JPH0155454B2 - - Google Patents
Info
- Publication number
- JPH0155454B2 JPH0155454B2 JP58009950A JP995083A JPH0155454B2 JP H0155454 B2 JPH0155454 B2 JP H0155454B2 JP 58009950 A JP58009950 A JP 58009950A JP 995083 A JP995083 A JP 995083A JP H0155454 B2 JPH0155454 B2 JP H0155454B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- auger
- toner
- axial direction
- housing
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明はトナーとキヤリアより成る二成分現像
剤を用いる現像機の現像剤撹拌装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developer stirring device for a developing machine that uses a two-component developer consisting of toner and carrier.
トナーとキヤリアより成る二成分現像剤を用い
る現像機においては、トナーとキヤリアの混合
比、混合状態が画質に大きな影響を及ぼす。 In a developing machine that uses a two-component developer consisting of toner and carrier, the mixing ratio and mixing state of toner and carrier have a large effect on image quality.
例えば、トナー濃度が軸方向（つまり現像ロー
ルの軸方向）に不揃いとなると感材の画像が軸方
向に不均一となつて均一なるコピーが得られな
い。 For example, if the toner density is uneven in the axial direction (that is, in the axial direction of the developing roll), the image on the photosensitive material becomes uneven in the axial direction, making it impossible to obtain a uniform copy.
また、現像剤中へのトナー補給量のバラツキに
より現像剤中のトナー量が急に増大するとトナー
とキヤリアが十分に混合されずに帯電量が十分で
ないトナーが現像領域に運ばれて感材の背景部に
付着しコピーにかぶり現像が生じてしまう。 Additionally, if the amount of toner in the developer suddenly increases due to variations in the amount of toner supplied to the developer, the toner and carrier will not be mixed sufficiently, and the toner with insufficient charge will be carried to the development area, causing the photosensitive material to be damaged. It adheres to the background area and causes fogging on the copy.
このために、トナーとキヤリアを撹拌する各種
撹拌装置が提案されているが十分満足する結果が
得られないと共に、トナー補給に際してはトナー
供給量を軸方向に均一としなければならずその手
段が複雑となりかつ十分満足する結果が得られる
手段が提案されていない。 To this end, various types of stirring devices have been proposed to stir the toner and carrier, but they have not produced satisfactory results, and when replenishing toner, the amount of toner supplied must be uniform in the axial direction, which requires complicated methods. No means have been proposed that would yield a sufficiently satisfactory result.
つまり、従来の現像機においては現像後の現像
剤を現像機のハウジング内に直接落下させると共
に、トナー補給もハウジング内の現像剤に直接供
給しているので、トナーとキヤリアの混合、撹拌
が困難であると共に、トナー供給に際しては軸方
向均一性が厳しく要求されるから前述のような不
具合が生じてしまう。 In other words, in conventional developing machines, the developer after development is dropped directly into the housing of the developing machine, and toner is also supplied directly to the developer in the housing, making it difficult to mix and stir the toner and carrier. In addition, since uniformity in the axial direction is strictly required when toner is supplied, the above-mentioned problems occur.
本発明は上記の事情に鑑みなされたものであ
り、その目的は現像機の現像剤を搬送、混合専用
室で混合、撹拌した後に現像機のハウジングに搬
入することによつてトナーとキヤリアを十分に混
合、撹拌できるように現像機の現像剤撹拌装置を
提供することである。 The present invention was made in view of the above circumstances, and its purpose is to transport the developer of the developing machine, mix it in a dedicated mixing chamber, stir it, and then transport it into the housing of the developing machine, thereby sufficiently mixing toner and carrier. To provide a developer stirring device for a developing machine so that developer can be mixed and stirred.
以下図面を参照して本発明の実施例を説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は斜視図であり、ドラム状の感材１と対
向して現像機Ａのハウジング２が設けられ、ハウ
ジング２は略Ｕ字状に彎曲した底壁２ａとその両
側開口部を覆う一対の側壁２ｂとを備え、一対の
側壁２ｂ間に亘つて一対の現像ロール３1，３2と
搬送パドル４が回転自在に設けてあると共に、第
２ロール３2には掻き落し板５が接触しかつ掻き
落し板５と連続してＵ字状となりかつ一対の側壁
２ｂ間に亘つた（つまり現像ロール３の軸方向に
連続した）溝部６が形成してあり、該溝部６が側
壁２ｂの開口２b′より外方に開口していると共
に、溝部６内には第１搬送手段となる第１オーガ
７が長手方向に亘つて回転自在に設けられてい
る。 FIG. 1 is a perspective view, in which a housing 2 of a developing machine A is provided facing a drum-shaped photosensitive material 1. A pair of developing rolls 3 1 , 3 2 and a conveyance paddle 4 are rotatably provided between the pair of side walls 2 b, and a scraping plate 5 is in contact with the second roll 3 2 . In addition, a U-shaped groove 6 is formed continuously with the scraping plate 5 and extends between the pair of side walls 2b (that is, continuous in the axial direction of the developing roll 3). A first auger 7, which is open outward from the opening 2b' and serves as a first conveyance means, is provided in the groove 6 so as to be rotatable in the longitudinal direction.
前記搬送パドル４の軸心には第２搬送手段とな
る第２オーガ８が軸方向に亘つて回転自在に支承
され、該第２オーガ８の一端部８′は前記側壁２
ｂに形成した開口２″ｂより外方に突出している。 A second auger 8 serving as a second conveying means is rotatably supported in the axial direction of the conveying paddle 4, and one end 8' of the second auger 8 is connected to the side wall 2.
It protrudes outward from the opening 2''b formed in b.
前記搬送パドル４は、左右一対の円板４ａ，
４′ａの外周面に亘つて断面コ字状のバケツト４
ｂを回転方向に亘つて複数横架固設すると共に、
径方向に相対向したバケツト４ｂ間に亘つて撹拌
板４ｃが軸方向に斜めとなつて軸方向に隔をおい
て複数固設してある。 The conveyance paddle 4 includes a pair of left and right discs 4a,
A bucket 4 with a U-shaped cross section extends over the outer peripheral surface of 4'a.
b is fixed on a plurality of horizontal frames in the rotational direction, and
A plurality of stirring plates 4c are fixedly provided obliquely in the axial direction and spaced apart from each other in the axial direction between the buckets 4b facing each other in the radial direction.
前記第２オーガ８は外筒８ａ内にスクリユー８
ｂを挿通した形状であり、外筒８ａの一端は一方
の円板４ａの孔４ｄに回転自在に挿通しかつ開口
２″ｂに嵌合され、他端は他方の円板４′ａのフラ
ンジ４ｅに回転自在に支承してあると共に、外筒
８ａは各撹拌板４ｃの孔４′ｃ内に遊嵌挿通され、
スクリユー８ｂにはスプロケツト８ｃが固着して
あると共に、他方の円板４′ａには歯車４ｆが連
結され、第２オーガ８と搬送パドル４とは逆方向
に回転駆動されるように構成してある。 The second auger 8 has a screw 8 inside the outer cylinder 8a.
One end of the outer cylinder 8a is rotatably inserted into the hole 4d of one disc 4a and fitted into the opening 2''b, and the other end is inserted into the flange of the other disc 4'a. 4e, and the outer cylinder 8a is loosely inserted into the hole 4'c of each stirring plate 4c.
A sprocket 8c is fixed to the screw 8b, and a gear 4f is connected to the other disc 4'a, so that the second auger 8 and the conveyance paddle 4 are driven to rotate in opposite directions. be.
前記第２オーガ８の外筒８ａには開口部８ｄが
長手方向に亘つて形成してあり、該開口部８ｄは
第３図に示すように、搬送パドル４が矢印方向に
回転してハウジング２内の現像剤イが回転方向に
斜めとなつた時に、現像剤イの低い側（現像剤量
の少ない側）に開口するように形成されていると
共に、第４図に示すように、現像剤搬送方向に向
けて順次広幅となつていると共に、各撹拌板４ｃ
と対向する部分には切欠８ｅが形成されて、その
部分が広幅となつている。 An opening 8d is formed in the outer cylinder 8a of the second auger 8 in the longitudinal direction, and as shown in FIG. When the developer A inside is tilted in the direction of rotation, the opening is opened on the lower side of the developer A (the side with a smaller amount of developer), and as shown in FIG. The width of each stirring plate 4c becomes wider in the conveyance direction.
A notch 8e is formed in the portion facing the , and that portion is wide.
９は前記側壁２ｂに固設した補助ハウジングで
あり、前記第１、第２オーガ７，８の一端部７′，
８′を覆う底壁９ａと側壁９ｂとを備え、第１オ
ーガ一端部７′と第２オーガ一端部９′との中間位
置に搬送・混合専用室１０を形成していると共
に、該搬送・混合専用室１０内には搬送、混合羽
根１１が回転自在に設けてあり、さらに第１オー
ガ一端部７′の上方位置にはトナーボツクス１２
に接続した補給トナー搬送手段となるオーガ１３
が臨ませてある。 9 is an auxiliary housing fixed to the side wall 2b, and one end portion 7' of the first and second augers 7, 8;
8', and a transport/mixing chamber 10 is formed at an intermediate position between the first auger end 7' and the second auger end 9'. A conveying and mixing blade 11 is rotatably provided in the mixing chamber 10, and a toner box 12 is located above the first auger end 7'.
An auger 13 serving as a replenishment toner conveying means connected to
is coming.
１４は穂立調整部材である。 Reference numeral 14 denotes an ear stand adjustment member.
なお、第１、第２現像ロール３1，３2は磁石３
ａの回りにスリーブ３ｂを回転自在に設けたもの
である。 Note that the first and second developing rolls 3 1 and 3 2 are magnets 3
A sleeve 3b is rotatably provided around a.
しかして、現像ロール３により搬送された感材
１と対向した現像領域ロを通過した現像剤は掻き
落し板５によつて引き離されても溝部６内に落下
堆積される。 Accordingly, the developer that has passed through the developing area B opposite to the photosensitive material 1 transported by the developing roll 3 is dropped and deposited in the groove 6 even if it is separated by the scraping plate 5.
この溝部６内の現像剤中のトナー濃度はハウジ
ング２内の現像剤中のトナー濃度より低く、かつ
軸方向（現像ロール軸方向）のトナー濃度が不均
一な状態にある。 The toner concentration in the developer in the groove 6 is lower than the toner concentration in the developer in the housing 2, and the toner concentration in the axial direction (developing roll axial direction) is non-uniform.
そして、溝部６内の現像剤は第１オーガ７によ
り搬送・混合専用室１０に混合されながら搬送落
下され、搬送・混合専用室１０内で回転している
搬送・混合羽根１１によつてオーガ１３より搬送
落下される補給トナーと混合されながら第２オー
ガ８の一端部８′に搬送供給される。 Then, the developer in the groove 6 is conveyed and dropped while being mixed into the conveyance/mixing chamber 10 by the first auger 7, and is transferred to the auger 13 by the conveyance/mixing blade 11 rotating within the conveyance/mixing chamber 10. The toner is conveyed and supplied to one end 8' of the second auger 8 while being mixed with the replenishment toner that is conveyed and dropped.
第２オーガ８は搬送・混合羽根１１で搬送、供
給された現像剤をオーガの混合作用により更に混
合しながら搬送パドル４の内部に搬送されてオー
ガ外筒８ａの開口部８ｄにより搬送パドル４内部
の現像剤上に落下し、搬送パドル４の撹拌板４ｃ
で撹拌されて順次現像ロール３に供給される。 The second auger 8 transports the supplied developer with a transport/mixing blade 11, further mixes the supplied developer by the mixing action of the auger, and transports the developer into the transport paddle 4 through the opening 8d of the auger outer cylinder 8a. The developer drops onto the stirring plate 4c of the conveyance paddle 4.
and is sequentially supplied to the developing roll 3.
以上の様にして現像ロール３に供給された現像
剤は軸方向に必ず均一なトナー濃度となつている
と共に、トナーとキヤリアとが十分に混合されて
トナーは正常な帯電状態に保たれている。 The developer supplied to the developing roll 3 in the above manner always has a uniform toner concentration in the axial direction, and the toner and carrier are sufficiently mixed to maintain the toner in a normally charged state. .
また、トナー補給機構は軸方向全域に亘つて補
給トナーを均一に供給する必要がないので、トナ
ー補給機構を簡単な構造で安価とすることができ
る。 Further, since the toner replenishing mechanism does not need to uniformly supply replenishing toner over the entire axial direction, the toner replenishing mechanism can be made simple in structure and inexpensive.
また、第２オーガ８で搬送された現像剤は搬送
パドル４内に落下排出され、搬送パドル４ととも
に回転される撹拌板４ｃで撹拌されるから、第２
オーガ８で搬送される供給トナーを含んだ現像剤
（新現像剤）とハウジング２内の現像剤（旧現像
剤）が十分に混合され、トナーのこなし、新・旧
現像剤の混合・軸方向（搬送方向）の濃度均一化
が十分に促進されて、トナーのかたまりが画像上
に現われたり・連続複写作業した際に現像ロール
３の軸方向一部分の画像濃度が除々に低下したり
することがなく、長期間に亘つて良好なる現像を
行なうことができる。 Further, the developer transported by the second auger 8 is discharged by falling into the transport paddle 4, and is stirred by the stirring plate 4c which rotates together with the transport paddle 4.
The developer (new developer) containing the supplied toner conveyed by the auger 8 and the developer (old developer) in the housing 2 are sufficiently mixed, and the toner is properly mixed and the new and old developer are mixed in the axial direction. (transport direction) is sufficiently promoted to prevent toner clumps from appearing on the image or the image density gradually decreasing in a portion of the axial direction of the developing roll 3 during continuous copying work. Therefore, good development can be carried out over a long period of time.
また、第２オーガ８の外筒８ａが形成した開口
部８ｄは、現像剤搬送方向に向けて順次広幅とな
つていると共に、撹拌板４ｃと対向した部分は広
幅となつているから、第２オーガ８で搬送された
現像剤は開口部８ｄより搬送方向（軸方向）に沿
つて均一に搬送パドル４内に落下排出されるの
で、軸方向の現像剤濃度がより一層均一化され、
より一層良好なる現像を行なうことができる。 Further, the opening 8d formed by the outer cylinder 8a of the second auger 8 gradually becomes wider in the developer transport direction, and the portion facing the stirring plate 4c is wider. The developer transported by the auger 8 is uniformly dropped and discharged into the transport paddle 4 along the transport direction (axial direction) from the opening 8d, so that the developer concentration in the axial direction is made even more uniform.
Even better development can be performed.
なお、搬送、混合羽根１１の形状は図示の形状
に限定するものではないと共に、トナー補給機構
及びトナー補給位置は以上の実施例に限定される
ものではなく従来と同一としても良い。 Note that the shape of the conveying and mixing blades 11 is not limited to the shape shown in the drawings, and the toner replenishment mechanism and toner replenishment position are not limited to the above embodiments and may be the same as conventional ones.
本発明は以上の様になり、現像に使われた後の
現像剤は全部補助ハウジングに搬送され、ここで
新しいトナーを補充されると共に十分に混合撹拌
されるから、この補助ハウジングにおいて、必要
な濃度と十分な帯電量を備えた現像剤が得られ、
この現像剤が現像機ハウジング内に導びかれるこ
とになる。 The present invention is as described above, and all the developer used for development is conveyed to the auxiliary housing, where it is replenished with new toner and sufficiently mixed and agitated. A developer with density and sufficient charge amount can be obtained,
This developer will be led into the developer housing.
また、搬送パドル４とともに軸方向に斜めとな
つた撹拌板４ｃがオーガ８の外筒８ａの回りを回
転するから、オーガ８で搬送された新現像剤とハ
ウジング２内の旧現像剤が十分に撹拌・混合さ
れ、トナーのこなし・新・旧現像剤の混合・軸方
向の濃度均一化が十分に促進される。 In addition, since the stirring plate 4c, which is inclined in the axial direction together with the conveying paddle 4, rotates around the outer cylinder 8a of the auger 8, the new developer conveyed by the auger 8 and the old developer in the housing 2 are sufficiently mixed. The toner is stirred and mixed to sufficiently promote toner handling, mixing of new and old developer, and uniform density in the axial direction.
したがつて、トナーのかたまりが画像上に現わ
れたり、連続複写作業時に現像ロールの軸方向一
部分の画像濃度が徐々に低下することがなく、常
に良好なる現像を行なうことができる。 Therefore, toner clumps do not appear on the image, and the image density in a portion of the developing roll in the axial direction does not gradually decrease during continuous copying operations, so that good development can be carried out at all times.
また、本発明においては補助ハウジングの回転
部材の回転軸は同方向に配置されているからその
製作が容易であり、各回転軸を同一駆動源で駆動
できるという利点もある。 Further, in the present invention, since the rotating shafts of the rotating members of the auxiliary housing are arranged in the same direction, manufacturing is easy, and there is an advantage that each rotating shaft can be driven by the same drive source.
第１図は本発明の実施例を示す斜視図、第２図
は補助ハウジング部分の横断面図、第３図は第２
図の―線断面図、第４図は第３図の―線
断面図である。
１は感材、２はハウジング、３は現像ロール、
４は搬送パドル、４ｂはバケツト、４ｃは撹拌
板、７，８は第１・第２搬送手段（オーガ）、８
ａは外筒、８ｄは開口部、１０は搬送・混合専用
室。
FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of the auxiliary housing portion, and FIG.
FIG. 4 is a cross-sectional view taken along the line - in FIG. 3. 1 is a photosensitive material, 2 is a housing, 3 is a developing roll,
4 is a transport paddle, 4b is a bucket, 4c is a stirring plate, 7 and 8 are first and second transport means (auger), 8
a is an outer cylinder, 8d is an opening, and 10 is a chamber exclusively for conveyance and mixing.
Claims (1)
現像に使われた後の現像剤の全部を、第１オーガ
によつて現像機ハウジングの側方に固設した補助
ハウジングの上方部に搬送するようにすると共
に、補助ハウジングの上方部にトナー補給手段
を、また下方部には搬送・混合羽根を回転自在に
第１オーガと同方向に設け、補助ハウジングの下
方部から第２オーガによつて現像機ハウジングの
搬送パドル内に現像剤を搬送するようにし、第２
オーガは搬送パドルの中央軸方向に設置し、搬送
パドルの周囲に設けたバケツトとオーガの外筒と
の間の空間に、撹拌板を軸方向に斜めでかつ軸方
向に間隔をおいて複数配設すると共に、前記撹拌
板をバケツトに連結して搬送パドルとともに撹拌
板がオーガの固定外筒の回りを回転するようにし
たことを特徴とする現像機の現像剤撹拌装置。1. All of the developer used in the development that has passed through the developing area above the developing machine housing is conveyed by the first auger to the upper part of the auxiliary housing fixed to the side of the developing machine housing. At the same time, a toner replenishing means is provided in the upper part of the auxiliary housing, and a conveying/mixing blade is rotatably provided in the lower part in the same direction as the first auger. The developer is conveyed into the conveyance paddle of the housing, and the second
The auger is installed in the direction of the central axis of the conveyance paddle, and a plurality of stirring plates are arranged diagonally in the axial direction and at intervals in the axial direction in the space between the bucket provided around the conveyance paddle and the outer cylinder of the auger. A developer stirring device for a developing machine, characterized in that the stirring plate is connected to a bucket so that the stirring plate rotates around a fixed outer cylinder of an auger together with a conveyance paddle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58009950A JPS59136760A (en) | 1983-01-26 | 1983-01-26 | Developer stirring device of developing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58009950A JPS59136760A (en) | 1983-01-26 | 1983-01-26 | Developer stirring device of developing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59136760A JPS59136760A (en) | 1984-08-06 |
| JPH0155454B2 true JPH0155454B2 (en) | 1989-11-24 |
Family
ID=11734249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58009950A Granted JPS59136760A (en) | 1983-01-26 | 1983-01-26 | Developer stirring device of developing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59136760A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2586048B2 (en) * | 1987-07-21 | 1997-02-26 | 富士ゼロックス株式会社 | Developer stirring device |
| JP4551861B2 (en) * | 2005-10-28 | 2010-09-29 | シャープ株式会社 | Developing device and image forming apparatus |
-
1983
- 1983-01-26 JP JP58009950A patent/JPS59136760A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59136760A (en) | 1984-08-06 |
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