JPS58176660A - Developing device - Google Patents

Abstract

PURPOSE:To prevent the change in regulation volume owing to sticking of a toner on a volume regulation member which is provided so as to face the developing sleeve of a magnetic brush developing device and consists of a circular columnar magnetic material by turning said member. CONSTITUTION:A developer 7 consisting of a one-component magnetic toner or a magnetic carrier and a toner is contained in a magnetic brush developing device 2, and is attracted and conveyed on a sleeve 4 by the rotating magnetic field of a magnetic roll 5 rotating in said sleeve. The conveyed developer is first regulated of conveyance volume by a preliminary regulation member 11 then by a circular columnar volume regulation member 9 consisting of a magnetic material such as iron or ferrite to specified volume, whereafter the developer is fed to a developing section. The member 9 is turned continuously or intermittently in the same direction as the direction of the developer or opposite therefrom. A scraper 10 is preferably provided to remove the stuck flocs.

Description

【発明の詳細な説明】 複写機環の現像装置の改良に関し、詳しくは、磁力によ
って表面に現像剤を付着させて現像領域へ搬送する現像
剤搬送担体と、該現像剤搬送担体が現像領域へ搬送する
現像剤の量を規制する現像剤量規制部材とを備えた現像
装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Regarding the improvement of the developing device of the copying machine ring, in detail, it includes a developer transporting carrier that attaches developer to the surface by magnetic force and transports it to the developing area, and a developer transporting carrier that transports the developer to the developing area. The present invention relates to an improvement of a developing device including a developer amount regulating member that regulates the amount of developer to be conveyed.

上述のような従来の現像装置として、現像剤搬送担体に
、非磁性体からなるスリーブの内部に、外周面の周方向
にＮ極とＳ極とを交互に有して回転する磁石円筒体を設
けたものや回転する磁石円筒体等を用いて、その現像剤
搬送体の現像剤送り出し側表面に対し適当な間隙を保つ
ように現像剤の付着社を規制する現像剤量規制板（以下
単に量規制板と呼ぶ）を設けたもの、あるいは、その量
規制板を現像剤搬送担体側の磁力によって誘導磁気を生
ずる磁性体で形成した特開昭１３−１２３７４４１号公
報に記載されたようなものが知られている。In the conventional developing device as described above, a rotating magnetic cylindrical body having N poles and S poles alternately in the circumferential direction of the outer circumferential surface is provided inside a sleeve made of a non-magnetic material as a developer transport carrier. A developer amount regulating plate (hereinafter simply referred to as a developer amount regulating plate) that regulates the adhesion of developer so that an appropriate gap is maintained with respect to the developer delivery side surface of the developer transporting body using a rotating magnet cylinder or the like. (referred to as a quantity regulating plate), or one such as that described in JP-A-13-1237441, in which the quantity regulating plate is made of a magnetic material that generates induced magnetism by the magnetic force on the developer transport carrier side. It has been known.

現像剤量規制板が非磁性体からなるものでは、現像剤を
現像剤搬送担体に薄く均一に付着させることが非常に轢
かしく、また、磁性トナー粒子の凝集や磁性キャリヤ粒
子の損傷が起り易いと云う問題がある。それを改良した
特開昭３３−／コ５ｔｒｉｌＩ号公報記載のものでは、
量規制板の誘導磁槃と現像剤搬送担体側の磁石とで形成
される磁界によって量規制板の規制作用が向上して、現
像剤搬送担体への現像剤の付着が比較的容易に薄く均一
に行われるようになるが、しかし依然として、磁性トナ
ー粒子の凝集や磁性キャリヤ粒子の損傷が起り易いと云
う問題は解消されない。If the developer amount regulating plate is made of a non-magnetic material, it is very difficult to adhere the developer thinly and uniformly to the developer transport carrier, and it is also easy to cause aggregation of the magnetic toner particles and damage to the magnetic carrier particles. There is a problem. The improved method described in Japanese Patent Application Laid-Open No. 33-1995/Ko5trilI,
The regulating action of the quantity regulating plate is improved by the magnetic field formed by the induction magnet of the quantity regulating plate and the magnet on the side of the developer transporting carrier, so that the developer adheres to the developer carrying carrier relatively easily and thinly and uniformly. However, the problems of agglomeration of magnetic toner particles and damage to magnetic carrier particles still remain.

そこで、本発明者らは先に、少くとも現像剤量を規制す
る作用部分が誘導磁気を生ずる磁性体がらなり円柱状で
ある現像剤量規制部材（以下単に量規制部材と呼ぶ）を
用いることにより、上述の量規制板における問題を解消
した現像装置を発明した。その発明は、特願昭３６−３
１２”３２号により出願されている。その発明によれば
、現像剤搬送担体に現像剤を薄く均一に付着させること
ができ、しか本磁性トナー粒子の凝集や磁性キャリヤ粒
子の損傷を起すことが極めて少ないと云う優れた効果を
得ることができる。しかし、それでも長時間運転を続け
ると、従来の量規制板におけると同様な量規制部材への
現像剤の付着の成長が生じ、量規制部材の規制間隔が次
第に挟まるようになり、均一規制が行われなくなって、
現像に影響するようになると云う問題がある。Therefore, the inventors of the present invention first proposed using a developer amount regulating member (hereinafter simply referred to as the amount regulating member) in which at least the action portion regulating the developer amount is made of a magnetic material that generates induced magnetism and is cylindrical. Thus, a developing device was invented which solved the problem with the above-mentioned quantity regulating plate. The invention was patented in 1976-3.
No. 12''32. According to the invention, the developer can be thinly and uniformly adhered to the developer transport carrier, but the invention does not cause agglomeration of the magnetic toner particles or damage to the magnetic carrier particles. However, if the operation is continued for a long time, the amount of developer attached to the amount regulating member will grow, similar to that of the conventional amount regulating plate, and the amount of developer attached to the amount regulating member will deteriorate. The regulation intervals gradually became narrower, and uniform regulations were no longer enforced.
There is a problem in that it affects development.

本発明は、さらにその問題も解消するようにした現像装
置を提供するものであり、本発明の現像装置は、磁力に
よって表面に現像剤を付着させて現像領域へ搬送する現
像剤搬送担体と、該現像剤搬送担体が現像領域へ搬送す
る現像剤の量を規制する現像剤量規制部材とを備えた現
像装置において、前記現像剤量規制部材がその規制作用
をする表面に前記磁力によって誘導磁界を生ずる回動体
からなることを特徴とし、との特徴によって、長時間運
転しても均一規制が崩れることがないと云う優れた効果
を与えるものである。The present invention provides a developing device which further solves this problem. In a developing device including a developer amount regulating member that regulates the amount of developer transported by the developer transporting carrier to a developing area, the developer amount regulating member generates an induced magnetic field by the magnetic force on the surface where the developer amount regulating member acts. This feature provides an excellent effect in that the uniformity regulation does not collapse even after long hours of operation.

以下、本発明を図面を参照して詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.

第１図は本発明のトナー現像装置の一例を示す概要構成
断面図、第２図は第１図の部分拡大図、ζ−雫 第３図乃至第５図は本発明の異なる実施態様を示す部分
断面図である。FIG. 1 is a schematic cross-sectional view showing an example of the toner developing device of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and ζ-drops FIGS. 3 to 5 show different embodiments of the present invention. FIG.

図において、ｌは表層が感光層等からなり、矢、　　印
方向に回転して表面に静電潜像が形成され、その静電潜
像を現像装置λによって現像される複写機等の像担持体
、３は現像装置λの現像剤搬送担体で、第１図乃至第参
図の現像剤搬送担体３は。In the figure, l is an image carrier in a copying machine, etc., whose surface layer is made of a photosensitive layer, etc., and an electrostatic latent image is formed on the surface by rotating in the direction of the arrow, and the electrostatic latent image is developed by a developing device λ. Reference numeral 3 denotes a developer transport carrier of the developing device λ, which is the developer transport carrier 3 shown in FIGS.

非磁性体よりなるスリーブ参の内部に外周面の周方向に
Ｎ極とＳ極とを交互に有する円筒状磁石体ｊを設けた構
成よりなり、第５図においては、現像剤搬送担体３は、
第１図乃至第１図における円筒状磁石体よと同様な円筒
磁石体ぶ、またはその外周面に保麺層としての非磁性体
層を設けた円筒磁石体６よりなる。そして、第１図乃至
第３図の現像剤搬送担体３においては、スリーブ参が固
定で、円筒状磁石体ｊが矢印方向に回転（通常ｌｏ。It has a structure in which a cylindrical magnet body j having N poles and S poles alternately in the circumferential direction of the outer peripheral surface is provided inside a sleeve made of a non-magnetic material. ,
It consists of a cylindrical magnet body similar to the cylindrical magnet body shown in FIG. In the developer transport carrier 3 shown in FIGS. 1 to 3, the sleeve 3 is fixed, and the cylindrical magnet j rotates in the direction of the arrow (usually LO).

〜コｏｏｏ　ｒｐｍ　）　Ｌ、、第参図の現像剤搬送担
体３においては、スリーブ−が矢印方向に回転して、円
筒状磁石体ｊがスリーブ参の回転方向とは逆の矢印方向
に回転するように構成されており、第５図の現像剤搬送
担体３である円筒磁石体６は矢印方向′　に回転するよ
うに構成されている。それＫよって、現像装置コの現像
剤溜り７の現像剤は、第１図凸金第３図の一現像剤搬送
担体３においては、固定したスリーブ参の表面に付着し
て、その表面上を円筒状磁石体ｊの回転方向と逆の方向
に移動するようになり、第ψ図の現像剤搬送担体３にお
いては、回転するスリーブ参の表面に付着してスリーブ
ｑと同方向に移動するようになり、また、第５図の現像
剤搬送担体３である円筒状石体乙においては、円筒磁石
体乙の表面に付着してその表面と共に移動することにな
るから、いずれの現像装置コによっても、現像剤搬送担
体３が像担持体面に近接している現像領域において、静
電潜像のトナーによる現像が行われることになる。すな
わち、第１図乃至第ｑ図の現像剤搬送担体３においては
、現像剤ｌはスリーブダに付着して搬送されて円筒状磁
石体Ｓの表面には付着しないから、したがって円筒状磁
石体ｊの外周面は必ずしも円滑な表面であることを要せ
ず、それに対して、第５図の現像剤搬送担体３において
は、現像剤ｌが円筒磁石体乙の表面に付着して搬送され
るから、円筒磁石体６の外周面は凹凸のない略円滑な表
面であることが望ましい。円筒状磁石体と円筒磁石体の
表現の相違は、上述の相違があることを示している。In the developer transport carrier 3 shown in Figure 1, the sleeve rotates in the direction of the arrow, and the cylindrical magnet j rotates in the direction of the arrow opposite to the direction of rotation of the sleeve. The cylindrical magnet body 6, which is the developer conveying carrier 3 in FIG. 5, is configured to rotate in the direction of the arrow '. Therefore, the developer in the developer reservoir 7 of the developing device adheres to the surface of the fixed sleeve in the developer transport carrier 3 shown in FIG. It moves in the opposite direction to the rotating direction of the cylindrical magnet j, and in the developer transport carrier 3 shown in Fig. ψ, it adheres to the surface of the rotating sleeve q and moves in the same direction as the sleeve q. In addition, since the cylindrical stone body B, which is the developer transport carrier 3 in FIG. Also, the electrostatic latent image is developed with toner in the development region where the developer transport carrier 3 is close to the image carrier surface. That is, in the developer transport carrier 3 shown in FIGS. 1 to q, the developer l is transported while adhering to the sleeve holder and does not adhere to the surface of the cylindrical magnet S. The outer circumferential surface does not necessarily have to be a smooth surface; on the other hand, in the developer transport carrier 3 shown in FIG. It is desirable that the outer circumferential surface of the cylindrical magnet body 6 be a substantially smooth surface without irregularities. The difference in expression between the cylindrical magnet body and the cylindrical magnet body indicates that there is the above-mentioned difference.

以上のような現像剤搬送担体３による現像剤ｊの搬送が
薄く均一に行われるように、現像剤搬送担体３に近接し
て現像剤ｔの送り出し側に１鉄、フェライトのような磁
性体からなる量規制部材９．ｔ′を設けている。第１図
、第２図および第参図、第５図の量規制部材デは、いず
れも円柱状に形成されており、第３図の量規制部材９′
は、現像剤搬送担体３と反対側を切り欠いた半円柱状に
形成されていて、円柱状周面が現像剤搬送担体３の表面
に対向するように設けられる。このような量規制部材デ
、９′を固定して設けたのが前述の特願昭５ｔ−３１コ
６コ号の発明であり、回動可能に設けたのが本発明であ
る。In order to ensure that the developer j is transported thinly and uniformly by the developer transport carrier 3 as described above, a magnetic material such as iron or ferrite is placed near the developer transport carrier 3 on the delivery side of the developer t. Amount regulating member 9. t' is provided. The amount regulating member 9' in FIGS. 1, 2, and 5 is cylindrical, and the amount regulating member 9' in FIG.
is formed in a semi-cylindrical shape with the side opposite to the developer transport carrier 3 cut out, and is provided such that the cylindrical peripheral surface faces the surface of the developer transport carrier 3. It is the invention of the above-mentioned Japanese Patent Application No. 5T-31-6 that provides such a quantity regulating member 9' in a fixed manner, and the present invention provides that it is rotatable.

そこで、本発明の作用効果の説明に入る前に、理解を深
めるために、まず特願昭ｊ≦−３ｔコロ２号について説
明する。Therefore, before going into the explanation of the effects of the present invention, for better understanding, we will first explain Japanese Patent Application Shoj≦-3t Colo No. 2.

上述のような量規制部材９，９′は、円柱状の周面が現
像剤搬送担体３に対向していることから、現像剤搬送担
体３１１の磁石体の磁力に応じて、且つ、現像剤搬送担
体３に近い所程磁気密度が高く、遠去かるに従って磁気
密度が粗になるように１第λ図に一時機についての状態
を示したように磁化される。しか屯、このような磁化に
よって生じた磁極■、■は、現像剤搬送担体３の磁石体
が前述のように回転するものであるときは、それに伴っ
て磁気密度も変えながら対向面側で磁石体の磁極と同じ
方向に進む変化をする。量規制部材９，９′はこのよう
に磁化されるから、現像剤搬送担体３の表面に過剰に付
着した現像剤ｌは、過剰分が量規制部材り、９′によっ
て吸着されて現像剤搬送担体３から除・かれ、さらに遠
去けられるように運ばれる。即ち、量規制部材９，９′
は、単に現像剤搬送担体３きの間隙によって現像剤の通
過量を規制するだけではなく、誘導磁気によってその規
制効果を向上させると共に、堰止められて溜る現像剤を
現像剤搬送担体３の表面から遠去けると云う働きをする
。それによって、従来の磁性体の敞規制板でも得られな
かった、磁性トナー粒子の凝集や磁性体キャリヤ粒子の
損傷等を起すことなしに現像剤搬送担体が現像剤を薄く
均一に搬送すると云う量規制を可能としだのである。な
お、図中のｌθは量規制部材９，９′に付着して運ｄれ
た現像剤ｌを量規制部材９，９′から脱落させるだめの
スクレーバであり、量規制部材り、９′の誘導磁気は現
像剤搬送担体３から離れた所程弱いから、付着して運ば
れた現像剤ｔは運ばれる途中で大半が自然に脱落するよ
うになるので、スクレーパ１０は必要に応じて設ければ
よいものであった。また、第１図の／／は非磁性体から
なる予備規制部材で、現像剤搬送担体３に付着して量規
制部材９による規制位置に運ばれるスリーブ参上の現像
剤ｊの量を予め規制するものであるが、図示の予備規制
部材ｌ／はさらに、量規制部材９から脱落した現像剤ｊ
を補給ホッパー／２　＠　Ｋ導いて、補給ホッパー１２
から補給されたトナー粒子と混合させる役割も果してい
る。この予備規制部材／ｌも必要に応じて設ければよい
ものである。Since the above-mentioned amount regulating members 9 and 9' have their cylindrical circumferential surfaces facing the developer transport carrier 3, the amount regulating members 9 and 9' can control the amount of developer depending on the magnetic force of the magnet of the developer transport carrier 311. The magnetic density is higher nearer to the carrier 3, and the magnetic density becomes coarser as it gets farther away, so that it is magnetized as shown in FIG. However, if the magnetic body of the developer transport carrier 3 rotates as described above, the magnetic poles (2) and (2) generated by such magnetization will change the magnetic density on the opposing surface side accordingly. Changes that move in the same direction as the body's magnetic poles. Since the amount regulating members 9 and 9' are magnetized in this way, the excess amount of the developer l adhering to the surface of the developer transport carrier 3 is absorbed by the amount regulating member 9' and the developer is transported. It is removed from the carrier 3 and transported further away. That is, the amount regulating members 9, 9'
The system not only regulates the amount of developer passing through the gap between the developer transport carriers 3, but also improves the regulation effect using induced magnetism, and also directs the developer that is dammed and accumulated on the surface of the developer transport carrier 3. It has the function of being able to move away from. This allows the developer transport carrier to transport developer thinly and uniformly without causing agglomeration of magnetic toner particles or damage to magnetic carrier particles, which could not be achieved with conventional magnetic thickness regulating plates. This made regulation possible. In addition, lθ in the figure is a scraper for removing the developer l that has adhered to the amount regulating members 9, 9' from the amount regulating members 9, 9'. Since the induced magnetism is weaker as the distance from the developer transport carrier 3 increases, most of the adhered developer t will naturally fall off during the transport, so the scraper 10 is provided as necessary. It was a good thing. Further, // in FIG. 1 is a pre-regulating member made of a non-magnetic material, which pre-regulates the amount of developer j on the sleeve that adheres to the developer transport carrier 3 and is transported to the regulated position by the amount regulating member 9. However, the illustrated preliminary regulating member l/ furthermore prevents the developer j falling off from the amount regulating member 9.
Supply hopper/2 @ K leads to supply hopper 12
It also plays the role of mixing with toner particles supplied from. This preliminary regulating member /l may also be provided as necessary.

以上述べた現像装置の構成及び作用効果が特願昭ｊｔ−
３１２６２号の発明に関するものである。The structure and operation and effects of the developing device described above are disclosed in the patent application.
This invention relates to the invention of No. 31262.

さて、本発明においてはさらに、量規制部材り。Now, the present invention further includes a quantity regulating member.

９′を機械的に回動させるようにしている。それは、現
像剤量の規制即ち、現像剤搬送担体３上の過剰の現像剤
の運び去りを量規制部材９，９′に生起する誘導磁気の
搬送作用だけで行い、量規制部材９゜９′上の付着現像
剤を積極的に掻き落すようにしない場合は、長時間の運
転において、量規制部材９゜９′に現像剤（特にトナー
）が付着し成長してしまうことが起り、そのため現像剤
規制量が変化（経時的、位置的）シ、ひいてはトナー画
像に影響を及はすことがあったので、この８題を解消す
るようにしだのが本発明である。9' is mechanically rotated. This is because the amount of developer is regulated, that is, the excess developer on the developer transport carrier 3 is carried away only by the conveying action of the induced magnetism generated in the amount regulating members 9, 9'. If you do not actively scrape off the developer adhering to the top, during long-term operation, developer (particularly toner) may adhere to and grow on the amount regulating member 9゜9', causing the development The present invention is designed to solve these eight problems because the controlled amount of the agent changes (over time or positionally), which may even affect the toner image.

本発明におゆる量規制部材９．９′の回動け、量規制部
材り、９′に付着する現像剤を迅速に除去するのが主目
的であるから、そのためには現像中に行われても、現像
前あるいは現像後に行われてもよく、シたがって、連続
的でも間欠的でもよい。Since the main purpose of the present invention is to rotate the amount regulating member 9, 9', and quickly remove the developer adhering to the amount regulating member 9, 9', the rotation is performed during development. It may also be carried out before or after development, and therefore may be continuous or intermittent.

しかし、回動は非現像時に行われるようにするのが好ま
しい。また、回動方向を規制位置で現像剤の搬送される
方向と同じにしたときには、回動速度を現像剤の搬送速
度よりも遅くすることが好ましいし、回動方向を現像剤
の搬送方向と逆になるようにすることは、より大きガ規
制効果が得られる点で好ましい。なお、第３図の量規制
部材ｔ′の場合は、回動は左右の往復回動となる。省ら
に、ｊｉｔ規制部材デ、９′の円柱状外周の曲率牛径を
現像剤搬送担体３の表面上における磁石体のＮ、Ｓ磁−
極間隔よりも小さくする方が量規制部材９の磁化による
効果を大きくする上で好ましい。また、スクレーパＩＯ
を設けるようにすることは、量規制部材り、デ上に付着
した凝集物をも除去するので一層好ましい。なお、量規
制部材９．９′の表面には、汚れの付着や錆の発生を防
止し、表面を滑らかＫするような、樹脂保護膜等を設け
るようにしてもよい。However, it is preferable that the rotation be performed during non-development. Furthermore, when the direction of rotation is the same as the direction in which the developer is conveyed at the regulation position, it is preferable that the rotation speed is slower than the conveyance speed of the developer; It is preferable to do the opposite because a greater moth restriction effect can be obtained. In the case of the amount regulating member t' shown in FIG. 3, the rotation is a reciprocating movement from side to side. The diameter of the curvature of the cylindrical outer periphery of the jit regulating member 9' is determined by the N and S magnets of the magnet on the surface of the developer transport carrier 3.
It is preferable to make the distance smaller than the pole spacing in order to increase the effect of magnetization of the amount regulating member 9. Also, scraper IO
It is more preferable to provide the amount regulating member because it also removes aggregates adhering to the amount regulating member. It should be noted that a resin protective film or the like may be provided on the surface of the amount regulating member 9,9' to prevent the adhesion of dirt and the generation of rust and to make the surface smooth.

本発明においては、現像剤ｌが磁性Ｆナー粒子よりなる
一成分系の現像剤であっても、非磁性若しくは磁性トナ
ー粒子と磁性キャリヤ粒子の混合よりなる二成分系現像
剤であってもよいし、現像域において、像担持体面と現
像剤搬送担体による現像剤の搬送方向が同方向であって
も、反対方向であってもよい。また、予備規制部材に量
規制部材と同様のものを用いてもよい。In the present invention, the developer l may be a one-component developer made of magnetic F toner particles, or a two-component developer made of a mixture of non-magnetic or magnetic toner particles and magnetic carrier particles. However, in the development area, the direction in which the image carrier surface and the developer conveyance by the developer conveyance carrier may be the same or opposite. Furthermore, the same material as the amount regulating member may be used as the preliminary regulating member.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の現像装置の一例を示す概要構成断ｒｋ
ｉ図、第２図は第７図の部分拡大図、第３１ズ乃至第ｊ
図は本発明の異なる実施態様を示す部分断面図である。 ／・・・像担持体、　　　　λ・・・現像装置、３・・
・現像剤搬送担体、　ｌ・・・スリーブ、Ｓ・・・円筒
状磁石体、　　６・・・円筒磁石体、７・・・現像剤溜
り、　　　ｌ・−現像剤、り、９′・・・量規制部材、
　／θ・・・スクレーパ、／ｌ・−・予備規制部材、　
　／２・・・補給ホッパー。FIG. 1 is a schematic diagram showing an example of the developing device of the present invention.
Figure i, Figure 2 are partially enlarged views of Figure 7, 31st to j
The figures are partial sectional views showing different embodiments of the invention. /...Image carrier, λ...Developing device, 3...
・Developer transport carrier, l...sleeve, S...cylindrical magnet, 6...cylindrical magnet, 7...developer reservoir, l...developer, ri, 9'... quantity regulating parts,
/θ...Scraper, /l...Preliminary regulation member,
/2... Supply hopper.

Claims (1)

【特許請求の範囲】 ｔ　磁力によって表面に現像剤を付着させて現像領域へ
搬送する現像剤搬送担体と、該現像剤搬送担体が現像領
域へ搬送する現像剤の鰍を規制する現像剤量規制部材と
を備えた現像装置において、前記現像剤量規制部材がそ
の規制作用をする表面に前記磁力によって誘導磁界を生
ずる回動体からなることを特徴とする現像装置。 ２、　前記現像剤量規制部材が間欠的に回動する特許請
求の範囲第１項記載の現像装置。 五　非現像時に前記現像剤量規制部材の回動が行われる
特許請求の範囲第２項記載の現像装置。 ４、　前記現像剤搬送担体が非磁性体からなるスリーブ
と該スリーブの内部に設置した外周面の周方向にＮ極と
ｓ４とを交互に有する円筒状磁石体とからなっていて、
上記スリーブと円筒状磁石体との間に相対回転が可能で
ある特許請求の範囲第１項乃至第５項記載の現像装置。 ５、　前記現像剤搬送担体が外周面の周方向にＮ極とＳ
極とを交互に有する回転可能の円筒磁石体又はその外周
向に非磁性体層を有する円”筒磁石体である特許請求の
範囲第１項乃至第５項記載の現像装置。[Scope of Claims] t. A developer transport carrier that attaches developer to its surface by magnetic force and transports it to the development area, and a developer amount regulation that regulates the amount of developer that the developer transport carrier transports to the development area. 1. A developing device comprising: a rotating member that generates an induced magnetic field by the magnetic force on a surface of which the developer amount regulating member acts as a regulating member; 2. The developing device according to claim 1, wherein the developer amount regulating member rotates intermittently. 5. The developing device according to claim 2, wherein the developer amount regulating member is rotated during non-development. 4. The developer transport carrier is composed of a sleeve made of a non-magnetic material and a cylindrical magnet body installed inside the sleeve and having N poles and S4 alternately in the circumferential direction of the outer peripheral surface,
6. The developing device according to claim 1, wherein relative rotation is possible between the sleeve and the cylindrical magnet. 5. The developer transport carrier has an N pole and an S pole in the circumferential direction of the outer peripheral surface.
6. The developing device according to claim 1, wherein the developing device is a rotatable cylindrical magnet body having alternating poles or a cylindrical cylindrical magnet body having a non-magnetic layer in the direction of its outer periphery.