JP5044850B2 - Wiping roller grinding device - Google Patents

Description

The present invention relates to a wiping roller grinding apparatus in an intaglio printing machine, and more particularly to a technique for instantaneously detecting local wear on the surface of a wiping roller during printing and automatically grinding a worn portion.

FIG. 8 shows a schematic configuration diagram of a general intaglio printing press. An intaglio plate surface (21) formed with a plane as a non-image portion and a recess as an image portion is mounted on the peripheral surface of the intaglio cylinder (20). A wiping roller (4) for wiping is in contact. In addition, on the intaglio plate surface (21), a plurality of thickening rollers (22) for transferring ink from an ink fountain (not shown) are provided in pairs along the circumferential direction of the intaglio plate surface (21) at a predetermined interval.

In the intaglio printing operation, ink of each ink fountain (not shown) is finally transferred to the intaglio plate surface (21) on the intaglio cylinder via the landing roller (22). Of the transferred ink, the ink adhering to the portion other than the pattern portion is wiped by the wiping roller (4) rotating in reverse contact with the intaglio plate surface (21), and then the intaglio cylinder (20) and the impression cylinder (19 ) Is transferred by transferring the ink of the pattern portion remaining on the paper passing between.

When intaglio printing is continuously performed, irregularities such as scratches and roughness may sometimes occur on the surface of the wiping roller (4). Scratches on the roller surface are caused by contact resistance with the edge portion of the image area on the intaglio plate surface (21) rotating in contact, or the ink wiped off by the wiping roller (4) It can be assumed that it is deposited on the nonwoven fabric as the cleaning member (5), and then solidifies and becomes contact resistance when it comes into contact with the roller (4). Further, it can be assumed that the occurrence of roughness on the roller surface is caused by a group of bubbles and a group of water bubbles that have entered slightly during the production of the wiping roller.

In general, the ink wiped off by the wiping roller (4) is, as shown in FIG. 9, a cleaning member (5; for example, contained in the cleaning liquid retained in the wiping tank (25) on which the wiping roller (4) is suspended. The non-woven fabric) and the cleaning liquid remaining on the roller are removed by a finishing blade (6) located downstream of the roller (4) to prepare for the next plate surface (21). Once the surface of the wiping roller becomes uneven, a gap is generated between the wiping roller (4) and the finishing blade (6), and the cleaning liquid that is brought along with the wiping roller (4) can be scraped off. Since a part that disappears is generated, the cleaning liquid from the part adheres to the intaglio plate surface (21) and finally adheres to the paper, which significantly impairs the quality of the printed matter.

If the surface condition of the wiping roller (4) becomes significantly uneven, a problem will occur. Each time, the printing machine is stopped and the uneven surface on the surface of the wiping roller is ground with a polishing member or the like. However, since the operating efficiency is significantly reduced, sometimes the operator directly applies the abrasive paper or polishing cloth to the wiping roller (4) while the printing machine is operating (while the wiping roller is rotating). There is a case where the surface is pressed to correct the unevenness, and this work is troublesome and dangerous.

As a measure to solve this problem, a rubber roll grinding method for maintaining the outer diameter runout dimension of the ground rubber roll with high accuracy for a long period of time, shortening the grinding time and improving the surface property of the outer peripheral surface of the rubber roll, and A rubber roll grinding method for grinding an outer peripheral surface of an elastic layer of a rubber roll provided with an elastic layer made of a rubber material around an axis of a core metal shaft as a rubber roll, the both ends of the core metal shaft fixed to the rubber roll A grindstone that is set wider than the axial length of the outer peripheral surface of the elastic layer in a state where the outer peripheral surface of each part is held and fixed by a pair of diaphragm chucks and each diaphragm chuck is driven to rotate synchronously. There is a rubber roll grinding method and a rubber roll that are pressed and ground over the outer peripheral surface (see, for example, Patent Document 1).

JP 2007-015044 A

When the above-mentioned prior art patent document 1 is used, it is possible to maintain the outer diameter runout dimension of the ground rubber roller with high accuracy for a long period of time, shorten the grinding time, and improve the surface property of the outer peripheral surface of the rubber roller. Is possible. However, the rubber roller grinding method of Patent Document 1 is useful for roller grinding in the production of rubber rollers. However, when the wiping roller used for intaglio printing is used while the printing machine is in operation, it is worn using a grinding member. Since the roller grinding waste that appears when grinding a part cannot be removed and the remaining roller grinding waste adheres to the intaglio plate surface, it leads to wear of the intaglio plate surface, which directly affects the quality of the printed material and significantly improves the quality. It may be damaged. In addition, roller grinding waste is not useful because it leads to wear of the roller, and is not always a usable technique.

In addition, in the prior art, it is possible to polish uneven portions locally generated on the surface of the wiping roller. However, since the generated grinding waste cannot be removed at that time, the intaglio plate surface and the wiping are removed. The roller will wear out. As a result, the frequency of replacement of each member has increased, and the work load spent on the member replacement and the cost required for it have increased. In addition, as the technique of confirming local wear that occurs on the surface of the wiping roller, because it relied exclusively on visual inspection by the operator, abnormalities could not be discovered quickly, and a large number of abnormal printed products were generated. There was a problem.

Furthermore, when the surface of the wiping roller becomes uneven and affects the quality of the printed product, it can be dealt with by changing the amount of deflection of the finishing blade as appropriate, and metal oxides such as cobalt and carbon can be applied to the wiping roller. It is also possible to control the wear by suppressing the wear by setting the roller hardness high, or by reducing the viscosity of the ink to be used extremely, but these technologies are generated. This is a provisional measure of the problem, not a fundamental solution. In recent years, intaglio printing products used for securities printing and the like have been demanded of elaborate quality, so there has been a strong demand for improvement in the field of quality, and there has been some room for improvement.

The present invention has been made in order to solve the above-described problems. An outer peripheral surface of an elastic layer of a wiping roller in which an elastic layer made of a rubber material and / or a resin material is provided around an axis of a shaft core. A grinding device for a wiping roller for grinding, wherein a polishing jig is pressed against an outer peripheral surface of an elastic layer by pressing a polishing member over the outer peripheral surface, and is ground by a polishing jig located behind the polishing jig. A grinding device for a wiping roller, comprising: a grinding dust removal jig that contacts and removes the grinding scrap and a surface detection device that is installed opposite to the wiping roller and detects an uneven state of the surface of the wiping roller.

The polishing jig is composed of a base and a polishing member on the surface of the base, and the polishing member is a grinding device for a wiping roller which is a polishing paper or polishing cloth having a surface roughness Ra of 30 μm to Ra 60 μm.

The polishing jig is a wiping roller grinding device having a roll shape with a base shaft as an axis.

The polishing jig is a wiping roller grinding device that is installed on a shaft disposed so as to be parallel to the axis of the wiping roller and can move to face the roller.

The polishing jig is a wiping roller grinding device capable of pressing the wiping roller with a pressure of 0.5 MPa to 2.0 MPa.

The grinding waste removal jig is composed of a base and a waste removal member on the surface of the base, and the waste removal member is a wiping roller that is an adhesive member having a hardness of 30 to 60 degrees in Shore hardness. It is a grinding device.

Further, the grinding dust removing jig is a grinding device for a wiping roller having a roll shape with a base shaft as an axis.

The grinding dust removing jig is a grinding device for a wiping roller that is installed on a shaft disposed so as to be parallel to the axis of the wiping roller and can move to face the roller.

The grinding dust removing jig is a wiping roller grinding device that can press the wiping roller with a pressure of 0.1 MPa to 1.0 MPa.

The surface detection device is a grinding device for a wiping roller which is installed on a shaft disposed so as to be parallel to the axis of the wiping roller and can move to face the roller.

Further, a wiping roller grinding method for grinding an outer peripheral surface of an elastic layer of a wiping roller provided with an elastic layer made of a rubber material and / or a resin material around an axis of an axis, the outer surface of the elastic layer being A polishing means for pressing the polishing member against the outer peripheral surface for grinding, a grinding scrap removing means for contacting and removing the grinding scrap ground by the polishing means, and a surface of the wiping roller disposed opposite to the wiping roller A wiping roller grinding method comprising surface detecting means for detecting the uneven state of the wiping roller.

Further, there is provided a wiping roller grinding method for grinding an outer peripheral surface of an elastic layer of a wiping roller provided with an elastic layer made of a rubber material and / or a resin material around an axis of the shaft, and is installed facing the wiping roller. A surface detection means for detecting the uneven state of the surface of the wiping roller, a detection value storage means connected to the surface detection means for storing the detection value detected by the surface detection means, and a reference value for presetting and storing the reference value Based on the result of the analysis by the storage means, the comparison means for comparing the detection value of the detection value storage means and the reference value of the reference value storage means, the polishing means and the grinding dust removal means A wiping roller grinding method comprising: control means for controlling stepwise pressing contact with the wiping roller.

The grinding apparatus for a wiping roller according to the present invention detects irregularities appearing on the roller surface instantaneously and the correction by polishing of the portion is quickly performed, so that a good quality product is continuously obtained as an intaglio printed matter. There is an effect that it becomes possible.

In addition, the wiping roller grinding apparatus of the present invention can remove grinding scraps after polishing of the roller surface as appropriate, so that the uneven state of the roller surface can be corrected without the need to stop the printing machine. As a result, the non-operation time due to the machine stoppage is greatly reduced, and the productivity can be improved.

Furthermore, since the wiping roller grinding apparatus of the present invention can automatically correct the unevenness of the roller surface, it does not carry out the dangerous work of directly correcting the roller surface using an abrasive member by an operator that has been carried out until now. As a result, the safety in the roller surface correction work is improved and the load on the operator can be reduced.

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic sectional view of a wiping roller grinding apparatus of the present invention. FIG. 2 is a schematic cross-sectional view of the polishing jig, and FIG. 3 is a schematic view showing an installation state of the polishing jig. FIG. 4 is a schematic view showing an installation state of the surface detection device. Further, FIG. 5 is a schematic cross-sectional view of the grinding dust removal jig, and FIG. 6 shows an installation state of the grinding dust removal jig.

This will be described in detail with reference to FIG. When irregularities such as scratches appear on the surface of the wiping roller (4) due to ink fountain or the like adhering to the cleaning member (5), it is attached to the slider rail (16) disposed in the vicinity of the roller (4). The location is detected by the surface detection device (3), the detection data is stored in the detection value storage device (10) connected to the surface detection device (3), and is stored in a preset reference value storage device (9). The reference value is compared with the comparison device (11), and the comparison result is analyzed by the analysis device (8) connected to the comparison device (11). Based on this analysis result, the degree of abnormality of the surface condition of the roller (4) is judged, and if necessary, an instruction is propagated by the control device (7) connected to the analysis device (8), and each slider is With respect to the polishing jig (1) and the grinding dust removal jig (2) attached to the rail (16), the pressing against the roller (4) is sequentially controlled via the pressing member (15), and unevenness appearing on the surface of the roller is removed. This is a mechanism for correcting irregularities in the irregularities of the roller (4) by polishing and removing polishing debris.

Next, based on FIG. 2, FIG. 3, it demonstrates in full detail about a structure and operation | movement of a polishing jig (1). As shown in FIG. 2, the polishing jig (1) has a configuration in which, for example, a polishing member (14), which is a polishing paper or polishing cloth having a surface roughness Ra of 30 μm to Ra 60 μm, is bonded to a metal base (12). It is. Here, as the polishing jig (1), when the base (12) and the polishing member (14) are both rectangular as shown in FIG. 2 (a), or when the base (26) is shown as shown in FIG. 2 (b). ), And may be formed into a roll shape made of the polishing member (14).

Further, the polishing jig (1) formed by joining the polishing member (14) to the metal base (12) or the base shaft (26) is disposed in the vicinity of the roller (4) as shown in FIG. The fixed jig (23) mounted on the slider rail (16) with both ends fixed to the machine frame (24) is disposed at a position facing the roller (4). In addition, a pressing member (15) exists on the upper part of the polishing jig (1) fixed to the fixing jig (23), and the polishing jig (1) is 0.5 MPa or more to the wiping roller (4). This mechanism can be pressed at a pressure of 2.0 MPa. Further, the polishing jig (1) can be freely moved on the surface of the roller (4) in parallel with the roller axis by the driving device (17) disposed at the end of the slider rail (16). It is a mode. The polishing jig (1) follows the data analyzed by the analysis device (8), and the instruction from the control device (7) is propagated to the pressing member (15), so that the contact with the roller (4) is appropriately performed. Be controlled.

Next, the surface detection device (3) will be described in detail with reference to FIG. As shown in FIG. 4, the surface detection device (3) includes at least one detection device (18) such as an electronic camera and an optical sensor, and a fixing jig (23) for fixing the detection device (18). 4) The both ends disposed in the vicinity of 4) are connected to the slider rail (16) fixed to the machine frame (24), and are disposed at positions facing the roller (4). Further, the surface detection device (3) can be moved freely on the surface of the roller (4) in parallel with the roller axis by the driving device (17) disposed at the end of the slider rail (16). This is a possible embodiment.

Next, based on FIG. 5, FIG. 6, the structure and operation | movement of a grinding | polishing waste removal jig | tool (2) are explained in full detail. As shown in FIG. 5, the grinding dust removal jig (2) is, for example, a scrap removal that is an adhesive member having a hardness of 30 to 60 degrees on a shore hardness of 30 to 60 degrees on a metal base (12) or a base shaft (26). It is the structure which joined the member (13). Here, as the grinding scrap removing jig (2), when the base (12) and the scrap removing member (13) are both rectangular as shown in FIG. 5 (a), or as shown in FIG. 5 (b). (26) In some cases, the roll is formed of a polishing member (14).

Moreover, the grinding | polishing waste removal jig | tool (2) comprised by joining the scrap removal member (13) to the metal base (12) or the base shaft (26) is the vicinity of a roller (4), as shown in FIG. The fixing jig (23) installed on the slider rail (16) fixed at both ends to the machine frame (24) is arranged at a position facing the roller (4). . Moreover, the pressing member (15) exists in the upper part of the grinding waste removal jig (2) fixed to the fixing jig (23), and the grinding waste removal jig (2) is placed against the wiping roller (4). This mechanism can be pressed at a pressure of 0.1 MPa to 1.0 MPa. Further, the grinding dust removing jig (2) is freely moved on the surface of the roller (4) in parallel with the roller axis by the driving device (17) disposed at the end of the slider rail (16). Is a possible embodiment. The grinding scrap removal jig (2) is in contact with the roller (4) by the instruction from the control device (7) propagating to the pressing member (15) according to the data analyzed by the analysis device (8). Is appropriately controlled.

  Hereinafter, examples of the present embodiment will be shown and the present invention will be specifically described. However, the present invention is not limited to the following examples.

The grinding apparatus for a wiping roller of the present invention uses a laser displacement meter (for example, ST-3761 manufactured by Iwasaki Keiki Co., Ltd.) for the surface detection device (3), and also includes a reference value storage device (9) and a detection value storage device. (10) and the analysis device (8) having the comparison device (11), and the control device (7) using a sequencer (for example, KV-1000 manufactured by Keyence Corporation) and the pressing member (15). Uses an air cylinder (for example, CP61 manufactured by Konan Electric Co., Ltd.), the base shaft (26) as a roll-shaped aluminum material, and the polishing member (14) using a zirconia polishing cloth with a surface roughness Ra of 40 μm. The debris removal member (13) is an adhesive member obtained by adding dibutyl phthalate to a material containing nitrile rubber and vinyl chloride and processing to a shore hardness of 40 degrees. Each of the devices (17) uses a drive motor to instantaneously detect local wear on the surface of the wiping roller during operation of the printing machine, automatically grind the worn portion and remove grinding debris. Fixed irregularities.

  A series of flows in grinding of the wiping roller of the present invention will be described with reference to the process diagram shown in FIG. First, the degree of parallelism with respect to the axis of the wiping roller (4), the surface roughness with respect to the axis direction, the input of the reference value of the surface shape, and the scanning frequency of the laser displacement meter are set in advance. The scanning frequency of the laser displacement meter can be set arbitrarily, but in this embodiment, it is set for every 2,000 sheets printed.

When printing is actually started, the laser displacement meter as the surface detection device (3) scans the surface of the roller every 2,000 printed sheets, and detects the surface state of the wiping roller (4) each time ( STEP 1).

Next, the detected data is stored in the detection value storage device (10), and the sequencer compares the reference value set in the reference value storage device (9) with the comparison device (11), and the analysis device (8). Analysis is performed. The item to be analyzed is the time for applying the pressing force and the pressure necessary to identify the location where the abnormality has occurred and to resolve the abnormality that has occurred (STEP 2).

When it is determined from the analysis result that there is an abnormality occurrence location, an instruction is propagated from the control device (7) connected to the analysis device (8), the drive motor of the drive device (17) is operated, and the polishing jig (1) The grinding scrap removing jig (2) is moved to the location where the abnormality has occurred via the slider rail (16) and brought into contact with the surface of the wiping roller (4) by the pressing force of the air cylinder as the pressing member (15). Then grind the location where the abnormality occurred. At this time, the polishing jig (1) is in reverse contact with the rotation direction of the wiping roller (4). In this embodiment, the zirconia polishing cloth (14) as the polishing member of the polishing jig (1) is brought into contact with the wiping roller (4) for about 1 second at a pressing force of 1.0 MPa. In addition, the analysis result in an analyzer (8) is reflected about the pressing force at that time and the time which gives a press. (STEP3).

Further, the grinding waste generated when the wiping roller (4) is ground is provided behind the polishing jig (1), and is disposed at a position where the grinding waste can be removed before coming into contact with the intaglio plate surface (21). The scrap removing member (13) of the grinding scrap removing jig (2) is brought into contact with the wiping roller (4) with a pressing force of 0.6 MPa, and the scrap is removed by adhering to the scrap removing member (13). In the present embodiment, an adhesive member obtained by adding dibutyl phthalate to a material containing nitrile rubber and vinyl chloride and processing to a shore hardness of 40 degrees is used as the scrap removing member (13) (STEP 4).

The above steps are repeated for every 2,000 sheets printed during operation of the printing machine, and polishing and removal of grinding debris are performed each time irregularities appear on the surface of the wiping roller (4).

The above-described embodiments are merely representative examples, and it is needless to say that all embodiments exist within the scope described in the claims.

In the embodiment, the case where an abrasive cloth is used as the polishing member (14) is exemplified. However, naturally, when a grinding paper such as sandpaper which is easy to attach and remove is used, the roll base material is rough. Even when a polished grinding stone that has been processed is used, it can be easily estimated. In addition, the adhesive member to which the grinding dust has adhered is cleaned by a cleaning mechanism (not shown) so that it can be easily estimated when the adhesive member is used repeatedly or when the adhesive member is attached and replaced as a waste removing member (13). is there.

It is a cross-sectional schematic diagram of the wiping roller grinding apparatus of this invention. It is a cross-sectional schematic diagram of the polishing jig of the present invention. It is the schematic which shows the installation state of the polishing jig of this invention. It is the schematic which shows the installation state of the surface detection apparatus of this invention. It is a cross-sectional schematic diagram of the grinding dust removal jig of this invention. It is the schematic which shows the installation state of the grinding dust removal jig of this invention. It is process drawing of the wiping roller grinding method of this invention. It is the schematic which shows an example of a general intaglio printing machine. It is a cross-sectional schematic diagram of a general wiping device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polishing jig 2 Grinding waste removal jig 3 Surface detection device 4 Wiping roller 5 Cleaning member 6 Finishing blade 7 Control device 8 Analysis device 9 Reference value storage device 10 Detection value storage device 11 Comparison device 12 Base 13 Scrap removal member 14 Polishing member DESCRIPTION OF SYMBOLS 15 Pressing member 16 Slider rail 17 Driving device 18 Detection device 19 Impression cylinder 20 Intaglio cylinder 21 Intaglio plate surface 22 Inking plate 23 Fixing jig 24 Machine frame 25 Wiping tank 26 Base shaft

Claims (1)

A wiping roller grinding device for grinding an outer peripheral surface of the elastic layer of a wiping roller provided with an elastic layer made of a rubber material and / or a resin material around an axis of an axis, the outer peripheral surface of the elastic layer being A polishing jig that presses and grinds the polishing member against the outer peripheral surface, and a base that is located behind the polishing jig and that is removed by contact with grinding scraps that are ground by the polishing jig and the surface layer of the base The scrap removing member is disposed opposite to the grinding scrap removing jig, which is an adhesive member having a hardness of 30 to 60 degrees in Shore hardness, and the wiping roller. A wiping roller grinding device, comprising: a surface detection device that detects an uneven state of the surface of the wiping roller.

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