JPS5872955A - Copy paper carrying roller - Google Patents
Copy paper carrying rollerInfo
- Publication number
- JPS5872955A JPS5872955A JP56171589A JP17158981A JPS5872955A JP S5872955 A JPS5872955 A JP S5872955A JP 56171589 A JP56171589 A JP 56171589A JP 17158981 A JP17158981 A JP 17158981A JP S5872955 A JPS5872955 A JP S5872955A
- Authority
- JP
- Japan
- Prior art keywords
- copy paper
- roller
- transfer
- rubber
- transfer roller
- 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
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
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、電子写真感光体等の電荷保持部材上に形成し
た静電潜像をトナーにより可視像化した後、このトナー
像を転写ローラを具える転写装置により、電荷保持部材
に接触して搬送される複写紙上に転写して複写画像を得
る電子写真複写機の搬送ローラ、特に転写ｐ−ラに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention visualizes an electrostatic latent image formed on a charge holding member such as an electrophotographic photoreceptor using toner, and then transfers this toner image by a transfer device including a transfer roller. The present invention relates to a conveyance roller, particularly a transfer roller, of an electrophotographic copying machine which obtains a copy image by transferring it onto a copy paper conveyed in contact with a charge holding member.
従来、電子写真複写機の複写紙搬送ローラはゴムルーラ
とゴムローラ、文はゴム四−ラと金属ローラ又は、感光
体とゴム四−ツの一対で構成され、各ローラに複写紙に
搬送力をつけるための圧力がかけられている。そして、
一対の四−ラのうち、片方を駆動ローラとし、片方を従
動四°−ラとしたり、両方のローラ軸に歯車を設けてか
み合せ両方のローラを回転させたりするものがある。こ
のような書写紙搬送ローラにおいて従来、転写工程と定
着工程又はその中間にあるものは、現像材のトナーでロ
ーラ表面が汚れるのを防止するために、テフロンなどの
離形材を表面にコートしている。Conventionally, the copy paper conveying rollers of electrophotographic copying machines are composed of a rubber ruler and a rubber roller, a rubber roller and a metal roller, or a photoreceptor and a pair of rubber fours, and each roller applies a force to convey the copy paper. There is pressure to do so. and,
Among a pair of four-wheels, one is used as a driving roller and the other is a driven four-wheel, or both roller shafts are provided with gears that mesh with each other to rotate both rollers. Conventionally, in such paper conveyance rollers, the transfer process and the fixing process, or those in between, coated the surface with a release material such as Teflon to prevent the roller surface from being stained with developer toner. ing.
そしてゴムローラの場合は、特に汚れやすいので必ずコ
ートがしである。しかしながら離形材をローラの表面に
コートしであるとその摩擦係数が低下し、搬送力が弱く
なり、安定した麹写紙の搬送ができなくなる。特に、ロ
ーラ転写の場合、他のローラや搬送ガイドの影蕃を受け
、転写むらや同期ずれの原因となる。また、その他の表
面ツーＦされたｐ７うでも、極端記搬送力が落ちるとジ
ャムの原因となる。特に転写ローラの場合、転写バイア
スを印加するために半導電性のゴムローラを用いるが、
このためにゴム材に導電性のカーボンを含有させている
。このようにカーボンを混ぜると必然的に破産が上がり
、摩擦力が低下して据送力が低下してしまう。また、転
写効率な上げるためには中程度以上の硬度とする必要が
あり、この点からも搬送力が低下することになる。In the case of rubber rollers, they are particularly prone to dirt, so be sure to coat them. However, if the release material is coated on the surface of the roller, the coefficient of friction will be lowered, the conveying force will be weakened, and the koji paper cannot be conveyed stably. In particular, in the case of roller transfer, the transfer is affected by other rollers and conveyance guides, causing uneven transfer and out-of-synchronization. In addition, if the conveying force of other surfaces is reduced, it may cause a jam. In particular, in the case of a transfer roller, a semiconductive rubber roller is used to apply a transfer bias.
For this purpose, the rubber material contains conductive carbon. When carbon is mixed in this way, the bankruptcy will inevitably increase, the frictional force will decrease, and the deferred force will decrease. Furthermore, in order to improve the transfer efficiency, it is necessary to have a medium or higher hardness, which also reduces the conveying force.
本発明は上記の諸問題を解決し、現像剤のトナーでｐ−
ラ表面が汚れるのを防止するために、離形材で表面をコ
ートした低摩擦化された搬送ローラでも、複写紙に確実
な搬送力を与える複写紙搬送ローラ、特に転写ローラを
提供することを目的とするものである。The present invention solves the above problems and uses p-
To prevent the surface from becoming dirty, it is desirable to provide a copy paper transport roller, especially a transfer roller, that can provide reliable transport force to copy paper, even if the surface is coated with a release material to reduce friction. This is the purpose.
本発明はトナー像を有する電荷保持部材に複写紙を抑圧
接触させて搬送する転写ローラにおいて、画像域はトナ
ー離形性の良い低摩擦材で構成し、両端の非画像域は高
摩擦材で構成したことを特徴とするものである。The present invention provides a transfer roller that conveys a copy paper in pressure contact with a charge holding member having a toner image, in which the image area is made of a low-friction material with good toner releasability, and the non-image areas at both ends are made of a high-friction material. It is characterized by the following structure.
以下に図面を参照して本発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.
第１図は本発明の転写ｐ−ラを用いた転写機構の一実施
例の一部を断面とした＃１図である。中硬度すなわちＪ
Ｉ８４１度３ｏ −２＊で画像域１１に対応した長さを
有するゴムＩの表面に例えばテフｐンなどの離形材λを
厚さ３２位でコーティングした転写ローラ３と、非画像
域１２に対応した長さを有する低硬度（ＪＩＳ硬度７０
〜２７）のゴムで高摩擦係数（八−〜／、Ｊ ）のゴム
ローラダを軸ｊ上に同一６を一対設は軸ｊを支承し電荷
保持部材である感光体ドラム７に矢印の方向へ圧力Ｐを
図示しない任意の方法で加圧するようにする。また軸ｊ
を通してバイアス電ｊｌｌを接続し接地する。バイアス
電Ｈｚを転写ローラｊを通じてかける方法は図示しない
任意の方法・によるものとする。また、転写ローラｌｌ
１３と同様に感光体ドラム７の非−像域ｊ３に対応した
部分に、低硬度、高摩擦係数のゴムローラ９を胸像域と
対応する部分と同一外径で一体的に構成する。第１図に
おいて、感光体ドラム７の左側ｈ ｋ−＊ ＊ ｔｏを
一体的に設け、駆動歯車／／と噛合させている。駆動歯
車／ｌは図示しない装置の駆動系により駆動される。感
光体ドラム７の中心には一体的に軸１２が通っており軸
／２の両側端部にはｌ対の軸受１３を設は軸１２を支承
している。なお、軸受４ 、 ／Ｊはいずれも図示しな
い軸受支持体により支持されているものとする。符号／
１１は感光体ドラム７と転写ローラ３との間に挾まれ搬
送されながら、トナー像が転写される複写紙である。複
写紙／ヂの輻をｔ４とすると、ａ （’４ ’ｌ）な
る幅を有する複写紙の左右の非画像域が高車、擦材のゴ
ＡＤ−４ダと高摩擦材のゴム覧−ラ９の間に挾まれるこ
とになり、したがって複写紙！＃の確実な搬送ができる
。FIG. 1 is a partially sectional view #1 of an embodiment of a transfer mechanism using a transfer p-ra of the present invention. Medium hardness i.e. J
A transfer roller 3 is coated with a release material λ such as Teflon to a thickness of about 32 on the surface of a rubber I having a length corresponding to the image area 11 at I841 degrees 3o -2*, and the non-image area 12 is coated with a release material λ such as Teflon. Low hardness (JIS hardness 70) with corresponding length
A pair of rubber roller rollers made of rubber with a high coefficient of friction (8-~/, J ) are installed on the shaft j, and apply pressure in the direction of the arrow to the photoreceptor drum 7, which supports the shaft j and is a charge holding member. P is pressurized by an arbitrary method not shown. Also axis j
Connect the bias voltage jll through the terminal and ground it. The bias voltage Hz may be applied through the transfer roller j by any method not shown. In addition, the transfer roller
13, a rubber roller 9 of low hardness and high friction coefficient is integrally formed in a portion of the photosensitive drum 7 corresponding to the non-image area j3 with the same outer diameter as the portion corresponding to the bust area. In FIG. 1, the left side hk-**to of the photosensitive drum 7 is integrally provided and meshed with the drive gear //. The drive gear /l is driven by a drive system of a device not shown. A shaft 12 integrally passes through the center of the photosensitive drum 7, and a pair of bearings 13 are provided at both ends of the shaft 2 to support the shaft 12. It is assumed that both bearings 4 and /J are supported by a bearing support (not shown). code /
Reference numeral 11 denotes a copy sheet on which a toner image is transferred while being sandwiched between the photosensitive drum 7 and the transfer roller 3 and conveyed. Assuming that the convergence of the copy paper is t4, the non-image areas on the left and right sides of the copy paper with a width of a ('4'l) are the high wheels, the friction material Go AD-4 da, and the high friction material Rubber Mi- It will be sandwiched between La 9 and therefore copy paper! # can be transported reliably.
第２図は本発明の転写ローラの他の実施例の一部破断組
立線図である。説明を簡易にするため第１ｖ！Ｊと同一
部分は同じ符号を付す。この実施例は感光体ドラム７に
おいて、画像域＠１５と非画像域部ｔ６の間に輻１７の
溝／ｊを感光体ドラムラの全周にわたって削設する。こ
の溝／Ｊには感光体ドラム７から複写紙ｌ＃を剥離する
ための剥離爪１６を侵入させる。以上のごとく構成した
ので、剥離爪７ごにより複写紙ｌ−を感光体ドラム７か
ら確実に剥離することができると共に高摩擦材のゴム田
−ラダとデとの間で複写紙／ｌの両端の非画像域を挾む
ことになるので複写紙を確実に搬送することができ、し
かも転写ローラ３の大部分はトナー離形性の良い低摩擦
材のローラλで造られているため、トナーにより汚れる
ことがない。FIG. 2 is a partially cutaway assembly diagram of another embodiment of the transfer roller of the present invention. In order to simplify the explanation, 1st v! The same parts as J are given the same symbols. In this embodiment, in the photoreceptor drum 7, a groove /j of a radius 17 is cut between the image area @15 and the non-image area t6 over the entire circumference of the photoreceptor drum. A peeling claw 16 for peeling the copy paper l# from the photosensitive drum 7 is inserted into this groove /J. With the above structure, the copy paper l- can be reliably peeled off from the photoreceptor drum 7 by the peeling claw 7, and both ends of the copy paper l- can be removed between the high-friction rubber pads and d. Since the non-image area of the transfer roller 3 is sandwiched, the copy paper can be transported reliably.Moreover, most of the transfer roller 3 is made of a roller λ made of a low-friction material that has good toner release properties, so the toner can be transported securely. It won't get dirty.
以上述べたように本発明によれば、惨°写紙搬送ローラ
、特に転写ローラの非画像域を高摩擦材で構成したこと
により、複写紙搬送中複写紙先端が他の部材に当っても
スリップを起すことなく確実に搬送することができると
いう効果が得られる。As described above, according to the present invention, by configuring the non-image area of the copy paper transport roller, especially the transfer roller, with a high friction material, even if the leading edge of the copy paper hits other members while the copy paper is being transported, The effect of being able to reliably transport without causing slippage can be obtained.
特に、ローラ転写の場合、転写効率上、転写ＥＪ：、に
限度があり、余り高い転写圧を与′えなくても転写部で
のスリップがなく確実な搬送をすることができ、転写ム
ラや同期ずれが起ることはなく良好なコピーが得られる
。In particular, in the case of roller transfer, there is a limit to the transfer EJ due to transfer efficiency, so even if you do not apply too high a transfer pressure, reliable conveyance can be achieved without slipping at the transfer section, and transfer unevenness can be avoided. Good copies can be obtained without causing synchronization errors.
なお゛、本発明は上記の実施例に限定されるものでなく
幾多の変形や変更が可能で゛ある０例えば上述した例で
は感光ドラムの両端にも低摩擦材のゴムーーラタを設け
たが、これは必らずしも必要でない。It should be noted that the present invention is not limited to the above-described embodiments, and can be modified in many ways. is not necessarily necessary.
第１図は本発明の転写ローラを用いた転写機構の一実施
例の一部を断面とした１１図、第１図は本発明の転写ロ
ーラの他の実施例の一部破断紹立線図である。
ｌ・・・コム、コ・・・１１材、Ｊ・・・転写ローラ、
ダ・・・ゴムローラ、！・・・軸、６・・・軸承、７・
・・感光体ドラム、ｌ・・・バイアス電源、９・・・ゴ
ムルーラ、１０・・・歯車、ｌｌ・・・駆動歯車、 ／
Ｊ・・・軸、１３・・・軸受、／チ・・・複写紙、１３
・・・溝、ム・・・剥離爪、ｊｌ・・・転写ローラの画
像域、ｅ２・・・転写ローラ非画像域、ｔ３・・・感光
体ドラムの非画像域、ｔ４・・・複写紙の幅、１５・・
・感光体ドラムの画像域、ｔ６・・・感光体ドラムの非
画像域、ｔ７・・・溝の輻、Ｐ・・・圧力。FIG. 1 is a partial cross-sectional view of an embodiment of a transfer mechanism using a transfer roller of the present invention, and FIG. 1 is a partially cutaway diagram of another embodiment of the transfer roller of the present invention. It is. L...Com, Co...11 material, J...Transfer roller,
Da... rubber roller! ...shaft, 6...shaft bearing, 7.
... Photosensitive drum, l... Bias power supply, 9... Rubber ruler, 10... Gear, ll... Drive gear, /
J...shaft, 13...bearing, /CH...copy paper, 13
...Groove, m...Peeling claw, jl...Image area of transfer roller, e2...Non-image area of transfer roller, t3...Non-image area of photoreceptor drum, t4...Copy paper Width of 15...
- Image area of the photoreceptor drum, t6... Non-image area of the photoreceptor drum, t7... Convergence of the groove, P... Pressure.
Claims (1)
させて搬送する転写ローラにおいて、画像域はトナー＃
ｌ形性の良い低摩擦材で＃ＩＩ成し、両端の非画像域は
高摩擦材で構成したことを特徴とする電子写真複写機の
転送ローラ。L In a transfer roller that conveys copy paper by pressing it into contact with a charge holding member having a toner image, the image area is
A transfer roller for an electrophotographic copying machine, characterized in that #II is made of a low-friction material with good l-shape, and the non-image areas at both ends are made of a high-friction material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56171589A JPS5872955A (en) | 1981-10-27 | 1981-10-27 | Copy paper carrying roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56171589A JPS5872955A (en) | 1981-10-27 | 1981-10-27 | Copy paper carrying roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5872955A true JPS5872955A (en) | 1983-05-02 |
Family
ID=15925954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56171589A Pending JPS5872955A (en) | 1981-10-27 | 1981-10-27 | Copy paper carrying roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5872955A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5357325A (en) * | 1988-01-30 | 1994-10-18 | Canon Kabushiki Kaisha | Image forming apparatus having transfer member rotating faster than image bearing member |
| JPH07175399A (en) * | 1994-04-21 | 1995-07-14 | Canon Inc | Image forming device |
| EP1031892A2 (en) * | 1999-02-26 | 2000-08-30 | Sharp Kabushiki Kaisha | Image forming apparatus |
-
1981
- 1981-10-27 JP JP56171589A patent/JPS5872955A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5357325A (en) * | 1988-01-30 | 1994-10-18 | Canon Kabushiki Kaisha | Image forming apparatus having transfer member rotating faster than image bearing member |
| JPH07175399A (en) * | 1994-04-21 | 1995-07-14 | Canon Inc | Image forming device |
| EP1031892A2 (en) * | 1999-02-26 | 2000-08-30 | Sharp Kabushiki Kaisha | Image forming apparatus |
| EP1031892A3 (en) * | 1999-02-26 | 2004-01-07 | Sharp Kabushiki Kaisha | Image forming apparatus |
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