JPH08248798A - Fixing roller and its production - Google Patents
Fixing roller and its productionInfo
- Publication number
- JPH08248798A JPH08248798A JP7198106A JP19810695A JPH08248798A JP H08248798 A JPH08248798 A JP H08248798A JP 7198106 A JP7198106 A JP 7198106A JP 19810695 A JP19810695 A JP 19810695A JP H08248798 A JPH08248798 A JP H08248798A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- fixing roller
- hole
- reinforcing
- core metal
- 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)
- Electrophotography Configuration And Component (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子写真複写機、
レーザービームプリンター、ファクシミリ等の電子写真
装置における定着部（定着装置）に用いられる定着ロー
ラに関し、さらに詳しくは、ヒートアップタイムが短縮
され、かつ、駆動力を伝達するギア部材との嵌合部が補
強された定着ローラに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic copying machine,
Regarding a fixing roller used for a fixing unit (fixing device) in an electrophotographic apparatus such as a laser beam printer and a facsimile, more specifically, a heat roller has a shortened heat-up time and a fitting portion with a gear member for transmitting a driving force. It relates to a reinforced fuser roller.
【０００２】[0002]
【従来の技術】静電複写方式を利用した電子写真複写機
やレーザープリンタ、ファクシミリ等の定着には、熱ロ
ーラ定着方式が汎用されている。即ち、定着部における
定着部材として、内部に電熱ヒータ等の加熱源を配置
し、外表面上を離型性の良いフッ素樹脂等で被覆した定
着ローラ（熱ローラ）と、該定着ローラに対向して密着
させた加圧ローラ（通常、ゴムローラ）とを用い、これ
らのローラ間にトナー像を形成した転写紙を通過させ
て、該トナー像を転写紙上に熱融着させて定着させる方
式である。2. Description of the Related Art A heat roller fixing method is generally used for fixing an electrophotographic copying machine, a laser printer, a facsimile or the like using an electrostatic copying method. That is, as a fixing member in the fixing unit, a heat source such as an electric heater is arranged inside, and a fixing roller (heat roller) whose outer surface is covered with a fluororesin or the like having good releasability, and a fixing roller facing the fixing roller. It is a method of using a pressure roller (usually a rubber roller) closely contacted with each other, and passing a transfer paper on which a toner image is formed between these rollers, and thermally fixing the toner image on the transfer paper. .
【０００３】熱ローラ定着方式は、他の定着方式と比較
して、熱効率が高く、高速化に適しているが、定着ロー
ラの寿命が短いという欠点を有している。その原因とし
て、例えば、長期間の使用によるフッ素樹脂層の界面剥
離の問題等があり、必要な対策がとられている。ところ
が、最近では、定着ローラの薄肉化に伴う新たな問題点
が生じている。The heat roller fixing method has high thermal efficiency and is suitable for speeding up as compared with other fixing methods, but has a drawback that the life of the fixing roller is short. The cause thereof is, for example, a problem of interfacial peeling of the fluororesin layer due to long-term use, and necessary measures are taken. However, recently, new problems have arisen as the fixing roller becomes thinner.
【０００４】最近の電子写真複写機等におけるニーズと
して、スイッチを入れた（ＯＮ）後の待ち時間の短縮が
ある。複写機等を作動させるためにスイッチを入れる
と、ヒータが加熱されるが、定着ローラが所定の温度に
到達するのに数十秒から数分間の待ち時間が必要とな
る。事務処理の迅速化のために、この待ち時間（ヒート
アップタイム）の短縮が望まれている。また、複写機等
をいつでも使用できるようにするために、不使用時でも
通電しているが、エネルギーの無駄であり、電気代もか
さむことになる。所定時間不使用状態が続くと、ヒータ
のスイッチが切れる（ＯＦＦになる）か、あるいは保持
温度を自動的に低く設定し、入力があると再びヒートア
ップを行う節電機能の付いた機種もあるが、これらの場
合でも、所定の温度にまでヒートアップするのに、再び
数十秒から数分間の待ち時間が必要となる。A recent need for electrophotographic copying machines and the like is to shorten the waiting time after the switch is turned on (ON). When the switch is turned on to operate the copying machine or the like, the heater is heated, but a waiting time of several tens of seconds to several minutes is required for the fixing roller to reach a predetermined temperature. It is desired to reduce the waiting time (heat-up time) in order to speed up office work. Further, in order to be able to use the copying machine or the like at any time, electricity is supplied even when the copying machine is not in use, but this is a waste of energy and increases the electricity bill. If the heater is switched off (turns off) after a period of non-use for a certain period of time, or the holding temperature is automatically set low, some models have a power saving function that heats up again when there is an input. Even in these cases, waiting time of several tens of seconds to several minutes is required again to heat up to the predetermined temperature.
【０００５】このような待ち時間の短縮化方策のひとつ
として、定着ローラ（熱ローラ）の薄肉化により熱容量
を減らす方法が検討されている。ところが、定着ローラ
を薄肉化すると、機械的強度の低下が避けられず、特
に、端部におけるギア部材との嵌合部から破損しやすい
という問題が生じる。この問題点について、定着ローラ
や定着装置（複写機等の定着部）の構造等を参照しなが
ら、より具体的に説明する。As one of the measures for reducing the waiting time, a method of reducing the heat capacity by thinning the fixing roller (heat roller) is being studied. However, if the fixing roller is made thin, a decrease in mechanical strength is unavoidable, and in particular, there is a problem that the fitting portion of the end portion with the gear member is easily damaged. This problem will be described more specifically with reference to the structure of a fixing roller and a fixing device (fixing unit of a copying machine).
【０００６】定着ローラは、一般に、アルミニウムやス
テンレス等の金属で形成された円筒状の基材（芯金）の
外表面に、オフセット防止のために、フッ素樹脂などの
被覆層を設けた構造を有している。図１に示すように、
定着ローラ１は、薄肉円筒状の金属製基材（薄肉円筒状
芯金）の外表面に、フッ素樹脂のコーティング層２が形
成されている。定着ローラ１の両端部は、軸受３と４に
より定着装置に取り付けられ、その一方の端部には、ギ
ア７が取り付けられる。駆動手段に連結されたギア８か
ら、ギア７を通じて、モータの駆動力が定着ローラ１に
伝えられ、定着ローラ１が回転するようになっている。
定着ローラ１の内側には、ヒータ５が配置され、このヒ
ータ５によって定着ローラ１が加熱される。定着ローラ
に対向して加圧ローラ（通常、ゴムローラ）が配置さ
れ、これら両ローラ間を転写紙が通過し、その間に加熱
されてトナー像が転写紙に熱融着する。The fixing roller generally has a structure in which a coating layer of fluororesin or the like is provided on the outer surface of a cylindrical base material (core metal) formed of metal such as aluminum or stainless steel to prevent offset. Have As shown in Figure 1,
The fixing roller 1 has a coating layer 2 of fluororesin formed on the outer surface of a thin-walled cylindrical metal base material (thin-walled cylindrical core metal). Both ends of the fixing roller 1 are attached to the fixing device by bearings 3 and 4, and a gear 7 is attached to one end thereof. The driving force of the motor is transmitted from the gear 8 connected to the driving means to the fixing roller 1 through the gear 7, and the fixing roller 1 is rotated.
A heater 5 is arranged inside the fixing roller 1, and the fixing roller 1 is heated by the heater 5. A pressure roller (usually a rubber roller) is arranged opposite to the fixing roller, and the transfer paper passes between these rollers and is heated during that time so that the toner image is thermally fused to the transfer paper.
【０００７】図２に示すように、定着ローラのギア７が
取り付けられる側の端部には、Ｕ字形のキー溝９が形成
されており、このキー溝９にギアまたはギアのシャフト
に形成された突起が嵌合して、ギア７に与えられた駆動
力を、空回りすることなく定着ローラ１に伝えるように
なっている。ギア部材との嵌合部の形状は、Ｕ字溝など
の溝だけではなく、穴（孔、開口）であってもよく、そ
の場合には、ギアと定着ローラは、ギアまたはギアのシ
ャフトに形成された突起を該穴に嵌合するか、あるいは
ピンを嵌めて係合する。図３に、キーみぞを形成した定
着ローラの外観図を示す。As shown in FIG. 2, a U-shaped key groove 9 is formed at the end of the fixing roller on the side where the gear 7 is mounted, and this key groove 9 is formed on the gear or the shaft of the gear. The protrusions are fitted to transmit the driving force applied to the gear 7 to the fixing roller 1 without idling. The shape of the fitting portion with the gear member may be not only a groove such as a U-shaped groove but also a hole (hole, opening). In that case, the gear and the fixing roller may be attached to the gear or the shaft of the gear. The formed protrusion is fitted into the hole, or a pin is fitted and engaged. FIG. 3 shows an external view of a fixing roller having a key groove.
【０００８】このような定着ローラは、使用中に、図４
に示すように、Ｕ字溝などの嵌合部からひび割れ１０を
生じて破損するという問題があった。ヒートアップタイ
ムを短縮するために、定着ローラの薄肉化を図ると、こ
れまで以上に嵌合部から破損しやすくなり、定着ローラ
の耐久性がさらに低下する。しかしながら、この問題に
対する有効な対処手段は見いだされていなかったのが現
状である。[0008] Such a fixing roller is not used in FIG.
As shown in FIG. 3, there is a problem that the fitting portion such as the U-shaped groove causes a crack 10 to be damaged. If the thickness of the fixing roller is reduced in order to shorten the heat-up time, the fitting portion is more likely to be damaged and the durability of the fixing roller is further reduced. However, the present situation is that no effective countermeasure for this problem has been found.
【０００９】[0009]
【発明が解決しようとする課題】本発明の目的は、ヒー
トアップタイムが短縮され、しかもギア部材との嵌合部
からの破損が防止され、耐久性に優れた定着ローラを提
供することにある。本発明者らは、前記従来技術の問題
点を克服するために鋭意研究した結果、定着ローラの嵌
合部に補強部を設けることにより、前記目的を達成でき
ることを見いだした。補強部の具体例としては、溝や穴
などの形状の嵌合部の周りに凸部を設ける方法が挙げら
れる。凸部を設ける方法としては、肉厚部、折り曲げ部
（張り出し部分）、補強部材の貼り付け部などを設ける
方法がある。例えば、ギア部材との嵌合物の形状を溝ま
たは穴とし、かつ、溝または穴の周縁部の少なくとも一
部に、曲げ加工による張り出し部分を所定の長さ設ける
ことにより、薄肉化した定着ローラの補強を効果的に行
うことができる。SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing roller which has a short heat-up time, prevents damage from a fitting portion with a gear member, and is excellent in durability. . As a result of intensive studies to overcome the above-mentioned problems of the prior art, the present inventors have found that the above object can be achieved by providing a reinforcing portion at the fitting portion of the fixing roller. A specific example of the reinforcing portion is a method of providing a convex portion around a fitting portion having a shape such as a groove or a hole. As a method of providing the convex portion, there is a method of providing a thick portion, a bent portion (overhanging portion), a reinforcing member attaching portion, and the like. For example, the shape of an object to be fitted with a gear member is a groove or a hole, and at least a part of the peripheral portion of the groove or the hole is provided with an overhanging portion by bending for a predetermined length, thereby making the fixing roller thin. Can be effectively reinforced.
【００１０】薄肉円筒状芯金に、このような加工を行う
場合、先ず、プレス加工により所定形状よりも小さな溝
または穴を打ち抜き、次いで、該溝または穴に、絞り加
工用パンチを挿入して、溝または穴の周縁部を内側また
は外側に張り出すようにプレス絞り加工（曲げ加工）を
行う方法が、特に有効であることを見いだした。本発明
の定着ローラは、その本体を薄肉化しても、破損し易い
ギア部材との嵌合部が補強されているため、耐久性に優
れている。したがって、定着ローラの薄肉化によるヒー
トアップタイムの短縮化に寄与することができる。本発
明は、これらの知見に基づいて完成するに至ったもので
ある。When such processing is performed on a thin-walled cylindrical core metal, first, a groove or hole smaller than a predetermined shape is punched by pressing, and then a drawing punch is inserted into the groove or hole. It has been found that a method of performing press drawing (bending) so that the peripheral edge of the groove or hole is projected inward or outward is particularly effective. The fixing roller of the present invention is excellent in durability because the fitting portion with the gear member, which is easily damaged, is reinforced even if the main body of the fixing roller is thinned. Therefore, it is possible to contribute to shortening the heat-up time due to the thinning of the fixing roller. The present invention has been completed based on these findings.
【００１１】[0011]
【課題を解決するための手段】かくして、本発明によれ
ば、電子写真装置の定着部に用いられ、薄肉円筒状芯金
の外表面にフッ素樹脂の離型層が被覆された構造を有
し、その一端部には、駆動力を得るために取り付けられ
るギアが空回りするのを防ぐための嵌合部を設けた定着
ローラにおいて、該嵌合部が補強部を備えていることを
特徴とする定着ローラが提供される。Thus, according to the present invention, the structure is used in the fixing portion of an electrophotographic apparatus, and has a structure in which a release layer of fluororesin is coated on the outer surface of a thin cylindrical core metal. A fixing roller provided with a fitting portion at one end thereof for preventing a gear attached to obtain a driving force from idling, wherein the fitting portion is provided with a reinforcing portion. A fuser roller is provided.
【００１２】また、本発明によれば、電子写真装置の定
着部に用いられ、薄肉円筒状芯金の外表面にフッ素樹脂
の離型層が被覆された構造を有し、その一端部には、駆
動力を得るために取り付けられるギアが空回りするのを
防ぐための嵌合部を設けた定着ローラの製造方法におい
て、（１）薄肉円筒状芯金の一端部に、所定形状よりも
小さな溝または穴を切除処理により設けた後、（２）曲
げ加工により、前記溝また穴の周縁部の少なくとも一部
に、補強部となる張り出し部分を形成する工程を含むこ
とを特徴とする定着ローラの製造方法が提供される。Further, according to the present invention, it is used in a fixing portion of an electrophotographic apparatus and has a structure in which a release layer of fluororesin is coated on the outer surface of a thin cylindrical core metal, and one end of the structure has a structure. In a method of manufacturing a fixing roller having a fitting portion for preventing a gear attached to obtain a driving force from idling, (1) a groove smaller than a predetermined shape is formed at one end of a thin cylindrical cored bar. Alternatively, after the hole is provided by a cutting process, (2) a bending process is included to form an overhanging portion serving as a reinforcing portion in at least a part of the peripheral portion of the groove or the hole. A manufacturing method is provided.
【００１３】[0013]
【発明の実施の形態】以下、本発明について詳述する。
従来の薄肉円筒状芯金を用いた定着ローラは、通常、肉
厚（通紙部の肉厚）が１．０〜２．０ｍｍ程度である。
本発明の定着ローラは、従来品に補強部を形成したもの
を包含するが、補強部を設けることにより耐久性が向上
するため、肉厚を０．７ｍｍ以下、好ましくは０．３〜
０．７ｍｍの薄肉にすることが可能であり、これによっ
て、熱伝導性を高めて、ヒートアップタイムの短縮化を
達成することができる。芯金の肉厚の下限は、強度が低
下しすぎないようにするために、通常、０．３ｍｍ程度
までとする。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
A fixing roller using a conventional thin cylindrical cored bar usually has a thickness (thickness of a sheet passing portion) of about 1.0 to 2.0 mm.
The fixing roller of the present invention includes a conventional product in which a reinforcing portion is formed, but since the durability is improved by providing the reinforcing portion, the wall thickness is 0.7 mm or less, preferably 0.3 to
It is possible to make it as thin as 0.7 mm, which makes it possible to enhance the thermal conductivity and achieve a shortened heat-up time. The lower limit of the wall thickness of the core metal is usually set to about 0.3 mm in order to prevent the strength from being lowered too much.
【００１４】本発明の定着ローラの大きさ等は、電子写
真複写機の機種等により異なるが、薄肉化が可能である
ため、例えば、外径２０．０ｍｍφ、内径１９．０ｍｍ
φ、全長２５０ｍｍの定着ローラを例にとって、その製
造方法の概略を説明する。 （１）仕上がり外径２０．０ｍｍφに、０．３ｍｍの厚
みの削りしろを見込んだ、外径２０．６ｍｍφ、内径１
９．０ｍｍφのサイズにアルミニウム材を引き抜き、こ
れを２５２ｍｍの長さに切断して、アニール（例：４０
０℃、６０分間）する工程。アルミニウムの材質として
は、強度と切削性を加味して、Ａ５０５６材（Ａｌ−Ｍ
ｇ−Ｍｎ系）やＡ６０６３材（Ａｌ−Ｍｇ−Ｓｉ系）な
どの合金が好ましく使用される。ステンレスなど、アル
ミニウム以外の金属を使用してもよい。The size and the like of the fixing roller of the present invention differ depending on the model of the electrophotographic copying machine and the like, but since the thickness can be reduced, for example, the outer diameter is 20.0 mmφ and the inner diameter is 19.0 mm.
An outline of a manufacturing method of a fixing roller having a φ and a total length of 250 mm will be described. (1) A finished outer diameter of 20.0 mmφ with an allowance of 0.3 mm for a cutting allowance, outer diameter of 20.6 mmφ, inner diameter of 1
The aluminum material was pulled out to a size of 9.0 mmφ, cut into a length of 252 mm, and annealed (eg, 40 mm).
0 ° C., 60 minutes). As the material of aluminum, A5056 material (Al-M
Alloys such as g-Mn type) and A6063 material (Al-Mg-Si type) are preferably used. Metals other than aluminum, such as stainless steel, may be used.
【００１５】（２）アルミニウムの内側に耐熱性の黒色
塗料を塗装し、焼き付けする（例：４００℃、３０分
間）工程。この工程を独立して行うのではなく、前もっ
てアルミニウム芯金の内側に耐熱性の黒色塗料を塗装
し、前記工程（１）におけるアニール時に、同時に焼き
付けを行ってもよい。 （３）アルミニウム芯金を切削加工して、所定の形状
（外径２０．０ｍｍφ、内径１９．０ｍｍφ、全長２５
０ｍｍ）に仕上げる工程。切削工程では、転写紙のしわ
対策のため、通常、中央部の外径を両サイドの外径より
も５０〜２００μｍ細くした逆クラウン形状と呼ばれる
形状になるように切削加工を施す。また、この切削加工
時に、必要に応じて、芯金の端部にセットされるギアや
軸受の軸方向へのずれ防止のために、スナップリング固
定用のリング溝加工を行う場合もある。(2) A step of coating a heat-resistant black paint on the inside of aluminum and baking it (eg, 400 ° C., 30 minutes). Instead of performing this step independently, a heat-resistant black paint may be applied to the inside of the aluminum cored bar in advance, and baking may be performed simultaneously with the annealing in the step (1). (3) The aluminum cored bar is cut into a predetermined shape (outer diameter 20.0 mmφ, inner diameter 19.0 mmφ, total length 25).
0 mm) finishing process. In the cutting process, in order to prevent the wrinkles of the transfer paper, the cutting process is usually performed so that the outer diameter of the central portion is smaller than the outer diameters of both sides by 50 to 200 μm to form a shape called an inverted crown shape. In addition, during this cutting process, a ring groove for fixing the snap ring may be processed, if necessary, in order to prevent axial displacement of gears and bearings set at the ends of the cored bar.
【００１６】（４）切削加工後、プレス加工により、定
着ローラが駆動力を受けるギアが空回りしないようにキ
ー溝などの嵌合部を形成するための加工を行う工程。こ
の嵌合部は、ギアやギアのシャフトに形成された突起が
嵌合して、ギアに与えられた駆動力を、空回りすること
なく、定着ローラに伝える役割を果たすものであり、一
般に、定着ローラの端部にＵ字形のキー溝の形状に形成
されている。このようなギア部材との嵌合部は、溝形状
だけではなく、穴（開口、孔）形状であってもよい。嵌
合部が穴の場合、ギアと定着ローラは、ギアまたはギア
のシャフトに形成された突起あるいはピンなどを嵌合す
ることにより係合される。キー溝などの嵌合部は、一つ
に限らず、必要に応じて複数個つけることもできる。な
お、嵌合部の形成工程は、後記するように、フッ素樹脂
の被覆工程の後に行うことが好ましい場合がある。溝ま
たは穴には、補強のために張り出し部分等を設ける。(4) A step of forming a fitting portion such as a key groove by press working after cutting so as to prevent the gear receiving the driving force of the fixing roller from idling. The fitting portion has a function of transmitting a driving force applied to the gear to the fixing roller without idling, by fitting a protrusion formed on the gear or a shaft of the gear to the fixing roller. It is formed in the shape of a U-shaped keyway at the end of the roller. The fitting portion with such a gear member may have not only a groove shape but also a hole (opening, hole) shape. When the fitting portion is a hole, the gear and the fixing roller are engaged by fitting a protrusion or a pin formed on the gear or the shaft of the gear. The fitting portion such as the key groove is not limited to one, and a plurality of fitting portions may be provided as needed. In some cases, it is preferable that the fitting portion forming step be performed after the fluororesin covering step, as described later. Grooves or holes should be provided with overhangs for reinforcement.
【００１７】（５）以上のようにして仕上げられた芯金
の外表面上に、フッ素樹脂用プライマを塗装し、乾燥し
た後、その上に、フッ素樹脂塗料を塗装し（例：１５〜
２０μｍ程度の厚み）、焼成（例：３８０〜４００℃、
３０分間）する工程。フッ素樹脂としては、ＰＦＡ（四
フッ化エチレン−パーフロロアルコキシエチレン共重合
体）、ＰＴＦＥ（四フッ化エチレン樹脂）、ＦＥＰ（四
フッ化エチレン−六フッ化プロピレン共重合体）など
が、それぞれ単独で、あるいは２種以上を組み合わせて
使用される。フッ素樹脂に充填剤を配合することもで
き、乾燥や焼成条件も、種々に変更することができる。
フッ素樹脂の塗装は、通常、ディスパージョンで行われ
るが、粉体をそのまま塗装することもできる。芯金外表
面とフッ素樹脂被覆層との間に、所望によりシリコンゴ
ム層などの中間層を設けてもよい。補強部の形成工程の
前に、フッ素樹脂の離型層を被覆する場合には、この工
程を前記工程（４）の前に行う。 （６）フッ素樹脂の表面を研磨して所定の表面粗度に仕
上げる工程。表面を仕上げる方法は、特に限定されず、
必要のない場合には行わない。(5) A fluororesin primer is coated on the outer surface of the cored bar finished as described above, dried and then coated with a fluororesin paint (eg: 15 to 15).
Thickness of about 20 μm), firing (eg: 380 to 400 ° C.,
For 30 minutes). Examples of the fluororesin include PFA (tetrafluoroethylene-perfluoroalkoxyethylene copolymer), PTFE (tetrafluoroethylene resin), FEP (tetrafluoroethylene-hexafluoropropylene copolymer), etc. Or a combination of two or more. A filler can be mixed with the fluororesin, and the drying and firing conditions can be variously changed.
The coating of the fluororesin is usually performed by dispersion, but the powder can be coated as it is. If desired, an intermediate layer such as a silicone rubber layer may be provided between the outer surface of the cored bar and the fluororesin coating layer. When the release layer of fluororesin is coated before the step of forming the reinforcing portion, this step is performed before the step (4). (6) A step of polishing the surface of the fluororesin to obtain a predetermined surface roughness. The method of finishing the surface is not particularly limited,
Do not do if not necessary.
【００１８】本発明では、定着ローラのギア部材との嵌
合部に、補強部を形成する。嵌合部の形状は、通常、溝
または穴である。補強部としては、溝または穴の周囲に
形成された凸部を挙げることができる。凸部の形状とし
ては、例えば、肉厚部（肉盛り部）、折り曲げ部、補強
部材の貼り付け部などがあり、これらの組み合わせであ
ってもよい。さらに、補強部分は、溝や穴などの嵌合部
の周囲全体ではなく、補強効果が得られるならば、部分
的であってもよい。すなわち、張り出し部分などの補強
部は、溝または穴の周縁部の全体に設けることが好まし
いが、強度的に弱く、応力集中が起きやすい箇所にのみ
設けてもよい。以下に、補強部を備えた嵌合部の具体例
について、図面を参照しながら説明する。In the present invention, the reinforcing portion is formed at the fitting portion of the fixing roller with the gear member. The shape of the fitting portion is usually a groove or a hole. The reinforcing portion may include a convex portion formed around the groove or the hole. Examples of the shape of the convex portion include a thick portion (buildup portion), a bent portion, and a reinforcing member attaching portion, and a combination thereof may be used. Further, the reinforcing portion may be a partial portion as long as a reinforcing effect can be obtained, instead of the entire periphery of the fitting portion such as the groove or the hole. That is, the reinforcing portion such as the overhanging portion is preferably provided on the entire peripheral portion of the groove or hole, but it may be provided only on a portion where the strength is weak and stress concentration easily occurs. Hereinafter, a specific example of the fitting portion including the reinforcing portion will be described with reference to the drawings.
【００１９】図５の（ａ）に、Ｕ字溝１１を形成し、か
つ、内側に折り曲げ加工を行って、溝の周縁部に形成さ
れた張り出し部分１２によって溝を補強する例を示す。
図５の（ｂ）には、実施例で採用している溝及び張り出
し部分の形状や長さ、厚み等の寸法の具体例を示す。図
６には、穴開け加工をする際に、折り曲げ加工を行っ
て、穴１３の周囲に張り出し部分１４を形成して、穴を
補強する例を示す。図７には、カットした溝ではなく、
部分的に凹んだ形状の溝を作成し、この凹み部分の側部
と底部（内面から見ると凸部となる）１５により溝を補
強する例を示す。FIG. 5 (a) shows an example in which a U-shaped groove 11 is formed, an inward bending process is performed, and the groove is reinforced by an overhanging portion 12 formed at the peripheral portion of the groove.
FIG. 5B shows a specific example of dimensions such as the shape and the length and the thickness of the groove and the projecting portion used in the embodiment. FIG. 6 shows an example in which the hole is reinforced by bending it to form a projecting portion 14 around the hole 13. In Figure 7, not the cut groove,
An example will be shown in which a groove having a partially recessed shape is formed and the groove is reinforced by the side portion and the bottom portion (which becomes a convex portion when viewed from the inner surface) 15 of the recessed portion.
【００２０】図８には、Ｕ字溝１５の内周面側に肉厚部
（肉盛り部）１６を設けることにより、該溝を補強する
例を示す。図９には、肉盛り部を設けるかわりに、補強
部材１７を溝の周囲に貼り付けることにより、溝を補強
する例を示す。補強部材としては、芯金とは別の素材、
例えば、耐熱性樹脂や金属を用いることができる。図１
０には、穴の周囲にでっぱった補強部１８を設けること
により、該穴を補強する例を示す。この図１０には、実
施例で採用している補強部の設置箇所や多きさ等の寸法
の具体例を示す。FIG. 8 shows an example in which the U-shaped groove 15 is reinforced by providing a thick portion (buildup portion) 16 on the inner peripheral surface side thereof. FIG. 9 shows an example of reinforcing the groove by attaching a reinforcing member 17 around the groove instead of providing the built-up portion. As the reinforcing member, a material different from the core metal,
For example, heat resistant resin or metal can be used. FIG.
No. 0 shows an example in which the hole is reinforced by providing the reinforcing portion 18 protruding around the hole. FIG. 10 shows a concrete example of dimensions such as the installation location and the largeness of the reinforcing portion used in the embodiment.
【００２１】補強部は、例えば、図５（ａ）に示すよう
にＵ字溝（Ｕ字カット）であれば、そのカット部周囲
に、端部曲げ加工部をプレス加工等により形成すること
ができる。この場合、一体かつ同一素材からなる補強部
が容易に形成できるため、コスト上や加工性の点から好
ましい。補強部としては、他の素材、例えば、耐熱性樹
脂や金属を貼り付けたり、肉盛してもよい。ここで、同
一素材とは、焼き入れ、焼き鈍し、塑性変形等による組
織の変化も含むものである。補強部は、芯金の内側、外
側、あるいは両方に設けてもよく、場合によっては、折
り曲げ加工と肉盛りの両方を行うなど、上記補強方法を
組み合わせて適用してもよい。さらに、補強部は、例え
ば、Ｕ字溝の破損しやすい部分にのみ設けるなど、部分
的な補強部であってもよい。If the reinforcing portion is, for example, a U-shaped groove (U-shaped cut) as shown in FIG. 5A, an end bending portion may be formed around the cut portion by pressing or the like. it can. In this case, the reinforcing portion made of the same material can be easily formed, which is preferable in terms of cost and workability. As the reinforcing portion, another material, for example, a heat resistant resin or a metal may be attached or overlaid. Here, the same material includes changes in the structure due to quenching, annealing, plastic deformation and the like. The reinforcing portion may be provided on the inner side, the outer side, or both sides of the cored bar, and in some cases, the above reinforcing methods may be combined and applied, such as performing both bending and padding. Further, the reinforcing portion may be a partial reinforcing portion, such as being provided only in a portion of the U-shaped groove that is easily damaged.
【００２２】薄肉定着ローラの場合、フッ素樹脂の焼成
前に補強部の形成加工を行うと、加工時の変形や圧力等
に起因する応力が残り、この残留応力がフッ素樹脂被覆
形成工程での焼成時に解放されて、図１１（断面図）の
破線で示すような変形が生じる場合がある。このような
変形を避ける必要がある場合には、フッ素樹脂の焼成後
に補強部の形成加工を施すとよい。In the case of a thin fixing roller, if the reinforcing portion is formed before baking the fluororesin, stress due to deformation and pressure during processing remains, and the residual stress is baked in the fluororesin coating forming step. Sometimes it is released and a deformation as shown by the broken line in FIG. 11 (cross-sectional view) may occur. When it is necessary to avoid such deformation, it is advisable to perform the processing of forming the reinforcing portion after firing the fluororesin.
【００２３】本発明の定着ローラは、ギア嵌合部の形状
や補強部の形状等に応じて、種々の方法により作成する
ことができるが、図５及び図６に示すような構造の場
合、薄肉円筒状芯金の一端部に、所定形状よりも小さな
溝または穴を切除処理により設けた後、曲げ加工によ
り、前記溝また穴の周縁部の少なくとも一部に、補強部
となる張り出し部分（１２、１４）を形成する方法が好
ましい。より具体的には、所定の形状よりも小さな溝ま
たは穴を打ち抜き加工により設けた後、該溝または穴に
絞り加工用パンチを挿入して、溝または穴の周縁部の少
なくとも一部を内側または外側に張り出すように曲げ加
工を行う方法がある。The fixing roller of the present invention can be produced by various methods according to the shape of the gear fitting portion, the shape of the reinforcing portion, etc. In the case of the structure shown in FIGS. 5 and 6, A groove or hole smaller than a predetermined shape is formed in one end of the thin-walled cylindrical core metal by cutting, and then bending processing is performed to extend at least a part of the peripheral edge of the groove or the hole to be a reinforcing portion (a protruding portion ( The method of forming 12, 14) is preferred. More specifically, after forming a groove or hole smaller than a predetermined shape by punching, a drawing punch is inserted into the groove or hole, and at least a part of the peripheral portion of the groove or hole is placed inside or There is a method of bending so that it projects to the outside.
【００２４】この方法によれば、芯金の肉厚を容易に
０．７ｍｍ以下、好ましくは０．３〜０．７ｍｍとする
ことができる。このような薄肉化を図ることにより、定
着ローラの熱応答熱伝達性が飛躍的に高まり、ヒートア
ップタイムの大幅な短縮化を達成することができる。こ
の場合、芯金の肉厚に対する張り出し部分の長さの比を
１．５倍以上、好ましくは２．０倍以上とすることが望
ましい。この比の上限は、１０倍程度である。この比が
小さすぎると、芯金の肉厚が０．７ｍｍ以下と薄い場合
に、十分な耐久性を得ることが困難となる。この比が大
きすぎても、補強効果が飽和し、また、曲げ加工が困難
になる。張り出し部分の長さ（張出し長さ）は、図１２
及び図１３に示すように、曲げ加工を施した部分の厚み
をノギスにより測定するか、あるいは切断面から直接物
差しにより測定することができる。According to this method, the wall thickness of the core metal can be easily set to 0.7 mm or less, preferably 0.3 to 0.7 mm. By achieving such thinning, the heat-responsive heat transfer property of the fixing roller is dramatically improved, and the heat-up time can be significantly shortened. In this case, it is desirable that the ratio of the length of the overhanging portion to the wall thickness of the core metal is 1.5 times or more, preferably 2.0 times or more. The upper limit of this ratio is about 10 times. If this ratio is too small, it becomes difficult to obtain sufficient durability when the core metal has a thin thickness of 0.7 mm or less. If this ratio is too large, the reinforcing effect will be saturated and bending will be difficult. The length of the overhanging portion (overhanging length) is shown in FIG.
Also, as shown in FIG. 13, the thickness of the bent portion can be measured with a caliper, or can be measured directly with a ruler from the cut surface.
【００２５】薄肉円筒状芯金に、所定の形状よりも小さ
な溝または穴を打ち抜き加工により設けた後、該溝また
は穴に絞り加工用パンチを挿入して、溝または穴の周縁
部の少なくとも一部を内側または外側に張り出すように
曲げ加工を行うには、具体的には、以下のような方法が
挙げられる。図１４に示すように、ワークガイド１９と
打ち抜きダイ２０により芯金１を保持して、打ち抜きパ
ンチ２１により、芯金１の端部に所定の溝（または穴）
の形状よりも小さく打ち抜き加工（切除処理）を行う。
次に、図１５に示すように、芯金１をワークガイド１９
とワーククランプ２２で固定し、円筒状芯金の内側に絞
り加工ダイ２３を配置する。そして、図１６に示すよう
に、絞り加工用パンチ２４を溝（または穴）に挿入し
て、該溝（または穴）の周縁部の芯金を内側に張り出す
とともに、所定形状の溝（または穴）の大きさにする。After a groove or hole smaller than a predetermined shape is formed in the thin-walled cylindrical core metal by punching, a drawing punch is inserted into the groove or hole, and at least one of the peripheral portions of the groove or hole is inserted. In order to perform the bending process so that the portion projects inward or outward, specifically, the following method may be mentioned. As shown in FIG. 14, the work guide 19 and the punching die 20 hold the cored bar 1, and the punching punch 21 holds a predetermined groove (or hole) at the end of the cored bar 1.
Punching process (cutting process) smaller than the shape.
Next, as shown in FIG.
Then, the workpiece is clamped by the work clamp 22, and the drawing die 23 is arranged inside the cylindrical cored bar. Then, as shown in FIG. 16, the drawing punch 24 is inserted into the groove (or hole), the core metal of the peripheral portion of the groove (or hole) is projected to the inner side, and the groove (or the groove having a predetermined shape) is formed. Size).
【００２６】この製造方法によれば、一体かつ同一素材
からなる補強部が容易に形成できるため、コスト上や加
工性の点から好ましい。張り出し部分は、円筒状芯金の
内側だけではなく、外側または内外両側に設けてもよ
い。張り出し部分は、例えば、Ｕ字溝の破損しやすい部
分のみに設けるなど、部分的に形成してもよい。According to this manufacturing method, the reinforcing portion made of the same material can be easily formed, which is preferable in terms of cost and workability. The overhanging portion may be provided not only on the inner side of the cylindrical core metal, but also on the outer side or both the inner and outer sides. The overhanging portion may be partially formed, for example, provided only in a portion of the U-shaped groove where the U-shaped groove is easily damaged.
【００２７】[0027]
【実施例】以下に実施例を挙げて、本発明についてより
具体的に説明するが、本発明は、これらの実施例のみに
限定されるものではない。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
【００２８】［実施例１］アルミニウムＡ６０６３材
を、外径２０．６ｍｍφ、内径１９．０ｍｍφのサイズ
に引き抜き、内部の残留応力除去のための熱処理後、２
５２ｍｍの長さに切断し、アルミ素管を得た。このアル
ミ素管に、黒色耐熱塗料を塗装した。次いで、両端を切
削のセンタ保持ができるように面取り加工を行い、外径
の両端が２０．０ｍｍφで、中央部が１９．９ｍｍφの
逆クラウン形状となるように切削加工を施し、アルミ芯
金を得た（厚み＝０．５ｍｍ）。このアルミ芯金の一端
部に、図１４〜１６に示す方法により、汎用プレスを用
いてＵ字溝を打ち抜き、次いで、加工用パンチをＵ字溝
に挿入して周縁部を内側に張り出すように曲げ加工を行
った。このようにして、幅４ｍｍ、長さ６ｍｍのＵ字溝
であって、張り出し長さが０．７５ｍｍの張り出し部分
を有するＵ字溝（嵌合部）が形成された芯金を作成し
た。この芯金の中央部２２０ｍｍの範囲にサンドブラス
トを行い、フッ素樹脂プライマ（ダイキン工業製、ＴＣ
Ｗ−８８０８ＧＹ）を塗装し、１００℃で乾燥した後、
フッ素樹脂（ダイキン工業製、ＡＤ−２ＣＲ）を塗装
し、芯金温度３６０〜３８０℃にて３０分間焼成した
後、表面を研磨することにより、膜厚２０μｍ、表面粗
度１．０Ｓの離型層を形成した。以上のようにして得ら
れた定着ローラを、定着ユニットに組み込み、昇温させ
たところ、１５秒にて所定の温度に達し、トナーの定着
性も充分であった。さらに、１０万枚の耐久テスト実施
後も、定着ローラに破損はなかった。耐久テストの結果
を表１に示す。Example 1 Aluminum A6063 material was drawn into a size of 20.6 mmφ in outer diameter and 19.0 mmφ in inner diameter, and after heat treatment for removing the residual stress inside, 2
It was cut into a length of 52 mm to obtain an aluminum tube. A black heat resistant paint was applied to this aluminum tube. Next, both ends are chamfered so that the center of cutting can be held, and both ends of the outer diameter are 20.0 mmφ and the center part is cut into an inverted crown shape of 19.9 mmφ. Obtained (thickness = 0.5 mm). A U-shaped groove is punched out at one end of this aluminum core by a method shown in FIGS. 14 to 16 using a general-purpose press, and then a punch for processing is inserted into the U-shaped groove so that the peripheral edge is projected inward. Bent processing was performed. In this way, a cored bar having a U-shaped groove having a width of 4 mm and a length of 6 mm and having a U-shaped groove (fitting portion) having an overhanging portion having an overhanging length of 0.75 mm was prepared. Sandblasting is performed in the central area of 220 mm of this core metal, and a fluororesin primer (made by Daikin Industries, TC
W-8808GY) and then dried at 100 ° C,
A fluororesin (made by Daikin Industries, Ltd., AD-2CR) is coated, baked at a core metal temperature of 360 to 380 ° C. for 30 minutes, and then the surface is polished to obtain a mold release having a film thickness of 20 μm and a surface roughness of 1.0S. Layers were formed. When the fixing roller obtained as described above was assembled in a fixing unit and heated, the temperature reached a predetermined temperature in 15 seconds and the toner fixability was sufficient. Furthermore, the fixing roller was not damaged even after the durability test of 100,000 sheets. The results of the durability test are shown in Table 1.
【００２９】［実施例２〜３］張り出し部分の長さを表
１に示すように変えたこと以外は、実施例１と同様にし
て定着ローラを作成した。結果を表１に示す。[Examples 2 to 3] A fixing roller was prepared in the same manner as in Example 1 except that the length of the protruding portion was changed as shown in Table 1. The results are shown in Table 1.
【００３０】［比較例１］張り出し部分を設けなかった
こと以外は、実施例１と同様にして定着ローラを作成し
た。結果を表１に示す。[Comparative Example 1] A fixing roller was prepared in the same manner as in Example 1 except that the projecting portion was not provided. The results are shown in Table 1.
【００３１】[0031]
【表１】 （＊１）芯金の肉厚に対する張り出し部分の長さの比 （＊２）Ｕ字溝にクラックが発生するまでの定着枚数[Table 1] (* 1) Ratio of the length of the overhang to the thickness of the core metal (* 2) Number of fixed sheets before cracks occur in the U-shaped groove
【００３２】表１に示すように、本発明の定着ローラ
は、厚み０．５ｍｍという薄肉であるにもかかわらず、
１２万枚以上の耐久性を示す。したがって、本発明の定
着ローラは、優れた熱応答熱伝達性と耐久性を有するも
のである。なお、芯金の肉厚に対する張り出し部分の長
さの比を１．５未満にすると、肉厚が０．７ｍｍ以下の
薄肉芯金の場合、耐久性が低下する傾向を示す。As shown in Table 1, the fixing roller of the present invention has a thin thickness of 0.5 mm,
Shows durability of 120,000 sheets or more. Therefore, the fixing roller of the present invention has excellent thermal response heat transfer properties and durability. When the ratio of the length of the overhanging portion to the wall thickness of the cored bar is less than 1.5, the durability tends to decrease in the case of a thin cored bar having a wall thickness of 0.7 mm or less.
【００３３】［実施例４］実施例１と同様にして作成し
たアルミ芯金の中央部２２０ｍｍの範囲にサンドプラス
トを行い、フッ素樹脂プライマ（ダイキン工業製、ＴＣ
Ｗ−８８０８ＧＹ）を塗装し、１００℃で乾燥した後、
フッ素樹脂（ダイキン工業製、ＡＤ−２ＣＲ）を塗装
し、芯金温度３６０〜３８０℃にて３０分間焼成した
後、表面を研磨することにより、膜厚２０μｍ、表面粗
度１．０Ｓの離型層を形成した。次いで、図１０に示す
ように、芯金の一端部から１０ｍｍのところに、３ｍｍ
φの穴を開け、その外側に１ｍｍの張り出した補強部が
できるように加工を行った。以上のようにして得られた
定着ローラを、定着ユニットに組み込み、昇温させたと
ころ、１５秒にて所定の温度に達し、トナーの定着性も
充分であった。さらに、１０万枚の耐久テスト実施後
も、定着ローラに破損はなかった。[Embodiment 4] An aluminum core metal prepared in the same manner as in Embodiment 1 was sand-plasted in the central area of 220 mm, and a fluororesin primer (TC manufactured by Daikin Industries, TC
W-8808GY) and then dried at 100 ° C,
A fluororesin (manufactured by Daikin Industries, Ltd., AD-2CR) is coated, baked at a core metal temperature of 360 to 380 ° C. for 30 minutes, and then the surface is polished to obtain a mold release having a film thickness of 20 μm and a surface roughness of 1.0S. Layers were formed. Then, as shown in FIG. 10, 3 mm at 10 mm from one end of the core metal
A hole of φ was made, and processing was performed so that a 1 mm overhanging reinforcing portion was formed on the outside. When the fixing roller obtained as described above was assembled in a fixing unit and heated, the temperature reached a predetermined temperature in 15 seconds and the toner fixability was sufficient. Furthermore, the fixing roller was not damaged even after the durability test of 100,000 sheets.
【００３４】[0034]
【発明の効果】本発明によれば、ギア部材との嵌合部が
補強されて、耐久性が向上した定着ローラが提供され
る。本発明の定着ローラは、薄肉化した場合であって
も、破損し難いため、複写装置などにおけるヒートアッ
プの待ち時間の短縮化に寄与することができる。According to the present invention, there is provided a fixing roller in which the fitting portion with the gear member is reinforced and the durability is improved. The fixing roller of the present invention is less likely to be damaged even when it has a reduced thickness, and therefore can contribute to shortening the waiting time for heat-up in a copying machine or the like.
【図１】定着装置（定着部）の断面図である。FIG. 1 is a cross-sectional view of a fixing device (fixing unit).
【図２】ギアと定着ローラとの嵌合についての説明図で
ある。FIG. 2 is an explanatory diagram of fitting of a gear and a fixing roller.
【図３】定着ローラの外観図である。FIG. 3 is an external view of a fixing roller.
【図４】嵌合部（Ｕ字溝）の破損状況を示す説明図であ
る。FIG. 4 is an explanatory diagram showing a damage situation of a fitting portion (U-shaped groove).
【図５】嵌合部と補強部の具体例を示す説明図である。FIG. 5 is an explanatory diagram showing a specific example of a fitting portion and a reinforcing portion.
【図６】嵌合部と補強部の具体例を示す説明図である。FIG. 6 is an explanatory diagram showing a specific example of a fitting portion and a reinforcing portion.
【図７】嵌合部と補強部の具体例を示す説明図である。FIG. 7 is an explanatory diagram showing a specific example of a fitting portion and a reinforcing portion.
【図８】Ｕ字溝にの周縁部に肉盛り部（補強部）を設け
た例を示す説明図である。FIG. 8 is an explanatory diagram showing an example in which a built-up portion (reinforcing portion) is provided on the peripheral portion of the U-shaped groove.
【図９】Ｕ字溝に補強部材を貼り付けた例を示す説明図
である。FIG. 9 is an explanatory diagram showing an example in which a reinforcing member is attached to a U-shaped groove.
【図１０】穴の回りに補強部を形成した定着ローラの略
図である。FIG. 10 is a schematic view of a fixing roller having a reinforcing portion formed around a hole.
【図１１】定着ローラの断面の変形を示す説明図であ
る。FIG. 11 is an explanatory diagram showing a modification of a cross section of a fixing roller.
【図１２】張り出し部分の長さの測定法を示す図であ
る。FIG. 12 is a diagram showing a method for measuring the length of an overhang portion.
【図１３】張り出し部分の長さの測定法を示す図であ
る。FIG. 13 is a diagram showing a method for measuring the length of an overhanging portion.
【図１４】溝打ち抜き加工の説明図である。FIG. 14 is an explanatory diagram of a groove punching process.
【図１５】溝打ち抜き加工を行った芯金のワーククラン
プ状態を示す説明図である。FIG. 15 is an explanatory diagram showing a work clamp state of a cored bar that has been subjected to groove punching.
【図１６】溝に絞り加工用パンチを挿入することを示す
説明図である。FIG. 16 is an explanatory diagram showing insertion of a drawing punch into a groove.
１：定着ローラ ２：フッ素樹脂のコーティング範囲 ３：軸受 ４：軸受 ５：ヒータ ６：加圧ローラ（ゴムローラ） ７：駆動力を受けるために定着ロールに取り付けられる
ギア ８：定着ローラに駆動力を伝えるためのギア ９：ギアの空回りを防ぐための部分（例：Ｕ字溝） １０：Ｕ字溝がひび割れて破損した部分 １１：溝 １２：張り出し部分 １３：穴 １４：張り出し部分 １５：部分的に凹んだ形状の溝 １６：肉厚部 １７：貼り付け用補強部材 １８：穴の周囲にでっぱった補強部 １９：ワークガイド ２０：打ち抜きダイ ２１：打ち抜きパンチ ２２：ワーククランプ ２３：絞り加工ダイ ２４：絞り加工用パンチ1: Fixing roller 2: Fluorocarbon resin coating range 3: Bearing 4: Bearing 5: Heater 6: Pressure roller (rubber roller) 7: Gear attached to fixing roller to receive driving force 8: Driving force to fixing roller Gear for transmission 9: Part to prevent idling of gear (eg U-shaped groove) 10: Part where U-shaped groove is cracked and damaged 11: Groove 12: Overhanging part 13: Hole 14: Overhanging part 15: Partial 16: Thick part 17: Reinforcing member for attachment 18: Reinforcing part protruding around the hole 19: Work guide 20: Punching die 21: Punching punch 22: Work clamp 23: Drawing die 24 : Punch for drawing
フロントページの続き (72)発明者 加藤 千明 大阪府泉南郡熊取町大字野田950番地 住 友電気工業株式会社熊取製作所内 (72)発明者 中村 勝 山形県新庄市大字福田字福田山711−52 株式会社モリタ興産内 (72)発明者 石川 博之 山形県新庄市大字福田字福田山711−52 株式会社モリタ興産内Front page continuation (72) Inventor Chiaki Kato 950 Noda, Kumatori-cho, Sennan-gun, Osaka Prefecture Sumitomo Electric Industries, Ltd. Kumatori Manufacturing Co., Ltd. (72) Inventor Katsu Nakamura Yamagata Pref. Morita Kosan Co., Ltd. (72) Inventor Hiroyuki Ishikawa 711-52 Fukudayama, Fukuda, Shinjo City, Yamagata Prefecture Morita Kosan Co., Ltd.
Claims (6)
円筒状芯金の外表面にフッ素樹脂の離型層が被覆された
構造を有し、その一端部には、駆動力を得るために取り
付けられるギアが空回りするのを防ぐための嵌合部を設
けた定着ローラにおいて、該嵌合部が補強部を備えてい
ることを特徴とする定着ローラ。1. A structure used for a fixing part of an electrophotographic apparatus, comprising a thin-walled cylindrical cored bar having an outer surface coated with a release layer of fluororesin, one end of which has a driving force. A fixing roller provided with a fitting portion for preventing a gear attached to the wheel from idling, wherein the fitting portion includes a reinforcing portion.
部が溝または穴の周囲に設けられた凸部である請求項１
記載の定着ローラ。2. The fitting portion is a groove or a hole, and the reinforcing portion is a convex portion provided around the groove or the hole.
The fixing roller described.
ッ素樹脂の被覆層が形成された後に形成されたものであ
る請求項１または２記載の定着ローラ。3. The fixing roller according to claim 1, wherein the reinforcing portion is formed after a coating layer of fluororesin is formed on the outer surface of the thin cylindrical core metal bar.
であり、かつ、嵌合部が、溝または穴の周縁部の少なく
とも一部に、曲げ加工により補強部となる張り出し部分
を形成した形状を有し、薄肉円筒状芯金の肉厚に対する
張り出し部分の長さの比が１．５倍以上である請求項１
ないし３のいずれか１項に記載の定着ローラ。4. The thin cylindrical cored bar has a wall thickness of 0.7 mm or less, and the fitting portion has an overhanging portion which becomes a reinforcing portion by bending at least at a part of the peripheral portion of the groove or hole. The ratio of the length of the overhang portion to the wall thickness of the thin cylindrical cored bar having the formed shape is 1.5 times or more.
The fixing roller according to any one of items 1 to 3.
円筒状芯金の外表面にフッ素樹脂の離型層が被覆された
構造を有し、その一端部には、駆動力を得るために取り
付けられるギアが空回りするのを防ぐための嵌合部を設
けた定着ローラの製造方法において、（１）薄肉円筒状
芯金の一端部に、所定形状よりも小さな溝または穴を切
除処理により設けた後、（２）曲げ加工により、前記溝
また穴の周縁部の少なくとも一部に、補強部となる張り
出し部分を形成する工程を含むことを特徴とする定着ロ
ーラの製造方法。5. A structure used for a fixing portion of an electrophotographic apparatus, having a structure in which a release layer of a fluororesin is coated on the outer surface of a thin-walled cylindrical core metal, and one end thereof has a driving force. In a method of manufacturing a fixing roller provided with a fitting portion for preventing a gear attached to a wheel from idling, (1) a groove or hole smaller than a predetermined shape is cut off at one end of a thin cylindrical core metal. After providing, (2) a method of manufacturing a fixing roller, including a step of forming an overhanging portion serving as a reinforcing portion on at least a part of a peripheral portion of the groove or hole by bending.
小さな溝または穴を打ち抜き加工により設けた後、工程
（２）において、該溝または穴に絞り加工用パンチを挿
入して、溝または穴の周縁部の少なくとも一部を内側ま
たは外側に張り出すように曲げ加工を行う請求項５記載
の定着ローラの製造方法。6. In step (1), after forming a groove or hole smaller than a predetermined shape by punching, in step (2), a drawing punch is inserted into the groove or hole to form the groove or hole. The method for manufacturing a fixing roller according to claim 5, wherein the bending process is performed so that at least a part of the peripheral portion of the hole projects inward or outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19810695A JP3821503B2 (en) | 1995-01-11 | 1995-07-11 | Fixing roller and manufacturing method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-18639 | 1995-01-11 | ||
| JP1863995 | 1995-01-11 | ||
| JP19810695A JP3821503B2 (en) | 1995-01-11 | 1995-07-11 | Fixing roller and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08248798A true JPH08248798A (en) | 1996-09-27 |
| JP3821503B2 JP3821503B2 (en) | 2006-09-13 |
Family
ID=26355345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19810695A Expired - Lifetime JP3821503B2 (en) | 1995-01-11 | 1995-07-11 | Fixing roller and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3821503B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003054635A1 (en) * | 2001-12-20 | 2003-07-03 | Canon Finetech Inc. | Fixing roller and method of producing the same, fixing device and image forming device |
| EP1510883A1 (en) * | 2002-06-03 | 2005-03-02 | Fuji Xerox Co., Ltd. | Heat roller |
| JP2005182023A (en) * | 2003-12-16 | 2005-07-07 | Xerox Corp | Thin fixing roll assembly equipped with reinforced keyway, image forming system equipped with the roll assembly, and toner fixation process |
| JP2005182015A (en) * | 2003-12-16 | 2005-07-07 | Xerox Corp | Thin walled fuser roll with stress redirected from axial direction to radial direction |
| JP2021033138A (en) * | 2019-08-27 | 2021-03-01 | コニカミノルタ株式会社 | Roller, heating device, fixing device, image forming apparatus, and method for manufacturing roller |
-
1995
- 1995-07-11 JP JP19810695A patent/JP3821503B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003054635A1 (en) * | 2001-12-20 | 2003-07-03 | Canon Finetech Inc. | Fixing roller and method of producing the same, fixing device and image forming device |
| US7266337B2 (en) | 2001-12-20 | 2007-09-04 | Canon Finetech Inc. | Fixing roller, and method of producing the same, fixing device and image forming device |
| CN100367129C (en) * | 2001-12-20 | 2008-02-06 | 佳能精技股份有限公司 | Fixing roller and method of producing the same, fixing device and image forming device |
| EP1510883A1 (en) * | 2002-06-03 | 2005-03-02 | Fuji Xerox Co., Ltd. | Heat roller |
| EP1510883A4 (en) * | 2002-06-03 | 2009-03-25 | Fuji Xerox Co Ltd | Heat roller |
| EP2386916A1 (en) * | 2002-06-03 | 2011-11-16 | Fuji Xerox Co., Ltd | Heat roller |
| JP2005182023A (en) * | 2003-12-16 | 2005-07-07 | Xerox Corp | Thin fixing roll assembly equipped with reinforced keyway, image forming system equipped with the roll assembly, and toner fixation process |
| JP2005182015A (en) * | 2003-12-16 | 2005-07-07 | Xerox Corp | Thin walled fuser roll with stress redirected from axial direction to radial direction |
| JP4634128B2 (en) * | 2003-12-16 | 2011-02-16 | ゼロックス コーポレイション | Thin-walled fusing roll with stress reoriented from axial to circumferential direction |
| JP4721694B2 (en) * | 2003-12-16 | 2011-07-13 | ゼロックス コーポレイション | Thin fixing roll assembly with reinforced keyway, image forming system and toner fixing process comprising the same |
| JP2021033138A (en) * | 2019-08-27 | 2021-03-01 | コニカミノルタ株式会社 | Roller, heating device, fixing device, image forming apparatus, and method for manufacturing roller |
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| Publication number | Publication date |
|---|---|
| JP3821503B2 (en) | 2006-09-13 |
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