JPH01188877A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH01188877A JPH01188877A JP63012295A JP1229588A JPH01188877A JP H01188877 A JPH01188877 A JP H01188877A JP 63012295 A JP63012295 A JP 63012295A JP 1229588 A JP1229588 A JP 1229588A JP H01188877 A JPH01188877 A JP H01188877A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- tank
- wall
- shaft
- abutted
- 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
Links
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000004904 shortening Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000843 powder Substances 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］ 本発明は電子写真式印刷装置、特に現像装置に関する。[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD This invention relates to electrophotographic printing devices, and more particularly to development devices.
［従来の技術１
この種の現像装置はトナータンク内のトナーを撹拌し、
トナータンク内のトナーが自重により凝縮することを防
止する必要がある。従来はトナータンク内に撹拌羽根を
回転させてトナーを撹拌させている。[Prior art 1] This type of developing device stirs the toner in the toner tank,
It is necessary to prevent the toner in the toner tank from condensing due to its own weight. Conventionally, a stirring blade is rotated inside the toner tank to stir the toner.
［発明が解決しようとする課題］
しかし、これではトナータンク内のトナータンクされた
トナーは撹拌羽根の回転半径近傍のみのものだけが撹拌
されるだけとなり、撹拌羽根の届かない上部のトナーは
自重により凝縮し、トナータンク内のソフトブロック発
生を誘発するものとなってしまう。このソフトブロック
発生をなくすためにトナータンクの形状を変更すること
が考えられるが、トナータンク形状の決定にあたっては
トナーが自重により落下するトナーの安息角を保つ必要
があること、及び撹拌羽根の回転半径を保つこと等の事
情により制約されてしまい、自由な設計を行うことがで
きなかった。[Problems to be Solved by the Invention] However, in this case, only the toner in the toner tank near the rotation radius of the stirring blade is stirred, and the toner in the upper part where the stirring blade cannot reach is due to its own weight. This causes condensation and induces the generation of soft blocks in the toner tank. In order to eliminate the occurrence of soft blocks, it is possible to change the shape of the toner tank, but when determining the shape of the toner tank, it is necessary to maintain the angle of repose of the toner as it falls due to its own weight, and the rotation of the stirring blade. Due to constraints such as maintaining the radius, it was not possible to design freely.
本発明の目的は前記課題を解消し、トナータンクの形状
の如何に拘らず、トナーを十分に撹拌できるようにした
現像装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a developing device that can sufficiently agitate toner regardless of the shape of the toner tank.
［課題を解決するための手段］
上記目的を達成するため、本発明の現像装置においては
、トナー充填用タンク内にシャフトを回動可能に軸支し
、該シャフトに、タンク内壁に当接した際に一部が屈曲
して実効半径が短縮する撹拌羽根を装着したものである
。[Means for Solving the Problems] In order to achieve the above object, in the developing device of the present invention, a shaft is rotatably supported in a toner filling tank, and the shaft is in contact with an inner wall of the tank. It is equipped with a stirring blade whose effective radius is shortened when a part of it bends.
［実施例］ 以下、本発明の一実施例を図により説明する。[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示す断面図、第２図は撹拌
羽根を示す図である。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a diagram showing a stirring blade.
第１図において、トナーを充填するトナータンク１の底
部開口部１ａに、磁気ローラを内蔵し磁力にてトナーを
周面に吸着するスリーブ３を回動可能に設置する。２は
スリーブ３の周面に吸着するトナー量を規制するドクタ
ーブレードである。また、スリーブ３の近傍には、スリ
ーブ３上の１〜ナーかその周面の静電潜像に付着される
像担持体を設置する。In FIG. 1, a sleeve 3, which has a built-in magnetic roller and attracts toner to its circumferential surface by magnetic force, is rotatably installed in the bottom opening 1a of a toner tank 1 filled with toner. A doctor blade 2 regulates the amount of toner adsorbed onto the circumferential surface of the sleeve 3. Further, an image carrier is installed near the sleeve 3 to be attached to an electrostatic latent image on the circumferential surface of 1 to 3 on the sleeve 3.
本発明はトナータンク１内にシャフト５を回動可能に軸
支し、該シャフト５に、タンク内壁に当接した際に一部
が屈曲して実効半径が短縮する撹拌羽根４を装着したも
ので必る。前記撹拌羽根４は２枚の羽根ユニット４ａ、
４ｂからなり、一方の羽根ユニット４ａはシャフト５
に一体に装着され、他方の羽根ユニット４ｂは一方の羽
根ユニット４ａにバネリング６にて屈曲可能に連結され
ている。In the present invention, a shaft 5 is rotatably supported in a toner tank 1, and a stirring blade 4 is attached to the shaft 5, which partially bends when it comes into contact with the inner wall of the tank and shortens its effective radius. It is necessary. The stirring blade 4 includes two blade units 4a,
4b, one blade unit 4a is connected to the shaft 5
The other blade unit 4b is bendably connected to one blade unit 4a by a spring ring 6.
したかつて、本発明によれば、第１図に示すようにシャ
フト５に一体にｇ看した羽根ユニット４ａは円の軌跡Ｓ
１を描きつつトナーを撹拌するが、他方の羽根ユニツｌ
へ４ｂはタンクの内壁に当接した際にバネリング６の部
分より屈曲し、タンク内壁を倣って回転し、タンク内壁
から離れた位置で復元して軌跡Ｓ２を描きつつトナーを
撹拌する。そのため、トナータンク１の形状の如何に拘
らず、タンク１内のトナーを全体的に撹拌することとな
る。According to the present invention, as shown in FIG.
The toner is stirred while drawing 1, but the other blade unit l
When the spring 4b comes into contact with the inner wall of the tank, it bends from the spring ring 6, rotates following the inner wall of the tank, returns to its original position at a position away from the inner wall of the tank, and stirs the toner while drawing a trajectory S2. Therefore, regardless of the shape of the toner tank 1, the toner in the tank 1 is entirely stirred.
［発明の効果］
以上説明したように本発明はトナータンク内のトナーの
撹拌を行う撹拌羽根がその回転半径を変動させることが
でき、トナータンク形状にかかわらすトナーを全体的に
撹拌でき、したかつてトナータンク内でトナーの凝縮を
防止して粉末状態を維持でき、印字品質を向上できる効
果を有するものである。[Effects of the Invention] As explained above, the present invention is capable of varying the radius of rotation of the stirring blade that stirs the toner in the toner tank, and is capable of stirring the entire toner regardless of the shape of the toner tank. This has the effect of preventing the toner from condensing in the toner tank and maintaining the powder state, thereby improving printing quality.
第１図【よ本発明の一実施例を示す断面図、第２図は撹
拌羽根を示す図である。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a view showing a stirring blade.
Claims (1)
し、該シャフトに、タンク内壁に当接した際に一部が屈
曲して実効半径が短縮する撹拌羽根を装着したことを特
徴とする現像装置。1. A shaft is rotatably supported in a toner filling tank, and a stirring blade is attached to the shaft, which partially bends when it comes into contact with the inner wall of the tank, shortening its effective radius. developing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63012295A JPH01188877A (en) | 1988-01-22 | 1988-01-22 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63012295A JPH01188877A (en) | 1988-01-22 | 1988-01-22 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01188877A true JPH01188877A (en) | 1989-07-28 |
Family
ID=11801338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63012295A Pending JPH01188877A (en) | 1988-01-22 | 1988-01-22 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01188877A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670530A2 (en) * | 1994-03-03 | 1995-09-06 | Kyocera Corporation | Toner storage unit, residual toner collect unit, toner container with these units and image forming apparatus with such toner container |
| US5619312A (en) * | 1993-11-10 | 1997-04-08 | Sharp Kabushiki Kaisha | Developing device with developer-supplying mechanism |
-
1988
- 1988-01-22 JP JP63012295A patent/JPH01188877A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619312A (en) * | 1993-11-10 | 1997-04-08 | Sharp Kabushiki Kaisha | Developing device with developer-supplying mechanism |
| EP0670530A2 (en) * | 1994-03-03 | 1995-09-06 | Kyocera Corporation | Toner storage unit, residual toner collect unit, toner container with these units and image forming apparatus with such toner container |
| EP0670530A3 (en) * | 1994-03-03 | 1996-10-02 | Kyocera Corp | Toner storage unit, residual toner collect unit, toner container with these units and image forming apparatus with such toner container. |
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