JPS63276077A - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPS63276077A JPS63276077A JP62111057A JP11105787A JPS63276077A JP S63276077 A JPS63276077 A JP S63276077A JP 62111057 A JP62111057 A JP 62111057A JP 11105787 A JP11105787 A JP 11105787A JP S63276077 A JPS63276077 A JP S63276077A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- roll
- transfer paper
- transfer
- cylindrical members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 230000037303 wrinkles Effects 0.000 abstract description 15
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 210000000078 claw Anatomy 0.000 description 17
- 238000002474 experimental method Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Advancing Webs (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、乾式の電子複写装置に関わり、特に転写紙に
トナーを固着するための定着装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dry type electronic copying device, and more particularly to a fixing device for fixing toner to transfer paper.
従来の技術
静電潜像保持体例えば感光体上に熱溶融性樹脂を主成分
とする粉末トナーによってトナー像を作成する作像手段
と、静電潜像保持体に転写紙（Ｖ通紙）を転接し転写紙
にトナー像を得るようにした転写手段と、加熱されたロ
ール部材により転写トナー像を転写紙上に固着する定着
手段を主要な構成手段として、粉末トナーにより静電潜
像保持体上に形成された静電潜像を転写紙上に顕像化す
るようにした電子写真複写装置において、上記静電潜像
保持体に転写紙を転接し、転写トナー像を得た後これを
加熱定着手段により定着した時、片面にトナー像を得て
既に定着手段を通過し更に複数回の複写に供されようと
する転写紙は、紙しわの発生する比率が高い。特に、転
写紙の坪量が少なく、かつ同一面上に複数回の複写を行
う場合には、より発生する比率が上昇する。それは、坪
量の少ない転写紙は剛度が低い上に加熱定着手段により
加熱された時、その転写紙中の含有水分が蒸発し、含有
水分の低下を招き物理的歪が残存するためである。2. Description of the Related Art An electrostatic latent image holder, for example, an image forming means for creating a toner image on a photoconductor using a powder toner mainly composed of a thermofusible resin, and a transfer paper (V paper passing) on the electrostatic latent image holder. The electrostatic latent image holder is made of powdered toner, with the main constituent means being a transfer means that transfers the toner image onto the transfer paper by rolling contact, and a fixing means that fixes the transferred toner image onto the transfer paper using a heated roll member. In an electrophotographic copying apparatus that is configured to visualize an electrostatic latent image formed on a transfer paper, the transfer paper is brought into contact with the electrostatic latent image holder, and after a transferred toner image is obtained, this is heated. Transfer paper that has a toner image on one side when fixed by the fixing means, has already passed through the fixing means, and is about to be copied multiple times has a high rate of paper wrinkles. In particular, when the basis weight of the transfer paper is small and multiple copies are made on the same surface, the occurrence rate increases. This is because transfer paper with a low basis weight has low rigidity, and when the transfer paper is heated by a heat fixing means, the moisture contained in the transfer paper evaporates, resulting in a decrease in moisture content and residual physical distortion.
一般に、転写紙に用いられる用紙には、ＪＩＳ Ｐ８１
１１の水分測定条件において、４％〜８％程度の水分が
含有されて転写紙の所望の特性を保持している。しかし
ながら、上記したように通常１６０℃〜１９０℃程度に
加熱され、また加熱ロール部材とそのバックアップロー
ル部材のニップ部に１ｋｇ／ｃｍ以上の線圧が印加され
て転写紙を加圧している定着手段を通過すると、転写紙
は、その温度のために水分が蒸発し、おおよそ２％〜４
％程度含有水分が低下すると共に加熱定着手段を通過さ
せた方向に沿って物理的な歪みが残存し転写紙を構成し
ている木質繊維の収縮等により、転写紙にカールが生じ
変形するのが一般的な傾向であり、更にこのカール形状
は紙種や転写紙が置かれている周囲環境の条件によって
様々に変化するのが常である。Generally, the paper used for transfer paper is JIS P81.
Under the moisture measurement conditions of No. 11, about 4% to 8% of moisture was contained and the desired characteristics of the transfer paper were maintained. However, as mentioned above, the fixing means is usually heated to about 160°C to 190°C, and a linear pressure of 1 kg/cm or more is applied to the nip between the heating roll member and its backup roll member to press the transfer paper. When the transfer paper passes through the
As the water content decreases by approximately 1.5%, physical distortion remains along the direction of passing through the heat fixing means, and the wood fibers that make up the transfer paper shrink, causing the transfer paper to curl and become deformed. This is a general tendency, and the curl shape usually varies depending on the type of paper and the environmental conditions in which the transfer paper is placed.
最近、電子複写装置が広範に普及してくると、航空便用
の複写物の重量低減のために、或いは複写物のファイリ
ング重量削減のために、或いは経済的理由によって薄手
の坪量の少ない用紙を多用し、且つ用紙の表裏に複写さ
れるようになってきたり、また複写物のカラー化のため
に、片面に２度あるいは３度にわたって複写する等のこ
とが行われており、これらの結果、定着手段通過後の転
写紙には紙しわが発生する機会が増大する傾向にある。Recently, as electronic copying devices have become widespread, thin paper with a low basis weight is being used to reduce the weight of copies for airmail, to reduce the weight of filing copies, or for economic reasons. As a result of these changes, people are using a lot of paper, copying on both sides of paper, and copying on one side twice or three times to make the copies color. After passing through the fixing means, the transfer paper tends to have an increased chance of being wrinkled.
本発明者等は、これら祇しわの発生率を低減すべく定着
手段に対して転写紙が突入し排紙されるまでの挙動を詳
細に観察した結果、同−転写紙に対して２回目以降の複
写を行う場合、転写紙の排紙方向から見て、両サイドが
垂れ下がった、いわゆる中高の状態で定着手段に突入さ
せると排紙された転写紙には紙しわが発生し難いという
傾向を把握した。In order to reduce the occurrence rate of these wrinkles, the present inventors have carefully observed the behavior of transfer paper from the time it enters the fixing means until it is ejected, and found that When making copies, if the transfer paper enters the fixing device in a so-called mid-height state with both sides hanging down when viewed from the ejecting direction, the ejected transfer paper tends to be less likely to wrinkle. I figured it out.
発明が解決しようとする問題点
上記したように従来の加熱ロール定着手段においては転
写紙の紙種や転写紙が置かれている周囲環境の条件によ
ってカールの状態が種々変化し、複数回の複写を行う場
合は、定着装置通過後の転写紙に祇しわの発生する割合
が高いものであった。Problems to be Solved by the Invention As mentioned above, in the conventional heated roll fixing means, the state of curl varies depending on the paper type of the transfer paper and the conditions of the surrounding environment in which the transfer paper is placed. When carrying out this method, there was a high rate of occurrence of wrinkles on the transfer paper after passing through the fixing device.
本発明は、かかる点に鑑みて成されたもので、簡易な構
成で転写紙の紙しわの発生を低減回避することを目的と
するものである。The present invention has been made in view of this point, and an object of the present invention is to reduce and avoid the occurrence of paper wrinkles in transfer paper with a simple configuration.
問題点を解決するための手段
上記問題点を解決するために本発明の定着装置は、静電
潜像保持体上にトナー像を作成する作像手段と、静電潜
像保持体に転写紙を転接し、この転写紙にトナー像を得
るようにした転写手段とを少なくとも具備した電子写真
複写装置に適用される定着装置であって、前記定着装置
はヒートロールとそのバックアップロールにより転写ト
ナー像を転写紙に加圧定着する定着手段と、この定着手
段の排紙側に棒状回転部材に間隔を変更し得るように配
設された複数個の円筒部材を連ねた駆動ロールと棒状回
転部材に複数個の円筒部材を略等間隔に配設固定した従
動ロールを一対に組み合わせた排紙ロールとを備えた構
成を有するものである。Means for Solving the Problems In order to solve the above problems, the fixing device of the present invention includes an image forming means for creating a toner image on an electrostatic latent image holding member, and a transfer paper for forming a toner image on the electrostatic latent image holding member. This fixing device is applied to an electrophotographic copying apparatus, and the fixing device includes at least a transfer means configured to transfer a toner image onto the transfer paper by transferring a toner image onto the transfer paper, the fixing device using a heat roll and its backup roll to transfer a toner image onto the transfer paper. A fixing means that pressurizes and fixes the image onto the transfer paper, and a drive roll and a rod-like rotating member that are connected to a plurality of cylindrical members arranged in a manner that the spacing can be changed. It has a configuration including a paper discharge roll which is a combination of a pair of driven rolls each having a plurality of cylindrical members arranged and fixed at approximately equal intervals.
作用
本発明は、上記した構成により加熱ロール定着手段より
排紙された転写紙に対して、その転写紙が自然冷却され
る以前に排紙される方向に平行に略中央部に曲げ加工を
付与することによって規制されたカール形状を与えるこ
とが出来るために、転写紙の見かけの剛度を上昇させ、
２回目以降の複写の際に転写紙の転写手段から定着手段
への搬送状態を安定化すると共に定着手段へ中高の状態
で突入させ得ることを可能にしたものであるから、両面
複写時、さらには片面複数回の複写時においても、紙し
わ発生率を低減させて定着を可能とするものである。Effect of the present invention With the above-described configuration, the transfer paper discharged from the heating roll fixing means is bent approximately at the center thereof in parallel to the direction in which the paper is discharged before the transfer paper is naturally cooled. In order to be able to give a controlled curl shape by increasing the apparent stiffness of the transfer paper,
This stabilizes the transport state of the transfer paper from the transfer means to the fixing means during the second and subsequent copying, and also allows it to enter the fixing means in a medium-height position, so that it can be used even more easily during double-sided copying. This enables fixing by reducing the incidence of paper wrinkles even when copying multiple times on one side.
実施例
以下、本発明の一実施例について図面を参照しながら詳
述する。第５図は、本発明の定着装置が適用される電子
写真複写装置の一例を示す内部構造図である。図におい
て、１は複写装置本体であって、その略中央部に像担持
体、具体的には感光体ドラム２が矢符方向へ回転駆動さ
れるように設けられている。ドラム２の周囲には、帯電
用チャージャ３、現像器４、転写用チャージャ５、分離
除電用チャージャ６、クリーニング装置７が感光体ドラ
ム２の矢符で示されている回転方向に順次配設され、ド
ラム２の回転に伴って動作し、ドラム２の回転と同期し
て搬送される転写紙上に、トナー像を転写させる作像部
の主要な作像手段と転写手段を構成している。EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 5 is an internal structural diagram showing an example of an electrophotographic copying apparatus to which the fixing device of the present invention is applied. In the figure, reference numeral 1 denotes a main body of a copying apparatus, and an image carrier, specifically a photosensitive drum 2, is provided approximately at the center thereof so as to be driven to rotate in the direction of the arrow. Around the drum 2, a charging charger 3, a developing device 4, a transfer charger 5, a separation charger 6, and a cleaning device 7 are sequentially arranged in the rotational direction of the photosensitive drum 2 as shown by the arrow. , operates as the drum 2 rotates, and constitutes the main image forming means and transfer means of the image forming section that transfers the toner image onto the transfer paper conveyed in synchronization with the rotation of the drum 2.
この作像部は、感光体ドラム２をクリーニング装置７に
よりクリーニングしたのち、帯電用チャージセ３により
帯電させる。ドラム２のこの帯電表面には、走査光学系
９を通して本体１面上の原稿載置ガラス８上に置かれた
原稿の像によ６露光され、静電潜像を形成し、この静電
潜像を現像器４によってトナー現像する作像手段と、現
像後のトナー像を、同期を取って送られてくる転写紙上
へ転写用チャージャ５によって転写する転写手段により
主要部分が構成されている。さらに、転写後の転写紙は
分離除電用チャージャ６によってドラム２０表面から分
離される。転写紙が分離された転写後のドラム２の表面
は、クリーニング装置７により残留トナーをかき落とさ
れた後、最初の状態に戻る。In this image forming section, after the photosensitive drum 2 is cleaned by a cleaning device 7, it is charged by a charging charger 3. This charged surface of the drum 2 is exposed through the scanning optical system 9 to an image of the document placed on the document placement glass 8 on the main body 1, forming an electrostatic latent image. The main parts are composed of an image forming means for developing an image with toner using a developing device 4, and a transfer means for transferring the developed toner image onto a transfer paper fed in synchronization using a transfer charger 5. Furthermore, the transfer paper after the transfer is separated from the surface of the drum 20 by a charger 6 for separating and eliminating electricity. The surface of the drum 2 after the transfer from which the transfer paper has been separated returns to its initial state after the residual toner is scraped off by the cleaning device 7.
１０は原稿カバーであって、原稿′！１置装ラス８に対
し開閉出来るように本体１へ取り付けられている。１１
は走査光学系の結像レンズである。10 is a manuscript cover, which is a manuscript'! 1 is attached to the main body 1 so that it can be opened and closed with respect to the device lath 8. 11
is the imaging lens of the scanning optical system.
作像部の左側には、前記転写手段へ転写紙を送り込む給
紙手段、また右側には前記転写後にドラム２から分離さ
れた転写紙を運ぶ搬送路１２、および転写紙上の転写ト
ナー像を加熱融着させる加熱定着装置１３、定着装置１
３を通過した転写紙を排出させる排紙部が配設されて電
子複写装置を構成している。給紙部は、給紙カセッ目４
、給紙カセット１５が複写装置本体１の一方の側面へ張
り出す状態で装着され、給紙ローラ１６．１？およびガ
イド板１８を選択的に駆動することによって給紙カセッ
ト１４、１５の一方から転写紙をタイミングローラ１９
へ送りだし、前記感光体ドラム２の下部の転写手段へ、
感光体ドラム２上のトナー像の移動と同期を取って送り
込む。On the left side of the image forming section, there is a paper feeding means that feeds the transfer paper to the transfer means, and on the right side there is a conveyance path 12 that carries the transfer paper separated from the drum 2 after the transfer, and a conveyor path 12 that heats the transferred toner image on the transfer paper. Heat fixing device 13 for fusing, fixing device 1
A paper discharge section for discharging the transfer paper that has passed through the transfer paper 3 is provided to constitute an electronic copying apparatus. The paper feed section is paper feed cassette 4.
, the paper feed cassette 15 is attached to the copying apparatus main body 1 in a state that it protrudes from one side, and the paper feed roller 16.1? By selectively driving the guide plate 18, the transfer paper is transferred from one of the paper feed cassettes 14 and 15 to the timing roller 19.
to the transfer means below the photoreceptor drum 2,
The toner image is fed in synchronization with the movement of the toner image on the photosensitive drum 2.
上記した複写装置には、片面複写後の転写紙に対して、
複写された面に再度複写する或いは複写された面の裏面
に複写するために、前記転写紙を再度作像手段に搬送す
るための補助給紙手段が設けられている。この補助給紙
手段には片面複写後の転写紙に対して、複写された面に
複数回複写を可能とする片面複写補助給紙手段、及び片
面複写後の転写紙を作像手段へ表裏反転状態で送り返し
、裏面に複写するための両面複写補助給紙手段が付設さ
れている。The above-mentioned copying device has a
An auxiliary sheet feeding means is provided for conveying the transfer paper to the image forming means again in order to copy the image again on the surface that has been copied or to copy it on the back side of the surface that has been copied. This auxiliary paper feeding means includes a single-sided copying auxiliary paper feeding means that enables multiple copies to be made on the copied side of the transfer paper after single-sided copying, and a one-sided copying auxiliary paper feeding means that allows the transfer paper after single-sided copying to be reversed to the image forming means. A double-sided copying auxiliary paper feeding means is attached for sending the paper back in the same state and copying it on the back side.
これらの二つの補助手段の選択は、ガイド爪２０及び、
ガイド爪２１の二つのガイド爪の動作によって選択され
る。第５図のガイド爪２０の図示状態においては、これ
ら二つの補助手段を動作させる状態にあり、更に、ガイ
ド爪２１は、両面複写補助給紙手段が作動する状態にあ
る。片面複写補助給紙手段は、ガイド爪２１が時計方向
に回転することによって形成され、定着装置１３を通過
した転写紙は、ガイド爪２０、及び、ガイド爪２１によ
って案内され、次の複写のために、一時停止調整ローラ
２２で感光体ドラム２上のトナー像との同期合わせの待
ち状態におかれる。そして、作像部の動作に合わせてタ
イミングローラ１９に送られる。両面複写補助給紙手段
は第５図に図示したガイド爪２０及び、ガイド爪２１の
状態において動作状態にあり、定着装置１３を通過した
転写紙は、ガイド爪２０、及び、ガイド爪２１によって
案内されて、送りロール２３によって、一旦スイッチバ
ック部２４に送られた後直ちに送りロール２３の動作に
よって搬送ベルト２５上に送り返され、次の裏面複写の
ために、一時停止調整ローラ２２で感光体ドラム２上の
トナー像との同期合わせの待状態におかれる。ここで、
片面複写を終えた転写紙は、搬送ベルト２５上に、転写
紙の先端が数口づつ後方にずれた状態で積層される。The selection of these two auxiliary means is based on the guide claw 20 and
The selection is made by the operation of the two guide claws of the guide claw 21. In the illustrated state of the guide claw 20 in FIG. 5, these two auxiliary means are in operation, and the guide claw 21 is in a state in which the double-sided copying auxiliary paper feeding means is in operation. The single-sided copying auxiliary paper feeding means is formed by a guide claw 21 rotating clockwise, and the transfer paper that has passed through the fixing device 13 is guided by the guide claw 20 and the guide claw 21 for the next copy. Then, the temporary stop adjustment roller 22 waits for synchronization with the toner image on the photosensitive drum 2. Then, it is sent to the timing roller 19 in accordance with the operation of the image forming section. The double-sided copying auxiliary paper feeding means is in operation when the guide claws 20 and 21 are in the state shown in FIG. The image is transferred to the switchback section 24 by the feed roll 23, and then immediately sent back onto the conveyor belt 25 by the operation of the feed roll 23, and then the photoreceptor drum is moved by the temporary stop adjustment roller 22 for the next back side copying. It is placed in a waiting state for synchronization with the toner image on 2. here,
The transfer sheets that have undergone one-sided copying are stacked on the conveyor belt 25 with the leading edge of the transfer sheets being shifted backward by several pages.
本発明に従う定着装置が適用される電子複写装置の一例
は、上述した構成に成るものである。An example of an electronic copying apparatus to which the fixing device according to the present invention is applied has the configuration described above.
次に本発明にしたがう定着装置の一実施例を示す第１図
、及び排紙ロールの要部拡大図である第２図（ａ） （
ｂｌ （Ｃ）を参照しながら説明する。第１図において
定着手段の主要部分は、一般的な加熱ロール式定着装置
であるがヒートロール２６とバックアップロール２７の
２本のロールから成っている。ヒートロール２６は、円
筒状のアルミパイプ２８にテフロン被覆２９シたもので
あり、バックアップロール２７はアルミ芯金３０に耐熱
性シリコンゴム３１を被覆したものである、ここでは、
各ロールともその外径が４０■ｌでヒートロール２６は
肉ｒ￥３鶴のアルミパイプ２８表面に０．４−■厚のテ
フロン樹脂被覆２９を施したもの、バックアップロール
２７は直径２５鶴のアルミパイプに７．５鶴厚の耐熱シ
リコンゴムを被覆したものを用いている。そして、その
周速は前記感光体ドラム２の周速に略一致するように電
動機（図示せず）より駆動力を受け、そのニップ部にお
ける線厚はロール表面温度が常温状態において１ 、４
ｋｇ ／ ｃｒｍに調整している。ヒートロール２６
の内部には、通常加熱源として棒状のランプ３２が挿入
されており、ロール表面の温度が１５０〜１９０℃にな
るようにロール表面に当接している温度センサによって
温度を検知しランプに印加する電力を調整している。こ
こでは、９００Ｗのハロゲンランプを利用して１８０±
５℃に温度を設定している。定着手段の排紙側における
ヒートロール２６の表面には耐熱樹脂製の剥離爪３３が
当接している。一方、バックアップロール２７の表面に
も剥離爪３４が当接されているが、この剥離爪３４はト
ナーがオフセットを生じ、バンクアップロール２７に付
着したトナーによりバンクアンプロール２７に転写紙が
巻き付くことを防止するものである。通常においては転
写紙はその表面に転写されているトナーの作用によりヒ
ートロール表面に密着して排紙され、ヒートロール側剥
離爪によって剥離され、ガイド板３５によって定着手段
の排紙側に設けられた一対の排紙ロール３６．３７に送
られる。排紙ロール３６．３７は、ネオプレンゴム製の
４個に区分けされた長さ２４鶴の円筒部材３８と長さ５
１１の円筒状部材３９を棒状回転部材４０． ’ ４１
に連ねた駆動ロール３６と従動ロール３７の一対のロー
ルから構成されている。そして、駆動ロール３６には、
第２図（ａｌに示すように棒状回転部材４０に長手方向
に溝４２が付設されており回転部材４０に嵌合して突起
４３を保有する４個のスリ゛−ブ４４が回転部材４０上
をスライド出来るように構成されている。スリーブ４４
には前述の円筒部材３８が各々嵌めあわされている。各
スリーブ４４の一方の端部には、円周方向に係合溝４５
が付設されている。Next, FIG. 1 shows an embodiment of the fixing device according to the present invention, and FIG.
This will be explained with reference to bl (C). In FIG. 1, the main part of the fixing means is a general heating roll type fixing device, which consists of two rolls: a heat roll 26 and a backup roll 27. The heat roll 26 is a cylindrical aluminum pipe 28 coated with Teflon 29, and the backup roll 27 is an aluminum core 30 coated with heat-resistant silicone rubber 31. Here,
Each roll has an outer diameter of 40 μl, and the heat roll 26 is made of a 0.4-μ thick Teflon resin coating 29 on the surface of an aluminum pipe 28 with a diameter of 25 μl. An aluminum pipe coated with 7.5 mm thick heat-resistant silicone rubber is used. The circumferential speed thereof receives a driving force from an electric motor (not shown) so that it substantially matches the circumferential speed of the photoreceptor drum 2, and the line thickness at the nip portion is 1 to 4 when the roll surface temperature is at room temperature.
Adjusted to kg/crm. heat roll 26
A rod-shaped lamp 32 is usually inserted as a heating source inside the roll, and the temperature is detected by a temperature sensor in contact with the roll surface and applied to the lamp so that the temperature of the roll surface is 150 to 190°C. Adjusting power. Here, we used a 900W halogen lamp to
The temperature is set at 5°C. A peeling claw 33 made of heat-resistant resin is in contact with the surface of the heat roll 26 on the paper discharge side of the fixing means. On the other hand, a peeling claw 34 is also brought into contact with the surface of the backup roll 27, but this peeling claw 34 causes the toner to offset, and the transfer paper is wrapped around the bank-up roll 27 due to the toner adhering to the bank-up roll 27. This is to prevent this. Normally, the transfer paper is ejected in close contact with the heat roll surface due to the action of the toner transferred to the surface, and is peeled off by a peeling claw on the heat roll side, and is removed by a guide plate 35 provided on the paper ejection side of the fixing means. The paper is sent to a pair of paper discharge rolls 36 and 37. The paper discharge rolls 36 and 37 are composed of a cylindrical member 38 made of neoprene rubber and each having a length of 24 mm and a length of 5 mm.
11 cylindrical member 39 is connected to a rod-shaped rotating member 40. '41
It is composed of a pair of rolls, a driving roll 36 and a driven roll 37, which are connected to each other. And the drive roll 36 has
As shown in FIG. 2 (al), a rod-shaped rotating member 40 is provided with a groove 42 in the longitudinal direction, and four sleeves 44 that fit into the rotating member 40 and have protrusions 43 are placed on the rotating member 40. Sleeve 44
The above-mentioned cylindrical members 38 are fitted into each of the cylindrical members 38 . An engagement groove 45 is provided at one end of each sleeve 44 in the circumferential direction.
is attached.
係合溝４５にはそれぞれ先端が二股状に構成されその二
股部分が係合しているレバー４６が配設されている。こ
れらのレバー４６のうち、内側の二つの円筒部材３８に
係るレバー４６は、ネジ軸４７に、外側の二つの円筒部
材３８に係るレバー４６はネジ軸４８に、それぞれナン
ド４９．５０．５１．５２を介して立設している。また
、ネジ軸４７．４８はその中央部を境目に、ネジを切る
方向が逆、即ち一方が右ネジ、他方が左ネジになってお
り、従って、ネジ軸の回転によって円筒部材３８の外側
２個或いは内側の２個はそれぞれ互いに逆の方向へ移動
し４個の間隔を変えることが出来る。ネジ軸４７．４８
にはそれぞれ回転駆動源が連結されておりその回転回数
と回転方向を制御することによって、円筒部材３８の従
動ロール３７の円筒部材３９に対する位置を設定するこ
とが可能である。他方、従動ロール３７には、４個の円
筒部材３９が略等間隔で棒状回転部材４１に固定されて
取り付けられており、その自重で駆動ロール３６に当接
し回転している。棒状回転部材４１は、その略中央部に
おいて部材４１が貫通した長孔５３を有する連結板５４
によってソレノイド５５のプランジャに連結され、ネジ
軸４７．４８が回転しスリーブ４４が移動する時、ソレ
ノイド５５を作動させて従動ロール３７を持ち上げ、ス
リーブ４４の移動を助けている。Each of the engagement grooves 45 is provided with a lever 46 having a bifurcated tip and engaged with the bifurcated portion. Of these levers 46, the levers 46 associated with the two inner cylindrical members 38 are attached to the threaded shaft 47, and the levers 46 associated with the two outer cylindrical members 38 are attached to the threaded shaft 48, respectively. It is erected via 52. Further, the threaded shafts 47 and 48 are threaded in opposite directions, that is, one side is a right-handed thread and the other is a left-handed thread. The inner two pieces can move in opposite directions to change the spacing between the four pieces. Screw shaft 47.48
A rotation drive source is connected to each of the rollers, and by controlling the number of rotations and the direction of rotation, it is possible to set the position of the cylindrical member 38 with respect to the cylindrical member 39 of the driven roll 37. On the other hand, four cylindrical members 39 are fixedly attached to a rod-shaped rotating member 41 at approximately equal intervals to the driven roll 37, and are rotated by contacting the drive roll 36 by their own weight. The rod-shaped rotating member 41 has a connecting plate 54 having a long hole 53 through which the member 41 passes approximately in the center thereof.
When the screw shafts 47 and 48 rotate and the sleeve 44 moves, the solenoid 55 is actuated to lift the driven roll 37 and assist the movement of the sleeve 44.
なお、円筒部材３８の径は２２ｍ■、３９は２０報であ
り、それらの周速は感光体ドラム２の周速に略一致する
ように電動機（図示せず）から棒状回転部材４０が駆動
力を受けて回転する。The diameter of the cylindrical member 38 is 22 m, and the diameter of the cylindrical member 39 is 20 m. It rotates in response to the
本発明にしたがう定着装置の一実施例は以上のような構
成になるものである。この定着装置においては、転写手
段より送られてくる転写紙の次の複写面に応じて、前述
のネジ軸４７．４８を回転制御し排紙ロールにおけるス
リーブ４４０間隔を変えて円筒部材３８の位置を移動さ
せ排紙される転写紙に対して望ましいカールを付与する
ことが出来る。One embodiment of the fixing device according to the present invention has the above configuration. In this fixing device, the aforementioned screw shafts 47 and 48 are controlled to rotate in accordance with the next copying surface of the transfer paper sent from the transfer means, and the interval between the sleeves 440 on the paper discharge roll is changed to position the cylindrical member 38. It is possible to impart a desired curl to the transferred transfer paper by moving the transfer paper.
即ち、第３図の排紙方向から見た転写紙の断面図におい
て、次に裏面に複写する両面複写の場合は第３図（ａ）
に示すように転写紙の中央部が垂れ下がる状態で排紙で
きるようにスリーブ４４を外側へ移動させ円筒部材３８
の外側の２個のみ働くようにする。また、同一面に複写
する同一面複写の場谷は、第３図（ｂ）に示すように転
写紙の両サイドが垂れ下がった状態で排紙できるように
スリーブ４４を内側へ移動させ円筒部材３８の内側の２
個のみ働くようにする。That is, in the cross-sectional view of the transfer paper seen from the paper ejection direction in Figure 3, in the case of double-sided copying where the next copy is made on the back side, Figure 3 (a)
The sleeve 44 is moved outward and the cylindrical member 38 is moved so that the transfer paper can be discharged with the center part hanging down as shown in FIG.
Only the outer two will work. In addition, when copying on the same surface, the sleeve 44 is moved inward so that the cylindrical member 38 can be ejected with both sides of the transfer paper hanging down, as shown in FIG. 2 inside of
Make only one part work.
上記に示した本発明に従う定着装置を登載した第５図に
示す複写装置において、以下のような実験を行い、本発
明の効果を確認した。即ち、複写装置は、Ａ４判転写紙
が横送りの状態にて転写手段、定着手段、給紙手段を搬
送通過できるものであり、搬送速度は１６５＋ｕ／Ｓｅ
ｃ、毎分２５枚の複写速度を有するものである。この複
写装置を利用し２゜”Ｃ６５％の温湿度で以下のような
実験を行った。転写紙は、ＪＩＳに定められた標準条件
において含有水分！７％、繊維の目の方向が転写紙の長
手方向に垂直で、坪量６２ｇのＡ４判転写紙である。実
験は、最初に排紙ローラーの円筒部材３８．３９のそれ
ぞれ４個が互いに当接するようにスリーブ４４の位置を
設定した状態で横送り３０枚連続片面複写を行った。こ
の時、ガイド爪２０、及びガイド爪２１によって、裏面
複写が行われるように搬送ベルト２５上に、片面複写後
の転写紙が積み重ねられた。この時の、ベルト上の転写
紙のカールの状態を、第４図の片面複写後の転写紙の搬
送方向における側面図に示す。次に、スリーブ４４の位
置をそのままにしてガイド板１８の選択により、上記転
写紙の裏面に、３０枚連続複写動作を行い、複写された
転写紙をガイド爪２００案内によって、排紙トレイ４９
上に積み重ねた。この動作を２０回繰り返し、合計６０
０枚の両面複写を行った。その結果、排紙トレイ４９上
に積み重ねられた転写紙には、繊維の方向にしわの発生
するものがあり、その数は１２５枚であった。又、同じ
く６２ｇ坪量の転写紙を用いて、前記同様連続３０枚片
面複写した後、ガイド爪２０、ガイド爪２１、及びガイ
ド板１Ｂの選択により、上記転写紙の同一面に対して２
度複写する動作を２０回繰り返し、合計６００枚の同一
面複写を行った。その結果、紙しわの発生枚数は５６５
枚であった。次に、排紙ロールの円筒部材のそれぞれの
位置を、第２図（ｂ）の状態になるように、スリーブ４
４を外側へ移動して、前記同様の両面複写実験を行った
。この時の片面複写後の転写紙のカール形状は、第３図
（ａ）に示す通りであり、紙の両端が反り上がった形で
排紙されるため、両面複写する際は中高の状態で定着手
段に搬送突入させることになり、この時の祇しわの発生
枚数は、０枚であった。また、排紙ロールの円筒部材の
それぞれの位置を、第２図（Ｃ）の状態になるように、
スリーブ４４を内側へ移動して、前記同様の同一面複写
実験を行った。この時の片面複写後の転写紙のカール形
状は、第３図（ｂ）に示す通りであり、紙の中央部が浮
いた、中高の状態で排紙されるため、同一面複写の場合
はこのままの状態で送られることになり、この時の祇し
わの発生枚数は５枚となり大幅に紙しわ発生率が低減さ
れた。In the copying machine shown in FIG. 5 equipped with the fixing device according to the invention described above, the following experiment was conducted to confirm the effects of the invention. In other words, the copying device is capable of transporting A4 size transfer paper through the transfer means, fixing means, and paper feeding means in a state of horizontal feeding, and the transport speed is 165+u/Se.
c. It has a copying speed of 25 sheets per minute. Using this copying device, the following experiment was conducted at a temperature and humidity of 2°C and 65%.The transfer paper had a moisture content of 7% under the standard conditions specified by JIS, and the grain direction of the transfer paper was The paper is perpendicular to the longitudinal direction of the paper and has a basis weight of 62 g.The experiment was conducted with the sleeve 44 positioned so that each of the four cylindrical members 38 and 39 of the paper ejection roller abutted against each other. Continuous one-sided copying of 30 sheets was carried out with horizontal feeding. At this time, the transfer sheets after single-sided copying were stacked on the conveyor belt 25 by the guide claws 20 and 21 so that the back side copying was performed. The curled state of the transfer paper on the belt at the time is shown in the side view in the transport direction of the transfer paper after single-sided copying in FIG. , 30 sheets are continuously copied onto the back side of the transfer paper, and the copied transfer paper is guided by the guide pawl 200 to the paper output tray 49.
stacked on top. Repeat this action 20 times for a total of 60
0 double-sided copies were made. As a result, some of the transfer papers stacked on the paper discharge tray 49 had wrinkles in the direction of the fibers, and the number of such papers was 125. Also, after making single-sided copies of 30 consecutive sheets in the same manner as described above using transfer paper with a basis weight of 62 g, by selecting the guide claw 20, guide claw 21, and guide plate 1B, two copies are made on the same side of the transfer paper.
The repeated copying operation was repeated 20 times, making a total of 600 same-sided copies. As a result, the number of paper wrinkles was 565.
It was 1 piece. Next, adjust the positions of the cylindrical members of the paper ejection roll so that they are in the state shown in FIG.
4 was moved to the outside, and a double-sided copying experiment similar to that described above was conducted. At this time, the curled shape of the transfer paper after single-sided copying is as shown in Figure 3 (a), and the paper is ejected with both ends curled up, so when making double-sided copies, it should be in the middle and high position. The sheets were transported into the fixing means, and the number of sheets with wrinkles at this time was zero. Also, adjust the positions of the cylindrical members of the paper ejection roll so that they are in the state shown in FIG. 2(C).
The sleeve 44 was moved inward and a same-sided copying experiment similar to that described above was performed. At this time, the curled shape of the transfer paper after single-sided copying is as shown in Figure 3 (b), and the paper is ejected in a high-centered state with the center part raised, so in the case of single-sided copying, The sheets were sent in this state, and the number of sheets with wrinkles at this time was 5, which significantly reduced the rate of paper wrinkles.
このように同−面或いは両面の複写時において、何れの
場合も定着手段に突入する際は転写紙の先端が中高にカ
ールしていることから祇しわの発生が防止されるもので
ある。In this way, when copying on the same side or on both sides, the leading edge of the transfer paper is curled to a medium height when it enters the fixing means in either case, thereby preventing the occurrence of wrinkles.
発明の効果
本発明によれば、加熱ロール定着手段の排紙側に、転写
紙に転接する円筒部材の位置を変え得るような排紙ロー
ルを配設したものであるから、その結果、転写紙の２回
目以降の複写紙面に合わせて紙しわを排除できるような
カールを付与することが可能となり、既に加熱定着手段
を通過したことのある転写紙であっても、紙しわ等の転
写紙に基づく故障を大幅に低減させることができるもの
であり、工業的価値の極めて大なるものである。Effects of the Invention According to the present invention, a paper discharge roll is provided on the paper discharge side of the heating roll fixing means so that the position of the cylindrical member that contacts the transfer paper can be changed. It is now possible to add curls that can eliminate paper wrinkles according to the surface of the copy paper from the second time onwards, even if the transfer paper has already passed through the heat fixing means. It is possible to significantly reduce the number of failures caused by this method, and is of extremely great industrial value.
第１図は、本発明に従う定着装置の一実施例を示す構成
図、第２図は、排紙ロール部の要部拡大図、第３図は、
片面複写後の転写紙の排紙方向における断面図、第４図
は、片面複写後の転写紙の搬送方向における側面図、第
５図は、本発明の定着手段が適用される電子写真複写装
置の一例を示す内部構造図である。
２・・・・・・感光体ドラム、１３・・・・・・定着手
段、３６．３７・・・・・・排紙ロール、４４・・・・
・・スリー７’、４７．４８・・・・・・ネジ軸。
代理人の氏名 弁理士 中尾敏男 はか１名２６−
ヒートローノし
η−バックアップロール
３３、％−−剥ｍ爪
３６−駅動ロール
ｎ−従動ロール
４０４１−４被日取部材
４−レバー
第 １ 図
ｔFIG. 1 is a configuration diagram showing an embodiment of the fixing device according to the present invention, FIG. 2 is an enlarged view of the main part of the paper discharge roll section, and FIG.
FIG. 4 is a cross-sectional view of the transfer paper after one-sided copying in the paper discharge direction, FIG. 4 is a side view of the transfer paper after one-sided copying in the conveyance direction, and FIG. 5 is an electrophotographic copying apparatus to which the fixing means of the present invention is applied. It is an internal structure diagram showing an example. 2... Photosensitive drum, 13... Fixing means, 36.37... Paper discharge roll, 44...
...Three 7', 47.48...Screw shaft. Name of agent: Patent attorney Toshio Nakao, 1 person, 26-
Heat roller η - Backup roll 33, % - Peeling claw 36 - Station moving roll n - Driven roll 4041-4 Sun-exposed member 4 - Lever 1st figure t
Claims (2)
と、静電潜像保持体に転写紙を転接し、この転写紙にト
ナー像を得るようにした転写手段とを少なくとも具備し
た電子写真複写装置に適用される定着装置であって、前
記定着装置はヒートロールとそのバックアップロールに
より転写トナー像を転写紙に加圧定着する定着手段と、
この定着手段の排紙側に棒状回転部材に間隔を変更し得
るように配設された複数個の円筒部材を連ねた駆動ロー
ルと、棒状回転部材に複数個の円筒部材を略等間隔に配
設固定した従動ロールを一対に組み合わせた排紙ロール
とを備えたことを特徴とする定着装置。(1) At least an image forming means for creating a toner image on the electrostatic latent image holder, and a transfer means for rolling a transfer paper into contact with the electrostatic latent image holder to obtain a toner image on the transfer paper. A fixing device applied to an electrophotographic copying apparatus comprising: a fixing means for pressurizing and fixing a transferred toner image onto a transfer paper using a heat roll and its backup roll;
On the paper ejection side of the fixing means, there is a drive roll in which a plurality of cylindrical members are arranged in a row in a manner that the spacing can be changed on a rod-shaped rotating member, and a plurality of cylindrical members are arranged in a row at approximately equal intervals on the rod-shaped rotating member. A fixing device characterized by comprising a paper ejection roll that is a pair of fixed driven rolls.
あって、駆動ロールの内側の２個の円筒部材が従動ロー
ルの外側の２個の円筒部材に当接出来るように、または
駆動ロールの外側の２個の円筒部材が従動ロールの内側
の２個の円筒部材に当接出来るように、駆動ロールの円
筒部材の間隔を変更させ得る排紙ロールとを備えたこと
を特徴とする特許請求の範囲第（１）項記載の定着装置
。(2) The number of cylindrical members of the drive roll and the driven roll is four each, and the two cylindrical members on the inside of the drive roll can contact the two cylindrical members on the outside of the driven roll, or It is characterized by comprising a paper discharge roll that can change the interval between the cylindrical members of the driving roll so that the two cylindrical members on the outside of the roll can come into contact with the two cylindrical members on the inside of the driven roll. A fixing device according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62111057A JPS63276077A (en) | 1987-05-07 | 1987-05-07 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62111057A JPS63276077A (en) | 1987-05-07 | 1987-05-07 | Fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63276077A true JPS63276077A (en) | 1988-11-14 |
Family
ID=14551310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62111057A Pending JPS63276077A (en) | 1987-05-07 | 1987-05-07 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63276077A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187527A (en) * | 1990-11-06 | 1993-02-16 | Olivetti-Canon Industriale S.P.A. | Device for eliminating the curl of sheets emerging from a fixing station |
-
1987
- 1987-05-07 JP JP62111057A patent/JPS63276077A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187527A (en) * | 1990-11-06 | 1993-02-16 | Olivetti-Canon Industriale S.P.A. | Device for eliminating the curl of sheets emerging from a fixing station |
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