EP0974457A2 - Device and method for adjusting an inclination in a damping unit of a rotary offset printing press - Google Patents

Abstract

The two rollers (PN) are movably mounted in the printer (P). At least one link (7,8) which consist of a top (7) and bottom (8) tilting positioned piece is connected to the first and second roller and moves both rollers simultaneously by its movement. An adjusting element (10) is connected to the at least one link, and consists of a rotarily mounted arm on which is a spring piston (13,15).fitting into one of the holes (14) . A first and second tilting positioned rod (4) is joined to a link and roller each, and has a fine-adjustment screw head (20)

Description

The present invention relates generally to dampening systems in printing presses and especially one used in the dampening unit of web-fed rotary offset printing machines Tilt mechanism.

Damping units are used in web-fed offset printing machines of the prior art used a quantity of water mixed with a dampening solution towards the Apply and regulate the printing web. In Fig. 1, a printing unit P is one conventional web-fed offset printing press with an upper dampening unit UD and a lower dampening unit LD shown schematically. The dampening units UD and LD transfer water to the upper and lower pressure plates UP and LP, and from This will place the water on the top and bottom of the print Transfer web W. From the upper and lower pressure plates UP and LP is a colored image on the upper and lower blankets UB and LB and from these on transfer the top and bottom of a web W.

For webs with different widths, different must be used during printing Amounts of water are transferred to the surface of the web. It is known that by Inclination of an immersion roller relative to an adjacent bridge roller Dampening system the amount of water transferred from the dampening solution tank to the web can be regulated. This inclination of the dip roller causes the adjustment of the Dampening system to the amount of water required by the web of a given Width must be fed. If there is no change in the width of the web Adjusting the inclined position of the plunge roller can be disproportionate Amount of water z. B. on the middle of the web compared to the edges of the web get what can lead to poor print quality or web break.

2a and 2b show the upper dampening unit UD and the lower dampening unit LD Fig. 1, in which one end of the plunger roller PN relative to the bridge roller SL in a different position. In Fig. 2a there is one end the plunge roller PN relative to the bridge roller SL in a first position A, while in Fig. 2b one end of the plunger roller PN relative to the bridge roller SL in one second position B. In the devices shown in Figs. 1, 2a and 2b of the prior art, one end of the plunger roller PN can have any number of positions take relative to the bridge roller SL, because these positions by means of a in the following inclined rod RS can be set. As is known, a Dampening solution D, preferably water (with a dampening solution), by rotating the Dip roller PN is conveyed out of the dampening solution tank. The bridge roller SL transmits the dampening solution D from the dip roller PN to the dampening roller DV and this transfers the dampening solution D to the dampening roller DF, from where it then to the upper or lower pressure plate UP, LP arrives.

The steps for setting an inclined position in a lower dampening unit LD des The prior art is shown in FIGS. 3a-3d. In a first step by means of a wrench, an adjusting nut, not shown Tilt mechanism loosened by turning in one direction S1. By pressing the lock nut can set the entire tilt mechanism in a certain position be locked. In a second step, using the wrench R, a adjusting nut LN located on an inclined rod by turning it into a Loosened towards S2. By actuating the adjusting nut LN, the Tilting rod RS can be locked in a certain position. In a third Step is by means of the wrench R the tilt rod about its longitudinal axis rotated in a direction S3. (The direction S3 is for the purpose of illustration in Fig. 3c shown in another level). The rotation of the tilt rod RS to your The plunger roller PN moves in the longitudinal axis at an angle around the bridge roller SL. How known, the plunger roller PN is rotatably mounted on a support arm so that it is relative can perform an angular movement to the bridge roller SL. The RS tilt rod has a screw head BH on which the wrench R is attached with which the tilt rod RS is rotated, and turning the tilt rod RS in Active connection adjusted with a thread on the inclined rod RS the tilting rod RS inwards and outwards, so that the plunger roller PN in the to move the corresponding inclined position. Ultimately, the wrench R used in steps S4 and S5, the lock nut LN and the tilt rod to screw the adjusting nut of the sloping mechanism and thus the Lock the tilt mechanism in its newly set position. These setting steps are for the upper and lower dampening units UD, LD of each printing unit required.

The facilities and procedure for setting an inclined position in Damping of web rotary offset printing machines of the prior art require a number of steps to be performed manually by the machine operator need to change whenever the width of the web has changed or if it has changed other reasons, an adjustment of the inclined position in a dampening unit is necessary is. Because of the time it takes to take the steps to hire one The operator is often not inclined with every change in the web width possible to make a corresponding setting. It follows that too much or not enough water is transferred to the new track, which is bad Print quality or a web break.

It is desirable to be able to set an inclined position in dampening systems Rotary web offset printing presses reduce the time required while reducing the time To reduce machine downtimes and in particular to avoid such a setting is not carried out and therefore a disproportionate amount of water the web is transmitted. With the method and apparatus of the present Invention is the process of adjusting an inclined position in a dampening unit a web-fed rotary offset press or any other printing press significantly simplified and accelerated, thus reducing downtime. Hence the operator is able to make an accurate adjustment so that the correct amount of fountain solution is transferred to the web.

In the method and apparatus of the present invention, one or more connects several articulation pieces the tilt rods for the upper and lower dampening units of each printing unit. The hinge pieces ensure that by a single Movement of the operator setting an inclined position in the upper and lower Dampening takes place simultaneously. The hinge pieces are preferably with one end of a respective inclination bracket, which in turn is connected to an inclination rod of a respective upper and lower dampening unit. The tilt rod regulates the degree of inclination of an assigned dip roller. In this way the movement of the joint controls the inclination of the upper and lower Dip roller at the same time.

The movement of the joint piece can by the movement of a spring piston arm is connected to the joint piece or the joint pieces can be controlled. Which on the arm resilient piston can be spring biased and with the help of a Locking pin borehole arrangement set in different inclined positions and in these are locked. It can be assigned to the spring piston arm Web width indicators are used to guide the operator to correct skew caused for a certain web width. The tilt mechanism can also be Include fine adjustment mechanism with which minor adjustments of the Inclined positions can be made in the dampening systems, for. B. if one determined oblique position between the through the locking pin-borehole arrangement created inclined positions. This fine adjustment mechanism allows either an individual fine adjustment of an inclined position or a simultaneous Fine adjustment of all inclined positions in the dampening units.

The features of the present invention will become apparent in the following description preferred embodiments in connection with the accompanying, below listed drawings explained in more detail.

Fig. 1

einen schematischen Aufriß einer Druckmaschine des Standes der Technik mit einem oberen und einem unteren Feuchtwerk;

Fig. 2a und 2b

schematische Aufrisse der Feuchtwerke des Standes der Technik;

Fig. 3a, 3b, 3c, 3d

schematische Aufrisse eines Feuchtwerks des Standes der Technik, in denen die für eine Schrägstellung notwendigen Schritte dargestellt sind;

Fig. 4

einen schematischen Aufriß einer Druckmaschine mit der Schrägstelleinrichtung der vorliegenden Erfindung;

Fig. 5

einen detaillierten Aufriß einer ersten Ausführungsform der Schrägstelleinrichtung der vorliegenden Erfindung;

Fig. 5a

eine detaillierte Querschnittansicht einer Ausführungsform der Erfindung, die einen Feineinstellmechanismus zeigt;

Fig. 5b

ein detaillierter Aufriß der Ausführungsform der Fig. 5a;

Fig. 5c

eine detaillierte Querschnittansicht einer weiteren Ausführungsform der Erfindung mit einem Feineinstellmechanismus;

Fig. 5d

ein detaillierter Aufriß der Ausführungsform der Fig. 5c;

Fig. 6

eine detaillierter Aufriß einer zweiten Ausführungsform der Schrägstelleinrichtung der vorliegenden Erfindung.

Show it:

Fig. 1

a schematic elevation of a printing machine of the prior art with an upper and a lower dampening unit;

2a and 2b

schematic elevations of the dampening units of the prior art;

3a, 3b, 3c, 3d

schematic elevations of a dampening system of the prior art, in which the steps necessary for an inclination are shown;

Fig. 4

a schematic elevation of a printing machine with the inclination device of the present invention;

Fig. 5

a detailed elevation of a first embodiment of the inclination device of the present invention;

Fig. 5a

a detailed cross-sectional view of an embodiment of the invention showing a fine adjustment mechanism;

Fig. 5b

a detailed elevation of the embodiment of Fig. 5a;

Fig. 5c

a detailed cross-sectional view of another embodiment of the invention with a fine adjustment mechanism;

Fig. 5d

a detailed elevation of the embodiment of Fig. 5c;

Fig. 6

a detailed elevation of a second embodiment of the inclination device of the present invention.

4 is an overall schematic representation of the invention Inclination mechanism 1, which in a web-fed offset printing press P is used, the web W by means of an upper and lower pressure plate UP, LP and an upper and lower blanket UB, LB printed on both sides. Fig. 5 shows a detailed view of the tilt mechanism 1 of FIG. 4. How this from is known in the art, the plunger rollers PN are mounted so that they are relative can be adjusted angularly to the bridge rollers SL. The plunge rollers are attached at one end to inclined support arms 2, which are each Rotate the inclined rotary axes 3, which indicates the inclined position of the plunger rollers PN enables. The dip rollers PN transfer a dampening solution, preferably water (with a dampening solution), on dampening rollers DV, and from these the dampening solution on dampening rollers DF and then either on the upper or on the lower Transfer printing plate UP, LP.

One end of the inclined support arms 2 located opposite the axis of rotation 3 is rotatably connected with inclined rods 4. The respective tilt rod 4 is also connected to one end of an inclined rod bracket 5, which at one Axis of rotation 6 is rotatably attached. The other end of each Inclined rod bracket 5 has an upper and a lower joint piece 7, 8 rotatably connected. The joint pieces 7, 8 are on a common axis of rotation 9 a spring piston arm 10 rotatably connected. The spring piston arm 10 serves as a Adjustment element for the upper and lower joint piece 7, 8 and is on an axis of rotation 12 a stationary support 11 rotatably mounted. The located on the arm 10 Spring piston has a handle 13, a spring (not shown) and one Locking pin 15 on, and the operator uses the handle 13 to the To rotate the spring piston arm 10 about its axis of rotation 12.

The stationary support 11 can be a series of drill holes 14 along one of the Have rotational movement of the spring piston arm 10 certain arc. One yourself at that Spring piston locking pin 15 is received in one of the holes 14, so the position of the spring piston arm 10 and thus the inclined position of the Fix immersion rollers PN. Using a suitable spring (not shown), the Locking pin 15 of the spring piston in the direction of the fixed support 11 and corresponding borehole 14 are biased. The handle 13 is the Operator used to release the locking pin 15 against the force of the spring from the borehole 14 to draw. A series of markings located on the fixed support 11 or characters 16 can indicate the respective widths of a web that start with the Positions of the spring piston arm 10 are in line when the locking pin 15 in one of the boreholes 14 is received. An arrow or sage 17 on the Spring piston arm 10 can be used to move the spring piston arm 10 to one of the Align characters 16 and thus the correct position of the spring piston arm 10 for one to indicate certain web width.

Sometimes it may be necessary to fine tune the keystone Make dip roller PN that goes beyond the settings by moving of the spring piston arm 10 between the positions of the boreholes 14 are possible. To for this purpose, the tilt rods 4 of the present invention can be attached to a Have a fine adjustment screw head 20 at the end. This screw head 20 can using a suitable wrench (not shown) to secure itself to the rods 4 located thread are rotated so that the position of the tilt rods 4 down and adjust it here. This movement allows the dip rollers PN to be tilted in small steps or the fine adjustment of the plunger roller positions by Movement of the spring piston arm 10 between the boreholes 14 can be adjusted. This arrangement is similar to the inclination rod RS shown in FIGS. 3a-3d State of the art.

5a and 5b show an alternative embodiment of the Fine adjustment mechanism with the eccentric bushings 21 ', 21' 'on the respective upper one and lower joint piece 7, 8 are attached to the common axis of rotation 9. The Eccentric bushings 21 ', 21' 'have a center 24', which is from the center 25 ' a rotationally fixed shaft 22 'on which the eccentric bushings 21', 21 '' are mounted, deviates. The respective upper and lower joint pieces 7, 8 are on the Eccentric bushes 21 ', 21' 'attached and rotate with them around the shaft 22. With the respective eccentric bushings 21 ', 21' 'connected handles 27' 27 '' are from Operator used to the eccentric bushings 21 ', 21' 'and thus the upper or the lower To rotate joint piece 7, 8. To carry out a fine adjustment in the Embodiment of FIGS. 5a and 5b, the operator rotates the handles 27 ', 27' ', wherein the eccentric bushings 21 ', 21' 'rotate and the upper or lower inclined articulation piece 7, 8 are moved. This arrangement enables a separate one Fine adjustment of the inclined position of the upper and lower plunger roller PN.

An alternative embodiment of that shown in Figures 5a and 5b Fine adjustment mechanism is shown in Figures 5c and 5d. Here the Fine adjustment mechanism a simultaneous fine adjustment of the upper and lower Inclined joint piece 7, 8. In Figs. 5c and 5d is a single Eccentric bushing 21 used on the upper and lower inclined joint piece 7, 8 is attached to a common axis of rotation 9. The eccentric bushing 21 has a center 24 which is from the center 25 of the rotationally fixed shaft on which the eccentric bushing 21 is supported, deviates. The upper and lower inclined joint pieces 7, 8 are attached to the eccentric bushing 21 and rotate at the same time with the eccentric bushing 21 around the shaft 22. A handle 27 is with the Eccentric bushing 21 connected, which the operator uses when a fine adjustment 5c and 5d to be executed. So the operator turns it Handle 27, the eccentric bushing 21 rotates and the upper and move lower tilt joint piece 7, 8 at the same time. This arrangement allows one simultaneous fine adjustment of the upper and lower plunger roller PN with a single one Adjustment process carried out by the operator.

Fig. 6 shows an alternative embodiment of the inclination mechanism 1 'of present invention. 6 is the embodiment of FIG Fig. 5 similar, except that in Fig. 6, the spring piston arm 10 'vertically and not is mounted horizontally, the upper and lower inclined joint piece 7, 8 spaced axes of rotation 9 ', 9' 'are connected to the spring piston arm 10' and themselves the locking pin 15 is located at another location on the spring piston arm 10 '. Otherwise, however, is the construction and handling shown in FIG. 5c with FIG. 6 identical.

In the setting method according to the present invention, the printing press P first stopped by the operator to move a web W with a new width through the To guide machine P. Then the operator selects the appropriate skew by pulls the spring piston and thus the locking pin 15 out of one of the drill holes 14 (against the spring force) removed and the spring piston arm 10 or 10 'around the Rotation axis 12 rotates to a position at which the arrow or pointer 17 on the Spring piston arm 10 or 10 'to a corresponding sign 16 for the one to be used Web width is aligned. The locking pin 15 is also on the appropriate Drill hole 14 aligned. The operator then releases the spring piston and the Locking pin 15 enters the correct borehole 14 under the action of the spring force. While the spring piston arm 10 or 10 'is being moved about the axis of rotation 12 at the same time the inclined joint pieces 7, 8 moves, which is a simultaneous corresponding rotary movement of the inclined rod bracket 5 and a simultaneous corresponding linear movement of the tilt rods 4 triggers. The simultaneous Linear movement of the tilt rods 4 causes a simultaneous adjustment of the Inclined position of the dip rollers PN.

If in the embodiments of FIGS. 5 and 6 a fine adjustment of the If the inclined position of the dip rollers PN is desired, the operator uses one Wrench or other suitable tool to adjust the fine adjustment screw head 20 of the respective tilt rod 4 to rotate what a Linear movement of the tilt rod 4 and the adjustment of the inclined position assigned dip roller PN causes. This fine adjustment of the inclined position of the Dip rollers PN can be used for web widths in the setting process are not provided with the holes 14, or it can with the Boreholes 14 corresponding inclined positions of the plunger rollers PN be fine-tuned.

For fine adjustment by means of the fine adjustment mechanism of FIGS. 5c and 5d, the Operator handles 27 to allow simultaneous movement of the upper and lower To trigger inclined joint piece 7, 8, which is also a corresponding Rotational movement of the inclined rod bracket 5 and a corresponding linear movement the tilt rods 4 causes. The linear movement of the tilt rods 4 causes at the same time an adjustment of the inclined position of the dip rollers PN. This Fine adjustment can be used for the simultaneous adjustment of the inclined position of the Dip rollers PN are used for web widths that are used in the setting process the holes 14 are not provided, or those with the holes 14th corresponding inclined positions of the plunger rollers PN can be adjusted.

In the embodiment of FIGS. 5a and 5b, the operator turns the handle 27 'or 27 '' to rotate the eccentric bushing 21 'or 21' 'around the shaft 22', whichever is the Movement of the upper or lower inclined joint piece 7, 8, a corresponding rotary movement of one of the inclined rod brackets 5 and one corresponding linear movement triggers one of the inclined rods 4.

LIST OF REFERENCES

P

Printing press

UD

upper dampening system

LD

lower dampening system

UP

upper pressure plate

LP

lower pressure plate

W

train

UB

upper blanket

LB

lower blanket

PN

Dipping roller

SL

Bridge roller

RS

Incline rod

D

Fountain solution

DV

Dampening roller

DF

Dampening roller

R

Wrench

LN

Adjusting nut

bra

Screw head

A

first position of the dip roller PN

B

second position of the dip roller PN

S1

direction

S2

direction

S3

direction

S4

step

S5

step

1, 1 '

Tilt mechanism

2nd

Inclined support arm

3rd

Inclined axis of rotation

4th

Incline rod

5

hanger

6

Axis of rotation

7

Joint piece

8th

Joint piece

9

Axis of rotation

10th

Spring piston arm

11

stationary support

12th

Spring piston axis of rotation

13

Spring piston handle

14

Borehole

15

Locking pin

16

character

17th

Arrow or sage

20th

Screw head

21, 21 ', 21' '

Eccentric bushing

22, 22 '

rotatable shaft

24, 24 '

Center of the eccentric bushing 21, 21 '

25, 25 '

Center of the rotationally fixed shaft 22, 22 '

27, 27 ', 27' '

Handle

Claims (24)

Adjusting mechanism (1, 1 ') for a printing press (P), which comprises the following features: a first and a second roller (PN), which are movably mounted in the printing press (P); at least one joint (7, 8) which is connected to the first and the second roller (PN) and by the movement of which both rollers (PN) are moved simultaneously; and an actuating element which is connected to the at least one joint (7, 8) and moves it. Method for the simultaneous setting of two rollers (PN) in a printing press (P), comprising the following steps: movable storage of the two rollers (PN); Connecting at least one joint (7, 8) to the two rollers (PN); and Moving the at least one joint (7, 8), whereby the two rollers (PN) are moved simultaneously. Adjusting mechanism according to claim 1,
characterized,
that the at least one joint (7, 8) consists of an upper inclined joint piece (7) and a lower inclined joint piece (8). Adjusting mechanism according to claim 1,
characterized,
that an actuating element (10, 10 ') is also provided, which is connected to the at least one joint (7, 8) and moves it. Adjusting mechanism according to claim 4,
characterized,
that the actuator is a rotatably mounted arm (10, 10 '). Adjusting mechanism according to claim 5,
characterized,
that a spring piston (13, 15) is attached to the arm (10, 10 '). Adjusting mechanism according to claim 6,
characterized,
that a plurality of boreholes (14) are provided, and that the spring piston (13, 15) is fitted into one of the boreholes (14) in order to fix the position of the arm (10, 10 '). Adjusting mechanism according to claim 4,
characterized,
that at least one joint piece (7, 8) is rotatably connected to the actuating element (10, 10 '). Adjusting mechanism according to claim 5,
characterized,
that at least one joint piece (7, 8) is rotatably connected to the actuating element (10, 10 '). Adjusting mechanism according to claim 3,
characterized,
that an adjusting element (10, 10 ') is provided, with which the upper and the lower joint piece (7, 8) are connected. Adjusting mechanism according to claim 1,
characterized,
that further a first and a second inclination rod (4) are provided, and that the first inclination rod (4) is connected to the at least one joint (7, 8) and the first roller (PN) and the second inclination rod (4) to the at least one joint (7, 8) and the second roller (PN) is connected. Adjusting mechanism according to claim 11,
characterized,
that further a first and a second fine adjustment screw head (20) are provided, which are respectively mounted on the first and the second inclined adjustment rod. Adjusting mechanism according to claim 1,
characterized,
that a first and a second inclined support arm (2) are provided, that the first and second rollers (PN) are respectively located on the first and second inclined support arms (2), and that the inclined support arms (2) are rotatable. Adjusting mechanism according to claim 4,
characterized,
that at least one eccentric bushing (21, 21 ', 21'') is provided, which is connected to the at least one joint (7, 8) and the adjusting element (10, 10'), and that the at least one eccentric bushing (21, 21 ', 21'') adjusts the at least one joint (7, 8) relative to the adjusting element (10, 10'). Adjusting mechanism according to claim 3,
characterized,
that an actuator (10, 10 ') is provided which is connected to the upper and lower inclined articulation pieces (7, 8); and that at least one eccentric bushing (21, 21 ', 21'') is provided, which is connected to the upper and lower inclined articulation pieces (7, 8) and the actuating element (10, 10') and the upper and lower articulation pieces (7, 8 adjusted relative to the control element (10, 10 '). Adjusting mechanism according to claim 3,
characterized,
that an actuator (10, 10 ') is provided which is connected to the upper and lower inclined articulation pieces (7, 8); and that a first and a second eccentric bushing (21 ', 21'') are provided, the first eccentric bushing (21') with the upper inclined joint piece (7) and the actuating element (10, 10 ') and the second eccentric bushing ( 21 '') are connected to the lower inclined articulation piece (8) and the adjusting element (10, 10 ') and each adjust the upper and lower articulation piece (7, 8) relative to the adjusting element (10, 10'). Tilt mechanism in a dampening system of a printing press, which comprises the following features: an upper dampening roller (PN) and a lower dampening roller (PN); an upper and a lower inclined support arm (2), which are rotatably mounted and on which the upper and lower dampening roller (PN) are located; and at least one joint (7, 8), which is connected to the upper and the lower inclined support arm (2), a movement of the at least one joint (7, 8) simultaneously moving the upper and the lower inclined support arm (2) . Dampening inclination mechanism according to claim 17,
characterized,
that the at least one joint (7, 8) consists of an upper inclined joint piece (7) and a lower inclined joint piece (8). Dampening inclination mechanism according to claim 17,
characterized,
that an adjusting element (10, 10 ') is connected to the at least one joint (7, 8) and moves it. Dampening inclination mechanism according to claim 19,
characterized,
that at least one eccentric bushing (21, 21 ', 21'') is provided, which is connected to the at least one joint (7, 8) and the adjusting element (10, 10') and the at least one joint (7, 8) relative adjusted to the actuator (10, 10 '). Dampening inclination mechanism according to claim 18,
characterized,
that an adjusting element (10, 10 ') and at least one eccentric bushing (21, 21', 21 '') are provided, and that the at least one eccentric bushing (21, 21 ', 21'') with the upper and the lower inclined Articulated piece (7, 8) and the adjusting element (10, 10 ') is connected and the upper and lower inclined articulating piece (7, 8) is adjusted relative to the adjusting element (10, 10'). Dampening inclination mechanism according to claim 18,
characterized,
that an adjusting element (10, 10 ') and a first and a second eccentric bushing (21', 21 '') are provided, the first eccentric bushing (21 ') with the upper inclined joint piece (7) and the adjusting element (10, 10 '), and the second eccentric bushing (21'') are connected to the lower tilting joint piece (8) and the adjusting element (10, 10') and the eccentric bushings (21 ', 21'') the upper and the lower tilting position - Adjust the joint piece (7, 8) relative to the control element (10, 10 '). The method of claim 2, comprising the further steps of: Connecting a rotatably mounted adjusting element (10, 10 ') to the at least one joint (7, 8); and Moving the at least one joint (7, 8) by turning the adjusting element (10, 10 '). The method of claim 2, comprising the further steps of: Providing an actuator (10, 10 ') and an upper and lower inclined joint piece (7, 8), the upper inclined joint piece (7) with the first roller (PN) and the lower inclined joint piece (8) with the second roller (PN) is connected; and wherein a first eccentric bushing (21 ') with the upper tilting joint piece (7) and the first roller (PN) and a second eccentric bushing (21'') with the lower tilting joint piece (8) and the second roller (PN) connected is; Moving the first roller (PN) relative to the actuating element (10, 10 ') by rotating the first eccentric bushing (21'); and Moving the second roller (PN) relative to the actuating element (10, 10 ') by rotating the second eccentric bushing (21'').

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