JPS63304277A - Electrophotographic developing device - Google Patents
Electrophotographic developing deviceInfo
- Publication number
- JPS63304277A JPS63304277A JP13985387A JP13985387A JPS63304277A JP S63304277 A JPS63304277 A JP S63304277A JP 13985387 A JP13985387 A JP 13985387A JP 13985387 A JP13985387 A JP 13985387A JP S63304277 A JPS63304277 A JP S63304277A
- Authority
- JP
- Japan
- Prior art keywords
- roughness
- toner
- layer thickness
- developing device
- development
- 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.)
- Granted
Links
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 238000012935 Averaging Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 17
- 230000003746 surface roughness Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 39
- 230000000694 effects Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 238000007788 roughening Methods 0.000 description 4
- 238000005488 sandblasting Methods 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000255969 Pieris brassicae Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005685 electric field effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、乾式現像トナーを用いる電子写真現像装置に
係り、特にトナー相持体に担持させたトナーを、層厚規
制部材より層厚規制を行うように構成した電子写真現像
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrophotographic developing device using a dry developing toner. The present invention relates to an electrophotographic developing apparatus configured to perform the above.
「従来の技術」
従来より乾式現像トナーを用いる電子写真現像装置とし
て、トナー担持体上に担持されたトナ一層を潜像保持面
に直接接触させずに、現像位置にバイアス電圧を印加さ
せ、該電圧の電界効果により、前記トナーを選択的に飛
行させる、いわゆる非接触現像法が多く用いられている
。かかる非接触現像法においては、トナ一層厚を潜像保
持面との間の現像間隔以下に設定する必要がある為に、
精度よく且つ薄膜なトナ一層厚に規制する事が必要とさ
れ、このような層厚規制方法として磁性ブレード等をト
ナー担持体に対して非接触位置に設けてトナ一層厚規制
を行なう方法と所定の弾力性を有するトナ一層厚規制部
材をトナー担持体上に軽く接触させ、その接触圧により
均−且つ薄膜なトナ一層の形成を図るものが存在する。``Prior Art'' Conventionally, as an electrophotographic developing device using dry developing toner, a bias voltage is applied to a developing position without bringing a single layer of toner carried on a toner carrier into direct contact with a latent image holding surface. A so-called non-contact development method is often used in which the toner is selectively caused to fly due to the electric field effect of voltage. In such a non-contact development method, it is necessary to set the thickness of the toner layer to be less than the development interval between the toner and the latent image holding surface.
It is necessary to precisely regulate the thickness of a thin toner film, and one method for regulating the thickness of such a layer is to provide a magnetic blade or the like at a non-contact position with respect to the toner carrier to further regulate the toner thickness. There is a device in which a toner layer thickness regulating member having an elasticity of 100% is brought into light contact with a toner carrier, and the contact pressure is used to form a uniform and thin toner layer.
しかしながらかかる装置において、湿度等の外部環境の
影響によりホッパ内に収納したトナーの流動性が低下し
た場合又はトナーが凝集した場合には、前記層厚規制部
材の上流側でトナー溜まり等が形成されてしまい、該ト
ナー溜まり等に起因して層厚規制後のトナ一層にうねり
ゃ白筋等が発生し、良好な現像が困難になるという問題
を有していた。However, in such an apparatus, if the fluidity of the toner stored in the hopper decreases due to the influence of the external environment such as humidity, or if the toner aggregates, a toner pool or the like will be formed upstream of the layer thickness regulating member. If the toner is further undulated after the layer thickness has been regulated due to the toner accumulation, white streaks or the like occur, making it difficult to perform good development.
かかる欠点を解消する為に従来より、前記層厚規制部材
と接触するトナー担持体表面を微小凹凸を有する如く粗
面化する事により、前記層厚規制部材の接触位置におけ
る摩擦力の増大とともに前記トナー溜まりに振動力を付
与し、凝集トナー等の解きほぐしの容易化を図り、これ
により層厚規制後のトナ一層の均一化を可能にした技術
が提案されている。(特願昭54−18453号)そし
てかかるトナー担持体表面を粗面化する方法として、例
えば引き抜きにより形成した円筒管の表面を、不定形粒
子や定形粒子を用いてサンドブラスト処理やビーズブラ
スト処理を行う事により微小凹凸を形成するとともに、
前記ブラストを行う粒子粒度や吹付は圧力等を適宜選択
する事により、円筒状トナー相持体(以下スリーブとい
う)表面の平均粗さやピッチを規制した現像装置が種々
提案されており、その粗面形状の例示を第3図(B)(
C)に示すが、いずれも粒子の衝突という機械的処理に
て粗面化する構成を取る為に、凹凸部50 、EiO高
さ特に各山頂部stp、etp高さがランダムになると
ともに、該山頂部51p、81p形状も極めて先鋭化す
る。In order to eliminate such drawbacks, the surface of the toner carrier that comes into contact with the layer thickness regulating member has been roughened to have minute irregularities, thereby increasing the frictional force at the contact position of the layer thickness regulating member and increasing the frictional force at the contact position of the layer thickness regulating member. A technique has been proposed in which a vibrating force is applied to a toner pool to facilitate loosening of aggregated toner, thereby making it possible to make the toner even more uniform after controlling the layer thickness. (Japanese Patent Application No. 54-18453) As a method for roughening the surface of such a toner carrier, for example, the surface of a cylindrical tube formed by drawing is subjected to sandblasting or bead blasting using irregularly shaped particles or regular shaped particles. By doing this, minute irregularities are formed, and
Various developing devices have been proposed in which the average roughness and pitch of the surface of the cylindrical toner carrier (hereinafter referred to as sleeve) can be controlled by appropriately selecting the particle size and spraying pressure for the above-mentioned blasting. An example of this is shown in Figure 3 (B) (
As shown in C), since the surface is roughened by the mechanical process of collision of particles, the uneven portion 50, the EiO height, especially the height of each peak stp and etp are random, and the height of each peak is random. The shapes of the peaks 51p and 81p also become extremely sharp.
又、トナー担持体に非接触の層厚規制部材を設けてトナ
一層を形成する装置の場合は0.1−、IJL禦という
薄層を得る為に凹凸ピッチ間隔を小にする必要があり、
かかる表面を得るには層厚規制部材の設定条件やトナー
担持体の表面処理を工夫する必要がある。In addition, in the case of an apparatus that forms a single layer of toner by providing a non-contact layer thickness regulating member on the toner carrier, it is necessary to reduce the uneven pitch interval in order to obtain a thin layer of 0.1-IJL thickness.
In order to obtain such a surface, it is necessary to devise the setting conditions of the layer thickness regulating member and the surface treatment of the toner carrier.
一方前記表面形状を有するスリーブにトナ一層厚規制部
材を接触させて層厚規制を行う場合は、該層厚規制部材
の圧接とスリーブの回転により付勢される剪断応力によ
り前記山頂部51p、81pが折損し、該折損した欠落
部がトナ一層内に混入される事により画像形成に悪影響
を及ぼすとともに、前記山頂部51p、61pに印加さ
れる圧接力が大になってスリーブ表面の摩耗が生じ、前
記粗面化の効果が永年に亙って安定して得られないとい
う問題が発生した。On the other hand, when regulating the layer thickness by bringing a toner layer thickness regulating member into contact with the sleeve having the above-mentioned surface shape, shear stress exerted by pressure contact of the layer thickness regulating member and rotation of the sleeve causes the peak portions 51p, 81p. When the sleeve is broken, the broken and missing portion is mixed into the toner layer, which has a negative effect on image formation, and the pressing force applied to the peaks 51p and 61p becomes large, causing wear on the sleeve surface. However, a problem has arisen in that the effect of surface roughening cannot be stably obtained over many years.
かかる欠点を解消する為に、サンドブラスト処理により
粗面化したスリーブ表面にアルマイト処理をして、前記
表面凹凸の硬質化を図るとともに前記アルマイト被覆に
より先鋭化した山頂部に丸味をもたせるようにした技術
が提案されている。In order to eliminate such drawbacks, the sleeve surface roughened by sandblasting is treated with alumite to harden the surface irregularities, and the alumite coating gives the sharpened peaks a rounded appearance. is proposed.
(特開昭58−570!4号)
「発明が解決しようとする問題点」
しかしながら、このように機械処理した凹凸部50 、
80にアルマイトその他の被膜層を形成する方法では、
該被膜層の厚さが薄過ぎると硬質化の効果が円滑に達成
されず、尚山頂部51p、81pの欠落等が生じるとと
もに、又被膜層が厚過ぎると谷底52.82を前記被膜
層が埋めてしまい、表面凹凸を形成した効果が半減して
しまうという問題が生じ、その膜厚調整が非常に面倒で
ある。(Unexamined Japanese Patent Publication No. 58-570!4) "Problems to be Solved by the Invention" However, the irregularities 50 mechanically treated in this way,
In the method of forming an alumite or other coating layer on 80,
If the thickness of the coating layer is too thin, the effect of hardening will not be achieved smoothly, and the top portions 51p and 81p will be missing, and if the coating layer is too thick, the bottoms 52 and 82 will be This causes the problem that the effect of forming surface irregularities is halved, and adjusting the film thickness is extremely troublesome.
又、バイアス電圧によりトナーを潜像保持面側に転移さ
せる構成を採る現像装置においては、絶縁物質であるア
ルマイトがスリーブ表面を被覆させる構成を採ると、前
記トナーの転移が困難になり、形成された画像が薄くな
るという問題が生じる。Furthermore, in a developing device that uses a bias voltage to transfer the toner to the latent image holding surface, if the sleeve surface is coated with alumite, which is an insulating material, it becomes difficult to transfer the toner, and the toner is not formed. A problem arises in that the image becomes faint.
更に前記表面凹凸が硬質化すると、該スリーブ表面に接
触している層厚規制部材側の摩耗が発生し、やはり永年
に亙って安定した層厚規制が不可能になる。Furthermore, when the surface irregularities become hard, wear occurs on the side of the layer thickness regulating member that is in contact with the sleeve surface, making it impossible to stably regulate the layer thickness over a long period of time.
本発明はかかる従来技術に鑑み、層厚規制部材の接触・
非接触に拘らず薄層を形成でき前記表面凹凸山頂部の折
損や欠落を防止しつつ常に均一な圧接力で安定して層厚
規制を行う事が出来、前記粗面化の効果を永年に亙って
安定して得る事の出来る電子写真現像装置を提供する事
を目的とする。In view of such prior art, the present invention provides contact and
A thin layer can be formed regardless of non-contact, and layer thickness can be controlled stably with uniform pressure while preventing breakage or chipping of the tops of the surface irregularities, and the effect of the roughening can be maintained for a long time. It is an object of the present invention to provide an electrophotographic developing device that can be stably obtained over time.
又本発明の他の目的は、スリーブ表面に形成した表面凹
凸部に被膜処理を施す事なく前記効果を達成し得る電子
写真現像装置を提供する事にある。Another object of the present invention is to provide an electrophotographic developing device that can achieve the above effects without applying a film treatment to the uneven surface portion formed on the sleeve surface.
r問題点を解決する為の手段」
本発明は、かかる技術的課題を達成する為に、例えば第
1図に示すように、トナー担持体2表面に接触又は非接
触の状態で対峙させた層厚規制部材3により乾式現像ト
ナーの層厚規制を行う装置において、前記トナー担持体
2表面が、少なくとも後記第1及び第2の粗さ成分を含
む粗面で形成した事を必須構成要件とする。In order to achieve this technical problem, the present invention provides a layer that faces the surface of the toner carrier 2 in contact or non-contact, as shown in FIG. 1, for example. In a device that regulates the layer thickness of dry developing toner using a thickness regulating member 3, it is an essential component that the surface of the toner carrier 2 is formed with a rough surface containing at least the first and second roughness components described below. .
■第1の粗さ成分lOは、層厚規制部材3と接触する山
頂部tip高さをほぼ揃え、微小ピッチ間隔で形成され
、好ましくは該第1の粗さ成分lOが実質的に、前記粗
面全域の粗さ分布を平均して得られる粗さ平均線Xの上
側に位置している点を特徴とする。(2) The first roughness component 10 is formed at minute pitch intervals with the heights of the top tips in contact with the layer thickness regulating member 3 being almost the same, and preferably, the first roughness component 10 is substantially the same as the It is characterized by being located above the roughness average line X obtained by averaging the roughness distribution over the entire rough surface.
尚、該第1の粗さ成分10は後記作用に記すように主と
して層厚規制部材3との原振抵抗の増大を図りつつ圧接
力の均一化を図る事を目的として形成されるものである
からして、ピッチ間隔を微小にして山頂部lipと層厚
規制部材3との接触数を出来るだけ多くする事が好まし
く。The first roughness component 10 is formed mainly for the purpose of increasing the original vibration resistance with the layer thickness regulating member 3 and making the pressure contact force uniform, as described in the function below. Therefore, it is preferable to minimize the pitch interval and increase the number of contacts between the peak lip and the layer thickness regulating member 3 as much as possible.
又該第1の粗さ成分lOの粗さ程度は、永年使用に摩耗
消滅しない程度の深さがあれば足りる。Further, it is sufficient that the first roughness component 1O has a depth that does not wear out during long-term use.
又前記第1の粗さ成分10は層厚規制部材3との摺擦に
よりトナーの解きほぐしゃ転勤させる事を主目的どする
ものであるから、その十点平均粗さが、実質的に現像に
寄与する最小トナー粒径以下、具体的には5 JLm以
下である事が好ましい。Furthermore, since the primary purpose of the first roughness component 10 is to loosen and transfer the toner by rubbing against the layer thickness regulating member 3, its ten-point average roughness is substantially effective for development. It is preferable that the contributing minimum toner particle size be less than or equal to 5 JLm, specifically less than 5 JLm.
■第2の粗さ成分20は、前記第1の粗さ成分10のピ
ッチ間隔より大なるピッチ間隔20piを有し、その谷
部22の平均深さ22bを実質的に現像に寄与するトナ
ーの最小粒径から最大粒径の範囲、具体的には5〜20
IL■に設定し、又好ましくは該第2の粗さ成分20が
実質的に、前記粗面全域の粗さ分布を平均して得られる
粗さ平均線Xの下側に位置している点を特徴とする。(2) The second roughness component 20 has a pitch interval 20pi larger than the pitch interval of the first roughness component 10, and the average depth 22b of the valley portion 22 is substantially the same as that of the toner contributing to development. The range from the minimum particle size to the maximum particle size, specifically 5 to 20
IL■, and preferably the second roughness component 20 is located substantially below the roughness average line X obtained by averaging the roughness distribution over the entire rough surface. It is characterized by
尚、該第2の粗さ成分20は、一般に前記谷部22にト
ナー粒子を喰い込ませながら搬送力を高める為に用いら
れるものであるから、そのピッチ間隔20p iは、5
0〜500 JL■程度の粗いピッチ間隔20piでよ
い。The second roughness component 20 is generally used to increase the conveying force while biting the toner particles into the troughs 22, so the pitch interval 20p i is 5.
A rough pitch interval of 20 pi of about 0 to 500 JL■ may be sufficient.
「作用」
かかる技術手段によれば、前記各組さ成分が個別に夫々
別異な作用を生じせしめる事により後記する本発明の作
用を円滑に達成する。"Action" According to this technical means, the effects of the present invention described later can be smoothly achieved by causing each of the assembled components to individually produce different effects.
即ち第1の粗さ成分10は、(トナー担持体表面に層厚
規制部材3が接触する構成を採る装置の場合)該層厚規
制部材3と接触する山頂部ttp高さをほぼ揃え且つ微
小ピッチ間隔で形成されている為に、層厚規制部材3の
接触面に多数(少なくとも2以上)の山頂部ttpが接
触する事となり均一な圧接力が得られる為に、摩擦力の
安定化と周期的な微小振動が得られ、これにより流動性
の悪いトナーや凝集したトナーの解きはぐしか容易に行
われる。In other words, the first roughness component 10 is such that (in the case of an apparatus adopting a configuration in which the layer thickness regulating member 3 contacts the surface of the toner carrier), the heights of the peaks ttp in contact with the layer thickness regulating member 3 are almost the same and are very small. Because they are formed at pitch intervals, a large number (at least two or more) of the peaks ttp come into contact with the contact surface of the layer thickness regulating member 3, and a uniform pressure contact force is obtained, which stabilizes the frictional force. Periodic minute vibrations are obtained, which facilitates loosening of toner with poor fluidity or agglomerated toner.
而も前記粗さ成分は微小ピッチ間隔で且つ山頂部11P
高さをほぼ揃えている為に、層厚規制部材3の摺擦によ
っても山頂部lipに働く剪断応力が大幅に低減し、山
頂部lipの折損が防止される。Moreover, the roughness component is at minute pitch intervals and at the peak portion 11P.
Since the heights are almost the same, the shear stress acting on the peak lip is greatly reduced by the sliding of the layer thickness regulating member 3, and breakage of the peak lip is prevented.
又第2の粗さ成分20は、前記第1の粗さ成分lOのピ
ッチ間隔20piより大なるピッチ間隔20piで、そ
の谷部22の平均深さ22bを実質的に現像に寄与する
トナーの最小粒径から最大粒径の範囲に設定した為に、
言い変えればトナーが前記谷部22内に完全に陥没する
事なく食わえ込む形で保持する事が出来る為に、前記第
1の粗さ成分の山頂部11.p上で、層厚規制部材3と
の接触圧により層厚規制されたトナーがスリップした場
合においても前記第2の粗さ成分20の谷部22で該ス
リップしたトナーをしっかりと保持し、確実に搬送させ
る事が可能となる。Further, the second roughness component 20 has a pitch interval of 20 pi which is larger than the pitch interval of 20 pi of the first roughness component IO, and the average depth 22b of the valley portion 22 is the minimum of the toner that substantially contributes to development. Because it was set in the range from the particle size to the maximum particle size,
In other words, since the toner can be held in the valley portion 22 without completely sinking into the valley portion 22, the peak portion 11 of the first roughness component. Even if the toner whose layer thickness is regulated slips due to the contact pressure with the layer thickness regulating member 3 on the surface of the trough 20, the troughs 22 of the second roughness component 20 will firmly hold the slipped toner and reliably It becomes possible to transport the
従って本発明によれば前記夫々の粗さ成分の作用により
、トナーを精度よく且つ安定して層厚規制させる事が出
来るとともに、現像位置までの搬送も確実に行う事が可
能となる。Therefore, according to the present invention, by the action of each of the roughness components, it is possible to precisely and stably regulate the layer thickness of the toner, and it is also possible to reliably transport the toner to the development position.
而も前記複数の粗さ成分は、後記するようにブラスト処
理等の機械的処理にて表面凹凸を形成した後、該機械的
処理にて形成された先鋭化した山頂部lipを、酸処理
又はアルカリ処理にて溶解−平滑化する事により容易に
形成出来る為に、アルマイト処理より数段製造及び取扱
いが楽である。The plurality of roughness components can be obtained by forming surface irregularities through mechanical treatment such as blasting, as described later, and then by acid treatment or Since it can be easily formed by dissolving and smoothing with alkali treatment, it is several steps easier to manufacture and handle than alumite treatment.
尚、本発明は層厚規制部材をトナー担持体に非接触とす
る構成を採る装置の場合であって前記とほぼ同様な作用
を得る事が出来、本発明はかかる装置においても当然に
適用し得る。Incidentally, the present invention relates to an apparatus in which the layer thickness regulating member is not in contact with the toner carrier, and substantially the same effect as described above can be obtained, and the present invention is naturally applicable to such an apparatus. obtain.
「実施例」
以下、図面を参照して本発明の好適な実施例を例示的に
詳しく説明する。ただしこの実施例に記載されている構
成部品の寸法、材質、形状、その相対配置などは特に特
定的な記載がない限りは、この発明の範囲をそれのみに
限定する趣旨ではなく、単なる説明例に過ぎない。"Embodiments" Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, and relative arrangements of the components described in this example are not intended to limit the scope of this invention, but are merely illustrative examples. It's nothing more than that.
第2図は本発明の実施例に係る電子写真現像装置の概略
構成を示す。FIG. 2 shows a schematic configuration of an electrophotographic developing apparatus according to an embodiment of the present invention.
1は表面に光導電層が形成された感光体ドラムで、回転
方向に沿って図示しない画像形成用の電子写真用周辺装
置が配置されている。Reference numeral 1 denotes a photosensitive drum having a photoconductive layer formed on its surface, and an electrophotographic peripheral device (not shown) for image formation is arranged along the rotation direction.
2は固定磁石集成体5が内包された非磁性スリーブで、
その外周面が後記するように第1の粗さ成分10と第2
の粗さ成分20を有する如く粗面化されている。2 is a non-magnetic sleeve containing a fixed magnet assembly 5;
As will be described later, the outer peripheral surface has a first roughness component 10 and a second roughness component 10.
The surface is roughened to have a roughness component 20 of .
そして該スリーブ2が矢印方向に所定の周速で回転する
事により、トナー容器B内の相互摩擦により負極性に帯
電された高抵抗磁性トナーをその周面上に担持させなが
ら、現像位置まで搬送させ、所定の現像を行う事が出来
る。By rotating the sleeve 2 at a predetermined circumferential speed in the direction of the arrow, the high-resistance magnetic toner negatively charged due to mutual friction inside the toner container B is supported on its circumferential surface and transported to the development position. It is possible to perform predetermined development.
又スリーブ2には直流パルス発生回路7が接続され、感
光体ドラム1との間の現像領域にスイッチング直流バイ
アスを印加する事により、該電界効果によりスリーブ2
に担持しているトナーを感光体ドラム1の潜像保持面に
選択的に飛行させて現像を行う、尚、本実施例において
はポリエチレン、磁性粉、荷電制御剤及びシリカ等が所
定重量部配合して形成された磁性トナーで、その平均粒
径10ル農、トナー粒径範囲を5〜20ト1のものを用
いた。Further, a DC pulse generation circuit 7 is connected to the sleeve 2, and by applying a switching DC bias to the developing area between the sleeve 2 and the photoreceptor drum 1, the sleeve 2 is
Development is carried out by selectively flying the toner supported on the latent image holding surface of the photoreceptor drum 1. In this embodiment, polyethylene, magnetic powder, charge control agent, silica, etc. are mixed in a predetermined weight part. A magnetic toner formed by using a magnetic toner having an average particle size of 10 μm and a toner particle size range of 5 to 20 μm was used.
3は現像位置上流側のトナー容器B出口側に配設された
トナ一層厚規制部材3で、金属系薄板弾性部材で形成さ
れ、その自由端側を所定の曲率で折曲し、該折曲3a部
をスリーブ2周面に所定の押圧力で接触させるとともに
、一方基端側は所定の侵入角度でトナー容器B側に延設
し、トナー容器8出口部に形成された支持部材8外壁面
に固設させる。Reference numeral 3 denotes a toner thickness regulating member 3 disposed on the outlet side of the toner container B on the upstream side of the development position, which is made of a metal thin plate elastic member, and whose free end side is bent at a predetermined curvature. 3a is brought into contact with the circumferential surface of the sleeve 2 with a predetermined pressing force, while the proximal end side is extended toward the toner container B side at a predetermined penetration angle, and the outer wall surface of the support member 8 formed at the outlet portion of the toner container 8 be fixed to.
次に前記スリーブ2の表面形状について製造順序に従っ
て説明する。Next, the surface shape of the sleeve 2 will be explained according to the manufacturing order.
先ず引き抜きにより所定直径に形成し、第3図(C)の
ような表面粗さを有するアルミ製円筒管の表面を、粒度
#100の不定形粒子を用いてサンドブラスト処理をし
て、第3図CB)に示すような粗面を形成した後、12
〜13%のカセイソーダアルカリ溶液中に0.5分〜3
分間浸漬してしてアルカリ処理した後、水洗い洗浄して
第3図(A)に示すような粗面を形成した。First, the surface of an aluminum cylindrical tube is formed into a predetermined diameter by drawing and has a surface roughness as shown in FIG. After forming a rough surface as shown in CB), 12
~0.5 min ~3 in ~13% caustic soda alkaline solution
After being immersed for a minute and treated with alkali, it was washed with water to form a rough surface as shown in FIG. 3(A).
尚、前記サンドブラスト処理はサンドペーパ処理やビー
ズブラスト処理、又前記アルカリ処理は、希硫酸、希塩
酸その他の酸、又はカセイソーダ以外の他アルカリを用
いて処理しても同様な効果を得る事が出来る。The same effect can be obtained by using sandpaper treatment or bead blasting for the sandblasting treatment, or by using dilute sulfuric acid, dilute hydrochloric acid, other acids, or an alkali other than caustic soda for the alkali treatment.
かかる粗面は形状を詳細に測定してみるに、前記粗面全
域の粗さ分布を平均して得られる粗さ平均線の上側には
第1の粗さ成分10が、又下側に前記第2の粗さ成分2
0が夫々実質的に存在するとともに、第1の粗さ成分1
0の平均ピッチと分布は1.8±1.8 (2σ)ル
■、又十点平均粗さは2.8ル1といずれも実質的に現
像に寄与するトナー最小粒径(51L■)以下である。When the shape of such a rough surface is measured in detail, it is found that the first roughness component 10 is above the roughness average line obtained by averaging the roughness distribution over the entire rough surface, and the first roughness component 10 is below the roughness average line. Second roughness component 2
0 are substantially present and the first roughness component 1
The average pitch and distribution of 0 is 1.8±1.8 (2σ) 1, and the 10-point average roughness is 2.8 1, both of which are the minimum toner particle diameter (51L) that substantially contributes to development. It is as follows.
又第2の粗さ成分の平均ピッチと分布は380±210
(2σ)終l、又谷部22の平均深さ22bと分布
は、11.1±E1.O(2σ)IL腸とトナー粒径範
囲5〜20終層内にある。Also, the average pitch and distribution of the second roughness component is 380±210
(2σ) end l, and the average depth 22b and distribution of the valley portion 22 are 11.1±E1. O(2σ)IL is within the end layer and toner particle size range 5-20.
かかる実施例について効果を確認する為に、前記サンド
ブラスト処理を行った第3図CB)に示すスリーブ2
(比較例1)、ビーズブラスト処理を行った第3図(C
)に示すスリーブ2 (比較例2)、と第3図(A)に
示 す本発明の実施例に係るスリーブ2 (実施例)を
夫々用いて実際の現像を行った所、比較例1では白地部
の多い原稿を1000枚連続してコピーした所、画像濃
度が1.1から0.9に低下した。そして更に続けて2
000枚コピーした所、白地部にかぶりが生じた。これ
は前記表面凹凸の摩耗とともに、凸部山頂部ttpにト
ナーが一部融着したものと思われる。In order to confirm the effect of this example, the sleeve 2 shown in FIG. 3 CB) was subjected to the sandblasting process.
(Comparative Example 1), Figure 3 (C
), and the sleeve 2 (Example) according to the embodiment of the present invention shown in FIG. 3(A) were used for actual development. When 1000 sheets of an original with many blank areas were continuously copied, the image density decreased from 1.1 to 0.9. And then continue 2
After 000 copies were made, fogging appeared on the white background. This is thought to be due to the abrasion of the surface irregularities as well as toner being partially fused to the peaks ttp of the convex portions.
比較例2ではほとんどベタ黒の原稿を続けて2000枚
コピーした所、画像に白筋が発生した。これは前記山頂
部upが折損し、該折損した欠落部がトナ一層内に混入
される事に起因するものと思われる。In Comparative Example 2, when 2000 sheets of an almost solid black original were continuously copied, white streaks appeared in the images. This seems to be due to the fact that the peak portion UP is broken and the broken and missing portion is mixed into the toner layer.
次に本発明の実施例を白地部の多い原稿を10000枚
、次にほとんどベタ黒の原稿を続けて10000枚夫々
連続してコピーした所、いずれも良好な画像が得られた
。Next, in the example of the present invention, 10,000 sheets of an original with a large white area were copied, and then 10,000 sheets of an original with almost solid black were successively copied, and good images were obtained in both cases.
「発明の効果」
以上記載した如く本発明によれば、第1及び第2の粗さ
成分の組み合わせからなる粗面を有するトナー担持体2
を用いて現像装置を構成する事により、前記表面凹凸山
頂部の折損や欠落を防止しつつ常に均−且つ安定して層
厚規制を行う事が出来、前記粗面化の効果を永年に亙っ
て安定して得る事の出来る。"Effects of the Invention" As described above, according to the present invention, the toner carrier 2 has a rough surface made of a combination of the first and second roughness components.
By configuring the developing device using this, it is possible to always regulate the layer thickness evenly and stably while preventing breakage or chipping of the tops of the surface irregularities, and the effect of the surface roughening can be maintained for many years. You can get it stably.
又本発明によれば、簡単な製造工程で前記トナー担持体
が形成し得るとともに、表面にアルマイト等の絶縁被膜
を施す事がない為に、バイアス電圧によりトナーを潜像
保持面側に転移させる構成を取る現像装置にも適用出来
、汎用性が高い。Further, according to the present invention, the toner carrier can be formed through a simple manufacturing process, and since there is no need to apply an insulating coating such as alumite to the surface, the toner is transferred to the latent image holding surface using a bias voltage. It can also be applied to developing devices with different configurations, and is highly versatile.
等の種々の著効を有す。It has various effects such as
第1図は本発明の基本構成図、第2図は本発明の実施例
に係る電子写真現像装置の概略構成図。
第3図(A) (B) (C)は第2図に示す実施例と
、従来技術の夫々に使用されるトナー担持体の表面粗さ
′s1 図
第3図
(A)
ス
2oρ1
第2!l
第3図
(C)
(B)FIG. 1 is a basic configuration diagram of the present invention, and FIG. 2 is a schematic configuration diagram of an electrophotographic developing apparatus according to an embodiment of the present invention. 3(A), 3(B), and 3(C) show the surface roughness of the toner carrier used in the embodiment shown in FIG. 2 and the prior art, respectively. ! l Figure 3 (C) (B)
Claims (1)
より層厚規制した後、現像位置側に搬送させて所定の電
子写真現像を行う現像装置において、前記トナー担持体
表面が少なくとも、山頂部高さをほぼ揃え微小ピッチ間
隔で形成される第1の粗さ成分と、該第1の粗さ成分の
ピッチ間隔より大なるピッチ間隔を有しその谷部の平均
深さを実質的に現像に寄与するトナーの最小粒径から最
大粒径の範囲に設定した第2の粗さ成分とを含む粗面で
ある事を特徴とする電子写真現像装置 2)前記第1の粗さ成分の十点平均粗さが、実質的に現
像に寄与するトナー最小粒径以下である特許請求の範囲
第1項記載の電子写真現像装置 3)前記粗面全域の粗さ分布を平均して得られる粗さ平
均線の上側に前記第1の粗さ成分が、又下側に前記第2
の粗さ成分が、夫々実質的に位置している事を特徴とす
る特許請求の範囲第1項記載の電子写真現像装置[Scope of Claims] 1) In a developing device that performs predetermined electrophotographic development by regulating the layer thickness of the toner carried on a toner carrier by a layer thickness regulating member, the toner is conveyed to a development position side, and the toner carrying member is The body surface has at least a first roughness component formed at minute pitch intervals with the heights of the peaks substantially aligned, and a pitch interval larger than the pitch interval of the first roughness component, and an average of the valleys thereof. 2) An electrophotographic developing device characterized by having a rough surface including a second roughness component whose depth is set in a range from the minimum particle size to the maximum particle size of the toner that substantially contributes to development. 3) Roughness distribution over the entire rough surface of the electrophotographic developing device according to claim 1, wherein the ten-point average roughness of the roughness component 1 is less than or equal to the minimum toner particle size that substantially contributes to development. The first roughness component is above the roughness average line obtained by averaging, and the second roughness component is below the roughness average line.
The electrophotographic developing device according to claim 1, wherein the roughness components are substantially located respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62139853A JP2601275B2 (en) | 1987-06-05 | 1987-06-05 | Electrophotographic developing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62139853A JP2601275B2 (en) | 1987-06-05 | 1987-06-05 | Electrophotographic developing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63304277A true JPS63304277A (en) | 1988-12-12 |
JP2601275B2 JP2601275B2 (en) | 1997-04-16 |
Family
ID=15255059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62139853A Expired - Lifetime JP2601275B2 (en) | 1987-06-05 | 1987-06-05 | Electrophotographic developing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2601275B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0336563A (en) * | 1989-07-03 | 1991-02-18 | Canon Inc | Developing device |
JPH0336564A (en) * | 1989-07-03 | 1991-02-18 | Canon Inc | Developing device |
JPH0336562A (en) * | 1989-07-03 | 1991-02-18 | Canon Inc | Developing device |
JP2008299015A (en) * | 2007-05-30 | 2008-12-11 | Seiko Epson Corp | Developing device, toner bearing member, image forming apparatus and image forming system |
US8086150B2 (en) | 2005-11-02 | 2011-12-27 | Seiko Epson Corporation | Toner particle-bearing roller with projection portion, developing device having such toner particle-bearing roller, and image forming apparatus having such developing device |
US8086152B2 (en) | 2007-05-30 | 2011-12-27 | Seiko Epson Corporation | Developing device, image forming apparatus, image forming system, developing method, and toner bearing member |
US8192339B2 (en) | 2006-11-07 | 2012-06-05 | Seiko Epson Corporation | Developing roller, manufacturing method thereof, developing apparatus and image forming apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59189374A (en) * | 1983-04-12 | 1984-10-26 | Canon Inc | Developing method |
-
1987
- 1987-06-05 JP JP62139853A patent/JP2601275B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59189374A (en) * | 1983-04-12 | 1984-10-26 | Canon Inc | Developing method |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0336563A (en) * | 1989-07-03 | 1991-02-18 | Canon Inc | Developing device |
JPH0336564A (en) * | 1989-07-03 | 1991-02-18 | Canon Inc | Developing device |
JPH0336562A (en) * | 1989-07-03 | 1991-02-18 | Canon Inc | Developing device |
US8086150B2 (en) | 2005-11-02 | 2011-12-27 | Seiko Epson Corporation | Toner particle-bearing roller with projection portion, developing device having such toner particle-bearing roller, and image forming apparatus having such developing device |
US8401443B2 (en) | 2005-11-02 | 2013-03-19 | Seiko Epson Corporation | Toner-particle bearing roller, developing device, and image forming apparatus |
US8192339B2 (en) | 2006-11-07 | 2012-06-05 | Seiko Epson Corporation | Developing roller, manufacturing method thereof, developing apparatus and image forming apparatus |
JP2008299015A (en) * | 2007-05-30 | 2008-12-11 | Seiko Epson Corp | Developing device, toner bearing member, image forming apparatus and image forming system |
US8086152B2 (en) | 2007-05-30 | 2011-12-27 | Seiko Epson Corporation | Developing device, image forming apparatus, image forming system, developing method, and toner bearing member |
Also Published As
Publication number | Publication date |
---|---|
JP2601275B2 (en) | 1997-04-16 |
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