JPS6239405Y2 - - Google Patents
Info
- Publication number
- JPS6239405Y2 JPS6239405Y2 JP1978011900U JP1190078U JPS6239405Y2 JP S6239405 Y2 JPS6239405 Y2 JP S6239405Y2 JP 1978011900 U JP1978011900 U JP 1978011900U JP 1190078 U JP1190078 U JP 1190078U JP S6239405 Y2 JPS6239405 Y2 JP S6239405Y2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing roller
- sleeve
- scraping
- stirring
- 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
- 238000003756 stirring Methods 0.000 claims description 28
- 238000007790 scraping Methods 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Description
【考案の詳細な説明】
〈技術分野〉
本考案は複写機の現像部における現像剤撹拌装
置にかかり、特に２成分系現像剤の撹拌を効率的
に行う撹拌装置に関する。[Detailed Description of the Invention] <Technical Field> The present invention relates to a developer stirring device in a developing section of a copying machine, and particularly relates to a stirring device that efficiently stirs a two-component developer.
〈従来技術〉
従来２成分系の現像剤、所謂キヤリアーと称す
る鉄粉と着色顔料のトナーを撹拌する装置として
は第１図Ａ，Ｂに示すものがある。この第１図Ａ
の撹拌装置は、現像剤を収容した現像槽１内に２
本の回転軸２，３を設け、この回転軸２，３に互
に逆方向のスクリユー４，５を設けている。尚、
符号６は現像ローラで該現像ローラにて磁気ブラ
シを形成し、潜像を現像する。又、上記回転軸
２，３及び現像ローラ６は各々の軸にギヤ、又は
スプロケツト等を固着し、駆動源よりチエーン等
を介して夫々回転させられる。この時、回転軸
２，３が同方向に回転することで、現像剤は第２
図Ａに示す循環経路で撹拌される。ここで、現像
剤の流れ中、撹拌に効果のある部分は、両回転軸
２，３間と、現像ローラ６に近い回転軸３のスク
リユー５が現像ローラ上の現像剤と当る小さな矢
印（第２図Ａ参照）で示した部分である。この撹
拌部分の内両回転軸２，３間の撹拌は、回転軸
２，３のスクリユー４，５に押し出された現像剤
だけが撹拌される。そのため、実際には、両回転
軸２，３の中央の現像剤は静止しており、この中
央部間に仕切り板を立てた場合でも差異は見られ
ない。<Prior Art> As a conventional two-component developer, a so-called carrier, an apparatus for stirring a toner consisting of iron powder and a color pigment is shown in FIGS. 1A and 1B. This figure 1A
The stirring device has two parts in the developer tank 1 containing the developer.
Book rotation shafts 2 and 3 are provided, and screws 4 and 5 in opposite directions are provided on the rotation shafts 2 and 3. still,
A developing roller 6 forms a magnetic brush and develops the latent image. Further, the rotating shafts 2 and 3 and the developing roller 6 have gears or sprockets fixed to each shaft, and are rotated by a drive source via a chain or the like. At this time, the rotating shafts 2 and 3 rotate in the same direction, so that the developer is transferred to the second
The mixture is stirred in the circulation path shown in Figure A. Here, while the developer is flowing, the areas where stirring is effective are between the two rotating shafts 2 and 3, and where the screw 5 of the rotating shaft 3 near the developing roller 6 hits the developer on the developing roller (the small arrow mark). This is the part shown in Figure 2A). In the stirring between the two rotating shafts 2 and 3 in this stirring portion, only the developer pushed out by the screws 4 and 5 of the rotating shafts 2 and 3 is stirred. Therefore, in reality, the developer at the center of both rotating shafts 2 and 3 is stationary, and no difference is seen even if a partition plate is erected between these center portions.
又、今一つの現像ローラ６上の現像剤とスクリ
ユー５とが当る部分の撹拌部は撹拌効果が見られ
るが、スクリユー部が現像ローラ上の現像剤を軸
方向にかき落していくことによるため、現像ロー
ラ上の現像剤の全面にかき落すことができない。
この効率を上げるにはスクリユー２のピツチを小
さくし、スクリユーの高さを高くする方法、又は
回転軸の外周（回転）速度を現像ローラの外周速
度より速くすることが考えられる。このようにす
ることは部品等のコストアツプ、装置の大型化を
免れない。 In addition, a stirring effect can be seen in the stirring part where the developer on the other developing roller 6 and the screw 5 come into contact, but this is because the screw part scrapes off the developer on the developing roller in the axial direction. It is not possible to scrape off the entire surface of the developer on the developing roller.
In order to increase this efficiency, it is possible to reduce the pitch of the screw 2 and increase the height of the screw, or to make the outer circumferential (rotational) speed of the rotating shaft faster than the outer circumferential speed of the developing roller. Doing this will inevitably increase the cost of parts, etc. and increase the size of the device.
一方、第１図Ｂの撹拌装置は、回転軸２，３に
中央部で相互に逆方向となる撹拌用スクリユー４
ａ，４ｂ、及び５ａ，５ｂを設けたものである。
これは、第１図Ａのものと程同様で、その撹拌状
態の概要図を第２図Ｂに示しており、第１図Ａの
ものに比し撹拌効率が良いように思われるが、撹
拌経路が中央部を境にして左右に分離する。その
ため、左右独立した現像剤の流れを形成すること
から、現像槽内の現像剤が中央を境に、異なる濃
度を示す。 On the other hand, the stirring device shown in FIG.
a, 4b, and 5a, 5b.
This is quite similar to the one in Figure 1A, and a schematic diagram of its stirring state is shown in Figure 2B.It seems that the stirring efficiency is better than that in Figure 1A, but the stirring The route separates into left and right with the center as the border. Therefore, since independent developer flows are formed on the left and right sides, the developer in the developer tank exhibits different concentrations across the center.
〈考案の目的〉
本考案は上述の各欠点に鑑み、現像剤の循環を
有効に行い、現像剤の撹拌を効果的に行うと共に
現像ローラに撹拌した現像剤を供給することを目
的とするものである。<Purpose of the invention> In view of the above-mentioned drawbacks, the present invention aims to effectively circulate the developer, effectively stir the developer, and supply the stirred developer to the developing roller. It is.
〈実施例〉 以下、図面に従つて本考案を詳細に説明する。<Example> The present invention will be described in detail below with reference to the drawings.
第３図は本考案による撹拌装置を備えた現像部
の断面図、第４図は現像部の蓋を外した上面図で
ある。図中７は２成分系現像剤、即ち鉄粉とトナ
ーを収納する現像槽である。この現像槽７内には
林り合う極が図に示される通り、SNSと順次異な
る奇数極からなるマグネツトローラ８-1上の周囲
を包み込む円筒状の非磁性体スリーブ８-2とで構
成される現像ローラ８を設けている。この現像ロ
ーラ８は回転する感光体ドラム９と対向して設け
られ、ドラム９上に形成された潜像にトナーを付
着させ可視化する。該現像ローラ８はマグネツト
ローラ８-1を固定し外周のスリーブ８-2を矢印の
方向に回転させ、現像剤をスリーブ上に磁気吸着
すると共に現像領域まで搬送し、且つ各極の所で
磁気ブラシ（穂立ち）を形成し現像を行う。又、
現像槽７内に設けられたドクター１０は現像ロー
ラ８上に吸着される現像剤の量を規制するもの
で、現像ローラ８に吸着される現像剤を常に一定
に保ち均一な現像を行うようにしている。 FIG. 3 is a sectional view of a developing section equipped with a stirring device according to the present invention, and FIG. 4 is a top view of the developing section with the lid removed. In the figure, numeral 7 denotes a developer tank containing a two-component developer, that is, iron powder and toner. As shown in the figure, the developer tank 7 is composed of an SNS and a cylindrical non-magnetic sleeve 8-2 that wraps around the magnet roller 8-1 , which is made up of different odd-numbered poles. A developing roller 8 is provided. The developing roller 8 is provided facing a rotating photosensitive drum 9, and attaches toner to the latent image formed on the drum 9 to make it visible. The developing roller 8 fixes the magnet roller 8-1 and rotates the sleeve 8-2 on the outer periphery in the direction of the arrow to magnetically attract the developer onto the sleeve and convey it to the developing area, and at each pole. A magnetic brush is formed and development is performed. or,
A doctor 10 provided in the developing tank 7 regulates the amount of developer adsorbed onto the developing roller 8, and is designed to keep the amount of developer adsorbed onto the developing roller 8 constant and perform uniform development. ing.
一方、本考案の撹拌装置は現像ローラ８の感光
体ドラム９と対向する反対側の現像槽７内に、現
像ローラ８上の現像剤をかき落す役割を果すかき
落し板１１を設けている。このかき落板１１は、
第５図に詳細を示す様に現像ローラ８と対向する
面に傾斜ｄを有し、等間隔（ピツチ）で配設した
一方向性のフイン１２を設けている。かき落板１
１のフイン１２は、第３図に示される通り、現像
ローラ８を構成する奇数極のマグネツトローラ８
-1の同極性部分のほぼ中央部に対向し、且つスリ
ーブ８-2と間隔ｂを隔てて配置されている。 On the other hand, in the stirring device of the present invention, a scraping plate 11 is provided in the developing tank 7 on the opposite side of the developing roller 8 facing the photoreceptor drum 9, which serves to scrape off the developer on the developing roller 8. This scraping board 11 is
As shown in detail in FIG. 5, unidirectional fins 12 having an inclination d and arranged at equal intervals (pitch) are provided on the surface facing the developing roller 8. scraping board 1
As shown in FIG.
The sleeve 8 -1 is disposed opposite to the substantially central portion of the same polarity portion and spaced apart from the sleeve 8 -2 by a distance b.
更に、上記かき落板１１を介して回転軸１３を
設けており、この回転軸１３の上周面には撹拌を
目的とし、かき落板１１のフイン１２の方向とは
逆方向のスクリユー１４を設けている。 Furthermore, a rotating shaft 13 is provided through the scraping plate 11, and a screw 14 is provided on the upper peripheral surface of the rotating shaft 13 in a direction opposite to the direction of the fins 12 of the scraping plate 11 for the purpose of stirring. It is set up.
上述の様に構成された撹拌装置によれば、マグ
ネツトローラ８-1が固定されており、同極性部分
の中央部分では、互いに反発する磁力の作用にて
スリーブ８-2上より、現像を終えた現像剤は容易
に分離される状態にある。この部分には傾斜して
いるフイン１２が設けられているため、現像剤は
スリーブ８-2より全てがかき落される。かき落さ
れた現像剤は、かき落板１１を乗り越え回転軸１
３のスクリユー１４側へ送られる。そして、スク
リユー１４にてかき落された現像剤は、撹拌と同
時に搬送され、かき落板１１等を介して撹拌後の
現像剤が現像ローラ８へと送られる。この時の現
像剤撹拌経路は第６図に示す通りであり、第２図
Ａ，Ｂに示す様なつながつたループ状の現像剤の
流れがないため、現像剤の撹拌効果が非常に大き
い。 According to the stirring device configured as described above, the magnet roller 8-1 is fixed, and the development is carried out from above the sleeve 8-2 by the action of mutually repelling magnetic forces in the central portion of the same polarity portion. The finished developer is ready for easy separation. Since the inclined fins 12 are provided in this portion, all of the developer is scraped off from the sleeve 8-2 . The scraped developer passes over the scraping plate 11 and passes through the rotating shaft 1.
3 is sent to the screw 14 side. The developer scraped off by the screw 14 is conveyed while being stirred, and the stirred developer is sent to the developing roller 8 via the scraping plate 11 and the like. The developer stirring path at this time is as shown in FIG. 6, and since the developer does not flow in a continuous loop as shown in FIGS. 2A and 2B, the developer stirring effect is very large.
〈考案の効果〉
以上説明した様に、本考案における撹拌装置は
現像ローラ上の現像剤がスリープから間隔を隔て
て配置された傾斜したフインにてかき落され、回
転軸のスクリユーから新しい撹拌した現像剤が供
給されるので現像ローラ上はつねに撹拌した現像
剤が吸着し、現像ローラ上への撹拌の立上りが早
い。この場合、現像ローラより現像剤を分離する
ための特別の手段を不要として、現像剤のかき落
しと共にこの現像剤の搬送を効果的に伝える。<Effects of the invention> As explained above, in the stirring device of the present invention, the developer on the developing roller is scraped off by the inclined fins arranged at a distance from the developer, and the developer is scraped off from the screw on the rotating shaft. Since the developer is supplied, the agitated developer is always adsorbed onto the developing roller, and the agitation on the developing roller quickly rises. In this case, there is no need for any special means for separating the developer from the developing roller, and the scraping of the developer and the conveyance of the developer are effectively transmitted.
又、つながつたループ状の現像剤の流れがない
為（第６図参照）回転軸内を常に巡る現像剤がな
くなり効果的に現像剤を順次撹拌できる。更に、
回転軸（スクリユーを含む）が１本であることか
ら２本使用する撹拌方法に比べ現像槽内の容積が
低減され現像槽が小さく構成でき、現像剤も少な
くてすむ。 Further, since there is no continuous loop-shaped developer flow (see FIG. 6), the developer does not constantly circulate within the rotating shaft, and the developer can be effectively successively agitated. Furthermore,
Since there is only one rotating shaft (including a screw), the volume inside the developer tank is reduced compared to the stirring method using two shafts, the developer tank can be made smaller, and less developer can be used.
第１図Ａ及びＢは従来の撹拌装置を示す上面図
第２図Ａ及びＢは第１図Ａ及びＢにおける撹拌状
態（循環経路）を示す概略図、第３図は本考案に
おける撹拌装置を現像部に設けた状態を示す断面
図、第４図は第３図の現像槽の蓋を外した上面
図、第５図は本考案にかかるかき落板の示す斜視
図、第６図は本考案にかかる撹拌状態（循環経
路）を示す概略図である。
７：現像槽、８：現像ローラ、１１：かき落
板、１２：フイン、１３：回転軸、１４：スクリ
ユー。
Figures 1A and B are top views showing a conventional stirring device. Figures 2A and B are schematic diagrams showing the stirring state (circulation path) in Figures 1A and B. Figure 3 is a top view showing the stirring device of the present invention. 4 is a top view of the developer tank shown in FIG. 3 with the lid removed; FIG. 5 is a perspective view of the scraping plate according to the present invention; and FIG. 6 is a view of the present invention. FIG. 2 is a schematic diagram showing a stirring state (circulation path) according to the invention. 7: developer tank, 8: developer roller, 11: scraping plate, 12: fin, 13: rotating shaft, 14: screw.
Claims (1)
のにおいて、回転する非磁性体スリーブ内に外周
の磁極が奇数極からなる固定されたマグネツトと
を備えてなる現像ローラと、上記奇数極のマグネ
ツトの隣接する同一極間の中央部付近に対向して
設けられ上記スリーブと一定間隔を隔てて位置さ
れ一方向に傾斜されたフインを備え上記スリーブ
より現像剤をかき落すかき落板と、上記フインに
てかき落された現像剤のかき落し方向と逆方向へ
現像剤を送り、上記かき落板を介して現像剤を上
記現像ローラへ供給するための回転スクリユーと
を備えたことを特徴とする複写機の現像剤撹拌装
置。 In a device that performs magnetic brush development using a two-component developer, a developing roller comprising a rotating non-magnetic sleeve and a fixed magnet whose outer circumference has an odd number of magnetic poles, and an adjacent magnet with the odd number of poles. a scraping plate for scraping off the developer from the sleeve, the scraping plate having fins arranged opposite to each other in the vicinity of the center between the same poles, spaced apart from the sleeve and tilted in one direction; A copying machine comprising: a rotating screw for feeding the developer in a direction opposite to the scraping direction of the scraped developer and supplying the developer to the developing roller via the scraping plate. developer stirring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978011900U JPS6239405Y2 (en) | 1978-02-01 | 1978-02-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978011900U JPS6239405Y2 (en) | 1978-02-01 | 1978-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54114942U JPS54114942U (en) | 1979-08-13 |
| JPS6239405Y2 true JPS6239405Y2 (en) | 1987-10-07 |
Family
ID=28827170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978011900U Expired JPS6239405Y2 (en) | 1978-02-01 | 1978-02-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6239405Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11119527A (en) * | 1997-10-08 | 1999-04-30 | Ricoh Co Ltd | Two-component developing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025237A (en) * | 1973-07-04 | 1975-03-17 | ||
| JPS5044837A (en) * | 1973-08-23 | 1975-04-22 | ||
| JPS5253431A (en) * | 1975-10-27 | 1977-04-30 | Mita Ind Co Ltd | Development device |
-
1978
- 1978-02-01 JP JP1978011900U patent/JPS6239405Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025237A (en) * | 1973-07-04 | 1975-03-17 | ||
| JPS5044837A (en) * | 1973-08-23 | 1975-04-22 | ||
| JPS5253431A (en) * | 1975-10-27 | 1977-04-30 | Mita Ind Co Ltd | Development device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54114942U (en) | 1979-08-13 |
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