JPH06254522A - Destaticizing dust collector - Google Patents

Abstract

PURPOSE:To enhance a dust collecting effect in the dust collector contg. plural chargeable bodies in a rotary cylinder and removing dust from the bodies by the air ion generated by a corona discharge while agitating the bodies by placing an elastic contact member in a rotary housing. CONSTITUTION:When dust is removed from a chargeable body such as a plastic and ceramic on which dust is electrostatically deposited, a chargeable body A and a freely elastically deformable contact member B are charged into a rotary cylinder 3 respectively from first and second inlets 8 and 9, and the cylinder 3 is rotated. Consequently, both the bodies A and member B are agitated, moved toward the downstream side from the upstream side and brought into contact with each other. At this time, positive and negative air ions are liberated from a discharge electrode 4 to neutralize the charges of the body and dust deposited thereon, and the adhesion of dust to the body A is weakened. Under such conditions, the dust is blown off by the compressed air blown from an air nozzle 5, and the dust is sucked into a suction duct 28 and removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static elimination type dust remover for removing dust from electrostatically charged objects such as plastic and ceramics to which dust is electrostatically attached.

[0002]

2. Description of the Related Art Chargeable objects such as plastics and ceramics are subjected to a coating treatment after removing dust adhering electrostatically. The reason why the coating process is performed after removing the dust is that the appearance of the product deteriorates if the coating process is performed while the dust remains attached.

Conventionally, as a device for removing the dust from a chargeable object, required positive and negative air ions are released by corona discharge into a space in which a plurality of chargeable objects are accommodated, thereby charging the chargeable object. The electrostatic charge is neutralized to weaken the adhesion force of dust to the charged object, and in this state, air is blown by an air nozzle or the like to separate the dust from the charged object, and the separated dust is collected by a suction duct or the like. A static elimination type dust remover is known.

However, the above static elimination type dust remover is
It is effective for removing dust adhering to flat-shaped electrified objects such as films and sheets, but when removing dust adhering to electrified objects having a complicated surface shape, it is blown from the above-mentioned air nozzle, etc. Since the applied air does not reach every corner of the electrostatically charged object, there is a problem in that dust cannot be satisfactorily removed from the electrostatically charged object. Also, dust is not limited to being attached to static electricity by static electricity, but it may be firmly attached by other physical forces.In such a case, the air blown from the air nozzle, etc. However, even if every part of the charged object is thoroughly covered, dust may remain attached to the charged object.

Therefore, in order to solve such a problem, a plurality of charging bodies are housed inside a rotating cylinder, and the rotating cylinder is rotated to agitate the charging bodies while stirring the inside of the rotating cylinder. The necessary positive and negative air ions are released by the corona discharge described above, and air is blown toward the charged object by an air nozzle or the like to separate the dust adhering to the charged object, and the separated dust is collected by a suction duct or the like. A static elimination type dust removing device has been proposed.

In this static eliminator, since a plurality of chargeable objects are agitated inside the rotary cylinder, the chargeable objects are in contact with each other and firmly adhered to the chargeable objects. Is in a state of leaving or easy to leave,
As a result of stirring, the position of each chargeable object changes variously with respect to the blowing direction of the air from the air nozzle, etc. As a result, air is blown to every corner of the chargeable object, which causes the chargeable object. Dust is removed from the.

However, in this static eliminator, since the chargeable object is a relatively hard material such as plastic or ceramics, each chargeable object is agitated by stirring a plurality of chargeable objects inside the rotary cylinder. When contacting each other, it is not possible to secure a sufficient contact area, and therefore dust that has strongly adhered to each charging object cannot be separated or easily separated. There is an inconvenience that the dust cannot be removed well.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate such inconvenience, and an object of the present invention is to provide a static eliminator that can satisfactorily remove dust adhering to a chargeable object. And

[0009]

In order to achieve such an object, the present invention stirs a plurality of chargeable objects by accommodating and rotating a plurality of chargeable objects to which dust is electrostatically attached. A rotary container for rotating, the rotating means for rotating the rotary container, a discharge electrode for releasing positive and negative air ions necessary for neutralizing the charge of the charging object into the rotary container, Air ejection means for blowing air toward the chargeable object to remove the dust adhering to the chargeable object when the air ions are released into the rotary container, and to remove from the chargeable object. In a static elimination type dust remover comprising a collecting means for collecting the collected dust, an elastically deformable contact member is mixed with the plurality of charging bodies inside the rotary container. And .

Further, according to the present invention, the rotary container is formed in a cylindrical shape, and the upstream side is tilted upward to be inclined so that the charging body and the contact member flow from the upstream side to the downstream side. A charging unit for charging the charging object and the contact member is provided inside the rotation container on the upstream side of the rotation container, and the charging object and the contact member are taken out on the downstream side, respectively. First and second take-out parts are provided, and the chargeable body and the contact member are separated between the first and second take-out parts and the downstream side of the rotary container to separate the chargeable body from the chargeable body. It is characterized in that a sorting means is provided for feeding the contact member to the second take-out portion while feeding the contact member to the first take-out portion.

[0011]

According to the present invention, when the rotatable container is rotated to agitate the chargeable object and the contact member, the chargeable objects and the chargeable object and the contact member contact each other. At this time, since the contact member elastically deforms when contacting the chargeable object and contacts along the shape of the chargeable object, the chargeability is higher than that in the conventional case where the chargeable objects are contacted with each other. The amount of dust that separates from the object and the amount of dust that easily separates from the object increases.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall schematic view of a static eliminator type dust remover which is an example of an embodiment of the present invention, and FIG.

Referring to FIGS. 1 and 2, the static elimination type dust remover 1 includes an outer box 2, a rotating cylinder 3 arranged in the outer box 2, and a discharge electrode 4 arranged in the rotating cylinder 3. Further, the air nozzle device 5 and the collecting means 6 connected to the outer box 2 so as to communicate with the inside of the rotating cylindrical body 3 are provided.

The outer box 2 is supported on a pedestal 7 with its right end portion tilted obliquely upward to the right, and the right end wall thereof has a charging cylinder A and a charged object A with dust adhering inside the rotary cylinder 3. A first charging unit 8 for charging each spherical (or dice-shaped) contact member B made of an elastic material such as a soft urethane foam material.
And a second charging section 9 are provided.

First, the charging body A and the contact member B are taken out from the rotary cylinder 3 at the bottom of the outer box 2 on the left end side.
An extraction unit 10 and a second extraction unit 11 are provided. Second
The take-out section 11 is connected to the second feeding section 9 via the belt conveyor 12.
, So that the contact member B is continuously put into the inside of the rotary cylinder 3. In the figure, reference numeral 13 is a drive device for driving the belt conveyor 12.

On the right side of the first take-out section 10 at the bottom of the outer box 2, there is provided a third take-out section 14 for taking out relatively large deposits (described later) that cannot float in the air. Inside the outer box 2, the charging object A and the contact member B, which are charged from the first charging section 8 and the second charging section 9 by being rotated, are agitated to charge the charging objects A and the charging object A to each other. A rotary cylinder 3 is arranged to bring the contact member B into contact with each other.

The rotary cylinder 3 is arranged with its right end portion slightly inclined to the upper right so that the chargeable object A and the contact member B flow from the right end portion (upstream side) to the left end portion (downstream side). The long wire mesh cylinder portion 15 and the wire mesh cylinder portion 1 are provided.
Short support cylinder part 1 connected to the left and right ends of 5, respectively
6 and 17, and a lattice cylinder portion 18 (sorting means) connected to the support cylinder portion 16 on the left end side.

A plurality of stirring plates 19 extending in the axial direction are provided at a predetermined interval in the circumferential direction on the inner peripheral portion of the wire mesh cylindrical portion 15, and these stirring plates 19 rotate the rotating cylindrical body 3. At times, the chargeable object A and the contact member B are lifted as much as possible and dropped to increase the chances of contact between the chargeable objects A and between the chargeable object A and the contact member B.

The supporting cylindrical portions 16 and 17 are respectively supported by rotating rollers 20 and 21, and the rotating cylindrical body 3 is rotated by rotating the rotating rollers 20 and 21 by a driving device (not shown).

The lattice of the lattice cylinder portion 18 allows the chargeable object A to pass through, but prevents the contact member B from passing through. Therefore, the chargeable object A that has moved inside the rotary cylinder 3 to the downstream side is First through the grid and falling
The contact member B that has been sent to the take-out section 10 and has moved to the downstream side passes through the lattice cylindrical section 18 and falls from the opening on the left end side of the rotary cylindrical body 3 and is sent to the second take-out section 11.

The discharge electrode 4 generates a corona discharge inside the rotating cylinder when the charging object A and the contact member B are stirred, so that the charging charges of the charging object A and the dust adhering to the charging object A are generated. It is for releasing positive and negative air ions necessary for the summing, and extends above the inside of the rotary cylinder 3 along the axial direction of the rotary cylinder 3. Discharge electrode 4
Is a high voltage power supply 22 and a high voltage cable 23
Therefore, by applying a high voltage from the high-voltage power supply 22 to the plurality of discharge needles 24 of the discharge electrode 4, corona discharge is generated inside the rotating cylindrical body 3 and the positive and negative air described above is generated. Ions are ejected.

The air nozzle device 5 is for ejecting compressed air to separate adhering dust from the charging object A when the air ions are discharged into the rotary housing 3, and It extends downward along the axial direction of the rotary cylinder 3. The air nozzle device 5 is connected to an air supply device 25 provided outside via a supply pipe 26. Therefore, the air nozzle device 5 is connected to the air nozzle device 5 from the air supply device 25.
By sending compressed air to the multiple air nozzles 2
Compressed air is discharged from the inside of the rotating cylindrical body 3.

The collecting means 6 is for collecting dust (which will be described later) floating inside the rotary cylinder 3 to the outside, and the first charging section 8 and the second charging section on the right end wall of the outer box 2. Part 9
A suction duct 28, one end of which is connected to the inside of the rotating cylindrical body 3 so as to communicate therewith, is provided between the two. The other end of the suction duct 28 is connected to a dust collector 29, and by operating the dust collector 29, dust floating inside the rotary cylinder 3 is collected to the outside.

Thus, in order to remove dust adhering to the chargeable object A, the chargeable object A and the contact member B are respectively introduced from the first charging section 8 and the second charging section 9 into the rotary cylinder 3. It is charged and the rotary cylinder 3 is rotated. Then, the chargeable object A and the contact member B move from the upstream side to the downstream side while being stirred inside the rotating cylindrical body 3, and the chargeable objects A and the chargeable object A and the contact member B come into contact with each other. .
At this time, since the contact member B is formed of an elastic material such as a soft urethane foam material, it elastically deforms when contacting with the charging object A and comes into contact with the charging object A in a shape along the charging object A.
It is possible to increase the amount of dust that separates from the chargeable objects A and the amount of dust that easily separates from the chargeable objects A as compared with the case where the chargeable objects A are brought into contact with each other as in the conventional case.

When the charging object A and the contact member B are agitated, positive and negative air ions are released by the discharge electrode 4 into the inside of the rotating cylindrical body 3 to charge the charging object A and the charging object A.
The electrostatic charge of the dust adhering to is neutralized, so that the adhesive force of the dust to the charging object A is weakened. The dust whose adhesion is weakened is blown away by the compressed air blown from the air nozzle 27 of the air nozzle device 5 and is separated from the charging object A. At this time, since the charging object A is agitated, its position changes variously with respect to the blowing direction of the compressed air from the air nozzle 27, and as a result, air is blown to every corner of the charging object A. To be

Further, among the dust particles separated from the electrostatically charged object A, the dust particles floating in the air are sucked from the suction duct 28 and collected by the dust collector 29, and the relatively large dust particles that cannot float in the air are caught in the wire mesh cylindrical portion 15. After being dropped through the mesh of No. 1, sent to the third take-out unit 14, it is recovered by the recovery device 30.

Then, the charged object A, which has been cleaned by removing the adhered dust, moves to the downstream side, passes through the lattice at the position of the lattice cylindrical portion 18, falls and is sent to the first take-out portion 10. After that, it is recovered by the recovery device 31. On the other hand, the contact member B that has moved to the downstream side passes through the lattice cylindrical portion 18 and then falls from the opening on the left end side of the rotating cylindrical body 3 to be sent to the second take-out portion 11, and thereafter, through the belt conveyor 12. 2 It is re-introduced into the insertion section 9. At this time, the new charging object A from which the adhering dust is to be removed is introduced from the first charging section 8, and therefore, the dust adhering to the charging object A can be continuously removed.

The present invention is not limited to the above embodiments, but can be modified as appropriate without departing from the gist of the present invention. For example, in the above embodiment, the second take-out section 1
The contact member B sent to No. 1 is re-input to the second input port 9 via the belt conveyor 12, but instead of this,
An air discharge device (not shown) is arranged on the downstream side of the rotary cylinder 3, and when the contact member B reaches the downstream side of the rotary cylinder 3, compressed air is applied to the contact member B by the air discharge device. It is also possible to blow it back to the upstream side, and when a compression spring (not shown) is arranged on the downstream side of the rotary cylinder 3 and the contact member B reaches the downstream side of the rotary cylinder 3. Moreover, it is also possible to repel it to the upstream side by the elastic force of the compression spring.

Further, in the above embodiment, the recovery means 6 is
The suction duct 28 has one end connected to the outer box 2 and the dust collector 29 connected to the end of the suction duct 28. Instead of this, as shown in FIG. A blower 32 is provided on the left side wall, and after the floating dust inside the rotating cylindrical body 3 is sucked by the blower 32, the sucked floating dust is attached to the left end wall side of the box body 2 so as to be integrated with the box body 2. It is also possible to remove only the purified air by removing it at 33.

Further, in the above embodiment, the charging object A and the contact member B are charged into the inside of the rotary cylinder 3 from the first and second charging sections 8 and 9, respectively, and the charging object A and the contact member B are charged. After moving from the upstream side to the downstream side, the lattice cylindrical portion 1
The chargeable object A and the contact member B are separated at 8, and the separated chargeable object A and the contact member B are taken out from the first and second take-out portions 10 and 11, respectively, to obtain the chargeable object A.
The dust adhering to the sheet is continuously removed, but instead of this, a so-called batch type in which the charging object A and the contact member B are put in and taken out every time is carried out. It is also possible.

Further, in the above-mentioned embodiment, the chargeable object A and the contact member B are separately charged into the inside of the rotary cylinder 3 from the first and second charging sections 8 and 9, but instead of this, It is also possible to simultaneously charge the chargeable object A and the contact member B into the inside of the rotating cylindrical body 3 from one charging section.

Further, in the above embodiment, the elastic member made of soft urethane foam is used as the contact member B.
Instead of this, it is also possible to use a scissor-shaped one in which nylon brushes are bundled.

[0033]

As is apparent from the above description, according to the present invention, the contact member is elastically deformed when coming into contact with the chargeable object and comes into contact with the shape of the chargeable object. As compared with the case where the chargeable objects are in contact with each other, the amount of dust that separates from the chargeable objects and the amount of dust that easily separates from the chargeable objects can be increased. The attached dust can be satisfactorily removed.

In addition, after charging the chargeable object and the contact member into the inside of the rotary container from the charging section and moving the chargeable object and the contact member from the upstream side to the downstream side, the charging means and the contact member are separated by the separating means. Since the members are separated and the separated chargeable object and the contact member are taken out from the first and second take-out portions, respectively, even if the contact members are mixed, only the chargeable object can be taken out efficiently. .

[Brief description of drawings]

FIG. 1 is an overall schematic view of a static elimination type dust remover which is an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view of an essential part showing another embodiment of the present invention.

[Explanation of symbols]

1 ... Static eliminator type dust remover, A ... Chargeable object, B ... Contact member,
3 ... Rotating cylinder, 4 ... Discharge electrode, 5 ... Air nozzle device,
6 ... Recovery means, 8 ... First charging section, 9 ... Second charging section, 10
... 1st take-out part, 11 ... 2nd take-out part, 18 ... Lattice cylindrical part,
21,22 ... Rotating rollers

Claims (2)

[Claims] 1. A rotary container for agitating the plurality of chargeable objects by accommodating and rotating the plurality of chargeable objects to which dust is electrostatically attached, and a rotating means for rotating the rotary container. A discharge electrode for releasing positive and negative air ions necessary to neutralize the charged electric charge of the charging object into the inside of the rotary container, and when the air ions are released inside the rotary container. A static eliminator provided with an air ejecting unit that blows air toward the charging object to remove the dust adhering to the charging object, and a collection unit that collects the dust removed from the charging object. In the dust remover, a static elimination dust remover in which a contact member that is elastically deformable is mixed with the plurality of chargeable objects inside the rotary container. 2. The rotation container is formed in a tubular shape, and the charging member and the contact member are inclinedly arranged with the upstream side tilted upward so as to flow from the upstream side to the downstream side. On the upstream side of the container, a charging unit for charging the charging object and the contact member is provided inside the rotary container,
First and second take-out portions for taking out the charging object and the contact member, respectively, are provided on the downstream side, and the charging property is provided between the first and second taking-out portions and the downstream side of the rotary container. The separation means for separating an object and the contact member to send the chargeable object to the first take-out portion and to send the contact member to the second take-out portion is provided. Static eliminator type dust remover.