JP2024008724A - Discharge treatment apparatus and sheet material treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge treatment apparatus capable of preventing occurence of a tracking phenomenon on an upper surface of an inter-electrode top guide member, while aiming the improvement of maintenance property.

SOLUTION: A corona treatment apparatus 26 comprises: at least one pair of application electrodes 110 that are arranged above a transport path 120 and have a potential difference with each other; and a ground electrode 112 that is opposite to the application electrode 110 below the transport path 120. Between the application electrode 110 and the ground electrode 112, discharge is caused to apply discharge treatment to a sheet material. The corona treatment apparatus comprises: an upper guide plate 109 arranged between an upstream side application electrode 110a and a down stream side application electrode 110b of the application electrodes 110 and forming an above portion of the transfer passage 120; and an insulative guide upper surface wall part 101 that protrudes upwards from a top surface of the upper guide plate 109, and partitions the upper surface into an area on a side of the upstream side application electrode 110 and an area on a side of the down stream side application electrode 110b.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to an electrical discharge treatment apparatus and a sheet material processing system.

Conventionally, the method includes an upper electrode placed above the conveyance path of the sheet material and a lower electrode placed below the conveyance path, and a discharge is generated between the upper electrode to which a voltage is applied and the lower electrode to which the ground is applied. A discharge treatment apparatus is known that generates electric discharge and performs discharge treatment on a sheet material. As this type of discharge treatment equipment, a corona treatment equipment has been proposed that modifies the surface of a sheet material by corona discharge in order to improve the adhesion, or wettability (affinity) when printing or coating the sheet material. (Patent Document 1, etc.).

Special table 2016-516571 publication

In this type of discharge treatment equipment, if maintenance is neglected in a configuration equipped with multiple sets of upper and lower electrodes, the upper surface of the inter-electrode upper guide member that forms the upper part of the conveyance path between the two upper electrodes will be damaged. A tracking phenomenon in which a current-carrying path called a carbonized conductive path (track) is formed sometimes occurs.

In order to solve the above-mentioned problems, the present invention provides a plurality of upper electrodes arranged above a conveyance path of a sheet material, and a plurality of lower electrodes arranged opposite to the upper electrodes below the conveyance path. In a discharge treatment apparatus that generates discharge between the upper electrode and the lower electrode and performs discharge treatment on the sheet material, a first upper electrode of the plurality of upper electrodes; an inter-electrode upper guide member disposed between the first upper electrode and a second upper electrode disposed downstream in the conveyance direction of the sheet material and forming an upper part of the conveyance path; It is characterized by comprising an insulating guide upper surface partition member that protrudes upward from the upper surface of the upper guide member and partitions the upper surface into an area on the first upper electrode side and an area on the second upper electrode side. It is something.

According to the present invention, there is an excellent effect that it is possible to provide a discharge treatment apparatus that can prevent the occurrence of tracking phenomenon on the upper surface of the inter-electrode upper guide member while improving maintainability.

FIG. 1 is a side cross-sectional view of a corona treatment device according to an embodiment. FIG. 7 is a side sectional view of a modified corona treatment device. FIG. 2 is a perspective explanatory diagram of an electrode unit according to an embodiment. FIG. 3 is an enlarged top perspective view of the vicinity of the hanging block of the embodiment. FIG. 3 is an enlarged explanatory view of the vicinity of the upper guide plate with deposits formed on the upper surface in the embodiment. An explanatory diagram of an electric circuit that applies an AC voltage to an application electrode. FIG. 7 is a perspective explanatory view of a modified electrode unit. The enlarged top perspective view of the hanging block vicinity of a modification. FIG. 1 is a side view schematically showing a decorative printing system according to an embodiment. FIG. 1 is a plan view schematically showing a decorative printing system according to an embodiment. FIG. 3 is a side sectional view of the corona treatment device of Comparative Example 1. FIG. 3 is a perspective explanatory diagram of an electrode unit of Comparative Example 1. FIG. 6 is an enlarged top perspective view of the vicinity of the hanging block of Comparative Example 1. FIG. 3 is an enlarged explanatory view of the vicinity of the upper guide plate on which deposits are formed on the upper surface in Comparative Example 1; FIG. 3 is a perspective explanatory diagram of an electrode unit of Comparative Example 2. FIG. 7 is an enlarged top perspective view of the vicinity of the hanging block of Comparative Example 2.

Hereinafter, the same or equivalent components, members, and processes shown in each drawing will be denoted by the same reference numerals, and redundant explanations will be omitted as appropriate. Further, the dimensions of members in each drawing are shown enlarged or reduced as appropriate to facilitate understanding. Further, in each drawing, some members that are not important for explaining the embodiments are omitted.

Hereinafter, one embodiment of the discharge treatment apparatus according to the present invention will be described.

FIG. 1 is a cross-sectional view schematically showing a corona treatment device 26, which is a discharge treatment device according to this embodiment. The corona treatment device 26 has its lower surface supported by the lower guide plate 108 (108a, 108b, 108c), and treats the sheet material conveyed by the conveyance roller 208 by corona discharge while passing through the internal conveyance path 120. Modify its surface.
As shown in FIG. 1, the corona treatment device 26 includes two discharge parts 102 (an upstream discharge part 102a and a downstream discharge part 102b), a housing 104, and a suction device 106.

The discharge section 102 includes application electrodes 110 to which a high voltage is applied (upstream application electrode 110a, downstream application electrode 110b), and ground electrodes 112 connected to earth (upstream ground electrode 112a, downstream ground electrode 112b). including. The application electrode 110 is arranged above a conveyance path 120 through which a sheet material to be subjected to corona treatment passes. The ground electrode 112 is arranged below the transport path 120 so as to face the application electrode 110 with the transport path 120 in between.
The length of the application electrode 110 and the ground electrode 112 in the width direction X is longer than the maximum length in the width direction X of the sheet material to be subjected to corona treatment, that is, the maximum width according to the specification of the sheet material.

The application electrode 110 consists of a core part 1101 made of a conductor such as copper, and a surface part 1102 made of a dielectric material such as ceramic, and one end of the core part 1101 in the width direction X is connected to an AC power source (not shown). connected, and the other end is covered with an insulator. The application electrode 110 is not particularly limited as long as it can cause corona discharge between it and the grounded electrode 112 when a high voltage is applied thereto.

The ground electrode 112 is not particularly limited as long as it can cause corona discharge between it and the application electrode 110 to which a high voltage is applied. The ground electrode 112 of this embodiment shown in FIG. 1 has an upper surface whose cross-sectional shape in a cross section perpendicular to the width direction X (YZ cross section) is an arc. The ground electrode 112 may be a rotatable roller member with a circular cross section perpendicular to the width direction X, or may be a cylindrical member that does not rotate.

FIG. 2 is a cross-sectional view schematically showing a modified corona treatment device 26 using a roller member as the ground electrode 112.
The ground electrode 112 of the corona treatment device 26 shown in FIG. 2 is a drive roller that is driven and rotated by a drive source transmitted from a drive source (not shown). By using the driven and rotating roller member, the ground electrode 112 that contacts the lower surface of the sheet material conveyed by the conveyance roller 208 moves along with the sheet material. As a result, compared to a configuration in which the sheet material passing through the transport path 120 moves while rubbing against the surface of the fixed ground electrode 112, the transport resistance of the sheet material is reduced, and the transportability of the sheet material is improved. be able to. Further, the configuration in which a roller member is used for the ground electrode 112 is not limited to a drive roller that is driven to rotate, but a driven roller that rotates in accordance with the movement of the sheet material may be used.

In the example shown in FIG. 1, the corona treatment device 26 includes an upstream discharge section 102a (including an upstream application electrode 110a and an upstream grounding electrode 112a) and a downstream discharge section 102b (including a downstream application electrode 110b and a downstream ground electrode 110a). There are two discharge parts 102, including a ground electrode 112b), but the number of discharge parts 102 is not particularly limited.

The housing 104 includes an upper housing 130 and a lower housing 140, which are located above and below with the sheet material conveyance path 120 interposed therebetween. The upper housing 130 includes an upper housing fixing part 134 and an electrode unit 132 that is detachable from the upper housing fixing part 134. The upper housing fixing part 134 has an opening that communicates with the electrode unit 132 when it is attached. In the example shown in FIG. 1, the upper housing fixing part 134 has a box shape with an opening that communicates with the electrode unit 132 mounted below, and the electrode unit 132 has an upper surface that communicates with the upper housing fixing part 134 when mounted. It has a box shape with openings on the side and the lower side that faces the ground electrode 112 when installed.

The electrode unit 132 accommodates and holds the application electrodes 110 of each discharge section 102 and the upper guide plate 109 that forms the upper surface of the conveyance path 120 between the two application electrodes 110 inside a box-shaped interior. The lower surface of the electrode unit 132 is open below the application electrode 110 and the upper guide plate 109.
When the electrode unit 132 is attached, the internal space (132s) of the electrode unit 132 and the internal space (134s) of the upper housing fixing part 134 are defined as the opening on the top surface of the electrode unit 132 and the bottom surface of the upper housing fixing part 134. communicates with the opening of.

The lower housing 140 has a box shape with an open top surface, and accommodates the ground electrode 112 of each discharge section 102. A lower guide plate 108 is provided in the opening on the upper surface of the lower housing 140. Lower guide plate 108 supports the lower surface of the sheet material passing through corona treatment device 26 .

The lower guide plate 108 has openings at two locations where the application electrode 110 and the ground electrode 112 face each other. With these two openings, the sheet material is supported by three guide parts: the upstream discharge part front guide part 108a, the middle discharge part inner guide part 108b, and the downstream discharge part rear guide part 108c. It becomes.
In the lower guide plate 108 of the corona treatment device 26 of this embodiment, the discharge section front guide section 108a and the discharge section inner guide section 108b are one member, and the discharge section rear guide section 108c is a separate member. As long as there is a gap (opening) through which 112 is exposed, a single member may be used.

The discharge section front guide section 108a has a shape that covers a surface upstream of the top of the curved upstream ground electrode 112a, and has a downstream end facing the surface near the top of the upstream ground electrode 112a. be. This shape prevents the sheet material that has reached the downstream end of the discharge section front guide section 108a from entering the gap with the upstream ground electrode 112a, and makes it easier to transfer the supported sheet material onto the upstream ground electrode 112a. It has a shape.
The upstream end of the discharge section internal guide section 108b faces a surface that is downstream of the top of the upstream ground electrode 112a and is slightly away from the top, and this upstream end is located in front of the discharge section. It has a shape that is located at a lower position than the downstream end of the guide portion 108a. This shape prevents the sheet material that has passed the top of the upstream ground electrode 112a from moving along the surface of the upstream ground electrode 112a and entering the gap with the guide section 108b in the discharge section, and It has a shape that makes it easy to receive the sheet material from 112a. Similar to the downstream end of the discharge section front guide section 108a, the downstream end of the discharge section internal guide section 108b is shaped to face and support the surface near the top of the downstream ground electrode 112b. The shape makes it easy to transfer the sheet material to the downstream ground electrode 112b. The guide section 108b in the discharge section has a shape in which the upstream end is slightly away from the top of the upstream ground electrode 112a and the downstream end is close to the top of the downstream ground electrode 112b, so that the downstream side is higher. It may also have a shape that is inclined.
The upstream end of the discharge section rear guide section 108c is shaped to face a surface slightly away from the top of the downstream ground electrode 112b, similar to the upstream end of the discharge section inner guide section 108b. The shape is such that it is easy to receive the sheet material from the downstream ground electrode 112b.

A gap between the electrode unit 132 and the lower housing 140 on the upstream side in the conveyance direction forms a carry-in port 150 for carrying the sheet material into the housing 104. A gap between the electrode unit 132 and the lower housing 140 on the downstream side in the conveyance direction forms an outlet 152 for conveying the sheet material out of the housing 104.

The sheet material is carried into the housing 104 from the carry-in port 150 by being conveyed by the conveyance rollers 208 while being supported by the lower guide plate 108 . Then, it passes between the application electrode 110 and the ground electrode 112 of the two discharge parts 102 while contacting the ground electrode 112, and is carried out of the housing 104 through the carrying-out port 152. The upper surface of the lower guide plate 108 constitutes the lower surface of a conveyance path 120 along which the sheet material is conveyed.

When the sheet material is conveyed between the application electrode 110 and the ground electrode 112 of the discharge section 102 while a high-frequency AC voltage is applied to the application electrode 110, a negative voltage is applied to the application electrode 110. A corona discharge occurs between the application electrode 110 and the ground electrode 112 at the timing when the corona discharge occurs, and the surface (upper surface) of the sheet material moving along the surface of the ground electrode 112 is subjected to corona treatment. Since the application electrode 110 and the ground electrode 112 have a width greater than the width of the sheet material, the corona treatment is applied to the entire upper surface of the sheet material as the sheet material is conveyed. When the corona treatment is performed, ozone (O ₃ ) is generated in the air within the housing 104.

Dashed arrows in FIG. 1 indicate the flow of air within the housing 104 and the flow of air flowing into the housing 104.
A first exhaust port 160 is formed in the housing 104 at the upper part of the upper housing 130 on the application electrode 110 side (that is, above the transport path 120). The housing 104 may be provided with a plurality of first exhaust ports 160.

Further, in the housing 104, a second exhaust port 162 is formed in the lower part of the lower housing 140 on the ground electrode 112 side (that is, below the conveyance path 120). The housing 104 may be provided with a plurality of second exhaust ports 162.

The gas containing ozone in the housing 104 is sucked and exhausted from the first exhaust port 160 and the second exhaust port 162 by the suction device 106 . The suction and exhaust of gas within the housing 104 also has the effect of cooling the discharge section 102.

In the present embodiment, the amount of gas sucked from inside the housing 104 by the suction device 106, that is, the amount of gas exhausted from the first exhaust port 160 and the second exhaust port 162, is the same when the sheet material is not carried into the housing 104. (that is, when the opening on the top surface of the lower housing 140 is not blocked), the second exhaust gas on the ground electrode 112 side (lower side) is larger than the exhaust volume from the first exhaust port 160 on the application electrode 110 side (upper side). Increase the amount of exhaust air from the port 162.

When the sheet material passing between the application electrode 110 and the ground electrode 112 rises from the ground electrode 112, corona discharge occurs, for example, between the back surface (lower surface) of the sheet material and the ground electrode 112, and the surface of the sheet material ( Corona discharge may no longer occur on the upper surface) side. When the sheet material lifts up in this way, stable corona discharge cannot be obtained on the surface (upper surface) side of the sheet material, making it impossible to obtain the desired surface modification effect. On the other hand, by making the lower exhaust volume larger than the upper exhaust volume, as shown by the broken line arrow in FIG. Negative pressure is generated that is sucked toward the lower internal space 140s. Then, the sheet material conveyed through the conveyance path 120 is attracted by this negative pressure, so that the sheet material passing between the application electrode 110 and the ground electrode 112 can be suppressed from floating up from the ground electrode 112, and the sheet material A stable corona discharge can be obtained on the surface (upper surface) side.

When suction is performed from the first exhaust port 160 and the second exhaust port 162 by a single suction device 106, or from the first exhaust port 160 and the second exhaust port 162 by separate suction devices 106 with the same suction amount set. When suctioning, set the exhaust route as follows. That is, the section where the cross-sectional area is the smallest in the second exhaust path 168, which is the exhaust path from the second exhaust port 162, is the portion where the cross-sectional area is the minimum in the first exhaust path 166, which is the exhaust path from the first exhaust port 160. Set so that the cross-sectional area is larger than the part where it is. This makes it possible to satisfy the above displacement relationship.

When suction is performed from the first exhaust port 160 and the second exhaust port 162 by separate suction devices 106, the set value of the suction amount of the suction device 106 that suctions from the second exhaust port 162 is set to the suction amount that is suctioned from the first exhaust port 160. By setting the suction amount of the device 106 higher than the set value, the above-mentioned relationship of the exhaust amount can be satisfied.

The electrode unit 132 has an inlet side extension part 136 extending from the lower end of the upstream side (right side in FIG. 1) to the downstream side in the conveyance direction. Further, the electrode unit 132 has an outlet side extension part 138 extending from the lower end of the downstream side (left side in FIG. 1) to the upstream side in the conveyance direction. These extensions (136, 138) prevent the user from touching the application electrode 110 and prevent ultraviolet radiation generated by the corona discharge from being directed toward the user.

As the material of the lower guide plate 108, which is a support member that supports the lower surface of the sheet material passing through the conveyance path 120, it is desirable to use a conductive material for the following reasons.
That is, when a nonconductive sheet material such as paper or a resin film is subjected to corona treatment, the sheet material becomes electrically charged. At this time, if the lower guide plate 108 is also a non-conductor, the sheet material will stick to the lower guide plate 108 due to static electricity, resulting in poor conveyance. In this embodiment, the lower guide plate 108 is made of a conductive metal plate and is also grounded. As a result, even if the sheet material is charged with electricity due to the corona treatment, the lower surface side is grounded through the lower guide plate 108 and the electricity is removed, so that it is possible to prevent the sheet material from sticking to the lower guide plate 108 due to static electricity. It is possible to prevent conveyance defects caused by this. As described above, it is desirable that the material of the lower guide plate 108 is a conductive material, and the conductive material is not limited to metal such as the sheet metal mentioned above, but also conductive resin or conductive plating treatment applied to the resin surface. Any material that can be grounded to eliminate static electricity, such as a

Note that if the sheet material is conveyed while being rubbed on the lower guide plate 108 made of metal such as a sheet metal, there is a risk that the sheet material will be scratched by the edges of the lower guide plate 108 or the like. As a configuration to solve this problem, a conductive film may be attached to at least one upper surface of the lower guide plate 108. This conductive film preferably has lower rigidity than the lower guide plate 108 and is conductive.

In order to prevent the sheet material from being scratched at the edge of the metal lower guide plate 108, a resin film sometimes called a Mylar sheet is attached to the lower guide plate 108 as a contact member for the sheet material, thereby preventing sheet jams. Occasionally this occurred. This is because the resin film is a nonconductor, so when the charged sheet material comes into contact with it, the resin film becomes electrically charged, and the potential on the surface of the resin film increases enough to stop the sheet material after a few sheets have been passed. Conceivable. In contrast, by pasting a conductive sheet on the lower guide plate 108, it is possible to prevent scratches and also prevent sheet jams caused by electrical charging of the sheet material contact member that prevents scratches. Can be done.

By pasting the conductive film so as to overlap the edge portion of the lower guide plate 108, it is possible to prevent the sheet material from being scratched.
Furthermore, since the sheet material contact member that protects the edge part has conductivity, the potential of the charged sheet material is transferred to the lower guide plate of the grounded conductive material via the conductive film that is the sheet material contact member. 108 can be released. Therefore, it is possible to prevent the sheet material from clogging due to an increase in the potential of the sheet material contacting member due to repeated paper passing.

Here, a configuration has been described in which the lower guide plate 108 to which the conductive film is attached is conductive and grounded. As long as the conductive film is grounded, the lower guide plate 108 to which the conductive film is attached may not be grounded, and furthermore, the lower guide plate 108 may not be conductive.

The corona treatment device 26 supplies a sheet from an application electrode 110, which is a discharge electrode, provided above a conveyance path 120 through which the sheet material conveyed in a predetermined conveyance direction Y by a conveyance mechanism such as a conveyance roller 208. This is a corona discharge device that performs corona discharge to a ground electrode 112 that is a ground side electrode that contacts the lower surface of a material. Then, as described above, the charge of the sheet material that has passed through the discharge section 102 and has been charged can be released.

FIG. 3 is a perspective view of the electrode unit 132 pulled out toward the front in FIG. 1, viewed from above.
As shown in FIGS. 1 to 3, the hanging block 107 has an upper guide plate 109 fixed to its lower surface. As shown in FIG. 3, the two application electrodes 110 are connected to the housing of the electrode unit 132 via the electrode holding block 207, the hanging block 107, the upper guide plate 109, the insulating support material 209, and the unit internal beam member 111. fixed to the body.

FIG. 4 is an enlarged top perspective view of the two application electrodes 110, the upper guide plate 109, and the hanging block 107 in the vicinity of the hanging block 107.
As shown in FIG. 4, the hanging block 107 includes an upper and lower through hole 107j in the center in the longitudinal direction, and horizontal through holes 107h in the vicinity of both ends in the longitudinal direction.
By fixing the lower end fixing part of the insulating support material 209 to the fixing part of the upper guide plate 109 through the upper and lower through holes 107j, the hanging block 107 can be held by the upper guide plate 109 fixed to the insulating support material 209. can.
In addition, by passing the mounting shafts of the two electrode holding blocks 207 to which the two application electrodes 110 are respectively fixed through the two horizontal through-holes 107h of the hanging block 107 and fixing them, the application electrodes can be connected to the hanging block 107. 110 can be fixed.

Next, the characteristic parts of the corona treatment device 26 of this embodiment will be explained.
As shown in FIGS. 1 to 4, the corona treatment device 26 includes an upstream application electrode 110a, which is a first upper electrode, and an upstream application electrode 110a, which is disposed downstream of the upstream application electrode 110a in the conveying direction of the sheet material. It includes a downstream application electrode 110b which is a second upper electrode.
Further, an upper guide plate 109 is provided, which is an inter-electrode upper guide member that is arranged between the upstream application electrode 110a and the downstream application electrode 110b and forms the upper part of the transport path 120.
Further, a guide upper wall part 101 is provided which is a guide upper surface partitioning member that protrudes upward from the upper surface of the upper guide plate 109 and partitions this upper surface into an area on the upstream side application electrode 110a side and an area on the downstream side application electrode 110b side. Be prepared.

11 to 13 are explanatory diagrams of a corona treatment device 26 of a first comparative example (hereinafter referred to as "comparative example 1") that does not include the guide upper wall part 101. FIG. 11 is a cross-sectional view schematically showing the corona treatment device 26 of Comparative Example 1. FIG. 12 is a perspective view of the electrode unit 132 included in the corona treatment device 26 of Comparative Example 1, viewed from above on the near side in FIG. FIG. 13 is an enlarged top perspective view of the two application electrodes 110, the upper guide plate 109, and the hanging block 107 included in the corona treatment device 26 of Comparative Example 1.

As shown in FIGS. 11 to 13, Comparative Example 1 differs from the implementation shown in FIGS. Different from the form.
When the present applicants continued to use the corona treatment device 26 of Comparative Example 1, depending on the usage environment, carbonized conductive paths (tracks) may be formed on the upper surface of the upper guide plate 109 formed of an insulator such as resin. It was found that a tracking phenomenon occurs, in which an electrical path is formed. Specifically, a carbonized conductive material in which some substance is carbonized is placed at the corner of the straight line where the lower end of the side surface of the hanging block 107 and the upper surface of the upper guide plate 109 are in contact with each other, which is surrounded by a broken-line ellipse in FIG. tracts were sometimes formed.

The tracking phenomenon occurs as follows. When dust floating in the air accumulates between electrodes with a potential difference and takes in moisture from the air, a weak current can flow. The part where this weak current can flow is a resistor that generates Joule heat when the current flows, and this Joule heat carbonizes the resin and dust, and this carbonized part becomes more hygroscopic. Moisture (humidity) in the air is further taken into this carbonized portion, thereby forming a carbonized conductive path that serves as a path for current between the electrodes that are supposed to be insulated.

FIG. 14 is an enlarged explanatory view of the vicinity of the upper guide plate 109 showing a state in which a deposit T containing dust and moisture is formed on the upper surface of the upper guide plate 109 of Comparative Example 1.
On the upper surface of the upper guide plate 109, an upward air current is generated from the conveyance path 120, and dust such as paper powder from the sheet material passing through the conveyance path 120 tends to fly up. Easy to accumulate.
As in Comparative Example 1, the upper surface of the upper guide plate 109 is a flat surface except for the part where it contacts the hanging block 107, and if the upper surface of the upper guide plate 109 is not cleaned regularly, As shown in FIG. 14, continuous deposits T may be formed on the upper surface of the upper guide plate 109 from the upstream end in the transport direction to the downstream end in the transport direction. Particularly, dust tends to accumulate at the corner of the boundary between the side surface of the hanging block 107 and the upper surface of the upper guide plate 109, and deposits T are likely to be formed on a straight line along the conveyance direction.

As shown in FIG. 14, since the two application electrodes 110 (110a, 110b) are not in contact with the deposit T, it appears that no path for current flow is formed. However, such a high voltage is applied that electrical discharge occurs between the ground electrodes 112 (112a, 112b) arranged apart from each other across the transport path 120. Therefore, it is considered that current is passed between the application electrode 110 and the deposit T by discharge in the air as indicated by the broken line arrow in FIG. Then, when the two application electrodes 110 are enabled to conduct electricity through the deposit T, the above-mentioned tracking phenomenon in which the carbonized conductive path is formed occurs.

When a carbonized conductive path is formed on the upper surface of the upper guide plate 109, a current flows between the two application electrodes 110, the potential difference between the application electrode 110 and the ground electrode 112 decreases, and the discharge in the discharge section 102 decreases. There is a risk that the strength will decrease and the quality of the discharge treatment will deteriorate. Furthermore, if carbonized dust or resin that forms the carbonized conductive path falls from the upper guide plate 109, it may cause contamination within the device or dirt on the sheet material.
Furthermore, if the carbonized conductive path is left as it is, there is a risk that the Joule heat will cause members near the carbonized conductive path to catch fire, damaging the device.

In contrast, this embodiment includes a guide top wall part 101 on the top surface of the top guide plate 109. The guide upper wall part 101 is made of an insulator such as resin.
FIG. 5 is an enlarged explanatory view of the vicinity of the upper guide plate 109 showing a state in which a deposit T containing dust and moisture is formed on the upper surface of the upper guide plate 109 of the embodiment.
As shown in FIG. 5, the upper surface of the upper guide plate 109 of the embodiment is partitioned by the guide upper wall part 101 into an area on the upstream side application electrode 110a side and an area on the downstream side application electrode 110b side. As a result, even if the upper surface of the upper guide plate 109 is not cleaned regularly, a continuous deposit T will be formed on the upper surface of the upper guide plate 109 from the upstream end in the transport direction to the downstream end in the transport direction. can be prevented.

In particular, the two wall side surfaces 101f (101fa, 101fb) of the guide upper wall part 101 are wall-like planes extending in the vertical direction. Therefore, dust etc. cannot accumulate on the wall side 101f, and even if deposits T are formed on the upper surface of the upper guide plate 109 or the upper surface of the guide upper wall part 101, the deposits T will not accumulate on the wall side 101f. Discontinued. This can more reliably prevent continuous deposits T from being formed on the upper surface of the upper guide plate 109 from the upstream end in the transport direction to the downstream end in the transport direction. Note that even if one of the two wall surfaces 101f is an inclined surface, continuous formation of deposits T can be prevented by making the other wall surface a vertical wall surface.

In this way, by preventing the continuous formation of deposits T, it is possible to prevent the two application electrodes 110 from being able to conduct electricity through the deposits T, and more reliably prevent the above-mentioned tracking phenomenon from occurring. can be prevented.

Note that even with a configuration like Comparative Example 1, the tracking phenomenon can be prevented from occurring by appropriately cleaning the upper surface of the upper guide plate 109. However, if the configuration includes the guide top wall part 101 as in this embodiment, even if the frequency of cleaning the top surface of the top guide plate 109 is reduced, the occurrence of tracking phenomenon can be prevented, so maintenance efficiency can be improved. can be achieved.

The upper guide plate 109 forms the ceiling surface of the conveyance path 120 between the two application electrodes 110, and prevents the sheet material from entering a gap different from the conveyance path 120 between the two application electrodes 110. It is prevented.
By increasing the distance between the application electrode 110 and the upper guide plate 109 in the direction along the conveyance direction of the sheet material, the occurrence of the above-mentioned tracking phenomenon can be suppressed. However, in order to prevent the sheet material from entering a gap different from the conveyance path 120, it is desirable to reduce the distance between the application electrode 110 and the upper guide plate 109. In this embodiment, by providing the guide upper wall part 101, the distance between the application electrode 110 and the upper guide plate 109 can be narrowed, and the sheet material can be prevented from entering a gap different from the conveyance path 120. , it is possible to realize a configuration that also prevents the occurrence of tracking phenomena.

FIG. 6 is an explanatory diagram of an electric circuit that applies an AC voltage to the application electrode 110.
FIG. 6(a) is an electric circuit diagram of this embodiment, and FIGS. 6(b) and (c) are electric circuit diagrams of a reference example.
The AC power supplied from the AC power supply 200 is transformed by a transformer 250, which is a transformer, and applies an AC voltage to the upstream application electrode 110a and the downstream application electrode 110b.

The black circles attached to one end side of each coil constituting the transformer 250 in FIG. 6 indicate portions with matching polarities. When the side marked with a black circle across the coil on the AC power supply 200 side constituting the transformer 250 in FIG. side has negative polarity. At this time, the downstream application electrode 110b in FIG. 6A has a negative potential (for example, "-Vb"), and the upstream application electrode 110a has a positive potential (for example, "+Va"). When the side marked with a black circle across the coil on the AC power supply 200 side constituting the transformer 250 in FIG. The applied side also has positive polarity, and the downstream application electrode 110b has a positive potential (for example, "+Vb"), and the upstream application electrode 110a has a negative potential (for example, "-Va"). Since a discharge occurs when the applied electrode 110 has a negative potential, when the upper side of the AC power supply 200 in FIG. 6(a) has a positive polarity, a discharge occurs in the upstream discharge section 102a, and the When the upper side of the power supply 200 has negative polarity, discharge occurs in the downstream discharge section 102b.

On the other hand, in the configuration of the electric circuit of the reference example shown in FIG. 6(b), discharge occurs in the discharge section 102 only when the upper side of the AC power supply 200 in FIG. 6(b) has negative polarity.
Further, in the configuration of the electric circuit of the reference example shown in FIG. 6(c), only when the upper side of the AC power supply 200 in FIG. 6(c) has negative polarity, the upstream discharge section 102a and the downstream discharge section 102b A discharge occurs.

In the electric circuit of the reference example shown in FIGS. 6(b) and (c), positive and negative voltages are output from the transformer 250 when AC power is supplied from the AC power supply 200. ) Discharge can only occur during a period when the upper side of the AC power supply 200 in the battery has negative polarity.
On the other hand, in the electric circuit of this embodiment shown in FIG. 6(a), the upper side of the AC power supply 200 in FIG. 6(a) has a positive polarity and a negative polarity, respectively. Since the upstream discharge section 102a and the downstream discharge section 102b discharge each other, the discharge efficiency with respect to the power consumption is calculated to be twice as much as the loss is ignored.

In this embodiment, the applied voltage of the upstream applying electrode 110a and the downstream applying electrode 110b changes at the same frequency between positive and negative voltages due to the connected AC power supply 200. An AC voltage having an opposite phase to that of the electrode 110b is applied. Specifically, at the timing when the voltage of "+Va" is applied to the upstream side application electrode 110a, the voltage of "-Vb" is applied to the downstream side application electrode 110b, and the voltage of "-Va" is applied to the upstream side application electrode 110a. At the timing when a voltage is applied, a voltage of "+Vb" is applied to the downstream application electrode 110b.
Therefore, the potential difference between the upstream application electrode 110a and the downstream application electrode 110b is "|Va|+|Vb|", and the potential difference (|Va|) between the upstream application electrode 110a and the ground electrode 112 and the downstream application The potential difference is larger than the potential difference (|Vb|) between the electrode 110b and the ground electrode 112. The condition for increasing the potential difference between the two application electrodes 110 as described above is such that in a configuration where a continuous deposit T can be formed on the upper surface of the upper guide plate 109, as in Comparative Example 1, there is a possibility that a tracking phenomenon will occur. Increase. However, as in this embodiment, if the guide top wall part 101 is provided and the continuous deposit T is not formed, the tracking phenomenon will occur even under conditions where the potential difference between the two application electrodes 110 is large. can be prevented.

The corona treatment device 26 of this embodiment includes an application electrode elevating mechanism (not shown) that changes the distance of the application electrode 110 with respect to the ground electrode 112 by moving the upper housing 130 in the vertical direction.
By making it possible to change the distance between the ground electrode 112 and the application electrode 110, the distance between the ground electrode 112 and the application electrode 110 can be changed according to the thickness of the sheet material to be conveyed, and the thickness of the sheet material can be changed. Appropriate discharge treatment can be performed even if the
Here, when the distance between the ground electrode 112 and the application electrode 110 increases, the discharge starting voltage between the ground electrode 112 and the application electrode 110 increases. At this time, if a continuous deposit T is formed on the upper surface of the upper guide plate 109, the deposit T between the application electrodes 110 with a larger potential difference is likely to be charged, and as a result, a weak current flows. tracking phenomenon is likely to occur.
In contrast, in this embodiment, the guide top wall part 101 is provided and the continuous deposit T is not formed, so even if the ground electrode 112 and the application electrode 110 are far apart, Tracking phenomenon can be prevented from occurring.

[Modified example]
Next, a modified example of the corona treatment device 26 that does not include the electrode holding block 207 will be described.
FIG. 7 is a perspective view of the electrode unit 132 included in the corona treatment device 26 of the modification, viewed from above on the near side, and FIG. 8 is a perspective view of the two application electrodes 110 and the upper guide provided in the corona treatment device 26 of the modification FIG. 3 is an enlarged top perspective view of the plate 109 and the hanging block 107. The corona treatment device 26 of the modified example is the same as the corona treatment device 26 of the above-described embodiment except for the electrode holding block 207 and the configuration for attaching the electrode holding block 207, so the description of the common configuration will be omitted as appropriate. Moreover, as shown in FIG. 7, the insulating support material 209 of the modified example is a columnar member with no unevenness on the surface.

In the configuration in which the application electrode 110 is held by the hanging block 107 via the electrode holding block 207 as in the corona treatment device 26 of the above-described embodiment, the application electrode 110 may be bent when the application electrode 110 is long in the width direction. This can prevent variations in the distance from the ground electrode 112 between the center and end portions of the application electrode 110 in the width direction. On the other hand, if the problem of deflection of the application electrode 110 does not occur, such as when the application electrode 110 is short in the width direction or when the application electrode 110 is highly rigid, a configuration without the electrode holding block 207 as in the modified example may be used. Good too.
As shown in FIGS. 7 and 8, the hanging block 107 of the electrode unit 132 of the modified example does not extend above the application electrode 110 in the paper conveyance direction (left-right direction in FIG. 7), and It has a shape that contacts the upper surface of the plate 109 and extends over the entire upper surface of the upper guide plate 109 in the paper conveyance direction. As a configuration for supporting the upper guide plate 109, a configuration in which the center portion in the paper transport direction is supported on the insulating support member 209 without arranging the hanging block 107, or a configuration in which only the both ends of the insulating support member 209 in the width direction are supported. There are several possible configurations. However, in these configurations, there is a risk that the plate-shaped upper guide plate 109 may be twisted. On the other hand, by providing the hanging block 107 that extends and contacts the entire upper surface of the upper guide plate 109 in the paper conveyance direction, twisting of the upper guide plate 109 can be suppressed.

15 and 16 are explanatory diagrams of a corona treatment device 26 of a second comparative example (hereinafter referred to as "comparative example 2") that does not include the guide upper wall part 101 in contrast to the modified example. FIG. 15 is a perspective view of the electrode unit 132 of the corona treatment device 26 of Comparative Example 2 seen from above on the near side, and FIG. FIG. 3 is an enlarged top perspective view of the plate 109 and the hanging block 107. In Comparative Example 2, for the same reason as Comparative Example 1, something was not done at the corner on the straight line where the lower end of the side surface of the hanging block 107 and the upper surface of the upper guide plate 109 are in contact with each other, which is surrounded by the broken-line oval in FIG. 16. A tracking phenomenon may occur in which a carbonized conductive path is formed by carbonizing the substance.
On the other hand, the modified example includes a guide upper wall part 101 made of an insulator on the upper surface of the upper guide plate 109. This can prevent continuous deposits from being formed on the upper surface of the upper guide plate 109 from the upstream end in the transport direction to the downstream end in the transport direction.

In Comparative Example 2 shown in FIGS. 15 and 16, deposits are likely to be formed along the side surface of the hanging block 107 that extends and contacts the entire upper surface of the upper guide plate 109 in the paper conveyance direction; Even in a configuration that does not include the suspension block 107 or the insulating support material 209, there is a possibility that a tracking phenomenon may occur due to accumulation of deposits on the upper surface of the upper guide plate 109. On the other hand, if the configuration includes the guide top wall part 101 as in the modification shown in FIGS. 7 and 8, the tracking phenomenon can be prevented from occurring.

Next, a decorative printing system to which the corona treatment device 26, which is the discharge treatment device according to the embodiment described above, can be applied will be described.
9 and 10 are diagrams schematically showing a decorative printing system 10 to which a corona treatment device 26, which is a discharge treatment device according to this embodiment, is applied.
FIG. 9 is a side view, and FIG. 10 is a plan view. The decorative printing system 10 is a device that performs predetermined decorative printing on a sheet material while conveying the sheet material. Sheets can be made from a variety of materials, including paper, cloth, resin, and metal. Hereinafter, the direction in which the sheet material is conveyed (the direction from right to left in FIGS. 9 and 10) will be referred to as the conveying direction Y, and the direction perpendicular to the conveying direction Y (the direction perpendicular to the plane of the paper in FIG. 9 and as shown in FIG. 10). (vertical direction) is called the width direction X.

The decorative printing system 10 includes a paper feeding device 12, a varnish coating device 14, a foil stamping device 16, a stacker 18, and a control device 20. The paper feeding device 12 feeds sheet materials one by one, and the varnishing device 14 applies varnish to the sheet materials fed one by one. The foil stamping device 16 transfers the foil onto the sheet material using the tackiness of the varnish applied onto the sheet material, and the stacker 18 accumulates the sheet material. Further, the control device 20 integrally controls the decorative printing system 10. The paper feeding device 12, the varnishing device 14, the foil stamping device 16, and the stacker 18 are arranged in a line in this order from the upstream side (the right side in FIGS. 9 and 10) in the conveyance direction Y. The control device 20 is connected to the paper feeding device 12 , the varnishing device 14 , the foil stamping device 16 , and the stacker 18 via the network 2 .

As shown in FIGS. 9 and 10, the paper feeding device 12 includes a feeder 22, a corona treatment device 26, and a resist section 24. The feeder 22 includes a paper feeding table 28 and a suction head 30. Sheet materials are stacked on a paper feed table 28 that is configured to be movable up and down. The suction head 30 feeds out the sheet materials stacked on the paper feed table 28 one by one from the top.

The corona treatment device 26 modifies the surface of the sheet material fed out by the feeder 22 by corona discharge. As this corona treatment device 26, the corona treatment device 26 according to the embodiment described using FIGS. 1 to 5 is used.

As shown by the arrow "α" in FIG. It is conveyed while abutting the right end face) against the registration reference guide 32. Thereby, the positions of the sheet materials sent out by the feeder 22 in the width direction X are aligned.

The varnish coating device 14 includes a sheet material sensor 42, a pair of CCD sensors 44, at least one varnish discharge section 46, a semi-curing ultraviolet lamp 48, and a main curing ultraviolet lamp 50. The sheet material sensor 42, the pair of CCD sensors 44, the varnish discharge section 46, the semi-curing ultraviolet lamp 48, and the main curing ultraviolet lamp 50 are arranged in this order from the upstream side. In the illustrated example, the varnish applicator 14 includes three varnish discharge parts 46, but the varnish applicator 14 includes one varnish discharge part 46 extending over the entire width direction X. or may include two, four or more varnish discharge parts 46. Although LEDs that emit ultraviolet rays are used as the semi-curing ultraviolet lamp 48 and the main curing ultraviolet lamp 50, other light sources such as light bulbs and fluorescent lamps may be used as long as they emit ultraviolet rays. It is desirable that the light source has an adjustable output.

The sheet material sensor 42 detects the sheet material fed from the paper feeding device 12 and carried out from the registration section 24 .

The varnish discharge unit 46 is a line-type inkjet head in the illustrated example, although it is not particularly limited. The varnish discharge unit 46 is triggered by the detection of the leading edge of the sheet material by the sheet material sensor 42, and discharges ultraviolet curable varnish according to the varnish discharge data, thereby applying the ultraviolet curable varnish to the sheet material. The varnish discharge data is data indicating where on the sheet material the varnish is to be applied.

A base image and a plurality of registration marks serving as a reference for specifying the position of the base image may be printed in advance on the sheet material fed by the paper feed device 12. The varnish applicator 14 applies varnish so as to have a predetermined relationship with the base image in accordance with varnish discharge data that defines the varnish coated portion of the sheet material. For example, the varnish is applied so as to overlap the base image. You may.

Here, the base image of the sheet material may be shifted or distorted. Therefore, when applying varnish so as to have a predetermined relationship with the base image, it is necessary to correct the varnish discharge data in consideration of deviations and distortions. For example, the CCD sensor 44 captures an image of the sheet material using the detection of the sheet material by the sheet material sensor 42 as a trigger, and the control device 20 analyzes the image data captured by the CCD sensor 44 and compares the theoretical positions of the plurality of registration marks. Depending on the difference, the varnish ejection data in the area surrounded by the registration mark may be corrected. Note that the method described in Japanese Unexamined Patent Application Publication No. 2016-083898, which was previously filed by the present applicant, can be applied to this amendment.

The semi-curing ultraviolet lamp 48 irradiates the varnish on the sheet material with relatively low-output ultraviolet rays to semi-cure the varnish. Semi-curing refers to lightly curing the varnish (for example, to a state where it can be further cured) while reducing the fluidity of the varnish but not completely curing it. By semi-curing at least the surface of the varnish, while maintaining the tackiness of the varnish, it is possible to prevent the varnish from flowing on the sheet material and to stabilize the position of the varnish on the sheet material. The semi-cured varnish is fully cured in the foil stamping device 16. When the sheet material is not stamped with foil, the semi-curing ultraviolet lamp 48 is normally turned off, but the semi-curing ultraviolet lamp 48 may be used when the sheet material is not stamped with foil. For example, if the varnish applied to the sheet material is likely to bleed, the semi-curing ultraviolet lamp 48 is turned on to semi-cure at least the surface of the varnish. This can prevent varnish from bleeding.

The main curing ultraviolet lamp 50 irradiates the varnish applied to the sheet material with ultraviolet rays to main cure the varnish. When stamping a sheet material with foil, the main curing ultraviolet lamp 50 is turned off.

That is, when foil stamping a sheet material, the varnish is semi-cured by the semi-curing ultraviolet lamp 48, and the semi-cured varnish is fully cured by the foil stamping ultraviolet lamp 66 of the foil stamping device 16. In this case, the main curing ultraviolet lamp 50 is turned off. When the sheet material is not stamped with foil, that is, when the sheet material is only coated with varnish, the varnish is fully cured using the main curing ultraviolet lamp 50. In this case, the semi-curing UV lamp 48 and the foil stamping UV lamp 66 of the foil stamping device 16 are turned off. However, as described above, the semi-curing ultraviolet lamp 48 may be turned on even when foil stamping is not being performed. Further, although an LED that emits ultraviolet rays is used as the light source of the ultraviolet lamp 66 for foil stamping, other light sources may be used as long as they emit ultraviolet rays.

The foil stamping device 16 transports the web 52 roll-to-roll. The web 52 is a foil holding film in which a foil (eg, metal foil) is held on the film. In the foil stamping device 16, the web 52 and the sheet material are brought into contact with each other while being conveyed. The foil held by the web 52 adheres to the semi-cured varnish on the sheet material due to its tackiness. In this state, that is, in a state in which the foil is held by the web 52 but adhered to the semi-cured varnish, the foil stamping ultraviolet lamp 66 irradiates the varnish with ultraviolet rays to fully cure the varnish. When the varnish is fully cured, the strength of the fully cured varnish to adhere the foil is stronger than the strength of the web 52 to hold the foil. In this state, when the sheet material is conveyed to separate the sheet material and the web 52, the foil held on the web 52 is transferred to the varnished portion of the sheet material.
The stacker 18 accumulates the sheet materials carried out from the foil stamping device 16.

The control device 20 is, for example, an information processing terminal such as a PC. The control device 20 receives input regarding the definition of a decorative print job. The control device 20 may display a predetermined job management screen and accept input regarding the job definition via the job management screen. The job definition includes, for example, the number of sheet materials to be subjected to decorative printing (number of decorative printing copies), the size of the sheet material to be subjected to decorative printing, varnish discharge data, presence or absence of corona treatment, presence or absence of foil stamping, and This includes adjusting the pinning strength (degree of semi-hardening), etc. The control device 20 controls the paper feeding device 12, the varnishing device 14, and the foil stamping device 16 based on the job definition.

The above is the basic configuration of the decorative printing system 10.

Another example of the configuration of the decorative printing system 10 is to include a printer that prints a base image and registration marks on sheet materials in place of the paper feeding device 12, and to feed the sheet materials one by one from the printer. Good too.

Further, the decorative printing system 10 may include a post-processing device for cutting and binding sheet materials between the foil stamping device 16 and the stacker 18.

The present invention has been described above based on the embodiments. Those skilled in the art will understand that this embodiment is merely an example, and that various configurations are possible in combination of each component and each processing process, and that such configurations are also within the scope of the present invention. be.

What has been described above is just an example, and each of the following aspects has its own unique effects.

[Aspect 1]
At least one pair of upper electrodes, such as the application electrodes 110, which are arranged above the conveyance path of the sheet material (conveyance path 120, etc.) and where a potential difference occurs between them; and a ground electrode 112, which is arranged below the conveyance path and opposite to the upper electrodes. In a discharge treatment apparatus such as a corona treatment apparatus 26 which generates discharge between the upper electrode and the lower electrode and performs discharge treatment on a sheet material, the upstream side of the upper electrode It is arranged between a first upper electrode, such as the application electrode 110a, and a second upper electrode, such as the downstream application electrode 110b, which is arranged on the downstream side of the first upper electrode in the transport direction of the sheet material, and is arranged along the transport path. The inter-electrode upper guide member such as the upper guide plate 109 forming the upper part of the inter-electrode upper guide member is provided, and protrudes upward from the upper surface of the inter-electrode upper guide member, and the upper surface is the area on the first upper electrode side and the area on the second upper electrode side. The present invention is characterized in that it includes a guide upper surface partitioning member such as an insulating guide upper surface wall part 101 that partitions into two parts.
According to this, it is possible to prevent continuous deposits from being formed on the upper surface of the guide upper surface partition member, and it is possible to prevent the tracking phenomenon from occurring while improving maintainability.
Although the upper guide plate 109 in the embodiment has a flat upper surface, the inter-electrode upper guide member is not limited to a flat upper surface, and any member having a shape that allows deposits to form can be used in the present invention. Such a guide upper surface partition member is applicable.

[Aspect 2]
In the discharge treatment apparatus according to aspect 1, at least one of the first upper electrode side surface (101fa) and the second upper electrode side surface (101fb) of the guide upper partition member extends in the vertical direction. It is characterized by being a flat surface.
According to this, even if deposits are formed on the upper surface of the inter-electrode upper guide member or the guide upper partition member, no deposits are formed on the plane extending in the vertical direction, but continuous deposits are formed. This can be more reliably prevented.

[Aspect 3]
In the discharge treatment apparatus according to either aspect 1 or 2, an AC voltage applying means such as a transformer 250 that transforms the voltage of AC power supplied from an AC power source such as the AC power source 200 and applies an AC voltage to the upper electrode is provided. It is characterized in that the phases of the AC voltage applied from the AC voltage applying means are opposite in phase between the first upper electrode and the second upper electrode.
According to this, it is possible to improve the efficiency of voltage transformation by the AC voltage applying means, and it is possible to improve the energy efficiency in the discharge process. Here, if the phase of the AC voltage is opposite between the first upper electrode and the second upper electrode, energy efficiency can be improved, but the potential difference between the first upper electrode and the second upper electrode is As a result, a tracking phenomenon tends to occur on the upper surface of the guide upper surface partition member. However, by providing the guide upper surface partition member, it is possible to improve the energy efficiency in the discharge process while preventing the tracking phenomenon from occurring.

[Aspect 4]
The discharge treatment apparatus according to any one of aspects 1 to 3 is characterized in that the distance between the upper electrode and the lower electrode can be changed.
According to this method, the distance is changed according to the thickness of the sheet material, and the discharge process is performed appropriately according to the thickness of the sheet material, while tracking phenomenon does not occur even at a long distance. It can be prevented.

[Aspect 5]
Decorative printing that includes a discharge treatment means such as a corona treatment device 26 that performs discharge treatment on a sheet material such as a sheet material, and a sheet material supply means such as a feeder 22 that supplies the sheet material to the discharge treatment means. A sheet material processing system such as the system 10 is characterized in that the discharge treatment device according to any one of aspects 1 to 4 is provided as a discharge treatment means.
According to this, since the occurrence of tracking phenomenon can be prevented in the discharge treatment apparatus while improving maintainability, stable sheet material treatment can be performed.

[Aspect 6]
The sheet material processing system according to aspect 5 may include a coating means such as a varnish coating device 14 for applying an energy-curable ink such as varnish or an energy-curable adhesive to the sheet material discharged from the discharge treatment means. This is a characteristic feature.
According to this, by improving the wettability of the sheet material by the discharge means, it is possible to improve the quality of varnish application by the application means and to prevent the occurrence of tracking phenomenon in the discharge treatment means.

10: Decorative printing system 26: Corona treatment device 101: Guide top wall part 102: Discharge section 108: Lower guide plate 109: Upper guide plate 110: Application electrode 110a: Upstream application electrode 110b: Downstream application electrode 112: Ground Electrode 112a: Upstream ground electrode 112b: Downstream ground electrode 120: Conveyance path 132: Electrode unit 208: Conveyance roller 1101: Core part 1102: Surface layer part

Claims (6)

at least a pair of upper electrodes that are arranged above the conveyance path of the sheet material and have a potential difference between them;
a lower electrode disposed below the transport path and facing the upper electrode,
In a discharge treatment apparatus that generates discharge between the upper electrode and the lower electrode and performs discharge treatment on the sheet material,
A second upper electrode is disposed between a first upper electrode of the upper electrodes and a second upper electrode disposed on the downstream side in the conveyance direction of the sheet material with respect to the first upper electrode, and the upper electrode comprising an upper guide member between the electrodes to form;
It is characterized by comprising an insulating guide upper surface partition member that protrudes upward from the upper surface of the inter-electrode upper guide member and partitions the upper surface into an area on the first upper electrode side and an area on the second upper electrode side. Discharge treatment equipment. The discharge treatment apparatus according to claim 1,
At least one of the first upper electrode side surface and the second upper electrode side surface of the guide upper partition member is a flat surface extending in the vertical direction. . The discharge treatment apparatus according to claim 1,
comprising an AC voltage applying means for applying an AC voltage to the upper electrode by transforming the voltage of AC power supplied from an AC power source;
A discharge treatment apparatus characterized in that the phase of the alternating current voltage applied from the alternating current voltage applying means is opposite in phase between the first upper electrode and the second upper electrode. The discharge treatment apparatus according to claim 1,
A discharge treatment apparatus characterized in that a distance between the upper electrode and the lower electrode can be changed. A discharge treatment means for subjecting the sheet material to discharge treatment;
A sheet material processing system comprising: a sheet material supplying means for supplying the sheet material to the discharge processing means,
A sheet material processing system comprising the discharge treatment apparatus according to any one of claims 1 to 4 as said discharge treatment means. The sheet material processing system according to claim 5,
A sheet material processing system comprising: a coating means for applying an energy curable ink or an energy curable adhesive to the sheet material discharged from the discharge processing means.

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