JP2011037239A - Method and device for correcting error of printing position - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for correcting errors of the printing position, which prevent minute displacement of a plate and that of a printing target. <P>SOLUTION: Each of alignment stages 23, 28 is respectively provided on a plate table 13 and a printing-target table 14 traveling on a guide rail 10 in an X-axis direction. A plate 11 and a printing target 12 are respectively held on each of top plates 24, 29 including each bar mirror 26, 31 in a Y-axis direction and each bar mirror 27, 32 in the X-axis. While a transfer process and a retransfer process are executed by allowing each of tables 13, 14 to travel immediately below a blanket roll 17, each distance from one place corresponding to each of bar mirrors 26, 27 and 31, 32 in each of the X-axis and Y-axis directions to each bar mirror is measured by laser length-measuring instruments 34, 35 and two capacitance type displacement gauges 36a, 36b. Each position and each angle posture of the plate 11 and the printing target 12 are calculated by a controller 33 on the basis of the measurement result. A correction command of the position and angle for aligning each position and each angle posture with a prescribed target position and a prescribed target angle posture is given to each of alignment stages 23, 28 on each of tables 13, 14 to correct the position of the plate 11 and that of the printing target 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a printing position error correction method and apparatus used for correcting a printing position error when printing is performed by a printing apparatus.

  One of the printing technologies is offset printing. Among these, offset printing using an intaglio is a target to be printed from the blanket roll after ink is once transferred (received) to a blanket roll that rolls from the inked intaglio. It is known as a technique capable of printing the intaglio printing pattern on the surface to be printed with good reproducibility by performing retransfer (printing) of the ink to the surface.

  By the way, in recent years, as a method for forming an electrode pattern (conductive pattern) such as a liquid crystal display on a required substrate, a printing technique using a conductive paste as a printing ink instead of fine processing by etching a metal vapor deposition film, For example, a method of printing and forming an electrode pattern on a substrate using an intaglio offset printing technique has been proposed.

  When the electrode pattern of the liquid crystal display or the like is formed on the substrate, an electrode width as fine as about 10 μm may be required, for example. Furthermore, a plurality of electrode patterns may be formed on the substrate in a superimposed manner. In this case, the electrode pattern is overprinted by replacing the plate, but the electrode pattern may be destroyed if the printing position is shifted. Therefore, the required accuracy differs slightly depending on the object, but in the case of a fine electrode pattern in which the electrode width is about 10 μm, it is necessary to suppress the displacement of the printing position to be superimposed to several μm or less. is there.

  Therefore, when the electrode pattern is formed on the substrate by printing, an extremely high printing accuracy is required as compared with the conventional general offset printing in which characters and images are printed on paper or the like. As described above, as an offset printing apparatus when performing offset printing with high printing accuracy on a printing target, it is advantageous to use a flat printing apparatus of a type using a flat plate similar to the printing target as a printing plate. .

  Therefore, as a printing apparatus for improving the printing accuracy of offset printing, for example, a printing apparatus whose outline is shown in FIG. That is, a printing platen (plate table) 2 that supports a platen plate (not shown) on which a flat plate 1 is placed, and a printing platen on which a glass substrate 3 to be printed (printed material) is placed. Guide blocks (sliders) 5 and 6 are fixedly attached to the lower side of a printing carriage (print target table) 4 that supports (not shown) with the same dimensions and the same arrangement, and the same guide rail (rail). 7, the plate carriage 2 and the printing carriage 4 are attached so as to be able to travel (reciprocate) via the respective guide blocks 5 and 6, and a blanket roll (blanket cylinder) 8 is straddled across the guide rail 7. It is the structure which installed.

  According to the printing apparatus having such a configuration, even if the straightness of the guide rail 7 is lowered directly below the blanket roll 8 and the postures of the plate carriage 2 and the printing carriage 4 are inclined at the position, Since the carts 2 and 4 have the same inclination, the posture error between the plate 1 and the glass substrate 3 supported on the carts 2 and 4 is suppressed, and ink from the plate 1 to the blanket roll 8 is suppressed. Printing accuracy can be improved by performing the steps of transfer (resin transfer, acceptance) and re-transfer (pattern transfer, printing) of ink from the blanket roll 8 to the glass substrate 3 at the same position. (For example, refer to Patent Document 1).

  In addition, as a technique for preventing the occurrence of misalignment of the printing position when performing offset printing, for example, it is possible to align XYθ in three directions on a carriage that runs under a blanket roll (transfer drum). A configuration in which a XYθ table is provided, a substrate to be printed is held on the XYθ table, and a printing plate is placed on the trolley at a position aligned with the XYθ table in the traveling direction of the trolley. In the printing apparatus, the step of transferring (receiving) ink from the printing plate to the blanket roll and the step of retransferring (printing) ink from the blanket roll to the substrate held on the XYθ table are sequentially performed. Printed substrate held on the XYθ table when offset printing processing is performed on the substrate The predetermined position of the printed print pattern by imaging by the CCD camera, detects the positional deviation amount of the print pattern on the basis of the output of the CCD camera. Next, after removing the printed substrate on the XYθ table and attaching a new substrate for the next printing process on the XYθ table, before starting the printing process, the XYθ table. Thus, the position of the new substrate is corrected with a correction amount determined with reference to the amount of misalignment detected with respect to the print pattern of the substrate printed last time. Conventionally, a method for preventing occurrence of positional deviation of a printed pattern to be printed has been proposed (for example, see Patent Document 2).

  Another method is to transfer (receive) ink from the printing plate to the blanket roll in a printing apparatus having the same configuration as described above, and to re-ink the ink from the blanket roll onto the substrate held on the XYθ table. When performing the offset printing process on the substrate by sequentially performing the transfer (printing) process, the ink transferred from the printing plate on the surface of the blanket roll is completed when the transfer (receiving) process is completed. While the position is imaged by the CCD camera, the alignment mark provided in advance on the surface of the substrate on the XYθ table is imaged by another CCD camera, and the XYθ table is driven based on the outputs of both CCD cameras. Then, the position of the substrate is corrected, and then the position-corrected substrate is removed from the blanket roll. In the past, there has also been proposed a method for preventing the occurrence of displacement of a printed pattern printed on a substrate by performing a retransfer process for performing retransfer (printing) of the ink (for example, (See Patent Document 3).

JP 2008-129362 A JP-A-5-55799 JP-A-5-55798

  However, in general, when performing an offset printing process, in a transfer (acceptance) step, a rolling blanket roll is brought into contact with a plate moving underneath by pressing it with a required printing pressure (contact pressure). Similarly, in the retransfer (printing) process, the rolling blanket roll is brought into contact with a printing object such as a substrate moving underneath with a required printing pressure (contact pressure). Therefore, the plate and the printing object are subjected to a load due to the printing pressure from the blanket roll, and the structure holding the printing plate and the printing object is distorted. The actual situation is that a slight misalignment has occurred in the print target.

  However, as in the case where an electrode pattern such as a liquid crystal display is formed by printing on the substrate described above, precise printing is performed in which it is necessary to suppress the positional deviation of the printing position to several μm or less. In this case, even if a slight misalignment occurs in the printing plate or the printing target subjected to the printing pressure load from the blanket roll during the offset printing process, the printing position of the printing plate or printing target is caused by the fine misalignment of the printing plate or printing target. If an error, that is, a reduction in the reproducibility of the print pattern occurs, there is a possibility that the required print accuracy cannot be satisfied.

  In addition, what was shown by the said patent document 1 is not equipped with the mechanism in which the position correction | amendment is carried out after making the plate | board 1 and the glass substrate 3 used for offset printing hold | maintain on the plate carriage 2 and the printing trolley 4 which respectively correspond. Therefore, it is not possible to correct a slight misalignment that occurs in the plate 1 that receives a printing pressure load from the blanket roll 8 or the glass substrate 3 to be printed during the offset printing process.

  In Patent Document 2 and Patent Document 3, the idea of correcting the position of a substrate held on an XYθ table on a carriage by using the XYθ table in a printing apparatus for performing offset printing processing is shown. However, in the correction of the position of the substrate using the XYθ table, according to the technique disclosed in Patent Document 2, after performing the offset printing process for a certain substrate, before starting the offset printing process for the next substrate. In addition, in the method disclosed in Patent Document 3, after performing a transfer (acceptance) step for a certain substrate, it is performed before starting a retransfer (printing) step for the substrate. For this reason, it is not possible to correct the position of a minute misalignment that occurs in the substrate that receives a printing pressure load from the blanket roll during the offset printing process.

  In addition, the ones disclosed in Patent Document 2 and Patent Document 3 do not have a mechanism for correcting the position of the printing plate once placed on the carriage, and therefore receive a printing pressure load from the blanket roll during the offset printing process. It is not possible to correct a minute misalignment that occurs in the printing plate.

  Therefore, the present invention can correct a misalignment even if a slight misalignment occurs in a printing plate or a printing target that receives a printing pressure load from a blanket roll when performing an offset printing process. It is an object of the present invention to provide a printing position error correction method and apparatus capable of preventing the possibility of occurrence and thus performing high-precision printing with high accuracy.

  In order to solve the above-mentioned problems, the present invention provides a plate alignment stage comprising a top plate on a plate table corresponding to claim 1 and provided with a top plate that can be precisely driven in two orthogonal directions and a rotational direction. When the transfer process is performed by moving the blanket roll along the guide rail directly below the blanket roll and bringing the blanket roll into contact with the plate held on the top plate of the plate alignment stage from above with the required printing pressure, The plate alignment stage is detected such that the position and angle orientation of the plate held on the top plate of the plate alignment stage are detected, and the detected position and angle posture of the plate coincide with a predetermined target position and angle posture. This corrects the position and angle of the plate together with the top plate, and allows precise driving in two orthogonal directions and in the rotational direction on the plane. A printing target alignment stage comprising a top plate is provided on the printing target table, travels directly under the blanket roll along the guide rail, and the printing target held on the top plate of the printing target alignment stage is blanket. When the re-transfer process is performed by bringing the roll into contact with the printing pressure from above, the position and angular orientation of the print object held on the top plate of the alignment stage for the print object are detected, and the detected print object The print position error correction method is to correct the position and angle orientation of the print object together with the top plate by the print object alignment stage so that the position and angle orientation of the print object coincide with the predetermined target position and angle orientation.

  Further, in the above-described configuration, the position and the angle orientation of the plate held on the top plate of the plate alignment stage are set to the X axis bar mirror or the Y axis bar mirror provided on the top plate of the plate alignment stage. Positions detected at two positions in the longitudinal direction of the bar mirror and at one of the other bar mirrors, the X-axis bar mirror and Y-axis bar mirror on the top plate of the plate alignment stage, and the plate holding position X is provided on the top plate of the alignment stage for printing object, and the position and angle orientation of the printing object held on the top plate of the alignment stage for printing object are detected on the basis of the relative arrangement information of Length of one of the axis bar mirror and Y axis bar mirror The position detected at two positions in the required direction and one of the other bar mirrors, the position of the X-axis bar mirror and the Y-axis bar mirror on the top plate of the printing object alignment stage, and the holding position of the printing object Detection is performed based on information on relative arrangement.

  Corresponding to claim 3, a plate table that travels along a guide rail disposed below the blanket roll is provided with a top plate that can be precisely driven in two orthogonal directions on the plane and in the rotational direction. The plate alignment stage is provided so that the plate can be held on the top plate of the plate alignment stage, and the top plate is orthogonal to the printing target table that runs along the guide rail. Provided with an alignment stage for a printing object that can be driven in two directions and in a rotational direction so that the printing object can be held on the top plate of the alignment stage for the printing object, and travels directly below the blanket roll. To detect the position and angle of the plate held on the plate table via the plate alignment stage And means for detecting the position and angle orientation of the printing target held via the printing target alignment stage on the printing target table running directly under the blanket roll, and the plate table A position and angle correction command for making the position and angle orientation of the plate detected when traveling directly under the blanket roll coincide with a predetermined target position and angle orientation is sent to the plate alignment stage of the plate table. And a position and angle correction command for matching the position and angle orientation of the print object detected when the print object table travels directly under the blanket roll with a predetermined target position and angle attitude. A controller having a function of giving to the alignment stage for the printing object of the printing object table The print position error correction device having a configuration that.

  Further, in the above configuration, as a means for detecting the position and angle orientation of the plate held on the plate table traveling directly under the blanket roll via the plate alignment stage, an X-axis bar mirror is provided on the top plate of the plate alignment stage. And a Y-axis bar mirror, and the distance between two bar mirrors in the longitudinal direction of one of the bar mirrors provided on the top plate of the plate alignment stage and one of the other bar mirrors. The position and angle orientation of the printing object that is provided with a distance sensor for measuring from the direction orthogonal to the longitudinal direction of each bar mirror and that is held on the printing object table that runs directly under the blanket roll via the alignment stage for printing object As a means for detecting the print object alignment An X-axis bar mirror and a Y-axis bar mirror are provided on the top plate of the stage, and one of the two bar mirrors provided on the top plate of the alignment stage for the printing object and the two required distances in the longitudinal direction of the bar mirror and any one of them A distance sensor for measuring the distance to one place of the other bar mirror from a direction orthogonal to the longitudinal direction of each bar mirror is provided.

  Furthermore, in the above configuration, the X-axis bar mirrors and the Y-axis bar mirrors provided on the top plates of the plate alignment stage and the printing target alignment stage are respectively arranged along the longitudinal direction of the guide rail and the direction orthogonal thereto. In addition, a distance sensor is provided inward along a direction orthogonal to the longitudinal direction of the guide rail at a position on one side of the guide rail near the position immediately below the blanket roll. The distance to the X-axis bar mirror provided on the top plate of the plate alignment stage on the plate table running directly under the blanket roll, and the top plate of the alignment stage for printing on the table to be printed running directly under the blanket roll Can measure the distance to the X-axis bar mirror And to the configured.

According to the present invention, the following excellent effects are exhibited.
(1) A plate alignment stage provided with a top plate that can be precisely driven in two orthogonal directions and a rotational direction on a plane is provided on a plate table and travels directly under a blanket roll along a guide rail. The position and angle of the plate held on the top plate of the plate alignment stage when performing a transfer process by bringing the blanket roll into contact with the plate held on the top plate of the plate alignment stage from above with the required printing pressure. The plate position and angle posture are corrected together with the top plate by the plate alignment stage so that the detected plate position and angle posture coincide with a predetermined target position and angle posture, and further, Alignment for printing objects with a top plate that can be precisely driven in two orthogonal directions on the plane and in the rotational direction A stage is provided on the table to be printed, and it travels directly under the blanket roll along the guide rail. The blanket roll is brought into contact with the printing target held on the top plate of the alignment stage for the printing target from above with a required printing pressure. When the retransfer process is performed, the position and angular orientation of the printing target held on the top plate of the alignment stage for printing target are detected, and the detected position and angular orientation of the printing target are determined to be a predetermined target position and Since there is a printing position error correction method and apparatus for correcting the position and angle orientation of the printing object together with the top plate by the printing object alignment stage so as to coincide with the angle attitude, the plate alignment stage is provided on the plate table. Ink transfer (acceptance) to the blanket roll from the plate held Even if a slight misalignment from a predetermined target position and angle orientation occurs in the plate that receives the printing pressure load from the blanket roll during the transfer process, the plate is caused by the precision drive of the plate alignment stage. Since the misalignment can be corrected immediately, the possibility of misalignment in the printing pattern transferred (received) from the plate to the blanket roll can be prevented. In addition, during the retransfer process in which the ink is retransferred (printed) from the blanket roll to the print target held on the print target table via the print target alignment stage, a printing pressure load is applied from the blanket roll. Even if a slight misalignment from a predetermined target position and angular orientation occurs on the print target, the misalignment generated on the print target can be immediately corrected by the precise driving of the print target alignment stage. It is possible to prevent the occurrence of positional deviation in the print pattern retransferred (printed) from the roll to the printing target.
(2) Therefore, it is possible to improve the reproducibility of the printing pattern by preventing the possibility of an error in the printing position, and to improve the printing accuracy, so that a liquid crystal display or the like is formed on the substrate to be printed. As in the case where the electrode pattern is formed by printing, it is possible to perform high-precision printing that requires the positional deviation of the printing position to be suppressed to several μm or less.
(3) The length and position of the plate held on the top plate of the plate alignment stage is determined by the length of one of the X-axis bar mirror and the Y-axis bar mirror provided on the top plate of the plate alignment stage. Relative position detected at two positions in the required direction and one of the other bar mirrors, and the position of the X-axis bar mirror and Y-axis bar mirror on the top plate of the plate alignment stage and the plate holding position An X-axis bar mirror provided on the top plate of the alignment stage for printing, and the position and angle orientation of the printing object held on the top plate of the alignment stage for printing 2 of the required distance in the longitudinal direction of one of the Y-axis bar mirrors And the relative position of the detected position of one of the other bar mirrors and the location of the X-axis bar mirror and Y-axis bar mirror on the top plate of the alignment stage for printing object and the holding position of the printing object. By detecting based on the information, the position of the X-axis bar mirror and the Y-axis bar mirror provided on the top plate of the plate alignment stage of the plate table and the detection of the angle and posture of one of the bar mirrors are used. The position and angular orientation of the plate held on the top plate can be easily and reliably detected, and the positions of the X-axis bar mirror and the Y-axis bar mirror provided on the top plate of the alignment stage for the printing target of the printing target table; On the top plate based on the detection of the angle orientation of one of the bar mirrors The position and angle orientation of the held print target can be easily and reliably detected. Therefore, since it is possible to accurately detect a minute positional deviation from a predetermined target position and angular orientation generated in a printing target or printing target that receives a printing pressure load from a blanket roll, a plate alignment stage is provided on the plate table. Therefore, it is possible to correct a slight misalignment between the plate held via the print target and the print target held on the print target table via the print target alignment stage, thereby further improving the printing accuracy.
(4) As a means for detecting the position and angle of the plate held on the plate table running directly under the blanket roll via the plate alignment stage, an X-axis bar mirror and a Y-axis are mounted on the top plate of the plate alignment stage. A bar mirror is provided, and the distance between two bar mirrors in the longitudinal direction of one of the bar mirrors provided on the top plate of the plate alignment stage and one of the other bar mirrors is set to each bar mirror. A position sensor for measuring from a direction orthogonal to the longitudinal direction of the print, and detecting the position and angle orientation of the print object held on the print object table running directly under the blanket roll via the print object alignment stage As a means, the top of the alignment stage for the printing object is used. The plate is provided with an X-axis bar mirror and a Y-axis bar mirror, and two bar mirrors provided on the top plate of the alignment stage for printing are arranged at two positions in the longitudinal direction of one of the bar mirrors and the other bar mirror. A distance sensor for measuring the distance to one place from a direction orthogonal to the longitudinal direction of each bar mirror, and a distance measurement result to the corresponding bar mirror by each distance sensor, and an apparatus The position and angle orientation of each bar mirror can be detected based on the installation position information of each distance sensor that is apparent in configuration, and the detected position and angle orientation of each bar mirror and the plate and printing objects that are apparent in the apparatus configuration Location and plate for each bar mirror on the top plate of each alignment stage Based on the relative placement of information between the holding points, it is possible to detect the position and angle orientation of said plate and printed, the apparatus configuration to obtain the above effect (3) can be easily realized.
(5) Each X-axis bar mirror and each Y-axis bar mirror provided on each top plate of the plate alignment stage and printing target alignment stage are arranged along the longitudinal direction of the guide rail and the direction orthogonal thereto, and a blanket roll A distance sensor is provided in an inward direction along the direction perpendicular to the longitudinal direction of the guide rail at a position on the one side of the guide rail near the position immediately below the guide rail, and the distance sensor directly below the blanket roll. The distance to the X-axis bar mirror provided on the top plate of the plate alignment stage on the plate table traveling on the plate, and the X provided on the top plate of the alignment stage for printing on the table to be printed traveling directly under the blanket roll The configuration is such that the distance to the axis bar mirror can be measured together. As a result, the number of distance sensors required to realize the configuration (4) can be reduced, so that the device configuration can be simplified and a cost reduction effect is expected. it can.

1 is a schematic plan view showing an embodiment of a printing position error correction method and apparatus according to the present invention. FIG. 2 is a schematic side view of the printing position error correction device in FIG. 1. It is a side view which shows the outline | summary of the whole structure of the offset printing apparatus to which this invention is applied. It is a schematic plan view which shows the use condition in the retransfer process of the printing position error correction apparatus of FIG. It is a schematic side view which shows the use condition in the retransfer process of the printing position error correction apparatus of FIG. It is a schematic plan view which shows the other form of implementation of this invention. It is a schematic plan view which shows other form of implementation of this invention. It is a schematic diagram which shows an example of the method conventionally proposed in order to improve the printing precision of offset printing.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 to FIG. 5 show an example of application to an offset printing apparatus as shown in FIG. 3 as one embodiment of the printing position error correction method and apparatus of the present invention.

  Here, first, the basic configuration of the offset printing apparatus shown in FIG. 3 will be outlined. The offset printing apparatus has a guide rail 10 extending in one direction (X-axis direction) on the upper side of the horizontal base 9, for example, Provided in pairs. As the moving table for holding the flat plate 11 and the flat printing object 12 such as the substrate on the upper surface portion, for example, the plate 11 and the printing object 12 can be individually held on the guide rail 10. The plate table 13 and the printing target table 14 are movably attached via individual guide blocks 15 in a state in which the plate table 13 and the printing target table 14 are arranged in order from one end side in the longitudinal direction of the guide rail 10 (left side in FIG. 3). Each of the tables 13 and 14 is provided with an individual drive device such as a linear motor (not shown) so as to be able to reciprocate (run) independently along the guide rail 10, and on the gantry 9 The position of the plate table 13 and the printing target table 14 along the longitudinal direction of the guide rail 10, that is, a required point in the X-axis direction, is defined by a linear scale (not shown) provided along the guide rail 10 at a required location. The absolute position (coordinates) to be detected can be detected.

  Further, at a midway position where the plate table 13 and the printing target table 14 can travel together in the longitudinal direction of the guide rail 10, for example, at a required position on the gantry 9 corresponding to the longitudinal intermediate position of the guide rail 10, A blanket roll 17 disposed in a direction (Y-axis direction) perpendicular to the longitudinal direction of the guide rail 10 at a position above the required dimension of the guide rail 10, and a rotational drive such as a motor for rotationally driving the blanket roll 17 A transfer mechanism 16 including a mechanism 18 and a drive mechanism 19 for raising and lowering such as a ball screw mechanism for raising and lowering the blanket roll 17 is provided. As a result, the blanket roll 17 of the transfer mechanism section 16 is moved up and down by the elevating drive mechanism 19 in a state where the blanket roll 17 is rolled by the rotation drive mechanism 18 and travels on the guide rail 10. The inked plate 11 held above is brought into contact from above, and then the blanket roll 17 is brought into contact with the printing object 12 held on the printing object table 14 running on the guide rail 10 from above. Thus, it is possible to perform a printing process by an ink transfer (acceptance) step from the plate 11 to the blanket roll 17 and an ink retransfer (printing) step from the blanket roll 17 to the printing object 12. It is.

  Further, the gantry is located at another halfway position in which the plate table 13 can travel in the longitudinal direction of the guide rail 10, for example, at a position away from the transfer mechanism portion 16 toward one end in the longitudinal direction of the guide rail 10. 9 is provided with an inking device 20 for inking the plate 11 held on the plate table 13 at a required position on the plate 9.

  Furthermore, a plate table waiting area 21 for moving the plate table 13 to the one end in the longitudinal direction of the guide rail 10 and waiting is provided at a position corresponding to one end in the longitudinal direction of the guide rail 10 on the gantry 9. The printing target table 14 is moved to the other end in the longitudinal direction of the guide rail 10 at a position corresponding to the other longitudinal end of the guide rail 10 on the gantry 9 and is in a standby state. On the other hand, a configuration is provided with a print target installation area 22 for attaching a new print target 12 and removing the print target 12 after printing.

  The printing position error correction apparatus of the present invention applied to the offset printing apparatus having the above-described configuration is configured as shown in FIGS.

  That is, the top plate 24 is attached to the upper side of the alignment drive mechanism 25 having a three-axis or four-axis drive unit (not shown). Direction and rotational direction, specifically, horizontal movement in the longitudinal direction (X-axis direction) of the guide rail 10 and the direction orthogonal to the longitudinal direction (Y-axis direction), and the yaw angle (θ) with respect to the longitudinal direction of the guide rail 10 A plate alignment stage 23 that can be precisely driven with respect to the rotation of the plate is provided on the plate table 13 and above the top plate 24 of the plate alignment stage 23 on the plate table 13. The plate 11 can be held.

  Furthermore, a Y-axis bar mirror 26 that extends along the Y-axis direction above the edge of the top plate 24 of the plate alignment stage 23 that faces one end in the longitudinal direction of the guide rail 10 (left side in FIGS. 1 and 2). And an X-axis bar mirror 27 extending along the X-axis direction is provided above the edge of the top plate 24 on one end side in the Y-axis direction.

  The Y-axis bar mirror 26 and the X-axis bar mirror 27 are set so that the height dimension thereof is lower than the required height than the height position of the upper surface of the plate 11 held on the top plate 24. Thus, the blanket roll 17 is brought into contact with the upper surface of the plate 11 held on the top plate 24 of the plate alignment stage 23 of the plate table 13 with the required printing pressure applied by the transfer mechanism 16. Sometimes, the blanket roll 17 is not in contact with the Y-axis bar mirror 26 and the X-axis bar mirror 27.

  Similarly to the plate alignment stage 23, the top plate 29 is attached to the upper side of the alignment drive mechanism 30 having a three-axis or four-axis drive unit (not shown). The mechanism 30 can precisely drive the horizontal movement of the guide rail 10 in the longitudinal direction (X-axis direction) and the direction orthogonal thereto (Y-axis direction) and the rotation of the yaw angle (θ) with respect to the longitudinal direction of the guide rail 10. The print target alignment stage 28 is provided on the print target table 14, and on the print target table 14 above the top plate 29 of the print target alignment stage 28. 12 can be held.

  Further, the Y axis extends along the Y axis direction above the edge of the top plate 29 of the alignment stage for printing 28 on the other end in the longitudinal direction of the guide rail 10 (the right side in FIGS. 1 and 2). A bar mirror 31 is provided, and an X-axis bar mirror 32 extending along the X-axis direction is provided above the one end side edge in the Y-axis direction of the top plate 29.

  The Y-axis bar mirror 31 and the X-axis bar mirror 32 are set so that the height dimension thereof is lower than the required height than the height position of the upper surface of the printing target 12 held on the top plate 29. With this, a required printing pressure is applied to the upper surface of the printing target 12 holding the blanket roll 17 on the top plate 29 of the printing target alignment stage 28 of the printing target table 14 by the transfer mechanism unit 16. The blanket roll 17 is prevented from coming into contact with the Y-axis bar mirror 31 and the X-axis bar mirror 32 even when contacting in the state.

  Further, when the plate table 13 and the printing target table 14 travel respectively directly below the blanket roll 17 of the transfer mechanism section 16, the top plates 24 of the alignment stages 23 and 28 of the tables 13 and 14, respectively. 29, the Y-axis bar mirrors 26 and 31 and the X-axis bar mirrors 27 and 32 provided on 29 have a required distance of 2 at one position of the Y-axis bar mirrors 26 and 31 and the longitudinal direction of the X-axis bar mirrors 27 and 32 (X-axis direction). A distance sensor is provided for individually measuring the distances to two locations in the longitudinal direction (Y-axis direction) of the Y-axis bar mirrors 26, 31 and one location of the X-axis bar mirrors 27, 32. At the same time, on the basis of signals input from the distance sensors, the alignment driving mechanisms 25 of the plate table 13 and the printing target table 14 are used. A configuration in which a control unit 33 to provide a correction command to the 30.

  Specifically, in the Y-axis direction corresponding to the intermediate portion in the longitudinal direction of the Y-axis bar mirror 26 provided on the top plate 24 of the plate alignment stage 23 on the plate table 13 outside the longitudinal end of the gantry 9. At a required position and at a height corresponding to the Y-axis bar mirror 26, a laser length measuring device 34 as a distance sensor is disposed inward along the X-axis direction so as to face the Y-axis bar mirror 26. Then, it is attached to a required fixing part by an attaching means (not shown). Thus, when the plate table 13 travels directly under the blanket roll 17 of the transfer mechanism section 16, the laser length measuring device 34 is provided on the top plate 24 of the plate alignment stage 23 of the plate table 13. The distance along the X-axis direction up to one middle portion in the longitudinal direction of a certain Y-axis bar mirror 26 can be measured.

  Further, the Y-axis direction corresponding to the intermediate portion in the longitudinal direction of the Y-axis bar mirror 31 provided on the top plate 29 of the alignment stage 28 for printing on the printing object table 14 outside the other longitudinal end of the gantry 9. A laser length measuring device 35 as a distance sensor is disposed inward along the X-axis direction so as to face the Y-axis bar mirror 31 at a required position and at a height corresponding to the Y-axis bar mirror 31. Then, it is attached to a required fixing part by an attaching means (not shown). As a result, when the printing target table 14 travels directly below the blanket roll 17 of the transfer mechanism section 16, the laser length measuring device 35 causes the laser target length measurement device 35 to place the printing target table 14 on the top plate 29 of the printing target alignment stage 28. It is possible to measure the distance along the X-axis direction up to one middle portion in the longitudinal direction of the Y-axis bar mirror 31 provided in FIG.

  Furthermore, at two locations that are apart from each other in the X-axis direction from the position directly below the straight line along the axis of the blanket roll 17 of the transfer mechanism 16 outside the one end side of the frame 9 in the Y-axis direction, and Capacitance as a distance sensor at a position corresponding to the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the plate table 13 and the printing target table 14. The displacement gauges 36a and 36b are arranged inward along the Y-axis direction, and are attached to a required fixing portion by attachment means (not shown). As a result, when the plate table 13 and the printing target table 14 run under the blanket roll 17 of the transfer mechanism section 16, the top plates 24, 29 of the alignment stages 23, 28 of the tables 13, 14 are used. The X-axis bar mirrors 27 and 32 provided on the upper side pass through positions near the front of the capacitance displacement meters 36a and 36b in a state of facing the capacitance displacement meters 36a and 36b, respectively. In this case, the X-axis bar mirrors 27, 27 provided on the top plates 24, 29 of the alignment stages 23, 28 of the tables 13, 14 are detected by the capacitance displacement meters 36 a, 36 b. 32, the distance along the Y-axis direction up to two positions located in front of each capacitance displacement meter 36a, 36b can be individually measured. It is to so that.

  The controller 33 includes information on the installation positions (positions in the X-axis direction and the Y-axis direction) of the laser length measuring instruments 34 and 35 and the capacitance displacement meters 36a and 36b, and the plate Information on the relative arrangement of the Y-axis bar mirror 26 and X-axis bar mirror 27 on the top plate 24 of the plate alignment stage 23 of the table 13 and the holding position of the plate 11, and the print target alignment stage 28 of the print target table 14. The information on the relative arrangement of the Y-axis bar mirror 31 and the X-axis bar mirror 32 on the top plate 29 and the holding location of the print target 12 is stored (accumulated) in advance.

  Further, the controller 33 receives the top plate 24 of the plate alignment stage 23 of the plate table 13 from the laser length measuring device 34 when the plate table 13 travels immediately below the blanket roll 17 of the transfer mechanism section 16. When a measurement signal of a distance along the X-axis direction up to one middle portion in the longitudinal direction of the Y-axis bar mirror 26 provided above is input, the measured distance in the X-axis direction is stored in advance. Based on the installation position information of the laser length measuring device 34, the position of the Y-axis bar mirror 26 provided on the top plate 24 of the plate alignment stage 23 of the plate table 13 is detected, Based on the information on the relative arrangement of the location where the Y-axis bar mirror 26 is installed and the location where the plate 11 is held on the top plate 24 stored in advance, the plate table 13 The X-axis direction position of the top plate plate 11 which is held on the 24 use the alignment stage 23 are as a function of detecting in real time.

  Further, when the plate table 13 travels directly below the blanket roll 17 of the transfer mechanism section 16, the controller 33 uses the electrostatic capacitance type displacement gauges 36a and 36b to detect the plate alignment stage of the plate table 13. When measurement signals of distances along the Y-axis direction up to two positions located in front of the capacitance displacement meters 36a and 36b in the X-axis bar mirror 27 provided on the top plate 24 are respectively input. The top of the plate alignment stage 23 of the plate table 13 is based on the measured distances in the Y-axis direction and the installation position information of the capacitance displacement meters 36a and 36b stored in advance. The position in the Y-axis direction is detected at two locations in the longitudinal direction (X-axis direction) of the X-axis bar mirror 27 provided on the plate 24, and at each detected location. X-axis position of the X-axis bar mirror 27 is determined from the difference in the Y-axis direction position of the X-axis bar mirror 27 and the interval between the two X-axis directions measured by the capacitance displacement gauges 36a and 36b. An angle and orientation with respect to the direction is detected, and the plate table 13 is based on the information on the relative arrangement of the X-axis bar mirror 27 installation location and the plate 11 holding location on the top plate 24 stored in advance. The plate 11 has a function of detecting in real time the position of the plate 11 held on the top plate 24 of the plate alignment stage 23 in the Y-axis direction and the angle and orientation of the plate 11 with respect to the X-axis direction.

  Furthermore, the controller 33 moves the plate table 13 on the top plate 24 of the plate alignment stage 23 of the plate table 13 as described above when the plate table 13 travels directly below the blanket roll 17 of the transfer mechanism section 16. When the held position of the plate 11 in the X-axis direction and the Y-axis direction and the angular orientation of the plate 11 with respect to the X-axis direction are detected in real time, the detected plate 11 in the X-axis direction and the Y-axis direction are detected. The position and angle of the original X axis that the plate 11 held on the top plate 24 of the plate alignment stage 23 should be positioned at that time as the plate 11 travels along the guide rail 10 of the plate table 13. Position correction for the X-axis direction and the Y-axis direction necessary to match the target position and the angle posture that are the angle posture along the X-axis direction and the position in the direction and the Y-axis direction. And a correction command corresponding to the obtained position correction amount and angle correction amount are sequentially given to the alignment drive mechanism 25 of the plate alignment stage 23 of the plate table 13. It has a function.

  In the above description, the plate 11 held on the top plate 24 of the plate alignment stage 23 that is the target position for the controller 33 to obtain the position correction amount of the plate 11 in the X-axis direction is the plate table 13. The original position in the X-axis direction that should be positioned along with the travel along the guide rail 10 is determined by the controller 33 from the linear scale (not shown) provided on the mount 9 in the X-axis direction of the plate table 13. In this way, the controller 33 detects the position of the plate table 13 in the X-axis direction in real time, and detects the detected position of the plate table 13 in the X-axis direction. It is determined based on the relative arrangement of the holding positions of the plate 11 on the top plate 24 of the plate alignment stage 23 in the table 13.

  On the other hand, when the printing target table 14 travels directly below the blanket roll 17 of the transfer mechanism unit 16, the controller 33 receives the printing target alignment stage of the printing target table 14 input from the laser length measuring device 35. 28, the measurement signal of the distance along the X-axis direction to one central portion in the longitudinal direction of the Y-axis bar mirror 31 provided on the top plate 24, and the installation position information of the laser length measuring device 35 stored in advance. Based on the above, the position of the Y-axis bar mirror 31 provided on the top plate 29 of the printing target alignment stage 28 of the printing target table 14 is detected in the X-axis direction, and the top plate 29 stored in advance is then detected. Based on the information on the relative arrangement of the Y-axis bar mirror 31 and the holding location of the print target 12 above, the print target test is performed. The X-axis direction position of the print target 12 held on the top plate 29 to be printed for the alignment stage 28 of the cable 14 are so provided with a function of detecting in real time.

  Further, when the print target table 14 travels directly below the blanket roll 17 of the transfer mechanism section 16, the controller 33 prints the print target table 14 from the capacitance displacement meters 36a and 36b. Measurement signals of distances along the Y-axis direction up to two positions located in front of the capacitance displacement gauges 36a and 36b in the X-axis bar mirror 32 provided on the top plate 29 of the alignment stage 28 are respectively input. Then, based on the measured distances in the Y-axis direction and the installation position information of the capacitance displacement gauges 36a and 36b stored in advance, the print target table 14 is used for the print target. The position in the Y-axis direction is detected at two positions in the longitudinal direction (X-axis direction) of the X-axis bar mirror 32 provided on the top plate 29 of the alignment stage 28. In addition, from the difference between the detected positions in the Y-axis direction for each location and the interval between the two locations in the X-axis bar mirror 32 measured by the capacitance displacement meters 36a and 36b in the X-axis direction, The angular orientation of the X-axis bar mirror 32 with respect to the X-axis direction is detected, and the relative arrangement of the installation location of the X-axis bar mirror 32 and the holding location of the print target 12 on the top plate 29 stored in advance is further determined. Based on this information, the Y-axis direction position of the print target 12 held on the top plate 29 of the print target alignment stage 28 of the print target table 14 and the angular orientation of the print target 12 with respect to the X-axis direction are real-time. It has a function to detect.

  Furthermore, when the printing target table 14 travels directly below the blanket roll 17 of the transfer mechanism unit 16, the controller 33 performs the top plate of the printing target alignment stage 28 of the printing target table 14 as described above. When the X-axis direction position and the Y-axis direction position of the print target 12 held on the head 29 and the angular orientation of the print target 12 with respect to the X-axis direction are detected in real time, the detected X-axis of the print target 12 is detected. The print target 12 held on the top plate 29 of the print target alignment stage 28 should be positioned at that time as the print target table 14 travels with respect to the position and the angle orientation in the direction and the Y-axis direction. X required to match the original position in the X-axis direction and Y-axis direction with the target position and angle attitude that are the angle attitude along the X-axis direction And a correction command corresponding to the obtained position correction amount and angle correction amount are provided for the print target alignment of the print target table 14. A function of sequentially providing the alignment drive mechanism 30 of the stage 28 is provided.

  In the above description, the print object 12 held on the top plate 29 of the print object alignment stage 28 serving as a target position for obtaining the position correction amount in the X-axis direction of the print object 12 by the controller 33 is printed. The original X-axis direction position that should be positioned along with the travel of the target table 14 along the guide rail 10 is determined by the controller 33 from the linear scale (not shown) provided on the gantry 9 in the controller 33. 14 so that the detection signal of the position in the X-axis direction is input, the controller 33 detects the position in the X-axis direction of the print target table 14 in real time, and the detected print target table 14 The X-axis direction position and the print target 12 on the top plate 29 of the print target alignment stage 28 in the print target table 14 The relative disposition of the lifting points shall we have to ask the group.

  When the printing operation is performed by the offset printing apparatus having the printing position error correcting apparatus of the present invention having the above-described configuration, the plate table 13 holding the plate 11 in advance on the upper side of the top plate 24 of the plate alignment stage 23 is installed. An appropriate amount of ink is inked into the plate 11 by sending to the king device 20.

  Next, the plate table 13 holding the inked plate 11 is moved to the transfer mechanism 16 as shown in FIGS. 1 and 2, and is rolled by the rotation drive mechanism 18 (see FIG. 3). The blanket roll 17 is moved at a movement speed synchronized with the peripheral speed of the blanket roll 17 to run in a direction along the rotational direction of the blanket roll 17 (left direction in FIGS. 1 and 2), and the plate table 13 The blanket roll 17 is brought into contact with the plate 11 held on the plate 11 from above with a required printing pressure, and a transfer (accepting) step is performed.

  At this time, the X-axis bar mirror 27 provided on the top plate 24 of the plate alignment stage 23 of the plate table 13 moves to the front of the capacitance displacement meters 36a and 36b as the plate table 13 travels. As the travel proceeds, the capacitance displacement gauges 36a and 36b measure the distance in the Y-axis direction to the position located in front of the X-axis bar mirror 27. Further, the distance to the Y-axis bar mirror 26 provided on the top plate 24 of the plate alignment stage 23 is measured by the laser length measuring device 34.

  Therefore, the controller 33 to which the measurement signals are input from the laser length measuring device 34 and the capacitance displacement meters 36a and 36b is provided on the top plate 24 of the plate alignment stage 23 of the plate table 13. The Y-axis bar mirror 26 in the X-axis direction, the Y-axis direction position of the X-axis bar mirror 27 at the two positions located in front of the capacitance displacement meters 36a and 36b, and the X-axis bar mirror 27 The angle and orientation with respect to the X-axis direction is detected in real time, and based on the detection result, the positions of the plate 11 held on the top plate 24 of the plate alignment stage 23 of the plate table 13 in the X-axis direction and the Y-axis direction. Then, the angular attitude of the plate 11 with respect to the X-axis direction is detected in real time.

  During the transfer (accepting) step, the plate alignment stage 23, which is a support structure of the plate 11 that receives a load of printing pressure from the rolling blanket roll 17, the plate table 13, and the plate table 13 are guided rails. At least one of the guide blocks 15 supported on the plate 10 is distorted. Due to the distortion, the plate table 13 is held on the top plate 24 together with the top plate 24 of the plate alignment stage 23. When a minute positional shift in which one or more of the X-axis direction, the Y-axis direction, and the rotation direction is combined occurs in a certain plate 11, the controller 33 causes the plate 11 held on the top plate 24. The position of the plate 11 in the X-axis direction and the Y-axis direction detected in real time with the above-described minute positional deviation included, and the angle of the plate 11 with respect to the X-axis direction To the target position and angle posture that are the original X-axis direction and Y-axis direction positions where the plate 11 held on the top plate 24 should be positioned at that time and the angular posture along the X-axis direction. A position correction amount and an angle correction amount related to the X-axis direction and the Y-axis direction necessary for the determination are immediately obtained, and a correction command corresponding to the obtained position correction amount and angle correction amount is sent from the controller 33 to the plate. This is applied to the alignment drive mechanism 25 of the plate alignment stage 23 of the table 13.

  Therefore, the plate table 13 is held on the top plate 24 by precise driving in the X-axis direction and the Y-axis direction and the rotation direction of the top plate 24 by the alignment drive mechanism 25 of the plate alignment stage 23. The displacement of the plate 11 is corrected so that it matches the target position and angle orientation, that is, the original position in the X-axis direction and Y-axis direction and the angle orientation along the X-axis direction.

  Accordingly, in the transfer (acceptance) step, even if a slight misalignment occurs in the plate 11 that receives a printing pressure load from the blanket roll 17, the misalignment is immediately corrected, so that the blanket from the plate 11 is corrected. The possibility that the print pattern transferred (received) to the roll 17 is displaced is prevented.

  After the transfer (acceptance) step is completed as described above, the printing target table 14 holding the printing target 12 is moved to the transfer mechanism section 16 as shown in FIGS. 13, the position immediately below the blanket roll 17 at a moving speed synchronized with the peripheral speed of the blanket roll 17 that causes the printing target table 14 to roll by the rotation drive mechanism 18 (see FIG. 3), The blanket roll 17 is moved in a direction along the rotation direction of the blanket roll 17 (left direction in FIGS. 4 and 5), and the blanket roll 17 is brought into contact with the plate 11 with respect to the print target 12 held on the print target table 14. A re-transfer (printing) process is performed by making contact at a required printing pressure from the upper side in the same phase as in the above.

  At this time, the X-axis bar mirror 32 provided on the top plate 29 of the print target alignment stage 28 of the print target table 14 moves the electrostatic capacitance type displacement gauges 36 a and 36 b as the print target table 14 travels. The distance in the Y-axis direction to each of the X-axis bar mirrors 32 located in front of each of the X-axis bar mirrors 32 is measured by the capacitance displacement gauges 36a and 36b. Further, the distance to the Y-axis bar mirror 31 provided on the top plate 29 of the alignment stage 28 for printing is measured by the laser length measuring device 35.

  Therefore, in the controller 33 to which the measurement signals are input from the laser length measuring device 35 and the capacitance displacement gauges 36a and 36b, on the top plate 29 of the alignment stage 28 for the printing target table 14. The position of the Y-axis bar mirror 31 provided in the X-axis direction, the position of the X-axis bar mirror 32 in the Y-axis direction at the two positions located in front of the capacitance displacement meters 36a and 36b, and the X-axis bar mirror 32 is detected in real time in the X-axis direction, and based on the detection result, the X-axis direction of the print target 12 held on the top plate 29 of the print target alignment stage 28 of the print target table 14 and The position in the Y-axis direction and the angular orientation of the print target 12 with respect to the X-axis direction are detected in real time.

  During the re-transfer (printing) step, the print object alignment stage 28, which is a support structure of the print object 12 that receives a load of printing pressure from the rolling blanket roll 17, the print object table 14, and the print object At least one of the guide blocks 15 that support the table 14 on the guide rail 10 is distorted, and due to the distortion, the top together with the top plate 29 of the alignment stage 28 for printing of the table 14 to be printed. When a minute positional shift in which any one or more of the X-axis direction, the Y-axis direction, and the rotation direction are combined occurs on the print target 12 held on the plate 29, the controller 33 causes the top plate 29, the X-axis direction detected in real time in a state in which the above-described minute positional deviation is included in the print target 12 held on The position in the axial direction and the angular orientation of the printing object 12 with respect to the X-axis direction are set in the original X-axis direction and Y-axis direction in which the printing object 12 held on the top plate 29 should be positioned at that time. The position correction amount and the angle correction amount related to the X-axis direction and the Y-axis direction necessary for matching the position and the target position and the angle posture that are the angle posture along the X-axis direction are immediately obtained, and the obtained position correction amount Then, a correction command corresponding to the angle correction amount is given from the controller 33 to the alignment drive mechanism 30 of the print target alignment stage 28 of the print target table 14.

  Therefore, on the print target table 14, the top plate 29 is precisely driven in the X axis direction and the Y axis direction and the rotation direction of the top plate 29 by the alignment drive mechanism 30 of the print target alignment stage 28. The positional deviation is corrected so that the held print object 12 matches the target position and angle orientation, that is, the original X-axis direction and Y-axis direction positions and the angle orientation along the X-axis direction. .

  Accordingly, in the retransfer (printing) step, even if a slight misalignment occurs in the printing object 12 that receives a printing pressure load from the blanket roll 17, the misalignment is immediately corrected, so that the blanket roll From 17, it is possible to prevent the occurrence of positional deviation in the print pattern retransferred (printed) to the print object 12.

  As described above, according to the printing position error correction method and apparatus of the present invention, when performing the offset printing process, a minute positional deviation occurs in the plate 11 or the printing target 12 that receives the printing pressure load from the blanket roll 17. Since the misalignment can be corrected immediately, after transferring (receiving) from the plate 11 to the blanket roll 17 in the transfer (accepting) process, the printing is re-transferred from the blanket roll 17 to the printing object 12 in the re-transfer (printing) process. Since it is possible to prevent the occurrence of positional deviation in the printing pattern to be transferred (printed), it is possible to prevent the possibility of causing an error in the printing position and improve the reproducibility of the printing pattern.

  Therefore, as in the case of forming an electrode pattern such as a liquid crystal display on a substrate to be printed 12 by printing, precise printing that requires a positional deviation of the printing position to be suppressed to several μm or less is performed. It becomes possible to carry out with high precision.

  Next, FIG. 6 shows an application example of the embodiment of FIG. 1 to FIG. 5 as another embodiment of the present invention. In the same configuration as shown in FIG. 1 and FIG. When the printing target table 14 travels directly under the blanket roll 17 of the transfer mechanism section 16, the X axis provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the tables 13 and 14, respectively. Instead of a configuration using two capacitance type displacement gauges 36a and 36b as distance sensors for individually measuring the distances up to two places in the longitudinal direction (X axis direction) of the bar mirrors 27 and 32, 2 In this configuration, two laser length measuring devices 37 and 38 are used.

  More specifically, the laser length measuring devices 37 and 38 as the two distance sensors are located outside at one end side in the Y-axis direction of the gantry 9 and at positions outside the both ends in the X-axis direction of the gantry 9. Blanket roll 17 along the X-axis direction at a height corresponding to each X-axis bar mirror 27, 32 provided on each top plate 24, 29 of each alignment stage 23, 28 of plate table 13 and printing target table 14. Are opposed to each other so as to face a position directly below a straight line along the axis of the shaft, and are attached to a required fixing portion by attachment means (not shown).

  The plate table is located at two locations apart from each other in the X-axis direction from the position directly below the straight line along the axis of the blanket roll 17 of the transfer mechanism section 16 outside the one end side in the Y-axis direction of the gantry 9. 13 and the laser measuring instruments 37 and 38 at positions corresponding to the X-axis bar mirrors 27 and 32 on the top plates 24 and 29 of the alignment stages 23 and 28 of the table 14 to be printed. Reflecting mirrors 39 and 40 are provided respectively, and laser beams emitted from the laser length measuring devices 37 and 38 along the X-axis direction are respectively sent in the direction along the Y-axis direction by the corresponding reflecting mirrors 39 and 40, respectively. Each of the plate table 13 and the printing target table 14 that is reflected and travels directly below the blanket roll 17 of the transfer mechanism 16 is arranged. By irradiating two places in the longitudinal direction (X-axis direction) of the X-axis bar mirrors 27 and 32 on the top plates 24 and 29 of the ment stage 23 and 28, the distances to the respective positions are individually measured. I can do it.

  Further, as described above, the laser length measuring devices 37 and 38 are used in place of the two capacitance displacement meters 36a and 36b used in the embodiment of FIGS. In view of this, the controller 33 of the present embodiment uses the laser length measuring units 37 and 38 when the plate table 13 and the printing target table 14 travel directly under the blanket roll 17 of the transfer mechanism unit 16. Measurement of distances to two required distances in the longitudinal direction (X-axis direction) in the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the tables 13 and 14, respectively. When signals are respectively input, the measured distances and the installation positions of the laser length measuring devices 37 and 38 and the reflecting mirrors 39 and 40 that are stored in the controller 33 in advance. On the basis of the information, two longitudinal positions (X-axis direction) of the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the tables 13 and 14 are described. The position in the Y-axis direction is detected, and the difference between the positions in the Y-axis direction at each position where the Y-axis direction position is detected, and the distance in the X-axis direction between the two positions where the respective Y-axis direction positions are detected The angle posture of each of the X-axis bar mirrors 27 and 32 with respect to the X-axis direction is detected. Further, the position of the X-axis bar mirrors 27 and 32 on the top plates 24 and 29 and the top plates 24 and 29 are detected. The plate 11 held on the top plate 24 of the plate alignment stage 23 of the plate table 13 on the basis of the information on the relative arrangement of the plate 11 and the location where the printing object 12 is held, and A function for detecting in real time the Y-axis direction position and the angle orientation with respect to the X-axis direction of the print target 12 held on the top plate 29 of the print target alignment stage 28 of the print target table 14. It is as.

  Other configurations are the same as those shown in FIGS. 1 to 5, and the same components are denoted by the same reference numerals.

  Also according to this embodiment, the same effect as that of the embodiment of FIGS. 1 to 5 can be obtained.

  Further, the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the plate table 13 and the printing target table 14 that run immediately below the blanket roll 17 of the transfer mechanism unit 16 are provided. Since the degree of freedom of arrangement of the two laser length measuring devices 37 and 38 used for individually measuring the distance to the two required distances in the longitudinal direction (X-axis direction) is increased, the design can be made easier. Can be expected.

  Next, FIG. 7 shows a modification of the embodiment of FIGS. 1 to 5 as still another embodiment of the present invention. In the same configuration as shown in FIGS. 1 and 5, the plate table 13 and When the printing target table 14 travels directly below the blanket roll 17 of the transfer mechanism section 16, each Y provided on each top plate 24, 29 of each alignment stage 23, 28 of each table 13, 14. Among the axial bar mirrors 26 and 31, and the X-axis bar mirrors 27 and 32, the Y-axis bar mirrors 26 and 31 have a distance along the X-axis direction to one of the longitudinal intermediate portions as a measurement target. Measurement is performed by each of the laser length measuring devices 34 and 35 as individual distance sensors, and the longitudinal direction (X-axis direction) of each of the X-axis bar mirrors 27 and 32 is measured. Instead of the configuration in which the two distances along the Y-axis direction to the respective locations are measured with the two capacitance displacement gauges 36a and 36b as the distance sensors, the respective tables 13 described above are measured. 14 of the Y-axis bar mirrors 26 and 31 and the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28, respectively. Measuring two distances along the X-axis direction to the two points in the longitudinal direction (Y-axis direction) required distance, the laser length measuring devices 41a, 41b and 42a, 42b as two distance sensors, respectively. In addition, for each of the X-axis bar mirrors 27 and 32, a distance along the Y-axis direction to one place in the longitudinal direction as a measurement target is defined as a distance sensor. It is obtained by a configuration to measure a single capacitance type displacement gauge 43.

  More specifically, it corresponds to two required intervals in the longitudinal direction (Y-axis direction) of the Y-axis bar mirror 26 provided on the top plate 24 of the plate alignment stage 23 of the plate table 13 outside the longitudinal end of the gantry 9. Laser length measuring devices 41a and 41b as distance sensors at two positions in the Y-axis direction and at heights corresponding to the Y-axis bar mirror 26 in the X-axis direction so as to face the Y-axis bar mirror 26. It is arranged inwardly along, and is attached to a required fixing portion by attachment means (not shown). As a result, when the plate table 13 travels directly below the blanket roll 17 of the transfer mechanism section 16, the top plates 24 of the plate alignment stage 23 of the plate table 13 are used by the laser length measuring devices 41 a and 41 b. The distance along the X-axis direction up to two positions located in front of the laser length measuring devices 41a and 41b in the longitudinal direction of the Y-axis bar mirror 26 provided above can be individually measured. .

  In addition, two places in the longitudinal direction (Y-axis direction) of the Y-axis bar mirror 31 provided on the top plate 29 of the alignment stage 28 for the printing object on the printing object table 14 outside the other end in the longitudinal direction of the gantry 9. X-axis so that the laser length measuring devices 42a and 42b as distance sensors face the Y-axis bar mirror 31 at two positions in the Y-axis direction corresponding to and at a height corresponding to the Y-axis bar mirror 31. It arrange | positions inward along a direction and it attaches to a required fixing | fixed part by the attachment means which is not shown in figure. As a result, when the printing object table 14 travels directly below the blanket roll 17 of the transfer mechanism unit 16, the laser measuring devices 42a and 42b cause the printing object alignment stage 28 of the printing object table 14 to move. The distance along the X-axis direction can be individually measured up to two positions located in front of each of the laser length measuring devices 42a and 42b in the longitudinal direction of the Y-axis bar mirror 31 provided on the top plate 29. .

  Further, the position directly below or near the straight line along the axis of the blanket roll 17 of the transfer mechanism 16 outside the one end side of the frame 9 in the Y-axis direction, for example, directly below the straight line along the axis of the blanket roll 17. Each X-axis bar mirror provided at a position slightly shifted from the position to one end in the longitudinal direction of the guide rail 10 and on each of the top plates 24 and 29 of the alignment stages 23 and 28 of the plate table 13 and the printing target table 14. 27 and 32, one capacitive displacement meter 43 as a distance sensor is inward along the Y-axis direction (in the direction toward the guide rail 10 installation location on the gantry 9). Arrange it and attach it to the required fixed part by attachment means (not shown). As a result, when the plate table 13 and the printing target table 14 run under the blanket roll 17 of the transfer mechanism section 16, the top plates 24, 29 of the alignment stages 23, 28 of the tables 13, 14 are used. The X-axis bar mirrors 27 and 32 respectively provided on the upper side pass through the position near the front of the capacitance displacement meter 43 in a state of facing the capacitance displacement meter 43. The electrostatic capacity type displacement meter 43 is used for the X axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the tables 13 and 14, respectively. The distance along the Y-axis direction to the position located in front of 43 can be measured.

  Furthermore, as described above, two laser measurements are performed corresponding to the Y-axis bar mirrors 26 and 31 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the tables 13 and 14, respectively. In the present embodiment, in view of the configuration including the long devices 41a, 41b and 42a, 42b, and the one capacitive displacement meter 43 corresponding to each X-axis bar mirror 27, 32, Similar to the controller 33 in the embodiment of FIGS. 1 to 5, the controller 33 a includes the Y-axis bar mirror 26 and the X-axis bar mirror 27 on the top plate 24 of the plate alignment stage 23 of the plate table 13 and the plate 11. Information on the relative arrangement with respect to the holding portion and the Y-axis bar mirror 31 on the top plate 29 of the alignment stage 28 for the printing target table 14. In addition to the information on the relative arrangement between the X-axis bar mirror 32 and the holding location of the printing object 12, each of the laser length measuring devices 41a, 41b and 42a, 42b and the capacitance displacement meter 43 are respectively described. The information on the installation positions (positions in the X-axis direction and the Y-axis direction) is stored (accumulated) in advance, and the controller 33a has the following functions.

  That is, when the plate table 13 travels directly below the blanket roll 17 of the transfer mechanism section 16, the controller 33a controls the plate alignment stage 23 of the plate table 13 from the laser length measuring devices 41a and 41b. Measurement signal of distance along the X-axis direction up to two required intervals in the Y-axis direction positioned in front of each laser length measuring instrument 41a, 41b in the longitudinal direction of the Y-axis bar mirror 26 provided on the top plate 24 Is input to the plate table 13 based on the measured distances in the X-axis direction and the stored position information of the laser length measuring devices 41a and 41b stored in advance. The position in the X-axis direction is detected at two points in the longitudinal direction (Y-axis direction) of the Y-axis bar mirror 26 provided on the top plate 24 of the stage 23. At the same time, the difference between the detected positions in the X-axis direction and the interval between the two Y-axis directions measured by the laser length measuring devices 41a and 41b in the Y-axis bar mirror 26 is calculated as Y. The angle posture of the axis bar mirror 26 with respect to the Y-axis direction is detected, and information on the relative arrangement between the installation position of the Y-axis bar mirror 26 and the holding position of the plate 11 on the top plate 24 stored in advance is obtained. Based on the X-axis direction position of the plate 11 held on the top plate 24 of the plate alignment stage 23 of the plate table 13 and the angle posture with respect to the X-axis direction derived from the angle posture of the plate 11 with respect to the Y-axis direction. It has a function to detect in real time.

  Further, the controller 33a is configured to move the top of the plate alignment stage 23 of the plate table 13 from the electrostatic capacitance type displacement meter 43 when the plate table 13 travels directly below the blanket roll 17 of the transfer mechanism section 16. When a measurement signal of a distance along the Y-axis direction to a position located in front of the capacitive displacement meter 43 in the X-axis bar mirror 27 provided on the plate 24 is input, the measured Y-axis direction Of the X-axis bar mirror 27 provided on the top plate 24 of the plate alignment stage 23 of the plate table 13 on the basis of the distance of the position and the installation position information of the capacitance displacement meter 43 stored in advance. The position in the Y-axis direction is detected, and the relative position between the place where the X-axis bar mirror 27 is installed and the place where the plate 11 is held on the top plate 24 stored in advance. Based on the information of the Do arrangement, it is as a function of detecting a Y-axis direction position of the plate for alignment stage top plate plate 11 which is held on the 24 of 23 of the plate table 13 in real time.

  Furthermore, the controller 33a is arranged on the top plate 24 of the plate alignment stage 23 of the plate table 13 as described above when the plate table 13 travels directly below the blanket roll 17 of the transfer mechanism section 16. When the held position of the plate 11 in the X-axis direction and the Y-axis direction and the angular orientation of the plate 11 with respect to the X-axis direction are detected in real time, the controller 33 is the same as the controller 33 of the embodiment of FIGS. In this process, the position correction amount and the angle correction amount with respect to the X-axis direction and the Y-axis direction of the plate 11 held on the top plate 24 are sequentially obtained, and the obtained position correction amount and angle correction amount are determined. The correction command is sequentially provided to the alignment drive mechanism 25 of the plate alignment stage 23 of the plate table 13.

  On the other hand, when the print target table 14 travels directly below the blanket roll 17 of the transfer mechanism unit 16, the controller 33a prints the print target table 14 input from the laser length measuring devices 42a and 42b. In the X-axis direction up to two required intervals in the Y-axis direction positioned in front of the laser length measuring devices 42a and 42b in the longitudinal direction of the Y-axis bar mirror 31 provided on the top plate 24 of the alignment stage 28 for use. Based on the measurement signal of the distance along the distance and the installation position information of each of the laser length measuring devices 41a and 41b stored in advance, it is provided on the top plate 29 of the alignment stage 28 for the printing object on the printing object table 14. The position in the X-axis direction is detected at two positions in the longitudinal direction (Y-axis direction) of a certain Y-axis bar mirror 31 and the detection is performed. From the difference in the X-axis direction position for each of the portions and the distance between the two Y-axis directions measured by the laser length measuring devices 42a and 42b in the Y-axis bar mirror 31, the Y-axis bar mirror 31 The angle and orientation with respect to the Y-axis direction is detected, and on the basis of information on the relative arrangement of the installation location of the Y-axis bar mirror 31 and the holding location of the print target 12 on the top plate 29 stored in advance. The angle orientation with respect to the X-axis direction derived from the position of the printing subject 12 held on the top plate 29 of the alignment stage 28 for the printing subject table 14 in the X-axis direction and the angle orientation of the printing subject 12 with respect to the Y-axis direction. Is provided with a function of detecting the real time.

  Further, the controller 33a is configured so that when the printing object table 14 travels directly below the blanket roll 17 of the transfer mechanism unit 16, the electrostatic displacement type displacement meter 43 causes the printing object alignment stage 14 to be printed. When the measurement signal of the distance along the Y-axis direction to the position located in front of the capacitance displacement meter 43 in the X-axis bar mirror 32 provided on the 28 top plates 29 is input, the measurement is performed. Based on the distance in the Y-axis direction and the installation position information of the capacitance displacement meter 43 stored in advance, it is provided on the top plate 29 of the alignment stage for printing object 28 of the printing object table 14. The position of the X axis bar mirror 32 in the Y axis direction is detected, and the X axis bar mirror 32 is installed on the top plate 29 stored in advance. The real-time position of the print target 12 in the Y-axis direction held on the top plate 29 of the print target alignment stage 28 of the print target table 14 is based on information on the relative arrangement of the print target 12 and the location where the print target 12 is held. Is provided with a function of detecting.

  Furthermore, the controller 33a, when the printing target table 14 travels directly below the blanket roll 17 of the transfer mechanism section 16, causes the top plate of the printing target alignment stage 28 of the printing target table 14 as described above. When the X-axis direction position and Y-axis direction position of the print target 12 held on the head 29 and the angular orientation of the print target 12 with respect to the X-axis direction are detected in real time, the embodiment of FIGS. A function for sequentially obtaining a position correction amount and an angle correction amount with respect to the X-axis direction and the Y-axis direction of the printing object 12 held on the top plate 29 by the same processing as the controller 33, and the obtained position correction amount And a device for sequentially giving a correction command corresponding to the angle correction amount to the alignment drive mechanism 30 of the alignment stage 28 for the print target of the print target table 14. Are you as to comprise a.

  Other configurations are the same as those shown in FIGS. 1 to 5, and the same components are denoted by the same reference numerals.

  Even with the printing position error correction apparatus according to the present embodiment having the above-described configuration, when the printing operation is performed by the offset printing apparatus provided with the printing position error correction apparatus, the plate table 13 holding the inked plate 11 in advance. Is moved to the transfer mechanism section 16 and moved at a movement speed synchronized with the peripheral speed of the blanket roll 17 to be rolled, and the position immediately below the blanket roll 17 is along the rotation direction of the blanket roll 17 (left direction in FIG. 7). ) And the blanket roll 17 is brought into contact with the plate 11 held on the plate table 13 from above with a required printing pressure to perform a transfer (acceptance) step. Based on the signals input from 41b and the capacitance displacement meter 43, the controller 33a controls the plate alignment step of the plate table 13. The position of the plate 11 held on the top plate 24 of the die 23 in the X-axis direction and the Y-axis direction and the angular orientation of the plate 11 with respect to the X-axis direction are detected in real time, and this transfer (acceptance) During the process, the plate 11 that receives a printing pressure load from the rolling blanket roll 17 and the top plate 24 together with the top plate 24 are combined with one or more of the X-axis direction, the Y-axis direction, and the rotation direction. When the misalignment occurs, the misalignment is immediately corrected by the precise driving of the top plate 24 by the alignment driving mechanism 25 of the plate alignment stage 23, as in the embodiment of FIGS. . Therefore, it is possible to prevent the possibility of displacement in the printing pattern transferred (received) from the plate 11 to the blanket roll 17.

  After that, the printing target table 14 holding the printing target 12 is moved to the transfer mechanism unit 16, and the peripheral speed of the blanket roll 17 that rolls the printing target table 14 as in the case of the plate table 13. The position directly below the blanket roll 17 is moved in the direction along the rotational direction of the blanket roll 17 (left direction in FIG. 7) at the synchronized movement speed, and the print target 12 held on the print target table 14 is moved. When the blanket roll 17 is brought into contact with the required printing pressure from the upper side in the same phase as when the plate 11 is brought into contact, and a retransfer (printing) process is performed, the laser length measuring devices 42a, 42b and Based on the signal input from the capacitance displacement meter 43, the controller 33a causes the print target alignment stage 28 of the print target table 14 to move. The position of the printing object 12 held on the top plate 29 in the X-axis direction and the Y-axis direction and the angular orientation of the printing object 12 with respect to the X-axis direction are detected in real time. This retransfer (printing) step In the meantime, the print object 12 that receives a printing pressure load from the rolling blanket roll 17 is combined with the top plate 29 and is combined with one or more of the X-axis direction, the Y-axis direction, and the rotation direction. When the misalignment occurs, the misalignment is corrected by the precise drive of the top plate 29 by the alignment drive mechanism 30 of the alignment stage 28 for the printing object of the printing object table 14 as in the embodiment of FIGS. Will come to be. Therefore, it is possible to prevent the occurrence of positional deviation in the print pattern retransferred (printed) from the blanket roll 17 to the print target 12.

  Therefore, the present embodiment can provide the same effects as those of the embodiment of FIGS.

  The present invention is not limited only to the above-described embodiment, and a Y-axis bar mirror 26 and an X-axis bar mirror 27 are provided on the top plate 24 that holds the plate 11, and the top plate 24 is moved by the alignment drive mechanism 25. A plate alignment stage 23 that can be precisely driven in the X-axis direction, the Y-axis direction, and the rotation direction, and a Y-axis bar mirror 31 and an X-axis bar mirror 32 are provided on the top plate 29 that holds the printing target 12. The alignment drive mechanism 30 includes a print target alignment stage 28 that can be precisely driven in the X-axis direction and the Y-axis direction and in the rotation direction. The position immediately below the blanket roll 17 of the transfer mechanism 16 can be moved sequentially. If a manner, the respective alignment stage 23 and 28 for printing target for the plate may have a structure provided side by side in the X axis direction on a common moving table that travels below the blanket roll 17.

  The alignment drive mechanisms 25 and 30 in the alignment stages 23 and 28 for the printing plate and the printing target respectively rotate the top plates 24 and 29 holding the printing plate 11 and the printing target 12 in the X-axis direction and the Y-axis direction, and the rotation direction. As long as it can be driven precisely, a 3-axis or 4-axis drive unit (not shown) for driving the top plates 24, 29 may be provided with any type of drive unit.

  As an offset printing apparatus, an alignment area is provided at a required portion of the gantry 9 and the printing plate 11 held on the top plate 24 of the plate alignment stage 23 of the plate table 13 is started in the alignment area before starting the printing process. For the printing object 12 held on the top plate 29 of the printing object alignment stage 28 of the printing object table 14, the positions of the alignment marks provided in advance on the printing plate 11 and the printing object 12 are replaced with each other and the printing object 12. The positions of the plate 11 and the printing object 12 together with the top plate 24 are aligned by the alignment driving mechanisms 25 and 30 of the alignment stages 23 and 28 so that they are aligned with each other or aligned with the printing object 12 and the printing object 12. An offset in the form that will allow the initial alignment to be corrected It may be applied to a printing device. In this case, with the initial alignment of the plate 11 and the printing object 12, the relative position and angular orientation of the top plate 24 of the plate alignment stage 23 with respect to the plate table 13 in the X-axis direction and the Y-axis direction, In addition, the relative position and angular orientation of the top plate 29 of the printing target alignment stage 28 with respect to the printing target table 14 in the X axis direction and the Y axis direction will vary. Therefore, in the controllers 33 and 33a, the plate table 13 of the Y-axis bar mirror 26 and the X-axis bar mirror 27 provided on the top plate 24 of the plate alignment stage 23 immediately after the initial alignment of the plate 11 is taken. Are stored on the top plate 29 of the alignment stage for printing object 28 immediately after the initial alignment of the printing object 12 is taken. The relative positions and angular orientations of the Y-axis bar mirror 31 and the X-axis bar mirror 32 in the X-axis direction and the Y-axis direction with respect to the printing target table 14 are stored, and then the position of the plate 11 in the transfer (acceptance) step. When detecting the deviation, the controllers 33 and 33a detect the plate alignments detected in real time. The position and angle of the Y-axis bar mirror 26 and the X-axis bar mirror 27 on the top plate 24 of the page 23 in the X-axis direction and the Y-axis direction are determined in consideration of the position of the plate table 13 on the guide rail 10. What is necessary is just to make it detect by comparing with the relative arrangement | positioning with respect to the plate table 13 in the time immediately after taking the initial alignment of the memorize | stored plate 11. FIG.

  Further, when detecting the positional deviation of the printing object 12 in the retransfer (printing) step, the Y axis bar mirror on the top plate 29 of the printing object alignment stage 28 detected in real time by the controllers 33 and 33a. The initial alignment of the stored plate 11 is determined by taking into account the positions and angular orientations of the X axis direction and the Y axis direction of the 31 and the X axis bar mirror 32 in consideration of the position of the printing target table 14 on the guide rail 10. It may be detected by comparing with the relative arrangement with respect to the print target table 14 at the time immediately after.

  The offset printing apparatus to which the present invention is applied has a transfer mechanism as long as the blanket roll 17 can be brought into contact with the plate 11 and the printing object 12 moving immediately below with a required printing pressure. The present invention may be applied to any type of offset printing apparatus other than that illustrated in FIG. If the absolute position (coordinates) based on a required point in the X-axis direction of the plate table 13 or the printing target table 14 traveling along the guide rail 10 on the gantry 9 can be detected, The position detection means of each table 13, 14 may be applied to an offset printing apparatus provided with any type of position detection means other than a linear scale, such as a laser length measuring device.

  The printing object 12 of the offset printing apparatus may be other than the substrate.

  In the embodiment of FIG. 7, as a distance sensor for detecting the X-axis bar mirrors 27, 32 provided on the top plates 24, 29 of the alignment stages 23, 28 of the plate table 13 and the printing target table 14, respectively. Instead of the capacitive displacement meter 43, a laser length measuring device may be used.

  Further, in each embodiment, the Y-axis bar mirrors 26 and 31 and the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the plate table 13 and the printing target table 14 are used. For each of the distance sensors used to measure the distance in the X-axis direction or the Y-axis direction to each predetermined location, the distance from the respective installation location to the corresponding measurement target location is determined according to the plate 11 or the printing target. As long as it is possible to measure with a resolution finer than the amount of minute misalignment desired to be corrected for 12, any type of distance sensor other than a capacitive displacement meter or laser length measuring device can be used. You may make it use.

  The Y-axis bar mirrors 26 and 31 and the X-axis bar mirrors 27 and 32 provided on the top plates 24 and 29 of the alignment stages 23 and 28 of the plate table 13 and the printing target table 14 are respectively connected to the plate table 13 and the printing target table 14. If a predetermined position can be detected by a corresponding distance sensor when the vehicle travels directly under the blanket roll 17, the arrangement and size on the top plates 24 and 29 are appropriately determined. It may be changed. Furthermore, you may make it attach to the side surface and lower surface of each said top plate 24,29.

  Furthermore, the present invention provides a printing apparatus of a type that performs printing processing by bringing a plate cylinder as a printing roll into contact with a printing object held on an alignment stage provided on a moving table running below the printing roll with a required printing pressure. Thus, the present invention can also be applied to the case of correcting a slight misalignment that occurs in a printing object that receives the printing pressure load.

  Of course, various modifications can be made without departing from the scope of the present invention.

10 Guide Rail 11 Plate 12 Print Target 13 Plate Table 14 Print Target Table 17 Blanket Roll 23 Plate Alignment Stage 24 Top Plate 26 Y Axis Bar Mirror 27 X Axis Bar Mirror 28 Print Target Alignment Stage 29 Top Plate 31 Y Axis Bar Mirror 32 X Axis Bar mirror 33, 33a Controller 34 Laser length measuring device (distance sensor)
35 Laser length measuring device (distance sensor)
36a, 36b Capacitive displacement meter (distance sensor)
37 Laser length measuring device (distance sensor)
38 Laser length measuring device (distance sensor)
41a, 41b Laser length measuring device (distance sensor)
42a, 42b Laser length measuring device (distance sensor)
43 Capacitive displacement meter (distance sensor)

Claims (5)

  A plate alignment stage comprising a top plate that can be precisely driven in two orthogonal directions and a rotational direction on a plane is provided on the plate table and travels directly under the blanket roll along the guide rail. The plate position held on the top plate of the plate alignment stage is detected when the transfer process is performed by bringing the blanket roll into contact with the plate held on the top plate at the required printing pressure from above. The plate position and angle posture are corrected together with the top plate by the plate alignment stage so that the detected plate position and angle posture coincide with a predetermined target position and angle posture. Alignment step for printing objects, which has a top plate that can be driven precisely in two orthogonal directions and in the rotational direction. Is placed on the table to be printed, runs directly under the blanket roll along the guide rail, and the blanket roll is brought into contact with the printing target held on the top plate of the alignment stage for the printing target from above with the required printing pressure. When the retransfer process is performed, the position and angular orientation of the printing target held on the top plate of the alignment stage for printing target are detected, and the detected position and angular orientation of the printing target are determined to be a predetermined target position and A printing position error correction method, wherein the position and angle orientation of a printing object are corrected together with the top plate by the printing object alignment stage so as to coincide with the angle orientation.   The required position and angle of the plate held on the top plate of the plate alignment stage are determined as the required distance in the longitudinal direction of one of the X-axis bar mirror and the Y-axis bar mirror provided on the top plate of the plate alignment stage. And the relative positions of the positions detected at one of the two bar mirrors and one of the other bar mirrors, and the positions where the X-axis bar mirror and Y-axis bar mirror are installed on the top plate of the plate alignment stage and the plate holding position. An X-axis bar mirror and a Y-axis bar mirror provided on the top plate of the alignment stage for the printing object, so that the position and angle orientation of the printing object held on the top plate of the alignment stage for the printing object are detected based on the information Of the required distance in the longitudinal direction of one of the bar mirrors Information on the position detected for one of the other bar mirrors and information on the relative arrangement of the X-axis bar mirror and Y-axis bar mirror installation positions on the top plate of the print target alignment stage and the print target holding position The printing position error correction method according to claim 1, wherein the detection is performed based on the detection result.   On the plate table that runs along the guide rails arranged below the blanket roll, a plate alignment stage is provided that has a top plate that can be precisely driven in two orthogonal directions and a rotational direction on the plane, The plate can be held on the top plate of the plate alignment stage, and the top plate can be precisely driven in two orthogonal directions on the plane and in the rotational direction on the table to be printed that runs along the guide rail. An alignment stage for a printing object is provided so that the printing object can be held on the top plate of the alignment stage for the printing object, and a plate table that runs directly under the blanket roll is provided via a plate alignment stage. Means for detecting the position and angular orientation of the held plate, and the blanket Means for detecting the position and angle orientation of the printing object held on the printing object table that runs directly under the trawl via the alignment stage for printing object, and the plate table directly below the blanket roll. A function for giving a position and angle correction command for matching the position and angle orientation of the plate detected when traveling with a predetermined target position and angle orientation to the plate alignment stage of the plate table, and the printing A position and angle correction command for matching the position and angle orientation of the print target detected when the target table travels directly below the blanket roll with a predetermined target position and angle posture is output from the print target table. It has a configuration comprising a controller having a function of giving to an alignment stage for printing objects. Printing position error correcting device to.   An X-axis bar mirror and a Y-axis bar mirror are provided on the top plate of the plate alignment stage as means for detecting the position and angle orientation of the plate held on the plate table running directly under the blanket roll via the plate alignment stage. In addition, the distance between the two required distances in the longitudinal direction of one of the bar mirrors provided on the top plate of the plate alignment stage and one of the other bar mirrors is determined in the longitudinal direction of each bar mirror. As a means for detecting a position and an angle orientation of a print object that is provided with a distance sensor for measuring from a direction orthogonal to the print object and that is held via a print object alignment stage on a print object table that runs directly under the blanket roll, Top printing of alignment stage for printing The X-axis bar mirror and the Y-axis bar mirror are provided on the top plate, and two bar mirrors in the longitudinal direction of any one of the bar mirrors provided on the top plate of the alignment stage for printing and the other bar mirror 4. The printing position error correction apparatus according to claim 3, further comprising a distance sensor for measuring a distance to one place from a direction orthogonal to the longitudinal direction of each bar mirror.   Each X-axis bar mirror and each Y-axis bar mirror provided on each top plate of the plate alignment stage and the alignment stage for printing are arranged so as to be along the longitudinal direction of the guide rail and the direction orthogonal thereto, and the position directly below the blanket roll A distance sensor is provided inward in the vicinity of one side of the guide rail and inward along a direction orthogonal to the longitudinal direction of the guide rail, and the distance sensor travels directly under the blanket roll. The distance to the X-axis bar mirror provided on the top plate of the plate alignment stage on the plate table and the X-axis bar mirror provided on the top plate of the alignment stage for printing on the printing target table that runs directly under the blanket roll. The distance according to claim 4 can be measured together. Printing position error correction device.

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