JP2628605B2 - Stirring device for two-component developer - Google Patents
Stirring device for two-component developerInfo
- Publication number
- JP2628605B2 JP2628605B2 JP2283060A JP28306090A JP2628605B2 JP 2628605 B2 JP2628605 B2 JP 2628605B2 JP 2283060 A JP2283060 A JP 2283060A JP 28306090 A JP28306090 A JP 28306090A JP 2628605 B2 JP2628605 B2 JP 2628605B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- container
- conveying
- supply port
- stirring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】 〔概要〕 電子写真装置において使用される２成分現像剤の攪拌
装置に関し、 供給した現像剤の攪拌並びに均等分散に要する時間の
短縮化を目的とし、 電子写真装置において使用される２成分現像剤の攪拌
装置であって、前記２成分現像剤を攪拌混合すると共
に、接近して併設され、互いに逆方向に回転する２本の
搬送スクリューと、該搬送スクリューを囲繞すると共に
前記現像剤を収容する容器と、該容器の上面であって、
前記２本の搬送スクリューの併設方向中央位置に設けら
れた現像剤供給口とを具備するよう構成する。DETAILED DESCRIPTION OF THE INVENTION [Summary] A stirrer for a two-component developer used in an electrophotographic apparatus, which is used in an electrophotographic apparatus for the purpose of shortening the time required for stirring and evenly dispersing a supplied developer. A stirring device for a two-component developer, wherein the two-component developer is stirred and mixed, and two conveying screws which are arranged close to each other and rotate in opposite directions to each other, and surround the conveying screw. A container containing the developer, and an upper surface of the container,
A developer supply port provided at a central position in the direction in which the two conveying screws are arranged.
本発明は、電子写真装置において使用される２成分現
像剤の攪拌装置に関する。The present invention relates to a two-component developer stirring device used in an electrophotographic apparatus.
電子写真装置において、ドラム上にトナーを静電的に
付着させるためには該トナーを帯電させる必要がある。
このトナーを帯電させる方法として、キャリアと呼ばれ
る鉄粉と、トナーであるカーボンとを攪拌、混合すると
共にトナーを摩擦帯電させる方法がある。この２成分現
像剤を攪拌するには搬送スクリューを使用することが多
い。In an electrophotographic apparatus, it is necessary to charge the toner in order to electrostatically attach the toner on a drum.
As a method of charging the toner, there is a method of stirring and mixing iron powder called a carrier and carbon which is a toner and frictionally charging the toner. In order to stir the two-component developer, a conveying screw is often used.
搬送スクリューや現像剤を収容している容器には、劣
化した現像剤を排出するための排出口と、新たな現像剤
を供給する現像剤供給口とを有している。供給口は、消
耗したトナーのみの供給用としても使われる。これら供
給された現像剤の各成分は他方の成分と互いに十分に攪
拌、混合されなければならず、そのため搬送スクリュー
上に供給口を設け、搬送スクリュー上に落下させて攪拌
するのである。現像剤を十分に攪拌するため、２本の搬
送スクリューを併設し、互いに逆方向に回転させること
により現像剤を循環させつつ攪拌する方法が採られてい
る。The transport screw and the container containing the developer have a discharge port for discharging the deteriorated developer and a developer supply port for supplying new developer. The supply port is also used for supplying only the consumed toner. Each component of the supplied developer must be sufficiently stirred and mixed with the other component. Therefore, a supply port is provided on the transport screw, and the developer is dropped on the transport screw and stirred. In order to sufficiently stir the developer, a method has been adopted in which two conveying screws are provided side by side and rotated in opposite directions to circulate and stir the developer.
然しながら、トナーを補給した場合や、新たに現像剤
を供給した場合に、これらが搬送スクリューの回転によ
って一様に攪拌され、かつ、容器内に現像剤を行き渡ら
せるためには現像剤の供給口の位置によっては相応の時
間を要し、その間電子写真装置が使用できないという不
便があった。However, when toner is replenished or developer is newly supplied, these are uniformly stirred by the rotation of the conveying screw, and the developer supply port is required to spread the developer in the container. However, depending on the position, it takes a long time, and during that time, there is an inconvenience that the electrophotographic apparatus cannot be used.
依って本発明は、供給した現像剤の攪拌並びに均等分
散に要する時間の短縮化を目的とする。Accordingly, an object of the present invention is to shorten the time required for stirring and evenly dispersing the supplied developer.
上記課題を解決するために本発明は、２成分現像剤を
収容し得る容器と、容器内に配設した一対の撹拌・搬送
用の搬送スクリューと、容器の上面に設けた現像剤供給
用の現像剤供給口、とを含む２成分現像剤の撹拌装置で
あって、前記搬送スクリューは、その軸線が略同一水平
面内に位置し且つ相互平行に近接配置されて、互いに逆
方向に回転駆動され、前記現像剤供給口は、前記搬送ス
クリューの間であり且つ長手方向に関して略中間の位置
に位置することを構成上の特徴とする。In order to solve the above-mentioned problems, the present invention provides a container capable of containing a two-component developer, a pair of agitating / transporting conveying screws disposed in the container, and a developer supply provided on an upper surface of the container. A developer supply port, and a stirrer for the two-component developer, wherein the transport screw is positioned substantially in the same horizontal plane and is disposed in parallel and close to each other, and is driven to rotate in directions opposite to each other. The configuration is characterized in that the developer supply port is located between the transport screws and at a substantially intermediate position in the longitudinal direction.
現像剤供給口を２本の搬送スクリューの併設方向中央
位置に設けているため、この供給口から現像剤を投入す
ると夫々の搬送スクリュー上に現像剤が落下し、互いに
逆方向に回転する各搬送スクリュー上に落下した現像剤
は所定の方向に循環するが、容器の中全体に現像剤が行
き渡るまでの経路（時間）は、投入された現像剤が一方
の搬送スクリュー上にのみ落下した場合と比較して短く
なる。Since the developer supply port is provided at the central position in the direction in which the two conveying screws are provided, when the developer is supplied from the supply port, the developer falls on the respective conveying screws, and each of the conveying rollers rotating in opposite directions to each other. The developer that has fallen on the screw circulates in a predetermined direction, but the path (time) until the developer reaches the entire inside of the container depends on the case where the charged developer falls on only one of the conveying screws. It is shorter in comparison.
以下本発明を添付図面に示す実施例に基づき更に詳細
に説明する。Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.
第１図と第２図とを参照すると、容器12の中には分離
壁26を間に介在させて１対の搬送スクリュー10a,10bを
近接して併設している。各搬送スクリュー10a,10bは互
いに逆の方向に回転し、各搬送スクリュー上に載った現
像剤は閉ループを描く搬送軌跡によって１対の搬送スク
リュー上を循環する。容器12の上面であって、上記１対
の搬送スクリュー10a,10bの併設方向中央位置であっ
て、かつ、搬送スクリューの長手方向中央位置に現像剤
供給口16を設けてあり、トナーの補給や新たな現像剤を
供給することができる。この場合、トナーや現像剤28は
各搬送スクリュー上に落下することとなる。容器12の下
面には劣化した現像剤を排出させる排出口14が設けられ
ており、平常時はシャッターと呼ばれる蓋部材15によっ
て閉じられている。新たな現像剤を供給する場合には、
その前に前記排出口14から劣化した旧現像剤を排出して
おく必要があることは勿論である。Referring to FIG. 1 and FIG. 2, a pair of conveying screws 10a and 10b are juxtaposed in the container 12 with a separating wall 26 interposed therebetween. The transport screws 10a and 10b rotate in directions opposite to each other, and the developer loaded on each transport screw circulates on the pair of transport screws along a transport trajectory that forms a closed loop. A developer supply port 16 is provided on the upper surface of the container 12 at a central position in the direction in which the pair of transport screws 10a and 10b are provided and in a central position in the longitudinal direction of the transport screw. New developer can be supplied. In this case, the toner and the developer 28 fall on each transport screw. A discharge port 14 for discharging the deteriorated developer is provided on the lower surface of the container 12, and is normally closed by a lid member 15 called a shutter. When supplying new developer,
Before that, it is of course necessary to discharge the deteriorated old developer from the discharge port 14.
１対の搬送スクリューの併設方向前方には供給ローラ
18とマグネットローラ20とが搬送スクリューに平行に設
けられており、更にその前方であって容器12の外側位置
にはドラム30が配設されている。搬送スクリューによっ
て攪拌された現像剤を、供給ローラ18を介してマグネッ
トローラ20の表面に均等に吸着させるには、搬送スクリ
ュー10a,10bの長手方向に現像剤を均等に行き渡らせる
必要があるため、補給されたトナーや現像剤28のうち搬
送スクリュー10a上に落下したものは、ライン22で示す
軌跡によって攪拌されつつ移動し、搬送スクリュー10b
上に落下したものは、ライン24で示す軌跡を移動するま
で現像剤を供給ローラ18によってマグネットローラ20へ
供給することを停止しておかなければならず、その間は
電子写真装置そのものを作動させることができない。Supply roller in front of the pair of transport screws
An 18 and a magnet roller 20 are provided in parallel with the transport screw, and a drum 30 is provided in front of the transport screw and outside the container 12. To uniformly adsorb the developer agitated by the transport screw on the surface of the magnet roller 20 via the supply roller 18, it is necessary to spread the developer evenly in the longitudinal direction of the transport screws 10a and 10b. Of the replenished toner and developer 28, those that have fallen on the transport screw 10a move while being stirred by the trajectory indicated by the line 22, and the transport screw 10b
If the developer falls on the top, the developer must be stopped from being supplied to the magnet roller 20 by the supply roller 18 until the locus indicated by the line 24 moves. Can not.
然しながら、従来タイプの攪拌装置を主に示す第３図
を参照すると、供給口16は一方の搬送スクリュー10a上
に設けられており、投入されたトナー又は現像剤が行き
渡るにはライン23で示す軌跡を移動しなければならな
い。この移動時間は２本の搬送ローラ10a,10bの合計長
さに対応し、本発明の場合の移動時間がライン22（又は
24）に相当する長さに対応するため、本発明では従来の
半分の時間しかかからないことがわかる。これは、供給
するトナー或いは現像剤を互いに逆方向に回転している
各搬送スクリュー10a,10bに分割して落下させているこ
とに起因している。攪拌後の現像剤の均質化を考えれ
ば、第１図に示す様に供給口16は搬送スクリュー10a,10
bの併設方向位置中央位置のみならず、長さ方向の中央
位置であることが最も望ましいが、長さ方向中央位置か
ら幾分か一方に偏っていることは本発明の範囲内であ
る。However, referring to FIG. 3, which mainly shows a conventional type of agitating device, the supply port 16 is provided on one of the conveying screws 10a, and a path indicated by a line 23 is required for the supplied toner or developer to spread. Have to move. This moving time corresponds to the total length of the two transport rollers 10a and 10b, and the moving time in the case of the present invention is equal to the line 22 (or
In order to correspond to the length corresponding to 24), it can be seen that the present invention takes only half the time of the related art. This is due to the fact that the toner or the developer to be supplied is divided and dropped by the respective conveying screws 10a and 10b rotating in opposite directions. Considering the homogenization of the developer after stirring, as shown in FIG.
It is most desirable not only the center position in the juxtaposition direction of b but also the center position in the length direction, but it is within the scope of the present invention that it is slightly deviated to one side from the center position in the length direction.
以上の説明から明らかな様に本発明によれば、供給し
たトナーや現像剤の攪拌並びに均等分散に要する時間の
短縮化が達成される。As is apparent from the above description, according to the present invention, it is possible to shorten the time required for stirring and evenly dispersing the supplied toner and developer.
第１図は本発明に係る攪拌装置を主に示す斜視図、 第２図は第１図の矢視線Ｉ−Ｉによる断面図、 第３図は従来の攪拌装置を主に示す斜視図である。 10a,10b……搬送スクリュー、12……容器、16……供給
口、28……供給された現像剤。FIG. 1 is a perspective view mainly showing a stirrer according to the present invention, FIG. 2 is a cross-sectional view taken along line II of FIG. 1, and FIG. 3 is a perspective view mainly showing a conventional stirrer. . 10a, 10b: conveying screw, 12: container, 16: supply port, 28: supplied developer.
Claims (1)
に配設した一対の撹拌・搬送用の搬送スクリューと、容
器の上面に設けた現像剤供給用の現像剤供給口、とを含
む２成分現像剤の撹拌装置であって、 前記搬送スクリューは、その軸線が略同一水平面内に位
置し且つ相互平行に近接配置されて、互いに逆方向に回
転駆動され、 前記現像剤供給口は、前記搬送スクリューの間であり且
つ長手方向に関して略中間の位置に位置することを特徴
とする２成分現像剤の撹拌装置。A container capable of accommodating a two-component developer, a pair of conveying screws for stirring and conveying disposed in the container, and a developer supply port for supplying a developer provided on an upper surface of the container. Wherein the conveying screw has its axis positioned substantially in the same horizontal plane and is disposed in parallel and close to each other, and is driven to rotate in opposite directions, and the developer supply port is provided. Is a stirring device for a two-component developer, wherein the stirring device is located between the conveying screws and at a substantially middle position in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2283060A JP2628605B2 (en) | 1990-10-20 | 1990-10-20 | Stirring device for two-component developer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2283060A JP2628605B2 (en) | 1990-10-20 | 1990-10-20 | Stirring device for two-component developer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04157487A JPH04157487A (en) | 1992-05-29 |
| JP2628605B2 true JP2628605B2 (en) | 1997-07-09 |
Family
ID=17660687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2283060A Expired - Fee Related JP2628605B2 (en) | 1990-10-20 | 1990-10-20 | Stirring device for two-component developer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2628605B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02132476A (en) * | 1988-11-14 | 1990-05-21 | Konica Corp | Developing device |
-
1990
- 1990-10-20 JP JP2283060A patent/JP2628605B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04157487A (en) | 1992-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |