JPS61200841A - Powder stirrer - Google Patents
Powder stirrerInfo
- Publication number
- JPS61200841A JPS61200841A JP60041577A JP4157785A JPS61200841A JP S61200841 A JPS61200841 A JP S61200841A JP 60041577 A JP60041577 A JP 60041577A JP 4157785 A JP4157785 A JP 4157785A JP S61200841 A JPS61200841 A JP S61200841A
- Authority
- JP
- Japan
- Prior art keywords
- rotary shaft
- stirrer
- rotating shaft
- stirring
- flowed
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
- B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
- B01F27/1921—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements comprising helical elements and paddles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dry Development In Electrophotography (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
【発明の詳細な説明】
く技術分野〉
この発明は電子写真複写機の現像槽内の攪拌ローラ等と
して使用される粉体攪拌器に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a powder stirrer used as a stirring roller or the like in a developer tank of an electrophotographic copying machine.
〈従来技術とその欠点〉
従来の複写機における現像槽内の攪拌器は、現像容器内
にトナーおよびテベロッパー〇二成分の現像剤が入って
おり、この二成分の現像剤を均一にするため攪拌器によ
り攪拌されている。このような二成分現像方式において
は、感光体ドラム上の潜像が場所的に偏って常時形成さ
れると、トナー濃度に偏りが生じ、複写画像に濃度差が
生じる。感光体ドラムの軸方向におけるトナー消費ムラ
はこれを積極的に解消しない限りそのまま残る。<Prior art and its drawbacks> The agitator in the developer tank of a conventional copying machine contains two-component developer: toner and developer, and stirs the two-component developer to make it uniform. It is stirred by a container. In such a two-component development system, if the latent image on the photoreceptor drum is always formed in a localized manner, the toner concentration will be localized and a density difference will occur in the copied image. The unevenness of toner consumption in the axial direction of the photoreceptor drum will remain unless it is actively resolved.
したがって攪拌器は軸方向の攪拌性が重要な機能となる
。第５図および第６図は従来実施或いは提案されている
攪拌器およびその攪拌器についての実験結果である。攪
拌器の軸方向に濃度の異なる２つのトナーを現像槽内に
入れ、時間経過に伴う所定の測定点におけるトナー濃度
の変化を測定したものである（ＰＬ、Ｐ２．Ｐ３は現像
槽内の左、中央、右にそれぞれ対応する）。回転軸に対
して斜めに付設された半円形の回転翼を有する攪拌器の
場合（第５図（Ａ）、第６図（Ａ）参照）、また回転軸
に対し、楕円形の攪拌翼、および回転軸に対して平行に
付設された攪拌翼を設けたもの（第５図（Ｂ）、第６図
（Ｂ）参照）は何れも左右方向の流動性が劣り、左右対
称的に攪拌されていない。この偏りが濃度均一化の時間
を遅らせる一因にもなっている。更に、従来においては
攪拌器を２本設置し、これを相互逆転するもの等もある
が、装置が大型化し、また複雑化するという問題があっ
た（特開昭５８−２５６６９、特開昭５６−３６６７Ｌ
特開昭５８−３８９７０、実開昭５９−１６９３９号参
照）。Therefore, the stirring ability in the axial direction is an important function of the stirrer. FIGS. 5 and 6 show conventionally implemented or proposed agitators and experimental results regarding the agitators. Two toners with different concentrations were placed in the developer tank in the axial direction of the agitator, and the changes in toner concentration at predetermined measurement points over time were measured (PL, P2, and P3 are the left and right sides of the developer tank. , center, and right, respectively). In the case of a stirrer having a semicircular rotor blade attached obliquely to the rotation axis (see FIGS. 5(A) and 6(A)), an elliptical stirring blade with respect to the rotation axis, and those equipped with stirring blades attached parallel to the rotation axis (see Figures 5 (B) and 6 (B)) have poor lateral fluidity and are not agitated symmetrically. Not yet. This bias also causes a delay in the time required for concentration uniformity. Furthermore, conventional methods include installing two stirrers and rotating them mutually, but this has the problem of increasing the size and complexity of the device (Japanese Patent Laid-Open No. 58-25669, Japanese Patent Laid-open No. 56 -3667L
(See Japanese Patent Application Laid-open No. 58-38970 and Utility Model Application No. 59-16939).
〈発明の目的〉
この発明の目的は上記従来の問題点を解消するために成
されたもので攪拌器の軸方向の攪拌性能を向上させた攪
拌器を提供することにある。 。<Object of the Invention> The object of the present invention is to provide a stirrer which has been made to solve the above-mentioned conventional problems and has improved stirring performance in the axial direction of the stirrer. .
〈発明の構成および効果〉
この発明は回転軸に対して斜めに付設された第１の攪拌
翼と、前記回転軸に対して軸方向に付設された第２の攪
拌翼とからなり、前記回転軸を中空にするとともに、そ
の内面に螺旋形状の溝を形成し、前記回転軸に複数の貫
通孔を設けたことを特徴とする。<Configuration and Effects of the Invention> The present invention comprises a first stirring blade attached obliquely to the rotating shaft and a second stirring blade attached axially to the rotating shaft, It is characterized in that the shaft is hollow, a spiral groove is formed on its inner surface, and a plurality of through holes are provided in the rotating shaft.
上記構成によれば、粉体の流れは一方向に偏らず、特に
攪拌器の軸方向に対する効果的な流れを得ることができ
る。According to the above configuration, the flow of the powder is not biased in one direction, and an effective flow can be obtained particularly in the axial direction of the stirrer.
〈実施例〉
第１図はこの発明に係る攪拌器を示すものである。同図
において、１）は回転軸、１１はこの回転軸に対して斜
めに付設された略円板形状の第１の攪拌翼、１２は前記
回転軸に対して軸方向に付設された第２の攪拌翼である
。前記回転軸は中空であってその内面に螺旋形状の溝１
５がもうけられ、また所定の箇所に貫通孔１４が形成さ
れている。また前記第２の攪拌翼１２は所定箇所に切欠
きが設けられており、この攪拌器の周囲の現像剤は攪拌
器の回転により回転軸のいずれかの軸方向に流動される
。一方上記貫通孔１４より回転軸内部に入った現像材は
その内面に設けられた螺旋形状の溝により攪拌器の回転
とともに軸内部を移動する。<Example> FIG. 1 shows a stirrer according to the present invention. In the same figure, 1) is a rotating shaft, 11 is a first approximately disk-shaped stirring blade attached obliquely to the rotating shaft, and 12 is a second stirring blade attached axially to the rotating shaft. This is a stirring blade. The rotating shaft is hollow and has a spiral groove 1 on its inner surface.
5, and through holes 14 are formed at predetermined locations. Further, the second agitating blade 12 is provided with a notch at a predetermined location, and the developer around the agitator is caused to flow in one of the axial directions of the rotating shaft by the rotation of the agitator. On the other hand, the developer material that has entered the inside of the rotating shaft through the through hole 14 moves inside the shaft as the agitator rotates due to a spiral groove provided on its inner surface.
第２図はこれらの現像剤の流れを示す図である。同図に
示すように攪拌器外部の現像剤は矢印Ａの方向に流れ、
攪拌器の回転軸内部の現像剤は矢印Ｂの方向に流れる。FIG. 2 is a diagram showing the flow of these developers. As shown in the figure, the developer outside the stirrer flows in the direction of arrow A.
The developer inside the rotating shaft of the agitator flows in the direction of arrow B.
この回転軸内部の現像剤は左側の貫通孔より流入し、内
部の螺旋形状の溝に沿って右方向に流れ、右側に設けら
れた貫通孔より攪拌器外部へ流出する。第３図は攪拌器
回転軸の断面を示すものであり、回転軸内部の螺旋形状
の溝と１５と貫通孔１４の関係は同図に示すようになっ
ている。このように攪拌器外部の現像剤め流れと回転軸
内部あ現像剤の流れを逆方向にすることにより全体とし
て攪拌器の軸方向の流動性を向上させ、軸方向の攪拌性
能を向上させることができる。The developer inside this rotating shaft flows into the through hole on the left side, flows rightward along the internal spiral groove, and flows out of the agitator through the through hole provided on the right side. FIG. 3 shows a cross section of the agitator rotating shaft, and the relationship between the spiral groove 15 inside the rotating shaft and the through hole 14 is as shown in the figure. In this way, by reversing the flow of developer outside the stirrer and the flow of developer inside the rotating shaft, the axial fluidity of the stirrer as a whole is improved, and the axial stirring performance is improved. I can do it.
第４図はこの発明に係る攪拌器の回転軸内部の螺旋形状
の溝を形成する方法について示すものである。攪拌器は
樹脂成形からなり、外部の第１および第２の攪拌翼は上
金型と下金型の上下割型で成形される。一方向転軸内部
の螺旋形状の溝は回転引抜きサイドコアにより成形され
る。同図（Ａ）′の矢印は前記上金型と下金型の分割方
向を示している。また同図（Ｂ）の矢印は前記サイドコ
アの回転方向および引抜き方向を示している。以上のよ
うに本発明によれば攪拌器の軸方向における粉体の流動
性を向上させることができ、しかも左右対称性に優れた
攪拌効果を示すものである。FIG. 4 shows a method of forming a spiral groove inside the rotating shaft of the stirrer according to the present invention. The stirrer is made of resin molding, and the first and second external stirring blades are molded using upper and lower split molds of an upper mold and a lower mold. The helical groove inside the one-way rotating shaft is formed by a rotating drawn side core. The arrow in FIG. 2A indicates the direction in which the upper mold and the lower mold are divided. Further, the arrows in FIG. 3B indicate the rotational direction and the pulling direction of the side core. As described above, according to the present invention, it is possible to improve the fluidity of powder in the axial direction of the stirrer, and moreover, it exhibits a stirring effect with excellent left-right symmetry.
第１図はこの発明に係る攪拌器を示す斜視図、第２図は
攪拌器の外部および攪拌器の回転軸内部の現像剤の流れ
をそれぞれ示す図、第３図は攪拌器回転軸の断面を示す
図、第４図はこの発明に係る攪拌器の成形方法を示す図
、第５図は従来実施或いは提案された攪拌器を示す図、
第６図はこれら従来の実験結果を示す図である。
１−攪拌器、２−サイドコア、
１１−第１の攪拌翼、
１２−第２の攪拌翼、
１）−回転軸、１４−貫通孔、
１５−螺旋形状の溝。
第４図（Ａ）
↓
第４図（Ｂ）
第６図
（Ａ）
（／。）
０１２３４５６７８ （分）
（Ｂ）
（’／、）Fig. 1 is a perspective view showing an agitator according to the present invention, Fig. 2 is a diagram showing the flow of developer outside the agitator and inside the rotating shaft of the agitator, and Fig. 3 is a cross section of the agitator rotating shaft. FIG. 4 is a diagram showing a method of forming an agitator according to the present invention, FIG. 5 is a diagram showing a conventionally implemented or proposed agitator,
FIG. 6 is a diagram showing the results of these conventional experiments. 1-Agitator, 2-Side core, 11-First stirring blade, 12-Second stirring blade, 1)-Rotating shaft, 14-Through hole, 15-Spiral groove. Figure 4 (A) ↓ Figure 4 (B) Figure 6 (A) (/.) 012345678 (minute) (B) ('/,)
Claims (1)
に対して斜めに付設された第１の攪拌翼と、前記回転軸
に対して軸方向に付設された第２の攪拌翼とからなり、
前記回転軸を中空にするとともにその内面に螺旋形状の
溝を形成し、前記回転軸に複数の貫通孔を設けたことを
特徴とする粉体攪拌器。(1) A first stirring blade that has a rotating shaft that is rotatably held and is attached obliquely to the rotating shaft, and a second stirring blade that is attached axially to the rotating shaft. It consists of
A powder agitator characterized in that the rotating shaft is hollow and has a spiral groove formed on its inner surface, and a plurality of through holes are provided in the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60041577A JPS61200841A (en) | 1985-03-01 | 1985-03-01 | Powder stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60041577A JPS61200841A (en) | 1985-03-01 | 1985-03-01 | Powder stirrer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61200841A true JPS61200841A (en) | 1986-09-05 |
| JPH0247934B2 JPH0247934B2 (en) | 1990-10-23 |
Family
ID=12612293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60041577A Granted JPS61200841A (en) | 1985-03-01 | 1985-03-01 | Powder stirrer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61200841A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6577834B2 (en) | 2000-07-19 | 2003-06-10 | Fuji Xerox Co., Ltd. | Two-component developing device, image forming apparatus, and stirring screw thereof |
| JP2007241047A (en) * | 2006-03-10 | 2007-09-20 | Sharp Corp | Developing device |
| JP2007260589A (en) * | 2006-03-29 | 2007-10-11 | Toa Giken Kogyo Kk | Mixer |
| JP2007334288A (en) * | 2006-05-19 | 2007-12-27 | Ricoh Co Ltd | Developing device and image forming apparatus |
| US7817943B2 (en) | 2006-08-29 | 2010-10-19 | Fuji Xerox Co., Ltd. | Developer transport apparatus and image forming apparatus |
-
1985
- 1985-03-01 JP JP60041577A patent/JPS61200841A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6577834B2 (en) | 2000-07-19 | 2003-06-10 | Fuji Xerox Co., Ltd. | Two-component developing device, image forming apparatus, and stirring screw thereof |
| JP2007241047A (en) * | 2006-03-10 | 2007-09-20 | Sharp Corp | Developing device |
| JP4628287B2 (en) * | 2006-03-10 | 2011-02-09 | シャープ株式会社 | Development device |
| JP2007260589A (en) * | 2006-03-29 | 2007-10-11 | Toa Giken Kogyo Kk | Mixer |
| JP2007334288A (en) * | 2006-05-19 | 2007-12-27 | Ricoh Co Ltd | Developing device and image forming apparatus |
| US7817943B2 (en) | 2006-08-29 | 2010-10-19 | Fuji Xerox Co., Ltd. | Developer transport apparatus and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0247934B2 (en) | 1990-10-23 |
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