JPS5997166A - Agitator for developer - Google Patents

Agitator for developer

Info

Publication number
JPS5997166A
JPS5997166A JP57207824A JP20782482A JPS5997166A JP S5997166 A JPS5997166 A JP S5997166A JP 57207824 A JP57207824 A JP 57207824A JP 20782482 A JP20782482 A JP 20782482A JP S5997166 A JPS5997166 A JP S5997166A
Authority
JP
Japan
Prior art keywords
developer
stirring
blades
blade
toner
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.)
Pending
Application number
JP57207824A
Other languages
Japanese (ja)
Inventor
Toshimasa Takano
高野　敏正
Yukio Sugawara
菅原　幸男
Setsurou Hosoguchi
細口　勢津郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Sanko Senzai Kogyo KK
Original Assignee
Toshiba Corp
Sanko Senzai Kogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Sanko Senzai Kogyo KK filed Critical Toshiba Corp
Priority to JP57207824A priority Critical patent/JPS5997166A/en
Publication of JPS5997166A publication Critical patent/JPS5997166A/en
Pending legal-status Critical Current

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
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/726—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two helices with opposite pitch on the same shaft; with two helices on the same axis, driven in opposite directions or at different speeds

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To agitate a developer in the rotating direction with respect to a shaft and to enable the axial movement thereof by providing the 1st and 2nd agitating vanes and isolating the two vanes from each other by means of a shielding body. CONSTITUTION:The driving shaft 18 of an agitator 17 is rotated during developing, and the 1st and 2nd spiral vanes 19, 23 are respectively rotated. A developer 24 is conveyed while it is agitated by the rotation of the vane 23. The conveyed developer 24 is fed through an aperture 22 into a cylindrical body 20 and as the vane 19 rotates, the developer is agitated in the direction opposite from the direction where it is fed by the vane 23, and is thus conveyed. More specifically, the developer 24 is agitated and conveyed while it circulates between the outside and inside of the body 20 around the shaft 18.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明はたとえば乾式電子写真装置の現像装置に備えら
れる現像剤攪拌装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a developer stirring device provided in a developing device of a dry type electrophotographic apparatus, for example.

系の現像剤を使用する乾式電子写真方式の現像装置にお
ける現像剤の攪拌装置としてはたとえば第１図に示すよ
うな攪拌羽根１が用いられている。この攪拌羽根Ｉをつ
けた現像装置としてはたとえば第２図に示す如くである
が、このような現像装置２の場合、軸に対して円周方向
の攪拌に対しては効果はあるが、軸方向への現像剤３の
移動がないためトナー４の補給は軸方向に対して均一に
トナー４を落下させる必要があリ、構造的にトナーホッ
パ５が現像器６の上方にあることが基本となる。トナー
４の容量にもよるが、現像器６全体として高さ方向に犬
きくなシ、複写機全体の大きさとしてはある程度までし
か低くすることができない。また、ホッパー５にトナー
４を補給する手段も比較的面倒になる。また、現像剤３
は軸方向に移動しないため、現像有効幅以外の転写紙を
連続で複写した場合その転写紙の幅のみトナー４が消費
されて不足する。したがって、その後に現像有効幅の転
写紙を複写した場合不均一なすなわち左右の画＠濃度が
異なる複写画像となってしまう不都合がある。また、ト
ナー濃度検知装置を取付ける位置も問題となシ、機能が
半減し、誤動作を生じさせる原因となる。さらには、こ
のような構造をもつ現像装置２をもつ複写機は水平状態
で設置されて使用されることが必要条件であシ、もし、
僅かな傾きを持つ複写機が設置された場合、現像器６の
現像剤３がどちらか一方に片寄シ、現像剤３が現像器６
よシ溢れ複写機内を汚す原因となると同時に複写画像に
欠陥を生じる。For example, a stirring blade 1 as shown in FIG. 1 is used as a developer stirring device in a dry electrophotographic developing device using a type of developer. An example of a developing device equipped with this stirring blade I is as shown in FIG. Since there is no movement of the developer 3 in the axial direction, it is necessary to drop the toner 4 uniformly in the axial direction when replenishing the toner 4. Basically, the toner hopper 5 is structurally located above the developer 6. Become. Although it depends on the capacity of the toner 4, the height of the developing device 6 as a whole can be reduced to a certain extent, and the size of the entire copying machine can only be reduced to a certain extent. Furthermore, the means for replenishing the hopper 5 with the toner 4 is also relatively troublesome. Also, developer 3
Since the toner does not move in the axial direction, when a transfer sheet other than the effective development width is continuously copied, the toner 4 is consumed only in the width of the transfer sheet, resulting in a shortage. Therefore, when a transfer sheet having an effective width for development is subsequently copied, the resulting copy image is non-uniform, that is, the left and right images have different densities. Furthermore, the location where the toner concentration detection device is installed is also a problem, as the functionality is halved and may cause malfunctions. Furthermore, it is necessary for a copying machine having a developing device 2 having such a structure to be installed and used in a horizontal position, and if
When a copying machine is installed with a slight inclination, the developer 3 in the developing device 6 may be shifted to one side, and the developer 3 may be tilted to the other side.
This overflows and contaminates the inside of the copying machine, and at the same time causes defects in the copied images.

上述した問題点を解決する手段としては一度現像に寄算
した現像剤３を完全回収し、回収した現像剤３にトナー
４を補給し充分攪拌した後に使用するしか無く一つの現
像器６内で現像剤３を左右方向を含めた攪拌と搬送を行
うためには構造も複雑になるとともに現像器６自体も大
型になってしまう不都合がある。The only way to solve the above-mentioned problem is to completely collect the developer 3 that has been used for development, replenish the collected developer 3 with toner 4, and stir it thoroughly before using it. In order to stir and transport the developer 3 in both the left and right directions, the structure becomes complicated and the developing device 6 itself becomes large.

現に、市場に出ている複写機で左右方向の攪拌、搬送の
機能を行っている現像器はいずれも構造が複雑で大型で
ある。同軸上に構成された二重スミ４イラル方式の攪拌
装置についてはいくつかのアイ７”４アが提案されてい
るが、いずれも軸に対して円周方向の攪拌性が優れてい
るだけで完全な横方向への現像剤の動きはなく、−重ス
ノ９イラルと二重スパイラルのピッチ差夙での動きしか
ない。したがって、上記のような不都合点を解消するに
紋っていない。In fact, all the developing devices in copying machines on the market that perform the functions of horizontal stirring and conveyance have complicated structures and are large in size. Several eye 7" 4a types have been proposed for coaxially configured double swivel stirrers, but all of them only have excellent stirring performance in the circumferential direction relative to the shaft. There is no complete lateral movement of the developer, but there is only movement with a pitch difference between the double spiral and the double spiral.Therefore, the above-mentioned disadvantages cannot be solved.

なお、同軸上の二重スパイラル方式の性能確認を行なう
ため、ある１点からトナーを落下させ左右方向にトナー
が拡散する時間を計ったところトナー落下点近傍のみト
ナー比濃度が著しく上昇するだけで、数分間攪拌しても
左右のトナー比濃度が上がる傾向は現われなかった。す
なわち、軸方向に対しての現像剤の動きがなく、トナー
の拡散は生じない。また、現像マグネットローラ７の回
転方向によっては現像剤３を掻き揚げるための機能を付
加しなければならず、構造的にも複雑釦なってしまう。In addition, in order to confirm the performance of the coaxial double spiral system, we dropped toner from a certain point and measured the time it took for the toner to spread in the left and right directions.We found that the toner specific concentration only increased significantly only near the toner falling point. Even after stirring for several minutes, there was no tendency for the relative concentration of the left and right toners to increase. That is, there is no movement of the developer in the axial direction, and no toner diffusion occurs. Further, depending on the rotating direction of the developing magnet roller 7, a function for scraping up the developer 3 must be added, resulting in a structurally complicated button.

なお、図中８は感光体である。Note that 8 in the figure is a photoreceptor.

〔発明の目的〕[Purpose of the invention]

本発明は上記事情に着目してなされたもので、その目的
とするところは、比較的簡単な構成でありながら、軸に
対して現像剤を回転方向に攪拌できることは勿論のこと
、軸方向への移動もできるようにした現像剤攪拌装置を
提供しようとするものである。The present invention has been made in view of the above circumstances, and its purpose is to have a relatively simple structure, but also to be able to stir the developer in the rotational direction with respect to the shaft. It is an object of the present invention to provide a developer stirring device that can also move the developer.

〔発明の概要〕[Summary of the invention]

本発明は同軸的に第１および第２の攪拌羽根を有し、こ
れら第１および第２の攪拌羽根間を５− 遮蔽体によって隔離し、前記第１および第２の攪拌羽根
の回転により現像剤を回転方向および軸方向搬送するも
のである。The present invention has first and second agitating blades coaxially, the first and second agitating blades are separated by a 5-shield, and the rotation of the first and second agitating blades allows development. This conveys the agent in the rotational and axial directions.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明を第３図乃至第５図に示した一実施例を参
照して説明する。図中１１は感光体１２に近接して設け
られた現像装置である。この現像装置１１は容器１３を
有し、この容器１３内には前記感光体１２と対向して現
像マグネ、トローラ１４が設けられている。この現像マ
グネットローラ１４の局面には所定間隔を存してブレー
ド１５が対向され、さらに、このブレード１５の下方部
には一端部を上記現像マグネｙ）ｏ−ラ１４の周面に当
接させる掻き落し板１６が設けられている。また、上記
容器１３内には上記現像マグネットローラ１４と平行に
攪拌装置１７が設けられている。この攪拌装置１１は第
４図に示すように駆動シャフト１８を有し、この駆動シ
ャフト１８の外周面には第１の攪拌羽根としての第１の
スパイラル羽根１９６− が装着されている。上記駆動シャフト１８は図示しない
駆動機構によシ回転駆動されるようになっている。また
、前記第１のス／４’イラル羽根１９は遮蔽体としての
円筒体２０によって囲繞され、この円筒体２００両端部
は７ランジ２１を介して上記駆動シャフト１８に固定さ
れている（一端側のみ図示する）。さらに、上記円筒体
２０の両端側にはそれぞれ開口部２２が穿設され（一端
側のみ図示する）でいるとともに外周面には第２の攪拌
羽根としての第２のスパイラル羽根２３が装着されてい
る。この第２のスノ母イラル羽根２３は上記第１のスパ
イラル羽根１９と捩シ方向およびピッチを異にしている
。The present invention will be described below with reference to an embodiment shown in FIGS. 3 to 5. In the figure, reference numeral 11 denotes a developing device provided close to the photoreceptor 12. This developing device 11 has a container 13, and within this container 13, a developing magnet and a troller 14 are provided facing the photoreceptor 12. A blade 15 is opposed to the surface of the developing magnet roller 14 with a predetermined interval therebetween, and one end of the blade 15 is brought into contact with the circumferential surface of the developing magnet roller 14 at the lower part thereof. A scraping plate 16 is provided. Further, a stirring device 17 is provided inside the container 13 in parallel with the developing magnet roller 14 . This stirring device 11 has a drive shaft 18 as shown in FIG. 4, and a first spiral blade 196- as a first stirring blade is attached to the outer peripheral surface of the drive shaft 18. The drive shaft 18 is rotatably driven by a drive mechanism (not shown). Further, the first S/4' spiral blade 19 is surrounded by a cylindrical body 20 as a shield, and both ends of this cylindrical body 200 are fixed to the drive shaft 18 via seven flange 21 (one end side (only shown). Further, openings 22 are formed at both ends of the cylindrical body 20 (only one end is shown), and a second spiral blade 23 as a second stirring blade is attached to the outer peripheral surface. There is. The second spiral blade 23 has a different torsional direction and pitch from the first spiral blade 19.

しかして、現像時には攪拌装置１７の駆動シャフト１８
が図示しない駆動源によシ回転される。この回転によシ
、第１および第２のスパイラル羽根１９．２３がそれぞ
れ回転され、第２のスパイラル羽根２３の回転によル現
像剤２４は攪拌されながら矢印方向に搬送される。そし
て、この搬送された現像剤２４は円筒体２０の開口部２
２から円筒体２０内に送シ込まれ、今度は第１のスパイ
ラル羽根１９の回転によシ第２のスパイラル羽根２３の
回転によって送られてきた方向と逆の方向に攪拌されな
がら搬送される。すなわち、現像剤２４は駆動シャフト
１８を中心に円筒体２ｏの外側と内側を循環して攪拌、
搬送される。Therefore, during development, the drive shaft 18 of the stirring device 17
is rotated by a drive source (not shown). This rotation causes the first and second spiral blades 19 and 23 to rotate, respectively, and the rotation of the second spiral blade 23 transports the developer 24 in the direction of the arrow while being stirred. The transported developer 24 is then transferred to the opening 2 of the cylindrical body 20.
2 into the cylindrical body 20, and is then conveyed while being agitated by the rotation of the first spiral blade 19 and the rotation of the second spiral blade 23 in the opposite direction to the direction in which it was sent. . That is, the developer 24 is circulated around the drive shaft 18 between the outside and inside of the cylindrical body 2o and is agitated.
transported.

なお、第５図に上記攪拌装置１７の性能を確認した実験
結果を示す。すなわち、ある一点からトナーを落下させ
、どの位の時間で拡散するかどうかを見たものであシ、
４５０Ｉｌ！ｌ＋Ｉスｔ４ンの範囲ではトナーの落下量
にかかわらずトナー比濃度が均一になるまでの時間は僅
か４秒である。Incidentally, FIG. 5 shows the results of an experiment in which the performance of the stirring device 17 was confirmed. In other words, it is a method of dropping toner from a certain point and seeing how long it takes for it to spread.
450 Il! In the range of l+I st4, it takes only 4 seconds for the toner specific density to become uniform regardless of the amount of toner falling.

なお、現像剤の拡散時間については、攪拌装置１７の回
転数およびスパイラル羽根１９゜２３のピッチ幅、スパ
ン幅を組合せることによシ調整は可能である。The diffusion time of the developer can be adjusted by combining the rotational speed of the stirring device 17 and the pitch width and span width of the spiral blades 19.degree. 23.

また、攪拌効果が充分であるため、未帯電トナーの飛散
による複写機内の汚れも防止できる。In addition, since the stirring effect is sufficient, it is possible to prevent the interior of the copying machine from becoming dirty due to scattering of uncharged toner.

〔発明の効果〕〔Effect of the invention〕

本発明は以上説明したように、第１および第２の攪拌羽
根を備え、これら第１および第２の攪拌羽根間を遮蔽体
によって隔離し、前記第１および舘２の攪拌羽根の回転
によシ現像剤を回転方向および軸方向へ搬送させるから
トナーの補給路方式に規制を受けたシ、現像マグネット
ローラの回転方向に拘束されることがないとともに複写
画像の濃度差を発生することもない。As explained above, the present invention is provided with first and second stirring blades, the first and second stirring blades are separated by a shield, and the rotation of the first and second stirring blades is performed. Because the developer is conveyed in the rotational and axial directions, it is not restricted by the rotational direction of the developing magnet roller, and there is no difference in density in the copied image. .

また、複写機が多少類いても複写画像に欠陥を生じるこ
ともなく、さらに、構造的にも簡略化し、小型で安価な
現像装置を得ることがでなるという効果を奏するもので
ある。Furthermore, even if copying machines are somewhat similar, no defects will occur in the copied images, and furthermore, the structure can be simplified and a compact and inexpensive developing device can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の攪拌装置を示す側面図、第２図はその攪
拌装置を備えた現像装置を示す側断面図、第３図乃至第
５図は本発明の一実施例を示すもので、第３図は現像装
置を示す側断面図、第４図は攪拌装置を示す側面図、第
５図は現像剤の拡散スピードを示すグラフ図である。 ９− １９・・・第１の攪拌羽根（第１のスノ母イラル羽根）
、２３・・・第２の攪拌羽根（第２のスパイラル羽根）
、２０・・・遮蔽体（円筒体）。 出願人代理人　　弁理士　鈴　江　武　彦１０− 区　　　　　　　　　ｆｆ１ｔ　”ＩＪ４１Ｕ） 鞍FIG. 1 is a side view showing a conventional stirring device, FIG. 2 is a side sectional view showing a developing device equipped with the stirring device, and FIGS. 3 to 5 show an embodiment of the present invention. FIG. 3 is a side sectional view showing the developing device, FIG. 4 is a side view showing the stirring device, and FIG. 5 is a graph showing the diffusion speed of the developer. 9-19...First stirring blade (first snowboard blade)
, 23... second stirring blade (second spiral blade)
, 20... Shielding body (cylindrical body). Applicant's agent Patent attorney Takehiko Suzue 10-ku ff1t ”IJ41U) Saddle

Claims (5)

【特許請求の範囲】[Claims] （１）　　回転軸に回転可能に設けられた第１の攪拌羽
根と、この第１の攪拌羽根と干渉することなく上記回転
軸に設けられた第２の攪拌羽根と、これら第１および第
２の攪拌羽根間を隔離するび軸方向に搬送することを特
徴とする現像剤攪。 押装置。(1) A first stirring blade rotatably provided on the rotating shaft, a second stirring blade provided on the rotating shaft without interfering with the first stirring blade, and these first and second stirring blades. A developer agitator characterized by separating the agitating blades and transporting the developer in the axial direction. Pushing device. （２）遮蔽体は円筒状に構成したことを特徴とする特許
請求の範囲第１項記載の現像剤攪拌装置０(2) The developer agitating device 0 according to claim 1, wherein the shielding body is configured in a cylindrical shape. （３）第１および第２の攪拌羽根は互いに捩じシ方向が
異なるスパイラル羽根としたことを特徴とする特許請求
の範囲第１項または第２項記載の現像剤攪拌装置。(3) The developer stirring device according to claim 1 or 2, wherein the first and second stirring blades are spiral blades having different torsional directions. （４）各スパイラル羽根の捩しシピッチをそれれぞれ異
ならしめたことを特徴とする特許請求の範囲第１＠Ｊ３
項記殻雀像剤鞄攪拌装置。(4) Claim 1@J3 characterized in that each spiral blade has a different twist pitch.
Item: Shell sparrow image agent bag stirring device. （５）円筒状遮蔽体の両端部に開口部を形成したことを
特徴とする特許請求の範囲第２項記載の現像剤攪拌装置
。(5) The developer stirring device according to claim 2, wherein openings are formed at both ends of the cylindrical shield.
JP57207824A 1982-11-27 1982-11-27 Agitator for developer Pending JPS5997166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57207824A JPS5997166A (en) 1982-11-27 1982-11-27 Agitator for developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57207824A JPS5997166A (en) 1982-11-27 1982-11-27 Agitator for developer

Publications (1)

Publication Number Publication Date
JPS5997166A true JPS5997166A (en) 1984-06-04

Family

ID=16546112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57207824A Pending JPS5997166A (en) 1982-11-27 1982-11-27 Agitator for developer

Country Status (1)

Country Link
JP (1) JPS5997166A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6311974A (en) * 1986-03-10 1988-01-19 Ricoh Co Ltd Developing device
EP0452897A2 (en) * 1990-04-18 1991-10-23 Matsushita Electric Industrial Co., Ltd. Developing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6311974A (en) * 1986-03-10 1988-01-19 Ricoh Co Ltd Developing device
EP0452897A2 (en) * 1990-04-18 1991-10-23 Matsushita Electric Industrial Co., Ltd. Developing apparatus
US5189474A (en) * 1990-04-18 1993-02-23 Matsushita Electric Industrial Co., Ltd. Agitating member for a developing apparatus

Similar Documents

Publication Publication Date Title
JP3636217B2 (en) Developing device and image forming apparatus using the same
JPH0134379B2 (en)
JPH11202626A (en) Developing device
JPH04504012A (en) Developing device with two insertable paddle mixers
JPH0850405A (en) Developer stirring/carrying device
JPS5997166A (en) Agitator for developer
JPH07253710A (en) Toner hopper and developing device including the same
JPH0535091A (en) Developing device
JPH0533795B2 (en)
JPS5921396Y2 (en) Developer stirring device
EP0816935B1 (en) Electrostatic latent image developing device
JPH086395A (en) Developer stirring/conveying device
JPS6233583B2 (en)
JP2541754Y2 (en) Developing device
JPH049304B2 (en)
JP2001042617A (en) Developing device for image forming device
JP3010585B2 (en) Developing device
JPH02181758A (en) Method for recovering developer in developing device
JPH0542441Y2 (en)
JPS59140472A (en) Developing device for copying machine
JPH0155453B2 (en)
JPS6318374A (en) Developing device
JPS6022362Y2 (en) magnetic brush developing device
JPS628176A (en) Dry type developing device
JPH0155454B2 (en)