JP2000286032A - Corona discharge treatment device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent deformation due to thermal expansion of a discharge electrode for each individual discharge electrode, to reliably eliminate processing unevenness due to deformation of the discharge electrode, and to position the discharge electrode away from the earth roll. Provided is a corona discharge treatment device that can be easily retracted. SOLUTION: Each discharge electrode 7 is slidably held in each of a plurality of electrode holders 6 in a longitudinal direction. A plurality of electrode holders 6 are fixed to a common swing shaft 5, and the swing shaft is connected to a piston rod 16a of an air cylinder 16 for electrode swing. And a retracted position separated from the earth roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corona discharge treatment apparatus for modifying the surface of a processed material such as a film, and more particularly to a corona discharge treatment apparatus comprising a plurality of long discharge electrodes held in parallel by a plurality of electrode holders and an earth roll. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corona discharge treatment apparatus that generates a corona discharge therebetween to modify the surface of a processed material such as a film guided on an earth roll.

[0002]

2. Description of the Related Art In a corona discharge treatment apparatus of this type, if the discharge electrode expands and deforms due to heat generated by the discharge, the distance between the discharge electrode and the earth roll changes with the elapse of the treatment time, causing variations in the treatment. The film to be treated is caught on the discharge electrode, and there is a problem that the removal process reduces productivity or causes a failure.

Therefore, a method of cooling the discharge electrode or the like is generally adopted. However, in Japanese Patent Application Laid-Open No. Hei 6-163143, the electrode support structure is designed as follows to cope with thermal expansion of the discharge electrode. You are.

That is, a convex portion having a trapezoidal cross section is formed on a side surface of a root portion of an electrode holder holding a plurality of discharge electrodes arranged in parallel, and the convex portion is formed on an electrode support portion on an inner surface of an exhaust cover. In this configuration, thermal expansion is absorbed between an electrode holder which holds a plurality of discharge electrodes and which is slidably fitted in the dovetail groove, and an electrode support on the inner surface of the exhaust cover.

[0005]

However, this is a form in which the thermal expansion of the electrode holder which holds the plurality of discharge electrodes collectively, not the individual electrodes of the plurality of discharge electrodes, is absorbed. Due to the difference in thermal expansion between the holder and the difference in thermal expansion between the discharge electrodes, deformation unevenness occurs between the discharge electrodes.

When the film is hooked on the discharge electrode and removed, or when the discharge electrode is separated from the ground roll to clean or replace the discharge electrode, the discharge electrode and the electrode holder are easily retracted. I can't let it.

Accordingly, an object of the present invention is to prevent the deformation of the discharge electrode due to thermal expansion for each discharge electrode, thereby reliably eliminating the processing unevenness due to the deformation of the discharge electrode.
An object of the present invention is to provide a corona discharge treatment device that can easily retreat a discharge electrode to a position separated from an earth roll.

Another object of the present invention is to prevent the problem of insulation caused when the discharge electrode is retracted.

[0009]

According to the present invention, a corona discharge is generated between a plurality of long discharge electrodes held in parallel by a plurality of electrode holders spaced at a predetermined interval and an earth roll. In a corona discharge treatment device that modifies the surface of a treatment object guided on an earth roll, each discharge electrode is slidably held in a longitudinal direction with respect to each electrode holder, and a plurality of electrode holders are shared by a common swing. A plurality of discharge electrodes are fixed to a shaft, and the plurality of discharge electrodes can be switched between an operation position facing the ground roll and a retracted position separated from the ground roll by rotation of the swing shaft.

The swing shaft is connected to the piston rod of the electrode swing air cylinder, and the operation of the electrode swing air cylinder causes the plurality of discharge electrodes to move to an operation position facing the earth roll and a retracted position separated from the earth roll. When the switching displacement can be performed, the plurality of discharge electrodes can be automatically retracted.

[0011] A height adjusting mechanism for adjusting the height of the swing axis with respect to the earth roll, and a movable stopper for adjusting the rotation stop position of the electrode holder for adjusting the operation position where the discharge electrode faces the earth roll. Then, the gap between the discharge electrode and the earth roll can be adjusted.

When an air pressure circuit for switching the air pressure to the electrode swing air cylinder from a low pressure to a high pressure and displacing the discharge electrode to the retreat position when the discharge electrode is moved from the action position by an external force is provided, the processed material is solidified. In a case where the discharge electrode collides with the discharge electrode in this state, it is possible to prevent the discharge electrode and the like from being broken.

When the discharge electrode and the swing axis are electrically connected to have the same potential, discharge between the discharge electrode and the swing axis can be prevented.

[0014]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

This corona discharge treatment apparatus is shown in FIGS.
As shown in the overall configuration in FIG.
b, the ground roll 2 is supported horizontally so as to be freely rotatable, and a conductive swing (electrically insulated) is provided between the left and right side plates 3 suspended from the upper frame 1c via insulators 4 on the left and right sides. The shaft 5 is supported horizontally, and a plurality of electrode holders 6 made of an electrically insulating material are fixed to the swing shaft 5 at a predetermined interval, and a plurality of rod-shaped discharge electrodes 7 are fixed by the plurality of electrode holders 6. Are held horizontally and parallel as follows.

As shown in FIG. 3 (cross section taken along the line AA in FIG. 1) and FIG. 4 (cross section taken along the line BB in FIG. 1), each of the discharge electrodes 7 has a spherical upper cross section. The lower half has an inverted U-shaped cross section,
The upper half of the spherical cross section is slidably penetrated into a concave portion 6a having the same cross section formed on the arc-shaped lower surface of the electrode holder 6, and is individually held. In the example of the figure, five discharge electrodes 7
Are parallel to each other at equal intervals and are penetrated and held in the respective recesses 6 a in the same manner. The bifurcated tips of these five discharge electrodes 7 are arranged along an arc line centered on the rotation axis of the earth roll 2. Thus, the same gap is maintained with respect to the outer surface of the earth roll 2.

As shown in FIGS. 4, 5 and 6, the swing shaft 5 is held on the left and right side plates 3 by left and right bearing blocks 8 fitted to the left and right ends thereof. In order to adjust the height of the swing shaft 5, each bearing block 8 is attached to the side plate 3 by bolts 10 through bolts 10 through vertically long holes 9a provided at four positions of the vertical mounting plate 9. It can be moved up and down slightly.

Further, in order to finely adjust the height of the swing shaft 5, as shown in FIGS. Handle 11
A height adjustment screw 11 having a is vertically mounted.
The height adjustment screw 11 penetrates the upper frame portion 1c up and down,
The lower end of each height adjustment screw 11 is an insulator 1 for electrical insulation.
It is connected to the swing shaft 5 through the bearing 2 and the bearing joint 13.

To finely adjust the height of the swing shaft 5, the height adjustment screw 11 is turned to read the height of the reading disk 14 on the scale 15, as shown in FIGS.
The reading height of the reading disk 14 of all the height adjusting screws 11 is set to be the same.

The left and right ends of the swing shaft 5 are connected to the left and right electrode swing air cylinders 16 by the following crank link mechanism. That is, as shown in FIGS. 4 to 6, the crank arms 17 fixed to the left and right ends of the swing shaft 5 are connected to the piston rods 16a of the left and right air cylinders 16 with pins. The swing shaft 5 is supported by a cylinder table 18 fixed to the first side plate 3 so as to be vertically swingable, and the piston rods 16a of the left and right air cylinders 16 simultaneously expand and contract.

As described above, the plurality of electrode holders 6 holding the five discharge electrodes 7 in parallel are provided with the same swing axis 5.
Therefore, all the electrode holders 6 are integrally rotated by the rotation of the swing shaft 5, and when the piston rod 16a contracts as shown in FIG.
Is set at an operation position facing the earth roll 2 with a predetermined gap. When the piston rod 16a is extended as shown in FIG.
Is set at a retracted position separated upward from the earth roll 2.

For example, the films are gathered together to form a block shape due to, for example, a conveyance obstacle of the film to be processed. If the films collide with the discharge electrodes 7 in this state, the discharge electrodes 7 and the like are damaged.
In such a case, the electrode holder 6 is rotated against the air pressure acting on the air cylinder 16 by the external force applied to the discharge electrode 7, and accordingly, the piston of the air cylinder 16 is also forced against the air pressure. Slid.

Therefore, a mechanism for detecting the sliding of the piston in such a case and automatically retracting the discharge electrode 7 to the retracted position shown in FIG. 5 is incorporated. That is, at a predetermined position on the outer peripheral surface of the air cylinder 16, a retracting position confirmation sensor 19 such as a proximity switch that detects the internal piston forcibly sliding as described above without contacting the piston is provided. Have been. The air cylinder 16 is shown in FIG.
It is operated by a pneumatic circuit as shown in FIG.

The air pressure from the air pressure source 30 is branched into a high pressure and a low pressure by a high pressure reducing valve 31 and a low pressure reducing valve 32. One of high pressure and low pressure is selected. The supply and discharge of the air cylinder 16 to the head side and the rod side are switched by the discharge electrode position switching electromagnetic valve 34.

When the discharge electrode 7 is set at the operation position shown in FIG. 4, the high pressure side is selected by the high pressure / low pressure switching solenoid valve 33.
a performs a contraction operation at a high pressure. When the rotation of the electrode holder 6 is stopped as described later and the discharge electrode 7 is set to the operating position, the high-pressure / low-pressure switching solenoid valve 33 is automatically moved to the low-pressure side after a set time by the action of the timer. Switch. Therefore, after the discharge electrode 7 is set to the operation position, low air pressure is applied to the piston rod 16a.

In such a state, when the piston of the air cylinder 16 is forcibly slid against the low air pressure by the external force applied to the discharge electrode 7 and detected by the retracted position confirmation sensor 19, The high-pressure / low-pressure switching solenoid valve 33 is automatically switched to the high pressure side, and the discharge electrode position switching solenoid valve 34 is also automatically switched.
Are immediately moved to the retreat position shown in FIG.

When the height of the swing shaft 5 is finely adjusted as described above, the stop position of the rotation of the electrode holder 6 at the operating position of the discharge electrode 7 is also finely adjusted. A movable stopper 22 using a bolt is screwed to a nut 21 fixed and fixed to the side plate 3 of the machine frame 1. When the piston rod 16a of the air cylinder 16 contracts and the tip of the stop arm 20 abuts on the tip of the movable stopper 22, the swing shaft 5 cannot rotate any more. Fine adjustment can be made at 22.

According to the present invention, a plurality of electrode holders 6 made of an electrically insulating material for holding the discharge electrodes 7 are fixed to one long swing shaft 5 like the discharge electrodes 7. And the discharge electrode 7 are held at a fixed interval by the electrode holder 6, but the discharge electrode 7
There is a possibility that the insulation between the electrode and the swing axis 5 will be broken down and discharge will occur from the discharge electrode 7 toward the swing axis 5.

Therefore, in order to prevent this, the swing shaft 5 is made conductive and this is electrically connected to the discharge electrode 7 by the conducting wire 24 as shown in FIG. 7, and the swing shaft 5 is connected to the insulator 4 as described above. The discharge electrode 7 and the swing shaft 5 are supported at the same potential through the support 12.

The swing shaft 5 may be manually rotated by using a lever or the like.

[0031]

As described above, according to the present invention, since each discharge electrode is held slidably in the longitudinal direction with respect to each electrode holder, deformation of each discharge electrode due to thermal expansion can be individually prevented. In addition, processing unevenness due to deformation of the discharge electrode can be reliably eliminated.

Further, a plurality of electrode holders are fixed to a common swing shaft, and the rotation of the swing shaft allows a plurality of discharge electrodes to be switched between an operation position facing the earth roll and a retracted position separated from the earth roll. Therefore, the discharge electrode can be easily retracted to a position separated from the ground roll, and the work of removing the film when the film is hooked on the discharge electrode, and the work of cleaning and replacing the discharge electrode can be easily performed.

According to the second aspect of the present invention, the plurality of discharge electrodes are automatically switched and displaced between the operation position facing the ground roll and the retracted position separated from the ground roll by operating the air cylinder. Can be.

According to the third aspect of the invention, the gap between the discharge electrode and the earth roll can be adjusted.

According to the fourth aspect of the present invention, when the discharge electrode is moved from the operating position by an external force, the air pressure to the air cylinder for electrode swing is switched from a low pressure to a high pressure to displace the discharge electrode to the retracted position. When a circuit is provided, it is possible to prevent breakage of the discharge electrode and the like when the processed object collides with the discharge electrode in a solidified state.

According to the fifth aspect of the present invention, even if a plurality of electrode holders are fixed to a common swing axis, dielectric breakdown occurs between the swing axis and the discharge electrode, so that the discharge axis extends from the discharge electrode toward the swing axis. Discharge can be prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an entire corona discharge device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged cross-sectional view taken along a line AA in FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a sectional view of the same as above in a state where a discharge electrode is displaced to a retracted position.

FIG. 6 is a partial front view showing a support structure at a right end portion of a swing shaft.

FIG. 7 is a partial perspective view showing a relationship between a swing axis and a discharge electrode.

FIG. 8 is a circuit diagram of a pneumatic system that operates an electrode swing air cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine frame 2 Earth roll 5 Swing axis 6 Electrode holder 7 Discharge electrode 11 Height adjustment screw 16 Air cylinder for electrode swing 16a Piston rod 20 Stop arm 21 Movable stopper

[Procedure amendment]

[Submission date] January 27, 2000 (2000.1.2
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

According to the present invention, a corona discharge is generated between a plurality of long discharge electrodes held in parallel by a plurality of electrode holders spaced at a predetermined interval and an earth roll. A corona discharge treatment apparatus for modifying the surface of a treatment object guided on an earth roll is characterized as follows.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010] A plurality of electrode holders are fixed at a required interval to one horizontally supported swing axis. This swing shaft is connected to a piston rod of an air cylinder for electrode swing by a crank link mechanism, and the swing shaft is rotated by expansion and contraction of the piston rod, thereby simultaneously rotating a plurality of electrode holders, thereby providing a plurality of discharges. The electrode can be switched and displaced between an operation position where the electrode is discharged facing the earth roll with a predetermined gap and a retracted position which is separated from the earth roll.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction contents]

Further, the plurality of discharge electrodes can be automatically and immediately switched to a working position facing the ground roll and a retracted position separated from the ground roll by operating the air cylinder.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

According to the second aspect of the invention, the gap between the discharge electrode and the earth roll can be adjusted.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

According to the third aspect of the present invention, when the discharge electrode is moved from the operating position by an external force, the air pressure to the air cylinder for electrode swing is switched from a low pressure to a high pressure to displace the discharge electrode to the retracted position. When a circuit is provided, it is possible to prevent breakage of the discharge electrode and the like when the processed object collides with the discharge electrode in a solidified state.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

According to the fourth aspect of the present invention, even if a plurality of electrode holders are fixed to a common swing axis, dielectric breakdown occurs between the swing axis and the discharge electrode, so that the swing axis extends from the discharge electrode toward the swing axis. Discharge can be prevented.

Claims (5)

[Claims] 1. A corona discharge is generated between a plurality of long discharge electrodes held in parallel by a plurality of electrode holders at predetermined intervals and an earth roll to be guided on the earth roll. In the corona discharge treatment apparatus for modifying the surface of the treated object, each of the discharge electrodes is slidably held in the longitudinal direction with respect to each of the electrode holders, and a plurality of electrode holders are fixed to a common swing axis. A corona discharge treatment device wherein the plurality of discharge electrodes can be switched between a working position facing the ground roll and a retracted position separated from the ground roll by rotation of a swing shaft. 2. A swing shaft is connected to a piston rod of an electrode swing air cylinder, and a plurality of discharge electrodes are actuated to oppose an earth roll by an operation of the electrode swing air cylinder, and a retracted position is separated from the earth roll. 2. The corona discharge treatment device according to claim 1, wherein the corona discharge treatment device is configured to be capable of being switched and switched. 3. A height adjusting mechanism for adjusting a height of a swing axis with respect to an earth roll, and a movable stopper for adjusting a rotation stop position of an electrode holder for adjusting an operation position where a discharge electrode faces the earth roll. The corona discharge treatment device according to claim 2, further comprising: 4. An air pressure circuit for switching an air pressure to an electrode swing air cylinder from a low pressure to a high pressure and displacing the discharge electrode to a retracted position when the discharge electrode is moved from an operation position by an external force. The corona discharge treatment device according to claim 2 or 3, wherein the corona discharge treatment device is used. 5. The corona discharge treatment apparatus according to claim 1, wherein the discharge electrode and the swing axis are electrically connected to have the same potential.