JP4498379B2 - Decharged electrode structure - Google Patents

Description

  The present invention relates to a rod-shaped decharging electrode structure which discharges or charges an object by discharging between a large number of discharge needles and ground electrodes.

  The present applicant, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-35686) and Patent Document 2 (Japanese Patent Laid-Open No. 2005-347117), carries ions generated by discharge to a long distance by air jetting. In addition, a rod-shaped decharging electrode structure of the air injection type has already been proposed.

  In the structure of Patent Document 1, a large number of discharge needles are implanted on a long and narrow printed circuit board at a predetermined interval, and this printed circuit board is embedded in a resin in an insulating holder, and a part of the discharge needle protrudes from the resin surface. In addition, pipe-like ground electrodes provided with a large number of air injection holes are arranged on both sides of the row of discharge needles.

  In the structure of Patent Document 2, a needle support inner cylinder that is supplied with air from outside is installed in an outer cylinder serving as a ground electrode in which slits are formed, and a number of discharge needles are slit in the needle support inner cylinder. The air injection hole is provided between the discharge needle and the discharge needle.

However, according to the structure of Patent Document 1, since a large number of discharge needles are implanted on the printed board, a through hole for fitting each discharge needle to the printed board and a conduction pattern for connecting the discharge needles to each other. In addition, a high level of technology is required for implanting the discharge needle, and a printed circuit board is used and the resin is embedded in the resin, resulting in high costs.
Further, since the pipe-shaped ground electrodes are arranged on both sides of the discharge needle row, the entire width is increased.

According to the structure of Patent Document 2, a cylindrical needle support inner cylinder is provided with a through small hole that passes through each discharge needle and a fixed small hole that fixes the base end of each discharge needle at opposing positions. Since the discharge needles must be fitted in both the small holes, a precision technique is required to fit the discharge needles in both of them, which increases the manufacturing cost.
Moreover, since the outer cylinder in which the slit is formed serves as the ground electrode, the ground electrode that receives the discharge from the tip of the discharge needle is exposed, which is a safety problem.
JP 2001-35686 A JP 2005-347117 A

  The problem of the present invention is that the discharge needle is easily planted, the entire manufacturing is easy, the safety is high, and it is the same as that provided without providing means for air injection. It is an object of the present invention to provide a decharged electrode structure that can be expected to produce a simple structure and can be manufactured at low cost.

The decharging electrode structure of the present invention according to claim 1 is formed of a rod-shaped main body made of an insulating material, a groove formed in the main body and having upper and lower surfaces opened therein, and at equal intervals in the longitudinal direction of the main body in the groove. A plurality of ribs, a metal electrode holding plate having a plurality of cut-and-raised portions formed at equal intervals, and a plurality of discharge needles press-fitted into the cut-and-raised portions of the electrode holding plate and held at equal intervals with bets, a portion of the portion and the discharge needles of the electrode holding plate including a respective cut-and-raised portion is embedded in each rib, the distal end portion of each discharge needle, in the groove from one side of each rib protrudes groove of It faces the top opening .

The invention according to claim 2, which is a specific form thereof, further includes a ground electrode provided in parallel to both side edges of the upper surface opening of the groove of the main body .
Further, the invention according to claim 3, the ground electrode made of a metal wire, which is installed in a narrow groove formed in the body along a side edge of the upper opening of the groove.

In the invention according to claim 4, the cut and raised portion is cut and raised in a U shape from one side surface of the electrode holding plate,
Electrode holding plate, the side and parallel to the inner surface of the groove of the body through each rib, the distal end portion of the discharge needle projecting from the ribs, Ru Tei along the center line of the groove.

The invention according to claim 5
The lower surface opening of the groove is partitioned by a rib into a plurality of small openings.
The invention according to claim 6, connector order to to connect the electrode holding plate and the feeding cable is provided at one end of the rod-shaped body.

According to the present invention, since the discharge needle is press-fitted and held in a large number of cut and raised portions formed on the metal electrode holding plate, the discharge needle holding structure is simple and the discharge needle is held in this way. Since the electrode holding plate is embedded in each rib in the groove of the rod-shaped body made of an insulating material together with a part of the discharge needle together with a part of each cut and raised portion, the electrode holding plate is highly safe and as a whole Since it has a simple structure, it can be manufactured at low cost.
Since both the front and back sides of the groove of the rod-shaped main body are open, air can escape, and if air is blown from the back side, ions can be carried away.

  According to the second aspect of the present invention, since the ground electrode is provided in parallel to both side edges of the opening surface on the front side of the groove, the discharge from the discharge needle is caused by a rod-shaped body made of an insulating material between the ground electrode and the ground electrode. Since the electrostatic capacity is interposed between the discharge needle and the ground electrode, spark discharge is prevented.

  According to the third aspect of the invention, the ground electrode is a metal wire, and is installed in the narrow groove on the surface of the rod-shaped main body, so that it is safe.

  According to the fourth aspect of the present invention, even when a large number of discharge needles are press-fitted into the cut-and-raised portions of the electrode holding plate, the tip ends of the discharge needles extend along the center line of the grooves in the grooves of the rod-shaped body. Since it protrudes from each rib, it discharges without being biased to one side between the ground electrodes on both sides arranged in parallel to both side edges of the opening surface of the groove.

  According to the invention of claim 5, since the opening on the back side of the groove of the rod-shaped main body is partitioned into a plurality of small openings by the rib, when air is blown from the back side of the rod-shaped main body, rectification is performed by the rib, You can blow on average around.

According to the invention of claim 6, by a connector at one end of the rod-shaped body, it is cabling for power supply.

  Next, an embodiment of the present invention applied to a static eliminator will be described in detail with reference to the drawings.

  As shown in FIG. 1, the static eliminator of this example has a main body 1 molded into a square bar shape with a resin (insulating material). The main body 1 has a groove 2 extending over its entire length. In this groove 2, as shown in FIGS. 2, 3 and 7, a large number of ribs 3 crossing the main body 1 are equally spaced in the longitudinal direction. And is formed integrally. Since the rib 3 is provided at a position biased downward (back side) with respect to the groove 2, the upper surface opening 2 a which is the front side of the groove 2 is open over the entire length, Since the inner edge convex part 4 which narrows the width | variety of the groove | channel 2 is integrally formed with the rib 3 in the lower end part, the lower surface (back side) of the groove | channel 2 is divided into many small openings 2b partitioned by the rib 3 It has become.

  On the upper surface of the main body 1, narrow grooves 5 are provided in parallel on both side edges of the upper surface opening 2 a of the groove 2, and a ground electrode 6 that is a metal wire material is disposed in these narrow grooves 5.

  In the groove 2, a large number of discharge needles 7 are provided by embedding each one in the ribs 3, but the large number of discharge needles 7 are not so configured independently, As shown in FIGS. 8 and 9, it is held by one common metal electrode holding plate 8 and embedded in the rib 3 together with its holding portion (a part of the electrode holding plate 8).

  That is, as shown in FIGS. 12 and 13, the electrode holding plate 8 has a plurality of cut-and-raised portions 8 a on one side surface by making a cut parallel to a part thereof and cutting it into a U shape on one side. A plurality of discharge needles 7 are held on the electrode holding plate 8 at equal intervals by press-fitting one discharge needle 7 into each cut and raised portion 8a.

  Then, the electrode holding plate 8 thus configured is embedded in a large number of ribs 3 so that the side surface thereof is parallel to the inner side surface of the groove 2, so that the periphery including each cut-and-raised portion 8 a The tip of each discharge needle 7 protrudes from the upper surface of each rib 3 in the groove 2 together with a part of the needle 7, and the discharge needle 7 as a whole is centered in the groove 2 as shown in FIG. It is lined up in a straight line along the line.

  Resin connectors 9 and 10 that close both ends of the groove 2 are fixed to both ends of the main body 1 by fitting the concave and convex portions to each other. FIG. 14 shows a cross section of the portion. These connectors 9 and 10 are metal pieces screwed on the connectors 9 and 10 with screws 12 while receiving the end of the power supply cable 11 and connecting the core wire to the electrode holding plate 8. The ground electrode 6 can be grounded by connecting a ground wire 14 to a certain ground connection terminal 13.

  The connectors 9 and 10 at both ends can be used as a joint for connecting the static eliminators of the present example by adopting a male-female structure. At this time, the electrode holding plates 8 are electrically connected to each other, and the ground electrodes 6 are also electrically connected to each other.

  Since the static eliminator of this example has such a structure, when a high voltage is applied to the electrode holding plate 8 through the cable 11, a discharge occurs between the numerous discharge needles 7 and the ground electrode 6. As can be seen from the cross-sectional view of FIG. 9, the discharge does not occur directly with respect to the ground electrode 6 because the ground electrode 6 is disposed in the narrow groove 5 at both side edges of the upper surface opening 2 a of the groove 2. Since it is performed through a part of the main body 1 that is an insulating material, a capacitance due to a part of the main body 1 is interposed between the discharge needle 7 and the ground electrode 6.

  Ions generated in the groove 2 due to such discharge are released to the outside from the upper surface opening 2a on the front side of the groove 2, but if the air is blown from the back side of the main body 1, the ions on the back side partitioned by a large number of ribs 3 are discharged. Since a large number of small openings 2b pass through to the front side, the flow can be rectified by a large number of ribs 3.

  The present invention can be applied not only to a static eliminator but also to a charger charged with ions.

It is an overall perspective view of a static eliminator to which the present invention is applied. It is the fragmentary perspective view which cut the part in steps. It is a whole top view. It is the whole front part. It is a whole bottom view. It is an enlarged view of one end surface. It is sectional drawing in the AA of FIG. It is an expanded sectional view in the BB line of FIG. It is an enlarged end view in the BB line of FIG. It is an expanded sectional view in the CC line of FIG. It is an expanded sectional view in the DD line of FIG. The relationship between one discharge needle and an electrode holding plate is shown, (A) is a front view, (B) is a perspective view, and (C) is an exploded perspective view. It is a partially omitted front view showing a state where a large number of discharge needles are held by an electrode holding plate. It is a fragmentary sectional view which shows the structure of the one end part of a static elimination device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Groove | channel 2a Upper surface opening 2b Small opening 3 Rib 4 Inner edge convex part 5 Narrow groove 6 Ground electrode 7 Discharge needle 8 Electrode holding plate 8a Cut-and-raised part 9/10 Connector 11 Power supply cable 12 Screw 13 Ground connection terminal 14 Ground wire

Claims (6)

A rod-shaped main body made of an insulating material, a groove formed in the main body and having upper and lower surfaces opened therein, a plurality of ribs formed at equal intervals in the longitudinal direction of the main body in the groove, and a plurality of cut-and-raised portions A metal electrode holding plate formed at intervals, and a plurality of discharge needles press-fitted into each cut and raised portion of the electrode holding plate and held at equal intervals,
Wherein a portion of the portion and the discharge needles of the electrode holding plate including a respective cut-and-raised portion is embedded in each of the ribs,
Distal ends of the discharge needles, divided charging electrode structure, wherein the facing protrudes into the upper opening of the groove from one side of each rib in the groove. The decharging electrode structure according to claim 1 , further comprising a ground electrode provided in parallel to both side edges of the upper surface opening of the groove of the main body . The ground electrode is made of a metal wire rod, dividing the charge according possible to claim 2, characterized in that is installed in a narrow groove formed in said body along a side edge of the upper opening of the groove Electrode structure. The cut and raised portion is cut and raised in a U shape from one side of the electrode holding plate,
The electrode holding plate, the side and parallel to the inner surface of the groove of the body through each rib,
Tip of the discharge needle projecting from the rib dividing charging electrode structure as claimed in claim 2 or 3, characterized in Tei Rukoto along the center line of the groove. 5. The decharging electrode structure according to claim 1 , wherein the lower surface opening of the groove is partitioned into a plurality of small openings by the rib. Dividing charging electrode structure as claimed in claim 1, 2, 3, 4 or 5 in which connector because the electrode holding plate has to connect the power supply cable and being provided at one end of the rod-shaped body.

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