EP0120348B1 - Apparatus for the uninterrupted positioning of sheets - Google Patents

Apparatus for the uninterrupted positioning of sheets Download PDF

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Publication number
EP0120348B1
EP0120348B1 EP84102303A EP84102303A EP0120348B1 EP 0120348 B1 EP0120348 B1 EP 0120348B1 EP 84102303 A EP84102303 A EP 84102303A EP 84102303 A EP84102303 A EP 84102303A EP 0120348 B1 EP0120348 B1 EP 0120348B1
Authority
EP
European Patent Office
Prior art keywords
sheet
suction
alignment
drive
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84102303A
Other languages
German (de)
French (fr)
Other versions
EP0120348A2 (en
EP0120348A3 (en
Inventor
Willi Jeschke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0120348A2 publication Critical patent/EP0120348A2/en
Publication of EP0120348A3 publication Critical patent/EP0120348A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H11/00—Feed tables
    • B65H11/002—Feed tables incorporating transport belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H11/00—Feed tables
    • B65H11/007—Feed tables with front stop arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/12—Revolving grippers, e.g. mounted on arms, frames or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/24—Feeding articles in overlapping streams, i.e. by separation of articles from a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a device for the flowing application of sheets, which are fed over a feed table, offset in scales, to an alignment device and, after the alignment process, are delivered to a sheet-processing machine, the front edge alignment being effected by an alignment cylinder with front marks which are moved synchronously with the sheet-processing machine, which in the Alignment cylinder is a suction bar positioned in the axial direction upstream, which acts as a gripping means, the sheets maintaining their movement towards the sheet processing machine during the alignment.
  • DE-AS 12 10 900 has already disclosed a device for the smooth application of arches. Specifically, it is a sheet feeder for printing and sheet processing machines with sheet conveyors which act on both sides of the sheet center and can be controlled independently of one another.
  • the control of the sheet conveying means effect light barriers, at least two of which are arranged one behind the other in the conveying direction.
  • the control pulses of these sensing elements which are designed as light barriers, vary the conveying speed of the respectively assigned sheet conveying means via a differential circuit such that the leading edge of the sheet approaches the takeover point in synchronous speed parallel to the gripper system and is taken over by the machine without a previous stop.
  • the lateral alignment of the sheet takes place at the same time as it is moving to the takeover point of the machine by means of a diagonal drive with the aid of lateral control marks.
  • the sheets which are placed in a scale from the stack to the table, are to be pulled apart there by increasing the speed so that they pass the table in single sequence.
  • a single sheet feeder which performs the front and side edge alignment of the sheets by means of a continuously rotating alignment cylinder when the sheet is conveyed fluently.
  • the leading edges of the sheets that are fed individually over the feed table are placed against the front marks provided on the circumference of the alignment cylinder.
  • the side alignment takes place by means of suction strips arranged axially displaceably on the alignment cylinder.
  • the sheet touching the front marks is moved by the suction strips against a side stop during the cylinder rotation.
  • the object of the invention is to achieve a safe front and side edge alignment with the most gentle treatment of the sheet edges and for all types of paper to be processed with a flowing sheet system.
  • the above object is achieved in that at least two rows of front marks are arranged in the alignment cylinder, evenly distributed over the circumference, and that sensors belonging to a positioning device are provided above the alignment cylinder, which sensors scan the side edge of the sheet passed in the alignment area, as a result of which the positioning device the suction strip in this way controls that the sheet lying against the front marks and firmly sucked in by the squeegee is shifted into the desired lateral position and is held there until other conveying elements which further convey it take over in a fitting manner.
  • a particularly simple development of the invention consists in that the alignment cylinder is also simultaneously designed as a pre-gripper cylinder and, provided with at least one front and side edge alignment device, is cyclically non-uniformly driven.
  • sheets 2 are conveyed in a scale-like manner by transport members, symbolized by the roller 5 and the conveyor belt 25, in the direction of the sheet-processing machine.
  • the foremost bow 4 of the scale is gripped by an alignment cylinder 20 which is mounted below the lower end of the feed table 1 in the machine side walls 21 and 22.
  • the bearing of the shaft 23 of the alignment cylinder 20 consists of one roller bearing 24 each.
  • the alignment cylinder 20 is followed by a half-speed pre-gripper cylinder 3, which can be driven cyclically non-uniformly and transfers the sheet taken over to the printing cylinder 50 of the first printing unit of the sheet-processing machine.
  • the frontmost sheet 4 of the scale is placed and aligned with its front edge against a row of front marks 6 of the alignment cylinder 20. After its alignment, the sheet 4 is sucked in by a suction strip 8 in such a way that static friction arises. Due to this fixed suction, the sheet 4 of the scale is conveyed into the alignment area 26 by the counterclockwise rotating alignment cylinder 20. After the side alignment, which will be described in detail later, the alignment cylinder 20 transfers the aligned sheet to a gripper bridge 27 of the Pre-gripper cylinder 3.
  • the alignment cylinder 20 is provided with five rows of front marks 6 arranged symmetrically offset on the circumference. A suction squeegee 8 is directly assigned to each of these front row rows.
  • the special design of the alignment cylinder 20 can be found in detail in FIGS. 2 and 3.
  • arc guide segments 28 are provided in the lateral surface of the alignment cylinder 20. They are mounted on a traverse 29 so that they can be adjusted in the axial direction of the alignment cylinder 20 in such a way that a query gap 15 for a positioning device can be formed between two of them.
  • the longitudinal extent of the arc guide segments 28 extending in the circumferential direction corresponds approximately to the circumferential length of the alignment region 26.
  • a traverse 49 extending across the machine is fastened in the side walls 21 and 22 above the alignment cylinder 20, on which one or two sensors 16 of a positioning device, not shown, are slidably arranged. These sensors 16 are used to trigger a signal when the side edge of the sheet 4 passes the positioning device for corresponding control of the suction strip 8.
  • the sensors 16 are set to the sheet format to be processed in each case.
  • the sheet guide segments 28 provided in this area are also arranged relative to one another in such a way that an interrogation gap 15 is formed directly underneath the sensor 16.
  • the aligned sheet 4 is passed on from the alignment cylinder 20 to the gripper bridge 27 of the pre-gripper cylinder 3.
  • the two gripper bridges 27 are pivotally arranged in the pre-gripper cylinder 3 such that, after the sheet has been picked up, they gradually pivot back onto the circumference of the pre-gripper cylinder 3, whereby the detected sheet 4 gradually increases from the relatively low circumferential speed of the alignment cylinder 20 the higher peripheral speed of the pre-gripper cylinder 3 is accelerated.
  • a roller lever 33 is fastened, the free end of which is provided with a guide roller 34, which cooperates on a control cam 35 rotating with the alignment cylinder 20.
  • the mentioned supports 36 are fixedly mounted on the swivel shaft 31 which runs coaxially in the alignment cylinder 20.
  • the front label cover gripper 30 When the carrier 36 is pivoted in the opposite direction, the front label cover gripper 30 initially pivots out of its retracted position beyond the circumference of the alignment cylinder and are then tilted into their sheet guiding position.
  • a sheet guiding surface 37 is provided over a certain area in front of each row of front marks 6 in the circumference of the alignment cylinder 20.
  • the suction strip 8 consists essentially of a series of mutually sealed suction chambers 10. These are connected via air lines 38 to a valve body 39 in such a way that the two outer suction chamber groups by means of valves 40 depending on the size of the can be switched on or off to be processed sheet format.
  • the valve body 39 is fixedly attached to the shaft 23 of the alignment cylinder 20. Via a seal 41, it cooperates with a valve ring 42 which is fastened to the machine side wall 21 of the sheet-processing machine.
  • a suction opening 44 and a fresh air opening 45 are provided in the control surface 43 of the valve ring 42 at the same radial height from the axis of rotation of the alignment cylinder 20.
  • the control surface 46 of the valve body 39 has an air control opening 47 for each suction pull bar 8, to which all air lines 38 of the suction chambers 10 of the associated suction strips 8 are connected.
  • the air control openings 47 are at the same radial height as the suction and fresh air openings.
  • the width of the air control openings 47 corresponds approximately to the distance between the suction opening 44 and the fresh air opening 45.
  • the suction opening 44 of the valve ring 42 is connected via an air line 48 to a vacuum generator, not shown.
  • suction opening 44, the fresh air opening 45 and the air control opening 47 are such that the negative pressure generated in the respective suction pulling strip 8 is sufficient to hold the sheet 4 by means of static friction and, on the other hand, immediately collapses when fresh air is supplied as soon as the gripper bridge 27 fits the sheet leading edge precisely has firmly taken over.
  • FIG. 3 shows a section through the sheet feeder at the level of the alignment drum 20 as seen from the sheet processing machine
  • the drive of the suction pulling bars 8 is located on the drive side of the sheet feeder.
  • This drive initially consists of a stepper motor 11 with a reduction gear, which is fastened to the side wall 22 by means not shown.
  • two drive cams 12 of the same design are fastened, which are diametrically opposed to one another in such a way that their two cam tracks always have the same distance in the diagonal direction to the axis of rotation of the stepping motor 11.
  • a cam roller 13 runs on each of these drive curves 12: Both cam rollers are fastened to a drive rod 54 via a bearing block 53.
  • Drive curves 12 and cam rollers 13 work together in such a way that the rotational movement of the stub shaft 14 of the stepping motor 11 is transmitted to the drive rod 54 without play.
  • the drive rod 54 is axially displaceably mounted, one in the guide bracket 55 and the other in the machine side wall 22. Both bearings consist of ball bushings 56.
  • the free end of the drive rod 54, which projects into the interior of the machine, is provided with a control segment 57, which can come into engagement with drive rollers 58 of each squeegee 8, in such a way that the axial drive movement of the drive rod 54 is transmitted to the squeegee 8 to be driven in each case without play.
  • the control segment 57 is displaceably accommodated in a recess of a return disk 59 in the axial direction of the drive rod 54.
  • a guide 60 protrudes into this recess of the return disk 59.
  • a guide roller 61 runs in it. It is rotatably attached to the underside of the control segment 57. Guide 60 and guide roller 61 together prevent the drive rod 54 from rotating. Both the guide 60 and the return disk 59 are fastened to the machine side wall 22.
  • FIG. 5 shows the essential working positions of the control segment 57.
  • the control segment 57 is in its central zero position. It takes up this position before an adjustment of a suction pulling strip 8 is to be carried out.
  • the drive rollers 58 which are normally guided by the return disk 59, have a suction pull bar 8 which, as can be seen from the above, rotates with the alignment cylinder 20, has just reached the control segment 57. At this moment, the adjustment process of the suction strip 8 can begin.
  • the stepper motor 11 rotates the drive curves 12 via its shaft end 14 in such a way that the drive rod 54 is pulled via the cam rollers 13 in the direction of the drive side of the sheet-processing machine. After the maximum stroke has been covered, the suction strip 8 stops. This position is shown in Figure 4. If, on the other hand, the stepping motor 11 is controlled by the positioning device, which is normally the case, the control segment 57 stops at any desired point before the maximum stroke is reached. The adjusted suction strip 8 travels the necessary alignment stroke. When the alignment process is complete, the aligned sheet 4 is taken over by funding. After this adjustment process, the return disk 59 returns the suction strip 8 to the zero position.
  • the stepper motor 11 is also switched accordingly. Accordingly, it moves the drive rod 54 into the interior of the machine during the alignment process, to a maximum of the position shown in FIG. 6. With appropriate positioning, the control segment 57 naturally also comes to a standstill in front of this end position, because the suction strip 8 has reached the desired position of the sheet to be aligned. In this position, the suction strip 8 holds the aligned sheet until it has been taken over by the pre-gripper cylinder 3. After the sheet has been handed over, the adjusted suction strip 8 is returned to the zero position by means of the return disk 59.
  • the side edge alignment then begins in the alignment region 26. It is opened by firmly sucking the front area of the sheet 4 to be aligned against the suction surface 9 of the suction strip 8. The suction force is such that static friction is generated between the underside of the sheet and the suction surface 9. The sheet 4 has thus been gripped after the leading edge alignment.
  • the gripper bridge 27 If the gripper bridge 27 has securely gripped the aligned sheet 4, the air control opening 47 of the valve body 39 of the suction strip 8 which has just been subjected to a vacuum reaches the fresh air opening 45, as a result of which the vacuum suddenly breaks down due to the supply of fresh air. The static friction between the suction surface 9 of the suction strip 8 and the underside of the sheet 4 is eliminated. The sheet 4, which is in the correct position, can now be lifted off the sheet guiding surface 37 by the gripper bridge 27.
  • the carrier 36 is pivoted by means of the control shaft 31.
  • the guide roller 34 runs along the control cam 35 and first of all causes the front label cover gripper to be lifted off 30 from the sheet 4 and then swiveling the front mark cover grippers 30 into the alignment cylinder 20.
  • the gripper bridge 27 of the feed cylinder 3 can now remove the aligned sheet 4 from the lateral surface of the alignment cylinder 20.
  • the suction strip 8 just used is moved back into the zero position according to FIG. 5 during the further rotation of the alignment cylinder 20.
  • each suction strip 8 is again in readiness.
  • the front mark cover grippers 30 are pivoted out in this position, so that a secure contact of the leading edge of the sheet 4 now to be aligned with the front marks 6 is ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur fließenden Anlage von Bögen, die über einen Anlegetisch, schuppenförmig versetzt, einer Ausrichtvorrichtung zugefuhrt und nach dem Ausrichtvorgang an eine bogenverarbeitende Maschine abgegeben werden, wobei die Vorderkantenausrichtung durch einen synchron zur bogenverarbeitenden Maschine bewegten Ausrichtzylinder mit Vordermarken erfolgt, denen im Ausrichtzylinder eine in axialer Richtung positionierbare Saugleiste vorgelagert ist, die als Greifmittel wirkt, wobei die Bögen während der Ausrichtung ihre Bewegung in Richtung auf die bogenverarbeitende Maschine beibehalten.The invention relates to a device for the flowing application of sheets, which are fed over a feed table, offset in scales, to an alignment device and, after the alignment process, are delivered to a sheet-processing machine, the front edge alignment being effected by an alignment cylinder with front marks which are moved synchronously with the sheet-processing machine, which in the Alignment cylinder is a suction bar positioned in the axial direction upstream, which acts as a gripping means, the sheets maintaining their movement towards the sheet processing machine during the alignment.

Durch die DE-AS 12 10 900 ist bereits eine Vorrichtung zur fließenden Anlage von Bögen bekannt geworden. Im einzelnen handelt es sich dabei um einen Bogenanleger für Druck- und Bogenverarbeitungsmaschinen mit beiderseitig der Bogenmitte angreifenden, unabhängig voneinander steuerbaren Bogenfördermitteln. Die Steuerung der Bogenfördermittel bewirken Lichtschranken, von denen jeweils mindestens zwei in Förderrichtung hintereinander angeordnet sind. Die Steuerimpulse dieser als Lichtschranken ausgebildeten Fühlelemente variieren die Fördergeschwindigkeit der jeweils zugeordneten Bogenfördermittel über eine Differenzschaltung derart, daß sich die Bogenvorderkante parallel zu dem Greifersystem in synchroner Geschwindigkeit dem Übernahmepunkt nähert und ohne vorherigen Stop von der Maschine übernommen wird. Die seitliche Ausrichtung des Bogens erfolgt gleichzeitig während dessen Fortbewegung zum Übernahmepunkt der Maschine durch einen Diagonaltrieb unter Zuhilfenahme seitlicher Steuermarken.DE-AS 12 10 900 has already disclosed a device for the smooth application of arches. Specifically, it is a sheet feeder for printing and sheet processing machines with sheet conveyors which act on both sides of the sheet center and can be controlled independently of one another. The control of the sheet conveying means effect light barriers, at least two of which are arranged one behind the other in the conveying direction. The control pulses of these sensing elements, which are designed as light barriers, vary the conveying speed of the respectively assigned sheet conveying means via a differential circuit such that the leading edge of the sheet approaches the takeover point in synchronous speed parallel to the gripper system and is taken over by the machine without a previous stop. The lateral alignment of the sheet takes place at the same time as it is moving to the takeover point of the machine by means of a diagonal drive with the aid of lateral control marks.

Die schuppenförmig vom Stapel auf den Tisch gebrachten Bogen sollen dort durch Geschwindigkeitserhöhung so auseinander gezogen werden daß sie in einzelner Folge den Tisch passieren.The sheets, which are placed in a scale from the stack to the table, are to be pulled apart there by increasing the speed so that they pass the table in single sequence.

Hierfür ist zunächst ein relativ langer Anlegetisch notwendig. Durch die Kombination der Vorwärts- und Seitenbewegung des Bogens sowie durch das Gleiten der Bogenseitenkante an der Seitenmarke ist die exakte Ausrichtung des Bogens zum Zeitpunkt der Übernahme nicht gewährleistet. Die Erfahrung lehrt, daß der Bogen, sofern er sich selbst überlassen bleibt, unvorhersehbar reagiert, allein schon deshalb, weil die Bogen hinsichtlich ihrer Oberflächenbeschaffenheit und Seitenkantenausbildung sowie bezüglich ihres Gewichts und ihrer Steifigkeit sehr differieren.This requires a relatively long feed table. The combination of the forward and side movement of the sheet and the sliding of the sheet side edge on the side mark does not guarantee the exact alignment of the sheet at the time of transfer. Experience has shown that the sheet, if left to its own devices, reacts unpredictably if only because the sheets differ greatly in terms of their surface properties and side edge formation, as well as in terms of their weight and rigidity.

Aus der US-A 2 231 914 ist ferner ein Einzelbogenanleger bekannt, der bei fließender Bogenförderung die Vorder- und Seitenkantenausrichtung der Bogen mittels eines kontinuierlich rotierende Ausrichtzylinders vornimmt. Die über den Anlegetisch vereinzelt zugeführten Bogen werden mit ihrer Vorderkante gegen die am Umfang des Ausrichtzylinders vorgesehenen Vordermarken angelegt. Die Seitenausrichtung erfolgt mittels auf dem Ausrichtzylinder axial verschiebbar angeordneter Saugleisten. Der an den Vordermarken anliegende Bogen wird während der Zylinderdrehung von den Saugleisten gegen einen seitlichen Anschlag bewegt.From US-A 2 231 914 a single sheet feeder is also known which performs the front and side edge alignment of the sheets by means of a continuously rotating alignment cylinder when the sheet is conveyed fluently. The leading edges of the sheets that are fed individually over the feed table are placed against the front marks provided on the circumference of the alignment cylinder. The side alignment takes place by means of suction strips arranged axially displaceably on the alignment cylinder. The sheet touching the front marks is moved by the suction strips against a side stop during the cylinder rotation.

Da die bekannte Vorrichtung nur Einzelbogenanlage gestattet, ist die Fördergeschwindigkeit sehr begrenzt. Vor allem aber besteht durch die Verwendung von Seitenanschlägen die Gefahr der Deformierung der Seitenkanten dünner Bogen, wodurch Fehlausrichtungen nicht auszuschließen sind.Since the known device only allows single sheet feeding, the conveying speed is very limited. Above all, however, there is a risk of the side edges of thin sheets being deformed through the use of side stops, which means that misalignments cannot be ruled out.

Aufgabe der Erfindung ist es, bei fließender Bogenanlage eine sichere Vorder- und Seitenkantenausrichtung bei schonendster Behandlung der Bogenkanten und für alle zu verarbeitenden Papiersorten zu erzielen.The object of the invention is to achieve a safe front and side edge alignment with the most gentle treatment of the sheet edges and for all types of paper to be processed with a flowing sheet system.

Erfindungsgemäß wird obige Aufgabe dadurch gelöst, daß in dem Ausrichtzylinder gleichmäßig über den Umfang verteilt mindestens zwei Reihen Vordermarken angeordnet sind und daß oberhalb des Ausrichtzylinders einer Positioniereinrichtung angehörende Sensoren vorgesehen sind, die die Seitenkante des im Ausrichtbereich vorbeigeführten Bogens abtasten, wodurch die Positioniereinrichtung die Saugleiste derart steuert, daß der an den Vordermarken anliegende und von der Saugleiste fest angesaugte Bogen in die seitliche Soll-Lage verschoben und dort so lange gehalten wird, bis ihn andere weiterfördernde Transportorgane paßgerecht übernehmen.According to the invention, the above object is achieved in that at least two rows of front marks are arranged in the alignment cylinder, evenly distributed over the circumference, and that sensors belonging to a positioning device are provided above the alignment cylinder, which sensors scan the side edge of the sheet passed in the alignment area, as a result of which the positioning device the suction strip in this way controls that the sheet lying against the front marks and firmly sucked in by the squeegee is shifted into the desired lateral position and is held there until other conveying elements which further convey it take over in a fitting manner.

Die zwangsläufige Vorderkantenausrichtung sowie das feste Halten des auszurichtenden Bogens durch Greifmittel während seiner Seitenausrichtung bis zur Abnahme durch weiterfördernde Transportorgane ermöglicht es, den Bogen ohne Fehler oder Beschädigung paßgerecht auszurichten. Durch geeignete Anordnung von Vorderkanten- und Seitenkantenausrichtmittein kann der Schuppenabstand außerordentlich klein ausfallen.-Infolge der gezielten Anlage und Führung der Bogen während des Ausrichtens sind Ausrichtfehler nicht zu besorgen, obwohl kein Bogenstillstand notwendig ist. Die Unterbringung mehrerer Ausrichteinheiten im Ausrichtzylinder ermöglicht es, die Maschinengeschwindigkeit zu erhöhen. Die Ausrichtezeit wird verlängert. Eine Positioniereinrichtung für die Saugziehleiste kann auch Registerkorrekturen mitberücksichtigen.The inevitable front edge alignment as well as the firm hold of the sheet to be aligned by gripping means during its side alignment until it is removed by further conveying elements makes it possible to align the sheet to fit without errors or damage. With a suitable arrangement of the front edge and side edge alignment center, the scale spacing can be extraordinarily small. As a result of the targeted positioning and guiding of the sheets during alignment, alignment errors cannot be worried, although no sheet stoppage is necessary. The accommodation of several alignment units in the alignment cylinder makes it possible to increase the machine speed. The alignment time is extended. A positioning device for the squeegee can also take register corrections into account.

Eine besonders einfache Weiterbildung der Erfindung besteht darin, daß der Ausrichtzylinder auch gleichzeitig als Vorgreiferzylinder ausgebildet ist und, mit mindestens einer Vorder- und Seitenkantenausrichtvorrichtung versehen, zyklisch ungleichförmig angetrieben ist.A particularly simple development of the invention consists in that the alignment cylinder is also simultaneously designed as a pre-gripper cylinder and, provided with at least one front and side edge alignment device, is cyclically non-uniformly driven.

Eine Ausführungsform der Erfindung wird nachfolgend anhand der Zeichnung be schrieben.An embodiment of the invention is described below with reference to the drawing.

Es zeigt:

  • Figur 1 einen Anlegetisch mit einem Ausrichtzylinder nach der Erfindung,
  • Figur 2 den Ausrichtzylinder in vergrößertem Maßstab im Ausrichtbereich,
  • Figur 3 einen Schnitt durch den Bogenanleger in der Höhe des Ausrichtzylinders von der bogenverarbeitenden Maschine aus gesehen, und die
  • Figuren 4 bis 6 in vergrößertem Maßstab Einzelheiten des Antriebs der Saugziehleiste.
It shows:
  • FIG. 1 shows a feed table with an alignment cylinder according to the invention,
  • FIG. 2 shows the alignment cylinder on an enlarged scale in the alignment area,
  • Figure 3 shows a section through the sheet feeder seen at the level of the alignment cylinder from the sheet processing machine, and the
  • Figures 4 to 6 on an enlarged scale details of the drive of the suction strip.

Über den Anlegetisch 1 nach Figur 1 werden Bögen 2 schuppenförmig versetzt von Transportorganen, symbolisiert durch die Walze 5 und das Transportband 25, in Richtung auf die bogenverarbeitende Maschine befördert. Der jeweils vorderste Bogen 4 der Schuppe wird von einem Ausrichtzylinder 20 erfaßt, der unterhalb des unteren Endes des Anlegetisches 1 in den Maschinenseitenwänden 21 und 22 gelagert ist. Wie aus Figur 3 zu ersehen ist, besteht die Lagerung der Welle 23 des Ausrichtzylinders 20 aus je einem Wälzlager 24.Over the feed table 1 according to FIG. 1, sheets 2 are conveyed in a scale-like manner by transport members, symbolized by the roller 5 and the conveyor belt 25, in the direction of the sheet-processing machine. The foremost bow 4 of the scale is gripped by an alignment cylinder 20 which is mounted below the lower end of the feed table 1 in the machine side walls 21 and 22. As can be seen from FIG. 3, the bearing of the shaft 23 of the alignment cylinder 20 consists of one roller bearing 24 each.

Dem Ausrichtzylinder 20 ist ein halbtouriger Vorgreiferzylinder 3 nachgeschaltet, der zyklisch ungleichförmig angetrieben sein kann und den übernommenen Bogen dem Druckzylinder 50 des ersten Druckwerks der bogenverarbeitenden Maschine übergibt. Der jeweils vorderste Bogen 4 der Schuppe wird mit seiner Vorderkante gegen eine Reihe von Vordermarken 6 des Ausrichtzylinders 20 angelegt und ausgerichtet. Nach seiner Ausrichtung wird der Bogen 4 von einer Saugziehleiste 8 derart angesaugt, daß Haftreibung entsteht. Aufgrund dieser festen Ansaugung wird der Bogen 4 der Schuppe durch den entgegen dem Uhrzeigersinn drehenden Ausrichtzylinder 20 in den Ausrichtbereich 26 befördert.. Nach erfolgter Seitenausrichtung, die später noch im einzelnen zu beschreiben ist, übergibt der Ausrichtzylinder 20 den ausgerichteten Bogen an eine Greiferbrücke 27 des Vorgreiferzylinders 3.The alignment cylinder 20 is followed by a half-speed pre-gripper cylinder 3, which can be driven cyclically non-uniformly and transfers the sheet taken over to the printing cylinder 50 of the first printing unit of the sheet-processing machine. The frontmost sheet 4 of the scale is placed and aligned with its front edge against a row of front marks 6 of the alignment cylinder 20. After its alignment, the sheet 4 is sucked in by a suction strip 8 in such a way that static friction arises. Due to this fixed suction, the sheet 4 of the scale is conveyed into the alignment area 26 by the counterclockwise rotating alignment cylinder 20. After the side alignment, which will be described in detail later, the alignment cylinder 20 transfers the aligned sheet to a gripper bridge 27 of the Pre-gripper cylinder 3.

Bei vorliegender Ausführungsform der Erfindung ist der Ausrichtzylinder 20 mit fünf symmetrisch am Umfang versetzt angeordneten Reihen von Vordermarken 6 versehen. Jeder dieser Vordermarkenreihen ist eine Saugziehleiste 8 unmittelbar zugeordnet. Die spezielle Ausbildung des Ausrichtzylinders 20 ist im einzelnen den Figuren 2 und 3 zu entnehmen. Zwischen zwei benachbarten Gruppen von Ausrichtorganen sind Bogenführungssegmente 28 in der Mantelfläche des Ausrichtzylinders 20 vorgesehen. Sie sind auf einer Traverse 29 in axialer Richtung des Ausrichtzylinders 20 derart verstellbar gelagert, daß zwischen jeweils zwei von ihnen ein Abfragespalt 15 für eine Positioniereinrichtung gebildet werden kann. Die in Umfangsrichtung verlaufende Längenausdehnung der Bogenführungssegmente 28 entspricht etwa der Umfangslänge des Ausrichtbereichs 26.In the present embodiment of the invention, the alignment cylinder 20 is provided with five rows of front marks 6 arranged symmetrically offset on the circumference. A suction squeegee 8 is directly assigned to each of these front row rows. The special design of the alignment cylinder 20 can be found in detail in FIGS. 2 and 3. Between two adjacent groups of alignment members, arc guide segments 28 are provided in the lateral surface of the alignment cylinder 20. They are mounted on a traverse 29 so that they can be adjusted in the axial direction of the alignment cylinder 20 in such a way that a query gap 15 for a positioning device can be formed between two of them. The longitudinal extent of the arc guide segments 28 extending in the circumferential direction corresponds approximately to the circumferential length of the alignment region 26.

Zwischen dem Anlegetisch 1 und dem Vorgreiferzylinder 3 ist oberhalb des Ausrichtzylinders 20 eine sich quer über die Maschine erstreckende Traverse 49 in den Seitenwänden 21 und 22 befestigt, auf denen verschiebbar ein oder zwei Sensoren 16 einer nicht näher dargestellten Positioniereinrichtung angeordnet sind. Diese Sensoren 16 dienen zur Auslösung eines Signals bei Passieren der Seitenkante des Bogens 4 an die Positioniereinrichtung zur entsprechenden Steuerung der Saugziehleiste 8. Die Sensoren 16 werden auf das jeweilig zu verarbeitende Bogenformat eingestellt. Der eingestellten Lage eines Sensors 16 entsprechend, werden auch die in diesem Bereich vorgesehenen Bogenführungssegmente 28 derart zueinander angeordnet, daß un mittelbar unterhalb des Sensors 16 ein Abfragespalt 15 entsteht.Between the feed table 1 and the pre-gripper cylinder 3, a traverse 49 extending across the machine is fastened in the side walls 21 and 22 above the alignment cylinder 20, on which one or two sensors 16 of a positioning device, not shown, are slidably arranged. These sensors 16 are used to trigger a signal when the side edge of the sheet 4 passes the positioning device for corresponding control of the suction strip 8. The sensors 16 are set to the sheet format to be processed in each case. Corresponding to the set position of a sensor 16, the sheet guide segments 28 provided in this area are also arranged relative to one another in such a way that an interrogation gap 15 is formed directly underneath the sensor 16.

Von dem Ausrichtzylinder 20 wird der ausgerichtete Bogen 4 an die Greiferbrücke 27 des Vorgreiferzylinders 3 weitergegeben. In bekannter Weise sind die beiden Greiferbrücken 27 in dem Vorgreiferzylinder 3 verschwenkbar angeordnet, derart, daß sie nach der Bogenübernahme aus einer herausgeschwenkten Stellung auf den Umfang des Vorgreiferzylinders 3 allmählich zurückschwenken, wodurch der erfaßte Bogen 4 von der relativ niedrigen Umfangsgeschwindigkeit des Ausrichtzylinders 20 allmählich auf die höhere Umfangsgeschwindigkeit des Vorgreiferzyinders 3 beschleunigt wird.The aligned sheet 4 is passed on from the alignment cylinder 20 to the gripper bridge 27 of the pre-gripper cylinder 3. In a known manner, the two gripper bridges 27 are pivotally arranged in the pre-gripper cylinder 3 such that, after the sheet has been picked up, they gradually pivot back onto the circumference of the pre-gripper cylinder 3, whereby the detected sheet 4 gradually increases from the relatively low circumferential speed of the alignment cylinder 20 the higher peripheral speed of the pre-gripper cylinder 3 is accelerated.

Die über eine in dem Ausrichtzylinder 20 gelagerte Schwenkwelle 31 gesteuerten Vordermarkenabdeckungsgreifer 30 werden über zwei Träger 36 von einer Greiferwelle 32 kippbar gehalten. Auf der Greiferwelle 32 ist ein Rollenhebel 33 befestigt, dessen freies Ende mit einer Führungsrolle 34 versehen ist, die auf einer mit dem Ausrichtzylinder 20 umlaufenden Steuerkurve 35 zusammenwirkt. Die erwähnten Träger 36 sind auf der in dem Ausrichtzylinder 20 koaxial verlaufenden Schwenkwelle 31 fest angebracht. Durch Verschwenken der Träger 36 mittels der Steuerwelle 31 erfolgt ein Abheben der Vordermarkenabdeckungsgreifer 30 von dem Bogen 4 und unmittelbar danach ein Hineinziehen dieser Greiferreihe in das innere des Umfangs des Ausrichtzylinders 20. Bei entgegengesetzter Schwenkrichtung der Träger 36 schwenken die Vordermarkenabdeckungsgreifer 30 zunächst aus ihrer eingefahrenen Stellung über den Umfang des Ausrichtzylinders hinaus und werden danach in ihre Bogenführungsstellung gekippt. Über einen gewissen Bereich vor jeder Reihe von Vordermarken 6 ist im Umfang des Ausrichtzylinders 20 eine Bogenführungsfläche 37 vorgesehen.The front mark cover grippers 30, which are controlled by a pivot shaft 31 mounted in the alignment cylinder 20, are held in a tiltable manner by a gripper shaft 32 via two carriers 36. On the gripper shaft 32, a roller lever 33 is fastened, the free end of which is provided with a guide roller 34, which cooperates on a control cam 35 rotating with the alignment cylinder 20. The mentioned supports 36 are fixedly mounted on the swivel shaft 31 which runs coaxially in the alignment cylinder 20. By pivoting the carrier 36 by means of the control shaft 31, the front label cover gripper 30 is lifted from the sheet 4 and immediately thereafter this row of grippers is drawn into the interior of the circumference of the aligning cylinder 20. When the carrier 36 is pivoted in the opposite direction, the front label cover gripper 30 initially pivots out of its retracted position beyond the circumference of the alignment cylinder and are then tilted into their sheet guiding position. A sheet guiding surface 37 is provided over a certain area in front of each row of front marks 6 in the circumference of the alignment cylinder 20.

Wie aus Figur 3 näher zu ersehen ist, besteht die Saugziehleiste 8 im wesentlichen aus einer Reihe gegeneinander abgeschlossener Saugkammern 10. Diese sind über Luftleitungen 38 mit einem Ventilkörper 39 verbunden und zwar derart, daß die beiden äußeren Saugkammergruppen mittels Ventile 40 je nach der Größe des zu verarbeitenden Bogenformats zu- oder abgeschaltet werden können. Der Ventilkörper 39 ist fest auf der Welle 23 des Ausrichtzylinders 20 angebracht. Über eine Dichtung 41 arbeitet er mit einem Ventilring 42 zusammen, der an der Maschinenseitenwand 21 der bogenverarbeitenden Maschine befestigt ist. In der Steuerfläche 43 des Ventilrings 42 sind in gleicher radialer Höhe von der Drehachse des Ausrichtzylinders 20 aus gesehen, eine Saugöffnung 44 sowie eine Frischluftöffnung 45 vorgesehen. Die Steuerfläche 46 des Ventilkörpers 39 hingegen weist für jede Saugziehleiste 8 eine Luftsteueröffnung 47 auf, an die alle Luftleitungen 38 der Saugkammern 10 der zugeordneten Saugziehleisten 8 angeschlossen sind. Wie Figur 2 zeigt, befinden sich die Luftsteueröffnungen 47 in gleicher radialer Höhe, wie die Saug- und Frischluftöffnungen. Die Breite der Luftsteueröffnungen 47 entspricht etwa dem Abstand zwischen der Saugöffnung 44 und der Frischluftöffnung 45. Zur Erzeugung eines Unterdrucks ist die Saugöffnung 44 des Ventilrings 42 über eine Luftleitung 48 an einen nicht dargestellten Unterdruckerzeuger angeschlossen. Die Abmessungen der Saugöffnung 44, der Frischluftöffnung 45 und der Luftsteueröffnung 47 sind derart, daß der in der jeweilig arbeitenden Saugziehleiste 8 erzeugte Unterdruck zum Halten des Bogens 4 mittels Haftreibung ausreicht und andererseits bei Zufuhr von Frischluft sofort zusammenbricht, sobald die Greiferbrücke 27 die Bogenvorderkante passergenau fest übernommen hat.As can be seen from Figure 3, the suction strip 8 consists essentially of a series of mutually sealed suction chambers 10. These are connected via air lines 38 to a valve body 39 in such a way that the two outer suction chamber groups by means of valves 40 depending on the size of the can be switched on or off to be processed sheet format. The valve body 39 is fixedly attached to the shaft 23 of the alignment cylinder 20. Via a seal 41, it cooperates with a valve ring 42 which is fastened to the machine side wall 21 of the sheet-processing machine. A suction opening 44 and a fresh air opening 45 are provided in the control surface 43 of the valve ring 42 at the same radial height from the axis of rotation of the alignment cylinder 20. The control surface 46 of the valve body 39, on the other hand, has an air control opening 47 for each suction pull bar 8, to which all air lines 38 of the suction chambers 10 of the associated suction strips 8 are connected. As FIG. 2 shows, the air control openings 47 are at the same radial height as the suction and fresh air openings. The width of the air control openings 47 corresponds approximately to the distance between the suction opening 44 and the fresh air opening 45. To generate a vacuum, the suction opening 44 of the valve ring 42 is connected via an air line 48 to a vacuum generator, not shown. The dimensions of the suction opening 44, the fresh air opening 45 and the air control opening 47 are such that the negative pressure generated in the respective suction pulling strip 8 is sufficient to hold the sheet 4 by means of static friction and, on the other hand, immediately collapses when fresh air is supplied as soon as the gripper bridge 27 fits the sheet leading edge precisely has firmly taken over.

Da, wie oben erwähnt, die Figur 3 einen Schnitt durch den Bogenanleger auf der Höhe der Ausrichttrommel 20 von der bogenverarbeitenden Maschine her gesehen darstellt, befindet sich der Antrieb der Saugziehleisten 8 an der Antriebsseite des Bogenanlegers. Dieser Antrieb besteht zunächst aus einem Schrittmotor 11 mit einem Untersetzungsgetriebe, der über nicht dargestellte Mittel an der Seitenwand 22 befestigt ist. Auf seinem Wellenstumpf 14 sind zwei gleich ausgebildete Antriebskurven 12 befestigt, die einander derart diametral gegenüber stehen, daß in diagonaler Richtung zur Drehachse des Schrittmotors 11 deren beiden Kurvenbahnen stets den gleichen Abstand haben. Auf diesen Antriebskurven 12 laufen je eine Kurvenrolle 13: Beide Kurvenrollen sind über je einen Lagerbock 53 an einer Antriebsstange 54 befestigt. Antriebskurven 12 und Kurvenrollen 13 arbeiten derart zusammen, daß die Drehbewegung des Wellenstumpfes 14 des Schrittmotors 11 spielfrei auf die Antriebsstange 54 übertragen wird.Since, as mentioned above, FIG. 3 shows a section through the sheet feeder at the level of the alignment drum 20 as seen from the sheet processing machine, the drive of the suction pulling bars 8 is located on the drive side of the sheet feeder. This drive initially consists of a stepper motor 11 with a reduction gear, which is fastened to the side wall 22 by means not shown. On its stub shaft 14, two drive cams 12 of the same design are fastened, which are diametrically opposed to one another in such a way that their two cam tracks always have the same distance in the diagonal direction to the axis of rotation of the stepping motor 11. A cam roller 13 runs on each of these drive curves 12: Both cam rollers are fastened to a drive rod 54 via a bearing block 53. Drive curves 12 and cam rollers 13 work together in such a way that the rotational movement of the stub shaft 14 of the stepping motor 11 is transmitted to the drive rod 54 without play.

Die Antriebsstange 54 ist axial verschiebbar gelagert, und zwar einmal in der Führungskonsole 55 und zum anderen in der Maschinenseitenwand 22. Beide Lagerungen bestehen aus Kugelbüchsen 56. Das freie Ende der Antriebsstange 54, das in das Maschineninnere hineinragt, ist mit einem Steuersegment 57 versehen, welches mit Antriebsrollen 58 jeder Saugziehleiste 8 in Eingriff gelangen kann, und zwar derart, daß die axiale Antriebsbewegung der Antriebsstange 54 spielfrei auf die jeweilig anzutreibende Saugziehleiste 8 übertragen wird.The drive rod 54 is axially displaceably mounted, one in the guide bracket 55 and the other in the machine side wall 22. Both bearings consist of ball bushings 56. The free end of the drive rod 54, which projects into the interior of the machine, is provided with a control segment 57, which can come into engagement with drive rollers 58 of each squeegee 8, in such a way that the axial drive movement of the drive rod 54 is transmitted to the squeegee 8 to be driven in each case without play.

Das Steuersegment 57 ist in axialer Richtung der Antriebsstange 54 verschiebbar in einer Ausnehmung einer Rückholscheibe 59 untergebracht. Eine Führung 60 ragt in diese Ausnehmung der Rückholscheibe 59 hinein. In ihr läuft eine Führungsrolle 61. Sie ist drehbar an der Unterseite des Steuersegments 57 angebracht. Führung 60 und Führungsrolle 61 verhindern gemeinsam ein Verdrehen der Antriebsstange 54. Sowohl Führung 60 als auch die Rückholscheibe 59 sind an der Maschinenseitenwand 22 befestigt.The control segment 57 is displaceably accommodated in a recess of a return disk 59 in the axial direction of the drive rod 54. A guide 60 protrudes into this recess of the return disk 59. A guide roller 61 runs in it. It is rotatably attached to the underside of the control segment 57. Guide 60 and guide roller 61 together prevent the drive rod 54 from rotating. Both the guide 60 and the return disk 59 are fastened to the machine side wall 22.

Die Figuren 4 bis 6 zeigen die wesentlichen Arbeitsstellungen des Steuersegments 57. In der Figur 5 steht das Steuersegment 57 in seiner mittleren Nullstellung. Diese Position nimmt es ein, bevor eine Verstellung einer Saugziehleiste 8 vorgenommen werden soll. Wie der Figur 5 zu entnehmen ist, haben die normalerweise von der Rückholscheibe 59 geführten Antriebsrollen 58 einer Saugziehleiste 8, die, wie aus Vorbeschriebenem hervorgeht, mit dem Ausrichtzylinder 20 umläuft, das Steuersegment 57 gerade erreicht. In diesem Augenblick kann der Verstellvorgang der Saugziehleiste 8 beginnen. Befindet sich der Sensor 16 der Positioniereinrichtung auf der Bedienungsseite der Maschine in Tätigkeit, so dreht der Schrittmotor 11 über seinen Wellenstumpf 14 die Antriebskurven 12 derart, daß die Antriebsstange 54 über die Kurvenrollen 13 in Richtung auf die Antriebsseite der bogenverarbeitenden Maschine gezogen wird. Nach Zurücklegung des maximalen Hubes bleibt die Saugziehleiste 8 stehen. Diese Stellung ist in Figur 4 gezeigt. Wird der Schrittmotor 11 hingegen von der Positioniereinrichtung gesteuert, was normalerweise der Fall ist, so hält das Steuersegment 57 vor Erreichung des maximalen Hubes an jeder gewünschten Stelle an. Dabei legt die verstellte Saugziehleiste 8 den jeweils notwendigen Ausrichthub zurück. Ist der Ausrichtvorgang abgeschlossen, so wird der ausgerichtete Bogen 4 von weiterfördernden Mitteln übernommen. Die Rückholscheibe 59 stellt nach diesem Verstellvorgang die Saugziehleiste 8 wieder in die Nullposition.Figures 4 to 6 show the essential working positions of the control segment 57. In Figure 5, the control segment 57 is in its central zero position. It takes up this position before an adjustment of a suction pulling strip 8 is to be carried out. As can be seen in FIG. 5, the drive rollers 58, which are normally guided by the return disk 59, have a suction pull bar 8 which, as can be seen from the above, rotates with the alignment cylinder 20, has just reached the control segment 57. At this moment, the adjustment process of the suction strip 8 can begin. If the sensor 16 of the positioning device on the operating side of the machine is in operation, the stepper motor 11 rotates the drive curves 12 via its shaft end 14 in such a way that the drive rod 54 is pulled via the cam rollers 13 in the direction of the drive side of the sheet-processing machine. After the maximum stroke has been covered, the suction strip 8 stops. This position is shown in Figure 4. If, on the other hand, the stepping motor 11 is controlled by the positioning device, which is normally the case, the control segment 57 stops at any desired point before the maximum stroke is reached. The adjusted suction strip 8 travels the necessary alignment stroke. When the alignment process is complete, the aligned sheet 4 is taken over by funding. After this adjustment process, the return disk 59 returns the suction strip 8 to the zero position.

Befindet sich hingegen der Sensor 16 auf der Antriebsseite in Betrieb, so ist auch der Schrittmotor 11 entsprechend geschaltet. Er bewegt demzufolge während des Ausrichtvorganges die Antriebsstange 54 in das Maschineninnere hinein, und zwar maximal in die Position, die in Figur 6 dargestellt ist. Bei entsprechender positionierung kommt hierbei das Steuersegment 57 natürlich ebenfalls vor dieser Endlage zum Stehen, weil die Saugziehleiste 8 die Soll-Lage des auszurichtenden Bogens erreicht hat. In dieser Stellung hält die Saugziehleiste 8 den ausgerichteten Bogen solange, bis er von dem Vorgreiferzylinder 3 übernommen worden ist. Nach Übergabe des Bogens erfolgt wieder die Rückführung der verstellten Saugziehleiste 8 in die Null-Lage mittels der Rückholscheibe 59.If, on the other hand, the sensor 16 is in operation on the drive side, the stepper motor 11 is also switched accordingly. Accordingly, it moves the drive rod 54 into the interior of the machine during the alignment process, to a maximum of the position shown in FIG. 6. With appropriate positioning, the control segment 57 naturally also comes to a standstill in front of this end position, because the suction strip 8 has reached the desired position of the sheet to be aligned. In this position, the suction strip 8 holds the aligned sheet until it has been taken over by the pre-gripper cylinder 3. After the sheet has been handed over, the adjusted suction strip 8 is returned to the zero position by means of the return disk 59.

Die Funktion der beschriebenen Ausführungsform der Erfindung ist folgende:

  • Die Transportmittel 5 und 25 des Anlegetisches 1 befördern die Bogen 2 der Schuppe geringfügig schneller als die Umfangsgeschwindigkeit des Ausrichtzylinders 20. Aufgrund dieser Geschwindigkeitsdifferenz wird der jeweils vorderste Bogen 4 der Schuppe sicher gegen die in der Warteposition sich bewegende Reihe von Vordermarken 6 angelegt. Zur Sicherstellung dieser Anlage befinden sich die Vordermarkenabdeckungsgreifer 30 in einer derartigen Position, daß die Vorderkante des herangeführten Bogens 4 nicht ausweichen kann, sondern zwangsläufig an
  • die Vordermarken 6 geführt wird. Aufgrund des Vortriebes der Schuppe der Bögen 2 sowie der Transportmittel 5 und 25 des Anlegetisches 1 kommt es zu einer einwandfreien Vorderkantenausrichtung bevor der Ausrichtbereich 26 erreicht ist.
The function of the described embodiment of the invention is as follows:
  • The transport means 5 and 25 of the feed table 1 convey the sheets 2 of the scale slightly faster than the peripheral speed of the aligning cylinder 20. Because of this speed difference, the foremost sheet 4 of the scale is securely placed against the row of front marks 6 moving in the waiting position. To ensure this system, the front mark cover grippers 30 are in a position such that the front edge of the sheet 4 brought in cannot evade, but inevitably
  • the front brands 6 is guided. Due to the advance of the scale of the sheets 2 and the transport means 5 and 25 of the feed table 1, the front edge is correctly aligned before the alignment area 26 is reached.

Nach dieser während ständiger Rotation des Ausrichtzylinders 20 stattfindenden Vorderkantenausrichtung beginnt dann in dem Ausrichtbereich 26 die Seitenkantenausrichtung. Eröffnet wird sie durch ein festes Ansaugen des vorderen Bereichs des auszurichtenden Bogens 4 gegen die Saugfläche 9 der Saugziehleiste 8. Die Saugkraft ist derart, daß zwischen Bogenunterseite und Saugfläche 9 Haftreibung entsteht. Der Bogen 4 ist also nach der Vorderkantenausrichtung unverrutschbar erfaßt worden.After this front edge alignment, which takes place during constant rotation of the alignment cylinder 20, the side edge alignment then begins in the alignment region 26. It is opened by firmly sucking the front area of the sheet 4 to be aligned against the suction surface 9 of the suction strip 8. The suction force is such that static friction is generated between the underside of the sheet and the suction surface 9. The sheet 4 has thus been gripped after the leading edge alignment.

Nach diesem Erfassen des Bogens 4 durch die Saugziehleiste 8 ist letztere in die Stellung gemäß Figur 5 gelangt. Ihre Antriebsrollen 58 haben somit spielfrei Kontakt mit dem Steuersegment 57 erhalten. Über den Schrittmotor 11, den Kurventrieb 12, 13 und die Antriebsstange 54 erfolgt nun eine Bewegung des Steuersegments 57 in Richtung auf die Endstellung gemäß Figur 4. Der Bogen 4 wird also zur Antriebsseite hingezogen. Dabei passiert die bedienungsseitige Bogenkante des transportierten Bogens 4 im Ausrichtbereich 26 den Meßstrahl des Sensors 16, so daß aufgrund des Freiliegens des Abfragespalts 15 der Sensor kein reflektiertes Licht mehr wahrnimmt. Das Fehlen des Lichteinfalls bewirkt im Sensor die Erzeugung eines Impulses, der die Positioniereinrichtung veranlaßt, den Schrittmotor 11 derart zu steuern, daß der Bogen 4 ab diesem Zeitpunkt nur noch eine ganz bestimmte Strecke, beispielsweise zwei Millimeter, zurücklegt. Dann hat er seine seitliche Soll-Lage erreicht.After this detection of the sheet 4 by the suction pull bar 8, the latter has reached the position according to FIG. 5. Your drive rollers 58 have thus received contact with the control segment 57 without play. The stepping motor 11, the cam drive 12, 13 and the drive rod 54 now move the control segment 57 in the direction of the end position according to FIG. 4. The arc 4 is thus drawn toward the drive side. The operator-side sheet edge of the transported sheet 4 passes in the alignment area 26 the measuring beam of the sensor 16, so that the sensor no longer detects reflected light due to the exposure of the interrogation gap 15. The lack of incidence of light causes the sensor to generate a pulse which causes the positioning device to control the stepping motor 11 in such a way that the sheet 4 then only covers a very specific distance, for example two millimeters. Then it has reached its desired lateral position.

Dieser gesamte Seitenausrichtvorgang erfolgt in der Zeit, in der die betätigte Saugziehleiste 8 den Ausrichtbereich 26 passiert. Nach erfolgter Ausrichtung hält die Saugziehleiste 8 den Bogen weiterhin in der ausgerichteten Soll-Lage fest. Unterstützend können dabei noch die Vordermarkenabdeckungsgreifer den Bogen halten, um ein zusätzliches Führen des ausgerichteten Bogens 4 bis zur endgültigen Weitergabe an die Greiferbrücke 27 des Vorgreiferzylinders 3 zu erreichen.This entire side alignment process takes place in the time in which the actuated suction strip 8 passes the alignment area 26. After alignment, the suction strip 8 continues to hold the sheet in the aligned target position. The front mark cover grippers can also support the sheet in order to achieve additional guidance of the aligned sheet 4 until it is finally passed on to the gripper bridge 27 of the pre-gripper cylinder 3.

Hat die Greiferbrücke 27 den ausgerichteten Bogen 4 sicher erfaßt, so erreicht die Luftsteueröffnung 47 des Ventilkörpers 39 derjenigen Saugleiste 8, die gerade mit einem Unterdruck beaufschlagt worden ist, die Frischluftöffnung 45, wodurch aufgrund von Frischluftzufuhr der Unterdruck schlagartig zusammenbricht. Die Haftreibung zwischen der Saugfläche 9 der Saugziehleiste 8 und der Unterseite des Bogens 4 wird aufgehoben. Das Abheben des paßgerechten Bogens 4 durch die Greiferbrücke 27 von der Bogenführungsfläche 37 kann nunmehr erfolgen.If the gripper bridge 27 has securely gripped the aligned sheet 4, the air control opening 47 of the valve body 39 of the suction strip 8 which has just been subjected to a vacuum reaches the fresh air opening 45, as a result of which the vacuum suddenly breaks down due to the supply of fresh air. The static friction between the suction surface 9 of the suction strip 8 and the underside of the sheet 4 is eliminated. The sheet 4, which is in the correct position, can now be lifted off the sheet guiding surface 37 by the gripper bridge 27.

Bevor jedoch die Greiferbrücke 27 den Bogen 4 von der Bogenführungsfläche 37 in Richtung auf den Umfang des Anlegezylinders 3 bewegt, erfolgt ein Verschwenken der Träger 36 mittels der Steuerwelle 31. Dabei läuft die Führungsrolle 34 an der Steuerkurve 35 entlang und bewirkt zunächst ein Abheben der Vordermarkenabdeckungsgreifer 30 von dem Bogen 4 und darauf ein Hineinschwenken der Vordermarkenabdeckungsgreifer 30 in den Ausrichtzylinder 20 hinein. Die Greiferbrücke 27 des Anlegezylinders 3 kann nunmehr den ausgerichteten Bogen 4 von der Mantelfläche des Ausrichtzylinders 20 abnehmen. Die gerade verwendete Saugziehleiste 8 wird während der weiteren Rotation des Ausrichtzylinders 20 in die Nullstellung gemäß Figur 5 zurückbewegt. Bei Erreichen des Anlegetisches 1 ist also jede Saugziehleiste 8 wieder in Bereitschaft. Außerdem werden in dieser Stellung die Vordermarkenabdeckungsgreifer 30 herausgeschwenkt, so daß eine sichere Anlage der Bogenvorderkante des nunmehr auszurichtenden Bogens 4 an den Vordermarken 6 gewährleistet ist.However, before the gripper bridge 27 moves the sheet 4 from the sheet guide surface 37 in the direction of the circumference of the feed cylinder 3, the carrier 36 is pivoted by means of the control shaft 31. The guide roller 34 runs along the control cam 35 and first of all causes the front label cover gripper to be lifted off 30 from the sheet 4 and then swiveling the front mark cover grippers 30 into the alignment cylinder 20. The gripper bridge 27 of the feed cylinder 3 can now remove the aligned sheet 4 from the lateral surface of the alignment cylinder 20. The suction strip 8 just used is moved back into the zero position according to FIG. 5 during the further rotation of the alignment cylinder 20. When the feed table 1 is reached, each suction strip 8 is again in readiness. In addition, the front mark cover grippers 30 are pivoted out in this position, so that a secure contact of the leading edge of the sheet 4 now to be aligned with the front marks 6 is ensured.

Claims (12)

1. Device for the stream-feeding of sheets (4) to be fed overlappingly staggered relative to one another via a feed table (1) to an alignment device and, after aligning, to be delivered to a sheet processing machine (50), whereby the front edge alignment is carried out by an aligning cylinder (20) which is moved in synchronism with said sheet processing machine, said aligning cylinder having front lays (6) and a suction-pull bar (8) mounted in front of said front lays which is positionable in axial direction and functions as a gripping means whereby said sheets, during alignment, maintain their movement towards said processing machine, wherein in said aligning cylinder (20) there are disposed at least two rows of front lays (6), evenly distributed about its circumference, and above said aligning cylinder (20) there are provided sensors (16) belonging to a positioning device, which scan the side edge of the sheet passing by in the aligning region (26), whereby said positioning device controls said suction-pull bar (8) such that the sheet abutting to the front lays (6) is shifted to the required lateral position while being sucked in tightly by said suction-pull bar (8) and is held there until it is taken over in register by further transporting elements (3)
2. Device according to Claim 1, wherein to each row of front lays (6) in said aligning cylinder (20) there are assigned swivelable front lay cover grippers (30) which lead the sheet front edge in the region of said front lays (6) and which also can be utilized for holding said sheet front edge.
3. Device according to Claim 1 or 2, wherein a drive for said suction-pull bar (8) is positioned on the one side of said machine at its side wall (22).
4. Device according to Claim 3, wherein an air control for said suction-pull bar (8) is arranged on the other side of said machine at its side wall (21).
5. Device according to Claim 4, wherein said air control consists of a valve ring (42) positioned at said machine side wall (21) and of a valve body (39) revolving with the shaft (23) of said aligning cylinder (20).
6. Device according to Claim 5, wherein in the control face (43) of said valve ring (42) there are provided a suction opening (44) and a fresh air opening (45) at the same radial height, wherein equally distributed over the control face (46) of said valve body (39) there is provided an air control opening (47) for each suction-pull bar (8) at the same radial height as said openings (44, 45) of said valve ring (42), and wherein said suction-and fresh air openings (44, 45) are spaced apart approximately as much as the measure of width of said air control opening (47).
7. Device according to Claim 4, wherein said drive has a stepping motor (11) which is arranged at the outside of said machine side wall (22), and wherein said stepping motor (11) is coupled, without play, with a drive rod (54) via a cam drive (12, 13), said drive rod (54) being axially displaceably mounted in two spherical bushes (56) and, at its end face on the inside of said machine side wall (22), being provided with a control segment (57) which is connectable form-locking with each of said suction-pull bars (8) of said aligning cylinder (20) via two drive rollers (58).
8. Device according to Claim 7, wherein said control segment (57) is displaceably housed in a recess of a return disc (59) fastened to the inside surface of said machine side wall (22).
9. Device according to Claim 7, wherein said control segment (57) is secured against turning by a stationary guide (60) via a guide roller (61).
10. Device according to Claim 7, wherein at each of two bearing blocks (53) said drive rod (54) has a respective cam roller (13) being in operative engagement with an assigned respective drive cam (12) mounted on a shaft stub (14) of said stepping motor (11), whereby both said drive cams (12) are disposed and designed in relation to the axis of rotation of said stepping motor such that the spacing between both cam paths is constant in each diagonal direction.
11. Device according to any one or more of the preceding claims, wherein the drive of said suction-pull bar (8) is convertible for left-hand or right-hand alignment of a sheet.
12. Device according to any one or more of the preceding claims, wherein the aligning cylinder (20) is designed to simultaneously function as a pregripping cylinder provided with at least a front; edge and side edge alignment device and with means for being cyclically non-uniformly driven.
EP84102303A 1983-03-26 1984-03-03 Apparatus for the uninterrupted positioning of sheets Expired EP0120348B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833311196 DE3311196A1 (en) 1983-03-26 1983-03-26 METHOD FOR THE FLOWING SYSTEM OF BOWS
DE3311196 1983-03-26

Publications (3)

Publication Number Publication Date
EP0120348A2 EP0120348A2 (en) 1984-10-03
EP0120348A3 EP0120348A3 (en) 1986-04-23
EP0120348B1 true EP0120348B1 (en) 1988-09-28

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EP84102303A Expired EP0120348B1 (en) 1983-03-26 1984-03-03 Apparatus for the uninterrupted positioning of sheets

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US (1) US4588184A (en)
EP (1) EP0120348B1 (en)
JP (1) JPS59179348A (en)
AU (1) AU565405B2 (en)
BR (1) BR8401361A (en)
CA (1) CA1207347A (en)
DE (2) DE3311196A1 (en)
DK (1) DK66884A (en)
ES (2) ES8500133A1 (en)
GB (1) GB2136777B (en)
NO (1) NO158612C (en)
ZA (1) ZA84836B (en)

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DE102017012276B4 (en) 2017-11-27 2019-06-06 Koenig & Bauer Ag Sheet processing machine
DE102017221215B4 (en) 2017-11-27 2023-04-06 Koenig & Bauer Ag sheet processing machine
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DE102017221216B4 (en) 2017-11-27 2019-06-27 Koenig & Bauer Ag Sheet processing machine
DE102020107837B4 (en) 2020-03-23 2023-07-06 Koenig & Bauer Ag Sheet processing machine with a sheet separator
DE102020107838B4 (en) 2020-03-23 2023-05-11 Koenig & Bauer Ag Sheet processing machine with a sheet separator
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DE102009008781A1 (en) 2008-03-17 2009-09-24 Heidelberger Druckmaschinen Ag Device for aligning sheets by means of stops arranged on a cylinder
DE102009008781B4 (en) 2008-03-17 2022-05-12 Heidelberger Druckmaschinen Ag Device for aligning sheets by means of stops arranged on a cylinder

Also Published As

Publication number Publication date
GB2136777A (en) 1984-09-26
CA1207347A (en) 1986-07-08
AU2500384A (en) 1984-09-27
EP0120348A2 (en) 1984-10-03
NO841150L (en) 1984-09-27
BR8401361A (en) 1984-10-30
DK66884D0 (en) 1984-02-14
NO158612B (en) 1988-07-04
ES530881A0 (en) 1984-11-01
JPS59179348A (en) 1984-10-11
ZA84836B (en) 1984-09-26
AU565405B2 (en) 1987-09-17
GB2136777B (en) 1986-08-13
NO158612C (en) 1988-10-12
ES8500134A1 (en) 1984-11-01
JPH0437784B2 (en) 1992-06-22
DE3311196A1 (en) 1984-10-04
ES530880A0 (en) 1984-11-01
DK66884A (en) 1984-09-27
DE3474287D1 (en) 1988-11-03
US4588184A (en) 1986-05-13
ES8500133A1 (en) 1984-11-01
EP0120348A3 (en) 1986-04-23
DE3311196C2 (en) 1987-07-16
GB8406537D0 (en) 1984-04-18

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