EP1075943A1 - Printing device - Google Patents

Abstract

The printing unit has several cylinders adjustable in relation to each other on guide elements in the form of straight guide rails, and each possessing its own drive motor. At least one of the cylinders is a form cylinder (11,12). Each guide element for a form cylinder extends as far as an extra appliance (25,26) as ink and or damping unit. The guide elements determining the paths of the carriages (8,9) for the outer cylinders (2,3) and the guide elements (13,14) determining the paths of the carriages (7,10) for the inner cylinders (4,5) slope in relation to each other.

Description

The invention relates to a printing unit for a web-fed rotary printing press with several, each adjustable on guide elements, one each own drive motor having printing unit cylinders, of which at least one is a forme cylinder.

The invention has for its object a generic printing unit To be designed so that each forme cylinder with simple means and high Precision in contact with an auxiliary device required for printing is feasible.

According to the invention this is achieved by applying the measures of Claim 1 reached.

Figur 1

eine Seitenansicht eines ersten Ausführungsbeispiels,

Figur 2

einen teilweisen Schnitt durch die Mittel zur Führung und Anstellung eines Druckwerkszylinders,

Figur 3

ein zweites Ausführungsbeispiel,

Figur 4

ein drittes Ausführungsbeispiel und

Figur 5

ein letztes Ausführungsbeispiel jeweils in einer der Figur 1 entsprechenden Darstellung.

Further features and advantages of the invention result from the subclaims and the description of some exemplary embodiments with reference to the drawing. In the drawings show schematically

Figure 1

a side view of a first embodiment,

Figure 2

a partial section through the means for guiding and adjusting a printing unit cylinder,

Figure 3

a second embodiment,

Figure 4

a third embodiment and

Figure 5

a last embodiment in each case in a representation corresponding to Figure 1.

Figure 1 shows a printing unit with a machine frame support 1 and four Printing unit cylinders, of which the two outer forme cylinders 2, 3 and are the two inner transfer cylinders 4, 5, between which one Printing material web 6 passes through, which is printed on both sides. Everyone who Printing unit cylinder 2 to 6 is rotatably mounted in a carriage 7 to 10. Each of the carriages 7 to 10 takes a drive motor, not shown for a printing unit cylinder. Such drive motors are from the parallel applications with the internal file numbers PB 04350 and PB 04351 removable.

Guide elements 11 to 14 are for guiding each slide 7 to 10 intended. The guide elements 11, 12 on the one hand and 13, 14 on the other hand each parallel to each other. Besides, they are Guide elements 11, 12 opposite the guide elements 13, 14 inclined, i.e. arranged with a different direction. in the illustrated example, the printing material web 6 runs horizontally. It would be but also a concept rotated by 90 ° for a vertical course of the Lane 6 conceivable. This also applies in principle to the other examples and Variants.

As FIG. 2 shows, the guide element 12 comprises two straight lines mutually parallel guide rails 15, 16 which are fixed to one Wall 17 of the machine frame support 1 are attached. The wall 17 extends perpendicular to one of the end face 18 of the Printing unit cylinder 3 level. Via each guide rail 15 or 16, which advantageously have a dovetail cross-section can, a slide shoe 19, 20 engages each. The slide shoes 19, 20 are firmly on assigned slide 9 attached.

To adjust the printing unit cylinder 3, the carriage 9 takes one in Fiugr 2 indicated at 21a threaded nut into which a threaded spindle 21 engages. The threaded spindle 21 is rotatable but axially immovable mounted on the machine frame support 1. On the threaded spindle 21 is a Gear 22 placed on a gear, for example in the form of a Belt drive 23 from a motor 24, advantageously an electric one Actuator that is driven. The motor 24 is also fixed on Machine frame support 1 connected. By rotating the Threaded spindle 21, the carriage 9 will be along the guide element 12 forming guide rails 15, 16 moves. The other sledges 8, 10 and 11 are guided and driven in the same way.

As can further be seen in FIG. 1, the guide elements 13, 14 are for the Carriage 7 and 10 of the inner printing cylinder 4 and 5 in parallel, spaced from each other. Weird to the Guide elements 13, 14 of the inner printing cylinder 4, 5 extend the guide elements 11, 12 for the carriage 8, 9 of the outer Printing unit cylinders 2, 3. The guide elements 11, 12 run here also in parallel, spaced apart planes. The Directional deviation between the guides 11, 14 and 12, 13 is through indicated the angle α. The direction of the guide elements 11, 12 stop movements of the outer printing cylinder 2, 3 have hence an upward or downward component that gets smaller, if the angle α between the guide elements 11, 14 or 12, 13 decreases. The height of the printing unit shown in Figure 1 with about horizontal passage of the printing material web 28 can therefore be minimized become. If the printing unit runs vertically through the Printing material web is used, the width of the printing unit be minimized.

If the printing unit cylinders 2 to 5 are not to be stored on the fly, at the other end of the cylinder is a similar machine frame support to arrange. Such an arrangement is in the parallel Patent application with the internal file number PB 04350 described.

As can further be seen in FIG. 1, the range of the Transfer cylinders 4, 5 facing ends of the guide elements 11, 12 each as an additional device, an imaging device 25, 26 arranged. The guide elements 11, 12 extend to the Imaging equipment. The imaging devices 25, 26 are here firmly connected to the machine frame support 1. The guide elements 11, 12 have a double function, namely once the forme cylinder 2, 3 to the transfer cylinders 4, 5 to start printing and the other the forme cylinders 2, 3 when hired to the imaging devices 25, 26 to guide, the arrangement being expediently such that the Forme cylinder 2,3 with respect to the imaging device in the Imaging direction, that is, working direction can be moved. As a result the straightforward design of the guide elements can be done with little Manufacturing effort a high level of guidance accuracy can be achieved.

However, it would also be conceivable to open the imaging devices 25, 26 record slides movable along guide elements, so that the imaging devices 25, 26 each assigned Forme cylinders can move in the opposite direction and vice versa, the arrangement It is expedient to ensure that the forme cylinder 2, 3 with respect to the Imaging device 25, 26 in its imaging direction and / or the Imaging device 25, 26 with respect to the associated forme cylinder 43 can be moved in the direction of its movement. Are expedient each forme cylinder and the associated imaging device the same guide elements, here 11, 12, assigned, whereby automatically give the directions mentioned above.

Figure 1 shows the printing unit cylinders in the print-on position. For Transfer to the print-down position or the imaging position the forme cylinders 2, 3 along their guide elements 11, 12 to the outside guided. Then the transfer cylinders 4, 5 up and down shifted until all printing unit cylinders are lifted apart. At the outer end of the adjustment paths of the forme cylinders 2, 3 then get into Contact with the imaging devices 25 arranged here in a stationary manner, 26.

Printing unit cylinders 2 to 5 can also be used against printing unit cylinders smaller diameter can be replaced. The further the angle α on 180 ° is approximated, the easier it is while maintaining the existing carriage or one and the same machine frame support possible. Where this is no longer due to large diameter differences goes, a correspondingly adapted machine frame carrier and / or appropriately adapted slides are used. With the same The carriages assigned to the outer cylinders remain on the rack definitely the same.

The printing unit according to FIG. 3 also has four printing unit cylinders, namely two forme cylinders 30, 31 and two transfer cylinders 32, 33, each on a carriage 34 to 37 receiving a drive motor are rotatably mounted. The slides 34, 35 are V-shaped here straight guide elements 38, 39 converging toward one another. For the sled 36, 37 are aligned, straight Guide elements 40, 41 at a distance from the top of the V-shaped converging guide elements 38, 39 are provided. All Guide elements are in turn perpendicular to the end faces of the Printing unit cylinder 30, 31, 36, 37 extending walls 42, 43, 44 of the Machine frame support 45 is provided. The present arrangement offers the advantage that only three walls 42, 43, 44 have to be machined.

The guide elements and the drive for adjusting the slide 34 to 37 are formed in the same way as in the first exemplary embodiment. In the area the outer ends of the guide elements 38, 39 each have a laser imaging device 46, 47 fixed to the machine frame support 45 appropriate. Each laser beam 48, 49 is parallel to that Guide elements 38, 39 for the forme cylinders 30, 31 and in the direction of directed the axis of these cylinders. This facilitates the exchange of the Printing cylinder against others with a different diameter, i.e. under Maintaining the machine frame support 45 and the slides 34 to 37 the printing unit can also be used with printing unit cylinders 50 to 53 smaller Diameter.

In this embodiment too, the forme cylinders 30, 31, starting from the shown print-on position Displacement of the slides 34, 35 to the outside in the imaging position be transferred without the need for further adjustment movements. In this example too, the imaging devices 46, 47 arranged stationary. But also a movable arrangement, as in the above In connection with Figure 1 already mentioned, would be conceivable.

The four-cylinder printing unit according to FIG. 4 has one Machine frame support 60, in which a straight, about parallel to the run of the printing substrate web 77, which is guided horizontally here running, thus also horizontal in the example shown extending guide element 61 for a carriage 63 a Forme cylinder 65 is provided. In the lower part of the Machine frame support 60 is a guide element 62 for a carriage 64 of a forme cylinder 66. Both guide elements 61, 62 run parallel. Taking advantage of just a little bit of a right one Different angles are between the guide elements 61, 62 two straight, spaced parallel planes Guide elements 67, 68 for carriages 69, 70 of the transfer cylinders 71, 72 provided. The directions of the guide members 61, 62 and 71, 72 are thus at an angle to each other.

In the upper area of the machine frame support 60 there is still one Imaging device 73 permanently installed, with which the forme cylinder 65 by moving his carriage 63 to one end of the Guide element 61 can be brought into contact. Here, the Forme cylinder 65 from the transfer cylinder 71 at the same time. On the Guide element 61 can also be moved an inking unit 74, which in the The pressure-on position shown in FIG. 4 against the forme cylinder 65 is employable. In the same way, before one end of the Guide element 62 fixed to the machine frame support 60 a Imaging device 75 and displaceable on the guide element 62 an inking unit 76 is arranged. The imaging device 75 and the Inking unit 76 cooperate with the forme cylinder 66.

For transferring the printing unit cylinders of each printing unit to the print-down position are the forme cylinders 65, 66 towards the first Imaging devices 73, 75 move. At the same time, the Inking units 74, 76 are moved in the opposite direction to make room for them apart to be moved transfer cylinders 71, 72 to create. In this position sleeves can be changed on the forme cylinders 65, 66 when the printing couple cylinders on the machine frame support 60 are on the fly. Are the printing unit cylinders on both ends at each guided a machine frame carrier, one of them is for example to fold or drive away, as in the parallel application with the internal file number PB 04350.

In the present printing unit, the guide elements 61, 62 take over three Functions, namely the on and off of the forme cylinders 65, 66 from the transfer cylinders 71, 72, on the other hand the guidance of the Forme cylinders 65, 66 when engaging with the Imaging devices 73, 75 and finally the leadership of the Inking units 74, 76.

Although here also the imaging devices 73, 75 in the illustrated Example are firmly arranged, so there would be the Possibility of these devices as well as the inking units 74, 76 slidably advantageous even up to these additional devices extending guide members 61, 62, as above in others Connection has already been indicated. Also for the directions of the in this case, the above statements would apply to the respective movements.

In the exemplary embodiment according to FIG. 5, the slides 80, 81 are for the Forme cylinders 82, 83 on straight, aligned with each other Guide elements 84, 85 added to a wall 86 of the Machine frame support 87 are firmly connected. At a opposite wall 88 are parallel to the guide elements 84, 85 further aligned guide elements 89, 90 for slide 91, 92 of the transfer cylinders 93, 94 attached.

Of course, it would also be conceivable for the Guides for one forme cylinder and not with it to arrange cooperating transfer cylinders, e.g. at the Wall 86 the guides 84 and 90 and on the wall 88 the Guided tours 85 and 89.

Above the forme cylinder 82 and below the forme cylinder 83 are each an imaging device 95, 96 attached. These can be fixed on Machine frame 87 may be attached. In such a case, the Forme cylinders 82.83 on the guides 84.85 to the Imaging device 95,96 drove, the distance alone is overcome by this movement. The guides 84.85 are there executed accordingly long. But it would also be conceivable that Imaging devices 95,96 to be arranged so that they can be moved can be moved to the forme cylinders 82, 83, as in FIG Directional arrows are indicated. For this, the Imaging devices e.g. be taken on your own sledge, that can be moved on your own tours or on tours 84.85 can. Another possibility would be the imaging devices 95.96 on assigned telescopic cylinders attached to the machine frame etc. to record.

With regard to the directions of movement, the same applies as above. In any case an arrangement such that the forme cylinder with respect to the assigned imaging device in their imaging direction and / or the imaging device relative to the assigned one Forme cylinder is or can be moved in the direction of movement.

The arrangement according to FIG. 5 is characterized by a simple structure because only two parallel walls of the machine frame support 87 are to be processed.

As can further be seen in FIG. 5, the machine frame carrier 87 can also printing unit cylinders 97 to 100 are used, the smaller one Diameter. The carriages 80, 81 for the forme cylinders can thereby unchanged because the optical axis of the Imaging devices 95, 96 and the axis of each assigned Forme cylinders 82, 83 lie in one plane and the other Relative movement runs in the direction of the illustration. For the In contrast, printing unit cylinders 98, 99 are higher in the example shown Used sled. The machine frame support (s) can to be kept. However, the present structure offers the possibility that the diameter of the cylinders and therefore the format within a Greater range can be varied without the sled for the inside Need to replace cylinders.

The above explanations show that only one guide is required there is a high degree of format variability.

An additional device required for printing could also be a Combined ink dampening unit or just a dampening unit for offset printing Find use.

As the above description shows, the invention is not limited to that illustrated embodiments limited. In particular, it is possible instead of an approximately horizontal path, an approximately vertical one To provide the course of the path. For this purpose, the guide elements are simply in one position rotated by 90 °.

Claims (17)

Printing unit for a web-fed rotary printing press with a plurality of printing unit cylinders, each of which has its own drive motor, of which at least one is a forme cylinder, which can be adjusted with respect to one another by guide elements, characterized in that each guide element for a forme cylinder (11, 12, 38, 39, 61, 62, 84) , 85) extends up to an additional device (25.26, 46.47.73 to 76, 95.96) required for printing. Printing unit according to claim 1, characterized in that the additional device is an imaging device (25.26, 47.47, 73.75, 95.96). Printing unit according to claim 1 or 2, characterized in that the additional device is an inking and / or dampening unit (74, 76). Printing unit according to one of the preceding claims, characterized in that the forme cylinder (for example 2, 3) can be moved on the guide element (for example 11, 12) against the fixedly arranged additional device (for example 25, 26). Printing unit according to one of the preceding claims, characterized in that the additional device (74, 76) can be moved up to the forme cylinder (63, 64) on a guide element (61, 62). Printing unit, in particular according to one of the preceding claims 1 - 3 and 5, characterized in that the additional device can be moved in its direction of movement with respect to the respectively associated forme cylinder (11, 12, 38, 39, 61, 62, 84, 85). Printing unit according to one of the preceding claims, characterized in that the forme cylinder (11, 12, 38, 39, 61, 62, 84, 85) can be moved in the working direction of an associated additional device, in the case of an imaging device in the direction of its imaging Printing unit according to one of the preceding claims 5-7, characterized in that the additional device (74, 76) can be moved on the same guide element (61, 62) as the associated forme cylinder (63, 64). Printing unit according to one of the preceding claims, characterized in that the guide elements (for example 12) are designed as straight guide rails (15, 16). Printing unit according to one of the preceding claims, characterized in that the guide elements (11) which determine the adjustment paths of the slides (8,9,34,35,63,64) for the outer printing unit cylinders (2,3,30,31,64,65) , 12,38,39,61,62) and the guide elements (7,10,36,37,69,70) which determine the travel of the carriages for the inner printing unit cylinders (4,5,32,33,71,72) 13, 14, 40, 41, 67, 68) are arranged at an angle to one another. Printing unit according to one of the preceding claims, characterized in that the printing unit cylinders (2-5; 65.66.67.68; 82.83.93.94) in slides (7-10; 63.64.69, 70; 80 81,91,92) are mounted, the guides (11-4; 61,62,67,68; 84,85,89,90) being arranged opposite one another in parallel on at least one machine frame support. Printing unit according to Claim 11, characterized in that two transfer cylinders (93, 94) are arranged on one wall (88) and two forme cylinders (82, 83) on an opposite wall (86) of at least one machine frame support (87). Printing unit according to claim 11, characterized in that the guide elements for the carriage of adjacent printing unit cylinders (82,93,94,83) are alternately attached to the two walls (86,88). Printing unit according to claim 11 , characterized in that the guide elements (61, 62) for the outer printing unit cylinders (65, 66) run approximately parallel to the printing material web (77) carried out between the inner printing unit cylinders (71, 72). Printing unit according to claim 10 , characterized in that the guide elements (11, 12, 38, 39) of the carriages (8, 9, 34, 35) for the outer printing unit cylinders (2, 3, 30, 31) are arranged in a V-shape. Printing unit according to claim 15, characterized in that the guide elements (40, 41) for the inner printing unit cylinders (32, 33) are arranged one behind the other in alignment. Printing unit according to one of the preceding claims, characterized in that the rectilinear guide elements (for example 15) are attached to a wall (for example 17) of the machine frame support (for example 1) running perpendicular to a plane lying on the end faces of the printing unit cylinders (for example 2).

Images