JP6322818B2 - Static elimination or charging device - Google Patents

Description

  The present invention relates to an apparatus for charging an object such as a film, or an apparatus for neutralizing an object.

For example, what was described in patent document 1 is conventionally known as this kind of static elimination apparatus.
This conventional static eliminator is for neutralizing static elimination objects such as a film. A bar-type discharge electrode is arranged in a direction substantially perpendicular to the film transport direction, and either positive or negative voltage is applied to the discharge electrode. To generate ions. The ions generated in this way are radiated toward the static elimination object, thereby neutralizing the static elimination object.

  And in order to make ion reach | attain the static elimination object reliably, the said discharge electrode is provided with the air jet nozzle which ejects air toward the static elimination object, and is trying to guide compressed air to this air jet outlet. . Therefore, ions generated by applying a voltage to the discharge electrode ride on the flow of air ejected from the air ejection port and reliably reach the static elimination object.

  If air is not ejected as described above, the generated ions may be neutralized before reaching the static elimination object, or may not reach the static elimination object as floating ions. Therefore, the total amount of ions that reach the static elimination object is reduced.

If the total amount of ions that reach the static elimination object decreases, the static elimination object cannot be sufficiently eliminated or the conveyance speed of the static elimination object cannot be increased.
If the static elimination object cannot be sufficiently neutralized, the intended purpose of static elimination cannot be achieved. Moreover, if the conveyance speed of a static elimination object cannot be raised, the efficiency in a static elimination process will worsen.

Therefore, it is an indispensable condition for the static eliminator to surely reach the static elimination target by ejecting air.
It should be noted that the theme of reliably reaching the target object by placing ions on the air flow is the same for the charging device.

JP 2005-209513 A

In the conventional apparatus as described above, the configuration is such that compressed air is guided to the discharge electrode in order to ensure that the generated ions reach the target to be neutralized or charged. Compressor to make is essential.
However, the compressor has a problem that a large installation space is required because the equipment becomes large.

In addition, since the compressor generates a loud noise during operation, it also causes noise.
Furthermore, since piping such as a hose is required to guide the compressed air from the compressor to the discharge electrode, there is a problem in that the equipment cost is increased by the amount of piping and the entire apparatus is enlarged.
An object of the present invention is to provide a static elimination or charging device capable of accelerating ions with a simple device and allowing the ions to reliably reach the object to be eliminated or charged.

A first aspect of the present invention is sandwiching the object to be a neutralization or charged directly opposite Rutotomoni provided a pair of discharge electrodes, sandwiching a respective discharge electrode, the above object is accelerating electrode is provided on the opposite side Yes.

Then, the above-described discharge electrode and the accelerating electrode located on the same side the boundary of the object is applied a voltage of the same polarity, it is between a pair of discharge electrodes confronting Nde clamping the object voltages of opposite polarity It has a feature in that the applied Ru configuration.

The second invention is characterized in that an AC voltage having a phase shifted by 180 degrees is applied to the pair of discharge electrodes.

According to the static elimination or charging device of the first invention, ions generated by applying a voltage to the discharge electrode are accelerated in the direction of the object by the action of the repulsive force of the acceleration electrode.
Then, in order to accelerate the ions, Tei Runode provided an acceleration electrode, conventional compressor becomes a factor in the size of equipment as unnecessary. Therefore, the entire apparatus can be reduced in size and no noise or the like is generated.

Furthermore, while providing a pair of discharge electrodes facing each other so as to sandwich the object, and because these discharge electrodes are configured to apply voltages of opposite polarities, ions generated by one discharge electrode, The ions that are attracted to the other discharge electrode and are generated by the other discharge electrode are attracted to the one discharge electrode. Since the ions generated in the discharge electrode are attracted to the discharge electrode on the opposite side, the ions can reliably reach the object by their attractive force.

According to the second static elimination or charging device, since the AC voltage having a phase shifted by 180 degrees is applied to the pair of discharge electrodes, the positive and negative ions are generated alternately, and the ions are reliably detected. Can be reached.

It is explanatory drawing which shows embodiment of this invention.

The illustrated embodiment is an apparatus for removing the static electricity while conveying the film F, which is a static elimination object, in the direction of the arrow.
A pair of discharge electrodes 1 and 2 are provided on one side of the film F. The discharge electrodes 1 and 2 are of a bar type, and the discharge electrodes 1 and 2 are arranged in the transport direction of the film F. The longitudinal directions of 2 are almost orthogonal. The discharge electrodes 1 and 2 thus configured are connected in parallel to the same first AC power source 3. Therefore, an AC voltage having the same phase is applied to both the discharge electrodes 1 and 2.

  A plate-like acceleration electrode 4 is provided on the rear side of the discharge electrodes 1 and 2, that is, on the side opposite to the film F with the discharge electrodes 1 and 2 interposed therebetween. The plate-like acceleration electrode 4 is arranged so as to cover the discharge electrodes 1 and 2. The acceleration electrode 4 thus configured is connected to a second AC power source 5 different from the first AC power source 3. The first and second AC power supplies 3 and 5 are configured to output voltages having the same phase. Therefore, the discharge electrodes 1 and 2 and the acceleration electrode 4 are always applied with an AC voltage having the same phase.

  On the other hand, a pair of discharge electrodes 6 and 7 are provided on the opposite side of the pair of discharge electrodes 1 and 2 with the film F interposed therebetween. Each of the discharge electrodes 6 and 7 maintains a positional relationship facing the discharge electrodes 1 and 2 and is connected to the third AC power supply 8 in parallel. Therefore, an alternating voltage having the same phase is applied to both the discharge electrodes 6 and 7. However, the AC voltage applied to the discharge electrodes 6 and 7 and the AC voltage applied to the discharge electrodes 1 and 2 are shifted in phase by 180 degrees.

  A plate-like acceleration electrode 9 is provided behind the discharge electrodes 6 and 7, that is, on the opposite side of the film F with the discharge electrodes 6 and 7 interposed therebetween. The plate-like acceleration electrode 9 is arranged so as to cover the discharge electrodes 6 and 7. The acceleration electrode 9 configured as described above is connected to a fourth AC power supply 10 different from the third AC power supply 8. The third and fourth AC power supplies 8 and 10 are configured to output voltages having the same phase. Therefore, an alternating voltage having the same phase is always applied to the discharge electrodes 6 and 7 and the acceleration electrode 9.

In the apparatus as described above, when a voltage is applied to all the electrodes, for example, if a positive voltage is applied to the discharge electrodes 1 and 2 on the front side, a negative voltage is applied to the discharge electrodes 6 and 7 on the back side. As a result, voltages having opposite polarities are applied, and positive ions and negative ions are alternately generated by the respective discharge electrodes 1, 2, 6, and 7.
At this time, since the voltage having the same polarity as that of the discharge electrodes 1 and 2 is applied to the acceleration electrode 4 on the front side, the repulsive force is generated between the acceleration electrode 4 and the ions generated by the discharge electrodes 1 and 2. Works. Accordingly, the ions are accelerated toward the film F by the action of this repulsive force.

  Similarly, a voltage having the same polarity as that of the discharge electrodes 6 and 7 is applied to the acceleration electrode 9 on the back side. A repulsive force acts between them. Therefore, the ions are accelerated toward the film F by the action of this repulsive force.

As described above, according to this embodiment, the ions generated by the respective discharge electrodes 1, 2, 6, 7 are accelerated toward the film F by the action of repulsive force between the acceleration electrodes 4, 9. Therefore, these ions will surely reach the film F that is the object of charge removal.
In addition, in this embodiment, since compressed air is not required as in the prior art, a compressor is also unnecessary. Therefore, various problems caused by the compressor do not occur.

In the above embodiment, the discharge electrodes 1, 2, 6, 7 and the acceleration electrodes 4 and 9 are provided on both sides of the film F. However, when only one of the films F is neutralized, the discharge electrode and the acceleration electrode are also provided. It is sufficient if it is provided only on one side of the film F.
However, if the discharge electrodes are provided on both sides of the film F as in this embodiment and the polarities of the applied voltages of the discharge electrodes are reversed, the ions generated by one of the discharge electrodes 1 and 2 are The ions that are attracted to the other discharge electrodes 6 and 7 and are generated by the other discharge electrodes 6 and 7 are attracted to the one discharge electrodes 1 and 2. Thus, since the ion produced | generated by the discharge electrode is attracted | sucked to the discharge electrode side on the other side, the effect that an ion can reach | attain the said film F reliably also by this attraction can be anticipated.

Moreover, if discharge electrodes are provided on both sides of the film F as described above, both sides of the film F can be neutralized.
Further, the first and second AC power supplies 3 and 5 and the third and fourth AC power supplies 8 and 10 do not necessarily have to be provided, but may be one.

Further, the AC power supply for the discharge electrodes 1 and 2 and the acceleration electrode 4 may be shared. Of course, the AC power supply for the discharge electrodes 6 and 7 and the acceleration electrode 9 may be shared.
Note that DC voltages having different polarities may be applied to each of the discharge electrodes 1, 2, 6, and 7. In this case, a DC voltage having the same polarity as that of the corresponding discharge electrode is also applied to the acceleration electrodes 4 and 9.

  Ideal for charging or static elimination of film.

F Films 1 and 2 as discharge objects 3 Discharge electrode 3 First AC power supply 4 Acceleration electrode 5 Second AC power supply 6 and 7 Discharge electrode 8 Third AC power supply 9 Acceleration electrode 10 Fourth AC power supply

Claims (2)

Across the object to be a neutralization or charged directly opposite Rutotomoni provided a pair of discharge electrodes, sandwiching a respective discharge electrode, the accelerating electrode on the other side is provided with the object,
In the above discharge electrode and the accelerating electrode located on the same side the boundary of the object, a voltage of the same polarity is applied,
Directly facing across said object neutralization or charging device was configured to voltages of opposite polarity Ru is applied by a pair of discharge electrodes. The charge eliminating or charging device according to claim 1, wherein an AC voltage having a phase shifted by 180 degrees is applied to the pair of discharge electrodes .

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