JP2004253192A - Static charge eliminator, and detachable unit for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a static charge eliminator and a detachable unit for the same, of which the discharging electrode can be easily replaced. <P>SOLUTION: The detachable unit for the static charge eliminator 20 comprises a supporting body 4 in which, a ventilation hole 3 is formed, at least one discharging electrode 1 arranged on the supporting body 4 so as to protrude toward the ventilation hole 3, a high voltage power source 2 supplying power to the discharge electrode 1. A static charge eliminator body 21 comprises a case 6 with a case opening 5, a fan 7 arranged at the case opening 5, and a holding part 8 holding the detachable unit 20 when the detachable unit 20 is mounted on the static charge eliminator body 21. Since it is not necessary for the detachable unit for the static charge eliminator to receive high voltage power from the static charge eliminator body 21, an electric contact point for the high voltage is omitted, a mechanical trouble like improper contact is avoided, and the safety of mounting is improved. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０１２４】
【表２】

【０１２５】
一方、表３は図２７において、ベアリング３７Ａの向きは図のように配置し、ベアリング３７Ｂの向きを変えて発塵量を測定した結果を示す。表３において、ベアリング３７Ｂを、ベアリング３７Ａとの対向面にリテーナ３９を、ファン部２６の表面側に開放部をシールで閉塞した面を、それぞれ向くように配置した例を×、図２７と逆に、ベアリング３７対向面に開放面を、ファン部２６表面側にリテーナ３９とシールを設けた面をそれぞれ配置した例を○と表示している。表３を判りやすくするために、上記と同様に×、○それぞれのベアリング３７Ｂの発塵量の分布を表４に示している。この結果から平均を求めると、×の配置では１６．９５個／分、○の配置では３１．５個／分となり、約５４％に発塵量を低減できた。このことから、図２７に示す配置、すなわちベアリング３７対向面にリテーナ３９が、ファン部２６表面側にシールが位置するように配置する構成が、最も発塵量が少ないことが明らかとなった。なお、これらの実験は本実施の形態の構成における比較試験であって、従来技術との対比試験ではない。例えばベアリング３７の開放面をファン部２６表面側としたり、シールを貼付しない構成においては、さらに発塵量は多くなると予想される。
【０１２６】
【表３】

【０１２７】
【表４】

【０１２８】
以上から、リテーナ３９がファン部２６内部側となるようにベアリング３７を並べて配置すると共に、ファン部２６表面側をシールで閉塞する構成によって効果的に発塵量を抑制できることが判明した。
【０１２９】
ただ、本発明はこの構成に限定されるものでなく、例えば図２８に示すようにリテーナ３９が両端面に配置される構成としてもよい。リテーナ３９がファン部２６表面側に位置しており、ベアリングの対向面で閉塞された空間は外気と接していないため、この部分でグリスから発塵しても外部に放出されず、発塵量が抑制されると思われるからである。この場合はシールを貼付しなくともよい。
【０１３０】
また図２９に示すように、両面をリテーナ３９で閉塞してボール３８を挟み込む２ピース構造のベアリング３７Ｃも利用できる。好ましくは、図２７の構成において左側のベアリング３７Ａに変わって２ピース構造のベアリング３７Ｃを使用する。これによって、ベアリングの対向面で閉塞された空間においてもグリスからの発塵量を抑制して、全体の発塵量を確実に抑止できる。ただ、図２７の構成において右側のベアリング３７Ｂに変わって２ピース構造のベアリング３７Ｃを使用してもよく、この場合はシールを貼付しなくともよい。あるいは、両方のベアリングに２ピース構造のベアリング３７Ｃを使用する、あるいはまた一のベアリング３７Ｃでファン７を支承する構成としてもよい。
【０１３１】
【発明の効果】
以上説明したように、本発明の除電装置および除電装置用脱着ユニットは、安全かつ容易に放電電極の清掃や交換、あるいは沿面放電の発生した部分を交換することができる。それは、本発明の除電装置および除電装置用脱着ユニットが放電電極を含む部分をユニット式として、ユニットごと交換できるからである。本発明によれば除電装置の外部から除電装置用脱着ユニットを容易に交換できるので、メンテナンス作業が容易となる。また万一沿面放電が発生しても、沿面放電が生じた部分のみを交換可能とすることで、従来のように装置ごと交換、廃棄するといった無駄を回避できる。さらに本発明は、ユニットに高圧電源部を内蔵することによって、ユニットとの除電装置本体との電気接続部分が高電圧が印加されないので、コネクタ部分に低電圧用の接点が利用でき、簡単かつコンパクトな構成で安価に実現できる。さらに本発明は、放電電極のみを交換するのでなく、放電電極を支持する支持体ごと交換可能としているので、交換や保守作業が極めて容易となる。
【０１３２】
さらにまた、高電圧が使用される除電装置の安全性を高めるため、本発明では漏れ電流を検出する電流検出部を保持部に設け、大電流を検出した場合には放電を停止するよう構成することができる。またユニットの脱着を安全に行うと共に、意図しない抜け落ちを防止するために、除電装置用脱着ユニットの装着状態を検出する装着検出部や、ユニットを装着した状態でスライドをロックするためのスライド部材、スライド部材がロック位置にあることを検出するロック検出部などを備えることもできる。このように、本発明の除電装置および除電装置用脱着ユニットは、異常放電等によるトラブルの未然防止およびトラブル発生時の修理を容易にして、取り扱いの優れた除電装置および除電装置用脱着ユニットが実現される。
【図面の簡単な説明】
【図１】直流型の除電装置における電極の配置を示す概略図である。
【図２】従来の除電装置の一例を示す斜視図である。
【図３】本発明の一実施の形態に係る除電装置用脱着ユニットを斜め上方から見た斜視図である。
【図４】図３の除電装置用脱着ユニットを斜め下方から見た斜視図である。
【図５】本発明の一実施の形態に係る除電装置用脱着ユニットを除電装置本体に装着する状態を示す斜視図である。
【図６】本発明の一実施の形態に係る除電装置用脱着ユニットを除電装置本体に装着した除電装置を示す斜視図である。
【図７】本発明の一実施の形態に係る除電装置用脱着ユニットを示す断面図である。
【図８】本発明の一実施の形態に係る除電装置の放電電極を絶縁部材で被覆する状態を示す斜視図である。
【図９】放電電極の先端以外の部分で放電が発生する様子を示す概略図である。
【図１０】放電電極の外形を曲面状に構成する例を示す概略図である。
【図１１】本発明の一実施の形態に係る除電装置の放電電極を絶縁部材で被覆する状態を示す断面図である。
【図１２】本発明の他の実施の形態に係る除電装置の放電電極を絶縁部材で被覆する状態を示す断面図である。
【図１３】本発明の他の実施の形態に係る除電装置のコネクタを示す斜視図である。
【図１４】本発明の一実施の形態に係る除電装置で沿面放電が発生した場合の経路を示す概略図である。
【図１５】図６の除電装置においてスライド部材を示す斜視図である。
【図１６】スライド部材がロック検出部を切り替える状態を示す概略図である。
【図１７】本発明の一実施の形態に係る除電装置の回路図である。
【図１８】本発明の一実施の形態に係る除電装置の平面図である。
【図１９】モータ電源線および放電電極の一般的な配置例を示す概略図である。
【図２０】モータ電源線を絶縁材で被覆する状態を示す平面図である。
【図２１】従来のファン部の固定方法を示す平面図および正面図である。
【図２２】本発明の一実施の形態に係る除電装置でファン部の固定方法を示す断面図である。
【図２３】本発明の一実施の形態に係る除電装置の下ケースを外した状態でのファン部の固定状態を示す底面図である。
【図２４】本発明の一実施の形態に係る除電装置のケースを示す断面図および斜視図である。
【図２５】本発明の他の実施の形態に係る除電装置のケース開口部とファン開口部を示す概略断面図である。
【図２６】ベアリングの内部構造の示す概略断面図である。
【図２７】本発明の一実施の形態に係るベアリングの配置状態を示す概略断面図である。
【図２８】本発明の他の実施の形態に係るベアリングの配置状態を示す概略断面図である。
【図２９】本発明の他の実施の形態に係るベアリングの配置状態を示す概略断面図である。
【図３０】ベアリングの発塵量を試験した装置の概要を示す概略図である。
【符号の説明】
１・・・放電電極
２・・・高圧電源部
２Ａ・・・高圧トランス
３・・・通気口
４・・・支持体
５・・・ケース開口部
６・・・ケース
６Ａ・・・上ケース
６Ｂ・・・下ケース
７・・・ファン
８・・・保持部
９・・・内壁
１０・・・電流検出部
１１・・・装着検出部
１２・・・スライド部材
１２ａ・・・ロック片
１２ｂ・・・検出片
１３・・・ロック検出部
１４・・・本体コネクタ
１５・・・ユニットコネクタ
１６・・・高圧電源収納部
１７・・・高圧電線
１８・・・充填材
１９・・・切り欠き
２０・・・除電装置用脱着ユニット
２１・・・除電装置本体
２２・・・プラッタ
２３・・・電極針
２４・・・電界遮断部
２４Ａ・・・環状ガード
２５・・・ガード部
２５ａ・・・ガード条
２６・・・ファン部
２７・・・ファン部ケース
２８・・・ファン開口部
２９・・・モータ
３０・・・モータ電源線
３１・・・絶縁材
３２・・・ネジ穴
３３・・・ボルト
３４・・・段差部
３５・・・凹部
３６・・・狭着板
３７、３７Ａ、３７Ｂ、３７Ｃ・・・ベアリング
３８・・・ボール
３９・・・リテーナ
４０・・・内輪
４１・・・外輪
４２・・・ベアリング閉塞部
４３・・・容器
４４・・・パーティクルカウンタ
４５・・・ファンの回転軸
４６・・・接地電極
４７・・・絶縁部材
４８・・・雄型端子
４９・・・雌型端子
Ｒ・・・電流検出抵抗[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a static eliminator for neutralizing the charge of a positively or negatively charged charged body, such as an ionizer (ionizer), and a detachable unit for the static eliminator.
[0002]
[Prior art]
In a liquid crystal manufacturing line or the like, if the object is charged, dust may adhere to the product and the product may become defective.In addition, when the object is conveyed by a conveyor or the like, a small object may be charged. As a result, the products are sucked and come into contact with each other, and the production line may be stopped. Therefore, where there is a need to suppress the generation of static electricity, a large number of static eliminators are arranged in a limited space.
[0003]
Static electricity is generated by positive or negative charges accumulated in an object, and the charged potential of the object due to the static electricity is determined by measuring the surface potential of the object using the ground as a reference potential. . The principle of static elimination is to charge the electric charge accumulated in such an object to the ground or to spray ions of the opposite polarity to the accumulated electric charge to neutralize the charged potential, thereby reducing the electric charge of the object. That is, the electric charge accumulated in the charged body is brought close to zero.
[0004]
The static eliminator removes static electricity from a state where the object is positively or negatively charged according to the above principle. The corona discharge type static eliminator generates a corona discharge by applying a high DC voltage or a high AC voltage from a high voltage power supply to a discharge electrode needle. In the DC type static eliminator shown in FIG. 1, when corona discharge is generated from the needle-shaped discharge electrode 1 toward the ground electrode 46, air existing around the discharge electrode 1 is ionized, and positive or negative ions are generated. generate. The method of transporting the ionized air to the charged object can be carried out by a Coulomb force generated between the object and the ion, by a fan or other blowing means, or by supplying compressed air from outside. Then, there is a method of transporting by the air flow. The charged potential of the object is neutralized by the positive ions and the negative ions transported in this manner, so that the charged charges accumulated in the object approach zero, and the charges are eliminated.
[0005]
The positive or negative ion current generated by the static eliminator and flowing through the air can be considered as a current between the high voltage power supply and the ground. That is, the current flowing from the high-voltage power supply toward the ground corresponds to a negative ion flow, and the current flowing from the ground toward the high-voltage generating section corresponds to a positive ion flow. Due to such a correlation between the ion current and the current, if the amount of positive and negative ions generated from the static eliminator is the same, the neutralization is performed and the current becomes zero. Therefore, the static eliminator can execute static elimination correctly by maintaining the balance of the amount of generated ions.
[0006]
As such a static eliminator, for example, there is a fan type or a blower type static eliminator having a fan 7 as disclosed in Patent Document 1 shown in FIG. This type of static eliminator can transport ions toward a target object by a built-in fan 7 and eliminate static electricity over a wide range.
[0007]
[Patent Document 1]
U.S. Pat. No. 6,137,670
[0008]
[Problems to be solved by the invention]
The corona discharge type static eliminator removes foreign substances or SiO deposited at the tip of the discharge electrode from the air by discharge. ₂ Since the insulating material such as is deposited and adhered, it is necessary to periodically clean the tip. Furthermore, when used for a long time, the tip of the discharge electrode is worn by the discharge, so the electrode itself must be replaced.
[0009]
However, since the discharge electrode is mounted inside the apparatus for safety, it is necessary to temporarily disassemble the static eliminator in order to replace the electrode, and there has been a problem that a troublesome operation is required. On the other hand, if the static eliminator is contaminated by dust or the like, creeping discharge may occur. Creeping discharge is a useless discharge that does not contribute to static elimination, and has problems such as a decrease in static elimination efficiency.
[0010]
Patent Literature 1 in FIG. 2 describes an ionization device in which a platter 22 having four electrode needles 23 is modularized. This ionization device facilitates replacement of the electrode needle 23 by making the module detachable. However, in this structure, since a power supply for applying a high voltage to the electrode needle is obtained from the ionization device main body, a high voltage is applied to an electrical contact between the module and the ionization device. Therefore, an expensive connector that can withstand a high voltage is required.
[0011]
The present invention has been made to solve such a problem. SUMMARY OF THE INVENTION An object of the present invention is to provide a static eliminator and a detachable unit for the static eliminator, which can be easily attached and detached, maintenance is easy, and the connection portion has high reliability.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a static eliminator according to claim 1 of the present invention comprises at least one discharge electrode 1 for applying high voltage to air to ionize and generate ions, And a high-voltage power supply unit 2 for supplying power to the power supply. The static eliminator supplies a power to the support 4 that opens the vent 3, at least one discharge electrode 1 provided in the support 4 so as to project from the vent 3, and the discharge electrode 1. In order to hold the charge / discharge unit 20 having the high-voltage power supply unit 2, the case 6 having the case opening 5, and the charge / discharge unit 20 when the charge / discharge unit 20 is mounted. A static eliminator main body having a holding portion provided in the case; When the charge / discharge unit 20 is attached to the charge removing device main body 21, the vent 3 of the support 4 and the case opening 5 are configured to substantially coincide with each other.
[0013]
The desorption unit 20 for a static eliminator has a built-in high-voltage power supply unit 2 for discharging, and it is not necessary to receive the supply of the high-voltage power supply unit 2 from the main unit 21 for static elimination. There is no need to provide between the detachable unit 20 and the static eliminator main body 21, the contact to which a high voltage is applied can be omitted, and mechanical troubles such as poor contact can be avoided.
[0014]
Further, the static eliminator according to claim 2 of the present invention includes at least one discharge electrode 1 for applying a high voltage to air to ionize and generate ions, and a high voltage for supplying power to the discharge electrode 1. A power supply unit 2 and a fan 7 for flying ionized ions are provided. The static eliminator supplies a power to the support 4 that opens the vent 3, at least one discharge electrode 1 provided in the support 4 so as to project from the vent 3, and the discharge electrode 1. When attaching and removing the static elimination unit 20 having the high-voltage power supply unit 2, the case 6 having the case opening 5, the fan 7 provided in the case opening 5, and the static elimination unit 20 And a holding unit 8 provided on the case 6 for holding the charge / discharge unit 20 for static elimination. When the charge / discharge unit 20 is attached to the charge removing device main body 21, the vent 3 of the support 4 and the case opening 5 are configured to substantially coincide with each other.
[0015]
The desorption unit 20 for a static eliminator has a built-in high-voltage power supply unit 2 for discharging, and it is not necessary to receive the supply of the high-voltage power supply unit 2 from the main unit 21 for static elimination. There is no need to provide between the detachable unit 20 and the static eliminator main body 21, the contact to which a high voltage is applied can be omitted, and mechanical troubles such as poor contact can be avoided.
[0016]
Furthermore, the static eliminator of claim 3 of the present invention is characterized in that, in addition to claim 1 or 2, the detachable unit for static eliminator 20 has a substantially cylindrical inner wall 9 on which the discharge electrode 1 is provided on the inner surface. I do.
[0017]
The desorption unit 20 for the static eliminator includes a region between the discharge electrode 1 where the creeping discharge occurs in the vicinity of the discharge electrode 1 by including the region between the holding portion 8 of the discharge electrode 1 and the discharge electrode 1 on the exchangeable unit side. Each unit can be easily replaced.
[0018]
In addition, maintenance such as replacement work can be further facilitated by making the charge / discharge unit 20 detachable from the outside of the charge removing device.
[0019]
Furthermore, in the static eliminator according to claim 4 of the present invention, in addition to any one of claims 1 to 3, the detachable unit 20 for the static eliminator is applied with a high voltage except for the electrode tip of the discharge electrode 1. The portion is covered with an insulating member.
[0020]
As a result, the portion to which the high voltage is applied is cut off from the outside, and the occurrence of discharge from an unintended portion is prevented.
[0021]
Furthermore, in the static eliminator of claim 5 of the present invention, in addition to any one of claims 1 to 4, the static eliminator main body 21 is provided with a conductor in the holding portion 8, and the conductor is provided with the conductor. It is characterized by comprising a current detection unit 10 capable of detecting a leakage current flowing from the desorption unit 20 for a static eliminator to the outside.
[0022]
Thus, the path through which the leakage current flows can be concentrated on the holding portion 8 that is a conductor. For example, if the member is made of resin, it is difficult to specify the path of the leakage current. However, by arranging a conductive member, the path of the leakage current is fixed, and the dielectric breakdown of the device is controlled. be able to. Further, by fixing the current path, if the current flowing through this portion is monitored, the reliability of detecting the leakage current can be improved. As the conductor, a metal member, a conductive plastic, or the like can be used.
[0023]
Furthermore, in the static eliminator according to claim 6 of the present invention, in addition to claim 5, when the current detection unit 10 detects that a leakage current of a predetermined value or more flows into the holding unit 8, the discharge is stopped. It is characterized by being constituted so that.
[0024]
With this configuration, when a current equal to or larger than the threshold value flows into the conductive holding portion 8 made of metal or the like, the discharge is stopped as an abnormality, and safety can be improved.
[0025]
Furthermore, in the static eliminator according to claim 7 of the present invention, in addition to any one of the first to sixth aspects, the static eliminator main body 21 further includes a mounting detector 11 for detecting a mounting state of the static eliminator detachable unit 20. When the desorption unit 20 for the static eliminator is mounted on the main unit 21 of the static eliminator, the mounting detector 11 of the static eliminator is switched to ON, and the detachable unit 20 for the static eliminator is separated from the main unit 21. At the time of switching off.
[0026]
With this configuration, it is possible to detect the mounting state of the static eliminator detachable unit 20, and to prevent unintended removal of the static eliminator detachable unit 20.
[0027]
Furthermore, the static eliminator according to claim 8 of the present invention, in addition to any one of claims 1 to 7, for locking a slide in a state where the static eliminator detachable unit 20 is mounted on the static eliminator main body 21. It is characterized by including a slide member 12 and a lock detection unit 13 for detecting that the slide member 12 is at the lock position.
[0028]
The slide member 12 prevents the removal unit 20 for the static eliminator from falling out, and the locked state can be confirmed by the lock detection unit 13, thereby preventing unintended detachment of the detachable unit 20 for the static eliminator. Furthermore, if the static eliminator is configured not to operate unless the lock detection unit 13 is at the lock position, the static eliminator does not operate when the static eliminator detachment unit 20 is unintentionally pulled out. Accidents due to poor mounting can be avoided.
[0029]
Furthermore, in the static eliminator according to claim 9 of the present invention, in addition to any one of the first to eighth aspects, the static eliminator body 21 further discharges the discharge electrode 1 provided in the static elimination unit detachment unit 20. Is provided with a main body connector 14 for transmitting a control signal for controlling the static eliminator to the detachable unit 20 for the static eliminator. The detachable unit 20 for the static eliminator is connected to the support 4 for electrically receiving a control signal. A unit connector 15 is provided, and the unit connector 15 and the main body connector 14 are configured to be in contact with and electrically connected to each other when the static eliminator detachable unit 20 is mounted on the static eliminator main body 21. It is characterized by the following.
[0030]
With this configuration, it is possible to exchange a control signal for controlling the discharging operation between the static eliminator attaching / detaching unit 20 and the static eliminator main body 21. Further, since the high-density power supply unit 2 is built in the removing unit 20 for the static eliminator, it is not necessary to supply a high voltage for discharging the discharge electrode 1 to the connector. Therefore, the connector portion can be formed at low cost without using expensive parts for high voltage, and problems such as defective contacts due to high voltage are less likely to occur. Further, the unit connector 15 and the main body connector 14 may be configured to be engaged when the charge / discharge unit 20 is attached to the charge removing device main body 21.
[0031]
Furthermore, in the static eliminator of claim 10 of the present invention, in addition to claim 9, the unit connector 15 of the detachable unit 20 for the static eliminator is a contact plate, and the main body connector 14 of the static eliminator main body 21 is a spring connector. , And these contact portions are spring contacts.
[0032]
With this configuration, it is possible to reliably contact the connector as a contact that presses the connector with, for example, a spring structure, and it is possible to configure the connector simply and inexpensively.
[0033]
Furthermore, in the static eliminator of claim 11 of the present invention, in addition to claim 10, the detachment between the static eliminator detaching unit 20 and the static eliminator main body 21 is a slide-type insertion / removal, The direction in which the unit 20 is inserted into the static eliminator main body 21 and the direction in which the spring connector of the main body connector 14 compresses are matched.
[0034]
Since the contacts of the connectors come into contact with each other by inserting the removing unit 20 for the static eliminator, the mounting and the electrical connection of the removing unit 20 for the static eliminator can be performed simultaneously.
[0035]
According to a twelfth aspect of the present invention, the desorption unit for a static eliminator applies at least one discharge electrode 1 for applying a high voltage to air to ionize the air to generate ions, and supplies power to the discharge electrode 1. Unit 20 for a static eliminator that is detachable from a static eliminator main body 21 that includes a high-voltage power supply unit 2 and a fan 7 for flying ionized ions. The desorption unit 20 for a static eliminator includes a support 4 that opens a vent 3, at least one discharge electrode 1 provided on the support 4 so as to protrude from the vent 3, and a discharge electrode 1. A high-voltage power supply unit 2 for supplying electric power; provided when the detachable unit 20 for the static eliminator is mounted on the static eliminator main body 21, the vent 4 is provided in the support 4 and the case 6 of the static eliminator main body 21. It is characterized in that it is configured so that the case opening 5 and the case opening 5 substantially match.
[0036]
The desorption unit 20 for a static eliminator has a built-in high-voltage power supply unit 2 for discharging, and it is not necessary to receive the supply of the high-voltage power supply unit 2 from the main unit 21 for static elimination. There is no need to provide between the detachable unit 20 and the static eliminator main body 21, the contact to which a high voltage is applied can be omitted, and mechanical troubles such as poor contact can be avoided.
[0037]
Further, the charge / discharge unit for a static eliminator according to claim 13 of the present invention is characterized in that, in addition to claim 12, a substantially cylindrical inner wall 9 on which the discharge electrode 1 is further provided on the inner surface.
[0038]
The removal unit 20 for a static eliminator includes a region between the discharge electrode 1 and the discharge electrode 1 where the creeping discharge occurs by including the region between the holding portion 8 of the discharge electrode 1 and the discharge electrode 1 on the replaceable unit side. The creeping discharge may occur on, for example, the inner wall 9 provided with the discharge electrode 1 or the surface of the support 4. By including the electrodes and the short-circuit path between the electrodes on the unit side, even if creeping discharge occurs, the entire unit can be replaced and easily restored.
[0039]
In addition, maintenance such as replacement work can be further facilitated by making the charge / discharge unit 20 detachable from the outside of the charge removing device.
[0040]
Furthermore, in the desorption unit for a static eliminator according to claim 14 of the present invention, in addition to claim 12 or 13, except for the electrode tip of the discharge electrode 1, a portion to which a high voltage is applied is covered with an insulating member. It is characterized by becoming.
[0041]
As a result, the portion to which the high voltage is applied is cut off from the outside, and the occurrence of discharge from an unintended portion is prevented.
[0042]
Further, the charge / discharge unit for a static eliminator according to claim 15 of the present invention is further provided in the charge / discharge unit for desorption unit 20 sent from the charge eliminator main body 21 in addition to any of claims 12 to 14. A unit connector 15 provided on the support body 4 for electrically receiving a control signal for controlling the discharge of the discharge electrode 1 is provided, and when the detachable unit 20 for the static eliminator is mounted on the static eliminator main body 21. The main body connector 14 and the unit connector 15 provided on the static eliminator main body 21 are configured to be in contact with and electrically connected to each other.
[0043]
This makes it possible to exchange a control signal for controlling the discharging operation between the static eliminator attaching / detaching unit 20 and the static eliminator main body 21. In addition, since the high-voltage power supply unit 2 is built in the desorption unit 20 for the static eliminator, it is not necessary to apply a high voltage for discharging the discharge electrode 1 to the connector. Therefore, the connector portion can be formed at low cost without using expensive parts for high voltage, and problems such as defective contacts due to high voltage are less likely to occur. Further, the unit connector 15 and the main body connector 14 may be configured to be engaged when the charge / discharge unit 20 is attached to the charge removing device main body 21.
[0044]
Furthermore, in the charge / discharge unit for a static eliminator according to claim 16 of the present invention, in addition to claim 15, the unit connector 15 of the charge / discharge unit 20 is a contact plate, It is a spring connector, and these contact portions become spring contacts.
[0045]
As a result, the contact can be reliably made as a contact for pressing the connector by, for example, a spring structure, and a simple and inexpensive configuration can be achieved.
[0046]
Furthermore, in the charge / discharge unit for a static eliminator according to claim 17 of the present invention, in addition to claim 16, detachment between the charge / discharge unit 20 for a static eliminator and the charge eliminator main body 21 is a slide-type insertion and removal. It is characterized in that the direction of insertion of the device attaching / detaching unit 20 into the static elimination device main body 21 and the direction of compressing the spring connector of the main body connector 14 coincide.
[0047]
Since the contacts of the connectors come into contact with each other by inserting the removing unit 20 for the static eliminator, the mounting and the electrical connection of the removing unit 20 for the static eliminator can be performed simultaneously.
[0048]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a static eliminator and a desorption unit for the static eliminator for embodying the technical idea of the present invention, and the present invention refers to a static eliminator and a desorption unit for the static eliminator below. Not specific to
[0049]
Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members described in the embodiments are referred to as “claims” and “means for solving the problems”. Column). However, the members described in the claims are not limited to the members of the embodiments. In addition, the size, positional relationship, and the like of the members illustrated in each drawing may be exaggerated for clarity of description. Further, in the following description, the same names and reference numerals denote the same or similar members, and a detailed description thereof will be omitted as appropriate. Further, each element constituting the present invention may be configured such that a plurality of elements are configured by the same member and one member also serves as the plurality of elements, or conversely, the function of one member may be performed by a plurality of members. It can also be realized by sharing.
[0050]
Hereinafter, an example in which a static elimination device is applied to an ionization device having a fan will be described as an embodiment of the present invention. However, the present invention can also be used for an ozonizer that generates ozone. Further, the present invention can be applied to a type using either an AC power supply or a DC power supply as a high-voltage power supply.
[0051]
FIGS. 3 and 4 are perspective views of the detachable unit for a static eliminator according to an embodiment of the present invention. FIG. 5 is a perspective view showing a state in which the detachable unit for the static eliminator is attached to the static eliminator main body 21. 2 shows a static eliminator in which a detachable unit for the static eliminator is mounted on the static eliminator main body 21. As shown in these figures, the charge / discharge unit 20 including the discharge electrode 1 and the high-voltage power supply unit 2 is detachable from the charge removal device main body 21, so that the worn discharge electrode 1 and the like can be easily replaced. it can.
[0052]
[Removal unit 20 for static eliminator]
FIG. 3 is a perspective view of the removing unit 20 for a static eliminator as viewed obliquely from above, and FIG. 4 is a perspective view as viewed from obliquely below. In the desorption unit 20 for a static eliminator shown in these figures, a substantially circular vent 3 is opened in the center of a rectangular and substantially flat support 4. The support 4 is formed of plastic, resin, or the like. The inner wall 9 which is the inner surface of the hollow cylinder constituting the vent 3 is provided with four discharge electrodes 1 provided so as to project toward the center of the opening of the vent 3. In addition to directly fixing the discharge electrode 1 to the inner wall 9, it is also possible to fix only the electrode by exchanging the electrode by fixing the electrode holding portion that detachably holds the discharge electrode 1 to the inner wall 9.
[0053]
The size of the charge / discharge unit 20 is substantially the same as or slightly smaller than that of the charge removing device main body 21, and is formed in a size and shape that can be inserted into the holding portion 8 of the charge removing device main body 21. When the static eliminator detachable unit 20 is mounted on the static eliminator main body 21, the size of the vent 3 is set so that the vent 3 of the static eliminator detachable unit 20 and the case opening 5 of the static eliminator main body 21 almost coincide with each other. And the location is designed.
[0054]
As shown in FIGS. 3 and 4, the rear end of the removing unit 20 for the static eliminator is provided with a high-voltage power supply storage unit 16 that protrudes downward and stores the high-voltage power supply unit 2. By providing the high-voltage power supply housing 16 on the rear end side with respect to the mounting direction of the unit, the thin portion having a substantially constant thickness is inserted into the static eliminator main body 21, and the thick portion at the rear end is finally neutralized. Since it can be configured to be housed in the case 6 of the apparatus main body 21, it can be made into a shape that can be easily inserted and detached, the space for inserting the unit required for the static eliminator main body 21 can be reduced, and the inside of the case 6 can be used efficiently. it can.
[0055]
As the high-voltage power supply unit 2, a high-voltage transformer 2A that boosts a power supply voltage to a predetermined voltage can be used. As shown in the cross-sectional view of FIG. 7, the high-voltage power supply unit 2 stored in the high-voltage power supply storage unit 16 is connected to the discharge electrode 1 by a high-voltage electric wire 17. The high-voltage power supply unit 2 shown in this figure is composed of two circuit boards in which a positive terminal and a negative terminal are separated. Since the static elimination unit 20 incorporates the high-voltage power supply unit 2, a circuit for the high-voltage power supply unit 2 can also be incorporated in the unit, thereby eliminating the need to supply a high voltage to the outside, that is, to the static elimination device main body 21. It is not necessary to provide a connector for high voltage.
[0056]
[Insulating member 47]
The discharge electrode 1 is a needle-shaped electrode needle made of a sharp metal, and is covered with an insulating member 47 except for a tip portion as shown in FIG. As a result, it is possible to prevent discharge from portions other than the tip portion of the electrode, and to obtain a stable discharge.
[0057]
The static eliminator can stabilize the discharge by suppressing the discharge from portions other than the needle-shaped discharge electrode 1 and obtain a stable static elimination ability. For example, when the ground electrode 46 and the discharge electrode 1 are arranged in parallel in FIG. 1, discharge may occur at a portion other than the tip of the discharge electrode 1 as shown in FIG. 9. Corona discharge occurs in a portion where the electric field is not uniform. Although corona discharge is most likely to occur at the tip of the discharge electrode 1, it may also occur in areas where the surface is not smooth, such as machining marks on the electrode. The discharge should be performed between the discharge electrodes 1 at the tip of the discharge electrode 1, and the discharge on the side surface other than the tip hinders the original discharge and is not desirable.
[0058]
In order to solve this problem, there is a method of forming the discharge electrode 1 into a shape having a curved surface with a smooth boundary as shown in FIG. Can be For example, after processing the discharge electrode 1, the surface is smoothed by electrolytic polishing or the like. However, this method requires more labor and cost for machining than the discharge electrode 1 shown in FIG. This is because the discharge electrode 1 of FIG. 9 can be formed into a conical shape with a lathe and can be easily formed, while the discharge electrode 1 of FIG. 10 requires more man-hours.
[0059]
Therefore, in the present embodiment, as shown in FIG. 11, the discharge electrode 1 is covered with the insulating member 47 except for the tip of the discharge electrode 1. In this method, there is no need to process the discharge electrode 1 into a special shape, a conventional discharge electrode can be used, and the method can be realized at low cost. In particular, there is an advantage that the insulating member 47 can be easily added to an existing static eliminator and applied.
[0060]
Resin, ceramic, or the like can be used for the insulating member 47. As shown in FIG. 11, for example, the insulating member 47 covers the side surface of the columnar portion of the discharge electrode 1 as a hollow substantially cylindrical insulating tube. The outer shape of the insulating tube may be formed in a conical shape, a prism shape, or a prism shape. Preferably, as shown in FIG. 12, in addition to the cylindrical portion of the discharge electrode 1, the boundary between the cylindrical portion and the conical portion is also covered with the insulating member 47. The insulating member 47 is formed by covering the discharge electrode 1 with a resin or ceramic cylinder, forming a semi-cylindrical shape, and narrowing it from both sides, or integrally molding the discharge electrode 1 with resin. Coating 1 By covering an area other than the tip of the discharge electrode 1 with an insulating member 47 such as a resin or ceramics, discharge from areas other than the needle tip can be prevented, and a stable discharge can be obtained. Since the discharge occurs in a portion where the electric field is non-uniform, it is preferable that the portion of the discharge electrode 1 not covered with the insulating member 47 has a smooth surface other than the sharp tip of the tip of the needle. Since the discharge is stabilized by coating with the insulating member 47 as described above, an improvement in the charge removal rate and an improvement in the ion balance can be obtained.
[0061]
As shown in the cross-sectional view of FIG. 7, the discharge electrode 1 is divided into a positive electrode and a negative electrode, each of which is connected to the positive side and the negative side of the high voltage power supply section 2 by a high voltage electric wire 17. After wiring, the high-voltage electric wire 17 is molded with a filler 18. The output voltage of the high-voltage power supply unit 2 is supplied to the discharge electrode 1 via the high-voltage wire 17 to perform corona discharge and generate positive and negative ions from the tip of the electrode.
[0062]
In the static eliminator of the present invention, the configuration for generating positive and negative ions is not limited to this. For example, an electrode means such as a long object such as a thin wire or a member having a projection is attached to the positive / negative high-voltage power supply unit. Can be used as an ion generator.
[0063]
[connector]
As shown in FIG. 4, a cutout 19 for locking the slide by the slide member 12 of the static eliminator main body 21 is formed on one side surface of the high-voltage power supply housing 16. Further, a unit connector 15 for connecting to the main body connector 14 of the static eliminator main body 21 is provided on the opposite side surface. The unit connector 15 shown in FIG. 4 is a contact plate protruding from the lower surface of the static eliminator detachable unit 20 so as to face in the insertion direction of the static eliminator detachable unit 20. The contact plate is a flat plate having a plurality of contacts that are exposed, and can be electrically connected to the main body connector 14 of the static eliminator main body 21 when the static eliminator detachable unit 20 is mounted on the static eliminator main body 21. It is configured in various positions and shapes. In FIG. 5, a contact plate is provided at an end of the charge / discharge unit 20 on the side where the high-voltage power supply housing 16 is provided.
[0064]
Since this connector does not apply a high voltage for discharge but is a current-carrying terminal for controlling discharge, a contact for low voltage can be used, and it can be realized with a simple configuration at low cost. In addition, since the connection between the static eliminator attaching / detaching unit 20 and the static eliminator main body 21 is low voltage, the reliability of the contact portion is also improved.
[0065]
On the other hand, a spring connector is used on the static eliminator main body 21 side as shown in FIG. Since the tip of the spring connector is urged and protruded by the action of the spring, the spring connector is pressed against and comes into contact with the contact plate, so that electrical connection is reliably achieved. In particular, the removal unit 20 for a static elimination device shown in FIG. 5 is configured to be guided by the holding unit 8 and inserted into the static elimination device main body 21 in a sliding manner and mounted. At this time, the spring connector is provided in a posture protruding toward the insertion direction of the charge / discharge unit 20. As a result, the direction of insertion of the static eliminator detachable unit 20 and the direction of compressing the spring connector of the main body connector 14 match. Therefore, when the static eliminator detachable unit 20 is inserted, the spring connector is compressed from the front and is brought into contact with the contact plate. Pressing to obtain a reliable electrical connection. Further, by the insertion operation of the static eliminator detachable unit 20, the mounting of the static eliminator detachable unit 20 and the electrical connection with the static eliminator main body 21 can be performed simultaneously.
[0066]
In addition, an inexpensive contact plate is used for the unit connector 15 provided in the exchangeable removing unit 20 for the static eliminator, and a spring connector is used for the main unit connector 14 provided in the static eliminator main body 21, so that the replacement component side can be used. Inexpensive contacts are used for the connector, which can further contribute to cost reduction.
[0067]
The spring connector may be a cylindrical metal contact protruding from the hollow cylindrical support portion as shown in FIG. 5, or may be formed of another elastic member such as a leaf spring having a curved tip. Further, the contact plate is not limited to a flat plate shape, and for example, a contact portion may be slightly protruded.
[0068]
Furthermore, the configuration may be such that the connectors are engaged with each other. For example, as shown in FIG. 13 (a), the main body connector 14 is a protruding male terminal 48, and as shown in FIG. 13 (b), the unit connector 15 is tightly fitted on both sides or around the male terminal 48. The combination of the mold terminals 49 is also possible. It is needless to say that the female connector can be used for the main connector 14 and the male connector can be used for the unit connector 15 by exchanging the two.
[0069]
[Static eliminator main body 21]
The removing unit 20 for a static eliminator is detachably attached to the static eliminator main body 21 in a sliding manner as shown in FIG. FIG. 6 shows a static eliminator in which the static eliminator detaching unit 20 is mounted on the static eliminator main body 21. The static eliminator main body 21 includes the case 6, and includes the fan 7 inside the case 6, a motor 29 for rotating the fan 7, and the holding unit 8 for holding the static eliminator detachable unit 20.
[0070]
The case 6 is made of plastic and is divided into an upper case 6A and a lower case 6B. The upper case 6A and the lower case 6B each have a substantially circular case opening 5 at the center. Each case opening 5 is provided with a mesh-pattern grid to prevent foreign matter from being inserted into the case and damaged by the rotating fan 7. The mesh pattern differs between the upper case 6A and the lower case 6B, but may be the same pattern. As the mesh pattern, in addition to a rectangular grid, various patterns such as concentric, radial, and spiral patterns are appropriately adopted.
[0071]
A fan 7 rotated by a motor 29 is fixed inside the case 6. The fan 7 transports the air ionized by the discharge toward the object to be neutralized. The rotation shaft 45 of the fan is disposed so as to substantially coincide with the center of the case opening 5. The motor 29 is an electric motor, and rotates by receiving electric power from the outside.
[0072]
[Holding unit 8]
FIG. 5 shows a state in which the upper case 6 </ b> A of the static eliminator main body 21 is removed and the holding unit 8 can be checked for the sake of explanation. The holding unit 8 shown in FIG. 5 is a rail-shaped guide formed in a U-shaped cross section. The holding portion 8 is provided symmetrically on the left and right inside the case 6 so that the U-shaped opening surface is opposed to the holding portion 8 so as to be held on the side surface of the unit along the insertion direction of the charge / discharge unit 20. The end of the removing unit 20 for a static eliminator is inserted into a U-shaped guide, and the unit is slidably held. The holding portion 8 is made of a conductive material such as metal or conductive plastic. Alternatively, the holding portion 8 itself may be formed of an insulating member, and a conductor such as a bent metal plate may be provided on the U-shaped inner surface. In this specification, “providing a conductor on the holding portion” is used in a sense that includes forming the holding portion itself from a conductor and adding a separate conductor. The holding unit includes a member that is elastically deformed, such as a leaf spring, and elastically deforms and holds the detachable unit for the static eliminator inserted into the U-shaped opening surface with the elastically deformable member.
[0073]
The holding unit having conductivity is connected to the secondary-side ground terminal of the high-voltage transformer 2A constituting the high-voltage power supply unit. The high-voltage transformer 2A is illustrated in FIG. 17 described later. Thereby, a leakage current from the discharge electrode 1 to the outside can be induced and captured. That is, when the leakage current of the discharge is transmitted from the discharge electrode 1 to the outside, the current tends to be directed to the holding portion 8 which is a conductor arranged close to the discharge electrode 1, and the leakage current is captured by the holding portion 8. Is done.
[0074]
Further, as shown in FIG. 14, a current detecting unit 10 for detecting a leakage current may be provided between the holding unit and the secondary-side ground terminal of the high-voltage transformer 2A. As the current detection unit 10, a galvanometer, a resistor, or the like can be used. When a resistor is used, the current value is calculated by measuring the voltage across the resistor. By detecting the current flowing in the holding unit 8 with the current detection unit 10, a leakage current that does not contribute to static elimination is reliably detected. Further, when the current detection unit 10 detects a leakage current equal to or more than a predetermined value, it may be determined that the current is abnormal, and the power supply may be stopped to prevent abnormal discharge from occurring any more.
[0075]
In general, since the static eliminator is formed of a plastic or resin case, which is an insulator, it is difficult to specify a path through which an unintended discharge is transmitted. However, by intentionally arranging the conductor, the path of the leakage current can be fixed to some extent, and the device can be protected. Further, by monitoring the portion where the current is likely to be concentrated by the current detection unit 10, the reliability of the leakage current detection is enhanced, and by making the unit replaceable, maintenance and maintenance can be facilitated. As described above, the static eliminator and the detachable unit 20 for the static eliminator according to the embodiment of the present invention can prevent troubles due to abnormal discharge and the like and facilitate repair when troubles occur, and provide excellent static elimination devices and static elimination. The device attaching / detaching unit 20 is realized.
[0076]
Further, when the current detection unit 10 detects a current equal to or more than a predetermined value, the current detection unit 10 may determine that the current is abnormal, issue a warning, or stop discharging. For example, when it is detected that a large current has flowed into the holding unit 8, it is considered that abnormal discharge has occurred. In such a case, the discharge can be automatically stopped to ensure safety.
[0077]
With the above configuration, safety is improved by detecting unintended discharges and leakage currents, and when contamination occurs due to condensation, etc., parts can be easily replaced, making it easier to use a static eliminator. Has been improved. As shown in FIG. 14, the creeping discharge occurs between the electrodes or between the electrodes and the outside of the device. With respect to the creeping discharge between the electrodes, not only the discharge electrode 1 but also the creeping discharge near the discharge electrode 1 such as the holding portion 8 of the discharge electrode 1 and the inner wall 9 where the discharge electrode 1 is disposed is generated in the desorption unit 20 for the static eliminator. By including the region, the portion where the surface discharge has occurred can be entirely replaced. The replacement of the unit can be performed very simply and quickly because the unit only needs to be attached and detached, so that repair and recovery are easy even if creeping discharge occurs.
[0078]
On the other hand, with respect to the discharge from the electrode to the outside, the holding portion 8 holding the unit is made of a conductor, so that the conductor can hold the leakage current and prevent the discharge to other parts. Further, if the discharge is stopped by detecting this current, safety can be ensured. Furthermore, the conductor holding portion 8 may be replaceable.
[0079]
This configuration is also very effective for maintenance of the discharge electrode 1. By repeating the discharge, an insulating material is deposited on the tip of the discharge electrode 1, so that the tip needs to be cleaned periodically. Further, when the tip of the discharge electrode 1 is worn due to long-term use, the electrode itself must be replaced. Conventionally, since the electrodes are mounted inside the device, it has been difficult to clean and remove them. According to the present invention, it is possible to easily clean and replace the electrode by separating from the static eliminator body 21 together with the static elimination unit 20 provided with the discharge electrode 1.
[0080]
[Slide member 12]
As shown in FIG. 5, the static eliminator main body 21 has a slide member 12 provided on one side surface. FIG. 15 is a perspective view of a state in which the static eliminator detachable unit 20 is mounted on the static eliminator main body 21 as viewed from below. The slide member 12 is locked so that the slide member 12 does not come off in a state where the charge / discharge unit 20 is attached to the charge removing device main body 21. The slide member 12 is held by the static eliminator main body 21 in a state in which it can slide up and down in the figure. At the upper end of the slide member 12, a lock piece 12a is integrally formed to protrude inside the static eliminator body 21.
[0081]
As described above, the notch 19 is provided in the removing unit 20 for the static eliminator, and the size and the position of the notch 19 are determined by the lock piece 12a when the detachable unit 20 for the static eliminator is mounted on the static eliminator main body 21. Are designed to be inserted exactly. With this configuration, when inserting the removing unit 20 for the static eliminator, the slide member 12 is once slid downward, and after inserting the detaching unit 20 for the static eliminator, the slide member 12 is pushed up to attach and remove the lock piece 12a for the static eliminator. It is inserted into the notch 19 of the unit 20, and the charge / discharge unit 20 is fixed in the locked state. When the charge removing unit 20 is removed from the charge removing device main body 21, the slide member 12 is slid downward to release the locked state. In this manner, by inserting the lock piece 12a in a direction substantially perpendicular to the insertion direction of the charge / discharge unit 20 for a static eliminator, the locked state becomes strong, and unintended detachment is reliably prevented. In addition, as shown in FIG. 15, since the position of the slide member 12 can be confirmed from the outside to be in the locked position, the locked state can be visually confirmed.
[0082]
The slide member 12 may be provided with an elastically deformable locking piece so as to be locked at the upper “lock position”. Alternatively, a locking piece that is also elastically deformed may be provided with the position where the lock state is released by sliding downward as the “lock release position”.
[0083]
Further, a lock detection unit 13 that electrically detects that the slide member 12 is at the lock position may be provided. The lock detection unit 13 is configured to switch ON / OFF in conjunction with the locked state of the slide member 12. For example, as shown in FIG. 16, the lock detecting unit 13 is a push-type switch that is turned on by pressing an inclined spring. One of the slide members 12 has a detection piece 12b which is horizontally protruded and integrally formed inside the static eliminator main body 21. The tip of the detection piece 12b slides on the leaf spring surface of the lock detection unit 13 by the vertical movement of the slide member 12, and the lock detection unit 13 is turned on when slid upward, which is the lock position, to release the lock. When slid downward, the detection piece 12b releases the pressing of the leaf spring, and the lock detection unit 13 is turned off. Further, a pilot lamp for displaying the locked state may be provided on the static eliminator main body 21. It can be configured to light up when the pilot lamp lock detector 13 is ON and turn off when it is OFF, or to emit green when ON and red when OFF. Alternatively, a configuration may be adopted in which some message such as a warning sound prompting the user when the switch is turned off is issued.
[0084]
As a result, the locked position of the slide member 12 is reliably detected not only mechanically but also electrically, and the unintended detachment of the removing unit 20 for the static eliminator is doubled by visual confirmation of the locked position and electrical confirmation by the lock switch. You can check. Furthermore, if the static eliminator is configured not to operate unless the lock detection unit 13 is at the lock position, the static eliminator does not operate when the static eliminator detachment unit 20 is unintentionally pulled out. Accidents due to poor mounting can be avoided.
[0085]
For example, the lock detection unit 13 may be linked with a power switch of a static eliminator or a switch of a high-voltage power supply. Even if the user mistakenly attempts to attach / detach the removing / attaching unit 20 for the static eliminator while keeping the power switch of the static eliminator ON, when the user releases the locked state of the slide member 12, the lock detecting unit 13 switches to OFF. The high-voltage power supply unit 2 is turned off. This makes it possible to safely attach / detach the charge / discharge unit 20.
[0086]
The removing unit 20 for a static eliminator shown in FIG. 4 has a connector that locks the slide member 12 on one side and electrically connects to the static eliminator main body 21 on the other side, and separates these members. In such a case, the limited space of the high-voltage power supply storage unit 16 is efficiently used, the members are concentrated in one place, and the device becomes complicated and large. Avoids mechanical troubles. However, the arrangement of the members such as the slide member 12 and the connector is not limited to the above example. For example, the connector may be arranged at the center of the high-voltage power supply housing 16 or at the tip of the removing unit 20 for the static eliminator. Various forms such as providing a plurality of on both sides can be used as appropriate.
[0087]
[Mounting detector 11]
Further, as shown in FIG. 5, the static eliminator main body 21 can also include a mounting detection unit 11 that detects a mounting state of the static eliminator removing unit 20. The attachment detection unit 11 is automatically switched so as to be turned on when the charge removing unit 20 is attached and turned off when detached. As the attachment detection unit 11, a switch whose switch is mechanically turned on at the time when the charge / discharge unit 20 is attached can be used. For example, when the attachment detection unit 11 is a push button type switch, and the removal unit 20 for the charge removal device is inserted into the body 21 of the charge removal device, the switch is pressed at the tip of the removal unit 20 for the charge removal device to be turned ON, and the attachment state is set. Is detected. When separated, the switch is released and turned off, and it is detected that the attachment has been released. With this configuration, it is possible to detect the mounting state of the static eliminator detachable unit 20, and to prevent unintended removal of the static eliminator detachable unit 20.
[0088]
Further, the means for detecting ON / OFF is not limited to this configuration. For example, a configuration may be adopted in which the generation of ions is detected, and thereby the static eliminator is determined to be in the ON state.
[0089]
The above-mentioned desorption unit 20 for a static eliminator is mounted and used on a static eliminator main body 21 as follows.
(1) The slide member 12 of the static eliminator main body 21 is positioned at the lower “unlocked position”.
[0090]
(2) Insert the end of the static eliminator detachable unit 20 into the opening surface of the holding portion 8 of the static eliminator main body 21, and slide the static eliminator detachable unit 20 along the holder 8 to remove the static eliminator main body 21. Push it all the way into case 6. When the removing unit 20 for a static eliminator is correctly inserted to the depth of the case 6, the tip of the unit comes into contact with the mounting detection unit 11 provided in the depth of the case 6, and is switched on. Further, the tip of the spring connector of the main body connector 14 provided on the static eliminator main body 21 is pressed by the unit connector 15 of the detachable unit 20 for the static eliminator to be electrically connected.
[0091]
(3) The slide member 12 provided on the side surface of the case 6 is slid upward to set the lock position. At this time, the lock piece 12a of the slide member 12 is pushed up and inserted into the notch 19 of the static eliminator detachable unit 20, and the static eliminator detachable unit 20 is fixed in a locked state. Further, the lock detecting unit 13 is turned ON, and the locked state can be electrically confirmed. When the lock detecting unit 13 is ON, the static eliminator becomes usable. A high voltage is applied to the discharge electrode 1 to generate corona discharge, ionizing air near the electrode to generate positive and negative ions, and the ionized ions are transported by the rotation of the fan 7 to neutralize the target. Is performed.
[0092]
(4) When separating the charge removal unit 20 from the charge removal device main body 21, the slide member 12 is slid from the "lock position" to the "lock release position" in the opposite manner to the above. As a result, the lock detection unit 13 is turned off, the high voltage is not supplied, and the lock detection unit 13 can be safely removed. Further, since the lock piece 12a is pulled out from the notch 19, the locked state is released and the unit can be pulled out from the case 6. As a result, the unit can be safely attached and detached.
[0093]
[Control of ion balance]
FIG. 17 shows an example of a circuit diagram of the static eliminator. The static elimination of the charged body is performed by spraying ions having a polarity opposite to the charged polarity. Since the flow of ions at this time is formed with the ground as the reference potential, the amount of ions generated by the neutralization device, either positive or negative, is the amount of ions generated by the other polarity. When the number is larger than the above, the ion balance is deteriorated and the object is charged in reverse.
[0094]
As shown in FIG. 17, the current flowing from the high-voltage transformer 2A constituting the high-voltage power supply unit 2 is discharged by the discharge electrode 1 to become ions, and returns to the high-voltage transformer 2A after roughly passing through three paths. That is, (1) it is absorbed by the discharge electrode 1 of the opposite polarity. (2) Structural components inside the static eliminator pass through the electronic board. (3) It is released from the static eliminator to the outside and contributes to effective static elimination. The current of (3) is a current that returns to the static eliminator through the ground wire. Therefore, in the static eliminator of FIG. 17, the secondary side of the high voltage transformer 2A and the ground are connected by a current detection resistor R, and the current flowing therethrough is detected to measure the ion balance. Since the flow of ions is formed with the ground as a reference potential, if the amount of generated positive or negative ions is larger than the other, the difference value is the current detected by the current detection resistor R. Is proportional to the size of Therefore, by measuring the magnitude and direction of the current flowing through the current detection resistor R, it is possible to determine how much positive or negative ions are generated from the static eliminator. Therefore, the ion balance can be maintained by feedback-controlling the circuit based on the current flowing through the current detection resistor R. In the above example, the amount of generated positive ions is fixed, and the amount of generated negative ions is adjusted based on the current detected by the current detection resistor R, thereby controlling the ion balance. Of course, it is needless to say that the ion balance can be adjusted with the amount of generated positive ions or with both positive and negative ions.
[0095]
[Electric field blocking unit 24]
Since a high voltage is applied to the discharge electrode 1 of the static eliminator, an electric field is generated around it. When the object to be neutralized is at a short distance, electric charges are induced by this electric field. A metal net or the like is effective for shielding the electric field, but when the shielding area is increased, the static elimination ability is reduced. The inventors of the present invention have conducted intensive studies on a method for reducing the induction of electric charges with a minimum shielding area. As a result, only the distal end portion of the discharge electrode 1 is shielded by the electric field cutoff unit 24 to minimize the reduction in the charge removal ability. It has been found that the induction of electric charge can be sufficiently suppressed while suppressing it.
[0096]
FIG. 18 shows a plan view of the static eliminator according to one embodiment of the present invention. The static eliminator shown in this figure has a case 6 provided with a substantially circular case opening 5 in the center, a fan 7 rotatably supported inside the case 6, and guards the case opening 5 on the front surface of the fan 7. It comprises a guard portion 25 and four discharge electrodes 1 arranged in a substantially cross shape so as to protrude at the opening.
[0097]
[Guard part 25]
The guard portion 25 covers the case opening portion 5 in a net shape, and protects the user from accidentally inserting a finger or the like and preventing foreign substances sucked into the fan 7 from coming into contact with the fan 7. The guard portion 25 is made of metal and has conductivity, and a plurality of linear or flat guard strips 25a are integrally formed to form a lattice pattern. The guard strip 25a includes an annular guard 24A formed in an annular shape substantially concentric with the case opening 5, and is also integrally molded. The annular guard 24A is designed such that the tip of the discharge electrode 1 is located on the circumference thereof. Thus, the annular guard 24A constitutes a conductive electric field cut-off portion 24, which effectively prevents the electric field from leaking from the discharge electrode 1 to the outside and inducing electric charge to the object. In particular, since a strong electric field is generated at the distal end of the discharge electrode 1, the annular guard 24A, which is the electric field cutoff section 24, is arranged so as to overlap this part. Since the discharge electrodes 1 are provided on the inner wall of the cylindrical vent 3 so as to protrude toward the center, the trajectory of the tip of each discharge electrode 1 also has a concentric circumference. Therefore, if the electric field cutoff portion 24 is formed in a ring shape having a predetermined radius, it can be easily positioned so as to overlap with the tip portion of the discharge electrode 1 regardless of the number of the discharge electrodes 1 and the fixing position.
[0098]
The guard 25 is connected to the secondary-side ground terminal of the high-voltage transformer 2A. By grounding the electric field cutoff 24, the discharge electrode 1 and the target can be effectively cut off. On the other hand, ions absorbed by the electric field cutoff 24 and the guard 25 do not contribute to static elimination. Should not be considered in the measurement of Therefore, by connecting to the secondary side ground terminal of the high voltage transformer 2A without passing through the current detection resistor R, the ion balance can be correctly measured.
[0099]
In addition, the shape of the electric field cut-off portion 24 is not limited to a ring shape, and may be formed, for example, in a square shape so that four corners overlap the tip portion of the discharge electrode 1. Further, among the grid-like guards, a plurality of horizontal or vertical linear guards may be made to coincide with the tip portion of the discharge electrode 1.
[0100]
Further, in the embodiment shown in FIG. 18, the annular guard 24A is formed integrally with the guard portion 25, but the electric field blocking portion 24 may be provided as a separate member. For example, a metal annular guard may be used as a separate member, welded to the guard portion, fixed so that electrical connection can be obtained, or connected to the secondary-side ground terminal of the high-voltage transformer 2A. By forming the electric field interrupting unit as a separate member, the electric field interrupting unit can be easily added to the existing static eliminator, and the existing electric static eliminator is disposed so as to overlap the tip of the discharge electrode 1. An electric field blocking effect can also be obtained in equipment.
[0101]
Furthermore, the holding unit 8 holding the charge / discharge unit 20 is also connected to the secondary-side ground terminal of the high-voltage transformer 2A. As a result, ions that are absorbed in this portion and do not contribute to the charge removal do not flow through the current detection resistor R, and the ion balance can be accurately measured.
[0102]
[Fan unit 26]
FIG. 19A shows the configuration of the fan unit 26 including the fan 7. The fan portion 26 is opened to the fan portion case 27, the fan 7 rotatably supported by the fan portion case 27, and the fan 7 to send out the air from the fan 7 to the outside of the fan portion case 27. It includes a fan opening 28, a motor 29 for rotating the fan 7, and a motor power supply line 30 for supplying electric power to the motor 29. The motor 29 rotates the rotor of the fan 7 about the rotation shaft 45 by the action of an electromagnet and a coil, as shown in FIG. The shaft of the rotating shaft 45 is supported by a housing of the fan case 27 via a bearing 37.
[0103]
All of the ions generated at the discharge electrode 1 are not emitted to the outside, and part of the ions are absorbed by the components and the electronic substrate inside the static eliminator. As a result of the research conducted by the present inventors, when the size of the static eliminator is reduced, the distance between the discharge electrode 1 and the power line of the motor 29 for driving the fan 7 is reduced due to the miniaturization. It has been found that the rate of flow into the line increases. The control method of the static eliminator has such a characteristic that when ions not contributing to static elimination flow from the power supply line to the ground, the ion balance deteriorates. Therefore, it is necessary to minimize the current flowing to the ground via the power supply line of the motor 29. Therefore, in the present embodiment, the mounting position of the discharge electrode 1 is set so that the position of the motor power supply line 30 does not overlap, and a distance is provided between them to reduce the inflow of invalid ions into the motor power supply line 30. I have. Specifically, in the case opening 5 where the discharge electrode 1 is provided, when the top of a circle forming the opening is 0 °, 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, It is arranged at a position other than 270 ° and 315 °.
[0104]
FIGS. 19A to 19C show general arrangement examples of the motor power supply line 30 and the discharge electrode 1. Generally, the motor power supply line 30 for driving the axial fan is often arranged at any one of the four corners of the fan section 26 due to an arrangement space as shown in FIG. Therefore, for example, when the four discharge electrodes 1 are arranged in a cross shape, as shown in FIG. 19B, the discharge electrodes 1 are set at angles of 45 °, 135 °, 225 °, and 315 ° corresponding to the four corners of the static eliminator. Is arranged, one of the discharge electrodes 1 overlaps with the motor power supply line 30, and the absorption of ions becomes remarkable in this portion. Therefore, by arranging the discharge electrode 1 avoiding these nearby positions, it is possible to avoid overlapping with the motor power supply line 30 and reduce the amount of ion absorption.
[0105]
On the other hand, when the discharge electrode 1 is arranged at a position of a cross formed apart from the four corners, that is, near 0 °, 90 °, 180 °, and 270 ° corresponding to the horizontal and vertical directions, the discharge electrode is now discharged as shown in FIG. There is a problem in that a space for holding the electrode 1 is required, and the size of the static eliminator increases both vertically and horizontally. From the relation of space, it is preferable to arrange the discharge electrodes 1 near the four corners as shown in FIG. 19B. However, since the motor power supply lines 30 are arranged at the four corners as described above, the discharge electrodes 1 are absorbed at these parts. The amount of ions increases, and the charge elimination ability decreases. Therefore, by arranging the discharge electrode 1 at a position other than the cross or the four corners, it is possible to maintain both the static elimination ability and the miniaturization of the device.
[0106]
From the above, the mounting position of the discharge electrode 1 is 0 °, 45 °, 90 °, 135 °, 180 °, 225 °, 270 °, 315 ° when the top of the circle of the case opening 5 is 0 °. Avoid around 10 ° around 5 ° to 40 °, 50 ° to 85 °, 95 ° to 130 °, 140 ° to 175 °, 185 ° to 220 °, 230 ° to 265 °, 275 ° to 310 °, The position is any one of 320 ° to 355 °. For example, if four electrodes are arranged, 10 ° to 35 °, 55 ° to 80 °, 100 ° to 125 °, 145 ° to 170 °, 190 ° to 215 °, 235 ° to 260 °, 280 ° to They are arranged at 305 °, 325 ° to 350 °, respectively. In the example of FIG. 18, they are arranged near 31 °, 121 °, 211 °, and 301 °.
[0107]
The power of the motor 29 for driving the fan 7 is insulated from the ground. As a result, it is possible to prevent the ions absorbed in the power supply line of the motor 29 from flowing into the ground and deteriorating the ion balance.
[0108]
Further, in this embodiment, as shown in FIG. 20, absorption of ions from motor power supply line 30 is electrically cut off by coating motor power supply line 30 with insulating material 31. An electrically insulating seal or the like can be used for the insulating material 31, and the motor power supply line 30 can be easily insulated by attaching the seal.
[0109]
[How to fix the fan unit 26]
The thickness of the fan type static eliminator is determined by the fan portion 26, the discharge electrode 1, the structure holding the discharge electrode 1, and the thickness of the case 6 of the static eliminator. Therefore, in order to reduce the thickness of the static eliminator, these parts need to be improved. As shown in FIGS. 22 and 23, the fan portion 26 is fixed by tightly attaching a step 34 on the side surface of the fan portion 26 to the case 6 with a narrow attachment plate 36.
[0110]
Conventionally, as shown in FIG. 21A, the fan portion 26 is fixed by screwing a bolt 33 into a screw hole 32 opened at four corners of the fan portion case 27. In this method, as shown in FIG. 21B, the thickness of the head (screw head) of the bolt 33 becomes a dead space, which hinders the thinning of the static eliminator.
[0111]
Therefore, in the present embodiment, as shown in FIG. 22, step portions 34 are provided on both side surfaces of the fan unit case 27 so that the screw head does not increase the thickness of the static eliminator. FIG. 22 is a cross-sectional view illustrating a method of fixing the fan unit 26 in the static eliminator according to the present embodiment. FIG. 23 is a bottom view of the fixed state of the fan unit 26 with the lower case 6B removed. The bottom views are shown respectively. In FIG. 22A, a concave portion 35 that opens on the left and right side surfaces of the fan portion 26 is provided, and the thickness of the fan portion case 27 in which the concave portion 35 is formed in the figure is reduced to form a step portion 34. The concave portion 35 has a shape extending in a groove shape on the entire side surface of the fan portion 26 and is provided by integral molding with the fan portion case 27. However, the concave portion 35 may have a configuration in which the concave portion 35 is provided only at a portion to be screwed. For example, concave portions 35 are provided at a total of four locations, two at each of the left and right sides, and are fixed by screws at each location. The step portions 34 may be provided not only on both side surfaces but also on the front and rear surfaces. When the concave portions 35 are partially provided, three or less, or five or more, can be provided. For example, if one end is locked by a hook or the like and only the other end is screwed, the step portion 34 may be provided at one position.
[0112]
The narrow attachment plate 36 is inserted into the recess 35, and the narrow attachment plate 36 is screwed with a screw. The narrow attachment plate 36 is a circular or rectangular plate provided with a screw through hole, and a washer or the like can be used. In the example of FIG. 23, the narrow attachment plate 36 is inserted into the recess 35 at two locations on each of the left and right side surfaces of the fan unit case 27, and the narrow attachment plate 36 is inserted instead of inserting screws into the fan unit case 27 itself. And fixed to the case 6 of the static eliminator with screws. Since the screw does not penetrate through the case 6, the screw head does not protrude from the surface of the case 6, which contributes to the reduction in thickness of the static eliminator.
[0113]
Further, the configuration of the step portion 34 is not limited to the configuration shown in FIG. 22A, and for example, the configurations shown in FIGS. 22B and 22C can also be used. In the configuration of FIG. 22B, a recess 35 deeper than the screw head is formed from the upper surface of the fan unit case 27, and a screw hole is opened in this portion to prevent the screw head from projecting. In the configuration shown in FIG. 22C, the side surface of the fan unit case 27 is formed in an L-shaped cross section, and the L-shaped step is made larger than the screw head to prevent the screw head from projecting. In the configurations shown in FIGS. 22B and 22C, it is not necessary to use a narrow attachment plate. Alternatively, a flat screw whose screw head does not protrude without providing a concave portion, such as a grub screw, may be used. Further, it is preferable that the step portion 34 has the same structure at the left and right or at the front and back, but the structure as shown in FIG. 22 may be appropriately combined.
[0114]
As for the discharge electrode 1 for determining the thickness of the fan type static eliminator and the structure for holding the discharge electrode 1, the discharge electrode 1 and the discharge electrode holding structure are integrated as the static eliminator detachable unit 20 as described above. The discharge electrode 1 of the static eliminator needs to be periodically cleaned or replaced because foreign matters precipitate or wear on the tip due to discharge. For this reason, in the conventional static eliminator, the individual discharge electrodes 1 are held by a holding structure such as a connector and can be detached. In addition, since it is necessary to open the case 6 of the static eliminator every time maintenance work such as replacement is performed, a hinge or a fitting structure of resin claws is used so as to be easily disassembled. However, these structures are complicated, and there has been a problem that the adoption of such a detachable structure increases the size of the static eliminator. Therefore, in the present embodiment, the members provided with the discharge electrodes 1 are unitized, and the structure for replacement is integrated into the detaching mechanism of the detaching unit 20 for the static eliminator, thereby realizing miniaturization.
[0115]
In addition, the case 6 of the static eliminator is made thinner while the center of a guard portion 25 that guards the intake side of the case opening 5 is raised as shown in FIG. FIG. 24 shows a sectional view and a perspective view of the case 6. It is known that the intake capacity of the fan 7 decreases when the position of the fan 7 and the intake port are close. When the case 6 is made thinner, when the fan 7 takes in outside air from the case opening 5, the distance between the intake port and the fan 7 becomes shorter and the intake capacity is significantly reduced. Therefore, as shown in FIG. 24, the central portion of the guard portion 25 covering the case opening 5 is raised to increase the distance between the intake port and the fan 7, thereby improving the intake capacity while maintaining the thickness of the device itself. Let me.
[0116]
Further, by raising the central portion, the strength against the stress from above is improved, and the effect of increasing the rigidity of the guard portion 25 is also obtained. Accordingly, even if the user accidentally presses the guard portion 25 with a finger or the like, it is difficult for the guard portion 25 to be deformed, and it is possible to prevent an accident such that the deformed portion comes into contact with the rotating portion of the fan 7 and interferes with it. And the rotation of the fan 7 is protected. Furthermore, even if a finger or the like is inserted through a gap between the net-shaped guard portions 25, since there is a distance from the fan 7, an accident that injures the finger can be prevented, which leads to an improvement in safety. In this way, by adopting a structure in which the center of the intake port on the back of the case 6 is raised, the intake capacity of the fan 7 can be increased, ions can be transported over a wide range, and impact resistance is also improved.
[0117]
Furthermore, the diameter of the case opening 5 on the exhaust side may be smaller than that of the fan opening 28. FIG. 25 shows the relationship between the case opening 5 and the fan opening 28 of the static eliminator according to another embodiment of the present invention. By reducing the diameter on the exhaust side, as shown in FIG. 25, the wind speed distribution from the fan 7 is expanded, and ions can be conveyed over a wider range to expand the neutralization range.
[0118]
[Bearing 37]
Further, the above embodiment has a configuration in which the amount of generated dust can be suppressed. As a dust source of the fan type static eliminator, it is considered that the main causes are wear of the discharge electrode 1 due to discharge and dust from the bearing 37 which is a movable portion of the fan 7. As a result of an evaluation test performed by the present inventors, it was found that dust generation from the bearing 37 was overwhelmingly large. Regarding the generation of dust from the bearing 37, it is considered that grease used as a lubricant becomes dust and generates dust.
[0119]
FIG. 26 is a schematic sectional view of the internal structure of the bearing 37. 26 (a) is a cross-sectional view of the bearing 37, FIG. 26 (b) is a vertical cross-sectional view taken along the line BB of FIG. 26 (a), and FIG. The longitudinal cross-sectional views along the line C are shown. As shown in these figures, the bearing 37 includes a plurality of balls 38 and a retainer (retainer) 39 for positioning and holding the balls 38, and an inner ring and an outer ring with the balls 38 interposed therebetween and each ball 38 at a point. It is relatively rotatably held while in contact. The retainer 39 holds the ball 38 from one side as shown in FIG. 26B, and the upper surface is opened in the figure. Depending on the bearing, there is a type in which a seal is attached to an opening surface or both surfaces are held by a retainer. A lubricant such as grease is applied to the surface of the ball 38 held by the retainer 39. When the bearing 37 rotates, the grease in the bearing scatters to generate dust. As a result of examining the amount of dust generated from the bearing 37, it was found that almost no dust was generated from the retainer 39 side, that is, the lower surface in FIG. This is probably because the retainer 39 separates the outside from the ball 38 coated with grease.
[0120]
Therefore, in the present embodiment, it has been found that the amount of dust generation can be reduced by combining two bearings 37 each having the retainer 39 on one surface and devising the arrangement. 27 to 29 show a state in which the bearing 37 is arranged on the rotation shaft 45 of the fan 7. FIG. 27 shows a state in which bearings 37A and 37B are arranged side by side, and both bearings 37 are oriented so that retainer 39 is located inside fan portion 26, and on the surface of fan portion 26 where bearing 37B is not provided with retainer 39. Are sealed so that the opening surface of the bearing 37 is not exposed to the outside by adhering the bearing closing portion 42. As the bearing closing portion 42, a material such as a seal made of vinyl or paper and having an adhesive applied to the sticking surface can be used. In order to check the amount of dust generated in such a configuration, in a configuration as shown in FIG. 30, the fan unit 26 is placed as a sample in a closed container 43, and the fan 7 is operated at a rated voltage. A test was performed in which the amount of generated particles having a particle size of 0.3 μm to 5 μm was measured by the particle counter 44. The measurement procedure is as follows.
[0121]
(1) With the fan unit 26 placed in the container 43, clean air is introduced into the container 43 at a rate of 0.5 l / min to remove particles in the container 43. The measurement is performed with the power of the fan 7 turned off, and it is confirmed that the amount of dust generated in the background in the container 43 is three or less.
(2) The container 43 is sealed, and the sealed container 43 and the particle counter 44 are connected as shown in FIG.
(3) The operation of the fan 7 is started at the rated voltage, and at the same time, the measurement is started by the particle counter 44.
(4) The particle counter 44 sucks 0.5 l / min of gas from the closed container 43 and counts the number of particles in the sucked gas. The sucked gas is filtered by a filter inside the particle counter 44 and returned to the container in a state of clean air containing no particles.
(5) The number of particles measured per minute is integrated and defined as the amount of dust generated per minute.
(6) This measurement is repeated 30 times, and the average value is obtained.
[0122]
As a result of measuring the amount of generated dust by changing the combination of the arrangement of the bearings 37 as described above, the results are as shown in Tables 1 and 2 below. Table 1 shows that, in FIG. 27, the amount of dust generated by changing the direction of the bearing 37A is shown in a state where the bearing 37B is arranged so that the bearing 37B is sealed on the surface side and the retainer 39 is located on the side facing the bearing 37 as shown in FIG. Was measured. In Table 1, １ indicates an example in which the bearing 37A is arranged so that the retainer 39 is located on the inner side and the open surface is located on the side facing the bearing 37 as shown in FIG. An example is shown in which the retainer 39 is disposed so as to be located on the open surface and the surface facing the bearing 37. In order to make the data of Table 1 easy to understand, Table 2 shows the distribution of the amount of generated dust of each of the bearings 37A arranged in circles and crosses. When the average of the amount of generated dust is calculated from Tables 1 and 2, it is 16.96 particles / min in the arrangement of ○, 39.70 particles / min in the arrangement of X, and about 42% by adopting the arrangement of ○. The amount of dust generated was reduced. As described above, the bearing 37A is arranged as shown in FIG. 27, that is, the open surface where the retainer 39 is not provided is the bearing 37 facing surface, and the surface where the retainer 39 is provided is the outside of the bearing 37 (the inside of the fan portion 26). With this arrangement, the amount of dust generation can be suppressed.
[0123]
[Table 1]

[0124]
[Table 2]

[0125]
On the other hand, Table 3 shows the results of measurement of the amount of dust generated by changing the direction of the bearing 37B while arranging the bearing 37A as shown in FIG. 27 and changing the direction of the bearing 37B. 27. In Table 3, an example in which the bearing 37B, the retainer 39 on the surface facing the bearing 37A, and the surface of the fan portion 26 with the open portion closed by a seal on the surface side of the fan portion 26 are indicated by x, which is opposite to FIG. In the example, the open surface is disposed on the surface facing the bearing 37, and the surface provided with the retainer 39 and the seal is disposed on the surface side of the fan portion 26. In order to make Table 3 easy to understand, Table 4 shows the distribution of the amount of dust generation of the bearings 37B for each of x and o in the same manner as described above. When the average was calculated from these results, it was 16.95 particles / min in the arrangement of x and 31.5 particles / min in the arrangement of o, and the amount of dust generation could be reduced to about 54%. From this, it has been clarified that the arrangement shown in FIG. 27, that is, the arrangement in which the retainer 39 is arranged on the surface facing the bearing 37 so that the seal is located on the surface side of the fan section 26 has the smallest amount of dust generation. These experiments are comparative tests in the configuration of the present embodiment, and are not comparison tests with the prior art. For example, in a configuration in which the open surface of the bearing 37 is on the front surface side of the fan portion 26 or a configuration in which a seal is not attached, the amount of dust generation is expected to be further increased.
[0126]
[Table 3]

[0127]
[Table 4]

[0128]
From the above, it has been found that the amount of dust generation can be effectively suppressed by arranging the bearings 37 so that the retainer 39 is located inside the fan unit 26 and closing the surface of the fan unit 26 with a seal.
[0129]
However, the present invention is not limited to this configuration. For example, a configuration in which the retainers 39 are arranged on both end surfaces as shown in FIG. 28 may be employed. Since the retainer 39 is located on the surface side of the fan section 26 and the space closed by the opposing surface of the bearing is not in contact with the outside air, even if dust is generated from grease in this portion, it is not released to the outside, and the amount of generated dust Is considered to be suppressed. In this case, it is not necessary to attach a seal.
[0130]
Further, as shown in FIG. 29, a two-piece bearing 37C in which both sides are closed by a retainer 39 and the ball 38 is interposed can be used. Preferably, a bearing 37C having a two-piece structure is used instead of the left bearing 37A in the configuration of FIG. Thus, the amount of dust generated from grease can be suppressed even in a space closed by the facing surface of the bearing, and the entire amount of generated dust can be reliably suppressed. However, a bearing 37C having a two-piece structure may be used instead of the right bearing 37B in the configuration of FIG. 27, and in this case, it is not necessary to attach a seal. Alternatively, a two-piece bearing 37C may be used for both bearings, or the fan 7 may be supported by one bearing 37C.
[0131]
【The invention's effect】
As described above, the static eliminator and the detachable unit for the static eliminator according to the present invention can safely and easily clean or replace the discharge electrode or replace the portion where the surface discharge has occurred. The reason for this is that the static eliminator and the detachable unit for the static eliminator according to the present invention can be replaced together with the unit including the discharge electrode as a unit type. According to the present invention, the detachable unit for the static eliminator can be easily replaced from the outside of the static eliminator, thereby facilitating maintenance work. Also, even if creeping discharge occurs, only the portion where creepage discharge occurs can be replaced, so that waste such as replacing and discarding the entire device as in the related art can be avoided. Further, the present invention incorporates a high-voltage power supply unit in the unit, so that a high voltage is not applied to an electrical connection portion between the unit and the static eliminator main body, so that a low-voltage contact can be used in the connector portion, which is simple and compact. It can be realized at low cost with a simple configuration. Further, according to the present invention, since not only the discharge electrode is replaced but also the support supporting the discharge electrode can be replaced, the replacement and maintenance work become extremely easy.
[0132]
Furthermore, in order to enhance the safety of the static eliminator in which a high voltage is used, the present invention provides a current detecting unit for detecting a leakage current in the holding unit, and stops discharging when a large current is detected. be able to. Also, in order to safely attach and detach the unit, and to prevent unintentional detachment, an attachment detection unit that detects the attachment state of the detachment unit for the static eliminator, a slide member for locking the slide with the unit attached, A lock detection unit for detecting that the slide member is at the lock position may be provided. As described above, the static eliminator and the detachable unit for the static eliminator according to the present invention can prevent troubles due to abnormal discharge and the like and facilitate repair when troubles occur, and realize a static eliminator and a detachable unit for the static eliminator with excellent handling. Is done.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an arrangement of electrodes in a DC type static eliminator.
FIG. 2 is a perspective view showing an example of a conventional static eliminator.
FIG. 3 is a perspective view of the attaching / detaching unit for a static eliminator according to one embodiment of the present invention, as viewed obliquely from above.
4 is a perspective view of the attaching / detaching unit for the static eliminator of FIG. 3 as viewed from obliquely below.
FIG. 5 is a perspective view showing a state in which the detachable unit for the static eliminator according to the embodiment of the present invention is mounted on the static eliminator main body.
FIG. 6 is a perspective view showing the static eliminator in which the detachable unit for the static eliminator according to one embodiment of the present invention is mounted on the static eliminator main body.
FIG. 7 is a cross-sectional view showing a desorption unit for a static eliminator according to one embodiment of the present invention.
FIG. 8 is a perspective view showing a state in which a discharge electrode of the static eliminator according to one embodiment of the present invention is covered with an insulating member.
FIG. 9 is a schematic diagram showing a state in which a discharge occurs at a portion other than the tip of the discharge electrode.
FIG. 10 is a schematic diagram showing an example in which the outer shape of a discharge electrode is formed into a curved surface.
FIG. 11 is a cross-sectional view showing a state in which a discharge electrode of the static eliminator according to one embodiment of the present invention is covered with an insulating member.
FIG. 12 is a cross-sectional view showing a state in which a discharge electrode of a static eliminator according to another embodiment of the present invention is covered with an insulating member.
FIG. 13 is a perspective view showing a connector of a static eliminator according to another embodiment of the present invention.
FIG. 14 is a schematic diagram showing a path when creeping discharge occurs in the static eliminator according to one embodiment of the present invention.
FIG. 15 is a perspective view showing a slide member in the static eliminator of FIG. 6;
FIG. 16 is a schematic diagram showing a state where the slide member switches the lock detection unit.
FIG. 17 is a circuit diagram of a static eliminator according to one embodiment of the present invention.
FIG. 18 is a plan view of the static eliminator according to one embodiment of the present invention.
FIG. 19 is a schematic diagram showing a general arrangement example of a motor power supply line and a discharge electrode.
FIG. 20 is a plan view showing a state where a motor power supply line is covered with an insulating material.
FIG. 21 is a plan view and a front view showing a conventional method of fixing a fan unit.
FIG. 22 is a cross-sectional view illustrating a method of fixing a fan unit in the static eliminator according to one embodiment of the present invention.
FIG. 23 is a bottom view showing the fixed state of the fan unit with the lower case of the static eliminator according to one embodiment of the present invention removed.
FIG. 24 is a cross-sectional view and a perspective view showing a case of the static eliminator according to one embodiment of the present invention.
FIG. 25 is a schematic sectional view showing a case opening and a fan opening of a static eliminator according to another embodiment of the present invention.
FIG. 26 is a schematic sectional view showing the internal structure of the bearing.
FIG. 27 is a schematic sectional view showing an arrangement of bearings according to one embodiment of the present invention.
FIG. 28 is a schematic sectional view showing an arrangement of bearings according to another embodiment of the present invention.
FIG. 29 is a schematic sectional view showing the arrangement of bearings according to another embodiment of the present invention.
FIG. 30 is a schematic view showing an outline of an apparatus for testing the amount of generated dust of a bearing.
[Explanation of symbols]
1 ... discharge electrode
2 High voltage power supply
2A high-voltage transformer
3 ... vent
4 ... Support
5 Case opening
6 ... Case
6A: Upper case
6B ... lower case
7 ... Fan
8 ... holding part
9 ... inner wall
10 Current detector
11 ··· Mounting detector
12 ... Sliding member
12a: Lock piece
12b: detection piece
13: Lock detector
14 Body connector
15 Unit connector
16 ... High voltage power storage unit
17 ・ ・ ・ High voltage electric wire
18 ... filler
19 ... Notch
20: Desorption unit for static eliminator
21: Static eliminator body
22 ・ ・ ・ Platter
23 ・ ・ ・ Electrode needle
24 ・ ・ ・ Electric field cutoff part
24A ・ ・ ・ circular guard
25 Guard part
25a ... guard
26: Fan unit
27 ・ ・ ・ Fan unit case
28: Fan opening
29 ・ ・ ・ Motor
30 ・ ・ ・ Motor power line
31 ... insulating material
32 ... screw hole
33 ... bolt
34 ・ ・ ・ Step
35 ... recess
36 ・ ・ ・ Narrow plate
37, 37A, 37B, 37C ... bearing
38 ・ ・ ・ Ball
39 ・ ・ ・ Retainer
40 ・ ・ ・ Inner ring
41 ・ ・ ・ Outer ring
42 ・ ・ ・ Bearing closed part
43 ・ ・ ・ Container
44 ・ ・ ・ Particle counter
45 ... Fan rotation axis
46 ... Ground electrode
47 ・ ・ ・ Insulating member
48 ... male terminal
49 ・ ・ ・ Female terminal
R: Current detection resistor

Claims (17)

Static elimination including at least one discharge electrode (1) for applying a high voltage to air to ionize and generate ions, and a high-voltage power supply (2) for supplying power to the discharge electrode (1). An apparatus, wherein the static eliminator is:
A support (4) opening a vent (3);
At least one discharge electrode (1) provided on the support (4) so as to protrude from the vent (3);
A high-voltage power supply unit (2) for supplying electric power to the discharge electrode (1);
A desorption unit (20) for a static elimination device having:
A case (6) having a case opening (5);
A holder (8) provided on the case (6) for holding the charge / discharge device detachment unit (20) when the charge / discharge device detachment unit (20) is mounted;
And a static eliminator body (21) having
When the static eliminator detachable unit (20) is mounted on the static eliminator main body (21), the ventilation opening (3) of the support (4) and the case opening (5) are configured to substantially coincide with each other. A static eliminator characterized by the above-mentioned. At least one discharge electrode (1) for generating ions by applying a high voltage to air to generate ions, and a high-voltage power supply (2) for supplying power to the discharge electrodes (1). A fan (7) for flying ions, the static eliminator comprising:
A support (4) opening a vent (3);
At least one discharge electrode (1) provided on the support (4) so as to protrude from the vent (3);
A high-voltage power supply unit (2) for supplying electric power to the discharge electrode (1);
A desorption unit (20) for a static elimination device having:
A case (6) having a case opening (5);
A fan (7) provided in the case opening (5);
A holder (8) provided on the case (6) for holding the charge / discharge device detachment unit (20) when the charge / discharge device detachment unit (20) is mounted;
And a static eliminator body (21) having
When the static eliminator detachable unit (20) is mounted on the static eliminator main body (21), the ventilation opening (3) of the support (4) and the case opening (5) are configured to substantially coincide with each other. A static eliminator characterized by the above-mentioned. 3. The static eliminator according to claim 1, wherein the detachable unit for a static eliminator has a substantially cylindrical inner wall provided with a discharge electrode on an inner surface. 4. The detachable unit (20) for a static eliminator, wherein a portion to which a high voltage is applied is covered with an insulating member, except for an electrode tip of the discharge electrode (1). The static eliminator according to any one of the above. The static eliminator body (21) is provided with a conductor in the holding portion (8), and a current detector () capable of detecting a leak current flowing from the static eliminator detachable unit (20) to the outside of the conductor. The static eliminator according to any one of claims 1 to 4, further comprising (10). The discharge device according to claim 5, wherein the current detection unit (10) is configured to stop the discharge when detecting that a leakage current of a predetermined value or more has flowed into the holding unit (8). Static eliminator. The static eliminator main body (21) is provided with a mounting detector (11) for detecting a mounting state of the static eliminator detachable unit (20), and the static eliminator detachable unit (20) is connected to the static eliminator main body (21). The mounting detector (11) of the static eliminator is switched ON when the static eliminator is attached to the main body, and is switched OFF when the detachable unit for static eliminator (20) is separated from the static eliminator main body (21). The static eliminator according to claim 1, wherein: A slide member (12) for locking a slide with the static eliminator detachable unit (20) mounted on the static eliminator body (21), and a lock for detecting that the slide member (12) is in the lock position. The static eliminator according to any one of claims 1 to 7, further comprising a detection unit (13). The static eliminator main body (21) further includes a main body connector for sending a control signal for controlling discharge of the discharge electrode 1 provided in the static eliminator detachable unit (20) to the static eliminator detachable unit (20). (14)
The removal unit for a static eliminator (20) includes a unit connector (15) provided on the support (4) for electrically receiving a control signal,
It is characterized in that the unit connector (15) and the main body connector (14) come into contact and are electrically connected when the detachable unit (20) for the static eliminator is attached to the static eliminator main body (21). The static eliminator according to any one of claims 1 to 8. The unit connector (15) of the removal unit (20) for a static eliminator is a contact plate, the body connector (14) of the static eliminator main body (21) is a spring connector, and these contact portions are spring contacts. The static eliminator according to claim 9. The attachment / detachment of the charge / discharge unit for removal unit (20) and the charge removal unit main body (21) is slide-type insertion / removal, and the insertion direction of the charge / discharge unit removal unit (20) to the charge removal unit body (21); The static eliminator according to claim 10, wherein a direction in which the spring connector of the main body connector is compressed coincides with a direction in which the spring connector is compressed. At least one discharge electrode (1) for applying a high voltage to air to cause ionization and generate ions, and a high-voltage power supply (2) for supplying power to the discharge electrode (1) are ionized. A desorption unit (20) for a static elimination device detachable from a main unit (21) including a fan (7) for flying ions, wherein the desorption unit for a static elimination device (20) comprises:
A support (4) opening a vent (3);
At least one discharge electrode (1) provided on the support (4) so as to protrude from the vent (3);
A high-voltage power supply unit (2) for supplying electric power to the discharge electrode (1);
Has,
The case provided in the vent (3) of the support (4) and the case (6) of the static eliminator main body (21) when the detachable unit (20) for the static eliminator is mounted on the static eliminator main body (21). A detachable unit for a static eliminator, wherein the detachable unit is configured to substantially coincide with the opening (5). 13. The detachable unit for a static eliminator according to claim 12, wherein the detachable unit for a static eliminator further has a substantially cylindrical inner wall provided with a discharge electrode on an inner surface thereof. The detachable unit for a static eliminator according to claim 12 or 13, wherein a portion to which a high voltage is applied is covered with an insulating member except for an electrode tip of the discharge electrode (1). The static elimination unit detachment unit (20) further includes a control signal for controlling discharge of a discharge electrode (1) provided in the static elimination device detachment unit (20), which is sent from the static elimination device main body (21). A unit connector (15) provided on the support (4) for electrically receiving;
When the static eliminator detachable unit (20) is mounted on the static eliminator main body (21), the main unit connector (14) provided on the static eliminator main body (21) comes into contact with the unit connector (15) to be electrically joined. The desorption unit for a static eliminator according to any one of claims 12 to 14, wherein the desorption unit is configured to perform the following. The unit connector (15) of the removal unit (20) for a static eliminator is a contact plate, the body connector (14) of the static eliminator main body (21) is a spring connector, and these contact portions are spring contacts. The removal unit for a static eliminator according to claim 15. The attachment / detachment of the charge / discharge unit for removal unit (20) and the charge removal unit main body (21) is slide-type insertion / removal, and the insertion direction of the charge / discharge unit removal unit (20) to the charge removal unit body (21); The detachable unit for a static eliminator according to claim 16, wherein a direction in which the body connector (14) compresses the spring connector coincides with a direction in which the spring connector is compressed.

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