JP2014133324A - Wiping roller automatic control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically control the state of contact between a wiping roller and an intaglio cylinder by observing deformation such as irregularity formed on the surface of the wiping roller during printing in a wiping device for an intaglio printing machine.SOLUTION: A wiping roller automatic control device accurately detects the surface state of a wiping roller by plural surface position detection sensors which are fixed to a portion corresponding to a pattern formed on an intaglio plate surface and a surface position detection sensor provided on a rail movable in axial direction of the wiping roller as sensors for detecting the surface state of the wiping roller, and compares the detected surface state with a pre-inputted reference value thereby automatically controlling the state of contact between the wiping roller and the intaglio cylinder.

Description

  The present invention relates to a wiping device for an intaglio printing press, and more particularly to a wiping roller automatic control device for automatically controlling the contact state of a wiping roller in order to reduce printing trouble caused by deformation of the wiping roller during printing. It is an invention.

  Intaglio printing technology is used as a means for authenticating whether a banknote, stock certificate, securities such as bonds, various certificates and important documents are genuine or counterfeit. An intaglio printing machine is used to adopt this intaglio printing technology, but in order to form an intaglio image line, the ink was transferred from the inking device to the intaglio plate surface and adhered to other than the image line portion of the transferred ink. The ink is wiped off by pressing a wiping roller that rotates in the opposite direction to the intaglio plate surface, and printing is performed with the ink remaining on the image area on the intaglio plate surface.

  The wiping roller is always in contact with the intaglio plate surface during operation of the intaglio printing machine, and excess ink adhering to the intaglio plate surface must be wiped off. Also, the thermal expansion of the wiping roller causes the partial expansion and partial wear, and the surface hardness of the wiping roller decreases partially, so that the contact pressure between the intaglio cylinder and the wiping roller partially decreases, and printing trouble due to unwiping remains, etc. Will occur.

In order to suppress troubles such as wiping residue, the operator monitors the fluctuation state of the contact pressure,
Although the contact pressure between the intaglio cylinder and the wiping roller is managed by skilled techniques, there is room for improvement because it depends on the technical capabilities of the operator.

  Therefore, the applicant of the present invention has installed a wiping roller indicating frame mechanism composed of a mechanism for fixing the wiping roller installed on the wiping layer and a finishing blade mechanism for continuously applying the set hydraulic pressure with respect to the intaglio cylinder. A wiping device having a control device that performs pressure management by measuring the reaction force with a pressure gauge, automatically moving the reaction force to a preset value, has been filed (for example, patent document) 1).

  Further, the present applicant detects a contact state between the wiping roller and the intaglio cylinder with a plurality of sensors and compares it with an allowable range input in advance, thereby automatically controlling the contact state of the wiping roller. (For example, refer to Patent Document 2).

  The automatic wiping roller control device of Patent Document 2 detects a contact state of the wiping roller with respect to the intaglio cylinder, and therefore a wiping roller surface position detection sensor for detecting the surface state of the wiping roller, and a contact width provided in the width direction of the wiping roller. A detection sensor and a wiping roller diameter sensor for detecting the diameter of the wiping roller are provided, and the information obtained from these sensors and the data obtained from the load current detector are compared with a permissible range input in advance. The contact width with respect to the intaglio cylinder on the motive side and the operating side is automatically controlled.

  In addition, the present applicant, as a device for grinding local wear occurring on the surface of the wiping roller during printing, a surface detection device for detecting the uneven state of the surface of the wiping roller movable in the axial direction of the wiping roller, and surface grinding An application has been filed for a wiping roller grinding device provided with a polishing member (for example, see Patent Document 3).

  The wiping roller grinding device of Patent Document 3 detects a partial wear generated on the surface of the wiping roller by a surface detection device provided on a rail that is movable in the axial direction of the wiping roller. When it is determined that grinding is necessary, the surface condition of the wiping roller is automatically controlled by bringing a polishing jig into contact with the wiping roller during printing.

Japanese Patent No. 4654396 Japanese Patent No. 41005623 JP 2009-160810 A

  However, the wiping device of Patent Document 1 measures the horizontal reaction force that the wiping roller receives from the intaglio cylinder, and controls the contact pressure between the wiping roller and the intaglio cylinder by controlling to a preset value. There remains a problem that even partial uneven wear that does not affect the reaction force in the horizontal direction cannot be detected.

  Further, the automatic wiping roller control device disclosed in Patent Document 2 includes a wiping roller surface position detection sensor, a contact width detection sensor, and a wiping roller diameter measurement sensor provided at both ends in the axial direction of the wiping roller, and a load current detector. Since the contact state of the wiping roller is detected based on the information obtained from the above, it is difficult to accurately detect even partial wear that partially occurs on the surface of the wiping roller.

  The uneven wear that occurs on the surface of the wiping roller tends to occur in the portion corresponding to the pattern portion (concave portion) formed on the intaglio plate surface. However, in the invention of Patent Document 2, such partial uneven expansion is detected. As a result, the above-mentioned printing trouble may occur, and improvement has been desired.

  Moreover, in invention of patent document 3, the uneven | corrugated state which generate | occur | produces on the surface of the wiping roller obtained by the surface detection apparatus fixed on the rail is detected, and the surface state is compared with a reference value inputted in advance. Since the adjustment is made, there remains a problem that it is impossible to cope with the occurrence of specific irregularities that occur during the movement of the surface detection device.

  The present invention was created to solve the above-described problems, and provided with a plurality of surface state detection sensors in accordance with the pattern formed on the intaglio plate surface with respect to the surface of the wiping roller, and the axial direction of the wiping roller In addition, a movable surface condition detection sensor is also installed, so that the surface condition of the wiping roller as a whole, contact pressure changes on the driving and operating sides of the wiping roller, and partial uneven wear that occurs suddenly are instantaneous. The wiping roller automatic control device for automatically controlling the contact state between the intaglio plate surface and the wiping roller by detecting the surface state at all locations on the surface of the wiping roller.

  An automatic wiping roller control device of the present invention is a wiping roller automatic control device that monitors the surface state of a wiping roller of an intaglio printing press and automatically controls pressure adjustment to the intaglio cylinder. An operation mechanism that inputs initial conditions related to the surface condition of the paper, setting range including allowable range and rotational speed, and the axial direction of the wiping roller fixed to the machine frames on both sides of the intaglio printing press to detect the surface condition of the wiping roller A movable surface state detection mechanism having at least one detection unit fixed to a movable unit that can move to the surface, and a surface state of the wiping roller at a position corresponding to the pattern portion on the intaglio plate surface installed on the intaglio plate cylinder Fixed with at least one detector fixed to the machine frame on both sides of the intaglio printing press A surface state detection mechanism, a determination mechanism for comparing input data obtained from the mobile surface state detection mechanism and the fixed surface state detection mechanism with a pre-input allowable range, and an intaglio of the wiping roller according to the determination result An automatic wiping roller control device having at least a control mechanism for controlling a contact state with respect to a cylinder and an operation of each mechanism.

  Further, the fixed surface state detection mechanism and / or the movable surface state detection mechanism in the automatic wiping roller control device of the present invention measures the laser distance meter for measuring the distance to the surface of the wiping roller and the temperature of the surface of the wiping roller. An automatic wiping roller control apparatus having at least a temperature sensor.

  In addition, the automatic wiping roller control device of the present invention has a notification mechanism that stops the operation of the intaglio printing press and notifies the occurrence of an abnormality when a contact abnormality of the wiping roller surface state is detected by the determination mechanism. The wiping roller automatic control device is characterized.

  By using the automatic wiping roller control device of the present invention, it is possible to reliably detect poor contact due to partial expansion occurring on the surface of the wiping roller and also to detect partial uneven wear that occurs suddenly. Furthermore, depending on the degree of partial expansion, the printing machine can be stopped at a stage before trouble such as liquid overflow occurs, so that it is possible to minimize the occurrence of paper loss due to printing trouble. There is an effect.

  In addition, since the contact state between the intaglio plate surface and the wiping roller surface can be kept constant, the durability of the wiping roller itself can be improved, and the adjustment of the wiping roller requiring skilled techniques can be automatically controlled. The workability is remarkably improved.

  In addition, the automatic wiping roller control device of the present invention can reliably detect uneven wear or partial expansion generated on the surface of the wiping roller and can automatically control the wiping roller pressure, so that the wiping roller is damaged by excessive concave pressure. Etc., and the printing durability of the wiping roller is improved.

The figure which shows the cross section of the intaglio printing press provided with the wiping roller automatic control apparatus of this invention The figure which shows the mobile surface state detection apparatus of this invention The figure which shows the fixed surface state detection apparatus of this invention The figure showing the positional relationship of the movable surface state detection apparatus of this invention, a fixed surface state detection apparatus, and an intaglio cylinder The figure which shows the surface state detected from the surface of a wiping roller (4) by a movable surface state detection apparatus The figure which shows the surface state detected from the wiping roller (4) surface by a fixed surface state detection apparatus Block diagram of the automatic wiping roller control device of the present invention The flowchart which shows the process of the wiping roller automatic control apparatus of this invention.

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

  FIG. 1 is an example showing a cross section of an intaglio printing press (1) equipped with an automatic wiping roller control device of the present invention. The intaglio printing machine (1) uses an inking device (not shown) to transfer ink to the intaglio plate surface on the intaglio cylinder (3), and among the transferred ink, the ink attached to the non-image area is transferred to the intaglio plate surface. The ink is transferred to the paper passing between the intaglio cylinder (3) and the impression cylinder (2) after wiping with a wiping roller (4) rotating in the opposite direction to the intaglio cylinder. Printing is performed.

  Further, the excess ink wiped off by the wiping roller (4) is washed by the cleaning member (6) contained in the cleaning liquid retained in the wiping tank (5) on which the wiping roller (4) is suspended. The cleaning liquid remaining on the wiping roller (4) is removed by the finishing blade (7).

  By continuously performing these series of steps, the contact surface between the surface of the wiping roller (4) and the intaglio plate surface generates heat due to friction in the image area and the non-image area where a pattern or the like is formed on the intaglio plate surface. As a result, a difference occurs in the degree of wear and the wiping roller (4) is unevenly worn.

  In addition, because of the thermal expansion, the coefficient of expansion is different between the imaged area and the non-imaged area of the intaglio plate surface, so partial partial expansion occurs on the surface of the wiping roller (4) that had a uniform diameter before printing, This contributes to uneven wear.

  Thus, if uneven wear occurs on the surface of the wiping roller (4), all of the ink adhering to the non-image area of the intaglio plate surface cannot be wiped off, and the remaining ink is transferred to the paper, resulting in print quality. May be affected.

  Further, uneven wear such as scratches may occur on the surface of the wiping roller (4). The cause of this scratch is that the surface of the wiping roller (4) is the surface of the intaglio plate surface at the contact portion between the edge of the image line portion formed on the intaglio plate surface on the intaglio cylinder (3) and the surface of the wiping roller (4). When the concave portion is inserted into the concave portion, uneven wear (scratches, etc.) occurs on the surface of the wiping roller due to the edge of the concave portion forming the image portion.

  Further, in the cleaning member (6) in the wiping tank (5), the ink deposited when cleaning the ink adhering to the surface of the wiping roller (4) is solidified or foreign matter is accumulated, and these are collected by the wiping roller ( 4) When scraping unnecessary wiping liquid with the finishing blade (7) in contact with the surface and adhering to the surface, foreign matter is caught between the surface of the wiping roller (4) and the finishing blade (7). .

  In this way, partial uneven wear may occur on the surface of the wiping roller (4). In such a case, in the wiping roller (4) where uneven wear has occurred, excess ink adhered to the non-image area on the intaglio plate surface. Cannot be wiped off, which may affect the print quality.

  In addition, when uneven wear occurs on the surface of the wiping roller (4), the cleaning liquid adhering to the surface of the wiping roller (4) cannot be scraped off by the finishing blade (7), and liquid rises. May be affected.

  FIG. 2 is a diagram showing a movable surface state detection device (8) in the automatic wiping roller control device of the present invention. The movable surface state detection device (8) includes a slider rail (12) having a detector (9) including at least one laser distance meter and a temperature sensor fixed to a machine frame (11) of the intaglio printing machine (1). ) By continuously measuring the distance to the surface of the wiping roller (4) while being moved by the driving device (13) in the axial direction of the wiping roller (4). The presence or absence of a partial uneven shape is detected.

  This movable surface state detection device (8) has an axial direction depending on the rotational speed of the wiping roller (4) and the printing machine (1), the heat generation state of the surface of the wiping roller (4), and the use state of the wiping roller (4). The speed to move to can be adjusted. Further, at least two movable surface state detection devices (8) are provided at positions opposed to the axial direction of the wiping roller (4), and are moved in different directions at the same speed, so that each movable surface state detection device ( By detecting the surface state of the wiping roller (4) obtained from 8), the accurate surface state can be detected.

  FIG. 3 is a diagram showing a fixed surface state detection device (14) in the automatic wiping roller control device of the present invention. The fixed surface state detection device (14) includes a detector (9) including at least one laser distance meter and a temperature sensor on a slider rail (12) fixed to a machine frame (11) of an intaglio printing press. Both ends of the surface of the wiping roller (4) which are fixed by the fixing jig (10) are less likely to be deformed, and there are many patterns such as patterns formed on the intaglio plate surface. It is provided at a plurality of locations where the surface is likely to be deformed. In FIG. 3, the fixed surface state detection devices (14) are provided at six locations with respect to the axial direction of the wiping roller (4), but the present invention is not limited to this, and the fixed surface state detection device (14). ) Is increased, it is possible to accurately detect the occurrence of unevenness in the rotational direction.

  Similarly to the mobile surface state detection device (8), the fixed surface state detection device (14) is fixed to the slider rail (12) fixed to the machine frame (11), and the mobile surface state detection device ( 8) Based on the data obtained from 8), the pattern portion formed on the intaglio plate surface is moved and fixed to a plurality of locations including a portion where the surface state is stable and a portion where the surface state is particularly deformed. It is also possible to efficiently detect the degree of deformation in the rotational direction of the wiping roller (4) in accordance with the degree of progress of deformation even in places other than many locations.

  FIG. 4 shows the positional relationship among the above-described movable surface state detection device (8), fixed surface state detection device (14), and intaglio cylinder (3). The movable surface state detection device (8) and the fixed surface state detection device (14) are installed so as to be horizontal with respect to the wiping roller (4), and are fixed on the intaglio cylinder (3) side. (14) The movable surface state detection device (8) is installed on the finishing blade (7) side. In this arrangement, the arrangement of the movable surface state detection device (8) and the fixed surface state detection device (14) can be exchanged.

  FIG. 5 shows the surface state of the wiping roller (4) detected when the printing is movable by the automatic wiping roller control device of the present invention. FIG. 5 shows data obtained from the movable surface state detection device (8) when the intaglio printing press (1) is in operation, along the slider rail (12) provided in the width direction of the wiping roller (4). It shows the distance to the surface of the wiping roller (4) detected when moving. FIG. 5 shows the distance to the surface of the wiping roller when the multi-sided sheet is printed. The human image portion where the intaglio image line is most formed for each row of the multi-sided sheet, and the next highest fee. FIG. 2 shows the surface state of the wiping roller at the end portion of the wiping roller, the watermark portion where no intaglio image line portion exists, and the wiping roller.

  As shown in FIG. 5, there is a lot of wear on the portion with many symbols formed on the intaglio plate surface, and on the contrary, both end portions in the axial direction of the wiping roller (4), between the surfaces in each row of the multi-faced sheet and the watermark portion Since no intaglio image line is formed, wear due to biting of the surface of the intaglio plate surface on the wiping roller (4) does not occur, and the degree of wear is small. Thus, the partial uneven wear which generate | occur | produces on the surface of a wiping roller (4) is correctly detectable by using the movable surface state detection apparatus (8) of this invention.

  FIG. 6 is a view showing the surface state of the wiping roller (4) obtained from the fixed surface state detection device (14) when the intaglio printing press (1) is in operation. As shown in FIG. 4 shows data obtained from a plurality of laser distance meters provided in the axial direction of 4). The fixed surface state detection device (14) is preferably provided on the surface of the wiping roller (4) in a human image portion or a fee portion where the image line portion of the intaglio plate with the highest degree of wear is formed.

  The fixed surface state detection device (14) detects a change in the distance from the fixed surface state detection device (14) with respect to the surface of the wiping roller (4), and displays the surface of the wiping roller (4) in real time. In this way, scratches and the like occurring in the case are detected instantaneously. FIG. 6 is data obtained from the fixed surface state detection device (14) fixed to the human image portion of the wiping roller (4), and shows uneven wear occurring on the surface of the wiping roller (4). It can be seen that the detection is repeated at each rotation.

  As shown in FIGS. 5 and 6, the movable surface state detection device (8) detects the uneven shape generated in the axial direction of the wiping roller (4), and the fixed surface state detection device (14) detects the intaglio plate surface. Since it is possible to instantaneously detect scratches and the like that frequently occur in the region corresponding to the pattern portion of the wiping roller, it is possible to reliably detect both occurrence of partial expansion and specific scratches due to heat generation on the surface of the wiping roller (4). be able to.

  FIG. 7 is a block diagram showing a command system in the wiping device of the present invention, and shows a surface state detection mechanism, a contact pressure adjustment mechanism, a control mechanism, and a notification mechanism for detecting the surface state of the wiping roller (4). .

  The surface state detection mechanism includes a movable surface state detection device (8) and a fixed surface state detection device (14), and includes a laser distance meter, a temperature sensor, and the like provided for each based on an instruction from the control mechanism. The detector (9) detects the surface state of the wiping roller (4), and distributes the detected data to the storage unit of the control mechanism.

  The storage unit of the control mechanism determines whether or not the surface state of the wiping roller (4) is within the allowable range by comparing with a reference value input in advance, and the contact pressure before the allowable range is exceeded. The adjustment mechanism is instructed to adjust the contact state between the wiping roller (4) and the intaglio cylinder (3).

  Further, the control mechanism notifies the operator of the data distributed from the surface state detection mechanism through the notification mechanism. In particular, when sudden irregularities (such as scratches) are detected in the surface state obtained from the fixed surface state detection device (14), a warning is given.

  FIG. 8 is a flowchart showing a control process in the wiping apparatus of the present invention. First, in order to measure the initial value of the distance to the wiping roller (4) in Step 1, the movable surface state detection device (8) and the fixed surface state detection device (14) while rotating the wiping roller (4) at a low speed. ), The distance to the surface of the wiping roller (4) is measured, the reference data for setting the initial setting position is detected, and the initial value is set.

  In step 2, an allowable range at the time of wear from the set initial value is set and input to the operation unit. Regarding the input of this allowable range, the elapsed time from the input initial value to the allowable range is measured, and the occurrence of printing trouble is prevented before it becomes out of the allowable range. .

  In step 3, the surface data obtained from the movable surface state detection device (8) and the fixed surface state detection device (14) is determined, and it is compared and determined whether the surface state is within an allowable range. If an abnormal contact in the axial direction of the wiping roller (4) occurs during the comparison determination, the contact state on the driving side or the operation side is controlled.

  Also, if sudden irregularities (such as scratches) on the surface of the wiping roller (4) are detected by the fixed surface condition detection device (14), is it possible to respond by changing the contact pressure according to the depth of the irregularities? If it is determined that it is possible to respond, the contact pressure of the wiping roller (4) is automatically controlled, and if it is determined that it is not possible, a warning is given and printing paper is printed. Stop supplying and stop the printing machine.

  In addition, when the determination result by the determination unit and the determination result by the determination unit cannot be dealt with by adjusting the contact pressure, the grinding apparatus described in JP-A-2009-160810 is used. It can also be used in combination, and in that case, it is possible to cope with uneven wear such as scratches suddenly occurring on the surface of the wiping roller (4). Therefore, the loss of manufacturing time due to occurrence of printing trouble and emergency stop of the printing press can be minimized, which is a more preferable mode.

  Thus, by using the automatic wiping roller control device of the present invention, the state of contact of the wiping roller (4) with respect to the axial direction is automatically controlled and the wiping roller (4 ) Since it is possible to reliably detect uneven wear such as scratches suddenly occurring on the surface, it is possible to prevent printing troubles such as liquid overflow.

  Further, the fixed surface state detection device (14) of the present invention generates uneven wear specifically on the surface of the wiping roller by comparing the initial value with the surface state obtained from the mobile surface state detection device (8). The detection position can be changed to a region where uneven wear is likely to occur by extracting the region being instructed and instructing the fixed surface state detection device (14) through the control unit.

DESCRIPTION OF SYMBOLS 1 Intaglio printing press 2 Impression cylinder 3 Intaglio cylinder 4 Wiping roller 5 Wiping tank 6 Cleaning member 7 Finishing blade 8 Moving surface state detection apparatus 9 Detector 10 Fixing jig 11 Machine frame 12 Slider rail 13 Drive apparatus 14 Fixed surface state Detection device

Claims (3)

A wiping roller automatic control device that monitors the surface state of the wiping roller of the intaglio printing press and automatically controls the pressure adjustment to the intaglio cylinder,
The wiping roller automatic control device includes an operation mechanism for inputting a setting condition including an initial value, a permissible range, and a rotation speed regarding the surface state of the wiping roller;
In order to detect the surface state of the wiping roller, a movable surface state having at least one detection unit fixed to a both-side machine frame of the intaglio printing machine and fixed to a moving unit movable in the axial direction of the wiping roller. A detection mechanism;
In order to detect the surface state of the wiping roller at a position corresponding to the pattern portion on the intaglio plate surface installed on the intaglio cylinder, the fixed type has at least one detection portion fixed to the machine frame on both sides of the intaglio printing press. A surface state detection mechanism;
A determination mechanism for comparing and determining input data obtained from the movable surface state detection mechanism and the fixed surface state detection mechanism and an allowable range input in advance;
An automatic wiping roller control device comprising at least a control mechanism for controlling a contact state of the wiping roller with respect to the intaglio cylinder and an operation of each mechanism in accordance with the determination result.   The fixed surface state detection mechanism and / or the movable surface state detection mechanism includes at least a laser distance meter for measuring a distance to the surface of the wiping roller and a temperature sensor for measuring a temperature of the surface of the wiping roller. The wiping roller automatic control device according to claim 1.   3. A notification mechanism for stopping operation of the intaglio printing press and notifying occurrence of an abnormality when the contact mechanism detects a contact abnormality on the surface state of the wiping roller by the determination mechanism. The wiping roller automatic control device described.

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