JP2009262388A - Contact roller in surface treatment device of printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface treatment device of a printing machine capable of efficiently performing a reliable operation in removing work and reuse of a transfer film without generating sagging when the transfer film is wound on a roll. <P>SOLUTION: Contact rollers 103 are respectively provided in the neighborhoods of a feeding roll 23 and a winding-up roll 26 around which the transfer film 5 of the surface treatment device 6 is wound. The contact rollers 103 are controlled so as to be brought into contact with a position for pressing the transfer film 5 by an arm 102 rotating by driving of an air cylinder 101 and to separate from a position separating from the transfer film 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a surface treatment apparatus for a printing press for increasing the added value of a printing surface by transferring a gold foil, an embossed pattern, a hologram pattern, or the like by pressing a transfer film against printed printing paper.

There has been proposed a surface treatment apparatus for a printing press that adds value to the printing paper printed as described above. This is a varnish application part that applies UV curable resin varnish to printing paper printed by a printing unit, and a surface for transferring a transfer film by pressing the transfer film onto the varnish applied printing paper in this varnish application part A processing section, and the surface processing section presses the transfer film against the printing paper with a cylinder that conveys the printing paper, a pair of pressing rollers that press the transfer film against the printing paper on the cylinder, and the pressing roller. And an ultraviolet irradiation unit that cures the varnish when the transfer film is unwound, and the transfer film is unwound from the unwinding roll and wound around the winding roll (see, for example, Patent Document 1).
JP 2008-23945 A

  By the way, in this type of printing machine, the transfer film fed out from the feed roll is wound around the take-up roll via the pressing roller, but is not properly wound so that there is no slack in winding. There is a problem that the removal work from the roll after use becomes complicated. In addition, depending on the transfer film, the film drive may be reversely rotated and the transfer film wound around the take-up roll may be rewound onto the feed roll and reused. However, sagging occurs when the roll is wound around each roll. There is a problem that air is mixed between the films wound on the roll and troubles occur when the film is fed.

  In view of the above-mentioned problems, the present invention provides a touch roller that abuts a transfer film wound around a roll of a surface treatment apparatus and presses the transfer film, so that slack is produced when the transfer film is wound around the roll. It is an object of the present invention to provide a surface treatment apparatus for a printing press that does not occur and can efficiently and reliably perform a transfer film removal operation and reuse.

  In order to solve the above problems, the present invention is used in a printing machine having a printing unit 3 that prints a sheet 2 conveyed from a sheet feeding unit 1 and a cylinder 19 that conveys the sheet 2. The first roll 23 around which one end of the transfer film 5 pressing the paper 2 is wound, the second roll 26 around which the other end of the transfer film 5 is wound, and the transfer film 5 are driven. A surface treatment apparatus 6 for a printing press having transfer film driving units M1, M2 and a control unit 96 for controlling the transfer film driving units M1, M2, wound around the roll on the winding side A touch roller 103 that presses the transfer film 5 is provided so as to be able to contact and separate from the transfer film 5.

  According to the surface treatment apparatus for a printing press according to claim 1 of the present invention, the touch roller that presses the transfer film wound around the roll of the surface treatment apparatus is provided so as to be able to contact and separate. When winding, there is no slack due to the pressure of the touch roller, no air is mixed in between the films, the transfer film can be removed easily, and the transfer film can be reused. Even when the transfer film is unwound or re-supplied, it is possible to realize a surface treatment apparatus for a printing press that can perform a smooth operation.

  A printing press according to an embodiment of the present invention will be described with reference to FIGS. As shown in the schematic overall view of FIG. 1, the printing press according to the present embodiment is a sheet-fed offset printing press, which gives a gloss by applying a resin varnish to the printing surface, and further from there, a gold foil, an embossed pattern, a hologram pattern, etc. Is provided with a surface treatment device 6 capable of processing the printing surface by transferring the ink. The printing machine includes a sheet feeding unit 1 for feeding sheets 2 as printing sheets one by one from a sheet stacking unit by a feeder device, a sheet separating device, and the like, and a sheet 2 from the sheet feeding unit 1 A printing unit 3 for performing printing, a varnish application unit 4 for applying (coating) an ultraviolet curable resin varnish (also referred to as a varnish) to the sheet 2 printed by the printing unit 3, and the varnish application unit A surface treatment device 6 for pressing the transfer film 5 on the ultraviolet curable resin varnish of the sheet 2 coated with the ultraviolet curable resin varnish 4 to perform the surface processing of the sheet 2, and the surface A paper discharge unit 7 is provided for discharging the sheet 2 whose surface is processed by the processing device 6. Here, the printing unit 3 includes five printing units 8, 9, 10, 11, and 12 so that printing of five colors can be performed, but printing of colors other than five colors, that is, one color or two or more colors. It may be a printing unit capable of Further, although the paper discharge unit 7 is constituted by a chain conveying device provided with a gripper, it may be a printing machine without the paper discharge unit 7, or the specific parts of the parts constituting the printing machine. The configuration is not limited to that shown in the figure. Further, although a sheet is used as the printing paper, a continuous long paper may be used. The transfer film 5 is formed of a transparent film with an embossed pattern, a hologram pattern or the like as irregularities. The transfer film 5 is a type in which the irregularities are transferred onto the sheet 2 coated with varnish, and a transfer layer such as a gold foil is applied. There is a type in which the transparent layer is transferred onto the sheet 2 by pressing the transparent film against the sheet 2 coated with varnish.

  The printing units 8 to 12 include printing impression cylinders 8A to 12A and transfer cylinders 8B to 12B. Although not shown, each of the cylinders 8A to 12A, 8B to 12B has two grippers (one place) for gripping the fed sheet 2 with the nail base and the claws. Or three or more locations). The varnish application unit 4 includes a varnish cylinder 4A to which an ultraviolet curable resin varnish is supplied and an impression cylinder 4B for applying the ultraviolet curable resin varnish to the sheet 2 printed so as to be opposed to the varnish cylinder 4A. And a transfer cylinder 14 for delivering the sheet 2 to these cylinders 4A and 4B. The cylinders 14 and 4B are also provided with grippers for gripping the sheet 2 fed out in the same manner as described above with the nail base and the claws at two locations (one or three or more locations) in the circumferential direction.

  As shown in FIGS. 1 and 2, the surface treatment device 6, like the varnish application unit 4, has grippers for gripping the sheet 2 from the impression cylinder 4 </ b> B at two locations in the circumferential direction (one or three). An upstream transfer cylinder 18 provided at the position of the transfer cylinder 18, and a downstream impression cylinder (which may be simply referred to as a cylinder) 19 that receives the sheet 2 from the transfer cylinder 18. A film pressing part F that presses the transfer film 5 against the sheet 2 on the cylinder 19 and an ultraviolet irradiation part that cures the UV curable resin varnish of the sheet 2 on which the transfer film 5 is pressed by the film pressing part F 20. Therefore, an embossed pattern, a hologram pattern, or the like is formed on the ultraviolet curable resin varnish by pressing the transfer film 5 against the sheet 2 on the impression cylinder 19 while feeding the transfer film 5 in the same direction as the impression cylinder 19 on the downstream side. At the same time, the transfer film 5 is attached to the sheet 2 by using the varnish as an adhesive, and the ultraviolet curable resin varnish is cured by transmitting ultraviolet light through the attached transfer film 5, thereby the sheet. The paper 2 can be integrated. Then, when the transfer film 5 and the sheet 2 that have been moved to the end in the transport direction after being integrated move to the side where they are separated from each other, both of them are peeled off, and the transfer film 5 is taken up by a take-up roll 26 described later. The sheet 2 integrated with the cured UV curable resin varnish is delivered to the paper discharge unit 7. By pressing the transfer film 5 against the ultraviolet curable resin varnish of the sheet 2, there is an advantage that the coated surface of the ultraviolet curable resin varnish can be smoothed and the glossiness can be increased. The ultraviolet light sandwiched between the transfer film 5 and the sheet 2 from the ultraviolet irradiation unit 20 disposed above the transfer film 5 pressed against the sheet 2 on the impression cylinder 19 as described above. In order to be able to irradiate the curable resin varnish with ultraviolet rays, the transfer film 5 uses a material that allows ultraviolet rays to pass through, for example, a transparent synthetic resin film. Reference numeral 71 denotes a hoist for installing the transfer film 5 wound in a roll shape at a predetermined position (the hoist 71 is omitted in FIG. 2).

  As shown in FIG. 2, the ultraviolet irradiation unit 20 includes cases 21 and 22 in which two (one or three or more) ultraviolet lamps are incorporated. Further, as shown in FIG. 2, the film pressing portion F is configured to be movable so as to be separated from or approaching the impression cylinder 19, and the ultraviolet irradiation unit 20 is also separated or approached from the impression cylinder 19. In the position where the film pressing part F approaches the impression cylinder 19 (position indicated by a solid line in the figure), the ultraviolet irradiation unit 20 approaches the impression cylinder 19 (solid line in the figure). In the position where the film pressing part F is separated from the impression cylinder 19 (position indicated by the two-dot chain line in the figure), the ultraviolet irradiation part 20 is separated from the impression cylinder 19 (not shown). It is comprised so that.

  The surface treatment device 6 will be described in detail. As shown in FIG. 1 and FIG. 2, the transfer film 5 is wound and sent out, and the transfer film 5 sent out from the supply roll 23 is transferred as described above. Two (or one or more) pressing rollers 24, 25 pressed against the printing paper 2 on the impression cylinder 19, and the transfer film 5 is pressed by the pressing rollers 24, 25 and then peeled off from the printing paper A winding roll 26 for winding the transfer film 5, and the film pressing portion F is connected to the pressure drum 19 by the pressing rollers 24, 25 and the pressing rollers 24, 25 of the transfer film 5. It is composed of a portion 5A pressed against the upper sheet 2. R1 to R10 shown in FIG. 2 are film guiding rollers disposed between the supply roll 23 and the pressing roller 24 located on the upstream side in the transport direction. R11 to R14 are film guiding rollers disposed between the pressing roller 25 and the winding roll 26 located on the downstream side in the transport direction.

  One driving means for separating or approaching the film pressing part F or the ultraviolet irradiation part 20 with respect to the impression cylinder 19 is provided, and the film pressing part F and the ultraviolet irradiation part 20 are integrated by the driving means. It is equipped with an interlocking mechanism that interlocks the two to move the camera. Specifically, the pressing rollers 24 and 25 constituting the film pressing portion F, the transfer film 5 hanging between the pressing rollers 24 and 25, and two ultraviolet lamps (not shown) constituting the ultraviolet irradiation portion 20 are illustrated. A plate-like support member 27 that supports the cases 21 and 22 provided in the interior and is movable so as to be separated from or close to the impression cylinder 19 and whose horizontal direction is the thickness direction; A pair of guide members (not shown) for guiding the support member 27 is provided, and the driving means is provided with an air cylinder (not shown) as an actuator for moving the support member 27.

  A tooth portion that meshes with a gear 30 that is rotatably fixed to a casing of the surface treatment device 6 is formed on the telescopic rod of the air cylinder, and the rotational force of the gear 30 that is rotated by the expansion and contraction of the telescopic rod is used as a vertical movement force. The lower end of the rack 31 provided with the tooth portion 31a to be converted is connected to the upper end of the support member 27 at the substantially central portion in the sheet transport direction. Therefore, when the surface treatment is not performed, by extending the telescopic rod of the air cylinder, the gear 30 rotates counterclockwise to move the rack 31 to the upper position, and the support member 27 moves to the upper position. To make it happen. As a result, the film pressing part F (the pressing rollers 24 and 25 and the transfer film 5 </ b> A hanging between the pressing rollers 24 and 25) and the ultraviolet irradiation part 20 (two ultraviolet lamps) are separated from the impression cylinder 19. (Only the film pressing portion F is shown by a two-dot chain line in FIG. 2). In order to perform the surface treatment from this state, the telescopic rod of the air cylinder is shortened, whereby the film pressing portion F (the transfer film hung between the pressing rollers 24 and 25 and the pressing rollers 24 and 25). 5A) and the ultraviolet irradiation unit 20 (two ultraviolet lamps) can be brought close to the impression cylinder 19 (see the solid line in FIG. 2).

  Next, components for driving the touch roller according to the present invention will be described with reference to FIGS. FIG. 3 is a view of the touch roller component viewed from the direction A in FIG. 2 and is a partially developed view. An air cylinder 101 is mounted in the surface treatment apparatus 6 by fixing a clamp piece 101b that can rotate to the subframes 6a and 6b. Therefore, the air cylinder 101 can swing with respect to the sub frames 6a and 6b. Here, the subframe 6a in FIG. 3 is on the operator side (front side in FIG. 2), and the subframe 6b is on the counter operator side (backward direction in FIG. 2). An arm 102 is rotatably supported on a rod 101a of the air cylinder 101. The base of the arm 102 is rotatably attached to shafts 6a1 and 6b1 provided on the subframes 6a and 6b. The tip of the arm 102 supports both ends of the touch roller 103 so as to be rotatable. The air cylinder 101 and the arm 102 are provided in each of the left and right directions in FIG. 2 and FIG. Two touch rollers 103 are provided, one in the horizontal direction in FIG. The surface of the touch roller 103 is formed of rubber, resin, or the like, and is configured so as not to damage the surface of the transfer film 5 even if it contacts or presses against the transfer film 5.

  As the rod 101a of the air cylinder 101 expands and contracts, the arm 102 rotates about the shafts 6a1 and 6b1. With this rotation, the touch roller 103 pivotally supported by the arm 102 also moves. The rotation trajectory R is shown on the left touch roller 103 in FIG. The touch roller 103 is configured to contact and press against the transfer film 5 wound on the roll on the winding side. That is, in FIG. 2, when the transfer film 5 is supplied from the supply roll 23 and the transfer film 5 is taken up by the take-up roll 26, the touch roller 103 on the take-up roll 26 side (left side in FIG. 2) As the rod 101a of the air cylinder 101 is shortened so as to press, the arm 102 rotates counterclockwise about the shaft 6a1. At this time, the arm 102 rotates counterclockwise about the shaft 6b1 so that the touch roller 103 on the supply roll 23 side (the right side in FIG. 2) does not contact the transfer film 5. When the rewinding operation is performed so that the transfer film 5 wound around the take-up roll 26 is taken up by the supply roll 23, the touch roller 103 (the right side in FIG. 2) on the supply roll 23 side transfers the reverse. As the rod 101a of the air cylinder 101 is shortened so as to press the film 5, the arm 102 rotates clockwise about the shaft 6b1.

  FIG. 5 is a schematic block diagram showing a controller of the surface treatment apparatus for a printing press according to the embodiment of the present invention. The motor M1 drives the supply roll 23, the motor M2 drives the take-up roll 26, and the operation of the printing press. The printer includes a touch panel 93 serving as a printing unit, a printing machine CPU 94 that controls the printing machine main body, an impression cylinder encoder 95 that outputs signals such as rotation speed and angle, and a control unit 96. The control unit 96 includes a microprocessor 96a (which may be a sequencer) that performs arithmetic processing and the like, a ROM 96b that stores data and a predetermined program (such as an arithmetic expression or a table), a RAM 96c that can store various types of information related to the machine speed, a micro The interface 96d is used to mediate exchange of various signals between the processor 96a and a device provided outside the control unit 96.

Next, the operation of the touch roller of the surface treatment apparatus for a printing press according to the embodiment of the present invention will be described. In addition, about this effect | action, the control part 96 mentioned above will perform these instructions. The touch roller acts only when the operator operates the touch panel 93 to turn on a “touch roller automatic control button” (not shown). When the “touch roller automatic control button” is turned OFF, the touch roller 103 is moved in a direction to be detached from the transfer film 5. An example of turning off the “touch roller automatic control button” is a case where a gold foil film is used as the transfer film 5. When the transfer film 5 having a gold foil transfer layer attached to the surface is used, the gold foil of the transfer film 5 may be peeled off by the touch roller 103. Depending on the ease of peeling of the transfer layer, the operator turns off the “touch roller automatic control button”.
○ When a “continuous operation preparation button” (not shown) on the touch panel 93 is turned on during continuous operation, the air cylinder 101 is driven so that the touch roller 103 on the winding roll 26 abuts against and presses the transfer film 5, and the arm 102 Rotate. At the same time, the air cylinder 101 is driven and the arm 102 is rotated so that the touch roller 103 on the supply roll 23 side is detached from the transfer film 5.
○ At the time of film feeding When the film pressing portion F is detached from the impression cylinder 19 and wants to feed the transfer film 5, the operator turns on a “film feeding preparation button” (not shown) on the touch panel 93. Then, the air cylinder 101 is driven so that the touch roller 103 on the winding roll 26 side contacts and presses against the transfer film 5, and the arm 102 rotates. At the same time, the air cylinder 101 is driven and the arm 102 is rotated so that the touch roller 103 on the supply roll 23 side is detached from the transfer film 5.
○ After continuous operation during film rewinding, when it is desired to rewind and reuse the transfer film 5 wound around the winding roll 26 (also at this time, the film pressing portion F is at a position separated from the impression cylinder 19). The operator turns on a “film rewind preparation button” (not shown) on the touch panel 93. Then, the air cylinder 101 is driven so that the touch roller 103 on the supply roll 23 abuts against and presses the transfer film 5, and the arm 102 rotates. At the same time, the air cylinder 101 is driven and the arm 102 is rotated so that the touch roller 103 on the winding roll 26 side is detached from the transfer film 5.
O During slow motion operation It is preferable that the touch roller 103 does not act in slow motion operation in which fine adjustment of the machine is performed instead of normal operation, because the speed is very low. Therefore, when information on slow operation is input from the printing press CPU 94 and the impression cylinder encoder 95, the control unit 96 controls the touch rollers 103 to be detached from the transfer film 5.

  The pressing force of the touch roller 103 is desirably adjusted according to various conditions. For example, it is desirable to perform adjustment control so that the pressing force of the touch roller 103 increases as the thickness of the transfer film 5 increases, and the pressing force of the touch roller 103 decreases as the thickness of the transfer film 5 decreases. Further, adjustment control is performed so that the pressing force of the touch roller 103 is increased as the transfer film 5 is wound around each roll 23 and 26 and the roll diameter is increased, and the pressing force of the touch roller 103 is decreased as the roll diameter is decreased. It is desirable to do.

  The mechanism of the touch roller in the surface treatment apparatus for a printing press according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the above embodiment, the UV curable resin varnish is coated by the varnish application unit and the varnish is dried by the UV irradiation unit, but the varnish application unit and the UV irradiation unit are omitted, and the printing unit prints the sheet. The ink attached to the leaf paper may be replaced with an adhesive and may be naturally dried. Further, in the above embodiment, the transfer film 5 is pressed against the sheet 2 on the cylinder 19 by the pressing rollers 24 and 25. However, if the transfer film 5 is pressed against the sheet 2, the pressing roller is used. Is not necessary. In the present embodiment, the sheet offset printing machine is used. However, the present invention is not limited to this, and it may be a rotary paper offset printing machine or a flexographic printing machine.

  The surface treatment apparatus for a printing press according to the present invention is extremely useful in a printing press having a surface treatment apparatus.

Schematic side view of a sheet-fed offset printing press provided with a surface treatment apparatus according to the present embodiment Enlarged side view of main parts of surface treatment equipment It is the figure seen from the A direction of FIG. 2 which shows the mechanism which drives a touch roller, and the figure which expand | deployed one part The principal part enlarged view of FIG. 2 which shows the mechanism which drives a touch roller. Schematic block diagram showing the control unit of the surface treatment apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Transfer film 6 Surface treatment apparatus 23 Supply roll 26 Winding roll 93 Touch panel 96 Control part 101 Air cylinder 102 Arm 103 Touch roller R Rotation locus

Claims (1)

  First used in a printing machine having a printing unit that prints paper conveyed from a paper supply unit and a cylinder that conveys the paper, and one end of a transfer film that presses the paper on the cylinder is wound around The surface of a printing press having a second roll on which the other end of the transfer film is wound, a transfer film driving unit that drives the transfer film, and a control unit that controls the transfer film driving unit A surface treatment apparatus for a printing press, characterized in that a touch roller that presses the transfer film wound around the roll on the winding side is provided so as to be able to contact and separate from the transfer film. .

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