EP1506860B1 - Method for mounting a covering lead to a cylinder in a printing machine - Google Patents

Abstract

The assembly to fit a printing plate (01) at the cylinder (02) of a printing press, and especially a rotary offset printing press, has at least one limit stop (14) and at least one roller (17). The limit stop is in front of the roller in the fitting direction (M) of the plate. The limit stop is angled towards the cylinder. The plate has a bent edge (07) at its leading end, so that the leading end butts against the limit stop with the bent edge against the cylinder surface (04).

Description

The invention relates to a method for mounting an elevator brought to a cylinder of a printing machine according to the preamble of claim 1.

From DE 100 24 329 A1 discloses a device for assembling and disassembling at least one elevator on or from a cylinder of a printing press with the aid of a plurality of rollers arranged along the cylinder is known, with a cylinder stationary and spaced stop arranged with a Cylinder facing slope supports the exact application of a leading end in the mounting direction of the elevator. Furthermore, one or more rollers are pivotable in the mounting direction in front of the stop and can be adjusted to the cylinder. According to one embodiment, a bevelled end of a printing forme in the direction of production of the cylinder in front of a channel opening on the cylinder, while this end abuts against the stop. By this arrangement, the insertion of an integrally formed at the leading end of the elevator Einhänlegeels can not be effectively supported in an opening in the cylinder.

From EP 0 678 383 A1 a device for changing printing plates to rotary printing machines is known, in which a pressure mold removed from a forme cylinder, after its complete removal from the forme cylinder with its folded front end, temporarily rests against a pressure roller applied to the forme cylinder, until at further course of the removal of the printing form this against gravity along a Ausschubschrägen as long is conveyed up until the front end of the printing plate is finally deposited on a arranged in the front region of the Ausschubschrägen angled headband. For a new printing forme to be mounted on the forme cylinder, the device has two insertion in the front limiting and in the axial direction of the forme cylinder in opposite directions linearly movable holding elements on which rests the front end of the newly mounted printing plate until the time of mounting the new printing form. To mount the new printing form, the holding elements are moved away to the side so that they release the path to the forme cylinder for the new printing form.

From EP 1 084 838 A1, a rotary printing press with a device is known, wherein a new form to be mounted on a printing forme form is pushed out of the device until it touches her in the mounting direction front end an employee employed on the form cylinder pressure roller. Thereafter, the new printing form is mounted on the lateral surface of the forme cylinder. An indication of an alignment of the printing plate by means of the pressure roller is not given.

DE 19719 559 A1 discloses a device for mounting an elevator on a cylinder of a printing press, wherein the device has two parallel arranged in the circumferential direction of the cylinder, parallel aligned slider, wherein an acute-angled fold at the leading end of the elevator to be mounted, the Slider and formed on the lateral surface of the cylinder slot-shaped opening relative to a lying on the opening imaginary tangent have an equal in the same acute opening angle, the elevator with its fold at its leading end against the rear in the circumferential direction of the cylinder, on the lateral surface of the Cylinder employee slider is guided and abuts there, while the front in the circumferential direction of the cylinder slider is turned off by the lateral surface of the cylinder, the front slide for mounting an elevator facing the fold with one of the lateral surface n pushes surface in the opening, wherein an arranged in the mounting direction of the elevator behind the rear slider, provided with this slider rolling element is provided.

From EP 1 101 612 A2 discloses a method and a device for automatically applying a printing plate on a plate cylinder in a rotary printing machine, said gripped by a gripper pressure plate arranged with its bent, leading end substantially radially against a parallel to the plate cylinder and with guided this cooperating transfer cylinder and aligned by placing this end on the lateral surface of the transfer cylinder parallel to the plate cylinder, wherein the setting up of the end of the printing plate on a plate cylinder facing the sheet on the lateral surface of the transfer cylinder.

No. 5,671,674 A discloses a method and a device for mounting a printing forme brought to a forme cylinder, the printing forme having an acute-angled fold at its leading end, a rolling element being provided, the rolling element attached to the forme cylinder being at the leading end the printing form unwinds while pressing the fold of the printing forme in an opening formed on the lateral surface of the forme cylinder.

EP 1 155 840 A discloses a method and a device for mounting a printing forme brought to a forme cylinder, wherein the printing forme has an acute-angled fold at its leading end, wherein a rolling element is provided on the forme cylinder and rolling on its lateral surface, wherein the leading end of the printing forme is guided against the rolling element, wherein the rolling element during a rotation of the forme cylinder presses the fold at the leading end of the printing plate in an opening formed on the lateral surface of the forme cylinder, as soon as the opening and the fold face.

The invention has for its object to provide a method for mounting a zoom brought up to a cylinder of a printing machine elevator.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular in that the proposed method an aufzuspannender on a cylinder elevator is supplied by means of a stop such an opening in the cylinder that this is largely automatically retracted during its rotation of the cylinder to its attachment in the opening. In addition, the risk of injury is reduced in particular in a device with a stop arranged in front of a rolling element for an operator, because the proposed arrangement of stop and rolling element prevents access to dangerous locations of the rotating parts.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

eine Vorrichtung zum Ausrichten eines an einen Zylinder einer Druckmaschine herangeführten Aufzugs mit einem Anschlag und einem vom Zylinder - abgestellten Wälzelement;

Fig. 2

eine Vorrichtung zum Ausrichten eines an einen Zylinder einer Druckmaschine herangeführten Aufzugs mit einem Anschlag und einem vom Zylinder angestellten Wälzelement;

Fig. 3

eine Vorrichtung zum Ausrichten eines an einen Zylinder einer Druckmaschine herangeführten Aufzugs mit einem Wälzelement als Anschlag.

Show it:

Fig. 1

a device for aligning an elevator brought to a cylinder of a printing press with a stop and a rolling element parked by the cylinder;

Fig. 2

a device for aligning a brought up to a cylinder of a printing machine elevator with a stop and an employee employed by the cylinder rolling element;

Fig. 3

a device for aligning a brought up to a cylinder of a printing machine elevator with a rolling element as a stop.

In a printing press, z. As a web-fed rotary offset printing press, rolls with at least one elevator 01, z. B. a preferably flexible printing forme 01 assignable cylinder 02, in particular form cylinder 02 on a counter-pressure cylinder 03, z. B. from a transfer cylinder 03. The forme cylinder 02 has on its lateral surface 04 at least one preferably along the forme cylinder 02 extending slot-shaped opening 06, in which a attached to one end of the elevator 01 fold 07 is preferably positively mounted.

The elevator 01, the z. B. is configured as a plate-shaped printing plate 01 or as a support plate carrying a blanket, has a substantially rectangular surface with the length L and the width. The surface has a support side, with which the elevator 01 rests in the mounted state on a lateral surface 04 of a cylinder 02. The side opposite the support side is a work surface which, in the event that the elevator 01 is formed as a printing forme 01, is provided with a printed image or at least can be provided with a printed image. The elevator 01 has two opposite ends, wherein at least one end of the fold 07 is attached as an angled suspension leg, wherein the suspension leg extends across the width of the elevator 01. The surface of the elevator 01 is flexible at least along the length L and adaptable to the curvature of the lateral surface 04 when the elevator 01 is applied to the lateral surface 04 of the cylinder 02. In the assembled state of the printing plate 01, the length L of the surface thus extends in the direction of the circumference of the cylinder 02, whereas the width of the surface extends in the axial direction of the cylinder 02.

The at least one suspension leg of the elevator 01 is fastened by means of a holding device, wherein the holding device is arranged in a channel, wherein the channel usually extends in the axial direction to the cylinder 02. A rectified with the production direction P of the cylinder 02 end of the elevator 01 is referred to as the leading end, whereas the opposite end is the trailing end of the elevator 01. In this case, the production direction P of the cylinder 02 is the direction of rotation of the cylinder 02 during the printing process. At least the ends the elevator 01 with the hanging legs formed thereon consist of a rigid, z. B. metallic material, eg. B. of an aluminum alloy. Usually, the material thickness of the elevator 01 or the material thickness is at least of the Einhänbringeln few tenths of a millimeter, z. B. 0.2 mm to 0.4 mm, preferably 0.3 mm. Thus, the elevator 01 as a whole or at least at its ends of a dimensionally stable material, so that the ends are permanently deformed by a bend against a material-specific resistance.

In a preferred embodiment, bent-in suspension legs are formed at both ends of the elevator 01 along a bending edge, wherein the suspension legs can be inserted into a narrow, in particular slot-shaped opening 06 of the cylinder 02 and fastened there by means of the holding device. Based on the length L of the non-curved, flat surface or support side of the uninstalled elevator 01 is bent at one end a suspension leg on a bending edge with an opening angle α1 or at the other end a suspension leg at a bending edge with an opening angle β1, wherein the opening angle α1; β1 usually lie between 30 ° and 140 °. If the opening angle α1 is assigned to the leading end of the elevator 01, it is preferably executed at an acute angle, in particular it is 45 °. The opening angle β1 at the trailing end of the elevator 01 is often preferably greater than 80 ° or obtuse-angled, in particular it is 85 ° or 135 °. The folded suspension leg at the leading end has a length 11, which z. B. is in the range of 4 mm to 11 mm, in particular between 4 mm and 8 mm, with 6 mm is the preferred measure. The folded suspension leg at the trailing end has a length 12, the z. B. 6 mm to 15 mm, in particular 8 mm to 12 mm, but rather the shorter length is preferred in order to ensure the simplest possible removal of the suspension leg from the opening 06 of the cylinder 02.

The cylinder 02 has on its lateral surface 04 at least one narrow, slot-shaped opening 06 with the slot width S, wherein the slot width S is less than 5 mm and preferably in the range of 1 mm to 3 mm. The opening 06 has a front edge 26 and a rear edge 27 in the production direction P of the cylinder 02. Between the extending from the front edge 26 to the channel wall and an imaginary, resting on the lateral surface 04 of the cylinder 02 on the opening 06 first tangent T1 an acute opening angle α2 is formed, which is preferably between 30 ° and 50 ° 45 ° , The bent suspension leg at the leading end of the elevator 01 is thus preferably positively clamped at this front edge 26 of the opening 06, because the suspension leg at the leading end of the elevator 01 in its opening angle α1 is preferably adapted to the opening angle α2. In the same way it behaves at the trailing end of the elevator 01. Between the extending from the rear edge 27 to the channel wall and an imaginary, resting on the outer surface 04 of the cylinder 02 on the opening 06 first tangent T1 an opening angle β2 is formed which is between 80 ° and 95 °, preferably 90 °, or between 120 ° and 150 °, preferably 135 °. The bent suspension leg at the trailing end of the elevator 01 is thus preferably positively clamped at this rear edge 27 of the opening 06, because the folded suspension leg at the trailing end of the elevator 01 in its opening angle β1 the opening angle β2 is at least approximately adapted.

In the channel (not shown) are z. B. at least one preferably pivotally mounted holding means and a preferably biased spring element, wherein the spring element, the holding means z. B. presses against the folded suspension leg at the trailing end, which is hooked to the opening 06 at its rear edge 27, whereby the suspension leg is held at the trailing end of the extending from the rear edge 27 to the channel wall. To release the pressure exerted by the holding means an actuating means is provided in the channel, which at its operation pivots the holding means against the force of the spring element. The holding device therefore consists essentially of the holding means, the spring element and the actuating means.

The cylinder 02 may be such that on its lateral surface 04 more, preferably similar elevators 01 can be arranged. When the cylinder 02 is configured as a forme cylinder 02, it can be in its axial direction next to each other z. B. with six plate-shaped printing plates 01 be assignable. It can also be provided that more than one elevator 01 can be attached to the cylinder 02 in the direction of its circumference. So z. B. two axially extending to the cylinder 02 channels may be provided with associated openings 06, which are arranged offset by 180 ° to each other on the circumference of the cylinder 02. In this assignment of the cylinder 02 with two successively arranged along its circumference elevators 01, the leading end of an elevator 01 is fixed in the one channel, whereas the trailing end of the same elevator 01 is fixed in the other channel. For the or the other arranged on this cylinder 02 lifts 01 applies accordingly. Also, in the axial direction of the cylinder 02 juxtaposed elevators 01 may be arranged offset from each other, for. B. individually or in pairs by half a length L of the elevator 01, which, however, requires that more channels with associated openings 06 or at least portions of the same are introduced into the cylinder 02, along the circumference of the cylinder 02 to the two aforementioned channels and Openings 06 z. B. are arranged offset by 90 °.

Preferably in the region before and between the forme cylinder 02 and the impression cylinder 03, ie in the gap or in the of the lateral surfaces 04 of the cylinder 02; 03 limited space is a longitudinal to these cylinders 02; 03 extending cross member 08, the z. B. may be a rigid hollow profile with a square cross-section and the z. B. stationary to the forme cylinder 02 is arranged. At this Traverse 08 is either directly or by means of a connector 09, the z. B. an L-shaped bar can be, a carrier 11 attached, which has a first end 12, with which the carrier 11 is attached to the cross member 08 or the connector 09. The attachment of the first end 12 of the carrier 11 is preferably carried out with a connecting element 13, which may be a screw 13 or a rivet 13. The first end 12 of the carrier 11 is thus not articulated, but in particular rigidly clamped.

In the exemplary embodiment shown in FIGS. 1 and 2, at least one abutment 14, which is angled away from the forme cylinder 02, is attached to the first end 12 of the carrier 11 or to the connecting piece 09. The stop 14 has z. B. at least on the supplied elevator 01 side facing a to the lateral surface 04 of the cylinder 02 directed bevel 23, wherein an imaginary rectilinear extension of these bevels 23, the lateral surface 04 of the cylinder 02 intersects at a point C. Between an applied to this intersection point C to the lateral surface 04 of the cylinder 02 second tangent T2 and the bevels 23 and their extension is preferably an acute opening angle γ. The angle γ facing the elevator 01 (shown as apex angle in FIG. 2) is a maximum of 90 °, preferably 40 ° to 60 °, in particular 45 °. The stop 14 is arranged so close to the lateral surface 04 of the cylinder 02, that a preferably tangentially to the forme 02 fed, to be mounted elevator 01 simultaneously abuts both the stop 14 and mounted with its attached to its leading end bevel 07 on the lateral surface 04th of the cylinder 02 rests.

By integrally formed on the stop 14, the forme cylinder 02 facing bevel 23 an orientation of the fold 07 is supported on the forme cylinder 02 to be mounted elevator 01 and fed this fold 07 of the introduced into the lateral surface 04 of the forme 02 opening 06, while the forme cylinder 02 rotates in its production direction P. In this case, the stop 14 may be formed as a bar 14, which preferably extends longitudinally to the forme cylinder 02 and either one or more, optionally spaced from each other arranged pieces consists. Such a bar 14 may simultaneously z. B. assume the function of a finger guard between the forme cylinder 02 and the impression cylinder 03. The stop 14 may, for. B. by means of the previously described connecting element 13 on the carrier 11 and the connecting piece 09 may be attached.

At a first end 12 of the support 11 opposite the second end 16 at least one rotatably mounted rolling element 17 is arranged such that the rolling element 17 roll on a setting on the forme cylinder 02 on the lateral surface 04 or on a resting on the lateral surface 04 Elevator 01 can (Fig. 2), whereby the attached at one end of the elevator 01 fold 07 is pressed into the opening 06 in the lateral surface 04 of the cylinder 02 and an elevator 01 is pressed against the lateral surface 04 of the forme cylinder 02. The axis of rotation 18 of the rolling element 17 thus extends longitudinally to the forme cylinder 02. The rolling element 17 is preferably designed as at least one or more rollers 17 or as a roller 17.

In the embodiment shown in FIGS. 1 and 2, the rolling element 17 is arranged in the mounting direction M of the elevator 01 behind the stop 14, so that the stop 14 initially the fold 07 of the form cylinder 02 to be mounted on the elevator 01 in the lateral surface 04 of the Form cylinder 02 introduced opening 06 feeds. In this case, the fold 07 of the elevator 01 is in the production direction P of the forme cylinder 02 behind the opening 06 on the lateral surface 04 of the forme cylinder 02. During a relative movement between the stop 14 and the lateral surface 04 of the forme cylinder 02, which may be a counter to the mounting direction M of the elevator 01 directed linear movement of the stopper 14, but which is preferably a rotation of the forme cylinder 02 in its production direction P, the fold 07 pushed in the direction of the opening 06 and hooks into the opening 06 in that the fold 07 falls by the weight of the elevator 01 into the opening 06. During the preferred further rotation of the forme cylinder 02 in its production direction P, the elevator 01 is pulled under the stop 14, ie located between a low perpendicular distance a14 of the lateral surface 04 of the forme cylinder 02, preferably the forme cylinder 02 facing end 22 of the stopper 14 and this lateral surface 04 of the forme cylinder 02. The distance a14 is only a few millimeters, z. B. 1 to 3 mm. This distance a14 is thus less than a distance a07, which results as the height of the fold 07, when this fold 07 rests on the lateral surface 04 of the forme cylinder 02 and is not yet introduced into the opening 06. To ensure correct seating of the fold 07 of the elevator 01 on a wall of the opening 06, wherein this correct seat is characterized by a positive engagement on the wall, the rolling element 17 employed on the forme cylinder 02 rolls over the elevator 01, causing the elevator 01 to move the lateral surface 04 of the forme cylinder 02 is pressed firmly.

The carrier 11 itself may advantageously be designed as an elastically bendable, d. H. be reversibly deformable body, which is preferably formed sheet-shaped. Thus, the carrier 11 z. B. may be formed as a at its first end 12 firmly clamped spring plate 11. -

Moreover, an adjusting means 19 may be provided, wherein the adjusting means 19 preferably as an acted upon by a pressure medium, reversibly deformable hollow body 19, for. B. is designed as a hose 19. The actuating means 19 acts on its actuation, ie, for example, when it is acted upon by the pressure medium, on the one hand, on the carrier 11 and, on the other hand, is supported on the cross member 08 (FIG. 1). By actuating the adjusting means 19, the second end 12 of the carrier 11 in the direction of the forme cylinder 02 by an elastic bending of the carrier 11 is deflectable and the rolling element 17 to the forme cylinder 02 adjustable (Fig. 2). Upon completion of the actuation of the actuating means 19, the carrier 11 returns due to its elasticity, ie its spring-back property in its original position. As a result, the rolling element 17 of the Outer surface 04 of the forme cylinder 02 or from a resting on the outer surface 04 of the forme cylinder 02 elevator 01 again turned off, ie out of contact.

1 and 2 thus show the same exemplary arrangement of an apparatus for guiding, aligning and pressing an elevator 01 to a cylinder 02 of a printing press in two different operating states, namely in the operating state with a parked rolling element 17 and in FIG 2 in the operating state with a salaried rolling element 17. In both embodiments, an introduced to the cylinder 02 elevator 01 is aligned on an introduced into the cylinder 02 preferably slit-shaped opening 06 by the proposed device, so that in the production direction P of the cylinder 02 on the leading End of the elevator 01 attached fold 07 can be fixed in the opening 06.

If the adjusting means 19 is installed between the carrier 11 and the cross member 08, it is advantageous, for. B. to form the carrier 11, a bar 21 or to install, which protects the actuating means 19 against accidental slipping out or removal from its mounting location.

For some applications, eg. B. in an arrangement of several printing plates 01 in the axial direction next to each other on the lateral surface 04 of the forme cylinder 02, it is advantageous to arrange on the crossbar 08 in the axial direction next to each other several carriers 11, each with at least one rolling element 17, wherein the carrier 11 independently individually or in groups by means assigned thereto adjusting means 19 to the cylinder 02 on or are abstellbar. Thus, in each case a single rolling element 17 or a group of rolling elements 17 can be used selectively for pressing a specific printing plate 01.

In a further embodiment of FIG. 3 is close to a cylinder 02nd arranged bar has been dispensed with the function of a stop. At least one preferably on the cylinder 02 on or Abstellbares rolling element 17, z. B. a longitudinally to the cylinder 02 extending roller or one or more roles, takes over here the function of the stop by a preferably tangentially to the cylinder 02 zoomed elevator 01 on the circumference U of the rolling element 17 within a cylinder 02 facing elbow b17 strikes, wherein an abutment point A of the elevator 01 on the rolling element 17 from the lateral surface 04 of the cylinder 02 is spaced less than the distance a18 of the axis of rotation 18 of the rolling element 17 of the lateral surface 04 of the cylinder 02. The elbow b17 is located between two legs 28; 29 of an opening angle δ, wherein a vertex of the opening angle δ coincides with the axis of rotation 18 of the rolling element 17, a leg 28 of the opening angle δ forms an outgoing from the vertex distance slot to the lateral surface 04 of the cylinder 02 and the opening angle δ at most 60 °, in particular at most 45 ° is.

As can be seen from FIG. 3, the bevel 07 at the front end of the printing forme 01 is simultaneously in contact both with the rolling element 17 and with the lateral surface 04 of the cylinder 02. As a result, the rolling element 17 aligns the elevator 01 along the cylinder 02. During a relative movement between the rolling element 17 and the lateral surface 04 of the cylinder 02, in which preferably the cylinder 02 rotates in the production direction P, the rolling element 17 attached to the cylinder 02 rolls on the lateral surface 04 of the cylinder 02 in such a way that the rolling element 17 the elevator 01, which abuts with its fold 07 on the rolling element 17, in a in the lateral surface 04 of the cylinder 02 introduced, preferably slot-shaped opening 06 leads and pushes there for the purpose of its support. During the assembly of the elevator 01, an operating state arises in which the elevator 01 brought up to the cylinder 02 strikes the bend piece b17 with the fold 07 at its leading end and at the same time at least partially penetrates into the opening 06 introduced into the lateral surface 04 of the cylinder 02 protrudes. The orientation of the cylinder 02 brought elevator 01 is therefore preferably also with respect to the opening 06 in the cylinder 02, in which the Abkantung 07 of the elevator 01 is supported. The resting on the outer surface 04 of the cylinder 02 to be aligned end of the elevator 01 is preferably that end of the elevator 01, which also precedes in the production direction P of the cylinder 02.

LIST OF REFERENCE NUMBERS

01

Elevator, printing form

02

Cylinder, forme cylinder

03

Cylinder, impression cylinder, transfer cylinder

04

lateral surface

05

-

06

opening

07

fold

08

traverse

09

joint

10

-

11

Carrier, spring plate

12

Finish, first

13

Connecting element, screw, rivet

14

Stop, bar

15

-

16

End, second

17

Rolling element, roller, roller

18

axis of rotation

19

Adjusting means, hollow body, hose

20

-

21

strip

22

The End

23

slope

24

-

25

-

26

Edge, front

27

Edge, rear

28

Leg; distance slot

29

leg

A

anchorage point

C

Point, intersection

L

length

M

mounting direction

P

production direction

S

slot width

T1

Tangent, first

T2

Tangent, second

U

scope

I1

length

I2

length

a07

distance

a14

distance

a18

distance

b17

elbow

α1

opening angle

α2

opening angle

β1

opening angle

β2

opening angle

γ

Angle, opening angle

δ

opening angle

Claims (7)

1. A method of assembling a packing (01) applied to a cylinder (02) of a printing press, wherein a roller element (17) is provided, characterized in that during its assembly the packing (01) applied to the cylinder (02) abuts with a bevelled portion (07) at its leading end against the periphery (U) of the roller element (17) inside a curved member (b17) facing the cylinder (02) and at the same time projects at least in part into an opening (06) formed in the generated face (04) of the cylinder (02).
2. A method according to Claim 1, characterized in that the curved member (b17) facing the cylinder (02) is situated between two sides (28; 29) of an opening angle (δ), wherein a vertex point of the opening angle (δ) coincides with the axis of rotation (18) of the roller element (17), wherein a side (28) of the opening angle (δ) forms a distance vertical - which starts from the vertex - to the generated face (04) of the cylinder (02) and wherein the opening angle (δ) amounts at most to 60°.
3. A method according to Claim 2, characterized in that the opening angle (δ) amounts at most to 45°.
4. A method according to any one of Claims 1 to 3, characterized in that the end of the packing (01) resting on the generated face (04) of the cylinder (02) is an end of the packing (01) which is leading in the production direction (P) of the cylinder (02).
5. A method according to any one of Claims 1 to 4, characterized in that the roller element (17) is capable of being set on and off the cylinder (02).
6. A method according to any one of Claims 1 to 5, characterized in that the roller element (17) extends longitudinally with respect to the cylinder (02).
7. A method according to any one of Claims 1 to 6, characterized in that the opening (06) formed in the generated face (04) of the cylinder (02) has a width (S) of the slot of from 1 mm to 3 mm.

Images