JP2719035B2 - Driving device for thin sheet material using electrostatic force - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a thin-leaf material driving device using electrostatic force.

(Prior art) Conventionally, electrostatic generators are well known as converting mechanical energy into electric field energy, and the reverse conversion, that is, converting electric field energy into mechanical energy, is known. It is an electrostatic motor.

The history of such electrostatic motors is old, and has been studied since the 18th century.
This is described in detail in Theory of Electrostatics, published by Ohmsha, pages 664 to 675.

The above-mentioned document discloses an induction motor utilizing a delay in polarization of a dielectric. The principle of this dielectric motor focuses on polarization of a dielectric substance placed in an electric field and utilizes a time delay of the polarization. That is, as shown in FIG. 9, when the dielectric b as the rotor is placed in the rotating electric field inside the stator a, the dielectric load of the dielectric b becomes an angle with the rotating electric field due to a time delay. Is shifted. The interaction between the charge and the rotating electric field becomes a turning force.

There are also motors using resistors instead of dielectrics. This motor utilizes the fact that the electric charge induced in the resistor in the rotating electric field is delayed with respect to the direction of the electric field.

(Problems to be Solved by the Invention) However, the conventional electrostatic motor has the following problems. (1) Since a suction force acts between the resistor and the electrode, it is difficult to form a film.

(2) A rotating mechanism having a stator and a rotor and having a certain gap is used, and a mechanism such as a bearing is used to maintain the gap. Therefore, it is difficult to narrow the gap over a wide area.
Further, in order to realize this, the stator and the rotor must be made sufficiently thick to increase the rigidity, so that the power density (force generated per unit) is impaired.

Therefore, it is difficult to make the device compact, and its power density is low.

In view of such a situation, the present applicant has already proposed an electrostatic actuator using a film. However, moving objects that can be driven by the actuator are:
They were limited to special films coated with resistors.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems and to provide a thin-leaf material driving device using electrostatic force capable of driving a general material such as an insulating film or paper.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides: (A) a thin-leaf material driving device using electrostatic force;
An ion generator that directly applies positive and negative charges to the thin leaf material,
A stator on which the thin-leaf material is placed and provided with a plurality of electrodes wired in an insulator, and a levitation force and a driving force applied to the thin-leaf material by switching a voltage to the plurality of electrodes to drive and position the thin-leaf material. And means for performing the following.

(B) In a thin-leaf material driving device using electrostatic force,
A thin-sheet material to which positive and negative charges are directly applied by an ion generator and to which a positive-negative band-shaped charge pattern is provided, a stator having the plurality of electrodes on which the thin-sheet material is mounted and wired in an insulator; And a means for applying a floating force and a driving force to the thin leaf material by switching the voltage to the electrodes to drive the thin leaf material, and for performing positioning.

(Function) According to the present invention, when positive and negative ions are sprinkled on an insulating film as a thin-leaf material in a state where a voltage is applied to the electrodes of the stator, the ions are attracted to the electrodes having the opposite signs of voltage, respectively. A charge pattern is formed on the conductive film along the electrodes. This charge is equivalent to a charge pattern created in an actuator using a resistor already proposed by the present applicant, and a force similar to that is generated. In this method, it is considered that the air substitutes for the role of the resistor layer in the conventional method by giving conductivity to air by ions.

It should be noted that the ion generator may be stopped or continuously operated after the charge pattern is first created. When the supply of ions is stopped, the charge pattern is fixed, so that the film can be driven at an accurate pitch.

On the other hand, if the supply of ions is continued, even if the charge pattern is displaced from the electrode, the charge pattern is corrected so as to be along the electrode, so that there is an advantage that the step-out phenomenon does not occur.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a driving device for a thin sheet material utilizing electrostatic force, showing an embodiment of the present invention, and FIGS. 2 to 6 are explanatory views of the operation of the driving device.

As shown in these figures, the lower stator 1 is obtained by embedding a strip electrode 4 in an insulator 2.

More specifically, the stator 1 is composed of a base layer made of a film-shaped insulator, a strip-shaped electrode 4 wired on the base layer, and an insulating layer on a film formed thereon. Become.

The thin leaf material 10 is an object to be driven, and an insulating film or paper can be used. In the conventional method using a resistor already proposed by the present applicant, only a material having a high resistor layer can be driven, and an insulating material cannot be driven. Since a generally used plastic film is an insulator, the conventional method cannot drive a general film, and its usefulness is limited.

According to the present invention, as described below, driving can be performed even with an insulating film, and the device can be used as a driving device for a general thin-leaf material. Further, without limitation to a plastic film, paper, glass, ceramic, and the like can be driven as long as the insulator is a thin insulator.

Such a thin leaf material 10 is placed on the stator 1 in a state of being in contact therewith. In addition, a needle electrode 6 for applying positive and negative charges on the thin leaf material 10, an AC high voltage source 5 (for example, 7 to 10 KV) connected thereto, and an ion generator as an ion generator, Blower (Corona discharge type static eliminator: For example, Aerostat A manufactured by Simco Japan KK)
(-80 type) 8 is used. Note that a thin wire can be used instead of the needle electrode 6 described above. The ion blower 8 applies positive and negative charges to the thin leaf material 10, and a voltage is selectively applied to the strip electrode 4, as described later, to drive the thin leaf material 10 and perform positioning.

The volume resistivity of the ionized air generated by the ion blower 8 is desirably 10 ¹⁰ to 10 ¹² Ω · m.

Although only one needle electrode 6 of the ion blower 8 is shown, it is desirable to provide a plurality of the needle electrodes 6 on the thin leaf material 10.

For example, the width l ₁ of the strip electrode 4 is 0.4 mm, the pitch l ₂ of the strip electrode 4 is 1.27 mm, the overall width l ₃ where the strip electrodes 4 are arranged is 126 mm, and the length l ₄ of the strip electrode ₄ is 175mm.

Next, the operation of the thin sheet material driving device using the electrostatic force will be described with reference to FIGS.

First, as shown in FIG. 2, a pretreatment of the insulating film 20 (for example, 10 ¹⁴ Ω or more) is performed. That is, each electrode group 4a ₁ , 4a ₂ , 4a ₃ , 4 embedded in the whole 2
The _{b 1, 4b 2, 4b 3} , 4c 1, 4c 2, 4c 3 while to 0V, and the ion blower 8, by applying positive and negative charge, neutralize if such there is residual charge To perform static elimination and perform initial setting.

Next, as shown in FIG. 3, the electrodes 4a ₁ , 4a ₂ , 4a which are the first electrode group embedded in the insulator 2 constituting the stator 1
₃ is a positive voltage + V, the second electrode group 4b ₁ , 4b ₂ , 4b ₃ is a negative voltage −V, and the third electrode group 4c ₁ , 4c ₂ , 4c ₃ is 0V.
Are respectively applied. In this state, ions are sprinkled on the insulating film 20 placed on the stator 1 by the ion blower 8 to form a charge pattern along the electrodes.

Next, as shown in FIG. 4, the voltage applied to each electrode is switched. That is, the electrodes 4a ₁ , 4a ₂ ,
The negative voltage −V is applied to 4a ₃ , and the electrodes 4b ₁ , 4b ₂ , 4b ₃ which are the second electrode group
The positive voltage + V, the third electrode 4c ₁ is an electrode group, 4c _2, 4c ₃ to a negative voltage -V is applied, respectively. Then, the electric charge in each electrode moves instantaneously, but the electric charge of the insulating film 20 is held because of its high resistance value.

Therefore, the electric charges of the electrodes 4a ₁ , 4b ₁ , 4a ₂ , 4b _{2 and} the electric charges thereon have the same sign, so that a repulsive force, that is, a force for floating the insulating film 20 is generated.

Then, the electrodes 4c ₁ - + charge of the insulating film 20 on the charge and the electrode 4b ₁ is sucked, the electrodes 4c ₁ - on the charge electrode 4a ₂ insulating film 20 - because charges repel Then, the insulating film 20 receives a driving force in the right direction and moves to the right.

Then, when the insulating film 20 moves one pitch to the right, the charge of the electrode and the charge of the insulating film 20 become different in polarity as shown in FIG. Then stop.

By repeating the above steps, the insulating film
20 can be driven and moved.

When the movement of the insulating film 20 to the predetermined position is completed, post-processing is performed. That is, as shown in FIG. 6, each of the electrode groups 4a ₁ , 4a ₂ , 4a ₃ , 4 embedded in the insulator 2 constituting the stator 1
With no voltage applied to b ₁ , 4b ₂ , 4b ₃ , 4c ₁ , 4c ₂ , 4c ₃ , positive and negative charges are applied by the ion blower 8,
If there is a residual charge, the charge is neutralized to remove the charge, and then when the insulating film 20 is removed, it can be easily peeled off.

In the above embodiment, the ion blower 8 is always operable. However, the ion blower 8 may be operated only once before the driving operation of the apparatus.

Further, when sprinkling ions on the film to be driven, it is not necessary to sprinkle the film on all the portions facing the stator electrodes, and as shown in FIG. You can give it.
Even in such a configuration, the band-shaped charge pattern formed in the portion where the ions are sprinkled is retained even when the film moves to the portion where the ions are not applied, so that the film can be driven.

FIG. 8 is a configuration diagram of a thin-leaf material driving device using electrostatic force, showing another embodiment of the present invention.

Here, the plurality of electrodes of the stator are arranged at a predetermined pitch radially with respect to the center point, and a thin sheet material that rotates around the center point is provided. Obtainable.

In this embodiment, as shown in FIG.
The stator 40 is configured. In other words, ring-shaped, which is the first electrode group in the insulating body 41 the electrode 42a ₁ ~42a _8, the second electrode 42b ₁ ~42b ₈ is an electrode group, the third is the electrode group electrodes 42c ₁ ～42C ₈
Are arranged radially.

On the other hand, as shown in FIG. 8 (b), the center axis 51 of the disc-shaped insulating film 50 is aligned with the center O of the stator 40,
Set rotatable. This disk-shaped insulating film 50
, A display hand 52 is designed.

Therefore, ions are sprinkled on the disc-shaped insulating film 50 as described above, though not shown.

Therefore, the positive voltage + V to the electrodes 42a ₁ ~42a ₈ is a first group of electrodes embedded in a ring-shaped insulator 41 constituting the stator 40, the electrode 42b ₁ ~42b ₈ is a second electrode group Negative voltage-
V, respectively applied 0V to the electrodes 42c ₁ ~42c ₈ is a third electrode group. Then, a charge pattern is formed on the disk-shaped insulating film 50 placed on the stator 40 along the electrodes of the stator 40.

Next, the voltage applied to each electrode is switched. That is,
The negative voltage -V to the electrodes 42a ₁ ~42a ₈ is a first electrode group, the second
Applying a positive voltage + V to the electrodes 42b ₁ ~42b ₈ is an electrode group, the third to the electrode 42c ₁ ~42c ₈ is an electrode group a negative voltage -V, respectively. Then, the electric charge in each electrode moves instantaneously, but the electric charge of the disc-shaped insulating film 50 is retained.

Thus, electrodes _{42a 1, 42b 1, 42a 2} , 42b 2, 42a 3, 42b 3, 42a 4, 4
Since the charges of 2b ₄ , 42a ₅ , 42b ₅ , 42a ₆ , 42b ₆ , 42a ₇ , 42b ₇ , 42a ₈ , 42b _{8 and} the charge of the disc-shaped insulating film 50 thereon have the same sign, Repulsive force is generated, a disc-shaped insulating film
50 surface. The electrodes 42c ₁ - + charge of the disc-shaped insulating film 50 on the charge and the electrode 42b ₁ is sucked, the electrode
42c _1- Electric charge and disc-shaped insulating film on electrode 42a ₂
Since the electric charge of 50 is repelled, a disc-shaped insulating film 50 is formed.
Rotates one pitch clockwise.

Then, when the disc-shaped insulating film 50 moves one pitch in the clockwise direction, the electric charge of the electrode and the disc-shaped insulating film move.
Since the electric charge of 50 has a different polarity, a suction force acts, and the disc-shaped insulating film 50 stops there.

As described above, by switching the voltage of the electrode by a regular rectangular pulse, the disk-shaped insulating film 50 can be intermittently and accurately rotated, and the accurate time can be displayed by the display hand 52. Can be.

With this configuration, an extremely thin timepiece can be obtained. In addition, since the stator 40, the disc-shaped insulating film 50, the electrodes and the wiring are made of a transparent material, it is possible to obtain a high-sense timepiece in which only the display hand 52 ticks the time.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible based on the gist of the present invention.
They are not excluded from the scope of the present invention.

(Effects of the Invention) As described above in detail, according to the present invention, since the mechanism does not have a movable part such as a roller and is composed of only electrodes and a drive circuit, the structure is simple and the size can be reduced. Can be. In addition, an insulating film,
A wide variety of materials can be used, such as thin insulating materials such as paper, glass, and ceramics.

Further, since a force can be directly applied to the entire surface of the thin leaf material, even a very thin material can be driven without wrinkling. For example, it can be used in a process for handling thin materials in a factory or a paper feeder in a small device.

Also, a plurality of electrodes are radially arranged at a predetermined pitch based on the center point, and a thin timepiece can be obtained by arranging a thin sheet material that rotates around the center point. In addition, a transparent timepiece can be obtained by making each member a transparent body.

[Brief description of the drawings]

FIG. 1 is a perspective view of a driving device for a thin sheet material utilizing electrostatic force, showing an embodiment of the present invention, FIGS. 2 to 6 are explanatory views of the operation of the driving device, and FIG. 7 is a stator of the present invention. FIG. 8 is a diagram showing an example in which an ion generator is installed only at the end portion of FIG. 8. FIG. 8 is a configuration diagram of a thin-leaf material driving device (rotary driving device) using electrostatic force, showing another embodiment of the present invention. FIG. 9 is a configuration diagram of a conventional electrostatic motor. 1,40 stator, 2 insulator, 4 strip electrode, 4a _{1
~4a 3, 4b 1 ~4b 3,} 4c 1 ~4c 3, 42a 1 ~42a 8, 42b 1 ~42b 8, 42
c ₁ ~42c ₈ ...... electrode group, 5 ...... AC high voltage source, 6 ...... needle electrodes, 7 ...... blower, 8 ...... ion blower (ion generator) 10 ...... thin sheet material, 20 ...... insulating Film, 41 ...
... Ring-shaped insulator, 50 ... Disc-shaped insulating film,
51… Center axis, 52… Indicator hand.

Claims (10)

(57) [Claims] (A) an ion generator for directly applying positive and negative charges to a thin-leaf material; and (b) a stator having a plurality of electrodes on which the thin-leaf material is mounted and wired in an insulator. c) A device for driving a thin-leaf material using electrostatic force, comprising means for applying a levitation force and a driving force to the thin-leaf material by switching voltages to the plurality of electrodes to drive the thin-leaf material, and for performing positioning. 2. The thin-leaf material driving device utilizing electrostatic force according to claim 1, wherein an electric charge is applied to the thin-leaf material only before driving. 3. An apparatus for driving a thin-leaf material using electrostatic force according to claim 1, wherein the thin-leaf material is connected during driving to apply an electric charge. 4. An apparatus for driving a thin sheet material using electrostatic force according to claim 1, wherein the electric charge is applied to the thin sheet material only on a part of the stator electrode. 5. An apparatus for driving a thin sheet material using electrostatic force according to claim 1, wherein said thin sheet material is an insulating film or paper having a surface resistance of 10 ¹⁴ Ω / □ or more. 6. An apparatus for driving a thin-leaf material using electrostatic force according to claim 1, further comprising means for removing charges as a pre-process from said thin-leaf material. 7. An apparatus for driving a thin-leaf material using electrostatic force according to claim 1, further comprising means for removing charge from said thin-leaf material as post-processing. 8. A thin-sheet material to which positive and negative charges are directly given by an ion generator and to which a positive-negative band-shaped charge pattern is provided; and (b) a plurality of thin-sheet materials which are placed and wired in an insulator. And (c) means for applying a floating force and a driving force to the thin leaf material by switching the voltage to the plurality of electrodes to drive the thin leaf material, and for performing positioning. Drive for thin-leaf material. 9. A thin leaf utilizing electrostatic force according to claim 1, wherein said plurality of electrodes are arranged at a predetermined pitch radially with respect to a center point, and comprise a thin sheet material which rotates around said center point. Material drive. 10. The thin leaf material has an indicating needle.
A driving device for a thin sheet material using the electrostatic force described in the above.