JP2011011499A - Printing pressure measuring method of printing equipment and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing pressure measuring method of printing equipment which can upgrade measurement precision.SOLUTION: A measurement structure 8 which reveals an already-known correlation between the magnitude of a compressive load and the level of the strain of a strain deformation in a vertical direction is interposed between a roll retaining frame 6 which retains a printing roll 5 at the pressing side arranged above a lower roll 9 and a jack 7 serving as a roll pressing mechanism. In addition, the measurement structure 8 is equipped with a strain sensor 14 and a measuring apparatus 16 is connected with the output side of the strain sensor 14 through an amplifier 15 to form the printing pressure measuring device for printing equipment. In the measuring method, the printing roll 5 at the pressing side which is made to descend by means of a jack 7 is brought into contact with the upper side of the lower roll 9, then the load applied by the own weight of the printing roll at the pressing side is received and supported by the lower roll 9. After that, printing pressure is generated by pressing the printing roll 5 at the pressing side to the lower roll 9 by the jack 7. In this case, the generated printing pressure is measured by the measuring apparatus 16 based on a correlation between the strain level of the strain deformation generated in the measurement structure 8 and the compressive load and strain deformation at the measurement structure 8.

Description

  The present invention provides the above pressing when a printing roll such as an impression cylinder, a plate cylinder, a blanket cylinder or the like in a printing apparatus is brought into contact with a required pressing object so as to be pressed from above with a required printing pressure. The present invention relates to a printing pressure measuring method and apparatus for a printing apparatus used for measuring the printing pressure of the printing roll on the side against the required pressing object.

  One type of printing apparatus is a type in which printing is performed by directly contacting a plate surface with a surface to be printed (printing surface) such as printing paper. The plate cylinder is brought into close contact with the printing surface of the printing target by rotating together with the printing cylinder sandwiched between the printing cylinder positioned on the printing surface side of the printing target and the impression cylinder positioned on the non-printing surface side. Thus, the printing pattern provided on the plate cylinder is printed on the printing object.

  When performing the printing process in the rotary printing press, in order to increase the printing accuracy, appropriately control the printing pressure when the plate cylinder is brought into contact with the impression cylinder through the printing object. is important. That is, when a difference occurs in the printing pressure distribution, a shearing force is generated, and this shearing force causes a printing deviation. Therefore, it is important to control the printing pressure appropriately. It is necessary to measure the printing pressure with the rotary printing press.

  As another type of printing apparatus, a blanket cylinder is brought into contact with a plate surface of a plate cylinder or a plate-like plate, and ink is once transferred (received) from the plate surface to the surface of the blanket cylinder. The cylinder is brought into contact with a printing surface of a printing object such as a flat printing object or a printing paper sandwiched between the blanket cylinder and an impression cylinder, whereby ink on the surface of the blanket cylinder is applied to the printing object. There is an offset printing machine that performs printing by retransferring (printing) on a printing surface.

  In such an offset printing machine, as in the case of the above-described rotary printing machine, it is possible to prevent the occurrence of shearing force due to the difference in printing pressure distribution from causing printing deviation and to increase printing accuracy. The blanket cylinder is brought into contact with the printing plate so as to come into contact with the printing plate, and the printing pressure from the printing plate to the blanket cylinder (acceptance) is processed. It is important to appropriately control the printing pressure when the blanket cylinder is contacted so as to be pressed and the retransfer (printing) process from the blanket cylinder to the printing object is performed. It is also necessary to measure the printing pressure in an offset printing machine.

  FIG. 7 shows an outline of a printing pressure measurement method in a gravure rotary printing press as an example of a printing pressure measurement method of a conventional printing apparatus, and an impression cylinder b is placed on the upper side of a plate cylinder a that is rotatably placed horizontally. A bearing (not shown) that is arranged in parallel and rotatably supports the shaft of the impression cylinder b is held by a frame of a printing unit (not shown) so as to be movable in the vertical direction, and an air cylinder c is provided above each bearing. Attached to each of the air cylinders c, the pressure cylinder b can be driven up and down, and a bearing (not shown) that rotatably supports the shaft of the plate cylinder a is attached to the frame or base plate via an individual load cell d. It is configured to be supported by a fixed portion e of a printing machine or the like.

  According to such a configuration, the printing cylinder (not shown) is interposed between the impression cylinder b serving as the pressing-side printing roll and the plate cylinder a serving as the pressing object by the extension operation of the air cylinders c. When the printing process is performed in a state in which the printing pressure is applied while closely contacting from above, a bearing (not shown) of the plate cylinder a that is pressed downward by the printing pressure from the pressure cylinder b is supported. It is said that the printing pressure can be measured based on the detection signal of each load cell d (see, for example, Patent Document 1).

  In an offset printing press, when the blanket cylinder is brought into contact with a plate or a printing object, the crushing allowance of the resin body (blanket) provided on the surface of the blanket cylinder is measured and the dimensional change is marked. Often referred to as pressure.

  By the way, in recent years, electronic circuits such as a liquid crystal display have been printed on a substrate using a printing technique using a conductive paste as a printing ink, for example, an intaglio offset printing technique, instead of fine processing such as etching of a metal deposition film. The method of forming is proposed.

  When an electronic circuit such as the liquid crystal display is formed on a substrate, a fine line width of about 10 μm, for example, may be required as an electrode line width. In addition, a plurality of electronic circuits may be formed on the substrate in a superimposed manner. In this case, the overprinting of the electronic circuits is performed by replacing the plate. However, if the printing position is shifted, the entire configuration of the electronic circuits is destroyed. Therefore, although the accuracy differs somewhat depending on the object, in the case of a precise electronic circuit in which the line width is about 10 μm, it may be necessary to suppress the overlay deviation to several μm.

  For this reason, when an electronic circuit is formed on the substrate by printing, high printing accuracy is required as compared with normal offset printing for printing characters and images on paper or the like. It is necessary to control and adjust the printing pressure with high accuracy. Therefore, it is required to measure the printing pressure with high accuracy.

JP 2003-205600 A

  However, in the printing pressure measurement method disclosed in Patent Document 1, a load due to the weight of the plate cylinder a acts in an initial state on each load cell d provided for measuring printing pressure. When measuring the printing pressure generated by bringing the impression cylinder b into contact with the plate cylinder a, the load cell d is placed on the plate cylinder a in addition to its own weight. Since the applied printing pressure is measured after receiving the load due to the weight of the mounted impression cylinder b, each load cell d includes the own weight of the plate cylinder a and the own weight of the impression cylinder b. It is necessary to use a load having a measurement range corresponding to a heavy load consisting of the load due to and the printing pressure.

  Therefore, when the printing pressure required for carrying out the printing process is smaller (lighter) than the load due to the weight of the plate cylinder a or the impression cylinder b, the measurement is performed among the entire loads detected by the load cells d. Since the load due to the weight of the plate cylinder a and the impression cylinder b other than the target printing pressure occupies a large part, the actual measurement range of the load cell d is used for the measurement of the printing pressure. As a result, the measurement accuracy of the printing pressure is reduced (deteriorated).

  In addition, the method of measuring the crushing margin of the resin body (blanket) of the blanket cylinder and using the dimensional change as the printing pressure with an offset printing machine does not measure the printing pressure as the pressure (load). The printing pressure as a load cannot be measured with high accuracy.

  However, even with the conventional printing pressure measurement method described above, the measurement of the printing pressure required to perform control adjustment of the printing pressure when performing general printing processing for printing characters or images on paper or the like. Since the accuracy is sufficient, the idea of further improving the measurement accuracy of printing pressure has not been proposed in the past. Therefore, in the conventional printing pressure measurement method, for example, a very high accuracy required when performing precision printing such as printing a thin line having a line width of about 10 μm as in the case of forming an electronic circuit by printing. It is difficult to perform high-precision printing pressure measurement that satisfies printing pressure measurement accuracy for performing control adjustment of printing pressure.

  In view of this, the present invention provides a printing-side printing roll such as an impression cylinder, a plate cylinder, a blanket cylinder, etc. in a printing apparatus to another printing roll, a flat plate or a required pressing object such as a printing object from above. It is possible to measure the printing pressure with high accuracy when performing the printing process in a state in which the printing pressure is applied while being pressed and contacted, so that the control adjustment of the printing pressure can be performed with higher accuracy. It is an object of the present invention to provide a printing pressure measuring method and apparatus for a printing apparatus that can be made advantageous to perform precision printing.

  In order to solve the above-mentioned problem, the present invention provides a pressing-side printing roll disposed on the upper side of the pressing object by applying a downward pressing force by a roll pressing mechanism, corresponding to claim 1, and the pressing side When the printing roll is brought into contact with the pressing object with a required printing pressure, deformation that occurs in the measurement structure provided between the roll pressing mechanism and the pressing printing roll is provided. Based on the correlation between the deformation amount of the measurement structure detected by the deformation detection means and the load and deformation amount of the measurement structure detected by the deformation detection means, the pressing-side printing roll A printing pressure measurement method for a printing apparatus that measures the printing pressure on a pressing object.

  In the above configuration, a measurement structure having a known correlation between the compressive load in the vertical direction and the strain amount of the strain deformation compressed in the vertical direction is used as the measurement structure, and the measurement is performed as the deformation detection unit. A strain sensor capable of detecting a strain amount of strain deformation generated in the structural body is used.

  Similarly, in the above configuration, a measurement structure having a known correlation between the vertical compressive load and the amount of elastic deformation in the vertical direction at a required location is used as the measurement structure. A minute amount for detecting a deformation amount of the elastic deformation in the direction close to the pressing-side printing roll at the required location in the measurement structure as a change in distance to the required location whose relative position is fixed with respect to the pressing-side printing roll. Use a distance sensor.

  According to a fourth aspect of the present invention, for measurement, a pressing-side printing roll disposed above the pressing object and a roll pressing mechanism for applying a downward pressing force to the pressing-side printing roll. The pressing device provided with a deformation detecting means for detecting deformation generated in the measuring structure and a measuring instrument, and the measuring instrument is provided with a downward pressing force by the roll pressing mechanism. A detection signal of the deformation amount of the measurement structure input from the deformation detection means when the side printing roll is brought into contact with the pressing object, and the load and deformation amount of the measurement structure Based on this known correlation, a printing pressure measuring device of a printing apparatus having a configuration provided with a function of measuring a printing pressure with respect to a pressing object of the pressing side printing roll is provided.

  Furthermore, in the above configuration, the measurement structure is a measurement structure having a known correlation between the compressive load in the vertical direction and the strain amount of the strain deformation compressed in the vertical direction, and the deformation detection means is the measurement unit. The strain sensor is configured to detect a strain amount of strain deformation generated in the structural body.

  Similarly, in the above configuration, the measurement structure is a measurement structure having a known correlation between the compression load in the vertical direction and the amount of elastic deformation in the vertical direction at the required location, and the deformation detection means is the above In order to detect the deformation amount of the elastic deformation in the direction close to the pressing-side printing roll at the required location in the measurement structure as a change in distance to the required location whose relative position is fixed with respect to the pressing-side printing roll. It is set as the structure as a very small distance sensor.

According to the present invention, the following excellent effects are exhibited.
(1) When a pressing force is applied downward to a pressing-side printing roll arranged above the pressing object by a roll pressing mechanism, and the pressing-side printing roll is brought into contact with the pressing object with a required printing pressure. Further, the deformation detection means detects a deformation occurring in the measurement structure provided between the roll pressing mechanism and the pressing-side printing roll, and the measurement detected by the deformation detection means. A printing pressure measuring method of a printing apparatus for measuring a printing pressure on a pressing object of the pressing side printing roll based on a correlation between a deformation amount of the structural body and a load and a deformation amount of the measuring structure; Therefore, when the printing pressure is generated by pressing the pressing side printing roll against the pressing object by the roll pressing mechanism, the roll pressing mechanism is supported after the weight of the pressing side printing roll is supported by the pressing object. The printing pressure is measured based on the amount of deformation generated in the measuring structure when a vertical compressive load is applied to the measuring structure provided between the attaching mechanism and the pressing-side printing roll. be able to.
(2) Since the deformation amount due to the compressive load in the vertical direction of the measurement structure that is the basis of the measurement of the printing pressure is not affected by the weight of the pressing-side printing roll, Based on the amount of deformation due to the compressive load in the direction, it is possible to accurately measure a printing pressure smaller than the load due to the weight of the pressing-side printing roll or pressing object.
(3) Therefore, by controlling the roll pressing mechanism of the pressing side printing roll based on the measured value of the printing pressure measured by the measuring instrument, the pressing object of the pressing side printing roll. Therefore, it is possible to precisely control and adjust the printing pressure with respect to the ink. Therefore, it is possible to suppress the generation of shearing force due to the difference in the printing pressure distribution, and it is possible to prevent printing deviation and increase printing accuracy. As a result, as in the case where the electronic circuit is formed by printing, for example, it can be advantageous for implementation of precision printing such as printing a thin line having a line width of about 10 μm.
(4) Moreover, the measurement range of the printing pressure can be greatly changed by replacing the measurement structure with a measurement structure having a different correlation between the compressive load in the vertical direction and the deformation amount.
(5) A measurement structure having a known correlation between the compressive load in the vertical direction and the strain amount of the strain deformation compressed in the vertical direction is used as the measurement structure, and the measurement structure is used as the deformation detection unit. Of a strain sensor capable of detecting the strain amount of strain deformation occurring in the structure, or as a measurement structure, the correlation between the compressive load in the vertical direction and the deformation amount of the elastic deformation in the vertical direction at the required location A measurement structure having a known relationship is used, and deformation amount of elastic deformation in a direction close to the pressing-side printing roll at the required location in the measuring structure is applied to the pressing-side printing roll as deformation detection means. On the other hand, a configuration in which a minute distance sensor that detects a change in distance with respect to a required portion whose relative position is fixed is used, so that the printing apparatus having the effects (1), (2), (3), and (4) can be realized. How to measure printing pressure And it is possible to easily realize a device.

1 is a schematic front view illustrating an embodiment of a printing pressure measurement method and apparatus for a printing apparatus according to the present invention. It is a side view which expands and shows the principal part in the printing pressure measuring apparatus of FIG. It is a perspective view which expands and shows an example of the structure for a measurement of the printing pressure measuring apparatus of FIG. It is a perspective view which shows another example of the structure for a measurement of the printing pressure measuring apparatus of FIG. It is a schematic front view which shows the other form of implementation of this invention. FIG. 5 is an enlarged view of a main part of the printing pressure measurement apparatus of FIG. 5, (a) is a side view, and (b) is an enlarged view of a part of the measurement structure of (a). It is a figure which shows the outline | summary of the printing pressure measurement method in a gravure rotary printing press as an example of the printing pressure measurement method of the conventional printing apparatus.

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

  1 to 3 show an embodiment of a printing pressure measuring method and apparatus for a printing apparatus according to the present invention, and a pressing side printing roll such as a plate cylinder and a lower roll as a pressing object such as an impression cylinder are provided. An example of application to a type of rotary printing press is shown as follows.

  That is, a gate-shaped frame comprising a pair of left and right columns 3 extending in the vertical direction and a beam member 4 extending in the horizontal direction and connecting the upper ends of the columns 3 at a required location on the gantry 1 of the printing apparatus. 2 is provided.

  A pressing-side printing roll 5 such as a plate cylinder extending in the horizontal direction is rotatably held by a roll holding frame 6 via the rotation shafts at both ends thereof, and the roll holding frame 6 is disposed inside the portal frame 2. And is attached to each column 3 of the portal frame 2 so as to be vertically movable via a vertical linear guide mechanism (not shown).

  Further, in the beam member 4 of the portal frame 2, as a roll pressing mechanism, at positions above the both longitudinal ends of the roll holding frame 6 corresponding to both axial ends of the pressing-side printing roll 5. The jacks 7 are respectively installed downward, and the lower end portions of the operation rods 7 a of the respective jacks 7 are connected to the upper sides of both end portions in the longitudinal direction of the roll holding frame 6 through the measurement structures 8.

  At a position directly below the pressing-side printing roll 5, for example, a lower roll 9 such as an impression cylinder is arranged in parallel as an object to be pressed, and the rotation shafts at both ends in the axial direction are placed on the gantry 1. The bracket 10 provided is rotatably supported. As a result, in a state where the operating rods 7a of the jacks 7 are contracted, the pressing-side printing roll 5 and the lower roll 9 are integrated with the roll holding frame 6 via the measuring structures 8. When the printing paper (not shown) as a printing object to be placed between the pressing-side printing roll 5 and the lower roll 9 is lifted to a position that is further apart above the required dimension, the pressing-side printing roll The printing process can be stopped so that the printing process can be stopped.

  On the other hand, when the operation rod 7a of each jack 7 is extended and operated, the pressing-side printing roll 5 is integrated with the roll holding frame 6 via the measurement structures 8, and the upper side of the lower roll, The printing paper (not shown) as the printing object can be lowered to a position where it is in contact with the printing paper, and from this state, by further extending the operation rod 7a of each jack 7, A downward pressing force is applied to the pressing-side printing roll 5 via the measuring structure 8 and the roll holding frame 6 by the extension operating force of the jacks 7, and the pressing force biases downward. The pressing-side printing roll 5 is pressed against the lower roll 9 so that printing pressure can be generated.

  Each of the measurement structures 8 has an accurate dimension, in particular, a horizontal cross-sectional area at a required portion serving as a load transmission path for transmitting the force applied from the jacks 7 to the roll holding frame 6 in the vertical direction. It is assumed that the configuration is understood.

  Specifically, for example, as shown in FIG. 3, each of the measurement structures 8 can be detachably attached to the distal end portion of the operating rod 7a of the jack 7 (see FIGS. 1 and 2). The ring-shaped upper end side mounting portion 11 is arranged at a plurality of required intervals in the circumferential direction, for example, two locations at intervals of 180 degrees in the circumferential direction, and individually arranged below the respective locations, and the roll holding frame 6 (FIG. 1). , See FIG. 2), and a flat plate-like lower end side attachment portion 12 that can be removably attached to each other by two columnar portions 13 extending vertically with a certain horizontal cross-sectional area. The configuration is as follows. As a result, the driving force generated by the expansion / contraction operation of the jacks 7 is applied to the roll holding frame 6 via the upper end side attachment portions 11, the columnar portions 13, and the lower end side attachment portions 12 of the corresponding measurement structures 8. Can be communicated to. Furthermore, by making each of the columnar portions 13 have a certain horizontal cross-sectional area, the magnitude of the load acting in the vertical direction on each columnar portion 13 and the amount of strain of the vertical strain deformation caused by the load can be reduced. So that the relationship can be accurately converted. Therefore, when a force acts between each jack 7 and each roll holding frame 6 via each measurement structure 8, the magnitude of the acting force and each column shape of each measurement structure 8. A correlation is obtained between the amount of distortion of the vertical strain deformation occurring in the portion 13.

  On the side surface of one of the two columnar portions 13 in each of the measurement structures 8, the amount of deformation (deformation amount) of the strain deformation occurring in the corresponding columnar portion 13 is detected to detect the potential or Each strain sensor 14 for converting to electric charge is attached, and each strain sensor 14 is connected to a measuring instrument 16 via an amplifier 15 such as a charge amplifier, so that the strain of the columnar portion 13 corresponding to each strain sensor 14 is connected. The potential or charge output according to the amount of distortion of the deformation is amplified by the amplifier 15 to be input to the measuring instrument 16 as a voltage.

  The measuring instrument 16 correlates the distortion amount of distortion generated in each columnar portion 13 obtained by calibration in advance with the voltage input from the amplifier 15, for example, the distortion amount and the voltage conversion coefficient. It is a configuration provided in the form. Further, the measuring device 16 is configured to apply a vertical load acting on the columnar portion 13 of the measurement structure 8 whose horizontal cross-sectional area is known based on actual measurement or numerical calculation by FEM or the like, and to the columnar portion 13. Data regarding the correlation with the strain amount of the generated strain deformation is obtained, and for example, it is provided as a function or the like that can calculate the load using the strain amount as a variable. As a result, the potential or charge output according to the amount of strain of the corresponding columnar portion 13 from each strain sensor 14 attached to each columnar portion 13 of each measurement structure 8 is amplified by the amplifier 15 to become a voltage. When the measured signal is input to the measuring instrument 16, the measuring instrument 16 corresponds to the voltage input from the amplifier 15 to each of the measuring structures 8 based on the distortion amount and the voltage conversion coefficient. Is converted into the strain amount of the strain deformation of the columnar portion 13, and based on the correlation between the vertical load acting on the columnar portion 13 and the strain amount of the strain deformation from the strain amount obtained by the conversion, The magnitude of the load acting on each columnar portion 13 to which each strain sensor 14 is attached is calculated, and the vertical direction acting on the entire measurement structure 8 having each columnar portion 13 is calculated. The load can be obtained.

  The strain sensors 14 are preferably of the crystal vibration type from the viewpoint of sensing a minute strain deformation displacement of the columnar portions 13 of the measurement structures 8. However, as described above, by converting the strain amount of strain deformation generated in each columnar portion 13 of each measurement structure 8 by the measuring instrument 16 into a load, each columnar portion of each measurement structure 8 is converted to a load. The accuracy when calculating the load in the vertical direction acting on 13 is an accuracy corresponding to the printing pressure measurement accuracy required when deriving the printing pressure on the lower roll 9 of the pressing-side printing roll 5. Any type of strain sensor 14 other than the crystal vibration type may be used.

  In the printing apparatus equipped with the printing pressure measuring device of the printing apparatus according to the present invention having the above-described configuration, the pressing rod printing roll held by the roll holding frame 6 by contracting the operation rod 7a of each jack 7 is held. 5 is pulled up to a position above the lower roll 9 and separated from the lower roll 9 by a required dimension, and when the printing process is stopped, it is interposed between the jacks 7 and the roll holding frame 6. Each of the measurement structures 8 has its own weight of the roll holding frame 6 and the pressing-side printing roll 5 supported so as to be suspended below the measurement structures 8 in the vertical direction. Acts as a tensile load. For this reason, strain deformation in the extending direction occurs in each columnar portion 13 of each measurement structure 8, and the strain amount of strain deformation in the extending direction generated in each columnar portion 13 is detected by each strain sensor 14. Thus, in the measuring instrument 16, if the printing pressure load described later is a positive value, the weight of the roll holding frame 6 and the pressing-side printing roll 5 acting on the measuring structures 8 is measured. The load is detected as a negative value.

  In this state, the actuating rod 7a of each jack 7 is extended to lower the pressing side printing roll 5 held on the roll holding frame 6, and the pressing side printing roll 5 that is lowered is moved to the lower roll 9. When the printing paper (not shown) is interposed on the upper side, the weight of the roll holding frame 6 and the pressing-side printing roll 5 suspended by the jacks 7 via the measurement structures 8 is determined. However, since the lower roll 9 is received, the tensile load in the vertical direction due to the weight of the roll holding frame 6 and the pressing printing roll 5 acting on each measurement structure 8 is reduced. Thus, the strain deformation in the extending direction generated in each columnar portion 13 of each measurement structure 8 gradually decreases, and the roll holding frame 6 and the extension operation of each jack 7 At the time when all the weight of the attached printing roll 5 is received and supported by the lower roll 9, the vertical tensile load acting on each measurement structure 8 becomes zero. Since the strain deformation in the extending direction of each columnar portion 13 of each measurement structure 8 is eliminated, the potential or charge output from each strain sensor 14 is input as a voltage amplified by the amplifier 15. The load detected by the measuring instrument 16 is zero.

  Thereafter, the operating rods 7a of the jacks 7 are further extended so that the pressing-side printing roll 5 that is in contact with the lower roll 9 via a printing paper (not shown) is moved downward together with the roll holding frame 6. When pressed, the pressing-side printing roll 5 is pressed against the lower roll 9 by a downward pressing force to generate a printing pressure.

  At this time, each measuring structure 8 provided between each jack 7 and the roll holding frame 6 has a printing pressure applied to the lower roll 9 from the pressing-side printing roll 5. The reaction force acts as a compressive load in the vertical direction via the pressing-side printing roll 5 and the roll holding frame 6. For this reason, each columnar portion 13 of each measurement structure 8 undergoes strain deformation in the direction compressed from the upper and lower sides, and the amount of strain deformation in the compression direction generated in each columnar portion 13 is the amount of each strain sensor. 14, since the load due to the reaction force of the printing pressure acting on each measurement structure 8 is detected as a positive value in the measuring instrument 16, the reaction of the printing pressure is detected. As a value equal to the force, the load of the printing pressure can be measured as a positive value.

  As described above, according to the printing pressure measuring method and apparatus of the printing apparatus of the present invention, the pressing-side printing roll 5 is caused to intervene the lower roll 9 with the printing paper (not shown) to be printed by the operation of each jack 7. When the printing pressure is generated by pressing in the state, the columnar portions 13 of the measurement structure 8 provided between the jacks 7 and the roll holding frame 6 holding the pressing-side printing roll 5 The printing pressure can be measured on the basis of the amount of distortion of the deformation in the compression direction.

  Further, when the printing pressure is measured, the deformation in the compression direction of each columnar portion 13 of each measurement structure 8 that is the basis of the measurement of the printing pressure is caused by the weight of the pressing-side printing roll 5 and Since it is not affected by the weight of the lower roll 9, it is smaller (lighter) than the load due to the weight of the pressing-side printing roll 5 or the lower roll 9 based on the amount of strain deformation in the compression direction of each columnar section 13. ) Printing pressure can be accurately measured.

  Therefore, as shown by a two-dot chain line in FIG. 2, a jack that gives a control command to the jack 7 serving as a roll pressing mechanism of the pressing-side printing roll 5 based on the measured value of the printing pressure input from the measuring device 16. By adopting a configuration in which the control device 17 is provided, the printing pressure can be controlled and adjusted with respect to the lower roll 9 of the pressing-side printing roll 5 more accurately than in the prior art, so that the printing accuracy is increased. Thus, as in the case where the electronic circuit is formed by printing, for example, it can be advantageous for the implementation of precision printing such as printing a thin line having a line width of about 10 μm.

  In addition, the amplifier 15 that amplifies the potential or electric charge that is output according to the strain amount of the strain deformation of the corresponding columnar portion 13 from the respective strain sensor 14 provided in each columnar portion 13 of each measurement structure 8. By changing the amplification factor, the measurement range of the printing pressure in the measuring instrument 16 can be easily changed.

  Further, each of the measuring structures 8 interposed between the jacks 7 and the roll holding frame 6 is more horizontally cut than the measuring structure 8 shown in FIG. By changing to a measurement structure having a different area, for example, a measurement structure 8 having a smaller horizontal cross-sectional area of the columnar section 13 as shown in FIG. 4, the pressing-side printing roll 5 and the lower roll 9 Even when the printing pressure generated in the meantime is smaller (lighter), the strain sensor 14 can detect the amount of strain deformation in the compression direction generated in each columnar portion 13 of the measurement structure 8 by the printing pressure. It is possible to appropriately adjust the amount of distortion.

  On the other hand, although not shown, the pressing-side printing roll 5 can be replaced with the measuring structure 8 whose horizontal cross-sectional area of the columnar portion 13 is larger than that of the measuring structure 8 shown in FIG. Even when the printing pressure generated between the lower roll 9 is larger (heavy), the amount of strain of the strain deformation in the compression direction generated in each columnar portion 13 of the measurement structure 8 by the printing pressure is It is possible to appropriately adjust the amount of strain detectable by the strain sensor 14.

  Accordingly, the measurement structure 8 interposed between the jacks 7 and the roll holding frame 6 is appropriately replaced with one having a different horizontal cross-sectional area of the columnar portion 13 to measure the printing pressure. The range can be changed greatly.

  Next, FIGS. 5 and 6 (a) and 6 (b) show another embodiment of the present invention. In the same configuration as shown in FIGS. 1 to 3, each jack 7 and pressing side printing roll are shown. Between the roll holding frame 6 holding 5, measurement structures 8 each including a columnar portion 13 having a predetermined horizontal cross-sectional area that causes distortion deformation according to the magnitude of the force acting in the vertical direction are respectively interposed. And measuring the printing pressure on the lower roll 9 of the pressing-side printing roll 5 on the basis of the strain amount of the distortion in the compressive direction generated in the columnar portion 13 of each measurement structure 8. Instead of the configuration, elastic deformation is caused in the vertical direction between each jack 7 and the roll holding frame 6 holding the pressing-side printing roll 5 according to the magnitude of the force acting in the vertical direction. As a configuration comprising the measurement structures 18 respectively, Based on the vertical direction of the elastic deformation caused in use structure 18, in which so as to measure the printing pressure for the lower roll 9 of the pressing-side printing roll 5.

  More specifically, the measurement structure 18 includes two leg portions 19 extending in the vertical direction and having a predetermined dimension in parallel with a predetermined interval therebetween, and the upper end portions of the leg portions 19 are arranged as horizontal beam portions. 20, and a notch 21 having a required depth from both the upper and lower surfaces is provided at two locations near each leg portion 19 near both ends in the longitudinal direction of the beam portion 20. The center part of the beam part 20 located between the notch 21 forming parts is configured as an elastic hinge part 22 that can be elastically deformed only in the vertical direction, and at the tip part of the operating rod 7a of each jack 7, The elastic hinges 22 of the individual measurement structures 18 are detachably attached, and the lower ends of the legs 19 of the measurement structures 18 are detachably attached to the roll holding frame 6. .

  Further, a minute distance sensor 23 is attached to the side surface of the elastic hinge portion 22 of each measurement structure 18 downward, that is, toward the roll holding frame 6. Thereby, when each elastic hinge part 22 of each said structure 18 for measurement receives the load of an up-down direction, the deformation | transformation of the elastic deformation to the said up-down direction which arises in each said elastic hinge part 22 according to the magnitude | size of this load The amount (deformation allowance) can be detected as a change in the distance from the roll holding frame 6 by the corresponding minute distance sensor 23.

  Each minute distance sensor 23 provided in each measurement structure 18 is connected to a measuring instrument 25 via an amplifier 24, and corresponds to the amount of deformation of the elastic hinge portion 22 of each measurement structure 18 respectively. A signal output from each of the minute distance sensors 23 is amplified by the amplifier 24 to be input to the measuring instrument 25 as a voltage.

  The measuring instrument 25 correlates the amount of deformation of the elastic hinge portion 22 of each measurement structure 18 detected by each minute distance sensor 23 obtained in advance by calibration and the voltage input from the amplifier 24. For example, in the form of deformation and voltage conversion coefficients. Further, the measuring instrument 25 is generated in the elastic hinge portion 22 and the magnitude of the vertical load acting on the elastic hinge portion 22 of each measurement structure 18 based on actual measurement or numerical calculation by FEM or the like in advance. Regarding the correlation with the amount of deformation (deflection amount) of the elastic deformation in the vertical direction, for example, the spring constant of the elastic hinge portion 22 is provided. Accordingly, the amplifier 24 amplifies the potential output from the minute distance sensors 23 attached to the elastic hinge portions 22 of the measurement structures 18 according to the elastic deformation of the corresponding elastic hinge portions 22 in the vertical direction. When a signal converted into a voltage is input to the measuring instrument 25, the measuring instrument 25 converts the voltage input from the amplifier 24 into the measuring structures based on the deformation amount and the voltage conversion coefficient. 18 is converted to the amount of elastic deformation of each elastic hinge portion 22, and the minute distance sensor 23 is attached based on the amount of deformation obtained by the conversion and the spring constant of the elastic hinge portion 22. Each measurement structure interposed between each jack 7 and the roll holding frame 6 by calculating the magnitude of the load acting on the elastic hinge portion 22 of each measurement structure 18 in the vertical direction. Acting on the body 18 Are to be able to determine the load in the vertical direction in which.

  Each minute distance sensor 23 may be an eddy current type distance sensor (eddy current type displacement sensor) or a laser type distance sensor (laser type displacement sensor). Further, the amount of elastic deformation in the vertical direction generated in the elastic hinge portion 22 of each measurement structure 18 by the printing pressure of the pressing-side printing roll 5 on the lower roll 9 is determined by the roll holding frame of the elastic hinge portion 22. Any type of minute distance sensor 23 may be used as long as it can be measured as a change in the distance to 6.

  Other configurations are the same as those shown in FIGS. 1 and 2, and the same components are denoted by the same reference numerals.

  In the printing apparatus equipped with the printing pressure measuring device of the printing apparatus according to the present embodiment having the above-described configuration, the pressing rod side printing held by the roll holding frame 6 by contracting the operation rod 7a of each jack 7 is performed. When the printing roll 5 is pulled up to a position separated from the lower roll 9 to a required dimension and the printing process is stopped, the roll 5 is interposed between the jacks 7 and the roll holding frame 6. In each of the measurement structures 18, the weights of the roll holding frame 6 and the pressing-side printing roll 5 that are supported in a state of being suspended via the measurement structures 18 are pulled in the vertical direction. Acts as a load. Therefore, upward elastic deformation occurs in each elastic hinge portion 22 of each measurement structure 18, and the amount of deformation is attached to each elastic hinge portion 22 by the minute distance sensor 23. Accordingly, the measuring instrument 25 detects the increase in the distance to the holding frame 6. Therefore, when the load of the printing pressure described later is set to a positive value, the minute distance sensor 23 detects the above-described distance. Based on the amount of upward elastic deformation of the elastic hinge portion 22 of the measurement structure 18, the weight of the roll holding frame 6 and the pressing-side printing roll 5 acting on each measurement structure 18 is applied. The load is detected as a negative value.

  In this state, the actuating rod 7a of each jack 7 is extended to lower the pressing side printing roll 5 held on the roll holding frame 6, and the pressing side printing roll 5 that is lowered is moved to the lower roll 9. When it comes into contact with a printing paper (not shown) on the upper side, the weight of the roll holding frame 6 and the pressing-side printing roll 5 suspended by the jacks 7 via the measurement structures 18 is determined. However, since the lower roll 9 is received, the vertical tensile load due to the weight of the roll holding frame 6 and the pressing-side printing roll 5 acting on each measurement structure 18 is reduced. As the jacks 7 extend, the weights of the roll holding frame 6 and the pressing-side printing roll 5 are all received by and supported by the lower roll 9. At that time, the vertical tensile load acting on each measurement structure 18 becomes zero, and thus the upward elastic deformation of each elastic hinge portion 22 of each measurement structure 18 is eliminated. Therefore, the load detected by the measuring instrument 25 based on the signal output from each minute distance sensor 23 becomes zero.

  Thereafter, when the jacks 7 are further extended to urge the pressing-side printing roll 5 that is in contact with the lower roll 9 via printing paper (not shown) together with the roll holding frame 6, The pressing-side printing roll 5 is pressed against the lower roll 9 by a downward pressing force to generate a printing pressure.

  At this time, each measurement structure 18 provided between each jack 7 and the roll holding frame 6 has a printing pressure applied to the lower roll 9 from the pressing-side printing roll 5. The reaction force acts as a compressive load in the vertical direction via the pressing-side printing roll 5 and the roll holding frame 6. For this reason, downward elastic deformation (direction approaching the roll holding frame 6) occurs in each elastic hinge portion 22 of each measurement structure 18, and the amount of deformation of the downward elastic deformation generated in each elastic hinge portion 22 occurs. Is detected as a decrease in the distance from the roll holding frame 6 by the minute distance sensors 23, the measuring instrument 25 has a deformation amount of downward elastic deformation generated in the elastic hinge portions 22. From the spring constant of the elastic hinge portion 22, a load due to the reaction force of the printing pressure acting on each measurement structure 18 is detected. Therefore, the measuring instrument 25 measures the load of the printing pressure as a value equal to the reaction force of the printing pressure.

  As described above, according to the printing pressure measuring method and apparatus of the printing apparatus of the present embodiment, the pressing-side printing roll 5 is interposed between the lower roll 9 and printing paper (not shown) by the operation of each jack 7. Rolls generated in the elastic hinge portion 22 of the measurement structure 18 provided between the jacks 7 and the roll holding frame 6 holding the pressing-side printing roll 5 when printing is performed by pressing The printing pressure can be measured based on the amount of elastic deformation in the direction approaching the holding frame 6.

  Further, when the printing pressure is measured, the elastic deformation in the direction close to the roll holding frame 6 of each elastic hinge portion 22 of each measurement structure 18 which is the basis of the measurement of the printing pressure is caused by the pressing side. Since it is not affected by the weight of the printing roll 5 and the weight of the lower roll 9, the pressing-side printing roll 5 and the pressing-side printing roll 5 A printing pressure smaller (lighter) than the load due to the weight of the lower roll 9 can be accurately measured.

  Therefore, also in the present embodiment, as shown by a two-dot chain line in FIG. 6A, a roll pressing mechanism of the pressing-side printing roll 5 based on the measured value of the printing pressure input from the measuring instrument 25. By providing a jack control device 17 that gives a control command to the jack 7 to be used, the control adjustment of the printing pressure for the lower roll 9 of the pressing side printing roll 5 can be performed more precisely than before. Therefore, it is possible to improve the printing accuracy, and it is advantageous for the implementation of precision printing such as printing a thin line having a line width of about 10 μm, as in the case of forming an electronic circuit by printing. can do.

  In addition, by changing the amplification factor of the amplifier 24 that amplifies a signal input from each minute distance sensor 23 attached to each elastic hinge portion 22 of each measurement structure 18, the mark in the measuring instrument 25 is changed. The pressure measurement range can be easily changed.

  Further, each measurement structure 18 interposed between each jack 7 and the roll holding frame 6 has a beam portion 20 as compared with the measurement structure 18 shown in FIG. By changing the depth of each notch 21 provided on both upper and lower surfaces of the predetermined portion and changing the spring constant of the elastic hinge portion 22 between them to the measurement structure 18. Even when the printing pressure generated between the roll 5 and the lower roll 9 is smaller (lighter), or when the printing pressure is larger (heavy), each of the measurement structures 18 is caused by the printing pressure. Since the deformation amount of the elastic deformation in the direction close to the roll holding frame 6 generated in the elastic hinge portion 22 can be appropriately adjusted to the deformation amount detectable by the minute distance sensor 23, the printing pressure measurement range Can be changed greatly.

  The present invention is not limited only to the above-described embodiment, and a pressing cylinder as a pressing object disposed below the pressing-side printing roll 5 such as a plate cylinder in a state of being biased downward. An example of application in the case where the lower roll 9 is brought into contact with the lower roll 9 via a printing sheet (not shown) is shown. You may apply when making it contact directly, or when making it contact directly with a flat printed object as a pressing target object.

  Alternatively, the pressing-side printing roll 5 may be used as an impression cylinder, and may be applied to a plate cylinder or a blanket cylinder, which is an object to be pressed, disposed below the pressing cylinder 5 from above through a printing object such as printing paper.

  Further, when the pressing-side printing roll 5 is used as a blanket cylinder and is directly brought into contact with the plate cylinder, which is a pressing object disposed below, from the upper side through the printing object such as printing paper, When contacting from above, it may also be applied to directly contacting from above the flat plate or printing object that is the object to be pressed.

  Furthermore, in the printing apparatus, when the printing process is performed by bringing the pressing-side printing roll 5 into contact with the required pressing target object arranged below the pressing roll 5 while applying the printing pressure. Any combination of the pressing-side printing roll 5 and the pressing object may be used.

  The printing target may be other than printing paper.

  In the embodiment shown in FIGS. 1 to 3, the measurement structure 8 includes a portion where the horizontal cross-sectional area can be accurately determined at a required portion serving as a load transmission path in the vertical direction, and a compressive load from at least the vertical direction is provided. A correlation is obtained between the magnitude of the compression load when acting and the amount of strain deformation in the compression direction generated in the portion where the horizontal cross-sectional area is accurately known, and depending on the load of the printing pressure to be detected. As long as it is possible to cause distortion deformation of a strain amount corresponding to the detection ability of the strain sensor 14 to be used, any number other than those illustrated, such as changing the number of columnar portions 13 or changing the thickness, etc. You may employ | adopt the structure 8 for a measurement of a structure.

  Further, if the strain sensor 14 can detect at least the amount of strain deformation in the compression direction generated in the portion where the horizontal cross section of the measurement structure 8 can be accurately understood, the configuration of the measurement structure 8 can be realized. Accordingly, the shape and size, and the attachment position with respect to the measurement structure 8 may be changed as appropriate.

  5 and 6 (a) and 6 (b), the measurement structure 18 is a portion that can be elastically deformed in a direction close to the roll holding frame 6 when receiving a compressive load at least in the vertical direction. And a correlation between the magnitude of the compression load and the amount of deformation of the portion that is elastically deformed in the direction approaching the roll holding frame 6 by the load, and the load of the printing pressure to be detected As long as the elastic deformation of a deformation amount corresponding to the detection capability of the minute distance sensor 23 used can be generated, the measurement structure 18 having any configuration other than that illustrated may be adopted.

  The minute distance sensor 23 may be of any type as long as it can detect the amount of deformation of the measurement structure 18 that is elastically deformed in the direction close to the roll holding frame 6 by the compressive load in the vertical direction. The minute distance sensor 23 may be used, and the installation location may be changed as appropriate according to the type of the minute distance sensor 23.

  In each of the above-described embodiments, the roll holding frame 6 transmits the expansion / contraction operation force of each jack 7 to the pressing-side printing roll 5, and the pressing-side printing roll 5 is disposed below the required pressing force. As long as it can be moved up and down within a predetermined range from the position where it comes into contact with the object to be pressed so as to be pressed with the required printing pressure to the position where it is separated from the object to be pressed above the required dimension, A roll holding frame 6 having a shape other than that may be used. The roll holding frame 6 may be provided with a drive mechanism for rotationally driving the pressing side printing roll 5 according to the type of the pressing side printing roll 5.

  As a roll pressing mechanism for pressing the pressing-side printing roll 5 against a required pressing object, the pressing-side printing roll 5 is attached to two positions corresponding to both axial ends of the pressing-side printing roll 5 in the longitudinal direction of the roll holding frame 6. Although the jack 7 is illustrated, the pressing-side printing roll 5 can be lifted and lowered within the predetermined lifting range, and the pressing-side printing roll 5 is in close contact with a required pressing object with a required printing pressure. If possible, the installation location and the number of the jacks 7 may be appropriately changed, and any type of roll pressing mechanism other than the jack may be employed.

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

5 Press side printing roll 7 Jack (roll pressing mechanism)
8 Measurement structure 9 Lower roll (object to be pressed)
14 Strain sensor (deformation detection means)
16 Measuring instrument 18 Measuring structure 23 Micro distance sensor (deformation detecting means)
25 measuring instruments

Claims (6)

  When applying a downward pressing force to the pressing side printing roll arranged above the pressing object by a roll pressing mechanism and bringing the pressing side printing roll into contact with the pressing object with the required printing pressure, Deformation occurring in the measurement structure provided between the roll pressing mechanism and the pressing side printing roll is detected by the deformation detection means, and the measurement structure detected by the deformation detection means Printing pressure measurement for a printing apparatus, wherein the printing pressure on the pressing object of the pressing-side printing roll is measured based on a correlation between the deformation amount of the pressing member and the load and deformation amount of the measurement structure. Method.   As the measurement structure, a measurement structure having a known correlation between the compressive load in the vertical direction and the strain amount of the strain deformation compressed in the vertical direction is used, and the distortion generated in the measurement structure is used as the deformation detection means. The printing pressure measurement method for a printing apparatus according to claim 1, wherein a strain sensor capable of detecting a deformation amount of deformation is used.   As the measurement structure, a measurement structure having a known correlation between the compressive load in the vertical direction and the amount of elastic deformation in the vertical direction at the required location is used, and the required in the measurement structure is used as the deformation detection means. A minute distance sensor that detects the deformation amount of the elastic deformation in the direction close to the pressing-side printing roll at the location as a change in distance to the required location whose relative position is fixed with respect to the pressing-side printing roll is used. The printing pressure measuring method of the printing apparatus according to claim 1.   A measurement structure is interposed between the pressing-side printing roll arranged above the pressing object and a roll pressing mechanism for applying a downward pressing force to the pressing-side printing roll, and the measurement A deformation detecting means for detecting deformation occurring in the structural body and a measuring instrument, and the pressing side printing roll to which the pressing force is applied by the roll pressing mechanism is applied to the pressing object. Based on a known correlation between the deformation amount detection signal of the measurement structure input from the deformation detection means and the load of the measurement structure and the deformation amount, which is input from the deformation detection means when pressed and contacted, A printing pressure measuring apparatus for a printing apparatus, comprising a function of measuring a printing pressure on a pressing object of a pressing side printing roll.   The measurement structure is a measurement structure whose correlation between the compressive load in the vertical direction and the strain amount of the strain deformation compressed in the vertical direction is known, and the deformation detection means is the strain generated in the measurement structure. The printing pressure measuring device for a printing apparatus according to claim 4, wherein the printing pressure measuring device is a strain sensor for detecting a deformation amount of deformation.   The measurement structure is a measurement structure in which the correlation between the vertical compressive load and the amount of elastic deformation in the vertical direction at a required location is known, and the deformation detection means is the required structure in the measurement structure. A micro distance sensor for detecting the amount of elastic deformation in the direction close to the pressing-side printing roll at a location as a change in distance to a required location whose relative position is fixed with respect to the pressing-side printing roll. Item 5. A printing pressure measuring apparatus for a printing apparatus according to Item 4.

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