EP1459894B1 - Method for mounting a covering on the surface area of 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 on a lateral surface a cylinder of a printing press according to the preamble of claim 1.

From DE 100 24 329 A1 discloses a device for assembly and disassembly at least one elevator to or from a cylinder of a printing press with Help of several, arranged along the cylinder rollers known, with a for Cylinder stationary and spaced stop arranged with a cylinder facing slope the exact application of a leading in the mounting direction end supported by the elevator. Furthermore, one or more rollers are present in the mounting direction pivoting the stop and adjustable to the cylinder. According to one Embodiment is a folded end of a printing plate in the production direction of the cylinder in front of a channel opening on the cylinder, while this end to the Stop strikes. By this arrangement, the insertion of an on-going End of the lift molded Einhänlegeels in an opening in the cylinder not be effectively supported.

From EP 0 678 383 A1 an apparatus for changing printing forms is on Rotary printing machines known in which one of a forme cylinder removed Printing form after its complete removal from the forme cylinder with her bevelled front end of an employed on the forme cylinder pressure roller temporarily rests until in the further course of losing the printing form this against gravity along a Ausschulschrägen as long as promoted until the front end of the printing forme at one in the front area of the Ausschubschrägen arranged angled headband is finally stored. For a new printing forme to be mounted on the forme cylinder has the device two an insertion bevel in the front area delimiting and in the axial direction of the Form cylinder in opposite directions linearly movable holding elements on which the front End of the new form to be mounted until the time of installation of the new Printing form rests. For mounting the new printing form, the holding elements are laterally moved away, so they release the way to the forme cylinder for the new printing form.

EP 1 084 838 A1 discloses a rotary printing press with a device, wherein a newly to be mounted on a form cylinder printing forme from the device is pushed out until they with their front in the mounting direction end to the Touched form cylinder employed Anpressrolle. After that, the new printing forme on the Formed surface of the forme cylinder. An indication of an alignment of the Printing form by means of the pressure roller is not given.

DE 197 19 559 A1 discloses a device for mounting an elevator on a Cylinder of a printing machine, the device being two in the circumferential direction the cylinder arranged one behind the other, mutually parallel slide wherein an acute-angled fold at the leading end of the to be mounted Elevator, the slider and a trained on the lateral surface of the cylinder slit-shaped opening referred to a tangent on the opening imaginary tangent have an equal in the amount same acute opening angle, the elevator with his Bend at its leading end against the circumferential direction of the cylinder behind, on the lateral surface of the cylinder employed slide is guided and there stops, while the front in the circumferential direction of the slide from the Outside of the cylinder is turned off, the front slider for mounting a Elevator whose fold with a surface facing the surface in the Opening pushes, one in the mounting direction of the elevator behind the rear slider arranged, connected to this slide rolling element is provided.

From EP 1 101 612 A2 there is a method and a device for automatic Applying a printing plate to a plate cylinder in a rotary printing press known, wherein the gripped by a gripper pressure plate with its folded, leading end substantially radially against a parallel to the plate cylinder arranged and cooperating with this transfer cylinder and by placing this end on the lateral surface of the transfer cylinder in parallel is aligned with the plate cylinder, wherein the setting up of the end of the pressure plate to a sheet cylinder facing the sheet on the lateral surface of the Transfer cylinder takes place.

By the US 5,671,674 A is a method and an apparatus for mounting a on a form cylinder zoom guided printing known, the printing forme on her leading end has an acute-angled edge, wherein a rolling element is provided, wherein the employees employed on the forme cylinder rolling on the leading end of the printing form unrolls and thereby the fold of the printing plate in one pressed on the lateral surface of the forme cylinder presses.

EP 1 155 840 A discloses a method and a device for mounting a a form cylinder zoom guided printing known, the printing forme on her leading end has an acute-angled fold, one to the forme cylinder Employed and provided on the lateral surface rolling rolling element is provided, wherein the leading end of the printing form is guided against the rolling element, wherein the Rolling element during a rotation of the forme cylinder, the fold at the leading End of the printing plate in an opening formed on the lateral surface of the forme cylinder press as soon as the opening and the fold face each other.

The invention is based on the object, a method for mounting an elevator to create on a lateral surface of a cylinder of a printing press.

The object is achieved by the features of claim 1.

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

Embodiments of the invention are illustrated in the drawings and are in 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 a brought up to a cylinder of a printing machine elevator with a stop and a parked by the cylinder rolling element;

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. B. a web-fed rotary offset printing press, rolls in with at least one elevator 01, z. B. a preferably flexible printing forme 01 Assignable cylinder 02, in particular form cylinder 02 on an impression cylinder 03, z. B. from a transfer cylinder 03. The forme cylinder 02 has at its Lateral surface 04 at least one preferably longitudinal to the forme cylinder 02 extending slit-shaped opening 06, in which one attached to one end of the elevator 01 Edge 07 preferably can be suspended in a form-fitting manner.

The elevator 01, the z. B. as a plate-shaped printing plate 01 or as a blanket carrying carrier plate is configured, has a substantially rectangular area 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 the Opposite side opposite is a work surface, which in the case that the Elevator 01 is formed as a printing forme 01, provided with a printed image or at least with a printed image is foreseeable. The elevator 01 has two opposite ends, wherein at least one end of the fold 07 as a angled suspension leg is attached, with the suspension leg over the width of the elevator 01 extends. The surface of the elevator 01 is at least along the Length L flexible and with an application of the elevator 01 on the lateral surface 04 of the Cylinder 02 of the curvature of the lateral surface 04 adaptable. In the assembled state of Print form 01 thus runs the length L of the surface in the direction of the circumference of Cylinder 02, whereas the width of the surface in the axial direction of the cylinder 02 extends.

The at least one suspension leg of the elevator 01 is by means of a Attached holding device, wherein the holding device is arranged in a channel, wherein the channel i. d. R. extends in the axial direction to the cylinder 02. One with the Production direction P of the cylinder 02 rectified end of the elevator 01 is called its leading end denotes, whereas the opposite end of the trailing end of the elevator 01 is. In this case, the production direction P of the cylinder 02, 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 stare, 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 a 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 consists of a dimensionally stable material, so that the ends by bending against one material-specific resistance are permanently deformable.

In a preferred embodiment, at both ends of the elevator 01 along a Biegekante beveled suspension leg formed, wherein the suspension leg in a narrow, in particular slot-shaped opening 06 of the cylinder 02nd inserted and fastened there by means of the holding device. Related to the length L the non-curved, flat surface or support side of the uninstalled elevator 01 is on one end of a suspension leg on a bending edge with an opening angle α1 or at the other end a suspension leg on a bending edge with a Aperture angle β1 bent, wherein the opening angle α1; β1 i. d. R. between 30 ° and 140 °. If the opening angle α1 the leading end of the elevator 01 is assigned, it is preferably executed acute-angled, in particular it is 45 °. The opening angle β1 at the trailing end of the elevator 01 is often preferred formed greater than 80 ° or obtuse, in particular, it is 85 ° or 135 °. The folded suspension leg at the leading end has a length l1, which z. B. in the range of 4 mm to 11 mm, in particular between 4 mm and 8 mm, with 6 mm being the preferred size. The folded suspension leg on Trailing end has a length I2, the z. B. 6 mm to 15 mm, in particular 8 mm to 12 mm, with the shorter length is preferred to one as possible easy removal of the suspension leg from the opening 06 of the cylinder 02 too guarantee.

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 points in Production direction P of the cylinder 02 a front edge 26 and a rear edge 27th on. Between the extending from the front edge 26 to the channel wall and an imaginary, on the lateral surface 04 of the cylinder 02 on the opening 06th lying on the first tangent T1 is formed an acute opening angle α2, the between 30 ° and 50 °, preferably 45 °. The folded suspension leg on leading end of the elevator 01 is thus at this front edge 26 of the opening 06th preferably form-fitting hooked, because of the suspension leg at the leading End of the elevator 01 in its opening angle α1 preferably the opening angle α2 is adapted. The same applies at the trailing end of the elevator 01. Between the extending from the rear edge 27 to the channel wall and an imaginary, on the lateral surface 04 of the cylinder 02 on the opening 06th lying on the first tangent T1, an opening angle β2 is formed, which is between 80 ° and 95 °, preferably 90 °, or between 120 ° and 150 °, preferably 135 ° is. The folded suspension leg at the trailing end of the elevator 01 is thus preferably positively at this rear edge 27 of the opening 06 suspendable, because the bent suspension leg at the trailing end of Elevator 01 in its opening angle β1 the opening angle β2 at least approximately is adapted.

In the channel (not shown) are z. B. at least one preferably pivotally mounted Holding means and a preferably biased spring element arranged, wherein the Spring element, the holding means z. B. against the folded suspension leg on trailing end presses, which hangs on the opening 06 at its rear edge 27 is, whereby the suspension leg at the trailing end of the from the rear Edge 27 is held towards the channel extending wall. To release the from Holding means exerted pressure is provided in the channel an adjusting means, 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. If the cylinder 02 as a Form cylinder 02 is configured, it can in its axial direction next to each other z. B. be assignable with six plate-shaped printing plates 01. Also can be provided that on the cylinder 02 in the direction of its circumference more than one elevator 01 attachable is. So z. B. two axially to the cylinder 02 extending channels with associated Openings 06 may be provided, which are at the periphery of the cylinder 02 by 180 ° to each other are arranged offset. In this assignment of the cylinder 02 with two along its Circumferentially arranged elevators 01 is the leading end of the one Elevator 01 in which a channel attached, whereas the trailing end of the same Elevator 01 is mounted in the other channel. For the one or the other on this Cylinder 02 arranged lifts 01 applies accordingly. Also, in the axial Direction of the cylinder 02 juxtaposed elevators 01 offset from one another be arranged, for. B. individually or in pairs, each 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 Scope 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, d. H. 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 Traverse 08, the z. B. be a rigid hollow profile with a square cross-section can 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 embodiment shown in Figs. 1 and 2 is at the first end 12 of Support 11 or at the connector 09 at least one to the forme cylinder 02 out Angled stop 14 attached. The stop 14 has z. B. at least at the the supplied elevator 01 side facing the outer surface 04 of the cylinder 02nd directed slope 23, wherein an imaginary rectilinear extension of this Oblique 23, the lateral surface 04 of the cylinder 02 intersects at a point C. Between one at this intersection C applied to the lateral surface 04 of the cylinder 02 second tangent T2 and the bevels 23 and their extension exists preferably an acute opening angle γ. The angle γ facing the elevator 01 (in FIG 2 shown as apex angle) is a maximum of 90 °, preferably 40 ° to 60 °, in particular 45 °. The stop 14 is so close to the lateral surface 04 of the cylinder 02 arranged that a preferably tangentially to the forme cylinder 02 led, to be mounted elevator 01 simultaneously abuts both the stop 14 and with his attached at its leading end fold 07 on the lateral surface 04 of the cylinder 02 rests.

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

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

In the embodiment shown in FIGS. 1 and 2, the rolling element 17 is in Mounting direction M of the elevator 01 arranged behind the stop 14, so that the Stop 14 initially the fold 07 of mounted on the forme cylinder 02 Elevator 01 of the introduced into the lateral surface 04 of the forme cylinder 02 opening 06th supplies. In this case, the fold 07 of the elevator 01 is in the production direction P of the Form cylinder 02 behind the opening 06 on the lateral surface 04 of the forme cylinder 02 on. During a relative movement between the stop 14 and the lateral surface 04 of the Form cylinder 02, which directed a counter to the mounting direction M of the elevator 01 Linear movement of the stopper 14 may be, but preferably a rotation of the Form cylinder 02 is in the production direction P, the fold 07 is in the direction the opening 06 is pushed and hooked into the opening 06 in that the fold 07 falls by the weight of the elevator 01 in 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, d. H. between one in small perpendicular distance a14 from the lateral surface 04 of the forme cylinder 02nd located, preferably the forme cylinder 02 facing the 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 in the height of the fold 07, if this fold 07 on the Outer surface 04 of the forme cylinder 02 rises and not yet in the opening 06th is introduced. To ensure correct seating of the fold 07 of the elevator 01 on a wall of the opening 06, wherein this correct seat by a characterized form-fitting concerns on the wall, that rolls over to the Form cylinder 02 employed rolling element 17 the elevator 01, whereby the elevator 01 at 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. reversible be deformable body, which is preferably formed sheet-shaped. So can the Carrier 11 z. B. as a at its first end 12 firmly clamped spring plate 11th be educated.

Moreover, an adjusting means 19 may be provided, wherein the actuating means 19 preferably as a reactable with a pressure medium, reversibly deformable hollow body 19, z. B. is designed as a hose 19. The actuating means 19 acts on its actuation, d. H. z. B. in its application to the pressure medium on the one hand to the carrier eleventh and on the other hand is supported on the crossbar 08 (FIG. 1). By the operation of the Adjusting means 19, the second end 12 of the carrier 11 in the direction of the forme cylinder 02nd deflectable by an elastic bending of the carrier 11 and the rolling element 17 at the form cylinder 02 adjustable (Fig. 2). Upon completion of the actuation of the actuating means 19 returns the carrier 11 due to its elasticity, d. H. its resilience in his original position back. As a result, the rolling element 17 of the Lateral surface 04 of the forme cylinder 02 or of a on the lateral surface 04 of the Form cylinder 02 resting elevator 01 again turned off, d. H. out of contact.

Figs. 1 and 2 thus show the same exemplary arrangement of a device for Guiding, aligning and pressing an elevator 01 to a cylinder 02 a Printing machine in two different operating states, namely in Fig. 1 im Operating state with a parked rolling element 17 and in Fig. 2 in Operating state with an employed rolling element 17. In both Embodiments is by the proposed device to the cylinder 02nd brought elevator 01 on an introduced into the cylinder 02 preferably slit-shaped opening 06 aligned, so that in the production direction P of the cylinder 02 at the leading end of the elevator 01 mounted bevel 07 in the Opening 06 can be attached.

If the adjusting means 19 is installed between the carrier 11 and the cross member 08, it is advantageous, for. B. on the carrier 11 to form a bar 21 or attach, the Adjustment means 19 from accidental slipping out or removing his Location protects.

For some applications, eg. B. in an arrangement of several printing plates 01 in axial direction side by side on the lateral surface 04 of the forme cylinder 02, it is advantageous, on the traverse 08 in the axial direction next to each other a plurality of carriers 11 in each case at least one rolling element 17 to be arranged, wherein the carrier 11 independently individually or in groups by them associated adjusting means 19 to the Cylinder 02 are switched on or off. Thus, in each case a single rolling element 17 or a group of rolling elements 17 selectively for pressing a particular printing form 01 are used.

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 along the cylinder 02 extending roller or one or more roles takes over Here the function of the stop by a preferably tangential to the cylinder 02 brought elevator 01 on the circumference U of the rolling element 17 within a the Cylinder 02 facing elbow b17 strikes, with an attachment point A of Elevator 01 on the rolling element 17 from the lateral surface 04 of the cylinder 02 lower is spaced as the distance a18 of the rotation axis 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 with the Fulcrum 18 of the rolling element 17 coincides, a leg 28 of the Opening angle δ an outgoing from the vertex distance slot to the lateral surface 04th of the cylinder 02 forms and the opening angle δ at most 60 °, in particular at most 45 °.

As can be seen from Fig. 3, the fold 07 is at the front end of Printing plate 01 at the same time both with the rolling element 17 and with the lateral surface 04 of the cylinder 02 in contact. As a result, the rolling element 17 directs the elevator 01 along to the cylinder 02 off. During a relative movement between the rolling element 17th and the lateral surface 04 of the cylinder 02, in which preferably the cylinder 02 in Production direction P rotates, the rolling element 17 employed on the cylinder 02 rolls such on the lateral surface 04 of the cylinder 02 from 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 assembly of the elevator 01 also creates an operating condition in which the cylinder 02 brought elevator 01 with the fold 07 at its leading end to the Elbow b17 abuts and at the same time at least partially in the in the lateral surface 04 of the cylinder 02 introduced opening 06 protrudes. The orientation of the cylinder 02 brought elevator 01 is therefore preferably also in terms of Opening 06 in the cylinder 02, in which the fold 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 is also in Production direction P of the cylinder 02 precedes.

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 (3)

1. A method of assembling a packing (01) on a generated face (04) of a cylinder (02) of a printing press, wherein the packing (01) has a bevelled portion (07) at least at one end, wherein the bevelled portion (07) has an opening angle (α1) of a maximum of 90° with respect to the stretched length (L) of the packing (01), wherein the packing (01) is guided towards a stop (14) with an inclined portion (23) directed towards the generated face (04) of the cylinder (02), wherein, during a relative movement between the stop (14) and the generated face (04), the stop (14) conveys the bevelled portion (07) of the packing (01) to an opening (06) in the generated face (04) in such a way that the bevelled portion (07) hooks into the opening (06), wherein the relative movement between the stop (14) and the generated face (04) is a rotation of the cylinder (02), wherein a roller element (17) is arranged behind the stop (14) in the assembly direction (M) of the packing (01), characterized in that the bevelled portion (07) drops into the opening (06) on account of the inherent weight of the packing (01) and, during the rotation of the cylinder (02), is automatically drawn in for its fastening in the opening.
2. A method according to Claim 1, characterized in that the roller element (17) is set on the cylinder (02) and, during the rotation of the cylinder (02), rolls over the bevelled portion (07) and presses it into the opening (06).
3. A method according to Claim 1 or 2, characterized in that the opening (06) formed in the generated face (04) of the cylinder (02) has a slot width (S) of from 1 mm to 3 mm.

Images