DE102020107434A1 - Printing machine with a stacking device with a vibrating plate - Google Patents

Abstract

A printing machine comprises a stacking device with a vibrating plate (6) which can be adjusted from a horizontal position to an inclined position, with at least one first vibrating stop (23), against which the sheet stack (B) rests when vibrating, is connected to the vibrating plate (6) . There is a lifting platform (8) which, together with the vibrating plate (6), can be adjusted in the vertical direction by a chain drive (11), the first vibrating stop (23) being connected to the vibrating plate (6) such that it can be pushed or articulated, and the the first vibration stop (23) is supported on a frame carried by the lifting platform (8).

Description

The present invention relates to a printing machine comprising a stacking device with a vibrating plate which can be adjusted from a horizontal position to an inclined position, with at least one first vibrating stop, against which the stack of sheets rests when vibrating, being connected to the vibrating plate.

Such a printing machine is in the DE 10 2017 215 360 A1 described, wherein the problem of the need to adapt the effective stop length of a vibrating stop on the vibrating plate to the increasing height of a stack of sheets has not yet been recognized. The first vibrating stop - here a front stop - can be displaceably, in particular pivotably, fixed to the stack carrier, which functions as a vibrating plate, for reasons not specified in detail. Nevertheless, the effective stop length is a compromise that is designed for a medium stack height and only works optimally with this.

Further prior art form the DD 289 256 A5 , DE 195 14 850 A1 and DE 10 2017 209 555 A1 .

The object of the invention is to create a printing machine with a stacking device, the vibration stop of which functions optimally over the entire stack height range.

This object is achieved according to the invention by a printing machine comprising a stacking device with a vibrating plate which can be adjusted from a horizontal position to an inclined position, with at least one first vibrating stop, against which the stack of sheets rests when vibrating, being connected to the vibrating plate, characterized in that a lifting platform is available which, together with the vibrating plate, can be adjusted in the vertical direction by a chain drive,
that the first vibrating stop is connected to the vibrating plate so that it can be pushed or pushed, and
that the first vibration stop is supported on a frame carried by the lifting platform.

One advantage of the printing press according to the invention is that the effective stop length of the first jogging stop increases in direct proportion to the stack height.

• Der erste Rüttelanschlag kann an eine anwachsende Stapelhöhe eines Bogenstapels auf der Rüttelplatte angepasst werden, indem die Rüttelplatte abgesenkt und dabei durch die Abstützung des ersten Rüttelanschlags dieser aus der Rüttelplatte weiter nach oben herausgeschoben wird.
• Der erste Rüttelanschlag kann über eine Buchse oder andere Linearführung mit der Rüttelplatte schubbeweglich oder schubgelenkig verbunden sein.
• Das Gestell kann entweder ein Traggestell, das mit der Hebebühne fest verbunden ist, oder ein Fahrgestell, das zusammen mit der Rüttelplatte über eine Führung auf der Hebebühne verfahrbar ist, sein.
• Die Rüttelplatte kann über Spindeltriebe oder andere Hubantriebe zum Anheben der Rüttelplatte und über ein Kardangelenk mit der Hebebühne verbunden sein.
• Das Kardangelenk kann eine erste Drehachse und eine zweite Drehachse aufweisen, wobei die zweite Drehachse relativ zu einer Längsrichtung orthogonal verläuft, und wobei die erste Drehachse zusammen mit der Rüttelplatte um die zweite Drehachse schwenkbar ist.
• An dem ersten Rüttelanschlag kann mindestens eine von Zusatzvorrichtungen in Form einer Klemme, eines Sensors und einer Blasvorrichtung angeordnet sein.
• Die Zusatzvorrichtung kann zusammen mit dem ersten Rüttelanschlag verstellbar und dadurch an verschiedengroße Bogenstapel anpassbar sein.
• Mit der Rüttelplatte (6) kann mindestens ein zweiter Rüttelanschlag, an dem der Bogenstapel beim Rütteln anliegt, schubbeweglich oder schubgelenkig verbunden sein, wobei der zweite Rüttelanschlag auf dem Gestell abgestützt ist.
• Der erste Rüttelanschlag kann ein Seitenanschlag sein und/oder der zweite Rüttelanschlag kann ein Vorderanschlag sein.

Various training courses are possible:

• The first vibrating stop can be adapted to an increasing stack height of a stack of sheets on the vibrating plate by lowering the vibrating plate and pushing it further up out of the vibrating plate due to the support of the first vibrating stop.
• The first vibrating stop can be connected to the vibrating plate in a thrust-movable or thrust-articulated manner via a bushing or other linear guide.
• The frame can either be a support frame that is firmly connected to the lifting platform, or a chassis that can be moved together with the vibrating plate via a guide on the lifting platform.
• The vibrating plate can be connected to the lifting platform via spindle drives or other lifting drives for lifting the vibrating plate and via a cardan joint.
• The cardan joint can have a first axis of rotation and a second axis of rotation, the second axis of rotation running orthogonally relative to a longitudinal direction, and the first axis of rotation being pivotable together with the vibrating plate about the second axis of rotation.
• At least one of additional devices in the form of a clamp, a sensor and a blowing device can be arranged on the first vibration stop.
• The additional device can be adjusted together with the first jogger stop and can therefore be adapted to different-sized stacks of sheets.
• With the vibrating plate ( 6th ) at least one second vibrating stop, against which the stack of sheets rests when vibrating, can be connected in a push-movable or push-jointed manner, the second vibrating stop being supported on the frame.
• The first jogging stop can be a side stop and / or the second jogging stop can be a front stop.

• 1 bis 3: eine Stapelvorrichtung mit einer Rüttelplatte in verschiedenen Einstell ungen,
• 4 und 5: die Stapelvorrichtung in räumlicher Darstellung,
• 6 bis 7: die Stapelvorrichtung bei verschiedenen Bogenstapelhöhen,
• 8: die Stapelvorrichtung mit versenkten Rüttelanschlägen,
• 9 bis 11: Bogenanschläge an der Rüttelplatte, ausgerüstet mit verschiedenen Zusatzvorrichtungen,
• 12: die Rüttelplatte mit den Bogenanschlägen in räumlicher Darstellung,
• 13 bis 19: verschiedene Phasen des automatisierten Entfernens des Bogenstapels von der Rüttelplatte und
• 20 bis 22: eine Modifikation der Stapelvorrichtung mit der Rüttelplatte in verschiedenen Einstellungen.

Developments can also be found in the following description of an exemplary embodiment and the associated drawing, in which:

• 1 to 3 : a stacking device with a vibrating plate in various settings,
• 4th and 5 : the stacking device in a spatial representation,
• 6th to 7th : the stacking device for different sheet stacking heights,
• 8th : the stacking device with recessed vibration stops,
• 9 to 11 : Sheet stops on the vibrating plate, equipped with various additional devices,
• 12 : the vibrating plate with the arch stops in a spatial representation,
• 13 to 19th : different phases of the automated removal of the stack of sheets from the vibratory plate and
• 20th to 22nd : a modification of the stacking device with the vibrating plate in different settings.

In the more or less schematic 1 to 22nd Corresponding elements are denoted by the same reference symbols.

1 shows parts of a printing machine 1 for inkjet or offset with one delivery 2 holding a chain conveyor 3 with gripper bridges 4th for transporting printed sheets in one transport direction T to a stacking device 5 having. The laid out sheets form a stack on a vibrating plate - not shown here in the drawing 6th that are on a chassis 7th is arranged, which is on a lifting platform 8th is arranged. The chassis 7th can be generalized as a rack 7th are designated.

The vibrating plate 6th and thus the stack of sheets thereon are moved by a vibrator or other oscillating drive in order to align the sheets with at least one front stop 9 and preferably several front stops 9 and on at least one side stop 23 and preferably several side stops 23 (please refer 12 ) on the vibrating plate 6th to support. The front stops 9 and side stops 23 are sometimes referred to below as vibration stops 9 , 23 designated.

In 4th a Cartesian coordinate system is entered that shows the longitudinal direction x , Cross direction y and vertical direction z indicates. The longitudinal direction x is with the transport direction T parallel.

1 continues to show guides 10 , z .B. with rolling elements, for moving the chassis 7th including the vibrating plate 6th on the lift 8th in and against the longitudinal direction x . For raising and lowering the lift 8th in and against the vertical direction z a chain drive is used 11 with motor. With according to 1 and 4th horizontally aligned vibrating plate 6th the front stop is aligned 9 the vibrating plate 6th with one of the plate compactors 6th separate front stop 12 on a machine frame 13 or - in the preferred case with several front stops 9 , 12 - the front stops are aligned 9 the vibrating plate 6th with the front stops that are separate from it 12 on the machine frame 13 .

The following description refers to the variant with several front stops 9 , several front stops 12 and several side stops 23 , but also applies in a figurative sense to the variants with only one stop each 9 , 12 and 23 .

4th shows that the plate compactor 6th via a universal joint 14th and spindle drives used as lifting drives 15th with the chassis 7th connected is. The universal joint 14th has a first axis of rotation 16 and a second axis of rotation 17th that can be formed by pivot pins.

With according to 1 and 4th horizontally aligned vibrating plate 6th is the first axis of rotation 16 longitudinal x oriented. The second axis of rotation 17th is always - both with horizontally and diagonally aligned vibratory plate 6th - in the transverse direction y oriented. These orientations of the axes of rotation 16 , 17th are by holder 18th , 19th , z .B. in fork shape, causes over which the axes of rotation 16 , 17th with the vibrating plate 6th or the chassis 7th are connected. Here is the upper holder 18th , which is the first axis of rotation with its two fork arms 16 holds, with the plate compactor 6th firmly connected, and is the lower holder 19th , which with its two fork arms the second axis of rotation 17th stops with the chassis 7th firmly connected.

The spindle drives 15th are preferably evenly distributed on an imaginary circle in the center of which the universal joint is located - preferably with a total of three spindle drives 15th evenly distributed with an angular distance of 120 °. Every spindle drive 15th includes a screw 20th , A mother 21st and an engine 22nd . The respective spindle drive 15th can be designed as a recirculating ball screw. Between engine 22nd and screw 20th For example, a single-stage gear transmission can be arranged.

2 and 5 show that the spindle drives 15th are extended differently from each other, whereby the plate compactor 6th both around the first axis of rotation 16 as well as about the second axis of rotation 17th has been pivoted and inclined downwards towards one of the panel corners. With this adjustment of the vibrating plate 6th the motors are in the double or multi-axis inclined position 22nd the spindle drives 15th controlled coordinated by an electronic control.

2 shows that due to the inclined alignment of the plate compactor 6th swiveling movement taking place S. the vibrating plate 6th around the second axis of rotation 17th the front stops 9 on the vibrating plate 6th without countermeasures other than overlap or alignment with the vibrating plate 6th separate or external front stops 12 on the machine frame 13 would arrive, whereby between the front stops 9 and the front stops 12 an offset A. longitudinal x would arise. As a countermeasure, the offset is compensated A. , with the chassis 7th together with the Plate compactor 6th and their front stops 9 against the longitudinal direction x in the guides 10 from the position according to 2 in the position according to 3 is proceeded. This relative to the lift 8th traversing movement that takes place V is in 2 symbolized by an arrow. An opposite offset compensation takes place when the vibrating plate 6th is aligned horizontally again from its inclined position and is swiveled against the direction of rotation indicated by "S". This is where the chassis 7th together with the plate compactor 6th to compensate for the offset in the longitudinal direction x proceed.

As in 3 recognizable, the front stops are after the compensation 9 the vibrating plate 6th with the front stops 12 of the machine frame 13 not in a straight line, but at least flush. Here, the top edge of the stack of sheets B. facing side surface of the respective front stop 9 in the plane of the stack of sheets B. facing side surface of the cooperating front stop 12 held. Thus, said upper edge represents the so-called moment pole for the control of the chassis 7th This ensures that the leading edge of each on the stack of sheets B. falling sheet completely from the sheet pile B. facing side surface of the front stop 12 of the machine frame 13 on the stack of sheets B. facing side surface of the front stop 9 the vibrating plate 6th to be led.

6th shows the example of the side stops 23 that the jar stops 9 , 23 through one socket each 24 be guided as a linear guide. By that the socket 24 at the bottom sufficiently far from the vibrating plate 6th protrudes, a large bush length and thus guidance stability can be achieved. By that the socket 24 not from the top of the plate compactor 6th or their sheet receiving surface 36 protrudes, the stack of sheets can be unobstructed from the side of the vibrating plate 6th be pulled down.

The vibration and side stops 23 are each via a paddock 25th with a support shoe 26th articulated, which is on the chassis 7th supports and slides or rolls on it. Through the paddock 25th is a compensating movement between the vibration stop and its support shoe 26th when tilting the plate compactor 6th , the vibration stop from the vertical direction z is tilted, possible. The described storage (socket, coupling, support shoe) of the side stops 23 is also at the front stops 9 present, but in the 1 to 3 not shown for reasons of drawing simplicity.

Through synchronous retraction of the spindle drives 15th becomes the inclined plate compactor 6th relative to the chassis 7th and to the lifting platform 8th lowered, causing the side stops 23 and front stops 9 the height of the sheet stack, which increases during production B. accordingly from the vibrating plate 6th step out above. This means that there is no active tracking of the vibration stops 9 , 23 when lowering the plate compactor 6th required and are necessary for the height adjustment of the vibration stops 9 , 23 no separate actuators required, which is inexpensive. In addition, this is more reliable, because otherwise with your own actuators, which are on the vibrating plate 6th would be attached, there would be a risk of drive failure due to the transmitted vibrations. Here the upper edges of the vibration stops 9 , 23 be considered stationary. In addition, the spindle drives are retracted 15th the height of fall between chain conveyors 3 and stacks of sheets B. for those from the chain conveyor 3 one after the other on the pile of sheets B. dropped arc held constant. When the spindle drives are retracted at the same time 15th the lifting platform is idle during production 8th .

The electronic control can control the motors outside of the production run 22nd the spindle drives 15th in coordination with the motor of the chain drive 11 control in such a way that the vertical movements of the vibrating plate are superimposed 6th and the lift 8th results. In this way different movement patterns can be generated. For example, the vibration stops 9 , 23 into the plate compactor 6th retracted or sunk into it without the plate compactor 6th doing a vertical movement.

6th shows an operating situation with a low stack of sheets B. and 7th shows an operating situation with a high stack of sheets B. , said height of fall being the same in both operating situations.

8th shows an operating situation in which the plate compactor 6th through the spindle drives 15th is raised so far that the vibration stops 9 , 23 - shown here using the example of the side stops 23 - so far in the sockets 24 (or in the other type of linear guides used in place of the sockets) are withdrawn so that the vibration stops are sunk and no longer over the sheet pile B. load bearing surface 36 the vibrating plate 6th survive. Such a deep countersinking is at least with the side stops 23 necessary because the stack of sheets over this B. from the plate compactor 6th is pulled down. At the front stops 9 deep countersinking is not absolutely necessary. It can be seen that in this operating situation one to the lower holder 19th associated guide, which can be designed as a telescope, is extended far up.

9 shows that a jolt stop 9 , 23 with a clamp 27 for clamping the stack of sheets B. on the plate compactor 6th Is provided. The Clamp 27 is through a first actuator, for example in the form of a pneumatic working cylinder 28 , actuatable and designed as a lever which is rotatably mounted in the vibration stop. The raised pile of sheets B. is pressed against one lever arm and the working cylinder engages the other lever arm 28 at. Preferably there are several vibration stops 9 , 23 each with such a clamp 27 equipped, e.g. every side stop 23 .
At the jogger stop 9 , 23 is a head start 43 , z . B. in the form of a cross pin, arranged. When lifting the plate compactor 6th with the sheet pile B. the latter hits the clamp from below 27 when it is in the clamped position. As a result, the vibration stop will be activated as the lifting continues 9 , 23 over the clamp 27 taken up until the ledge 43 on a latch 45 bumps. The latch 45 can be pivoted from a locking position into a release position by a second actuator, as symbolized in the drawing with a phantom line. The bolt blocks in the locked position 45 the vibration stop 9 , 23 so that lifting this jogger stop 9 , 23 is hindered. The second actuator can be used as a pneumatic working cylinder 44 be trained. The lead 43 lifts the bolt from a sensor when it moves upwards 46 from. The sensor 46 as a result, signals an electronic control that the stack of sheets B. on the vibration stop 9 , 23 is posted from below.
If at least two vibrating stops that can be lifted upwards 9 , 23 with such sensor-monitored terminals 27 are equipped, an undefined high, uneven stack of sheets can be B. be clamped securely. The two clamps 27 the vibration stops 9 , 23 can cooperate in such a way that the terminal 27 at which the first stack contact occurs - the first terminal 27 - by pulling back the bolt 45 is unlocked. For this purpose said control controls the working cylinder 44 the clamp 27 accordingly. The first clamp clamps the stack of sheets by its own weight after unlocking B. and is moved further upwards. This continues until the second terminal also 27 comes into contact with the stack surface and is slightly lifted by what the sensor 46 the second clamp 27 is recognized and signaled to the control. Once this has occurred and the stack of sheets B. through both clamps 27 is fixed, the upward movement of the plate compactor is controlled by the controller 6th with the sheet pile B. stopped. In the method described, the times for unlocking the first terminal are therefore 27 and for stopping the upward movement of the second clamp 27 through the sensors 46 recognized.

10 shows that in a jarring stop 9 , 23 a sensor 29 for detecting the stack of sheets B. is integrated. The one at the rattle stop 9 , 23 attached sensor 29 measures the height of the stack of sheets 8th and is preferably a contactless, eg optical sensor 29 . Based on the signals from the sensor 29 the electronic control controls the motors 22nd the spindle drives 15th and in certain operating situations the engine, which is controlled by the chain drive 11 the lift 8th raises

11 shows a blowing device 30th that hit a jolt stop 9 , 23 is arranged and air in the pile of sheets to be jogged B. blows. At least between the upper sheets of the sheet stack B. blown air cushions ensure that the sheets slide smoothly on top of each other when jogged. The one in the rattle stop 9 , 23 integrated blowing device 30th includes a blown air chamber 40 in the jogger stop 9 , 23 . The blown air chamber 40 has a compressed air connection 31 and in theirs the pile of sheets 6th facing wall blowing air openings 32 , which are designed as nozzle holes and in a vertical direction z running row are arranged. Instead of the nozzle bores, slots or a single slot can also be present. Preferably there are several vibration stops 9 , 23 each with such a blower 30th equipped, e.g. every side stop 23 .

With all three in the 9 to 11 additional devices shown (clamp 27 , Sensor 29 , Blower 30th ) that work together on one and the same vibration stop 9 , 23 can be arranged, there is the advantage that when setting the vibration stop 9 , 23 the respective additional device is set to the format of the sheet to be processed. There is also the advantage that with the help of the sensor 29 the clamp 27 and / or the blowing device 30th - depending on what goes along with the sensor 29 at the vibration stop 9 , 23 is arranged - at a constant position relative to the top edge of the sheet stack B. can be held or can.

12 shows that on the in side stops 23 opposite side of the stack of sheets B. a pressure piece 33 for pressing at least the lower sheet of the sheet stack B. to the side stops 23 is arranged. The pressure piece 33 can be in the form of a small plate and in any case has a flat surface 34 as a printing area. The pressure piece 33 can be acted upon by the force of a spring and / or be adjustable by an actuator. Through the pressure piece 33 the accuracy of the stack geometry is improved, which is particularly advantageous when many sheets at once, for example from an auxiliary stack carrier, on the vibrating plate 6th be filed. The pressure piece 33 Can be adjusted according to the sheet format and for stack removal in the vibrating plate 6th retractable or removable from this. Several such pressure pieces can be used 33 be arranged side by side. In addition, one or more pressure pieces can be used of this type on the front stops 9 opposite side of the stack of sheets B. to press the sheets against the front stops 9 be arranged. The vibration stops 9 , 23 are in 12 - as in the 1 - 3 and 20th - 22nd without the sockets 24 shown in simplified form.

In the 13 to 19th are successive steps of a method for removing the vibrated and thereby through the vibrating stops (front stops 9 , Side stops 23 ) aligned stack of sheets B. by means of a gripper 35 from the plate compactor 6th shown. In addition, devices are shown therein with which the method can be carried out automatically.

13 shows the initial situation after shaking. The pile of sheets B. is mostly on the recording surface 36 the vibrating plate 6th and with his over the recording surface 36 laterally protruding edge on a support plate 37 on that are in one with the receiving area 36 flush vertical position.

14th shows that the grapple 35 from one of the sheet pile B. more distant horizontal position in a stack of sheets B. closer horizontal position above one of the sheet pile B. free area of the support plate 37 has been adjusted.

15th shows that the support plate 37 than completely to a level below the receiving surface 36 Lowerable edge element formed and with at least one lifting element 38 connected is. The lifting element 38 can be an active force element, eg a working cylinder as an actuator to raise and lower the support plate 37 . In the example shown, the lifting element is 38 a passive force element in the form of a return spring, e.g. helical spring or gas pressure spring. The support plate is then lowered 37 by a vertical movement of the gripper 35 down, as a result of which the gripper 35 the support plate 37 against the restoring force of the lifting element 38 pushes down so far that a lower clamping jaw 39 of the gripper 35 a level below the receiving surface 36 and thus the stack of sheets B. reached.

16 shows that the grapple 35 in the next step horizontally on the stack of sheets B. to is moved, causing it to enter the gripper 35 is inserted and the jaw 39 the stack of sheets B. reaches under.

17th shows that the grapple 35 closed and thereby the sheet pile B. between the lower jaw 39 and an upper jaw of the gripper 35 is pinched. When closing the gripper 35 only one jaw, e.g. the upper jaw, or, in the case of a pincer gripper, both jaws can be moved.

18th shows that the grapple 35 with the stack edge clamped therein is moved upwards and the lifting element 38 the support plate 37 back in their with the receiving surface 36 has moved a common plane position upwards.

19th shows the last step, being the gripper 35 horizontally from the plate compactor 6th moved away and thereby the jammed sheet stack B. from the plate compactor 6th is pulled down, the stack of sheets B. on the recording surface 36 and the adjoining support plate 37 slides.

In the 20th to 22nd a modification is shown which differs from that in the 1 to 19th The illustrated and described embodiment differs only in two respects: On the one hand, there is the chassis 7th through a support frame 41 replaced the one with the lift 8th is firmly connected and cannot be moved. On the other hand is the front stop 12 or the plurality of front stops 12 on the machine frame 13 not fixed in place, but attached to it via a guide 42 adjustable arranged. Compensation for the offset A. does not take place in the modification as in the embodiment of FIG 1 to 19th through a horizontal frame adjustment, but through a stop adjustment. In this, the or everyone of the plate compactor 6th separate front stop 12 with a linear movement L. longitudinal x adjusted. The linear motion L. is through the leadership 42 determined if this is a linear guide. Otherwise, the linear movement L. be a component of a pivoting movement if the or each front stop 12 via a swivel joint instead of via the guide 42 with the machine frame 13 connected is.

In a variant not shown in the drawing, neither is the adjustability of the separate front stop 12 nor the chassis 7th required and is used to compensate for the offset A. the front stop 9 at the vibrating table 6th along the receiving surface 36 shifted by motor. The stack of sheets B. on the recording surface 36 moved along, which was achieved by a sliding air cushion between the receiving surface 36 and the stack of sheets B. generating nozzles in the receiving area 36 can be promoted.

List of reference symbols

1

Printing press

2

boom

3

Chain conveyor

4th

Gripper bridge

5

Stacking device

6th

Plate compactor

7th

chassis

8th

Lifting platform

9

Front stop

10

guide

11

Chain drive

12

Front stop

13

Machine frame

14th

universal joint

15th

Spindle drive

16

first axis of rotation

17th

second axis of rotation

18th

holder

19th

holder

20th

screw

21st

mother

22nd

engine

23

Side stop

24

Rifle

25th

Paddock

26th

Support shoe

27

Clamp

28

Working cylinder

29

sensor

30th

Blower

31

Compressed air connection

32

Blown air opening

33

Pressure piece

34

Flat surface

35

Gripper

36

Recording area

37

Support rail

38

Lifting element

39

Jaw

40

Blown air chamber

41

Support frame

42

guide

43

head Start

44

Working cylinder

45

bars

46

sensor

A.

Offset

B.

Stack of sheets

L.

Linear motion

S.

Swivel movement

T

Transport direction

V

Traversing movement

x

Longitudinal direction

y

Transverse direction

z

Vertical direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102017215360 A1 [0002]
• DD 289256 A5 [0003]
• DE 19514850 A1 [0003]
• DE 102017209555 A1 [0003]

Claims (10)

Printing machine comprising a stacking device (5) with a vibrating plate (6) which can be adjusted from a horizontal position to an inclined position, with the vibrating plate (6) at least one first vibrating stop (23) on which the stack of sheets (B) rests when vibrating , is connected, characterized in that there is a lifting platform (8) which, together with the vibrating plate (6), can be adjusted in the vertical direction (z) by a chain drive (11), that the first vibrating stop (23) with the vibrating plate (6 ) is connected in a thrust-movable or thrust-articulated manner, and that the first vibration stop (23) is supported on a frame (7, 41) carried by the lifting platform (8). Printing press after Claim 1 , characterized in that the first vibrating stop (23) is adapted to an increasing stack height of a stack of sheets (B) on the vibrating plate (6) by lowering the vibrating plate (6) and by supporting the first vibrating stop (6) this out of the The vibrating plate (6) is pushed out further upwards. Printing press after Claim 1 or 2 , characterized in that the first vibrating stop (23) is connected to the vibrating plate (6) in a thrust-movable or thrust-articulated manner via a bushing (24) or other linear guide. Printing press according to one of the Claims 1 to 3 , characterized in that the frame (7) is either a support frame (41) which is firmly connected to the lifting platform (6), or a chassis (7) which, together with the vibrating plate (6), has a guide (10) the lift (6) is movable. Printing press according to one of the Claims 1 to 4th , characterized in that the vibrating plate (6) is connected to the lifting platform (8) via spindle drives (15) or other lifting drives for lifting the vibrating plate (6) and via a universal joint (14). Printing press after Claim 5 , characterized in that the universal joint (17) has a first axis of rotation (16) and a second axis of rotation (17), that the second axis of rotation (17) runs orthogonally relative to a longitudinal direction (x), and that the first axis of rotation (16) is pivotable together with the vibrating plate (6) about the second axis of rotation (17). Printing press according to one of the Claims 1 to 6th , characterized in that at least one of additional devices (27, 29, 30) in the form of a clamp (27), a sensor (29) and a blower device (30) is arranged on the first vibration stop (23). Printing press after Claim 7 , characterized in that the additional device (27, 29, 30) can be adjusted together with the first vibrating stop (23) and can thus be adapted to different-sized sheet stacks (B). Printing press according to one of the Claims 1 to 8th , characterized in that with the vibrating plate (6) at least one second vibrating stop (9), on which the stack of sheets (B) rests when vibrating, is connected in a push-movable or articulated manner, and that the second vibrating stop (9) on the frame (7, 41) is supported. Printing press after Claim 9 , characterized in that the first vibrating stop (23) is a side stop (23) and / or the second vibrating stop (9) is a front stop (9).

Images