CN111908241A

CN111908241A - Printing machine with stacking device equipped with vibrating plate

Info

Publication number: CN111908241A
Application number: CN202010380832.6A
Authority: CN
Inventors: M·莱瓦; E·克莱因; P·尼古拉; F·瓦伦魏因
Original assignee: Heidelberger Druckmaschinen AG
Current assignee: Heidelberger Druckmaschinen AG
Priority date: 2019-05-08
Filing date: 2020-05-08
Publication date: 2020-11-10
Anticipated expiration: 2040-05-08
Also published as: DE102020107434A1; CN111908241B

Abstract

The invention relates to a printing press comprising a stacking device having a vibration plate (6) which can be adjusted from a horizontal position to an inclined position, wherein at least one first vibration stop (23) is connected to the vibration plate (6) and the stack of sheets (B) rests on the first vibration stop during vibration. The lifting platform (8) is arranged, the lifting platform and the vibration plate (6) are adjustable along the vertical direction (z) through a chain driver (11), wherein a first vibration stopping part (23) is connected with the vibration plate (6) in a sliding motion mode or a sliding hinge mode; and the first shock stop (23) is supported on a support carried by the lifting table (8).

Description

Printing machine with stacking device equipped with vibrating plate

Technical Field

The invention relates to a printing press comprising a stacking device with a vibration plate which can be adjusted from a horizontal position to an inclined position, wherein at least one first vibration stop element is connected to the vibration plate, on which the stack of sheets rests during vibration (Rnuteln).

Background

Such a printing press is described in DE 102017215360 a1, wherein the problem of the necessity of adapting the effective stop length of the seismic stop on the seismic plate to the cumulative height of the sheet stack is not yet recognized. The first shock stop (here the front stop) can be movably (in particular pivotably) fastened to the stack carrier, which serves as a shock plate, for reasons not mentioned in detail. Nevertheless, the effective stop length is a compromise which is designed for a moderate stack height and only works optimally in this case.

Documents DD 289256 a5, DE 19514850 a1 and DE 102017209555 a1 constitute further prior art.

Disclosure of Invention

The object of the invention is to provide a printing press with a stacking device whose shock stops function optimally over the entire stacking height.

This object is achieved according to the invention by a printing press comprising a stacking device with a vibration plate which can be adjusted from a horizontal position to an inclined position, wherein at least one first vibration stop is connected to the vibration plate, on which the stack of sheets rests when vibrated, characterized in that a lifting table is provided, which is displaceable/adjustable (vertellbar) in the vertical direction by means of a chain drive together with the vibration plate, the first vibration stop being connected to the vibration plate in a slidably movable manner (schubbeweglich) or in a sliding articulated manner (schubgelkig); and the first shock stop is supported on a bracket carried by the lift table.

The advantage of the printing press according to the invention is that the effective stop length of the first shock stop increases directly in proportion to the stack height.

Different modifications are possible:

the first shock stop can be adapted to the cumulative stack height of the stack of sheets on the shock plate by lowering the shock plate and pushing it further upward from the shock plate by its support.

The first shock stop may be slidably or slidably hingedly connected to the shock plate by a sleeve or other linear guide.

The support can be either a carrier support, which is fixedly connected to the lifting table, or a chassis (fahrgestelll), which is movable on the lifting table together with the seismic plate by means of guides.

The diaphragm may be connected to the lifting platform by a screw drive (Spindeltriebe) or other lifting drive for lifting the diaphragm and by a universal joint.

The universal joint may have a first axis of rotation and a second axis of rotation, wherein the second axis of rotation extends orthogonally with respect to the longitudinal direction; and wherein the first axis of rotation is swingable about the second axis of rotation together with the diaphragm.

At least one of additional devices in the form of a clamp (Klemme), a sensor and a blowing device may be provided on the first shock stop.

The additional device can be adjustable together with the first shock stop and can therefore be adapted to different size page stacks.

At least one second shock stop element is connected to the shock plate (6) in a sliding or sliding-hinged manner, and the sheet stack rests on the second shock stop element when shocking, wherein the second shock stop element is supported on the support.

The first shock stop may be a side stop and/or the second shock stop may be a front stop.

Drawings

The improvement also results from the following description of the embodiments and the figures, in which:

fig. 1 to 3: stacking devices with a vibrating plate at different settings;

FIGS. 4 and 5: a spatial view of the stacked apparatus;

fig. 6 to 7: stacking devices at different heights for stacking sheets;

FIG. 8: a stacking apparatus having a settled shock stop;

fig. 9 to 11: a sheet stopper on the vibration plate equipped with various additional devices;

FIG. 12: a spatial view of a shock plate with page stops;

fig. 13 to 19: different stages of automated removal of the stack of sheets from the vibratory plate; and

fig. 20 to 22: a modification of the stacking device with a vibrating plate in different settings.

Elements which correspond to one another in fig. 1 to 22, which are shown more or less schematically, are denoted by the same reference numerals.

Detailed Description

Fig. 1 shows a part of a printing press 1 for inkjet or offset printing, comprising a receiver 2, the receiver 2 having a chain conveyor 3, the chain conveyor 3 having gripper bridges 4 for conveying printed sheets in a conveying direction T to a stacking device 5. The sheets to be fed are stacked on a seismic plate 6 (not shown here together), the seismic plate 6 being arranged on a base frame 7, the base frame 7 being arranged on a lifting table 8. The chassis 7 may be generally denoted as a stand 7.

The seismic plate 6, and thus the stack of sheets thereon, is moved by a vibrator or other oscillatory drive in order to assist in the orientation of the sheets on the seismic plate 6 at the at least one front stop 9 (and preferably a plurality of front stops 9) and at the at least one side stop 23 (and preferably a plurality of side stops 23) (see fig. 12). These front and

side stoppers

9, 23 are sometimes referred to hereinafter as

shock stoppers

9, 23.

In fig. 4 a cartesian coordinate system is introduced, which shows a longitudinal direction x, a transverse direction y and a vertical direction z. The longitudinal direction x is parallel to the transport direction T.

Fig. 1 furthermore shows a guide 10, for example with rolling bodies, for the movement of the chassis 7 together with the seismic plate 6 on the lifting table 8 along and against the longitudinal direction x. In order to raise and lower the lifting table 8 in and against the vertical direction z, a chain drive 11 with a motor is used. With the diaphragm 6 oriented horizontally according to fig. 1 and 4, the front stops 9 of the diaphragm 6 are aligned with front stops 12 on the frame 13 that are separate and independent with respect to the diaphragm 6, or (in the preferred case with respective front stops 9, 12) the front stops 9 of the diaphragm 6 are aligned with the front stops 12 on the frame 13 that are separate and independent with respect to the diaphragm 6.

The following description refers to variants with a plurality of front stops 9, a plurality of front stops 12 and a plurality of side stops 23, but in a retroactive sense also has the same effectiveness for variants with only one

stop

9, 12 and 23 each.

Fig. 4 shows: the vibration plate 6 is connected to the chassis 7 via a universal joint 14 and a screw drive 15 serving as a lifting drive. The universal joint 14 has a first axis of rotation 16 and a second axis of rotation 17, which first axis of rotation 16 and second axis of rotation 17 may be formed by a universal joint pin.

With the diaphragm 6 oriented horizontally according to fig. 1 and 4, the first axis of rotation 16 is oriented along the longitudinal direction x. The second axis of rotation 17 is always oriented in the transverse direction y (not only with the diaphragm 6 oriented horizontally but also obliquely). This orientation of the axes of

rotation

16, 17 is brought about by means of, for example, fork-

shaped holding parts

18, 19, by means of which holding

parts

18, 19 the axes of

rotation

16, 17 are connected to the diaphragm 6 (or chassis 7). Here, an upper holder 18, which holds the first rotation axis 16 by its two prongs, is fixedly connected to the diaphragm 6, and a lower holder 19, which holds the second rotation axis 17 by its two prongs, is fixedly connected to the chassis 7.

The screw drives 15 are preferably arranged uniformly distributed on a virtual circle, in the case of preferably three screw drives 15 in total, at an angular distance of 120 ° from one another, in the center of which a universal joint is arranged. Each screw driver 15 comprises a bolt 20, a nut 21 and a motor 22. Each screw driver 15 may be configured as a ball circulation type screw (Kugelumlaufspindel). A single-stage gear system, for example, can be provided between the motor 22 and the screw 20.

Fig. 2 and 5 show: the screw drives 15 are moved out of the way from one another, so that the seismic plate 6 oscillates not only about the first axis of rotation 16 but also about the second axis of rotation 17 and is tilted downward for one of the plate angles. In the case of adjustment of the seismic plate 6 into a double (or multi-axis) tilt position, the motors 22 of the spindle drives 15 are actuated in a coordinated manner by the electronic control unit.

Fig. 2 shows: due to the pendulum movement S of the seismic plate 6 about the second axis of rotation 17 which is achieved with an inclined orientation of the seismic plate 6, the front stop 9 on the seismic plate 6 can, without corresponding measures, be misaligned or misaligned with a separate (or external) front stop 12 on the frame 13 relative to the seismic plate 6, whereby a misalignment a in the longitudinal direction x can occur between the front stop 9 and the front stop 12. As a corresponding measure, a compensation of the offset a takes place, wherein the chassis 7 together with the seismic diaphragm 6 and its front stop 9 are moved in the guides 10 against the longitudinal direction x from the position according to fig. 2 to the position according to fig. 3. This displacement movement V effected relative to the lifting table 8 is indicated in fig. 2 by an arrow. If the seismic plate 6 is oriented horizontally again from its tilted position and is pivoted in this case against the direction of rotation indicated by "S", a reversed offset compensation takes place. Here, the chassis 7 is moved along the longitudinal direction x together with the diaphragm 6 to compensate for the misalignment.

As can be seen in fig. 3, after compensation is achieved, the front stop 9 of the diaphragm 6 is at least flush with the front stop 12 of the frame 13, although not aligned straight. In this case, the upper edge of the side of the respective front stop 9 facing the sheet stack B is held in the plane of the side of the cooperating front stop 12 facing the sheet stack B. The upper edge thus represents a so-called momentary vertex (momentin-Pol) for the control of the base frame 7. Thereby it is ensured that: the front edge of each sheet falling onto the sheet stack B is guided without any space by the side of the front stop 12 of the machine frame 13 facing the sheet stack B onto the side of the front stop 9 of the oscillating plate 6 facing the sheet stack B.

Fig. 6 shows an example of the side stop 23: these shock stops 9, 23 are guided as linear guides by a respective sleeve 24. By the sleeve 24 protruding far enough from the diaphragm 6 in the lower part, a large sleeve length and thus guiding stability can be achieved. The sleeve 24 does not protrude from the seismic plate 6 (or its sheet receiving surface 36) at the top, so that the stack of sheets can be pulled off the seismic plate 6 in the lateral direction without hindrance.

The shock stops (or side stops) 23 are each hingedly connected via a coupling 25 to a base 26, which base 26 is supported on the chassis 7 and slides or rolls thereon. By means of the coupling 25 it is possible to perform a balanced movement between the shock stop and its seat 26 in the case of an inclined position of the shock plate 6, wherein the shock stop tips over from the vertical direction z. The above-described supports (sleeve, coupling, seat) of the side stop 23 are also present for the front stop 9, but are not shown together in fig. 1 to 3 for reasons of drawing simplicity.

By means of the screw drives 15, they are moved in synchronously with one another, so that the obliquely arranged seismic plate 6 is lowered relative to the base frame 7 and relative to the lifting table 8, as a result of which the side stops 23 and the front stop 9 emerge from the seismic plate 6 at the top as a function of the increasing height of the sheet stack B during the final printing. In the case of the lowering of the seismic plate 6, therefore, no active supplementary guidance (aktive nachfufuhung) of the

seismic stops

9, 23 is required, and no inherent servo drive is required for the height adaptation of the

seismic stops

9, 23, which is advantageous for cost reasons. Furthermore, this is more functionally reliable, since otherwise there is a risk of drive failure due to the transmitted vibrations with its own inherent servo drives (which are attached to the vibration plate 6). The upper edges of these shock stops 9, 23 can be considered as fixed in place (ortsfest). Furthermore, the drop height between the chain conveyor 3 and the sheet stack B is kept constant for the sheets that drop in sequence from the chain conveyor 3 onto the sheet stack B by the inward movement of the screw drives 15. In the case where these screw drivers 15 move in simultaneously during the main printing, the lifting table 8 is stationary.

Outside of the actual printing, the electronic control unit can drive the motors 22 of the spindle drives 15 in coordination with the motors of the chain drives 11 in such a way that a superposition of the vertical displacement movements of the seismic plate 6 and the lifting table 8 results therefrom. In this way different movement patterns can be generated. For example, the shock stops 9, 23 can be moved into the shock plate 6 (or lowered into the shock plate 6), without the shock plate 6 performing a vertical movement.

Fig. 6 shows a running situation with a low sheet stack B, while fig. 7 shows a running situation with a high sheet stack B, wherein the drop height is the same in both running situations.

Fig. 8 shows the following operating situation: in this operating situation, the seismic diaphragm 6 is raised by the screw drive 15 to such an extent that the seismic stops 9, 23 (the side stops 23 are shown here by way of example) are pulled back in the sleeves 24 (or in other types of linear guides applied at the location of the sleeves 24) to such an extent that they settle out and no longer protrude beyond the receiving surface 36 of the seismic diaphragm 6 carrying the sheet stack B. Such a deep lowering is at least necessary for the side stops 23, since the sheet stack B is pulled off the seismic plate 6 beyond these side stops 23. Deep settling is no longer mandatory for the front stop 9. It can be seen that in this operating situation the guide belonging to the lower holder 19 (which guide can be configured in the form of a telescope for this purpose) is moved far upwards.

Fig. 9 shows: these shock stops 9, 23 are equipped with clamps 27 for clamping the sheet stack B on the shock plate 6. The gripper 27 is operable by a first actuator (for example in the form of a pneumatic cylinder 28) and is configured as a lever which is rotatably supported in the shock stop. The lifted sheet stack B is pressed against a lever arm, while the working cylinder 28 acts on the other lever arm. Preferably, a plurality of shock stops 9, 23 (e.g. each side stop 23) are each provided with such a clamp 27. A projection 43, for example in the form of a transverse pin, is provided on the

shock stop

9, 23. When the seismic plate 6 with the sheet stack B is raised, the latter (sheet stack B) impacts on the gripper 27 from below if the gripper 27 is in the clamping position. As the raising continues, the

shock stop

9, 23 is thereby moved upwards by the clamp 27 until the projection 43 strikes the lock 45. The lock 45 can be pivoted by a second actuator from a locking position into a release position, as is indicated in the drawing by a dot-dash line. In the locking position, the lock 45 locks the shock stops 9, 23, preventing the raising of the shock stops 9, 23. The second actuator may be configured as a pneumatic cylinder 44. The protrusion 43 lifts the lock 45 from the sensor 46 when it moves upward. The sensor 46 thus signals to the electronic controller: the sheet stack B is stopped from below against the shock stops 9, 23.

If at least two lift-off shock stops 9, 23 are equipped with a sensor-type monitoring clamp 27 of this type, an undefined height of the uneven sheet stack B can be reliably clamped thereby. The two clamps 27 of the shock stops 9, 23 can be fitted such that the clamp 27 that is in first contact with the stack (first clamp 27) is unlocked by pulling back the lock 45. For this purpose, the control unit accordingly actuates the working cylinder 44 of the gripper 27. The first gripper 27 grips the sheet stack B by its own weight after unlocking and continues to move upward. This occurs so long until the second clamp 27 is also in contact with the stack surface and is raised slightly, which is recognized by the sensor 46 of the second clamp 27 and signaled to the controller. As soon as this occurs and the sheet stack B is fixed by the two clamps 27, the upward movement of the vibration plate 6 together with the sheet stack B is stopped by the controller. In the method, the sensor 46 identifies the moment for unlocking the first gripper 27 and the moment for stopping the upward movement of the second gripper 27.

Fig. 10 shows: a sensor 29 for detecting the sheet stack B is integrated into the shock stops 9, 23. Sensors 29 fixed to the shock stops 9, 23 measure the height of the sheet stack B and are preferably contactless (e.g. optical) sensors 29. Based on the signals of the sensor 29, the electronic control unit drives the motors 22 of the spindle drives 15 and, in certain operating situations, the motor that raises the lifting table 8 by means of the chain drive 11.

Fig. 11 shows a blowing device 30, which blowing device 30 is arranged on the shock stops 9, 23 and blows air into the sheet stack B to be shocked. These air cushions blown at least between the upper sheets of the sheet stack B cause: these sheets slide well on each other when jarred. The blowing device 30 integrated into the shock stops 9, 23 comprises a blowing chamber 40 in the shock stops 9, 23. The blow chamber 40 has a pressurized air connection 31 and, in its wall facing the sheet stack B, blow openings 32, which blow openings 32 are configured as nozzle bores and are arranged in an array extending in the vertical direction z. Instead of the nozzle bores, a plurality of apertures or a single aperture can also be provided. Preferably, a plurality of shock stops 9, 23 (for example each side stop 23) are each equipped with such a blowing device 30.

For all three additional devices (gripper 27, sensor 29, blowing device 30) shown in fig. 9 to 11, these additional devices can be arranged together on the

same shock stop

9, 23, with the advantage that: when the vibration stops 9, 23 are set to the specification of the sheet to be processed, the corresponding additional devices are set to the specification. In addition, the following advantages exist: by means of the sensor 29, the gripper 27 and/or the blowing device 30 (depending on what is arranged on the shock stops 9, 23 together with the sensor 29) can be held in a constant position relative to the upper edge of the sheet stack B.

Fig. 12 shows: a pressure piece 33 is provided on the side of the sheet stack B opposite the side stop 23 for pressing at least the lower sheet of the sheet stack B against the side stop 23. The pressure piece 33 may have the shape of a small plate and in each case has a flat surface 34 as the pressure surface. The pressure piece 33 can be loaded by the force of a spring and/or can be adjusted by an actuator. The precision of the stack geometry is improved by the pressure piece 33, which is advantageous in particular when: when a plurality of sheets are stored once (e.g. by an auxiliary stack carrier) onto the vibratory plate 6. The pressure pieces 33 can be adjusted to the sheet format and can be lowered or removed from the seismic plate 6 for stacking in the seismic plate 6. A plurality of such compacts 33 can be arranged side by side. Furthermore, one or more pressure pieces of this type can be arranged on the side of the sheet stack B opposite the front stop 9 for pressing the sheets against the front stop 9. These shock stops 9, 23 are shown in fig. 12 (and also in fig. 1-3 and 20-22) in a simplified manner without the sleeve 24.

Fig. 13 to 19 show the sequential steps of the method for removing the stack B of sheets, which has been shaken and is oriented here by the shake stops (front stop 9, side stop 23), from the shake plate 6 by means of the gripper 35. Furthermore, devices are shown therein, with which the method can be carried out automatically.

Fig. 13 shows the initial situation after a shock. The stack of sheets B lies for the most part on the receiving surface 36 of the seismic plate 6 and with its edge projecting laterally beyond the receiving surface 36 on a support plate 37, which support plate 37 is in a vertical position flush with the receiving surface 36.

Fig. 14 shows: the gripper 35 is adjusted above the area of the support plate 37 without the sheet stack B from a horizontal position remote from the sheet stack B to a horizontal position close to the sheet stack B.

Fig. 15 shows: the supporting plate 37 is configured as an edge element which can be lowered completely to a height below the receiving surface 36 and is connected to at least one lifting element 38. The lifting element 38 can be an active force element, for example a working cylinder as a servo drive, for raising and lowering the support plate 37. In the example shown, the lifting element 38 is a passive force element in the form of a return spring, for example a helical spring or a gas pressure spring. The lowering of the support plate 37 is effected by the downward vertical movement of the gripper 35, as a result of which the gripper 35 presses the support plate 37 downward against the restoring force of the lifting element 38 to such an extent that the lower clamping jaw 39 of the gripper 35 reaches a height below the receiving surface 36 and thus below the sheet stack B.

Fig. 16 shows: in the next step, gripper 35 is moved horizontally toward sheet stack B, whereupon sheet stack B is introduced into gripper 35 and gripper jaws 39 act on sheet stack B from below.

Fig. 17 shows: the gripper 35 is closed and the sheet stack B is thereby clamped between the lower jaw 39 and the upper jaw of the gripper 35. With the gripper 35 closed, only one jaw (e.g. the upper jaw) may be moved, or both jaws may be moved in the case of a jaw gripper.

Fig. 18 shows: the gripper 35 with the stack edge clamped therein is moved upwards and the lifting element 38 adjusts the support plate 37 upwards again into a position in which it forms a common plane with the receiving surface 36.

Fig. 19 shows the final step, in which gripper 35 is moved horizontally away from vibration plate 6 and thus pulls the clamped stack B of sheets off vibration plate 6, with stack B sliding on receiving surface 36 and on support plate 37 engaging receiving surface 36.

Fig. 20 to 22 show a modification which differs from the exemplary embodiment shown in fig. 1 to 19 and described here only in two respects: on the one hand, the undercarriage 7 is replaced by a support bracket 41, which support bracket 41 is fixedly connected to the lifting table 8 and is immovable. On the other hand, the front stopper 12 (or the plurality of front stoppers 12) is not fixedly provided on the frame 13 but is provided on the frame 13 to be displaceable by the guide 42. In this variant, the offset a is not compensated for by a horizontal displacement of the support, as in the exemplary embodiment of fig. 1 to 19, but rather by a stop displacement. In this variant, the or each front stop 12, which is separate and independent with respect to the diaphragm 6, is displaced with a linear movement L along the longitudinal direction x. If the guide 42 is a linear guide, the linear movement L is determined by this guide 42. Otherwise, if the or each front stop 12 is connected to the frame 13 via a rotary joint and not via the guide 42, the linear movement L may be a component of a swinging movement.

In a variant not shown in the drawing, it is neither necessary for the front stop 12, which is separate and independent, to be displaceable nor for the chassis 7 to be able to be displaced, and for the compensation of the offset a, the front stop 9 is moved along the receiving surface 36 on the seismic plate 6 in a motorized manner. In this case, the sheet stack B on the receiving surface 36 is pushed along, which can be conveyed by means of blowing nozzles in the receiving surface 36, which generate a sliding air cushion between the receiving surface 36 and the sheet stack B.

List of reference numerals:

1 printing machine

2 Material collector

3 chain conveyor

4 grabber bridge

5 Stacking apparatus

6 vibrating plate

7 underframe

8 lifting platform

9 front stop

10 guide piece

11 chain drive

12 front stop

13 frame

14 universal joint

15 screw driver

16 first rotation axis

17 second axis of rotation

18 holder

19 holder

20 bolt

21 nut

22 motor

23 side stop

24 sleeve

25 coupling piece

26 base

27 clamping device

28 working cylinder

29 sensor

30 blowing device

31 pressure air interface

32 air blowing opening

33 briquetting

34 plane

35 grabber

36 containing surface

37 support rail

38 lifting element

39 clamping jaw

40 air blowing cavity

41 bearing support

42 guide piece

43 projection

44 working cylinder

45 locking device

46 sensor

Dislocation A

B sheet stack

L linear motion

S swing motion

T direction of conveyance

V movement

x longitudinal direction

y transverse direction

z vertical direction

Claims

1. A printing press comprising a stacking device (5) having a vibration plate (6) which can be adjusted from a horizontal position to an inclined position,

wherein at least one first shock stop (23) is connected to the shock plate (6) and against which the sheet stack (B) rests during shock,

it is characterized in that the preparation method is characterized in that,

provided with a lifting table (8) which can be adjusted together with the vibration plate (6) by means of a chain drive (11) in the vertical direction (z),

the first shock stop (23) is connected to the shock plate (6) in a slidable or sliding-hinged manner and

the first shock stop (23) is supported on a support (7, 41) carried by the lifting table (8).

2. The printing press as set forth in claim 1,

it is characterized in that the preparation method is characterized in that,

the first shock stop (23) is adapted to the cumulative stack height of the stack of sheets (B) on the shock plate (6) in such a way that the shock plate (6) is lowered and is pushed further out of the shock plate (6) upwards by the support of the first shock stop (6).

3. A printing press according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the first shock stop (23) is connected to the shock plate (6) by means of a sleeve (24) or other linear guide in a sliding or sliding articulated manner.

4. Printing press according to one of claims 1 to 3,

it is characterized in that the preparation method is characterized in that,

the support (7) is either a support (41) which is fixedly connected to the lifting table (6) or a base frame (7) which can be moved together with the seismic plate (6) on the lifting table (6) by means of a guide (10).

5. Printing press according to one of claims 1 to 4,

it is characterized in that the preparation method is characterized in that,

the vibration plate (6) is connected with the lifting platform (8) through a screw driver (15) or other lifting drivers for lifting the vibration plate (6) and through a universal joint (14).

6. A printing press according to claim 5, wherein,

it is characterized in that the preparation method is characterized in that,

the universal joint (17) has a first axis of rotation (16) and a second axis of rotation (17),

the second axis of rotation (17) extends orthogonally with respect to the longitudinal direction (x) and

the first axis of rotation (16) can be pivoted about a second axis of rotation (17) together with the diaphragm (6).

7. Printing press according to one of claims 1 to 6,

it is characterized in that the preparation method is characterized in that,

at least one of additional devices (27, 29, 30) in the form of a clamp (27), a sensor (29) and a blowing device (30) is arranged on the first shock stop (23).

8. The printing press as set forth in claim 7,

it is characterized in that the preparation method is characterized in that,

the additional device (27, 29, 30) can be adjusted together with the first shock stop (23) and can thus be adapted to different sheet stacks (B).

9. Printing press according to one of claims 1 to 8,

it is characterized in that the preparation method is characterized in that,

at least one second shock stop (9) is connected to the shock plate (6) in a sliding or sliding-hinged manner, said second shock stop resting on the stack of sheets (B) during shock and against which the stack of sheets (B) rests during shock

The second shock stop (9) is supported on a bracket (7, 41).

10. The printing press as set forth in claim 9,

it is characterized in that the preparation method is characterized in that,

the first shock stop (23) is a side stop (23), and/or

The second shock stop (9) is a front stop (9).