JP2009143182A - Coating device and printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the use of each merit of a chamber coater type or of a roll coater type and suppress each demerit thereof. <P>SOLUTION: This coating device is equipped with both a chamber coater unit 21 and a roll coater unit 22 and, at the same time, with an exchanging mechanism 23 for exchanging the anilox roller 211 of the chamber coater unit 21 with the coating roller 221 of the roll coater unit 22. As a result, either the chamber coater unit 21 or the roll coater unit 22 can be used selectively, the coating flexibility coping with various kinds of printed materials becomes possible and versatile coating work responding to the requirement of a user can be executed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coating apparatus and a printing press.

  For example, a coating apparatus for coating a sheet with a coating liquid (for example, varnish) is known in order to prevent the printed sheet from being stained or to improve the appearance.

  Conventionally, in this type of coating apparatus, there is a so-called chamber coater type in which a coating liquid stored in a chamber apparatus is sequentially conveyed to an anilox roller and a varnish plate cylinder and applied onto a sheet surface (for example, Patent Document 1).

  Also, conventionally, other coating apparatuses are of a so-called roll coater type in which the varnish stored in the varnish boat is sequentially conveyed to the varnish base roller, the varnishing roller and the varnish plate cylinder and applied to the surface of the sheet. (See, for example, Patent Document 2).

JP 2007-90881 A JP 2007-14922 A

  The chamber coater type coating apparatus shown in Patent Document 1 described above receives a certain amount of coating liquid in a plurality of cells formed on the peripheral surface of the anilox roller, and therefore, unevenness is hardly generated in the applied coating, and The coating thickness is uniform. However, since the chamber coater type coating device needs to be replaced with an anilox roller with a different cell size when changing the film thickness, it takes time for the replacement work, and prepare several expensive anilox rollers. Therefore, there is a problem that the equipment cost increases.

  On the other hand, the roll coater-type coating apparatus disclosed in Patent Document 2 described above changes the nip pressure between the varnish roller and the varnish roller and the nip pressure between the varnish roller and the varnish plate cylinder to change the coating thickness. Can be easily changed, and since there is no need to replace the varnishing roller, the equipment cost is low. However, the roll coater type coating device cannot easily fix the coating solution on the peripheral surface of the varnishing roller when the coating thickness is increased, and the coating solution is likely to scatter and unevenness occurs. Compared with the chamber coater type, there is a problem that the uniformity of the coating film thickness is inferior.

  Thus, since the chamber coater type and the roll coater type have advantages and disadvantages on the front and back sides, it is difficult to meet the user's request alone.

  The present invention solves the above-described problems, and an object of the present invention is to provide a coating apparatus and a printing machine that take advantage of the advantages of the chamber coater type and the roll coater type and suppress the disadvantages.

  In order to achieve the above-described object, in the coating apparatus of the present invention, a chamber coater unit having a chamber for supplying a coating liquid, and an anilox roller for transferring the coating liquid supplied from the chamber to the peripheral surface of the varnish plate cylinder; A roll having a storage section for storing the coating liquid, a feed roller for feeding the coating liquid from the storage section, and a form roller for transferring the coating liquid supplied from the feeding roller to the circumferential surface of the varnish plate cylinder A coater unit, a pressure cylinder that conveys the sheet and applies the coating liquid transferred to the varnish plate cylinder to the sheet, and supports the anilox roller and the application roller detachably with respect to the apparatus frame; and An exchange mechanism for exchanging the anilox roller and the wearing roller is provided.

  The coating apparatus includes a chamber coater unit and a roll coater unit, and an exchange mechanism for exchanging the anilox roller of the chamber coater unit and the wearing roller of the roll coater unit. And can be used selectively. As a result, a wide variety of printed materials can be coated flexibly, and a wide range of coating operations can be performed.

  In addition, if the chamber coater unit and the roll coater unit are unitized and provided so as to be detachable from the apparatus frame, the roll coater unit is removed when only the chamber coater unit is required. When required, the chamber coater unit is removed, and when both units are required, both units are attached to meet the user's request.

  In the coating apparatus of the present invention, the chamber of the chamber coater unit is disposed on the upstream side in the sheet conveying direction with respect to the position where the anilox roller or the form roller is disposed, and the chamber is arranged in the sheet conveying direction. The storage unit of the roll coater unit and the feed roller are arranged on the downstream side.

  The chamber coater unit is limited in the lower region near the varnish plate cylinder due to the structural restrictions of the chamber. On the other hand, the roll coater unit can secure an empty space in a lower region near the varnish plate cylinder as compared with the chamber coater unit. Further, for example, in a printing machine, a working space is relatively narrow because a printing unit and a drying unit having a relatively high height are arranged upstream of the coating unit in the sheet conveyance direction. On the other hand, on the downstream side in the sheet conveyance direction with respect to the coating unit, a relatively low drying unit that conveys the sheet from the impression cylinder by the chain gripper is disposed, so that the work space is relatively wide. Therefore, by arranging the roll coater unit on the downstream side in the sheet conveyance direction, an empty space can be secured in the lower area near the varnish plate cylinder, and a work space can be secured on the downstream side in the sheet conveyance direction. It is possible to easily perform plate replacement work for attaching and detaching the coated plate to the cylinder and maintenance work such as inspection.

  In the coating apparatus of the present invention, the anilox roller and the form roller are parallel to the axis of the varnish plate cylinder and above the axis of the varnish plate cylinder above the horizontally disposed varnish plate cylinder. The axial center is arranged substantially on the vertical line.

  In this coating apparatus, chambers, storage units, and feed rollers can be arranged on the upstream side and the downstream side in the conveyance direction of the sheet on which the anilox roller and the form roller are arranged. The chamber coater unit and the roll coater unit can be provided together.

  In the coating apparatus of the present invention, the exchange mechanism has a housing portion that houses a plurality of anilox rollers for replacement.

  This coating apparatus can easily replace an anilox roller by accommodating a plurality of anilox rollers for replacement.

  In the coating apparatus of the present invention, the roll coater unit is provided with a leveling roller that contacts the circumferential surface of the feed roller and smoothes the thickness of the coating solution supplied to the feed roller. To do.

  The roll coater unit of this coating apparatus is provided with a leveling roller, so that the thickness of the coating liquid on the peripheral surface of the feed roller is leveled, and the coating liquid supplied to the varnish plate cylinder via the dosing roller is supplied. Quantified. For this reason, the film pressure of the coating liquid applied to the sheet is made uniform, and the occurrence of unevenness is suppressed.

  In the coating apparatus of the present invention, the roll coater unit is provided with an adjustment member that adjusts the thickness of the coating solution supplied to the coating roller in contact with the circumferential surface of the coating roller. .

  In this coating apparatus, by providing the adjusting member, the thickness of the coating solution on the peripheral surface of the form roller is scraped and adjusted, and the coating solution supplied to the varnish plate cylinder is quantified. For this reason, the film pressure of the coating liquid applied to the sheet is made uniform, and the occurrence of unevenness is suppressed.

  In the coating apparatus of the present invention, the feed roller and the leveling roller are rotated in the same direction in the roll coater unit.

  In this coating apparatus, when the leveling roller is rotated in the same direction as the feed roller, the coating liquid acts to scrape off the coating liquid on the peripheral surface of the feed roller. It can be improved.

  In the coating apparatus of the present invention, in the roll coater unit, the peripheral speed of the leveling roller is made faster than the peripheral speed of the feed roller.

  This coating device acts to scrape off the coating liquid on the peripheral surface of the feed roller when the peripheral speed of the leveling roller is higher than the peripheral speed of the feed roller. The effect can be further improved.

  In the coating apparatus of the present invention, the replacement mechanism is configured to remove the anilox roller and the form roller from the apparatus frame by moving the roll up and the feed roller of the roll coater unit is the form roller. It is characterized in that the shaft center is provided at a position below the shaft center.

  In this coating apparatus, when the anilox roller and the attaching roller are attached to and detached from the apparatus frame, the amount of movement for moving the feed roller to the separation position so as not to collide with the anilox roller and the attaching roller can be reduced as much as possible, and the apparatus can be downsized. I can plan. In addition, the feed roller can be arranged without protruding from above the opening of the storage section, and the storage section can be arranged without contacting the wearing roller.

  Further, in the coating apparatus of the present invention, in the roll coater unit, the shaft center is disposed at a position below the shaft center of the feed roller and is in contact with the circumferential surface of the feed roller in the same direction as the feed roller. The doctor roller that rotates and adjusts the film thickness of the coating solution that is fed from the feed roller, forms both side walls of the storage section, and contacts the circumferential surface of the feed roller and the doctor roller to contact the feed roller and the doctor It is characterized in that a regulating plate is provided which is arranged in such a manner as to seal a contact portion with the roller.

  In this coating apparatus, the feed roller is arranged at a position protruding from the upper part of the opening of the storage part to the side of the form roller, and the axis of the feed roller is arranged at a position higher than the axis of the form roller. It can be arranged without contacting the roller. If the axis of the feed roller is higher than the axis of the form roller, the area below the reservoir can be obtained as a wide empty space. Replacement work and maintenance work such as inspection can be performed easily.

  Further, in the coating apparatus of the present invention, the restriction plate has a portion where a contact portion between the feed roller and the doctor roller is sealed thinner than other portions, and the feed roller and the doctor roller It is urged | biased by the urging | biasing means in the aspect which contacts the surrounding surface of this.

  In this coating apparatus, the portion that seals the contact portion between the feed roller and the doctor roller is formed to be thinner than the other portions, so that it easily wears against contact with the feed roller and the form roller. The feeding roller and the forming roller can be protected, and the strength can be secured because the other portions are thick. Furthermore, by applying the urging means so as to contact the peripheral surfaces of the feed roller and the dosing roller, the leakage of the coating liquid from the contact portion between the feed roller and the doctor roller can be reliably sealed.

  In order to achieve the above object, in the printing machine according to the present invention, a sheet feeding unit that supplies a sheet, and a sheet that is supplied from the sheet feeding unit while supplying ink to a printing plate wound around a plate cylinder. In a printing machine comprising a printing unit that prints on a sheet and a paper discharge unit that discharges the sheet that has been printed by the printing unit, the coating apparatus having any one of the above configurations is connected to the printing unit and the discharge unit. A drying unit is disposed between the coating apparatus and the paper discharge unit, and is disposed in such a manner that the coating liquid is applied to the sheet conveyed between the paper unit and the coating liquid applied to the sheet. It is characterized by being arranged.

  This printing machine can selectively use a chamber coater unit and a roll coater unit, and can perform a wide range of coating operations according to the user's request by taking advantage of the advantages of the chamber coater type and the roll coater type. Also, by arranging the roll coater unit on the downstream side in the sheet conveying direction, an empty space can be secured in the lower area near the varnish plate cylinder, and plate replacement work for attaching and detaching the coating plate to the varnish plate cylinder, Maintenance work such as inspection can be easily performed. In addition, chambers, storage units, and feed rollers can be arranged on the upstream and downstream sides in the sheet conveyance direction where the anilox roller and the dosing roller are arranged, and the chamber can be formed without unnecessarily increasing the size of the apparatus. Both a coater unit and a roll coater unit can be provided. Further, by storing a plurality of replacement anilox rollers, the anilox roller can be easily replaced. Further, since the coating liquid on the peripheral surface of the feed roller is leveled by the leveling roller and the coating liquid supplied to the varnish plate cylinder via the form roller is quantified, the coating liquid applied to the sheet The film pressure is made uniform, and the occurrence of unevenness is suppressed. In addition, the film thickness of the coating liquid on the peripheral surface of the form roller is scraped and adjusted by the adjusting member, and the coating liquid supplied to the varnish plate cylinder is quantified. Is made uniform and the occurrence of unevenness is suppressed. Also, since the leveling roller rotates in the same direction as the feed roller, the coating liquid acts on the peripheral surface of the feed roller so as to scrape off, so that the leveling effect of the coating liquid on the peripheral surface of the feed roller can be further improved. . In addition, by making the peripheral speed of the leveling roller faster than the peripheral speed of the feed roller, it acts to scrape off the coating liquid on the peripheral surface of the feed roller. The effect can be further improved. In addition, when the anilox roller and the attaching roller are attached to and detached from the apparatus frame, the amount of movement for moving the feed roller to the separation position so as not to collide with the anilox roller and the attaching roller can be reduced as much as possible, and the apparatus can be downsized. The feeding roller can be arranged without protruding from above the opening of the storage unit, and the storage unit can be arranged without contacting the wearing roller. In addition, by placing the feed roller at a position protruding from the upper part of the opening of the storage part to the side of the form roller by the regulation plate of the storage part, and arranging the axis of the feed roller at a position higher than the axis of the form roller, The storage portion can be disposed without contacting the wearing roller. If the axis of the feed roller is higher than the axis of the form roller, the area below the reservoir can be obtained as a wide empty space. Replacement work and maintenance work such as inspection can be performed easily. In addition, since the part that seals the contact portion between the feed roller and the doctor roller of the regulation plate is formed thinner than other parts, it is easy to wear against contact with the feed roller and the form roller. The feeding roller and the forming roller can be protected, and the strength can be secured because the other portions are thick. Furthermore, by applying the urging means so as to contact the peripheral surfaces of the feed roller and the dosing roller, the leakage of the coating liquid from the contact portion between the feed roller and the doctor roller can be reliably sealed.

  According to the present invention, the advantages of each of the chamber coater type and the roll coater type can be utilized, and the respective disadvantages can be suppressed.

  Hereinafter, embodiments of a coating apparatus and a printing press according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a schematic view of a printing press according to an embodiment of the present invention. As shown in FIG. 1, a printing machine according to an embodiment of the present invention is a sheet-fed printing machine 1 that performs printing on a sheet S such as a film, art paper, or coated paper in addition to paper for normal use. 10 is a so-called offset sheet-fed printing press including a blanket cylinder 11 and an impression cylinder 12.

  The sheet-fed printing machine 1 includes a sheet feeding unit 2 that feeds out and feeds printing sheets S one by one, a printing unit 3 that performs printing on the sheet S conveyed along the conveyance direction R, and a sheet S The drying unit 4 that dries the printing surface, the coating unit (the coating apparatus of the present invention) 5 that coats the sheet S, the drying unit 61 that dries the coating of the sheet S, and the discharged sheet S. And a paper discharge unit 62.

  The paper feed unit 2 includes a paper feed table 7 and a paper feed mechanism 8. The sheet feed table 7 is for stacking and placing sheets S. The sheet feeding mechanism 8 picks up and supplies the sheets S stacked on the sheet feeding table 7 one by one in order from the top, and uses a separator (paper suction), a cam, a swing gripper, etc., which are not explicitly shown in the drawing. It is configured. The sheet feeding stand 7 is controlled so as to move upward in the vertical direction corresponding to the supply of the sheet S so that the sheet feeding mechanism 8 maintains a substantially constant positional relationship with the sheet S.

  The printing unit 3 includes a plurality of printing units 9 that print different colors to realize color printing. A plurality of printing units 9 are provided along the conveyance direction R of the sheet S for each color to be printed. In the sheet-fed printing press 1 of the present embodiment, for example, four printing units 9 respectively corresponding to four different colors such as BL (black), C (cyan), M (magenta), and Y (yellow) are arranged. Is provided.

  Each printing unit 9 includes a plate cylinder 10, a blanket cylinder 11, and an impression cylinder 12. The plate cylinder 10, the blanket cylinder 11 and the impression cylinder 12 are formed in a cylindrical shape, and each axis is horizontal and is provided so as to intersect the conveyance direction R. The plate cylinder 10, the blanket cylinder 11 and the impression cylinder 12 are arranged in this order from the upper side to the lower side in the vertical direction, the peripheral surfaces of the plate cylinder 10 and the blanket cylinder 11 are in contact with each other, and the blanket cylinder 11 and the pressure cylinder 12 are in contact with each other. The peripheral surface with the trunk | drum 12 is provided so that it may mutually contact. The plate cylinder 10, the blanket cylinder 11, and the impression cylinder 12 are provided so as to be rotatable about respective axis centers.

  The plate cylinder 10 is provided with a printing plate for forming a printed image on the peripheral surface thereof. Each printing unit 9 includes an ink supply device (not shown) including a roller group for supplying ink to the image line portion of the printing plate, and water for supplying dampening water to the non-image line portion of the printing plate. A dampening device (not shown) composed of a group of rollers is provided around the plate cylinder 10. A blanket (not shown) made of an elastic material is attached to the peripheral surface of the blanket cylinder 11. The ink supplied to the image line portion of the printing plate mounted on the plate cylinder 10 is transferred onto the peripheral surface of the blanket. The blanket cylinder 11 transfers the ink to the sheet S using the printing image of the printing plate as a pattern. The impression cylinder 12 applies a predetermined printing pressure to the sheet S in cooperation with the blanket cylinder 11 while sandwiching the sheet S. The impression cylinder 12 is a so-called double cylinder having a diameter twice the diameter of the plate cylinder 10 and the blanket cylinder 11, and a clamping mechanism (not shown) that clamps the leading edge of the sheet S around the pressure cylinder 12 It is provided at two locations on the circumferential surface at substantially symmetrical positions with respect to the axis of the barrel 12.

  Each printing unit 9 further includes an intermediate cylinder 13. The intermediate cylinder 13 is provided so as to be rotatable about its own axis, and the axis is horizontal and intersects with the conveyance direction R. The intermediate cylinder 13 is disposed between the impression cylinders 12 and is provided in contact with the circumferential surface of the impression cylinder 12. The intermediate cylinder 13 has a diameter twice as large as the diameter of the plate cylinder 10 and the blanket cylinder 11, and a clamping mechanism (not shown) that clamps the leading end of the sheet S is outside the diameter and has its own diameter. It is provided at two substantially symmetrical positions with respect to the axis.

  In each printing unit 9, the sheet S supplied from the paper feeding unit 2 is first supplied between the blanket cylinder 11 and the impression cylinder 12 of the printing unit 9 positioned on the most upstream side in the transport direction R. Thereafter, the sheet S is conveyed to the pressure drum 12 of the printing unit 9 on the downstream side via the intermediate cylinder 13 by being transferred to each clamping mechanism, and ink is transferred one after another on the way. The type and arrangement of the impression cylinder 12 and the intermediate cylinder 13 are not limited to the above, and can be changed as appropriate according to the required conveyance path design.

  The drying unit 4 includes a drying device 14. As the drying device 14, for example, an infrared heater or a hot air drying device is used. When ultraviolet curable ink is used, an ultraviolet lamp is also used as the drying device 14. Further, the drying unit 4 includes a transport cylinder 15 having the same configuration as the impression cylinder 12 of the printing unit 9 below the drying device 14. The drying unit 4 uses the drying device 14 to dry the printed sheet S sandwiched between the transport cylinders 15 as a pretreatment for coating. In the drying unit 4, an intermediate cylinder 13 is provided on the upstream side of the conveyance cylinder 15 in the conveyance direction R to transfer the sheet S printed by the most downstream printing unit 9 from the impression cylinder 12 to the conveyance cylinder 15. ing.

  The coating unit (coating apparatus) 5 coats the printing surface of the sheet S dried by the drying unit 4 with a coating solution such as varnish to prevent the printed sheet S from being damaged or to improve the appearance. It is something to apply. The coating unit 5 includes a coating varnish plate cylinder 100 on which a coated plate having a concavo-convex surface is mounted, and a coating pressure for applying a predetermined printing pressure to the sheet S in cooperation with the varnish plate cylinder 100. And a trunk 12. Then, in the process in which the sheet S passes between the varnish plate cylinder 100 and the impression cylinder 12, the coating liquid supplied to the convex surface portion of the coating plate of the varnish plate cylinder 100 is applied to the printing surface of the sheet S. In the coating unit 5, an intermediate cylinder 13 for delivering the sheet S dried by the drying unit 4 from the conveyance cylinder 15 to the impression cylinder 12 is provided on the upstream side in the conveyance direction R of the impression cylinder 12.

  The drying unit 61 includes the above-described drying device 14 between the endless chains 161 of the chain gripper 16 in the paper discharge unit 62 described later. The drying unit 61 dries the coating surface of the sheet S conveyed by the chain gripper 16.

  The paper discharge unit 62 conveys the sheets S coated by the coating unit 5 and stacks them in an aligned state. The paper discharge unit 62 includes a chain gripper 16 that conveys the sheet S, a paper discharge table 17 on which the printed and coated sheets S are stacked, and a fan device 18 that forms a downward airflow in the vicinity of the paper discharge table 17. .

  The chain gripper 16 receives the sheet S from the impression cylinder 12 of the coating unit 5 and conveys the sheet S to a predetermined position above the discharge table 17. In the chain gripper 16, an endless endless chain 161 that moves in a circulation path between a position adjacent to the impression cylinder 12 of the coating unit 5 and a position above the sheet discharge table 17 is disposed opposite to the chain gripper 16. Between each endless chain 161, a gripper 162 having a gripping bar and a claw part for clamping and releasing the sheet S by the gripping bar is supported.

  The paper discharge table 17 is suspended from a chain and configured to be movable in the vertical direction. The sheet discharge stand 17 stacks and places the sheets S discharged from the chain gripper 16. When the top surface height of the uppermost stage rises as the sheets S are stacked, the discharge table 17 is continuously or stepwisely lowered in the vertical direction so that the falling distance of the sheets S becomes substantially constant. It is controlled to move to the side.

  The fan device 18 has a plurality of fans arranged in a substantially rectangular shape, and moves the sheet S discharged from the chain gripper 16 above the discharge table 17 downward in the vertical direction by airflow control.

  In the sheet-fed printing press 1 having such a configuration, the sheets S stacked on the sheet feeding table 7 of the sheet feeding unit 2 are picked up one by one from the top by the sheet feeding mechanism 8 and supplied to the printing unit 3. . The sheet S supplied to the printing unit 3 is sequentially transferred by the clamping mechanism of the impression cylinder 12 and the intermediate cylinder 13 of each printing unit 9, thereby being conveyed through each printing unit 9. Transcribed. In each printing unit 9, a print image obtained by supplying ink to the image line portion of the printing plate of the plate cylinder 10 is transferred to the blanket cylinder 11, and the print image transferred to the blanket cylinder 11 is transferred by the impression cylinder 12. A single color is printed by being transferred to the conveyed sheet S. This is repeated in each printing unit 9 for color printing. After the color-printed sheet S is dried by the drying unit 4, the coating liquid is applied while passing between the varnish plate cylinder 100 and the impression cylinder 12 of the coating unit 5. In the coating unit 5, the coating liquid supplied to the convex portion of the coating plate of the varnish plate cylinder 100 is applied to the sheet S carried by the impression cylinder 12. The coated sheet S is replaced from the impression cylinder 12 of the coating unit 5 to the gripper 162 of the chain gripper 16. The sheet S conveyed by the chain gripper 16 is removed from the upper side of the sheet discharge table 17 and dropped, and is stacked on the sheet discharge table 17. At this time, the coating applied to the sheet S by the drying device 14 is dried.

  Details of the coating unit (coating apparatus) 5 will be described below. 2 is a schematic side view of the coating apparatus, and FIG. 3 is a schematic front view of an exchange mechanism of the coating apparatus shown in FIG.

  As shown in FIG. 2, the coating unit 5 includes a coating liquid supply mechanism 20 that supplies the coating liquid to the convex portions of the coating plate mounted on the varnish plate cylinder 100 in addition to the varnish plate cylinder 100 and the impression cylinder 12 described above. ing. The coating liquid supply mechanism 20 is disposed above the varnish plate cylinder 100 and includes a chamber coater unit 21, a roll coater unit 22, and an exchange mechanism 23.

  The chamber coater unit 21 forms a chamber coater type coating solution supply mechanism, and includes an anilox roller 211 and a chamber 212.

  In the anilox roller 211, honeycomb cells (not shown) divided into a plurality of hexagons, for example, are formed on a circumferential surface of a cylinder having a length equivalent to that of the varnish plate cylinder 100. The cell is for receiving a fixed amount of coating liquid. The anilox roller 211 is disposed above the varnish plate cylinder 100 so that its peripheral surface comes into contact with the coating plate mounted on the peripheral surface of the varnish plate cylinder 100. Specifically, as shown in FIG. 2, the anilox roller 211 has an axis that is parallel to the axis of the varnish plate cylinder 100 that is horizontally disposed, and substantially on the vertical line P of the axis of the varnish plate cylinder 100. Is arranged. Here, “substantially” of being arranged on the vertical line P includes a range α of 30 degrees that is a range of ± 15 degrees centered on the vertical line P, and the varnish plate cylinder in the range α. This means that the axis of the anilox roller 211 is arranged on a straight line passing through the 100 axis. The anilox roller 211 is provided so as to be rotatable with respect to the apparatus frame constituting the casing 51 of the coating unit 5 by a rotation mechanism (not shown) around its own axis. Further, the anilox roller 211 is detachably attached to the apparatus frame of the casing 51 of the coating unit 5.

  The chamber 212 supplies the coating liquid to the cells of the anilox roller 211. The chamber 212 has a supply unit 212 a connected to a coating liquid tank (not shown) and a length equivalent to the anilox roller 211, and the circumference of the anilox roller 211 extends from the horizontal direction perpendicular to the axis of the anilox roller 211. A doctor blade 212b that contacts the surface and scrapes off excess liquid of the coating liquid pumped by the supply means 212a. The chamber 212 is provided so that the doctor blade 212 b can move between a contact position where the doctor blade 212 b comes into contact with the peripheral surface of the anilox roller 211 and a separation position where the doctor blade 212 b is separated from the peripheral surface of the anilox roller 211. The movement of the chamber 212 is driven by a drive mechanism (not shown) such as an actuator. Such a chamber 212 is arranged on the upstream side of the anilox roller 211 in the conveyance direction R of the sheet S.

  In such a chamber coater unit 21, the varnish plate cylinder 100 is rotated in the clockwise direction in FIG. 2, and the impression cylinder 12 is further rotated in the counterclockwise direction. It acts when the sheet S passes between them. At this time, the anilox roller 211 is rotationally driven counterclockwise, and the coating liquid is quantitatively supplied to the cell of the anilox roller 211 through the chamber 212. Then, the supplied coating solution is transferred onto the coating plate of the varnish plate cylinder 100 by the anilox roller 211. The coating liquid transferred to the coating plate of the varnish plate cylinder 100 is applied to the sheet S that passes between the varnish plate cylinder 100 and the impression cylinder 12.

  In the chamber coater unit 21, when changing the film thickness of the coating liquid applied to the sheet S, the chamber is changed to the anilox roller 211 having a cell for receiving an amount of the coating liquid corresponding to the film thickness. Thereby, the supply amount of the coating liquid to the varnish plate cylinder 100 is adjusted, and the film thickness of the coating liquid applied to the sheet S can be changed.

  The roll coater unit 22 forms a roll coater type coating liquid supply mechanism, and includes a form roller 221, a feed roller 222, and a storage unit 223.

  The form roller 221 has a cylindrical shape having a length equivalent to that of the varnish plate cylinder 100. The wearing roller 221 is arranged at the same position where the anilox roller 211 is arranged instead of the anilox roller 211. Similarly to the anilox roller 211, the form roller 221 is provided so as to be rotatable by a rotation mechanism (not shown) around its own axis with respect to the apparatus frame constituting the casing 51 of the coating unit 5. Yes. Furthermore, the form roller 221 is detachably attached to the device frame of the casing 51 of the coating unit 5.

  The feed roller 222 supplies the coating liquid to the peripheral surface of the form roller 221. The feed roller 222 has a length equivalent to that of the wearing roller 221, and is arranged so that its own axis is parallel to the axis of the wearing roller 221 and its peripheral surface is in contact with the peripheral surface of the wearing roller 221. Yes. Further, the feed roller 222 is provided with its axis positioned at a position below the axis of the wearing roller 221. The feed roller 222 is rotatably provided by a rotation mechanism (not shown) around its own axis.

  The storage unit 223 stores the coating liquid supplied by the feed roller 222. The storage unit 223 forms a case that opens upward, and stores the coating liquid therein. In addition, the storage unit 223 includes a supply unit 223a that sends the coating liquid in a coating liquid tank (not shown) to the case, and a recovery unit 223b that returns the coating liquid that exceeds the specified amount of the case to the coating liquid tank. Yes. A part of the peripheral surface of the feed roller 222 is immersed in the coating liquid stored in the case of the storage unit 223.

  In addition, the storage section 223 and the feed roller 222 are provided so that the feed roller 222 can be moved to both a contact position where the feed roller 222 comes into contact with the peripheral surface of the form roller 221 and a separation position where the feed roller 221 is separated from the peripheral surface of the form roller 221. . The movement of the feed roller 222 and the storage unit 223 is driven by a drive mechanism (not shown) such as an actuator. The feeding roller 222 and the storage unit 223 are arranged on the downstream side of the sheet-forming roller 221 in the sheet feeding direction R.

  In such a roll coater unit 22, the varnish plate cylinder 100 is rotated in the clockwise direction in FIG. 2, and the impression cylinder 12 is further rotated in the counterclockwise direction. It acts when the sheet S passes between them. At this time, the application roller 221 is rotationally driven in the counterclockwise direction and the feed roller 222 is rotated in the clockwise direction, so that the application liquid stored in the storage unit 223 is applied to the application roller 221 via the feed roller 222. To supply. Then, the supplied application liquid is transferred onto the application plate of the varnish plate cylinder 100 by the roller 221. The coating liquid transferred to the coating plate of the varnish plate cylinder 100 is applied to the sheet S that passes between the varnish plate cylinder 100 and the impression cylinder 12.

  In the roll coater unit 22, when changing the film thickness of the coating liquid applied to the sheet S, the feed roller 222 is moved with respect to the form roller 221, and the nip where the feed roller 222 and the form roller 221 contact each other is moved. Adjust pressure. Thereby, the supply amount of the coating liquid to the varnish plate cylinder 100 is adjusted, and the film thickness of the coating liquid applied to the sheet S can be changed.

  By the way, the roll coater unit 22 further includes a leveling roller 224 and an adjustment member 225.

  The leveling roller 224 is for contacting the peripheral surface of the feed roller 222 and leveling the film thickness of the coating liquid supplied to the peripheral surface of the feed roller 222. The leveling roller 224 has a length equivalent to that of the feed roller 222 and is rotatably provided with its own shaft center arranged in parallel with the shaft center of the feed roller 222. Further, the leveling roller 224 moves from the position where the feed roller 222 is immersed in the coating liquid in the reservoir 223 until the feed roller 222 rotates in the clockwise direction in FIG. In between, it arrange | positions so that a surrounding surface may contact the surrounding surface of the feed roller 222. As described above, by providing the leveling roller 224, the film thickness of the coating liquid on the peripheral surface of the feed roller 222 is leveled, and the coating liquid supplied to the varnish plate cylinder 100 via the form roller 221 is quantified. Is done. For this reason, the film pressure of the coating liquid applied to the sheet S is made uniform, and the occurrence of unevenness is suppressed.

  The leveling roller 224 is configured to rotate in the direction opposite to the feed roller 222 according to the rotation of the feed roller 222. In addition, the leveling roller 224 may be configured to rotate in the same direction as the feed roller 222 by a rotation mechanism (not shown). As described above, when the leveling roller 224 is rotated in the same direction as the feed roller 222, the coating liquid on the peripheral surface of the feed roller 222 acts so as to be scraped off. The effect can be further improved.

  Further, it is preferable that the circumferential speed of the leveling roller 224 is higher than the circumferential speed of the feed roller 222. By doing in this way, since it acts so that the coating liquid of the surrounding surface of the feeding roller 222 may be scraped off more, the leveling effect of the coating liquid of the surrounding surface of the feeding roller 222 can be improved more.

  The adjusting member 225 is for adjusting the film thickness of the coating liquid supplied to the peripheral surface of the form roller 221 in contact with the peripheral surface of the form roller 221. The adjusting member 225 is formed in a plate shape having a length equivalent to that of the form roller 221. Further, the adjustment member 225 itself is in a period from when the contact roller 221 contacts the feed roller 222 until it contacts the varnish plate cylinder 100 when the contact roller 221 rotates counterclockwise in FIG. Are arranged so as to contact the peripheral surface of the attaching roller 221. Thus, by providing the adjustment member 225, the film thickness of the coating liquid on the peripheral surface of the form roller 221 is scraped and adjusted, and the coating liquid supplied to the varnish plate cylinder 100 is quantified. For this reason, the film pressure of the coating liquid applied to the sheet S is made uniform, and the occurrence of unevenness is suppressed. In addition, the coating liquid scraped off by the adjustment member 225 is sent to the storage part 223 through a conduit (not shown). Further, when the leveling roller 224 is configured to rotate in the same direction as the feed roller 222, the coating liquid scraped by the adjustment member 225 may be sent to the leveling roller 224 via a conduit (not shown). Good. The adjustment member 225 is moved so as to avoid a collision with the forming roller 221 by driving a driving mechanism (not shown) such as an actuator when the forming roller 221 is moved by an exchange mechanism 23 described later.

  The leveling roller 224 and the adjusting member 225 may be provided either on the roll coater unit 22 or on either side, and can be appropriately selected according to the viscosity of the coating solution.

  The exchange mechanism 23 is for exchanging the anilox roller 211 of the chamber coater unit 21 and the attaching roller 221 of the roll coater unit 22. As described above, the anilox roller 211 and the wearing roller 221 are detachably attached to the apparatus frame of the casing 51 of the coating unit 5. The exchange mechanism 23 includes a chain 231 that supports the anilox roller 211 and the form roller 221 and moves the anilox roller 211 and the form roller 221. As shown in FIG. 3, the chain 231 is provided on the shaft portion of each of the rollers 211 and 221 inside the casing 51 of the coating portion 5. Further, the chain 231 is provided on the plurality of sprockets 232 inside the casing 51 of the coating unit 5. A drive mechanism 233 is connected to at least one of the sprockets 232 so that the sprocket 232 is driven to rotate. When the sprocket 232 is driven to rotate, the chain 231 circulates, whereby the rollers 211 and 221 are moved downward in the housing 51 and come into contact with the peripheral surface of the coating plate of the varnish plate cylinder 100. It is arranged at the position. On the other hand, when the sprocket 232 is driven to rotate in the reverse direction, the chain 231 circulates, whereby the rollers 211 and 221 are moved upward in the housing 51 and detached from the apparatus frame. When exchanging the anilox roller 211 or the dosing roller 221 by the exchanging mechanism 23, the chamber 212 and the feed roller 222 are moved to the separated positions so as not to collide with the anilox roller 211 or the dosing roller 221. Further, the chamber 212 is moved to the separation position even when the chamber coater unit 21 is not used. On the other hand, even when the roll coater unit 22 is not used, the feed roller 222 is moved to the separation position.

  When the chamber coater unit 21 is used, the anilox roller 211 is disposed by the replacement mechanism 23 at the above-described position in contact with the peripheral surface of the coating plate of the varnish plate cylinder 100. At this time, the form roller 221 is placed and stored on the shelf 511 inside the casing 51 shown in FIG. On the other hand, when the roll coater unit 22 is used, the replacement roller 23 is disposed at the above-described position in contact with the peripheral surface of the coating plate of the varnish plate cylinder 100. At this time, the anilox roller 211 is placed and stored on the shelf 511 inside the casing 51 shown in FIG. Further, another anilox roller 211 for replacement is placed on the shelf 511 inside the casing 51 so as to cope with the change in the film thickness of the coating liquid applied to the sheet S. Thus, the exchange mechanism 23 has a shelf (accommodating part) 511 that accommodates a plurality of replacement anilox rollers. For this reason, the anilox roller 211 can be easily replaced.

  The coating unit (coating apparatus) 5 configured as described above includes the chamber coater unit 21 and the roll coater unit 22, and replaces the anilox roller 211 of the chamber coater unit 21 and the wearing roller 221 of the roll coater unit 22. An exchange mechanism 23 is provided. For this reason, the chamber coater unit 21 and the roll coater unit 22 can be selectively used. As a result, a wide variety of printed materials can be coated flexibly, and a wide range of coating operations can be performed.

  If the chamber coater unit 21 and the roll coater unit 22 are unitized and provided so as to be detachable from the housing 51, the roll coater unit 22 can be removed when only the chamber coater unit 21 is required. . On the other hand, when only the roll coater unit 22 is required, the chamber coater unit 21 can be removed. Further, when both units 21 and 22 are required, both units 21 and 22 can be attached. As a result, the coating part (coating apparatus) 5 according to a user's request is obtained.

  Further, the coating unit (coating apparatus) 5 arranges the chamber 212 of the chamber coater unit 21 on the upstream side in the conveyance direction R of the sheet S with respect to the position where the anilox roller 211 or the form roller 221 is disposed, and the sheet S The storage unit 223 and the feed roller 222 of the roll coater unit 22 are disposed on the downstream side in the transport direction R. Here, the chamber coater unit 21 is limited in the lower region near the varnish plate cylinder 100 due to structural limitations of the chamber 212. On the other hand, the roll coater unit 22 can secure an empty space in a lower region near the varnish plate cylinder 100 as compared with the chamber coater unit 21. Further, it is difficult to secure a working space upstream of the coating unit 5 in the transport direction R of the sheet S by the printing unit 3 and the drying unit 4 having a relatively high height. On the other hand, on the downstream side of the coating unit 5 in the conveyance direction R of the sheet S, a relatively low drying unit 61 that conveys the sheet S from the impression cylinder 12 by the chain gripper 16 is disposed. It is easy to secure a work space near the varnish plate cylinder 100 located above. For this reason, since the roll coater unit 22 is arranged on the downstream side in the conveying direction R of the sheet S, an empty space can be secured in a lower region near the varnish plate cylinder 100, so that a coating plate is attached to the varnish plate cylinder 100. The plate replacement work to be removed and maintenance work such as inspection can be easily performed.

  The coating unit (coating apparatus) 5 includes an anilox roller 211 and a forming roller 221 that are above the varnish plate cylinder 100 and parallel to the axis of the varnish plate cylinder 100, and substantially perpendicular to the axis of the varnish plate cylinder 100. An axis is disposed on P. For this reason, the chamber 212, the storage unit 223, and the feed roller 222 can be arranged on the upstream side and the downstream side in the conveyance direction R of the sheet S on which the anilox roller 211 and the form roller 221 are arranged. Both the chamber coater unit 21 and the roll coater unit 22 can be provided without enlarging the outer shape (housing 51) more than necessary.

  Further, the replacement mechanism 23 is configured to remove the anilox roller 211 and the setting roller 221 from the apparatus frame by moving them upward. The feed roller 222 of the roll coater unit 22 is positioned below the axis of the setting roller 221. Is provided with an axial center. Therefore, when the anilox roller 211 and the dosing roller 221 are attached to and detached from the apparatus frame, the amount of movement for moving the feed roller 222 to the separation position so as not to collide with the rollers 211 and 221 can be reduced as much as possible. The device 5 can be downsized. In addition, the feed roller 222 can be disposed without protruding from above the opening of the storage portion 223, and the storage portion 223 can be disposed without contacting the wearing roller 221.

  Hereinafter, another configuration of the roll coater unit 22 will be described. 4 and 5 are schematic side views of another configuration of the roll coater unit, and FIG. 6 is a schematic plan view of the roll coater unit in FIG. The roll coater unit 22 shown in FIGS. 4 and 5 differs from the above-described configuration of the roll coater unit 22 in the arrangement of the storage unit 223 and the feed roller 222.

  The roll coater unit 22 shown in FIG. 4 is arranged at a position where the axis of the feed roller 222 is higher than the axis of the form roller 221.

  Further, the roll coater unit 22 shown in FIGS. 5 and 6 is arranged at a position where the axis of the feed roller 222 is higher than the axis of the form roller 221. At a position below the feed roller 222, a doctor roller 226 parallel to the axis of the feed roller 222 is arranged at a position below the axis of the feed roller 222, and the peripheral surface of the doctor roller 226 is fed to the feed roller 222. It is provided in contact with the peripheral surface of 222. The doctor roller 226 is rotated in the same direction as the feed roller 222 and adjusts the film thickness of the coating liquid sent out by the feed roller 222. In addition, the storage portion 223 forms both side walls thereof, contacts along a part of the peripheral surface of the feed roller 222 and the doctor roller 226, and a beak shape that seals a contact portion between the feed roller 222 and the doctor roller 226. The restriction plate 227 is provided. In addition, the restriction plate 227 has a beak-shaped front end portion 227a that seals the contact portion between the feed roller 222 and the form roller 221 and is thinner than the rear end portion 227b. It is biased by a biasing means 227c such as a leaf spring or a coil spring so as to contact the peripheral surface.

  Thus, if the axis of the feed roller 222 is located higher than the axis of the form roller 221, the area below the reservoir 223 can be obtained as a wide empty space. On the other hand, plate replacement work for attaching and detaching the coated plate and maintenance work such as inspection can be performed more easily.

  Moreover, while having the both side walls of the storage part 223, it had the control board 227 which seals the contact part of the feed roller 222 and the doctor roller 226. For this reason, the feed roller 222 is arranged at a position higher than the axis of the dosing roller 221 at a position higher than the axis of the dosing roller 221 and then protrudes from the upper portion of the opening of the reservoir 223 to the dosing roller 221 side as shown in FIG. To prevent leakage of the coating liquid from the feed roller 222. Moreover, the storage portion 223 can be disposed without contacting the wearing roller 221.

  Further, the restriction plate 227 has a front end portion 227a that is in contact with the peripheral surfaces of the feed roller 222 and the form roller 221 formed thinner than the rear end portion 227b. For this reason, since the tip end portion 227a is easily worn against the contact with the feed roller 222 and the form roller 221, the feed roller 222 and the form roller 221 can be protected. Moreover, since the rear end portion 227b is thick, strength can be ensured. Furthermore, the tip 227a is urged by the urging means 227c so as to come into contact with the peripheral surfaces of the feed roller 222 and the forming roller 221, thereby preventing the coating liquid from leaking from the contact portion between the feed roller 222 and the doctor roller 226. It can be surely sealed.

  As described above, the coating apparatus and the printing press according to the present invention can perform a wide range of coating operations and are suitable for flexibly dealing with a wide variety of printed materials.

1 is a schematic view of a printing press according to an embodiment of the present invention. It is a side view schematic diagram of a coating device. It is a front view schematic diagram of the exchange mechanism of the coating apparatus shown in FIG. It is a side view schematic diagram of other composition of a roll coater unit. It is a side view schematic diagram of other composition of a roll coater unit. FIG. 6 is a schematic plan view of the roll coater unit in FIG. 5.

Explanation of symbols

1 sheet-fed printing machine (printing machine)
2 Feeding unit 3 Printing unit 4 Drying unit 5 Coating unit (coating device)
100 Varnish plate cylinder 51 Case 511 Shelf (accommodating part)
61 Drying Unit 62 Paper Discharging Unit 9 Printing Unit 10 Plate Cylinder 11 Blanket Cylinder 12 Pressure Cylinder 13 Intermediate Cylinder 15 Transport Cylinder 20 Coating Liquid Supply Mechanism 21 Chamber Coater Unit 211 Anilox Roller 212 Chamber 212a Supply Means 212b Doctor Blade 22 Roll Coater Unit 221 Forming roller 222 Feed roller 223 Storage unit 223a Supply unit 223b Collection unit 224 Leveling roller 225 Adjustment member 226 Doctor roller 227 Restriction plate 227a Front end portion 227b Rear end portion 227c Energizing means 23 Exchange mechanism 231 Chain 232 Sprocket 233 Drive mechanism P Vertical Line R Conveyance direction S Sheet

Claims (12)

A chamber coater unit having a chamber for supplying the coating liquid, and an anilox roller for transferring the coating liquid supplied from the chamber to the peripheral surface of the varnish plate cylinder;
A roll coater having a storage section for storing the coating liquid, a feed roller for feeding the coating liquid from the storage section, and a form roller for transferring the coating liquid supplied from the feed roller to the peripheral surface of the varnish plate cylinder Unit,
An impression cylinder for conveying the sheet and applying the coating liquid transferred to the varnish plate cylinder to the sheet;
A coating apparatus comprising: an anilox roller and a form roller that are detachably supported with respect to an apparatus frame, and an exchange mechanism that exchanges the anilox roller and the form roller.   The chamber of the chamber coater unit is disposed upstream of the sheet conveying direction with respect to the position where the anilox roller or the form roller is disposed, and the roll coater unit is stored downstream of the sheet conveying direction. The coating apparatus according to claim 1, wherein a portion and a feed roller are arranged.   The anilox roller and the form roller are disposed above the horizontally disposed varnish plate cylinder, parallel to the axis of the varnish plate cylinder and on a substantially vertical line of the axis of the varnish plate cylinder. The coating apparatus according to claim 1, wherein the coating apparatus is a coating apparatus.   The coating apparatus according to any one of claims 1 to 3, wherein the replacement mechanism includes a storage unit that stores a plurality of replacement anilox rollers. In the roll coater unit,
The coating according to any one of claims 1 to 4, further comprising a leveling roller that contacts a peripheral surface of the feed roller and smoothes a film thickness of the coating liquid supplied to the feed roller. apparatus. In the roll coater unit,
The coating apparatus according to claim 1, further comprising an adjustment member that adjusts a film thickness of the coating liquid supplied to the surface of the application roller in contact with the peripheral surface of the application roller. . In the roll coater unit,
The coating apparatus according to claim 5 or 6, wherein the feed roller and the leveling roller are rotated in the same direction. In the roll coater unit,
The coating apparatus according to claim 5, wherein a circumferential speed of the leveling roller is made faster than a circumferential speed of the feed roller.   The replacement mechanism is configured to remove the anilox roller and the form roller from the apparatus frame by moving the roll up and the feed roller of the roll coater unit at a position below the axis of the form roller. The coating apparatus according to claim 1, wherein the coating apparatus is provided with an axial center positioned. In the roll coater unit,
Adjust the film thickness of the coating liquid that the feed roller sends out by rotating in the same direction as the feed roller while contacting the peripheral surface of the feed roller by placing the shaft center below the shaft center of the feed roller Doctor roller to do,
A regulating plate is provided which forms both side walls of the storage portion and is arranged in such a manner that a contact portion between the feeding roller and the doctor roller is sealed in contact with a peripheral surface of the feeding roller and the doctor roller. The coating apparatus as described in any one of Claims 1-4 characterized by the above-mentioned.   The restricting plate is attached in such a manner that a portion that seals a contact portion between the feed roller and the doctor roller is formed thinner than other portions, and is in contact with the peripheral surfaces of the feed roller and the doctor roller. The coating apparatus according to claim 10, wherein the coating apparatus is biased by a biasing means. A sheet feeding unit that supplies a sheet, a printing unit that supplies ink to a printing plate wound around a plate cylinder and prints the sheet supplied from the sheet feeding unit, and printing is performed by the printing unit. In a printing machine provided with a paper discharge unit for discharging the sheet,
The coating apparatus according to any one of claims 1 to 11 is arranged in a mode in which a coating liquid is applied to the sheet conveyed between the printing unit and the paper discharge unit, and the sheet is applied to the sheet. A printing machine, wherein a drying unit for drying the applied coating liquid is disposed between the coating apparatus and the paper discharge unit.

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