JP2002151293A - Electrostatic removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust air volume of ionized air without changing the number of rotation of a fan. SOLUTION: In a housing 11 of an electrostatic removing device, an air intake 17 guiding air to an inner fan is formed as well as a blowout duct 23 guiding discharge air outside from the fan, and a discharge electrode to generate ionized air is built in the duct 23. An air volume adjusting plate 27 to adjust an opening of the air intake 17 is provided in free sliding in the housing 11, and a blow out volume of the ionized air blowing out from the blowout duct 23 is adjusted by the air volume adjusting plate 27. A centrifugal sirocco fan or a breaking-through cross flow fan is used as a fan.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static electricity removing device for removing static electricity from various members such as electronic parts.

[0002]

2. Description of the Related Art When manufacturing or assembling electronic components, if static electricity is generated in the electronic components or a jig for manufacturing and assembling the electronic components, the manufacturing and assembling work of the electronic components cannot be performed smoothly. In view of this, ionized air is blown to a member that requires static elimination by using an electrostatic eliminator called an ionizer or an ion generator. The static eliminator for such an application has a blower for generating a flow of air, and an electrode pair arranged in an air flow blown from the blower, and causes a voltage to be applied to the electrodes to cause corona discharge. As a result, ionized air is generated, and static electricity can be removed by blowing the ionized air onto a predetermined member.

[0003] A blower, that is, a fan or a blower is used to generate an air flow, and the fan may be of an axial flow type, a once-through type, a centrifugal type, or the like depending on the flow direction of the air. In the centrifugal type, there is a multi-blade type in which air flowing in the axial direction to the fan is discharged in the radial direction,
This type is also called a sirocco fan. Also,
The once-through type is a type that discharges air that flows radially into the fan in the radial direction. It is also called a cross flow fan, and the length of the fan can be made relatively long, and It is used when you want more.

[0004]

When the static eliminator is used to remove static electricity from electronic parts and the like, the static eliminator is installed on an electronic component manufacturing and assembling line, so that the apparatus is small in size. It is desirable. Moreover, in order to cause corona discharge at the electrodes, a high voltage must be generated, but it is difficult to provide a dedicated high-voltage power supply or high-voltage wiring for a static eliminator in a factory. Therefore, in order to be able to operate using a commercial power supply, the commercial power supply is converted into a low-voltage DC current and then supplied to the static electricity removing device. In order to cause corona discharge at the electrodes, the electrodes are supplied with a current converted from a DC current into a high voltage and into a high frequency by a power supply unit.

[0005] On the other hand, in order to remove static electricity from electronic components and the like using an electrostatic removal device, it may be necessary to adjust the flow rate of ionized air blown to the electronic components. This is because there are various types of electronic components, from relatively heavy ones to fairly light ones. That is, when static electricity is removed from various electronic components using the same type of static electricity eliminator, some electronic components may be displaced or blown off by ionized air.

[0006] Therefore, it is necessary to adjust the discharge air volume of the ionized air according to the situation where the static electricity removing device is used. To adjust the air volume, it is conceivable to adjust the rotation speed of the motor that drives the fan, but to control the rotation speed of the motor, a controller for changing the voltage and current supplied to the motor is required. Must be built into the static eliminator. However, in order to reduce the size of the static electricity removing device, it is necessary to adjust the air flow without providing these controllers.

An object of the present invention is to adjust the flow rate of ionized air without changing the rotation speed of the blower.

[0008]

SUMMARY OF THE INVENTION The present invention provides a static eliminator according to the present invention, in which a blower is incorporated, a housing having an air intake formed therein for guiding air to the blower, and mounted on the housing to discharge air from the blower. An air outlet duct for guiding air to the outside, a discharge electrode provided on the air outlet duct for generating ionized air, and an air volume adjustment slidably mounted on the housing and adjusting an opening of the air intake. And an opening of the air intake is adjusted by the air volume adjustment plate to adjust an amount of ionized air blown out from the air outlet duct.

In the static eliminator according to the present invention, the blower is a centrifugal sirocco fan or a cross-flow type cross flow fan. Further, in the static eliminator of the present invention, the air intake is formed of a plurality of slits. Further, the static eliminator is characterized in that a direction adjusting duct for changing a direction of the discharge air is provided in the blowing duct.

In the present invention, the flow rate of the ionized air is adjusted by adjusting the opening of the air intake with the air volume adjusting plate, so that the air volume can be adjusted without controlling the rotation of the blower. It can be carried out.
This eliminates the need to incorporate a motor controller in the housing, and achieves downsizing of the device.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing an external appearance of a static eliminator according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG.

The static eliminator 10 has a thin rectangular parallelepiped housing 11 having a height H, a width W, and a depth D, and a blower 12 composed of a sirocco fan is incorporated in the housing 11. I have. As shown in FIG. 2, the blower 12 has a fan rotor 14 having a plurality of blades, that is, fan blades 13 arranged at a fixed radius from the center of rotation and extending in the axial direction. Is rotatable in the fan casing 15. Air is guided to the fan casing 15 in the axial direction with respect to the fan rotor 14, and the rotation of the fan rotor 14 changes the attitude in the radial direction and is discharged from the outlet 16.

As shown in FIG. 1, a circular air inlet 17 is formed on one side of the housing 11 so as to correspond to the air inlet of the fan casing 15. A protective frame 18 made of a metal bar is attached to the housing 11 in order to prevent a finger or foreign matter from entering. Protection frame 18
In FIG. 1, a total of four screw members 21 and 22, two upper and two lower members, are used to attach the screw member 21 to the housing 11.

In order to guide the air flowing from the air inlet 17 and discharged from the outlet 16 to the outside, an outlet duct 23 is mounted on the front side of the housing 11. It is divided into two flow paths. Discharge needles 24 are provided in the respective flow paths, and a pair of discharge electrodes is formed by the respective discharge needles 24 and the conductors forming the blowout duct 23. A power supply unit 25 is incorporated in the housing 11.
6, for example, DC24
Volt power is supplied. The power supply unit 25 supplies DC power to a motor (not shown) for rotationally driving the blower 12, and has a power converter that converts DC current to a high frequency of a predetermined high voltage.
A predetermined high-frequency voltage is supplied to the discharge electrode. Therefore, the air is discharged from the outlet 16 and the outlet duct 23
The air flow flowing inside is ionized by corona discharge at the discharge electrode, and the ionized air is guided to the outside of the device.

A constant current and a constant voltage are supplied to the motor so that the blower 12 rotates at a constant rotation speed, and the amount of ionized air is determined by the rotation speed of the blower 12. Some are not adjusted. Therefore, in order to adjust the opening degree of the air intake 17 to adjust the discharge air volume, as shown in FIG. 1, an air volume adjustment plate 27 made of a quadrilateral plate is slidably mounted on the housing 11. I have. This air volume adjustment plate 27
Is attached to the housing 11 by screw members 22 for attaching the protection frame 18, and two long holes 28 are formed in the air volume adjustment plate 27 corresponding to the positions of the two screw members 22. Therefore, the opening of the air intake 17 can be adjusted to an arbitrary opening by sliding the air volume adjusting plate 27 with the screw member 22 loosened, and after the predetermined opening is set, the screw member 22 can be adjusted. The air flow adjusting plate 27
Is fixed to the housing 11.

As described above, the housing 11 is driven without changing the rotation speed of the blower 12 driven by the motor.
By adjusting the degree of opening of the air intake 17 formed in the above, it is possible to easily adjust the blowing amount of the ionized air. This eliminates the need for incorporating a controller for adjusting the number of rotations of the motor in the housing 11, the size of the housing 11 can be made very close to the outer diameter of the fan casing 15, and the size of the static electricity removing device can be reduced. Can be In addition, as shown in FIG. 1, the air volume adjustment plate 27 may not be disposed outside the housing 11 but may be disposed inside the housing 11.
In this case, the operation knob is projected outward, and the air volume adjustment plate 27 is adjusted and moved by the operation knob. Also,
As shown in FIG. 1, the air volume adjustment plate 27 slides up and down in FIG. 1, but may slide in the left and right direction.

FIG. 3 is a plan view showing a static eliminator according to another embodiment of the present invention, FIG. 4 is a front view of FIG. 3, and FIG. 5 is a right side view of FIG. FIG. 6 is a sectional view taken along the line BB in FIG. 4. In these figures, members common to those in the above-described embodiment are denoted by the same reference numerals.

As compared with the case shown in FIG. 1, the housing 11 has a width W which is longer than the depth D and a lower height H. As shown in FIG. The blower 12 is installed so as to extend in the direction of the width W. This blower 12 is a cross flow type,
The fan rotor 14 has a plurality of fan blades 13 having a dimension longer than the diameter, and is rotatably incorporated in the fan casing 15. The fan rotor 14 is driven by a motor 29 attached to the fan casing 15. You.

An air inlet 1 is provided on the upper surface of the housing 11.
External air flows into the fan rotor 14 in the radial direction from the air intake 17. The inflowing air flows through the fan rotor 14 in the radial direction, and is guided to the outside from an outlet duct 23 provided on the front of the housing 11. The inside of the blow-out duct 23 is divided into five flow paths, and a discharge needle 24 is provided in each flow path as in the case shown in FIG. 2, and a discharge electrode is formed by the duct-side conductor. .

A direction adjusting duct 31 is attached to the blow-out duct 23 in order to change the direction of ionized air discharged from the outlet duct 23. The direction adjusting duct 31 can swing freely around a mounting screw 32. It has become.

As shown in FIG. 3, the air inlet 17 is formed by forming a plurality of slits in the housing 11, and the outer surface of the housing 11 is provided on the outer surface of the housing 11 to adjust the opening degree of the air inlet 17. An air volume adjusting plate 27 is slidably mounted. The air volume adjusting plate 27 is attached by a screw member 33, and the air volume adjusting plate 27 has a long hole 28 with which the screw member 33 is engaged.
Are formed. Therefore, by loosening the screw member 33 and sliding the air volume adjustment plate 27, the opening of the air intake 17 can be adjusted to an arbitrary opening.
After the adjustment, if the screw member 33 is fastened, the air volume adjustment plate 27 is fixed. Although the air volume adjusting plate 27 slides in the left and right direction in FIG. 3 in the direction of the width W of the housing 11, it may be slid in the vertical direction in FIG. Housing 11
Therefore, the air volume adjustment plate 27 comes out.

In this type of static eliminator,
The amount of air that is ionized and blown out from the blowout duct 23 can be adjusted without controlling the number of rotations of the motor 29. In each device,
Since the discharge needle 24 is provided in the blow-out duct 23 to ionize the airflow in the blow-out duct 23,
The blow-out duct 23 also functions as a discharge unit, and the size of the device can be reduced.

As described above, the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention. For example, in the illustrated case, a sirocco fan and a cross flow fan are used as the blower, but the present invention is not limited to these, and an axial flow fan or blower may be used. Further, the shape of the air intake 17 shown in FIG. 1 may be formed by a plurality of slits as shown in FIG. Further, the direction adjusting duct 31 may be used in the apparatus shown in FIGS.

[0025]

According to the present invention, the amount of air blown by a blower and ionized by a discharge electrode is controlled without controlling the number of rotations of a motor for rotating the blower.
Since the adjustment is made by adjusting the opening of the air intake formed in the housing, there is no need to incorporate a controller for controlling the number of rotations of the motor into the housing,
The size of the housing can be reduced, and the size and cost of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a static eliminator according to an embodiment of the present invention.

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

FIG. 3 is a plan view showing a static eliminator according to another embodiment of the present invention.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a right side view of FIG.

FIG. 6 is a sectional view taken along line BB in FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 static electricity removing device 11 housing 12 blower 13 fan blade 14 fan rotor 15 fan casing 16 outlet 17 air intake 18 protective frame 21, 22 screw member 23 outlet duct 24 discharge needle 25 power supply unit 26 connector 27 air flow adjusting plate 28 length Hole 29 Motor 31 Direction adjustment duct 32 Mounting screw 33 Screw member

Continued on the front page (72) Inventor Shigeru Okawa 3-2-2-3 Marunouchi, Chiyoda-ku, Tokyo Inside Koganei Co., Ltd. (72) Isao Sugano 1-10-8 Motomiya, Tsurumi-ku, Yokohama-shi, Kanagawa Pref. F-term in Yokohama factory (reference) 5G067 AA41 DA22

Claims (4)

[Claims] 1. A housing in which a blower is incorporated and an air intake port for guiding air to the blower is formed; a blowout duct attached to the housing to guide air discharged from the blower to the outside; A discharge electrode provided in the duct, for generating ionized air, and an air flow adjustment plate slidably mounted on the housing and adjusting an opening degree of the air intake, the air flow adjustment plate comprising: A static eliminator, wherein an opening of an air intake is adjusted to adjust an amount of ionized air blown out from the blow duct. 2. The static eliminator according to claim 1, wherein the blower is a centrifugal sirocco fan or a cross-flow type cross flow fan. 3. The static eliminator according to claim 1, wherein the air intake comprises a plurality of slits. 4. The static eliminator according to claim 1, wherein a direction adjusting duct for changing a direction of the discharge air is provided in the blow-out duct. .