度にまで
加熱できる。Further, since it does not depend on the thickness of the film 4, in order to improve the rigidity of the film 4 for speeding up, even if the base material 4a of the film 4 is thickened, it can be quickly heated to the fixing temperature.
【００６４】更にはフィルム基材４ａは低熱伝導性の樹
脂のため断熱性が良く、フィルム内側にあるコイル等の
熱容量の大きなものとは断熱ができるので連続プリント
を行なっても熱のロスが少なく、エネルギー効率が良
い。かつフィルム内のコイル３に熱が伝わらずコイルと
しての性能低下も生じない。Further, since the film base material 4a is a resin having a low thermal conductivity, it has a good heat insulating property, and it can be insulated from a coil having a large heat capacity such as a coil inside the film, so that heat loss is small even if continuous printing is performed. , Energy efficient. Moreover, heat is not transmitted to the coil 3 in the film, and the performance of the coil does not deteriorate.
【００６５】そして熱効率が向上した分、装置内の昇温
も抑えられて、該加熱装置を画像加熱定着装置として用
いた電子写真装置等の画像形成装置の像形成部への影響
も少なくできる。Since the thermal efficiency is improved, the temperature rise in the apparatus can be suppressed and the influence on the image forming portion of the image forming apparatus such as an electrophotographic apparatus using the heating apparatus as an image heating and fixing apparatus can be reduced.
【００６６】（３）磁場発生手段２・３の分割構成（図
２・図３） 本実施例では磁場発生手段としての励磁鉄心２・コイル
３を図２・図３に示すようにその長手方向、即ちフィル
ム４・被記録材（被加熱材）Ｐの搬送方向と交差（直
交）する方向において第１〜第３の３つの励磁コイルユ
ニット２ａ・３ａ、２ｂ・３ｂ、２ｃ・３ｃに分割して
構成してある。Ｏ−Ｏは被記録材Ｐの片側通紙基準線で
ある。Ｐ１・Ｐ２・Ｐ３は大・中・小３種のサイズ幅の
被記録材にそれぞれ対応する、片側通紙基準線Ｏ−Ｏを
基準とする各通紙幅領域であり、Ｐ１＞Ｐ２＞Ｐ３の関
係にある。(3) Divided configuration of the magnetic field generating means 2 and 3 (FIGS. 2 and 3) In this embodiment, the exciting iron core 2 and the coil 3 as the magnetic field generating means are arranged in the longitudinal direction thereof as shown in FIGS. That is, in the direction intersecting (orthogonal) with the transport direction of the film 4 and the recording material (heating material) P, the first to third exciting coil units 2a, 3a, 2b, 3b, 2c, 3c are divided. Configured. OO is a one-sided sheet passing reference line of the recording material P. P1, P2, and P3 are the paper passing width areas based on the one-sided paper passing reference line OO, which correspond to recording materials having three types of large, medium, and small size widths, respectively, and P1>P2> P3. Have a relationship.
【００６７】第１〜第３の３つの分割励磁コイルユニッ
ト２ａ・３ａ、２ｂ・３ｂ、２ｃ・３ｃの総長が大サイ
ズ通紙幅領域（最大通紙幅）Ｐ１にほぼ相当し、第１と
第２の２つの分割励磁コイルユニット２ａ・３ａ、２ｂ
・３ｂの総長が中サイズ通紙幅領域Ｐ２にほぼ相当し、
第１の分割励磁コイルユニット２ａ・３ａの長さが小サ
イズ通紙幅領域Ｐ３にほぼ相当している。The total length of the first to third three divided excitation coil units 2a, 3a, 2b, 3b, 2c, 3c substantially corresponds to the large size sheet passing width area (maximum sheet passing width) P1, and the first and second 2 divided excitation coil units 2a, 3a, 2b
-The total length of 3b is almost equivalent to the medium size paper width area P2,
The length of the first divided excitation coil units 2a and 3a substantially corresponds to the small-size sheet passing width region P3.
【００６８】第１〜第３の分割励磁コイルユニット２ａ
・３ａ、２ｂ・３ｂ、２ｃ・３ｃの各コイル３ａ・３ｂ
・３ｃに対する通電は通紙される被記録材の幅サイズに
応じて独立に選択的になされる。First to third divided excitation coil units 2a
.3a, 2b, 3b, 2c, 3c coils 3a, 3b
Energization of 3c is selectively performed independently according to the width size of the recording material to be passed.
【００６９】即ち、大サイズの被記録材が通紙されたと
きはサーミスタ６の検知温度に従って通紙幅領域Ｐ１に
対応する第１〜第３の３つの分割励磁コイルユニット２
ａ・３ａ、２ｂ・３ｂ、２ｃ・３ｃの各コイル３ａ・３
ｂ・３ｃに通電されることで、フィルム４の導電層４ｂ
が大サイズ通紙幅領域Ｐ１において発熱して、大サイズ
の被記録材の加熱処理がなされる。That is, when a large-sized recording material is passed, the first to third three divided excitation coil units 2 corresponding to the sheet passing width region P1 according to the temperature detected by the thermistor 6.
a. 3a, 2b, 3b, 2c, 3c coils 3a. 3
The conductive layer 4b of the film 4 is supplied by energizing b3c.
Generates heat in the large-size sheet passing width region P1, and the large-sized recording material is heat-treated.
【００７０】中サイズの被記録材が通紙されたときはサ
ーミスタ６の検知温度に従って通紙幅領域Ｐ２に対応す
る第１・第２の２つの励磁コイルユニット２ａ・３ａ、
２ｂ・３ｂの各コイル３ａ・３ｂに通電されることで、
フィルム４の導電層４ｂが中サイズ通紙幅領域Ｐ２にお
いて発熱して、中サイズの被記録材の加熱処理がなされ
る。When a medium-sized recording material is passed, the first and second two exciting coil units 2a and 3a corresponding to the sheet passing width region P2 according to the temperature detected by the thermistor 6,
By energizing the coils 3a and 3b of 2b and 3b,
The conductive layer 4b of the film 4 generates heat in the medium-size sheet passing width region P2, and the medium-size recording material is heat-treated.
【００７１】このとき非通紙部領域に対応する第３の分
割励磁コイルユニット２ｃ・３ｃのコイル３ｃについて
は非通紙部領域のフィルム導電層部分が発熱しないよう
に電流値制御（通電遮断もしくは通電量減少制御）され
る。At this time, with respect to the coils 3c of the third divided excitation coil units 2c and 3c corresponding to the non-sheet passing portion area, current value control (energization interruption or cut-off of current supply) is performed so that the film conductive layer portion in the non-sheet passing portion area does not generate heat. The energization amount reduction control) is performed.
【００７２】小サイズの被記録材が通紙されたときはそ
の通紙幅領域Ｐ３に対応する第１の分割励磁コイルユニ
ット２ａ・３ａのコイル３ａにサーミスタ６の検知温度
に従って通電されることで、フィルム４の導電層４ｂが
小サイズ通紙幅領域Ｐ３において発熱して小サイズの被
記録材の加熱処理がなされる。When a small-sized recording material is passed, the coils 3a of the first divided excitation coil units 2a and 3a corresponding to the passing width region P3 are energized according to the temperature detected by the thermistor 6, The conductive layer 4b of the film 4 generates heat in the small-size sheet passing width region P3, and the small-sized recording material is heat-treated.
【００７３】このとき非通紙部領域に対応する第２と第
３の２つの分割励磁コイルユニット２ｂ・３ｂ、２ｃ・
３ｃのコイル３ｂ・３ｃについては非通紙部領域のフィ
ルム導電層部分が発熱しないように電流値制御される。At this time, the second and third divided exciting coil units 2b, 3b, 2c.
Regarding the coils 3b and 3c of 3c, the current value is controlled so that the film conductive layer portion in the non-sheet passing portion area does not generate heat.
【００７４】これにより中サイズや小サイズの被記録材
の通紙の場合の非通紙部過昇温現象を防止することがで
きる。As a result, it is possible to prevent the excessive temperature rise phenomenon of the non-sheet-passing portion in the case of passing a medium-sized or small-sized recording material.
【００７５】磁場発生手段としての励磁鉄心・コイル
が、本発明のように通紙サイズに応じて分割された励磁
コイルユニットから構成されずに、長手方向にわたって
一体の励磁コイルからなる場合においては非通紙部にお
ける温度が被加熱材としての被記録材Ｐによる排熱効果
がないために通紙部の温度に比較して１００〜２００度
高くなり、一体の励磁芯材内の熱伝導によって非通紙部
領域ばかりでなく通紙部領域の励磁芯材まで過昇温し、
そのために芯材内の自発磁化が減少した芯材から発生す
る磁束が減少する。したがってフィルム４の導電層４ｂ
に誘導される渦電流が減少し、発熱量が減少する。結果
として通紙部領域の反通紙基準側で定着不良を発生す
る。更には励磁芯材２の発生磁界減少分を通電の増加で
補うために極めてエネルギー効率を低下させてしまう。When the exciting core / coil as the magnetic field generating means is not composed of exciting coil units divided according to the sheet size as in the present invention but is formed of an integral exciting coil in the longitudinal direction, the Since the temperature of the paper passing portion is 100 to 200 degrees higher than the temperature of the paper passing portion because there is no heat exhausting effect of the recording material P as the heated material, heat is not transferred due to heat conduction in the integrated excitation core material. Excessive temperature rise not only to the paper passing area but also to the excitation core material in the paper passing area,
Therefore, the magnetic flux generated from the core material in which the spontaneous magnetization in the core material is reduced is reduced. Therefore, the conductive layer 4b of the film 4
The eddy current that is induced in the coil decreases, and the amount of heat generated decreases. As a result, fixing failure occurs on the non-passing reference side of the sheet passing area. Furthermore, since the decrease in the magnetic field generated by the exciting core material 2 is compensated for by the increase in energization, the energy efficiency is extremely reduced.
【００７６】これに対して本発明による分割励磁コイル
ユニットの通紙サイズに応じた独立通電制御は非通紙部
過昇温による影響を通紙部領域に与えることなく、高い
エネルギー変換効率で安定した均一な発熱を達成でき
る。On the other hand, the independent energization control according to the sheet passing size of the divided excitation coil unit according to the present invention does not affect the sheet passing area due to the excessive temperature rise of the non-sheet passing section and stabilizes with high energy conversion efficiency. It is possible to achieve uniform heat generation.
【００７７】〈実施例２〉（図４） 図４は図２・図３ので示した第１〜第３の分割励磁コイ
ルユニット２ａ・３ａ、２ｂ・３ｂ、２ｃ・３ｃ相互の
境界部における発熱分布の更なる一様化を図るために各
励磁コイルユニット間に第１と第２の補助励磁コイルユ
ニット２ｄ・３ｄ、２ｅ・３ｅを千鳥格子状に配置した
ものである。<Embodiment 2> (FIG. 4) FIG. 4 shows heat generation at the boundary between the first to third split excitation coil units 2a, 3a, 2b, 3b, 2c, 3c shown in FIG. 2 and FIG. In order to further homogenize the distribution, the first and second auxiliary exciting coil units 2d, 3d, 2e, 3e are arranged in a zigzag pattern between the exciting coil units.
【００７８】第１と第２の補助励磁コイルユニット２ｄ
・３ｄ、２ｅ・３ｅはそれぞれ第１と第２の分割励磁コ
イルユニット２ａ・３ａ、２ｂ・３ｂの励磁コイル３ａ
・３ｂに通電する場合にも通電することによって励磁コ
イル３ａと３ｂ間の不均一磁界による発熱分布の下降分
を補償するものであり、第２と第３の分割励磁コイルユ
ニット２ｂ・３ｂ、２ｃ・３ｃの励磁コイル励磁コイル
３ｂと３ｃに通電する場合には第２の補助励磁コイルユ
ニット２ｅ・３ｅの励磁コイル３ｅに通電し、同様な励
磁コイル間の不均一磁界を補償してやるものである。First and second auxiliary excitation coil units 2d
3d, 2e, and 3e are the exciting coils 3a of the first and second divided exciting coil units 2a, 3a, 2b, and 3b, respectively.
When the 3b is energized, the energization is performed to compensate for the decrease in the heat generation distribution due to the non-uniform magnetic field between the exciting coils 3a and 3b. The second and third split exciting coil units 2b, 3b, 2c 3c Excitation coil When energizing the excitation coils 3b and 3c, the excitation coil 3e of the second auxiliary excitation coil units 2e and 3e is energized to compensate for a similar non-uniform magnetic field between the excitation coils.
【００７９】〈実施例３〉（図５・図６） 本実施例は減磁コイルユニットを併設して非通紙部領域
に相当する励磁コイルユニットの発生磁界を減磁させて
非通紙部過昇温を防止するようにしたものである。<Embodiment 3> (FIGS. 5 and 6) In this embodiment, a demagnetizing coil unit is provided side by side to demagnetize the magnetic field generated by the exciting coil unit corresponding to the non-sheet passing portion area, thereby deactivating the non-sheet passing portion. This is to prevent excessive temperature rise.
【００８０】即ち図５のものは、磁場発生手段としての
励磁鉄心・コイルを第１と第２の２つの励磁コイルユニ
ット２ａ・３ａ、２ｂ・３ｂに分割して構成してあり、
第２の分割励磁コイルユニット２ｂ・３ｂの上に減磁コ
イルユニット２ｆ・３ｆを配設したものである。That is, the one shown in FIG. 5 is constructed by dividing an exciting iron core / coil as magnetic field generating means into two first and second exciting coil units 2a, 3a, 2b and 3b,
The demagnetization coil units 2f and 3f are arranged on the second split excitation coil units 2b and 3b.
【００８１】大サイズの被記録材が通紙されたときはサ
ーミスタ６の検知温度に従って大サイズ通紙幅領域Ｐ１
に対応する第１と第２の２つの分割励磁コイルユニット
２ａ・３ａ、２ｂ・３ｂの各コイル３ａ・３ｂに通電さ
れることで、フィルム４の導電層ｂが大サイズ通紙幅領
域Ｐ１において発熱して、大サイズの被記録材の加熱処
理がなされる。When a large-sized recording material is passed, the large-sized sheet passing width region P1 is detected according to the temperature detected by the thermistor 6.
When the coils 3a and 3b of the first and second divided excitation coil units 2a, 3a, 2b and 3b corresponding to the above are energized, the conductive layer b of the film 4 generates heat in the large size sheet passing width region P1. Then, the large-sized recording material is heat-treated.
【００８２】それよりも小さいサイズの被記録材が通紙
されたときはその通紙幅領域Ｐ２に対応する第１の分割
励磁コイルユニット２ａ・３ａのコイル３ａにサーミス
タ６の検知温度に従って通電されることで、フィルム４
の導電層４ｂが小サイズ通紙幅領域Ｐ２において発熱し
て小サイズの被記録材の加熱処理がなされる。When a recording material of a size smaller than that is passed, the coils 3a of the first divided excitation coil units 2a and 3a corresponding to the sheet passing width region P2 are energized according to the temperature detected by the thermistor 6. By that, film 4
The conductive layer 4b generates heat in the small-size sheet passing width region P2, and the small-sized recording material is heat-treated.
【００８３】このとき非通紙部領域に対応する第２の分
割励磁コイルユニット２ｂ・３ｂの励磁コイルにも通電
がなされるが、その上に対応させた減磁コイルユニット
２ｆ・３ｆのコイル３ｆに対する通電によってその下に
ある第２の分割励磁コイルユニット２ｂ・３ｂの形成す
る発生磁界を減磁するものであり、例えば励磁コイル３
ｂのコイル巻き方向と逆向きに減磁コイルユニット２ｆ
・３ｆのコイル３ｆが形成される構成や励磁コイルへの
通電交流波形の位相をずらすことによって達成可能であ
る。このような構成においてもフィルム４の導電層４ｂ
内の磁界が減少するため、その発熱を部分的に抑制する
ことが可能である。At this time, the exciting coils of the second divided exciting coil units 2b and 3b corresponding to the non-sheet passing area are also energized, but the coils 3f of the corresponding demagnetizing coil units 2f and 3f are also energized. Is to demagnetize the magnetic field generated by the second divided excitation coil units 2b and 3b located below the excitation coil 3 by, for example, the excitation coil 3.
demagnetization coil unit 2f in the direction opposite to the coil winding direction of b
This can be achieved by forming the 3f coil 3f or by shifting the phase of the alternating current waveform applied to the exciting coil. Even in such a configuration, the conductive layer 4b of the film 4
Since the internal magnetic field is reduced, it is possible to partially suppress the heat generation.
【００８４】図６に示すように最大通紙サイズの１つの
励磁コイルユニット２・３の非通紙領域に減磁コイル３
ｇを配設することによっても同様の効果を達成できる。As shown in FIG. 6, the demagnetizing coil 3 is provided in the non-sheet passing area of one exciting coil unit 2/3 having the maximum sheet passing size.
The same effect can be achieved by disposing g.
【００８５】〈実施例４〉（図７） 本実施例においては、磁場発生手段と導電部材は上下に
向かい合わせて対向もしくは接触させて配設した、線輪
としての界磁コイルプレート８と、誘導磁性材としての
磁性金属材９からなる電磁誘導加熱構造体（ヒータ）で
ある。この電磁誘導加熱構造体８・９を磁性金属材９を
下向きに露呈させて、熱硬化性樹脂等より形成された剛
性・耐熱性を有する横断面略半円樋型のフィルム内面ガ
イドステー１の下面の略中央部にガイド長手に沿って嵌
め込み的に取り付け保持させてある。<Embodiment 4> (FIG. 7) In the present embodiment, the magnetic field generating means and the conductive member are vertically opposed to each other and face each other or are in contact with each other. It is an electromagnetic induction heating structure (heater) made of a magnetic metal material 9 as an induction magnetic material. By exposing the electromagnetic induction heating structures 8 and 9 with the magnetic metal material 9 facing downward, a film inner surface guide stay 1 having a substantially semicircular cross section having rigidity and heat resistance formed of a thermosetting resin or the like is provided. It is fitted and held along the length of the guide in a substantially central portion of the lower surface.
【００８６】１０はエンドレスの耐熱性フィルムであ
り、上記の電磁誘導加熱構造体８・９を含むフィルム内
面ガイドステー１にルーズに外嵌させてあり、該フィル
ム１０を加圧ローラ５により電磁誘導加熱構造体８・９
の磁性金属材９の下面に圧接させてある。フィルム１０
には導電層は具備させていない。Reference numeral 10 denotes an endless heat-resistant film, which is loosely fitted onto the film inner surface guide stay 1 including the electromagnetic induction heating structures 8 and 9, and the film 10 is electromagnetically induced by the pressure roller 5. Heating structure 8 ・ 9
It is pressed against the lower surface of the magnetic metal material 9. Film 10
Does not have a conductive layer.
【００８７】加圧ローラ５は駆動手段Ｍにより矢示の反
時計方向に回転駆動され、該加圧ローラ５の回転駆動に
よる該ローラとフィルム外面との摩擦力でフィルム１０
に回転力が作用して、該フィルム１０が磁性金属材９の
下面に密着して摺動回転する。The pressure roller 5 is rotationally driven in the counterclockwise direction indicated by the arrow by the driving means M, and the film 10 is rubbed by the rotational force of the pressure roller 5 between the roller and the outer surface of the film.
The rotational force acts on the film 10, and the film 10 is brought into close contact with the lower surface of the magnetic metal material 9 to slide and rotate.
【００８８】界磁コイルプレート８の磁界コイルからの
発生高周波磁界を磁性金属材９に磁気結合させ、磁気が
及ぼす渦電流損によって磁性金属材９を加熱し、該磁性
金属材９の発熱により該磁性金属材９に密着移動する耐
熱性フィルム１０が加熱される。The high frequency magnetic field generated from the magnetic field coil of the field coil plate 8 is magnetically coupled to the magnetic metal material 9, and the magnetic metal material 9 is heated by the eddy current loss caused by magnetism. The heat resistant film 10 that closely moves to the magnetic metal material 9 is heated.
【００８９】而して、フィルム１０を挟んで磁性金属材
９と加圧ローラ５とで形成される圧接ニップ部Ｎのフィ
ルム１０と加圧ローラ５との間に被加熱材としての画像
定着すべき被記録材Ｐが不図示の画像形成部より導入さ
れてフィルム１０と一緒に圧接ニップ部Ｎを挟持搬送さ
れることにより磁性金属材９の熱がフィルム１０を介し
て被記録材Ｐに付与され被記録材Ｐ上の未定着トナー像
Ｔが被記録材Ｐ面に加熱定着されるものである。圧接ニ
ップ部Ｎを通った被記録材Ｐはフィルム１０の面から分
離されて搬送される。Thus, an image as a material to be heated is fixed between the pressure roller 5 and the film 10 in the pressure contact nip portion N formed by the magnetic metal material 9 and the pressure roller 5 with the film 10 interposed therebetween. The recording material P to be recorded is introduced from an image forming unit (not shown) and is nipped and conveyed together with the film 10 in the pressure contact nip portion N, so that the heat of the magnetic metal material 9 is applied to the recording material P via the film 10. Then, the unfixed toner image T on the recording material P is heated and fixed on the surface of the recording material P. The recording material P passing through the pressure nip portion N is separated from the surface of the film 10 and conveyed.
【００９０】本例のような装置においても、電磁誘導加
熱構造体８・９をその長手方向において分割した構成と
することにより、実施例１のものと同様に非通紙部過昇
温現象をなくすことができる。Also in the apparatus of this example, the electromagnetic induction heating structures 8 and 9 are divided in the longitudinal direction thereof, so that the excessive temperature rise phenomenon of the non-sheet passing portion can be prevented as in the first embodiment. It can be lost.
【００９１】〈実施例５〉（図８） 図８の（ａ）・（ｂ）・（ｃ）はそれぞれ電磁誘導加熱
方式の加熱装置の他の構成形態例を示したものである。<Embodiment 5> (FIG. 8) FIGS. 8A, 8B, and 8C show another example of the configuration of the electromagnetic induction heating type heating device.
【００９２】（ａ）のものは電磁誘導加熱構造体１・２
・３のステー１の下面と、駆動ローラ１１と、従動ロー
ラ（テンションローラ）１２との、３部材間にエンドレ
スベルト状の導電部材としてのフィルム４を懸回張設し
て駆動ローラ１１によりフィルム４を回転駆動する構成
のものである。１３はフィルム４を挟んでステー下面に
圧接させた加圧ローラであり、フィルム４の回転移動に
伴ない従動回転する。(A) is an electromagnetic induction heating structure 1.2.
A film 4 serving as an endless belt-shaped conductive member is suspended and stretched between the three members of the lower surface of the stay 1 of 3, the driving roller 11, and the driven roller (tension roller) 12, and the film is driven by the driving roller 11. 4 is rotationally driven. Reference numeral 13 denotes a pressure roller that is pressed against the lower surface of the stay with the film 4 interposed therebetween, and is driven to rotate as the film 4 rotates.
【００９３】（ｂ）のものは、電磁誘導加熱構造体１・
２・３のステー１の下面と駆動ローラ１１の２部材間に
エンドレスベルト状の導電部材としてのフィルム４を懸
回張設して駆動ローラ１１により回転駆動する構成のも
のである。In (b), the electromagnetic induction heating structure 1
A film 4 as an endless belt-shaped conductive member is suspended and stretched between the lower surface of the 2.3 stay 1 and two members of the drive roller 11 and is rotationally driven by the drive roller 11.
【００９４】（ｃ）のものは、導電部材としてのフィル
ム４として、エンドレスベルト状のものではなく、ロー
ル巻きにした長尺の有端フィルムを用い、これを繰り出
し軸１４側から電磁誘導加熱構造体１・２・３のステー
下面を経由させて巻き取り軸１５側へ所定の速度で走行
させるように構成したものである。In the case of (c), as the film 4 as the conductive member, a long end film wound in a roll is used instead of the endless belt-like film, and this is wound from the feeding shaft 14 side to the electromagnetic induction heating structure. The body 1, 2, 3 is configured to run at a predetermined speed to the winding shaft 15 side via the stay lower surface.
【００９５】〈実施例６〉（図９） 本実施例は前述実施例１の電磁誘導加熱方式の加熱装置
を画像加熱定着装置３１として用いた画像形成装置の一
例の概略構成図である。本例の画像形成装置は電子写真
プロセス利用のレーザービームプリンタである。<Embodiment 6> (FIG. 9) This embodiment is a schematic configuration diagram of an example of an image forming apparatus in which the heating device of the electromagnetic induction heating system of Embodiment 1 is used as the image heating and fixing device 31. The image forming apparatus of this example is a laser beam printer using an electrophotographic process.
【００９６】２１は像担持体としての回転ドラム型の電
子写真感光体（以下、ドラムと記す）であり、矢示の時
計方向に所定の周速度（プロセススピード）をもって回
転駆動される。Reference numeral 21 denotes a rotary drum type electrophotographic photosensitive member (hereinafter referred to as a drum) as an image bearing member, which is rotationally driven in the clockwise direction indicated by an arrow at a predetermined peripheral speed (process speed).
【００９７】ドラム２１は、その回転過程で一次帯電器
２２により所定の極性・電位に一様に一次帯電処理を受
け、その帯電処理面に対してレーザースキャナー２３に
より目的の画像情報に対応したレーザービーム走査露光
Ｌがなされることで、その周面に目的の画像情報に対応
した静電潜像の形成を受ける。The drum 21 is uniformly charged with a predetermined polarity and potential by the primary charger 22 during its rotation process, and the charged surface of the drum 21 is laser-scanned by the laser scanner 23 in accordance with the desired image information. By performing the beam scanning exposure L, an electrostatic latent image corresponding to the target image information is formed on the peripheral surface thereof.
【００９８】その形成静電潜像は現像器２４によりトナ
ーＴで反転現像処理されて顕像化され、そのトナー像形
成面が転写部としての、ドラム２１と転写ローラ２５と
の圧接ニップ部へ移行していく。The formed electrostatic latent image is subjected to reversal development processing with the toner T by the developing device 24 to be visualized, and the toner image forming surface is transferred to the pressure contact nip portion between the drum 21 and the transfer roller 25. It will shift.
【００９９】２７は被記録材としての転写材シートＰを
積載収納したカセットであり、該カセット２７内のシー
トＰが給送ローラ２８の回転により１枚宛繰出し給送さ
れ、次いでレジストローラ２９により、ドラム２１上の
トナー画像形成部の先端が転写部に到達したとき転写材
シートＰの先端も転写部に丁度到達して両者一致するよ
うにタイミングどりされて同期給送される。Reference numeral 27 denotes a cassette in which transfer material sheets P as recording materials are stacked and accommodated. The sheets P in the cassette 27 are fed out one by one by the rotation of a feeding roller 28, and then by a registration roller 29. When the leading edge of the toner image forming portion on the drum 21 reaches the transfer portion, the leading edge of the transfer material sheet P also reaches the transfer portion and is fed in a timed manner so that they coincide with each other.
【０１００】そしてその給送シートの面に対して転写ロ
ーラ２５によりドラム２１側のトナー画像が順次に転写
されていく。Then, the toner images on the drum 21 side are sequentially transferred to the surface of the fed sheet by the transfer roller 25.
【０１０１】転写部でトナー画像転写を受けたシートは
不図示の分離手段でドラム２１面から順次に分離されて
搬送ガイド装置３０によって前述の定着装置３１に導か
れて担持している未定着トナー画像Ｔの加熱定着を受
け、画像形成物（コピー）としてガイド３２・排出ロー
ラ３３を通って機外の排紙トレイ３４上に排出される。The sheet to which the toner image has been transferred at the transfer portion is sequentially separated from the surface of the drum 21 by separating means (not shown), and is guided to the fixing device 31 by the conveyance guide device 30 and carried by the unfixed toner. The image T is heated and fixed, and is discharged as an image formed product (copy) onto a discharge tray 34 outside the machine through a guide 32 and a discharge roller 33.
【０１０２】画像転写後のドラム２１の面はクリーニン
グ装置２６により転写残りトナー等の付着汚染物の除去
を受けて繰り返して画像形成に使用される。The surface of the drum 21 after the image transfer is subjected to removal of adhered contaminants such as transfer residual toner by the cleaning device 26, and is repeatedly used for image formation.
【０１０３】ＰＣはプリンタ本体内のカートリッジ着脱
部に着脱されるプロセスカートリッジであり、本例の場
合は、像担持体としてのドラム２１、帯電器２２、現像
器２４、クリーニング装置２６の４つのプロセス機器を
包含させて一括してプリンター本体に対して着脱交換自
在としてある。The PC is a process cartridge which is attached / detached to / from the cartridge attaching / detaching portion in the printer main body. In the case of this example, the four processes of the drum 21, the charging device 22, the developing device 24, and the cleaning device 26 as an image carrier. The device is included and can be attached / detached to / from the printer body in a lump.
【０１０４】[0104]
【発明の効果】以上のように本発明によれば、電磁誘導
方式の加熱装置について、非通紙部過昇温現象を防止
し、通紙部領域の発熱分布を一様化させて被加熱材の安
定した加熱処理を実行させることができる。As described above, according to the present invention, in the heating device of the electromagnetic induction system, the phenomenon of excessive temperature rise of the non-sheet passing portion is prevented, and the heat generation distribution in the sheet passing portion area is made uniform to be heated. A stable heat treatment of the material can be performed.
【図１】 実施例１の加熱装置の概略構成を示す摸式図FIG. 1 is a schematic diagram showing a schematic configuration of a heating device according to a first embodiment.
【図２】 第１〜第３の３つの分割励磁コイルユニット
の斜視図FIG. 2 is a perspective view of first to third divided excitation coil units.
【図３】 その平面図FIG. 3 is a plan view thereof
【図４】 補助励磁コイルユニットを付加した例の平面
図FIG. 4 is a plan view of an example in which an auxiliary excitation coil unit is added.
【図５】 減磁コイルユニットを併設した分割励磁コイ
ルユニットの斜視図FIG. 5 is a perspective view of a divided excitation coil unit provided with a demagnetization coil unit.
【図６】 減磁コイルを併設した励磁コイルユニットの
斜視図FIG. 6 is a perspective view of an exciting coil unit provided with a demagnetizing coil.
【図７】 加熱装置の他の構成例の摸式図FIG. 7 is a schematic diagram of another configuration example of the heating device.
【図８】 （ａ）・（ｂ）・（ｃ）はそれぞれ加熱装置
の他の構成形態例の略図8 (a), (b), and (c) are schematic diagrams of other configuration examples of the heating device, respectively.
【図９】 画像形成装置例の概略構成図FIG. 9 is a schematic configuration diagram of an example of an image forming apparatus.
１ フィルム内面ガイドステー ２・３ 磁場発生手段としての鉄心（芯材）と励磁コ
イル ４ 導電部材としてのフィルム ４ａ フィルム基層 ４ｂ 導電層 ４ｃ 離形層 ５ 加圧ローラ Ｎ 圧接ニップ部 Ｐ 被加熱材としての被記録材 ６ 温度検知素子（サーミスタ） ７ 安全素子（温度ヒューズ、サーモスイッチ等） ８ 界磁コイルプレート ９ 誘導磁性材（磁性金属材） １０ 耐熱性フィルム1 film inner surface guide stay 2.3 iron core (core material) as magnetic field generating means and exciting coil 4 film as conductive member 4a film base layer 4b conductive layer 4c release layer 5 pressure roller N pressure contact nip P as heated material Recording material 6 Temperature detection element (thermistor) 7 Safety element (thermal fuse, thermo switch, etc.) 8 Field coil plate 9 Induction magnetic material (magnetic metal material) 10 Heat resistant film
───────────────────────────────────────────────────── フロントページの続き (72)発明者 杉浦 義則 東京都大田区下丸子３丁目30番２号 キヤ ノン株式会社内 (72)発明者 小川 賢一 東京都大田区下丸子３丁目30番２号 キヤ ノン株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshinori Sugiura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Kenichi Ogawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Within the corporation
Claims (10)
作用させて該導電部材に発生する渦電流による発熱によ
り該導電部材に直接もしくは間接に接して搬送される被
加熱材を加熱する電磁誘導加熱方式の加熱装置であり、 前記磁場発生手段が被加熱材の搬送方向と交差する方向
において分割して構成されている事を特徴とする加熱装
置。1. Electromagnetic induction heating for heating a material to be heated which is conveyed in direct or indirect contact with the conductive member due to heat generated by an eddy current generated in the conductive member by applying a magnetic field to a fixed or moving conductive member. A heating device of a system, wherein the magnetic field generating means is divided and configured in a direction intersecting a conveyance direction of a material to be heated.
磁場発生手段間に補助の磁場発生手段を配設した事を特
徴とする請求項１に記載の加熱装置。2. The heating apparatus according to claim 1, wherein an auxiliary magnetic field generating means is arranged between the divided magnetic field generating means of the magnetic field generating means which is divided.
磁場発生手段の少なくとも１部に減磁手段を配設した事
を特徴とする請求項１に記載の加熱装置。3. The heating device according to claim 1, wherein demagnetizing means is provided in at least a part of the divided magnetic field generating means of the magnetic field generating means formed by dividing.
磁手段が交番電流が流される励磁コイルもしくは減磁コ
イルである事を特徴とする請求項１乃至同３の何れかに
記載の加熱装置。4. The heating according to claim 1, wherein the magnetic field generating means, the auxiliary magnetic field generating means, and the demagnetizing means are exciting coils or demagnetizing coils through which an alternating current flows. apparatus.
接的に密着させる加圧部材を有する事を特徴とする請求
項１乃至同４の何れかに記載の加熱装置。5. The heating device according to claim 1, further comprising a pressing member for directly or indirectly adhering the member to be heated to the conductive member.
回転する加圧回転体である事を特徴とする請求項５に記
載の加熱装置。6. The heating device according to claim 5, wherein the pressure member is a pressure rotating body that is rotationally driven or driven to rotate.
走行移動有端部材である事を特徴とする請求項１乃至同
６の何れかに記載の加熱装置。7. The heating device according to claim 1, wherein the conductive member is a rotary endless member or a traveling / moving end member.
はそれ自体導電性の部材である事を特徴とする請求項１
乃至同７の何れかに記載の加熱装置。8. The conductive member is a laminated member including a conductive layer or a conductive member itself.
The heating device according to any one of 1 to 7.
録材であり、該被記録材に未定着画像を加熱定着させる
画像加熱定着装置である事を特徴とする請求項１乃至同
８の何れかに記載の加熱装置。9. The image heating fixing device according to claim 1, wherein the material to be heated is a recording material carrying an unfixed image, and the image heating fixing device heat-fixes the unfixed image on the recording material. The heating device according to any one of 8.
の加熱装置を被記録材に未定着画像を加熱定着させる画
像加熱定着装置として備えている事を特徴とする画像形
成装置。10. An image forming apparatus comprising the heating device according to claim 1 as an image heating fixing device for heating and fixing an unfixed image on a recording material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16877394A JPH0816006A (en) | 1994-06-28 | 1994-06-28 | Heating apparatus and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16877394A JPH0816006A (en) | 1994-06-28 | 1994-06-28 | Heating apparatus and image forming apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0816006A true JPH0816006A (en) | 1996-01-19 |
Family
ID=15874200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16877394A Pending JPH0816006A (en) | 1994-06-28 | 1994-06-28 | Heating apparatus and image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0816006A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002040845A (en) * | 2000-07-31 | 2002-02-06 | Canon Inc | Heater and image forming device |
| US6587654B1 (en) | 2002-01-07 | 2003-07-01 | Kabushiki Kaisha Toshiba | Image forming apparatus |
| US6882807B2 (en) * | 2000-02-22 | 2005-04-19 | Seiko Epson Corporation | Fixing device |
| WO2005055669A1 (en) * | 2003-12-03 | 2005-06-16 | Matsushita Electric Industrial Co., Ltd. | Heating device |
| JP2006337954A (en) * | 2005-06-06 | 2006-12-14 | Ricoh Co Ltd | Image forming apparatus and method for controlling temperature of fixing member of the same |
| US7268326B2 (en) | 2004-10-22 | 2007-09-11 | Canon Kabushiki Kaisha | Magnetic flux driven heat generation member with magnetic flux adjusting means |
| JP2008197475A (en) * | 2007-02-14 | 2008-08-28 | Konica Minolta Business Technologies Inc | Fixing apparatus |
| JP2009230070A (en) * | 2008-03-25 | 2009-10-08 | Ricoh Co Ltd | Fixing device and image forming apparatus |
| JP2009288722A (en) * | 2008-05-30 | 2009-12-10 | Ricoh Co Ltd | Fixing device and image forming device |
| US7764916B2 (en) | 2006-10-20 | 2010-07-27 | Konica Minolta Business Technologies, Inc. | Fixing device and image forming apparatus |
| JP2011034983A (en) * | 2010-11-15 | 2011-02-17 | Toshiba Corp | Fixing device |
| JP2013178579A (en) * | 2013-06-03 | 2013-09-09 | Ricoh Co Ltd | Fixing device and image forming apparatus |
-
1994
- 1994-06-28 JP JP16877394A patent/JPH0816006A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128230A3 (en) * | 2000-02-22 | 2008-11-26 | Seiko Epson Corporation | Fixing device |
| US6882807B2 (en) * | 2000-02-22 | 2005-04-19 | Seiko Epson Corporation | Fixing device |
| US6373036B2 (en) | 2000-07-31 | 2002-04-16 | Canon Kabushiki Kaisha | Induction heating apparatus having plurality of coils |
| JP2002040845A (en) * | 2000-07-31 | 2002-02-06 | Canon Inc | Heater and image forming device |
| US6587654B1 (en) | 2002-01-07 | 2003-07-01 | Kabushiki Kaisha Toshiba | Image forming apparatus |
| WO2005055669A1 (en) * | 2003-12-03 | 2005-06-16 | Matsushita Electric Industrial Co., Ltd. | Heating device |
| JPWO2005055669A1 (en) * | 2003-12-03 | 2007-12-06 | 松下電器産業株式会社 | Heating device |
| US7473871B2 (en) | 2003-12-03 | 2009-01-06 | Panasonic Corporation | Heating apparatus, fixing apparatus and image forming apparatus |
| JP4680777B2 (en) * | 2003-12-03 | 2011-05-11 | パナソニック株式会社 | Heating device |
| US7268326B2 (en) | 2004-10-22 | 2007-09-11 | Canon Kabushiki Kaisha | Magnetic flux driven heat generation member with magnetic flux adjusting means |
| JP2006337954A (en) * | 2005-06-06 | 2006-12-14 | Ricoh Co Ltd | Image forming apparatus and method for controlling temperature of fixing member of the same |
| US7764916B2 (en) | 2006-10-20 | 2010-07-27 | Konica Minolta Business Technologies, Inc. | Fixing device and image forming apparatus |
| US8165513B2 (en) | 2006-10-20 | 2012-04-24 | Konica Minolta Business Technologies, Inc. | Fixing device and image forming apparatus |
| JP2008197475A (en) * | 2007-02-14 | 2008-08-28 | Konica Minolta Business Technologies Inc | Fixing apparatus |
| JP2009230070A (en) * | 2008-03-25 | 2009-10-08 | Ricoh Co Ltd | Fixing device and image forming apparatus |
| US8185030B2 (en) | 2008-03-25 | 2012-05-22 | Ricoh Company Limited | Fixer, image forming apparatus including same, and fixing method |
| JP2009288722A (en) * | 2008-05-30 | 2009-12-10 | Ricoh Co Ltd | Fixing device and image forming device |
| JP2011034983A (en) * | 2010-11-15 | 2011-02-17 | Toshiba Corp | Fixing device |
| JP2013178579A (en) * | 2013-06-03 | 2013-09-09 | Ricoh Co Ltd | Fixing device and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3491973B2 (en) | Heating equipment | |
| JP3311111B2 (en) | Image heating device and rotating body for image heating | |
| JP5673053B2 (en) | Fixing apparatus and image forming apparatus | |
| JP4545899B2 (en) | Heating apparatus and image forming apparatus | |
| US7462804B2 (en) | Induction image heating apparatus | |
| JP4110046B2 (en) | Image heating device | |
| JP2012123219A (en) | Fixing device and image forming device | |
| JP3441820B2 (en) | Heating equipment | |
| JP2002056961A (en) | Heating device and image forming device | |
| JPH0816006A (en) | Heating apparatus and image forming apparatus | |
| JP2002190377A (en) | Heating device, image-heating device, and imaging device | |
| JPH0816007A (en) | Heating apparatus and image forming apparatus | |
| JP4277694B2 (en) | Fixing device and image forming apparatus using the same | |
| JPH0980939A (en) | Heating device for image forming device | |
| JPH0944015A (en) | Electromagnetically induced heat generating film, heater and image forming device | |
| JPH11258939A (en) | Heating device and image forming device | |
| JP2001230065A (en) | Image heating device and image forming apparatus | |
| JP3323658B2 (en) | Heating equipment | |
| JP3342193B2 (en) | Heating equipment | |
| JP2005203272A (en) | Heater, fixing device, and image recording device using it | |
| JPH086408A (en) | Heating device and image forming device | |
| JP4609146B2 (en) | Heating device, manufacturing method thereof, fixing device using the same, and image forming apparatus | |
| JP4438033B2 (en) | Fixing device | |
| JPH0863017A (en) | Method and device for heating image | |
| JP2003308957A (en) | Image heating device |