Device and method for multi-stage cylinder mounting

Abstract

The invention relates to a method and a device for automatically mounting a printing cylinder (2) of a printing unit (1), the cylinder having a longitudinal axis (3), by means of a second bearing (21) in a second holder (20). The second holder (20) is adjusted by an axial stroke a along the longitudinal axis (3) of the printing cylinder (2) to expose a second bearing point (22) or the second bearing (21), and is also adjusted perpendicular to the longitudinal axis (3) of the printing cylinder (2) by an adjustment path y. The object of the present invention is to provide a solution for gently sliding the second holder (20) onto the second bearing (21).The problem is solved by a method and a device in which, in order to re-engage the printing cylinder (2) by the second support (20), in a first method step the second support (20) is adjusted by a first partial adjustment path y1 perpendicular to the longitudinal axis (3) of the printing cylinder (2), wherein in a second method step the second support (20) is adjusted by a first partial axial stroke a1, wherein in a third method step the second support (20) is adjusted by a second partial adjustment path y2 perpendicular to the longitudinal axis (3) of the printing cylinder (2), wherein in a fourth method step the second support (20) is adjusted by a second partial axial stroke a2 in the extent of the longitudinal axis (3) of the printing cylinder (2).

Description

[0001] The invention relates to a method for automatically mounting a printing cylinder having a longitudinal axis of a printing unit by means of a second bearing in a second holder, wherein in a first embodiment, to make the printing cylinder accessible, the second holder is adjusted by an axial stroke a in the extension of the longitudinal axis of the printing cylinder to expose a second bearing point or the second bearing and is adjusted perpendicular to the longitudinal axis of the printing cylinder by an adjustment path y, wherein the printing cylinder is held in a first holder, and wherein in a second embodiment, to make the printing cylinder accessible, the printing cylinder is adjusted by an axial stroke a in the extension of the longitudinal axis to separate the printing cylinder from the second holder, and wherein the second holder is adjusted perpendicular to the longitudinal axis of the printing cylinder by an adjustment path y, wherein the printing cylinder is held by means of a first holder.

[0002] The invention further relates to a printing unit comprising a first holder with at least one first bearing for receiving a first bearing point of a printing cylinder with a longitudinal axis, and a second holder with at least one second bearing for receiving a second bearing point of the printing cylinder, wherein, to make the printing cylinder accessible, the printing unit is designed such that the second holder is first movable by an axial stroke a in the extension of the longitudinal axis of the printing cylinder to release the second bearing point or the second bearing, and subsequently adjustable perpendicular to the longitudinal axis by an adjustment path y, wherein the printing cylinder is mounted in the first holder.

[0003] Printing devices are known from the prior art in which a change of the functional surface and / or the circumference of at least one printing cylinder is possible, for example by means of printing form sleeves, sleeves for changing the transfer cylinder or sleeves of different thicknesses to change the cylinder circumference and thus the printing length.

[0004] In this context, the term "printing cylinder" refers to all cylinders used in printing processes known from the prior art. A printing cylinder can thus be, for example, a printing form cylinder (also called a plate cylinder in offset printing), a transfer cylinder (also called a rubber cylinder in offset printing due to its covering with a printing blanket, also known as a rubber blanket), or an impression cylinder. When such sleeve-shaped cylinders need to be replaced, this is only possible, due to the circumferentially closed nature of the sleeve, by sliding the sleeve laterally onto the corresponding printing cylinder.

[0005] For example, EP 2 388 141 A2 discloses a format-variable printing unit in which a plurality of printing cylinders are arranged in a spatially variable manner in order to be able to exchange or change the corresponding printing cylinders.

[0006] DE 199 37 796 A1 discloses a printing unit concept in which the printing cylinders are mounted in linear guides so that they can be adjusted relative to each other, so that the distance between the cylinders can be adjusted when the cylinder diameter is changed.

[0007] JPH 10-305558 discloses a printing unit in which a form cylinder is mounted in a first side wall and in a second side wall, wherein, in order to change the sleeve of the form cylinder, the form cylinder is raised by a first lifting device in the area of ​​the first side wall and by a second lifting device in the area of ​​the second side wall, until the form cylinder is pressed against a support arm arranged in the area of ​​the first side wall and opposite the first lifting device, so that, in order to carry out the sleeve change, the second lifting device is lowered, so that the form cylinder in the area of ​​the second side wall is accessible from the outside.

[0008] EP 0 656 259 B1 discloses a flexographic printing machine in which a form cylinder is designed as a sleeve rotating on a mandrel, wherein, in order to change the form cylinder sleeve, the form cylinder is moved away from the central cylinder in a radial direction and the mandrel of the form cylinder is then moved in a vertical direction in order to bring a form cylinder end out of the bearing engagement.

[0009] In printing presses known from the prior art, a printing cylinder is supported on both sides, that is, on both sides of the functional surface. With such double-sided support, which is particularly necessary for medium and large web widths to achieve print quality, a printing cylinder includes a first bearing point on its first side, on which a first bearing, usually a rolling bearing, is arranged, the first bearing being located in a first support. The first support can, for example, be the side wall if the printing cylinder's spatial position is not to be changed or only to a minor extent, whereas in spatially adjustable printing cylinders, the first support is arranged to be spatially adjustable relative to the side wall.Such a pressure cylinder further comprises a second bearing point on its other side, on which a second bearing, which is usually also designed as a rolling bearing, is mounted. This second bearing is supported in a second bracket.

[0010] To replace the elevator or a closed sleeve on the printing cylinder, the second bracket must be removed in front of the cylinder, viewed along its longitudinal axis. This is achieved, for example, by pulling the second bracket from the second bearing along the cylinder's length, or by pulling the second bracket, along with the second bearing, from the cylinder's second bearing point and then moving it in a plane perpendicular to the cylinder's longitudinal axis. This exposes the cylinder along its longitudinal axis, allowing for its conversion. While the first bracket is removed, the cylinder is held solely by the second bracket. It is also possible that an additional support is provided by a pin on the printing cylinder, in addition to the first bracket.

[0011] After the conversion process, such as changing a sleeve located on the printing cylinder, the printing cylinder must be stored again in the second holder, whereby the second holder, if necessary with the second bearing installed in it, is moved to the original position, so that the second holder is then either pushed in the direction of the longitudinal axis of the printing cylinder onto the second bearing of the printing cylinder, or that the second bearing mounted in the second holder together with the second holder is pushed in the direction of the longitudinal axis of the printing cylinder onto the second bearing point of the printing cylinder.

[0012] However, particularly with very long and / or very slim printing cylinders, the problem arises that, due to the unavoidable bending of the printing cylinder and / or the bearing clearance required for function and service life in the first bearing, the position of the second bearing point deviates slightly from its original position with double-sided support after the removal of the second bracket, which can lead to problems when sliding the second bracket onto the second bearing or when sliding the second bearing, mounted in the second bracket, onto the second bearing point, such as tilting or the risk of damage to the running surfaces of the second bearing.

[0013] The object of the present invention is therefore to find a solution for gently sliding the second bracket onto the second bearing or the second bearing mounted in the second bracket onto the second bearing position, and to avoid tilting and damage to the second bearing or the bearing seats and running surfaces.

[0014] The present problem is solved by a method according to claim 1 and by a device according to claim 7.

[0015] The problem is solved by a method in which, in order to re-engage the printing cylinder with the second support, the second support is adjusted in a first method step by a first partial adjustment path y1 perpendicular to the longitudinal axis of the printing cylinder, wherein the first partial adjustment path y1 deviates from the original adjustment path y, wherein in a second method step, in the first embodiment, the second support is adjusted by a first partial axial stroke a1 in the extent of the longitudinal axis of the printing cylinder, or wherein, in the second embodiment, the printing cylinder is adjusted by a first partial axial stroke a1 in the extent of the longitudinal axis of the printing cylinder, such that the second support partially engages the second bearing, or that the second bearing located in the second support partially engages the second bearing point of the printing cylinder.wherein in a third process step the second bracket is adjusted by a second partial adjustment path y2 perpendicular to the longitudinal axis of the printing cylinder, wherein in a fourth process step in the first embodiment the second bracket is adjusted by a second partial axial stroke a2 in the extent of the longitudinal axis of the printing cylinder or wherein in the second embodiment the printing cylinder is adjusted by a second partial axial stroke a2 in the extent of the longitudinal axis, so that the second bracket completely accommodates the second bearing or that the second bearing located in the second bracket completely accommodates the second bearing point of the printing cylinder.

[0016] According to one embodiment of the invention, in the first embodiment the second support extending along the longitudinal axis of the pressure cylinder is adjusted by means of an electric or pneumatic drive. Such an embodiment has the advantage that stepwise adjustment can be easily implemented and that the force during assembly of the bearing can be easily limited.

[0017] According to a further embodiment of the invention, the second support is adjusted in a direction perpendicular to the longitudinal axis of the pressure cylinder either by a pivoting movement and / or by a linear movement. Such an adjustment has the advantage of a large adjustment range, so that this solution can also be used for significant changes in diameter.

[0018] According to a further embodiment of the invention, the first partial axial stroke a1 and / or the second partial axial stroke a2 is detected by means of a sensor and stopped if necessary. Such an embodiment has the advantage that the pushing force is monitored in each process step, so that excessively high pushing forces, which could damage a component, can be avoided.

[0019] Preferred embodiments of the invention are described in the dependent claims and the following description. Various exemplary embodiments of the invention are explained in more detail with reference to the drawings, without being limited thereto. These show: Fig. 1 A basic structure of an exemplary printing unit. Fig. 2 A basic structure of a printing cylinder including double-sided bearings. Fig. 3 A printing cylinder with the second support disengaged. Fig. 4 A printing cylinder after the second process step. Fig. 5 A printing cylinder after the double-sided bearings have been re-established. Fig. 6 A printing cylinder with adjustment of the second support by means of a multi-position cylinder.

[0020] Fig. 1Figure 1 shows the basic structure of an exemplary printing unit 1. This unit comprises a plurality of printing cylinders 2 arranged essentially one above the other, with the substrate web 9 running between two printing cylinders 2. In the case of the configuration of the printing unit 1 as an offset printing unit for single-sided printing of the substrate web 9, the upper printing cylinder 2, which is in contact with the inking rollers 8 arranged above it, is designed as a plate cylinder or form cylinder, whereas the middle printing cylinder 2 is designed as a transfer cylinder, which is also referred to as a rubber cylinder. The lowest printing cylinder 2 shown is designed as an impression cylinder in an offset printing unit.However, since the present invention is applicable to all corresponding printing cylinders 2 regardless of the design of the printing cylinders 2, the term printing cylinder 2 will be used exclusively below for all such cylinders, which are also used in modified form in printing units for other printing processes.

[0021] If the section length of so-called variable-format printing units 1 needs to be changed, the diameters and thus the circumferences of the corresponding printing cylinders 2 are exchanged. Referring to the in Fig. 1In the illustrated example, the diameters of the upper and middle printing cylinders 2 would be changed by exchanging the sleeves 6 attached to the respective printing cylinders 2. Due to the closed surface of such sleeves 6, these sleeves 6 can only be removed from the end face of a corresponding printing cylinder 2. Because of the variable diameters of such printing cylinders 2, either these printing cylinders 2 with variable diameters and / or the adjacent printing cylinders 2 are mounted in a correspondingly adjustable manner. This can be achieved, for example, by mounting the relevant printing cylinder(s) 2 in or on levers 5 so that they are adjustable.

[0022] At the in Fig. 1 In the example shown, the middle pressure cylinder 2 is mounted on the upper pivotably mounted lever 5 and is adjusted during the pivoting movement of the lever 5, symbolized by a curved arrow.

[0023] At the in Fig. 1 In the example shown, the lower pressure cylinder 2 is linearly movable and mounted in the lower lever 5, thus allowing its position to be changed.

[0024] The upper printing cylinder 2, designed as a form cylinder, can, for example, be in the in at least one side Fig. 1 The cylinder may be mounted on the side wall not shown in the drawing, provided that this pressure cylinder 2 does not need to be changed spatially or only slightly in its position.

[0025] Fig. 2Figure 1 shows a top view of an exemplary mounting of an arbitrary printing cylinder 2 on which a sleeve 6 is mounted. The cylinder 2 is rotatably mounted about its longitudinal axis 3. For this purpose, the printing cylinder 2 includes a first bearing point 12 on which a first bearing 11 is arranged, the first bearing 11 being held in a first bracket 10. This first bracket 10 can either be the side wall of the printing unit 1, provided the printing cylinder 2 is not adjustable or only slightly adjustable. Alternatively, the first bracket 10 can be a receptacle for the first bearing 11 that is movably mounted on the side wall or, for example, on a lever 5 or on a rocker arm.

[0026] Furthermore, the pressure cylinder 2 includes a second bearing 22 on the side opposite the first bearing point 12, on which a second bearing 21 is arranged, the second bearing 21 being arranged in a second bracket 20. This second bracket 20 is located in the Fig. 2 In the example shown, the second bracket 20 and / or the second bearing 21 are arranged on a lever 5, since, regardless of the spatial adjustability of the pressure cylinder 2, the second bracket 20 and / or the second bearing 21 must be removed to change the sleeve 6.

[0027] Fig. 3 Figure 2 shows the printing cylinder 2 in an arrangement in which the sleeve 6 can be replaced. Here, the second bracket 20, together with the second bearing 21, is completely removed from the second bearing point 22, so that the sleeve 6 can be pulled off.

[0028] At the in Fig. 2In the illustrated example, the second bracket 20, together with the second bearing 21, is first moved away from the second bearing position 22 by an axial stroke a, with the axial stroke a extending in the direction of the longitudinal axis 3 of the printing cylinder 2. After the second bearing 21, together with the second bracket 20, has been moved away from the second bearing position 22 in the direction of the longitudinal axis 3, the second bracket 20, together with the second bearing 21 mounted therein, is adjusted perpendicular to the longitudinal axis 3 of the printing cylinder 2 by the adjustment path y. The adjustment path y is dimensioned such that the second bracket 20 is positioned away from the printing cylinder 2 perpendicular to the longitudinal axis 3 of the printing cylinder 2 such that the printing cylinder 2 is fully accessible from its end face, allowing the sleeve 6 to be replaced. The adjustment path y can be executed by means of a pivoting movement, a linear movement, or any other arbitrary movement.

[0029] At the in Fig. 3 In the example shown, the second bearing 21 together with the second bracket 20 is subtracted from the first bearing point 12, since in this example the second bearing 21 is held in the second bracket 20 in the direction of the longitudinal axis 3.

[0030] Although in Figs. 3 and 4 Although not shown in the drawing, it is also possible that, in order to make the pressure cylinder 2 accessible by spatially moving the second support 20, only the second support 20 is first adjusted by the axial stroke a in the direction of the longitudinal axis 3 to release the second bearing 21, and that then only the second support 20 is adjusted perpendicular to the longitudinal axis 3 of the pressure cylinder 2 by the adjustment path y, so that the second bearing 21 remains at the second bearing position 22.

[0031] Although in Figs. 3 and 4Although not shown in the drawing, it is also possible that, to make the pressure cylinder 2 accessible by spatially moving the second support 20, both the second support 20 and a part of the second bearing 21, such as the outer bearing ring of the second bearing 21 or the outer bearing ring and the rolling element of the second bearing 21, are removed from the pressure cylinder 2, so that only parts of the second bearing 21 remain on the second bearing point 22. However, this case is equated with the variant in which the second bearing 21 is removed from the pressure cylinder 2 together with the second support 20, since in this case the inner ring of the second bearing 21 remaining on the pressure cylinder 2 can be equated with a second bearing point 22.

[0032] However, these configurations are not essential for the present invention, especially since such decisions depend purely on the inner diameter of the sleeve 6, the size of the second bearing 21, the suitability of the second bearing 21 for pitching and / or the requirements of the second bearing 21 regarding the necessary fits of the inner ring and the outer ring.

[0033] While the second bracket 20, or the second bracket 20 together with the second bearing 21, or together with parts of the second bearing 21, is detached from the pressure cylinder 2, the pressure cylinder 2 is held exclusively by the first bearing 11, which remains mounted in the first bracket 10. In addition to the pressure cylinder 2 being mounted exclusively in the first bearing 11, it is also possible that in the Figures 2 to 6 Additional holders or supports not shown may be used for the cylinder journal located outside the first bearing 11.

[0034] This one-sided support of the printing cylinder 2 by the first bearing 11 and / or the unavoidable deflection, especially of printing cylinders 2 for large web widths or of very slim printing cylinders 2 with one-sided support, leads to the second bearing point 22 of the printing cylinder 2 assuming a different position when there is no second support 20 than when the printing cylinder 2 is supported on both sides.

[0035] Since a reference mark for restoring the double-sided support is useful to explain the procedure for the next steps in restoring the bearing of the printing cylinder 2 by the second bracket 20, the set position of the second bracket 20, which is achieved by adjusting the second bracket 20 by the axial stroke a and the adjustment path y compared to the position assumed when the printing cylinder 2 is supported on both sides, was shown in Fig. 3A dwell position 7 was inserted, which is located in Fig. 3 The position 7 was chosen such that it is the intersection of the left side of the second bearing 21 with the central axis of the second bearing 21 and thus with the central axis of the bearing bore of the second bracket 20. This dwell position 7 is to be regarded as the center of a coordinate system from which the subsequent adjustment paths are determined along the longitudinal axis 3 of the pressure cylinder 2 and perpendicular to it.

[0036] Fig. 4Figure 1 shows the state after the exemplary replacement of the sleeve 6, when the printing cylinder 2 is subsequently reattached to the second support 20. In a first process step, the second support 20 is adjusted by a first partial adjustment y1 perpendicular to the longitudinal axis 3 of the printing cylinder 2. This can be achieved by linear adjustment or by pivoting the second support 20. Since, due to the change in position of the second bearing point 22 described above, resulting from the one-sided support and / or deflection, the second bearing point 22 is lower by the change in position Δs than with double-sided support, the first partial adjustment y1 deviates from the original adjustment y; preferably, the first partial adjustment y1 deviates from the original adjustment y by the change in position Δs.

[0037] If the second support 20 has been pivoted downwards in the direction of gravity and the dwell position 7 is therefore below the longitudinal axis 3 of the pressure cylinder 2, the first partial adjustment y1 is smaller than the original adjustment y, preferably the first partial adjustment y1 is smaller than the original adjustment y by the change in position Δs. If the second support 20 has been pivoted upwards in the direction opposite to gravity and the dwell position 7 is therefore above the longitudinal axis 3 of the pressure cylinder 2, the first partial adjustment y1 is larger than the original adjustment y, preferably the first partial adjustment y1 deviates from the original adjustment y by the change in length Δs.

[0038] To restore the double-sided support of the pressure cylinder 2, in a second process step the second bracket 20 is adjusted by a first partial axial stroke a1 along the longitudinal axis 3 of the pressure cylinder 2 in the direction of the first bracket 10, wherein the first partial axial stroke a1 is smaller than the axial stroke a. This ensures that the second bracket 20 partially engages the second bearing 21, or that the second bearing 21 located in the second bracket 20 partially engages the second bearing point 22 of the pressure cylinder 2, thus establishing contact between the second bracket 20 and the second bearing 21 and / or between the second bearing 21 and the second bearing point 22.

[0039] In a third process step, the second bracket 20 is adjusted by a second partial adjustment y2 perpendicular to the longitudinal axis 3 of the pressure cylinder 2. Preferably, the second partial adjustment y2 is equal to the change in position Δs. This slightly raises the second bearing point 22 and thus the pressure cylinder 2 on the second side, so that the second bearing point 22 again assumes the position of a double-sided bearing. Furthermore, the bore of the second bracket 20 is again aligned with the longitudinal axis 3 of the pressure cylinder 2, so that either the second bearing 21 inserted in the second bracket 20 can be easily slid onto the second bearing point 22, or the second bracket 20 can be easily slid onto the second bearing 21, or a first part of the second bearing 21, which is located in the second bracket 20, can be easily slid onto the second part of the second bearing 21, which sits on the second bearing point 22.

[0040] In a fourth process step, the second bracket 20 is adjusted by a second partial axial stroke a2 in the extension of the longitudinal axis 3 of the pressure cylinder 2, so that the second bracket 20 fully accommodates the second bearing 21, or that the second bearing 21 located in the second bracket 20 fully accommodates the second bearing point 22 of the pressure cylinder 2, or that the second bearing 21 is fully reassembled.

[0041] Although the invention has been explained by means of the implementation of two partial adjustment paths, namely the implementation of a first partial adjustment path y1 and the implementation of a second partial adjustment path y2, it is nevertheless possible to implement the invention with more than two partial adjustment paths y1 and y2 until the second support 20 is again in the original position with the pressure cylinder 2 supported on both sides.

[0042] Although the invention has been explained by reference to the execution of two partial axial strokes, namely the execution of a first partial axial stroke a1 and the execution of a second partial axial stroke a2, it is also possible to carry out the invention with more than two partial axial strokes a1 and a2 until the second support 20 is again in the original position with the pressure cylinder 2 supported on both sides.

[0043] The second bracket 20 can be adjusted along the longitudinal axis 3 of the pressure cylinder 2 by means of an electric drive or a pneumatic drive or another drive.

[0044] The second bracket 20 can be adjusted in a direction perpendicular to the longitudinal axis 3 of the printing cylinder 2 either by a pivoting movement and / or by a linear movement.

[0045] Although not in the Figures 1 to 5As shown, it is also possible that when the second bracket 20 is adjusted by the first partial axial stroke a1 and / or when the second partial axial stroke a2 is adjusted, a sensor monitors the partial axial strokes a1, a2 and / or the adjustment force, so that the movement of the second bracket 20 is stopped if necessary. When the adjustment paths in the sense of partial axial strokes a1, a2 are detected, the distances traveled are recorded so that the adjustment can be stopped when the required intermediate position is reached. When the adjustment force is detected, a force sensor is used so that a [missing information] in the Figures 1 to 5The control system (not shown) can stop the partial axial strokes a1, a2 and / or the partial adjustment paths y1, y2 if the applied force exceeds the specified force. This can occur, for example, if the second bearing 21 is slightly offset or slightly tilted relative to the second bearing point 22, such that the second bearing 21 could only be pushed onto the second bearing point 22 with an unacceptably high force.

[0046] Although in the Figures 1 to 5If only one embodiment of a printing unit 1 is shown, in which the second bearing point 22 or the second bearing 21 of the printing cylinder 2 is released by adjusting the second support 20 in the direction of the longitudinal axis 3 of the printing cylinder 2, then an embodiment of a printing unit 1 is also possible in which, to make the printing cylinder 2 accessible, the printing cylinder 2 is adjusted by an axial stroke a in the extension of the longitudinal axis 3 to separate the printing cylinder 2 from the second support 20 in the direction of the first support 10, and in which the second support 20 is adjusted perpendicular to the longitudinal axis 3 of the printing cylinder 2 by an adjustment path y, so that the printing cylinder 2 is held only by means of a first support 10.

[0047] In this in the Figures 1 to 5In the case not shown in the drawing, in order to accommodate the printing cylinder 2, the second support 20 is adjusted in a first process step by a first partial adjustment path y1 perpendicular to the longitudinal axis 3 of the printing cylinder 2, wherein the first partial adjustment path y1 deviates from the adjustment path y.

[0048] In a second process step, the pressure cylinder 2 is adjusted by a first partial axial stroke a1 in the extension of the longitudinal axis 3 of the pressure cylinder 2, so that the second support 20 partially engages the second bearing 21 or that the second bearing 21 partially engages a second bearing point 22 of the pressure cylinder 2.

[0049] In a third process step, the second support 20 is adjusted by a second partial adjustment path y2 perpendicular to the longitudinal axis 3 of the pressure cylinder 2, and in a fourth process step the pressure cylinder 2 is adjusted by a second partial axial stroke a2 in the extent of the longitudinal axis 3, so that the second support 20 fully engages the second bearing 21 or that the second bearing 21 fully accommodates the second bearing point 22 of the pressure cylinder 2.

[0050] Because of the under Fig. 4 Due to the described change in position of the second bearing point 22 as a result of the one-sided support and / or the deflection, the second bearing point 22 is located lower by the change in position Δs than with support on both sides, the first partial adjustment path y1 also deviates from the original adjustment path y in this embodiment, preferably the first partial adjustment path y1 deviates from the original adjustment path y by the change in position Δs.

[0051] In the event that the second support 20 has been pivoted downwards in the direction of gravity and the dwell position 7 is thus below the longitudinal axis 3 of the pressure cylinder 2, the first partial adjustment path y1 is smaller than the original adjustment path y, preferably the first partial adjustment path y1 is smaller than the original adjustment path y by the change in position Δs.

[0052] In the event that the second support 20 has been pivoted upwards in the direction opposite to gravity and the dwell position 7 is thus above the longitudinal axis 3 of the pressure cylinder 2, the first adjustment path y1 is greater than the original adjustment path y, preferably the first partial adjustment path y1 deviates from the original adjustment path y by the change in length Δs.

[0053] The printing cylinder 2 can be adjusted along its longitudinal axis 3 by means of an electric drive, a pneumatic drive, a lateral register adjustment, or any other drive. The second support 20 can be adjusted in a direction perpendicular to the longitudinal axis 3 of the printing cylinder 2 either by a pivoting movement and / or a linear movement.

[0054] Although not in the Figures 1 to 5 As shown, in this design it is also possible that when the pressure cylinder 2 is adjusted by the first partial axial stroke a1 and / or when the second partial axial stroke a2 is adjusted, a sensor monitors the partial axial strokes and / or the adjustment force, so that if necessary the movement of the second bracket 20 is stopped.

[0055] Fig. 6 shows a printing cylinder 2 with a sleeve 6 applied to it according to the in Fig. 4The arrangement shown, in which the second support 20 has already been adjusted from the dwell position 7 by the first partial adjustment travel y1 and by the first partial axial stroke a1, so that the second bearing 21 rests against the second bearing point 22. In this respect, the Fig. 6 The depicted section of the printed work 1, all in the Figures 1 to 5 revealed characteristics.

[0056] In addition to the ones in the Figures 1 to 5 The features shown and disclosed here are in Fig. 6 A multi-position cylinder 4 is shown, which is operatively connected to the second bracket 20, such that the second bracket 20 is enabled by the multi-position cylinder 4 to perform at least the first partial axial stroke a1 and the second partial axial stroke a2. The fastening of the multi-position cylinder 4 on the side differing from the second bracket 20, as well as the arrangement of the multi-position cylinder 4, is shown in Fig. 6This is shown purely schematically; consequently, other arrangements and configurations are possible. Fig. 6 The mounting options shown for the multi-position cylinder 4 are possible.

[0057] For the in Fig. 4 Any commercially available multi-position cylinder 4 can be used with the multi-position cylinder 4 shown. This is a pneumatic or hydraulic cylinder consisting of several cylinders that are at least functionally separate, whose piston rods can extend individually, so that different positions can be reached depending on the control and stroke distribution.

[0058] The in Fig. 6The multi-position cylinder 4 shown is designed as an example of a three-position cylinder. This multi-position cylinder 4, designed as a three-position cylinder, has a position in which the right piston rod is extended due to the first partial axial stroke a1 already completed, whereas the left piston rod of the multi-position cylinder 4 is still retracted. To enable the second partial axial stroke a2 and thus to slide the second bearing 21 onto the second bearing position 22, the left piston rod of the multi-position cylinder 4 is extended.

[0059] Thus, it shows Fig. 6 An exemplary embodiment of a printing unit 1, in which the second support 20 is designed to execute a first partial axial stroke a1 and a second partial axial stroke a2. In the Fig. 6 In the illustrated version, this is required for the mounting of the pressure cylinder 2 by the second bracket 20.

[0060] Although not in Fig. 6 As shown, the second bracket can be operatively connected to a sensor, such as a force-sensing device. This allows the force required to slide the second bracket 20 onto the pressure cylinder 2, or the force applied for this purpose, to be detected. If a predetermined maximum permissible force is exceeded, the corresponding partial axial stroke can be terminated to prevent damage, for example, to the second bearing 21.

Claims

1. Method for automatically mounting a printing cylinder (2) of a printing unit (1) having a longitudinal axis (3) by means of a second bearing (21) in a second bracket (20), wherein, in a first embodiment, in order to make the printing cylinder (2) accessible, the second bracket (20) is adjusted by an axial stroke a in the direction of the longitudinal axis (3) of the printing cylinder (2) to expose a second bearing point (22) or the second bearing (21) and is adjusted perpendicular to the longitudinal axis (3) of the printing cylinder (2) by an adjustment distance y, wherein the printing cylinder (2) is held in a first bracket (10), and wherein, in a second embodiment, in order to make the printing cylinder (2) accessible, the printing cylinder (2) is adjusted by an axial stroke a in the direction of the longitudinal axis (3) to separate the printing cylinder (2) from the second bracket (20), and wherein the second bracket (20) is adjusted perpendicular to the longitudinal axis (3) of the printing cylinder (2) by an adjustment distance y is adjusted, whereby the printing cylinder (2) is held by means of a first bracket (10), wherein, in order to reposition the printing cylinder (2) by means of the second bracket (20), in a first step of the method, the second bracket (20) is adjusted by a first partial adjustment distance y1 perpendicular to the longitudinal axis (3) of the printing cylinder (2), wherein the first partial adjustment distance y1 deviates from the original adjustment distance y, wherein in a second process step in the first embodiment, the second bracket (20) is adjusted by a first partial axial stroke a1 in the direction of the longitudinal axis (3) of the printing cylinder (2), or wherein in the second embodiment, the printing cylinder (2) is adjusted by a first partial axial stroke a1 in the direction of the longitudinal axis (3) of the printing cylinder (2), wherein, in a third step of the method, the second bracket (20) is adjusted by a second partial adjustment distance y2 perpendicular to the longitudinal axis (3) of the printing cylinder (2) in a fourth step of the method in the first embodiment, the second bracket (20) is adjusted by a second partial axial stroke a2 in the direction of the longitudinal axis (3) of the printing cylinder (2), or, in the second embodiment, the printing cylinder (2) is adjusted by a second partial axial stroke a2 in the direction of the longitudinal axis (3).

2. Method according to claim 1, characterised in that the first partial adjustment distance y1 is smaller than the adjustment distance y.

3. Method according to claim 1, characterised in that the first partial adjustment distance y1 is greater than the adjustment distance y.

4. Method according to one of claims 1 to 3, characterised in that, in the first embodiment, the second bracket (20) is adjusted in the direction of the longitudinal axis (3) of the printing cylinder (2) by means of an electric drive or by means of a pneumatic drive, or, in the second embodiment, the printing cylinder (2) is adjusted in the direction of the longitudinal axis (3) by means of an electric drive or a pneumatic drive.

5. Method according to one of claims 1 to 4, characterised in that the second bracket (20) is adjusted in a direction perpendicular to the longitudinal axis (3) of the printing cylinder (2) either by means of a pivoting movement and / or by means of a linear movement.

6. Method according to one of claims 1 to 5, characterised in that the first partial axial stroke a1 and / or the second partial axial stroke a2 is detected by means of a sensor system and stopped if necessary.

7. Printing unit (1) comprising a first bracket (10) with at least one first bearing (11) for receiving a first bearing point (12) of a printing cylinder (2) with a longitudinal axis (3), and a second bracket (20) with at least one second bearing (21) for receiving a second bearing point (22) of the printing cylinder (2), wherein, in order to make the printing cylinder (2) accessible, the printing unit (1) is designed such that the second bracket (20) is first movable by an axial stroke a in the direction of the longitudinal axis (3) of the printing cylinder (2) to release the second bearing point (22) or the second bearing (21), and can then be adjusted perpendicular to the longitudinal axis (3) by an adjustment distance y, wherein the printing cylinder (2) is mounted in the first bracket (10), wherein the second bracket (20) is driven by a multi-position cylinder (4) to perform the axial stroke a and is designed to perform at least two partial axial strokes.

8. Printing unit (1) according to claim 7, characterised in that the multi-position cylinder (4) is a three-position cylinder.

9. Printing unit (1) according to one of claims 7 or 8, characterised in that the second bracket (20) is designed to perform a first partial axial stroke a1 and a second partial axial stroke a2.

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