JPH0159581B2 - - Google Patents
Info
- Publication number
- JPH0159581B2 JPH0159581B2 JP55113229A JP11322980A JPH0159581B2 JP H0159581 B2 JPH0159581 B2 JP H0159581B2 JP 55113229 A JP55113229 A JP 55113229A JP 11322980 A JP11322980 A JP 11322980A JP H0159581 B2 JPH0159581 B2 JP H0159581B2
- Authority
- JP
- Japan
- Prior art keywords
- image
- guide member
- unfixed
- charge
- paper
- 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
- 239000000463 material Substances 0.000 claims description 27
- 239000012212 insulator Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000126 substance Substances 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
Description
【発明の詳細な説明】
本発明は画像支持材が未定着画像を担持した
後、その未定着画像を上記画像支持材に定着する
画像記録装置に関するものであり、特に電気的に
未定着画像が画像支持材に支持される画像記録装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image recording device that fixes the unfixed image on the image support material after the image support material carries the unfixed image. The present invention relates to an image recording device supported by an image support material.
従来、電子写真等の画像記録装置において、画
像付与部署（例えば転写部署）で未定着画像を担
持せしめた画像支持材をその画像付与部署から定
着部署まで、移送する搬送手段は、定着部署へそ
の未定着画像を担持した画像支持材を送り込む為
定着部署に近接配置された案内部材を有してお
り、定着部署で画像支持材に生じるしわや未定着
画像の飛散などによる定着の不良を改善するた
め、上記案内部材の改良が行なわれている。しか
し画像支持材を摺動案内して定着部署に送り込む
この案内部材の改良は主に、画像支持材との接触
抵抗を低下させるためのもの又は、案内部材の形
状を変え画像支持材の定着ローラ対間への進入状
態を考慮したもの等であり、画像支持材が保持し
ている電荷に関して案内部材を改良したものは従
来なかつた。 Conventionally, in an image recording apparatus such as an electrophotographic device, a conveying means for transporting an image support material carrying an unfixed image from an image applying department (e.g., a transfer department) to a fixing department is used. It has a guide member placed close to the fixing section to feed the image supporting material carrying the unfixed image, and improves fixing defects caused by wrinkles on the image supporting material and scattering of the unfixed image in the fixing section. Therefore, improvements have been made to the above-mentioned guide member. However, improvements to this guide member, which slides and guides the image support material and sends it to the fixing section, are mainly aimed at lowering the contact resistance with the image support material, or by changing the shape of the guide member and moving the fixing roller of the image support material. Conventionally, there has been no guide member that takes into account the state of entry into the space between the pairs, and has improved the guide member with regard to the charge held by the image supporting material.
しかしながら、画像の質の尚一層の向上を考虜
した場合、如上の案内部材の電気的性質を無視し
得ない要因であることが判明した。例えば、感光
ドラム上に現像後形成された可視像が、画像支持
部材上に転写される電子写真複写機の転写過程で
は、転写帯電器で約７キロボルトの高電圧がかけ
られ、画像支持部材の感光ドラムに対しない面、
即ち裏面から現像剤の有する電荷と逆極性の電荷
を画像支持部材に与え、このことにより上記現像
剤のつくる可視像が感光ドラムから画像支持部材
に転写され、上記画像支持部材が未定着画像を支
持した状態になる。この際上記未定着画像支持部
材の裏面には約１キロボルトの電荷が与えられ
る。この裏面の電荷量は、上記転写帯電器による
印加電圧の量又は画像支持部材の質又は現像剤の
画像支持部材に占める割合等により変動するが、
多くの場合未定着画像を有する面よりも多い。従
つて、未定着画像支持部材の表と裏の両面が有す
る電荷は、異なつた量であり、上記未定着画像支
持部材は電気的にアンバランスな状態にある。 However, when considering further improvement in image quality, it has been found that the electrical properties of the guide member described above are a factor that cannot be ignored. For example, in the transfer process of an electrophotographic copying machine in which a visible image formed on a photosensitive drum after development is transferred onto an image supporting member, a high voltage of about 7 kilovolts is applied by a transfer charger, and a high voltage of approximately 7 kilovolts is applied to the image supporting member. The surface not facing the photosensitive drum,
That is, a charge having a polarity opposite to that of the developer is applied from the back side to the image supporting member, whereby the visible image formed by the developer is transferred from the photosensitive drum to the image supporting member, and the unfixed image is transferred from the image supporting member to the image supporting member. will be in a state of support. At this time, a charge of approximately 1 kilovolt is applied to the back surface of the unfixed image supporting member. The amount of charge on the back side varies depending on the amount of voltage applied by the transfer charger, the quality of the image supporting member, the ratio of developer to the image supporting member, etc.
Often more than surfaces with unfused images. Therefore, the front and back surfaces of the unfixed image supporting member have different amounts of charge, and the unfixed image supporting member is in an electrically unbalanced state.
この状態で上記未定着画像支持部材を搬送する
と搬送ベルトの様な上記支持部材をそのベルトに
乗せて送る場合は、上記支持部材が上記ベルトに
静電的に吸着するので安定した搬送ができる。し
かし、上記ベルトから定着装置の案内部材へ未定
着画像支持部材が移ると、未定着画像支持部材と
上記案内部材とは摺動接触し、摩擦帯電を起こ
す。従来、この接触抵抗を単に少なくするため、
上記案内部材の上記未定着画像支持部材に接触す
る面にリブをつけたり、テフロンコートなどをコ
ーテイングする工夫がなされていた。 When the unfixed image supporting member is conveyed in this state, when the supporting member such as a conveyor belt is placed on the belt and conveyed, the supporting member is electrostatically attracted to the belt, so that stable conveyance is possible. However, when the unfixed image supporting member moves from the belt to the guide member of the fixing device, the unfixed image supporting member and the guide member come into sliding contact, causing frictional electrification. Conventionally, in order to simply reduce this contact resistance,
Efforts have been made to provide ribs on the surface of the guide member that comes into contact with the unfixed image supporting member, or to coat the guide member with a Teflon coat or the like.
このような改善策では防ぎきれない障害が生じ
てきた。即ち、未定着画像を形成する現像剤が、
現像剤粒子間の凝集力の弱いものであつたり、画
像支持体への保持力が弱いもの、つまり現像剤自
身のもつている電荷が小さいものである場合、そ
の未定着画像は、外部又は上記摩擦帯電等の電気
的な影響を受けやすく、その画像の飛散等の障害
が引き起こされる。又、上記案内部材の材質を導
電性のものとすると未定着画像支持部材の案内部
材に接する面に担持されていた電荷が一度に案内
部材に逃げてしまい、このとき生じる電界によつ
て画像が乱される。又上記案内部材の材質を高絶
縁性のものとすると上記摩擦帯電によつて生じた
電荷が案内部材の画像支持部材と接する面に徐々
に蓄積され、帯電量が多くなり、未定着画像を乱
す電界を生じる様になる。このような帯電量の蓄
積は、摩擦帯電によるものとは別に、画像支持体
の案内部材に接する面に担持された電荷にもよ
る。 Problems have arisen that cannot be prevented by such improvement measures. That is, the developer that forms the unfixed image is
When the cohesive force between developer particles is weak or the retention force on the image support is weak, that is, when the developer itself has a small electric charge, the unfixed image is transferred to the outside or above. It is susceptible to electrical influences such as frictional charging, which causes problems such as scattering of the image. Furthermore, if the guide member is made of a conductive material, the charge carried on the surface of the unfixed image supporting member that is in contact with the guide member will escape to the guide member at once, and the electric field generated at this time will cause the image to be distorted. Disturbed. Furthermore, if the guide member is made of a highly insulating material, the charge generated by the frictional charging will gradually accumulate on the surface of the guide member that comes into contact with the image supporting member, increasing the amount of charge and disturbing the unfixed image. It begins to generate an electric field. The accumulation of the amount of charge is caused not only by frictional charging but also by charges carried on the surface of the image support that is in contact with the guide member.
逆に上記の不都合は画像支持部材に支持されて
いる未定着画像の画像粒子間の凝集力又は上記画
像支持部材の上記画像粒子保持力が強い場合にも
生じ得る。 Conversely, the above-mentioned disadvantages may also occur when the cohesive force between the image particles of the unfixed image supported on the image supporting member or the image particle retention force of the image supporting member is strong.
本発明は以上の問題点を解決し、未定着画像を
担持している画像支持部材への急激な電荷量の変
化を与えることなく且つ未定着画像を乱すことな
く担持するための画像支持部材裏面の電荷のみを
残し余分な電荷を徐々に除電する体積抵抗率が
106Ω・cm以上であり且つ表面抵抗率が166Ω以上
109Ω以下のものである搬送部材を提供するもの
である。 The present invention solves the above-mentioned problems, and provides a back side of an image supporting member for carrying an unfixed image without causing a sudden change in the amount of charge to the image supporting member carrying the unfixed image and without disturbing the unfixed image. The volume resistivity gradually eliminates the excess charge, leaving only the charge of
10 6 Ω・cm or more, and the surface resistivity is 16 6 Ω or more
A conveying member having a resistance of 10 9 Ω or less is provided.
さらに実験結果を述べながら本発明の説明を行
なうことにする。 Further, the present invention will be explained while describing experimental results.
第１図は本発明を実施する上での画像記録装置
の一つである電子写真装置の画像を形成する主な
プロセスを説明するための図である。１は定着部
署で１1は定着ローラ、１2は圧力ローラで互いに
圧接し矢印の方向に回転する。１７は感光ドラム
であり、その画像付与部署には転写帯電器１２が
近接配設されている。２は上記定着ローラ対に近
接配設された案内部材で紙等の画像支持材３が未
定着画像６を担持するために十分な電荷のみを残
し他の余分な電荷を紙３から徐々に除去し、さら
に案内部材表面に除去された電荷が蓄積しないよ
うに徐々にその電荷を他へ逃がす材質のものであ
る。即ち、その体積抵抗率が106Ω・cm以上であ
り、且つその表面抵抗率が106Ω以上109Ω以下の
範囲の材質である。 FIG. 1 is a diagram for explaining the main process of forming an image in an electrophotographic apparatus, which is one of the image recording apparatuses for carrying out the present invention. 1 is a fixing section, 1 1 is a fixing roller, and 1 2 is a pressure roller, which press against each other and rotate in the direction of the arrow. Reference numeral 17 denotes a photosensitive drum, and a transfer charger 12 is disposed close to the image-applying section of the photosensitive drum. Reference numeral 2 denotes a guide member disposed close to the pair of fixing rollers, which gradually removes unnecessary charges from the paper 3 while leaving only sufficient charge for the image support material 3 such as paper to carry the unfixed image 6. Furthermore, the guide member is made of a material that gradually releases the removed charges to prevent them from accumulating on the surface of the guide member. That is, the material has a volume resistivity of 10 6 Ω·cm or more and a surface resistivity of 10 6 Ω or more and 10 9 Ω or less.
周知のように感光ドラム１７は複写信号を受け
て矢印の方向に回転し、前除電帯電器７によつて
前除電される。次に感光ドラム１７は一次帯電器
８により帯電され、次に二次帯電器９によつて二
次除電を受け同時に像露光される。そして次に全
面露光を受けることによりドラム１７には画像部
の表面電位が例えば正極性のときは正極性の潜像
が形成される。この潜像画像は現像器１０におい
て現像され可視像となる。この現像法には例えば
一成分磁性現像剤（磁性トナー）１４をマグネツ
トローラ１０1によつて穂立てつつ回転スリーブ
１０2によつて搬送し、ドラム１７と対向する所
で潜像の画像部にその現像剤１４をスリーブ１０
２側から飛翔付着させる方法が採用できる。勿論
他の現像法も採用してもかまわない。いずれにせ
よ前記の如く画像部表面電位が正極性であれば現
像剤を構成するトナーは負に帯電したものであ
る。紙３は、ガイド板１１上を通つてドラム１７
に接近し、その可視像を受け取るべくドラム１７
に接触する。転写帯電器１２により紙３の裏面は
トナーと逆極性に帯電せしめられ、これによつて
紙３に転写された後未定着画像６として紙３上に
電気的に担持される。この後感光ドラム１７はそ
の表面をローラ１６によりクリーニングされ次の
複写に備える。一方、未定着画像６を担持した紙
３は、矢印方向に回転するローラ１３によつて矢
印方向に回転する搬送ベルト１５上に送られ紙３
の下面にある正電荷５によつて搬送ベルト１５に
密着して画像６を乱すことなく案内部材２まで送
られる。その後案内部材２上を紙３は摺動通過し
て未定着画像６を担持するのに十分な電荷のみを
その裏面に保持して定着部署１において１1，１2
のローラ対のニツプ部へ導かれ、未定着画像６は
その画像を乱されることなくローラ対１1，１2に
よつて紙３に定着される。 As is well known, the photosensitive drum 17 rotates in the direction of the arrow in response to a copy signal, and is pre-discharged by the pre-discharge charger 7 . Next, the photosensitive drum 17 is charged by the primary charger 8, and then undergoes secondary charge removal by the secondary charger 9, and is image-exposed at the same time. Then, when the surface potential of the image area is, for example, positive, a positive latent image is formed on the drum 17 by being exposed to light over the entire surface. This latent image is developed in a developing device 10 to become a visible image. In this developing method, for example, a one-component magnetic developer (magnetic toner) 14 is spiked by a magnet roller 10 1 and conveyed by a rotating sleeve 10 2 , and the image area of the latent image is conveyed by a rotating sleeve 10 2 . The developer 14 is transferred to the sleeve 10.
A method of flying attachment from the second side can be adopted. Of course, other developing methods may also be used. In any case, as described above, if the surface potential of the image area is positive, the toner constituting the developer is negatively charged. The paper 3 passes over the guide plate 11 and reaches the drum 17.
drum 17 to approach and receive a visible image of it.
come into contact with. The transfer charger 12 charges the back side of the paper 3 to a polarity opposite to that of the toner, and after being transferred to the paper 3, the image is electrically carried on the paper 3 as an unfixed image 6. Thereafter, the surface of the photosensitive drum 17 is cleaned by the roller 16 in preparation for the next copying. On the other hand, the paper 3 carrying the unfixed image 6 is sent onto a conveyor belt 15 rotating in the direction of the arrow by a roller 13 rotating in the direction of the arrow.
Due to the positive charge 5 on the lower surface of the image 6, the image 6 is brought into close contact with the conveyor belt 15 and is conveyed to the guide member 2 without disturbing the image 6. The paper 3 then slides past the guide member 2 and enters the fixing station 1 with only enough charge on its back side to carry the unfixed image 6 1 1 , 1 2
The unfixed image 6 is then fixed onto the paper 3 by the roller pair 1 1 and 1 2 without disturbing the image.
この未定着画像６を担持している紙３が案内部
材２を摺動通過し定着部署で定着されるまでをさ
らに詳細に第２図を参照して説明する。案内部材
２の形状については、しわ防止の効果を発揮する
形状のものである方が良い。例えば本実施例の案
内部材２はローラ対１1，１2に面している前方縁
がその両端部よりも中央部がローラ対側に突き出
した形状を有している。しかし、かかる構成は必
須のものではない。 The process from when the paper 3 carrying the unfixed image 6 slides past the guide member 2 until it is fixed at the fixing station will be described in more detail with reference to FIG. 2. Regarding the shape of the guide member 2, it is better to have a shape that exhibits the effect of preventing wrinkles. For example, the guide member 2 of this embodiment has a front edge facing the pair of rollers 1 1 and 1 2 in such a shape that its central portion protrudes more toward the roller pair than both ends thereof. However, such a configuration is not essential.
未定着画像６を形成するトナーの電荷４は負極
性であり、紙３の下面にある未定着画像を担持す
るための電荷５は正極性であり、これらの極性の
違いによつて画像６は安定し、ベルト１５から次
の案内部材２へ紙３は移送される。この時紙３の
裏面には、未定着画像の負電荷４の量よりも多量
の正電荷５がアンバランスに帯電しており、案内
部材２上を紙３が摺動することによつて、紙３の
裏面にある正電荷５の未定着画像を担持するのに
十分な電荷は紙３の裏面に残され、他の余分な電
荷又は、その摺動による摩擦電荷等は案内部材２
の表面を通つて徐々に紙３から除去される。これ
らの除去された電荷は案内部材表面に蓄積される
と徐々に案内部材を介して放電され、全体として
はその表面に蓄積されない。そして紙３は電気的
にバランスが良くなり、その安定した状態で未定
着画像が定着ローラ対１1，１2によつて紙３に定
着され、飛散などのない優れた画像となる。 The charge 4 of the toner that forms the unfixed image 6 is of negative polarity, and the charge 5 for supporting the unfixed image on the bottom surface of the paper 3 is of positive polarity.Due to the difference in polarity, the image 6 The paper 3 is then stabilized and transferred from the belt 15 to the next guide member 2. At this time, the back surface of the paper 3 is unbalanced with a larger amount of positive charges 5 than the amount of negative charges 4 of the unfixed image, and as the paper 3 slides on the guide member 2, Sufficient charge to carry the unfixed image of the positive charge 5 on the back side of the paper 3 is left on the back side of the paper 3, and other excess charge or frictional charge due to its sliding is transferred to the guide member 2.
is gradually removed from the paper 3 through the surface of the paper 3. Once these removed charges have accumulated on the guide member surface, they are gradually discharged through the guide member and are not accumulated on its surface as a whole. Then, the paper 3 becomes electrically balanced, and in this stable state, the unfixed image is fixed on the paper 3 by the pair of fixing rollers 1 1 and 1 2 , resulting in an excellent image free from scattering.
ところで前述したように案内部材の表面抵抗率
及び体積抵抗率の値を１０6Ω以上109Ω以下、
106Ω・cm以上とした理由は、それらの抵抗率が
小さすぎると紙３の案内部材２に接触する面の電
荷５が案内部材２を介して急激に放電し未定着画
像６の飛び散りを生じせしめ又、その表面抵抗率
が大きすぎると、電荷５又は上記摺動による摩擦
電荷等が徐々に放電されずに案内部材２の表面上
に多大に蓄積され、画像をその電荷のつくる電界
により乱すことになるからであり、これらの問題
を解決するための実験結果より決定されている。 By the way, as mentioned above, the values of the surface resistivity and volume resistivity of the guide member are 10 6 Ω or more and 10 9 Ω or less,
The reason why it is set to 10 6 Ω・cm or more is that if the resistivity is too small, the charge 5 on the surface of the paper 3 that contacts the guide member 2 will be rapidly discharged via the guide member 2, causing the unfixed image 6 to scatter. Furthermore, if the surface resistivity is too large, the electric charge 5 or the frictional electric charge caused by the above-mentioned sliding will not be gradually discharged and will accumulate on the surface of the guide member 2 to a great extent, causing the image to be distorted due to the electric field created by the electric charge. This is because it will cause disturbances, and has been determined based on experimental results to solve these problems.
以上のような案内部材の材質は、例えばガラス
あるいは高絶縁性のポリカーボネート、ABS、
フエノール等の樹脂に導電性の炭素繊維などを分
散させ、その表面抵抗率を108〜1011Ω位に下げた
もので与えられる。又、セラミツク例えばAl2O3
系セラミツクに有機染料例えばクロム染料又はカ
ーボンブラツク等の抵抗率を下げる物質を混入す
ることにより表面抵抗率を108〜1011Ω位に調整し
ても良い。上記ガラスは体積抵抗率が1015Ω以上
と高い割に表面抵抗率が約106〜108Ωと低い材質
であるので良好であるが、湿度により搬送性が著
しく低下するので表面にリブを多数設けておくこ
とが好ましい。又ガラスや樹脂は容易に好みの形
状に製造できるし、寸法安定性が良いので製作上
好ましい。 The material of the guide member mentioned above is, for example, glass, highly insulating polycarbonate, ABS,
It is obtained by dispersing conductive carbon fibers in a resin such as phenol, and lowering the surface resistivity to about 10 8 to 10 11 Ω. Also, ceramics such as Al 2 O 3
The surface resistivity may be adjusted to about 10 8 to 10 11 Ω by mixing a resistivity-lowering substance such as an organic dye, chromium dye or carbon black into the ceramic system. The glass mentioned above is a good material because it has a high volume resistivity of 10 15 Ω or more and a low surface resistivity of about 10 6 to 10 8 Ω, but since the conveyability deteriorates significantly due to humidity, it is necessary to add ribs to the surface. It is preferable to provide a large number of them. Furthermore, glass and resin can be easily manufactured into desired shapes and have good dimensional stability, so they are preferable in terms of manufacturing.
実験結果として上記現像剤がその現像剤を構成
している粒子の凝集力が非常に弱い場合、上記ガ
ラスと金属とフエノール樹脂単体との３つの案内
部材を使用して第１図に於ける装置でその案内部
材が（未定着）画像に及ぼす効果について実験し
たものを述べる。 As a result of an experiment, if the cohesive force of the particles constituting the developer is very weak, the apparatus shown in FIG. In this section, we will describe an experiment conducted on the effect of the guide member on (unfixed) images.
金属性案内部材の場合、連続コピーを行なうと
紙の１枚目から画像支持材上の未定着画像は案内
部材を過ぎる状態から乱れ始め、定着後の画像は
著しく乱れてしまつた。 In the case of a metal guide member, when continuous copying was performed, the unfixed image on the image support material from the first sheet of paper began to become distorted after passing the guide member, and the image after fixing was significantly disturbed.
次にフエノール樹脂性案内部材の場合は、紙の
１枚目から８乃至10枚目くらいまでは画像は乱れ
なかつたが、10枚目を過ぎるあたりから案内部材
に紙が吸収されるように搬送され画像が乱れ、み
にくいものになつた。例えばA3のように大きい
紙であると、紙の後半だけの画像が周囲に飛び散
り画質が低下することが見られた。 Next, in the case of the phenolic resin guide member, the image was not distorted from the first sheet of paper until about the 8th to 10th sheet, but after the 10th sheet, the paper was transported so that it was absorbed by the guide member. The image was distorted and looked ugly. For example, if the paper is large like A3, the image on only the second half of the paper will be scattered around, reducing the image quality.
しかし、ガラス製案内部材の場合は、100枚以
上連続コピーを行なつても、画像の飛び散りは全
くなく良好な画像が得られた。 However, in the case of the glass guide member, good images were obtained with no image scattering at all even after continuous copying of 100 or more sheets.
このような実験結果から、体積抵抗106Ω・cm
以上、表面抵抗106Ω以上109Ω以下であるガラス
等のものは、他の金属、フエノール樹脂よりも優
れた効果を示すことがわかる。 From these experimental results, the volume resistance is 10 6 Ω・cm
From the above, it can be seen that materials such as glass having a surface resistance of 10 6 Ω or more and 10 9 Ω or less exhibit better effects than other metals and phenolic resins.
本発明は、上記実施例中では搬送ベルトに於け
る紙３の搬送性を考慮し案内部材に適用されてい
るが勿論他の搬送部材にも適用できる。また上記
実施例では現像方法や、現像剤、画像支持材、定
着方法等を限定しているが、本発明は、これらの
限定に限らず搬送部材が画像支持材と接触するも
ので電気的に未定着画像を担持する画像支持材を
用いる画像記録装置にすべて適用できる。 In the above embodiments, the present invention is applied to the guide member in consideration of the conveyance of the paper 3 on the conveyor belt, but it can of course be applied to other conveyor members. Further, in the above embodiments, the developing method, developer, image supporting material, fixing method, etc. are limited, but the present invention is not limited to these limitations, and the conveying member is in contact with the image supporting material, and the present invention is not limited to these limitations. It is applicable to all image recording devices that use an image support material that carries an unfixed image.
前述した体積抵抗率や表面抵抗率の測定法につ
いては、第２図（体積抵抗率測定回路）と第３図
（表面抵抗率測定回路）とに示した様に測定を行
なう。案内部材２を主電極１８と対向電極２０と
ではさみ、第２図、第３図の各配線を行ない印加
電圧Ｖ、電流計Ｉをつなぐ。この際案内部材表面
を通して電流計Ｉに入り込む電流を防ぐため円環
状の電極１９を主電極の周囲に置きこの電極を電
圧Ｖの帰線につなぐ。 Regarding the method of measuring the volume resistivity and surface resistivity described above, measurements are performed as shown in FIG. 2 (volume resistivity measuring circuit) and FIG. 3 (surface resistivity measuring circuit). The guide member 2 is sandwiched between the main electrode 18 and the counter electrode 20, and the wiring shown in FIGS. 2 and 3 is performed to connect the applied voltage V and the ammeter I. At this time, in order to prevent current from entering the ammeter I through the surface of the guide member, an annular electrode 19 is placed around the main electrode and this electrode is connected to the return wire of the voltage V.
以上によつて第２図より体積抵抗率R1は、案
内部材の厚さｔ、主電極の径D1、案内部材電流I1
により、
R1＝Ｖ／Ｉ・πD2／1／４・１／ｔ（Ω・cm）
で求まり、表面抵抗率R2は主電極径D1主電極一
高圧電極内径D2により、
R2＝Ｖ／Ｉ・π（D2＋D1）／D2−D1（Ω）
で求められる。 From the above, from FIG. 2, the volume resistivity R 1 is determined by the thickness t of the guide member, the diameter D 1 of the main electrode, and the guide member current I 1
Therefore, R 1 = V/I・πD 2 / 1 /4・1/t (Ω・cm), and the surface resistivity R 2 is determined by main electrode diameter D 1 main electrode - high voltage electrode inner diameter D 2 , R 2 =V/I・π(D 2 +D 1 )/D 2 −D 1 (Ω).
以上のように、本発明を用いることによつて画
像支持材上の未定着画像の飛散を全く防止するこ
とができ、その画像の飛散による画像記録装置内
の汚れ等を防止することができた。又、本発明を
案内部材に適用することによつて案内部材と定着
ローラ間の間隔を狭くすることができて画像支持
材のしわ発生を防止する効果を向上することが可
能になつた。 As described above, by using the present invention, it was possible to completely prevent the unfixed image from scattering on the image support material, and it was also possible to prevent the inside of the image recording device from being contaminated due to the scattering of the image. . Further, by applying the present invention to the guide member, the distance between the guide member and the fixing roller can be narrowed, and the effect of preventing wrinkles on the image support material can be improved.
第１図は、電子写真による画像記録装置に本発
明を実施した説明図であり、第２図は本発明の一
実施例の説明のための図であり、第３図、第４図
はそれぞれ搬送部材（実施例では案内部材）の体
積抵抗率、表面抵抗率を測定するための回路図で
ある。
１1……定着ローラ、１2……圧力ローラ、２…
…案内部材、３……画像支持材、４……負電荷、
５……正電荷、６……未定着画像、１０……現像
器、１２……転写帯電器、１５……搬送ベルト、
１７……感光ドラム。
FIG. 1 is an explanatory diagram in which the present invention is implemented in an electrophotographic image recording device, FIG. 2 is a diagram for explaining one embodiment of the present invention, and FIGS. 3 and 4 are respectively FIG. 3 is a circuit diagram for measuring volume resistivity and surface resistivity of a conveying member (guiding member in the example). 1 1 ... Fixing roller, 1 2 ... Pressure roller, 2 ...
...Guiding member, 3... Image support material, 4... Negative charge,
5...Positive charge, 6...Unfixed image, 10...Developer, 12...Transfer charger, 15...Transport belt,
17...Photosensitive drum.
Claims (1)
持せしめた後その未定着画像を定着部署で画像支
持材に定着する画像記録装置に於いて、画像付与
部署と定着部署との間で上記画像支持材の搬送に
関与する搬送部材は、体積抵抗率が106Ω・cm以
上であり且つその表面抵抗率が106Ω以上109Ω以
下の範囲内であることを特徴とする画像記録装
置。 ２ 上記搬送部材が少なくとも一対のローラーか
らなる定着ローラ対のニツプ部へ未定着画像を担
持した画像支持材を搬送する、定着ローラ対に近
接配置された案内部材である特許請求の範囲第１
項記載の画像記録装置。 ３ 上記搬送部材はその体積抵抗率がその表面抵
抗率よりも大である絶縁体よりなるものである特
許請求の範囲第１項又は第２項記載の画像記録装
置。[Scope of Claims] 1. In an image recording apparatus in which an unfixed image is carried on an image support material in an image application section and then the unfixed image is fixed on the image support material in a fixing section, an image application section and a fixing section are provided. The conveying member involved in conveying the image supporting material shall have a volume resistivity of 10 6 Ω·cm or more and a surface resistivity within the range of 10 6 Ω or more and 10 9 Ω or less. Features of the image recording device. 2. Claim 1, wherein the conveying member is a guide member disposed close to a pair of fixing rollers, which conveys an image support material carrying an unfixed image to a nip portion of a pair of fixing rollers, which includes at least one pair of rollers.
The image recording device described in Section 1. 3. The image recording apparatus according to claim 1 or 2, wherein the conveying member is made of an insulator whose volume resistivity is higher than its surface resistivity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11322980A JPS5737362A (en) | 1980-08-18 | 1980-08-18 | Image recording apparatus |
| US06/291,632 US4369729A (en) | 1980-08-18 | 1981-08-10 | Image recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11322980A JPS5737362A (en) | 1980-08-18 | 1980-08-18 | Image recording apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5737362A JPS5737362A (en) | 1982-03-01 |
| JPH0159581B2 true JPH0159581B2 (en) | 1989-12-18 |
Family
ID=14606831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11322980A Granted JPS5737362A (en) | 1980-08-18 | 1980-08-18 | Image recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5737362A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59212856A (en) * | 1983-05-18 | 1984-12-01 | Fuji Xerox Co Ltd | Form conveyor belt device |
| JPS60107668A (en) * | 1983-11-17 | 1985-06-13 | Fuji Xerox Co Ltd | Fixing device |
| JPS60159865A (en) * | 1984-01-31 | 1985-08-21 | Matsushita Electric Ind Co Ltd | Preventing device of image blurring |
| JPS6197678A (en) * | 1984-10-18 | 1986-05-16 | Canon Inc | Fixing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52125331A (en) * | 1976-04-13 | 1977-10-21 | Canon Inc | Prevention and device for disorder of unfixed visible image |
| JPS5396838A (en) * | 1977-02-03 | 1978-08-24 | Ricoh Co Ltd | Transfer method in multichromatic electrophotography |
| JPS5465044A (en) * | 1977-11-02 | 1979-05-25 | Hitachi Metals Ltd | Electrophotography device |
| JPH023501A (en) * | 1988-06-22 | 1990-01-09 | Yokohama Rubber Co Ltd:The | Pneumatic tire and forming die therefor |
-
1980
- 1980-08-18 JP JP11322980A patent/JPS5737362A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52125331A (en) * | 1976-04-13 | 1977-10-21 | Canon Inc | Prevention and device for disorder of unfixed visible image |
| JPS5396838A (en) * | 1977-02-03 | 1978-08-24 | Ricoh Co Ltd | Transfer method in multichromatic electrophotography |
| JPS5465044A (en) * | 1977-11-02 | 1979-05-25 | Hitachi Metals Ltd | Electrophotography device |
| JPH023501A (en) * | 1988-06-22 | 1990-01-09 | Yokohama Rubber Co Ltd:The | Pneumatic tire and forming die therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5737362A (en) | 1982-03-01 |
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