JP2006150941A - Ink arrangement device of printing machine and working method of ink arrangement device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink arrangement device of a printing machine, which can offer the highest printing quality, especially an offset printing machine. <P>SOLUTION: On the ink arrangement device 1 of the printing machine, especially the offset printing machine, one ink fountain roller 2, one ink distributing roller 5 and one vibrating roller 8 are equipped. The vibrating roller 8 is arranged so as to bring a rotatingly contact with the ink distributing roller 5. In addition, a transferring device 9 for transferring ink is equipped by realizing the synchronizing working together of the vibration roller 8 and the ink fountain roller 2. Further, the method concerning the ink arrangement device is dealt. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inking device of a printing machine, particularly an offset printing machine, which includes one ink discharge roller, one ink kneading roller, and one ink transfer roller.

An inking device of the kind described above is known from US Pat. The ink discharge roller assigned to the ink groove of the inking device cooperates with an ink transfer roller mounted so as to reciprocate. This ink transfer roller is applied with ink from the ink discharge roller, and performs ink kneading while reciprocating. Transfer ink to the rollers. Torque impacts that occur during printing are always a cause for high-quality printing, but this occurs because the rotation speed of the ink transfer roller and the ink discharge roller or ink kneading roller are different. This problem is particularly clearly seen in so-called shortened inking units, but because the number of rollers in the inking unit is small, it is corresponding to a small number of rollers that the thickness of the ink layer can be reduced or made uniform. It is because it is limited. Since the number of ink device rollers is small, the number of gap points for ink is also small, so that a thin ink layer thickness is required corresponding to the ink metering performed by the ink transfer roller.
German Patent No. 198 01 623

  The object of the present invention is to provide an inking device for a printing press, in particular an offset printing press, which can provide the highest print quality, in particular the present invention is a shortened which is particularly fast-responsive and preferably operated at very high speed. It can also be introduced into an inking device.

  In order to solve this problem, in the present invention, the ink transfer roller is always arranged so as to be in rotational contact with the ink kneading roller, and the ink transfer roller and the ink discharge roller can cooperate in synchronization. And by providing a moving device for transferring ink. Since the ink transfer roller is always in contact with the ink kneading roller, the peripheral speed of the ink transfer roller corresponds to the peripheral speed of the ink kneading roller, and there is no difference in the rotational speed. Therefore, no torque impact that adversely affects print quality occurs. Since the ink transfer roller is always in contact with the ink kneading roller, the ink transfer roller is driven at line speed. In order to temporarily perform synchronized ink transfer from the ink discharge roller to the ink transfer roller, the moving device moves the roller correspondingly. The moving device enables temporary cooperation between the ink transfer roller and the ink discharge roller, and can measure ink movement (ink streaks by the ink transfer roller).

  At this time, it is particularly considered that the moving device is a self-aligning bearing device, that is, the moving motion of the ink transfer roller is a reciprocating motion.

  Preferably, a self-aligning bearing device can be mounted to rotate about the axis of rotation of the ink kneading roller. As a result, the reciprocating motion of the ink transfer roller is performed around the rotation axis of the ink kneading roller, so that the relative position of the rotation shaft with respect to the ink transfer roller and the ink kneading roller does not change during the reciprocating motion of the ink transfer roller. As a result, the ink transfer roller can always contact the ink kneading roller and can also reciprocate to cooperate with the ink discharge roller.

  In one development of the present invention, a stopper device is provided between the jacket surface of the ink discharge roller and the jacket surface of the ink transfer roller to form a gap at a position where they are closest to each other. Therefore, the jacket surface of the ink transfer roller and the ink discharge roller is not in contact with the temporary ink transfer, and the ink layer existing on the ink discharge roller is transferred to the ink transfer roller with a layer thickness depending on the size of the gap ( It only approaches very close (ink streaks with ink transfer rollers). This avoids, on the one hand, torque impact between a relatively slow rotating ink take-off roller and a faster rotating ink transfer roller, and on the other hand, ink metering with a relatively thin ink layer thickness. This is particularly advantageous for a fast-acting shortening inking device.

  In one development of the invention, the stopper device is configured as an adjustable stopper device to adjust the size of the gap. The amount of ink transferred from the ink discharge roller to the ink transfer roller can be changed by adjusting the gap size. Thus, the current edge conditions and the desired print quality can be adapted without problems.

  The stopper device can be configured as a roller that rotates in contact with the ink discharge roller. As a result, it is possible to always keep a gap between the ink discharge roller and the ink transfer roller at the position where these rollers are closest to each other. This is because the rotation of the ink discharge roller is not a perfect circle or the ink discharge roller is This is because, even when it is not a perfect circle, the formed gap becomes constant by pressing the roller against the ink discharge roller. Therefore, a reproducible ratio is obtained.

  Since the self-aligning bearing device is preferably preloaded by the spring device in the direction toward the ink discharge roller, the spring force of the spring device is applied to the stopper, and the roller approach condition and the distance condition are always constant. It is constant.

  As described above, the present invention can be realized even in a normal inking device or in a shortened inking device having a small number of gap points in accordance with the small number of ink rollers.

  The present invention further relates to a method of operating an inking device of a printing press, in particular an offset printing press, comprising an inking roller, an inking roller, and an inking roller, wherein the inking roller is an ink transfer roller. The transfer roller is operated at the peripheral speed, and the speed is the same as the peripheral speed of the ink kneading roller. The ink transfer roller and the ink kneading roller are always operated in contact with each other. This is a method of temporarily cooperating for ink transfer. Thus, a ratio similar to that in the case of a continuous inking device exists between the ink kneading roller and the ink transfer roller. On the other hand, there is a ratio of an ink discharge roller type inking device between the ink transfer roller and the ink discharge roller. However, since it is desirable that the distance between the ink transfer roller and the ink discharge roller is smaller than the thickness of the ink layer on the ink discharge roller when the ink transfer roller is closest to the ink discharge roller, the ink transfer roller does not hit. This is because no mechanical contact occurs during ink transfer. This is particularly advantageous when the ink discharge roller rotates slowly and the ink transfer roller rotates fast (sliding ink transfer roller).

  The ratio of the ink transfer roller cycle of the ink transfer roller to the cycle of one revolution of the printing plate cylinder is preferably 1: 1 or approximately 1: 1. Since the ink transfer roller is always in contact with the ink kneading roller, the number of operations of the ink transfer roller that can realize a very high speed ink transfer roller cycle is relatively small. The ink transfer roller cycle of the conventional inking device is 1: 3, that is, the ink transfer roller makes one reciprocation while the printing plate cylinder is completely rotated three times, but this ratio is 1: 1 in the object of the present invention. it can. This so-called one-cycle ink transfer roller allows ink to be supplied from the ink groove of the inking device to the inking device roller device in each printing process, particularly in the case of a sheet printing machine, in the case of a sheet printing machine. Variations in ink thickness during the printing process can be reduced or prevented.

  In particular, the ink ejection rollers are driven individually and are not driven by the main drive of the printing press.

  It is possible to maintain or maintain a constant value by controlling or adjusting the rotation speed of the ink discharging roller, or to adapt to changing conditions.

  It is desirable that the ink streaks formed by the ink transfer roller formed at the time of ink transfer be kept constant or substantially constant even if the line speed of the printing machine changes.

  Further, the ink kneading roller and the ink transfer roller are desirably driven at the line speed of the printing press.

  In FIG. 1, the present invention is diagrammatically based on an embodiment, and FIG. 1 is a diagrammatic side view of an inking device of a printing press configured as an offset printing press.

  The drawing shows an inking device 1 of a printing press configured as an offset printing press. The ink discharge roller 2 cooperates with an ink groove 3 that stores ink 4 therein. The ink groove 3 has a doctor blade for each zone in order to perform ink film measurement for each zone. The ink discharge roller 2 has an independent drive unit (not shown) but is not driven by the main drive unit of the printing press.

  The inking device 1 further comprises an ink kneading roller 5, which cooperates with a number of inking rollers 6, some of which are in contact with one plate cylinder 7 of the printing press. Ink 4 is transferred to the printing plate wound there. The ink kneading roller 5 has the peripheral speed of the plate cylinder 7 like the other inking roller 6 that cooperates together.

  The inking roller shown as the ink kneading roller 5 can be implemented as an inking roller without an ink kneading drive. Also in this case, the plate cylinder 7 is driven at the peripheral speed.

  An ink transfer roller 8 is disposed between the ink discharge roller 2 and the ink kneading roller 5, and this performs ink transfer temporarily synchronized from the ink discharge roller 2 to the ink kneading roller 5. The ink transfer roller 8 is disposed on a moving device 9 configured as a self-aligning bearing device 10. This includes an ink transfer roller lever 11 having two arms assigned to the range of both ends of the ink transfer roller 8, and the rotation shaft 12 thereof coincides with the rotation shaft 13 of the ink kneading roller 5. The ink transfer roller 8 is attached to the arm of the ink transfer roller lever 11 adjusted in the same manner so as to be rotatable about the rotation shaft 14. The jacket surface of the ink transfer roller 8 and the jacket surface of the ink kneading roller 5 are always in rotational contact. The surface of the ink transfer roller 8 is made of a material that does not deform, such as steel or Rilsan, and the surface of the ink kneading roller 5 can be deformed, that is, is elastically configured. This surface is made of rubber, for example. The ink transfer roller 8 is driven at the line speed of the printing press.

  The mobile device 9 is driven in various ways. For this purpose, at least one of the other arms of the ink transfer roller lever 11 on the opposite side of the bearing of the ink transfer roller 8 is provided with a cam roller 15, which moves on the cam mechanism 16. To do.

  In the first embodiment, the cam mechanism 16 is disposed on one side. In this case, the ink transfer roller lever 11 is attached to a fixed shaft to which the ink transfer roller lever 11 is coupled so that it can swing in the ink kneading roller 5. The drive is performed via the cam mechanism 16 and the cam roller 15 of the ink transfer roller lever 11.

  In the second embodiment, one cam mechanism 16 for driving the ink transfer roller 8 is provided on both sides of the inking device. In that case, each ink transfer roller lever 11 is provided with a cam roller 15, which cooperates with the corresponding cam mechanism 16. In this case, the trouble of attaching a shaft for connecting the ink transfer roller lever 11 in the ink kneading roller 5 can be avoided.

  Each of the arms of the ink transfer roller lever 11 to which the ink transfer roller 8 is attached is provided with one roller 17, which is an eccentric bearing 18. These eccentric bearings 18 can adjust the position of the roller 17 with respect to the rotation shaft 14 of the ink transfer roller 8.

  The cam mechanism 16 is driven at line speed. In the self-aligning bearing device 10, a load is applied in advance in the direction of the arrow 20 indicated on the ink discharge roller 2 by the spring device 19, and the cam roller 15 is pressed against the cam mechanism 16.

  The rotation directions of several rollers of the inking device 1 are indicated by rotation arrows in the figure.

This creates the following features:
In the operation of the printing press equipped with the inking device 1, the self-aligning bearing device 10 periodically reciprocates around the rotating shaft 12 as the cam roller 15 moves on one or a plurality of cam mechanisms 16. As a result, the ink transfer roller 8 approaches and moves away from the ink discharge roller 2 synchronously. When the ink transfer roller 8 approaches the ink discharge roller 2, the roller 17 approaches the jacket surface 2 of the ink discharge roller 2. At this time, the position of the roller 17 is relative to the jacket surface of the ink transfer roller 8. And the ink discharge roller 2 can be adjusted so that the gap is maintained even when they are closest. With the eccentric bearing 18, this gap can be adjusted to 0.003 mm, for example. As a result, there is no mechanical rotational contact between the individually driven ink rotating roller 2 that rotates slowly and the ink transfer roller 8 that rotates faster than this, but the ink layer on the ink discharging roller 2 Since the thickness is larger than the size of the gap, the ink 4 existing on the jacket surface 2 of the ink discharge roller is transferred to the jacket surface of the ink transfer roller 8. Therefore, the thickness of the transferred ink layer can be determined by adjusting the gap. In this respect, the function of the sliding ink transfer roller is realized. The ink transfer roller 8 permanently transfers the ink to the ink kneading roller 5 like a continuous ink device, because these two rollers are always in rotating contact. The ink is transferred from the ink kneading roller 5 to other inking device rollers 6 and plate cylinders 7 in accordance with the adjustment of the ink profile. Therefore, during this operation, there is always a contact of the jacket surface between the ink transfer roller 8 and the ink kneading roller 5, but the ink transfer roller 8 and the ink discharge roller 2 approach only synchronously. Is done.

  Based on the present invention, excellent printing quality can be obtained even with a shortened inking device. Since the number of gap points is small in the shortened ink apparatus, the ink transfer roller apparatus of the present invention can realize the ink layer thickness that has already been thinly measured on the ink transfer roller 8. In particular, the width of the ink streak by the ink transfer roller can be set by controlling or adjusting the rotation speed of the ink discharge roller 2. In the ink layer thickness range on the ink discharge roller 2, only a range larger than the size of the gap between the ink discharge roller 2 and the ink transfer roller 8 is transferred. There is no mechanical contact between the ink discharging roller 2 that rotates slowly and the ink transfer roller 8 that rotates fast, so that the ink transferring roller does not hit. The ink transfer roller 8 is preferably about 0.2 mm away from the ink discharge roller 2. This distance achieved by one or more cam rollers 15 and one or more cam mechanisms 16 is so narrow that the ink transfer roller needs to be moved very little, so that the corresponding fast ink A transfer roller cycle is possible and can show a ratio of 1: 1 to one revolution of the plate cylinder 7 of the printing press. In order to keep the ink transfer angle with respect to the ink discharge roller 2 (ink streaks by the ink transfer roller) constant or substantially constant even if the line speed changes, each of the ink transfer roller levers 11 driven has two cam rollers 15 and It is desirable to have a cam mechanism 16 with two disk cams, the disk cams of the cam mechanism 16 being phase shiftable relative to each other, and changing the movement of the self-aligning bearing device 10 accordingly. Can do. Unlike the prior art, the ink transfer roller 8 does not operate in synchronization with the ink kneading roller 5 but is in permanent rotation contact, so that the time required for operation is not required, and this is used for ink transport. Therefore, the ink supply can be performed very uniformly. When the ink transportation is interrupted, the self-aligning bearing device 10 is fixed and the reciprocating motion 8 of the ink transfer roller is stopped. For this purpose, a stopper blade (not shown) is provided. The subject of the present invention is not limited to the geometric configuration of the inking device or the shortened inking device as seen from the figure, but can be applied to any inking device.

It is a schematic side view of an inking device of a printing press configured as an offset printing press.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inking apparatus 2 Ink discharge roller 3 Ink groove 4 Ink 5 Ink kneading roller 6 Inking apparatus roller 7 Plate cylinder 8 Ink transfer roller 9 Moving apparatus 10 Self-aligning bearing apparatus 11 Ink transferring roller lever 12, 13, 14 Rotating shaft 15 Cam roller 16 Cam mechanism 17 Roller 18 Eccentric bearing 19 Spring device 20 Arrow
s gap

Claims (17)

An inking device of a printing machine, in particular an offset printing press, in contact with a plate cylinder, an inking roller, an inking device roller driven at least at a peripheral speed of the plate cylinder, and an inking roller With
The ink transfer roller (8) is arranged so as to be always in rotational contact with the inking device roller (5), and the ink transfer roller (8) and the ink discharge roller (2) cooperate in synchronization. An inking device comprising a moving device (9) for transferring ink.   2. Inking device according to claim 1, characterized in that the moving device (9) is a self-aligning bearing device (10).   The ink according to claim 1 or 2, wherein the self-aligning bearing device (10) is mounted so as to be rotatable about the rotation shaft (13) of the inking device roller (5). apparatus.   4. A stopper device for forming a gap between the jacket surface (2) of the ink discharge roller and the jacket surface of the ink transfer roller (8) at a position where they are closest to each other. The ink apparatus according to claim 1.   The inking device according to any one of claims 1 to 4, wherein the stopper device for adjusting the size of the gap is configured as an adjustable stopper device.   The inking device according to any one of claims 1 to 5, characterized in that the stopper device is configured as a roller (17) rotating in contact with the inking roller.   7. Inking device according to any one of the preceding claims, characterized in that the roller (17) is configured as a roller mounted with an eccentric bearing.   The self-aligning bearing device (10) is preloaded in a direction toward the ink discharge roller (2) by a single spring device (19). The ink apparatus according to item.   9. The inking device according to claim 1, wherein the inking device is configured as a shortened inking device.   The inking device according to any one of claims 1 to 9, characterized in that the inking device roller (5) is configured as an ink kneading roller (5). A method of operating an inking device of a printing press, particularly an offset printing press, which is in contact with a plate cylinder and has one inking roller and at least one inking device roller driven at approximately the peripheral speed of the plate cylinder, Two ink transfer rollers,
The ink transfer roller (8) is operated at the peripheral speed of the ink transfer roller, the peripheral speed is the same as the peripheral speed of the inking device roller (5), and the ink transferring roller (8) and the inking device roller (5) are mutually connected. A method of operating an inking device, characterized in that the ink transfer roller (8) is always operated in contact with rotation and temporarily cooperates with the ink discharge roller (2) for ink transfer.   The ink transfer roller (8) is at a position closest to the ink discharge roller (2), and is maintained at a distance smaller than the thickness of the ink layer on the ink discharge roller (2) with respect to the ink discharge roller (2). The method according to claim 11.   A ratio between the ink transfer roller cycle of the ink transfer roller (8) and the cycle in which the printing plate cylinder (7) makes a complete revolution is 1: 1 or approximately 1: 1. 11. A method according to claim 11 or claim 12.   14. A method according to any one of claims 11 to 13, characterized in that the inking roller (2) is driven independently.   15. A method according to any one of claims 11 to 14, characterized in that the rotational speed of the inking roller (2) is controlled or adjusted.   16. The ink streak formed by the ink transfer roller formed at the time of ink transfer is kept constant or substantially constant even if the line speed of the printing machine is changed. The method according to item. The inking device roller (5) is configured as an ink kneading roller (5) driven by a reciprocating movement in the axial direction, and the ink kneading roller (5) and the ink transferring roller (8) are connected to the line of the printing machine. The method according to any one of claims 11 to 16, wherein the method is driven at a speed.

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