JP2016054025A - Static eliminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a static eliminator capable of reducing the size of a head part while preventing deterioration of an electrode holder.SOLUTION: A static eliminator 10 includes: a connection cable 12 including a high voltage cable 15 extending therein; a head part 13 provided to the front end of the connection cable 12. The head part 13 includes: a discharge electrode 23 which is electrically connected to the high voltage cable 15: an insulate electrode holder 22 which encloses the circumference of the discharge electrode 23 to hold the discharge electrode 23; and a counter electrode which is disposed on the circumference of the electrode holder 22. The electrode holder 22 is formed of a fluororesin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a static eliminator that removes static electricity.

  Conventionally, as disclosed in Patent Document 1, for example, there is a type of static eliminator that supplies ions in a spot manner to a static elimination object. In this type of static eliminator, a connection cable having a high voltage cable inserted therein is extended from the main body controller, and a small head portion for generating ions is provided at the tip of the connection cable. The head portion is disposed on the outer circumference of the electrode-shaped discharge electrode electrically connected to the high-voltage cable, the electrode holder surrounding the outer circumference of the discharge electrode and having an insulating property for holding the discharge electrode. And a cylindrical counter electrode (ground electrode). And a corona discharge arises by applying a high voltage to a discharge electrode, and the ion produced | generated by it is supplied to a static elimination object, and static elimination is performed.

JP-A-2005-203291

  By the way, the electrode holder of the head part is formed of an insulator so as to achieve electrical insulation between the discharge electrode and the counter electrode. Is forming. As a result, the electrode holder can be made smaller, and the interval between the discharge electrode and the counter electrode can be made narrower, and the head portion can be made smaller. However, since ceramic is a substance having a high relative dielectric constant, when a high voltage is applied to the discharge electrode, dielectric polarization occurs in the electrode holder and the electric field increases. As a result, there is a problem that electric discharge is generated between the electrode holder and the counter electrode and the electrode holder is deteriorated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a static eliminator capable of reducing the size of a head portion while suppressing deterioration of an electrode holder.

  A static eliminator that solves the above problems includes a connection cable having a high-voltage cable inserted therein, and a head portion provided at a tip portion of the connection cable, the head portion being electrically connected to the high-voltage cable. A discharge electrode connected to the electrode, an insulating electrode holder surrounding the discharge electrode and holding the discharge electrode, a counter electrode disposed on the outer periphery of the electrode holder, the counter electrode and the discharge An insulating pipe that surrounds and holds the connection portion between the discharge electrode and the high-voltage cable, and the high voltage that is led out from the tip of the connection cable and inserted into the head portion A holding member for holding the leading end portion of the cable, and ions are generated by corona discharge generated by applying a high voltage to the discharge electrode via the high voltage cable. A neutralization device for the electrode holder is formed by fluorine resin.

  According to this configuration, the electrode holder that achieves electrical insulation between the discharge electrode and the counter electrode is formed of the fluororesin. Since the relative permittivity of the fluororesin is relatively low, the occurrence of discharge between the electrode holder and the counter electrode is suppressed, and deterioration of the electrode holder is suppressed. Furthermore, since the fluororesin has high heat resistance, even if the electrode holder is made small and the interval between the discharge electrode and the counter electrode is narrowed, the dielectric breakdown of the electrode holder hardly occurs. Thus, by using a fluororesin for the electrode holder, it is possible to reduce the size of the head portion while suppressing deterioration of the electrode holder.

  In the static eliminator, the electrode holder is integrally formed with a surrounding portion interposed between the insulating pipe and the counter electrode and surrounding a portion corresponding to the connection portion on the outer periphery of the insulating pipe. It is preferable.

  According to this configuration, since the outer periphery of the connection portion between the discharge electrode and the high voltage cable, which is likely to cause dielectric breakdown, is surrounded by the insulating pipe and the surrounding portion of the electrode holder made of fluororesin, the insulating pipe and the electrode holder are insulated. The occurrence of dielectric breakdown in the portion is further suppressed, and as a result, the head portion can be further reduced in size. Moreover, since the surrounding part of an electrode holder is interposed between an insulation pipe and a counter electrode, generation | occurrence | production of the discharge between an insulation pipe and a counter electrode can be suppressed.

In the static eliminator, the holding member is preferably made of a fluororesin.
According to this configuration, since the holding member that holds the high-voltage cable is formed of a fluororesin, it is possible to suppress the dielectric breakdown of the holding member, thereby contributing to further downsizing of the head portion. it can.

  In the static eliminator, the holding member has a cylindrical shape that surrounds the outer periphery of the leading end lead-out portion of the high-voltage cable, and the leading end portion of the holding member is located on the inner peripheral side of the surrounding portion of the electrode holder. It is preferable.

  According to this configuration, at least one of the leading end leading portion of the high voltage cable inserted into the head portion, the connecting portion between the leading end leading portion and the discharge electrode, and the electrode holder and the holding member made of the fluororesin. Since it is surrounded, the dielectric breakdown of the insulating part between the discharge electrode and the counter electrode can be further suppressed.

  In the static eliminator, the electrode holder is formed with an air discharge hole that discharges compressed air that is supplied to the head portion and passes through an air supply passage in the head portion, and discharges the discharge ion from the air discharge hole. It is preferable to be configured so as to be able to be supplied to the static elimination object on the compressed air.

According to this configuration, it is possible to efficiently supply the static elimination ions generated in the head unit to the static elimination object.
In the static eliminator, the electrode holder has a cylindrical peripheral wall that surrounds the outer periphery of the discharge electrode, and the static ion generated in an ion generation chamber configured on the inner peripheral side of the peripheral wall is the Preferably, the air discharge hole of the electrode holder is formed at a position on the outer peripheral side of the ion discharge port.

  According to this configuration, since the air discharge hole for discharging the compressed air for carrying the discharge ion discharged from the ion discharge port at the tip of the peripheral wall portion is formed on the outer peripheral side of the ion discharge port, It becomes possible to supply efficiently by the static elimination object.

In the static eliminator, a communication hole that connects the air supply passage and the ion generation chamber is preferably formed in the peripheral wall portion.
According to this configuration, since the ion generation chamber has a positive pressure due to the communication hole formed in the peripheral wall portion of the electrode holder, it is possible to suppress outside air from entering the ion generation chamber from the discharge port of the peripheral wall portion. As a result, it is possible to suppress dust and the like contained in the outside air from adhering to the ion generation chamber and the discharge electrode.

  According to the static eliminator of the present invention, it is possible to reduce the size of the head portion while suppressing deterioration of the electrode holder.

(A) (b) It is sectional drawing of the head part vicinity in the static elimination apparatus of embodiment.

Hereinafter, an embodiment of the static eliminator will be described.
As shown in FIG. 1A, the static eliminator 10 includes a main body controller 11, a flexible connection cable 12 extending from the main body controller 11, and a head portion 13 attached to the tip of the connection cable 12. In addition, it is configured as a spot type static eliminator that supplies static elimination ions from the head unit 13 on compressed air in a spot manner.

  The main body controller 11 includes a power generation unit that generates an alternating high voltage of, for example, several kV for generating ions by corona discharge, and an air supply unit that adjusts the flow rate of compressed air supplied from the outside.

  An external circular flexible connection cable 12 extending from the main body controller 11 includes a high voltage cable 15 for supplying an alternating high voltage to the head portion 13 and compressed air to the head portion 13 in a resin jacket 14 covering the outside. The air tube 16 to be supplied is inserted in parallel. That is, although the high voltage cable 15 and the air tube 16 are separate bodies, both are inserted into the resin jacket 14 to constitute a single connection cable 12.

  The high-voltage cable 15 includes a core wire 15a, an insulating portion 15b that covers the outer periphery of the core wire 15a and insulates from an AC high voltage of several kV applied to the core wire 15a, and a shield portion 15c that includes a metal net that covers the outer periphery of the insulating portion It is configured. The core wire 15a is made of a copper wire, and the insulating portion 15b is made of a silicon-based or fluorine-based resin. The shield portion 15 c shields the discharge due to the alternating high voltage flowing through the core wire 15 a from occurring outside the high voltage cable 15. The air tube 16 is mainly formed of a urethane resin that can withstand the pressure of compressed air. The resin jacket 14 covering the high voltage cable 15 and the air tube 16 is formed of urethane resin.

  A cylindrical connection member 17 for connecting to the head portion 13 is attached to the tip of the connection cable 12. The high voltage cable 15 and the air tube 16 are led out from the opening of the connecting member 17, and the other opening is sealed with a resinous sealant 18. In the sealing agent 18, a part of the compressed air supplied to the head portion 13 connected to the connection cable 12 (the connection member 17) enters the resin jacket 14 of the connection cable 12 from the opening of the connection member 17 ( Backflow). In addition, the shield part 15c of the high voltage cable 15 is beaten by the front part of the sealant 18.

[Configuration of head]
A head portion 13 having an outer circular shape having the same diameter and the same diameter as that of the connection cable 12 is integrally attached to the distal end portion of the connection cable 12.

  The head portion 13 includes a cylindrical counter electrode 21 attached to the connecting member 17 at the tip of the connection cable 12, an electrode holder 22 attached to the tip of the counter electrode 21, and a needle shape held by the electrode holder 22. The discharge electrode 23 and the counter electrode 21 and the electrode holder 22 constitute an outer shell portion of the head portion 13. The head unit 13 includes a cylindrical holding block 24 (holding member) disposed inside the counter electrode 21 and a cylindrical insulating pipe 25 held by the holding block 24.

  The counter electrode 21 constituting the outer shell of the head portion 13 is made of stainless steel, and is screwed and fixed to a screw portion 17 a formed on the outer periphery of the distal end of the connecting member 17 at the axial base end portion of the counter electrode 21. A landing portion 21a is formed. The connecting member 17 is in contact with a ground wire (not shown) wired in the connection cable 12 (resin jacket 14), and the counter electrode 21 in contact with the connecting member 17 is also at ground potential.

  The holding block 24 includes a clamped portion 24a that is clamped in the axial direction by a stepped portion 21b formed at a position slightly on the distal end side of the screwed portion 21a and the distal end portion of the connecting member 17 in the counter electrode 21, and a clamped portion And a guide portion 24b extending from 24a to the distal end side of the counter electrode 21. The holding block 24 is a member formed of a fluororesin such as PTFE (polytetrafluoroethylene) as a whole, and is formed by cutting in this embodiment.

  The guide portion 24b of the holding block 24 has a cylindrical shape that is coaxial with the connection cable 12 and has a smaller diameter than the sandwiched portion 24a, and is led into the head portion 13 from the opening (sealing agent) of the connecting member 17. Further, the leading end lead portion 15d of the high voltage cable is held while being guided to the center of the diameter of the head portion 13. The high voltage cable 15 has a configuration in which the shield portion 15c is peeled off at the leading end lead portion 15d and the core wire 15a is covered with the insulating portion 15b. Further, the guide portion 24b is formed with a through hole 24c penetrating in the radial direction so as to communicate with the inside and outside of the guide portion 24b.

  As shown in FIG. 1 (b), the electrode holder 22 attached to the tip of the counter electrode 21 (the end opposite to the screwed portion 21a) is made of PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether) as a whole. (Copolymer) or the like, and is formed by injection molding in this embodiment.

  The electrode holder 22 has a cylindrical outer peripheral portion 31 (enclosed portion) inserted into the opening 21 c at the tip of the counter electrode 21. The outer peripheral portion 31 is coaxial with the counter electrode 21, and a part of the outer peripheral surface of the outer peripheral portion 31 is in contact with the inner peripheral surface of the counter electrode 21 in the radial direction. An annular seal member S is interposed between the outer peripheral surface of the outer peripheral portion 31 and the inner peripheral surface of the counter electrode 21, and air leakage from the space is suppressed.

  The tip of the outer peripheral portion 31 protrudes from the opening 21c to the outside of the counter electrode 21, and a positioning portion 31a that protrudes to the outer peripheral side is formed at the protruding portion. When the electrode holder 22 is assembled to the tip of the counter electrode 21, the outer peripheral portion 31 is inserted into the counter electrode 21 until the positioning portion 31 a comes into contact with the tip of the counter electrode 21.

  An electrode holding portion 32 having a bottomed cylindrical shape is formed on the inner peripheral side of the outer peripheral portion 31 at the distal end portion of the electrode holder 22. The electrode holding portion 32 is formed so as to be recessed in the axially inner side (base end side) at the diameter center portion of the distal end surface of the electrode holder 22, and the peripheral wall portion 32 a of the electrode holding portion 32 forms a gap with the inner peripheral surface of the outer peripheral portion 31. Via the radial direction.

  Further, the peripheral wall portion 32 a and the outer peripheral portion 31 of the electrode holding portion 32 are connected to each other at the tip connecting portion 33 at the tip of the electrode holder 22. The tip connecting portion 33 has an annular shape centered on the axis of the electrode holder 22, and the tip connecting portion 33 has a plurality of air discharge holes 33 a penetrating along the axial direction of the electrode holder 22 along the circumferential direction. Is formed. In addition, a communication hole 32 b is formed in the peripheral wall portion 32 a of the electrode holding portion 32 to communicate the space on the inner peripheral side of the peripheral wall portion 32 a and the space between the peripheral wall portion 32 a and the outer peripheral portion 31.

  A holding hole 32 c penetrating in the axial direction of the electrode holder 22 is formed in the bottom portion of the electrode holding portion 32 (the end portion of the electrode holding portion 32 opposite to the tip connecting portion 33). The needle-like discharge electrode 23 is inserted into the holding hole 32c, and the central portion in the axial direction of the discharge electrode 23 is held by the holding hole 32c. The distal end portion of the discharge electrode 23 is surrounded by the peripheral wall portion 32 a of the electrode holding portion 32, and the proximal end portion of the discharge electrode 23 protrudes from the holding hole 32 c to the inside of the head portion 13.

  Note that an ion generation chamber G is formed on the inner peripheral side of the peripheral wall portion 32 a surrounding the tip portion of the discharge electrode 23, and static elimination ions generated in the ion generation chamber G by applying a high voltage to the discharge electrode 23. Is discharged from the ion discharge port 32d at the tip of the peripheral wall portion 32a.

  A cylindrical insulating pipe 25 inserted and held in the guide portion 24 b of the holding block 24 is disposed on the base end side of the electrode holding portion 32. The insulating pipe 25 is made of a fluororesin such as PTFE (polytetrafluoroethylene). The electrode holder 22, the insulating pipe 25, and the holding block 24 are coaxially arranged, and a part of the bottom of the electrode holding portion 32 (a portion including the holding hole 32 c) is inserted into the insulating pipe 25. Further, the outer diameter of the insulating pipe 25 is set substantially equal to the outer diameter of the peripheral wall portion 32 a of the electrode holding portion 32.

  A base end portion of the discharge electrode 23 is inserted into the insulating pipe 25 from the distal end side, while a distal end portion of the high voltage cable 15 is inserted and held from the proximal end side. The insulating pipe 25 covers the outer periphery of the connecting portion 34 that electrically connects the core wire 15 a protruding from the tip of the high voltage cable 15 and the discharge electrode 23, and holds the connecting portion 34.

  The connection portion 34 is a terminal member 35 (connection terminal portion) mounted on the core wire 15 a protruding from the distal end of the high voltage cable 15 and a coil spring-like shape fixed to the base end portion of the discharge electrode 23 and contacting the terminal member 35. It consists of a contactor 36. The terminal member 35 is configured to be positioned substantially at the center in the axial direction (longitudinal direction) of the insulating pipe 25. The coil spring-like contact 36 is pre-assembled together with the discharge electrode 23 on the electrode holder 22 side when the electrode holder 22 is mounted, and the contact 36 elastically contacts the terminal member 35 when the electrode holder 22 is mounted. It is supposed to be.

Next, the positional relationship among the electrode holder 22, the holding block 24, the insulating pipe 25, and the connecting portion 34 will be described in detail.
A part of the outer peripheral portion 31 of the electrode holder 22 and the distal end portion 24 d of the guide portion 24 b of the holding block 24 are located on the outer periphery of the insulating pipe 25. That is, a part of the outer peripheral portion 31 and the distal end portion 24 d of the guide portion 24 b are interposed between the insulating pipe 25 and the counter electrode 21.

  The guide portion 24b of the holding block 24 surrounds the outer periphery on the base end side (connecting member 17 side) with respect to the axial center of the insulating pipe 25, and is opposite to the distal end portion 24d of the guide portion 24b (opposed to the sandwiched portion 24a). Side end) is located on the head base end side with respect to the terminal member 35 in the insulating pipe 25.

  The outer peripheral portion 31 of the electrode holder 22 is configured such that the base end portion 31b (the end portion on the connecting member 17 side) is positioned closer to the head base end side than the terminal member 35 in the insulating pipe 25. A portion protruding from the guide portion 24b and the outer peripheral portion 31 are opposed to each other in the radial direction via a gap. Further, the base end portion 31b of the outer peripheral portion 31 surrounds the outer periphery of the front end portion 24d of the guide portion 24b, and the base end portion 31b of the outer peripheral portion 31 and the front end portion 24d of the guide portion 24b are in the radial direction via a gap. Opposite to.

  That is, only the outer peripheral portion 31 of the electrode holder 22 is interposed between the radial direction between the insulating pipe 25 and the counter electrode 21 at a portion from the intermediate portion in the axial direction of the insulating pipe 25 to the tip portion. In addition, at the base end portion of the insulating pipe 25, only the guide portion 24 b is interposed between the insulating pipe 25 and the counter electrode 21 in the radial direction. At the intermediate position in the axial direction of the insulating pipe 25 and closer to the head base end than the terminal member 35, both the outer peripheral portion 31 and the guide portion 24b are interposed between the insulating pipe 25 and the counter electrode 21 in the radial direction. It has come to be.

  In the head portion 13 configured as described above, the air supply passage P including the through hole 24c of the holding block 24 is provided with a high voltage application portion (discharge electrode) in the insulating pipe 25 and the electrode holding portion 32 of the electrode holder 22. 23 and the connecting portion 34). Specifically, the air supply passage P is formed between the radial direction between the guide portion 24b and the counter electrode 21, between the distal end of the guide portion 24b and the outer peripheral portion 31 of the electrode holder 22, and between the insulating pipe 25 and the outer peripheral portion 31. Of the electrode holding portion 32 and between the outer peripheral portion 31 and the peripheral wall portion 32a. The air supply passage P communicates with the air discharge hole 33 a formed in the electrode holder 22 and the communication hole 32 b formed in the electrode holding portion 32.

Next, the operation of this embodiment will be described.
When an alternating high voltage is supplied from the core wire 15a of the high voltage cable 15 to the discharge electrode 23 via the terminal member 35 and the contact 36, ions are generated around the tip of the discharge electrode 23 in relation to the counter electrode 21. A corona discharge is generated in the chamber G to generate static elimination ions, and the static elimination ions are released from the ion emission port 32d of the ion generation chamber G (the tip of the peripheral wall portion 32a). Then, in conjunction with the corona discharge at the discharge electrode 23, the compressed air is supplied to the air supply passage P in the head portion 13, and the static elimination ions discharged from the ion discharge port 32d are mainly discharged from the air discharge hole 33a. The compressed air is supplied to the object to be neutralized. At this time, because the communication hole 32b formed in the peripheral wall portion 32a of the electrode holding portion 32 also has a positive pressure on the inner peripheral side of the peripheral wall portion 32a, outside air containing dust enters the inner peripheral side of the peripheral wall portion 32a. As a result, adhesion of dust to the discharge electrode 23 is suppressed.

Next, characteristic effects of the present embodiment will be described.
(1) An electrode holder 22 that holds the discharge electrode 23 and that provides electrical insulation between the discharge electrode 23 and the counter electrode 21 is formed of a fluororesin (in this embodiment, PFA). Since the relative permittivity of fluororesin is relatively low (relative permittivity of PFA is 2.1), discharge between, for example, the outer peripheral portion 31 of the electrode holder 22 and the counter electrode 21 when a high voltage is applied to the discharge electrode 23. As a result, deterioration of the electrode holder 22 is suppressed. Furthermore, since the fluororesin has high heat resistance, even if the electrode holder 22 (outer peripheral portion 31) has a small diameter and the radial distance between the discharge electrode 23 and the counter electrode 21 is narrowed, dielectric breakdown of the electrode holder 22 hardly occurs. Thus, by using a fluororesin for the electrode holder 22, it is possible to reduce the size of the head unit 13 while suppressing deterioration of the electrode holder 22. Further, by adopting PFA that can be injection-molded among fluororesins in the electrode holder 22 as in this embodiment, the electrode holder 22 is formed in a complicated shape at low cost by injection molding (for example, the electrode holder 32 It is possible to form the communication hole 32b in the peripheral wall portion 32a).

  (2) The electrode holder 22 is integrally formed with an outer peripheral portion 31 (enclosing portion) that is interposed between the insulating pipe 25 and the counter electrode 21 and surrounds a portion corresponding to the connecting portion 34 on the outer periphery of the insulating pipe 25. Is done. Thereby, since the outer periphery of the connection part 34 between the discharge electrode 23 and the high voltage cable 15 is surrounded by the insulating pipe 25 and the outer peripheral part 31 of the electrode holder 22, both of which are made of fluororesin, the insulating pipe 25 and the electrode holder 22. It is possible to further suppress the occurrence of dielectric breakdown in the insulating portion, and as a result, it is possible to contribute to further downsizing of the head portion 13. In addition, since the outer peripheral portion 31 of the electrode holder 22 is interposed between the insulating pipe 25 and the counter electrode 21, the occurrence of discharge between the insulating pipe 25 and the counter electrode 21 can be suppressed.

  (3) The head portion 13 includes a holding block 24 (holding member) that holds the leading end leading portion 15d of the high voltage cable 15 that is led out from the leading end portion of the connection cable 12 and inserted into the head portion 13. Reference numeral 24 denotes a fluororesin (in this embodiment, PTFE having a relative dielectric constant of 2.1). As a result, similarly to the case where a fluororesin is used for the electrode holder 22, the occurrence of discharge between the holding block 24 and the counter electrode 21 is suppressed, and the deterioration of the holding block 24 is suppressed. Even if the holding block 24 is downsized due to its high heat resistance, the occurrence of dielectric breakdown is suppressed, and as a result, it is possible to contribute to further downsizing of the head portion 13.

  (4) The holding block 24 has a cylindrical shape surrounding the outer periphery of the leading end lead portion 15 d of the high voltage cable 15, and the leading end portion of the holding block 24 (tip portion 24 d of the guide portion 24 b) is the outer peripheral portion 31 of the electrode holder 22. It is located in the inner peripheral side of the base end part 31b. According to this configuration, since the entire high voltage application portion from the leading end lead portion 15d of the high voltage cable 15 to the discharge electrode 23 is surrounded by at least one of the electrode holder 22 and the holding block 24 made of fluororesin, The dielectric breakdown of the insulating part between the electrode 23 and the counter electrode 21 can be further suppressed.

  (5) The electrode holder 22 is formed with an air discharge hole 33a for discharging the compressed air supplied to the head unit 13, and the charge-removing ions are put on the compressed air discharged from the air discharge hole 33a and supplied to the charge removal object. Configured to be possible. Thereby, it becomes possible to efficiently supply the static elimination ions generated by the head unit 13 to the static elimination object.

  (6) The electrode holder 22 has a cylindrical peripheral wall portion 32a that surrounds the outer periphery of the discharge electrode 23, and discharge ions generated in the ion generation chamber G configured on the inner peripheral side of the peripheral wall portion 32a. It is comprised so that it may discharge | release from the ion discharge port 32d at the front-end | tip of the surrounding wall part 32a. And since the air discharge hole 33a which discharge | releases compressed air is formed in the position of the outer peripheral side of the ion discharge port 32d, it becomes possible to supply a static elimination ion efficiently with a static elimination object.

  (7) A communication hole 32b that connects the air supply passage P and the ion generation chamber G is formed in the peripheral wall portion 32a. Thereby, since the inside of the ion generation chamber G becomes a positive pressure by the communication hole 32b formed in the peripheral wall portion 32a of the electrode holder 22, it is possible to suppress the outside air from entering the ion generation chamber G from the ion discharge port 32d of the peripheral wall portion 32a. can do. As a result, it is possible to suppress dust and the like contained in the outside air from adhering to the inside of the ion generation chamber G and the discharge electrode 23.

  (8) The discharge port of each air discharge hole 33a of the electrode holder 22 is located closer to the head tip side than the discharge electrode 23 tip. Thereby, the static elimination ions formed in the vicinity of the tip portion of the electrode holder 22 can be more efficiently supplied to the static elimination object by being put on the compressed air released from the air emission hole 33a.

  (9) Since the three parts of the electrode holder 22, the holding block 24 and the insulating pipe 25 constituting the head portion 13 are all made of fluororesin, it is possible to further suppress the occurrence of discharge with the counter electrode 21. Moreover, it can contribute to cost saving compared with the case where ceramic is used.

In addition, you may change the said embodiment as follows.
The type of fluororesin used for the electrode holder 22, the holding block 24, and the insulating pipe 25 is not limited to that of the above embodiment, and may be appropriately changed according to the configuration, but between the counter electrode 21 In view of suppressing the discharge, it is preferable to use a fluororesin having a relative dielectric constant of 2.1 or less, such as PFA or PTFE, as in the above embodiment.

  In the above embodiment, the electrode holder 22, the holding block 24, and the insulating pipe 25 are configured separately, but the insulating pipe 25 is integrally formed with the same material as at least one of the electrode holder 22 and the holding block 24. Thus, the configuration of the head unit 13 can be simplified.

In the above embodiment, the holding block 24 is made of fluororesin, but other than this, for example, it may be made of ceramic or the like.
In the above embodiment, the covering portion (insulating pipe 25) that covers the connecting portion 34 between the discharge electrode 23 and the high-voltage cable 15 in the insulating portion between the discharge electrode 23 and the counter electrode 21 is made of fluororesin. However, the present invention is not limited to this, and may be made of, for example, ceramic having excellent heat resistance. Since the insulating pipe 25 covers the connection portion 34 between the discharge electrode 23 and the high voltage cable 15, particularly dielectric breakdown occurs in the portion constituting the insulating portion between the discharge electrode 23 and the counter electrode 21. Cheap. By forming only the insulating pipe 25 from ceramic, it is possible to further suppress the dielectric breakdown of the insulating portion including the electrode holder 22 between the discharge electrode 23 and the counter electrode 21. This can contribute to further miniaturization.

The configurations such as the shapes of the electrode holder 22 and the holding block 24 are not limited to the above-described embodiment, and may be appropriately changed according to the configurations.
The main body controller 11 has a function of adjusting the generation of high voltage and the flow rate of air, but the function provided is not limited to this.

  DESCRIPTION OF SYMBOLS 10 ... Static elimination apparatus, 12 ... Connection cable, 13 ... Head part, 15 ... High voltage cable, 15d ... Lead-out | leading-out part, 21 ... Counter electrode, 22 ... Electrode holder, 23 ... Discharge electrode, 24 ... Holding block (holding member) 25 ... Insulating pipe, 31 ... Outer peripheral part (enclosed part), 32 ... Electrode holding part, 32a ... Peripheral wall part, 32b ... Communication hole, 32d ... Ion release port, 33a ... Air release hole, 34 ... Connection part, G ... Ion generation chamber, P: air supply passage.

Claims (7)

A connection cable having a high-voltage cable inserted therein, and a head portion provided at the tip of the connection cable;
The head portion is
A discharge electrode electrically connected to the high voltage cable;
An electrode holder having an insulating property surrounding the outer periphery of the discharge electrode and holding the discharge electrode;
A counter electrode disposed on the outer periphery of the electrode holder;
An insulating pipe disposed between the counter electrode and the discharge electrode and surrounding and holding a connection between the discharge electrode and the high voltage cable;
A holding member for holding the leading end portion of the high voltage cable that is led out from the leading end portion of the connection cable and inserted into the head portion, and applies a high voltage to the discharge electrode via the high voltage cable. A static elimination device that generates static elimination ions by corona discharge generated in
The static eliminator characterized in that the electrode holder is made of a fluororesin. The static eliminator according to claim 1,
The electrode holder is integrally formed with a surrounding portion that is interposed between the insulating pipe and the counter electrode and surrounds a portion corresponding to the connecting portion on the outer periphery of the insulating pipe. Static eliminator. The static eliminator according to claim 1 or 2,
The static eliminator characterized in that the holding member is made of a fluororesin. The static eliminator according to claim 3, which is dependent on claim 2,
The holding member has a cylindrical shape surrounding an outer periphery of the leading end lead-out portion of the high-voltage cable,
The static eliminator according to claim 1, wherein a tip portion of the holding member is located on an inner peripheral side of the surrounding portion of the electrode holder. In the static elimination apparatus of any one of Claims 1-4,
The electrode holder is formed with an air discharge hole that discharges compressed air that is supplied to the head portion and passes through an air supply passage in the head portion, and the charge removal ions are placed on the compressed air discharged from the air discharge hole. The static eliminator is configured to be supplied to the static elimination object. In the static elimination apparatus of Claim 5,
The electrode holder has a cylindrical peripheral wall portion that surrounds the outer periphery of the discharge electrode, and the charge removal ions generated in an ion generation chamber configured on the inner peripheral side of the peripheral wall portion are ionized at the tip of the peripheral wall portion. Configured to discharge from the outlet,
The air discharge hole of the electrode holder is formed at a position on the outer peripheral side of the ion discharge port. The static eliminator according to claim 6,
The neutralizing device is characterized in that a communication hole is formed in the peripheral wall portion to communicate the air supply passage and the ion generation chamber.