JPH10241832A - Heating apparatus and heating rotor - Google Patents
Heating apparatus and heating rotorInfo
- Publication number
- JPH10241832A JPH10241832A JP26875597A JP26875597A JPH10241832A JP H10241832 A JPH10241832 A JP H10241832A JP 26875597 A JP26875597 A JP 26875597A JP 26875597 A JP26875597 A JP 26875597A JP H10241832 A JPH10241832 A JP H10241832A
- Authority
- JP
- Japan
- Prior art keywords
- power receiving
- receiving member
- power supply
- heating
- 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
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電子写真方式の複写
機、プリンタ等の画像形成装置に備えられ、トナー像等
の未定着画像を保持した記録材に該画像を加熱して定着
させる定着装置において利用できる加熱装置、及び該加
熱装置の一つの構成要素である加熱回転体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device provided in an image forming apparatus such as an electrophotographic copying machine or a printer for heating and fixing an unfixed image such as a toner image on a recording material. And a heating rotator which is one component of the heating device.
【０００２】[0002]
【従来の技術】プリンタ、複写機等の画像形成装置にお
ける定着装置は、一般的には、加熱ローラを備えてお
り、トナー像等の未定着画像を保持した記録材を該加熱
ローラとバックアップ部材（一般的には加圧ローラ）と
の間に挟持させつつ通過させることによって、該未定着
画像を記録材上に加熱加圧して定着させている。2. Description of the Related Art A fixing device in an image forming apparatus such as a printer or a copying machine generally includes a heating roller, and a recording material holding an unfixed image such as a toner image is transferred to the heating roller and a backup member. (Generally, a pressure roller), the unfixed image is heated and pressurized and fixed on the recording material by being passed through while being pinched.
【０００３】かかる加熱ローラにはこれまでハロゲンラ
ンプヒータ等の発熱ヒータを内蔵して、該ヒータからの
輻射熱でローラを加熱するものが多用されてきた。しか
しハロゲンランプヒータ等の内蔵発熱ヒータを熱源とす
る加熱ローラによると、該ヒータの通電開始時から加熱
ローラ表面の所定定着温度までの昇温速度が遅く、その
ため画像形成装置の電源スイッチをオンしてから加熱ロ
ーラが所定温度に到達するまでの予熱時間（いわゆるウ
ォーミングアップ時間）が長くなり、それだけ装置が使
い難くなっていた。Hitherto, a heating roller having a built-in heating heater such as a halogen lamp heater and heating the roller by radiant heat from the heater has been widely used. However, according to the heating roller using a built-in heating heater such as a halogen lamp heater as a heat source, the temperature rising speed from the start of energization of the heater to a predetermined fixing temperature on the surface of the heating roller is slow, so that the power switch of the image forming apparatus is turned on. The pre-heating time (so-called warm-up time) from when the heating roller reaches the predetermined temperature until the heating roller reaches a predetermined temperature becomes longer, and the apparatus becomes more difficult to use.
【０００４】そこで所定温度に到達するまでの昇温時間
が短く済む加熱ローラとして、芯ローラに通電により発
熱する物質よりなる抵抗発熱体を該芯ローラとともに回
転するように形成した加熱ローラが提案されている。こ
のタイプの加熱ローラは電気・熱変換効率が良く、該抵
抗発熱体への通電開始後速やかに加熱ローラ表面温度を
所定温度まで上昇させることができ、これにより加熱ロ
ーラの予熱時間を短縮することができる。Therefore, as a heating roller which requires a short time for raising the temperature to reach a predetermined temperature, there has been proposed a heating roller in which a resistance heating element made of a substance which generates heat by energizing the core roller is formed so as to rotate together with the core roller. ing. This type of heating roller has good electric-to-heat conversion efficiency, and can raise the surface temperature of the heating roller to a predetermined temperature immediately after the current supply to the resistance heating element is started, thereby shortening the preheating time of the heating roller. Can be.
【０００５】このタイプの加熱ローラにおいては、抵抗
発熱体に通電するために、一般的には、抵抗発熱体に電
気的に接続形成され、加熱ローラと共に回転する受電部
材及び該受電部材に接触せしめられる給電部材が設けら
れ、それらを介して該抵抗発熱体に通電される。より具
体的に言えば、芯ローラの外周面に、芯ローラと一体的
に回転するようにリング状の受電部材を設け、受電部材
の外周面側から接触するように給電部材を設けた加熱ロ
ーラが提案されている。[0005] In this type of heating roller, in order to energize the resistance heating element, generally, the heating roller is electrically connected to the resistance heating element and rotates with the heating roller. Power supply members are provided, and the resistance heating elements are energized through them. More specifically, a heating roller in which a ring-shaped power receiving member is provided on the outer peripheral surface of the core roller so as to rotate integrally with the core roller, and a power supply member is provided so as to contact from the outer peripheral surface side of the power receiving member Has been proposed.
【０００６】また、加熱ローラを回転可能に支持する軸
受けに給電部材を兼用させた加熱ローラも提案されてい
る。A heating roller has also been proposed in which a power supply member is also used as a bearing that rotatably supports the heating roller.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、未定着画像
を保持した記録材に該画像を加熱定着させる定着装置に
おいて利用できる加熱装置であり、周面を回転移動させ
る回転体に設けた抵抗発熱体に対して給電するタイプの
加熱装置であって、構造の多様性をもたらし、構造の選
択の幅を広げることを可能ならしめる加熱装置を提供す
ることを課題とする。SUMMARY OF THE INVENTION The present invention relates to a heating device which can be used in a fixing device for heating and fixing an unfixed image on a recording material holding the image. An object of the present invention is to provide a heating device of a type that supplies power to a heating element, which provides a variety of structures and enables a wider range of structure choices.
【０００８】また、本発明は上記加熱装置のための加熱
回転体を提供することを課題とする。Another object of the present invention is to provide a heating rotator for the heating device.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決するため
に本発明は、周面を回転移動させる無端状回転体と、前
記無端状回転体の周面に対し設けられ、通電により発熱
する抵抗発熱体と、前記無端状回転体の中空内部に設け
られ、前記抵抗発熱体に電気的に接続された受電部材
と、前記受電部材に接触し、電源に電気的に接続される
給電部材とを備えていることを特徴とする加熱装置、及
び加熱装置に用いる加熱回転体であり、周面を回転移動
させる無端状回転体と、前記無端状回転体の周面に対し
設けられ、通電により発熱する抵抗発熱体と、前記加熱
装置に設けられる給電部材と接触させるために前記無端
状回転体の中空内部に設けられ、前記抵抗発熱体に電気
的に接続された受電部材とを備えていることを特徴とす
る加熱回転体を提供する。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an endless rotating body for rotating a peripheral surface thereof, and a resistor provided on the peripheral surface of the endless rotating body for generating heat when energized. A heating element, a power receiving member provided inside the hollow of the endless rotating body and electrically connected to the resistance heating element, and a power supply member that contacts the power receiving member and is electrically connected to a power supply. A heating device, and a heating rotator used for the heating device, wherein the heating device is provided on an endless rotator for rotating the peripheral surface, and provided on the peripheral surface of the endless rotator, and generates heat by energization. Resistance heating element, and a power receiving member provided inside the hollow of the endless rotating body to be in contact with a power supply member provided in the heating device, and electrically connected to the resistance heating element. Providing a heated rotating body characterized by That.
【００１０】本発明に係る加熱装置は、例えば、電子写
真方式の複写機、プリンタ等の画像形成装置に搭載さ
れ、未定着画像を保持した紙等の記録材に該画像を加熱
して定着させる定着装置において、記録材上の未定着画
像を加熱する加熱装置として利用することができる。ま
た、本発明に係る加熱回転体は、かかる加熱装置の一つ
の構成要素であり、長期の使用によって摩耗などして交
換などする必要があるときなどに、かかる交換部品とし
て利用することができる。A heating device according to the present invention is mounted on an image forming apparatus such as an electrophotographic copying machine or a printer, and heats and fixes an unfixed image on a recording material such as paper holding the image. The fixing device can be used as a heating device for heating an unfixed image on a recording material. The heating rotator according to the present invention is one component of such a heating device, and can be used as such a replacement part when it is necessary to replace it due to wear or the like due to long-term use.
【００１１】前記無端状回転体としては、例えばローラ
を挙げることができる。かかる無端状回転体は、少なく
とも一部が中空に形成されている。熱容量を下げるため
や、重量を軽減するなどのために全体を中空にしてもよ
い。無端状回転体を例えばローラとするときには、かか
るローラを中空円筒状してもよい。無端状回転体として
は、ローラの他、可撓性のフィルム、シート、薄板など
を無端状にしたものを挙げることができる。As the endless rotary member, for example, a roller can be used. At least a part of the endless rotating body is formed to be hollow. The whole may be hollow to reduce the heat capacity or to reduce the weight. When the endless rotating body is, for example, a roller, the roller may have a hollow cylindrical shape. Examples of the endless rotating body include not only rollers but also flexible films, sheets, thin plates, and the like, which are made endless.
【００１２】無端状回転体の周面（周壁）に対しては、
通電により発熱する抵抗発熱体が形成されている。抵抗
発熱体は、無端状回転体の外周面又は内周面、或いはこ
れらの双方に形成される。抵抗発熱体は、無端状回転体
の周面に直接形成しても、無端状回転体と抵抗発熱体と
の間の電気的な絶縁性を保つための絶縁体などを介して
間接的に無端状回転体の周面に形成してもよい。周面を
回転移動させる無端状回転体の周面に対し形成されてい
る抵抗発熱体は、無端状回転体の周面回転移動に伴い一
体的に回転移動する。なお、無端状回転体の最も外側の
外周面には、溶融トナーの付着を防止するためのフッ素
樹脂等からなる離型層を形成するのが好ましい。For the peripheral surface (peripheral wall) of the endless rotating body,
A resistance heating element that generates heat when energized is formed. The resistance heating element is formed on the outer peripheral surface or the inner peripheral surface of the endless rotating body, or on both of them. Even if the resistance heating element is formed directly on the peripheral surface of the endless rotating element, it is indirectly connected to the endless rotating element via an insulator to maintain electrical insulation between the endless rotating element and the resistance heating element. It may be formed on the peripheral surface of the rotator. The resistance heating element formed on the peripheral surface of the endless rotator that rotates the peripheral surface rotates integrally with the peripheral surface of the endless rotator. It is preferable to form a release layer made of a fluororesin or the like on the outermost peripheral surface of the endless rotating body to prevent the adhesion of the molten toner.
【００１３】かかる抵抗発熱体には、無端状回転体の中
空内部に設けた受電部材が電気的に接続している。受電
部材はその一部が無端状回転体の外部に突出していても
よい。受電部材は、導電性材料からなる。受電部材は無
端状回転体の周面回転移動に伴い、無端状回転体と一体
的に回転する。加熱装置においては、受電部材には給電
部材が接触している。かかる給電部材は導電性材料から
なり、受電部材と給電部材との間の電気的な接続が図ら
れている。給電部材には、電源が接続される。給電部材
は直接電源に接続しても、スイッチ、リレーの接点等を
介して間接的に電源に接続してもよい。A power receiving member provided inside the hollow endless rotating body is electrically connected to the resistance heating element. A part of the power receiving member may protrude outside the endless rotating body. The power receiving member is made of a conductive material. The power receiving member rotates integrally with the endless rotator along with the circumferential rotation of the endless rotator. In the heating device, the power receiving member is in contact with the power receiving member. The power supply member is made of a conductive material, and electrical connection between the power reception member and the power supply member is achieved. A power supply is connected to the power supply member. The power supply member may be directly connected to the power supply, or may be indirectly connected to the power supply via a switch, a contact point of a relay, or the like.
【００１４】加熱装置は、上記受電部材と給電部材とを
少なくとも一つずつ備えている。加熱装置には、上記受
電部材と給電部材とを一対ずつ設けてもよい。加熱装置
には、上記受電部材と給電部材とを一つずつと、従来か
ら知られた受電部材と給電部材とを一つずつとを設けて
もよい。加熱回転体も同様に、上記受電部材を少なくと
も一つ備えている。The heating device includes at least one of the power receiving member and the power supply member. The heating device may be provided with a pair of the power receiving member and the power feeding member. The heating device may be provided with one power receiving member and one power feeding member, and one conventionally known power receiving member and one power feeding member. Similarly, the heating rotator includes at least one power receiving member.
【００１５】受電部材には、給電部材との電気的な接続
機能の他、無端状回転体の剛性を高めたり、その形状を
保持するためなどの内部構造部材としての機能を持たせ
てもよい。例えば、無端状回転体を中空円筒状のローラ
とする場合において、熱容量を下げるなどのために該ロ
ーラを薄肉にして該ローラの剛性が低くなるときには、
ローラの中空内部に設ける受電部材に該ローラの形状、
剛性を保持、維持させる機能を持たせてもよい。無端状
回転体を無端状のフィルム等で構成するときには、該フ
ィルム等を所定の形状に保持する機能を、該フィルムの
中空内部に設ける受電部材に持たせてもよい。[0015] The power receiving member may have a function as an internal structural member for increasing the rigidity of the endless rotating body or maintaining its shape, in addition to the function of electrical connection with the power feeding member. . For example, when the endless rotating body is a hollow cylindrical roller, when the rigidity of the roller is reduced by reducing the thickness of the roller to reduce the heat capacity,
The shape of the roller, the power receiving member provided inside the hollow of the roller,
A function for maintaining and maintaining rigidity may be provided. When the endless rotating body is formed of an endless film or the like, a function of holding the film or the like in a predetermined shape may be provided to a power receiving member provided inside the hollow of the film.
【００１６】受電部材は、例えば無端状回転体の内部仕
切り壁状に、該無端状回転体の回転軸線方向の外側に向
け露出させて設けてもよい。このように、受電部材を無
端状回転体の中空内部において、その中空内部を仕切る
壁状に設けると、かかる受電部材には無端状回転体の剛
性などを高める機能を持たせることができる。これによ
り、無端状回転体の形状、寸法等の保持性を高めること
ができる。この場合には、給電部材は受電部材の露出し
ている部分に無端状回転体の回転軸線方向の外側から接
触させればよい。The power receiving member may be provided, for example, on the inner partition wall of the endless rotating body so as to be exposed outward in the direction of the rotation axis of the endless rotating body. As described above, when the power receiving member is provided in the hollow interior of the endless rotary body in the shape of a wall partitioning the hollow interior, the power receiving member can have a function of increasing the rigidity of the endless rotary body. Thereby, the retention of the shape, dimensions and the like of the endless rotating body can be improved. In this case, the power supply member may be brought into contact with the exposed portion of the power receiving member from the outside in the rotation axis direction of the endless rotating body.
【００１７】また、受電部材は無端状回転体の中空内周
面にリング状に設けてもよい。この場合には、給電部材
は該受電部材に該無端状回転体の中空内部において接触
させればよい。給電部材は、例えば無端状回転体の回転
軸線方向を横切る方向（代表的には、該回転軸線方向と
ほぼ直交する方向）から受電部材に接触させてもよい。
給電部材は、無端状回転体の回転軸線方向外側から受電
部材に接触させることもできる。Further, the power receiving member may be provided in a ring shape on the hollow inner peripheral surface of the endless rotating body. In this case, the power supply member may be brought into contact with the power receiving member in the hollow interior of the endless rotating body. The power supply member may be brought into contact with the power receiving member from, for example, a direction transverse to the rotation axis direction of the endless rotating body (typically, a direction substantially orthogonal to the rotation axis direction).
The power supply member can also be brought into contact with the power receiving member from outside of the endless rotating body in the rotation axis direction.
【００１８】加熱装置においては、給電部材を受電部材
に向けて押圧する押圧装置を設けると、回転する受電部
材に対して給電部材を安定して接触させることができ
る。かかる押圧装置としては、給電部材を受電部材へ向
けて押すコイルバネ等の弾性体を含んでいるものを例示
できる。加熱装置においては、受電部材の給電部材との
接触のための面の面積を、給電部材の受電部材との接触
のための面の面積より大きくすると、次の不具合の発生
を抑制できる。無端状回転体と一体的に回転する受電部
材とこれに当接する給電部材とを有する加熱装置におい
て、特に、給電部材がコイルバネ等により受電部材に向
けて押圧されているような場合には、無端状回転体の周
面を回転移動させるように該回転体を回転させたとき
に、給電部材が受電部材からずれてしまうことがある。
かかるずれが発生すると、給電部材は偏摩耗し、給電部
材の寿命が極端に短くなってしまう。また、給電部材が
偏摩耗すると、給電部材と受電部材との接触面の面積が
それだけ小さくなり、電流の集中する部分ができたり、
接触抵抗が大きくなったりする。さらに、給電部材が受
電部材に片当たりしたり、点接触したりするようにな
り、受電部材に対して給電部材が飛び跳ねたり（ジャン
ピング）して、電気ノイズが発生するようなこともあ
る。このような不具合は、上記のように受電部材の給電
部材との接触のための面の面積を、給電部材の受電部材
との接触のための面の面積より大きくしておき、さらに
好ましくは、給電部材の受電部材との接触のための面
が、受電部材の給電部材との接触のための面の外輪郭内
のほぼ中央部に接触するように給電部材を配置すること
によって抑制できる。すなわち、このようにすると、無
端状回転体が回転されて、給電部材の受電部材との接触
のための面が、受電部材に対する所定位置から若干ずれ
るようなことがあっても、かかるずれによる給電部材の
受電部材との接触のための面の移動は、受電部材の給電
部材との接触のための面の外輪郭内にとどまらせること
ができ、該外輪郭からはずれて給電部材が偏摩耗するこ
とを防止できる。また、給電部材が偏摩耗することによ
り発生する前述の給電部材の寿命の低下、接触抵抗の増
大、給電部材のジャンピング等の不具合も抑制できる。In the heating device, if a pressing device for pressing the power feeding member toward the power receiving member is provided, the power feeding member can be stably brought into contact with the rotating power receiving member. As such a pressing device, a device including an elastic body such as a coil spring for pressing the power supply member toward the power receiving member can be exemplified. In the heating device, if the area of the surface of the power receiving member for contact with the power receiving member is made larger than the area of the surface of the power feeding member for contact with the power receiving member, occurrence of the following problems can be suppressed. In a heating device having a power receiving member that rotates integrally with the endless rotating body and a power supply member that comes into contact with the power receiving member, particularly when the power supply member is pressed toward the power receiving member by a coil spring or the like, the endless When the rotating body is rotated so as to rotate the peripheral surface of the rotary body, the power supply member may be displaced from the power receiving member.
When such a shift occurs, the power supply member is worn unevenly, and the life of the power supply member is extremely shortened. Further, when the power supply member is unevenly worn, the area of the contact surface between the power supply member and the power receiving member is reduced accordingly, and a portion where current concentrates is formed,
Contact resistance may increase. Further, the power supply member may come into contact with the power reception member or make a point contact, and the power supply member may jump (jump) with respect to the power reception member, thereby generating electric noise. Such a disadvantage is that the area of the surface of the power receiving member for contact with the power supply member is set to be larger than the area of the surface of the power supply member for contact with the power reception member, and more preferably, The power supply member can be suppressed by arranging the power supply member such that the surface of the power supply member for contact with the power receiving member contacts substantially the center of the outer contour of the surface of the power reception member for contact with the power supply member. In other words, even if the endless rotating body is rotated in this way, the surface of the power supply member for contact with the power receiving member may slightly deviate from a predetermined position with respect to the power receiving member. The movement of the surface of the member for contact with the power receiving member can be kept within the outer contour of the surface of the power receiving member for contact with the power supply member, and the power supply member deviates from the outer contour and wears unevenly. Can be prevented. In addition, it is possible to suppress problems such as a reduction in the life of the power supply member, an increase in contact resistance, and jumping of the power supply member caused by uneven wear of the power supply member.
【００１９】無端状回転体がローラである場合の本発明
の加熱装置及び加熱回転体の形態として、次のものを挙
げることができる。すなわち、少なくとも一部が中空の
円筒状の芯ローラと、前記芯ローラの外周面及び（又
は）内周面に沿って形成されて該芯ローラと共に回転
し、通電により発熱する抵抗発熱体と、前記抵抗発熱体
に電気的に接続され、前記芯ローラの中空内部に設けら
れ、該芯ローラと共に回転する一対の受電部材と、前記
各受電部材にそれぞれ当接する一対の給電部材とを備え
る加熱装置（加熱ローラ装置）、及び少なくとも一部が
中空の円筒状の芯ローラと、前記芯ローラの外周面及び
（又は）内周面に沿って形成されて該芯ローラと共に回
転し、通電により発熱する抵抗発熱体と、前記抵抗発熱
体に電気的に接続され、前記芯ローラの中空内部に設け
られ、該芯ローラと共に回転する一対の受電部材とを備
える加熱回転体（加熱ローラ）である。When the endless rotating body is a roller, the following are examples of the heating device and the heating rotating body according to the present invention. That is, at least a part of a hollow cylindrical core roller, a resistance heating element formed along the outer peripheral surface and / or the inner peripheral surface of the core roller, rotating together with the core roller, and generating heat when energized, A heating device that is electrically connected to the resistance heating element, is provided inside the hollow of the core roller, and includes a pair of power receiving members that rotate with the core roller, and a pair of power supply members that respectively contact the power receiving members. (A heating roller device), and a core roller having a hollow cylindrical shape, at least a part of which is formed along the outer peripheral surface and / or the inner peripheral surface of the core roller, rotates together with the core roller, and generates heat by energization. A heating rotator (heating roller) including a resistance heating element and a pair of power receiving members electrically connected to the resistance heating element, provided inside the hollow of the core roller, and rotating with the core roller.
【００２０】上記加熱ローラ装置及び加熱ローラにおい
ては、前述のように受電部材、給電部材は次のように設
けてもよい。受電部材は、例えば芯ローラの回転中心軸
線方向の端部において、回転中心軸線方向の外側に向け
て露出させて、芯ローラの中空内部に内部仕切り壁状に
設けてもよい。この場合には、給電部材は受電部材に、
該芯ローラ回転中心軸線方向外側から当接させればよ
い。In the heating roller device and the heating roller described above, the power receiving member and the power supply member may be provided as described above. The power receiving member may be provided in the form of an internal partition wall in the hollow inside of the core roller, for example, exposed at the end of the core roller in the rotation axis direction toward the outside in the rotation axis direction. In this case, the power supply member is a power receiving member,
What is necessary is just to make it contact from the outer side of the core roller rotation center axis direction.
【００２１】受電部材は、芯ローラの内周面にリング状
に形成してもよい。この場合には、給電部材は受電部材
に、その内周側から当接させればよい。加熱ローラ装置
においては、前述のように給電部材を受電部材に向けて
押圧するためのコイルバネ等の弾性体を含む押圧装置を
設けてもよい。受電部材の給電部材との接触のための面
の面積を、給電部材の受電部材との接触のための面の面
積より大きくし、さらに好ましくは、給電部材の受電部
材との接触のための面が、受電部材の給電部材との接触
のための面の外輪郭内のほぼ中央部に接触するように給
電部材を配置すれば、前述のように給電部材の偏摩耗な
どを抑制することができる。The power receiving member may be formed in a ring shape on the inner peripheral surface of the core roller. In this case, the power supply member may be brought into contact with the power receiving member from the inner peripheral side thereof. In the heating roller device, as described above, a pressing device including an elastic body such as a coil spring for pressing the power supply member toward the power receiving member may be provided. The area of the surface of the power receiving member for contact with the power supply member is larger than the area of the surface of the power supply member for contact with the power reception member, and more preferably, the surface of the power supply member for contact with the power reception member. However, if the power supply member is arranged so as to be in contact with a substantially central portion of the outer contour of the surface for contact with the power supply member of the power reception member, uneven wear of the power supply member can be suppressed as described above. .
【００２２】[0022]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図１に、本発明に係る加熱装置を
備える定着装置の一例の概略断面図を示す。かかる加熱
装置は、本発明に係る加熱回転体を有している。この定
着装置は、プリンタ、複写機等の電子写真方式の画像形
成装置に搭載して、未定着のトナー像を保持するシート
状記録材に、該トナー像を加熱及び加圧して定着させる
ことに利用できる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view of an example of a fixing device provided with a heating device according to the present invention. Such a heating device has the heating rotator according to the present invention. The fixing device is mounted on an electrophotographic image forming apparatus such as a printer or a copying machine, and is heated and pressed to fix the toner image on a sheet-shaped recording material holding an unfixed toner image. Available.
【００２３】この定着装置は、加熱回転体である加熱ロ
ーラ１等を含む加熱装置（加熱ローラ装置）及び加熱ロ
ーラ１に対向する加圧ローラ２を備えている。加熱ロー
ラ１は無端状回転体として中空円筒状の芯ローラ１０を
有し、その両端部において軸受け３１、３１により回転
可能に支持されている。図中左側の軸受け３１は定着装
置ハウジングＨに支持されている。左側軸受け３１の外
側面には、芯ローラ１０の外周面上の全周にわたり形成
された溝１０４に嵌着されたｃリング３１１が当接して
おり、これにより左側軸受け３１がハウジングＨとの間
に位置決めされているとともに左側軸受け３１に対し加
熱ローラ１が位置決めされている。This fixing device includes a heating device (heating roller device) including a heating roller 1 or the like, which is a heating rotator, and a pressure roller 2 facing the heating roller 1. The heating roller 1 has a hollow cylindrical core roller 10 as an endless rotating body, and is rotatably supported at both ends by bearings 31, 31. The bearing 31 on the left side in the figure is supported by the fixing device housing H. The outer surface of the left bearing 31 is in contact with a c-ring 311 fitted in a groove 104 formed over the entire outer peripheral surface of the core roller 10, so that the left bearing 31 is in contact with the housing H. And the heating roller 1 is positioned with respect to the left bearing 31.
【００２４】図中右側の軸受け３１もハウジングＨに支
持されている。右側軸受け３１の外側面には、芯ローラ
１０に嵌着されたリングギア１４が当接している。ギア
１４の外側端には、芯ローラ１０の外周面上の全周にわ
たり形成された溝１０４に嵌着されたｃリング３１１が
当接しており、これにより右側軸受け３１はハウジング
Ｈとリングギア１４との間で位置決めされているととも
に、右側軸受け３１に対し加熱ローラ１が位置決めされ
ている。The right bearing 31 in the figure is also supported by the housing H. The ring gear 14 fitted to the core roller 10 is in contact with the outer side surface of the right bearing 31. The outer end of the gear 14 is in contact with a c-ring 311 fitted in a groove 104 formed over the entire outer peripheral surface of the core roller 10, whereby the right bearing 31 is connected to the housing H and the ring gear 14. The heating roller 1 is positioned with respect to the right bearing 31.
【００２５】リングギア１４はギア列（図示省略）を介
してモータ（図示省略）に連結されており、かかるモー
タを駆動することによって加熱ローラ１を回転駆動する
ことができる。加熱ローラ１が回転駆動されると、その
外周面は回転移動する。加圧ローラ２は、その両端部に
設けられた軸２１が支持部材３２により回転可能に支持
されており、また、支持部材３２に一方向から接するバ
ネ３２１により加熱ローラ１に向けて押圧されている。
加圧ローラ２は、加熱ローラ１の回転に従動して、或い
は、両ローラの間に通される記録材の移動に従動して回
転する。The ring gear 14 is connected to a motor (not shown) through a gear train (not shown), and the heating roller 1 can be driven to rotate by driving the motor. When the heating roller 1 is driven to rotate, the outer peripheral surface rotates. The pressure roller 2 has shafts 21 provided at both ends thereof rotatably supported by a support member 32, and is pressed toward the heating roller 1 by a spring 321 that contacts the support member 32 from one direction. I have.
The pressure roller 2 rotates following the rotation of the heating roller 1 or following the movement of the recording material passed between the rollers.
【００２６】前記無端状回転体である芯ローラ１０は、
本例では、アルミニウム合金製のものである。芯ローラ
１０の内周面には、絶縁層１１、層状の抵抗発熱体（以
下、抵抗発熱層という。）１２が順に形成されており、
また、外周面には離型層１３が形成されている。絶縁層
１１は、抵抗発熱層１２と芯ローラ１０との間の電気絶
縁性を保つために、両者の間に形成されており、本例で
は耐熱絶縁性樹脂のポリイミドからなる。The core roller 10, which is the endless rotating body,
In the present example, it is made of an aluminum alloy. An insulating layer 11 and a layered resistance heating element (hereinafter referred to as a resistance heating layer) 12 are sequentially formed on the inner peripheral surface of the core roller 10.
Further, a release layer 13 is formed on the outer peripheral surface. The insulating layer 11 is formed between the resistance heating layer 12 and the core roller 10 in order to maintain electrical insulation between them. In this example, the insulating layer 11 is made of a heat-resistant insulating resin polyimide.
【００２７】抵抗発熱層１２は、通電により自らジュー
ル発熱をし、本例ではチタン酸バリウム系セラミックか
らなる。離型層１３は、未定着のトナー像を保持する記
録材が加熱ローラ１とこれに対向する加圧ローラ２との
間に挟持されつつ通過するときに、加熱されるトナー像
が加熱ローラ１から剥がれやすくするために形成されて
おり、本例ではポリテトラフルオロエチレンからなる。The resistance heating layer 12 generates Joule heat by energization itself, and in this embodiment is made of barium titanate ceramic. When the recording material holding the unfixed toner image passes while being held between the heating roller 1 and the pressure roller 2 opposed thereto, the release layer 13 removes the heated toner image from the heating roller 1. It is formed so as to be easily peeled off, and in this example, is made of polytetrafluoroethylene.
【００２８】これら絶縁層１１、抵抗発熱層１２及び離
型層１３は芯ローラ１０と一体的に回転する。加熱ロー
ラ１の回転中心軸線方向の両端部であって加熱ローラ１
の中空内部には、それぞれ導電性材料からなる受電部材
１５が装着されている。それには限定されないが、ここ
では芯ローラ１０の内周面側に嵌装されている。受電部
材１５は、本例では真鍮からなる。各受電部材１５は、
芯ローラ１０の回転中心軸線方向の両端部において外側
へ向け露出している。各受電部材１５は、ローラ１の回
転中心軸線と中心線を一致させた平坦円形頂面１５２を
有するハット形状のものであり、芯ローラ１０の中空内
部を仕切る壁状に芯ローラ１０の両端部に設けられてい
る。各受電部材１５は芯ローラ１０の剛性を高め、その
形状を保持する機能も有している。各受電部材１５は抵
抗発熱層１２に導電性接着剤にて接着固定され、該発熱
層１２に電気的に接続されている。受電部材１５は、芯
ローラ１０と一体的に回転する。The insulating layer 11, the resistance heating layer 12, and the release layer 13 rotate integrally with the core roller 10. At both ends of the heating roller 1 in the rotation center axis direction, the heating roller 1
Power receiving members 15 each made of a conductive material are mounted in the hollow interiors. Although not limited to this, it is fitted on the inner peripheral surface side of the core roller 10 here. The power receiving member 15 is made of brass in this example. Each power receiving member 15
Both ends of the core roller 10 in the rotation center axis direction are exposed outward. Each power receiving member 15 is a hat-shaped member having a flat circular top surface 152 whose center line coincides with the rotation center axis of the roller 1, and has both ends of the core roller 10 in a wall shape partitioning the hollow interior of the core roller 10. It is provided in. Each power receiving member 15 also has the function of increasing the rigidity of the core roller 10 and maintaining its shape. Each power receiving member 15 is bonded and fixed to the resistance heating layer 12 with a conductive adhesive, and is electrically connected to the heating layer 12. The power receiving member 15 rotates integrally with the core roller 10.
【００２９】加熱ローラ１の回転中心軸線方向の両端部
に露出させておいた各受電部材１５の平坦頂面１５２に
は、加熱ローラ１の回転中心軸線方向外側から導電性材
料からなる給電部材１６の面１６３がそれぞれ面接触し
ている。給電部材１６は、本例では銅系カーボンからな
る。図１中左側の給電部材１６は、ハウジングＨにネジ
Ｓ１によりネジ留めされた樹脂製ホルダー４１に設けた
凹所４１１に嵌入されて、該凹所４１１のローラ１側に
設けた孔４１１ａから一部突出して受電部材１５に臨
み、前記凹所４１１に嵌装したバネ１６１にて受電部材
１５に適圧下に接触している。また、右側の給電部材１
６もハウジングＨにネジＳ１によりネジ留めされた右側
樹脂製ホルダー４２の凹所４２１に嵌入されて、ホルダ
ー孔４２１ａから一部突出して右側受電部材１５に臨
み、該凹所４２１に嵌められたバネ１６１にて右側受電
部材１５に適圧下に接触している。各バネ１６１はホル
ダー外端部にネジＳ２によりネジ留めした端子板３３、
３３にて外端を支持されている。かくして、受電部材１
５が加熱ローラ１と一体的に回転しても受電部材１５と
給電部材１６との電気的接続が保たれるようになってい
る。On the flat top surface 152 of each power receiving member 15 exposed at both ends of the heating roller 1 in the rotation center axis direction, a power supply member 16 made of a conductive material from the outside of the heating roller 1 in the rotation center axis direction. Are in surface contact with each other. The power supply member 16 is made of copper-based carbon in this example. The power supply member 16 on the left side in FIG. 1 is fitted into a recess 411 provided in a resin holder 41 screwed to the housing H with a screw S1 and is inserted through a hole 411a provided on the roller 1 side of the recess 411. The protrusion 161 faces the power receiving member 15 and is in contact with the power receiving member 15 under a suitable pressure by a spring 161 fitted in the recess 411. Also, the right power supply member 1
6 is also fitted into the recess 421 of the right resin holder 42 screwed to the housing H with the screw S1, partially protrudes from the holder hole 421a, faces the right power receiving member 15, and is fitted into the recess 421. At 161, it contacts the right power receiving member 15 under an appropriate pressure. Each spring 161 has a terminal plate 33 screwed to the outer end of the holder with a screw S2,
The outer end is supported at 33. Thus, the power receiving member 1
Even if the roller 5 rotates integrally with the heating roller 1, the electrical connection between the power receiving member 15 and the power supply member 16 is maintained.
【００３０】各給電部材１６はリード線１６２によりそ
れぞれ導電性材料からなる端子板３３に電気的に接続さ
れている。左側端子板３３には、電源８（図２参照）の
一端に接続され、その端部に圧着端子３４１をかしめら
れた電線３４が、該圧着端子３４１をネジＳ３により締
結されて接続されている。同様に、右側端子板３３に
は、ソリッド・ステート・リレーＳＳＲ（図２参照）の
接点を介して電源８の他端に接続され、その端部に圧着
端子３４１をかしめられた電線３４が、該圧着端子３４
１をネジＳ３により締結されて接続している。各ネジＳ
３の端子板３３から飛び出た首下部Ｓ３１は、バネ１６
１の中央空芯部に嵌まり込んでいる。Each power supply member 16 is electrically connected to a terminal plate 33 made of a conductive material by a lead wire 162. The left terminal plate 33 is connected to one end of the power supply 8 (see FIG. 2), and an electric wire 34 having a crimp terminal 341 caulked at the end thereof is connected to the crimp terminal 341 by fastening the screw S3. . Similarly, an electric wire 34 connected to the other end of the power supply 8 via a contact of a solid state relay SSR (see FIG. 2) and having a crimp terminal 341 at the end is connected to the right terminal plate 33. The crimp terminal 34
1 are connected by being fastened with a screw S3. Each screw S
The lower part S31 of the neck protruding from the terminal board 33 of the third
1 is fitted into the central air core.
【００３１】ここで、前記受電部材１５及び給電部材１
６についてさらに説明する。受電部材１５の給電部材１
６との接触のために設けられた面の面積、本例では平坦
円形頂面１５２の面積は、給電部材１６の受電部材１５
との接触のために設けられた面の面積、本例では円形面
１６３の面積より大きく形成してある。なお、本例で
は、受電部材１５の円形頂面１５２の直径は１０ｍｍで
あり、給電部材１６の円形面１６３の直径は８ｍｍであ
る。また、給電部材１６は、その受電部材１５との接触
のための面１６３の中心を、受電部材１５の頂面１５２
の中心に合わせるように配置されている。これらによ
り、給電部材１６の受電部材１５との接触のための面１
６３は、受電部材１５の給電部材１６との接触のための
面１５２の外輪郭の内側で、そのほぼ中央において該面
１５２に面接触している。Here, the power receiving member 15 and the power feeding member 1
No. 6 will be further described. Power supply member 1 of power reception member 15
6, the area of the flat circular top surface 152 in this example is the power receiving member 15 of the power supply member 16.
In this example, the area is provided to be larger than the area of the circular surface 163 provided for contact with the surface. In this example, the diameter of the circular top surface 152 of the power receiving member 15 is 10 mm, and the diameter of the circular surface 163 of the power supply member 16 is 8 mm. The power supply member 16 is arranged such that the center of the surface 163 for contact with the power reception member 15 is positioned on the top surface 152 of the power reception member 15.
It is arranged to match the center of. Thus, the surface 1 for contact of the power supply member 16 with the power receiving member 15 is formed.
63 is inside the outer contour of the surface 152 for contact with the power supply member 16 of the power receiving member 15, and is in surface contact with the surface 152 at substantially the center thereof.
【００３２】図２に抵抗発熱層１２への通電回路の概略
図を、その通電制御を行う制御部とともに示す。なお、
図２においては、受電部材１５、給電部材１６、リード
線１６２等は図示を省略してある。抵抗発熱層１２に
は、リレーＳＳＲの接点を閉じることにより電源８から
通電することができる。リレーＳＳＲには、定着装置全
体の動作制御を行う中央演算装置（ＣＰＵ）を含む制御
部ＣＴＲが接続されており、制御部ＣＴＲによりリレー
ＳＳＲの接点は開閉される。制御部ＣＴＲは、加熱ロー
ラ１の離型層１３の外周面上に当接された温度検出素子
であるサーミスタＴＨ（図１においては、図示を省略）
の検出する加熱ローラ１の温度に基づいて、リレーＳＳ
Ｒの接点の開閉を行う。サーミスタＴＨの検出する加熱
ローラ１の温度に基づき、制御部ＣＴＲは抵抗発熱層１
２への通電制御を行い、加熱ローラ１を所定の温度に制
御する。FIG. 2 is a schematic diagram of a circuit for energizing the resistance heating layer 12, together with a control unit for controlling the energization. In addition,
2, the power receiving member 15, the power feeding member 16, the lead wire 162, and the like are not shown. The resistance heating layer 12 can be energized from the power supply 8 by closing the contact of the relay SSR. The control unit CTR including a central processing unit (CPU) that controls the operation of the entire fixing device is connected to the relay SSR, and the contact of the relay SSR is opened and closed by the control unit CTR. The control unit CTR is a thermistor TH (not shown in FIG. 1) which is a temperature detecting element abutting on the outer peripheral surface of the release layer 13 of the heating roller 1.
Based on the temperature of the heating roller 1 detected by the relay SS
Open / close the R contact. Based on the temperature of the heating roller 1 detected by the thermistor TH, the control unit CTR
2 is controlled to control the heating roller 1 to a predetermined temperature.
【００３３】なお、加熱ローラ１の温度制御のための上
記サーミスタＴＨとは別に、加熱ローラ１の異常昇温防
止のための温度検出素子を設けてもよい。該温度検出素
子が検出する温度に基づき開閉する安全スイッチを、図
２に示す抵抗発熱層１２への通電回路に電源８やリレー
ＳＳＲと直列に接続すれば、何らかの原因により制御部
ＣＴＲによる通電制御が正常に動作せず、加熱ローラ１
が異常昇温するようなときにも、該安全スイッチにより
加熱ローラ１やその周辺部品が熱的損傷を受ける前に通
電回路を遮断することができる。該温度検出素子も、加
熱ローラ１の外周面上に当接して設ければよい。該温度
検出素子としては、例えばサーミスタや熱電対を採用す
ることができ、また、温度検出機能を備える安全スイッ
チとして、例えば温度ヒューズやサーモスタットを採用
することができる。In addition to the thermistor TH for controlling the temperature of the heating roller 1, a temperature detecting element for preventing abnormal heating of the heating roller 1 may be provided. If a safety switch that opens and closes based on the temperature detected by the temperature detecting element is connected in series with the power supply 8 and the relay SSR to the power supply circuit to the resistance heating layer 12 shown in FIG. Does not work properly and the heating roller 1
Even when the temperature rises abnormally, the safety switch can shut off the power supply circuit before the heating roller 1 and its peripheral parts are thermally damaged. The temperature detecting element may be provided in contact with the outer peripheral surface of the heating roller 1. As the temperature detecting element, for example, a thermistor or a thermocouple can be adopted, and as a safety switch having a temperature detecting function, for example, a temperature fuse or a thermostat can be adopted.
【００３４】以上説明した定着装置によると、未定着の
トナー像を保持した記録材上へのトナー像の定着は次の
ようにして行われる。すなわち、制御部ＣＴＲによりリ
レーＳＳＲの接点が閉じられて、給電部材１６や受電部
材１５等を介して抵抗発熱層１２に電源８から通電さ
れ、これにより抵抗発熱層１２はジュール発熱して、加
熱ローラ１がその内周面側から加熱される。加熱ローラ
１の加熱源として抵抗発熱体を採用したことにより、加
熱ローラ１は速やかに昇温する。このとき、サーミスタ
ＴＨの検出する加熱ローラ１の温度に基づいて通電制御
が行われ、加熱ローラ１は所定の定着温度に保たれる。
そして、図示しないモータにより該モータに連結された
ギア列を介して加熱ローラ１が回転駆動され、定着温度
の加熱ローラ１とこれに押圧する加圧ローラ２との間
を、記録材が通されることにより、該記録材上の未定着
トナー像が加熱、加圧下に記録材に定着される。According to the fixing device described above, the fixing of the toner image on the recording material holding the unfixed toner image is performed as follows. That is, the contact of the relay SSR is closed by the control unit CTR, and power is supplied to the resistance heating layer 12 from the power supply 8 via the power supply member 16 and the power reception member 15, whereby the resistance heating layer 12 generates Joule heat and is heated. The roller 1 is heated from the inner peripheral surface side. By using a resistance heating element as a heating source of the heating roller 1, the temperature of the heating roller 1 quickly rises. At this time, energization control is performed based on the temperature of the heating roller 1 detected by the thermistor TH, and the heating roller 1 is maintained at a predetermined fixing temperature.
Then, the heating roller 1 is driven to rotate by a motor (not shown) via a gear train connected to the motor, and the recording material is passed between the heating roller 1 having a fixing temperature and the pressing roller 2 pressing the heating roller 1. Thus, the unfixed toner image on the recording material is fixed on the recording material under heating and pressure.
【００３５】本発明の加熱ローラ装置においては、画像
定着時等において加熱ローラ１が回転駆動されて、給電
部材１６に対して受電部材１５が摺動するときに、給電
部材１６の面１６３の中心が、図３に示すように受電部
材１５の面１５２の中心から若干ずれるようなことがあ
っても、次の理由により給電部材１６の偏摩耗などを防
止することができる。なお、図３においては、左側給電
部材１６がずれている様子を示している。前述のよう
に、本発明の加熱ローラ装置においては、受電部材１５
の面１５２の面積を給電部材１６の面１６３の面積より
も大きくしているため、換言すると、本例においては受
電部材１５の面１５２の外輪郭は給電部材１６の面１６
３の外輪郭より大きいため、給電部材１６の面１６３の
中心が受電部材１５の面１５２の中心から若干ずれるよ
うなことがあっても、給電部材１６の面１６３は受電部
材１５の面１５２の外輪郭の内側においてずれるだけに
とどまる。また、給電部材１６の面１６３は、初期の段
階においては受電部材１５の面１５２のほぼ中央部に接
触するように配置されているため、給電部材１６が受電
部材１５に対していずれの方向にずれても、面１６３の
外輪郭から面１５２の外輪郭までの距離はある一定の距
離だけ確保されていて、それだけ給電部材の面１６３が
受電部材１５の面１５２の外輪郭の外にまで外れること
が抑制されている。これにより、給電部材１６の偏摩耗
を防止することができる。給電部材１６を受電部材１５
に臨ませるために設けたホルダー孔４１１ａ、４２１ａ
によっても、給電部材１６の面１６３が受電部材１５の
面１５２の外輪郭の外側にまで移動することが抑制され
ている。したがって、それだけ給電部材１６の寿命を長
くできる。また、給電部材１６のジャンピングによる電
気ノイズも低減できる。In the heating roller device according to the present invention, when the heating roller 1 is driven to rotate at the time of fixing an image and the power receiving member 15 slides with respect to the power feeding member 16, the center of the surface 163 of the power feeding member 16 is adjusted. However, even if the power supply member 15 slightly deviates from the center of the surface 152 of the power reception member 15 as shown in FIG. 3, uneven wear of the power supply member 16 can be prevented for the following reasons. FIG. 3 shows a state where the left power supply member 16 is shifted. As described above, in the heating roller device of the present invention, the power receiving member 15
Since the area of the surface 152 of the power supply member 16 is larger than the area of the surface 163 of the power supply member 16, in other words, in this example, the outer contour of the surface 152 of the power reception member 15 is
3, the center of the surface 163 of the power supply member 16 may be slightly deviated from the center of the surface 152 of the power receiving member 15. It only shifts inside the outer contour. In addition, since the surface 163 of the power supply member 16 is arranged so as to be in contact with the substantially central portion of the surface 152 of the power reception member 15 in the initial stage, the power supply member 16 can be moved in any direction with respect to the power reception member 15. Even if it is shifted, the distance from the outer contour of the surface 163 to the outer contour of the surface 152 is secured by a certain distance, and the surface 163 of the power supply member is deviated to the outside of the outer contour of the surface 152 of the power receiving member 15 accordingly. That has been suppressed. Thereby, uneven wear of the power supply member 16 can be prevented. The power supply member 16 is connected to the power reception member 15
Holes 411a, 421a provided to face
Accordingly, the movement of the surface 163 of the power supply member 16 to the outside of the outer contour of the surface 152 of the power reception member 15 is suppressed. Therefore, the life of the power supply member 16 can be prolonged accordingly. Further, electric noise due to jumping of the power supply member 16 can be reduced.
【００３６】また、芯ローラの外周面に設けられたリン
グ状の受電部材と、受電部材の外周面側から接する給電
部材とを備えた従来の加熱ローラ装置に比べて、本発明
の加熱ローラ装置は、受電部材の給電部材に対する摺動
速度が遅いため、給電部材と受電部材との接触が途切れ
るジャンピング現象や、これら部材の温度上昇に伴う劣
化を抑制できる。Further, the heating roller device of the present invention is compared with a conventional heating roller device having a ring-shaped power receiving member provided on the outer peripheral surface of the core roller and a power supply member contacting from the outer peripheral surface side of the power receiving member. Since the sliding speed of the power receiving member with respect to the power supply member is low, it is possible to suppress a jumping phenomenon in which the contact between the power supply member and the power reception member is interrupted, and a deterioration due to a temperature rise of these members.
【００３７】図１に示す加熱ローラ装置においては、次
のようにして加熱回転体である加熱ローラ１や、給電部
材１６を取り外すことができる。定着装置を長期にわた
り使用すると、加熱ローラ１は紙等の記録材などにより
その接触面である離型層１３が摩耗したり、傷ついたり
し、定期的に交換する必要がある。加熱ローラ１は、ジ
ャンピングや過昇温によって受電部材１５が、万一熱破
壊してしまった場合にも交換しなければならなくなる。
また、給電部材１６についても受電部材１５との摺動に
より長期間使用すると摩耗するため、定期的に交換する
必要がある。In the heating roller device shown in FIG. 1, the heating roller 1 as the heating rotator and the power supply member 16 can be removed as follows. If the fixing device is used for a long period of time, the release layer 13 which is the contact surface of the heating roller 1 due to a recording material such as paper is worn or damaged, and needs to be replaced periodically. The heating roller 1 must be replaced even if the power receiving member 15 is thermally damaged by jumping or excessive temperature rise.
The power supply member 16 also wears out when used for a long period of time due to sliding with the power receiving member 15, and thus needs to be replaced periodically.
【００３８】図４に示すようにネジＳ１を外すと、ハウ
ジングＨからホルダー４２及びホルダー４２に支持され
ている給電部材１６等を取り外すことができる。さらに
ホルダー４２からネジＳ２を外すと、端子板３３及び端
子板３３に取り付けられている電線３４等をホルダー４
２から取り外すことができる。これにより、図５に示す
ようにリード線１６２が接続している給電部材１６をホ
ルダー４２から取り外すことができる。When the screw S1 is removed as shown in FIG. 4, the holder 42 and the power supply member 16 supported by the holder 42 can be removed from the housing H. When the screw S2 is further removed from the holder 42, the terminal plate 33 and the electric wire 34 attached to the terminal plate 33 are connected to the holder 4.
2 can be removed. Thereby, the power supply member 16 to which the lead wire 162 is connected can be removed from the holder 42 as shown in FIG.
【００３９】また、端子板３３からネジＳ３を外すと、
圧着端子３４１がかしめられた電線３４を端子板３３か
ら取り外すことができる。加熱ローラ１を取り外すとき
には、ネジＳ１を外してハウジングＨからホルダー４２
を取り外してから、さらに図６に示すようにｃリング３
１１を芯ローラ１０から取り外して、リングギア１４及
び軸受け３１を順に芯ローラ１０から抜き取る。このよ
うな作業を加熱ローラ１の両端において行うことによっ
て、図７に示す加熱ローラ１だけを取り出すことができ
る。When the screw S3 is removed from the terminal plate 33,
The electric wire 34 on which the crimp terminal 341 is swaged can be removed from the terminal plate 33. When removing the heating roller 1, the screw S1 is removed and the holder 42 is removed from the housing H.
And then remove the c-ring 3 as shown in FIG.
11 is removed from the core roller 10, and the ring gear 14 and the bearing 31 are sequentially removed from the core roller 10. By performing such operations at both ends of the heating roller 1, only the heating roller 1 shown in FIG. 7 can be taken out.
【００４０】以上説明した加熱ローラ１においては、抵
抗発熱層を芯ローラの内周面に設けたが、芯ローラの外
周面、或いは内外周面に設けてもよい。また、受電部材
は芯ローラの回転中心軸線方向の両端部において該ロー
ラに装着され、給電部材は該回転中心軸線方向外側から
受電部材に当接するものとしたが、受電部材及び給電部
材は図８に示すように設けてもよい。In the heating roller 1 described above, the resistance heating layer is provided on the inner peripheral surface of the core roller, but may be provided on the outer peripheral surface or the inner and outer peripheral surfaces of the core roller. Further, the power receiving member is mounted on the roller at both ends in the rotation center axis direction of the core roller, and the power supply member is in contact with the power reception member from the outside in the rotation center axis direction. May be provided as shown in FIG.
【００４１】図８に示す加熱ローラ１′は中空円筒状の
芯ローラ１０を有し、芯ローラ１０の内周面には絶縁層
１１、抵抗発熱層１２が順に形成されており、また、芯
ローラ１０の外周面には離型層１３が形成されている。
抵抗発熱層１２の両端部におけるさらに内周面側には、
リング状の受電部材１５′、１５′が設けられ、各受電
部材１５′にはその内周面側から給電部材１６′が受電
部材１５′に向けて図示しない押圧手段により押圧され
て当接している。給電部材１６′は、受電部材１５′の
内周面に沿う円弧状に形成された面１６１′で、受電部
材１５′の内周面に当接している。The heating roller 1 ′ shown in FIG. 8 has a hollow cylindrical core roller 10, and an insulating layer 11 and a resistance heating layer 12 are sequentially formed on the inner peripheral surface of the core roller 10. A release layer 13 is formed on the outer peripheral surface of the roller 10.
On the inner peripheral surface side at both ends of the resistance heating layer 12,
Ring-shaped power receiving members 15 ′ and 15 ′ are provided, and a power feeding member 16 ′ is pressed against the power receiving member 15 ′ by pressing means (not shown) toward the power receiving member 15 ′ from the inner peripheral side thereof. I have. The power supply member 16 ′ is in contact with the inner peripheral surface of the power receiving member 15 ′ at a surface 161 ′ formed in an arc shape along the inner peripheral surface of the power receiving member 15 ′.
【００４２】図８の加熱ローラ装置においては、リング
状受電部材１５′の回転中心軸線方向の幅を給電部材１
６′の該方向の幅よりも大きくして、受電部材１５′の
給電部材１６′との接触のために設けられた面、厳密に
言うと、回転する受電部材１５′のある位置における受
電部材１５′の給電部材１６′との接触に寄与する面
（この面は、受電部材１５′の内周面の一部となる）の
面積を、給電部材１６′の受電部材１５′との接触のた
めに設けられた面１６１′の面積よりも大きくし、且
つ、給電部材１６′の面１６１′を受電部材１５′の該
接触に寄与する面のほぼ中央に配置することによって、
加熱ローラ１′が回転駆動されて給電部材１６′が受電
部材１５′に対して若干ずれるようなことがあっても、
特に、給電部材１６′がローラ回転中心軸線方向に若干
ずれるようなことがあっても、給電部材１６′の面１６
１′は受電部材１５′の該接触に寄与する面の外輪郭内
において移動するだけにとどまり、当初の面接触状態を
保って、給電部材１６′の偏摩耗を防止することができ
る。In the heating roller device shown in FIG. 8, the width of the ring-shaped power receiving member 15 'in the rotation center axis direction is
The surface of the power receiving member 15 'provided for contact with the power supply member 16' is made larger than the width of the power receiving member 6 'in the direction, more specifically, the power receiving member at a certain position of the rotating power receiving member 15'. The area of a surface contributing to the contact of the power supply member 15 ′ with the power supply member 16 ′ (this surface becomes a part of the inner peripheral surface of the power reception member 15 ′) is increased by the area of the contact of the power supply member 16 ′ with the power reception member 15 ′. And the surface 161 'of the power supply member 16' is disposed substantially at the center of the surface of the power receiving member 15 'which contributes to the contact.
Even if the heating roller 1 ′ is driven to rotate and the power supply member 16 ′ is slightly shifted with respect to the power reception member 15 ′,
In particular, even if the power supply member 16 'is slightly displaced in the roller rotation center axis direction, the surface 16 of the power supply member 16'
1 'moves only within the outer contour of the surface of the power receiving member 15' that contributes to the contact, and can maintain the initial surface contact state and prevent uneven wear of the power supply member 16 '.
【００４３】また、図８の加熱ローラ装置においては、
給電部材１６´が芯ローラ１０の中空内部に配置されて
いるため、芯ローラの外周面にリング状に設けられた受
電部材と、該受電部材に外周面側から当接する給電部材
とを備える従来の加熱ローラ装置に比べて、装置全体を
コンパクトにできる。また、受電部材の給電部材に対す
る摺動速度が従来より遅くなるので、ジャンピング現象
などを抑制できる。In the heating roller device shown in FIG.
Since the power supply member 16 ′ is disposed inside the hollow of the core roller 10, the power supply member includes a power receiving member provided in a ring shape on the outer peripheral surface of the core roller and a power supply member contacting the power receiving member from the outer peripheral surface side. In comparison with the heating roller device, the entire device can be made compact. In addition, since the sliding speed of the power receiving member with respect to the power supply member is lower than in the related art, a jumping phenomenon or the like can be suppressed.
【００４４】[0044]
【発明の効果】本発明によると、未定着画像を保持した
記録材に該画像を加熱定着させる定着装置において利用
できる加熱装置であり、周面を回転移動させる回転体に
設けた抵抗発熱体に対して給電するタイプの加熱装置で
あって、構造の多様性をもたらし、構造の選択の幅を広
げることを可能ならしめる加熱装置を提供することがで
きる。According to the present invention, there is provided a heating device which can be used in a fixing device which heats and fixes an unfixed image on a recording material holding the image. It is possible to provide a heating device of a type that supplies electric power to the heating device, and provides a variety of structures and enables a wider selection of structures.
【００４５】また、本発明によると、上記加熱装置のた
めの加熱回転体を提供することができる。Further, according to the present invention, it is possible to provide a heating rotator for the heating device.
【図１】本発明の加熱装置を有する定着装置の１例の概
略断面図である。FIG. 1 is a schematic sectional view of an example of a fixing device having a heating device according to the present invention.
【図２】抵抗発熱層への通電回路及び通電制御を行う制
御回路の概略図である。FIG. 2 is a schematic diagram of an energization circuit for a resistance heating layer and a control circuit for performing energization control.
【図３】図１の定着装置が有する加熱装置において、給
電部材が受電部材に対してずれている様子を示す図であ
る。FIG. 3 is a diagram illustrating a state in which a power supply member is displaced from a power receiving member in the heating device included in the fixing device of FIG. 1;
【図４】図１の定着装置が有する加熱装置において、給
電部材や加熱ローラを取り外す様子を示す図である。FIG. 4 is a diagram illustrating a state in which a power supply member and a heating roller are removed from a heating device included in the fixing device of FIG. 1;
【図５】図１の定着装置が有する加熱装置において、給
電部材や加熱ローラを取り外す様子を示す図である。FIG. 5 is a diagram illustrating a state in which a power supply member and a heating roller are removed in the heating device included in the fixing device of FIG. 1;
【図６】図１の定着装置が有する加熱装置において、加
熱ローラを取り外す様子を示す図である。FIG. 6 is a diagram illustrating a state in which a heating roller is removed in the heating device included in the fixing device of FIG. 1;
【図７】加熱ローラの一部を断面で示す概略斜視図であ
る。FIG. 7 is a schematic perspective view showing a part of a heating roller in a cross section.
【図８】本発明に係る加熱ローラの他の例を示す図であ
る。FIG. 8 is a view showing another example of the heating roller according to the present invention.
１、１′ 加熱ローラ（加熱回転体） １０ 芯ローラ（無端状回転体） １１ 絶縁層 １２ 抵抗発熱層 １３ 離型層 １４ ギア １５、１５′ 受電部材 １５２ 受電部材１５の平坦頂面 １６、１６′ 給電部材 １６１ バネ １６２ リード線 １６３ 給電部材１６の面 ２ 加圧ローラ ２１ 加圧ローラ２の軸 ３１ 加熱ローラ１の軸受け ３２ 加圧ローラ２の支持部材 ３２１ バネ ３３ 端子板 ３４ 電線 ３４１ 圧着端子 ４１、４２ ホルダー Ｈ 定着装置ハウジング ８ 電源 ＳＳＲ リレー Ｓ１、Ｓ２、Ｓ３ ネジ DESCRIPTION OF SYMBOLS 1, 1 'Heating roller (heating rotating body) 10 Core roller (endless rotating body) 11 Insulating layer 12 Resistance heating layer 13 Release layer 14 Gear 15, 15' Power receiving member 152 Flat top surface 16, 16 of power receiving member 15 ′ Power supply member 161 Spring 162 Lead wire 163 Surface of power supply member 16 2 Pressure roller 21 Shaft of pressure roller 2 31 Bearing of heating roller 1 32 Support member of pressure roller 2 321 Spring 33 Terminal plate 34 Electric wire 341 Crimping terminal 41 , 42 Holder H Fixing device housing 8 Power supply SSR Relay S1, S2, S3 Screw
Claims (14)
熱する抵抗発熱体と、 前記無端状回転体の中空内部に設けられ、前記抵抗発熱
体に電気的に接続された受電部材と、 前記受電部材に接触し、電源に電気的に接続される給電
部材とを備えていることを特徴とする加熱装置。1. An endless rotating body for rotating a peripheral surface, a resistance heating element provided on the peripheral surface of the endless rotating body, and generating heat when energized, and provided in a hollow interior of the endless rotating body. A heating device, comprising: a power receiving member electrically connected to the resistance heating element; and a power feeding member in contact with the power receiving member and electrically connected to a power supply.
造部材を兼ねている請求項１記載の加熱装置。2. The heating device according to claim 1, wherein the power receiving member also serves as an internal structural member of the endless rotating body.
切り壁状に設けられていて、該無端状回転体の回転軸線
方向の外側に向け露出しており、前記給電部材は該無端
状回転体の回転軸線方向の外側から該受電部材に接触す
る請求項１又は２記載の加熱装置。3. The endless rotator is provided in the shape of an inner partition wall of the endless rotator, and is exposed outward in the rotation axis direction of the endless rotator. The heating device according to claim 1, wherein the heating device comes into contact with the power receiving member from outside in a rotation axis direction of the rotating body.
周面にリング状に設けられており、前記給電部材は該受
電部材に該無端状回転体の中空内部において接触する請
求項１又は２記載の加熱装置。4. The power receiving member is provided in a ring shape on a hollow inner peripheral surface of the endless rotating body, and the power feeding member contacts the power receiving member in a hollow interior of the endless rotating body. Or the heating device according to 2.
線方向を横切る方向から前記受電部材に接触する請求項
４記載の加熱装置。5. The heating device according to claim 4, wherein the power supply member contacts the power receiving member from a direction transverse to a rotation axis direction of the endless rotating body.
あり、前記受電部材は該ローラと一体的に回転する請求
項１から５のいずれかに記載の加熱装置。6. The heating device according to claim 1, wherein the endless rotating body is a hollow cylindrical roller, and the power receiving member rotates integrally with the roller.
圧装置が設けられている請求項１から６のいずれかに記
載の加熱装置。7. The heating device according to claim 1, further comprising a pressing device for pressing the power supply member against the power receiving member.
材へ向けて押すコイルバネを含んでいる請求項７記載の
加熱装置。8. The heating device according to claim 7, wherein the pressing device includes a coil spring that presses the power supply member toward the power receiving member.
めの面を有し、該給電部材は該受電部材との接触のため
の面を有し、該受電部材の該給電部材との接触のための
面の面積は、該給電部材の該受電部材との接触のための
面の面積より大きい請求項１から８のいずれかに記載の
加熱装置。9. The power receiving member has a surface for contact with the power supply member, the power supply member has a surface for contact with the power reception member, and the power receiving member has a surface for contact with the power supply member. The heating device according to any one of claims 1 to 8, wherein an area of a surface for contact is larger than an area of a surface for contact of the power supply member with the power receiving member.
熱する抵抗発熱体と、 前記加熱装置に設けられる給電部材と接触させるために
前記無端状回転体の中空内部に設けられ、前記抵抗発熱
体に電気的に接続された受電部材とを備えていることを
特徴とする加熱回転体。10. A heating rotator used for a heating device, comprising: an endless rotator for rotating and moving a peripheral surface; a resistance heating element provided on a peripheral surface of the endless rotator, for generating heat when energized; A heating member provided in the hollow interior of the endless rotating member for contact with a power supply member provided in the heating device, and a power receiving member electrically connected to the resistance heating element. .
構造部材を兼ねている請求項１０記載の加熱回転体。11. The heating rotator according to claim 10, wherein said power receiving member also serves as an internal structural member of said endless rotator.
仕切り壁状に設けられていて、前記給電部材との接触の
ために該無端状回転体の回転軸線方向の外側に向け露出
している請求項１０又は１１記載の加熱回転体。12. The power receiving member is provided in the shape of an internal partition wall of the endless rotary body, and is exposed outward in the rotation axis direction of the endless rotary body for contact with the power supply member. The heating rotator according to claim 10.
内周面にリング状に設けられている請求項１０又は１１
記載の加熱回転体。13. The endless rotating body according to claim 10, wherein said power receiving member is provided in a ring shape on a hollow inner peripheral surface of said endless rotating body.
The heating rotator according to the description.
であり、前記受電部材は該ローラと一体的に回転する請
求項１０から１３のいずれかに記載の加熱回転体。14. The heating rotator according to claim 10, wherein said endless rotator is a hollow cylindrical roller, and said power receiving member rotates integrally with said roller.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26875597A JP3944965B2 (en) | 1996-12-28 | 1997-10-01 | Heating device and heating rotating body |
| US08/998,040 US6054677A (en) | 1996-12-24 | 1997-12-23 | Heating device and heating rotary member |
| CNB971263051A CN1148614C (en) | 1996-12-24 | 1997-12-24 | Heating device and heating rotary member |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8-358452 | 1996-12-28 | ||
| JP35845296 | 1996-12-28 | ||
| JP26875597A JP3944965B2 (en) | 1996-12-28 | 1997-10-01 | Heating device and heating rotating body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10241832A true JPH10241832A (en) | 1998-09-11 |
| JP3944965B2 JP3944965B2 (en) | 2007-07-18 |
Family
ID=26548463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26875597A Expired - Fee Related JP3944965B2 (en) | 1996-12-24 | 1997-10-01 | Heating device and heating rotating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3944965B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015500959A (en) * | 2011-11-30 | 2015-01-08 | オートマチック ラミネーション テクノロジーズ エス．アール．エル．Ａｕｔｏｍａｔｉｃ Ｌａｍｉｎａｔｉｏｎ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｓ．Ｒ．Ｌ． | Roll device |
| KR102431852B1 (en) * | 2021-03-02 | 2022-08-12 | 아이디피(주) | Direct heating device for retransfer printer |
-
1997
- 1997-10-01 JP JP26875597A patent/JP3944965B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015500959A (en) * | 2011-11-30 | 2015-01-08 | オートマチック ラミネーション テクノロジーズ エス．アール．エル．Ａｕｔｏｍａｔｉｃ Ｌａｍｉｎａｔｉｏｎ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｓ．Ｒ．Ｌ． | Roll device |
| US9321253B2 (en) | 2011-11-30 | 2016-04-26 | Automatic Lamination Technologies S.R.L. | Roll device |
| KR102431852B1 (en) * | 2021-03-02 | 2022-08-12 | 아이디피(주) | Direct heating device for retransfer printer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3944965B2 (en) | 2007-07-18 |
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