JPH07281511A - Electrostatic charging device - Google Patents

Electrostatic charging device

Info

Publication number
JPH07281511A
JPH07281511A JP6075177A JP7517794A JPH07281511A JP H07281511 A JPH07281511 A JP H07281511A JP 6075177 A JP6075177 A JP 6075177A JP 7517794 A JP7517794 A JP 7517794A JP H07281511 A JPH07281511 A JP H07281511A
Authority
JP
Japan
Prior art keywords
load
charge wire
driving
wire
charge
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
JP6075177A
Other languages
Japanese (ja)
Inventor
Eiji Nemoto
本 栄 治 根
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6075177A priority Critical patent/JPH07281511A/en
Publication of JPH07281511A publication Critical patent/JPH07281511A/en
Pending legal-status Critical Current

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  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To detect the disconnection of a charger wire by use of a wire cleaner. CONSTITUTION:The device is provided with an electrostatic charger including a wire 1, a cleaning member for cleaning the wire and a driving means 6 for driving in an extending direction of the wire 1 at a 1st position where the cleaning member does not substantially come in contact with the wire 1 and a driving means 12 for driving at a 2nd position where the cleaning member substantially comes in contact with the wire 1, means 12 and 13 for detecting the load of the driving means, a memory means 13 for storing the detection load If obtained while the driving means is operated with the cleaning member positioned at the 1st position, a disconnection detecting means 13 for generating information on wire disconnection when the detection load Ir obtained while the driving means is operated with the cleaning member positioned at the 2nd position is equal to or below a value which is obtained by adding the load If stored by the memory means 13 to a set value I, and also, the device is provided with a means 17 for informing of the information on the wire disconnection.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、チャ−ジワイヤおよび
それを清掃する自動清掃機構を備える帯電装置に関す
る。この種の帯電装置は、例えば、複写機,ファクシミ
リあるいはレ−ザプリンタに用いられる。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device and a charging device having an automatic cleaning mechanism for cleaning the charging wire. This type of charging device is used, for example, in a copying machine, a facsimile or a laser printer.

【0002】[0002]

【従来の技術】この種の帯電装置は、様々なものが公知
であり、例えば複写機においては、感光体を荷電又は除
電するチャ−ジャあるいは感光体上のトナ−像を記録紙
に転写する転写器もしくは感光体から記録紙を分離する
分離器に用いられている。例えば特開平1−26167
6号公報には、チャ−ジワイヤおよびワイヤクリ−ナを
備える帯電器と、チャ−ジワイヤのリ−クを検出する手
段と、リ−ク検出に応答してワイヤクリ−ナを動作させ
る動作指示手段を備える帯電装置が提示されている。実
開昭62−176854号公報には、帯電器のケ−シン
グを清掃する部材を駆動する電気モ−タの負荷電流を監
視してそれにより清掃部材の反転位置到達を検知する帯
電装置が提示されている。
2. Description of the Related Art Various charging devices of this type are known. For example, in a copying machine, a charger for charging or discharging a photosensitive member or a toner image on the photosensitive member is transferred onto a recording sheet. It is used in a transfer device or a separator for separating recording paper from a photoconductor. For example, JP-A-1-26167
No. 6 discloses a charger having a charge wire and a wire cleaner, means for detecting a leak of the charge wire, and operation instruction means for operating the wire cleaner in response to the leak detection. A charging device provided is presented. Japanese Unexamined Utility Model Publication No. 62-176854 presents a charging device that monitors the load current of an electric motor that drives a member for cleaning the casing of a charger and detects the reaching of the reversal position of the cleaning member thereby. Has been done.

【0003】[0003]

【発明が解決しようとする課題】上述のごとき、チャ−
ジワイヤを用いる帯電装置では、チャ−ジワイヤが断線
することがあるが、従来の帯電装置では、チャ−ジワイ
ヤのリ−ク検出は行なってもそれが汚れによるものか断
線によるものかの区別がつかない。一方、チャ−ジャク
リ−ナを駆動する電気モ−タの負荷電流を監視して、そ
れが上昇するとクリ−ナが走行反転位置に到達したと
か、ホ−ムポジションに戻ったとか、あるいはチャ−ジ
ワイヤに汚物が付着している、と判定し、そこでクリ−
ナを反転駆動するとか、駆動を停止するとかが行なわれ
ているが、チャ−ジワイヤの断線についての処理は行な
われていない。
As described above, the char
In a charging device using a jiwire, the charge wire may be broken, but in the conventional charging device, it is possible to detect whether the charge wire is leaked or not due to dirt or broken wire. Absent. On the other hand, the load current of the electric motor driving the charger cleaner is monitored, and when it rises, the cleaner has reached the running reversal position, returned to the home position, or the charger. It is judged that there is dirt on the wire, and there
Although the inverter is driven in reverse or the driving is stopped, the process for disconnecting the charge wire is not performed.

【0004】本発明は、チャ−ジャクリ−ナを用いてチ
ャ−ジワイヤの断線を検出することを目的とする。
An object of the present invention is to detect a disconnection of a charge wire by using a charger cleaner.

【0005】[0005]

【課題を解決するための手段】本発明の第1番の発明の
帯電装置は、チヤージワイヤ(1),これを清掃する清掃
部材(3)、および、該清掃部材(3)をチャ−ジワイヤ(1)
に実質上接触しない第1位置において、チャ−ジワイヤ
(1)が延びる方向に駆動し、また、チャ−ジワイヤ(1)に
実質上接触する第2位置において駆動する駆動手段(4〜
6,12)を含む帯電器;前記駆動手段(4〜6,12)の負荷を検
出する手段(12,13);前記駆動手段(4〜6,12)による、清
掃部材(3)を第1位置においた駆動の間の前記負荷検出
手段(12,13)が検出した負荷(IF)を記憶するメモリ手段
(13);前記駆動手段(4〜6,12)による、清掃部材(3)を第
2位置においた駆動の間の前記負荷検出手段(12,13)が
検出した負荷(IR)が前記メモリ手段(13)に記憶している
負荷(IF)に設定値(I)を加えた値以下のときチャ−ジワ
イヤ断線情報を発生する断線検出手段(13);および、前
記チャ−ジワイヤ断線情報を報知する手段(17);を備え
る。
The charging device according to the first aspect of the present invention is a charge wire (1), a cleaning member (3) for cleaning the charge wire (1), and a charging wire (3) for the cleaning member (3). 1)
In the first position where it does not substantially contact the charger wire
Driving means (4 to 4) for driving in the direction in which (1) extends and at a second position where it substantially contacts the charge wire (1)
Charger (6, 12); means (12, 13) for detecting the load of the driving means (4-6, 12); cleaning means (3) by the driving means (4-6, 12) Memory means for storing the load (IF) detected by the load detecting means (12, 13) during driving in the 1-position
(13); The load (IR) detected by the load detection means (12, 13) during the drive by the drive means (4 to 6, 12) with the cleaning member (3) in the second position is the memory. Disconnection detection means (13) for generating charge wire disconnection information when the load (IF) stored in the means (13) is less than or equal to a value obtained by adding the set value (I); and the charge wire disconnection information. A means (17) for notifying is provided.

【0006】本願の第2番の発明の帯電装置は、チヤー
ジワイヤ(1),これを清掃する清掃部材(3)、および、該
清掃部材(3)をチャ−ジワイヤ(1)に実質上接触しない第
1位置において、チャ−ジワイヤ(1)が延びる方向に駆
動し、また、チャ−ジワイヤ(1)に実質上接触する第2
位置において駆動する駆動手段(4〜6,12)を含む帯電
器;前記チャ−ジャワイヤ(3)のリ−クを検出する手段
(11,13);前記駆動手段(4〜6,12)の負荷を検出する手段
(12,13);前記駆動手段(4〜6,12)による、清掃部材(3)
を第1位置においた駆動の間の前記負荷検出手段(12,1
3)が検出した負荷(IF)を記憶するメモリ手段(13);前記
駆動手段(4〜6,12)による、清掃部材(3)を第1位置にお
いた駆動の間の前記リ−クの検出に応答して前記駆動手
段(4〜6,12)の駆動方向を反転して清掃部材(3)を第2位
置においた駆動に切換える手段(13);前記駆動手段(4〜
6,12)による、清掃部材(3)を第2位置においた駆動の間
の前記負荷検出手段(12,13)が検出した負荷(IR)が前記
メモリ手段(13)に記憶している負荷(IF)に設定値(I)を
加えた値以下のときチャ−ジワイヤ断線情報を発生する
断線検出手段(13);および、前記チャ−ジワイヤ断線情
報を報知する手段(17);を備える。
The charging device of the second invention of the present application is such that the charge wire (1), the cleaning member (3) for cleaning the charge wire (1), and the cleaning member (3) do not substantially contact the charge wire (1). A second position which, in the first position, is driven in the direction in which the charge wire (1) extends and which is substantially in contact with the charge wire (1);
Charger including driving means (4-6, 12) for driving in position; means for detecting leak of the charger wire (3)
(11,13); means for detecting the load of the drive means (4 to 6,12)
(12, 13); Cleaning member (3) by the driving means (4 to 6, 12)
The load detecting means (12, 1
Memory means (13) for storing the load (IF) detected by (3); the drive means (4-6, 12) to move the cleaning member (3) to the first position during the drive of the leak. A means (13) for switching the cleaning member (3) to a drive in the second position by reversing the driving direction of the driving means (4-6, 12) in response to the detection;
The load (IR) detected by the load detecting means (12, 13) during the driving of the cleaning member (3) in the second position by the load (6, 12) stored in the memory means (13). A disconnection detecting means (13) for generating charge wire disconnection information when it is less than or equal to (IF) plus a set value (I); and means (17) for notifying the charge wire disconnection information.

【0007】本発明の第3番の発明の帯電装置は、チヤ
ージワイヤ(1),これを清掃する清掃部材(3)、および、
該清掃部材(3)をチャ−ジワイヤ(1)に実質上接触しない
第1位置において、チャ−ジワイヤ(1)が延びる方向に
駆動し、また、チャ−ジワイヤ(1)に実質上接触する第
2位置において駆動する駆動手段(4〜6,12)を含む帯電
器;該帯電器に荷電電圧を印加するチャ−ジャ電源回路
(11);前記帯電器に荷電電圧を印加しているときのチャ
−ジワイヤ(1)のリ−クを検出する手段(11,13);該リ−
クの検出に応答して、前記駆動手段(4〜6,12)を介して
前記清掃部材(3)をチャ−ジワイヤ(1)が延びる方向に
往,復駆動する制御手段(13);前記駆動手段(4〜6,12)
の負荷を検出する手段(11,13);前記駆動手段(4〜6,12)
による、清掃部材(3)を第1位置においた駆動の間の前
記負荷検出手段(11,13)が検出した負荷(IF)を記憶する
メモリ手段(13);前記駆動手段(4〜6,12)による、清掃
部材(3)を第2位置においた駆動の間の前記負荷検出手
段(12,13)が検出した負荷(IR)が前記メモリ手段(13)に
記憶している負荷(IF)に設定値(I)を加えた値以下のと
きチャ−ジワイヤ断線情報を発生する断線検出手段(1
3);および、前記チャ−ジワイヤ断線情報を報知する手
段(17);を備える。
The charging device according to the third aspect of the present invention is a charge wire (1), a cleaning member (3) for cleaning the charge wire (1), and
In the first position where the cleaning member (3) is not substantially in contact with the charge wire (1), the cleaning member (3) is driven in the extending direction of the charge wire (1), and is in contact with the charge wire (1) substantially. Charger including drive means (4-6, 12) driven in two positions; Charger power supply circuit for applying a charging voltage to the charger
(11); Means (11, 13) for detecting a leak of the charge wire (1) when a charging voltage is applied to the charger;
Control means (13) for moving the cleaning member (3) forward and backward in the direction in which the charge wire (1) extends through the drive means (4 to 6, 12) in response to the detection of the mark; Drive means (4 to 6,12)
Means (11, 13) for detecting the load of the drive means (4-6, 12)
Memory means (13) for storing the load (IF) detected by the load detecting means (11, 13) during the driving of the cleaning member (3) at the first position by the drive means (4-6, The load (IR) detected by the load detecting means (12, 13) during the driving of the cleaning member (3) in the second position by the load (IF) stored in the memory means (13) (IF). Disconnection detection means that generates charge wire disconnection information when the value is less than or equal to the sum of the set value (I)
3); and means (17) for notifying the charge wire disconnection information.

【0008】なお、カッコ内には、理解を容易にするた
めに、図面に示し後述する実施例の対応要素又は対応事
項を、参考までに付記した。
In order to facilitate understanding, corresponding elements or corresponding matters in the embodiments shown in the drawings and described later are added in parentheses for reference.

【0009】[0009]

【作用】本発明の第1番〜第3番の発明の帯電装置によ
れば、駆動手段(4〜6,12)が、清掃部材(3)をチャ−ジワ
イヤ(1)に実質上接触しない第1位置においてチャ−ジ
ワイヤ(1)が延びる方向に駆動し、また、チャ−ジワイ
ヤ(1)に実質上接触する第2位置において駆動する。チ
ャ−ジワイヤ(1)が断線していない場合には、チャ−ジ
ワイヤを第1位置においた駆動において駆動負荷は軽
く、第2位置においた駆動において駆動負荷が重いが、
チャ−ジワイヤ(1)が断線していると、チャ−ジワイヤ
を第1位置においた駆動と第2位置に置いた駆動の間
で、駆動負荷の差が実質上なくなる。本願の各発明はこ
れに着目してチャ−ジワイヤ(1)の断線を自動検出する
ものである。
According to the charging device of the first to third aspects of the present invention, the driving means (4 to 6, 12) do not substantially bring the cleaning member (3) into contact with the charge wire (1). In the first position, the charge wire (1) is driven in the extending direction, and in the second position where it is substantially in contact with the charge wire (1). If the charge wire (1) is not broken, the drive load is light when driving the charge wire in the first position and heavy when driving in the second position,
When the charge wire (1) is broken, there is substantially no difference in drive load between the drive in which the charge wire is in the first position and the drive in which the charge wire is in the second position. Focusing on this, each invention of the present application automatically detects the disconnection of the charge wire (1).

【0010】すなわち、負荷検出手段(12,13)が駆動手
段(4〜6,12)の負荷を検出し、メモリ手段(13)が、駆動
手段(4〜6,12)による、清掃部材(3)を第1位置においた
駆動の間の負荷(IF)を記憶し、断線検出手段(13)が、清
掃部材(3)を第2位置においた駆動の間の検出負荷(IR)
がメモリ手段(13)に記憶している負荷(IF)に設定値(I)
を加えた値以下のときチャ−ジワイヤ断線情報を発生す
る。そして、報知手段(17)が、チャ−ジワイヤ断線情報
を報知する。
That is, the load detecting means (12, 13) detects the load of the driving means (4-6, 12), and the memory means (13) causes the cleaning member (4) by the driving means (4-6, 12). 3) memorize the load (IF) during the drive in the first position, and the disconnection detection means (13) detects the load (IR) during the drive in which the cleaning member (3) is in the second position.
Set value (I) in the load (IF) stored in the memory means (13)
Charge wire disconnection information is generated when the value is less than or equal to the value obtained by adding. Then, the notification means (17) notifies the charge wire disconnection information.

【0011】したがって本願の各発明によれば、定常的
にはチャ−ジワイヤのクリ−ニングが自動的に行なわ
れ、クリ−ニング動作中に自動的にチャ−ジワイヤの断
線が検出され、報知される。
Therefore, according to the inventions of the present application, the cleaning of the charge wire is automatically performed steadily, and the disconnection of the charge wire is automatically detected and notified during the cleaning operation. It

【0012】本願の各発明の他の目的および特徴は、図
面を参照した以下の実施例の説明より明らかになろう。
Other objects and features of each invention of the present application will be apparent from the following description of embodiments with reference to the drawings.

【0013】[0013]

【実施例】図1に一実施例の帯電器を、図2にそれを装
着した電子写真方式の複写機のプリンタ部の外観を、図
3に該帯電器の一部分の外観を、図4に該帯電器に接続
された電気要素を、そして図5および図6に、図4に示
す制御部13の制御動作を示す。帯電器は、図1〜図3
に示すように、チヤージワイヤ1,筐体に接続されてい
る導電性部材であるケーシング2,チヤージワイヤ1の
清掃のためのクリーナパッド3,クリーナパッド3を保
持するためのクリーナホルダ4,クリーナホルダ4をチ
ヤージワイヤ1に沿って移動させるための送りネジ5,
クリーナ駆動モータ6,ウォーム7およびウォ−ムギア
8によって構成されている。クリーナホルダ4のクリー
ナ駆動モータ6側の位置がクリーナホルダ4の待機位置
(ホ−ムポジション)であり、帯電器のクリーナ駆動モ
ータ6と反対側の位置がクリーナホルダ4の動作折り返
し位置(リタ−ンポジション)である。ここでは、待機
位置から折り返し位置への方向をフォワード方向と、折
り返し位置から待機位置への方向をリターン方向と称す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the charger of one embodiment, FIG. 2 shows the appearance of the printer section of an electrophotographic copying machine equipped with the charger, FIG. 3 shows the appearance of part of the charger, and FIG. The electric elements connected to the charger and the control operation of the control unit 13 shown in FIG. 4 are shown in FIGS. The charger is shown in FIGS.
As shown in FIG. 1, a charge wire 1, a casing 2 which is a conductive member connected to the housing, a cleaner pad 3 for cleaning the charge wire 3, a cleaner holder 4 for holding the cleaner pad 4, and a cleaner holder 4 are provided. Lead screw 5, for moving along the charge wire 1.
The cleaner drive motor 6, the worm 7, and the worm gear 8 are used. The position of the cleaner holder 4 on the cleaner drive motor 6 side is the standby position (home position) of the cleaner holder 4, and the position of the charger opposite to the cleaner drive motor 6 is the operation return position (return position) of the cleaner holder 4. Position). Here, the direction from the standby position to the folding position is called the forward direction, and the direction from the folding position to the standby position is called the return direction.

【0014】クリーナ駆動モータ6がCCW(反時計)
方向に回転すると、ウォーム7およびウォ−ムギア8を
介して送りネジ5が回転し、クリーナホルダ4をフォワ
ード方向へ移動させ、クリーナ駆動モータ6がCW(時
計)方向に回転するとクリーナホルダ4をリターン方向
へ移動させる。
The cleaner drive motor 6 is CCW (counterclockwise)
When the cleaner drive motor 6 rotates in the CW (clockwise) direction, the feed screw 5 rotates through the worm 7 and the worm gear 8 to move the cleaner holder 4 in the forward direction. Move in the direction.

【0015】送りネジ5の回転によりクリ−ナホルダ4
には回動力が加わり、この実施例では、この回動力によ
り、ホルダ4をフォワ−ド駆動しているときには、ホル
ダ4は図1の(b)に示すように、そのパッド3がチャ
−ジワイヤ1から離れる姿勢(第1位置)となり、ホル
ダ4をリタ−ン駆動しているときには、ホルダ4は図1
の(c)に示すように、そのパッド3がチャ−ジワイヤ
1から離れる姿勢(第2位置)となる。なお、図1の
(b)および(c)は、図1の(a)に示すホルダ4の
下面を示す。すなわち、フォワ−ド駆動ではパッド3に
よるチャ−ジワイヤ1のクリ−ニングは行なわれない
が、リタ−ン駆動中にパッド3がチャ−ジワイヤ1に接
触してそれをクリ−ニングする。
The cleaner holder 4 is rotated by the rotation of the feed screw 5.
In this embodiment, when the holder 4 is forward-driven by this turning force, the holder 4 has its pad 3 with the charge wire as shown in FIG. 1 (b). When the holder 4 is returned to the position (first position) away from the position 1 and the holder 4 is driven to return,
As shown in (c), the pad 3 is in a posture (second position) away from the charge wire 1. 1 (b) and 1 (c) show the lower surface of the holder 4 shown in FIG. 1 (a). That is, while the forward drive does not clean the charge wire 1 by the pad 3, the pad 3 contacts the clean wire 1 and cleans it during the return drive.

【0016】図4を参照すると、チャ−ジャ電源回路1
1がチャ−ジワイヤ1に帯電電圧を出力していると、出
力電流が検出抵抗Rを通り、これによる検出抵抗Rの電
圧(検出電圧)がA/Dコンバータ16に入力される。
なお、この実施例では帯電電圧は負である。通常、A/
D変換された値を目標電圧と等しくなるように制御する
ことにより定電流制御(または定電圧制御)されるわけ
であるが、帯電器の負荷等の異常により、出力がリー
ク、あるいは短絡すると負荷電流が正常時よりも極端に
増加したり、連続的ではなくなり、結果的に検出電圧が
異常値となる。制御部13がこの異常値を検知してリー
クおよび出力短絡を検出する。
Referring to FIG. 4, a charger power supply circuit 1
When 1 outputs the charging voltage to the charge wire 1, the output current passes through the detection resistor R, and the voltage (detection voltage) of the detection resistor R by this is input to the A / D converter 16.
The charging voltage is negative in this embodiment. Usually A /
Constant current control (or constant voltage control) is performed by controlling the D-converted value to be equal to the target voltage. However, if the output of the charger leaks or is short-circuited due to an abnormality in the charger, the load The current increases extremely more than normal or becomes non-continuous, resulting in an abnormal detected voltage. The control unit 13 detects this abnormal value and detects a leak and an output short circuit.

【0017】制御部13はさらに、クリーナホルダ駆動
モータ6の電流を電圧に変換しA/D変換して読込む。
待機位置と折り返し位置においてクリーナホルダ4がロ
ックした場合にはロック電流(高負荷電流)が流れるの
で、制御部13は、モータ6の電流を監視して待機位置
と折り返し位置を検知する。フォワード動作中にロック
電流を検出した場合にはそこは折り返し位置であるの
で、モ−タ6の回転方向をそこで反転する。リターン動
作中にロック電流を検出した場合にはそこは待機位置で
あるので、そこでモ−タ6の駆動を停止する。
The control unit 13 further converts the current of the cleaner holder drive motor 6 into a voltage, A / D converts it, and reads it.
When the cleaner holder 4 is locked at the standby position and the return position, a lock current (high load current) flows, so the control unit 13 monitors the current of the motor 6 to detect the standby position and the return position. When the lock current is detected during the forward operation, it is at the turn-back position, and therefore the rotation direction of the motor 6 is reversed there. When the lock current is detected during the return operation, it is at the standby position, and the drive of the motor 6 is stopped at that position.

【0018】制御部13は、CPUを主体とするもので
あり、チャ−ジワイヤ1をクリ−ニングすべきタイミン
グになると、図5に示す制御動作を行なう。まず、クリ
ーナモータ6をフォワード方向に駆動させる。そしてチ
ャ−ジャ電源回路11の抵抗Rの電圧を繰返し読込んで
それがリ−クレベル以上であるか否かを監視しつつ、モ
−タドライバ12の中の電流検知回路(図示せず)より
測定されるクリーナモータ6の電流値Ifを、レジスタ
IF(制御部13のCPUの内部メモリの一領域,以下
同様)に格納する(S1,S2)。
The control unit 13 is mainly composed of a CPU, and performs the control operation shown in FIG. 5 at the timing of cleaning the charge wire 1. First, the cleaner motor 6 is driven in the forward direction. Then, while repeatedly reading the voltage of the resistor R of the charger power supply circuit 11 to monitor whether or not it is above the leak level, it is measured by a current detection circuit (not shown) in the motor driver 12. The current value If of the cleaner motor 6 is stored in the register IF (one area of the internal memory of the CPU of the control unit 13, hereinafter the same) (S1, S2).

【0019】なお、リ−クを検知すると、そこでチャー
ジャクリーナモータ6の駆動をリターン方向に反転切換
えして逆回転させ、その負荷電流が安定すると、クリー
ナモータ6の電流値IrをレジスタIRに格納し(S1
0)、フォワ−ド方向時とリターン方向時の電流値IF
(レジスタIFのデ−タ),IR(レジスタIRのデ−
タ)を比較する(S11)。ここでIFとIRの関係
は、リターン時に清掃動作を行うために、チャ−ジワイ
ヤ1が断線していないときには、次式の関係が成り立
つ。
When a leak is detected, the drive of the charger cleaner motor 6 is reversely switched to the return direction and rotated in the reverse direction. When the load current becomes stable, the current value Ir of the cleaner motor 6 is stored in the register IR. (S1
0), current value IF in forward and return directions
(Register IF data), IR (register IR data)
Are compared (S11). Here, the relationship between IF and IR is as follows when the charge wire 1 is not broken because the cleaning operation is performed at the time of return.

【0020】 IR>IF+I, I:定数 ・・・(1) チャ−ジワイヤ1が断線していると、フォワ−ド方向時
とリターン方向時の電流値IF,IRが実質上等しくな
り、IR≒IF、すなわちIR≦IF+Iとなる。制御
部13のCPUは、IR>IF+Iの間はリタ−ン駆動
を継続し、ホルダ4が待機位置に戻ると、そこでモ−タ
6の駆動を停止する(S9)。待機位置にホルダ4が戻
るまでにIR>IF+Iが成立しなくなると、すなわち
IR≦IF+Iとなると、制御部13のCPUはワイヤ
断線表示信号を発生してこれを表示部17に与え、表示
部17がワイヤ断線を表示する(S11,S12)。
IR> IF + I, I: constant (1) When the charge wire 1 is broken, the current values IF and IR in the forward direction and the return direction become substantially equal, and IR≈ IF, that is, IR ≦ IF + I. The CPU of the controller 13 continues the return drive while IR> IF + I, and when the holder 4 returns to the standby position, stops the drive of the motor 6 (S9). If IR> IF + I is not satisfied before the holder 4 returns to the standby position, that is, IR ≦ IF + I, the CPU of the control unit 13 generates a wire disconnection display signal and gives it to the display unit 17, and the display unit 17 Displays the wire breakage (S11, S12).

【0021】さて、クリ−ナホルダ4を反転位置まで駆
動する(S3,S4)間にリ−クを検知しなかった場合
には、制御部13のCPUは、ホルダ4が反転位置に到
達するとモータ6の駆動をリターン方向に反転切換えし
て逆回転させ(S5)、クリーナモータ6の電流値Ir
をレジスタIRに格納し(S6)、チャ−ジャ電源回路
11の抵抗Rの電圧を読込んでそれがリ−クレベル以上
であるか否かを監視しつつ(S7)、クリ−ナホルダ4
を待機位置まで駆動し待機位置で停止する(S8,S
9)。
If no leak is detected while the cleaner holder 4 is driven to the reversing position (S3, S4), the CPU of the control unit 13 causes the motor when the holder 4 reaches the reversing position. 6 is driven in the reverse direction to reverse the rotation (S5), and the current value Ir of the cleaner motor 6 is changed.
Is stored in the register IR (S6), the voltage of the resistor R of the charger power supply circuit 11 is read and it is monitored whether or not it is above the leak level (S7), and the cleaner holder 4
Drive to the standby position and stop at the standby position (S8, S
9).

【0022】なお、このリタ−ン駆動の間にリ−クを検
知すると、フォワ−ド方向時とリターン方向時の電流値
IF,IRを比較する(S11)。そしてIR>IF+
Iの間はリタ−ン駆動を継続し、ホルダ4が待機位置に
戻ると、そこでモ−タ6の駆動を停止する(S9)。待
機位置にホルダ4が戻るまでにIR>IF+Iが成立し
なくなると、すなわちIR≦IF+Iとなると、制御部
13のCPUはワイヤ断線表示信号を発生してこれを表
示部17に与え、表示部17がワイヤ断線を表示する
(S11,S12)。
When a leak is detected during this return drive, the current values IF and IR in the forward direction and in the return direction are compared (S11). And IR> IF +
During I, the return drive is continued, and when the holder 4 returns to the standby position, the drive of the motor 6 is stopped there (S9). If IR> IF + I is not satisfied before the holder 4 returns to the standby position, that is, IR ≦ IF + I, the CPU of the control unit 13 generates a wire disconnection display signal and gives it to the display unit 17, and the display unit 17 Displays the wire breakage (S11, S12).

【0023】以上に説明したクリ−ナホルダ4の1往復
動は、チャ−ジワイヤ1の汚れによる帯電ムラを防止す
るためのものであり、所定枚数の画像形成動作終了後
に、制御部13が自動的に行なう。画像形成中の帯電出
力時にクリ−ナホルダ4が待機位置を外れていると異常
画像となるので、クリ−ナホルダ4の1往復動の間は画
像形成動作は開始しない。クリ−ナホルダ4の1往復動
の中のフォワ−ド駆動ではチャ−ジワイヤ1のクリ−ニ
ングは行なわれず、モ−タ6の負荷電流IFが制御部1
3のCPU(のレジスタIF)にメモリされ、リタ−ン
駆動中にチャ−ジワイヤ1のクリ−ニングが行なわれ、
しかもリ−クの有無がチェックされて、リ−クがあると
モ−タ3の負荷電流IRがIR>IF+I(断線なし)
であるかチェックされて、IR≦IF+Iであるとワイ
ヤ断線が表示される。これらは制御部13によりすべて
自動的に行なわれる。すなわち、チャ−ジワイヤ1の断
線検知が、クリ−ニングのためのパッド4の1往復動の
間に行なわれるので、断線検知が早い。
The one reciprocating movement of the cleaner holder 4 described above is for preventing uneven charging due to dirt on the charger wire 1, and the controller 13 automatically performs the operation after a predetermined number of image forming operations are completed. To do. If the cleaner holder 4 is out of the standby position at the time of charging output during image formation, an abnormal image results, so the image forming operation is not started during one reciprocating movement of the cleaner holder 4. In forward drive during one reciprocating movement of the cleaner holder 4, the charging wire 1 is not cleaned, and the load current IF of the motor 6 is controlled by the controller 1.
3 (register IF) of the CPU, the charge wire 1 is cleaned during the return drive,
Moreover, the presence or absence of a leak is checked, and if there is a leak, the load current IR of the motor 3 is IR> IF + I (no disconnection).
Is checked, and if IR ≦ IF + I, a wire break is displayed. These are all automatically performed by the control unit 13. That is, disconnection detection of the charge wire 1 is performed during one reciprocating movement of the pad 4 for cleaning, so that disconnection detection is quick.

【0024】図4に示す制御部13のCPUは、コピ−
処理中には図6に示すリ−ク監視を行なう。すなわち、
帯電器のチャ−ジワイヤ1に、チャ−ジャ電源回路11
により帯電電圧を印加している間、回路11の抵抗Rの
電圧を繰返し読込んで、それがリ−クレベルであるかを
チェックする(S21)。そしてリークを検知すると、
クリーナモータ6をCCW(反時計)方向に動作させる
とともに、T1時限のタイマTをスタートさせる(S2
1,22)。そして、タイマTがタイムオ−バするまで
(クリ−ナホルダ4が所定距離進む間)、モータ電流値
Ifを繰返し読込んでレジスタIFに更新記憶する(S
23)。タイマTがタイムオ−バすると、クリーナモー
タ6を逆回転(CW方向)駆動して(S24,S2
5)、クリ−ナホルダ4が待機位置に戻るまで、モータ
電流値Irを繰返し読込んでレジスタIRに更新記憶す
る(S26)。そしてクリ−ナホルダ4が待機位置に戻
ると、クリーナモータ6を停止し、IR>IF+I(断
線なし)であるかチェックして(S29)、IR≦IF
+Iであるとワイヤ断線信号を発生して表示器17に与
えて、表示器17にワイヤ断線を表示する(S30)。
The CPU of the control unit 13 shown in FIG.
During processing, leak monitoring shown in FIG. 6 is performed. That is,
The charger power supply circuit 11 is connected to the charger wire 1 of the charger.
While the charging voltage is being applied, the voltage of the resistor R of the circuit 11 is repeatedly read to check whether it is at the leak level (S21). And when a leak is detected,
The cleaner motor 6 is operated in the CCW (counterclockwise) direction, and the timer T for the T1 time period is started (S2
1, 22). Then, until the timer T times out (while the cleaner holder 4 advances a predetermined distance), the motor current value If is repeatedly read and updated and stored in the register IF (S).
23). When the timer T time-overs, the cleaner motor 6 is driven in reverse rotation (CW direction) (S24, S2).
5) Until the cleaner holder 4 returns to the standby position, the motor current value Ir is repeatedly read and updated and stored in the register IR (S26). Then, when the cleaner holder 4 returns to the standby position, the cleaner motor 6 is stopped and it is checked whether IR> IF + I (no disconnection) (S29), IR ≦ IF.
If it is + I, a wire disconnection signal is generated and given to the display unit 17, and the wire disconnection is displayed on the display unit 17 (S30).

【0025】これにより、コピ−処理中にも、リ−クを
検知したときには自動的に断線検出が行なわれる。
As a result, disconnection is automatically detected when a leak is detected during the copy process.

【0026】[0026]

【発明の効果】従来の帯電チャージワイヤの自動清掃装
置は清掃動作を目的としたものであるが、本発明によれ
ば、チャージャワイヤの断線検知を併せ持つことによ
り、複写機等の故障の原因が帯電装置のワイヤ切れに原
因があるものかどうかをすばやく検知することが出来
る。
The conventional automatic charging charge wire cleaning device is intended for cleaning operation. However, according to the present invention, since the charger wire disconnection detection is also provided, the cause of failure of a copying machine or the like can be prevented. It is possible to quickly detect whether or not the wire breakage of the charging device is the cause.

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

【図1】 (a)は本発明の一実施例の帯電器の構成を
示す斜視図であり、(b)は(a)に示すクリ−ナホル
ダ4の、フォワ−ド駆動中の下面を示す底面図、(c)
は(a)に示すクリ−ナホルダ4の、リタ−ン駆動中の
下面を示す底面図である。
FIG. 1A is a perspective view showing a configuration of a charger according to an embodiment of the present invention, and FIG. 1B shows a lower surface of a cleaner holder 4 shown in FIG. 1A during forward driving. Bottom view, (c)
FIG. 6 is a bottom view showing the lower surface of the cleaner holder 4 shown in FIG.

【図2】 図1の(a)に示す帯電器を組込んだプリン
タの外観を示す斜視図である。
FIG. 2 is a perspective view showing an external appearance of a printer incorporating the charger shown in FIG.

【図3】 図1の(a)に示す帯電器の一部を拡大して
示す斜視図である。
FIG. 3 is an enlarged perspective view showing a part of the charger shown in FIG.

【図4】 図1の(a)に示す帯電器に接続された電気
回路を示すブロック図である。
FIG. 4 is a block diagram showing an electric circuit connected to the charger shown in FIG.

【図5】 図4に示す制御部13の、所定枚数のコピ−
終了毎に実行するクリ−ニング制御動作を示すフロ−チ
ャ−トである。
FIG. 5 shows a copy of a predetermined number of copies of the control unit 13 shown in FIG.
6 is a flowchart showing a cleaning control operation executed at each end.

【図6】 図4に示す制御部13の、コピ−処理中のリ
−ク監視動作を示すフロ−チャ−トである。
FIG. 6 is a flowchart showing a leak monitoring operation of the control unit 13 shown in FIG. 4 during copy processing.

【符号の説明】[Explanation of symbols]

1:チャージワイヤ 2:ケーシング 3:クリーナパッド 4:クリーナホルダ 5:送りネジ 6:クリーナ駆動モ
ータ 7:ウォームギア 8:ギア
1: Charge wire 2: Casing 3: Cleaner pad 4: Cleaner holder 5: Feed screw 6: Cleaner drive motor 7: Worm gear 8: Gear

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】チヤージワイヤ,これを清掃する清掃部
材、および、該清掃部材をチャ−ジワイヤに実質上接触
しない第1位置において、チャ−ジワイヤが延びる方向
に駆動し、また、チャ−ジワイヤに実質上接触する第2
位置において駆動する駆動手段を含む帯電器;前記駆動
手段の負荷を検出する手段;前記駆動手段による、清掃
部材を第1位置においた駆動の間の前記負荷検出手段が
検出した負荷を記憶するメモリ手段;前記駆動手段によ
る、清掃部材を第2位置においた駆動の間の前記負荷検
出手段が検出した負荷が前記メモリ手段に記憶している
負荷に設定値を加えた値以下のときチャ−ジワイヤ断線
情報を発生する断線検出手段;および、 前記チャ−ジワイヤ断線情報を報知する手段;を備える
帯電装置。
1. A charge wire, a cleaning member for cleaning the charge wire, and a cleaning member which is driven in a direction in which the charge wire extends in a first position where the charge member is not substantially in contact with the charge wire. Second contact on top
A charger including drive means for driving at a position; a means for detecting a load on the drive means; a memory for storing the load detected by the load detection means during the drive by the drive means while the cleaning member is in the first position Charge wire when the load detected by the load detecting means during the driving of the cleaning member to the second position by the drive means is less than or equal to the load stored in the memory means plus a set value. A charging device comprising: a disconnection detecting means for generating disconnection information; and a means for notifying the charge wire disconnection information.
【請求項2】チヤージワイヤ,これを清掃する清掃部
材、および、該清掃部材をチャ−ジワイヤに実質上接触
しない第1位置において、チャ−ジワイヤが延びる方向
に駆動し、また、チャ−ジワイヤに実質上接触する第2
位置において駆動する駆動手段を含む帯電器;前記チャ
−ジャワイヤのリ−クを検出する手段;前記駆動手段の
負荷を検出する手段;前記駆動手段による、清掃部材を
第1位置においた駆動の間の前記負荷検出手段が検出し
た負荷を記憶するメモリ手段;前記駆動手段による、清
掃部材を第1位置においた駆動の間の前記リ−クの検出
に応答して前記駆動手段の駆動方向を反転して清掃部材
を第2位置においた駆動に切換える手段;前記駆動手段
による、清掃部材を第2位置においた駆動の間の前記負
荷検出手段が検出した負荷が前記メモリ手段に記憶して
いる負荷に設定値を加えた値以下のときチャ−ジワイヤ
断線情報を発生する断線検出手段;および、 前記チャ−ジワイヤ断線情報を報知する手段;を備える
帯電装置。
2. A charge wire, a cleaning member for cleaning the charge wire, and a first position where the charge member is not substantially in contact with the charge wire. The charge wire is driven in a direction in which the charge wire extends and the charge wire is substantially attached to the charge wire. Second contact on top
A charger including driving means for driving in a position; a means for detecting a leak of the charger wire; a means for detecting a load on the driving means; a driving operation of the cleaning means in the first position by the driving means. Memory means for storing the load detected by the load detecting means; inversion of the driving direction of the driving means in response to the detection of the leak by the driving means while driving the cleaning member at the first position. And a means for switching the cleaning member to drive in the second position; a load detected by the load detection means during the drive by the drive means in which the cleaning member is in the second position is stored in the memory means. A charging device comprising: a disconnection detecting means for generating charge wire disconnection information when the value is equal to or less than a value obtained by adding a set value to the charge wire; and a means for notifying the charge wire disconnection information.
【請求項3】チヤージワイヤ,これを清掃する清掃部
材、および、該清掃部材をチャ−ジワイヤに実質上接触
しない第1位置において、チャ−ジワイヤが延びる方向
に駆動し、また、チャ−ジワイヤに実質上接触する第2
位置において駆動する駆動手段を含む帯電器;該帯電器
に荷電電圧を印加するチャ−ジャ電源回路;前記帯電器
に荷電電圧を印加しているときのチャ−ジャのリ−クを
検出する手段;該リ−クの検出に応答して、前記駆動手
段を介して前記清掃部材をチャ−ジワイヤが延びる方向
に往,復駆動する制御手段;前記駆動手段の負荷を検出
する手段;前記駆動手段による、清掃部材を第1位置に
おいた駆動の間の前記負荷検出手段が検出した負荷を記
憶するメモリ手段;前記駆動手段による、清掃部材を第
2位置においた駆動の間の前記負荷検出手段が検出した
負荷が前記メモリ手段に記憶している負荷に設定値を加
えた値以下のときチャ−ジワイヤ断線情報を発生する断
線検出手段;および、 前記チャ−ジワイヤ断線情報を報知する手段;を備える
帯電装置。
3. A charge wire, a cleaning member for cleaning the charge wire, and a cleaning member for driving the charge member in a direction in which the charge member extends in a first position where the charge member does not substantially contact the charge wire. Second contact on top
Charger including driving means for driving at a position; charger power supply circuit for applying a charging voltage to the charger; means for detecting a leak of the charger when a charging voltage is applied to the charger Control means for moving the cleaning member forward and backward in the direction in which the charge wire extends through the drive means in response to the detection of the leak; means for detecting the load of the drive means; the drive means The memory means for storing the load detected by the load detecting means during the driving of the cleaning member in the first position; the load detecting means during the driving of the cleaning member in the second position by the driving means. Disconnection detecting means for generating charge wire disconnection information when the detected load is equal to or less than a value obtained by adding a set value to the load stored in the memory means; and means for notifying the charge wire disconnection information. Electrifying device.
JP6075177A 1994-04-13 1994-04-13 Electrostatic charging device Pending JPH07281511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6075177A JPH07281511A (en) 1994-04-13 1994-04-13 Electrostatic charging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6075177A JPH07281511A (en) 1994-04-13 1994-04-13 Electrostatic charging device

Publications (1)

Publication Number Publication Date
JPH07281511A true JPH07281511A (en) 1995-10-27

Family

ID=13568672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6075177A Pending JPH07281511A (en) 1994-04-13 1994-04-13 Electrostatic charging device

Country Status (1)

Country Link
JP (1) JPH07281511A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142866A (en) * 2012-01-12 2013-07-22 Fuji Xerox Co Ltd Cleaning device and image forming apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142866A (en) * 2012-01-12 2013-07-22 Fuji Xerox Co Ltd Cleaning device and image forming apparatus

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