JPH0333725Y2 - - Google Patents
Info
- Publication number
- JPH0333725Y2 JPH0333725Y2 JP11675885U JP11675885U JPH0333725Y2 JP H0333725 Y2 JPH0333725 Y2 JP H0333725Y2 JP 11675885 U JP11675885 U JP 11675885U JP 11675885 U JP11675885 U JP 11675885U JP H0333725 Y2 JPH0333725 Y2 JP H0333725Y2
- Authority
- JP
- Japan
- Prior art keywords
- roller
- pressure
- heating roller
- pressure roller
- fixing device
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 35
- 230000002093 peripheral effect Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 235000019589 hardness Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Fixing For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、熱定着装置の改良に関する。[Detailed explanation of the idea] [Industrial application field] The present invention relates to an improvement in a heat fixing device.
大部分の電子写真複写機においては、現像後の
複写紙を加熱ローラと加圧ローラとから成る熱定
着装置によつて熱定着するようにしているが、定
着時、複写紙は加圧ローラによつて加熱ローラ側
に加圧されるため、定着完了後の複写紙には加熱
ローラの外周に沿うカールが生ずることがあつ
た。
In most electrophotographic copying machines, the developed copy paper is thermally fixed by a heat fixing device consisting of a heating roller and a pressure roller. As a result, pressure is applied to the heating roller side, so that the copy paper after fixing is sometimes curled along the outer periphery of the heating roller.
上記カールを除去する従来の手段として、例え
ば、熱定着装置の搬送方向下流側に該熱定着装置
とは別に、一対のカール取り用ローラ対を設け、
定着時加熱ローラ側にカールした複写紙を通過さ
せることにより、該複写紙のカールを矯正するよ
うにしたものがある（実開昭58−159557号公報）。 As a conventional means for removing the curl, for example, a pair of curl removing rollers is provided separately from the heat fixing device on the downstream side of the heat fixing device in the conveying direction.
There is a method in which the curl of the copy paper is corrected by passing the curled copy paper toward the heating roller during fixing (Japanese Utility Model Publication No. 159557/1983).
しかしながら、上述のように構成した場合、熱
定着装置の他にもう一対のローラ対を要し、それ
だけ構成が複雑になり、複写紙の巻き込み確率が
高くなる。又、前記ローラ対を駆動するため余分
の電力が必要となる。
However, when configured as described above, another pair of rollers is required in addition to the heat fixing device, which increases the complexity of the configuration and increases the probability of copy paper getting caught. Further, extra power is required to drive the pair of rollers.
本考案は、上述の事柄に留意してなされたもの
で、上記不都合を悉く解消した熱定着装置を提供
することを目的とする。 The present invention has been made with the above-mentioned considerations in mind, and it is an object of the present invention to provide a heat fixing device that eliminates all of the above-mentioned disadvantages.
上記目的を達成するため、本考案に係る熱定着
装置は、加熱ローラと、該加熱ローラに圧接し、
かつ、その周面が前記加熱ローラよりも柔らかな
加圧ローラと、前記両ローラの複写紙排出側にお
いて前記加圧ローラに圧接し、かつ、その周面が
前記加圧ローラよりも柔らかなカール取りローラ
とから構成した点に特徴がある。
In order to achieve the above object, a heat fixing device according to the present invention includes a heating roller, a heating roller that is in pressure contact with the heating roller,
and a pressure roller whose peripheral surface is softer than the heating roller, and a pressure roller which is in pressure contact with the pressure roller on the copy paper ejection side of both rollers, and whose peripheral surface is curled softer than the pressure roller. The feature is that it is composed of a pick-up roller.
上記構成によれば、加圧ローラとカール取りロ
ーラとの間を通過する際、加熱ローラと加圧ロー
ラとの間を通過するとき形成されたカールと正反
対のカールが形成され、結果的には複写紙におけ
るカールが完全に矯正される。
According to the above configuration, when passing between the pressure roller and the curl removal roller, a curl is formed that is exactly opposite to the curl formed when passing between the heating roller and the pressure roller, and as a result, Curls in copy paper are completely corrected.
以下、本考案の実施例を図面に基づいて説明す
る。
Hereinafter, embodiments of the present invention will be described based on the drawings.
第１図は、本考案に係る熱定着装置を適用した
電子写真複写機の排紙部近傍を示し、１は電子写
真複写機の本体ケース、２は本体ケース１に形成
された排紙口である。３は排紙口２の搬送方向上
流側に設けられた熱定着装置である。４は熱定着
装置３と排紙口２との間に設けられる排紙ローラ
対で、熱定着装置３を経た複写紙Ｐはこの排紙ロ
ーラ対４を経て排紙口２の外部に設けられた排紙
トレイ（図外）上に排出される。 FIG. 1 shows the vicinity of the paper ejecting section of an electrophotographic copying machine to which the heat fixing device according to the present invention is applied, in which 1 is the main body case of the electrophotographic copying machine, and 2 is the paper ejection port formed in the main body case 1. be. 3 is a heat fixing device provided upstream of the paper discharge port 2 in the conveyance direction. Reference numeral 4 denotes a pair of paper discharge rollers provided between the heat fixing device 3 and the paper discharge port 2, and the copy paper P that has passed through the heat fixing device 3 passes through the paper discharge roller pair 4 and is provided outside the paper discharge port 2. The paper is ejected onto the paper output tray (not shown).
前記熱定着装置３は周面の硬さが相異なる加熱
ローラ５、加圧ローラ６、カール取りローラ７の
３ローラから構成されている。 The heat fixing device 3 is composed of three rollers, a heating roller 5, a pressure roller 6, and a curl removal roller 7, which have different hardnesses on their circumferential surfaces.
即ち、前記加熱ローラ５は内部にヒータ５ａを
備えており、その周面は３ローラのうちで最も硬
く形成されている。例えば、アルミニウム等の芯
ロールの表面にテフロンコーテイングを施した
り、或いはセラミツクより成る。 That is, the heating roller 5 is equipped with a heater 5a inside, and its peripheral surface is formed to be the hardest among the three rollers. For example, the core roll may be made of aluminum or the like with a Teflon coating on its surface, or made of ceramic.
前記加圧ローラ６は前記加熱ローラ５に圧接し
て設けられており、その周面が前記加熱ローラ５
よりも柔らかく、例えば、芯ロール６ａの表面に
シリコンゴム６ｂが被覆して形成されている。 The pressure roller 6 is provided in pressure contact with the heating roller 5, and its peripheral surface is in contact with the heating roller 5.
For example, the surface of the core roll 6a is coated with silicone rubber 6b.
前記カール取りローラ７は前記両ローラ５，６
の複写紙排出側において、前記加圧ローラ６に圧
接して設けられており、その周面が前記加熱ロー
ラ６よりも柔らかく、例えば、芯ロール７ａの表
面にウレタンゴム７ｂが被覆して形成されてい
る。尚、このカール取りローラ７の軸芯位置を変
え、前記加圧ローラ６との軸間距離を変え得るよ
うにしておけば、加圧ローラ６に対するカール取
りローラ７の接触面積及び加圧時間を調節するこ
とが出来る。又、上記３ローラ５，６，７の直径
を変えることによつても、前記接触面積及び加圧
時間を調節することが出来る。尚、図示する例に
あつては、上記３ローラ５，６，７の直径を夫々
R5，R6，R7とすると、R5＞R6＞R7となるよう設
定されている。 The curl removing roller 7 is connected to both the rollers 5 and 6.
It is provided in pressure contact with the pressure roller 6 on the copy paper ejection side of the core roll 7a, and its peripheral surface is softer than the heating roller 6. For example, the core roll 7a is formed by coating the surface of the core roll 7a with urethane rubber 7b. ing. Note that if the axial center position of this curl removal roller 7 is changed and the distance between the shafts and the pressure roller 6 can be changed, the contact area of the curl removal roller 7 with respect to the pressure roller 6 and the pressing time can be changed. It can be adjusted. Also, by changing the diameters of the three rollers 5, 6, and 7, the contact area and the pressing time can be adjusted. In the illustrated example, the diameters of the three rollers 5, 6, and 7 are respectively
R 5 , R 6 , and R 7 are set so that R 5 > R 6 > R 7 .
次に、上記熱定着装置の作動について説明す
る。複写動作時、加熱ローラ５は時計方向CWに
回転し、この加熱ローラ５に接している加圧ロー
ラ６は反時計方向UWに回転し、更に、加圧ロー
ラ６に接しているカール取りローラ７は前記加熱
ローラ５と同じく時計方向CWに回転する。 Next, the operation of the heat fixing device will be explained. During the copying operation, the heating roller 5 rotates clockwise CW, the pressure roller 6 in contact with the heating roller 5 rotates counterclockwise UW, and the curl removing roller 7 in contact with the pressure roller 6 rotates counterclockwise UW. rotates clockwise CW like the heating roller 5.
この状態において、感光体方向（図の右方）か
ら搬送されてくる複写紙Ｐは先ず加熱ローラ５と
加圧ローラ６によつて挟持され、両ローラ５，６
の回転により搬送方向下流側に送られ、所定の定
着が行われる。ここで、加圧ローラ６の周面は加
熱ローラ５のそれよりも柔らかいので、加圧ロー
ラ６の周面が凹み、従つて、前記定着時複写紙Ｐ
には加熱ローラ５の周面に沿うカールが生ずる。 In this state, the copy paper P conveyed from the photoreceptor direction (right side in the figure) is first held between the heating roller 5 and the pressure roller 6, and then both rollers 5, 6
The rotation causes the paper to be sent to the downstream side in the transport direction, and predetermined fixing is performed. Here, since the circumferential surface of the pressure roller 6 is softer than that of the heating roller 5, the circumferential surface of the pressure roller 6 is depressed, and therefore, the copy paper P is
A curl occurs along the circumferential surface of the heating roller 5.
次いで、複写紙Ｐは加圧ローラ６とカール取り
ローラ７によつて挟持され、両ローラ６，７の回
転により搬送方向下流側に送られるが、カール取
りローラ７の周面は加圧ローラ６のそれよりも柔
らかいので、カール取りローラ７の周面が凹み、
複写紙Ｐが両ローラ６，７に挟持されている状態
では、加圧ローラ６の周面に沿つてカールされ
る。つまり、複写紙Ｐは加圧ローラ６とカール取
りローラ７によつて挟持されているときには、加
熱ローラ５と加圧ローラ６によつて挟持されてい
るときとは正反対にカールされるので、結果的に
は複写紙Ｐにおけるカールが完全に除去される。
従つて、加圧ローラ６とカール取りローラ７との
間を経た複写紙Ｐはカールのない状態で排紙口２
を経て、排紙トレイ（図外）上に送りだされる。 Next, the copy paper P is held between the pressure roller 6 and the curl removal roller 7, and is sent downstream in the conveying direction by the rotation of both rollers 6 and 7. Since it is softer than that of , the circumferential surface of the curl removal roller 7 is dented,
When the copy paper P is held between the rollers 6 and 7, it is curled along the circumferential surface of the pressure roller 6. In other words, when the copy paper P is held between the pressure roller 6 and the curl removal roller 7, it is curled in the opposite direction to when it is held between the heating roller 5 and the pressure roller 6, so that the result is Specifically, curls on the copy paper P are completely removed.
Therefore, the copy paper P that has passed between the pressure roller 6 and the curl removal roller 7 is delivered to the paper ejection port 2 without any curls.
After that, the paper is sent out onto a paper output tray (not shown).
そして、加熱ローラ５とカール取りローラ７の
相対向する周面においては、その回転方向が互い
に逆方向となるので、加熱ローラ５による複写紙
Ｐの巻き込みが防止される。 Further, since the rotating directions of the opposing circumferential surfaces of the heating roller 5 and the curl removal roller 7 are opposite to each other, the copy paper P is prevented from being caught by the heating roller 5.
又、カール取りローラ７の軸芯を移動し、該ロ
ーラ７と加圧ローラ６との軸間距離を適宜調節す
ることにより両ローラ６，７の接触面積及び加圧
時間を所望値にすることが出来、より確実にカー
ル矯正することが出来る。 Further, by moving the axis of the curl removal roller 7 and adjusting the distance between the axes of the roller 7 and the pressure roller 6 as appropriate, the contact area and pressure time of both rollers 6 and 7 can be set to desired values. This allows for more reliable curl correction.
第２図は本考案の他の実施例を示し、加熱ロー
ラ５とカール取りローラ７との間を若干大きく
し、この間に複写紙分離爪８を配置したもので、
このようにすることにより、加熱ローラ５と加圧
ローラ６の間を経た複写紙Ｐを加熱ローラ５に巻
き込むことなく、より確実に加圧ローラ６とカー
ル取りローラ７の方向に搬送し得る。 FIG. 2 shows another embodiment of the present invention, in which the space between the heating roller 5 and the curl removing roller 7 is slightly enlarged, and a copy paper separating claw 8 is arranged between the two.
By doing so, the copy paper P that has passed between the heating roller 5 and the pressure roller 6 can be more reliably conveyed in the direction of the pressure roller 6 and the curl removing roller 7 without being caught up in the heating roller 5.
以上詳述したように、本考案においては、加熱
ローラと、該加熱ローラに圧接し、かつ、その周
面が前記加熱ローラよりも柔らかな加圧ローラ
と、前記両ローラの複写紙排出側において前記加
圧ローラに圧接し、かつ、その周面が前記加圧ロ
ーラよりも柔らかなカール取りローラとから熱定
着装置を形成しているので、従来技術のように、
熱定着装置の他にもう一対のローラ対を独立して
設ける必要がなく、それだけ構成が簡単になり、
余分な電力の消費を防止出来る。又、複写紙の巻
き込み確率を低減することが出来るので、動作の
安定な熱定着装置が得られる。
As detailed above, the present invention includes a heating roller, a pressure roller that is in pressure contact with the heating roller and whose peripheral surface is softer than that of the heating roller, and a pressure roller that is in pressure contact with the heating roller and has a softer peripheral surface than the heating roller, and Since the heat fixing device is formed of a curl removal roller that is in pressure contact with the pressure roller and whose circumferential surface is softer than that of the pressure roller, unlike the prior art,
There is no need to separately provide another pair of rollers in addition to the heat fixing device, which simplifies the configuration.
Excess power consumption can be prevented. Furthermore, since the probability of copy paper getting caught up can be reduced, a thermal fixing device with stable operation can be obtained.
尚、本考案の熱定着装置は電子写真複写機の
他、フアクシミリなど画像形成装置に適用できる
ことは云うまでもない。 It goes without saying that the heat fixing device of the present invention can be applied to image forming apparatuses such as facsimile machines as well as electrophotographic copying machines.
第１図は本考案の一実施例の断面図、第２図は
他の実施例の断面図である。
５……加熱ローラ、６……加圧ローラ、７……
カール取りローラ７。
FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a sectional view of another embodiment. 5... Heating roller, 6... Pressure roller, 7...
Curling roller 7.
Claims (1)
その周面が前記加熱ローラよりも柔らかな加圧ロ
ーラと、前記両ローラの複写紙排出側において前
記加圧ローラに圧接し、かつ、その周面が前記加
圧ローラよりも柔らかなカール取りローラとから
成ることを特徴とする熱定着装置。 a heating roller, in pressure contact with the heating roller, and
a pressure roller whose circumferential surface is softer than the heating roller; and a curl removing roller which is in pressure contact with the pressure roller on the copy paper ejection side of both rollers and whose circumferential surface is softer than the pressure roller. A heat fixing device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11675885U JPH0333725Y2 (en) | 1985-07-29 | 1985-07-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11675885U JPH0333725Y2 (en) | 1985-07-29 | 1985-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6223260U JPS6223260U (en) | 1987-02-12 |
| JPH0333725Y2 true JPH0333725Y2 (en) | 1991-07-17 |
Family
ID=31001646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11675885U Expired JPH0333725Y2 (en) | 1985-07-29 | 1985-07-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0333725Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2631315B2 (en) * | 1989-01-08 | 1997-07-16 | 千晴 吉原 | Sheet flattening method and flattening apparatus |
| JP5659651B2 (en) * | 2010-09-17 | 2015-01-28 | セイコーエプソン株式会社 | Recording device |
-
1985
- 1985-07-29 JP JP11675885U patent/JPH0333725Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6223260U (en) | 1987-02-12 |
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