EP2059468B1 - Register insertion apparatus - Google Patents

Abstract

The register insertion apparatus for sheet-fed embossing machines with position sensors (S1, S2, S3) for detecting printing marks (P1, P2, P3) of a sheet (5), comprises a register plate (15) capable of being pivoted down as feeder table with ventilation openings (20) and vacuum feed lines (21) to a suction apparatus (22) and front stops (12), which are capable of being lowered and actuators (L1, L2, L3) for positioning the register plate in X-direction and in Y-direction. With a register controller (11) the register plate (15) is pivoted down, a gripper bar (8) is brought up to it, the register plate pivoted up again, then a sheet (5) is fed-in and stopped at the front stops (12). Thereupon the register plate is evacuated for sucking on and fixing the sheet on the register plate. Then the positions of the printing marks (P1, P2, P3) are detected by the position sensors, from this the register correction values (X1, X2, Y3) are calculated and the register plate by means of the actuators (L1, L2) in X-direction and by means of the actuator (L3) in Y-direction is moved into the desired position (P1S, P2S, P3S). Then the sheet is gripped by the gripper bar, the register plate (15) is ventilated and the sheet is transported on by the gripper bar. This results in an automatic register correction at high machine speeds and with the highest print quality.

Description

The invention relates to a register feed device for sheet embossing machines according to the preamble of claim 1. Such an automatic register retraction device is known, for example from the EP 0 708 046 or the US 5,718,057 ,

Here, a non-fixed sheet by means of position sensors and print marks, controlled by two front stops and a side stop, which are ever moved by actuators, moved to a desired position. This register positioning of a non-fixed sheet by front and side stops, however, still has significant limitations and disadvantages. Especially at higher speeds, the register displacements on a non-fixed sheet can not be performed quickly and accurately enough because the sheet is increasingly warped or compressed.

So far, the register positioning of the bow was therefore normally set and adjusted by hand. Such a flat embossing machine is eg in the EP 0 858 888 described.

The object of the invention is therefore to provide an automatic register retracting device for higher performance, which overcomes the disadvantages and with which for each sheet individually optimally and automatically all registration errors are corrected and which allows printing and embossing images in consistently high quality.

This object is achieved by a register feed device according to the invention as claimed in claim 1.

The dependent claims relate to advantageous developments of the invention. These concern further improvements in register functions and properties, and allow for a wider range of application and higher machine performance. In the following the invention with reference to examples and figures will be further explained.

Fig. 1

eine erfindungsgemässe Registereinzugsvorrichtung mit einer abschwenkbaren, bewegbaren Registerplatte mit Entlüftungsöffnungen und Vakuumzuleitungen,

Fig. 2

eine Registerplatte mit abschwenkbaren Frontanschlägen,

Fig. 3

eine Registerplatte mit Entlüflungsöffnungen in verschiedenen Saugbereichen und mit einer vorderen Saugleiste im Grundriss,

Fig. 4

eine Registerplatte mit Entlüftungsöffnungen im Querschnitt,

Fig. 5a,b,c

Beispiele von Entlüftungsöffnungen,

Fig. 6

eine Anordnung von Stellgliedern mit Linearmotoren, einer Trägerplatte mit Kreuzschlitten und Auflage-Lagern für eine Registerplatte,

Fig. 7a,b

Registerdiagramme mit einem zeitlichen Ablauf der Registerfunktionen über einen Maschinenzyklus,

Fig. 8

eine Registerplatte mit einem Einlaufblech,

Fig. 9

eine Registerplatte mit Saugplättchen,

Fig. 10

ein Saugplättchen,

Fig. 11

schematisch eine Registersteuerung,

Fig. 12

eine Prägedruckmaschine mit einer Registereinzugsvorrichtung.

Show it:

Fig. 1

a register feed device according to the invention with a swing-away, movable register plate with ventilation openings and vacuum supply lines,

Fig. 2

a register plate with swiveling front stops,

Fig. 3

a register plate with Entlüflungsöffnungen in different suction areas and with a front squeegee in plan view,

Fig. 4

a register plate with vents in cross-section,

Fig. 5a, b, c

Examples of vents,

Fig. 6

an arrangement of actuators with linear motors, a carrier plate with cross slide and support bearings for a register plate,

Fig. 7a, b

Register diagrams with a chronological sequence of the register functions over a machine cycle,

Fig. 8

a register plate with an inlet plate,

Fig. 9

a register plate with suction pads,

Fig. 10

a suction plate,

Fig. 11

schematically a register control,

Fig. 12

an embossing machine with a register feed device.

Fig. 1 shows a register feeding device 10 for sheet-fed printing presses with position sensors S1, S2, S3 for detecting printing marks P1, P2, P3 of a sheet 5, which define the front edge and the side edge of a printed image, with a register plate 1 as a feed table, which can be swung off, with vents 20 and vacuum feed lines 21 to a suction device 22 and front stops 12, which are lowered, and with two actuators L1, L2 for positioning the register plate in the X direction and an actuator L3 for positioning in the Y direction and with a register control 11, to Control of register functions and components. The register plate 15 forms a feed table or a support plate on which the sheet 5 rests for transfer to the gripper bar. 8

In this case, the register plate 15 is pivoted 15 'for the passage of a gripper bar 8, softer with a drive chain 32 of the embossing machine 1 is connected.

Then, the gripper bar is stopped and the register plate swung open again and fed a sheet 5 of a feeder 3 on the register plate until it is stopped at the front stops 12. Then, the register plate is evacuated to suck and fix the sheet 5 on the register plate 15. Subsequently, the front stops 12 are lowered (12 ') and the register plate is advanced by the actuators L1, L2 in the X direction while the sheet 5 on the gripper bar 8 deferred while also the position of the print marks P1, P2 detected on the sheet with the sensors S1, S2 and from a residual displacement X1, X2 calculated and the register plate with the sheet in the X direction in the desired position P1S, P2S shifted and After the position of the print marks P1, P2 in the X direction is detected by the sensors S1, S2, the register plate is moved by the actuator L3 in the Y direction to the target position P3S, by analogously, the page edge print mark P3 by detects the sensor S3 and a lateral residual shift Y3 is calculated. After register registration is completed, the sheet 5 is detected by the stationary gripper bar 8 by the gripper clips getting closed. Then the register plate 15 is vented and the sheet thereby released from the register plate, so that it can be transported by the gripper bar 8 on the lowered front stops 12 away in the next station (here a flat press 2). How to the Fig. 7a , b, the register movements of the actuators in the X direction and in the Y direction can take place successively ( Fig. 7a ) or they can also be partly simultaneous ( Fig. 7b ). For precise register alignment, the sensor S3 may also be placed near the front edge of the register plate (S3 ').

Preferably, the registration plate 15 may be pivotable about an axis of rotation 16 and moved by a machine drive 30, here e.g. by means of a cam 31. This results in a simple high-dynamic and precise drive of the register plate 15, synchronously with the machine.

Fig. 1 further shows front position sensors S1, S2 which are adjustably mounted on a fixed frame over the register plate 15. These can preferably be arranged at a small distance d of, for example, 1-3 mm in front of the front print marks P1, P2 with the sheet 5 standing (when this has arrived at the front stops 12). Then, the position of the print marks P1, P2 is rapidly detected as the register plate advances, leaving more time for the calculation of the residual displacements X1, X2 by the controller 11, so that the register plate 15 is directly in the target positions P1S, P2S with total displacements X4, X5 can be moved and the movement of the actuator L3 in the Y direction can begin earlier. Analogously, Y is also traveled in the transverse direction Y directly into the desired position P3S with a total displacement Y6.

In the X direction, the basic shift X0 (without register correction) is 9 mm, for example, and it can be in a range of, for example, 5-12 mm. In the Y direction, the basic shift Y0 can be in a range of, for example, 4-8 mm and, for example 5 mm. The total shifts = basic shift + calculated residual shift are then: $$\mathrm{X}\mathrm{4}\mathrm{=}\mathrm{X}\mathrm{0}\mathrm{+}\mathrm{X}\mathrm{1}\mathrm{.}\mathrm{X}\mathrm{5}\mathrm{=}\mathrm{X}\mathrm{0}\mathrm{+}\mathrm{X}\mathrm{2}\mathrm{.}\mathrm{Y}\mathrm{6}\mathrm{=}\mathrm{Y}\mathrm{0}\mathrm{+}\mathrm{Y}\mathrm{3}$$

It is also possible to manually input additional image pressure correction values X1.1, X2.1, Y3.1 into the register controller 11. Then the total shifts result to: $$\mathrm{X}\mathrm{4}\mathrm{=}\mathrm{X}\mathrm{0}\mathrm{+}\mathrm{X}\mathrm{1}\mathrm{+}\mathrm{X}\mathrm{1.1}\mathrm{.}\mathrm{X}\mathrm{5}\mathrm{=}\mathrm{X}\mathrm{0}\mathrm{+}\mathrm{X}\mathrm{2}\mathrm{+}\mathrm{X}\mathrm{2.1}\mathrm{.}\mathrm{Y}\mathrm{6}\mathrm{=}\mathrm{Y}\mathrm{0}\mathrm{+}\mathrm{Y}\mathrm{3}\mathrm{+}\mathrm{Y}\mathrm{3.1}$$

Such additional correction values may e.g. serve to determine differences between an existing image and a subsequent imprinting applied to the existing image by eye and to input corresponding correction values until agreement is reached.

The register positioning can also be applied to sheets which have no print marks P1, P2, P3. Then, the front and a side sheet edge serve as print marks, which are detected by the correspondingly adjusted position sensors S1, S2, S3.

Fig. 2 shows, for example, a register plate 15 with a simple embodiment of the lowerable front stops 12 which are pivotally mounted on a holder 13 about an axis. The holder is rapidly moved on both sides by a respective pneumatic cylinder 14, ie, pivoted up and down (12 ').

In order to achieve high machine speeds and reliable precise operation of the register device, the sheet 5 must be fixed quickly and without distortion on the register plate 15, which as a whole can perform the register positioning in X and Y direction quickly and accurately, so that the sheet in the desired position can be transferred exactly defined to the gripper bar 8. For this purpose, fixing and releasing the sheet by means of venting and ventilation must be carried out quickly, thus allowing as much time as possible for register positioning is available. With the inventive register retraction device therefore a rapid suction and fixation of the sheet and secure adhesion to the register plate 15 (without slipping) achieved: on the one hand by appropriate design of the vent with little void volume and rapid response and by arranging and dimensioning vents 20 and leads 21st and on the other hand also by an optimal static friction on the surface 19 of the register plate. The function of a feed plate 35 with a fixed axis of rotation 36 and sliding blocks 37 for guiding an incoming sheet 5 close to the register plate 15 is the example of Fig. 8 further explained.

The Fig. 3 to 5 show examples of register plates 15 with vents 20, vacuum feed lines 21, valves 23 and suction device or vacuum devices 22 for quickly and securely fixing the sheet 5 on the register plate. For this purpose, the surface 19 is locally formed in the vicinity of vents 20 with a good stiction.

Fig. 3 shows in plan a register plate 15 with different suction areas Bi and with a front squeegee 17, on which the front edge of a sheet 5 rests. Here, the sheet on the squeegee in the foremost region 17 is particularly well fixed by an increased suction power to the squeegee 17 compared to the suction or to the contact pressure and the static friction force on a rear suction plate 18th

• die Anzahl und Anordnung der Belüflungsöffnungen 20 (viele an der Saugleiste 17, relativ wenige an der Saugplatte 18) und durch
• Unterteilung in einzelne Kammern, welche je mit einer Vakuumzuleitung 21 und einem Ventil 23 verbunden sind: hier die Bereiche B1 bis B5 an der Saugleiste 17 und B6 bis B8 an der Saugplatte 18.

For this purpose, the register plate has suction regions B1, B2,... With different, adjustable suction powers and / or with separate vacuum feed lines 21. The suction areas can differ by:

• the number and arrangement of the Belüflungsöffnungen 20 (many on the squeegee 17, relatively few on the suction plate 18) and through
• Division into individual chambers, which are each connected to a vacuum supply line 21 and a valve 23: here the areas B1 to B5 on the suction strip 17 and B6 to B8 on the suction plate 18th

Thereby, e.g. the areas B1 to B5 and B7 are vented and vented and the areas B6 and B8 remain open (not vented), so that the sheet 5 is fixed particularly well, quickly and safely, especially in the foremost area 17 at the front edge 29.

Fig. 4 shows the register plate 15 of Fig. 3 on average AA. In the foremost area 17 here the chamber of the area B1 with separate supply line 21 and valve 23 and in the rear suction plate 18, the chamber of the area B6 with separate supply line 21 and valve 23 is shown. In the vacuum device 22 with a vacuum reservoir, for example, a negative pressure of -0.6 bar is generated.

The surface 19 of the index plate has partially around the vent holes 20 around an increased static friction, for example, it may be roughened or made of anodized aluminum. Especially in the forefront 17, e.g. on a front squeegee, an increased static friction is sought. To this end, the squeegee 17 may also be covered with a rubber layer 24 (e.g., 0.5 mm rubber coating).

The Fig. 5a , b, c show examples of vents 20 which are flared against the surface 19 of the register plate. The area of the ventilation openings is larger at the top of the surface (eg with diameter = 3 mm) than at the bottom of the side of the vacuum supply lines 21 (eg diameter = 1 mm). Fig. 5b shows a section through a suction plate 41 with an oblique slot 42, which in Fig. 8 are shown. Fig. 5c shows a vent 20, which is slit-shaped above (eg 3 x 12 mm) and below three smaller holes

(1 mm). Thus, the contact surface and the contact pressure on the register plate 15 is increased and the bow fixed better.

In order to be able to align the registration plate 15 quickly and accurately, highly dynamic, precise actuators L1, L2, L3 are used, e.g. Servo motors with spindles. The moving masses of the register plate 15 are kept as deep as possible with their drive device, e.g. also by aluminum construction. Advantageously, can be used as actuators linear motors.

Fig. 6 shows, as well as in Fig. 1 a light, highly dynamic and precise drive device of the register plate 15, which has linear motors 25, a support plate 26 with linear guides 27 and pivot bearings, which form a cross slide, and two outer support bearings 28 for a rotation axis 16 of the register plate 15. Zwei Linear motors 25.1, 25.2 run in the X direction and a linear motor 25.3 in the Y direction. The support bearings 28 'may also be offset inwardly, thereby resulting in a more compact, lighter construction.

The Fig. 7a, 7b show a register diagram with a timing of the register functions over a machine cycle of 360 ° in function of the machine rotation angle W = 0 ° - 360 ° with the functions or movements 51 to 58 of the components: 51 Movement of drive chain 32 and gripper bar 8: a = prefer b = stand still 52 Movement of the bow 5: a = promote, prefer to the next station b = fixed to the register plate 15th 53 on the gripper bar 8: a = open clamp al = opening point b = close the clamp b2 = closing point 54 Register plate 15: a = lower b = lift 55 Register plate 15: a = vent, evacuate b = aerate 56 Front stops 12: a = set up, set up b = lower, lowered 57 Longitudinal register in the X direction with actuators L1, L2: a = move into the desired positions P1S, P2S b = reset to the starting position 58 Cross register in Y direction with actuator L3: a = move to the desired position P3S b = reset to the starting position 57a, 58a = move the register plate 15 with the sheet 5 fixed thereon 57a2, 58a2 the displacements in the X direction and in the Y direction occur partially simultaneously

• Der auf die Registerplatte 15 einlaufende Bogen 5 wird mechanisch durch die Frontanschläge 12, die auf der Registerplatte angebracht sind, gestoppt. Der Bogen erreicht den Frontanschlag bei z.B. W = 185° der Maschinenstellung. Die Registerplatte steht zu diesem Zeitpunkt ca. 8 - 10 mm vor der theoretischen Endlage (Bogenübergabe an den Greiferbalken). Unmittelbar nach der Bogenankunftszeit wird die Registerplatte entlüftet und der Bogen wird mit Unterdruck an die Registerplatte angesaugt. Dadurch entsteht eine kraftschlüssige Verbindung zwischen Bogen und Registerplatte. Anschliessend zum Zeitpunkt W = 225° beginnen die Stellglieder L1, L2 ihre Bewegung in Bogenlaufrichtung X. Auf dem Bogen sind zwei Druckmarken P1, P2 und eine Seitenmarke P3 angebracht. Der Frontmarkenleser, bzw. die Sensoren S1, S2, die in einem Abstand von ca. 10 mm über dem Bogen liegen, erfassen die vorbeigeführten Druckmarken P1, P2. In der Registersteuerung 11 werden die Längsmarkensignale ausgewertet und mit den beiden Stellgliedern L1, L2 wird der Bogen in Längsrichtung X ausgerichtet. Die Stellglieder haben hier für die gesamte Verschiebung in X- und anschliessend auch in Y-Richtungje 60° der Maschinenbewegung zur Verfügung. Bei einer Maschinengeschwindigkeit von z.B. 7500 Bogen/Stunde ergeben sich somit je 80 ms für die X- und die Y-Positionierung. Sobald der Bogen am Frontanschlag vom Vakuum der Registerplatte 15 erfasst und fixiert ist, kann der Frontanschlag 12 abgeschwenkt werden. Der Startpunkt dafür liegt bei W = 240°. Der Frontanschlag muss zwingend vor der Ankunft des Bogens am Frontanschlag bei W = 185° wieder in aufgestellter Stellung stehen, z.B. bei W = 170° - 180°. Bei der Maschinenposition W = 285° beginnt das Stellglied L3 seine Bewegung. Mittels einem Seitenmarkenleser bzw. Sensor S3 und durch die Steuerung wird der Bogen seitlich in Y-Richtung ausgerichtet. Zum Zeitpunkt W = 345° schliessen die Klammern am Greiferbalken und fixieren so den Bogen. Anschliessend wird die Registerplatte 15 belüftet und der Bogen muss zum Zeitpunkt W = 360° frei sein zum Weitertransport mittels Greiferbalken 8. Im Beispiel von Fig. 7a erfolgen die Bewegungen in X-Richtung (57a) von 225° - 285° und in Y-Richtung (58a) von 285° - 345° nacheinander.

The timing of register alignment after Fig. 7a may look like this:

• The sheet 5 entering the registration plate 15 is mechanically stopped by the front stops 12 mounted on the registration plate. The bow reaches the front stop at eg W = 185 ° of the machine position. The index plate is at this time about 8 - 10 mm before the theoretical end position (sheet transfer to the gripper bar). Immediately after the Bogenankunftszeit the register plate is vented and the sheet is sucked with negative pressure to the register plate. This creates a frictional connection between the sheet and register plate. Subsequently, at the time W = 225 °, the actuators L1, L2 begin their movement in the sheet travel direction X. On the Sheets are two print marks P1, P2 and a side mark P3 attached. The front marker reader, or the sensors S1, S2, which are located at a distance of about 10 mm above the sheet, detect the passing past print marks P1, P2. In the register control 11, the longitudinal mark signals are evaluated and with the two actuators L1, L2, the sheet is aligned in the longitudinal direction X. The actuators have here for the entire displacement in X and then also in the Y direction je 60 ° of machine movement available. At a machine speed of, for example, 7500 arc / hour, this results in 80 ms each for X and Y positioning. Once the sheet is detected and fixed at the front stop by the vacuum of the register plate 15, the front stop 12 can be swung. The starting point for this is W = 240 °. The front stop must be in an upright position at the front stop at W = 185 ° before the bow arrives, eg at W = 170 ° - 180 °. At the machine position W = 285 °, the actuator L3 starts its movement. By means of a page mark reader or sensor S3 and by the controller, the sheet is aligned laterally in the Y direction. At time W = 345 °, the clamps close the gripper bar and thus fix the bow. Subsequently, the register plate 15 is vented and the sheet must be free at time W = 360 ° for further transport by means of gripper bar 8. In the example of Fig. 7a the movements take place in the X-direction (57a) from 225 ° - 285 ° and in the Y-direction (58a) from 285 ° - 345 ° successively.

Fig. 7b FIG. 12 shows an example in which the displacements X4, X5 by the actuators L1, L2 in the X direction and the displacement Y6 by the actuator L3 in the Y direction partially simultaneously occur overlapping each other. Here, the X-displacement (57a2) takes place, for example, from W = 220 ° - 320 ° (over 100 °) and the Y-displacement (58a2), for example, from 270 ° - 350 ° (above 80 °), the displacements of W = 270 ° - 320 ° simultaneously.

As a result, more time is available for each displacement direction X, Y, or higher machine speeds can be achieved. The Y shift should not begin until the position of the print marks P1, P2 in the X direction is detected. For this to happen quickly, the sensors S1, S2 are arranged as close as possible to the print marks P1, P2, for example at a distance of 1-3 mm, preferably 1-2 mm. Preferably, the Y-print mark P3 should not be read by the sensor S3 until the X-shifts are practically completed.

The displacements in the X and Y directions could also occur simultaneously, e.g. in that the sensors S1, S2, S3 detect the image marks P1, P2, P3 after the sheet has stopped on the register plate at the same time by detecting the position of an image mark with respect to a fixed reference point on the register plate 15 as image recording the residual displacements X1, X2, Y3 are calculated and then the actuators L1, L2, L3 simultaneously move the sheet in the X and Y directions to the desired positions P1S, P2S, P3S.

To further increase the machine speed, the movement 51a of the drive chain 32 may also be more than 180 °, e.g. 190 ° - 200 °, so that the standstill 51b would be less: 170 ° - 160 ° and the other functions 52-58 would be adjusted accordingly.

The 8 and 9 show a further advantageous embodiment of a register plate with screwed suction plate after Fig. 10 ,

The side view of the register plate 15 after Fig. 8 shows a swing-in inlet plate 35 as a baffle for an incoming sheet 5, which is brought close and flat by the inlet plate to the register plate, so that the sheet does not buckle and that it can be sucked in quickly. For this purpose, with sliding blocks 37, which rest on both sides on the register plate and are pressed by springs 38 against the register plate 15, a small distance a between register plate 15 and inlet plate 35 can be adjusted. This distance a of, for example, 1 to 2 mm is adjusted so that the sheet is as possible without frictional resistance can shrink and yet rests completely flat on the register plate. The inlet plate 35 has at the bow entrance to a bulge 34 and a fixed axis of rotation 36, which is fixed to the chassis. As a result, the inlet plate can be swung together with the index plate (15 ', 35') and the incoming sheet can initially be brought close to a still pivoted-index plate zoom.

Fig. 9 shows the register plate of Fig. 8 seen from above with suction pads 41 in the foremost region 17 along the front edge 29 of the register plate. For optimum adhesion and register alignment of the sheet 5 17 vents 20 are preferably at least in this foremost area. Preferably, this foremost region 17 also has a higher suction power (in this case by a larger number of ventilation openings 20) than the region (18 in FIG Fig. 3 ) of the register plate, which has only a few vents 20 in a central suction region B7 here.

Fig. 10 shows one of the suction pads 41 of Fig. 9 , which can be produced in a rational way, on the front edge 29 simply screwed onto the register plate and are also interchangeable. The suction pads 41 have oblique slots 42 with a small angle to the transverse axis Y of, for example, 30 °, so that incoming sheets do not abut it. For optimal fixing of the sheets on the register plate, these front suction pads 41 on the surface 19 (FIG. Fig. 5b ) a rubber coating on. In the rear suction B7 no rubber coating is provided here.

Briefly summarized, the sheets are 5 easily, quickly and flat shrink to the front stops and then, especially in the front region 17 by evacuating quickly and safely fixed flat on the index plate, so that the Register alignment can be performed quickly and accurately - without slipping or bulging the sheet. 5

Fig. 11 schematically shows a register controller 11 which is connected to the position sensors S1, S2, S3, the actuators L1, L2, L3, the actuating means 30, 31 of the register plate 15 and the suction device 22 with the valves 23 and with a drive 14 of the front stops 12th and with a machine control 7 of an associated embossing machine. The register control also includes a control program with a computer. An operating and display unit 9 allows z: B. also the entry of additional correction values X1.1, X2.1, Y3.1. With the register control, the operation of the various functions 51-58 is performed as well Fig. 7 is described.

With the inventive register retraction device 10 and its register control 11, an incoming sheet 5 can also be braked or slowed down by a conveyor of an investor 3 just before his arrival at the front stops 12, to reduce the delay of the arc when abutment.

Fig. 12 shows an embossing machine 1 with a novel register feeding device 10 with an evacuatable register plate 15, a register controller 11 and an operating and display device 9 and with a flat press 2 and a boom 4. Sheet 5 are fed from a feeder 3 unterschuppt on the register plate 15. The width of the register plate 15 in the X direction is smaller than the scale distance.

1

Prägedruckmaschine

2

Flachpresse

3

Anleger

4

Ausleger

5

Bogen

7

Maschinensteuerung

8

Greiferbalken

9

Bedienungs- und Anzeigetableau

10

Registereinzugsvorrichtung

11

Registersteuerung

12

Frontanschläge

13

Halterung von 12

14

Pneumatikzylinder

15

Registerplatte, Anlegetisch, Auflageplatte

16

Drehachse von 15

17

vorderster Bereich an 29, Saugleiste

18

hintere Saugplatte

19

Oberfläche von 15

20

Entlüftungsöffnungen

21

Vakuumzuleitungen

22

Saugvorrichtung, Vakuumvorrichtung

23

Ventile

24

Gummibeschichtung

25

Linearmotoren

26

Trägerplatte

27

Linearführungen

28

Auflagelager von 16

29

Vorderkante von 15

30

Maschinenantrieb

31

Kurvenscheibe

32

Antriebskette

34

Aufwölbung

35

Einlaufblech, Leitblech

36

fixe Drehachse von 35

37

Gleitstein

38

Feder

41

Saugplättchen

42

schräge Schlitze

51-58

Funktionen von 10

P1, P2, P3

Druckmarken

P1S, P2S, P3S

Soll-Positionen

S1, S2, S3

Positionssensoren

L1, L2, L3

Stellglieder

X

Laufrichtung

Y

Querrichtung

X0, Y0

Grundverschiebung von 15

X1, X2, Y3

berechnete Restverschiebungen, Registerkorrekturwerte

X1.1, X2.1, Y3.1

zusätzliche Korrekturwerte

X4, X5, Y6

Gesamtverschiebung von 15

W

Maschinendrehwinkel

d

Abstand Position von S1, S2 zu P1, P2

a

Abstand von 35 zu 15

B1, B2, B3

Saugbereiche

The following terms are used in this description:

1

Embossing machine

2

flat press

3

investor

4

boom

5

bow

7

machine control

8th

gripper bar

9

Operating and display panel

10

Register catchment device

11

register control

12

front stops

13

Bracket of 12

14

pneumatic cylinder

15

Register plate, feed table, platen

16

Rotation axis of 15

17

foremost area at 29, squeegee

18

rear suction plate

19

Surface of 15

20

vents

21

vacuum supply lines

22

Suction device, vacuum device

23

valves

24

rubber coating

25

linear motors

26

support plate

27

linear guides

28

Bearing of 16

29

Leading edge of 15

30

machine drive

31

cam

32

drive chain

34

upheaval

35

Inlet plate, baffle

36

fixed axis of rotation of 35

37

slide

38

feather

41

suction plates

42

slanted slits

51-58

Functions of 10

P1, P2, P3

print marks

P1S, P2S, P3S

Target positions

S1, S2, S3

position sensors

L1, L2, L3

actuators

X

direction

Y

transversely

X0, Y0

Basic shift of 15

X1, X2, Y3

calculated residual shifts, register correction values

X1.1, X2.1, Y3.1

additional correction values

X4, X5, Y6

Total shift of 15

W

Engine rotation angle

d

Distance Position from S1, S2 to P1, P2

a

Distance from 35 to 15

B1, B2, B3

suction regions

Claims (15)

1. Register insertion apparatus for sheet embossing machines with front stops and position sensors (S1, S2, S3) for detecting printing marks (P1, P2, P3) of a sheet (5), which define the front edge and the lateral edge of a print image, and with a controller, which is connected to the position sensors, characterised by
   a register plate (15) as feeder table, which is capable of being pivoted down, with ventilation openings (20) and vacuum feed lines (21) to a suction apparatus (22)
   and front stops (12), which are capable of being lowered,
   and by two actuators (L1, L2) for positioning the register plate in X-direction and one actuator (L3) for positioning in Y-direction and by a register controller (11), with which the register plate (15) is pivoted down for the passage of a gripper bar (8),
   thereupon the gripper bar is stopped and the register plate is pivoted back up again,
   then the sheet (5) is fed-in and stopped at the front stops (12),
   then the register plate is evacuated for sucking on and fixing the sheet on the register plate (15),
   then the front stops are lowered and the register plate is advanced in X-direction by the actuators (L1, L2) and the sheet is slid on to the gripper bar (8) and in doing so the position of the printing marks (P1, P2) is detected with the position sensors (S1, S2) and from this a residual displacement (X1, X2) is calculated and the register plate with the sheet is moved in X-direction to the desired position (P1S, P2S) and, after the position of the printing marks (P1, P2) in X-direction is detected, the register plate is moved in Y-direction by the actuator (L3) to the desired position (P3S),
   then the sheet is gripped by the standing gripper bar (8), then the register plate (15) is ventilated and the sheet is transported on by the gripper bar.
2. Register insertion apparatus according to claim 1, characterised in that the displacement in X-direction and the displacement in Y-direction partially take place simultaneously (57a2, 58a2).
3. Register insertion apparatus according to claim 1, characterised in that the register plate (15) is capable of being pivoted around a pivot axis (16) and is moved by a machine drive (30).
4. Register insertion apparatus according to claim 1, characterised in that the front stops (12) are fixed on a holder (13), which is capable of being pivoted up and - down by means of a pneumatic cylinder (14).
5. Register insertion apparatus according to claim 1, characterised in that the actuators comprise three linear electric motors (25.1, 25.2, 25.3) and a supporting plate (26) with linear guides (27) and with two bearings (28) for a pivot axis (16) of the register plate.
6. Register insertion apparatus according to claim 1, characterised in that the register plate (15) comprises a run-in plate (35), which is capable of being pivoted down.
7. Register insertion apparatus according to claim 1, characterised in that the register plate at least in one most forward area (17) comprises ventilation openings (20) on its front edge (29).
8. Register insertion apparatus according to claim 1, characterised in that the register plate (15) comprises suction areas (B1, B2, B3) with differing, adjustable suction powers or with separate vacuum feed lines (21).
9. Register insertion apparatus according to claim 1, characterised in that in a most forward area (17) of the register plate a higher suction power is provided.
10. Register insertion apparatus according to claim 1, characterised in that the surface (19) of the register plate in the area of ventilation openings (20) comprises an enhanced static friction.
11. Register insertion apparatus according to claim 10, characterised in that the surface (19) at least in the most forward area (17) comprises a rubber coating (24).
12. Register insertion apparatus according to claim 1, characterised in that additional picture - print correction values (X1.1, X2.1, Y3.1) are capable of being entered into the register controller (11).
13. Register insertion apparatus according to claim 1, characterised in that the sheet (5) is braked, resp., slowed-down by a feeder device of a feeder (3) shortly before its arrival at the front stops (12).
14. Register insertion apparatus according to claim 1, characterised in that the front position sensors (S1, S2) are arranged at a short distance (d) of 1 - 3 mm in front of the front printing marks (P1, P2) when the sheet is standing still.
15. Embossing machine with a register insertion apparatus (10) according to one of the preceding claims and with an operating and display device (9).

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