JPS636748Y2 - - Google Patents
Info
- Publication number
- JPS636748Y2 JPS636748Y2 JP1981059658U JP5965881U JPS636748Y2 JP S636748 Y2 JPS636748 Y2 JP S636748Y2 JP 1981059658 U JP1981059658 U JP 1981059658U JP 5965881 U JP5965881 U JP 5965881U JP S636748 Y2 JPS636748 Y2 JP S636748Y2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- sleeve
- opening
- powder developer
- powder
- 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
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
【考案の詳細な説明】
本考案は複写機あるいはフアクシミリ等の静電
荷像現像装置における粉体現像剤供給装置に関す
るものであり、特に粉体現像剤供給口に開閉蓋を
設け、この蓋の開閉を制御することにより現像
点１の磁力の強さ、整形ギヤツプd′の大きさ、
現像剤収納タンク６およびその供給口７の形
状、整形片８の長さおよび傾き等があげられ
る。その他に変動要因として現像剤収納タンク
６内の現像剤の量、環境の温度・湿度等があ
る。このような各種の要因を考慮してもなお、現
像剤の減少量と供給量を等しくさせることはむず
かしい問題であつた。この減少量と供給量にアン
バランスがあると、スリーブ１における現像剤の
減少量よりも供給量のほうが小であると、現像点
５において十分な現像が行なわれず、減少量より
も供給量のほうが大であると、現像点５において
過剰となつた現像剤が記録紙４の裏側に回り込ん
で記録紙４を汚す等の欠点が表出する。[Detailed description of the invention] The present invention relates to a powder developer supply device for an electrostatic image developing device such as a copying machine or a facsimile machine. By controlling the strength of the magnetic force at development point 1, the size of the shaping gap d',
Examples include the shape of the developer storage tank 6 and its supply port 7, the length and inclination of the shaping piece 8, and the like. Other variable factors include the amount of developer in the developer storage tank 6 and the temperature and humidity of the environment. Even when such various factors are considered, it is still difficult to make the amount of developer supply equal to the amount of developer decrease. If there is an imbalance between this decrease amount and the supply amount, and the supply amount is smaller than the developer decrease amount in the sleeve 1, sufficient development will not be performed at the development point 5, and the supply amount will be smaller than the decrease amount. If it is larger, there will be problems such as excess developer at the development point 5 getting around to the back side of the recording paper 4 and staining the recording paper 4.
本考案は上記の欠点を解消するためになされた
ものであり、スリーブ外周の現像剤の量を検出
し、現像剤供給量を制御することにより現像点に
おける現像剤の過不足状態を無くすことを可能に
した粉体現像剤供給装置を提供することを目的と
している。 The present invention was developed to eliminate the above-mentioned drawbacks, and detects the amount of developer on the outer periphery of the sleeve and controls the amount of developer supplied to eliminate the situation of excess or shortage of developer at the development point. The object of the present invention is to provide a powder developer supply device that makes it possible.
以下本考案の詳細について実施例を示す図面と
ともに説明する。第２図においては本考案の一実
施例を示すものであるが、第１図と共通する素子
については同一番号を付す。固定された円筒形ス
リーブ２０２内部に回転駆動するマグネツトロー
ル２０１を配置する。スリーブ２０２付近には粉
体現像剤２０３を収納した粉体現像剤収納タンク
２０６を設ける。その下方に供給口２０７が在
り、開閉蓋２０９が取り付けられている。開閉蓋
２０９はワイヤー２０１によつてソレノイド２１
１の軸２１２に連結されている。供給口２０７か
らスリーブ２０２方向にはガラスあるいはアクリ
ル等の透明部材からなる整形片２０８が設けられ
ている。この整形片２０８はスリーブ２０２との
間に整形ギヤツプｄを形成するだけでなく、供給
口２０７からスリーブ２０２への現像剤供給経路
を兼ねている。整形片２０８の下方裏側には光セ
ンサー２１３が設置されており、整形片２０８を
挾んで対向した位置には光源２１４が固定されて
いる。光センサー２１３はコンパレータ２１５、
積分回路２１６、コンパレータ２１７、タイマー
２１８を介してソレノイド２１１に電気的に接続
されている。一方スリーブ２０２において、現像
剤収納タンク２０６とは別の近傍に用紙ガイド２
１９が固定され、このガイドに沿つて記録紙２０
４が搬送される。 The details of the present invention will be explained below with reference to drawings showing embodiments. FIG. 2 shows one embodiment of the present invention, and elements common to those in FIG. 1 are given the same numbers. A rotatably driven magnet roll 201 is placed inside a fixed cylindrical sleeve 202. A powder developer storage tank 206 containing powder developer 203 is provided near the sleeve 202 . A supply port 207 is located below it, and an opening/closing lid 209 is attached. The opening/closing lid 209 is connected to the solenoid 21 by the wire 201.
1 shaft 212 . A shaping piece 208 made of a transparent material such as glass or acrylic is provided in the direction from the supply port 207 to the sleeve 202 . This shaping piece 208 not only forms a shaping gap d with the sleeve 202, but also serves as a developer supply path from the supply port 207 to the sleeve 202. An optical sensor 213 is installed on the lower back side of the shaping piece 208, and a light source 214 is fixed at a position opposite to the shaping piece 208. The optical sensor 213 is a comparator 215,
It is electrically connected to the solenoid 211 via an integrating circuit 216, a comparator 217, and a timer 218. On the other hand, in the sleeve 202, a paper guide 2 is provided near the developer storage tank 206.
19 is fixed, and the recording paper 20 is moved along this guide.
4 is transported.
次に動作を説明する。マグネツトロール２０１
が矢印Ａ方向に回転するとスリーブ２０２の外周
の現像剤（磁性体）が矢印Ｂ方向に移動し、静電
荷像の記録された記録紙２０４を現像点２０５に
おいて摺擦する。現像剤は静電荷像に付着するた
め、スリーブ２０２の外周の現像剤は減少する。 Next, the operation will be explained. magnet roll 201
When the sleeve 202 rotates in the direction of arrow A, the developer (magnetic material) on the outer periphery of the sleeve 202 moves in the direction of arrow B and rubs against the recording paper 204 on which the electrostatic charge image is recorded at the development point 205. Since the developer adheres to the electrostatic charge image, the amount of developer on the outer periphery of the sleeve 202 decreases.
一方、供給口２０７の開閉蓋２０９は通常閉じ
ているため、整形片２０８上の現像剤も徐々に減
少する。光源２１４は常に光センサー２１３方向
を照射しているため、整形片２０８上の現像剤の
減少により、光センサー２１３は徐々に受光する
ようになる。光センサー２１３の出力信号S1はコ
ンパレータ２１５に入力され、設定電圧を越える
とコンパレータ２１５の出力信号S2がローレベル
からハイレベルに切換わる。信号S2はさらに積分
回路２１６に入力され出力信号S3を得る。信号S3
はコンパレータ２１７に入力されて２値の出力信
号S4に変換される。信号S4の変化点においてタイ
マー２１８を動作させ、その出力信号S5によりソ
レノイド２１１のスイツチングを行なう。第３図
は上記の信号S1〜S5の時間関係を示すものであ
る。 On the other hand, since the opening/closing lid 209 of the supply port 207 is normally closed, the developer on the shaping piece 208 also gradually decreases. Since the light source 214 always emits light in the direction of the optical sensor 213, as the amount of developer on the shaping piece 208 decreases, the optical sensor 213 gradually begins to receive light. The output signal S 1 of the optical sensor 213 is input to the comparator 215, and when the set voltage is exceeded, the output signal S 2 of the comparator 215 switches from low level to high level. The signal S 2 is further input to an integrating circuit 216 to obtain an output signal S 3 . Signal S 3
is input to the comparator 217 and converted into a binary output signal S4 . The timer 218 is operated at the change point of the signal S4 , and the solenoid 211 is switched based on the output signal S5 . FIG. 3 shows the time relationship of the above signals S1 to S5 .
以上の動作から明らかなように、整形片２０８
上の現像剤が減少し、光源２１４の光を光センサ
ー２１３が一定時間検知するとソレノイド２１１
を動作させ、その軸２１２および連結するワイヤ
ー２１０さらに開閉蓋２０９を引き上げ、供給口
２０７を開口させる。その結果現像剤２０３が整
形片２０８に供給され、さらにマグネツトロール
２０１の磁力によつてスリーブ２０２方向に引き
付けられる。この現像剤はスリーブ２０２外周を
移動しながらスリーブ２０２外周面にある現像剤
の量を全体に増加させる。一定時間経過するとソ
レノイド２１１の動作は終了し、開閉蓋２０９の
自重によつて供給口は閉じる。供給口２０７の開
口時間はタイマー２１８によつて自由に設定でき
るので実験的に最適時間を決定すればよい。現像
を継続すれば上記の動作が繰り返し行なわれ、現
像点２０５における現像剤の過剰あるいは不足が
起こることはない。 As is clear from the above operation, the shaping piece 208
When the upper developer decreases and the optical sensor 213 detects the light from the light source 214 for a certain period of time, the solenoid 211
is operated, the shaft 212 and the connecting wire 210 are pulled up, and the opening/closing lid 209 is pulled up to open the supply port 207. As a result, the developer 203 is supplied to the shaping piece 208 and is further attracted toward the sleeve 202 by the magnetic force of the magnet roll 201. This developer moves around the outer periphery of the sleeve 202 and increases the amount of developer on the outer periphery of the sleeve 202 as a whole. After a certain period of time has elapsed, the operation of the solenoid 211 is completed, and the supply port is closed by the weight of the opening/closing lid 209. Since the opening time of the supply port 207 can be freely set using the timer 218, the optimum time can be determined experimentally. If the development is continued, the above-mentioned operation will be repeated, and there will be no excess or shortage of developer at the development point 205.
なお、以上は、整形板上の現像剤の有無により
ソレノイドを動作させているが、通常の検知手段
（例えば反射型のセンサ）によりスリーズ上の現
像剤の有無により、ソレノイドを動作させてもか
まわない。 In addition, although the solenoid is operated according to the presence or absence of developer on the forming plate in the above, the solenoid may be operated depending on the presence or absence of developer on the sleaze using normal detection means (for example, a reflective sensor). do not have.
以上述べた如く本考案によれば、静電荷現像装
装置内の粉体現像剤収納タンクに開閉蓋を設け、
整形板上あるいはスリーブ外周上に存在する現像
剤の量により開閉蓋の開閉を制御するため、スリ
ーブ外周上にある現像剤の量は安定している。そ
のため現像剤が過剰あるいは不足となることがな
い。 As described above, according to the present invention, the powder developer storage tank in the electrostatic charge developing device is provided with an opening/closing lid,
Since the opening and closing of the lid is controlled based on the amount of developer present on the shaping plate or the outer circumference of the sleeve, the amount of developer present on the outer circumference of the sleeve is stable. Therefore, there will be no excess or shortage of developer.
第１図は従来の静電荷像現像装置の略構成図、
第２図は本考案の一実施例の静電荷像現像装置の
略構成図、第３図は第２図の動作を示す時間関係
図である。
２０１……マグネツトロール、２０２……スリ
ーブ、２０３……粉体現像剤、２０９……開閉
蓋、２１１……ソレノイド、２１３……光センサ
ー、２１４……光源。
FIG. 1 is a schematic diagram of a conventional electrostatic image developing device.
FIG. 2 is a schematic configuration diagram of an electrostatic image developing apparatus according to an embodiment of the present invention, and FIG. 3 is a time relationship diagram showing the operation of FIG. 2. 201... magnet roll, 202... sleeve, 203... powder developer, 209... opening/closing lid, 211... solenoid, 213... light sensor, 214... light source.
Claims (1)
と、前記記録媒体に粉体現像剤を供給する円筒状
のスリーブと、前記スリーブ内に設けたマグネツ
トロールと、前記スリーブ上の粉体現像剤の量を
規制する整形板と、前記整形板に対して粉体現像
剤を供給する開口部を有する粉体現像剤収納タン
クと、前記開口部の開閉蓋と、前記整形板上の粉
体現像剤の量を検知する検知手段と、前記検知手
段の出力信号に従つて開閉蓋の開閉駆動を行う駆
動手段とを設け、前記スリーブとマグネツトロー
ラは相対的に回転することを特徴とする粉体現像
剤供給装置。 A recording medium on which an electrostatic charge image is formed, a powder developer, a cylindrical sleeve for supplying the powder developer to the recording medium, a magnet roll provided in the sleeve, and a powder on the sleeve. a powder developer storage tank having an opening for supplying the powder developer to the shaping plate; a lid for opening and closing the opening; A detecting means for detecting the amount of powder developer and a driving means for driving the opening/closing lid to open and close according to an output signal of the detecting means are provided, and the sleeve and the magnetic roller rotate relative to each other. Powder developer supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981059658U JPS636748Y2 (en) | 1981-04-23 | 1981-04-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981059658U JPS636748Y2 (en) | 1981-04-23 | 1981-04-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56172859U JPS56172859U (en) | 1981-12-21 |
| JPS636748Y2 true JPS636748Y2 (en) | 1988-02-26 |
Family
ID=29654133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981059658U Expired JPS636748Y2 (en) | 1981-04-23 | 1981-04-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS636748Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6056064U (en) * | 1983-09-24 | 1985-04-19 | カシオ計算機株式会社 | developing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS601621B2 (en) * | 1976-07-22 | 1985-01-16 | 株式会社リコー | Developer replenishment device |
-
1981
- 1981-04-23 JP JP1981059658U patent/JPS636748Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56172859U (en) | 1981-12-21 |
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