JPH04306674A - Static eliminator device - Google Patents
Static eliminator deviceInfo
- Publication number
- JPH04306674A JPH04306674A JP9827191A JP9827191A JPH04306674A JP H04306674 A JPH04306674 A JP H04306674A JP 9827191 A JP9827191 A JP 9827191A JP 9827191 A JP9827191 A JP 9827191A JP H04306674 A JPH04306674 A JP H04306674A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- discharge wire
- amplitude
- gutter
- static eliminator
- 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
- 230000003068 static effect Effects 0.000 title claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は除電装置、特に、複写
機やプリンタなどの画像形成装置に好適な小型除電装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static eliminator, and more particularly to a compact static eliminator suitable for image forming apparatuses such as copying machines and printers.
【０００２】0002
【従来の技術】一般にこの種の除電装置は、導電性の樋
状ハウジング内に、放電ワイヤを直線状に張架してなり
、該樋状ハウジングの開口近傍を通過する帯電体を、コ
ロナ放電により除電できるように構成されている。例え
ば、複写機やプリンタなどの画像形成装置においては、
感光体ドラムのトナー像を転写した記録紙や感光体を除
電するため、放電ワイヤの周囲を、断面コ字形の導電性
樋部材の内面に高抵抗部材を付設した小型除電装置が装
備されている。[Prior Art] This type of static eliminator generally has a discharge wire stretched in a straight line within a conductive gutter-like housing, and charges a charged body passing near the opening of the gutter-like housing with a corona discharge. The structure is such that static electricity can be removed by For example, in image forming devices such as copying machines and printers,
In order to eliminate static electricity from the recording paper and photoconductor onto which the toner image on the photoconductor drum has been transferred, a small static neutralization device is equipped with a high-resistance member attached to the inner surface of a conductive gutter member with a U-shaped cross section that surrounds the discharge wire. .
【０００３】0003
【発明が解決しようとする課題】近年、画像形成装置の
小型化が進展し、これら装置に搭載される除電装置も小
型化の傾向にある。しかしながら、こうした除電装置の
小型化に伴い、放電ワイヤと樋状ハウジングの間隔が狭
まるにつれ、ワイヤの振動による落雷や、除電効果の減
少が深刻な問題となってきている。これは主として、放
電ワイヤの振動発生が不可避であることによっている。In recent years, image forming apparatuses have become smaller, and the static eliminators mounted on these apparatuses have also tended to be smaller. However, with the miniaturization of such static eliminators, the distance between the discharge wire and the gutter-like housing has become narrower, and as a result, lightning strikes due to vibration of the wire and a decrease in the static eliminator effect have become serious problems. This is mainly due to the unavoidable occurrence of vibrations in the discharge wire.
【０００４】即ち、放電ワイヤは、直線的な架設状態を
実現するため所定の張力で牽引されているが、除電のた
め印加されるＡＣ電圧により、横方向への電磁力を受け
ることとなる。この時、放電ワイヤは、樋状ハウジング
の中央部に腹を持つ弦振動を開始するが、該ワイヤの固
有振動数がＡＣ電圧の周波数と同程度であれば、弦振動
は大きく成長する。ところが、ワイヤ長、ワイヤ径、張
力、印加電圧周波数などの基本定数は、設計上の制約か
ら極めて非常に狭い範囲でしか選択することができない
。このため、特に、放電ワイヤと樋状ハウジングの間隔
が５ｍｍ以下となるような小型除電装置では、共振的な
振動が発生しやすい。そして、弦振動の振幅（以下「振
幅」は、すべて振動全幅をいう）が、３ｍｍ程度に達す
ると除電効果が急減して落雷も起きやすくなることが、
本願発明者の研究によって確認されている。That is, although the discharge wire is pulled with a predetermined tension in order to achieve a linear installation state, it is subjected to a lateral electromagnetic force due to the AC voltage applied to eliminate static electricity. At this time, the discharge wire starts string vibration having an antinode in the center of the trough-like housing, but if the natural frequency of the wire is about the same as the frequency of the AC voltage, the string vibration grows significantly. However, basic constants such as wire length, wire diameter, tension, and applied voltage frequency can only be selected within a very narrow range due to design constraints. Therefore, especially in a small static eliminator in which the distance between the discharge wire and the gutter-like housing is 5 mm or less, resonant vibrations are likely to occur. When the amplitude of string vibration (hereinafter "amplitude" refers to the full width of vibration) reaches about 3 mm, the static elimination effect decreases rapidly and lightning strikes become more likely to occur.
This has been confirmed through research by the inventor of the present application.
【０００５】この発明は上記の点に鑑み、ワイヤの振動
による落雷や、除電効果の減少を未然に回避できる除電
装置を提供することを目的としている。SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a static eliminator that can prevent lightning strikes caused by wire vibrations and a reduction in the static neutralizing effect.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めこの発明は、導電性の樋状ハウジング内に、放電ワイ
ヤを直線状に張架してなる除電装置において、前記ハウ
ジングの内側適所に、前記放電ワイヤの振幅を規制する
手段を設け、落雷の発生を未然に防止できるようにした
ものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a static eliminator in which a discharge wire is stretched in a straight line within a conductive gutter-like housing. , means for regulating the amplitude of the discharge wire is provided to prevent the occurrence of lightning strikes.
【０００７】また、前記規制手段は、前記放電ワイヤに
近接する切り欠き部を有する非導電性部材からなるもの
とし、簡潔な構成で放電ワイヤの振幅を規制できるよう
にしたものである。[0007] Furthermore, the regulating means is made of a non-conductive member having a notch close to the discharge wire, so that the amplitude of the discharge wire can be regulated with a simple structure.
【０００８】また、一辺の長さ１０ｍｍ以内で断面コ字
形の導電性樋状ハウジングの中心部に、放電ワイヤを直
線状に張架してなる除電装置において、前記樋状ハウジ
ングの内側中央部に、前記放電ワイヤの振幅を２．５ｍ
ｍ以下に規制する切り欠き部を有する非導電性板部材を
設け、特に、小型の除電装置における落雷防止を実現で
きるようにしたものである。[0008] Furthermore, in a static eliminator in which a discharge wire is strung linearly in the center of a conductive gutter-like housing having a U-shaped cross section and a side length of 10 mm or less, a discharge wire is strung in a straight line at the center of the inner side of the gutter-like housing. , the amplitude of the discharge wire is 2.5 m
By providing a non-conductive plate member having a cutout portion that regulates the height to be less than m, it is possible to particularly prevent lightning strikes in a small static eliminator.
【０００９】また、前記非導電性板部材を弾性部材から
なり、かつ弾性によって前記ハウジング内に嵌装できる
ように構成し、接着に不向きな材料でも振動規制部材と
して使用し、かつ組み立て工程を簡素化できるようにし
たものである。[0009] Furthermore, the non-conductive plate member is made of an elastic member and is constructed so that it can be fitted into the housing by elasticity, so that even a material unsuitable for bonding can be used as a vibration regulating member, and the assembly process is simplified. It was made so that it could be digitized.
【００１０】0010
【実施例】以下、この発明を添付の図面に示す一実施例
に基づいて説明する。図１は本願除電装置の第１の構成
を示す斜視図、図２は第２の構成を示す斜視図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on an embodiment shown in the accompanying drawings. FIG. 1 is a perspective view showing a first configuration of the static eliminator of the present application, and FIG. 2 is a perspective view showing a second configuration.
【００１１】図において、１は導電性の樋状ハウジング
で、該ハウジング１は、一辺の長さが１０ｍｍ以内で断
面コ字形の樋状に成形した金属プレートからなり、該ハ
ウジング１の中心部には、放電ワイヤ２が直線状に配設
されている。従って、該樋状ハウジング１と放電ワイヤ
２の間隔は、最短位置（放電ワイヤ２からハウジング１
の側面または底面に下ろした垂線の長さ）で５ｍｍ以下
となっている。尚、該樋状ハウジング１の断面形状はコ
字形に限らず、例えば、半円弧状などであってもよい。In the figure, reference numeral 1 denotes a conductive gutter-shaped housing, and the housing 1 is made of a metal plate formed into a gutter-like shape with a side length of 10 mm or less and a U-shaped cross section. In this case, the discharge wire 2 is arranged in a straight line. Therefore, the distance between the trough-like housing 1 and the discharge wire 2 is at the shortest position (from the discharge wire 2 to the housing 1
(The length of the perpendicular line drawn down to the side or bottom surface) is 5 mm or less. Note that the cross-sectional shape of the gutter-like housing 1 is not limited to the U-shape, but may be, for example, a semicircular arc shape.
【００１２】前記放電ワイヤ２は、両端を所定の張力で
牽引しつつ通電部（図示せず）間に直線状に架設されて
おり、数十Ｈｚ近傍に固有振動数ω０ を有している。
また、該放電ワイヤ２は、直径が約５０μｍであり、所
定のＡＣ電圧（Ｖ＝１０ｋｖ程度，ｆ＝数百Ｈｚ）が通
電可能に構成されている。The discharge wire 2 is installed in a straight line between current-carrying parts (not shown) while pulling both ends with a predetermined tension, and has a natural frequency ω0 in the vicinity of several tens of Hz. Further, the discharge wire 2 has a diameter of about 50 μm, and is configured to be able to pass a predetermined AC voltage (V=about 10 kV, f=several hundred Hz).
【００１３】３は高抵抗部材で、該高抵抗部材３は、前
記樋状ハウジング１の内面全体を覆うように設けられ、
放電ワイヤ２から樋状ハウジング１への流し込み電流を
適宜抑制できるように構成されている。本実施例の高抵
抗部材３は、加工・成形の容易な変性ＰＰＥ（樹脂）を
使用している。Reference numeral 3 denotes a high resistance member, and the high resistance member 3 is provided so as to cover the entire inner surface of the gutter-shaped housing 1.
It is configured such that the current flowing from the discharge wire 2 to the trough-like housing 1 can be appropriately suppressed. The high resistance member 3 of this embodiment uses modified PPE (resin) that is easy to process and mold.
【００１４】該高抵抗部材３は、樋状ハウジング１と同
形な断面コ字形の樋状に成形され、かつ弾性によってわ
ずかに変形し、該ハウジング１の内面にぴったり嵌装す
るようになっている。但し、該高抵抗部材３を適当な接
着剤で固定したり、樋状ハウジング１のエッジ部（上縁
ないし端縁）に係止するように構成してもよいことはも
ちろんである。例えば、樋状ハウジング１の上縁部を外
側に向けて耳部を形成し、該耳部を高抵抗部材３のエッ
ジ部で係止してもよい。The high-resistance member 3 is formed into a gutter shape with a U-shaped cross section that is the same as the gutter-shaped housing 1, and is slightly deformed due to elasticity so as to fit snugly into the inner surface of the housing 1. . However, it goes without saying that the high-resistance member 3 may be fixed with a suitable adhesive or configured to be latched to the edge portion (upper edge or end edge) of the trough-like housing 1. For example, the upper edge of the trough-like housing 1 may be turned outward to form an ear, and the ear may be locked with the edge of the high-resistance member 3.
【００１５】４は振幅規制部材で、該振幅規制部材４は
樋状ハウジング１と略同幅の非導電性板部材からなり、
前記樋状ハウジング１の中央部に嵌装されている。また
、該振幅規制部材４には、上縁中央から板面の中心に向
けて、幅＝２．５ｍｍ以下のＵ字形切り欠きＫが設けら
れ、かつ該切り欠きＫの円弧状底部近傍で、底部から２
．５ｍｍ以内の位置を前記放電ワイヤ２が挿通するよう
に構成されている。従って、放電ワイヤ２は両側面と下
側が該切り欠きＫに規制され、最大振幅２．５ｍｍ以上
の振動ができないようになっている。Reference numeral 4 denotes an amplitude regulating member, and the amplitude regulating member 4 is made of a non-conductive plate member having approximately the same width as the gutter-like housing 1;
It is fitted into the center of the gutter-like housing 1. Further, the amplitude regulating member 4 is provided with a U-shaped notch K having a width of 2.5 mm or less from the center of the upper edge toward the center of the plate surface, and near the arcuate bottom of the notch K. 2 from the bottom
．． The discharge wire 2 is configured to be inserted within a position within 5 mm. Therefore, both sides and the lower side of the discharge wire 2 are restricted by the notch K, and vibration with a maximum amplitude of 2.5 mm or more is not possible.
【００１６】該振動規制部材（規制手段）４の材質は、
特に耐アース性（＝導電性）と耐トラッキング性（表面
通電性）に優れた物質であることが望ましい。図１の実
施例では、高抵抗部材３と振動規制部材４を一体成形し
ているため、変性ＰＰＥで構成している。また、図２の
実施例では、振動規制部材４のみをシリコン樹脂で構成
しているため、振動規制部材４の取り付けは高抵抗部材
３の弾性変形を利用した嵌入によることになる。これは
、シリコン樹脂用の高性能接着剤が、現状では知られて
いないためである。即ち、高抵抗部材３に溝部Ｍを形成
し、振動規制部材４をそれ自身の弾性変形によって該溝
部Ｍに嵌入することとなる。尚、振動規制部材４の切り
欠きＫは、放電ワイヤ２の近傍を取り囲む丸穴であって
もよい。The material of the vibration regulating member (regulating means) 4 is as follows:
In particular, it is desirable that the material be excellent in earth resistance (=conductivity) and tracking resistance (surface conductivity). In the embodiment shown in FIG. 1, the high-resistance member 3 and the vibration regulating member 4 are integrally molded and are therefore made of modified PPE. Furthermore, in the embodiment shown in FIG. 2, since only the vibration regulating member 4 is made of silicone resin, the vibration regulating member 4 is attached by fitting using the elastic deformation of the high resistance member 3. This is because high-performance adhesives for silicone resin are currently unknown. That is, a groove M is formed in the high resistance member 3, and the vibration regulating member 4 is fitted into the groove M by its own elastic deformation. Note that the cutout K of the vibration regulating member 4 may be a round hole surrounding the vicinity of the discharge wire 2.
【００１７】図２の実施例において、放電ワイヤ２にＡ
Ｃ通電すると、放電ワイヤ２の固有振動数ω０ とＡＣ
周波数ｆが近接した場合、放電ワイヤ２の弦振動の振幅
が増大することがある。この時、放電ワイヤ２の振幅が
所定値（上記実施例では２．５ｍｍ）以上になると、ワ
イヤ２は振動規制部材４の切り欠きＫに当接するため、
樋状ハウジング１に対する距離が所定値（上記実施例で
は、（５．０−２．５）＝２．５ｍｍ）以下となること
はない。ここで、振動規制部材４は非導電性のシリコン
樹脂でできており、しかも、樋状ハウジング１の内面は
、高抵抗で流れ込み電流を抑制できる変性ＰＰＥで覆わ
れているため、トラッキングやアース現象による落雷を
未然に防止することができる。In the embodiment of FIG. 2, the discharge wire 2 is
When C is energized, the natural frequency ω0 of the discharge wire 2 and AC
When the frequencies f are close to each other, the amplitude of string vibration of the discharge wire 2 may increase. At this time, when the amplitude of the discharge wire 2 exceeds a predetermined value (2.5 mm in the above embodiment), the wire 2 comes into contact with the notch K of the vibration regulating member 4.
The distance to the gutter-like housing 1 never becomes less than a predetermined value ((5.0-2.5)=2.5 mm in the above embodiment). Here, the vibration regulating member 4 is made of non-conductive silicone resin, and the inner surface of the gutter-like housing 1 is covered with modified PPE that has high resistance and can suppress flowing current. lightning strikes can be prevented.
【００１８】[0018]
【発明の効果】上記のようにこの発明は、導電性の樋状
ハウジング内に、放電ワイヤを直線状に張架してなる除
電装置において、前記ハウジングの内側適所に、前記放
電ワイヤの振動振幅を所定値以下に規制する手段を設け
たことを特徴としているので、放電ワイヤが樋状ハウジ
ングに近接して落雷するのを未然に防止することができ
る。As described above, the present invention provides a static eliminator in which a discharge wire is stretched linearly in a conductive trough-like housing, in which vibration amplitude of the discharge wire is fixed at a proper place inside the housing. Since the present invention is characterized in that a means is provided for regulating the voltage to a predetermined value or less, it is possible to prevent the discharge wire from being struck by lightning in the vicinity of the gutter-shaped housing.
【００１９】また、前記規制手段は、前記放電ワイヤに
近接する切り欠き部を有する非導電性部材からなるもの
としているので、簡潔な構成で放電ワイヤの振幅を規制
することができる。Furthermore, since the regulating means is made of a non-conductive member having a notch close to the discharge wire, it is possible to regulate the amplitude of the discharge wire with a simple configuration.
【００２０】また、一辺の長さ１０ｍｍ以内で断面コ字
形の導電性樋状ハウジングの中心部に、放電ワイヤを直
線状に張架してなる除電装置において、前記樋状ハウジ
ングの内側中央部に、前記放電ワイヤの振幅を２．５ｍ
ｍ以下に規制する切り欠き部を有する非導電性板部材を
設けたことを特徴としているので、特に、小型の除電装
置において、放電ワイヤが樋状ハウジングに近接して落
雷するのを未然に防止することができる。[0020] Furthermore, in a static eliminator in which a discharge wire is strung linearly in the center of a conductive gutter-like housing having a U-shaped cross section and a side length of 10 mm or less, a discharge wire is strung in a straight line at the center of the inner side of the gutter-like housing. , the amplitude of the discharge wire is 2.5 m
It is characterized by the provision of a non-conductive plate member having a notch that regulates the electrical conductivity to be less than m, so it can prevent the discharge wire from being struck by lightning in the vicinity of the gutter-shaped housing, especially in small static eliminators. can do.
【００２１】また、発明の第３の構成において、非導電
性板部材は弾性部材からなり、かつ弾性によって前記ハ
ウジング内に嵌装されたものとしているので、接着剤に
よらずに非導電性板部材を固定でき、組立工程も簡素化
することができる。Furthermore, in the third aspect of the invention, the non-conductive plate member is made of an elastic member and is elastically fitted into the housing, so that the non-conductive plate member can be attached without using an adhesive. The members can be fixed and the assembly process can be simplified.
【００２２】この結果、小型で、高性能の除電装置を提
供できるという優れた効果を奏するものである。[0022] As a result, it is possible to provide an excellent effect of providing a compact and high-performance static eliminator.
【図１】本願除電装置の第１構成の斜視図である。FIG. 1 is a perspective view of a first configuration of the static eliminator of the present application.
【図２】本願除電装置の第２構成の斜視図である。FIG. 2 is a perspective view of a second configuration of the static eliminator of the present application.
１ 樋状ハウジング ２ 放電ワイヤ ３ 高抵抗部材 ４ 振動規制部材 Ｍ 溝部 Ｋ 切り欠き 1. Gutter-shaped housing 2 Discharge wire 3 High resistance components 4 Vibration regulating member M Groove K Notch
Claims (4)
イヤを直線状に張架してなる除電装置において、前記ハ
ウジングの内側適所に、前記放電ワイヤの振幅を規制す
る手段を設けたことを特徴とする除電装置。1. A static eliminator comprising a discharge wire stretched in a straight line within a conductive trough-like housing, further comprising means for regulating the amplitude of the discharge wire at a suitable location inside the housing. Characteristic static eliminator.
に近接する切り欠き部を有する非導電性部材からなるも
のである請求項１に記載の除電装置。2. The static eliminator according to claim 1, wherein the amplitude regulating means is made of a non-conductive member having a notch close to the discharge wire.
の導電性樋状ハウジングの中心部に、放電ワイヤを直線
状に張架してなる除電装置において、前記樋状ハウジン
グの内側中央部に、前記放電ワイヤの振幅を２．５ｍｍ
以下に規制する切り欠き部を有する非導電性板部材を設
けたことを特徴とする除電装置。3. In a static eliminator comprising a conductive gutter-like housing with a side length of 10 mm or less and a U-shaped cross section, a discharge wire is stretched in a straight line at the center of the conductive gutter-like housing. , the amplitude of the discharge wire is 2.5 mm
A static eliminator comprising a non-conductive plate member having a notch defined as follows.
り、かつ弾性によって前記ハウジング内に嵌装されたも
のである請求項３に記載の除電装置。4. The static eliminator according to claim 3, wherein the non-conductive plate member is made of an elastic member and is elastically fitted into the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9827191A JPH04306674A (en) | 1991-04-03 | 1991-04-03 | Static eliminator device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9827191A JPH04306674A (en) | 1991-04-03 | 1991-04-03 | Static eliminator device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04306674A true JPH04306674A (en) | 1992-10-29 |
Family
ID=14215281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9827191A Pending JPH04306674A (en) | 1991-04-03 | 1991-04-03 | Static eliminator device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04306674A (en) |
-
1991
- 1991-04-03 JP JP9827191A patent/JPH04306674A/en active Pending
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