JP2021022541A - Static elimination blow gun and attachment - Google Patents

Abstract

To provide a static elimination blow gun capable of obtaining a high voltage efficiently by compressed air.SOLUTION: A static elimination blow gun 1 is equipped with an air feed zone 2 for feeding compressed air from the outside, a power generation part 3 for generating electricity by the air from the air feed zone 2, a discharger 4 for ionizing the air by using corona discharge generated by applying the electrical power generated by the power generation part 3 to an electrode, and a nozzle 5 for ejecting the ionized air thus generated by the air from the air feed zone 2. The power generation part 3 is equipped with a fan 31 rotating by receiving the compressed air, and a power generation motor 32 for generating power by rotation of the fan 31. The fan 31 is provided in a fan room 33 surrounding the fan 31, and an exhaust nozzle 36a for exhausting the compressed air is provided in the tip side wall of the revolving shaft 34 of the fan 31 in the fan room 33 while facing a part of the rotation region of the fan 31.SELECTED DRAWING: Figure 1

Description

The present invention relates to a static elimination blow gun capable of efficiently obtaining a high voltage by compressed air and an attachment that is attached to an air blow gun to become a static elimination blow gun.

It has been pointed out that static electricity causes adverse effects at various work sites.
For example, semiconductor parts such as ICs and liquid crystals have problems that a high voltage due to static electricity adversely affects the element (destruction due to the high voltage), and dust adheres due to the generated static electricity.
Also, in the painting of automobiles, etc., it has been pointed out that static electricity is generated due to friction between the car body and sandpaper in the footing work before painting, and problems such as deterioration of painting quality and paint coating efficiency are pointed out. ing.
In order to solve the above problem, a high voltage of about 5000V to 7000V is applied to the sharply molded electrode, compressed air is passed through the electrode, and ionized air is blown onto the painted surface or the above semiconductor parts. Static electricity elimination blow guns are used to neutralize static electricity and work in an environment that is not affected by static electricity.
A needle-shaped electrode having a sharp tip may be provided on each of the (+) side and (-) side, and a separate ground electrode may be provided in order to increase the efficiency of ionized air generation.
In a static elimination blow gun that uses compressed air, in order to obtain the high voltage of (+) and (-) above, a commercial power supply (for example, AC100V) is converted to direct current (for example, DC5V to 24V), and a relatively simple transformer or the like is used. The method of converting to a high voltage is used.
Also, instead of a commercial power supply, a rechargeable battery (Ni-Cd, Ni-H, lithium ion, etc.) is built in, and a voltage of about DC4.8V to 6V is applied to the high voltage primary side to achieve the above high voltage. A method of obtaining voltage is also adopted.
It is essential to obtain the high voltage as described above on the high voltage side, but since it is sufficient to create a situation where the high voltage can be applied to the needle-shaped electrode, almost no current flows and the high voltage is very small. It can be operated by the power supply, and even when charging, it can be covered by a level of power that is sufficient for the AC adapter.
However, in such a static elimination blow gun, it is necessary to prepare a commercial power source, a rechargeable battery, or the like.

Therefore, a static elimination blow gun has been proposed that does not require a commercial power source or a rechargeable battery and generates high voltage by itself using compressed air (see, for example, Patent Document 1).
However, even with such a static elimination blow gun, it is difficult to obtain a high voltage by compressed air, and stable static elimination work cannot be performed.

Jikkenhei 6-44098

The present invention has been made to solve the above-mentioned problems of the prior art, and provides a static elimination blow gun capable of efficiently obtaining a high voltage by compressed air.

The invention according to claim 1 is a static elimination blow gun that does not require power supply from the outside, and includes an air supply unit that supplies compressed air from the outside, a power generation unit that generates electricity by air from the air supply unit, and the above. It is provided with a discharge unit that ionizes air using corona discharge generated by applying the power generated by the power generation unit to the electrodes, and a nozzle that ejects the generated ionized air by the air from the air supply unit. The power generation unit includes a fan that receives compressed air and rotates, and a power generation motor that generates power by the rotation of the fan. The fan is provided in a fan chamber surrounding the fan, and the rotation shaft of the fan in the fan chamber is provided. A spout for ejecting the compressed air is provided on the wall on the tip side so as to face a part of the rotation region of the fan, and the direction of the spout is inclined from a direction parallel to the rotation axis of the fan to a rotation direction of the fan. The present invention relates to a static elimination blow gun characterized in that the flow direction of compressed air after the fan in the static elimination blow gun is parallel to the rotation axis of the fan.

In the invention according to claim 2, the discharge portion includes a positive electrode and a negative electrode, and each of the positive electrode and the negative electrode is composed of two or more metal wires having a diameter of 0.1 mm or more and 0.3 mm or less. The static elimination blow gun according to claim 1, wherein the static elimination blow gun is provided.

The invention according to claim 3 is an attachment that is attached to an air blow gun to become a static elimination blow gun that does not require power supply from the outside, and is connected to an external air blow gun to supply compressed air, and the above. A power generation unit that generates electricity from the air from the air supply unit, a discharge unit that ionizes air using corona discharge generated by applying the power generated by the power generation unit to the electrodes, and the generated ionized air as the air. The power generation unit includes a nozzle that ejects air from a supply unit, and the power generation unit includes a fan that receives compressed air and rotates, and a power generation motor that generates power by the rotation of the fan. The fan is a fan chamber that surrounds the fan. On the wall on the tip end side of the rotation shaft of the fan in the fan chamber, an outlet for ejecting the compressed air is provided so as to face a part of the rotation region of the fan, and the direction of the outlet is the direction of the fan. The present invention relates to an attachment characterized in that it is inclined from a direction parallel to a rotation axis to a rotation direction of a fan, and the flow direction of compressed air after the fan in the static elimination blow gun is parallel to the rotation axis of the fan.

In the invention according to claim 4, the discharge portion includes a positive electrode and a negative electrode, and each of the positive electrode and the negative electrode is composed of two or more metal wires having a diameter of 0.1 mm or more and 0.3 mm or less. The attachment according to claim 3, wherein the attachment is characterized by the above.

According to the static elimination blow gun of the invention according to claim 1, since the compressed air surely catches the blades of the fan, a high voltage can be efficiently obtained.

According to the static elimination blow gun of the invention according to claim 2, since the area of the tip portion does not change even if the tip portion deteriorates, it is unlikely that the ability to generate ionized air deteriorates, and the life of the electrode is longer than that of the needle electrode. become longer.

According to the attachment of the invention according to claim 3, since an air supply unit is not required, the cost can be reduced.

According to the attachment of the invention according to claim 4, since the area of the tip portion does not change even if the tip portion deteriorates, it is unlikely that the ability to generate ionized air deteriorates, and the life of the electrode is longer than that of the needle electrode. Become.

It is a side partial sectional view of the static elimination blow gun which concerns on 1st Embodiment of this invention. It is an exploded perspective view of the part around the fan of the static elimination blow gun. (A) is a side sectional view of a power generation unit of the static elimination blow gun, (b) is a front view of the front casing as viewed from the direction A of FIG. 3 (a), and (c) is a rear casing of the rear casing A. It is a front view seen from the direction, (d) is a side view of the front casing 37a seen from the B direction of FIG. 3 (a). It is a side view of the static elimination blow gun which concerns on 2nd Embodiment of this invention. It is a figure which shows the manufacturing method of the electrode of the static elimination blow gun. It is external drawing of the fan of the static elimination blow gun which concerns on other embodiment of this invention.

[First Embodiment]
A preferred embodiment of the static elimination blow gun according to the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view of the static elimination blow gun 1 of the present embodiment. FIG. 2 is an exploded perspective view of a portion around the fan 31. FIG. 3A is a side sectional view of the power generation unit 3, FIG. 3B is a front view of the front casing 37a as viewed from the direction A of FIG. 3A, and FIG. 3C is a rear view. It is a front view which looked at the casing 37b from the direction A, and FIG. 3 (d) is a side view which looked at the front casing 37a from the direction B of FIG. 3 (a).
The static elimination blow gun according to the first embodiment will be described with reference to FIGS.
The static elimination blow gun 1 of the present embodiment does not require an external power supply.
The static elimination blow gun 1 applies the air supply unit 2 that supplies compressed air from the outside, the power generation unit 3 that generates power from the air from the air supply unit 2, and the power generated by the power generation unit 3 to the electrode 41. The power generation unit 3 includes a discharge unit 4 that ionizes air using the corona discharge generated by the above, and a nozzle 5 that ejects the generated ionized air by the air from the air supply unit 2. A fan 31 that receives and rotates and a power generation motor 32 that generates power by rotating the fan are provided. The fan 31 is provided in a fan chamber 33 that surrounds the fan, and the rotation shaft 34 of the fan 31 in the fan chamber 33. A spout 36a for ejecting the compressed air is provided on the wall 35a on the tip side so as to face a part of the outer peripheral side of the rotation region of the fan 31, and the direction of the spout 36a is parallel to the rotation shaft 34 of the fan 31. It is inclined in the rotation direction of the fan 31 from the direction, and the flow direction of the compressed air after the fan 31 in the static elimination blow gun 1 is parallel to the rotation axis of the fan.

The electricity generated by the power generation motor 32 is boosted to a high voltage by the booster unit 6 and supplied to the electrode 41 of the discharge unit 4. A counter electrode (earth electrode) 42 is provided on the tip end side of the electrode 41.
The power generation motor 32 is a DC power generation motor, and the booster unit 6 is a DC / DC converter.
The entire portion of the static elimination blow gun 1 other than the air supply portion 2 is referred to as the main body portion 7.
The main body 7 has a connecting unit 71 connected to the air supply unit 2, and the compressed air from the air supply unit 2 is supplied to the power generation unit 3 through the connection unit 71.

The fan 31 is pivotally supported by a rotating shaft 34, and the rotating shaft 34 is provided with bearings 38 in front of and behind the fan 31.
The fan chamber 33 is surrounded by a front casing 37a and a rear casing 37b.
The bearing 38 in front of the fan 31 is fitted in the front casing 37a, and the bearing 38 after the fan 31 is fitted in the rear casing 37b.
The rotating shaft 34 of the fan 31 is coupled to the rotating shaft of the power generation motor 32.
The electrode 41 is provided with one needle-shaped metal having a sharp tip on each of the + side and the-side, and a high voltage is applied from the booster unit 6.

The air supply unit 2 is connected to an air supply source such as a compressor by an air hose.
By pulling the trigger 21 of the air supply unit 2, compressed air is supplied to the connection portion 71 of the main body portion 7 and ejected from the ejection port 36a.
When the fan 31 is rotated by the compressed air from the ejection port 36a, the power generation motor 32 generates electricity via the rotating shaft 34.

The spout 36a will be described.
An outlet 36a for ejecting compressed air is provided so as to face a part of the outer peripheral side of the rotation region of the fan 31.
The direction of the ejection port 36a is inclined from the direction parallel to the rotation axis 34 of the fan 31 to the rotation direction of the fan 31. That is, the spout 36a is twisted in the circumferential direction.
In the spout 36a of the front casing 37a, the mouth on the side where the compressed air enters is represented as h and the mouth on the exit side is represented as h'(see FIGS. 3A, 3B, 3D).
As can be seen from FIG. 3B, the positions of h and h'are displaced in the circumferential direction, and it is desirable that h and h'are arranged on the same circle.
The twist angle of the ejection port 36a with respect to the direction parallel to the rotation axis 34 of the fan 31 is preferably 30 ° to 45 ° as shown in FIG. 3D. Also in the connection portion 71, the passage path of the compressed air is twisted in the same manner as the ejection port 36a (see FIG. 2).
It is desirable that the position of the spout 36a is slightly inside the outer diameter of the blade so as to surely hit the outer peripheral portion of the blade of the fan 31. The shape of the spout 36a should be set so that the compressed air reliably catches the blades of the fan 31 (hits the blades), such as a cylinder or a conical trapezoid (the mouth on the h side is wide and the mouth on the h'side is narrow). desirable.
By making the opening 36b of the rear casing 37b large, the fan 31 can be rotated smoothly, and the power generation motor 32 can be reliably rotated.
The compressed air that has passed through the opening 36b of the rear casing 37b passes around the power generation motor 32, enters the discharge section 4, is ionized after passing through the electrode 41 to which a high voltage is applied, is discharged from the nozzle 5, and is discharged from the automobile. It is sprayed on an object with static electricity such as the car body to remove static electricity.
The twist angle of the blades of the fan 31 (see FIG. 2) is set to 30 ° on the inner peripheral side and 45 ° on the outer peripheral side, but the twist angle is not limited to this.

By setting the position, twist, and shape of the spout 36a in this way, the compressed air surely catches the blades of the fan 31, so that a high voltage can be obtained.
Further, since the flow direction of the compressed air after the fan in the static elimination blow gun is parallel to the rotation axis of the fan and is linear, the pressure loss of the compressed air is reduced and a high voltage can be obtained.

[Second Embodiment]
The static elimination blow gun 1 of the present embodiment has a different electrode form from the static elimination blow gun 1 of the first embodiment.
FIG. 4 shows a side view of the static elimination blow gun 1 of the present embodiment. Each electrode 43 of the positive electrode and the negative electrode is composed of two or more metal wires 44.
In the case of a needle electrode, the tip becomes dull due to the deterioration of the tip due to the application of high voltage, and the ability to generate ionized air deteriorates.However, when a metal wire is used, the tip deteriorates even if the tip deteriorates. Since the area of the electrode does not change, it is unlikely that the ability to generate ionized air will deteriorate, and the life of the electrode will be dramatically longer than that of the needle electrode. Further, even if the counter electrode is not used, there is no problem in performance.
The metal wire 44 may be left as it is cut with nippers or the like, and no special treatment for sharpening the tip is required. The type of metal is not particularly limited, but tungsten is preferable.

FIG. 5 shows an example of a method for producing the electrode 43.
Two tungsten wires 44a are crimped to the crimp terminal 45 (round shape) (see FIGS. 5 (a) and 5 (b)). The crimped crimp terminal 45 is bent as shown in FIG. 5 (c) and connected to the terminals of the respective electrodes 43 of the positive electrode and the negative electrode (FIG. 5 (d)).
Static electricity is removed by removing the opposing (earth) electrode, ionizing the compressed air that passes only through each of the (+) and (-) electrodes composed of the plurality of tungsten wires 44a, and spraying it on the object as static electricity elimination air. I do.
The diameter of the tungsten wire 44a used for the electrode is about 0.1 mm to 0.3 mm, and the optimum value is 0.2 mm.
Theoretically, the smaller the diameter, the sharper the tip and the higher the ion generation efficiency. However, considering the strength, rigidity, etc., it is difficult to use 0.1 mm or less, and if it exceeds 0.3 mm, the ion generation efficiency deteriorates. As for the length of the electrode, the length exposed from the crimp terminal is set to about 5 mm to 20 mm. Within this range, the generation of ionized air does not change, and there are no problems with strength or rigidity. Therefore, the determination may be made in consideration of ease of manufacture.

[Third Embodiment]
Although this embodiment is not shown, only the main body portion from which the air supply portion is removed from the static elimination blow guns of the first embodiment and the second embodiment is used as an attachment.
This attachment has the same structure as the main body of the static elimination blow gun of the first embodiment and the second embodiment, and can be used as a static elimination blow gun by connecting to an air blow gun (duster gun) of compressed air in a factory or the like. Can be used.
Since there is no air supply unit of the first embodiment and the second embodiment, the cost can be reduced.

<Other embodiments>
Embodiments of the present invention are not limited to those described above.
For example, the shape of the fan may be as shown in FIG. It is efficient because the compressed air ejected from the ejection port rotates the fan without passing between the blades.
Further, although DC electricity is generated by a power generation motor in the above embodiment, AC electricity may be generated. In this case, a transformer is used for the booster.

The static eliminating blowgun and attachment of the present invention are static eliminating blowguns and attachments capable of efficiently obtaining a high voltage by compressed air, and are used for removing static electricity on a painted surface of an automobile or the like.

1 Static elimination blow gun 2 Air supply unit 3 Power generation unit 31 Fan 32 Power generation motor 33 Fan chamber 34 Rotating shaft 35a Front wall 35b Rear wall 36a Ejection port 36b Opening 37a Front casing 37b Rear casing 4 Discharge section 41 Electrode 42 Opposite electrode 43 Electrode 44 Metal Wire 44a Tungsten wire 45 Crimping terminal 5 Nozzle 6 Booster 7 Main body

Claims (4)

It is a static elimination blow gun that does not require external power supply.
An air supply unit that supplies compressed air from the outside and
A power generation unit that generates electricity from the air from the air supply unit and
A discharge unit that ionizes air using the corona discharge generated by applying the electric power generated by the power generation unit to the electrodes, and a discharge unit.
It is equipped with a nozzle that ejects the generated ionized air by the air from the air supply unit.
The power generation unit includes a fan that receives compressed air and rotates, and a power generation motor that generates power by the rotation of the fan.
The fan is provided in a fan chamber surrounding the fan.
An outlet for ejecting the compressed air is provided on the wall of the fan chamber on the tip end side of the rotation shaft of the fan so as to face a part of the rotation region of the fan.
The direction of the spout is inclined from the direction parallel to the rotation axis of the fan to the rotation direction of the fan.
A static elimination blow gun characterized in that the flow direction of compressed air after the fan in the static elimination blow gun is parallel to the rotation axis of the fan. The discharge unit includes a positive electrode and a negative electrode, and has a positive electrode and a negative electrode.
The static elimination blow gun according to claim 1, wherein each of the positive electrode and the negative electrode is made of two or more metal wires having a diameter of 0.1 mm or more and 0.3 mm or less. It is an attachment that is attached to an air blow gun and becomes a static elimination blow gun that does not require external power supply.
An air supply unit that is connected to an external air blow gun and supplies compressed air,
A power generation unit that generates electricity from the air from the air supply unit and
A discharge unit that ionizes air using the corona discharge generated by applying the electric power generated by the power generation unit to the electrodes, and a discharge unit.
It is equipped with a nozzle that ejects the generated ionized air by the air from the air supply unit.
The power generation unit includes a fan that receives compressed air and rotates, and a power generation motor that generates power by the rotation of the fan.
The fan is provided in a fan chamber surrounding the fan.
An outlet for ejecting the compressed air is provided on the wall of the fan chamber on the tip end side of the rotation shaft of the fan so as to face a part of the rotation region of the fan.
The direction of the spout is inclined from the direction parallel to the rotation axis of the fan to the rotation direction of the fan.
An attachment characterized in that the flow direction of compressed air after the fan in the static elimination blow gun is parallel to the rotation axis of the fan. The discharge unit includes a positive electrode and a negative electrode, and has a positive electrode and a negative electrode.
The attachment according to claim 3, wherein each of the positive electrode and the negative electrode is made of two or more metal wires having a diameter of 0.1 mm or more and 0.3 mm or less.

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