JPH0527581A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH0527581A JPH0527581A JP3179580A JP17958091A JPH0527581A JP H0527581 A JPH0527581 A JP H0527581A JP 3179580 A JP3179580 A JP 3179580A JP 17958091 A JP17958091 A JP 17958091A JP H0527581 A JPH0527581 A JP H0527581A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing sleeve
- hard
- developing device
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真式画像形成装
置に供される像担持体上の潜像の現像に適用される現像
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device applied to the development of a latent image on an image carrier used in an electrophotographic image forming apparatus.
【０００２】[0002]
【従来の技術】感光体などの像担持体上に形成された潜
像を、１成分または２成分現像剤を用いて接触または非
接触現像方式の現像を行なう電子写真式画像形成装置に
おいては、良好な画像を得るために、現像剤担持体であ
る現像スリーブ（以後現像スリーブという）上の現像剤
の層厚は薄く、しかも均一にすることが必要である。図
７に示す様に現像スリーブは感光体である像担持体１に
若干の隙間を設けて対峙している。そして図７の
（ａ），（ｂ），（ｃ）に示す様に、現像スリーブに層
厚の規制を行なう現像剤量規制体である薄層形成体（以
後薄層形成体という）を押圧している。2. Description of the Related Art In an electrophotographic image forming apparatus for developing a latent image formed on an image bearing member such as a photosensitive member by a contact or non-contact developing method using a one-component or two-component developer, In order to obtain a good image, it is necessary that the layer thickness of the developer on the developing sleeve (hereinafter referred to as the developing sleeve), which is the developer carrier, be thin and uniform. As shown in FIG. 7, the developing sleeve faces the image carrier 1, which is a photoconductor, with a slight gap. Then, as shown in FIGS. 7A, 7B, and 7C, a thin layer forming body (hereinafter referred to as a thin layer forming body), which is a developer amount regulating body for regulating the layer thickness on the developing sleeve, is pressed. is doing.
【０００３】図７（ａ）は、磁性材より成る薄層形成体
31を現像スリーブ２内に設けた磁石体の磁力により現像
スリーブ２に押圧する方式のものを示している。FIG. 7A shows a thin layer forming body made of a magnetic material.
In the figure, a method of pressing 31 against the developing sleeve 2 by the magnetic force of a magnet body provided in the developing sleeve 2 is shown.
【０００４】図７（ｂ）は、上記図７（ａ）の方式に更
に弾性部材４の押圧力が薄層形成体31に加わる方式のも
のである。FIG. 7B shows a system in which the pressing force of the elastic member 4 is applied to the thin layer forming body 31 in addition to the system of FIG. 7A.
【０００５】図７（ｃ）は、薄層形成体31がゴム板又は
金属ばね板で出来ており、その弾性により現像スリーブ
２に押圧する方式のものである。FIG. 7C shows a system in which the thin layer forming body 31 is made of a rubber plate or a metal spring plate and is pressed against the developing sleeve 2 by its elasticity.
【０００６】このように薄層形成体を現像スリーブに押
圧するため、現像スリーブの表面は薄層形成体と摩擦し
て両者に摩粍が生じることになる。Since the thin layer forming body is pressed against the developing sleeve in this way, the surface of the developing sleeve rubs against the thin layer forming body, and the two are abraded.
【０００７】また、現像スリーブ２の表面は現像剤の搬
送性である担持性を向上するため、不定形ブラスト処理
の例えばサンドブラスト処理により表面に細かい凹凸を
作ってある。サンドブラスト処理は周知の様に不定形の
砂の粒子を高速で吹き付けて金属表面に細かい凹凸を作
るものである。現像スリーブは通常アルミニウム合金と
か真鍮といった非磁性の比較的に柔らかい金属材料で出
来ている。従って、サンドブラスト処理をした現像スリ
ーブ２の表面はこれを拡大して見ると図８に示す様に荒
れて、毛羽立った状態となっている。The surface of the developing sleeve 2 is formed with fine irregularities by an irregular blasting process such as a sand blasting process in order to improve the carrying property of the developer, which is a carrying property. As is well known, the sandblast treatment is to spray irregularly shaped sand particles at high speed to make fine irregularities on the metal surface. The developing sleeve is usually made of a non-magnetic, relatively soft metallic material such as aluminum alloy or brass. Therefore, the surface of the developing sleeve 2 that has been sandblasted is rough and fluffy as shown in FIG.
【０００８】この様にサンドブラスト処理をした現像ス
リーブの表面は荒れて毛羽立った表面状態となるため現
像剤の搬送性は向上することとなったが、一方では後述
の様な問題点が出ることとなったため球形ブラスト処理
が考えられる様になった。Since the surface of the developing sleeve thus sandblasted is rough and has a fluffy surface state, the transportability of the developer is improved, but on the other hand, the following problems occur. As a result, spherical blasting has come to be considered.
【０００９】この球形ブラスト処理は不定形の砂の粒子
の代わりに小さいスチルボール又はガラスの玉を使った
処理である。この処理による現像スリーブ２の表面は、
これを拡大して見ると図９に示す様に表面は凹凸が出来
ているとはいうもののサンドブラスト処理の表面に比べ
るとずっと滑らかである。しかも小さいスチルボール又
はガラスの玉を高速で現像スリーブの表面に衝突させる
ため、尖った角のある不定形の砂の粒子を衝突させるサ
ンドブラストに比べて現像スリーブ表面を加工硬化させ
る効果が大きい。This spherical blasting process is a process using small still balls or glass beads instead of irregularly shaped sand particles. The surface of the developing sleeve 2 by this treatment is
When this is magnified and seen, the surface is uneven as shown in FIG. 9, but it is much smoother than the sandblasted surface. Moreover, since a small still ball or glass ball is made to collide with the surface of the developing sleeve at a high speed, the effect of work-hardening the surface of the developing sleeve is greater than that of sandblasting in which irregular-shaped sand particles having sharp edges are collided.
【００１０】そしてこのサンドブラスト処理をした現像
スリーブと、球形ブラスト処理をした現像スリーブの、
現像剤搬送量の現像スリーブ使用時間に対する変化の状
況を示したのが図10に示すグラフである。このグラフに
おいてＢはサンドブラスト処理の場合で、Ａが球形ブラ
スト処理の場合を示している。Then, the development sleeve subjected to the sand blast treatment and the development sleeve subjected to the spherical blast treatment,
The graph shown in FIG. 10 shows how the developer transport amount changes with the use time of the developing sleeve. In this graph, B shows the case of sandblasting, and A shows the case of spherical blasting.
【００１１】このグラフからも容易に判る様に不定形粒
子によるサンドブラスト処理の場合は、最初は現像剤の
搬送量は多いが使用時間の経過と共に現像剤の搬送量が
急速に減少していくことを示している。As can be easily seen from this graph, in the case of sandblasting with irregular particles, the amount of developer conveyed is large at first, but the amount of developer conveyed decreases rapidly with the lapse of use time. Is shown.
【００１２】一方球形ブラスト処理の場合は、最初から
現像剤の搬送量は多くないが使用時間が経過しても現像
剤の搬送量はあまり変化していないことを示している。On the other hand, in the case of the spherical blast treatment, it is shown that the developer carrying amount is not large from the beginning, but the developer carrying amount does not change much even after the use time elapses.
【００１３】また現像スリーブは前述の様に通常アルミ
ニウム合金とか真鍮といった非磁性の比較的に柔らかい
金属材料で出来ている。従ってその表面は耐食性の向上
とか表面硬度を上げるためにアルミ合金の場合は例えば
硬質アルマイト処理、真鍮の場合は例えば硬質ニッケル
・クロームメッキ処理等の表面処理が行なわれている。The developing sleeve is usually made of a non-magnetic and relatively soft metallic material such as aluminum alloy or brass as described above. Therefore, in order to improve the corrosion resistance and the surface hardness, the surface is subjected to a surface treatment such as a hard alumite treatment in the case of an aluminum alloy and a hard nickel / chrome plating treatment in the case of a brass.
【００１４】[0014]
【発明が解決しようとする課題】上で述べた様にサンド
ブラスト処理をした現像スリーブの表面は、図８に示す
様に荒れて毛羽立った表面状態となっておりこの表面に
薄層形成体を押圧することになるため、現像スリーブの
表面は急速に摩粍することになる。現像スリーブ表面の
サンドブラスト処理は、本来現像剤の搬送性を向上する
ために行なった処理である。そのため現像スリーブが新
しい時と少し使用した時の現像剤の搬送量の変化は大き
く、前述の様に図10Ｂの曲線で示す様な状況となってい
る。この現像剤の搬送量の変化は、搬送量が多い時は現
像スリーブ表面の現像剤層の層厚が厚くなるため当然の
ことながら画像濃度が大となり画質も悪くなる。また、
現像剤の搬送量が少なくなれば現像スリーブ表面の現像
剤層の層厚が薄くなるため画質は向上する方向であるが
画像濃度が小となって表れることになる。The surface of the developing sleeve which has been sandblasted as described above has a rough and fluffy surface state as shown in FIG. 8, and the thin layer forming body is pressed against this surface. As a result, the surface of the developing sleeve is rapidly abraded. The sandblast treatment on the surface of the developing sleeve is originally performed to improve the transportability of the developer. Therefore, the change in the amount of developer conveyed is large when the developing sleeve is new and when it is used a little, and as described above, the situation is as shown by the curve in FIG. 10B. This change in the transport amount of the developer naturally results in a high image density and poor image quality because the developer layer on the surface of the developing sleeve becomes thick when the transport amount is large. Also,
When the transport amount of the developer is small, the layer thickness of the developer layer on the surface of the developing sleeve becomes thin, so that the image quality tends to be improved, but the image density becomes small.
【００１５】また、薄層形成体の現像スリーブへの押圧
力を弱くして、摩粍を少なくしようとすると経時変化は
小さくすることが出来る。しかし、薄層形成体の現像ス
リーブへの押圧力が弱くなるため、現像スリーブの現像
剤層が厚くまた現像剤層の厚みが不安定で不均一になる
ため画質の劣化が起こることになる。Further, if the pressing force of the thin layer forming body against the developing sleeve is weakened to reduce abrasion, the change with time can be reduced. However, since the pressing force of the thin layer forming body against the developing sleeve becomes weaker, the developer layer of the developing sleeve becomes thicker and the thickness of the developer layer becomes unstable and non-uniform, resulting in deterioration of image quality.
【００１６】本発明は上記問題点を解決するためになさ
れたものである。すなわち、現像スリーブの現像剤の搬
送性を安定化して耐久性を持たせ、画像濃度の経時変化
を小さくし、また現像スリーブの現像剤の層厚を薄く
し、且つ安定して薄く保持出来るようにして高画質の画
像が得られる様にした現像装置を提供することを目的と
したものである。The present invention has been made to solve the above problems. That is, the developer transportability of the developing sleeve is stabilized to provide durability, the temporal change of the image density is reduced, the developer layer thickness of the developing sleeve is made thin, and it can be stably kept thin. It is an object of the present invention to provide a developing device capable of obtaining a high quality image.
【００１７】[0017]
【課題を解決するための手段】上記目的は、像担持体上
に形成された潜像を現像するための、表面上に現像剤を
担持する剛性を有する現像剤担持体と、該現像剤担持体
に押圧し、該現像剤担持体に担持された前記現像剤の量
を規制する現像剤量規制体を配設した現像装置におい
て、前記現像剤担持体の表面は球形ブラスト処理を行な
った後に硬質表面処理層で覆った事を特徴とする現像装
置によって達成される。SUMMARY OF THE INVENTION The above object is to provide a developer carrier having rigidity for carrying a developer on the surface thereof for developing a latent image formed on the image carrier, and the developer carrier. In a developing device provided with a developer amount regulating body that presses against the body and regulates the amount of the developer carried on the developer carrying body, after the surface of the developer carrying body is subjected to spherical blast treatment, It is achieved by a developing device characterized by being covered with a hard surface treatment layer.
【００１８】また、上記目的は、前記現像剤担持体の表
面を球形ブラスト処理を行なった後に硬質表面処理層で
覆い、更に球形ブラスト処理を行なった事を特徴とする
現像装置。Further, the above-mentioned object is a developing apparatus characterized in that the surface of the developer carrying member is spherically blasted, then covered with a hard surface treatment layer, and further spherically blasted.
【００１９】また、前記現像剤担持体の表面を不定形ブ
ラスト処理を行なった後に硬質表面処理層で覆い、更に
球形ブラスト処理を行なった事を特徴とする現像装置。Further, the developing device is characterized in that the surface of the developer carrying member is subjected to an amorphous blast treatment, then covered with a hard surface treatment layer, and further subjected to a spherical blast treatment.
【００２０】また、前記現像剤担持体の表面を硬質表面
処理層で覆った後に球形ブラスト処理を行なった事を特
徴とする現像装置によって達成される。Further, it is achieved by a developing device characterized in that the surface of the developer carrying member is covered with a hard surface treatment layer and then spherical blast treatment is carried out.
【００２１】また上記目的は、前記硬質表面処理層の硬
度は前記現像剤担持体の表面硬度より高い処理層である
事を特徴とする現像装置によって達成される。The above object is also achieved by a developing device characterized in that the hardness of the hard surface treatment layer is higher than the surface hardness of the developer carrying member.
【００２２】さらに上記目的は、前記現像剤量規制体は
磁性体であり、前記現像剤担持体へ磁力により押圧する
ことを特徴とする現像装置によって達成されるものであ
る。Further, the above object is achieved by a developing device characterized in that the developer amount regulating body is a magnetic body and is pressed against the developer carrying body by a magnetic force.
【００２３】[0023]
【実施例】以下、この発明の実施例を添付図面によって
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００２４】図５は一成分現像剤を用いる現像装置の断
面図である。FIG. 5 is a sectional view of a developing device using a one-component developer.
【００２５】現像装置50のハウジング51の内部には、現
像剤担持体である現像スリーブ２とマグネットローラ5
3、現像トナー凝固防止用の振動板54、トナー残量検知
手段55等が配設されている。上記現像スリーブ２は、図
示反時計方向に駆動回転する非磁性円筒体で、その内部
に回動しないように固設したマグネットローラ53を有
し、該現像スリーブ２の長手方向表面の一部はハウジン
グ51の開口部から露出し、像担持体１と平行状態で近接
して配設されている。Inside the housing 51 of the developing device 50, the developing sleeve 2 as a developer carrying member and the magnet roller 5 are provided.
3, a vibrating plate 54 for preventing development toner coagulation, a toner remaining amount detecting means 55, and the like are provided. The developing sleeve 2 is a non-magnetic cylindrical body that is driven and rotated counterclockwise in the drawing, and has a magnet roller 53 fixed therein so as not to rotate, and a part of the longitudinal surface of the developing sleeve 2 is It is exposed from the opening of the housing 51, and is arranged in parallel with and in close proximity to the image carrier 1.
【００２６】また、前記ハウジング51の上部開口を閉蓋
する蓋部材58の上部には、トナー補給容器56が着脱自在
に装着される。A toner replenishing container 56 is removably attached to the upper portion of the lid member 58 that closes the upper opening of the housing 51.
【００２７】上記蓋部材58の内側凹部には、現像剤の層
厚を規制する剛性かつ磁性を有する例えばステンレス鋼
棒等の薄層形成体31と、該薄層形成体31を保持するホル
ダー61と、前記薄層形成体31を押圧する弾性部材４等か
ら成る現像剤量規制手段が設けてある。In the inner concave portion of the lid member 58, a thin layer forming body 31 such as a stainless steel rod having rigidity and magnetism that regulates the layer thickness of the developer, and a holder 61 holding the thin layer forming body 31. And a developer amount regulating means including an elastic member 4 and the like for pressing the thin layer forming body 31.
【００２８】前記現像スリーブ２と像担持体（感光体ド
ラム）１との間隙は、現像スリーブ２の軸端部に同軸に
設けられコロ（図示せず）が、像担持体１周面の両端付
近の画像形成領域外に当接することによって、常に一定
間隙に保持されている。The gap between the developing sleeve 2 and the image bearing member (photosensitive drum) 1 is provided coaxially with the axial end of the developing sleeve 2 and rollers (not shown) are provided at both ends of the peripheral surface of the image bearing member 1. By abutting the outside of the image forming area in the vicinity, it is always held at a constant gap.
【００２９】ここで、59は前記画像担持体１と現像スリ
ーブ２との間隙部に形成される現像領域、65は直流電圧
と交流電圧とを重畳した交流バイアス電源である。Here, 59 is a developing region formed in the gap between the image carrier 1 and the developing sleeve 2, and 65 is an AC bias power source in which a DC voltage and an AC voltage are superposed.
【００３０】トナー補給容器56より補給された新規トナ
ーは、ハウジング51内に収容され、振動板54の振動によ
り攪拌され、更に、図示反時計方向に駆動回転する現像
スリーブ２の周面上に層状に付着して搬送され、前記薄
層形成体31の押圧位置を通過して所定の薄層が形成され
る。The new toner replenished from the toner replenishing container 56 is contained in the housing 51, is agitated by the vibration of the vibrating plate 54, and is layered on the peripheral surface of the developing sleeve 2 which is driven and rotated counterclockwise in the drawing. The thin layer forming body 31 passes through the pressing position of the thin layer forming body 31 to form a predetermined thin layer.
【００３１】図６は現像剤量規制手段の縦断面図であ
る。前記蓋部材58の溝部51Ａの内壁の一部には、弾性部
材４が複数箇所貼り付けられている。該弾性部材４と前
記溝部51Ａで形成される凹部に、前記薄層形成体31が落
し込まれる。そして、該薄層形成体31の両端部のセンタ
穴60Ａに、ホルダー61の突起部61Ａの先端部が遊嵌，挿
入される。FIG. 6 is a vertical sectional view of the developer amount regulating means. A plurality of elastic members 4 are attached to a part of the inner wall of the groove 51A of the lid member 58. The thin layer forming body 31 is dropped into the concave portion formed by the elastic member 4 and the groove portion 51A. Then, the tip portions of the protrusions 61A of the holder 61 are loosely fitted and inserted into the center holes 60A at both ends of the thin layer forming body 31.
【００３２】該ホルダー61は蓋部材58の両側面に小ねじ
により固定されている。このようにして、薄層形成体31
はホルダー61から脱落したり外れたりすることがなくな
る。勿論、前記突起部61Ａとセンター穴60Ａの嵌合状態
はゆるくし、外れない程度の余裕を持たせてある。The holder 61 is fixed to both side surfaces of the lid member 58 with machine screws. In this way, the thin layer forming body 31
Does not fall off or come off the holder 61. Of course, the fitting state of the projection 61A and the center hole 60A is loose so that there is a margin such that it does not come off.
【００３３】前記磁性を有する薄層形成体31は、対向す
るマグネットローラ53の磁性と逆の磁性を有し、その吸
引磁力と、前記弾性部材４による弾力との協働によって
現像スリーブ２への押圧力が得られるようにしてある。
そして現像スリーブ２上に運ばれてくる現像剤Ｄは、前
記磁性薄層形成体31と弾性部材４との押圧力に打ちかっ
て薄層形成体31を持ち上げ、その圧接位置にできた隙間
を通過することによって、均一な現像剤層設定厚さが得
られるようにしてある。そして像担持体１と現像スリー
ブ２との間の現像領域の設定隙間と対応し、最適な現像
が行なえるようにしてある。The magnetic thin layer forming body 31 has a magnetism opposite to the magnetism of the magnet roller 53 which faces it, and the attraction force of the magnetism and the elastic force of the elastic member 4 cooperate to the developing sleeve 2. The pressing force is obtained.
The developer D carried on the developing sleeve 2 lifts the thin layer forming body 31 against the pressing force of the magnetic thin layer forming body 31 and the elastic member 4, and passes through the gap formed at the pressure contact position. By doing so, a uniform developer layer set thickness can be obtained. Then, in correspondence with the set gap in the developing area between the image carrier 1 and the developing sleeve 2, optimum developing can be performed.
【００３４】その後、現像が終わって現像スリーブ２上
の余った現像剤Ｄは、現像装置50のハウジング51内に戻
されて、再び現像スリーブ２上に散布され、連続的に現
像が行われる。After the development is completed, the residual developer D on the developing sleeve 2 is returned to the housing 51 of the developing device 50 and is sprayed again on the developing sleeve 2 to continuously develop.
【００３５】次に図１から図４の図面により本発明の核
心の説明を行なう。Next, the core of the present invention will be described with reference to FIGS. 1 to 4.
【００３６】まず図１は第一の実施例として、現像スリ
ーブ２の表面を球形ブラスト処理を行なった後に硬質表
面処理層21で覆った状態の拡大図を示している。この様
な処理を行なうと現像スリーブ２の表面はまずサンドブ
ラスト処理の表面に比べると滑らかな硬質の凹凸の面で
覆われる。すなわち現像スリーブ２の表面は球形ブラス
ト処理のため加工硬化が生じてその表面は細かい凹凸の
硬質の面で覆われることになる。そして次にその表面を
材料がアルミ合金の場合は、硬質表面処理層である例え
ば硬質アルマイト処理層や、また材料が真鍮の場合は例
えば硬質ニッケルクロームメッキ層で覆われることにな
る。First, FIG. 1 shows, as a first embodiment, an enlarged view of a state in which the surface of the developing sleeve 2 is spherically blasted and then covered with a hard surface treatment layer 21. When such a treatment is performed, the surface of the developing sleeve 2 is first covered with a surface having a hard and uneven surface which is smoother than the surface of the sandblast treatment. That is, since the surface of the developing sleeve 2 is spherically blasted, work hardening occurs and the surface is covered with a hard surface having fine irregularities. Then, when the material is an aluminum alloy, the surface is covered with a hard surface-treated layer, for example, a hard alumite treatment layer, and when the material is brass, for example, a hard nickel chrome plating layer.
【００３７】図２は第二の実施例として、図１の硬質表
面処理層21の上を更に球形ブラスト処理を行なった状態
の拡大図を示している。即ち、硬質表面処理層21の上を
更に球形ブラスト処理を行なうことによって、硬質表面
処理層21の表面が更に凹凸の面に加工され、更に加工硬
化された硬い表面で覆われることになる。FIG. 2 shows, as a second embodiment, an enlarged view of a state where the hard surface treatment layer 21 of FIG. 1 is further subjected to spherical blast treatment. That is, by further performing the spherical blasting treatment on the hard surface treatment layer 21, the surface of the hard surface treatment layer 21 is further processed into an uneven surface, and is covered with the hard surface that has been further work hardened.
【００３８】図３は第三の実施例として、現像スリーブ
２の表面をサンドブラスト処理を行なった後に硬質表面
処理層21で覆い、その処理層の上を更に球形ブラスト処
理を行なった状態の拡大図を示している。従ってその完
成表面状態は、図２で示した状態と良く似ているし、そ
の表面硬度も同程度であるが、現像スリーブ２の表面が
まずサンドブラスト処理を行なっているため、図２に比
べてその完成表面状態は若干凹凸が大きい。As a third embodiment, FIG. 3 is an enlarged view of a state in which the surface of the developing sleeve 2 is sandblasted and then covered with a hard surface treatment layer 21, and the treatment layer is further spherically blasted. Is shown. Therefore, the completed surface state is very similar to the state shown in FIG. 2 and the surface hardness is also about the same, but since the surface of the developing sleeve 2 is first sandblasted, compared to FIG. The finished surface state is slightly uneven.
【００３９】図４は第四の実施例として、現像スリーブ
２の表面を硬質表面処理層21で覆い、その上を球形ブラ
スト処理を行なった状態の拡大図を示している。従って
硬質表面処理層21の表面は球形ブラスト処理による凹凸
と共に加工硬化によって硬い表面で覆われることにな
る。FIG. 4 shows, as a fourth embodiment, an enlarged view of a state in which the surface of the developing sleeve 2 is covered with a hard surface treatment layer 21 and a spherical blast treatment is performed on it. Therefore, the surface of the hard surface treatment layer 21 is covered with the hard surface by work hardening together with the unevenness due to the spherical blast treatment.
【００４０】以上図１から図４で示した現像スリーブを
まとめると次の様になる。The developing sleeves shown in FIGS. 1 to 4 are summarized as follows.
【００４１】現像スリーブの表面が球形ブラスト処理に
より、サンドブラスト処理の場合の様に荒い毛羽立ちの
面ではない比較的に滑らかな凹凸の表面となり、且つそ
の表面を硬質表面処理を行なうことにしたため耐摩粍性
が大となり、更にこの上を球形ブラスト処理をする場合
は球形ブラスト処理により更に凹凸の面に加工され、硬
質表面処理層の表面が更に加工硬化されて耐摩粍性が大
となり、現像剤搬送量の経時変化が少なくなって耐久性
が向上することになった。またこの様な現像スリーブの
表面状態により、現像剤の薄層が形成出来るようになっ
たため薄層形成体の現像スリーブへの押圧も弱い力です
む様になった。この両者の組み合わせ効果により、現像
スリーブが従来より格段にすぐれた耐久性をもち、また
安定した薄層形成が出来るようになったため、経時変化
の少い高画質の画像形成が出来るようになった。By the spherical blasting treatment, the surface of the developing sleeve becomes a relatively smooth uneven surface, which is not a rough fluffy surface as in the sandblasting treatment, and the surface is subjected to a hard surface treatment, so that abrasion resistance is caused. When the spherical blast treatment is performed on this surface, the spherical blast treatment is used to process the surface further into an uneven surface, and the surface of the hard surface treatment layer is further processed and hardened to increase abrasion resistance and to convey the developer. The change over time in the amount was reduced and the durability was improved. Further, due to the surface condition of the developing sleeve, a thin layer of the developer can be formed, so that the thin layer forming body can be pressed against the developing sleeve with a weak force. Due to the combined effect of both of them, the developing sleeve has much more excellent durability than the conventional one, and stable thin layer formation can be performed, so that it is possible to form a high quality image with little change with time. ..
【００４２】また、本発明によって現像スリーブの表面
にはサンドブラスト処理の時の様な鋭い突起がなくなっ
たので、現像性を良くするため現像スリーブにＡＣバイ
アス電圧を印加してもＡＣバイアス電圧のリークが起り
にくいので現像性が向上するというメリットも生じるこ
ととなった。Further, according to the present invention, the surface of the developing sleeve is free of sharp protrusions as in the sandblasting process. Therefore, even if an AC bias voltage is applied to the developing sleeve in order to improve developability, the AC bias voltage leaks. Since this is less likely to occur, there is an advantage that the developability is improved.
【００４３】[0043]
【発明の効果】本発明により、現像スリーブの現像剤の
搬送性を安定化して耐久性をもたせ、画像濃度の経時変
化を小さくし、また現像スリーブの現像剤の層厚を薄く
し、且つ安定して薄く保持出来るようにして高画質の画
像が得られる様にした現像装置が提供されることとなっ
た。According to the present invention, the developer carrying property of the developing sleeve is stabilized to provide durability, the change of the image density with time is reduced, and the developing sleeve layer thickness is made thin and stable. Thus, a developing device is provided which is capable of holding a thin image and is capable of obtaining a high quality image.
【図１】本発明に基づく第一の実施例の現像剤担持体
（現像スリーブ）表面拡大図。FIG. 1 is an enlarged view of the surface of a developer carrying member (developing sleeve) according to a first embodiment of the present invention.
【図２】本発明に基づく第二の実施例の現像剤担持体
（現像スリーブ）表面拡大図。FIG. 2 is an enlarged view of the surface of a developer carrying member (developing sleeve) according to a second embodiment of the present invention.
【図３】本発明に基づく第三の実施例の現像剤担持体
（現像スリーブ）表面拡大図。FIG. 3 is an enlarged view of the surface of a developer carrying member (developing sleeve) according to a third embodiment of the present invention.
【図４】本発明に基づく第四の実施例の現像剤担持体
（現像スリーブ）表面拡大図。FIG. 4 is an enlarged view of the surface of a developer carrying member (developing sleeve) according to a fourth embodiment of the present invention.
【図５】本発明に基づく現像装置の全体構成図。FIG. 5 is an overall configuration diagram of a developing device based on the present invention.
【図６】本発明に基づく現像装置の現像剤量規制体（薄
層形成体）付近の縦断面図。FIG. 6 is a longitudinal sectional view of the vicinity of a developer amount regulating body (thin layer forming body) of a developing device according to the present invention.
【図７】従来の現像装置主要部の図で（ａ）は現像スリ
ーブへ磁力により現像剤量規制体（薄層形成体）を押圧
している状況を示している図。（ｂ）は（ａ）に更に弾
性部材の押圧力が加わっている状況を示している図。
（ｃ）は現像剤量規制体（薄層形成体）が板状の弾性材
の場合の図。FIG. 7A is a diagram of a main part of a conventional developing device, and FIG. 7A is a diagram showing a state in which a developer amount regulating body (thin layer forming body) is pressed against a developing sleeve by a magnetic force. FIG. 9B is a diagram showing a situation in which the pressing force of the elastic member is further applied to FIG.
(C) is a figure in case a developer amount regulation body (thin layer formation body) is a tabular elastic material.
【図８】サンドブラスト処理をした現像剤担持体（現像
スリーブ）表面拡大図。FIG. 8 is an enlarged view of the surface of a developer carrying member (developing sleeve) that has been sandblasted.
【図９】球形ブラスト処理をした現像剤担持体（現像ス
リーブ）表面拡大図。FIG. 9 is an enlarged view of the surface of a developer carrying member (developing sleeve) that has been spherically blasted.
【図１０】球形ブラスト処理とサンドブラスト処理の現
像剤搬送量の経時変化グラフ。FIG. 10 is a graph showing changes over time in the amount of developer conveyed in spherical blasting and sandblasting.
【符号の説明】 １ 像担持体 ２ 現像剤担持体（現像スリーブ） 21 硬質表面処理層 31 現像剤量規制体（薄層形成体） 50 現像装置[Explanation of symbols] 1 Image carrier 2 Developer support (development sleeve) 21 Hard surface treatment layer 31 Developer amount regulator (thin layer former) 50 Development device
Claims (6)
ための、表面上に現像剤を担持する剛性を有する現像剤
担持体と、該現像剤担持体に押圧し、該現像剤担持体に
担持された前記現像剤の量を規制する現像剤量規制体を
配設した現像装置において、前記現像剤担持体の表面は
球形ブラスト処理を行なった後に硬質表面処理層で覆っ
た事を特徴とする現像装置。1. A developer carrier having rigidity for carrying a developer on a surface for developing a latent image formed on an image carrier, and the developer being pressed against the developer carrier. In a developing device provided with a developer amount regulating body that regulates the amount of the developer carried on a carrier, the surface of the developer carrier is covered with a hard surface treatment layer after spherical blasting. Developing device.
処理を行なった後に硬質表面処理層で覆い、更に球形ブ
ラスト処理を行なった事を特徴とする請求項１記載の現
像装置。2. The developing device according to claim 1, wherein the surface of the developer carrying member is spherically blasted, then covered with a hard surface treatment layer, and further spherically blasted.
ト処理を行なった後に硬質表面処理層で覆い、更に球形
ブラスト処理を行なった事を特徴とする請求項１記載の
現像装置。3. The developing device according to claim 1, wherein the surface of the developer carrying member is subjected to an amorphous blast treatment, then covered with a hard surface treatment layer, and further subjected to a spherical blast treatment.
層で覆った後に球形ブラスト処理を行なった事を特徴と
する請求項１記載の現像装置。4. The developing device according to claim 1, wherein the surface of the developer carrier is covered with a hard surface treatment layer and then spherical blast treatment is performed.
担持体の表面硬度より高い処理層である事を特徴とする
請求項１乃至４のいずれか１項に記載の現像装置。5. The developing device according to claim 1, wherein the hardness of the hard surface treatment layer is higher than the surface hardness of the developer carrier.
記現像剤担持体へ磁力により押圧することを特徴とする
請求項１乃至５のいずれか１項に記載の現像装置。6. The developing device according to claim 1, wherein the developer amount regulating body is a magnetic body and is pressed against the developer carrying body by a magnetic force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3179580A JPH0527581A (en) | 1991-07-19 | 1991-07-19 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3179580A JPH0527581A (en) | 1991-07-19 | 1991-07-19 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0527581A true JPH0527581A (en) | 1993-02-05 |
Family
ID=16068215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3179580A Pending JPH0527581A (en) | 1991-07-19 | 1991-07-19 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527581A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589916A (en) * | 1993-05-28 | 1996-12-31 | Fuji Xerox Co., Ltd. | Developing apparatus |
| EP0915393A2 (en) * | 1997-11-10 | 1999-05-12 | Canon Kabushiki Kaisha | Developer bearing body electroless plated on blasted surface using spherical particles, production method therefor and developing apparatus using the same |
| US6484006B2 (en) * | 2000-12-29 | 2002-11-19 | Toshiba Tec Kabushiki Kaisha | Developing device with developer layer regulating blade |
| JP2009086658A (en) * | 2007-09-13 | 2009-04-23 | Ricoh Co Ltd | Developing roller and its manufacturing method, developing device, process cartridge, and image forming apparatus |
| US8973396B2 (en) | 2009-06-05 | 2015-03-10 | Denso Corporation | Cold-storage heat exchanger |
-
1991
- 1991-07-19 JP JP3179580A patent/JPH0527581A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589916A (en) * | 1993-05-28 | 1996-12-31 | Fuji Xerox Co., Ltd. | Developing apparatus |
| EP0915393A2 (en) * | 1997-11-10 | 1999-05-12 | Canon Kabushiki Kaisha | Developer bearing body electroless plated on blasted surface using spherical particles, production method therefor and developing apparatus using the same |
| EP0915393A3 (en) * | 1997-11-10 | 2000-03-15 | Canon Kabushiki Kaisha | Developer bearing body electroless plated on blasted surface using spherical particles, production method therefor and developing apparatus using the same |
| US6178306B1 (en) * | 1997-11-10 | 2001-01-23 | Canon Kabushiki Kaisha | Developer bearing body electroless plated on blasted surface using spherical particles, production method therefor and developing apparatus using the same |
| US6484006B2 (en) * | 2000-12-29 | 2002-11-19 | Toshiba Tec Kabushiki Kaisha | Developing device with developer layer regulating blade |
| JP2009086658A (en) * | 2007-09-13 | 2009-04-23 | Ricoh Co Ltd | Developing roller and its manufacturing method, developing device, process cartridge, and image forming apparatus |
| US8973396B2 (en) | 2009-06-05 | 2015-03-10 | Denso Corporation | Cold-storage heat exchanger |
| US8973395B2 (en) | 2009-06-05 | 2015-03-10 | Denso Corporation | Cold-storage heat exchanger |
| US8978411B2 (en) | 2009-06-05 | 2015-03-17 | Denso Corporation | Cold-storage heat exchanger |
| US9032757B2 (en) | 2009-06-05 | 2015-05-19 | Denso Corporation | Cold-storage heat exchanger |
| US10132549B2 (en) | 2009-06-05 | 2018-11-20 | Denso Corporation | Cold-storage heat exchanger |
| US11029073B2 (en) | 2009-06-05 | 2021-06-08 | Denso Corporation | Cold-storage heat exchanger |
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