JP2014172228A - Sammeldruck printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Sammeldruck printing machine capable of preventing the occurrence of a printing trouble.SOLUTION: A Sammeldruck printing machine includes: a plurality of partial plate cylinders 20; a collection rubber cylinder 21 to be subjected to contact of the plurality of partial plate cylinders 20; a collection plate cylinder 22 to be oppositely contacted with the collection cylinder 21; a rubber cylinder 19 to be oppositely contacted with the collection plate cylinder 22; and an impression cylinder 18 to be oppositely contacted with the rubber cylinder 19. The Sammeldruck printing machine has such a cylinder arrangement that an angle α formed by a straight line Lconnecting the center of the rubber cylinder 19 and the center of the impression cylinder 18, and a straight line Lconnecting the center of the rubber cylinder 19 and the center of the collection plate cylinder 22 is an approximately 90 degrees.

Description

  The present invention relates to a zanmel printing machine in which occurrence of a printing failure is prevented.

  For printing of securities, intaglio, letterpress and lithographic printing methods are used in a complex combination for the purpose of preventing counterfeiting. Intaglio printing with delicate and sharp lines on portraits and face values, letterpress printing with easy-to-read sharp characters on serial numbers, and lithographic (offset) printing suitable for multicolor printing are used for the background pattern. . Further, Zammel printing, which is a special printing method, is adopted for part of the background pattern.

  In Zummel printing, inks of different colors are respectively applied to a plurality of partial plate cylinders, and then the ink on each partial plate cylinder is collected on the collective plate cylinder via the collective rubber cylinder, and then the rubber cylinder and the impression cylinder. It is a printing method that transfers to paper that passes between them. This Zammel printing has a feature that there is no misalignment even when the color is changed from the middle of the image line, so that the effect of preventing forgery is great.

  What is shown in FIG. 3 is a multicolor xammel printing machine disclosed in Patent Document 1. In this printing machine, three partial printing cylinders (Zammel pattern printing cylinder) 01, collective rubber cylinder (Zammel collective rubber cylinder) 02, collective printing cylinder (Zammel collective printing cylinder) 03, rubber cylinder 04, and impression cylinder 05 are provided. They are connected in this order. The image line on each partial plate cylinder 01 is transferred and integrated to the collective plate cylinder 03 via the collective rubber cylinder 02, and further from the paper supply device (not shown) via the rubber cylinder 04 via the swing. Are printed on the paper supplied between the pressure drum 05 and the pressure drum 05. The printed paper is conveyed from a delivery cylinder (not shown) to a paper discharge device. In FIG. 3, reference numeral 06 denotes an inking device.

No. 7-291

However, in the cylinder arrangement of the Zammel printing machine described in Patent Document 1, a straight line l ₁ connecting the center of the rubber cylinder 04 and the center of the impression cylinder 05, and the center of the rubber cylinder 04 and the center of the collective printing cylinder 03 are used. angle β of the straight line l ₂ connecting the bets are set to a relatively large angle exceeds 90 degrees.

  Therefore, when the leading edge of the sheet enters between the rubber cylinder 04 and the impression cylinder 05, the rubber cylinder 04 is slightly pushed up (receives a shock) in a direction away from the impression cylinder 05 (see arrow A in the escape direction). The pushed-up rubber cylinder 04 slightly pushes up the collective plate cylinder 03 (shock is transmitted from the rubber cylinder 04 to the collective plate cylinder 03).

  Thus, the printing pressure of the rubber cylinder 04 and the collective cylinder 03 is increased only when the rubber cylinder 04 is pushed up, and the printing pressure of the collective cylinder 03 and the collective rubber cylinder 02 is also increased only when the collective cylinder 03 is pushed up. It gets bigger. If the ink is transferred when the printing pressure changes, there is a problem that unevenness of the ink transfer occurs and printing trouble (shock eyes) occurs.

  Accordingly, an object of the present invention is to provide a zanmel printing machine in which the occurrence of a printing failure is prevented by adopting a cylinder arrangement configuration in which a shock generated between a rubber cylinder and an impression cylinder is difficult to be transmitted to a collecting plate cylinder. is there.

In order to achieve the above object, the Zummel printing press according to the present invention provides:
A plurality of partial plate cylinders, a collective rubber cylinder in contact with the plurality of partial plate cylinders, a collective plate cylinder in contact with the collective rubber cylinder, a rubber cylinder in contact with the collective plate cylinder, and in contact with the rubber cylinder In the Zummel printing press equipped with an impression cylinder,
The cylinder arrangement was such that the angle formed by the straight line connecting the center of the rubber cylinder and the center of the impression cylinder and the straight line connecting the center of the rubber cylinder and the center of the collecting plate cylinder was approximately 90 degrees. It is characterized by that.

  According to the Zammel printing press according to the present invention, even when the rubber cylinder is shocked, the cylinder arrangement is such that the shock is not easily transmitted to the collecting plate cylinder. There is no change in the printing pressure in the rubber cylinder, and no printing failure occurs.

1 is an overall configuration diagram of a Zummel printing press showing an embodiment of the present invention. It is explanatory drawing of the cylinder arrangement | sequence in a zanmel printing part. It is explanatory drawing of the cylinder arrangement | sequence in the conventional Zammel printing part.

  Hereinafter, the Zummel printing press according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an overall configuration diagram of a Zummel printing machine showing an embodiment of the present invention, and FIG.

  As shown in FIG. 1, a double-sided offset printing unit 12 is combined with a zummel printing unit 11 of the zummel printing machine of this embodiment. In other words, a paper feeding unit 10 as a supply unit that supplies sheets as sheets one by one, a Zammel printing unit 11, a double-sided offset printing unit 12, and a paper discharge unit as a discharge unit that discharges a sheet (not shown) are provided. Yes.

  On the downstream side of the sheet feeding unit 10 in the sheet conveyance direction, there is provided a swing 13 that is swingably supported and feeds the sheets one by one to the transfer cylinder 14, and downstream of the transfer cylinder 14 that is rotatably supported in the sheet conveyance direction. On the side, three transfer cylinders 15, 16, and 17 are rotatably supported in contact with each other.

  As shown in FIGS. 1 and 2, a pressure drum 18 is rotatably supported in contact with the transfer drum 17 on the downstream side of the transfer drum 17 in the sheet conveying direction. The impression cylinder 18 is provided with two notches 18a on the circumferential surface which are 180 degrees out of phase, and the notch 18a is provided with a gripping claw device for holding and holding paper.

  A rubber cylinder 19 is in contact with the impression cylinder 18 and is rotatably supported on the downstream side in the sheet conveyance direction from the position where the impression cylinder 18 contacts the transfer cylinder 17. The rubber cylinder 19 is provided with a notch 19a at one location on the circumferential surface, and the notch 19a is provided with a blanket holding device.

  A collecting plate cylinder 22 is in contact with the rubber cylinder 19 and rotatably supported on the upstream side in the rotation direction of the rubber cylinder 19 with respect to the contact position of the rubber cylinder 19 with the pressure cylinder 18. The collective plate cylinder 22 is provided with a notch 22a at one location on the circumferential surface, and the notch 22a is provided with a plate holding device.

  A collective rubber cylinder 21 is rotatably supported in contact with the collective plate cylinder 22 on the upstream side in the rotational direction of the collective cylinder 22 with respect to the place where the collective cylinder 22 contacts the rubber cylinder 19. Notches 21a are provided at three locations on the circumferential surface of the aggregate rubber cylinder 21 that are 120 degrees out of phase, and three blankets can be held by the blanket holding device provided on these notches 21a. Yes.

  Three partial plate cylinders 20 are rotatably supported in contact with the collective rubber cylinder 21 on the upstream side in the rotational direction of the collective rubber cylinder 21 with respect to the place where the collective rubber cylinder 21 is in contact with the collective plate cylinder 22. ing. An ink supply device 23 for supplying ink to each partial plate cylinder 20 is supported in contact with the partial plate cylinder 20.

  The pressure cylinder 18, the rubber cylinder 19, the collective plate cylinder 22, the collective rubber cylinder 21, the partial plate cylinder 20, and the ink supply device 23 constitute the Zummel printing unit 11.

In this embodiment, as shown in FIG. 2, in the cylinder arrangement in the Zammel printing unit 11, a straight line l ₁ connecting the center of the rubber cylinder 19 and the center of the impression cylinder 18, and the center of the rubber cylinder 19 and the collective plate The cylinder 22 is configured so that an angle α formed with a straight line l ₂ connecting the center of the cylinder 22 is approximately 90 degrees. In the illustrated example, the angle α is set slightly larger than 90 degrees.

  A pressure drum 24 is in contact with the pressure drum 18 and rotatably supported on the downstream side of the pressure drum 18 with respect to the rubber drum 19 in the sheet conveying direction. A rubber cylinder 28 is rotatably supported in contact with the impression cylinder 24 on the downstream side in the sheet conveying direction from a position where the impression cylinder 24 is in contact with the impression cylinder 18, and a plate cylinder 27 is rubber above the rubber cylinder 28. An ink supply device 26 is supported in contact with the plate cylinder 27 so as to be rotatable in contact with the cylinder 28. The ink supply device 26 includes two ink fountains 25a and 25b.

  The pressure drum 24, the rubber drum 28, the plate cylinder 27, and the ink supply device 26 constitute an offset printing unit 12a.

  A pressure drum 29 is rotatably supported in contact with the pressure drum 24 on the downstream side of the pressure drum 24 with respect to the rubber drum 28 in the sheet conveying direction. A rubber cylinder 33 is rotatably supported in contact with the impression cylinder 29 on the downstream side in the sheet conveying direction from a position where the impression cylinder 29 is in contact with the impression cylinder 24, and a plate cylinder 32 is rubber below the rubber cylinder 33. The ink supply device 31 is supported in contact with the plate cylinder 32 in contact with the cylinder 33 and rotatably supported. The ink supply device 31 includes two ink fountains 30a and 30b.

  The pressure drum 29, the rubber drum 33, the plate cylinder 32, and the ink supply device 31 constitute an offset printing unit 12b.

  In such a Zammel printing machine, the paper supplied one by one by the paper supply unit 10 is transferred to the impression cylinder 18 through the four transfer cylinders 14, 15, 16, 17 by the swing 13, and the rubber cylinder 19 It is conveyed to the contact point.

  At this time, in the Zammel printing unit 11, inks of different colors are respectively supplied from the three ink supply devices 23 to the three partial plate cylinders 20, and the ink supplied to the partial plate cylinders 20 passes through the collective rubber cylinder 21. It is transferred to the collecting plate cylinder 22. The ink transferred to the collective cylinder 22 is transferred to one side of the paper on the impression cylinder 18 through the rubber cylinder 19, whereby Zammel printing is performed on one side of the paper.

  Here, when the paper enters the contact portion between the impression cylinder 18 and the rubber cylinder 19, that is, the upstream end in the sheet conveyance direction of the notch 18a and the upstream end in the sheet conveyance direction of the notch 19a face each other. When the circumferential surface of the pressure cylinder 18 and the rubber cylinder 19 starts to come into contact with each other, the rubber cylinder 19 is shocked by a sudden pressure change. The direction of shock received by the rubber cylinder 19 is the normal direction (A direction) of the contact point between the pressure cylinder 18 and the rubber cylinder 19. In other words, the rubber cylinder 19 is shocked in the direction of being lifted by the thickness of the paper. In the present embodiment, since the above-described angle α is approximately 90 degrees, the shock is directed in the direction of the tangential line between the rubber cylinder 19 and the collecting plate cylinder 22. It is difficult to be transmitted to the collective cylinder 22.

  By the way, when the angle α is larger than 90 degrees, the collective plate cylinder 22 is disposed in the direction of the shock, so that the shock is easily transmitted to the collective plate cylinder 22.

  Accordingly, the printing pressure between the rubber cylinder 19 and the collective cylinder 22 is increased only when the rubber cylinder 19 is shocked, and the printing pressure between the collective cylinder 22 and the collective rubber cylinder 21 is also the rubber cylinder 19 and the collective cylinder 22. It increases only when the printing pressure increases. If the ink is transferred when the printing pressure changes between the cylinders, the ink transfer becomes uneven, resulting in a printing failure (shock eyes).

  Further, when the angle α is less than 90 degrees, the collective cylinder 22 is not disposed in the direction of the shock received by the rubber cylinder 19, so the rubber cylinder 19 does not transmit the shock to the collective cylinder 22. The printing pressure between the rubber cylinder 19 and the collecting plate cylinder 22 is lowered.

  Accordingly, the printing pressure between the rubber cylinder 19 and the collective printing cylinder 22 decreases only when the rubber cylinder 19 is shocked. If the ink is transferred when the printing pressure changes, the ink transfer becomes uneven, and printing is performed. Disability (shock eyes) will occur.

  However, in the present embodiment, the angle α described above is approximately 90 degrees, and the direction of shock received by the rubber cylinder 19 is not that the rubber cylinder 19 is directed toward the collective plate cylinder 22 and is not separated. Therefore, even if the rubber cylinder 19 receives a shock, the printing pressure does not change in the rubber cylinder 19 and the collective cylinder 22 and between the collective cylinder 22 and the collective rubber cylinder 21, and no printing failure occurs.

  After the end of Zammel printing, the paper is then transferred from the impression cylinder 18 to the impression cylinder 24 and passed between the impression cylinder 24 and offset printing is performed on the other surface. Is passed to the rubber cylinder 33 and offset printing is performed on one surface thereof.

  The paper that has been subjected to Zammel printing and offset printing on both sides is conveyed to a paper discharge section (not shown) and discharged.

  Needless to say, the present invention is not limited to the above-described embodiment, and various modifications such as changing the number of transfer cylinders, partial cylinders, and changing the cylinder arrangement are possible without departing from the scope of the present invention.

  Since the occurrence of printing failure is prevented, the Zammel printing press according to the present invention can be effectively applied to securities printing and the like.

DESCRIPTION OF SYMBOLS 10 Paper feed part 11 Zammel printing part 12 Double-sided offset printing part 12a Offset printing unit 12b Offset printing unit 13 Swing 14-17 Transfer cylinder 18 Impression cylinder 18a Notch 19 Rubber cylinder 19a Notch 20 Partial plate cylinder 21 Collecting rubber cylinder 21a Cutting Notch 22 Collecting plate cylinder 22a Notch 23 Ink supply device 24 Impression cylinder 25a, 25b Ink fountain 26 Ink supply device 27 Plate cylinder 28 Rubber cylinder 29 Impression cylinder 30a, 30b Ink fountain 31 Ink supply device 32 Plate cylinder 33 Rubber cylinder l ₁ Rubber cylinder centered straight line α angle connecting the center of the set plate cylinder and the center of the impression cylinder linear l ₂ blanket cylinder connecting the center of the

Claims (1)

A plurality of partial plate cylinders, a collective rubber cylinder in contact with the plurality of partial plate cylinders, a collective plate cylinder in contact with the collective rubber cylinder, a rubber cylinder in contact with the collective plate cylinder, and in contact with the rubber cylinder In the Zummel printing press equipped with an impression cylinder,
The cylinder arrangement was such that the angle formed by the straight line connecting the center of the rubber cylinder and the center of the impression cylinder and the straight line connecting the center of the rubber cylinder and the center of the collecting plate cylinder was approximately 90 degrees. Zummel printing machine characterized by that.

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