JP3474066B2 - Fixing roller - Google Patents
Fixing rollerInfo
- Publication number
- JP3474066B2 JP3474066B2 JP26036596A JP26036596A JP3474066B2 JP 3474066 B2 JP3474066 B2 JP 3474066B2 JP 26036596 A JP26036596 A JP 26036596A JP 26036596 A JP26036596 A JP 26036596A JP 3474066 B2 JP3474066 B2 JP 3474066B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- fixing roller
- bobbin
- wound around
- heat
- 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.)
- Expired - Fee Related
Links
Landscapes
- Fixing For Electrophotography (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、定着装置におけ
る定着ローラに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller in a fixing device.
【０００２】[0002]
【従来の技術】従来この種の定着ローラを具えた典型的
な定着装置は、この発明の実施形態が装着された図１に
示すようなものであって、１は定着ローラ、２は加圧ロ
ーラを示し、定着ローラ１は駆動回転される外筒３と、
その内部に定置されていて、外筒３を誘導発熱させるた
めのボビン４にコイル６を巻着した電磁誘導発熱機構７
とを有し、ボビン４は鉄、非鉄金属等の金属によって形
成されて中空断面を有し、軸受８によって外筒３を回転
可能に支持している。９はコイル６に電源10から給電す
るリード線、11は温度検知手段を示す。2. Description of the Related Art A typical fixing device provided with a fixing roller of this type is as shown in FIG. 1 in which an embodiment of the present invention is mounted, where 1 is a fixing roller and 2 is a pressure roller. A fixing roller 1 is an outer cylinder 3 which is driven and rotated,
An electromagnetic induction heating mechanism 7 which is placed inside thereof and has a coil 6 wound around a bobbin 4 for inductively heating the outer cylinder 3.
The bobbin 4 is made of metal such as iron or non-ferrous metal and has a hollow cross section. The bearing 8 rotatably supports the outer cylinder 3. Reference numeral 9 indicates a lead wire for supplying power to the coil 6 from the power source 10, and 11 indicates a temperature detecting means.
【０００３】[0003]
【発明が解決しようとする課題】ところでこのような定
着ローラ１においては、定着ローラ１が熱膨脹すると、
コイル６が延伸して弛緩し、この弛緩部分が外筒３の内
面に接触して、この接触した部分を損傷するという問題
がある。By the way, in such a fixing roller 1, when the fixing roller 1 thermally expands,
There is a problem that the coil 6 stretches and relaxes, and the relaxed portion contacts the inner surface of the outer cylinder 3 and damages the contacted portion.
【０００４】そこでこの発明の目的は、前記のような従
来の定着ローラのもつ問題を解消し、定着ローラの熱膨
脹によるコイルの延伸弛緩の発生を防止し、弛緩部分に
よって外筒の内面に接触して損傷することのない定着ロ
ーラを提供するにある。Therefore, an object of the present invention is to solve the problems of the conventional fixing roller as described above, to prevent the expansion and relaxation of the coil due to the thermal expansion of the fixing roller, and to contact the inner surface of the outer cylinder by the relaxing portion. It is to provide a fixing roller that is not damaged.
【０００５】[0005]
【課題を解決するための手段】この発明は、前記のよう
な目的を達成するために、駆動回転される外筒と、その
内部に定置されていて、外筒を誘導発熱させるためのボ
ビンにコイルを巻着した電磁誘導発熱機構とを有する定
着ローラにおいて、請求項１に記載の発明は、前記ボビ
ンは、熱膨張による外径の増加量がコイルの内径の増加
量と同じか、又はそれより大きい線膨脹係数を有する材
料によって構成されていることを特徴とするものであ
る。In order to achieve the above-mentioned object, the present invention provides an outer cylinder that is driven and rotated, and a bobbin that is fixed inside and that causes the outer cylinder to generate heat. In a fixing roller having an electromagnetic induction heating mechanism around which a coil is wound, the invention according to claim 1 is such that the bobbin has an increase in outer diameter due to thermal expansion equal to an increase in inner diameter of the coil, or It is characterized in that it is made of a material having a larger linear expansion coefficient.
【０００６】請求項２に記載の発明は、ボビンは、その
外周に設けられた弾性層を有し、巻着前の前記弾性層の
外径が、コイル巻着後のコイルの内径より大きくなって
いることを特徴とするものである。According to the second aspect of the invention, the bobbin has an elastic layer provided on the outer periphery thereof, and the outer diameter of the elastic layer before winding is larger than the inner diameter of the coil after winding. It is characterized by that.
【０００７】請求項３に記載の発明は、ボビンにコイル
を巻着するときの環境温度を、定着ローラの加熱温度と
したことを特徴とするものである。The invention according to claim 3 is characterized in that the environmental temperature when the coil is wound around the bobbin is set to the heating temperature of the fixing roller.
【０００８】請求項４に記載の発明は、ボビンにコイル
を巻着した後、コイルの外側に高耐熱性で、円筒形の熱
収縮チューブを被覆したことを特徴とするものである。The invention according to claim 4 is characterized in that, after the coil is wound around the bobbin, a highly heat-resistant, cylindrical heat-shrinkable tube is coated on the outside of the coil.
【０００９】請求項５に記載の発明は、ボビンが、中実
断面を有することを特徴とするものである。The invention according to a fifth aspect is characterized in that the bobbin has a solid cross section.
【００１０】請求項６に記載の発明は、ボビンが、耐熱
性樹脂によって構成されていることを特徴とするもので
ある。The invention according to claim 6 is characterized in that the bobbin is made of a heat-resistant resin.
【００１１】[0011]
【発明の実施の形態】この発明の実施の形態を図面を参
照して説明する。各実施形態において、前記従来のもの
と同様の部分には同一の符号を付して説明を省略し、主
として異なる部分について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. In each embodiment, the same parts as those of the conventional one are designated by the same reference numerals, and the description thereof will be omitted. The different parts will be mainly described.
【００１２】図２に示す第１実施形態は、ボビン４が中
空断面を有し、その外周にコイル６が巻着されており、
図３に示す第２実施形態は、ボビン４′が中実断面を有
し、それらの外周にコイル６が巻着されている。ボビン
４′は中実断面を有することから、定着ローラ１の加熱
によって膨脹の際の、外径の増加量がボビン４のそれよ
り大きいので、巻着されているコイル６の弛緩発生防止
効率が、ボビン４より大きくなる。In the first embodiment shown in FIG. 2, the bobbin 4 has a hollow cross section, and the coil 6 is wound around the outer circumference thereof.
In the second embodiment shown in FIG. 3, the bobbin 4'has a solid cross section, and the coil 6 is wound around the outer circumference thereof. Since the bobbin 4'has a solid cross section, the amount of increase in outer diameter when the fixing roller 1 is expanded by heating is larger than that of the bobbin 4, so that the loosening prevention efficiency of the wound coil 6 is improved. , Larger than the bobbin 4.
【００１３】このような第１，２実施形態は、ボビン４
又は４′が中空であるか、又は中実であるかという点で
相違するだけであるので、以下はこれらの代表として第
１実施形態を採り、これによって両形態について説明を
することとする。In the first and second embodiments as described above, the bobbin 4 is used.
Or 4'is hollow or solid, only the first embodiment will be described below as a representative of these, and both forms will be described below.
【００１４】これらのボビン４及びコイル６は、図４に
示すように、ボビン４及びコイル６の定着ローラ１の加
熱によって膨脹する前の外径及び内径をｄ１及びｄ２と
し、図５に示すように、同膨脹した後の外径及び内径を
Ｄ１及びＤ２とすると、ボビン４の熱膨張による外径の
増加量Ｄ１−ｄ１が、コイル６の熱膨張による内径の増
加量Ｄ２−ｄ２と同じか、又はそれより大きいすなわち
Ｄ１−ｄ１≧Ｄ２−ｄ２の関係にある線膨脹係数を有す
る材料によって構成されている。これにより定着ローラ
１の加熱によってもコイル６の弛緩が発生しない。As shown in FIG. 4, the bobbin 4 and the coil 6 have outer and inner diameters d1 and d2 before being expanded by heating of the fixing roller 1 of the bobbin 4 and the coil 6, respectively, as shown in FIG. If the outer diameter and the inner diameter after the expansion are D1 and D2, whether the increase amount D1-d1 of the outer diameter due to the thermal expansion of the bobbin 4 is the same as the increase amount D2-d2 of the inner diameter due to the thermal expansion of the coil 6. , Or higher, that is, D1-d1 ≧ D2-d2. As a result, the coil 6 does not relax even when the fixing roller 1 is heated.
【００１５】図６，７に示す第３実施形態は、ボビン４
は、その外周に設けられた弾性層12を有し、図６に示す
巻着前の弾性層12の外径ｄ３が、図７に示すコイル巻着
後のコイル６の内径Ｄ３より大きく、すなわちｄ３＞Ｄ
３の関係となっている。これにより定着ローラ１の加熱
によってコイル６が膨脹して、その内径Ｄ３が大きくな
っても、コイル６の弛緩が発生しない。In the third embodiment shown in FIGS. 6 and 7, the bobbin 4 is used.
Has an elastic layer 12 provided on the outer periphery thereof, and the outer diameter d3 of the elastic layer 12 before winding shown in FIG. 6 is larger than the inner diameter D3 of the coil 6 after coil winding shown in FIG. d3> D
There are 3 relationships. Therefore, even if the coil 6 expands due to the heating of the fixing roller 1 and the inner diameter D3 thereof increases, the coil 6 does not loosen.
【００１６】前記のような各実施形態を構成するに際し
ては、ボビン４にコイル６を巻着するときの環境温度
を、定着ローラ１の加熱温度としている。これにより定
着ローラ１の加熱によってもコイル６の弛緩が発生しな
い。In constructing each of the embodiments described above, the environmental temperature when the coil 6 is wound around the bobbin 4 is the heating temperature of the fixing roller 1. As a result, the coil 6 does not relax even when the fixing roller 1 is heated.
【００１７】図８に示す第４実施形態は、ボビン４にコ
イル６を巻着した後、コイル６の外側に高耐熱性で、円
筒形の熱収縮チューブ13を被覆したものである。これに
より定着ローラ１の加熱時におけるコイル６の熱膨脹に
よる外径の変化を、熱収縮チューブ13の内径の収縮で相
殺し、ボビン４に巻着されているコイル６の弛緩が発生
しない。In the fourth embodiment shown in FIG. 8, after the coil 6 is wound around the bobbin 4, a highly heat-resistant, cylindrical heat-shrinkable tube 13 is coated on the outside of the coil 6. As a result, the change in the outer diameter due to the thermal expansion of the coil 6 when the fixing roller 1 is heated is canceled by the contraction of the inner diameter of the heat-shrinkable tube 13, so that the coil 6 wound around the bobbin 4 does not loosen.
【００１８】図示を省略した第５実施形態は、ボビン４
が、耐熱性樹脂によって構成されているものである。こ
のようなものは、ボビン４に巻着されているコイル６の
弛緩発生が防止されるのに加えて、高温に耐えることが
できて寿命が長く、さらに鉄、非鉄金属等に比べて軽量
であって、全体の軽量化が図れる。The fifth embodiment, not shown, is a bobbin 4
Is made of a heat resistant resin. In addition to preventing loosening of the coil 6 wound around the bobbin 4, such a product can withstand high temperatures and has a long life, and is lighter in weight than ferrous or non-ferrous metal. Therefore, the overall weight can be reduced.
【００１９】[0019]
【発明の効果】この発明は上記のようであって、駆動回
転される外筒と、その内部に定置されていて、外筒を誘
導発熱させるためのボビンにコイルを巻着した電磁誘導
発熱機構とを有する定着ローラにおいて、請求項１に記
載の発明は、前記ボビンは、熱膨張による外径の増加量
がコイルの内径の増加量と同じか、又はそれより大きい
線膨脹係数を有する材料によって構成されているので、
定着ローラの加熱によってもコイルの弛緩が発生しない
という効果がある。The present invention is as described above, and the electromagnetic induction heating mechanism in which a coil is wound around a bobbin for driving the outer cylinder to be driven and rotated and for inducing heat generation in the outer cylinder. According to the invention of claim 1, the bobbin is made of a material having a linear expansion coefficient in which an increase in outer diameter due to thermal expansion is equal to or larger than an increase in inner diameter of the coil. Because it is configured
There is an effect that the coil does not relax even when the fixing roller is heated.
【００２０】請求項２に記載の発明は、ボビンは、その
外周に設けられた弾性層を有し、巻着前の前記弾性層の
外径が、コイル巻着後のコイルの内径より大きくなって
いるので、定着ローラの加熱によってコイルが膨脹し
て、その内径が大きくなっても、コイルの弛緩が発生し
ないという効果がある。According to a second aspect of the present invention, the bobbin has an elastic layer provided on the outer periphery thereof, and the outer diameter of the elastic layer before winding is larger than the inner diameter of the coil after winding. Therefore, there is an effect that the coil does not relax even if the inner diameter of the coil expands due to the heating of the fixing roller.
【００２１】請求項３に記載の発明は、ボビンにコイル
を巻着するときの環境温度を、定着ローラの加熱温度と
したので、定着ローラの加熱によってもコイルの弛緩が
発生しないという効果がある。According to the third aspect of the present invention, since the environmental temperature when the coil is wound around the bobbin is set to the heating temperature of the fixing roller, there is an effect that the coil does not relax even when the fixing roller is heated. .
【００２２】請求項４に記載の発明は、ボビンにコイル
を巻着した後、コイルの外側に高耐熱性で、円筒形の熱
収縮チューブを被覆したので、定着ローラの加熱時にお
けるコイルの熱膨脹による外径の変化を、熱収縮チュー
ブの内径の収縮で相殺し、ボビンに巻着されているコイ
ルの弛緩が発生しないという効果がある。According to the fourth aspect of the present invention, after the coil is wound around the bobbin, the outer side of the coil is covered with a highly heat-resistant, cylindrical heat-shrinkable tube, so that the thermal expansion of the coil when the fixing roller is heated. The change in the outer diameter due to the above is offset by the contraction of the inner diameter of the heat-shrinkable tube, so that the coil wound around the bobbin is not loosened.
【００２３】請求項５に記載の発明は、ボビンが、中実
断面を有するので、定着ローラの加熱によって膨脹の際
の、外径の増加量が中空断面のものより大きいので、巻
着されているコイルの弛緩発生防止効率が良いという効
果がある。According to the fifth aspect of the present invention, since the bobbin has a solid cross section, the amount of increase in the outer diameter when expanded by heating the fixing roller is larger than that of the hollow cross section. There is an effect that the relaxation prevention efficiency of the coil is good.
【００２４】請求項６に記載の発明は、ボビンが、耐熱
性樹脂によって構成されているので、ボビンに巻着され
ているコイルの弛緩発生が防止されるのに加えて、高温
に耐えることができて寿命が長く、また金属に比べて軽
量であって、定着ローラ全体の軽量化が図れるという効
果がある。According to the sixth aspect of the invention, since the bobbin is made of a heat-resistant resin, the coil wound around the bobbin is prevented from being loosened, and in addition, it can withstand high temperatures. It has a long life, is lighter than metal, and has the effect of reducing the weight of the entire fixing roller.
【図１】この発明の実施形態が装着された定着装置の１
例の一部縦断正面図である。FIG. 1 is a fixing device 1 to which an embodiment of the present invention is attached.
It is a partial longitudinal front view of an example.
【図２】この発明の第１実施形態の縦断面図である。FIG. 2 is a vertical sectional view of the first embodiment of the present invention.
【図３】この発明の第２実施形態の図２と同様の縦断面
図である。FIG. 3 is a vertical sectional view similar to FIG. 2 of the second embodiment of the present invention.
【図４】この発明の第１実施形態のボビンとコイルとの
加熱前の縦断面図である。FIG. 4 is a vertical sectional view of the bobbin and the coil according to the first embodiment of the present invention before heating.
【図５】同上の加熱時の縦断面図である。FIG. 5 is a vertical cross-sectional view of the same when heating.
【図６】この発明の第３実施形態のボビンのコイル巻着
前の縦断面図である。FIG. 6 is a vertical sectional view of a bobbin according to a third embodiment of the present invention before coil winding.
【図７】同上のコイル巻着後の縦断面図である。FIG. 7 is a vertical cross-sectional view after winding the same coil.
【図８】この発明の第４実施形態の縦断面図である。FIG. 8 is a vertical sectional view of a fourth embodiment of the present invention.
１ 定着ローラ ２ 加圧ローラ
３ 外筒 ４ ボビン
６ コイル ７ 電磁誘導発熱機
構
12 弾性層 13 熱収縮チューブ1 fixing roller 2 pressure roller 3 outer cylinder 4 bobbin 6 coil 7 electromagnetic induction heating mechanism 12 elastic layer 13 heat shrink tube
Claims (6)
されていて、外筒を誘導発熱させるためのボビンにコイ
ルを巻着した電磁誘導発熱機構とを有する定着ローラに
おいて、前記ボビンは、熱膨張による外径の増加量がコ
イルの内径の増加量と同じか、又はそれより大きい線膨
脹係数を有する材料によって構成されていることを特徴
とする定着ローラ。1. A fixing roller having an outer cylinder which is driven and rotated, and an electromagnetic induction heating mechanism which is fixed inside the outer cylinder and has a coil wound around a bobbin for inducing heat generation in the outer cylinder. A fixing roller comprising a material having a linear expansion coefficient in which an increase in outer diameter due to thermal expansion is equal to or larger than an increase in inner diameter of the coil.
を有し、巻着前の前記弾性層の外径が、コイル巻着後の
コイルの内径より大きくなっていることを特徴とする請
求項１に記載の定着ローラ。2. The bobbin has an elastic layer provided on the outer periphery thereof, and the outer diameter of the elastic layer before winding is larger than the inner diameter of the coil after winding the coil. The fixing roller according to claim 1.
度を、定着ローラの加熱温度としたことを特徴とする請
求項１又は２に記載の定着ローラ。3. The fixing roller according to claim 1, wherein the environmental temperature when the coil is wound around the bobbin is the heating temperature of the fixing roller.
外側に高耐熱性で、円筒形の熱収縮チューブを被覆した
ことを特徴とする請求項１ないし３のいずれかに記載の
定着ローラ。4. The fixing roller according to claim 1, wherein after the coil is wound around the bobbin, a highly heat-resistant, cylindrical heat-shrinkable tube is coated on the outside of the coil. .
とする請求項１ないし４のいずれかに記載の定着ロー
ラ。5. The fixing roller according to claim 1, wherein the bobbin has a solid cross section.
ていることを特徴とする請求項１ないし５のいずれかに
記載の定着ローラ。6. The fixing roller according to claim 1, wherein the bobbin is made of a heat resistant resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26036596A JP3474066B2 (en) | 1996-10-01 | 1996-10-01 | Fixing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26036596A JP3474066B2 (en) | 1996-10-01 | 1996-10-01 | Fixing roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10104983A JPH10104983A (en) | 1998-04-24 |
| JP3474066B2 true JP3474066B2 (en) | 2003-12-08 |
Family
ID=17346928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26036596A Expired - Fee Related JP3474066B2 (en) | 1996-10-01 | 1996-10-01 | Fixing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3474066B2 (en) |
-
1996
- 1996-10-01 JP JP26036596A patent/JP3474066B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10104983A (en) | 1998-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5752150A (en) | Heating apparatus | |
| JPS63106682A (en) | Heat roll for electrophotography | |
| JP3997025B2 (en) | Fixing device | |
| US6518552B2 (en) | Fixing device using induction heating in image forming system | |
| EP0989473B1 (en) | Induction heating type fixing device and method of producing an induced current generating member therefor | |
| JP3556287B2 (en) | Induction heating roller device | |
| US6292648B1 (en) | Fixing device using induction heating for image forming apparatus | |
| JP3474066B2 (en) | Fixing roller | |
| JP3756261B2 (en) | Induction heating roller device | |
| JP3629356B2 (en) | Fixing device | |
| IE904168A1 (en) | Roll for a device for the continuous casting of thin metal¹strips | |
| JP3555823B2 (en) | Fixing device | |
| JP3497444B2 (en) | Image forming device | |
| JP3466529B2 (en) | Fixing device | |
| JPH06128623A (en) | Heating roll | |
| JPH10142985A (en) | Induction heat generating roller | |
| JP3701763B2 (en) | Induction heating roller | |
| JP2001312163A (en) | Image forming device | |
| JP3742807B2 (en) | Fixing roller and fixing device | |
| JP4015689B2 (en) | Fixing device, image forming device | |
| JP2001242727A (en) | Fixing device and image forming device | |
| JP4068132B2 (en) | Fixing device, image forming device | |
| KR920006988B1 (en) | Heat roll for electro-photography | |
| JPH09306652A (en) | Induction heating roller | |
| JP2003076191A (en) | Heat fixing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080919 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080919 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090919 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090919 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110919 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120919 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130919 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |