JPH0221586B2 - - Google Patents
Info
- Publication number
- JPH0221586B2 JPH0221586B2 JP58025277A JP2527783A JPH0221586B2 JP H0221586 B2 JPH0221586 B2 JP H0221586B2 JP 58025277 A JP58025277 A JP 58025277A JP 2527783 A JP2527783 A JP 2527783A JP H0221586 B2 JPH0221586 B2 JP H0221586B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- conductive support
- electrophotographic copying
- copying machine
- corona discharger
- 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 - Lifetime
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 19
- 238000000691 measurement method Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 description 6
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0266—Arrangements for controlling the amount of charge
-
- 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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】
(1) 技術分野
本発明はコロナ放電器の放電時に感光体を介し
てアースに流れる電流を容易かつ安全に測定でき
るようにした電子写真複写機およびそのコロナ放
電電流測定方式に関する。[Detailed Description of the Invention] (1) Technical Field The present invention relates to an electrophotographic copying machine that makes it possible to easily and safely measure the current flowing to the ground through a photoreceptor during discharge of a corona discharger, and its corona discharge current measurement. Regarding the method.
(2) 従来技術
従来の電子写真複写機として、例えば、第１図
イ，ロに示すものがあり、軸受支持板１に支持さ
れた軸２に感光体ドラム３が回転的に支持されて
おり、感光体ドラム３の周囲に除電ランプ４、帯
電コロナ放電器５、露光スリツト６、現像機７、
転写コロナ放電器８、分離コロナ放電器９、除電
コロナ放電器１０、清掃器１１が設けられてい
る。感光体ドラム３は、第２図イに示すように、
感光体層３ａと導電性支持体３ｂより構成され、
導電性支持体３ｂは軸２、軸受支持板１、フレー
ム２０を介してアースされている。(2) Prior Art As a conventional electrophotographic copying machine, for example, there is one shown in FIG. , a static elimination lamp 4, a charging corona discharger 5, an exposure slit 6, a developing device 7,
A transfer corona discharger 8, a separation corona discharger 9, a static elimination corona discharger 10, and a cleaner 11 are provided. As shown in FIG. 2A, the photoreceptor drum 3 is
Consisting of a photoreceptor layer 3a and a conductive support 3b,
The conductive support 3b is grounded via the shaft 2, the bearing support plate 1, and the frame 20.
以上の構成において、帯電コロナ放電器８等の
各放電器の放電電流を測定する操作を説明すると
次の通りである。第２図イに示すように、感光体
ドラム３を軸２から離脱した後、電気絶縁性取付
部１２ａと、該取付部１２ａに設けられ感光体ド
ラム３の表面と同一位置になる表面に設けられた
導電性１２ｂより構成される治具１２を軸２に取
り付け、導電性１２ｂとアース間に電流計１４を
挿入して高圧電源１３をオンすることによつて導
電体１２ｂからアースに流れる放電電流ieを測定
することができる。また軸２を所定の角度回転す
ることによつて、転写コロナ放電器８、分離コロ
ナ放電器９、除電コロナ放電器１０についても、
同じように導電体１２ｂからアースに流れる放電
電流ieを測定することができる。 In the above configuration, the operation of measuring the discharge current of each discharge device such as the charging corona discharge device 8 will be explained as follows. As shown in FIG. 2A, after the photoreceptor drum 3 is removed from the shaft 2, an electrically insulating mounting portion 12a and a surface provided on the mounting portion 12a at the same position as the surface of the photoreceptor drum 3 are provided. By attaching the jig 12 made of the conductive material 12b to the shaft 2, inserting the ammeter 14 between the conductive material 12b and the ground, and turning on the high voltage power supply 13, the electric discharge flowing from the electrical conductor 12b to the ground can be detected. The current i e can be measured. Furthermore, by rotating the shaft 2 by a predetermined angle, the transfer corona discharger 8, the separation corona discharger 9, and the static elimination corona discharger 10 can also be
Similarly, the discharge current i e flowing from the conductor 12b to the ground can be measured.
一方、第２図ロに示すように高圧電源１３と帯
電コロナ放電器５（他の放電器についても同じ）
の間に電流計１４を挿入することによつて、コロ
ナ放電器５から流れる放電電流itを測定すること
ができる（放電電流itとieの間には、it＝ie＋icが
成立する。尚、icは金属ケースを介して流れる電
流である）。 On the other hand, as shown in FIG.
By inserting the ammeter 14 between them, it is possible to measure the discharge current i t flowing from the corona discharger 5 (between the discharge currents i t and i e , it = i e + i c (where i c is the current flowing through the metal case).
以上の測定結果に基き、複写機の機種に応じて
放電電流itあるいはieを所定の範囲の値に調整し、
それによつてコロナ放電器８等の汚れ、コロナワ
イヤの変質、温湿度の変化、感光体ドラム３に対
する位置の変化等から生じる放電電流の変動を補
正し、該変動に基くコピー品質の低下や感光体ド
ラム３の近傍で発生する紙詰りを防止している。 Based on the above measurement results, adjust the discharge current i t or i e to a value within a predetermined range depending on the model of the copying machine,
This corrects fluctuations in discharge current caused by dirt on the corona discharger 8, etc., deterioration of the corona wire, changes in temperature and humidity, changes in position relative to the photosensitive drum 3, etc., and reduces copy quality and photosensitive This prevents paper jams occurring near the body drum 3.
しかし、従来の放電電流の測定操作によれば、
治具１２を使用するものにあつては、感光体ドラ
ム３を抜いたり、治具１２を取り付けたりするた
め、その手数が煩らわしく、また、高圧回路に電
流計を挿入するものにあつては、危険であり、か
つ、計器を破損する恐れがある。 However, according to the conventional discharge current measurement operation,
In cases where the jig 12 is used, the process of removing the photoreceptor drum 3 and attaching the jig 12 is troublesome, and in cases where an ammeter is inserted into the high voltage circuit. This is dangerous and may damage the instrument.
(3) 発明の目的および構成
本発明は上記に鑑みてなされたものであり、コ
ロナ放電器の放電時に感光体を介してアースに流
れる電流を容易かつ安全に測定できるようにする
ため、感光体をアースから絶縁してアース間に測
定計器を挿入できるようにし、常時はアース部材
で感光体をアースするようにした電子写真複写
機、および前記測定計器で感光体層を介してアー
スに流れる放電電流を測定するコロナ放電電流測
定方式を提供するものである。(3) Object and structure of the invention The present invention has been made in view of the above-mentioned problems, and provides a method for easily and safely measuring the current flowing through the photoreceptor to the ground during discharge of a corona discharger. An electrophotographic copying machine in which a measuring instrument is inserted between the grounds by insulating it from the ground, and the photoreceptor is always grounded with a grounding member, and an electric discharge flowing from the measuring instrument to the ground via the photoreceptor layer. A corona discharge current measurement method for measuring current is provided.
(4) 実施例
以下本発明による電子写真複写機およびそのコ
ロナ放電電流測定方式を詳細に説明する。(4) Examples The electrophotographic copying machine and its corona discharge current measuring method according to the present invention will be explained in detail below.
第３図イ，ロ，ハは本発明の電子写真複写機の
一実施例を示し、感光体ドラム３は感光体層３ａ
と、導電性支持体３ｂ，３ｃと、導電性支持体３
ｂ，３ｃを絶縁する絶縁体１５（例えば、セラミ
ツク）と、導電性支持体３ｂ，３ｃを短絡するシ
ヨートバー１８より構成されている。導電性支持
体３ｂはフツクピン１６を有し、導電性支持体３
ｃは固定用ねじ１７を有する。その他の構成は第
１図の構成と共通するので重複する説明は省略す
る。 3A, 3B, and 3C show an embodiment of the electrophotographic copying machine of the present invention, in which the photoreceptor drum 3 has a photoreceptor layer 3a.
, conductive supports 3b and 3c, and conductive support 3
It consists of an insulator 15 (for example, ceramic) that insulates conductive supports 3b and 3c, and a short bar 18 that short-circuits conductive supports 3b and 3c. The conductive support 3b has a hook pin 16, and the conductive support 3b has a hook pin 16.
c has a fixing screw 17. Other configurations are the same as those shown in FIG. 1, so redundant explanation will be omitted.
以上の構成において、シヨートバー１８をフツ
クピン１６と固定用ねじ１７の間に挾んで固定用
ねじ１７を締め付けると、シヨートバー１８が導
電性支持体３ｂ，３ｃを電気的に接続し、それに
よつて導電性支持体３ｂを導電性支持体３ｃ、軸
２、軸受支持板１等を介してアースすることがで
きる。従つて、コピー操作を開始すると、各コロ
ナ放電器５，８，９，１０の放電に応じて感光体
ドラム３を介して所定のアース電流を流すことが
できる。 In the above configuration, when the shoot bar 18 is sandwiched between the hook pin 16 and the fixing screw 17 and the fixing screw 17 is tightened, the shoot bar 18 electrically connects the conductive supports 3b and 3c, thereby making the conductive The support 3b can be grounded via the conductive support 3c, the shaft 2, the bearing support plate 1, and the like. Therefore, when a copying operation is started, a predetermined ground current can be caused to flow through the photosensitive drum 3 in accordance with the discharge of each corona discharger 5, 8, 9, and 10.
第４図イ，ロは本発明の電子写真複写機のコロ
ナ放電電流測定方式の一実施例を示し、シヨート
バー１８を外して感光体ドラム３の導電性支持体
３ｂ，３ｃを絶縁体１５で絶縁し、この絶縁によ
つてアースから切り離された導電性支持体３ｂと
アースされているフレーム２０の間に電流計１４
を挿入する。電流計１４のリード線（感光体ドラ
ム３側）の一端には導電性支持体３ｂと接続され
る集電器２１が設けられ、他のリード線（アース
側）の一端にはフレーム２０と接続されるクリツ
プ導体２２が設けられている。集電器２１は、第
４図ロに示すように、軸受支持板１を挾持して支
持される絶縁性クリツプ２１ａと、電流計１４に
接続されるリード線に接続された弾性接触子（例
えば、燐青銅）２１ｂを有し、絶縁性クリツプ２
１ａで軸受支持体１を挾持すると弾性接触子２１
ｂが感光体ドラム３の導電性支持体３ｂと接触す
る。 4A and 4B show an embodiment of the corona discharge current measuring method of the electrophotographic copying machine of the present invention, in which the shot bar 18 is removed and the conductive supports 3b and 3c of the photosensitive drum 3 are insulated with an insulator 15. An ammeter 14 is connected between the conductive support 3b, which is separated from the ground by this insulation, and the frame 20, which is grounded.
Insert. A current collector 21 is provided at one end of the lead wire (on the photosensitive drum 3 side) of the ammeter 14 and connected to the conductive support 3b, and a current collector 21 is connected to the other end of the lead wire (on the ground side) to the frame 20. A clip conductor 22 is provided. As shown in FIG. 4B, the current collector 21 includes an insulating clip 21a that is supported by holding the bearing support plate 1, and an elastic contactor (for example, phosphor bronze) 21b, and an insulating clip 2
When the bearing support 1 is held between 1a and 1a, the elastic contactor 21
b contacts the conductive support 3b of the photoreceptor drum 3.
以上の測定モードにおいて、高圧電源１３のボ
リユーム１３ａを調整したうえオンすると、帯電
コロナ放電器５が放電して導電性支持体３ｂ、集
電器２１の接触子２１ｂ、電流計１４、クリツプ
導体２２、およびフレーム２０を介して放電電流
が流れ、これを測定することができる。他のコロ
ナ放電器８，９，１０についても同じように測定
することができる。これらの測定結果に基いて保
守管理に必要な調整を行う。 In the above measurement mode, when the volume 13a of the high voltage power source 13 is adjusted and turned on, the charging corona discharger 5 discharges the conductive support 3b, the contact 21b of the current collector 21, the ammeter 14, the clip conductor 22, A discharge current flows through the frame 20 and can be measured. The other corona dischargers 8, 9, and 10 can be similarly measured. Necessary adjustments for maintenance management will be made based on these measurement results.
(5) 発明の効果
以上説明した通り、本発明による電子写真複写
機およびそのコロナ放電電流測定方式によれば、
感光体をアースから絶縁してアース間に測定計器
を挿入できるようにし、常時はアース部材で感光
体をアースするようにしたため、コロナ放電器の
感光体を介してアースに流れる放電電流を容易か
つ安全に測定することができる。(5) Effects of the invention As explained above, according to the electrophotographic copying machine and its corona discharge current measurement method according to the present invention,
The photoconductor is insulated from the ground so that a measuring instrument can be inserted between the grounds, and the photoconductor is always grounded with a grounding member, making it easy to control the discharge current flowing to the ground via the photoconductor of the corona discharger. Can be measured safely.
第１図イ，ロは従来の電子写真複写機を示し、
イは一部破断説明図、ロは感光体ドラムの断面
図。第２図イ，ロは従来のコロナ放電電流測定方
式を示す説明図。第３図イ，ロ，ハは本発明の電
子写真複写機の一実施例を示し、イは全体を示す
一部破断説明図、ロは感光体ドラムを示す断面
図、ハは感光体ドラムをアースする手段を示す説
明図。第４図イ，ロは本発明のコロナ放電電流測
定方式を示し、イは全体説明図、ロは集電器の斜
視図。
符号の説明、１…軸受支持板、２…感光体ドラ
ム軸、３…感光体ドラム、４…除電ランプ、５…
帯電コロナ放電器、６…露光スリツト、７…現像
機、８…転写コロナ放電器、９…分離コロナ放電
器、１０…除電コロナ放電器、１１…清掃器、１
２…治具、１３…高圧電源、１４…電流計、１５
…感光体ドラム絶縁体、１８…シヨートバー、２
０…フレーム、２１…集電器。
Figure 1 A and B show a conventional electrophotographic copying machine.
A is a partially broken explanatory diagram, and B is a cross-sectional view of the photoreceptor drum. Figures 2A and 2B are explanatory diagrams showing a conventional corona discharge current measurement method. 3A, 3B, and 3C show an embodiment of the electrophotographic copying machine of the present invention, A is a partially cutaway explanatory view showing the whole, B is a sectional view showing the photoreceptor drum, and C is a sectional view showing the photoreceptor drum. An explanatory diagram showing means for earthing. 4A and 4B show the corona discharge current measurement method of the present invention, A is an overall explanatory view, and B is a perspective view of a current collector. Explanation of symbols: 1... Bearing support plate, 2... Photoconductor drum shaft, 3... Photoconductor drum, 4... Static elimination lamp, 5...
Charging corona discharger, 6... Exposure slit, 7... Developing machine, 8... Transfer corona discharger, 9... Separation corona discharger, 10... Static elimination corona discharger, 11... Cleaner, 1
2...Jig, 13...High voltage power supply, 14...Ammeter, 15
...Photoreceptor drum insulator, 18...Shot bar, 2
0... Frame, 21... Current collector.
Claims (1)
と、該感光体層を支持する導電性支持体より成る
感光手段を備えた電子写真複写機において、 前記導電性支持体をアースから絶縁する絶縁手
段と、 該絶縁手段を橋絡して前記導電性支持体をアー
スするアース部材を備え、コピー操作においては
該アース部材によつて前記導電性支持体をアース
し、コロナ放電器の放電電流測定操作において
は、該アース部材を取り外して前記導電性支持体
をアースから切り離すことを特徴とする電子写真
複写機。 ２ 感光体層を支持する導電性支持体をアースか
ら絶縁する絶縁手段と、コピー操作時該絶縁手段
を橋絡して前記導電性支持体をアースするアース
部材を備えた電子写真複写機において、 前記アース部材を取り外して前記導電性支持体
をアースから切り離し、前記導電性支持体とアー
ス間に電流測定計器を挿入し、該電流測定計器の
挿入状態においてコロナ放電器を作動させること
を特徴とする電子写真複写機のコロナ放電電流測
定方式。[Scope of Claims] 1. An electrophotographic copying machine equipped with a photosensitive means comprising a photoreceptor layer that forms an electrostatic latent image according to a document, and a conductive support that supports the photoreceptor layer, comprising: The apparatus includes an insulating means for insulating the support from the ground, and a grounding member for bridging the insulating means and grounding the conductive support, and in a copying operation, the conductive support is grounded by the grounding member. . An electrophotographic copying machine, characterized in that in an operation for measuring a discharge current of a corona discharger, the ground member is removed to disconnect the conductive support from the ground. 2. An electrophotographic copying machine comprising an insulating means for insulating a conductive support supporting a photoreceptor layer from the ground, and a grounding member for bridging the insulating means and grounding the conductive support during a copying operation, The conductive support is separated from the ground by removing the ground member, a current measuring instrument is inserted between the conductive support and the ground, and the corona discharger is operated in the inserted state of the current measuring instrument. Corona discharge current measurement method for electrophotographic copying machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58025277A JPS59151169A (en) | 1983-02-17 | 1983-02-17 | Electrophotographic copying machine and its corona discharge current measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58025277A JPS59151169A (en) | 1983-02-17 | 1983-02-17 | Electrophotographic copying machine and its corona discharge current measuring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59151169A JPS59151169A (en) | 1984-08-29 |
| JPH0221586B2 true JPH0221586B2 (en) | 1990-05-15 |
Family
ID=12161523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58025277A Granted JPS59151169A (en) | 1983-02-17 | 1983-02-17 | Electrophotographic copying machine and its corona discharge current measuring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59151169A (en) |
-
1983
- 1983-02-17 JP JP58025277A patent/JPS59151169A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59151169A (en) | 1984-08-29 |
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