JPH01159672A - Scorotron electrostatic charger - Google Patents
Scorotron electrostatic chargerInfo
- Publication number
- JPH01159672A JPH01159672A JP31822987A JP31822987A JPH01159672A JP H01159672 A JPH01159672 A JP H01159672A JP 31822987 A JP31822987 A JP 31822987A JP 31822987 A JP31822987 A JP 31822987A JP H01159672 A JPH01159672 A JP H01159672A
- Authority
- JP
- Japan
- Prior art keywords
- shield case
- wire
- grid
- scorotron
- metal
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- -1 for example Inorganic materials 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 101150036577 fl11 gene Proteins 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （技術分野） 本発明は、スコロトロン帯電装置に関する。[Detailed description of the invention] (Technical field) The present invention relates to a scorotron charging device.
（従来技術）
従来、チャージワイヤ、シールドケースおよびグリッド
からなるスコロトロン１Ｆ電装置として。(Prior Art) Conventionally, as a scorotron 1F electric device consisting of a charge wire, a shield case, and a grid.
上記シールドケースを金属（導体）で形成したものと、
プラスチック（絶縁体）で形成したものとが知られてい
る。The above shield case is made of metal (conductor),
It is known to be made of plastic (insulator).
シールドケースを金属（導体）で形成したスコロトロン
帯電装置は、変形に対して充分な強度を有しているため
、たとえばコピーサイズがＡＯ版（８４１ｍｍ Ｘ １
０００ｍｍ）のような大型複写機の１！−電装阻として
使用しても変形による取付精度を高く維持することがで
き、またオゾンの発生量も少ない。The Scorotron charging device, whose shield case is made of metal (conductor), has sufficient strength against deformation.
1 of large copy machines such as 000mm)! - Even when used as an electrical equipment barrier, the installation accuracy due to deformation can be maintained at a high level, and the amount of ozone generated is small.
しかしながら、このスコロ］・ロン帯電装置は、感光体
の静電容量変化（クリーニングブレード等による感光層
の削れなど）に対するＴＩ電電位の変化率が非常に大き
くなり、また、グリッド用の定電圧素子のワット数も高
くする必要があった。However, with this Scoro/Ron charging device, the rate of change in the TI electric potential due to changes in the capacitance of the photoreceptor (such as abrasion of the photosensitive layer by a cleaning blade, etc.) is very large, and the constant voltage element for the grid is The wattage also needed to be higher.
一方、シールドケースをプラスチック（絶縁体）で形成
したスコロトロン１Ｆ電装置は、グリッドおよび感光体
力向に流れるチャージャワイヤからの放電電流が上記前
者に比べ著しく多く、また、感光体の帯電電位の制御性
能が非常に良く、感光層の静電容量変化（感光体表面の
摩耗による）が生じても帯電電位が非常に安定している
。たとえば、リコー製Ｎ ３ Ｈ（プリンター）の静電
容量変化に対する帯電電位の変化率は、−０，ＩＶｏｌ
ｔ／ＰＦ程度である。しかしながら、このスコロトロン
帯電装ロは、前述のような大型複写機の帯電装置どして
使用した場合、変形により取付精度が悪くなる欠点を有
している。On the other hand, in the Scorotron 1F electric device whose shield case is made of plastic (insulator), the discharge current from the charger wire flowing in the direction of the grid and photoconductor force is significantly larger than that of the former, and the control performance of the charged potential of the photoconductor is The charging potential is very stable even if the capacitance of the photosensitive layer changes (due to abrasion of the photoreceptor surface). For example, the rate of change in charging potential with respect to the change in capacitance of Ricoh's N3H (printer) is -0,IVol
It is about t/PF. However, when this scorotron charging device is used as a charging device for a large-sized copying machine as described above, it has the disadvantage that mounting accuracy deteriorates due to deformation.
（目 的）
本発明の目的は、オゾン発生量および変形が少なく、か
つ帯電電位制御性能の非常に優れたスコロトロン帯電装
置を提供することにある。(Objective) An object of the present invention is to provide a scorotron charging device that generates less ozone and generates less deformation, and has excellent charging potential control performance.
（構 成）
本発明によるスコロトロン帯電装置は、チャージワイヤ
、シールドケースおよびグリッドからなり、上記シール
ドケースの基本を金属で形成するとともに、このシール
ドケースの内周面の一部乃至全域を高抵抗部材で被覆し
たことを特徴どする。(Structure) The scorotron charging device according to the present invention consists of a charge wire, a shield case, and a grid, and the basic part of the shield case is made of metal, and a part or the entire inner peripheral surface of the shield case is made of a high-resistance material. It is characterized by being coated with.
以下、本発明の一実施例を図に基いて詳細に説明する。Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
本発明によるスコロトロン帯電装置は、たとえば図に示
すように、チャージワイヤ１、シールドケース２および
グリッド３とで構成されている。The scorotron charging device according to the present invention includes, for example, a charge wire 1, a shield case 2, and a grid 3, as shown in the figure.
チャージワイヤ１は、たとえば線径が６０〜８０μ墓の
タングステンワイヤで形成されており、感光体４の感光
Ｗ４Ａの表面４ａおよびシールドケース２の内周面２ａ
との雛間距離約１０ｍｍとなるように張架されている。The charge wire 1 is formed of, for example, a tungsten wire with a wire diameter of 60 to 80 μm, and is connected to the surface 4a of the photoconductor W4A of the photoconductor 4 and the inner circumferential surface 2a of the shield case 2.
The chicks are stretched so that the distance between the chicks and the chicks is approximately 10 mm.
シールドケース２は、その基体２Ａが、たとえばアルミ
ニウムなどの金属で形成されており、図示の例では開口
幅２０ＩＩＩＩ１１．厚さ２＋ｆｌ１１．長さ９４０ｎ
＋ｍのシールドケースを示している。このシールドケー
ス２の内周面２ａの−・部乃至全域は、高抵抗部材２Ｂ
によって被覆されている。The shield case 2 has a base body 2A made of metal such as aluminum, and has an opening width of 20III11. Thickness 2+fl11. Length 940n
+m shield case is shown. The - part to the entire area of the inner peripheral surface 2a of this shield case 2 is a high-resistance member 2B.
covered by.
図示のシールドケース２の高抵抗部材２Ｂどしては、た
とえば厚さ５０〜１００μ通のポリエステルフィルムが
、シールドケース２の内周面２ａの５０％以上に′Ｉｔ
ＬｒｊＩされる。また、高抵抗部材２Ｂは、体積固有抵
抗が１０１６ΩｃＩｍ以上であるものが好ましい。As the high resistance member 2B of the illustrated shield case 2, for example, a polyester film having a thickness of 50 to 100 μm is applied to more than 50% of the inner circumferential surface 2a of the shield case 2.
It will be LrjI. Further, the high resistance member 2B preferably has a volume resistivity of 10 16 ΩcIm or more.
グリッド３は、チャージワイヤ１およびシールドケース
２を上述のような仕様とした場合、たどえば、グリッド
ワイヤとしては、線径が０．１〜０．２組ｌのステンレ
イワイヤが適しており、各グリッドワイヤの間隔は１．
５〜２．０１１１１１とし、また、グリッドワイヤと感
光体４の感光Ｍ４Ａの表４８との離間距離は１．５〜２
．５ｍｍとした場合に最適どなる。さらに、グリッド用
定電圧素子３ａとしては０．５〜１．ＯＷのものが好適
である。For the grid 3, if the charge wire 1 and the shield case 2 have the specifications described above, a stainless steel wire with a wire diameter of 0.1 to 0.2 pairs is suitable as the grid wire. , the spacing between each grid wire is 1.
5 to 2.011111, and the distance between the grid wire and the table 48 of photoconductor M4A of photoconductor 4 is 1.5 to 2.
．． It is best to use 5mm. Furthermore, as the grid constant voltage element 3a, 0.5 to 1. OW is preferred.
一方、感光体４の感光Ｊ５４Ａとしては、その静電容量
が、暗中において１通常１００〜２００ＰＦ／ ｃ＋ａ
”程度となるものを使用することが望ましい、また、感
光体４の導？１層４Ｂとしては、アルミニウム合金等が
使用される。On the other hand, as for the photoconductor J54A of the photoconductor 4, its capacitance is usually 100 to 200PF/c+a in the dark.
It is preferable to use a material that is of a certain degree.Also, as the conductive layer 4B of the photoreceptor 4, an aluminum alloy or the like is used.
ところで、前に述べたように、シールドケース２の剛性
を高めるためだけの目的で、シールドケース２を金属で
形成した場合には、たとえばパワーバックの出力電流を
１〜１ 、５ｎ＋ Ａの定電流とし、感光体４の移動速
度を１００ｍｍ／ｓｅｅとした場合、感光体４の静電容
量変化に対する帯電電位の変化率が−１，５Ｖ／ＰＦと
非常に大きくなって、帯電電位の制御性能が劣化してし
まう。なお、スコロトロン帯電装置は１周知のように１
本来誘電体に固有な帯電特性には無関係に、その最大表
面電位が予め設定された値になるように調節することが
可能で、帯電量をより良くコントロールすることができ
る特徴を有している。By the way, as mentioned before, if the shield case 2 is made of metal for the sole purpose of increasing the rigidity of the shield case 2, for example, the output current of the power back can be set to 1 to 1, or a constant current of 5n+ A. If the moving speed of the photoreceptor 4 is 100 mm/see, the rate of change in the charging potential with respect to the change in the capacitance of the photoreceptor 4 is very large, -1.5V/PF, and the control performance of the charging potential is poor. It will deteriorate. Incidentally, the scorotron charging device is 1, as is well known.
It has the characteristic that the maximum surface potential can be adjusted to a preset value regardless of the charging characteristics inherent to the dielectric material, allowing better control of the amount of charging. .
そこで、シールドケース２の基体２Ａをアルミニウムで
形成するとともに、このシールドケース２の内周面２ａ
の約６０％の部分を、厚さ１００μ、体積固有抵抗が１
０１′ΩｃＩ１１のポリエステルフィルムで被覆したと
ころ、上述の帯電電位の変化率が約−０，５Ｖ／ＰＦと
著しく改菅され、その帯電電位制御性能が著しく向上さ
れた。また、グリッド用定電圧素子３ａのワット数も従
来のように高くする必要がなくＯ，ＳＷで充分であった
。Therefore, the base 2A of the shield case 2 is made of aluminum, and the inner peripheral surface 2a of the shield case 2 is made of aluminum.
Approximately 60% of the
When coated with a polyester film of 01'ΩcI11, the rate of change in charging potential was significantly improved to about -0.5 V/PF, and the charging potential control performance was significantly improved. Further, the wattage of the grid voltage constant element 3a did not need to be increased as in the conventional case, and O and SW were sufficient.
（効 果）
上述のように、本発明によるスコロトロン帯電装置は、
オゾンの発生量や自重によるたわみ等の変形が少なく、
帯電電位制御性能が著しく向上される。(Effects) As described above, the scorotron charging device according to the present invention has the following effects:
There is less deformation such as deflection due to the amount of ozone generated or its own weight.
Charge potential control performance is significantly improved.
図は本発明の一実胞駐の概略図である。
１・・・・チャージワイヤ、２・・・・シールドケース
、２ａ・・・・内周面、２Ａ・・・・基体、２Ｂ・・・
・高抵抗部材、３・・・・グリッド、 ３ａ・・・・グ
リッド用定電圧素子。
図面の浄貴
手続祁ｌ正書（自発）The figure is a schematic diagram of one embodiment of the present invention. 1... Charge wire, 2... Shield case, 2a... Inner peripheral surface, 2A... Base, 2B...
- High resistance member, 3...grid, 3a... constant voltage element for grid. Purification procedure for drawings (spontaneous)
Claims (1)
スコロトロン帯電装置であって、上記シールドケースの
基体を金属で形成するとともに、このシールドケースの
内周面の一部乃至全域を高抵抗部材で被覆したことを特
徴とするスコロトロン帯電装置。A scorotron charging device consisting of a charge wire, a shield case, and a grid, characterized in that the base of the shield case is made of metal, and a part or the entire inner peripheral surface of the shield case is covered with a high-resistance material. Scorotron charging device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31822987A JPH01159672A (en) | 1987-12-16 | 1987-12-16 | Scorotron electrostatic charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31822987A JPH01159672A (en) | 1987-12-16 | 1987-12-16 | Scorotron electrostatic charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01159672A true JPH01159672A (en) | 1989-06-22 |
Family
ID=18096865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31822987A Pending JPH01159672A (en) | 1987-12-16 | 1987-12-16 | Scorotron electrostatic charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01159672A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009244536A (en) * | 2008-03-31 | 2009-10-22 | Toray Eng Co Ltd | Charging device and image forming device |
-
1987
- 1987-12-16 JP JP31822987A patent/JPH01159672A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009244536A (en) * | 2008-03-31 | 2009-10-22 | Toray Eng Co Ltd | Charging device and image forming device |
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