JP2005313505A - Thrusting pressure detecting method of intaglio printing machine and its detecting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for easily detecting at least one among an intaglio printing pressure, the contact pressure of an intaglio form roller and the contact pressure of a wiping roller contacting with an intaglio plate cylinder in an intaglio printing machine and its detecting system. <P>SOLUTION: As a thrusting pressure controlling method, a thrusting pressure detecting apparatus for detecting at least one among the thrusting pressure of an impression cylinder (2) against an intaglio plate cylinder (1), that of the form roller (3) against the intaglio plate cylinder (1) and that of the wiping roller (4) against the intaglio plate cylinder (1) is provided on the rear surface of an intaglio printing plate surface (6). As one example of the thrusting pressure detecting apparatus, a strain gauge (5) is provided. During one revolution of the intaglio plate cylinder (1), the strain gauge (5) detects at least one among the thrusting pressure of the impression cylinder (2) against the intaglio plate cylinder (1), that of the form roller (3) against the intaglio plate cylinder (1) and that of the wiping roller (4) against the intaglio plate cylinder (1). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and a detection system for detecting respective pressing forces of an impression cylinder for an intaglio printing cylinder, an ink fleshing roller for the intaglio printing cylinder, and a wiping roller for the intaglio printing cylinder in an intaglio printing press.

  In the intaglio printing press, a strong pressing force from the impression cylinder, the ink deposition roller and the wiping roller is applied to the intaglio cylinder. Each of these pressing forces has a great influence on the amount of ink transferred to the intaglio plate surface and thus the amount of ink transferred to the printing paper.

  For this reason, the pressing force of the impression cylinder against the intaglio cylinder is generally expressed as an overlap amount from the distance between the centers of the intaglio cylinder and the impression cylinder and the cylinder diameter including the respective tailoring amounts. However, this method changes depending on the material of the impression cylinder packing, paper thickness, plate cylinder temperature, etc., and does not detect the actual pressing force. Therefore, a method has been proposed in which a strain gauge is provided to detect the pressing force of the impression cylinder against the intaglio plate cylinder, and the control is automatically performed by comparing with a preset reference value. In this method, the machine frame is deformed by a change in the distance between the shaft of the impression cylinder and the axis of the plate cylinder, and the pressing force of the two cylinders is measured from the deformation amount of the machine frame (for example, Patent Document 1). reference).

  In letterpress printing machines and offset printing machines, there has been proposed an apparatus that performs pressure management based on the nip width of a roller. The nip width is a contact width that can be obtained by applying pressure to two rollers in a printing press, and is provided to maintain an appropriate ink transfer property depending on the roller diameter, its material, ink characteristic values, and the like. This is the setting value of the roller.

  Further, as a roller nip width management device, a device including a contact pressure measurement unit, a movement amount calculation unit, an actuator, and a display unit has been proposed. This is because the contact pressure measurement unit measures the contact pressure between the rollers, the measured contact pressure is compared with a preset reference value by the movement amount calculation unit, and the actuator is based on the calculated movement amount. Thus, the roller shaft is moved to an appropriate position, and the contact pressure and the adjustment state are displayed on the display unit (see, for example, Patent Document 2).

  In addition, in order to always perform printing based on a constant printing pressure condition corresponding to the time distribution of blanket, intaglio, and substrate thickness distribution and blanket thickness, each surface pressure distribution is measured with a pressure sensor in advance. There has been proposed an apparatus and method for controlling printing based on the surface pressure distribution (see, for example, Patent Document 3).

  Further, the pressing force of the wiping roller against the intaglio cylinder is detected by detecting a value of a wiping roller load current measuring device attached to a wiping motor for rotating the wiping roller, and is used as a guide for the pressing force.

Japanese Patent No. 2930477 JP 2002-137365 A JP 2000-168028 A

  Patent Document 1 exemplifies a device for measuring the force with which the impression cylinder is placed on the plate cylinder as a known strain gauge in the embodiment, and suggests measuring the deformation amount of the machine frame. However, the pressing force between the impression cylinder and the plate cylinder is obtained from the amount of deformation of the machine frame due to the change in the distance between the impression cylinder axis and the plate cylinder axis. It is not something that is detected.

  The method in Patent Document 2 measures and controls the nip width between rollers in a printing machine using a plurality of rollers such as an offset printing machine, and measures the nip width between a plurality of rollers. Requires a plurality of rollers to be provided with pressure sensors for measurement.

  Further, in Patent Document 3, the pressure distribution is measured in advance using a pressure sensor sheet, and the height of the printing stage is controlled according to the pressure distribution state, and the pressure during printing is directly detected. It is not a thing.

  Further, the method of using the wiping roller load current value by detecting the wiping roller load current value as a guide for the wiping roller pressing force against the intaglio plate cylinder changes depending on various conditions such as the machine speed. It does not measure pressure.

  An object of the present invention is to solve the above-mentioned problems, and an apparatus for easily detecting at least one of an intaglio printing pressure during printing, a contact pressure of an intaglio ink landing roller, and a contact pressure of a wiping roller in contact with the intaglio plate cylinder, It is the method and detection system which detect each pressing force. Specifically, in the intaglio printing press, a strain gauge is provided on the back surface of the intaglio plate, and the pressing force of each of the impression cylinder to the intaglio cylinder, the ink landing roller to the intaglio cylinder, and the wiping roller to the intaglio cylinder is directly measured. It detects in real time with various contact pressures, and displays and saves data.

  The method for detecting the pressing force of an intaglio printing press according to the present invention includes an impression cylinder that provides an intaglio printing pressure, an intaglio cylinder that cooperates with the impression cylinder, an ink landing roller that supplies ink to the intaglio plate surface, and excess ink. In an intaglio printing press comprising a wiping roller for wiping off at least one of the pressing force of the impression cylinder against the intaglio cylinder, the pressing force of the ink landing roller against the intaglio cylinder and the pressing force of the wiping roller against the intaglio cylinder A pressing force detection device for detection is provided on the back surface of the intaglio plate surface, and includes detection means for detecting at least one of the pressing forces by the pressing force detection device.

  The method for detecting the pressing force of the intaglio printing press according to the present invention includes the pressing force detecting device provided on the back surface of the intaglio plate, the pressing force of the impression cylinder against the intaglio plate cylinder, the pressing force of the ink landing roller against the intaglio plate cylinder, and the intaglio plate. At least one pressing force of the wiping roller pressing force against the cylinder is detected as a stress strain by the pressing force detection device, the stress strain detected by the pressing force detection device is transmitted by the transmission means, and transmitted by the transmission means. The stress strain is received by the receiving means, and the stress strain received by the receiving means is processed by the information processing means and displayed and stored.

  In the method for detecting the pressing force of the intaglio printing press according to the present invention, the pressing force detecting instrument is a strain gauge.

  In the method for detecting a pressing force of an intaglio printing press according to the present invention, a pressing force detecting device provided on the back surface of the intaglio plate is provided so as not to contact the intaglio plate cylinder.

  The method for detecting the pressing force of the intaglio printing press according to the present invention includes the pressing force of the impression cylinder against the intaglio plate cylinder, the pressing force of the ink landing roller against the intaglio plate cylinder, and the pressing of the wiping roller against the intaglio plate cylinder. At least one pressing force among the pressures is detected as a stress strain by a pressing force detecting device.

  The pressure detection system for an intaglio printing press according to the present invention uses a strain gauge provided on the back surface of the intaglio plate to press the pressure of the impression cylinder against the intaglio plate cylinder, the pressure of the ink landing roller against the intaglio plate cylinder, and the intaglio plate cylinder A pressure detecting means for detecting at least one of the pressing forces of the wiping roller against the pressure, a transmitting means for transmitting the stress strain detected by the strain gauge by the transmitter, and the transmitted stress strain. Receiving means for receiving by the receiver, and information processing means for displaying and storing the received stress strain by processing are provided.

  According to the present invention, it is possible to detect the pressing force of the intaglio cylinder to the pressure cylinder, the intaglio cylinder to the ink landing roller, and the intaglio cylinder to the wiping roller in a single means and on a common scale in the intaglio printing press. Therefore, it is possible to accurately detect the pressing force between these rollers.

  In addition, each pressing force of the impression cylinder, the ink landing roller, and the wiping roller against the intaglio cylinder can be detected in real time while the intaglio cylinder makes one rotation, and a strain gauge is provided at a place where they directly contact each other. It is possible to accurately detect the stress strain at the contacting portion, and to accurately grasp the amount of ink transferred to the printing paper that greatly affects the print quality.

  The best mode for carrying out the present invention is shown in FIG. 1, a pressure detection system for an intaglio printing press, a diagram in which a strain gauge is attached to the back surface of the intaglio plate surface shown in FIG. 2, and the back surface of the intaglio plate surface shown in FIG. Side view with recesses and a strain gauge attached to the back side of the intaglio plate (in the direction of the arrow in FIG. 2), Side view with recesses on the surface of the intaglio plate cylinder shown in FIG. 4 and a strain gauge attached to the back side of the intaglio plate surface (Refer to the arrow direction in FIG. 2) Refer to the side view (the arrow direction in FIG. 2) where a film thicker than the thickness of the strain gauge is pasted on the back of the intaglio plate surface shown in FIG. explain.

  The intaglio printing unit comprises an impression cylinder (2) for providing intaglio printing pressure, an intaglio plate cylinder (1) cooperating with the impression cylinder (2), and an ink setting roller (3) for supplying ink to the intaglio plate surface (6). ) And a wiping roller (4) for wiping off excess ink remaining in the non-image area of the ink supplied to the intaglio plate surface (6), and the rotational direction of the roller is as shown in the figure. .

  The pressing force of the impression cylinder (2) against the intaglio printing cylinder (1) in the intaglio printing section, the pressing force of the ink setting roller (3) against the intaglio printing cylinder (1), and the wiping roller (4 ) Is provided directly on the back surface of the intaglio plate surface (6) for detecting at least one of the pressing forces. In the best mode and embodiment for carrying out the present invention, a strain gauge (5) is used as a pressing force detecting device.

  The strain gauge (5) provided on the back of the intaglio plate surface (6) properly detects when the impression cylinder, ink landing roller, and wiping roller come into contact with the intaglio plate cylinder, and accurate stress strain is detected. In order to be able to do so, it is preferable to provide the strain gauge (5) so as not to contact the intaglio plate cylinder (so as not to interfere).

  The invention is explained in more detail by means of examples.

  As shown in FIG. 2, the position where the strain gauge (5) is affixed is the tail end side of the intaglio plate surface (6) mounted on the intaglio plate cylinder (1) at the substantially central portion in the axial direction of the back surface, which does not obstruct actual printing. The outer side (margin portion) of the printing surface (7) is attached to the back surface of the intaglio plate surface (6) with an adhesive. Further, a lead wire (12) for transmitting the stress strain detected by the strain gauge (5) to the outside of the printing press is provided.

  The position where the strain gauge (5) is attached is not limited to this when it is not used for actual printing but only for detection. That is, when a pressing plate is detected by mounting a reference plate having a thickness equivalent to that of the printing plate surface (6), the strain gauge (5) can be attached to a desired position.

  In addition, although the adhesive agent was used as a means for attaching the strain gauge (5) to the recess (13) provided on the back surface of the intaglio plate surface (6), the present invention is not limited to this, and any means that can be applied may be used. .

  As shown in FIG. 3, in order to prevent the strain gauge (5) and the lead wire (12) from being damaged due to strong pressure in intaglio printing, the intaglio plate to which the strain gauge (5) is attached is applied. A recess (13) is provided on the back surface of the printing plate (6) with a size and depth corresponding to the strain gauge (5) and the lead wire (12), and the strain gauge (5) is provided in the provided recess (13). There is a method of sticking. In order to detect an accurate stress strain, it is necessary to apply a strain gauge (5) so that it does not come into contact with the intaglio cylinder (1) (so as not to interfere) when the strain gauge (5) is distorted. It is preferable to provide a recess (13) on the intaglio plate surface (6) with a size and depth considering the strain of 5).

  Moreover, in order to prevent damage to the strain gauge (5) and the lead wire (12), a method of providing a recess (13) with a size and depth corresponding to the strain gauge (5) on the back surface of the intaglio plate surface (6) is given. However, the present invention is not limited to this, and any application method that prevents damage to the strain gauge (5) and the lead wire (12) may be used.

  For example, as shown in FIG. 4 as an example of another sticking method, a recess (14) is provided on the surface of the intaglio cylinder (1) with a size and depth corresponding to the strain gauge (5). There is a method of attaching a strain gauge (5) to the intaglio plate surface (6) of the recess (14). In this case as well, in order to detect an accurate stress strain, it is necessary to affix the intaglio plate cylinder (1) so that it does not contact (not interfere with) when the strain gauge (5) is distorted. Is preferably provided with a recess (14) in the intaglio plate cylinder (1) with a size and depth taking into account the strain of the strain gauge (5).

  Furthermore, as shown in FIG. 5 as an example of another pasting method, a film (17) thicker than the thickness of the strain gauge (5) is pasted on the back surface of the intaglio plate surface (6), and the strain gauge (5) portion is cut. There is also a method to paste. In this case as well, in order to detect an accurate stress strain, it is necessary not to contact the intaglio plate cylinder (1) when the strain gauge (5) is distorted (so as not to interfere). It is preferable to apply a film (17) having a thickness considering the strain of the strain gauge (5).

  The transmitter (8) for transmitting each stress strain detected by the strain gauge (5) to the outside of the printing press affects the actual printing such as the tail edge side gap (15) of the intaglio cylinder (1). It is provided in the place where there is no. The gap portion is a notch for attaching the intaglio plate surface (6) to the intaglio plate cylinder (1), and has a tail edge side gap portion (15) and a tail side gap portion (16). .

  Hereinafter, in the intaglio printing press shown in FIG. 1, the detection of the pressing force of the intaglio cylinder to pressure cylinder, the intaglio cylinder to ink inking roller, and the intaglio cylinder to wiping roller in one embodiment embodying the present invention will be described. The pressing force detection system will be described with reference to the drawing, the flowchart of the pressing force detection method shown in FIG. 6, and the graph showing the pressing force detection result shown in FIG.

  The pressing force detection system includes pressing force detection means, transmission means, reception means, and information processing means.

  First, in the pressing force detection means, the strain gauge (5) affixed to the back surface of the intaglio plate surface (6) attached to the intaglio plate cylinder (1) by an adhesive is used during the rotation of the intaglio plate cylinder, particularly during one rotation. The pressures of the cylinders (2), the ink deposition rollers (3), and the wiping rollers (4) rotating in contact with the intaglio cylinder are detected as stress strains. The stress strain is detected by voltage and time (timing).

  Next, in the transmission means, the detected stress strain is wirelessly transmitted outside the printing press by the transmitter (8) connected by the lead wire (12). The means for transmitting the stress strain to the outside of the printing machine is not limited to this, and there is a method using a slip ring. However, in the present invention, a wireless transmission means is preferable in view of the wear of the contacts.

  Next, the stress strain transmitted by the receiving means is received by the receiver (9) installed outside the printing press. The received stress strain can be converted into a current value or a voltage value by a strain converter.

  Next, the stress strain received by the information processing means is arithmetically processed by the information processing apparatus (10) connected to the receiver (9) and displayed on the monitor in a graph. FIG. 7 is a schematic diagram showing the pressure detection result in a graph. This is because, during one rotation of the intaglio plate cylinder (1), the impression cylinder (2) with respect to the intaglio plate cylinder (1), the inking plate roller (3) and the intaglio plate cylinder (1) ) Is a graph showing the result of detecting the three stress strains of the wiping roller (4) and converting the detected stress strains into voltages. The horizontal axis shows time (timing), and the vertical axis shows voltage. Waveform a indicates the impression cylinder (2) with respect to the intaglio cylinder (1), b indicates the ink deposition roller (3) with respect to the intaglio cylinder (1), and c indicates the stress strain of the wiping roller with respect to the intaglio cylinder (1). ing. The recorder (11) connected to the information processing apparatus (10) is for recording the detected stress strain and graphed data as necessary.

  When the detection confirmation is completed, the detection means is not executed, and the process ends as it is. If the detection confirmation is to be continued, the impression cylinder (2) which rotates in contact with the intaglio plate cylinder (1) while the intaglio plate cylinder (1) rotates once again, and the ink setting roller (3 ) And wiping roller (4) The pressing force of each cylinder is detected as stress strain.

It is a figure which shows the pressing force detection system of the intaglio printing press which is one Example of this invention. It is a top view which stuck the strain gauge on the back surface of the intaglio plate surface which is one Example of this invention. It is a side view which provided the recessed part in the back surface of the intaglio plate surface which is one Example of this invention, and affixed the strain gauge on the back surface of the intaglio plate surface. It is a side view which provided the recessed part in the surface of the intaglio plate cylinder which is one Example of this invention, and affixed the strain gauge on the back surface of the intaglio plate surface. It is the side view which affixed the film thicker than the thickness of a strain gauge on the back surface of the intaglio plate which is one Example of this invention, and cut and affixed the part of the strain gauge. It is a flowchart of the pressing force detection method which is one Example of this invention. It is the schematic diagram which displayed the pressing force detection result which is one Example of this invention on the graph.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intaglio plate cylinder 2 Impression cylinder 3 Ink setting roller 4 Wiping roller 5 Strain gauge 6 Intaglio plate surface 7 Printing surface 8 Transmitter 9 Receiver 10 Information processing apparatus 11 Recorder 12 Lead wire 13 Concavity (concave portion provided on the intaglio plate surface)
14 Recess (Recess provided in the intaglio plate cylinder)
15 tail edge side gap part 16 tail edge side gap part 17 film

Claims (6)

In an intaglio printing press comprising:
Pressure detection for detecting at least one of a pressing force of the impression cylinder against the intaglio cylinder, a pressing force of the ink deposition roller against the intaglio cylinder, and a pressing force of the wiping roller against the intaglio cylinder A pressing force detection method for an intaglio printing press, comprising: a detector provided on a back surface of the intaglio plate surface, and detecting means for detecting at least one pressing force of the pressing force by the pressing force detection device. By the pressing force detecting device provided on the back surface of the intaglio plate surface, the pressing force of the impression cylinder against the intaglio plate cylinder, the pressing force of the ink setting roller against the intaglio plate cylinder, and the wiping roller of the wiping roller against the intaglio plate cylinder At least one pressing force of the pressing force is detected as stress strain by the pressing force detecting instrument, the stress strain detected by the pressing force detecting instrument is transmitted by the transmitting means, and the stress strain transmitted by the transmitting means is transmitted. The method according to claim 1, wherein the stress strain received by the receiving means is processed by an information processing means and displayed and stored. The method of detecting a pressing force of an intaglio printing press according to claim 1 or 2, wherein the pressing force detecting instrument is a strain gauge. 4. The method of detecting a pressing force of an intaglio printing press according to claim 1, wherein the pressing force detecting device provided on the back surface of the intaglio plate is provided so as not to contact the intaglio cylinder. During the rotation of the intaglio plate cylinder, at least one of the pressing force of the impression cylinder against the intaglio plate cylinder, the pressing force of the ink setting roller against the intaglio plate cylinder, and the pressing force of the wiping roller against the intaglio plate cylinder 5. The method of detecting a pressing force of an intaglio printing press according to claim 1, wherein the pressing force is detected as stress strain by the pressing force detecting instrument. At least one of the pressing force of the impression cylinder against the intaglio cylinder, the pressing force of the ink landing roller against the intaglio cylinder, and the pressing force of the wiping roller against the intaglio cylinder by a pressing force detection device provided on the back side of the intaglio plate surface A pressing force detecting means for detecting two pressing forces;
Transmitting means for transmitting the stress strain detected by the strain gauge by a transmitter;
Receiving means for receiving the transmitted stress strain by a receiver;
A pressing force detection system for an intaglio printing press, comprising: information processing means for displaying and storing the received stress strain by arithmetic processing.

Images