EP2117844B1 - Printing press and method for setting the position of its printing unit - Google Patents

Abstract

The present invention relates to a printing press having a printing unit (2) which has at least one roll (1) and an impression cylinder, wherein the roll (1) is mounted rotatably on a frame (5) on opposite sides (3, 4) by means of two bearings (6, 15) and wherein a setting apparatus (12, 26) is provided for setting the position of the roll (1) relative to the impression cylinder. Furthermore, the invention relates to a method for setting the position of the printing unit (2) of a printing press, in which at least one roll (1) of the printing unit (2) is oriented substantially parallel to an impression cylinder of the printing unit (2) by adjustment of the bearings (6, 15) on opposite sides (3, 4) of the roll (1). It is proposed to separate the setting of the position of the two bearing sides (3, 4) of a respective printing unit roll (1) from one another and to set first of all one bearing side (3) and then the opposite bearing side (4) one after another.

Description

The present invention relates to a printing press with a printing unit, which has at least one roller and a counter-pressure cylinder, wherein the roller is rotatably mounted on opposite sides by means of two bearings on a frame and wherein an adjustment for adjusting the position of the roller is provided relative to the impression cylinder. The invention further relates to a method for adjusting the position of the printing unit of a printing press, wherein at least one roller of the printing unit is aligned by adjusting the bearings on opposite sides of the roller substantially parallel to a counter-pressure cylinder of the printing unit.

When setting up a printing machine, but also after maintenance or repair work or retooling a printing press, such as a variable-format flexographic printing press, the rollers involved in the printing of the printing unit must be adjusted to each other. As a fixed point or fixed axis, with respect to which the rollers are adjusted, the impression cylinder is often taken, which offers itself especially in central cylinder machines with multiple printing units. On this basis, the rollers of the individual printing units are adjusted, so that all roller axes are aligned parallel to each other, in order to ultimately obtain a high-quality printed image.

For this purpose, the rollers are regularly used on their two sides in the respective camp and a bearing base plate as long as adjusted relative to the counter-pressure cylinder supporting machine frame via adjustment aids in the form of adjusting screws until the roller axes parallel to the Counter-pressure cylinders are aligned. This procedure is time consuming, complex and demanding.
A common adjustment device is for example in US 3986 454 A1 disclosed. On this basis, the present invention seeks to provide an improved printing machine of the type mentioned above and an improved method for adjusting the position of the printing unit of a printing press, avoid the disadvantages of the prior art and further develop the latter in an advantageous manner. Preferably, a shortened assembly time for the position adjustment of the printing unit rollers should be achieved.

According to the invention this object is achieved by a printing machine according to claim 6. In terms of process engineering, the stated object is achieved by a method according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

It is therefore proposed to separate the position adjustment of the two bearing sides of a respective printing unit from each other and successively first set the one bearing side and then the opposite bearing side. In particular, an angle adjustment is made on only one bearing side, while the opposite bearing side is adjusted only tangentially and / or radially to the impression cylinder. According to the invention, the adjusting device of the printing machine has separate position adjusting means for each of the two bearings of the at least one printing unit roller, by means of which the position of the bearings relative to each other and relative to the frame on which the printing unit roller is mounted, in at least one direction are adjustable transversely to the impression cylinder longitudinal direction. In procedural terms, the first bearing side is angularly adjusted in a first step such that the bearing is aligned with its axis of rotation as parallel as possible to the impression cylinder longitudinal axis, then in a second step, the second bearing side is adjusted in height such that the bearing on the second Bearing side together with the bearing on the first bearing side forms an aligned bearing axis parallel to the impression cylinder longitudinal axis. Through these successively running, different adjustment steps, the particular setting to be made considerably less complex and easier, whereby the desired overall orientation of the roller can be achieved considerably faster overall.

In a further development of the invention, the first step of the angular adjustment on the first bearing side considerably simplified when the roller is dismantled or at least not mounted in the bearing on the opposite second bearing side, so that the angle adjustment without obstruction by fixing on the opposite side of the roll are performed can. According to a preferred embodiment of the invention, in the first step, only one bearing plate, on which a bearing block carrying the bearing can be fastened, is aligned by angle adjustment parallel to the impression cylinder. The said bearing block can already be placed on the bearing plate, but advantageously also be dismantled from the bearing plate.

After the angle adjustment on the first bearing side of the bearing point is then adjusted accordingly height on the opposite second bearing side. For this purpose, an eccentric is advantageously used, which carries the bearing on the second bearing side. By turning the eccentric, the position of the bearing point on the said second bearing side can be adjusted very sensitively. In particular, exactly the height of the bearing point on the second bearing side can be adjusted relative to the bearing point on the first bearing side in order to give the roller inserted between the two bearing sides exactly parallel alignment with the impression cylinder longitudinal axis. In the height adjustment occurring by turning the eccentric offset in the radial direction with respect to the impression cylinder can be compensated in a subsequent process step by radial adjustment of the eccentric. Advantageously, in addition to the eccentric, the setting means on the second bearing side comprise a further movement axis radially relative to the impression cylinder longitudinal axis, so that the height adjustment and the radial adjustment on the second bearing side are decoupled from one another. This allows first an exact adjustment in the height direction be made without having to pay attention to an occurring adjustment in a direction perpendicular thereto. Once the exact height setting has been found, the radial position of the bearing point is adjusted, without having to pay attention to the height adjustment.

Advantageously, the adjusting means are assigned at least on the second bearing side clamping means in order to determine the respectively set position of the bearing and to be able to eliminate bearing clearance. In particular, in the invention, the above-mentioned eccentric a transverse to the axis of rotation of the eccentric locking means, for example in the form of a clamping screw, be assigned, by means of which the eccentric can be determined in the found position.

The adjusting means on the two sides of the bearing can basically be designed differently. In a further development of the invention, the adjusting means on the two bearing sides are designed differently from one another.

On the aforesaid first bearing side, the adjusting means may comprise height adjusting means and / or angle adjusting means for adjusting the height and / or the angular orientation of the bearing on said first bearing side. Advantageously, said adjusting means engage on the first bearing side between the frame and a bearing plate on which a bearing bracket carrying the bearing is longitudinally displaceably mounted. In this way, first, the position of the bearing plate can be adjusted in the desired manner, in particular be aligned exactly parallel to the impression cylinder. The bearing block carrying the bearing is advantageously mounted longitudinally displaceably on the bearing plate transversely to the longitudinal axis of the impression cylinder in order to deliver the roller to the impression cylinder or to be able to move away from it.

The adjusting means for the bearing plate may in particular comprise at least one adjusting screw, which is deliverable substantially perpendicular to the plane of the bearing plate in order to thereby adjust the position of the bearing plate in the desired manner. Advantageously, are from each other spaced several screws arranged to make sensitive in the desired manner, both a height adjustment of the bearing plate and an angular adjustment of the bearing plate can. The angular adjustment of the bearing plate is possible at least about an axis perpendicular to the longitudinal direction of the impression cylinder and / or the roller.

The adjustment means on the opposite second bearing side need not include Winkeleinstellmittel, although in principle may be provided on the second bearing side. In particular, the adjusting means on the second bearing side comprise as height adjusting means the aforementioned eccentric, which can be advantageously designed as an eccentric sleeve, in which the bearing of the second bearing side is accommodated. The eccentric can advantageously be rotated about an axis parallel to the roller axis eccentric axis in order to achieve the desired height adjustment of the bearing point.

In addition to the height adjustment means advantageously formed by the eccentric separate radial adjustment means for adjusting the position of the bearing are provided radially to the impression cylinder in the invention on the second bearing side. This Radialeinstellmittel may be formed in a further development of the invention of a linear guide, which is associated with a suitable adjusting means, for example in the form of an adjusting spindle.

Fig. 1

eine schematische Draufsicht auf eine Druckwerkswalze einer Druckmaschine sowie der sie tragenden Lageranordnung, der beidseitig der Walze Einstellmittel zur Lageeinstellung der Walze zugeordnet sind, nach einer bevorzugten Ausführung der Erfindung, und

Fig. 2

eine stirnseitige Seitenansicht auf die in Fig. 1 links dargestellte Lagerseite der Druckwerkswalze aus Fig. 1

The invention will be explained in more detail below with reference to a preferred embodiment and associated drawings. In the drawings show:

Fig. 1

a schematic plan view of a printing couple of a printing press and the bearing bearing assembly, which are assigned on both sides of the roller adjusting means for adjusting the position of the roller, according to a preferred embodiment of the invention, and

Fig. 2

a frontal side view of the in Fig. 1 Left side bearing side of the printing unit roller off Fig. 1

The present invention can basically be implemented in printing presses of various types, so that no specific printing press is completely shown in the figures. However, special advantages arise with format-variable flexographic printing machines.

FIG. 1 shows as a roll 1 of a printing unit 2, the format cylinder or the anilox roller of a flexographic printing press, which is rotatably mounted on opposite bearing sides 3 and 4 on a frame 5 about its longitudinal axis. On the first bearing side 3, which forms the drive side, the roller 1 is advantageously rotatably supported by a bearing 6 which is fixed to a bearing block 7. The bearing block 7 is mounted by means of a linear guide 8, which is formed in the illustrated embodiment as a double-rail track bed guide, longitudinally displaceable transversely to the roller longitudinal axis 9 on a bearing plate 10. The linear guide 8 allows a radial advancement of the roller 1 to a counter-pressure cylinder not shown specifically or a driving away of the roller 1 of this impression cylinder. The linear guide 8 is associated with an adjusting spindle 11 which acts between said bearing plate 10 and the bearing block 7.

Said bearing plate 10 is seated on the frame 5 and can be adjusted relative to this setting means 12 in the form of a plurality of screws 13. The aforementioned screws 13 engage substantially perpendicular to the plane defined by the bearing plate 10 at this and can move the bearing plate 10 relative to the frame 5. As indicated by the arrow 14, by adjusting the screws 13, a height adjustment, but in particular also an angular adjustment of the bearing plate 10 about a lying Winkeleinstellachse perpendicular to the plane of the FIG. 1 and thus also be effected perpendicular to the roll longitudinal axis.

On the opposite second bearing side 4, the roller 1 is rotatably supported by a bearing 15, which sits itself in a bearing carrier 16. As FIG. 2 shows, said bearing 15 is mounted on the bearing bracket 16 by an eccentric sleeve 17, in whose inner recess the bearing 15 is seated and which sits with its outer circumference in a bearing recess of the bearing bracket 16. The inner recess of the eccentric sleeve 17 is offset radially to the eccentric rotation axis 18, cf. FIG. 2 , If the eccentric sleeve 17 is rotated in the bearing recess 19 in the bearing carrier 16, as indicated by the arrow 20 in FIG FIG. 2 indicates, the bearing 15 undergoes a height adjustment perpendicular to the roll longitudinal axis. 9

The eccentric in the form of eccentric sleeve 17 is advantageously designed such that a bearing adjustment of the in FIG. 2 shown center position of at least 0.25 mm, advantageously from about 0.3 mm to 1 mm, both up and down is possible.

The eccentric sleeve 17 can be clamped in the respective adjusted position by clamping means 21, which advantageously act transversely to the eccentric rotation axis 18 in order to simultaneously eliminate a bearing clearance FIG. 2 shows, as clamping means 21, a clamping screw 22 may be provided by means of which the bearing recess 19 can be clamped together in the bearing bracket 16 to clamp the eccentric sleeve 17 in the bearing recess 19 radially. The bearing support 16 advantageously forms a slotted bearing eye, in which the eccentric sits and which can be clamped together by advancing the clamping screw 22, so that its diameter tapers.

As the FIGS. 1 and 2 show, the bearing support 16 can be delivered by radial adjustment means 23 transversely to the impression cylinder longitudinal axis on the impression cylinder and put away from it. In particular, a radial offset can be compensated by this separate Radialeinstellmittel 23, which occurs in the height adjustment by turning the eccentric. As FIG. 1 and 2 show, the bearing bracket 16 by a linear guide 24, which is formed in the embodiment shown as a single rail track bed guide, transverse to the roll longitudinal axis 9 along the horizontal linear guide axis relative to the frame 5 adjustable. The linear guide 24 is assigned an adjusting means 25 in the form of an adjusting spindle which engages between the frame 5 and the bearing bracket 16.

To adjust the position of the roller 1, the procedure is advantageously as follows: First, the bearing plate 10 is aligned exactly parallel to the longitudinal axis of the impression cylinder on the first bearing side 3. For this purpose, the screws 13 are adjusted accordingly until the desired orientation of the bearing plate 10 is found. In this case, the bearing block 7 may be placed on the bearing plate 10, but advantageously it may also be removed therefrom.

If the first bearing side 3 is angularly adjusted, the bearing 15 of the second bearing side 4 is first of all height-adjusted on the second bearing side 4 by turning the eccentric 17. The eccentric sleeve 17 is thereby rotated until the desired altitude is found and the bearings 15 and 6 lie on the two bearing sides 3 and 4 in a common height plane which is exactly parallel to the impression cylinder longitudinal axis. Then occurring by the rotation of the eccentric radial offset by the adjusting spindle 15, which is converted into a corresponding radial movement of the bearing support 16, balanced. As a result, finally, the bearing 15 comes into a position in which the bearing 15 and the bearing 6 on the two bearing sides 3 and 4 form an aligned bearing axis, which is aligned exactly parallel to the impression cylinder, so that between the two bearings 15 and 6 inserted pressure roller 1 is aligned parallel to the impression cylinder.

The set for height adjustment rotational position of the eccentric sleeve 17 has previously been frozen by tightening the clamping screw 22. LIST OF REFERENCE NUMBERS 1 roller 2 printing unit 3 bearing side 4 bearing side 5 frame 6 camp 7 bearing block 8th linear guide 9 roll axis 10 bearing plate 11 adjusting spindle 12 adjustment 13 screw 14 arrow 15 camp 16 bearing bracket 17 eccentric 18 Exzenterdrehachse 19 bearing recess 20 arrow 21 clamping means 22 clamping screw 23 Radialeinstellmittel 24 linear guide 25 actuating means

Claims (15)

1. Process for the adjustment of the position of the printing unit (2) of a printing press whereby at least one roller (1) of the printing unit (2) is mainly adjusted parallel to an impression cylinder by adjustment of the bearings (6, 15) to the sides of the valve (1) lying oppositely,
   characterized in that
   the two sides of the bearing (3, 4) are adjusted to position after each other, whereby at first in a first step a first side of the bearing (3) is angular adjusted in such a way that the bearing (6) on the first bearing side (3) is preferably arranged with its pivot parallel to the longitudinal axis of the impression cylinder, and afterwards in a second step the second bearing side (4) is height adjusted in such a way that the bearing (15) on the second bearing side (4) together with the bearing (6) on the first bearing side (3) creates an aligning bearing shaft parallel to the shaft of the impression cylinder.
2. Process according to the preceding claim,
   whereby first a support plate (10) onto which a bearing block (7) carrying the bearing (6) is mountable, is adjusted parallel to the shaft of the impression cylinder by angular motion.
3. Process according to the preceding claim,
   whereby the roller (1) is disassembled while the support plate (10) is angular adjusted.
4. Process according to one of the preceding claims,
   whereby as a second step an eccentric (17) carrying the bearing (15) at the second bearing side (4) is distorted.
5. Process according to one of the preceding claims,
   whereby the first bearing side and/or the second bearing side is jammed after the position adjustment.
6. Printing press with a printing unit (2) comprising at least a roller (1) as well as an impression cylinder whereby the roller (1) is rotatably supported on opposite sides (3, 4) by means of two bearings (6, 15) on a frame (5) and whereby an adjustment device (12, 26) for the adjustment of the position of the roller (1) relatively to the
   impression cylinder is provided,
   characterized in that
   the adjustment device for a first of the two bearings (6, 15) at the first side (3) of the roller (1) comprises of separate adjustment means (12) for the angular adjustment of only the first bearing (6) independent of the second bearing (15) at the other side (4) and alignment of the pivot of the first bearing parallel to the longitudinal axis of the impression cylinder, as well as for the second bearing (15) at the second side of the roller (1) separate means for the adjustment of height and radius (17, 24, 25) for the adjustment of height and radial position of only the mentioned second bearing (15) radial to the impression cylinder corresponding to the preset angular alignment of the first bearing (6) relatively to the first bearing (6) as well as relatively to the frame (5) in two vertical directions transverse to the first bearing (6) as well as relatively to the frame (5) in two vertical directions transverse to the longitudinal direction of the impression cylinder.
7. Printing press according to the preceding claim,
   whereby the adjustment means (12, 26) at the both bearing sides (3, 4) comprise of two adjustment pivots each.
8. Printing press according to one of the preceding claims,
   whereby the adjustment means (12, 26) at the both bearing sides (3, 4) are formed differently from each other and especially possess of different movement axis.
9. Printing press according to one of the preceding claims,
   whereby the adjustment means (12) at the first bearing side (3) takes effect between the frame (5) and a support plate (10), on which a bearing block (7) carrying the bearing (6) is supported longitudinally relocatable.
10. Printing press according to the preceding claim,
    whereby at least one adjustable screw (13) is arranged to the support plate (10) which is mainly lineable vertically to the basis of the support plate (10).
11. Printing press according to one of the preceding claims,
    whereby the adjustment means (26) at the second bearing side (4) comprise an eccentric (17) for the adjustment of the bearing position.
12. Printing press according to the preceding claim,
    whereby the eccentric comprises an eccentric jacket (17) which incorporates the bearing (15) of the second bearing side (4).
13. Printing press according to one of the preceding claims,
    whereby the adjusting means (26) at the second bearing side (4) comprise a linear adjustment for the alignment of the bearing (15) radial to the impression cylinder.
14. Printing press according to one of the preceding claims,
    whereby a clamping device (21) for the locking of the adjusted position is allocated to the adjustment means (12, 26) at the first and/or second bearing side (3, 4).
15. Printing press according to the preceding claim in connection with claim 8,
    whereby a clamping screw (22) is allocated to the eccentric (17).

Images