JPH0722080Y2 - Static eliminator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a static eliminator for neutralizing a charged object such as resin or rubber charged by static electricity, and more specifically, a projection for a discharge electrode for corona discharge. The outer periphery of the conductive member for applying a voltage to the insulating member is covered with an insulating member to insulate the conductive member, and the discharge electrode projection is provided in a posture projecting from the surface of a predetermined electrode projecting portion of the insulating member. The present invention relates to a static eliminator that neutralizes a charged object by using ions generated by electric discharge.

[Prior Art] In this type of static eliminator, there have been known ones generally known from the past, for example, as shown in FIGS. 5A and 5B.

FIG. 5A is a cross-sectional view showing an AC application type static eliminator which is an example of a conventional static eliminator, and FIG. 5B is a front view thereof. With reference to FIGS. 5A and 5B, the body 1 of the static eliminator
Is supported by a support 2, and a ground electrode 4 connected to the ground is attached to a lower portion of the support 2. In the figure, 5 is a high-voltage core wire, and a voltage of, for example, about 7 to 9 KV is applied to this high-voltage core wire 5. As shown in FIG. 5A, an insulating layer 7 is formed on the outer periphery of the high voltage core wire 5, and a plurality of ring-shaped capacitive coupling bodies 8 are externally fitted to the insulating layer 7. Each of the capacitive coupling bodies 8 is provided with one needle-shaped discharge electrode 3 protruding downward. The discharge electrode 3 may be bar-shaped (plate-shaped) or linear.
The capacitive coupling body 8 and the body 1 form an electrode projecting portion. In the figure, 6 is an insulator made of a plastic film or the like. The body 1 is made of an insulating material.

When static electricity is removed by corona discharge using such a conventional static eliminator, foreign matter adheres to the surface of the discharge electrode protrusion of the insulating member such as the body 1 along with the corona discharge. This foreign matter is most often dust, and the dust adheres and solidifies with moisture, resulting in surface resistance around the discharge electrode protrusions, for example.
It decreases from 10 ¹⁵ Ω to 10 ¹⁴ to 10 ¹³ Ω and further to 10 ¹² Ω. In addition, there are various kinds of foreign matter such as ink for application, paper powder, solvent (mostly of plastic type) or glue residue, and there are various kinds depending on the place where the static elimination electrode is attached.

When the surface resistance around the discharge electrode projection on the surface of the electrode protruding portion of the insulating member decreases, the leakage current increases, and finally, the leakage burn causes blackening, which causes a drawback of burning up in extreme cases. Further, the plurality of discharge electrode projections are electrically connected to each other due to the adhered foreign matter. For example, in the case of an AC voltage application type static eliminator, when discharge occurs in one needle-shaped discharge electrode 3. Means that all the charges generated in the plurality of capacitive coupling members (conductive members) 8 are concentrated on the needle-shaped discharge electrode 3 where the discharge has started, and no discharge occurs at the other needle-shaped discharge electrodes 3. As a result, a defect such as a decrease in charge removal performance occurs.

Furthermore, when the electrical resistance of the insulating member composed of the body 1 and the like is lowered, the voltage across the capacitor composed of the high voltage core wire 5, the insulating layer 7 and the capacitive coupling member (conductive member) 8 rises, causing dielectric breakdown. There is a risk of burning.

So, as an attempt to solve such a problem,
One known in the art is, for example, Shoukaisho 63-14.
There was one described in Japanese Patent No. 5299. This conventional static eliminator is configured by adding a plurality of discharge electrode parts divided in the longitudinal direction to a long and narrow static eliminator, and a plurality of discharge electrodes are discharged along with the static eliminator work of the static eliminator composed of a plurality of discharge electrode parts. It is configured such that only the discharge electrode portion that has deteriorated due to the adhesion of foreign matter or the like in the electrode portion is removed and replaced with a new discharge electrode portion.

[Problems to be Solved by the Invention] However, in this conventional static eliminator, foreign matter is attached to the insulating member itself which insulates the outer periphery of the conductive member for applying a voltage to the discharge electrode protrusion of each discharge electrode portion. Therefore, until the discharge electrode portion is replaced with a new one, foreign matter adheres to the insulating member due to use and the insulating member itself gradually deteriorates. Moreover, when the insulating member deteriorates, a large amount of waste is needed to replace the discharge electrode unit, which is a component of the static eliminator, which is a part of the static eliminator. It had the drawback of becoming an economy.

The present invention has been conceived in view of such circumstances, and an object thereof is to simply attach foreign matter to an insulating member that insulates an outer periphery of a conductive member for applying a voltage to a projection for a discharge electrode. It is to prevent by.

[Means for Solving the Problems] In the present invention, the outer periphery of a conductive member for applying a voltage to a discharge electrode projection for corona discharge is covered with an insulating member to insulate the conductive member, and a predetermined portion of the insulating member is provided. Is a static eliminator which is provided with the discharge electrode projection in a posture projecting from the surface of the electrode projecting portion and discharges a charged object by using ions generated by corona discharge. A cover member for covering the surface of the discharge electrode is provided, the discharge electrode projection is projected outward through the electrode projection hole of the cover member in a state of covering the surface of the electrode protruding portion, and the cover The member is configured to be detachable from the surface of the electrode protruding portion.

[Operation] According to the present invention, the covering member that covers the surface of the electrode protruding portion of the insulating member is mounted in a state where the discharge electrode projection is inserted and protrudes into the electrode protruding hole of the covering member. Covers the surface of the electrode protruding portion. As a result, the foreign matter caused by the discharge adheres to the surface of the cover member, and the adherence to the insulating member can be prevented. Moreover, since the cover member is configured to be attachable / detachable to / from the surface of the electrode projecting portion, the dirty cover member can be removed to easily remove the adhering foreign matter or scrape off the entire surface. It can be as new or replaced with a new one if necessary.

Embodiments of the Invention Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1A and 1B show an AC voltage application type static eliminator as an example of the static eliminator according to the present invention, and FIG. 1A is a cross-sectional view,
FIG. 1B is a front view.

The body 1 of the static eliminator is supported by a support 2, and a ground electrode 4 connected to the ground is attached to a lower portion of the support 2. In the figure, 5 is a high-voltage core wire, an insulating layer 7 is formed on the outer periphery of the high-voltage core wire, and a capacitive coupling body 8 made of a conductive material is provided on the outer periphery of the insulating layer 7. The high voltage core wire 5 and the capacitive coupling body 8 are capacitively coupled via the insulating layer 7. As a result, by applying an AC voltage to the high voltage core wire 5, the capacitive coupling body 8
Also, an AC voltage is generated, and an AC high voltage is generated in the needle-shaped discharge electrode 3 protruding downward from the capacitive coupling body 8. The body 1 is made of an insulating material and prevents the voltage generated in the capacitive coupling body 8 from leaking outward. The capacitive coupling body 8 and the body 1 form an electrode protruding portion. A covering member 19a is provided on the surface of the electrode protruding portion, that is, on the surface of the body 1 on the side of the needle-shaped discharge electrode protruding. The cover member 19a is made of an elastic material such as a resin such as vinyl and has a gutter shape. A through hole 13 for inserting the needle-shaped discharge electrode 3 is formed in the center in a vertical line in accordance with the position of the needle-shaped discharge electrode 3. The discharge electrode 3 may have a bar shape (plate shape) or a linear shape.

As shown in FIG. 1A, normally, this covering member 19a is applied to the body 1 side as shown by arrow a, and both the left and right sides are opened in the arrow B direction and fitted onto the body 1. If the charge is removed in this state, foreign matter such as carbon adheres to the surface of the covering member 19a in the vicinity of the needle-shaped discharge electrode 3 with corona discharge. Then, when removing the adhered foreign matter, the cover member 19a is removed from the body 1 while opening both left and right sides of the cover member 19a in the directions of arrows B, and the foreign matter adhered to the surface of the cover member 19a is removed by a brush or the like. To do. By doing so, there is no inconvenience that the plurality of needle-shaped discharge electrodes 3 obstruct the operation of removing foreign matter with a brush or the like. It should be noted that a disposable seal may be attached to the outer surface of the cover member 19a, and the foreign substance may be removed simply by peeling the seal member and discarding it without cleaning the cover member 19a with a brush or the like.

2A and 2B are cross-sectional views of a DC voltage application type static eliminator showing another example of the static eliminator according to the present invention. The main difference between the DC voltage application type static eliminator and the AC voltage application type static eliminator described above is that a DC voltage is applied to the high-voltage core wire 5 and the high-voltage core wire 5 is directly (Fig. 2A) or through a high resistance. (FIG. 2B) is the point where the needle-shaped discharge electrode 3 is projected. In the figure, 19b is a flat, highly insulating covering member made of ceramic, resin or the like. At the center of the cover member 19b, through holes 13 for inserting the needle-shaped discharge electrodes 3 are vertically formed in a line.

Normally, as shown in Figure 2A, this cover member
The cover member 19b is engaged and held by the engaging portions formed on the left and right side portions of the body 1 by pressing 19b in the direction of arrow a. By removing the electric charge in this state, foreign matter is attached to the outer surface of the covering member 19b along with the corona discharge. When removing the foreign matter, the cover member 19b
Is removed from the body 1 and the surface of 19b is cleaned with a brush or the like to remove the adhering foreign matter. As described above, a method may be adopted in which a disposable seal is attached to the covering member 19b, and when the attached foreign matter is removed, the seal is peeled off and discarded.

The first means for attaching the cover member 19a to the body 1 is
The method shown in FIG. C or FIG. 1D may be adopted. Figure 1C shows
The cover member 19a is closely attached to the discharge electrode projecting side surface of the body 1, and is attached by a screw 98. FIG. 1D shows the state where the cover member 19a is closely contacted to the discharge electrode projecting side screen of the body 1. It is attached by tightening with bind 99.

FIG. 3 is a perspective view showing another example of the covering member.

In the example shown in FIG. 3, the covering member is composed of a tape 19c, and the surface of the electrode protruding portion is covered by spirally winding the tape 19c around the outer periphery of the body 1 and adhering the tape 19c. And this tape wrapped around with static elimination
Foreign matter adheres to the surface of 19c, and when removing the foreign matter, it can be easily removed by peeling the wound tape 19c from the body 1.

FIG. 4 is a perspective view showing still another example of the covering member. The tape 19 is provided only on the protruding side of the discharge electrode 3 of the body 1.
Stick d. The tape 19d constitutes a covering member. Then, when removing the foreign matter attached to the surface of the tape 19d due to the removal of the charge, the tape 19d is simply peeled off from the body 1. Also, a plurality of tapes 19d may be attached in layers to the surface of the body 1 on which the discharge electrodes are protruded, and each time foreign matter adheres, the outer tape 19d may be sequentially peeled off to remove the foreign matter many times. Good.

In the present embodiment, an AC voltage application type static eliminator and a DC voltage application type static eliminator were shown as the static eliminator, but the present invention is not limited to this, and for example, a high frequency voltage application type static eliminator, generated ions are charged objects. It may be of various types such as a blown air blow type or nozzle type static eliminator, a flange type static eliminator for neutralizing charged objects passing through the pipe, a self-discharge type static eliminator, an internal pressure explosion proof static eliminator, and so on. Any material can be used as long as it can remove the charge from the charged object.
The capacitive coupling body 8 or the high-voltage core wire 5 constitutes a conductive member for applying a voltage to the discharge electrode protrusion (needle-shaped discharge electrode 3) for corona discharge. By the body 1,
An insulating member is configured to cover and insulate the conductive member. The through hole 13 or the tapes 19c and 19d form an electrode protrusion hole through which the discharge electrode protrusion provided in the protrusion posture is inserted and protrudes to the outside.

[Advantages of the Invention] The present invention is effective for corona discharge because the electrode projecting surface of the insulating member that covers and insulates the outer periphery of the conductive member for applying voltage to the discharge electrode protrusion is covered with the covering member. It is possible to prevent the accompanying foreign matter from adhering to the surface of the electrode protruding portion of the insulating member, and to prevent the deterioration of the insulating member due to the attachment of the foreign matter due to use. Moreover, the cover member with foreign matter attached can be removed, cleaned, or replaced with a new one as needed, and the cover member can be simply replaced without replacing the component members that make up the static eliminator itself. Sufficient, there is no waste in the replacement, it is possible to reduce the cost associated with the replacement. Further, when the cover member is attached, the discharge electrode projections protrude from the electrode projection holes of the cover member, so that the space between the plurality of discharge electrode projections is well covered by the cover member. Also, it is possible to prevent foreign matter from adhering to the space between the discharge electrode projections, and to completely prevent foreign matter from adhering to the surface of the electrode projection portion without leakage.

[Brief description of drawings]

FIG. 1A and FIG. 1b show an AC voltage application type static eliminator as an example of the static eliminator according to the present invention. FIG. 1A is its cross-sectional view, FIG. 1B is its front view, FIG. 1C and FIG. 1D. The drawings are cross-sectional views showing another example of the method of attaching the covering member. 2A and 2B are cross-sectional views showing a DC voltage application type static eliminator which is another example of the static eliminator according to the present invention. FIG. 3 is a perspective view showing another example of the covering member. FIG. 4 is a perspective view showing still another example of the covering member. 5A and 5B show a conventional example, FIG. 5A is a cross-sectional view of an AC voltage application type static eliminator, and FIG. 5B is a front view thereof. In the figure, 1 is a body, 3 is a discharge electrode, 5 is a high voltage core wire, and 19a to 1
9d is a cover member, 13 is a through hole, and 8 is a capacitive coupling body.

Claims (1)

[Scope of utility model registration request] 1. A conductive member for applying a voltage to a discharge electrode protrusion for corona discharge is covered with an insulating member to insulate the conductive member and project from a surface of a predetermined electrode protruding portion of the insulating member. In the neutralization device, the protrusions for the discharge electrode are provided in such a posture that the charged object is neutralized by using the ions generated by the corona discharge, and a cover member that covers the surface of the electrode protruding portion of the insulating member is provided. The projection of the discharge electrode is projected outward by inserting the electrode projection hole of the cover member in a state of covering the surface of the electrode projection part, and the cover member of the electrode projection part. A static eliminator characterized by being configured to be detachable from the surface.