JPH0519711B2 - - Google Patents
Info
- Publication number
- JPH0519711B2 JPH0519711B2 JP60167213A JP16721385A JPH0519711B2 JP H0519711 B2 JPH0519711 B2 JP H0519711B2 JP 60167213 A JP60167213 A JP 60167213A JP 16721385 A JP16721385 A JP 16721385A JP H0519711 B2 JPH0519711 B2 JP H0519711B2
- Authority
- JP
- Japan
- Prior art keywords
- heating roller
- heat
- heating
- recording paper
- inner cylinder
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 48
- 229910052736 halogen Inorganic materials 0.000 description 9
- 150000002367 halogens Chemical class 0.000 description 9
- 238000009826 distribution Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 230000037330 wrinkle prevention Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Fax Reproducing Arrangements (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、フアクシミリ装置や複写機、プリン
ター等の情報記録機器における加熱ローラ定着装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heating roller fixing device for information recording equipment such as facsimile machines, copying machines, and printers.
［従来の技術］
従来の情報記録装置における加熱ローラ定着装
置において第２図〜第４図を参照しながら説明す
る。[Prior Art] A heating roller fixing device in a conventional information recording apparatus will be described with reference to FIGS. 2 to 4.
第２図は一般の情報記録機器における加熱ロー
ラ定着装置の概略側面図である。記録紙３上に
は、定着の前段階として図示しない記録装置およ
び現像装置によつて、読取装置が読み取つた原稿
の文字等に相当する位置にトナー４が付着してい
る。 FIG. 2 is a schematic side view of a heating roller fixing device in a general information recording device. Toner 4 is adhered to the recording paper 3 by a recording device and a developing device (not shown) in a pre-fixing stage at positions corresponding to the characters of the document read by the reading device.
しかしながら、このトナー４の記録紙３に対す
る吸着力は非常に弱く、安定した記録画像を得る
ために熱または圧力等を利用し定着させる必要が
ある。 However, the adsorption force of this toner 4 to the recording paper 3 is very weak, and it is necessary to fix it using heat, pressure, etc. in order to obtain a stable recorded image.
加熱ローラ１の内部には、ハロゲンランプ等の
熱源２が内挿されており、該熱源２によつて加熱
ローラ１は熱せられる。５は記録紙３を加熱ロー
ラ１に圧接するための加圧ローラであり、記録紙
３は加熱ローラ１の矢印Ａ方向への回転、および
加圧ローラ５の矢印Ｂ方向への回転により矢印Ｃ
方向に搬送される。記録紙３は搬送される途中で
加熱ローラ１と接し、その上に付着しているトナ
ー４は加熱ローラ１の熱により記録紙３に融着さ
れる。 A heat source 2 such as a halogen lamp is inserted inside the heating roller 1, and the heating roller 1 is heated by the heat source 2. Reference numeral 5 denotes a pressure roller for pressing the recording paper 3 against the heating roller 1, and the recording paper 3 is pressed against the arrow C by the rotation of the heating roller 1 in the direction of arrow A and the rotation of the pressure roller 5 in the direction of arrow B.
conveyed in the direction. The recording paper 3 comes into contact with the heating roller 1 while being conveyed, and the toner 4 adhering thereto is fused to the recording paper 3 by the heat of the heating roller 1.
ところで、このように熱を利用してトナー４を
記録紙３に定着させるような加熱ローラ定着装置
においては、加熱ローラ１の表面温度を常に予め
定められた定着温度に保持するため該ローラの表
面温度を検地する温度検地素子６を設けて、これ
よりの信号により制御機構を介して前記ハロゲン
ランプ等の熱源２の作動を制御し、以つて加熱ロ
ーラ１の表面温度を一定にするようにしている。 By the way, in a heating roller fixing device that uses heat to fix the toner 4 on the recording paper 3, the surface temperature of the heating roller 1 is constantly maintained at a predetermined fixing temperature. A temperature detection element 6 for detecting temperature is provided, and a signal from the temperature detection element 6 is used to control the operation of the heat source 2 such as a halogen lamp through a control mechanism, thereby keeping the surface temperature of the heating roller 1 constant. There is.
しかしながら前記ハロゲンランプはそのフイラ
メントコイルが加熱ローラ１の軸に沿うように配
設されているが、このフイラメントの全体が均一
な発熱部である場合は、加熱ローラ１の長さ方向
の温度分布が第３図に示すように両端部分におけ
る放熱が大きいため中央部分が両端部分より高い
ものになり、この結果、加熱ローラ１はその全長
に亘り均一な加熱効果を得ることができず、又記
録紙３上のトナーが全画面にわたつて完全に融着
されるためには温度の低くなる両端部分において
も十分な融着温度を保たねばならず、中央部の温
度が必要以上に高くなり、この結果記録紙３の水
分の蒸発による収縮度が部分的に異なることによ
るシワの発生を見ることとなる。 However, in the halogen lamp, the filament coil is arranged along the axis of the heating roller 1, but if the entire filament is a uniform heat generating part, the temperature distribution in the length direction of the heating roller 1 is As shown in FIG. 3, since the heat dissipation is large at both end portions, the center portion is higher than both end portions, and as a result, the heating roller 1 cannot obtain a uniform heating effect over its entire length, and the recording paper In order for the above toner to be completely fused over the entire screen, a sufficient fusion temperature must be maintained even at both ends where the temperature is low, and the temperature in the center becomes higher than necessary. As a result, wrinkles appear due to local differences in the degree of shrinkage of the recording paper 3 due to evaporation of moisture.
従来のこのような欠点を避けるためには加熱ロ
ーラ１及びハロゲンランプ等の熱源２の長さを記
録紙３の幅に較べ十分長くして中央部の熱分布の
比較的平坦な部分を使用したり、ハロゲンランプ
等の熱源２のフイラメント２′のコイル密度を中
央部は疎に両端部は密にすることにより第４図の
ような発熱特性をもたせ加熱ローラ１表面の温度
を略一定に保つ方法がある。 In order to avoid such drawbacks of the conventional method, the length of the heating roller 1 and the heat source 2 such as a halogen lamp should be made sufficiently longer than the width of the recording paper 3, and a central part where the heat distribution is relatively flat should be used. Or, by making the coil density of the filament 2' of the heat source 2, such as a halogen lamp, sparse in the center and dense at both ends, the heat generating characteristics shown in Fig. 4 can be obtained, and the temperature on the surface of the heating roller 1 can be kept approximately constant. There is a way.
上述した従来の熱ローラ定着装置では、記録紙
３の幅に較べ加熱ローラ１の長さを十分に長くと
る必要から装置全体が大きくなつたり、ヒーター
のコイルの密度を変えることの製造上の困難があ
り、又両端部分を高温にするためハロゲンランプ
党の熱源２の碍子が高熱のため悪影響を受け寿命
が短くなる等の欠点があつた。
In the conventional heat roller fixing device described above, the length of the heating roller 1 must be sufficiently long compared to the width of the recording paper 3, which increases the size of the entire device and makes it difficult to manufacture by changing the density of the heater coil. Moreover, since both end portions are heated to high temperatures, the insulator of the heat source 2 of the halogen lamp is adversely affected by the high heat, resulting in a shortened lifespan.
［問題点の解決手段］
本発明は、上記従来の問題点を解決するために
なされたもので、装置全体を大きくすることな
く、ローラ表面温度を略一定にし、記録紙のシワ
防止に対してより信頼性の高いものを提供せんと
するものである。[Means for Solving Problems] The present invention was made to solve the above-mentioned conventional problems, and it is possible to keep the roller surface temperature approximately constant and prevent wrinkles on recording paper without increasing the size of the entire device. The aim is to provide something more reliable.
そのために、本発明は、内部に加熱素子を有す
る回転加熱ローラと、該加熱ローラに圧着しなが
ら回転可能に付設した加圧ローラとを備える加熱
ローラ定着装置において、記録紙と当接する加熱
ローラの外側円筒内に内側円筒を圧入せしめ、且
つ外側内筒と内側円筒との間で軸方向中央部に空
隙を形成したことを特徴とする加熱ローラ定着装
置を提供せんとするものである。 To this end, the present invention provides a heating roller fixing device comprising a rotating heating roller having a heating element inside and a pressure roller rotatably attached to the heating roller while being pressed against the heating roller. It is an object of the present invention to provide a heating roller fixing device characterized in that an inner cylinder is press-fitted into an outer cylinder, and a gap is formed at the center in the axial direction between the outer inner cylinder and the inner cylinder.
［実施例］
次に、本発明の実施例について図面を参照して
説明する。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図は本考案の一実施例の断面図である。 FIG. 1 is a sectional view of an embodiment of the present invention.
加熱ローラ１′は外側円筒１ａの内に外径軸方
向中央部がテーパ凹状の内側円筒１ｂを圧入して
一体化しており、この外側円筒１ａと内側円筒１
ｂとの間に、上記テーパ凹状部によつて空隙１ｃ
を形成するようにしている。 The heating roller 1' is integrated by press-fitting an inner cylinder 1b having a tapered concave central portion in the axial direction of the outer cylinder 1a into an outer cylinder 1a.
b, a gap 1c is created by the tapered concave portion.
We are trying to form a
ハロゲンランプ等の熱源２から放射される熱は
加熱ローラ１′の内径壁から表面に向つて伝導さ
れるが、加熱ローラ１′の両端部においては内側
円筒１ｂから外側円筒１ａには両円筒の接触によ
る伝導伝熱によつて熱が移動するが、中央部にお
いては空隙１ｃの輻射伝熱によるため熱抵抗が大
きくなり、中央部における温度降下が両端部より
大きくなる。 Heat radiated from a heat source 2 such as a halogen lamp is conducted from the inner diameter wall of the heating roller 1' toward the surface, but at both ends of the heating roller 1', the inner cylinder 1b is transferred from the outer cylinder 1a to the outer cylinder 1a. Heat is transferred by conductive heat transfer due to contact, but thermal resistance increases in the center due to radiant heat transfer in the void 1c, and the temperature drop in the center becomes larger than at both ends.
よつてこのときの内側円筒１ｂの凹状部のテー
パ量を、凹状部がなく肉厚が一定の場合に表面温
度分布が中央部において高く両端部において低く
なることを補償するように設定することにより、
表面温度分布を略一定に保つことができる。 Therefore, by setting the taper amount of the concave portion of the inner cylinder 1b at this time to compensate for the fact that when there is no concave portion and the wall thickness is constant, the surface temperature distribution is high at the center and low at both ends. ,
The surface temperature distribution can be kept approximately constant.
又、実施例においては加工の容易さという点で
内側円筒１ｂの外径にテーパ凹状を形成せしめた
が、これを外側円筒１ａの内径に形成させても、
又外側円筒の内径と内側円筒１ｂの外径の両方に
形成させてもよい。 Further, in the embodiment, a tapered concave shape was formed on the outer diameter of the inner cylinder 1b from the viewpoint of ease of processing, but even if this tapered concave shape was formed on the inner diameter of the outer cylinder 1a,
Alternatively, it may be formed on both the inner diameter of the outer cylinder and the outer diameter of the inner cylinder 1b.
以上説明したように本発明によれば、内部に加
熱素子を有する回転加熱ローラと、該加熱ローラ
に圧着しながら回転可能に付設した加圧ローラと
を備える加熱ローラ定着装置において、記録紙と
当接する加熱ローラの外側円筒内に内側円筒を圧
入せしめ、且つ外側内筒と内側円筒との間で軸方
向中央部に空隙を形成したことを特徴とする加熱
ローラ定着装置としたため、中央肉厚部に空隙を
有する加熱ローラ得、よつて表面温度分布略一定
にすることにより、シワ防止の信頼性を向上させ
ることが出来る。
As explained above, according to the present invention, in a heating roller fixing device including a rotating heating roller having a heating element inside and a pressure roller rotatably attached to the heating roller, The heating roller fixing device is characterized in that the inner cylinder is press-fitted into the outer cylinder of the heating roller that is in contact with the heating roller, and a gap is formed at the center in the axial direction between the outer inner cylinder and the inner cylinder. The reliability of wrinkle prevention can be improved by obtaining a heating roller having voids, thereby making the surface temperature distribution substantially constant.
また加熱ローラ内のハロゲンランプの両端部の
発熱量を極端に大きくしなくとも、換言すればハ
ロゲンランプの寿命を短かくすることなくシワ防
止の信頼性を向上させることが出来るという効果
がある。 Furthermore, there is an effect that the reliability of preventing wrinkles can be improved without significantly increasing the amount of heat generated at both ends of the halogen lamp within the heating roller, in other words, without shortening the life of the halogen lamp.
第１図は、本発明の一実施例を示す長手方向の
断面図、第２図は、従来の加熱ローラ定着装置の
概略側面図、第３図は、従来の加熱ローラ表面の
温度分布を示す図、そして、第４図は、従来のヒ
ータの発熱分布を示す図である。
１′……加熱ローラ、１ａ……外側円筒、１ｂ
……内側円筒、１ｃ……空隙、２……熱源、３…
…記録紙、５……加圧ローラ。
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a schematic side view of a conventional heating roller fixing device, and FIG. 3 is a diagram showing the temperature distribution on the surface of a conventional heating roller. FIG. 4 is a diagram showing the heat generation distribution of a conventional heater. 1'...Heating roller, 1a...Outer cylinder, 1b
...Inner cylinder, 1c...Gap, 2...Heat source, 3...
... Recording paper, 5... Pressure roller.
Claims (1)
該加熱ローラに圧着しながら回転可能に付設した
加圧ローラとを備える加熱ローラ定着装置におい
て、記録紙と当接する加熱ローラの外側円筒内に
内側円筒を圧入せしめ、且つ外側円筒と内側円筒
との間で軸方向中央部に空隙を形成したことを特
徴とする加熱ローラ定着装置。1 a rotating heating roller having a heating element inside;
In a heating roller fixing device comprising a pressure roller rotatably attached to the heating roller while being pressed against the heating roller, an inner cylinder is press-fitted into an outer cylinder of the heating roller that contacts the recording paper, and the outer cylinder and the inner cylinder are connected by pressure. A heating roller fixing device characterized in that a gap is formed in the center in the axial direction between the heating rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60167213A JPS6227781A (en) | 1985-07-29 | 1985-07-29 | Heat roller fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60167213A JPS6227781A (en) | 1985-07-29 | 1985-07-29 | Heat roller fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6227781A JPS6227781A (en) | 1987-02-05 |
| JPH0519711B2 true JPH0519711B2 (en) | 1993-03-17 |
Family
ID=15845520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60167213A Granted JPS6227781A (en) | 1985-07-29 | 1985-07-29 | Heat roller fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6227781A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4640775B2 (en) | 2004-11-25 | 2011-03-02 | キヤノンファインテック株式会社 | Heat fixing device and image forming apparatus |
| JP6684476B2 (en) * | 2018-03-30 | 2020-04-22 | ブラザー工業株式会社 | Fixing device |
-
1985
- 1985-07-29 JP JP60167213A patent/JPS6227781A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6227781A (en) | 1987-02-05 |
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