JPH08328414A - Heat roller and its production - Google Patents

Heat roller and its production

Info

Publication number
JPH08328414A
JPH08328414A JP7131895A JP13189595A JPH08328414A JP H08328414 A JPH08328414 A JP H08328414A JP 7131895 A JP7131895 A JP 7131895A JP 13189595 A JP13189595 A JP 13189595A JP H08328414 A JPH08328414 A JP H08328414A
Authority
JP
Japan
Prior art keywords
roller
heat
power feeding
electrodes
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7131895A
Other languages
Japanese (ja)
Inventor
Hiroshi Tomita
寛 冨田
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7131895A priority Critical patent/JPH08328414A/en
Publication of JPH08328414A publication Critical patent/JPH08328414A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To produce a heat roller constituted to prevent the occurrence of vibration occurring in power feeding without increasing its cost. CONSTITUTION: An insulating layer 3 is formed on a core material 2 of the roller and the surface of the insulating layer 3 is provided with plural resistors 4. Next, the entire part of the peripheral surface of the roller is coated with a heat resistant release material from above these resistors 4 and the prescribed width in the central part in the axial direction of the roller is cut and ground to form a fixing part release layer 5b. The heat resistant release material is cut off until the resistors 4 are exposed at both ends of the roller to form power feed parts in the cutting and grinding stage. As a result, power feed part release layers 5a are formed between the respective resistors 4 and the feed part surfaces are made into smooth cylindrical surfaces. The vibration at the time of vibrating with power feed brushes is thus prevented.

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、複写機、プリンタ等の
画像形成装置に装着される定着装置のヒートローラとそ
の製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat roller for a fixing device mounted on an image forming apparatus such as a copying machine or a printer, and a method for manufacturing the heat roller.

【0002】[0002]

【従来の技術】複写機、プリンタ、ファクシミリ等の画
像形成装置に装着され、転写紙等の記録媒体上に転写さ
れた未定着画像(加熱溶融性の樹脂等よりなるトナーに
より形成された画像)を加熱して記録媒体上に定着させ
る定着装置として、ヒートローラ(加熱ローラ)と加圧
ローラとを圧接させ、両ローラ間に記録媒体を通過させ
て熱と圧力とにより記録媒体上の未定着トナー像の定着
を行なう、ヒートローラ方式の定着装置が広く使用され
ている。
2. Description of the Related Art An unfixed image (an image formed by toner made of heat-meltable resin) mounted on an image forming apparatus such as a copying machine, a printer or a facsimile and transferred onto a recording medium such as transfer paper. As a fixing device that heats and fixes a recording medium on a recording medium, a heat roller (heating roller) and a pressure roller are brought into pressure contact with each other, the recording medium is passed between both rollers, and heat and pressure cause unfixed on the recording medium. A heat roller type fixing device for fixing a toner image is widely used.

【0003】この様な定着装置のヒートローラは、一般
に、中空のパイプ状ローラの内部にハロゲンランプを設
置し、そのハロゲンランプを発熱させてローラ全体を加
熱するようにしている。しかし中空ローラにハロゲンラ
ンプを組み合わせたヒートローラでは、ローラとランプ
の間に空気層が介在しているため加熱効率が悪く、立ち
上がりに時間がかかる。
In the heat roller of such a fixing device, generally, a halogen lamp is installed inside a hollow pipe-shaped roller, and the halogen lamp is heated to heat the entire roller. However, in a heat roller in which a hollow roller and a halogen lamp are combined, since an air layer is present between the roller and the lamp, the heating efficiency is poor and it takes time to start up.

【0004】そこで、ヒートローラの外表面に電気抵抗
体を被着し、これに通電して発熱させるようにしたヒー
トローラが提案されている。このようなヒートローラで
は、ローラ表面で熱が発生することになり、加熱効率が
高められる。さらに、電力消費の無駄を省くために、抵
抗体(発熱体)をヒートローラの周方向に複数に分割し
(複数の発熱体をローラの長手方向に配する)、それら
をヒートローラの回転に伴って選択的に発熱させるよう
にしたものが提案されている(特開平5−35137号
公報、特開昭56−120560号公報参照)。なお、
発熱体が完全に分割されていなくとも、少なくともロー
ラ一端側の給電部(電極部)が分割されていれば、ロー
ラの長手方向に配した複数の発熱体を選択的に発熱させ
ることができる。例えば、特開平6−75494号公報
に示されたヒートローラでは、1本の連続した発熱体を
ローラ両端の電極部が周方向に分割されるように配し
て、発熱体が選択的に発熱するようにしている。
Therefore, there has been proposed a heat roller in which an electric resistor is attached to the outer surface of the heat roller, and electricity is applied to the electric resistor to generate heat. In such a heat roller, heat is generated on the roller surface, and the heating efficiency is improved. Further, in order to save the waste of power consumption, the resistor (heating element) is divided into a plurality of pieces in the circumferential direction of the heat roller (the heating elements are arranged in the longitudinal direction of the roller), and these are used for rotation of the heat roller. Along with this, there has been proposed one in which heat is selectively generated (see JP-A-5-35137 and JP-A-56-120560). In addition,
Even if the heating element is not completely divided, if at least the feeding portion (electrode portion) on the one end side of the roller is divided, a plurality of heating elements arranged in the longitudinal direction of the roller can selectively generate heat. For example, in the heat roller disclosed in Japanese Unexamined Patent Publication No. 6-75494, one continuous heating element is arranged so that the electrode portions at both ends of the roller are divided in the circumferential direction, and the heating element selectively generates heat. I am trying to do it.

【0005】一般に、これら発熱体への電力供給は、定
着装置の給電部材とヒートローラ発熱体の電極(給電電
極)とを接触(摺動)させることにより行っている。し
かし、各発熱体の給電電極と給電部材とが接触する際
に、両者の接触部において、その接離に伴うスパークが
発生する場合がある。このスパークは一般的に、高電圧
又は高電流をかけたまま給電電極と給電部材が接離する
ときに発生するが、接離する部分の形状が尖っていた
り、給電電極または給電部材の部分的な凹凸に起因する
振動によって給電電極と給電部材の間に微小なギャップ
ができることで発生する場合が多い。なお、この振動
は、一般的に、給電部材がバネ等により給電電極に押し
当てられているために生ずる。このようにヒートローラ
給電部におけるスパークが発生した場合には、スパーク
による電磁ノイズが本体装置(定着装置が装着された画
像形成装置)を誤動作させたり、周辺装置を誤動作させ
たりする恐れがある。
In general, power is supplied to these heating elements by bringing the power supply member of the fixing device into contact (sliding) with the electrode (power supply electrode) of the heat roller heating element. However, when the power supply electrode of each heating element and the power supply member are in contact with each other, a spark may be generated at the contact portion between the two, due to the contact and separation thereof. This spark generally occurs when the power feeding electrode and the power feeding member come into contact with or separate from each other while a high voltage or a high current is applied. In many cases, a minute gap is formed between the power feeding electrode and the power feeding member due to vibration caused by such unevenness. Note that this vibration generally occurs because the power feeding member is pressed against the power feeding electrode by a spring or the like. When a spark is generated in the heat roller power supply unit as described above, electromagnetic noise due to the spark may cause a malfunction of the main body device (image forming apparatus equipped with a fixing device) or a malfunction of peripheral devices.

【0006】ところで、上記特開平5−35137号公
報および特開平6−75494号公報に示されたヒート
ローラでは、抵抗発熱層がローラ表面上に形成されてい
るので、給電部におけるローラ表面が平ら(滑らか)で
なく、給電電極と給電部材が摺動する際に振動が発生
し、スパークが発生する可能性がある。一方、特開昭5
6−120560号公報に示されたヒートローラでは、
各抵抗体(抵抗層)の間に絶縁層(絶縁体)が配されて
いるので、給電部表面が滑らかな円筒表面となり給電に
伴う振動が防止される。
By the way, in the heat roller disclosed in the above-mentioned JP-A-5-35137 and JP-A-6-75494, since the resistance heating layer is formed on the roller surface, the roller surface in the power feeding portion is flat. Not (smooth), vibration may occur when the power feeding electrode and the power feeding member slide, and spark may occur. On the other hand, JP-A-5
In the heat roller disclosed in Japanese Unexamined Patent Publication No. 6-120560,
Since the insulating layer (insulator) is arranged between each resistor (resistive layer), the surface of the power feeding portion becomes a smooth cylindrical surface, and vibration due to power feeding is prevented.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、ヒート
ローラ製造に際し、複数の抵抗体の間に絶縁層を配設す
るのに手間が掛かり、また、その給電部表面を滑らかに
構成するには、抵抗体と絶縁層を構成する部材の厚み等
の部品精度及びそれらを組み付ける際の精度が要求さ
れ、ヒートローラの製造コストを上昇させるという問題
があった。
However, in manufacturing a heat roller, it takes a lot of time to dispose an insulating layer between a plurality of resistors, and in order to form a smooth surface of the power feeding portion, the resistance is required. There has been a problem that the precision of parts such as the thickness of the member forming the body and the insulating layer and the precision in assembling them are required, which increases the manufacturing cost of the heat roller.

【0008】また、特開昭56−120560号公報に
示されたヒートローラでは、給電部材がヒートローラと
の摺動により摩耗し、その摩耗粉(給電部材の摩耗粉)
が給電部に固着するという問題があった。
Further, in the heat roller disclosed in Japanese Patent Application Laid-Open No. 56-120560, the power feeding member is abraded by sliding with the heat roller, resulting in wear powder (wear powder of the power feeding member).
Had a problem of being stuck to the power feeding part.

【0009】本発明は、従来のヒートローラ製造方法に
おける上述の問題を解決し、給電に伴う振動発生を防止
したヒートローラをコストを上昇させることなく製造す
る方法を提供することを課題とする。
An object of the present invention is to solve the above-mentioned problems in the conventional heat roller manufacturing method, and to provide a method for manufacturing a heat roller in which the occurrence of vibration due to power feeding is prevented without increasing the cost.

【0010】また、給電部材の摩耗粉のローラ給電部へ
の付着を防止したヒートローラを提供することも本発明
の課題である。
Another object of the present invention is to provide a heat roller in which abrasion powder of the power feeding member is prevented from adhering to the roller power feeding portion.

【0011】[0011]

【課題を解決するための手段】前記の課題は、本発明に
より、ローラ表層にローラ軸方向に延在する発熱体をロ
ーラ周方向に所定の間隔で複数配設し、各発熱体のロー
ラ軸方向両端部に設けられた電極をローラ表面に露出さ
せ、ローラ周方向に隣接する各電極間に絶縁材を配設
し、該絶縁材と各電極とにより構成される給電部表面を
滑らかな円筒表面に形成するヒートローラの製造方法に
おいて、ローラ芯材又はローラ芯材を覆う絶縁層上に複
数の発熱体を配設し、該発熱体上からローラ周面全体を
絶縁材により被覆し、ローラ軸方向中央部における所定
幅のローラ周面を切削研磨して定着部保護層を形成する
とともに、ローラ両端部の周面を前記電極が露出するま
で切削研磨して滑らかな円筒表面の給電部を形成するこ
とにより解決される。
According to the present invention, a plurality of heating elements extending in the roller axial direction are arranged on the surface layer of the roller at predetermined intervals in the circumferential direction of the roller. The electrodes provided at both ends in the direction of the roller are exposed on the roller surface, an insulating material is arranged between adjacent electrodes in the roller circumferential direction, and the surface of the power feeding portion formed by the insulating material and each electrode is a smooth cylinder. In a method of manufacturing a heat roller formed on a surface, a plurality of heating elements are provided on a roller core material or an insulating layer covering the roller core material, and the entire peripheral surface of the roller is covered with the insulating material from the heating element, A roller peripheral surface of a predetermined width in the axial center is cut and polished to form a fixing portion protective layer, and the peripheral surfaces of both ends of the roller are ground and polished until the electrodes are exposed to form a smooth cylindrical power feeding portion. Solved by forming

【0012】また、本発明は、前記の課題を解決するた
めに、ローラ軸方向に延設され通電により発熱する発熱
体をローラ表層に有するヒートローラであって、前記発
熱体がローラ周方向に所定の間隔で複数配置され、各発
熱体のローラ軸方向両端部に電極が設けられ、該両端部
の電極のうち少なくとも一端側の電極がローラ周方向に
隣接する電極とは分離して設けられ、前記複数の発熱体
が選択的に発熱可能なヒートローラにおいて、前記隣接
する電極とは分離して設けられた各電極間に耐熱性離型
材が配設され、該離型材と各電極とにより構成される給
電部表面を滑らかな円筒表面に形成することを提案す
る。
Further, in order to solve the above-mentioned problems, the present invention is a heat roller having a heating element extending in the axial direction of the roller and generating heat when energized in the roller surface layer, wherein the heating element is arranged in the circumferential direction of the roller. A plurality of electrodes are provided at predetermined intervals, and electrodes are provided at both ends in the roller axial direction of each heating element, and at least one of the electrodes at both ends is provided separately from the electrode adjacent in the roller circumferential direction. In the heat roller capable of selectively generating heat from the plurality of heating elements, a heat-resistant release material is disposed between the electrodes that are provided separately from the adjacent electrodes, and the release material and the electrodes are used. It is proposed to form the surface of the feeding part to be constructed into a smooth cylindrical surface.

【0013】[0013]

【作用】ヒートローラの芯材又はローラ芯材を覆って形
成された絶縁層の上に複数の発熱体を配設する。次に、
その発熱体の上から、ローラの周面全体を絶縁材により
被覆する。そして、ローラの軸方向の中央部における所
定幅のローラ周面の絶縁材を切削研磨して定着部保護層
を形成する。それと同時に、ローラ両端部では、発熱体
端部に設けられた電極が露出するまでローラ周面の絶縁
材を切削研磨する。すると各電極間には絶縁材が充填さ
れた状態となり、給電部が滑らかな円筒表面として形成
される。
A plurality of heating elements are arranged on the core material of the heat roller or the insulating layer formed so as to cover the roller core material. next,
The entire peripheral surface of the roller is covered with an insulating material from above the heating element. Then, the insulating material on the peripheral surface of the roller having a predetermined width in the central portion in the axial direction of the roller is cut and polished to form the fixing portion protective layer. At the same time, at both ends of the roller, the insulating material on the peripheral surface of the roller is cut and ground until the electrodes provided at the ends of the heating element are exposed. Then, the insulating material is filled between the electrodes, and the power feeding portion is formed as a smooth cylindrical surface.

【0014】その他の作用については、以下の実施例の
説明で明らかとなるであろう。
Other functions will be apparent from the description of the embodiments below.

【0015】[0015]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。図1は、本発明の一実施例のヒートローラを示す
部分斜視図であり、図2は、その製造方法を説明するた
めの製造過程のローラ断面を順次示すものである。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial perspective view showing a heat roller according to an embodiment of the present invention, and FIG. 2 is a sectional view sequentially showing a roller in a manufacturing process for explaining a manufacturing method thereof.

【0016】これらの図に示すように、ヒートローラ1
は、金属製パイプである芯材2,芯材2の表面上に形成
された絶縁層3,絶縁層3の上に被着された抵抗体(発
熱層)4,発熱層4の上にある絶縁性離型層(耐熱性離
型層)5により構成される。なお、ローラ両端部では抵
抗体4が露出するまで離型層5が削られ、離型層は各抵
抗体4の間の給電部離型層5aのみとなっている。すな
わち、図1では、絶縁性離型層5を、各抵抗体4の間の
部分の給電部離型層5aと記録用紙と接する部分の定着
部離型層5bとして示している。
As shown in these figures, the heat roller 1
Is on a core material 2, which is a metal pipe, an insulating layer 3 formed on the surface of the core material 2, a resistor (heating layer) 4 deposited on the insulating layer 3, and a heating layer 4. It is composed of an insulating release layer (heat resistant release layer) 5. The release layer 5 is scraped off at both ends of the roller until the resistor 4 is exposed, and the release layer is only the power supply part release layer 5a between the resistors 4. That is, in FIG. 1, the insulating release layer 5 is shown as the power supply part release layer 5a in the part between the resistors 4 and the fixing part release layer 5b in the part in contact with the recording paper.

【0017】芯材2は、本実施例ではアルミニウム(A
l)製パイプを使用しているが、ガラスパイプ等絶縁性
のものを使用することもできる。絶縁層3には、アルミ
ナ等のセラミック又は同等の材料を用いることができ
る。抵抗体4は金属類のものを用い、ローラの周方向に
複数配置している。各抵抗体はローラの円周方向に所定
の間隔をあけて配置される。絶縁性離型層5a及び5b
には、PFAやPTFE等のテフロンを使用する。
The core material 2 is made of aluminum (A
Although the pipe made of l) is used, an insulating material such as a glass pipe may be used. For the insulating layer 3, a ceramic such as alumina or an equivalent material can be used. The resistors 4 are made of metal and are arranged in the circumferential direction of the roller. The resistors are arranged at predetermined intervals in the circumferential direction of the roller. Insulating release layers 5a and 5b
For this, Teflon such as PFA or PTFE is used.

【0018】ヒートローラ1の両端部では、抵抗体(発
熱体)4は離型層5bに覆われておらず、抵抗体4がロ
ーラ表面に露出して給電部を形成している。この給電部
の抵抗体4に定着装置の給電ブラシ(図示せず)が接触
して給電され、給電ブラシと接触した抵抗体4のみが発
熱することにより複数の抵抗体が選択的に発熱する。ヒ
ートローラ1の離型層5aに覆われた中央部が定着部で
あり、この部分が加圧ロ−ラと圧接されて転写紙を挟持
搬送する部分となる。
At both ends of the heat roller 1, the resistor (heating element) 4 is not covered with the release layer 5b, and the resistor 4 is exposed on the roller surface to form a power feeding portion. A power feeding brush (not shown) of the fixing device is brought into contact with the resistor 4 of the power feeding unit to feed power, and only the resistor 4 in contact with the power feeding brush generates heat, whereby the plurality of resistors selectively generate heat. The central portion of the heat roller 1 covered with the release layer 5a is a fixing portion, and this portion is a portion which is brought into pressure contact with the pressure roller to nip and convey the transfer paper.

【0019】次に、上記ヒートローラ1の製造方法につ
いて図2を参照して説明する。まず、芯材2を用意し
(a)、その芯材2の表面に絶縁層3を形成する
(b)。なお、芯材2が絶縁性材料の場合には絶縁層3
を形成する必要がなく、その行程を省略することができ
る。次に、絶縁層3の上に複数の抵抗体4を生成する
(c)。抵抗体4の生成は、抵抗体材料を印刷により所
定の形状に被着させたり、全面に塗布したあとエッチン
グにより所定のパターンを形成したりして行う。抵抗体
4を形成した後、ローラ周面全体に絶縁性の耐熱離型層
5を形成する(d)。離型層の形成は、テフロン等の材
料を塗布,焼生等により行う。抵抗体4を覆って形成さ
れた耐熱離型層5は、各抵抗体4の間にも充填されるこ
とになる。(d)の状態では、間隔をおいて配置された
抵抗体(分割された電極層)4の影響でローラ表面に凸
凹が生じている。このままでは定着ムラを生じるため、
ローラ外表面が均一に(平らに)なるよう切削研磨を行
う(e)。このとき、定着部(図2参照)の切削研磨と
同時に、ローラ軸方向端部の給電部(図2参照)も、電
極層4が露出するまで切削研磨を行う。定着部の切削研
磨と給電部の切削研磨とは、段差のある研磨部材(カッ
タ)で両部を同時に削りだしても、段差のない研磨部材
で切削量を調節して順次削りだしても良い。いずれの方
法でも、同じ切削研磨行程で定着部と給電部とを形成す
ることができる。
Next, a method of manufacturing the heat roller 1 will be described with reference to FIG. First, the core material 2 is prepared (a), and the insulating layer 3 is formed on the surface of the core material 2 (b). When the core material 2 is an insulating material, the insulating layer 3
Need not be formed and the process can be omitted. Next, a plurality of resistors 4 are formed on the insulating layer 3 (c). The resistor 4 is produced by applying a resistor material to a predetermined shape by printing or by applying it on the entire surface and then forming a predetermined pattern by etching. After forming the resistor 4, an insulating heat-resistant release layer 5 is formed on the entire surface of the roller (d). The release layer is formed by applying a material such as Teflon and baking. The heat-resistant release layer 5 formed so as to cover the resistors 4 is also filled between the resistors 4. In the state of (d), the roller surface is uneven due to the effect of the resistors (divided electrode layers) 4 arranged at intervals. As it is, uneven fixing occurs,
Cutting and polishing are performed so that the outer surface of the roller becomes uniform (flat) (e). At this time, simultaneously with the cutting and polishing of the fixing portion (see FIG. 2), the power feeding portion (see FIG. 2) at the end portion in the roller axial direction is also subjected to cutting and polishing until the electrode layer 4 is exposed. The cutting and polishing of the fixing portion and the cutting and feeding of the power feeding portion may be performed by cutting both parts at the same time with a stepped polishing member (cutter) or sequentially cutting by adjusting the cutting amount with a stepless polishing member. . By either method, the fixing portion and the power feeding portion can be formed in the same cutting and polishing process.

【0020】上記製造方法により完成されたヒートロー
ラ1の構造を、図3に拡大して示した。上述したよう
に、電極層4を覆う耐熱離型層は、分割された各電極層
4の間にも充填されている。そして、上述した切削研磨
行程にて、給電部の耐熱離型層を抵抗体4が露出するま
で切削研磨を行うことにより、給電部の外周面は凹凸の
無い滑らかな円筒状となる。つまり、給電部において
は、各抵抗体4の外表面と各抵抗体間の離型層5aの外
表面とが連続して一つの円筒表面を形成し、凸凹のない
滑らかな給電部を形成する。そのため、この給電部に給
電ブラシ(図示せず)が押し当てられ、給電ブラシとロ
ーラ1の給電部とが接触摺動する際に振動が発生せず、
給電時のスパーク発生が防止される。よって、スパーク
によりノイズが生ずることがなく、ヒートローラ1を備
えた定着装置が装着された画像形成装置本体、及び周辺
機器を誤動作させることがない。
The structure of the heat roller 1 completed by the above manufacturing method is shown enlarged in FIG. As described above, the heat-resistant release layer that covers the electrode layers 4 is also filled between the divided electrode layers 4. Then, in the cutting and polishing process described above, the heat-resistant release layer of the power feeding portion is ground and polished until the resistor 4 is exposed, so that the outer peripheral surface of the power feeding portion becomes a smooth cylindrical shape without irregularities. In other words, in the power feeding portion, the outer surface of each resistor 4 and the outer surface of the release layer 5a between the resistors continuously form one cylindrical surface, forming a smooth power feeding portion without unevenness. . Therefore, when a power feeding brush (not shown) is pressed against the power feeding portion and the power feeding brush and the power feeding portion of the roller 1 are in sliding contact with each other, vibration does not occur,
The occurrence of sparks during power supply is prevented. Therefore, noise is not generated by the sparks, and the image forming apparatus main body in which the fixing device including the heat roller 1 is mounted and the peripheral devices do not malfunction.

【0021】また、このヒートローラ1においては、給
電部の各抵抗体4の間に耐熱離型性材料が充填されて給
電部離型層5aが形成されているので、その部分の離型
性が優れている。従って、給電部に押し当てられる給電
ブラシ(カーボンブラシが広く利用される)の摩耗によ
り発生する摩耗粉の固着が抑制され、経時による振動発
生を防ぐことができる。
Further, in this heat roller 1, since the heat-resistant releasing material is filled between the resistors 4 of the power feeding portion to form the power feeding portion releasing layer 5a, the releasability of the portion is improved. Is excellent. Therefore, it is possible to suppress the adhesion of the abrasion powder generated by the abrasion of the power feeding brush (a carbon brush is widely used) pressed against the power feeding portion, and to prevent the occurrence of vibration over time.

【0022】さらに、本実施例におけるヒートローラ製
造方法によれば、給電部表面を滑らかな円筒形表面に形
成することができる。それに加えて、同じ切削研磨行程
でヒートローラ1の定着部と給電部とを形成することが
できるので、製造時の工程数を増加させることがなく、
コストの上昇を防止することができる。
Further, according to the heat roller manufacturing method of this embodiment, the power feeding portion surface can be formed into a smooth cylindrical surface. In addition, since the fixing portion and the power feeding portion of the heat roller 1 can be formed in the same cutting / polishing process, the number of manufacturing steps is not increased,
It is possible to prevent an increase in cost.

【0023】なお、本発明のヒートローラ製造方法は、
給電部表面を滑らかな円筒表面にするために各抵抗体4
の間に配設(充填)した部材が耐熱離型性材料でないヒ
ートローラの製造にも適用することが可能である。以下
に、その様なヒートローラの製造方法について図4を参
照して説明する。
The heat roller manufacturing method of the present invention is
Each resistor 4 in order to make the surface of the power feeding part a smooth cylindrical surface
It is also possible to apply to the manufacture of a heat roller in which the member disposed (filled) between is not a heat-resistant release material. Hereinafter, a method of manufacturing such a heat roller will be described with reference to FIG.

【0024】図4に示すヒートローラ11は、定着部の
ローラ表面層が、耐熱離型層5bとそれより離型性の乏
しい絶縁層6bの2層構造として構成されたものであ
る。このヒートローラ11の製造過程は、まず芯材2を
用意し、その芯材2の表面に絶縁層3を形成する。そし
て、絶縁層3の上に複数の抵抗体4を生成する。ここま
での工程は図2の(a)〜(c)の工程と同様であるの
で図示を省略する。なお、芯材2が絶縁性材料の場合に
は絶縁層3を形成する必要がなく、その行程を省略する
ことができるのは前記したヒートローラ1の場合と同様
である。次に、抵抗体(発熱層)4の上を絶縁層6によ
りローラ全体を被覆する(d1)。この絶縁層6の材料
としては、絶縁層3と同等のものを使用することができ
る。この状態では、各抵抗体4間のすき間によりローラ
表面に凸凹があるので、ローラ表面を切削研磨して滑ら
かにする(e1)。このとき、ローラ両端を各抵抗体4
が露出するまで切削研磨して給電部を形成する。本実施
例においては、給電部の各抵抗体4間には絶縁材料6が
充填されて給電部絶縁層6aが形成されることになる。
そして、ローラの定着部のみを耐熱離型層(絶縁性離型
層)5でさらに被覆する(f)。次いで、ローラ表面を
切削研磨し定着部離型層5bを形成して(g)、ヒート
ローラ11が完成する。
In the heat roller 11 shown in FIG. 4, the roller surface layer of the fixing portion has a two-layer structure of a heat-resistant release layer 5b and an insulating layer 6b having a poor releasability. In the manufacturing process of the heat roller 11, first, the core material 2 is prepared, and the insulating layer 3 is formed on the surface of the core material 2. Then, a plurality of resistors 4 are formed on the insulating layer 3. Since the steps up to this point are the same as the steps of FIGS. 2A to 2C, the illustration thereof is omitted. When the core material 2 is an insulating material, it is not necessary to form the insulating layer 3, and the process can be omitted as in the case of the heat roller 1 described above. Next, the entire roller is covered with the insulating layer 6 on the resistor (heating layer) 4 (d 1 ). As the material of the insulating layer 6, the same material as the insulating layer 3 can be used. In this state, since the roller surface has irregularities due to the gap between the resistors 4, the roller surface is cut and polished to be smooth (e 1 ). At this time, connect both ends of the roller to each resistor 4
Then, cutting and polishing are performed until the exposed portion is exposed to form a power feeding portion. In the present embodiment, the insulating material 6 is filled between the resistors 4 of the power feeding section to form the power feeding section insulating layer 6a.
Then, only the fixing portion of the roller is further covered with the heat-resistant release layer (insulating release layer) 5 (f). Next, the roller surface is cut and polished to form the fixing portion release layer 5b (g), and the heat roller 11 is completed.

【0025】このヒートローラ11においては、定着部
のローラ表層が絶縁層6bと耐熱離型層5bとの2層構
造となっている。耐熱離型層は絶縁層よりもコストが高
くつく。しかし、このヒートローラ11では、定着部の
ローラ表層を2層構造とすることにより、比較的高価な
耐熱離型層5を薄くしてコストの上昇を抑えることがで
きる。また、ヒートローラ11の給電部は各抵抗体4間
に給電部絶縁層6aが充填され、その表面が滑らかな円
筒表面にされている。従って、前記したヒートローラ1
と同様、給電ブラシとローラ11の給電部とが接触摺動
する際に振動が発生せず、給電時のスパーク発生が防止
される。なお、このヒートローラ11の製造にあたって
は、その工程数が前記したヒートローラ1よりも多くな
っているが、その分材料コストが低いものを用いること
ができるので、求められる性能要求や使用材料に応じ
て、有利なヒートローラを選択することができる。
In this heat roller 11, the roller surface layer of the fixing portion has a two-layer structure of an insulating layer 6b and a heat-resistant release layer 5b. The heat resistant release layer is more costly than the insulating layer. However, in the heat roller 11, the heat-resistant release layer 5 which is relatively expensive can be thinned and the cost increase can be suppressed by making the roller surface layer of the fixing portion have a two-layer structure. In addition, the power feeding portion of the heat roller 11 is filled with the power feeding portion insulating layer 6a between the resistors 4 and has a smooth cylindrical surface. Therefore, the heat roller 1 described above
Similarly to the above, vibration does not occur when the power feeding brush and the power feeding portion of the roller 11 slide in contact with each other, and thus spark generation during power feeding is prevented. Although the number of steps in manufacturing the heat roller 11 is larger than that of the heat roller 1 described above, a material having a lower material cost can be used, and therefore, required performance requirements and materials to be used can be obtained. Accordingly, an advantageous heat roller can be selected.

【0026】[0026]

【発明の効果】以上説明したように、本発明のヒートロ
ーラ製造方法によれば、給電部表面を滑らかな円筒形表
面に形成することができる。また、同じ切削研磨行程で
ヒートローラの定着部と給電部とを形成することができ
るので、製造時の工程数を増加させることがなく、コス
トの上昇を防止することができる。
As described above, according to the heat roller manufacturing method of the present invention, the surface of the power feeding portion can be formed into a smooth cylindrical surface. Further, since the fixing portion and the power feeding portion of the heat roller can be formed in the same cutting and polishing process, it is possible to prevent an increase in cost without increasing the number of manufacturing steps.

【0027】請求項2のヒートローラによれば、給電部
の各電極間に耐熱離型性材料が充填されているので、そ
の部分の離型性が優れている。従って、給電ブラシの摩
耗により発生する摩耗粉の固着が抑制され、経時による
振動発生を防ぐことができる。
According to the heat roller of the second aspect, since the heat-resistant mold-releasing material is filled between the electrodes of the power feeding part, the mold-releasing property of the part is excellent. Therefore, it is possible to prevent the abrasion powder from being fixed due to the abrasion of the power feeding brush, and to prevent the occurrence of vibration over time.

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

【図1】請求項2の発明に係るヒートローラの一実施例
を示す部分斜視図である。
FIG. 1 is a partial perspective view showing an embodiment of a heat roller according to the invention of claim 2. FIG.

【図2】そのヒートローラの製造方法を説明するため
の、製造過程におけるローラを順次示す図である。
FIG. 2 is a diagram sequentially showing rollers in a manufacturing process for explaining the manufacturing method of the heat roller.

【図3】図1に示したローラの構成を拡大して示す部分
側面図である。
FIG. 3 is a partial side view showing the configuration of the roller shown in FIG. 1 in an enlarged manner.

【図4】本発明のヒートローラ製造方法により製造され
たヒートローラの別例を説明するための、製造過程にお
けるローラを順次示す図である。
FIG. 4 is a diagram sequentially showing rollers in a manufacturing process for explaining another example of the heat roller manufactured by the heat roller manufacturing method of the present invention.

【符号の説明】[Explanation of symbols]

1,11 ヒートローラ 2 芯材(金属製パイプ) 3,6 絶縁層 4 抵抗体(電極層) 5 絶縁性離型層(耐熱離型層) 5a 給電部離型層 5b 定着部離型層 6a 給電部絶縁層 6b 定着部絶縁層 1,11 Heat roller 2 Core material (metal pipe) 3,6 Insulating layer 4 Resistor (electrode layer) 5 Insulating release layer (heat resistant release layer) 5a Power feeding part release layer 5b Fixing part release layer 6a Power supply insulation layer 6b Fixing insulation layer

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ローラ表層にローラ軸方向に延在する発
熱体をローラ周方向に所定の間隔で複数配設し、各発熱
体のローラ軸方向両端部に設けられた電極をローラ表面
に露出させ、ローラ周方向に隣接する各電極間に絶縁材
を配設し、該絶縁材と各電極とにより構成される給電部
表面を滑らかな円筒表面に形成するヒートローラの製造
方法において、 ローラ芯材又はローラ芯材を覆う絶縁層上に複数の発熱
体を配設し、該発熱体上からローラ周面全体を絶縁材に
より被覆し、ローラ軸方向中央部における所定幅のロー
ラ周面を切削研磨して定着部保護層を形成するととも
に、ローラ両端部の周面を前記電極が露出するまで切削
研磨して滑らかな円筒表面の給電部を形成することを特
徴とするヒートローラの製造方法。
1. A plurality of heating elements extending in the roller axial direction are provided on the surface layer of the roller at predetermined intervals in the roller circumferential direction, and electrodes provided at both ends of each heating element in the roller axial direction are exposed on the roller surface. In the method for manufacturing a heat roller, an insulating material is arranged between the electrodes adjacent to each other in the roller circumferential direction, and the surface of the power feeding portion formed by the insulating material and the electrodes is formed into a smooth cylindrical surface. A plurality of heating elements are arranged on an insulating layer that covers the material or the core material of the roller, the entire roller peripheral surface is covered with the insulating material from above the heating element, and the roller peripheral surface of a predetermined width in the central portion in the roller axial direction is cut. A method for manufacturing a heat roller, which comprises polishing to form a fixing portion protective layer, and cutting and polishing the peripheral surfaces of both end portions of the roller until the electrodes are exposed to form a smooth power feeding portion having a cylindrical surface.
【請求項2】 ローラ軸方向に延設され通電により発熱
する発熱体をローラ表層に有するヒートローラであっ
て、前記発熱体がローラ周方向に所定の間隔で複数配置
され、各発熱体のローラ軸方向両端部に電極が設けら
れ、該両端部の電極のうち少なくとも一端側の電極がロ
ーラ周方向に隣接する電極とは分離して設けられ、前記
複数の発熱体が選択的に発熱可能なヒートローラにおい
て、 前記隣接する電極とは分離して設けられた各電極間に耐
熱性離型材が配設され、該離型材と各電極とにより構成
される給電部表面を滑らかな円筒表面に形成したことを
特徴とするヒートローラ。
2. A heat roller having a heating element extending in the roller axial direction and generating heat when energized on a roller surface layer, wherein a plurality of said heating elements are arranged at predetermined intervals in the roller circumferential direction, and each heating element's roller is provided. Electrodes are provided at both ends in the axial direction, and at least one of the electrodes at both ends is provided separately from an electrode adjacent in the roller circumferential direction, and the plurality of heating elements can selectively generate heat. In the heat roller, a heat-resistant mold-releasing material is arranged between the electrodes that are provided separately from the adjacent electrodes, and the surface of the power feeding portion formed by the mold-releasing material and each electrode is formed into a smooth cylindrical surface. A heat roller characterized by the above.
JP7131895A 1995-05-30 1995-05-30 Heat roller and its production Pending JPH08328414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7131895A JPH08328414A (en) 1995-05-30 1995-05-30 Heat roller and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7131895A JPH08328414A (en) 1995-05-30 1995-05-30 Heat roller and its production

Publications (1)

Publication Number Publication Date
JPH08328414A true JPH08328414A (en) 1996-12-13

Family

ID=15068671

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7131895A Pending JPH08328414A (en) 1995-05-30 1995-05-30 Heat roller and its production

Country Status (1)

Country Link
JP (1) JPH08328414A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010137797A1 (en) * 2009-05-27 2010-12-02 Ls Cable Ltd. Heating pipe
JP2017211574A (en) * 2016-05-27 2017-11-30 キヤノン株式会社 Heating rotary body and image heating device including the heating rotary body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010137797A1 (en) * 2009-05-27 2010-12-02 Ls Cable Ltd. Heating pipe
JP2017211574A (en) * 2016-05-27 2017-11-30 キヤノン株式会社 Heating rotary body and image heating device including the heating rotary body

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