JPH0869190A - Fixing device - Google Patents

Fixing device

Info

Publication number
JPH0869190A
JPH0869190A JP20713294A JP20713294A JPH0869190A JP H0869190 A JPH0869190 A JP H0869190A JP 20713294 A JP20713294 A JP 20713294A JP 20713294 A JP20713294 A JP 20713294A JP H0869190 A JPH0869190 A JP H0869190A
Authority
JP
Japan
Prior art keywords
heat
thin body
endless thin
pressure roller
resistant endless
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
Application number
JP20713294A
Other languages
Japanese (ja)
Other versions
JP2953957B2 (en
Inventor
Chiseki Yamaguchi
智責 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP6207132A priority Critical patent/JP2953957B2/en
Publication of JPH0869190A publication Critical patent/JPH0869190A/en
Application granted granted Critical
Publication of JP2953957B2 publication Critical patent/JP2953957B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To provide a fixing device capable of performing quick heating with the excellent efficiency. CONSTITUTION: The fixing device is provided with the paper sheet transport heating part 1 and the pressure roller part for holding the unfixed toner fed to the paper sheet transport heating part 1 with the specified pressing force in company with the paper sheet transport heating part 1. The paper sheet transport heating part 1 is provided with the belt-shaped heat resistance endless thin body 1A moved together with the unfixed toner by the outside driving, the metallic supporting body 1B for holding the heat resistance endless thin body 1A from the inside, maintaining the state of the heat resistance endless thin body 1A held in contact with the pressure roller part 2 and guiding its rotary movement, and the induction heating coil 1C disposed opposite to the metallic supporting body 1B through the heat resistance endless thin body 1A, and then the induction heating coil 1C is equipped outside the pressure roller part 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、定着装置に係り、とく
に記録用紙上に付着した未定着トナーを記録用紙へ定着
させる定着装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device, and more particularly to a fixing device for fixing unfixed toner adhered on a recording sheet onto the recording sheet.

【0002】[0002]

【従来の技術】従来より、定着装置としては、安全性や
出力速度,或いはコスト等の面から熱圧力定着装置が一
般に多く用いられている。
2. Description of the Related Art Conventionally, as a fixing device, a thermal pressure fixing device has been widely used in terms of safety, output speed, cost and the like.

【0003】図2に、代表的な熱圧力定着装置の従来例
を示す。この図2に示す従来例にあっては、ヒートロー
ラ51と加圧ローラ52とにより一対のニップローラ系
を成しており、ヒートローラ51内には発熱源としての
ハロゲンランプ51Aが内装されている。ヒートローラ
51は、駆動手段(図示せず)により回転駆動され、加
圧ローラ52は表面に耐熱弾性層を有し,ヒートローラ
51側に加圧ばね54により押圧されており、同時にヒ
ートローラ51の回転に従動するように装備されてい
る。符号55はペーパガイドを示し、符号56は温度セ
ンサを示す。
FIG. 2 shows a conventional example of a typical thermal pressure fixing device. In the conventional example shown in FIG. 2, the heat roller 51 and the pressure roller 52 form a pair of nip roller systems, and a halogen lamp 51A as a heat source is installed inside the heat roller 51. . The heat roller 51 is rotationally driven by a driving means (not shown), and the pressure roller 52 has a heat resistant elastic layer on its surface and is pressed against the heat roller 51 side by a pressure spring 54, and at the same time, the heat roller 51. Equipped to follow the rotation of. Reference numeral 55 indicates a paper guide, and reference numeral 56 indicates a temperature sensor.

【0004】そして、例えば図2において、図示の矢印
の方向へ回転するヒートローラ51と加圧ローラ52と
の間を、ヒートローラ51側の面側に未定着トナーを付
着した用紙Pが通過すると、熱圧力によって定着が行わ
れるようになっている。ここで、この図2における装置
では、ヒートローラ51はハロゲンランプ51Aからの
輻射熱によって内面より加熱させるものである。
Then, for example, in FIG. 2, when the sheet P having unfixed toner adhered to the surface on the heat roller 51 side passes between the heat roller 51 and the pressure roller 52 which rotate in the direction of the arrow shown in FIG. The fixing is performed by heat pressure. Here, in the apparatus in FIG. 2, the heat roller 51 is heated from the inner surface by the radiant heat from the halogen lamp 51A.

【0005】また、近時においては、図3に示すように
耐熱性無端薄肉体61を用いた熱圧力式の定着装置も実
用化されている。これは、前述した図2におけるヒート
ローラ部分を耐熱性無端薄肉体61とライン状発熱体6
2にしたもので、この場合、加圧ローラ63が駆動手段
(図示せず)によって回転駆動され、耐熱性無端薄肉体
61を従動回転させるものである。
Recently, a thermo-pressure type fixing device using a heat-resistant endless thin body 61 as shown in FIG. 3 has been put into practical use. This is because the heat roller portion in FIG.
In this case, the pressure roller 63 is rotationally driven by the driving means (not shown), and the heat-resistant endless thin body 61 is driven to rotate.

【0006】そして、例えば図3において図示の矢印の
方向に回転する加圧ローラ63と耐熱性無端薄肉体61
との間を、ヒートローラ60側の面側に未定着トナーを
付着した用紙Pが通過すると、熱圧力によって定着が行
われるようになっている。耐熱性無端薄肉体61として
はニッケル電鋳,ポリイシドフィルム等が使用され、又
ライン状発熱体62としてはセラミック製ヒータ,シー
ズヒータ,面状ヒータ等が使用される。この図3におい
て、符号64は加圧ばねを示し、符号65は支持ガイド
を示し、符号66は温度センサを示す。
Then, for example, the pressure roller 63 and the heat-resistant endless thin body 61 which rotate in the direction of the arrow shown in FIG.
When the sheet P having the unfixed toner adhered to the surface of the heat roller 60 side passes between the space between and, the fixing is performed by thermal pressure. As the heat-resistant endless thin body 61, nickel electroforming, polyisid film or the like is used, and as the linear heating element 62, a ceramic heater, a sheath heater, a planar heater or the like is used. In FIG. 3, reference numeral 64 indicates a pressure spring, reference numeral 65 indicates a support guide, and reference numeral 66 indicates a temperature sensor.

【0007】更に、画像形成装置内で電磁誘導加熱を用
いたものとして、特開昭62−52584号公報や実開
平4−55055公報記載のものがある。
Further, as the one using electromagnetic induction heating in the image forming apparatus, there are those disclosed in Japanese Patent Laid-Open No. 62-52584 and Japanese Utility Model Laid-Open No. 4-55055.

【0008】この内、特開昭62−52584号公報で
は、感光体ドラムや静電記録用誘電体に於ける特性劣化
の防止対策として、加熱手段に電磁誘導加熱を用いるよ
うにしたもので、厚み数mmから10数mmの表面に感
光体層あるいは誘電体層を有する導電性支持体を内側あ
るいは外側に配設した電磁誘導加熱部により、誘導加熱
させるようにしたものである。
Among these, in JP-A-62-52584, electromagnetic induction heating is used as a heating means as a measure for preventing characteristic deterioration in the photosensitive drum and the electrostatic recording dielectric. Induction heating is performed by an electromagnetic induction heating unit having a conductive support having a photoconductor layer or a dielectric layer on the surface having a thickness of several mm to several tens of mm arranged inside or outside.

【0009】また、実開平4−55055号公報では、
前述した図2に示した従来例でのハロゲンランプに相当
する部分を、誘導加熱コイルに置き換えたもので、この
誘導加熱コイルに高周波電源より出力が印加され、ヒー
トローラを電磁誘導加熱させるようになっている。そし
て上述した図2,図3の場合と同じように、ヒートロー
ラと加圧ローラ間を用紙が通過し定着させるものであ
る。
Further, in Japanese Utility Model Laid-Open No. 4-55055,
The portion corresponding to the halogen lamp in the conventional example shown in FIG. 2 described above is replaced with an induction heating coil, and an output is applied to this induction heating coil from a high frequency power source to heat the heat roller by electromagnetic induction. Has become. Then, as in the case of FIGS. 2 and 3, the sheet passes between the heat roller and the pressure roller and is fixed.

【0010】[0010]

【発明が解決しようとする課題】しかしながら、上記従
来例においては、次のような不都合が生じている。
However, in the above conventional example, the following inconveniences occur.

【0011】まず、図2に開示した従来例においては、 .ハロゲンランプ51Aの発生熱が一部対流熱として
失われる。 .ヒートローラ51と加圧ローラ52の接触部以外か
らの放熱が大量にあり、これによって熱効率が悪くなり
消費電力が大となる。 .ヒートローラ51の長手方向において両端部での温
度低下があり、加熱温度の均一分布を形成しづらい。 .ガラス製ハロゲンランプ51Aのヒートローラ51
内へのアセンブリ取付や交換時の取り扱いに多くの時間
と労力を要し、破損等の危険もある。 .上記に関連して、ヒートローラ51自身が熱容
量をもち、ヒートローラ51の内側から加熱していたた
めウォームアップタイムがかかる。
First, in the conventional example disclosed in FIG. Part of the heat generated by the halogen lamp 51A is lost as convective heat. . A large amount of heat is radiated from a portion other than the contact portion between the heat roller 51 and the pressure roller 52, which reduces thermal efficiency and increases power consumption. . There is a temperature drop at both ends in the longitudinal direction of the heat roller 51, and it is difficult to form a uniform distribution of heating temperature. . Heat roller 51 of glass halogen lamp 51A
It takes a lot of time and labor to mount the assembly inside or handle it when replacing, and there is also a risk of damage. . In relation to the above, since the heat roller 51 itself has a heat capacity and is heated from the inside of the heat roller 51, warm-up time is required.

【0012】次に、図3に示した耐熱性無端薄肉体を用
いたものにおいては、図2の構成のものに比べてウォー
ムアップタイムの短縮や消費電力の低減を図り得るが、
以下、に示す不都合がある。 .ライン状発熱体62の温度変動が直接定着性能に影
響を与えるため、ライン状発熱体62の長手方向ならび
に経時的な点での温度均一性ならびに一定温度維持を保
つためのライン状発熱体62の製造時の均一性や動作時
の高精度な温度制御が必要となる。 .非常に細く長いライン状発熱体62を単体では形状
保持不安定な耐熱性無端薄肉体61に固定配設させ、か
つ耐熱性無端薄肉体61も回転可能に支持させるための
支持部材が必要となり、組み立てに手間がかかり、また
部材構成も複雑となる。
Next, in the case of using the heat-resistant endless thin body shown in FIG. 3, the warm-up time and the power consumption can be shortened as compared with the structure of FIG.
There are the following inconveniences. . Since the temperature variation of the line heating element 62 directly affects the fixing performance, the temperature uniformity of the line heating element 62 in the longitudinal direction and the point of time and the maintenance of the constant temperature of the line heating element 62 are maintained. Uniformity during manufacturing and highly accurate temperature control during operation are required. . A very thin and long line-shaped heating element 62 is fixedly arranged on the heat-resistant endless thin body 61 whose shape is unstable by itself, and a support member for rotatably supporting the heat-resistant endless thin body 61 is also required. It takes time and effort to assemble and the member structure becomes complicated.

【0013】また、実開平4−55055号公報記載の
ものでは、ヒートローラ中央に誘導加熱コイルを配設し
ているものの、この構成では下記に示す不都合が生じて
いる。 .ヒートローラと加熱コイル部が離れているため、電
磁誘導作用が発生しづらく、発熱効率が悪い。 .電磁誘導作用がヒートローラのみでなく、ヒートロ
ーラ周辺部材へも影響がおよび不必要な部材が加熱され
ることになる。 .ヒートローラを使用しているため、図2での場合と
同じようにヒートローラ全体を加熱する必要があり、ウ
ォームアップがかかり、また加圧ローラとの接触部以外
からの放熱も多く熱効率も悪い。
Further, in the one disclosed in Japanese Utility Model Laid-Open No. 4-55055, the induction heating coil is arranged at the center of the heat roller, but this structure has the following disadvantages. . Since the heat roller and the heating coil are separated from each other, the electromagnetic induction effect is hard to occur and the heat generation efficiency is poor. . Not only the heat roller is affected by the electromagnetic induction, but also the peripheral members of the heat roller are affected and unnecessary members are heated. . Since the heat roller is used, it is necessary to heat the entire heat roller as in the case of FIG. 2, warming up is required, and heat is radiated from a portion other than the contact portion with the pressure roller, resulting in poor thermal efficiency. .

【0014】[0014]

【発明の目的】本発明は、かかる従来例の有する不都合
を改善し、とくに加熱効率が良好で且つ急速加熱を可能
とした定着装置を提供することを、その目的とする。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing device which improves the inconvenience of the conventional example and has a particularly high heating efficiency and enables rapid heating.

【0015】[0015]

【課題を解決するための手段】本発明では、用紙搬送加
熱部と、この用紙搬送加熱部に送り込まれる未定着トナ
ーが付着した用紙を当該用紙搬送加熱部と共に所定の押
圧力をもって挟持する加圧ローラ部とを備えている。用
紙搬送加熱部は、外部駆動されて移動するベルト状の耐
熱性無端薄肉体と、この耐熱性無端薄肉体を内側から保
持すると共に,当該耐熱性無端薄肉体が加圧ローラ部に
当接した状態を維持し且つその回転移動を案内する金属
性支持体と、この金属性支持体に耐熱性無端薄肉体を介
して対向装備された誘導加熱コイルとを備えている。そ
して、この誘導加熱コイルは前述した加圧ローラ部の外
部に装備する、という構成を採っている。これによって
前述した目的を達成しようとするものである。
SUMMARY OF THE INVENTION In the present invention, a sheet conveying / heating unit and a pressurizing device for sandwiching a sheet fed with unfixed toner to the sheet conveying / heating unit with the sheet conveying / heating unit with a predetermined pressing force. And a roller portion. The sheet-conveying and heating unit holds a belt-shaped heat-resistant endless thin body that is driven by an external drive and the heat-resistant endless thin-body from the inside, and the heat-resistant endless thin body contacts the pressure roller unit. A metallic support that maintains the state and guides its rotational movement, and an induction heating coil that is installed opposite to the metallic support via a heat-resistant endless thin body are provided. The induction heating coil is installed outside the above-mentioned pressure roller section. This aims to achieve the above-mentioned object.

【0016】[0016]

【作用】本発明では、耐熱性無端薄肉体を介して加圧部
材に接触配設された金属支持体に、耐熱性無端薄肉体と
加圧部材が接触する部分を除いて、耐熱性無端薄肉体を
介して対向配設された誘導加熱コイル部に交流電流を流
すことで、電磁誘導作用により金属支持体と誘導加熱コ
イル部間に交番磁束が生じ、金属支持体内に加熱コイル
電流と反対方向の過電流が生じることとなってジュール
熱が発生、金属支持体が自己発熱し所定の温度に昇温さ
れる。
According to the present invention, the heat-resistant endless thin body is provided on the metal support provided in contact with the pressure-applying member via the heat-resistant endless thin body, except for the portion where the heat-resistant endless thin body and the pressurizing member contact. By passing an alternating current through the induction heating coil section that is arranged oppositely through the body, an alternating magnetic flux is generated between the metal support and the induction heating coil section due to the electromagnetic induction action, and the direction opposite to the heating coil current flows in the metal support. Overcurrent is generated and Joule heat is generated, and the metal support self-heats and is heated to a predetermined temperature.

【0017】昇温された金属支持体はほとんど熱容量を
持たない耐熱性無端薄肉体を介して加圧ローラ部材と接
触配設しているため、耐熱性無端薄肉体と加圧部材との
間を金属支持体側の面上に未定着トナーを付着した用紙
が通過することで、熱圧力によって定着が行われる。
Since the heated metal support is disposed in contact with the pressure roller member through the heat-resistant endless thin body having almost no heat capacity, the heat-resistant endless thin body and the pressure member are connected to each other. By passing the sheet having the unfixed toner attached on the surface on the metal support side, the fixing is performed by the thermal pressure.

【0018】[0018]

【実施例】以下、本発明の一実施例を図1に基づいて説
明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

【0019】この図1に示す実施例は、用紙搬送加熱部
1と、この用紙搬送加熱部1に送り込まれる未定着トナ
ーが付着した用紙を当該用紙搬送加熱部1と共に所定の
押圧力をもって挟持する加圧ローラ部2とを備えてい
る。
In the embodiment shown in FIG. 1, the sheet conveying / heating unit 1 and the sheet fed with the unfixed toner fed to the sheet conveying / heating unit 1 are nipped together with the sheet conveying / heating unit 1 with a predetermined pressing force. The pressure roller unit 2 is provided.

【0020】用紙搬送加熱部1は、外部駆動されて移動
するベルト状の耐熱性無端薄肉体1Aと、この耐熱性無
端薄肉体1Aを内側から保持すると共に,当該耐熱性無
端薄肉体1Aが加圧ローラ部2に当接した状態を維持し
且つその回転移動を案内する金属性支持体1Bと、この
金属性支持体1Bに前述した耐熱性無端薄肉体1Aを介
して対向装備された誘導加熱コイル1Cとを備えてい
る。この誘導加熱コイル1Cは、加圧ローラ部2の外部
に装備されている。
The sheet conveying / heating unit 1 holds the heat-resistant endless thin body 1A in the form of a belt which is driven by an external drive and moves, and holds the heat-resistant endless thin body 1A from the inside. A metallic support 1B that maintains the state of contact with the pressure roller unit 2 and guides its rotational movement, and induction heating provided opposite to the metallic support 1B via the heat-resistant endless thin body 1A described above. And a coil 1C. The induction heating coil 1C is provided outside the pressure roller unit 2.

【0021】また、前述した金属性支持体1Bは、その
外周が断面半円弧状に形成されている。そして、この金
属性支持体1Bは、加圧ローラ部2との対向面を基準と
して,その一端部が前述した耐熱性無端薄肉体1Aの回
転移動方向の上流側に向けて延設されている。また、耐
熱性無端薄肉体1Aは、本実施例では、筒状に形成され
ている。
The outer periphery of the metallic support 1B described above is formed in a semi-circular shape in cross section. The metallic support 1B has one end extending toward the upstream side in the rotational movement direction of the heat-resistant endless thin body 1A described above with reference to the surface facing the pressure roller portion 2. . Further, the heat-resistant endless thin body 1A is formed in a tubular shape in this embodiment.

【0022】これを更に詳述すると、図1において、耐
熱性無端薄肉体1Aは、厚さ20〔μm〕〜0.1〔m
m〕程度のニッケル電鋳またはポリイシドフィルムより
なり、回転自在に金属性支持体1Bに支持されている。
This will be described in more detail. In FIG. 1, the heat-resistant endless thin body 1A has a thickness of 20 [μm] to 0.1 [m].
m] of nickel electroformed or polysided film, and is rotatably supported by the metallic support 1B.

【0023】また、金属性支持体1Bは、耐熱性無端薄
肉体1A内にあって加圧ローラ部2に耐熱性無端薄肉体
1Aを介して接触配設され、用紙挿入側方向に延長され
た部分を有し、炭素鋼,真ちゅう,アルミ等により形成
されている。
Further, the metallic support 1B is disposed inside the heat-resistant endless thin body 1A, is disposed in contact with the pressure roller portion 2 via the heat-resistant endless thin body 1A, and is extended in the sheet insertion side direction. It has a portion and is made of carbon steel, brass, aluminum or the like.

【0024】加圧ローラ部2は、図示しない駆動手段に
よって駆動され,前述した耐熱性無端薄肉体1Aに接触
している表面には耐熱弾性層2Aが装備されている。
The pressure roller portion 2 is driven by a driving means (not shown), and a heat resistant elastic layer 2A is provided on the surface in contact with the heat resistant endless thin body 1A.

【0025】誘導加熱コイル1Cは、前述した加圧ロー
ラ部2と耐熱性無端薄肉体1Aの接触する部分を除い
て、耐熱性無端薄肉体1Aの外側に装備され、耐熱性無
端薄肉体1Aを介して金属性支持体1Bと対向配設され
た耐熱性無端薄肉体1A側に,耐熱樹脂あるいはセラミ
ック等よりなる絶縁性層1Caを備えている。
The induction heating coil 1C is provided outside the heat-resistant endless thin body 1A except for the contact portion between the pressure roller portion 2 and the heat-resistant endless thin body 1A. An insulating layer 1Ca made of a heat-resistant resin or ceramic or the like is provided on the heat-resistant endless thin-walled body 1A side opposite to the metallic support 1B.

【0026】また、符号3は、加圧ローラ部2と耐熱性
無端薄肉体1Aの接触部付近の金属性支持体1Bの温度
を検出するよう取り付けられた温度センサを示す。
Reference numeral 3 denotes a temperature sensor attached so as to detect the temperature of the metallic support 1B near the contact portion between the pressure roller portion 2 and the heat-resistant endless thin body 1A.

【0027】更に、本実施例では、誘導加熱コイル1C
に交流電流を供給する誘導加熱用電源4と、温度センサ
3からのデータに基づき誘導加熱用電源4の出力を制御
する誘導加熱用電源制御部5と、加圧ローラ部2と耐熱
性無端薄肉体1Aとの接触域へ用紙P等を導き入れ,か
つ接触域からの用紙Pの排出ガイドとなるペーパーガイ
ド7とを備えている。符号6は用紙導入側のペーパーガ
イドを示す。
Further, in this embodiment, the induction heating coil 1C is used.
Induction heating power supply 4 for supplying alternating current to the induction heating power source, induction heating power supply control unit 5 for controlling the output of the induction heating power supply 4 based on the data from the temperature sensor 3, the pressure roller unit 2 and the heat-resistant endless thin A paper guide 7 is provided which guides the paper P or the like into the contact area with the body 1A and serves as a guide for discharging the paper P from the contact area. Reference numeral 6 indicates a paper guide on the paper introduction side.

【0028】次に、上記実施例の動作について説明す
る。
Next, the operation of the above embodiment will be described.

【0029】回転駆動手段(図示せず)により、加圧ロ
ーラ部2が矢印の方向へ回転すると、この加圧ローラ部
2の回転に従動して耐熱性無端薄肉体1Aが回転する。
温度センサ3によって金属性支持体1Bの表面温度が検
出され、定着に不充分な温度であることが検出される
と、誘導加熱用電源制御部5が誘導加熱用電源4への出
力を出力し、誘導加熱コイル1Cへ交流電流が供給され
る。なお、ここでは適用周波数として10〔kHz 〕以下
が使用される。
When the pressure roller portion 2 is rotated in the direction of the arrow by the rotation driving means (not shown), the heat resistant endless thin body 1A is rotated by the rotation of the pressure roller portion 2.
When the temperature sensor 3 detects the surface temperature of the metallic support 1B and detects that the temperature is insufficient for fixing, the induction heating power source control unit 5 outputs an output to the induction heating power source 4. An alternating current is supplied to the induction heating coil 1C. Here, an applied frequency of 10 [kHz] or less is used.

【0030】これによって、誘導加熱コイル1Cと金属
性支持体1Bとの間に交番磁束が生じ、金属性支持体1
Bが励磁されて金属性支持体1B中に加熱コイル電流と
反対方向の過電流が生じ、これによってジュール熱が発
生し、金属性支持体1Bは自己発熱して昇温する。かか
る動作は、加圧ローラ部2及び耐熱性無端薄肉体1Aを
回転させながら金属性支持体1Bの昇温がなされ、定着
に充分な温度が温度センサ3に検出されるまで続けられ
る。
As a result, an alternating magnetic flux is generated between the induction heating coil 1C and the metallic support 1B, and the metallic support 1
When B is excited, an overcurrent in the direction opposite to the heating coil current is generated in the metallic support 1B, Joule heat is thereby generated, and the metallic support 1B self-heats and rises in temperature. This operation is continued until the temperature of the metallic support 1B is raised while rotating the pressure roller portion 2 and the heat-resistant endless thin body 1A, and the temperature sensor 3 detects a temperature sufficient for fixing.

【0031】そして、金属性支持体1Bが定着に充分な
温度になった後は、定着するに必要な温度の維持を行う
よう誘導加熱用電源4の出力を誘導加熱用電源制御部5
が温度センサ信号に基づいて制御する。
After the metallic support 1B has reached a temperature sufficient for fixing, the output of the induction heating power source 4 is controlled so as to maintain the temperature required for fixing.
Controls based on the temperature sensor signal.

【0032】このようにして、金属性支持体1Bが定着
に必要な温度になると、転写部(図示せず)にて、表面
に印材(トナー)が付着した用紙Pが挿入側のペーパー
ガイド6にそって、耐熱性無端薄肉体1A側にトナーが
付着した面を配置して耐熱性無端薄肉体1Aと加圧ロー
ラ部2の接触部へ挿入される。
In this way, when the temperature of the metal support 1B reaches the temperature required for fixing, the paper P having the printing material (toner) adhered on its surface is inserted into the paper guide 6 at the transfer portion (not shown). Accordingly, the surface on which the toner adheres is arranged on the heat-resistant endless thin body 1A side, and the heat-resistant endless thin body 1A is inserted into the contact portion between the heat-resistant endless thin body 1A and the pressure roller portion 2.

【0033】接触部にて、用紙Pは耐熱性無端薄肉体1
Aを介して金属性支持体1Bより加熱され、加圧ローラ
部2からの押圧とによってトナーは用紙Pへ定着され
る。この定着された用紙Pは、接触部より離れ排出側ペ
ーパーガイド7にそって排出される。
At the contact portion, the paper P is a heat-resistant endless thin body 1
The toner is fixed on the paper P by being heated by the metallic support 1B via A and being pressed by the pressure roller portion 2. The fixed paper P is ejected along the ejection side paper guide 7 apart from the contact portion.

【0034】一方、耐熱性無端薄肉体1Aは、回転によ
って次なる定着へと使用される。
On the other hand, the heat-resistant endless thin body 1A is used for the next fixing by rotation.

【0035】ここで、本実施例で、金属性支持体1Bを
一様な材質また均一厚みとして示したが、材質は一様で
ある必要はなく、特に誘導加熱コイル部1Cと対向配設
している部分と耐熱性無端薄肉体1Aと加圧ローラ部2
が接触している部分に近いところの部分とで,材質の異
なるもの,あるいは徐々に変化させたものを用いてもよ
い。加熱コイル部1Cに対向配設させている部分に比べ
て耐熱性無端薄肉体1Aと加圧ローラ部2が接触してい
る部分に近いところの部分には、自己発熱しやすい材質
アルミに対して炭素鋼を用いるようにしてもよい。更
に、接触部付近の部分には熱伝導の良い銅などを用いて
もよい。
Here, in this embodiment, the metallic support 1B is shown to have a uniform material and a uniform thickness, but the material does not have to be uniform, and in particular, it is disposed so as to face the induction heating coil portion 1C. Portion, heat-resistant endless thin body 1A and pressure roller portion 2
It is possible to use a different material or a gradually changing material for the portion close to the portion in contact with. Compared to the portion opposite to the heating coil portion 1C, the portion near the portion where the heat-resistant endless thin body 1A and the pressure roller portion 2 are in contact with each other is Carbon steel may be used. Further, copper or the like having good thermal conductivity may be used in the portion near the contact portion.

【0036】また、金属性支持体1Bの厚みについて
も、均一にする必要はなく、支持機能に問題を生じない
範囲で変化させることも可能であり、更に、加熱コイル
部1Cの対向部分を薄めに、接触部を厚めに形成し、合
わせて材質を接触部に熱伝導の良い材質を用いるなどの
ことも可能である。
The thickness of the metallic support 1B does not have to be uniform, and can be changed within a range that does not cause a problem in the support function. Further, the facing portion of the heating coil portion 1C can be thinned. In addition, it is also possible to form the contact portion to be thick and to use a material having good heat conduction for the contact portion.

【0037】さらに、耐熱性無端薄肉体1Aとして絶縁
性部材を用いると、前述した誘導加熱コイル部1Cの耐
熱性無端薄肉体1A側に設けた絶縁層1Caは省略して
もよい。
Further, when an insulating member is used as the heat-resistant endless thin body 1A, the insulating layer 1Ca provided on the heat-resistant endless thin body 1A side of the induction heating coil portion 1C described above may be omitted.

【0038】また、ここでは示していないが、耐熱性無
端薄肉体1Aの外面のクリーニングをするクリーニング
パッドや接触部からの用紙剥離を確実なものとする分離
爪等も必要に応じて取り付けてよい。
Although not shown here, a cleaning pad for cleaning the outer surface of the heat-resistant endless thin body 1A, a separating claw for ensuring the peeling of the paper from the contact portion, and the like may be attached if necessary. .

【0039】また、本実施例では、加圧ローラ部2を駆
動する場合について例示したが、本発明は何らこれに限
定するものでなく、また図では耐熱性無端薄肉体1Aを
略円筒に示したがベルト状に形成し走行するように構成
してもよい。加圧ローラ部2についても、ベルト状に形
成し走行するように構成してもよい。誘導加熱用電源出
力電流も使用状態に応じて、その出力電流値,周波数を
変化させてもよい。
In this embodiment, the case where the pressure roller portion 2 is driven has been exemplified, but the present invention is not limited to this, and the heat-resistant endless thin body 1A is shown in a substantially cylindrical shape in the drawing. However, it may be formed in a belt shape and configured to run. The pressure roller unit 2 may also be formed in a belt shape and configured to run. The output current of the induction heating power source may also be changed in its output current value and frequency according to the usage state.

【0040】本実施例は、上述のように構成され機能す
るので、以下に示す利点を備えている。
Since this embodiment is constructed and functions as described above, it has the following advantages.

【0041】.まず電磁誘導加熱方式を用いたことで
加熱効率が高い急速加熱ができ、温度制御が容易とな
る。
.. First, by using the electromagnetic induction heating method, rapid heating with high heating efficiency can be performed and temperature control becomes easy.

【0042】.被加熱材である金属性支持体1Bと誘
導加熱コイル部1Cが対向接近配設されているため、さ
らに加熱効率が更にアップし、加えて周辺部材,特に金
属部材があったとしてもその影響はほとんどなく安全で
ある。
.. Since the metallic support 1B, which is the material to be heated, and the induction heating coil portion 1C are arranged close to each other, the heating efficiency is further improved, and even if there are peripheral members, especially metal members, the effect is It is almost safe.

【0043】.熱容量がありウォームアップタイムも
かかる厚肉ヒートローラを用いていないため、放熱量も
少なく、金属性支持体もコンパクトであるため、急速加
熱ができる。
.. Since a thick heat roller that has a heat capacity and a warm-up time is not used, the amount of heat radiation is small and the metallic support is compact, so rapid heating is possible.

【0044】.上記〜によって低消費電力化が実
現できる。
.. Low power consumption can be realized by the above items.

【0045】.被加熱材である金属性支持体1Bが耐
熱性無端薄肉体1Aの支持も兼用しており、構成がシン
プルとなり、組み立ても容易である。
.. The metal support 1B, which is the material to be heated, also serves as the support for the heat-resistant endless thin body 1A, and the structure is simple and the assembly is easy.

【0046】.誘導加熱コイル部1C、「金属性支持
体1B+耐熱性無端薄肉体1A」、加圧ローラ部2、と
各ユニット化ができるため、組み立てが容易に行える。
また、特に「金属性支持体1B+耐熱性無端薄肉体1
A」の部分に対してユニット化することにより交換が容
易になる。
[0046] Since the induction heating coil portion 1C, the "metal support 1B + the heat-resistant endless thin body 1A", and the pressure roller portion 2 can be unitized, they can be easily assembled.
In addition, especially "metal support 1B + heat-resistant endless thin body 1"
The unit "A" can be replaced easily.

【0047】.金属性支持体1Bが用紙挿入側に延長
されており、耐熱性無端薄肉体1Aの回転支持において
も有効であり、また薄肉体が多少厚めになって熱容量を
有したとしても、熱を有効に用紙Pへ供給できる。
.. Since the metallic support 1B is extended to the paper insertion side, it is effective for supporting the rotation of the heat-resistant endless thin body 1A, and even if the thin body has a slightly thicker heat capacity, the heat can be effectively applied. The paper P can be supplied.

【0048】.誘導加熱コイル部1Cを用紙送行幅方
向で分割することにより、特に幅の狭い用紙Pにおいて
も、その通紙幅に相当する部分の金属性支持体1Bの幅
の部分のみを加熱るすことが可能である。
.. By dividing the induction heating coil portion 1C in the sheet feeding width direction, it is possible to heat only the portion of the width of the metallic support 1B corresponding to the sheet passing width, even for the narrow sheet P. Is.

【0049】[0049]

【発明の効果】本発明は以上のように構成され機能する
ので、これによると、加熱効率が高く、しかも温度制御
が容易となり、被加熱材である金属性支持体と誘導加熱
コイル部が対向接近配設されているため、さらに加熱効
率を改善することができ、熱容量がありウォームアップ
タイムもかかる厚肉ヒートローラを用いていないため、
放熱量も少なく、金属性支持体もコンパクトであるた
め、急速加熱ができ、全体的に低消費電力化が実現でき
るという従来にない優れた定着装置を提供することがで
きる。
Since the present invention is constructed and functions as described above, according to this, the heating efficiency is high and the temperature control is easy, and the metallic support, which is the material to be heated, and the induction heating coil section face each other. Since they are arranged close to each other, the heating efficiency can be further improved, and since a thick heat roller that has a heat capacity and a warm-up time is not used,
Since the amount of heat radiation is small and the metallic support is compact, it is possible to provide an unprecedented excellent fixing device that can perform rapid heating and achieve low power consumption as a whole.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.

【図2】従来例を示す説明図である。FIG. 2 is an explanatory diagram showing a conventional example.

【図3】他の従来例を示す説明図である。FIG. 3 is an explanatory diagram showing another conventional example.

【符号の説明】[Explanation of symbols]

1 用紙搬送加熱部 1A 耐熱性無端薄肉体 1B 金属性支持体 1C 誘導加熱コイル部 2 加圧ローラ部 1 Paper Transport Heating Section 1A Heat Resistant Endless Thin Body 1B Metal Support 1C Induction Heating Coil Section 2 Pressure Roller Section

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 用紙搬送加熱部と、この用紙搬送加熱部
に送り込まれる未定着トナーが付着した用紙を当該用紙
搬送加熱部と共に所定の押圧力をもって挟持する加圧ロ
ーラ部とを備えた定着装置において、 前記用紙搬送加熱部を、外部駆動されて移動するベルト
状の耐熱性無端薄肉体と、この耐熱性無端薄肉体を内側
から保持すると共に,当該耐熱性無端薄肉体が前記加圧
ローラ部に当接した状態を維持し且つその回転移動を案
内する金属性支持体と、この金属性支持体に前記耐熱性
無端薄肉体を介して対向装備された誘導加熱コイルとを
備え、 この誘導加熱コイルを前記加圧ローラ部の外部に装備し
たことを特徴とする定着装置。
1. A fixing device comprising: a paper transport heating unit; and a pressure roller unit for sandwiching the paper, to which the unfixed toner is attached, fed to the paper transport heating unit with the paper transport heating unit with a predetermined pressing force. In the paper conveyance heating section, a belt-shaped heat-resistant endless thin body that is driven by an external drive to move, and the heat-resistant endless thin body is held from the inside, and the heat-resistant endless thin body is the pressure roller section. A metal support that maintains a state of contact with the body and guides its rotational movement; and an induction heating coil that is installed opposite to the metal support via the heat-resistant endless thin body. A fixing device comprising a coil provided outside the pressure roller unit.
【請求項2】 前記金属性支持体は、その外周が断面半
円弧状に形成されていることを特徴とした請求項1記載
の定着装置。
2. The fixing device according to claim 1, wherein the metallic support has an outer periphery formed in a semicircular arc shape in cross section.
【請求項3】 前記金属性支持体は、前記加圧ローラ部
との対向面を基準として前記耐熱性無端薄肉体の回転移
動方向の上流側に向けて延設されていることを特徴とし
た請求項1又は2記載の定着装置。
3. The metallic support is extended toward the upstream side in the rotational movement direction of the heat-resistant endless thin body with reference to the surface facing the pressure roller portion. The fixing device according to claim 1.
【請求項4】 前記耐熱性無端薄肉体は、筒状に形成さ
れていることを特徴とする請求項1記載の1,2又は3
記載の定着装置。
4. The heat-resistant endless thin-walled body is formed in a tubular shape, 1, 2, or 3 according to claim 1.
The fixing device described.
JP6207132A 1994-08-31 1994-08-31 Fixing device Expired - Lifetime JP2953957B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6207132A JP2953957B2 (en) 1994-08-31 1994-08-31 Fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6207132A JP2953957B2 (en) 1994-08-31 1994-08-31 Fixing device

Publications (2)

Publication Number Publication Date
JPH0869190A true JPH0869190A (en) 1996-03-12
JP2953957B2 JP2953957B2 (en) 1999-09-27

Family

ID=16534729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6207132A Expired - Lifetime JP2953957B2 (en) 1994-08-31 1994-08-31 Fixing device

Country Status (1)

Country Link
JP (1) JP2953957B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11135246A (en) * 1997-10-29 1999-05-21 Canon Inc Heating device and image forming device
US6445902B1 (en) 2001-03-28 2002-09-03 Hewlett-Packard Company Simplified fusing system
US6721530B2 (en) * 2001-03-28 2004-04-13 Hewlett-Packard Development Company, L.P. Fusing system having electromagnetic heating
US6810230B2 (en) 2000-09-29 2004-10-26 Matsushita Electric Industrial Co., Ltd. Electromagnetic induction image heating device and image forming apparatus
US6819904B2 (en) 1999-03-02 2004-11-16 Matsushita Electric Industrial Co., Ltd. Image heating device and image forming apparatus using the same
JP2006251479A (en) * 2005-03-11 2006-09-21 Fuji Xerox Co Ltd Fixing device and image forming device
US8600254B2 (en) 2010-05-19 2013-12-03 Kabushiki Kaisha Toshiba Fixing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933474A (en) * 1982-08-19 1984-02-23 Matsushita Electric Ind Co Ltd Fixation roll for copying machine
JPS61261763A (en) * 1985-05-16 1986-11-19 Seikosha Co Ltd Fixing device for electrophotographic recording device
JPH05210327A (en) * 1992-01-30 1993-08-20 Minolta Camera Co Ltd Fixing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933474A (en) * 1982-08-19 1984-02-23 Matsushita Electric Ind Co Ltd Fixation roll for copying machine
JPS61261763A (en) * 1985-05-16 1986-11-19 Seikosha Co Ltd Fixing device for electrophotographic recording device
JPH05210327A (en) * 1992-01-30 1993-08-20 Minolta Camera Co Ltd Fixing device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11135246A (en) * 1997-10-29 1999-05-21 Canon Inc Heating device and image forming device
US6819904B2 (en) 1999-03-02 2004-11-16 Matsushita Electric Industrial Co., Ltd. Image heating device and image forming apparatus using the same
US6810230B2 (en) 2000-09-29 2004-10-26 Matsushita Electric Industrial Co., Ltd. Electromagnetic induction image heating device and image forming apparatus
US6445902B1 (en) 2001-03-28 2002-09-03 Hewlett-Packard Company Simplified fusing system
US6721530B2 (en) * 2001-03-28 2004-04-13 Hewlett-Packard Development Company, L.P. Fusing system having electromagnetic heating
JP2006251479A (en) * 2005-03-11 2006-09-21 Fuji Xerox Co Ltd Fixing device and image forming device
US8600254B2 (en) 2010-05-19 2013-12-03 Kabushiki Kaisha Toshiba Fixing device
US8913910B2 (en) 2010-05-19 2014-12-16 Kabushiki Kaisha Toshiba Fixing device

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