JPH0451912Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a dust removal device for objects having electrostatic properties such as plastics and ceramics.

(Prior Art) Generally, chargeable members such as plastics and ceramics are charged with static electricity due to friction. Therefore, when these chargeable members are charged, they attract dust floating in the air by electrostatic attraction.
When a chargeable member to which dust has adhered in this manner is painted or a product is assembled using the member, problems such as poor appearance of the product occur.

To deal with this problem, there is a known device that first removes static electricity from a charged member and then removes the dust that has adhered to the charged member. .

For example, air ions having a polarity opposite to that of the charging electrode of a chargeable member are generated by a discharge electrode by corona discharge, and the air ions are applied to the member to electrostatically neutralize the member. As a result, the dust whose electrostatic adhesion has been eliminated is removed from the surface of the component by blowing air from the air nozzle, and the removed dust is further discharged outside the dust removal processing area using a suction duct, etc. There is a dust removal device that prevents dust from re-adhering to the surface of the member.

However, although such dust removal devices are effective in removing dust adhering to flat surfaces such as films and sheets, in the case of chargeable materials with complex surface shapes, air ions generated by discharge electrodes may be removed. Since the air from the air nozzle is sprayed onto the surface of the member from one direction, dust remains attached to areas where the ions and air do not reach, resulting in the above-mentioned problem.

(Problems to be Solved) In order to deal with such inconveniences, it is an object of the present invention to provide a dust removal device that can effectively remove dust adhering to the surface of a chargeable member having a complex surface shape. .

(Means for Solving the Problem) In order to achieve the above object, the present invention generates air ions having a polarity opposite to the polarity with which a chargeable object is charged by corona discharge, and uses the air ions to charge the chargeable object. In a dust removal device that eliminates static electricity and removes dust by blowing air onto the surface of the charged object, a support that supports the charged object is provided with an air outlet that opens opposite to the surface of the charged object. a ground electrode provided near the air outlet, and a discharge electrode that forms a discharge region that generates air ions by generating corona discharge between the ground electrode and the ground electrode;
an air nozzle device rotatably equipped with a plurality of air nozzles facing the surface of the chargeable object at different angles through the air outlet and the discharge area;
The air nozzle device is characterized by comprising a rotational drive means for rotationally driving each air nozzle of the air nozzle device to change the direction in which air is blown onto the surface of the chargeable object by each air nozzle.

(Operation) In this means, each air nozzle of the air nozzle device of the present invention blows air together with ionized air generated by the discharge electrode from various angles and directions onto the surface of the chargeable object.

(Example) An embodiment of the present invention will be explained in detail based on the drawings.

In FIG. 1, 1 is a dust removal device, 2 is a plurality of discharge electrodes, 3 is an air nozzle device consisting of a pair of air nozzles 3a, 3a, and 4 is a high voltage power source.

The dust removal device 1 has a housing shape, and an air outlet 5 is provided on the upper wall of the device 1, and a metal finger guard 6 that is grounded through the dust removal device 1 is connected to the air outlet 5. is fixed along the outer periphery of the The finger guard 6 is provided above the air outlet 5 as a support portion for supporting the member A, which is a chargeable object, and is also used as a ground electrode by being grounded.

Further, as shown in the second diagram, the discharge electrode 2 is made by applying an insulating coating 8 to a high voltage core wire 7, wrapping a metal coil 9 around it, and capacitively coupling it with the high voltage core wire 7, and connecting one end of the coil 9. It is constructed by extending and bending inside the air outlet 4.

The metal coil 9 of the discharge electrode 2 is fitted into the U-shaped groove of the insulating material 10 together with the high voltage core wire 7 and the insulation coating 8.

Moreover, each air nozzle 3 of the air nozzle device 3
a and 3a are attached to the attachment member 11 at different blowing angles. The member 11 has a hollow portion communicating with each nozzle 3a, 3a, and is screwed into a cylindrical member 12 having a hollow portion having the same diameter as the member 11. The cylindrical member 12 is attached to the side wall 1 of the dust removal device 1.
A drive gear 16 is rotatably supported around the central axis of the member 12 by support members 13 and 14 fixed to the support member 14, and is driven by a motor 15, which is a rotational drive means fixed to the support member 14; It rotates via a fixed gear 17 provided on the outer periphery of the member 12.

Further, the cylindrical member 12 communicates with a compressed air supply pipe 21 via a hollow rotary joint 18 and a hollow connecting member 20 rotatably connected to the joint 18 via a bearing 19.

Note that the connecting member 20 is fixed to the lower wall 1b of the dust removal device 1 by a supporting member 22.

Therefore, when an AC high voltage is applied to the discharge electrode 2 from the high voltage power supply 4 via the cable 23,
Corona discharge occurs between the dust removal device 1 and the finger guard 6 which is grounded, and the air existing in the space where the discharge occurs is ionized. This ionized air is entrained by the compressed air blown out from each air nozzle 3a, 3a through the air pipe 21, and blown onto the surface of member A, which is a charged object, placed in front of the air outlet 5. As a result, static electricity on the chargeable member A can be neutralized, and dust attached to the surface of the member A can be removed.

Furthermore, even if the surface of the member A is complex, while each air nozzle 3a, 3a rotates,
Moreover, since air is blown onto the surface of member A along with ionized air at different angles, the member A
Since the dust is blown onto the surface of the member A at various angles and directions, dust on the surface of the member A can be efficiently removed.

Note that the air nozzle device of the present invention may be configured to rotate only a portion where a plurality of nozzles are assembled.

(Effect) Therefore, according to the present invention, each air nozzle of the air nozzle device blows air together with ionized air generated by the discharge electrode from various angles and directions onto the surface of the chargeable object. It is possible to provide a dust removal device that can effectively remove dust adhering to the surface of a chargeable member having a surface shape.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line A-A' in FIG. DESCRIPTION OF SYMBOLS 1... Dust removal device, 2... Discharge electrode, 3... Air nozzle device, 3a, 3a... Air nozzle, 11...
... Mounting member, A... Chargeable object.

Claims (1)

[Scope of utility model registration request] Air ions with a polarity opposite to the polarity with which the chargeable object is charged are generated by corona discharge, and the chargeable object is neutralized by the air ions, and dust is removed by blowing air onto the surface of the chargeable object. A dust removal device comprising: a support part that supports the chargeable object and includes an air outlet opening facing the surface of the chargeable object; a ground electrode provided near the air outlet; rotating a discharge electrode forming a discharge region that generates air ions by generating corona discharge between the two, and a plurality of air nozzles each facing the surface of the chargeable object at different angles through the air outlet and the discharge region; The present invention is characterized in that it comprises an air nozzle device which can be freely provided, and a rotational drive means which rotationally drives each air nozzle of the air nozzle device to change the direction in which air is blown onto the surface of the chargeable object by each air nozzle. Dust removal equipment.