WO2023074632A1 - 放電処理装置及びシート材処理システム - Google Patents

放電処理装置及びシート材処理システム Download PDF

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Publication number
WO2023074632A1
WO2023074632A1 PCT/JP2022/039553 JP2022039553W WO2023074632A1 WO 2023074632 A1 WO2023074632 A1 WO 2023074632A1 JP 2022039553 W JP2022039553 W JP 2022039553W WO 2023074632 A1 WO2023074632 A1 WO 2023074632A1
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WO
WIPO (PCT)
Prior art keywords
sheet material
discharge
sheet
upper electrode
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/039553
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English (en)
French (fr)
Japanese (ja)
Inventor
和隆 角田
孝則 金田
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Duplo Corp
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Duplo Corp
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Filing date
Publication date
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Priority to JP2023556432A priority Critical patent/JPWO2023074632A1/ja
Publication of WO2023074632A1 publication Critical patent/WO2023074632A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/10—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed before the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/47—Generating plasma using corona discharges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T19/00—Devices providing for corona discharge
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices

Definitions

  • the present invention relates to an electric discharge treatment apparatus and a sheet material treatment system.
  • the upper electrode is provided with an upper electrode arranged above the conveying path of the sheet material, a lower electrode arranged below the conveying path, and a supporting member supporting the lower surface of the sheet material passing through the conveying path. and a lower electrode to perform discharge treatment on a sheet material.
  • a corona treatment apparatus modifies the surface of the sheet material by corona discharge in order to improve the adhesion, that is, the wettability (affinity) when printing or coating the sheet material.
  • the upper electrode and the lower electrode are arranged close to each other to the extent that corona discharge occurs between them. something happened.
  • the upper electrode and the lower electrode are spaced too far apart, corona discharge may not occur or may occur only partially, resulting in inability to perform treatment or uneven treatment. problem occurs.
  • the effect of improving wettability may differ depending on the thickness of the sheet material, the properties of the sheet material, the type of underlying printing applied in advance, and the like.
  • the present invention comprises an upper electrode, a lower electrode arranged below the upper electrode, and a gap adjusting mechanism for adjusting the gap between the upper electrode and the lower electrode.
  • a conveying path is formed between the lower electrode and the sheet material so that the sheet material passes through the lower electrode while being in contact with the lower electrode.
  • an electrode pair that performs discharge processing on a material; a sheet information acquisition unit that acquires sheet information that is information about the sheet material; and a controller for controlling the gap adjusting mechanism so as to adjust the gap.
  • FIGS. 1 and 2 are diagrams schematically showing a decorative printing system 10 equipped with a corona treatment device 26, which is an electric discharge treatment device according to this embodiment.
  • the decorative printing system 10 is a device that applies predetermined decorative printing to a sheet material while conveying the sheet material.
  • Sheet materials are made of various materials such as paper, cloth, resin, and metal.
  • the direction in which the sheet material is conveyed (the direction from right to left in FIGS. 1 and 2) is the conveying direction Y
  • the direction perpendicular to the conveying direction Y (the direction perpendicular to the sheet surface in FIG. ) is referred to as the width direction X.
  • left refers to the left side in the width direction X in the conveying direction Y (the left direction in FIG. 4), and the term “right” refers to the right side in the width direction X in the conveying direction Y (the right direction in FIG. 4).
  • the decoration printing system 10 includes a sheet material supply device 12 that supplies sheet materials one by one, a varnish application device 14 that applies varnish to the sheet materials that are supplied one by one, and a tack of varnish applied to the sheet materials.
  • a foil stamping device 16 for transferring foil to a sheet material by utilizing the properties, a stacker 18 for accumulating the sheet materials, and a control device 20 for integrally controlling the decoration printing system 10 are provided.
  • the sheet material supply device 12, the varnish coating device 14, the foil stamping device 16, and the stacker 18 are arranged in a line in this order from the upstream side in the conveying direction Y (the right side in FIGS. 1 and 2) (hereinafter, the upstream side in the conveying direction Y).
  • the control device 20 is connected to the sheet material supply device 12 , the varnish coating device 14 , the foil stamping device 16 and the stacker 18 via the network 2 .
  • the sheet material supply device 12 includes a feeder 22 , a corona treatment device 26 and a registration section 24 .
  • Feeder 22 includes table 28 and suction head 30 . Sheet materials are stacked on the table 28 .
  • the table 28 is configured to be movable up and down.
  • the suction head 30 sends out the sheet materials stacked on the table 28 one by one in order from the top.
  • the corona treatment device 26 modifies the surface of the sheet material fed by the feeder 22 by corona discharge. A detailed configuration of the corona treatment device 26 will be described later.
  • the registration unit 24 applies a conveying force inclined with respect to the conveying direction Y to the sheet material, so that one end surface of the sheet material in the width direction X (conveying direction The end face on the right side with respect to Y) is conveyed while abutting against the registration reference guide 32 .
  • the positions in the width direction X of the sheet material fed by the feeder 22 are aligned.
  • the varnish application device 14 includes a sheet material sensor 42 , a pair of CCD sensors 44 , at least one varnish discharger 46 , a semi-curing UV lamp 48 , and a full-curing UV lamp 50 .
  • the sheet material sensor 42, the pair of CCD sensors 44, the varnish discharger 46, the semi-curing ultraviolet lamp 48, and the main curing ultraviolet lamp 50 are arranged in this order from the upstream side.
  • the varnish coating device 14 includes three varnish dispensing units 46, but the present invention is not limited to this, and the varnish coating device 14 includes one varnish dispensing unit 46 extending over the entire area in the width direction X. may be included, or two or four or more varnish dispensers 46 may be included.
  • the semi-curing ultraviolet lamp 48 and the main curing ultraviolet lamp 50 are LEDs that emit ultraviolet rays, but 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 supplied from the sheet material supply device 12 and carried out from the registration section 24 .
  • the varnish ejection unit 46 is a line-type inkjet head in the illustrated example.
  • the varnish dispensing unit 46 is triggered by detection of the leading edge of the sheet material by the sheet material sensor 42, and dispenses ultraviolet curable varnish according to the varnish dispensing data to apply 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 references for specifying the position of the base image may be printed in advance on the sheet material supplied by the sheet material supply device 12 .
  • the varnish applicator 14 applies varnish so as to have a predetermined relationship with the base image according to varnish discharge data that defines the varnish applied portion of the sheet material. You may
  • the base image of the sheet material may be misaligned or distorted. Therefore, when applying varnish so as to have a predetermined relationship with the background image, it is necessary to correct the varnish ejection data in consideration of deviation and distortion.
  • the CCD sensor 44 captures an image of the sheet material triggered by the detection of the sheet material by the sheet material sensor 42, and the control device 20 analyzes the image data captured by the CCD sensor 44 to determine the theoretical positions of the plurality of registration marks. Due to the difference, the varnish ejection data in the area surrounded by the registration marks may be corrected. Note that the method described in Japanese Patent Laid-Open No. 2016-083898 previously filed by the present applicant can be applied to this correction.
  • the semi-curing ultraviolet lamp 48 irradiates the varnish on the sheet material with relatively weak ultraviolet rays to semi-cure the varnish.
  • Semi-curing refers to lightly curing the varnish to such an extent that the fluidity of the varnish is reduced but the varnish is not completely cured (for example, to a state in which further curing is possible). By semi-curing at least the surface of the varnish, it is possible to prevent the varnish from flowing over the sheet material and stabilize the position of the varnish on the sheet material while maintaining the tackiness of the varnish.
  • the semi-cured varnish is fully cured in the foil stamping device 16 .
  • the semi-curing UV lamp 48 is normally turned off, but the semi-curing UV lamp 48 may be used when the sheet material is not foil stamped. For example, if the varnish applied to the sheet material tends to bleed, the semi-curing UV lamp 48 is turned on to semi-cure at least the surface of the varnish. As a result, bleeding of the varnish can be suppressed.
  • the final curing ultraviolet lamp 50 irradiates the varnish applied to the sheet material with ultraviolet rays to fully cure the varnish.
  • the main curing ultraviolet lamp 50 is turned off.
  • the semi-cured 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 .
  • the main curing ultraviolet lamp 50 is turned off.
  • the semi-curing ultraviolet lamp 48 and the foil stamping ultraviolet lamp 66 of the foil stamping device 16 are turned off.
  • the semi-curing UV lamp 48 may be turned on even when foil stamping is not being done.
  • an LED for irradiating 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 irradiate ultraviolet rays.
  • the foil stamping device 16 conveys the web 52 roll-to-roll.
  • the web 52 is a foil holding film in which a foil (for example, metal foil) is held on the film.
  • a foil for example, metal foil
  • the web 52 and the sheet material are conveyed and brought into contact with each other.
  • the foil held by the web 52 adheres to the semi-cured varnish on the sheet material due to its tackiness.
  • the foil stamping ultraviolet lamp 66 irradiates the varnish with ultraviolet rays to fully cure the varnish.
  • the force of the fully cured varnish to adhere the foil is stronger than the force of the web 52 to hold the foil.
  • the sheet material is conveyed and the sheet material and the web 52 are separated, the foil held on the web 52 is transferred to the varnished portion of the sheet material.
  • the stacker 18 accumulates 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 an input regarding the definition of the decoration print job.
  • the control device 20 may display a predetermined job management screen and receive an input regarding the job definition via the job management screen.
  • Job definitions include, for example, the number of sheet materials to be subjected to decorative printing (decorative printing number of copies), sheet information (sheet size, sheet material, sheet material thickness, type of printer that printed the base image and registration mark on the sheet material, printing method of the base image and registration mark, etc.), varnish discharge data, presence or absence of corona treatment, presence or absence of foil stamping, and strength of pinning (Semi-hardening degree of hardening), etc. are included.
  • the controller 20 controls the sheet feeding device 12, the varnishing device 14 and the foil stamping device 16 based on the job definition.
  • the decoration printing system 10 may be provided with a printer for printing the base image and the registration mark on the sheet materials instead of the sheet material supply device 12, and the sheet materials may be supplied one by one from the printer. .
  • the decorative printing system 10 may also include a post-processing device between the foil stamping device 16 and the stacker 18 for cutting and binding sheet materials.
  • FIG. 3 is a front view showing the corona treatment device 26, FIG. 4 is a side view thereof, and FIG. 5 is a cross-sectional view along line AA in FIG. 4 (viewed from the same direction as FIG. 3).
  • the corona treatment device 26 includes two corona treatment parts 102 (an upstream corona treatment part 102 a and a downstream corona treatment part 102 b ), a housing 104 and a suction device 106 . 4, illustration of the upstream side surface of the housing 104 is omitted for easy understanding.
  • the configurations of the upstream corona treatment section 102a and the downstream corona treatment section 102b are the same.
  • the upstream corona treatment section 102a will be described as a representative of both.
  • the same configuration of the downstream corona treatment section 102b is expressed, and when both are collectively expressed, a and b are omitted. and
  • two corona treatment units 102 are provided in the illustrated example, the number of corona treatment units 102 is not particularly limited.
  • the upstream corona treatment section 102a includes a discharge section 110a arranged above the transport path 120, and a power receiving section 112a arranged below the transport path 120 so as to vertically face the discharge section 110a.
  • the length in the width direction X of the discharge portion 110a and the power reception portion 112a is longer than the length in the width direction X of the sheet material, that is, the width of the sheet material.
  • Power receiving unit 112a is not particularly limited as long as it can perform corona discharge with discharge unit 110a.
  • the power receiving portion 112a of the present embodiment has an upper surface 112f whose cross section perpendicular to the width direction X is arcuate.
  • the power receiving unit 112a may be a rotating roller having a circular cross section perpendicular to the width direction X, or may be a non-rotating columnar member. In the case of a cylindrical member that does not rotate, it may be fixed at any angle of rotation. When the surface of the power receiving unit deteriorates due to the corona discharge for a long period of time, by changing the rotation angle and reattaching it, the undegraded portion can be newly made to face the discharge unit 110a. 112a can be used for a long time.
  • the housing 104 includes an upper housing 130 and a lower housing 140 positioned vertically with the sheet material conveying path 120 interposed therebetween.
  • the upper housing 130 is a box-shaped member forming an internal space 130 s and accommodates the discharge section 110 of each corona treatment section 102 .
  • the lower housing 140 is a box-shaped member with an open top, and accommodates the power receiving section 112 of each corona treatment section 102 .
  • a guide plate 108 is provided in the opening of the upper surface of the lower housing 140 .
  • a guide plate 108 supports the underside of the sheet material passing through the corona treater 26 .
  • the guide plate 108 is open at the portion where the discharge section 110 and the power receiving section 112 face each other. With this opening, the pre-corona treatment guide plate 108a on the upstream side of the upstream power receiving portion 112a, the in-corona treatment guide plate 108b positioned between the upstream power receiving portion 112a and the downstream power receiving portion 112b, and the post-corona treatment guide plate 108b are arranged. 108c.
  • a gap between the upstream side surface 130 a of the upper housing 130 and the upstream side surface 140 a of the lower housing 140 constitutes a carry-in port 150 for carrying the sheet material into the housing 104 .
  • a gap between the downstream side surface 130 b of the upper housing 130 and the downstream side surface 140 b of the lower housing 140 constitutes a discharge port 152 for discharging the sheet material out of the housing 104 .
  • a conveying means for conveying the sheet material from the feeder 22 toward the carry-in port 150 is provided on the upstream side of the carry-in port 150 .
  • a conveying means for conveying the sheet material to the registration section 24 is provided on the downstream side of the carry-out port 152 .
  • the sheet material is carried into the housing 104 through the inlet 150 while being supported by the guide plate 108, passes between the discharge section 110 and the power receiving section 112 of the two corona treatment sections 102, and exits the housing through the outlet 152. 104 is carried out.
  • the upper surface of the guide plate 108 constitutes a transport path 120 along which the sheet material is transported.
  • corona treatment When the sheet material is conveyed between the discharge section 110 and the power reception section 112 of the corona treatment section 102, if a high frequency voltage is applied to the discharge section 110, corona discharge occurs between the discharge section 110 and the power reception section 112.
  • the surface (upper surface) of the sheet material that is generated and moves along the surface of power receiving unit 112 is subjected to corona treatment. Since the discharge portion 110 and the power receiving portion 112 have a width equal to or greater than that of the sheet material, corona treatment is applied to the entire surface of the sheet material as the sheet material is conveyed.
  • ozone (O3) is generated in the air inside the housing 104 .
  • a first exhaust port 160 is formed in the housing 104 on the side of the discharge section 110 (that is, above the conveying path 120). Specifically, a first exhaust port 160 is formed in the upper housing 130 . In the illustrated example, a first exhaust port 160 is formed on the upper surface of the upper housing fixing portion 134 . A plurality of first exhaust ports 160 may be provided in the housing 104 . For example, a plurality of first exhaust ports 160 may be formed in the upper housing fixing portion 134 so as to be aligned in the width direction X. As shown in FIG.
  • first exhaust ports 160 may be formed in the upper housing fixing portion 134 so as to be aligned in the transport direction Y. As shown in FIG. In this case, a first exhaust port 160 may be formed above each corona treatment unit 102 .
  • the housing 104 is formed with a second exhaust port 162 on the side of the power receiving unit 112 (that is, below the transport path 120). That is, the second exhaust port 162 is formed in the lower housing 140 .
  • a second exhaust port 162 is formed on the lower surface of the lower housing 140 .
  • a plurality of second exhaust ports 162 may be provided in the housing 104 .
  • a plurality of second exhaust ports 162 may be formed in the lower housing 140 so as to be aligned in the width direction X.
  • a plurality of second exhaust ports 162 may be formed in the lower housing 140 so as to be aligned in the transport direction Y. As shown in FIG. In this case, a second exhaust port 162 may be formed below each corona treatment unit 102 .
  • Gas containing ozone in the housing 104 is sucked and discharged from the first exhaust port 160 and the second exhaust port 162 by the suction device 106 .
  • the suction and evacuation of gas within the housing 104 also has the effect of cooling the corona treatment section 102 .
  • At least one of the first exhaust port 160 and the second exhaust port 162 is provided with a pressure gauge (not shown). This pressure gauge interrupts corona discharge when the pressure at the first exhaust port 160 or the second exhaust port 162 falls below a predetermined pressure.
  • the amount of gas sucked from 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, when the sheet material is not carried into the housing 104 ( That is, when the opening on the upper surface of the lower housing 140 is not blocked), the second exhaust port on the power receiving unit 112 side (lower side) than the exhaust amount from the first exhaust port 160 on the discharge unit 110 side (upper side) Increase the exhaust volume from 162.
  • a negative pressure is generated in the gap to suck toward the lower internal space 140 s, which is the internal space of the lower housing 140 . Since the sheet material conveyed on the conveying path 120 is attracted to this negative pressure, the sheet material passing between the discharge unit 110 and the power receiving unit 112 can be prevented from floating from the power receiving unit 112 . As a result, the sheet material slides on the power receiving portion 112, and stable corona discharge can be obtained on the surface (upper surface) side of the sheet material.
  • the corona treatment device 26 has a gap adjustment mechanism 200 that adjusts the gap between the discharge section 110 of the corona treatment section 102 and the power receiving section 112 .
  • Two gap adjusting mechanisms 200 are arranged side by side in the transport direction Y (an upstream gap adjusting mechanism 200a and a downstream gap adjusting mechanism 200b).
  • the upstream spacing adjustment mechanism 200a adjusts the spacing between the discharge section 110a and the power receiving section 112a of the upstream corona treatment section 102a.
  • the downstream spacing adjustment mechanism 200b adjusts the spacing between the discharge section 110b and the power receiving section 112b of the downstream corona treatment section 102b.
  • the configurations of the upstream spacing adjustment mechanism 200a and the downstream spacing adjustment mechanism 200b are the same.
  • the upstream-side interval adjusting mechanism 200a will be described as a representative of both.
  • the upstream spacing adjustment mechanism 200a includes a first support member 202a, a second support member 204a, two fine adjustment mechanisms 206a (Figs. 4 and 5), and a vertical movement mechanism 208a (Figs. 3 and 4).
  • the first support member 202a is elongated in the width direction X, and the discharge section 110a is fixedly suspended below it.
  • the second support member 204a is elongated in the width direction X and provided above the first support member 202a with an appropriate space therebetween.
  • the left end of the second support member 204a in the width direction X passes through a square hole 130ax formed in the left side surface 130x of the upper housing 130 and extends outward to the left.
  • the right end of the second support member 204a in the width direction X passes through a square hole 103ay formed in the right side surface 130y of the upper housing 130 and extends to the right outside.
  • the fine adjustment mechanism 206a enables fine adjustment of the spacing between the first support member 202a and the second support member 204a.
  • the fine adjustment mechanism 206a is provided at two locations, a left fine adjustment mechanism 206ax and a right fine adjustment mechanism 206ay. placed respectively.
  • the left fine adjustment mechanism 206ax and the right fine adjustment mechanism 206ay have the same configuration.
  • the left fine adjustment mechanism 206ax will be described as a representative of both.
  • a screw 210ax is inserted through a hole 204ax drilled in the second support member 204a.
  • a tip of the screw 210ax is screwed into a female screw portion 202ax formed in the first support member 202a.
  • a compression spring 212ax is interposed between the first support member 202a and the second support member 204a so as to surround the screw 210ax.
  • a predetermined distance is maintained between the first support member 202a and the second support member 204a by the pressing force of the push spring 212ax, and the distance can be adjusted by turning the screw 210ax.
  • An appropriate opening is provided in the upper housing 130, and the user can turn the screw 210ax of the left fine adjustment mechanism 206ax and the screw 210ay of the right fine adjustment mechanism 206ay through these openings.
  • By turning the screws 210ax and 210ay it is possible to finely adjust the horizontal spacing between the first support member 202a and the second support member 204a. Therefore, it is possible to finely adjust the angle in the width direction X of the first support member 202a and the discharge section 110a suspended therefrom with respect to the second support member 204a. As a result, it is possible to adjust the parallelism of the discharge portion 110a with respect to the fixed power receiving portion 112a.
  • the vertical movement mechanism 208a supports both the left extension portion and the right extension portion of the second support member 204a in order to adjust the distance between the discharge portion 110a and the power reception portion 112a, and moves the second support member 204a vertically. mechanism.
  • the distance between the discharge portion 110 (110a, 110b) and the power reception portion 112 (112a, 112b) is defined by the lower surface (discharge surface) of the discharge portion 110 (110a, 110b) and the arc-shaped power reception portion. It is the distance to the top of the 112 top surface (112f).
  • a timing belt 218a is fixed to the left extension of the second support member 204a.
  • Timing belt 218a is entrained between upper pulley 214a and lower pulley 216a, which rotate about an axis supported on left side 130x.
  • a guide shaft 220a having an axial direction directed vertically is inserted through the second support member 204a via a slide bearing 226a.
  • the guide shaft 220a is fixed to the left side surface 130x via fixing members 222a and 224a.
  • a gear 230a and a sensor plate 232a are supported on a shaft 228a that supports the pulley 214a.
  • the gear 230a meshes with the output gear 234a of the motor Ma.
  • the sensor plate 232a is a disc with one cutout in the circumferential direction, and a sensor 236a is provided on the peripheral edge thereof so as to block the optical axis.
  • the rotation direction in which the motor Ma drives the timing belt 218a clockwise is referred to as "forward rotation”
  • the rotation direction in which the timing belt 218a is rotated counterclockwise is referred to as “reverse rotation”.
  • the gear 230a rotates
  • the sensor plate 232a also rotates, and the sensor 236a detects when the cutout portion of the sensor plate 232a reaches the optical axis portion. Therefore, the sensor 236a detects that the second support member 204a is at a predetermined height.
  • FIG. 3 shows a state in which the sensor 236a detects the missing portion.
  • the shaft 228a passes through the internal space 130s of the upper housing 130, is also supported by the right side surface 130y, and extends to the outside thereof.
  • a shaft 228a supports a pulley 238a outside the right side surface 130y.
  • a timing belt 242a is entrained between pulley 238a and 240a rotating about an axis supported on right side 130y.
  • the timing belt 242a is fixed to the right extending portion of the second support member 204a.
  • a guide shaft 244a whose axial direction is directed vertically is inserted through the second support member 204a via a slide bearing 246a.
  • the guide shaft 244a is fixed to the right side surface 130y via fixing members 248a and 250a. As the timing belt 242a rotates, the second support member 204a ascends or descends along the guide shaft 244a.
  • the timing belt 218a on the left extension portion and the timing belt 242a on the right extension portion are synchronized with each other so that the second support member 204a is raised or lowered while maintaining a substantially horizontal position.
  • 240a are all configured with the same number of teeth.
  • the discharge unit 110a moves up and down while maintaining a predetermined degree of parallelism with respect to the fixed power reception unit 112a.
  • the configuration of the upstream interval adjustment mechanism 200a Since the configuration of the downstream space adjusting mechanism 200b is the same as that of the upstream space adjusting mechanism 200a, when the motor Mb rotates, the second support member 204b moves up and down while maintaining a substantially horizontal position, and the discharge section 110b is fixed. It moves up and down while maintaining a predetermined degree of parallelism with respect to the power receiving unit 112b.
  • FIG. 6 is a control block diagram according to the embodiment of the present invention.
  • the control device 20 receives and stores sheet information, which is information about sheet materials processed by the decoration printing system 10, as job definition information through a PC 260 as an information processing terminal.
  • the sheet information includes the thickness t of the sheet material.
  • the sheet information may include information regarding the material of the sheet.
  • the sheet information may include base printing information relating to base printing applied to the sheet material prior to decorative printing.
  • Base printing information is, for example, information about a printer used for base printing (type of printer, etc.). In addition, for example, it is a printing method (electrophotography, inkjet, etc.) used for base printing.
  • the job definition information includes other information such as varnish discharge data, foil stamping, and information on pinning processing.
  • the control device 20 controls the motor M of the interval adjustment mechanism 200 of the corona treatment device 26 based on this sheet information.
  • the control device 20 also controls the varnishing device 14 and the foil stamping device 16 .
  • FIG. 7 is a schematic diagram showing the first adjustment control of the vertical movement mechanism 208 based on the thickness t of the sheet material.
  • the discharge unit 110 is located at the home position, and the distance between the discharge unit 110 and the power receiving unit 112 is D0.
  • the home position is the position where the sensor 236 detects that the sensor plate 232 is missing, and is the lowest position in the range in which the discharge section 110 moves up and down.
  • the control device 20 calculates the ascending distance DU from the home position based on Equation 1 below.
  • DU Dref+t ⁇ D0 (Formula 1)
  • Dref is a value preset and stored as a distance at which stable corona discharge can be performed with respect to the upper surface of the sheet material S. As shown in FIG.
  • FIG. 8 is a flow chart showing the first adjustment control.
  • the control device 20 When the control device 20 receives a predetermined adjustment command, it reverses the motor M, causing the timing belt 218 to rotate counterclockwise in FIG. 3 (S1) (the timing belt 242 also rotates in the same direction).
  • the sensor 236 detects that the sensor plate 232 is missing (Y in S2), the motor M is stopped (S3).
  • the discharge unit 110 is at the home position (FIG. 7(a)) (if the optical axis of the sensor 236 is not blocked when the adjustment command is received, before starting the motor reverse rotation of S1, The motor M is once rotated forward until the optical axis of the sensor 236 is blocked).
  • the motor M is rotated forward (S4), and when the number of pulses P reaches the number of pulses PU required to raise the discharge unit 110 by the distance DU (DU1, DU2) calculated by Equation 1 (Y in S5). , the motor M is stopped (S6), and the adjustment control ends.
  • FIG. 7(b) shows a state in which the discharge section 110 is adjusted to a height corresponding to the sheet material S1 having a thickness t1 according to the first adjustment control.
  • the distance between the lower surface of the discharge section 110 and the upper surface of the sheet material S1 is Dref.
  • FIG. 7(c) shows a state in which the discharge section 110 is adjusted to a height corresponding to the sheet material S1 having a thickness t2 that is thicker than the thickness t1, according to the first adjustment control.
  • the distance between the lower surface of the discharge section 110 and the upper surface of the sheet material S1 is Dref.
  • the distance between the discharge section 110 and the upper surface of the sheet material does not change and is maintained at Dref. Therefore, regardless of the thickness of the sheet material, the sheet material does not come into contact with the discharge section 110, and the surface can be modified by stable corona discharge.
  • the home position is designed in advance based on Dref so that D0 is smaller than Dref when thickness t is the thinnest.
  • a jam sensor (not shown) capable of detecting a sheet material conveyed between the discharging section 110 and the power receiving section 112 is provided. If the sheet material comes into contact with the discharge portion 110 and jams, the sheet material remains detected by the jam sensor.
  • the jam sensor stops the decoration printing system 10 as a jam (clogging of the sheet material) error. If the decorative printing system 10 stops due to a jam error, the sheet material is lost, and the varnishing and foil stamping processes for the preceding sheet material are interrupted halfway, resulting in wasted consumables such as varnish and foil. It will be a big loss. Since the present invention can effectively avoid such a jam regardless of the thickness of the sheet material, loss of the sheet material and consumables can be suppressed.
  • the jam sensor is shielded with a metal plate so as not to be affected by discharge. A discharge immune optical fiber may be used to transmit the light of the sensor.
  • the voltage applied to the discharge part 110 should be a voltage that can obtain a stable corona discharge even with the gap between the discharge part 110 and the power receiving part 112 adjusted according to the maximum thickness t of the applicable sheet material. is desirable.
  • the applied voltage may be controlled to be higher as the thickness t of the sheet material increases.
  • FIG. 9 is a schematic diagram showing second adjustment control, which is a control example different from the first adjustment control.
  • the discharge unit 110 is located at the home position, and the distance between the discharge unit 110 and the power receiving unit 112 is D0.
  • the second adjustment control if the sum of the thickness t and the predetermined Dref is D0 or less, the discharge section 110 is not raised, and if it exceeds D0, the discharge section 110 is raised by the excess amount.
  • FIG. 9(b) is a diagram in the case of applying a sheet material S1 having a thickness t1 where Dref+t1 ⁇ D0.
  • FIG. 9(c) is a diagram in the case of applying a sheet material S2 having a thickness t2 that is thicker than the thickness t1 and that satisfies Dref+t2>D0.
  • the discharge unit 110 rises from the home position by the amount that t2+Dref exceeds D0 (Dref+t2-D0).
  • Dref in the second adjustment control is designed in advance as the minimum required distance to enable surface modification by stable corona discharge and to reliably prevent the sheet material from coming into contact with the discharge section 110. . Therefore, in the second adjustment control, it is possible to control the distance between discharging unit 110 and power receiving unit 112 so as not to fall below Dref.
  • FIG. 10 is a flow chart showing the second adjustment control.
  • the motor M is reversed (S1), and when the sensor 236 detects that the sensor plate 232 is missing (Y in S2), the motor M is stopped (S3). Thereafter, it is determined whether or not Dref+t1>D0 (S31), and if Y, the same control as S4 to S6 of the first adjustment control (FIG. 8) is performed. If N, end the adjustment control. Therefore, when Dref+t1>D0, the adjustment control ends while discharging unit 110 remains at the home position (the distance between discharging unit 110 and power receiving unit 112 remains D0).
  • the job definition file containing the thickness t of the sheet material is input by being sent from the printer that performs base printing through a communication line or by reading from a file separately managed by the user. Alternatively, it may be directly input by the user through the PC 260 or a separately provided operation panel or the like. Alternatively, a thickness detection mechanism for detecting the thickness t of the sheet material fed from the feeder 22 is provided on the upstream side of the corona treatment device 26, and before the sheet material enters between the discharge section 110 and the power receiving section 112, , the adjustment control may be performed based on the thickness t acquired by this thickness detection mechanism.
  • Additional adjustment by the user may be allowed after the first or second adjustment control.
  • the motor M is slightly rotated forward or reverse, and the discharge section 110 is slightly raised or lowered.
  • the height of the discharge portion 110 may be restricted so as not to be lower than a predetermined height so as not to be narrower than the distance necessary to avoid contact between the discharge portion 110 and the sheet material.
  • the effect of improving wettability by corona discharge may change depending on the material of the base sheet and the type of base printing (electrophotography, inkjet, etc.). It is also known that environmental conditions, particularly humidity, affect the dielectric breakdown distance over which corona discharge can occur. By additionally adjusting the distance between the discharge unit 110 and the power receiving unit 112 according to these conditions, a better wettability improvement effect can be obtained.
  • the sheet material, the model of the printer that performed the base printing, the type of printing, the environmental conditions, and other factors that can affect the wettability improvement effect may be made automatically.
  • the content of the additional adjustment is created based on the relationship between the improvement effect and the content of the additional adjustment obtained from experiments, and is referred to a pre-stored table or the like.
  • the material of the sheet, the model of the printer that performed the base printing, the type of printing, etc. may refer to those included in the job definition file, or may be input by the user.
  • Environmental conditions such as humidity may refer to information obtained from a measuring device such as a hygrometer, or may be input by the user.
  • the distance between the discharge unit 110 and the power receiving unit 112 is a more appropriate distance that takes into account the material of the sheet material, information on base printing, environmental conditions, etc., in addition to the thickness t of the sheet material. adjustment control is possible.
  • the thickness t of the sheet material is considered in the adjustment control. you don't have to.
  • factors other than the thickness t of the sheet material namely, the material of the sheet, the model of the printer that performed the base printing, the type of printing, weather conditions, etc. are referred to.
  • spacing adjustments may be made accordingly.
  • the gap adjustment mechanism 200 of the present invention has a fine adjustment mechanism 206 in addition to the vertical movement mechanism 208 described above and its adjustment control, and adjusts the parallelism between the discharge section 110 and the power reception section 112 which are mutually long in the width direction X. It is possible. In order to obtain a stable corona discharge over the entire width in the X direction, the distance between the discharge part 110 and the power receiving part 112 should be constant regardless of the position in the X direction, that is, they should be parallel to each other. According to the present invention, the fine adjustment mechanism 206 allows the discharge section 110 and the power reception section 112 to be made parallel in advance according to the manufacturing error of the members constituting the vertical movement mechanism 208 .
  • the effect of improving the wettability is stronger on one side than on the other side. It is also possible to obtain (or vice versa).
  • interval adjusting mechanism 200 The configuration and function of the interval adjusting mechanism 200 described above are common to the upstream interval adjusting mechanism 200a and the downstream interval adjusting mechanism 200b. Further, it is assumed that the adjustment control of the vertical motion mechanism 208 is performed simultaneously with the upstream vertical motion mechanism 208a and the downstream vertical motion mechanism 208b.
  • each Dref may be set in advance so that the distance between the upstream discharge portion 110a and the downstream discharge portion 110b is intentionally different.
  • gap adjusting mechanism 300 which is a modification of the gap adjusting mechanism 200, will be described.
  • the same members as those of the gap adjusting mechanism 200 are denoted by the same reference numerals, and detailed descriptions thereof are omitted, and differences from the gap adjusting mechanism 200 are mainly described.
  • the gap adjusting mechanism 300 has two (upstream side gap adjusting mechanism 300a, downstream side gap adjusting mechanism 300b) arranged side by side in the transport direction Y, and has the same configuration.
  • the upstream-side interval adjusting mechanism 300a will be described as a representative of both.
  • the upstream spacing adjustment mechanism 300a does not include the first support member 202a, the second support member 204a, and the fine adjustment mechanism 206, but instead includes the support member 302a.
  • the support member 302a has a configuration in which the first support member 202a and the second support member 204a are integrated. Further, the upstream interval adjusting mechanism 300a has an upper left and lower movement mechanism 308ax and an upper right and lower movement mechanism 308ay instead of the vertical movement mechanism 208a.
  • the upper left end of the support member 302a passes through a square hole 130ax formed in the left side surface 130x of the upper housing 130 and extends outward to the left.
  • the upper right end of the support member 202a extends right outside through a square hole 103ay formed in the right side surface 130y of the upper housing 130. As shown in FIG.
  • the vertical movement mechanism 308ax is provided outside the left side surface 130x of the housing 130, and supports the left extending portion of the support member 202a so as to be vertically movable.
  • the vertical movement mechanism 308ay is provided outside the right side surface 130y of the housing 130, and supports the right extending portion of the support member 202a so as to be vertically movable.
  • Vertical movement mechanisms 308ax and 308ay synchronize with each other to vertically move support member 202a to adjust the distance between discharge section 110a and power reception section 112a.
  • the vertical movement mechanism 308ax is provided with a shaft 328ax only outside the left side surface 130x instead of the shaft 228a in the vertical movement mechanism 208a.
  • Gear 330ax, sensor plate 332ax, output gear 334ax, sensor 336ax, and motor Max are the same members as gear 230a, sensor plate 232a, output gear 234a, and motor Ma, respectively.
  • a shaft 328 ay , a gear 330 ay , a gear 330 ay , a gear 330 ay , and a gear 330 ay are mounted on the outer side of the right side surface 130 y so as to be line-symmetrical about the center in the width direction X with respect to the shaft 328 ax, the gear 330 ax, the sensor plate 332 ax, the output gear 334 ax, the sensor 336 ax, and the motor Max.
  • a sensor plate 332ay, an output gear 334ay, a sensor 336ay, and a motor May are provided.
  • the vertical movement mechanisms 308ax and 308ay are linearly symmetrical with respect to the center in the width direction X, and the vertical movement mechanism 308ax drives the motor Max to extend the support member 302a to the left.
  • a vertical movement mechanism 308ay drives a motor May to individually vertically move the right extending portion of the support member 302a.
  • guide members 326ax and 326ay guide the support member 202a from the upstream side and the downstream side in the transport direction Y so as to sandwich it.
  • the configurations of the vertical movement mechanisms 308ax and 308ay other than the above are the same as the vertical movement mechanism 208a.
  • the configuration of the downstream side interval adjusting mechanism 300b is also the same. That is, the left extending portion and the right extending portion of the support member 302b can be vertically moved individually by the motor Mbx of the vertical movement mechanism 308bx and the motor Mby of the vertical movement mechanism 308by.
  • the same first adjustment control or second adjustment control as in the vertical movement mechanism 208, or adjustment control based on factors other than the thickness of the sheet material, and additional adjustment as necessary are performed simultaneously on the left and right sides. conduct.
  • the left and right support members 302a can be individually adjusted. You can set the value.
  • the user may be allowed to individually perform additional left and right adjustments from the PC 260, the operation panel, or the like.
  • the parallelism adjustment by the manual fine adjustment mechanism 206 can be automated in the interval adjustment mechanism 300 .
  • Corona treatment device 102 Corona treatment unit 110: Discharge unit 112: Power receiving unit 200: Spacing adjustment mechanism 202: First support member 204: Second support member 206: Fine adjustment mechanism 208: Vertical movement mechanism

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PCT/JP2022/039553 2021-10-29 2022-10-24 放電処理装置及びシート材処理システム Ceased WO2023074632A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026037713A1 (en) 2024-08-14 2026-02-19 Canon Production Printing Holding B.V. Sheet surface treatment apparatus

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JPH05214131A (ja) * 1992-02-04 1993-08-24 Toray Ind Inc プラスチックフィルムの放電処理装置
JPH07119021A (ja) * 1993-08-24 1995-05-09 Toray Ind Inc 放電処理装置および放電処理方法
JP2002226615A (ja) * 2001-01-31 2002-08-14 Mitsubishi Heavy Ind Ltd コロナ放電電極、コロナ放電方法及びシートキャスティング機
JP2007103205A (ja) * 2005-10-05 2007-04-19 Kasuga Electric Works Ltd フィルム等の長尺処理対象物の表面処理装置
JP2011209645A (ja) * 2010-03-30 2011-10-20 Hoya Corp プラスチックレンズ用染料塗布装置
JP2015510458A (ja) * 2012-01-13 2015-04-09 オセ−テクノロジーズ ビーブイ コロナ処理装置
JP2019155785A (ja) * 2018-03-14 2019-09-19 コニカミノルタ株式会社 搬送装置及び画像形成装置
JP2021167248A (ja) * 2020-04-09 2021-10-21 株式会社デュプロ 転写装置および箔押し装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05214131A (ja) * 1992-02-04 1993-08-24 Toray Ind Inc プラスチックフィルムの放電処理装置
JPH07119021A (ja) * 1993-08-24 1995-05-09 Toray Ind Inc 放電処理装置および放電処理方法
JP2002226615A (ja) * 2001-01-31 2002-08-14 Mitsubishi Heavy Ind Ltd コロナ放電電極、コロナ放電方法及びシートキャスティング機
JP2007103205A (ja) * 2005-10-05 2007-04-19 Kasuga Electric Works Ltd フィルム等の長尺処理対象物の表面処理装置
JP2011209645A (ja) * 2010-03-30 2011-10-20 Hoya Corp プラスチックレンズ用染料塗布装置
JP2015510458A (ja) * 2012-01-13 2015-04-09 オセ−テクノロジーズ ビーブイ コロナ処理装置
JP2019155785A (ja) * 2018-03-14 2019-09-19 コニカミノルタ株式会社 搬送装置及び画像形成装置
JP2021167248A (ja) * 2020-04-09 2021-10-21 株式会社デュプロ 転写装置および箔押し装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026037713A1 (en) 2024-08-14 2026-02-19 Canon Production Printing Holding B.V. Sheet surface treatment apparatus

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