JPH05188752A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH05188752A JPH05188752A JP4002260A JP226092A JPH05188752A JP H05188752 A JPH05188752 A JP H05188752A JP 4002260 A JP4002260 A JP 4002260A JP 226092 A JP226092 A JP 226092A JP H05188752 A JPH05188752 A JP H05188752A
- Authority
- JP
- Japan
- Prior art keywords
- developing sleeve
- sleeve
- developing
- longitudinal direction
- driving 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.)
- Withdrawn
Links
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 11
- 239000000057 synthetic resin Substances 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 abstract description 13
- 238000003825 pressing Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 2
- 230000000284 resting effect Effects 0.000 abstract 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 241000519995 Stachys sylvatica Species 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- 229920000299 Nylon 12 Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 101150000971 SUS3 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 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
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電子写真方式の複写機、
プリンタ等において使用される現像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic copying machine,
The present invention relates to a developing device used in a printer or the like.
【０００２】[0002]
【従来の技術】プリンタ、複写機等で使用される現像装
置は種々のタイプのものが知られているが、その中の１
つに、図３に原理を示すものがある。この現像装置は、
駆動ローラＤに、その外径より若干内径の大きい現像ス
リーブＳを外嵌し、該スリーブＳの例えば両端部を片側
から押圧部材ＧにてローラＤへ押圧し、反対側にできた
たるみ部分Ｓ１を静電潜像担持体ＰＣ表面へ当接させる
タイプの現像装置である。2. Description of the Related Art Various types of developing devices used in printers, copying machines, etc. are known.
One is that the principle is shown in FIG. This developing device
A developing sleeve S having an inner diameter slightly larger than the outer diameter thereof is externally fitted to the drive roller D, and, for example, both ends of the sleeve S are pressed from one side to the roller D by pressing members G, and a slack portion S1 formed on the opposite side. Is a developing device of the type in which the electrostatic latent image carrier PC is brought into contact with the surface of the electrostatic latent image carrier PC.
【０００３】この種の現像装置における現像スリーブ
は、一般に、金属、例えばニッケルで作られているが、
金属製現像スリーブの製造は電鋳法等によらなければな
らず、製作が面倒で高価につくこと、端部割れが発生し
易いこと、物に当てたときに傷つき易いこと、プリン
タ、複写機等のチャージャから出るオゾン等の影響を受
け易いこと等のために、金属に替えて合成樹脂製とする
ことが提案されている。The developing sleeve in this type of developing device is generally made of a metal such as nickel.
The metal developing sleeve must be manufactured by an electroforming method, etc., and it is cumbersome and expensive to manufacture, easily cracked at the edges, easily scratched when hitting an object, a printer, a copying machine. It is proposed to use synthetic resin instead of metal because it is easily affected by ozone emitted from the charger.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、合成樹
脂製の現像スリーブは、金属製の現像スリーブと異な
り、前述のようにその両端部を押圧部材Ｇにて駆動ロー
ラＤへ押圧しても、剛性が低いので、スリーブ中心軸線
方向にわたって一様なたるみ部分を形成し難い。すなわ
ち、押圧部材Ｇの押圧によるその反対側のたるみ変形
が、押圧部材から離れた部分、特に押圧部材と押圧部材
の中間に相当する部分にまで十分および難い。However, unlike the developing sleeve made of metal, the developing sleeve made of synthetic resin is rigid even if both ends thereof are pressed against the driving roller D by the pressing members G as described above. Is low, it is difficult to form a uniform slack portion in the sleeve central axis direction. That is, it is difficult for the sagging deformation on the opposite side due to the pressing of the pressing member G to sufficiently reach the portion away from the pressing member, particularly the portion corresponding to the middle of the pressing member and the pressing member.
【０００５】このような現像スリーブを画像形成装置に
おける静電潜像の現像に供すると、現像スリーブＳと静
電潜像担持体ＰＣとの接触不良Ａによる、いわゆる画像
の白抜け、中抜けが発生する。また、合成樹脂製スリー
ブは、そのたるみ部分Ｓ１が静電潜像担持体に接触する
ことで変形するが、長時間、特に高温高湿環境下に放置
すると、樹脂製であるがために残留変形（クリープ変
形）が発生し、これも、画像の白抜けや白筋発生等の原
因となる。When such a developing sleeve is used for developing an electrostatic latent image in an image forming apparatus, so-called white spots and hollow spots in an image are caused by poor contact A between the developing sleeve S and the electrostatic latent image carrier PC. Occur. Further, the synthetic resin sleeve is deformed when its slack portion S1 comes into contact with the electrostatic latent image bearing member, but when it is left for a long time, especially in a high temperature and high humidity environment, it is made of resin and therefore remains deformed. (Creep deformation) occurs, which also causes white spots and white streaks in the image.
【０００６】そこで本発明は、駆動ローラにその外径よ
り若干内径の大きい合成樹脂製現像スリーブを外嵌し、
該現像スリーブ片側から該駆動ローラに押圧し、反対側
にできたたるみ部分を静電潜像担持体へ接触させるよう
にした現像装置であって、現像スリーブをその長手方向
にわたり一様に静電潜像担持体に安定接触させることが
でき、通常運転は勿論のこと、高温高湿環境下での長期
放置後の運転においても、白抜け、中抜け等の画像欠損
や画像むらのない良好な画像が得られる現像装置を提供
することを課題とする。Therefore, in the present invention, a synthetic resin developing sleeve having an inner diameter slightly larger than the outer diameter of the driving roller is fitted onto the driving roller,
A developing device in which one side of the developing sleeve is pressed against the driving roller, and a slack portion formed on the opposite side is brought into contact with the electrostatic latent image carrier, and the developing sleeve is electrostatically charged uniformly in its longitudinal direction. The latent image bearing member can be stably contacted, and it is possible to obtain a good image defect such as white spots and hollow spots and image unevenness not only in normal operation but also in operation after being left for a long time in a high temperature and high humidity environment. An object is to provide a developing device that can obtain an image.
【０００７】[0007]
【課題を解決するための手段】さて、前記課題を解決す
るためには現像ニップ部において現像スリーブたるみを
スリーブ長手方向にわたり均等に作る必要があり、この
ためには、現像スリーブの長手方向の弾性率を上げるこ
とができればよい（ちなみに、Ｎｉスリーブの弾性率は
約１５０００ｋｇ／ｍｍ2 、樹脂スリーブ（ナイロン１
２）の弾性率は約２００ｋｇ／ｍｍ2 である。）。In order to solve the above-mentioned problems, it is necessary to make the developing sleeve slack uniform in the developing nip portion in the longitudinal direction of the sleeve. For this purpose, elasticity of the developing sleeve in the longitudinal direction is required. It would be good if the modulus could be increased (By the way, the elastic modulus of the Ni sleeve is about 15000 kg / mm 2 , and the resin sleeve (nylon 1
The elastic modulus of 2) is about 200 kg / mm 2 . ).
【０００８】元来、合成樹脂の機械特性の強化には炭酸
カルシウム、ガラス繊維、ウィスカ等のフィラーで補強
する方法が良く採られている。しかし、ガラス繊維等の
短繊維で補強すると、フィラーの配向性が良くないため
異方性の材料は得にくく、どの方向にも同等に補強して
しまう。前記現像装置では、安定した広い現像ニップ部
をやさしく静電潜像担持体に当てる必要があるので、現
像スリーブに対して法線方向ではその柔らかさを保持し
ておきたい。Originally, a method of reinforcing a synthetic resin with a filler such as calcium carbonate, glass fiber, and whisker is often adopted to strengthen the mechanical properties of the synthetic resin. However, when reinforced with short fibers such as glass fibers, it is difficult to obtain an anisotropic material because the orientation of the filler is not good, and reinforced evenly in any direction. In the developing device, it is necessary to gently contact the electrostatic latent image bearing member with a stable and wide developing nip portion, and therefore it is desirable to keep the softness in the direction normal to the developing sleeve.
【０００９】そこで、本発明では現像スリーブの長手方
向の剛性を補強し、現像スリーブに対し法線方向にはフ
レキシブル性を持たせて、安定した広い現像ニップを
得、画像の中抜け、白抜けを防止することにした。すな
わち本発明は、駆動ローラにその外径より若干内径の大
きい合成樹脂製現像スリーブを外嵌し、該現像スリーブ
を片側から該駆動ローラに押圧し、反対側にできたたる
み部分を静電潜像担持体へ接触させるようにした現像装
置において、前記現像スリーブが、その長手方向の両端
間にわたって連続するように配向された補強用充填長繊
維を含むことを特徴とする現像装置を提供するものであ
る。Therefore, in the present invention, the rigidity of the developing sleeve in the longitudinal direction is reinforced, and the developing sleeve is made flexible in the direction of the normal line to obtain a stable and wide developing nip, and a hollow image or a blank image is generated. Decided to prevent. That is, according to the present invention, a synthetic resin developing sleeve having an inner diameter slightly larger than the outer diameter of the driving roller is fitted onto the driving roller, the developing sleeve is pressed against the driving roller from one side, and the slack portion formed on the opposite side is electrostatically latent. A developing device in which the developing sleeve is brought into contact with an image bearing member, wherein the developing sleeve includes reinforcing filling filaments oriented so as to be continuous between both ends in a longitudinal direction thereof. Is.
【００１０】前記補強用充填長繊維としては種々のもの
が考えられるが、具体例として、前記樹脂スリーブの製
作において、三菱化成株式会社製の炭素繊維（長繊維）
配向樹脂複合材料（プリプレグ）を用いることが考えら
れる。プリプレグはエポキシ樹脂等をバインダとし、炭
素繊維を配向させて硬化してシートとしたもので、繊維
の配向方向には極めて良好な力学補強性を示すが、これ
に対して垂直な方向ではバインダ樹脂に近い値を示す。
従って、このシートをチューブ状に成形し、現像スリー
ブの長手方向に炭素繊維を配向させたものを現像スリー
ブとして使用することが考えられる。Although various kinds of reinforcing long filaments can be considered, as a specific example, in the production of the resin sleeve, carbon fibers (long filaments) manufactured by Mitsubishi Kasei Co., Ltd.
It is conceivable to use an oriented resin composite material (prepreg). A prepreg uses epoxy resin as a binder and orients and hardens carbon fibers to form a sheet. It exhibits extremely good mechanical reinforcement in the fiber orientation direction, but in the direction perpendicular to this it is a binder resin. Indicates a value close to.
Therefore, it is conceivable that this sheet is formed into a tube shape, and carbon fibers are oriented in the longitudinal direction of the developing sleeve to be used as the developing sleeve.
【００１１】[0011]
【作用】本発明現像装置によると、現像スリーブは合成
樹脂製ではあるが、それには、スリーブ長手方向の両端
間にわたって連続するように配向された補強用充填長繊
維を含めてあるので、スリーブ長手方向の剛性が補強さ
れており、従って、現像スリーブのたるみ部分は、スリ
ーブ長手方向にわたり一様に静電潜像担持体に接触す
る。According to the developing device of the present invention, although the developing sleeve is made of synthetic resin, it contains the reinforcing filling filaments oriented so as to be continuous between both ends in the longitudinal direction of the sleeve. The directional rigidity is reinforced, so that the slack portion of the developing sleeve contacts the electrostatic latent image carrier uniformly over the sleeve longitudinal direction.
【００１２】一方、スリーブに対し法線方向には柔軟性
が保たれ、所望の安定した広い現像ニップが得られる。
かくして画像欠損の無い良好な現像が行われる。On the other hand, the flexibility is maintained in the direction normal to the sleeve, and a desired stable and wide developing nip can be obtained.
Thus, good development can be performed without image loss.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図１は、本発明の一実施例である現像装置の全体
の断面図を示す。また、図２は現像スリーブを示してい
る。但し、図２ではスリーブの厚みを誇張して示してい
る。この現像装置１０は、一成分現像剤であるトナー１
を収容するトナー収容槽１１を備え、その槽内には図示
しない駆動手段により図上時計方向に回転駆動される第
１攪拌部材１２及び反時計方向に駆動される第２攪拌部
材１４を備えている。トナー収容槽１１の開口部にはエ
ンドレスのチューブ形状をした現像スリーブ（トナー担
持体）１３が配置されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an entire developing device which is an embodiment of the present invention. Further, FIG. 2 shows a developing sleeve. However, in FIG. 2, the thickness of the sleeve is exaggerated. The developing device 10 includes a toner 1 which is a one-component developer.
And a second stirring member 14 driven counterclockwise in the drawing by a driving means (not shown). There is. An endless tube-shaped developing sleeve (toner carrier) 13 is arranged at the opening of the toner storage tank 11.
【００１４】その現像スリーブ１３内には、内径がこれ
より若干小さめの発泡シリコンゴム、ＥＰＤＭ、アルミ
ローラなどで作製した駆動ローラ１５を配置してある。
この駆動ローラは図示しない駆動手段により図中反時計
方向に回転駆動される。現像スリーブ１３は、両端部が
押圧ガイド部材１７により駆動ローラ１５に圧接され、
それよって外側に向けたたるみ部分１３０が形成されて
おり、このたるみ部分が画像形成装置の静電潜像担持体
（代表的には感光体ドラム）ＰＣに接触するようになっ
ている。Inside the developing sleeve 13, a driving roller 15 made of foamed silicone rubber, EPDM, aluminum roller or the like having an inner diameter slightly smaller than that is arranged.
This drive roller is rotationally driven in the counterclockwise direction in the figure by a drive means (not shown). Both ends of the developing sleeve 13 are pressed against the driving roller 15 by the pressing guide members 17,
As a result, a slack portion 130 that is directed outward is formed, and this slack portion comes into contact with the electrostatic latent image carrier (typically a photoconductor drum) PC of the image forming apparatus.
【００１５】また、形状、設定位置、共に図示のものに
限るものではないが、トナー収容槽１１には上端がこれ
に片持ち支持され、下端が現像スリーブ１３に対し反対
方向に若干折り曲げられている規制部材１６が配置さ
れ、現像スリーブ１３に約３．５ｇ／ｍｍの力で圧接し
ている。この規制部材１６は、トナー収容槽１１から第
１攪拌部材１２、第２攪拌部材１４により攪拌、供給さ
れたトナー１を摩擦帯電させ、一定のトナー層厚を現像
スリーブ１３の表面に形成する。Although the shape and the setting position are not limited to those shown in the drawing, the upper end of the toner storage tank 11 is cantilevered by this, and the lower end is slightly bent in the opposite direction to the developing sleeve 13. The regulating member 16 is arranged and is in pressure contact with the developing sleeve 13 with a force of about 3.5 g / mm. The regulating member 16 frictionally charges the toner 1 agitated and supplied by the first agitating member 12 and the second agitating member 14 from the toner storage tank 11 to form a constant toner layer thickness on the surface of the developing sleeve 13.
【００１６】本実施例では規制部材１６としてＳＵＳ３
０１鋼板からなるステンレス製の板材を使用したが、材
質としてはこれに限るものではなく、リン青銅板、ゴ
ム、樹脂等多彩な材料が使用可能である。トナー１は負
帯電性のトナー、具体的にはビスフェノールＡ型ポリエ
ステル樹脂（ＡＶ：１９、ＯＨＶ：２３、軟化点１２３
℃、Ｔｇ：６５℃）１００重量部と、カーボンブラック
ＭＡ＃８（三菱化成工業株式会社製）５重量部と、ボン
トロンＳ−３４（オリエント化学工業株式会社製）３重
量部と、ビスコールＴＳ−２００（三洋化成工業株式会
社製）２．５重量部からなる組成物を、それ自体知られ
た方法によって混練、粉砕、分級し、粒径が７〜１３μ
ｍの範囲に８０重量％分布した、平均粒径１０μｍであ
るトナー粒子を製造し、このトナー粒子に流動化剤とし
て疏水性シリカ（タルコ社製、タラノックス５００）を
０．５重量％添加し、ホモジナンザーにより回転数２０
００ｒｐｍで１分間混合、攪拌したものである。In this embodiment, the regulating member 16 is made of SUS3.
Although a stainless steel plate made of 01 steel plate was used, the material is not limited to this, and various materials such as phosphor bronze plate, rubber, and resin can be used. Toner 1 is a negatively chargeable toner, specifically, bisphenol A type polyester resin (AV: 19, OHV: 23, softening point 123).
C, Tg: 65 ° C.) 100 parts by weight, carbon black MA # 8 (manufactured by Mitsubishi Kasei Co., Ltd.) 5 parts by weight, Bontron S-34 (manufactured by Orient Chemical Industry Co., Ltd.) 3 parts by weight, and Viscole TS- A composition consisting of 2.5 parts by weight of 200 (manufactured by Sanyo Chemical Industry Co., Ltd.) was kneaded, pulverized and classified by a method known per se to give a particle size of 7 to 13 μm.
Toner particles having an average particle diameter of 10 μm distributed in a range of 80% by weight in the range of m are produced, and 0.5% by weight of hydrophobic silica (Talanox 500 manufactured by Tarco Co., Ltd.) is added to the toner particles as a fluidizing agent. Rotation speed 20 by homogenizer
The mixture was mixed and stirred at 00 rpm for 1 minute.
【００１７】現像スリーブ１３は、図２に示すように、
エポキシ樹脂１３ａをバインダとし、炭素繊維（長繊
維）１３ｂを一方向に配向させて硬化してシートとした
炭素繊維（長繊維）配向樹脂複合材料、具体的にはＵＤ
テーププリプレグｈｙ−ＥR １０７１４ＡＣ（三菱化成
株式会社製、繊維配合率３０％）をチューブ状に成形
し、スリーブの長手方向に繊維１３ｂが一端から他端ま
でにわたって連続配向した構成のものである。ここで、
バインダはエポキシ樹脂に限るものではなく、その用途
に応じた例えば荷電性や耐環境性などを考慮して、ポリ
エステル、フェノール、ポリイミド、ビスマレイド等の
熱硬化性樹脂や、ＰＥＥＫ等の熱可塑性樹脂まで多種類
のものが使用可能である。また、配合繊維の材質におい
ても炭素繊維に限るものではなく、高強度を有し補強性
のあるものであれば使用可能である。この繊維の充填量
を調節することで、補強、異方性を調節することがで
き、弾性率の調節も可能である。The developing sleeve 13 is, as shown in FIG.
A carbon fiber (long fiber) oriented resin composite material, specifically, a UD, in which the epoxy resin 13a is used as a binder and the carbon fiber (long fiber) 13b is oriented in one direction and cured to form a sheet.
Tape prepreg hy-E R 10714AC (manufactured by Mitsubishi Kasei Corporation, fiber blending ratio 30%) was formed into a tubular, those fibers 13b are configured as continuous oriented across from one end to the other in the longitudinal direction of the sleeve. here,
The binder is not limited to the epoxy resin, and in consideration of the chargeability and the environment resistance depending on the application, thermosetting resins such as polyester, phenol, polyimide, bismaleide and thermoplastic resins such as PEEK can be used. Many types can be used. Further, the material of the blended fiber is not limited to carbon fiber, and any material having high strength and reinforcing property can be used. By adjusting the filling amount of this fiber, reinforcement and anisotropy can be adjusted, and elastic modulus can also be adjusted.
【００１８】成形された現像スリーブ１３は、膜厚約１
６０μｍであり、引っ張り弾性率約１２３００ｋｇ／ｍ
ｍ2 （繊維方向）であった。本実施例においては炭素繊
維配合率を３０％、膜厚１６０μｍとしたが、この値は
かなり自由に設定でき、これにより機械的特性、特に異
方性の調整も可能である。さらに詳言すると、本実施例
における現像スリーブ１３は、サンドブラスト処理によ
り外周面の表面粗さＲｚを約５μｍ程度に調整してあ
る。また、現像スリーブ１３の表面硬度は、ＪＩＳ
Ｋ．５４００で規定されている鉛筆ひっかき試験による
と、９Ｈである。The molded developing sleeve 13 has a film thickness of about 1
60 μm, tensile elastic modulus of about 12300 kg / m
It was m 2 (fiber direction). In this embodiment, the carbon fiber blending ratio was 30% and the film thickness was 160 μm. However, this value can be set quite freely, and mechanical properties, particularly anisotropy, can be adjusted. More specifically, the surface roughness Rz of the outer peripheral surface of the developing sleeve 13 in this embodiment is adjusted to about 5 μm by sandblasting. The surface hardness of the developing sleeve 13 is JIS
K. According to the pencil scratch test defined by 5400, it is 9H.
【００１９】この現像スリーブ１３は、駆動ローラ１５
が回されることで、これに従動回転する。このような現
像装置をシステム速度３５ｍｍ／ｓｅｃの小型のレーザ
ビームプリンタに装着し、現像スリーブ１３が感光体Ｐ
Ｃと接触する現像領域にて、感光体上の静電潜像に現像
スリーブ１３の表面に存在するトナー１を付着させ、そ
の潜像を顕像化した。かくして得られた感光体のトナー
像は、図示しない転写紙供給手段から搬送されている転
写用紙上に転写され、図示しない定着装置により定着さ
れた後、画像として排出される。The developing sleeve 13 has a driving roller 15
When is rotated, it is driven to rotate. Such a developing device is attached to a small laser beam printer having a system speed of 35 mm / sec, and the developing sleeve 13 is attached to the photoconductor P.
In the developing area in contact with C, the toner 1 existing on the surface of the developing sleeve 13 was made to adhere to the electrostatic latent image on the photoconductor to visualize the latent image. The toner image on the photoconductor thus obtained is transferred onto a transfer sheet conveyed from a transfer sheet supply unit (not shown), fixed by a fixing device (not shown), and then discharged as an image.
【００２０】本発明の現像スリーブ構成で印字を行った
場合、良好な画像が得られ、中抜け、白抜けといった画
像欠損は見られなかった。また、高温高湿環境下におけ
る現像スリーブのクリープ変形もなく、これによる画像
欠損も確認されなかった。 （比較例１）前記実施例の現像スリーブのかわりに、カ
ーボンブラックとナイロン１２のみを用いてチューブを
作製し、現像スリーブ１３とした以外は前記実施例と同
様の装置構成、ならびに実験、評価を行った。このとき
製作された現像スリーブは厚さが約１５９μｍ、外径約
２５ｍｍ、引っ張り弾性率約２００ｋｇ／ｍｍ2 、外周
面の表面粗さＲｚが約５μｍ程度で、表面硬度はＢであ
った。When printing was carried out with the developing sleeve construction of the present invention, good images were obtained, and no image defects such as hollow areas and white areas were observed. Further, there was no creep deformation of the developing sleeve under a high temperature and high humidity environment, and no image defect due to this was confirmed. (Comparative Example 1) Instead of the developing sleeve of the above-mentioned embodiment, a tube was made using only carbon black and nylon 12, and the developing sleeve 13 was used. went. The developing sleeve manufactured at this time had a thickness of about 159 μm, an outer diameter of about 25 mm, a tensile elastic modulus of about 200 kg / mm 2 , a surface roughness Rz of the outer peripheral surface of about 5 μm, and a surface hardness of B.
【００２１】このような現像スリーブを使用した場合、
冒頭でも述べたように中央部のたるみが現像方向ではな
く他方に逃げてしまい、現像ニップでの感光体ＰＣとの
安定した接触ができなくなり画像欠損が起こった。この
ため、感光体ＰＣと駆動ローラ１５の距離をせばめ、中
央部でも感光体ＰＣに接触するように設定した場合、初
期的に画像欠損はなくなったが、高温高湿環境下で約１
００時間放置した後はクリープ変形が発生し、これによ
る画像欠損が生じた。 （比較例２）前記実施例の現像スリーブのかわりに、カ
ーボンブラックとナイロン１２、そして、補強材として
炭素繊維の短繊維を４０％配合したものを用いてチュー
ブを作製し、現像スリーブ１３とした以外は前記実施例
と同様の装置構成、ならびに実験、評価を行った。この
とき製作された現像スリーブは厚さが約１６０μｍ、外
径約２５ｍｍ、引っ張り弾性率約８２０ｋｇ／ｍｍ2 、
外周面の表面粗さＲｚが約５μｍ程度で、表面硬度は５
Ｈであった。When such a developing sleeve is used,
As described at the beginning, the slack in the central portion escapes to the other side instead of the developing direction, and stable contact with the photoconductor PC at the developing nip cannot be performed, resulting in image loss. Therefore, when the distance between the photoconductor PC and the driving roller 15 is narrowed and the center of the drive roller 15 is set to be in contact with the photoconductor PC, the image loss is eliminated at first, but it is about 1 in a high temperature and high humidity environment.
After leaving it for 00 hours, creep deformation occurred, resulting in image loss. (Comparative Example 2) Instead of the developing sleeve of the above-mentioned embodiment, a tube was prepared by using carbon black and nylon 12, and 40% of short fiber of carbon fiber was added as a reinforcing material, to obtain a developing sleeve 13. Except for the above, the same apparatus configuration, experiment, and evaluation as those of the above-described examples were performed. The developing sleeve manufactured at this time has a thickness of about 160 μm, an outer diameter of about 25 mm, a tensile elastic modulus of about 820 kg / mm 2 ,
The outer peripheral surface has a surface roughness Rz of about 5 μm and a surface hardness of 5
It was H.
【００２２】このような現像スリーブを使用した場合、
安定して広い現像ニップが取れないために良好な画像は
得られなかった。When such a developing sleeve is used,
A good image could not be obtained because a stable and wide developing nip could not be removed.
【００２３】[0023]
【発明の効果】以上説明したように本発明によると、駆
動ローラにその外径より若干内径の大きい合成樹脂製現
像スリーブを外嵌し、該現像スリーブを片側から該駆動
ローラに押圧し、反対側にできたたるみ部分を静電潜像
担持体へ接触させるようにした現像装置であって、現像
スリーブをその長手方向にわたり一様に静電潜像担持体
に安定接触させることができ、通常運転は勿論のこと、
高温高湿環境下での長期放置後の運転においても、白抜
け、中抜け等の画像欠損や画像むらのない良好な画像が
得られる現像装置を提供することができる。As described above, according to the present invention, a synthetic resin developing sleeve having an inner diameter slightly larger than the outer diameter of the driving roller is fitted onto the driving roller, and the developing sleeve is pressed against the driving roller from one side. A developing device in which the slack portion formed on the side is brought into contact with the electrostatic latent image bearing member, and the developing sleeve can be brought into stable contact with the electrostatic latent image bearing member uniformly over the longitudinal direction thereof. Not to mention driving
It is possible to provide a developing device capable of obtaining a good image without image defects such as white spots and hollow spots and image unevenness even after operation for a long time in a high temperature and high humidity environment.
【図１】本発明の一実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】（Ａ）図は図１の装置における現像スリーブの
斜視図、（Ｂ）図はその断面図である。2A is a perspective view of a developing sleeve in the apparatus of FIG. 1, and FIG. 2B is a sectional view thereof.
【図３】従来例の説明図である。FIG. 3 is an explanatory diagram of a conventional example.
１０ 現像装置 １ トナー １３ 現像スリーブ １３０ スリーブ１３のたるみ部分 １３ａ バインダ １３ｂ 長繊維 １５ 駆動ローラ 10 developing device 1 toner 13 developing sleeve 130 slack portion of sleeve 13 a binder 13b long fiber 15 driving roller
Claims (1)
きい合成樹脂製現像スリーブを外嵌し、該現像スリーブ
を片側から該駆動ローラに押圧し、反対側にできたたる
み部分を静電潜像担持体へ接触させるようにした現像装
置において、前記現像スリーブが、その長手方向の両端
間にわたって連続するように配向された補強用充填長繊
維を含むことを特徴とする現像装置。1. A synthetic resin developing sleeve having an inner diameter slightly larger than the outer diameter of the driving roller is externally fitted, the developing sleeve is pressed from one side to the driving roller, and a slack portion formed on the opposite side is electrostatically latent. A developing device adapted to be brought into contact with an image bearing member, wherein the developing sleeve includes reinforcing long filaments oriented so as to be continuous between both ends in a longitudinal direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4002260A JPH05188752A (en) | 1992-01-09 | 1992-01-09 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4002260A JPH05188752A (en) | 1992-01-09 | 1992-01-09 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05188752A true JPH05188752A (en) | 1993-07-30 |
Family
ID=11524398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4002260A Withdrawn JPH05188752A (en) | 1992-01-09 | 1992-01-09 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05188752A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5715501A (en) * | 1994-04-15 | 1998-02-03 | Canon Kabushiki Kaisha | Image forming method using a surface with a specified water contact angle and process cartridge using such a method |
| US5731122A (en) * | 1994-11-08 | 1998-03-24 | Canon Kabushiki Kaisha | Image forming method and image forming apparatus |
| US5976755A (en) * | 1997-04-30 | 1999-11-02 | Canon Kabushiki Kaisha | Image forming method featuring a residual charge control property resulting from a selected toner formulation |
| US6775487B2 (en) * | 2000-06-05 | 2004-08-10 | Canon Kabushiki Kaisha | Image forming apparatus, unit detachably attachable to image forming apparatus and developer remaining amount displaying system |
-
1992
- 1992-01-09 JP JP4002260A patent/JPH05188752A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5715501A (en) * | 1994-04-15 | 1998-02-03 | Canon Kabushiki Kaisha | Image forming method using a surface with a specified water contact angle and process cartridge using such a method |
| US5731122A (en) * | 1994-11-08 | 1998-03-24 | Canon Kabushiki Kaisha | Image forming method and image forming apparatus |
| US5976755A (en) * | 1997-04-30 | 1999-11-02 | Canon Kabushiki Kaisha | Image forming method featuring a residual charge control property resulting from a selected toner formulation |
| US6775487B2 (en) * | 2000-06-05 | 2004-08-10 | Canon Kabushiki Kaisha | Image forming apparatus, unit detachably attachable to image forming apparatus and developer remaining amount displaying system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6163669A (en) | Image forming apparatus | |
| US5713067A (en) | Charging member, process cartridge using the same and electrophotographic apparatus | |
| JP2009204666A (en) | Development device and image forming apparatus | |
| US6390961B1 (en) | Semiconductive silicone rubber roller | |
| US5206691A (en) | Developing apparatus | |
| JPH05188752A (en) | Developing device | |
| JP2005266500A (en) | Developing roller, process cartridge and electrophotographic apparatus | |
| JP2949900B2 (en) | Developing device | |
| JP5178073B2 (en) | Charging member and charging device | |
| JP4952327B2 (en) | Method for producing electrophotographic developing roller | |
| JPS62192775A (en) | Toner layer forming device | |
| KR20170024879A (en) | Roller for image forming apparatus | |
| JP2979808B2 (en) | Developing device and developer carrier | |
| JP2004191637A (en) | Toner carrier and image forming apparatus | |
| JPH05100558A (en) | Developing device | |
| JP2995819B2 (en) | Developing device | |
| JP2003015401A (en) | Developing roller | |
| JP2004333638A (en) | Toner carrier and method for manufacturing the same | |
| JP2004219704A (en) | Toner carrier and development apparatus | |
| JP2007163786A (en) | Conductive roller, manufacturing method therefor, electrophotographic process cartridge, and image forming apparatus | |
| JP2001034063A (en) | Developing device | |
| JPH05188764A (en) | Developing device | |
| JP2000162865A (en) | Developing equipment | |
| JP5320707B2 (en) | Development device | |
| JPH04347881A (en) | Developing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |