JPH08298196A - Integrated dc static eliminator - Google Patents

Abstract

PURPOSE: To provide an integrated DC static eliminator compact in small size which eliminates necessity for increasing a length of an individual DC static eliminator by connecting the DC static eliminator to each other directly further in series. CONSTITUTION: As a DC static eliminator 1, in addition to a printed board 10 of implanting a plurality of discharge needles 9, also a printed board 14 of mounting a DC high voltage generating circuit is resin-buried in a common insulating holder 2, also with a recessed part 4 left as formed in an end face of the insulating holder 2. A common connecting block 21 is fitted to be connected mutually between the recessed parts 4 of the insulating holder 2 in the individual each DC static eliminator 1, thus connecting the DC static eliminator 1 to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC static eliminator for applying a plus / minus DC high voltage to plus / minus discharge needles to simultaneously generate ions of both plus / minus polarities to neutralize a charged object. Regarding improvement.

[0002]

2. Description of the Related Art The applicant of the present invention discloses, as a DC static eliminator of this type, as disclosed in Japanese Patent Publication No. 7-7715, a rod-shaped discharge part, a plus-side voltage doubler rectifier circuit and a minus-side voltage doubler. Divided into a DC high voltage generator having a rectifier circuit, these discharge unit and the DC high voltage generator are connected via a high-voltage cable, and a DC high voltage is applied to the discharge unit from an external DC high voltage generator, We have already provided a separate type DC static eliminator. The discharge part has a plurality of discharge needles implanted in the printed circuit board, and the positive and negative electrode leads are alternately divided into plus and minus to connect the printed wiring. This is one in which resin is embedded in the insulating holder and only a part of the discharge needle is projected from the resin surface.

[0003]

The conventional DC static eliminator has the following problems. Since a high voltage is applied to the discharge part from the outside through a high-voltage cable, there is a problem in safety, and a high level of technology and special attention are required in use. In addition, the probability of ignition and the occurrence of electromagnetic noise during abnormal discharge was not low. Since energy is stored in the high-voltage cable, power consumption due to reactive power is not small, and there are problems such as leakage with the ground plane. Since the discharge part, the DC high-voltage generator, and the high-voltage cable had to be prepared separately, it was troublesome in use, storage, and transportation. If the length of the discharge part is lengthened according to the width of the static electricity to be removed, the longer the length, the more difficult it is to manufacture, use, store and transport the DC static eliminator. . If the width of the static electricity to be removed is large and a plurality of discharge parts are installed side by side, the high voltage cable wiring and the DC high voltage generator as the power source are required for each of them, so
Not only is it uneconomical, but the problems mentioned above increase.

The object of the present invention is to solve the above-mentioned problems, that is, to improve the safety and convenience in use, storage and transportation with a compact structure in which the whole is integrated. At the same time, it is possible to suppress the reactive power consumption, the risk of ignition, and the generation of electromagnetic noise, and it is possible to properly respond to the wide range of static elimination without increasing the length of each DC static eliminator. It is to provide a body type DC static eliminator.

[0005]

In the integrated type DC static eliminator of the present invention, the discharge part and the DC high voltage generator in the above-mentioned conventional example are incorporated in an insulating holder which is the main body of the discharge part, and the whole is integrated. It has a structure. That is, a plurality of discharge needles are implanted in a printed circuit board, and wiring is divided into plus and minus on the printed circuit board, and the printed circuit board is embedded in resin in a groove-shaped insulating holder to partially discharge the discharge needles. It is the same as the conventional method that only the above is projected from the resin surface,
The printed circuit board and a DC high voltage generating circuit are embedded in a resin in an insulating holder.

It is preferable that the DC high voltage generating circuit is mounted on a printed board different from the printed board on which the discharge needles are embedded, and is embedded in a resin together with the printed board. The same applies to the high-frequency transformer that constitutes a part of the DC high-voltage generating circuit.

At the end of the insulating holder, a connecting portion which can be detachably connected in series with the insulating holder of another DC static eliminator may be provided. The connecting portion may be, for example, a recess provided on the end surface of the insulating holder, and the connecting block is fitted in the recess to connect the DC static eliminators.

[0008]

In the DC static eliminator according to the present invention, in addition to a printed board on which a plurality of discharge needles are implanted, a DC voltage is applied to the plus / minus high voltage on the plus / minus discharge needles. The high-voltage generator circuit is also embedded in the insulation holder and integrated with resin, so a high-voltage cable and an external dedicated high-voltage DC generator are not required, and low-voltage wiring is sufficient between the discharge part and the power supply. Also, a low voltage DC power supply is sufficient for the power supply.

If the DC static eliminators thus integrated are detachably connected in series, static electricity can be removed under the same condition over a wide range even if the length of one DC static eliminator is short. The number of connections can be arbitrarily adjusted according to the width to be neutralized. It is also possible to connect DC static eliminators having different lengths.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 show one DC static eliminator 1 according to the present invention. The DC static eliminator 1 has a single-piece structure in which a resin-molded oblong insulating holder 2 is used as a main body and the circuit shown in FIG. 4 is incorporated therein. The insulating holder 2 has a groove shape (a U-shaped cross section) in which an opening 3 is formed over the entire length of its one surface.
Then, both ends thereof are closed by a resin-made end cover 5 having the concave portion 4. The end cover 5 may be molded integrally with the insulating holder 2.

A discharge board 6 and a DC high voltage generating board 7 are embedded and fixed (molded) in the insulating holder 2 with a resin 8, and both boards 6 and 7 are electrically connected in the insulating holder 2. The discharge board 6 includes a plurality of discharge needles 9.
Of the discharge needles 9 on the printed circuit board 10 at equal intervals.
As shown in FIG. 4 (similar to the conventional example of Japanese Patent Publication No. 7-7715), positive and negative electrode leads 12 and 13 are alternately divided into plus and minus via a current limiting resistor 11. Printed wiring connection. The discharge board 6 is embedded with the printed circuit board 10 parallel to the resin surface 8a, and only part of the discharge needle 9 projects from the resin surface 8a.

The DC high voltage generating board 7 is the discharge board 6
The printed circuit board 14 different from the printed circuit board 10 of FIG.
A high frequency oscillator circuit 15 and a high frequency transformer 16 as shown in FIG.
The positive side voltage doubler rectifying circuit 17 and the negative side voltage doubler rectifying circuit 18 are mounted so as to form a DC high voltage generating circuit as a whole. Since the circuit configuration is the same as the conventional one, the description is omitted. The number of amplification stages of the positive voltage doubler rectifier circuit 17 is larger than that of the negative voltage doubler rectifier circuit 18 so that positive ions and negative ions can be generated equally.

FIG. 3 shows a printed circuit board 14 of a DC high voltage generating board 7, one end portion 14a of which is a high frequency oscillation circuit 1.
5 is mounted, the high frequency transformer 16 is mounted next to it, and the positive side voltage doubler rectifier circuit 17 and the negative side voltage doubler rectifier circuit 18 are mounted from there to the other end. The DC high voltage generating board 7 is mounted on the printed circuit board 14
Is vertically embedded in the bottom of the insulating holder 2 and is entirely embedded. At the input end 19 of the high-frequency oscillator circuit 15, the power cord 2 drawn from one side of the insulating holder 2
0 is connected, and is connected to a low-voltage (48 V or less in consideration of explosion protection) DC power source through the power cord 20.

The structure of one DC static eliminator 1 is as described above, and it goes without saying that it can be used alone, but a required plurality can be used by connecting them in series as shown in FIG. The connection is a rectangular connection block 2 prepared separately.
1 can be easily carried out by fitting the DC static eliminators 1 in the recesses 4 of the end cover 5 half by half,
It is also easy to separate. In addition, if a concave portion is provided on one end of the insulating holder 2 and a convex portion is provided on the other end, the concave portion and the convex portion can be fitted to each other so as to connect them without using the connecting block 21. Various other structures are conceivable as a structure for connecting the DC static eliminator 1.

[0016]

The effects of the present invention are listed below. In addition to a printed circuit board with multiple discharge needles implanted,
The high-voltage cable and external dedicated high-voltage generator are not required because the high-voltage cable and external DC high-voltage generator also have a compact structure in which resin is embedded in the insulation holder and the whole is integrated.
Not only will safety, convenience in use, storage, and transportation be improved, and economic efficiency will be improved, but also static elimination performance will be improved. Since there is no ground electrode, the ion generation efficiency is good. You do not have to use a high-voltage cable, you can simply connect it to the power supply with low-voltage wiring, and you can also use a low-voltage DC power supply, so you can suppress reactive power consumption, ignition danger, and electromagnetic noise generation. . If the DC static eliminators are detachably connected in series, 1
Even if the length of each DC static eliminator is short, it is possible to eliminate static electricity under the same conditions over a wide range. The number of connections can be arbitrarily adjusted according to the width to be neutralized. The convenience is further enhanced by preparing the DC static eliminators having different lengths.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a DC static eliminator according to an embodiment of the present invention cut in the lengthwise direction.

FIG. 2 is a cross-sectional view taken along the line AA in FIG.

FIG. 3 is a front view of a printed circuit board of a DC high voltage generating circuit of the DC static eliminator.

FIG. 4 is an electric circuit diagram of the DC static eliminator.

FIG. 5 is a cross-sectional view in which a plurality of DC static eliminators are connected.

[Explanation of symbols]

 1 DC static eliminator 2 Insulation holder 4 Recessed portion 8 Resin 9 Discharge needle 10 Printed circuit board 14 Printed circuit board 16 High frequency transformer 21 Connected block

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kuniyoshi Ogawa 8-20-15-1003 Hino, Konan-ku, Yokohama-shi, Kanagawa

Claims (5)

[Claims] 1. A plurality of discharge needles are implanted in a printed circuit board and are connected to the printed circuit board by dividing into plus and minus, and the printed circuit board is embedded in a groove-shaped insulating holder with a resin to discharge the discharge needles. In a DC static eliminator in which only a part of the above is projected from the resin surface, a DC high voltage generating circuit for applying a plus or minus high voltage to the plus or minus discharge needle is provided with the printed circuit board or the insulating holder. An integrated DC static eliminator characterized by being embedded in resin inside. 2. The high-voltage DC generating circuit is mounted on a printed board different from the printed board on which the discharge needles are implanted, and is embedded in resin together with the printed board. Integrated DC static eliminator. 3. The integrated DC static eliminator according to claim 2, wherein the DC high voltage generating circuit is mounted on a printed circuit board together with a high frequency transformer forming a part thereof, and these are embedded in a resin. 4. The integrated DC according to claim 1, 2 or 3, characterized in that a connecting portion which can be detachably connected in series with an insulating holder of another DC static eliminator is provided at an end of the insulating holder. Static eliminator. 5. The connection part is a recess provided in the end surface of the insulating holder, and the connection block is fitted in the recess so that the DC static eliminators can be connected to each other. The integrated DC static eliminator described in.