JPS6333155B2 - - Google Patents
Info
- Publication number
- JPS6333155B2 JPS6333155B2 JP7061479A JP7061479A JPS6333155B2 JP S6333155 B2 JPS6333155 B2 JP S6333155B2 JP 7061479 A JP7061479 A JP 7061479A JP 7061479 A JP7061479 A JP 7061479A JP S6333155 B2 JPS6333155 B2 JP S6333155B2
- Authority
- JP
- Japan
- Prior art keywords
- rotating brush
- bristles
- photoreceptor
- wear
- cleaning
- 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
- 238000004140 cleaning Methods 0.000 claims description 17
- 108091008695 photoreceptors Proteins 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 description 5
- 210000004209 hair Anatomy 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
- G03G21/0035—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a brush; Details of cleaning brushes, e.g. fibre density
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cleaning In Electrography (AREA)
Description
【発明の詳細な説明】
本発明は電子写真複写機の感光体をクリーニン
グする方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of cleaning a photoreceptor of an electrophotographic copying machine.
転写式の電子写真複写機は、感光体表面に形成
したトナー像をコピー用紙に転写してコピーを得
ると共に、転写後の感光体は、残留トナーを除去
し、除電して反復使用する。この残留トナーの除
去、すなわちクリーニングの方法の一つとして、
回転ブラシを用いる方法がある。この方法は、感
光体表面に残留せるトナーを回転ブラシにより掃
き取り、該ブラシに付着せるトナーをフリツカー
バーによつて叩き出すものである。 A transfer-type electrophotographic copying machine transfers a toner image formed on the surface of a photoreceptor onto copy paper to obtain a copy, and the photoreceptor after the transfer is repeatedly used after removing residual toner and neutralizing the charge. One way to remove this residual toner, that is, to clean it, is to
There is a method using a rotating brush. In this method, toner remaining on the surface of the photoreceptor is swept away with a rotating brush, and toner adhering to the brush is knocked out with a flicker bar.
第１図は前記方法のクリーニング装置を示すも
のである。１は矢印Ａ方向に回転するドラム状の
感光体であつて、その表面には、トナー２が残留
している。３は回転ブラシであつて、矢印Ｂ方向
に回転し、その毛４が感光体１の表面からトナー
２を掃き取る。回転ブラシ３はケーシング５内に
収められ、ケーシング５は、感光体１との対向部
分において、開口している。このケーシング５
は、図示しない空気吸引装置と連結されている。
６は、ケーシング５内に固定したフリツカーバー
であつて、回転中の毛４に衝突して、毛４に付着
せるトナー２′を叩き出す。トナー２′は、前記空
気吸引装置による気流に乗つて搬送される。 FIG. 1 shows a cleaning device for the method described above. Reference numeral 1 denotes a drum-shaped photoreceptor that rotates in the direction of arrow A, and toner 2 remains on the surface of the drum-shaped photoreceptor. A rotating brush 3 rotates in the direction of arrow B, and its bristles 4 sweep away the toner 2 from the surface of the photoreceptor 1. The rotating brush 3 is housed in a casing 5, and the casing 5 is open at a portion facing the photoreceptor 1. This casing 5
is connected to an air suction device (not shown).
Reference numeral 6 denotes a flicker bar fixed within the casing 5, which collides with the rotating bristles 4 and knocks out the toner 2' adhering to the bristles 4. The toner 2' is conveyed by the airflow generated by the air suction device.
ところで、毛４は、感光体１、ケーシング５、
フリツカーバー６にそれぞれ接触するため摩耗
し、このクリーニング装置の性能は使用時間と共
に低下する。第２図はその様子を示すものであつ
て、グラフ（）はクリーニング性能の変化を初
期値を100％として表わしたものであり、グラフ
（）は、回転ブラシ３を回転するために要する
トルクの変化を初期値を100％として表わしたも
のであり、グラフ（）は、回転ブラシ３の毛４
の平均長さの変化を表わしたものである。グラフ
（）で示されるクリーニング性能の低下は、グ
ラフ（）で示される毛４の摩耗によるものであ
り、それに伴なつて、回転ブラシ３を回転するた
めのトルクもグラフ（）で示すように低下す
る。 By the way, the hair 4 includes the photoreceptor 1, the casing 5,
Each contact with the fritscar bar 6 causes wear, and the performance of this cleaning device deteriorates with time of use. Figure 2 shows this situation, where the graph () shows the change in cleaning performance with the initial value set at 100%, and the graph () shows the torque required to rotate the rotating brush 3. The change is expressed with the initial value as 100%, and the graph () is
This represents the change in the average length of . The decrease in cleaning performance shown in graph () is due to wear of the bristles 4 shown in graph (), and along with this, the torque for rotating the rotating brush 3 also decreases as shown in graph (). do.
このクリーニング性能の低下を補償するために
回転ブラシ３を毛４の摩耗に応じて感光体１に接
近させる方法が提案されている。しかし、毛４の
摩耗状態は、当初t1の時点で、第３図ａに示すよ
うに長さl1で揃つていたものが、t2の時点では、
それが摩耗して、第３図ｂに示すように平均長さ
l2になるが、すべての毛４がl2の長さになるので
はなく、その何％かは初期の長さl1を保つてお
り、不揃いになる。したがつて、この回転ブラシ
３を感光体１に接近させると、毛足の長い毛が感
光体１に強く接触して、それを劣化させる。ま
た、回転ブラシ３の移動は機構的に複雑になる。 In order to compensate for this decrease in cleaning performance, a method has been proposed in which the rotating brush 3 is moved closer to the photoreceptor 1 according to the wear of the bristles 4. However, the wear condition of the bristles 4 is that at the time t1 , the length l1 was initially uniform as shown in FIG. 3a, but at the time t2 ,
It wears down to an average length as shown in Figure 3b.
However, rather than all the hairs 4 having a length of l 2 , some percentage of them maintain the initial length l 1 and become irregular. Therefore, when the rotating brush 3 is brought close to the photoreceptor 1, the long bristles come into strong contact with the photoreceptor 1, deteriorating it. Furthermore, the movement of the rotating brush 3 becomes mechanically complicated.
本発明は、前記欠点のないクリーニング方法を
提供することを目的とするものであつて、回転ブ
ラシの回転速度を、毛の摩耗に応じて速くなるよ
うに変化させることを特徴とするものである。 The present invention aims to provide a cleaning method that does not have the above-mentioned drawbacks, and is characterized in that the rotation speed of the rotating brush is changed to increase in accordance with the wear of the bristles. .
第１図の７は、可変変速機構であつて、モータ
ー８からの回転を、これにより変速した上で回転
ブラシ３に伝える。可変変速機構７の調整は、毛
４の摩耗に応じて行なうが、この調整はトルクの
変化を検出して自動的に行なうことができ、コピ
ー枚数をカウントして、それに応じて行つてもよ
い。また、その調整を無段階に行なつてもよい
が、段階的に行つてもよく、時間の経過によつて
決めても良い。 Reference numeral 7 in FIG. 1 is a variable speed change mechanism, which changes the speed of the rotation from the motor 8 and then transmits it to the rotating brush 3. Adjustment of the variable speed change mechanism 7 is performed according to the wear of the bristles 4, but this adjustment can be performed automatically by detecting changes in torque, or may be performed according to the number of copies. . In addition, the adjustment may be made steplessly, stepwise, or may be determined based on the passage of time.
このように、回転ブラシ３の回転速度を毛４の
摩耗に応じて速めると、同一時間内に毛４が感光
体１を掃く回数が増加するため、毛４の摩耗によ
るクリーニング性能の低下を補償することができ
る。また、回転速度の増加に伴なつて、毛４に作
用する遠心力が増大し、毛４が感光体１に接触す
る圧力も増大するので、それによつてもクリーニ
ング性能の低下が補償される。 In this way, when the rotational speed of the rotating brush 3 is increased according to the wear of the bristles 4, the number of times the bristles 4 sweep the photoreceptor 1 within the same time increases, thereby compensating for the decrease in cleaning performance due to the wear of the bristles 4. can do. Further, as the rotational speed increases, the centrifugal force acting on the bristles 4 increases, and the pressure with which the bristles 4 contact the photoreceptor 1 also increases, which also compensates for the decrease in cleaning performance.
第４図は、本発明によるクリーニング性能を補
償措置を講じないものと比較して示すものであつ
て、補償措置を講じない場合には、グラフ（）
で示すように時点t3でクリーニング限界を示すグ
ラフ（）と交叉し、回転ブラシの寿命が終るの
に対し、本発明により段階的に回転ブラシ３の回
転速度を上昇させる方法、あるいは連続的に回転
速度を上昇させる方法で補償したものは、それぞ
れ、グラフ（）、（）で示すように、性能低下
が少なく、寿命が延長される。 FIG. 4 shows the cleaning performance of the present invention in comparison with that without compensatory measures.
As shown in the graph () indicating the cleaning limit at time t 3 , the life of the rotating brush ends. Compensation by increasing the rotational speed results in less performance degradation and longer life, as shown in graphs () and (), respectively.
本発明は以上のように、回転ブラシの毛の摩耗
によるクリーニング性能の低下を、回転ブラシの
回転速度を高めることにより補償するもので、き
わめて簡単に実施でき、感光体を損傷することな
く、回転ブラシの寿命を延長することができる。 As described above, the present invention compensates for the reduction in cleaning performance due to abrasion of the bristles of the rotating brush by increasing the rotation speed of the rotating brush.It is extremely easy to implement, and the cleaning performance is compensated for by increasing the rotation speed of the rotating brush. It can extend the life of the brush.
第１図は本発明を実施するクリーニング装置の
正面図、第２図はクリーニング性能の経時変化を
示すグラフ、第３図は毛の摩耗状態を示す拡大
図、第４図は本発明によるクリーニング性能の経
時変化を示すグラフである。
１……感光体、３……回転ブラシ、４……毛、
７……可変変速機構。
Fig. 1 is a front view of a cleaning device implementing the present invention, Fig. 2 is a graph showing changes in cleaning performance over time, Fig. 3 is an enlarged view showing the wear state of bristles, and Fig. 4 is a cleaning performance according to the present invention. It is a graph showing the change over time. 1... Photoreceptor, 3... Rotating brush, 4... Hair,
7...Variable transmission mechanism.
Claims (1)
グを行なう方法において、回転ブラシの毛の摩耗
に応じて、回転ブラシの回転速度を高めることを
特徴とする感光体のクリーニング方法。1. A method for cleaning a photoreceptor by bringing a rotating brush into contact with the photoreceptor, the method comprising increasing the rotational speed of the rotating brush in accordance with wear of the bristles of the rotating brush.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7061479A JPS55163565A (en) | 1979-06-07 | 1979-06-07 | Cleaning method of photoreceptor |
| DE19803021159 DE3021159A1 (en) | 1979-06-07 | 1980-06-04 | Residual toner cleaner for photocopier - relates cleaning brush speed to bristle wear for constant efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7061479A JPS55163565A (en) | 1979-06-07 | 1979-06-07 | Cleaning method of photoreceptor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55163565A JPS55163565A (en) | 1980-12-19 |
| JPS6333155B2 true JPS6333155B2 (en) | 1988-07-04 |
Family
ID=13436648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7061479A Granted JPS55163565A (en) | 1979-06-07 | 1979-06-07 | Cleaning method of photoreceptor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS55163565A (en) |
| DE (1) | DE3021159A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5652945A (en) * | 1996-05-20 | 1997-07-29 | Xerox Corporation | Automatic measurement of cleaning brush nip width for process control and/or diagnostics |
| JP4623922B2 (en) * | 2002-06-27 | 2011-02-02 | 株式会社リコー | Image forming apparatus |
| US8036561B2 (en) * | 2008-03-10 | 2011-10-11 | Xerox Corporation | Method and apparatus for cleaning |
-
1979
- 1979-06-07 JP JP7061479A patent/JPS55163565A/en active Granted
-
1980
- 1980-06-04 DE DE19803021159 patent/DE3021159A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3021159A1 (en) | 1980-12-11 |
| DE3021159C2 (en) | 1982-05-27 |
| JPS55163565A (en) | 1980-12-19 |
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