JPH0264583A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH0264583A JPH0264583A JP63215055A JP21505588A JPH0264583A JP H0264583 A JPH0264583 A JP H0264583A JP 63215055 A JP63215055 A JP 63215055A JP 21505588 A JP21505588 A JP 21505588A JP H0264583 A JPH0264583 A JP H0264583A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- transfer means
- main body
- developing device
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000032258 transport Effects 0.000 claims description 34
- 238000005192 partition Methods 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 21
- 238000013019 agitation Methods 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は，複写器等の画像形成装置における現像装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a developing device in an image forming apparatus such as a copying machine.
（従来の技術）
複写機等の画像形成装置における現像装置には着色顔料
であるトナーをいわゆるキャリアと呼ばれる鉄粉に混合
した２成分系の現像剤を使用するものがある．かかる現
像装置にはトナーとキャリアを十分に混合・攪拌し，該
混合・攪拌された現像剤を所定方向に移送する移送手段
が設けられている。(Prior Art) Some developing devices in image forming devices such as copying machines use a two-component developer in which toner, which is a colored pigment, is mixed with iron powder, which is called a carrier. Such a developing device is provided with a transport means for sufficiently mixing and stirring the toner and carrier and transporting the mixed and stirred developer in a predetermined direction.
以上の従来技術に係る現像装置を第８図により説明する
．第８図は現像装置の現像剤を攪拌・移送するための現
像剤攪拌装置回りの平断面図を示しており、図中１００
は上部から供給されたトナーをキャリアと混合・攪拌し
つつ、図中矢印の右方に現像剤を移送する第１移送手段
であり、該第１移送千段１００の一側には当該第１移送
手段１００から現像剤を受は取り更にトナーとキャリア
を混合・攪拌しつつ、図中矢印の左方に現像剤を移送し
て，再度該現像剤を第１移送手段ｌ００へ引き渡す第２
移送手段１０１が配設されている．第１，第２移送手段
Ｚｏｏ，１０１間には該第１，第２移送手段１００，ｌ
ｏｔでそれぞれ攪拌・移送される現像剤どうしの混合を
防止する仕切板１０２が設けられており、該仕切板１０
２両端部と現像装置本体側壁１１０，１１１間には第１
、第２移送手段１００，１０１間て現像剤を循環すべく
現像剤循環路１０３，１０４が設けられている。The developing device according to the above-mentioned prior art will be explained with reference to FIG. FIG. 8 shows a plan cross-sectional view of the area around the developer stirring device for stirring and transporting the developer in the developing device.
is a first transfer means that transfers the developer to the right of the arrow in the figure while mixing and stirring the toner supplied from the top with the carrier; A second step receives the developer from the transfer means 100, further mixes and stirs the toner and carrier, transfers the developer to the left of the arrow in the figure, and delivers the developer again to the first transfer means l00.
A transport means 101 is provided. Between the first and second transfer means Zoo, 101, the first and second transfer means 100, l
A partition plate 102 is provided to prevent mixing of the developers that are stirred and transferred at the ot.
2 and between the side walls 110 and 111 of the main body of the developing device.
, and the second transport means 100 and 101, developer circulation paths 103 and 104 are provided to circulate the developer.
また第２移送手段１０１の一側には現像スリーブ１０５
が配設され、該現像スリーブ１０５により第２移送手段
１０１にて搬送されつつある現像剤中のトナーのみが感
光ドラム等の記録媒体の方へ供給され、現像作業かなさ
れる．従って現像スリーブ１０５回りてはトナーの濃度
が低下し、キャリアの濃度が増加するため、第２移送手
段ｌｏｔではトナー濃度の低い現像剤をできるだけ早く
第１移送手段ｌＯＯに引き渡し、また第１移送千段１０
０からトナーの十分混合された現像剤をできるだけ早く
受けとる必要がある．このため一般に現像スリーブ１０
５に近接する第２移送手段ｌｏｔはトナー供給側の第１
移送手段ｌＯＯより現像剤の移送能力が大となっている
。Further, a developing sleeve 105 is provided on one side of the second transfer means 101.
is provided, and only the toner in the developer being transported by the second transport means 101 by the developing sleeve 105 is supplied to a recording medium such as a photosensitive drum, and a developing operation is performed. Therefore, as the developing sleeve 105 goes around, the toner concentration decreases and the carrier concentration increases. Therefore, the second transfer means lot transfers the developer with low toner concentration to the first transfer means lOO as soon as possible, and Step 10
It is necessary to receive a developer containing sufficient toner from zero as soon as possible. For this reason, generally the developing sleeve 10
The second transfer means lot adjacent to the toner supply side
The developer transporting capacity is greater than that of the transporting means lOO.
（ｉＰ１明が解決しようとする課題）
しかしながら、前記従来技術では仕切板１０２と現像装
置本体側壁１１０，１１１とで構成される２つの現像剤
循環路１０３，１０４の通路幅ｌｒ、１ｍが等しくなっ
ており、且つ第２移送手段１０１の現像剤移送能力が第
１移送手段のそれより大きいため、第２移送手段１０１
から第１移送手段１００へ現像剤を引き渡す現像剤循環
路１０４回りの現像装置本体側壁１１１付近に現像剤か
滞留し、該滞留により現像剤の一部が現像装置からあふ
れ、画像形成装置内を汚したり１画像を乱したりする不
都合があった。(Problem to be solved by iP1mei) However, in the prior art, the passage widths lr, 1 m, of the two developer circulation paths 103 and 104, which are composed of the partition plate 102 and the side walls 110 and 111 of the main body of the developing device, are not equal. In addition, since the developer transfer capacity of the second transfer means 101 is larger than that of the first transfer means, the second transfer means 101
The developer accumulates near the side wall 111 of the developing device main body around the developer circulation path 104 that transfers the developer from the developer to the first transfer means 100, and due to this accumulation, a part of the developer overflows from the developing device and flows inside the image forming device. There were inconveniences such as smudging or disturbing one image.
本発明は以上の問題に鑑みてなされたもので、その目的
とする処は、第１．第２移送手段によって攪拌・移送さ
れる現像剤の現像装置内での不要な滞留を無くし、現像
剤の滞留によって生じる不都合を無くさんとするもので
る。The present invention has been made in view of the above problems, and its objectives are as follows: This eliminates unnecessary retention of the developer stirred and transferred by the second transfer means within the developing device, thereby eliminating inconveniences caused by retention of the developer.
（課題を解決するための手段）
上記目的を達成すべく本発明は、装置本体の両側側壁に
両軸端が支持されて、互いに軸方向が平行に配設される
と共に、互いに軸方向異方向にトナーとキャリアとから
なる現像剤を攪拌、移送する第１．第２の移送手段と、
該移送手段間に移送中の現像剤の混合防止のために設け
られ、前記装置本体側壁間とで、トナー補給側に配設さ
れる第１の移送手段から現像スリーブ側に配設される第
２の移送手段側へ現像剤を移動させる第１の循環通路と
第２の移送手段側から第１の移送手段側へ現像剤を移動
させる第２の循環通路とを形成する仕切板とを有する現
像剤攪拌装置を備えた現像装置において、前記第２の循
環通路の大きさを前記第１の循環通路の大きさより大き
く構成したことであり、
又同様な第１、第２の移送手段と仕切板とを有する攪拌
装置を備えた現像装置において、第２の移送手段の第２
の循環通路に対向する部分に、現像剤を第１の移送手段
の方へ移送する補助移送手段を設けたことであり、
また同様な第１、第２の移送手段と仕切板とを有する攪
拌装置を備えた現像装置において、第２の移送手段の軸
心及びその下方の装置本体底壁を第１の移送手段の軸心
及びその下方の装置本体底壁よりも高く配設したことで
あり。(Means for Solving the Problems) In order to achieve the above object, the present invention provides an apparatus in which both shaft ends are supported by both side walls of a device main body, the shaft directions are arranged parallel to each other, and the shaft ends are disposed in parallel to each other, and the shaft ends are arranged in opposite directions in the shaft direction. The first step is to stir and transport the developer consisting of toner and carrier. a second transport means;
A first transfer means provided on the toner replenishing side and a second transfer means provided on the developing sleeve side are provided between the transfer means to prevent mixing of developer during transfer, and between the side walls of the apparatus main body. a partition plate forming a first circulation path for moving the developer to the second transfer means side and a second circulation path for moving the developer from the second transfer means side to the first transfer means side. In the developing device equipped with a developer stirring device, the size of the second circulation passage is larger than the size of the first circulation passage, and the first and second transfer means and partitions are similar. In the developing device equipped with an agitation device having a plate, the second
An auxiliary transfer means for transferring the developer toward the first transfer means is provided in a portion facing the circulation path of the agitator. In the developing device equipped with the device, the axis of the second transfer means and the bottom wall of the device main body below the second transfer means are arranged higher than the axis of the first transfer means and the bottom wall of the device main body below the second transfer means. .
更に同様な第１、第２の移送手段と仕切板とを有する攪
拌装置を備えた現像装置において、仕切板を装置本体の
両側側壁位置まで配設し、前記第１、第２の循環通路を
仕切板の両端部上部を切り欠いて形成すると共に、第２
の循環通路に３ける装置本体の底壁から仕切板上端部ま
での距離を第１の循環通路におけるその距離よりも小さ
く形成したことである。Furthermore, in a developing device equipped with a stirring device having similar first and second transfer means and a partition plate, the partition plates are disposed up to the positions of both side walls of the main body of the device, and the first and second circulation passages are connected to each other. The upper part of both ends of the partition plate is cut out, and the second
The distance from the bottom wall of the apparatus main body to the upper end of the partition plate in the third circulation passage is made smaller than the distance in the first circulation passage.
（作用）
現像剤は現像剤移送能力の大きい現像スリーブ側の第２
の移送手段と、該第２移送手段より移送能力の小さい第
１移送手段とにより、第１、第２の循環通路を通って現
像装置内を循環することとなるが１例えば第２の移送手
段側から第１の移送手段側への現像剤の第２の循環通路
の大きさを第１の移送手段側から第２の移送手段側への
現像剤の第１の循環通路の大きさより大きく構成たため
、現像剤は第２の循環通路回りで滞留することなくスム
ーズに循環する。(Function) The developer is transferred to the second part on the developing sleeve side, which has a large developer transfer capacity.
The first transfer means, which has a smaller transfer capacity than the second transfer means, circulate within the developing device through the first and second circulation passages. The size of the second circulation path for developer from the side to the first transfer means side is configured to be larger than the size of the first circulation path for developer from the first transfer means side to the second transfer means side. Therefore, the developer circulates smoothly around the second circulation path without being stagnant.
（実施例）
以下に本発明の実施例を複写機の現像装置を例にとり説
明する。(Example) Examples of the present invention will be described below by taking a developing device of a copying machine as an example.
まず本発明の第１実施例を第１図に従って説明する。第
１図は現像装２ｔｌの現像剤攪拌装置回りの平断面図を
示すものであるが、図中１１．１２はその左右の両端部
が現像装置装置の本体側壁２０．２１に枢支されたスク
リュータイプの現像剤用の第１、第２移送手段であり、
該第１．第２移送手段１１．１２は現像剤中の着色顔料
であるトナーと、いわゆるキャリアと呼ばれる鉄粉とを
混合・攪拌すると共に、これ等を現像装置ｌ内に移送循
環させるものである。また第１、第２移送手段１１．１
２間には現像装ａｌｌの不図示の本体底壁より突出して
設けられる仕切板１３が配設され、第１、第２移送手段
１１．１２でそれぞれ移送等がなされる現像剤が相互に
混合するのを防止している、また前記仕切板１３の図中
右端と右側の本体側壁２０間に通路幅ＩＬｔの現像剤用
第１ｖａ環通路１５が設けられ、仕切板１３の左端と左
側の本体側壁２１間に通路幅Ａｍの現像剤用第２循環通
路１６が設けられている。First, a first embodiment of the present invention will be described with reference to FIG. Figure 1 shows a plan cross-sectional view of the developer stirring device of a 2 tl developing device. first and second transport means for screw type developer;
Part 1. The second transport means 11, 12 mixes and stirs the toner, which is a colored pigment in the developer, and iron powder, which is called a carrier, and transports and circulates them into the developing device 1. In addition, the first and second transport means 11.1
A partition plate 13 that protrudes from the bottom wall of the main body (not shown) of the developing device all is disposed between the two, and the developer that is transferred by the first and second transfer means 11 and 12 is mixed with each other. A first va ring passage 15 for developer having a passage width ILt is provided between the right end of the partition plate 13 in the figure and the right side wall 20 of the main body to prevent the left end of the partition plate 13 from A second developer circulation passage 16 having a passage width Am is provided between the side walls 21 .
即ち、第１移送手段１１が図中矢印の方向に回転して、
現像剤を図中右方のＡ方向に混合・攪拌しつつ移送し、
第２移送手段１２が図中矢印方向に回転し、現像剤を図
中左方のＢ方向に混合・攪拌しつつ移送するため、現像
剤は第１移送手段１１に沿いつつＡ方向に進んだ後、第
１′＠環通路１５を経て第２移送手段１２に沿いつつＢ
方向に進み、その後第２ＷＪ環通路１６を経て再度第１
移送手段１１に戻されて現像ｖｃ置ｌ内を循環すること
となる。That is, the first transfer means 11 rotates in the direction of the arrow in the figure,
The developer is transferred in the A direction on the right side of the figure while being mixed and stirred.
The second transfer means 12 rotates in the direction of the arrow in the figure and transfers the developer in the B direction on the left in the figure while mixing and stirring, so the developer moves in the A direction along the first transfer means 11. After that, B goes along the second transfer means 12 via the 1st @ ring passage 15.
direction, then pass through the second WJ ring passage 16 and return to the first
The toner is returned to the transport means 11 and circulated within the developing vc station l.
一方第２移送手段１２の一側には、その両端部が前記本
体側板２０．２１に支持され、感光ドラムに形成された
静電潜像にトナーを供給して、該静電潜像を顕像化する
ための現像スリーブ１４が配設されている。ここで現像
スリーブ１４により現像剤中のトナーが消費されるため
、現像スリーブ１４回りの現像剤のトナー濃度は低下し
、逆にキャリアの濃度が増加することとなる。従って現
像スリーブ１４回りの現像剤はできるだけ早く循環させ
、トナーを十分に含む新たな現像剤と置換してやる必要
がある。このため第２移送手段１２の移送能力は第１移
送手段１１より大きく設計されている。On the other hand, on one side of the second transfer means 12, both ends thereof are supported by the main body side plate 20.21, and supplies toner to the electrostatic latent image formed on the photosensitive drum to make the electrostatic latent image visible. A developing sleeve 14 for imaging is provided. Here, since the toner in the developer is consumed by the developing sleeve 14, the toner concentration of the developer around the developing sleeve 14 decreases, and conversely, the carrier concentration increases. Therefore, it is necessary to circulate the developer around the developing sleeve 14 as quickly as possible and replace it with new developer containing sufficient toner. Therefore, the transfer capacity of the second transfer means 12 is designed to be larger than that of the first transfer means 11.
而して、図中第１移送手段１１の上方から新たなトナー
が補給されると、この第１移送手段１１によりトナーと
キャリアが混合・攪拌されつつ現像剤は第１循環通路１
５まで運ばれ、その後現像剤は第２移送手段１２で混合
・攪拌されつつ、且つ現像スリーブ１４近傍でトナーが
消費されつつ第２ＷＪ環通路１６まで運ばれる。ここで
第２移送手段１２の現像剤移送能力は第１移送手段１１
のそれより大きいため前記第２循環通路１６を通る現像
剤の搬送が問題となる。即ち、第２移送手段１２では現
像剤を大量に第１移送手段１１の方へ送り込もうとする
が、第１移送手段１１の能力に限度がるため、現像剤は
どうしても第１図中第２循環通路１６回りの本体側壁２
１付近に滞留しようとする。一方第１循環通路１５につ
いては以上と全く逆のことが生じるため以上の如き問題
は生じない。When new toner is replenished from above the first transport means 11 in the figure, the toner and carrier are mixed and stirred by the first transport means 11 and the developer is transferred to the first circulation path 1.
Thereafter, the developer is transported to the second WJ ring passage 16 while being mixed and stirred by the second transport means 12 and the toner is consumed near the developing sleeve 14. Here, the developer transfer ability of the second transfer means 12 is equal to that of the first transfer means 11.
Since it is larger than that of the second circulation passage 16, transporting the developer through the second circulation passage 16 becomes a problem. That is, the second transport means 12 attempts to send a large amount of developer toward the first transport means 11, but since the capacity of the first transport means 11 is limited, the developer inevitably flows in the direction shown in FIG. 2 Main body side wall 2 around circulation passage 16
Try to stay around 1. On the other hand, with respect to the first circulation passage 15, the exact opposite of the above occurs, so the above-mentioned problem does not occur.
そこで本実施例では第１．第２移送手段１１゜１２の現
像剤移送能力に合せ第２１１環通路幅１ｍを第１循環通
路幅１＋より大きくした。このことにより第２＠環通路
１６回りの本体側壁２１付近に現像剤が滞留することは
なく、また第１循環通路１５回りについても現像剤の滞
留は生じない。Therefore, in this embodiment, the first. The width of the 211th ring passage (1 m) was made larger than the width of the first circulation passage (1+) in accordance with the developer transfer capacity of the second transfer means 11°12. As a result, the developer does not accumulate near the main body side wall 21 around the second annular passage 16, and the developer does not accumulate around the first circulation passage 15 either.
従って現像剤の滞留によつて現像剤の一部が現像装置ｌ
からあふれ、画像形Ｔ１を装置内を汚したり１画像を乱
したりする不都合はない。Therefore, due to the retention of the developer, a portion of the developer is transferred to the developing device l.
There is no problem of overflowing the image form T1, contaminating the inside of the apparatus, or disturbing one image.
次に本発明の第２実施例を第２５！Ｉに従って説明する
。該第２図も第１図の第１実施例と同様に、現像装！１
２の現像剤攪拌装置回りの平断面図を示すものて、その
構成はＭｌ実施例とほぼ同一であるため、該第１実施例
と共通部分については第１図に付したと同一番号を付し
、それらについての説明は省略する。尚以降の実施例に
ついても各実施例で一旦説明した事項について、その後
共通部分がでてきた場合は前に説明ずみの図面と同一番
号を付し、その説明を省略する。Next, the second embodiment of the present invention will be described in the 25th! I will explain according to I. Similarly to the first embodiment shown in FIG. 1, FIG. 2 also includes a developing device! 1
This figure shows a plan cross-sectional view of the developer agitating device in Figure 2. Since its configuration is almost the same as that of the Ml embodiment, parts common to the first embodiment are designated by the same numbers as in Figure 1. However, their explanation will be omitted. It should be noted that in the following embodiments, when common parts appear afterward with respect to matters once explained in each embodiment, the same numbers as those in the previously explained drawings are given, and the explanation thereof will be omitted.
本実施例においては現像剤の第１．第２ＷＪ環通路１５
．１６の通路幅ｆＬ１．１２は等しくなっているが、第
２移送手段１２の第２循環通路１６側のスクリュ一部１
２ａに第２移送手段１２の軸方向に現像剤攪拌用のフィ
ン１２ｂ（現像剤の補助移送手段）を設けている。この
ことにより、第２循環通路１６回りに滞留仕勝ちな現像
剤を前記フィン１２ｂにより第１移送手段１１の方へ強
制的に移送できることとなり、第２１１環通路１６回り
に現像剤の滞留は生じず、本実施例においても第１実施
例と全く同様な同様な効果を得ることがてきる。尚本実
施例においては第１、第２循環通路幅１＝、ｌｘは等し
いとしたが、フィン１２ｂの能力範囲において通路幅１
ｘ、ｆｔｔに大きさの差かあってもよいのは勿論である
。In this embodiment, the first . 2nd WJ ring passage 15
．． 16 have the same passage width fL1.12, but the screw portion 1 on the second circulation passage 16 side of the second transfer means 12
Fins 12b (auxiliary developer transport means) for stirring the developer are provided in the axial direction of the second transport means 12 at 2a. As a result, the developer that tends to stay around the second circulation passage 16 can be forcibly transferred to the first transfer means 11 by the fins 12b, and the developer will not stay around the 211th ring passage 16. First, the same effects as in the first embodiment can be obtained in this embodiment as well. In this embodiment, it is assumed that the first and second circulation passage widths 1=, lx are equal, but within the capacity range of the fins 12b, the passage width 1
Of course, there may be a difference in size between x and ftt.
次に本発明の第３実施例を第３図及び第４因により説明
する。第３図は現像装置３回りの側断面図（第４図のＩ
−Ｉ矢視図）であり、第４図は現像装置３の現像剤攪拌
装置回りの平断面図を示している。現像装置３の現像剤
攪拌装置回りの平断面については第２実施例のそれと全
く同一であるが、本実施例においては第３図で示される
如く第２移送手段１２の軸心の位置を第１移送手段１１
の軸心の位置よりＣたけ上方に高くし、これにともない
、本体底壁２２についても第２移送手段１１側底壁２２
ａを第１移送手段１１側底壁２２ｂよりその分高くして
いる。尚、第３図中１７はトナー補給装置、１８はトナ
ー補給口、３０は感光ドラムである。Next, a third embodiment of the present invention will be explained with reference to FIG. 3 and the fourth factor. Figure 3 is a side sectional view of the developing device 3 (I in Figure 4).
-I arrow view), and FIG. 4 shows a plan cross-sectional view of the area around the developer stirring device of the developing device 3. The planar section around the developer agitating device of the developing device 3 is exactly the same as that of the second embodiment, but in this embodiment, the position of the axis of the second transfer means 12 is changed as shown in FIG. 1 Transport means 11
Accordingly, the bottom wall 22 of the main body 22 is also raised above the axis of the second transfer means 11.
a is made higher than the side bottom wall 22b of the first transfer means 11 by that amount. In FIG. 3, 17 is a toner replenishing device, 18 is a toner replenishing port, and 30 is a photosensitive drum.
以上の構成により、本実施例においても第２移送手段１
２のフィン１２ｂにより第２実施例と同様の作用、効果
を得ることができるが１本実施例では更に第１、第２移
送手段１１．１２及び本体底壁２２ａ、２２ｂ間に段差
を設けているため第２移送手段１２側から第１移送手段
１１側へは現像剤が重力作用で容易に移動でき、第２実
施例より更に大きな作用、効果を得ることができ、且つ
第１、第２ ”Ｏａｍ通Ｗａ ｌ ５ 、 ｌ ６ ｆ
）ｍ路ｍ ｌ １． ｎ ｔの大小関係に拘わらず第１
実施例と同様の効果を得ることかできる。尚、本実施例
において第２移送手段にフィン１２ｂを設けない場合に
おいても第１実施例と同様な効果を得ることができるの
は勿論である。With the above configuration, also in this embodiment, the second transfer means 1
The same functions and effects as in the second embodiment can be obtained by using the second fin 12b, but in this embodiment, a step is further provided between the first and second transfer means 11.12 and the bottom walls 22a and 22b of the main body. Therefore, the developer can be easily moved from the second transfer means 12 side to the first transfer means 11 side by the action of gravity. ``Oam Tsu Wal 5, l 6 f
) m path m l 1. Regardless of the size of n t, the first
It is possible to obtain the same effects as in the embodiment. It goes without saying that the same effects as in the first embodiment can be obtained even when the second transfer means is not provided with the fins 12b in this embodiment.
次に本発明の第４実施例を第５図乃至第７図により説明
する。第５図は現像装置４の側断面図（第７図の■−■
矢視図）、第６図は現像装置４の側断面図（第７図のｍ
−■矢視図）、第７図は現像装置の現像剤攪拌装置回り
の平断面図を示している０本実施例では、第１実施例と
比較して、第７図に示される如く仕切板１３を本体側壁
２０゜２１間全域に渡って設け、仕切板１３の左右両端
部にそれぞれ大きさの異なる切欠きを設けて、現像剤の
第１、第２循環通路１５．１６を形成している。そして
第２循環通路１６における仕切板１３の切欠高さを第１
循環通路１５における仕切板１３の切欠高さより大きく
構成する。尚、この場合説明を解り易くするため第１．
第２循環通路１５．１６の通路幅、即ち仕切板１３の切
欠幅１＋、装置は等しいと考える。従って第２循環通路
１６における仕切板上端１３ｂの本体底壁２２からの高
さＨ（第６図参照）より第１循環通路１５における仕切
板上端１３ａの本体底壁２２からの高さＧ（第５図参照
）が大きくなっている。Next, a fourth embodiment of the present invention will be described with reference to FIGS. 5 to 7. FIG. 5 is a side sectional view of the developing device 4 (■-■ in FIG. 7).
Fig. 6 is a side sectional view of the developing device 4 (Fig.
7 is a plan cross-sectional view of the area around the developer agitating device of the developing device. In this embodiment, compared to the first embodiment, the partitions are A plate 13 is provided over the entire area between the side walls 20 and 21 of the main body, and cutouts of different sizes are provided at both left and right ends of the partition plate 13 to form first and second circulation passages 15 and 16 for the developer. ing. Then, the notch height of the partition plate 13 in the second circulation passage 16 is set to the first height.
The notch height of the partition plate 13 in the circulation passage 15 is configured to be larger. In this case, in order to make the explanation easier to understand, the first.
The passage width of the second circulation passage 15, 16, that is, the notch width of the partition plate 13, 1+, is considered to be equal in the apparatus. Therefore, the height H of the upper end 13b of the partition plate in the second circulation passage 16 from the bottom wall 22 of the main body (see FIG. 6) is greater than the height G of the upper end 13a of the partition plate in the first circulation passage 15 from the bottom wall 22 of the main body (see (see Figure 5) has become larger.
従って第２循環通路１６中を第２移送手段１２から第１
移送手段１１まで現像剤が移送される流動抵抗より、第
１循環通路１５中を第１移送手段１１から第２移送手段
１２まで現像剤が移送される流動抵抗の方が大となるた
め、第２移送手段１２による現像剤の移送能力が第１移
送手段１１のそれより大きくても第１、第２循環通路１
５゜１６で現像剤が滞留することはなく、第１実施例と
同様な効果を得ることができる。尚、仕切板１３の切欠
幅１ｒ、ｌ＊が異な場合は、仕切板１３の切欠高さを必
要により調整すればよい。Therefore, in the second circulation passage 16, from the second transfer means 12 to the first
The flow resistance for the developer to be transferred from the first transfer means 11 to the second transfer means 12 in the first circulation path 15 is greater than the flow resistance for the developer to be transferred to the transfer means 11. Even if the developer transport capacity of the second transport means 12 is greater than that of the first transport means 11, the first and second circulation passages 1
At 5°16, the developer does not stagnate, and the same effect as in the first embodiment can be obtained. Note that if the notch widths 1r and l* of the partition plate 13 are different, the notch height of the partition plate 13 may be adjusted as necessary.
ここで以上の第１実施例から第４実施例においては第１
、第２移送手段１１．１２をスクリュータイプとしたか
、これにこだわる必要はなく同様の作用をする移送手段
であれば他のタイプでもよいのは勿論である。また仕切
板１３は本体側壁２０．２１や本体底壁２２の如き本体
部材とは別部材の如く説明しであるが、本体部材と同一
部材であってもよいのは勿論である。更に現像剤は２成
分系のものを用いる場合について説明しているか、現像
剤の第１移送手段１１と第２移送手段１２との間に現像
剤の移送能力に同様な差を持たせているものであるなら
ば、本発明はトナーのみの１成分系の現像剤を用いる現
像装置にも適用できることは勿論である。Here, in the above first to fourth embodiments, the first
Although the second transfer means 11 and 12 are of a screw type, it is not necessary to be particular about this, and it is of course possible to use other types of transfer means as long as they have the same effect. Further, although the partition plate 13 is described as being a separate member from main body members such as the main body side walls 20, 21 and the main body bottom wall 22, it goes without saying that it may be the same member as the main body members. Furthermore, the description is based on the case where a two-component developer is used, or a similar difference is provided in the developer transfer ability between the first developer transfer means 11 and the second transfer means 12. Of course, the present invention can also be applied to a developing device using a one-component developer containing only toner.
（発明の効果）
以上の説明で明らかな如く本発明によれば、現像剤が第
２の循環通路を通る場合の現像剤の流動抵抗等を現像剤
が第１の循環通路を通る場合の現像剤の流動抵抗等より
小さくしているため、第２の移送手段の現像剤移送能力
か第１の移送手段のそれより大きくても、現像剤は第２
の循環通路口りに滞留することはなく、現像剤のスムー
ズな循環、移送を行うことができる。従って現像剤が現
像装置からあふれて、画像形成装置内を汚したり１画像
を乱したりする不都合は生じない。(Effects of the Invention) As is clear from the above description, according to the present invention, the flow resistance of the developer when the developer passes through the second circulation passage, etc., can be reduced during the development when the developer passes through the first circulation passage. Since the flow resistance of the developer is smaller than that of the second transfer means, even if the developer transfer capacity of the second transfer means is greater than that of the first transfer means, the developer will flow through the second transfer means.
The developer can be smoothly circulated and transferred without being accumulated at the opening of the circulation passage. Therefore, there is no problem that the developer overflows from the developing device, staining the inside of the image forming device or disturbing one image.
第１図は第１実施例に係る現像装置の現像剤攪拌装置回
りの平断面図、第２図は第２実施例に係る同図、第３図
は第３実施例に係る現像装置回りの側断面図（第４図の
Ｉ−Ｉ矢視図）、第４図は同現像装置の現像剤攪拌装置
回りの平断面図、第５図は第４実施例に係る現像装置回
りの側断面図（第７図の■−■矢視図）、第６図は同現
像装置の現像装置回りの側断面図（第７図の■−■矢視
図）、第７図は同現像装置の現像剤攪拌装置回りの平断
面図、第８図は従来技術を示す図である。
１．２．３・・・現像装置、１１・・・第１移送手段、
１２−・・第２移送手段、１２ｂ・・・フィン（補助移
送手段）、１３・・・仕切板、１４−・・現像スリーブ
。
１５・・・第１１環通路、１６−・・第２Ｉｉ環通路、
２０．２１−・・装置本体側壁
第８図FIG. 1 is a plan cross-sectional view of the area around the developer stirring device of the developing device according to the first embodiment, FIG. 2 is the same view of the second embodiment, and FIG. A side sectional view (I-I arrow view in FIG. 4), FIG. 4 is a plan sectional view around the developer stirring device of the same developing device, and FIG. 5 is a side sectional view around the developing device according to the fourth embodiment. Figure 6 is a side cross-sectional view of the developing device around the developing device (cross-sectional view of the developing device in Figure 7); FIG. 8, which is a plan sectional view of the area around the developer stirring device, is a diagram showing the prior art. 1.2.3...Developing device, 11...First transport means,
12--Second transfer means, 12b--Fin (auxiliary transfer means), 13--Partition plate, 14--Developing sleeve. 15... 11th ring passage, 16-... 2nd Ii ring passage,
20.21--Device main body side wall Figure 8
Claims (7)
に軸方向が平行に配設されると共に、互いに軸方向異方
向にトナーとキャリアとからなる現像剤を攪拌、移送す
る第１、第２の移送手段と、該移送手段間に移送中の現
像剤の混合防止のために設けられ、前記装置本体側壁間
とで、トナー補給側に配設される第１の移送手段から現
像スリーブ側に配設される第２の移送手段側へ現像剤を
移動させる第１の循環通路と第２の移送手段側から第１
の移送手段側へ現像剤を移動させる第２の循環通路とを
形成する仕切板とを有する現像剤攪拌装置を備えた現像
装置において、前記第２の循環通路の大きさを前記第１
の循環通路の大きさより大きく構成したことを特徴とす
る現像装置。(1) Both shaft ends are supported by both side walls of the apparatus main body, and the first shaft is disposed parallel to each other in the axial direction, and stirs and transfers the developer consisting of toner and carrier in mutually different axial directions. , is provided to prevent mixing of the developer being transferred between the second transfer means and the transfer means, and between the side wall of the apparatus main body, the developer is transferred from the first transfer means disposed on the toner replenishing side to the side wall of the apparatus main body. A first circulation path for moving the developer to the second transfer means side disposed on the sleeve side, and a first circulation path for moving the developer from the second transfer means side to the second transfer means side disposed on the sleeve side.
In the developing device, the size of the second circulation passage is set to be the same as that of the first circulation passage.
A developing device characterized in that the size of the developing device is larger than that of the circulation passage.
に軸方向が平行に配設されると共に、互いに軸方向異方
向にトナーとキャリアとからなる現像剤を撹拌、移送す
る第１、第２の移送手段と、該移送手段間に移送中の現
像剤の混合防止のために設けられ、前記装置本体側壁間
とで、トナー補給側に配設される第１の移送手段から現
像スリーブ側に配設される第２の移送手段側へ現像剤を
移動させる第１の循環通路と第２の移送手段側から第１
の移送手段側へ現像剤を移動させる第２の循環通路とを
形成する仕切板とを有する現像剤攪拌装置を備えた現像
装置において、前記第２の移送手段の第２の循環通路に
対向する部分に、現像剤を第１の移送手段の方へ移送す
る補助移送手段を設けたことを特徴とする現像装置。(2) Both shaft ends are supported by both side walls of the apparatus main body, and the first shaft is disposed parallel to each other in the axial direction, and stirs and transfers the developer consisting of toner and carrier in mutually different axial directions. , is provided to prevent mixing of the developer being transferred between the second transfer means and the transfer means, and between the side wall of the apparatus main body, the developer is transferred from the first transfer means disposed on the toner replenishing side to the side wall of the apparatus main body. A first circulation path for moving the developer to the second transfer means side disposed on the sleeve side, and a first circulation path for moving the developer from the second transfer means side to the second transfer means side disposed on the sleeve side.
A developing device including a developer stirring device having a partition plate forming a second circulation passage for moving the developer to the transfer means side of the second transfer means, the developer agitation device having a partition plate that faces the second circulation passage of the second transfer means. A developing device characterized in that a portion thereof is provided with auxiliary transport means for transporting the developer toward the first transport means.
に軸方向が平行に配設されると共に、互いに軸方向異方
向にトナーとキャリアとからなる現像剤を攪拌、移送す
る第１、第２の移送手段と、該移送手段間に移送中の現
像剤の混合防止のために設けられ、前記装置本体側壁間
とで、トナー補給側に配設される第１の移送手段から現
像スリーブ側に配設される第２の移送手段側へ現像剤を
移動させる第１の循環通路と第２の移送手段側から第１
の移送手段側へ現像剤を移動させる第２の循環通路とを
形成する仕切板とを有する現像剤攪拌装置を備えた現像
装置において、前記第２の移送手段の軸心及びその下方
の装置本体底壁を第１の移送手段の軸心及びその下方の
装置本体底壁よりも高く配設したことを特徴とする現像
装置。(3) A first shaft whose both shaft ends are supported by both side walls of the apparatus main body, and whose axial directions are parallel to each other, and which stirs and transports the developer consisting of toner and carrier in mutually different axial directions. , is provided to prevent mixing of the developer being transferred between the second transfer means and the transfer means, and between the side wall of the apparatus main body, the developer is transferred from the first transfer means disposed on the toner replenishing side to the side wall of the apparatus main body. A first circulation path for moving the developer to the second transfer means side disposed on the sleeve side, and a first circulation path for moving the developer from the second transfer means side to the second transfer means side disposed on the sleeve side.
In a developing device equipped with a developer agitating device having a partition plate forming a second circulation passage for moving the developer toward the transfer means side, the axis of the second transfer means and the device body below the second circulation path are provided. A developing device characterized in that a bottom wall is disposed higher than the axis of the first transfer means and the bottom wall of the main body of the device below the axis.
に軸方向が平行に配設されると共に、互いに軸方向異方
向にトナーとキャリアとからなる現像剤を攪拌、移送す
る第１、第２の移送手段と、該移送手段間に移送中の現
像剤の混合防止のために設けられ、前記装置本体側壁間
とで、トナー補給側に配設される第１の移送手段から現
像スリーブ側に配設される第２の移送手段側へ現像剤を
移動させる第１の循環通路と第２の移送手段側から第１
の移送手段側へ現像剤を移動させる第２の循環通路とを
形成する仕切板とを有する現像剤攪拌装置を備えた現像
装置において、前記仕切板を装置本体の両側側壁位置ま
で配設し、前記第１、第２の循環通路を仕切板の両端部
上部を切り欠いて形成すると共に、第２の循環通路にお
ける装置本体の底壁から仕切板上端部までの距離を第１
の循環通路におけるその距離よりも小さく形成したこと
を特徴とする現像装置。(4) A first shaft whose both shaft ends are supported by both side walls of the apparatus main body, and whose axial directions are parallel to each other, and which stirs and transports the developer consisting of toner and carrier in mutually different axial directions. , is provided to prevent mixing of the developer being transferred between the second transfer means and the transfer means, and between the side wall of the apparatus main body, the developer is transferred from the first transfer means disposed on the toner replenishing side to the side wall of the apparatus main body. A first circulation path for moving the developer to the second transfer means side disposed on the sleeve side, and a first circulation path for moving the developer from the second transfer means side to the second transfer means side disposed on the sleeve side.
In a developing device equipped with a developer agitating device having a partition plate forming a second circulation passage for moving the developer to the transfer means side of the device, the partition plate is disposed up to the position of both side walls of the device main body, The first and second circulation passages are formed by cutting out the upper part of both ends of the partition plate, and the distance from the bottom wall of the device main body to the upper end of the partition plate in the second circulation passage is set to the first
A developing device characterized in that the distance is smaller than the distance in the circulation path of the developing device.
移送手段としたことを特徴とする請求項１乃至４記載の
現像装置。(5) The developing device according to any one of claims 1 to 4, wherein the first and second transport means are screw type transport means.
特徴とする前記請求項１乃至５記載の現像装置。(6) The developing device according to any one of claims 1 to 5, wherein the partition plate is formed integrally with the main body of the device.
つ前記第２の移送手段の移送能力を第１の移送手段の移
送能力より大きく構成したことを特徴とする請求項１乃
至６記載の現像装置。(7) Claims 1 to 6 characterized in that the developer is a one-component developer containing only toner, and the transport capacity of the second transport means is larger than the transport capacity of the first transport means. developing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63215055A JP2635709B2 (en) | 1988-08-31 | 1988-08-31 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63215055A JP2635709B2 (en) | 1988-08-31 | 1988-08-31 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0264583A true JPH0264583A (en) | 1990-03-05 |
| JP2635709B2 JP2635709B2 (en) | 1997-07-30 |
Family
ID=16666016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63215055A Expired - Fee Related JP2635709B2 (en) | 1988-08-31 | 1988-08-31 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2635709B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04106570A (en) * | 1990-08-27 | 1992-04-08 | Sharp Corp | Developing device |
| JPH05197283A (en) * | 1992-01-20 | 1993-08-06 | Fujitsu Ltd | Developing device for electrophotographic device |
| US6035168A (en) * | 1998-01-09 | 2000-03-07 | Sharp Kabushiki Kaisha | Developing device having a reduced width in the horizontal direction |
| JP2012008257A (en) * | 2010-06-23 | 2012-01-12 | Sharp Corp | Developer conveyance device, development apparatus having it, toner cartridge and cleaning unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6235367U (en) * | 1985-08-21 | 1987-03-02 | ||
| JPS62226172A (en) * | 1986-03-27 | 1987-10-05 | Minolta Camera Co Ltd | Electrostatic latent image developing device |
| JPS6382260U (en) * | 1986-11-18 | 1988-05-30 | ||
| JPS63146073A (en) * | 1986-12-10 | 1988-06-18 | Canon Inc | Developing device |
| JPS63189877A (en) * | 1987-01-31 | 1988-08-05 | Toshiba Corp | Developing device |
-
1988
- 1988-08-31 JP JP63215055A patent/JP2635709B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6235367U (en) * | 1985-08-21 | 1987-03-02 | ||
| JPS62226172A (en) * | 1986-03-27 | 1987-10-05 | Minolta Camera Co Ltd | Electrostatic latent image developing device |
| JPS6382260U (en) * | 1986-11-18 | 1988-05-30 | ||
| JPS63146073A (en) * | 1986-12-10 | 1988-06-18 | Canon Inc | Developing device |
| JPS63189877A (en) * | 1987-01-31 | 1988-08-05 | Toshiba Corp | Developing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04106570A (en) * | 1990-08-27 | 1992-04-08 | Sharp Corp | Developing device |
| JPH05197283A (en) * | 1992-01-20 | 1993-08-06 | Fujitsu Ltd | Developing device for electrophotographic device |
| US6035168A (en) * | 1998-01-09 | 2000-03-07 | Sharp Kabushiki Kaisha | Developing device having a reduced width in the horizontal direction |
| JP2012008257A (en) * | 2010-06-23 | 2012-01-12 | Sharp Corp | Developer conveyance device, development apparatus having it, toner cartridge and cleaning unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2635709B2 (en) | 1997-07-30 |
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