EP3463888A1

EP3463888A1 - Leading edge orientation in a feeding unit

Info

Publication number: EP3463888A1
Application number: EP17726268.0A
Authority: EP
Inventors: Harald Bayer
Original assignee: Manroland Sheetfed GmbH
Current assignee: Manroland Sheetfed GmbH
Priority date: 2016-05-25
Filing date: 2017-05-24
Publication date: 2019-04-10
Anticipated expiration: 2037-05-24
Also published as: EP3463888B1; WO2017202926A1; DE102017111311A1

Abstract

A feeding unit for a sheet-fed rotary printing press comprises one or more printing units (D1, D2) and/or inking modules. Said printing unit/s and/or inking module/s is/are fitted with a substructure consisting of double-size transfer drums (4) and impression cylinders (5). The feeding unit is provided with a sheet feeder (1), a conveying unit and a feeding table (2) and includes a single-size or double-size feeding drum (3.2) which is associated with a sheet-guiding drum of a first printing unit (D1) of the sheet-fed rotary printing press. In order to improve handling, the conveying unit is designed as an endless conveyor system (11) that connects the lower feeding drum (3.2) to an upper feeding drum (3.1). A conveyor system (11) that is placed between the upper and lower feeding drums (3.1, 3.2) includes gripper systems (8) and can be controlled in such a way as to compensate for sheet movements in the direction of travel (R).

Description

manroland sheetfed GmbH

The invention relates to a placement unit for a sheet-fed printing press according to the preamble of claim 1.

Docking units for singling and targeted tactual feeding of sheets to a working process are known in the context of sheet-fed rotary printing presses. Sheet conveying takes place via impression cylinders and transfer drums. The printing process operates e.g. after the flexo or offset printing process. Also known are sheet coating machines such as painting machines.

On known sheet-fed printing machines, the application and alignment of the printed matter is carried out in equipment for sheet-fed equipment, the sheets separated from a pile of sheets are fed as a shingled stream via a belt table. The scale flow of the printed sheets can be conveyed by means of suction belts via a suction belt table. A sheet system usually has side marks that can work with pneumatic conveyors, and there are front and top brands provided. Finally, these alignment means are usually provided with a format adjustment. The sheetfed also includes sensory devices for controlling the position of leading edges, side edges, skew or multiple layers of the signatures. With the help of sensory devices, system barriers act to block printed sheets in the event of inaccuracies in sheet transport. Subordinate to the sheet system are oscillating pregrippers, which interact with rotating transfer drums. The substrate undergoes abrupt changes of direction on its conveying path and undergoes considerable delays and accelerations. From DE 43 43 616 A1 a landing unit in a modular printing machine system is known which combines a printing unit with the printing cylinder of a printing unit. acting first double-sized investment drum with circumferentially two gripper systems. This is a second single-sized plant drum in the sheet conveying direction arranged vertically offset in height. A third, single-size feed drum precedes the second in height and is connected to a tilted feed table for sheet transfer. The sheet acceleration system on the high pile feeder is used to process cardboard, while the press is suitable for cardboard and paper. For paper processing, a normal feeder is used, which has to be exchanged completely for a high-pile feeder during carton processing. The application unit is very expensive due to the large number of drums. Due to the many sheet transfers and curvature of the drums, the sheet run is adversely affected. Particularly disadvantageous is the replacement of the aggregates when using a high-pile feeder.

In bowing systems and rotary pre-gripper as in DE-AS 2 063 618 are known. This sheet feeder shows a rotating pregripper drum inclined in the conveying direction upstream feed table. The pre-gripper drum has two diametrically arranged gripper systems that can dive into the drum body. In one variant, the sheet feed takes place with a transfer drum connected between the pregripper drum and a printing cylinder. In a second variant, the pre-gripper drum is directly associated with a printing cylinder. Front lays are pivotally integrated in the feed table from below.

From DE 27 18 314 A1, a rotating pregripper with two gripper systems is known, upstream of which is a delivery table in the conveying direction, and a downstream conditioning drum is arranged downstream of it. The pre-gripper rotates at half the speed of the feed drum. The gripper systems perform on the pre-gripper a swinging motion about the pre-gripper axis or about a shaft mounted eccentrically to the pre-gripper axis. A partial circumference of the pre-gripper drum protrudes beyond the level of the feed table, which is unfavorable for the bowing.

From DE 10 2005 012 527 A1 a placement unit for a sheet processing machine in a sheet processing machine with a method for Creating sheet known, which is designed for attachment to a sheet processing plant. It shows a feed table and arranged at the printing unit side end of the feed table gripper system. The gripper system feeds each sheet directly to a transfer cylinder of the sheet processing plant.

DE 199 33 304 A1 discloses a laying unit for a sheet-processing machine. An investment drum, a feed table and an investor are combined in one module. The axis of the double-sized investment drum of a horizontal plane formed by the axes of all printing cylinders. Gripper systems pivotally mounted on the abutment drum consist of a gripper shaft, grippers arranged on the gripper shaft and gripper loading strips and front marks arranged thereon.

Known partial solutions for clocked sheet fed sheetfed presses are usually outdated and are not rising demands on quality, performance, cost and availability. It is particularly desirable that printed sheets are not subjected to multiple acceleration and deceleration processes and additionally required changes of direction in the transport of substrate. The Greiferschi uss adapted for the transport of each sheet to the working cycle of the sheet-fed printing machine for detecting the sheet leading edge should be able to be produced as far as possible in the vicinity of the sheet feeder. The often faulty or known as particularly prone to error scaly sheet transport should, if possible, be omitted.

The effort to supply air to suction belt tables for fans, a multi-chamber design and an oblique arc correction via suction belts should be eliminated. The orientation of the sheet should be done in the conveying movement during transport from the sheet separation in the sheet feeder serving suction head to a counter-pressure cylinder in the first printing unit of the sheet-fed press. This would considerably more time to align the sheets before the first printing unit of the sheet-fed press available. The invention has for its object to provide a placement unit for a sheet processing machine of the type described above, which avoids the disadvantages mentioned above, which in particular allows a simple modular structure and allows improved bowing of the sheet with extended Ausricht- time.

According to the invention the object is achieved with the features of claim 1. Advantageous developments emerge from the subclaims. The invention relates to a placement unit for a sheet-fed rotary printing press with one or more printing units and / or paint modules, which are equipped with a substructure of each double-sized transfer drums and counter-pressure cylinders. The application unit is provided with a sheet feeder, a conveyor unit and a feed table, which can have a single or double-sized feed drum, which is assigned to a sheet-guiding drum of a first printing unit of the sheet-fed rotary printing press. According to the invention, the conveying unit is designed as an endless conveyor system connecting the lower bearing drum to an upper bearing drum, the upper bearing drum being associated with the sheet feeder. Means are provided for adjusting the endless conveyor system circumferentially relative to the upper and / or lower abutment drum.

It can advantageously be provided that the upper abutment drum is assigned to a feed table and that the feed table is assigned to the sheet feeder, wherein the sheet transfer to the upper abutment drum is adjustable to different positions of the sheet in the conveying direction.

Advantageously, it can be provided that the lower abutment drum is associated with a counter-pressure cylinder of the first printing unit of the sheet-fed rotary printing press and that the sheet transfer from the lower abutment drum to the gendruckzylinder is adjustable to different positions of the sheet in the conveying direction.

It can advantageously be provided that the conveyor system is designed as an endless chain conveyor with a plurality of gripper systems, wherein the gripper systems extend between two conveyor chains running in mutually parallel guide rails. The guide rails form a closed guideway including the lower drum and the upper drum. In the region of the part of the conveyor system running in the conveying direction, means are provided for displacing the gripper systems on the conveyor chains in or against the conveying direction.

Advantageously, it can be provided that, in conjunction with the upper abutment drum and / or the lower abutment drum, means are provided for the adjustable attachment of catching forks engaging in the gripper systems.

Advantageously, it can be provided that in the region of the upper abutment drum and / or the lower abutment drum means are provided for the adjustable transverse displacement of the conveyor chains from the continuously extending guide track within the guide rails.

Advantageously, it can be provided that in the region of the conveyor system which leads from the upper feed drum to the lower feed drum, means are provided for each autonomous drive of each of the conveyor chains with the associated gripper systems within their respective guide rails. The conveyor chains are synchronously and jointly with respect to cooperating devices before or after or driven asynchronously with kurzeitiger leading or lag each one of the conveyor chains relative to the other. It can advantageously be provided that, for the position detection, the printed sheet to be fed to the sheet-fed rotary printing press is arranged at the upper and / or lower side of the sheet. ren conditioning drum and / or on the conveyor system one or more measuring systems are associated with sheet position sensors adjacent. The measuring systems are coupled to an evaluation unit and a controller. The controller is operatively connected to an actuator acting on the conveyor system for position correction of gripper systems.

Advantageously, it can be provided that, for detecting the position of the sheet-fed rotary printing press to be supplied sheet of the upper and / or lower abutment drum and / or the conveyor system one or more measuring systems with sheet genagen sensors is associated adjacent, which are coupled to an evaluation and a controller, said Control is operatively connected to an acting on the conveyor system actuator for position correction of gripper systems. Advantageously, it can be provided that the conveyor system and / or the suction head of the sheet feeder are each provided with an independent motor drive. The motor drives are coupled by means of the controller so with the machine control of the sheet-fed rotary printing press, that the conveyed from the conveyor system sheet in its position in the conveying direction with respect to the machine cycle of the sheet-fed rotary printing press accurately aligned for rotational movement of the sheet-fed rotary printing press.

Advantageously, it can be provided that the upper and / or lower bearing drum are provided with one or two independent motor drives. The motor or drives are coupled by means of the controller with the machine control of the sheet-fed rotary printing press.

Advantageously, it can be provided that one or both conveyor chains of the conveyor system are each provided with an independent motor drive. The motor drives are coupled by means of the control with the machine control of the rotary press. Another advantage is that the machine speed can be increased bar, since the plant drum are always rotating in the conveying direction and the time required for conventional swinging systems for the swing back is not needed. In this case, there are no edge changes to the drive systems, which supports the smooth running of the machine. Retroactive moments on the drive wheel train are noticeably reduced and the drive itself is simpler.

Another advantage is based on the improvement of bowing. Due to the inclined or preferably horizontal design of the feed table in conjunction with the feed drum arranged for the feed drum is bent by the relatively large drum diameter of the sheet less than, for example, in a simple-sized investment drum. The application unit is thus universal for the processing of relatively thin printed sheets as well as thick sheets, such as e.g. Cardboard or sheet metal, regardless of the elasticity of the sheet used.

The arrangement of the upper abutment drum on one or offset in height above a horizontal plane formed by the axes of all counter-pressure cylinders allows for a horizontally arranged feed table at the level of the stacking surface, the formation of a Hochstapelanlegers. A complex replacement of a normal stack feeder against a high pile feeder is obsolete.

It is also advantageous that in a horizontally arranged feed the isolated from the sheet feeder sheet are fed directly into a horizontal conveying plane of the upper bearing drum and can be created in the gripper systems of integrated front brands there. This avoids possible damage to the printed sheet, which can occur, for example, at the transition from the sheet feeder to the feed table. The feed table is preferably formed flat surface and provided with longitudinal openings into which open at the inlet to the upper drum conditioning gripper Submerge ferfinger of the gripper systems of the conveyor system. In the case of a horizontal arrangement of the conveyor table, it is advantageous that the separated printed sheets fed from the sheet stack reach their alignment marks on a greatly shortened conveying path and can be accelerated immediately to full speed. Thus, the length of the feed table can be shortened and, for example, a stopper is less waste.

The structural design of the solution according to the invention has a parallel guide on the contact plate between the gripper systems and the pressure sheet pushed by the suction head as a contact area corresponding to a conventional contact sheet in the sheet feeder.

The printed sheets can be retained in the sheet feeder by means of an attachment lock. As a result, less or no waste accumulates due to printed sheets, which remain in the known manner with stoppers on the belt table and must be cleared away, making them useless.

The orientation of the sheet can be done during transport between the feeder stack and the first printing unit. Axial, i. transverse to the paper direction of the so-called side registration is adjusted by page orientation. The orientation with respect to the slant arc and the position of the leading edge is controlled by the forward movement of the gripper systems.

A sensor system with sheet-fed control sensors in the course of the conveyor system is connected to a closed control loop and ensures that early, late, double and oblique sheets are already recognized on the contact sheet and thus excluded from the transfer to the sheet transport by means of the conveyor system ,

Also possible is a single drive of the sheet feeder, so that then an inline orientation of the early / late bow could be omitted, since the forward movement of the separated sheet can be influenced by means of the single drive. Previously used in the investment technique alignment techniques in the paper direction are primarily adjustable front marks and to prevent arch over- Shooters use top brands. These make a large mechanical control effort necessary and can cause, due to the pivoting movements, scratches on the incoming sheet. Fixed marks also mark the leading edge of the sheet and require a slowdown of the printed matter, which requires an additional gearbox. The bow is stopped by the stopper construction. Substrate thicknesses must be set. The bows must be held by suction rollers at the front. The above facilities are completely eliminated. The orientation of the printing material is carried out in the conveying process during transport from the suction head to the impression cylinder. When resting, aligned in the front edge bow as currently performed as standard, the sheet is then pulled laterally against a stop. There is a risk of slipping. There are stoppers and therefore waste, which is minimized by the invention. In some cases, the system can not be locked in time and the bow comes in. This can happen until the machine breaks and the rubber blankets are destroyed. This is avoided by the invention. The sheets are aligned during transport between the suction head and the impression cylinder of the first printing unit by an adjusting device. This can be a fork in the alignment cylinder, which aligns the transport system in the scope and also corrects skew. The gripper systems are conveyed through an endless chain, for example, and each must be designed to be alignable. This is possible axially by means of floating suspension, but an inclined blade orientation or an alignment in the circumference necessitates a decoupling of the transport system from the drive chains.

Variant 1: The chain is not, as usual, driven by a sprocket on the cylinder axis, but by two separate chain drives each on one side. The basic task of these drives is the transport of the transport systems and the printing material. By accelerating or slowing down both Drives, the leading edge can be passed to the impression cylinder sooner or later. During acceleration or deceleration on only one side, skew bends can be corrected. Variant 2: The systems are aligned or corrected by means of fishing forks, which are equally adjustable on both sides of the substrate in the paper direction and one-sided adjustable bevel. The chain strand is closed. In order for the acquisition of the sheet, the orientation and the transfer do not influence each other, the length of the chain from one to the other transport system must be variable. This is solved by a springing that allows different distances of the gripper systems, which can then be controlled before each alignment station. The system is always pre-aligned in the upper drum. The necessary actuators can be performed electrically, pneumatically or hydraulically, etc. A pre-alignment of the transport system can already take place with regard to the sheet that is still on the stack, the systems are preset and take over the substrate, even in a (pre-) corrected position, in the upper investment drum. For substrates that are already outside of a correction corridor, the system can be locked here as desired. The sheet position sensors, which can be manually or automatically adjusted to the substrate format, detect the leading edge of the substrate after being transferred to the transport system on the contact sheet. The actuators (motors, catch forks) align the bow on the way to the lower feed drum or in the feed drum. The very short time known Vordermarkenaus- directions is considerably extended by this solution. So that the transport system is no longer adjusted after the alignment, a fastening (clamping) is provided.

Furthermore, a discharge of Schlechtbogen during transport and an auto-non-stop sheet feed are conceivable. The invention will be explained in more detail using an exemplary embodiment. Showing: 1 a sheet feeder with a sheet feeding unit for a sheet-fed printing machine in a side elevation,

2 is a laying unit according to Fig. 1 in plan view,

3 shows a laying unit in functional connection with a guide element for lateral alignment,

4 shows a laying unit in functional connection with two guide elements for circumferential orientation,

5 a landing unit according to FIG. 4 with a circumferential alignment, FIG.

Fig. 6 shows a landing unit with a further circumferential orientation and

7 shows a landing unit with a motor-driven peripheral-related

Orientation.

A sheet-fed rotary printing press (offset printing press) according to FIG. 1 has one or more printing units D1, D2 and / or lacquer modules. The printing units D1, D2 upstream of a laying unit 19 is associated with an endlessly circulating conveyor system 1 1 in the conveying direction R. Each printing unit D1, D2 has a transfer drum 4 and a downstream in the conveying direction R impression cylinder 5 for the sheet transport. Each impression cylinder 5 is assigned a blanket cylinder 7 and a forme cylinder 6.

In each printing unit D1, D2, the impression cylinders 5 and transfer drums 4 are of double size starting from single-size blanket 7 and forme cylinder 6 and each have two rows of grippers 22 for sheet transport. The application unit 19 consists of a sheet feeder 1, a feed table 2 and single or double-sized upper and lower installation drums 3.1, 3.2. The upper bearing drum 3.1 and the lower bearing drum 3.2 are connected by a two endless conveyor chains 23 exhibiting conveyor system 1 1 with each other. In the exemplary embodiment, the conveyor system 11 has five gripper systems 8 which circulate on the conveyor chains in guide rails 12. The gripper system 8 are bar-shaped extending transversely to the conveying direction R between the conveyor chains 23 extending beam elements, which have a series of grippers 9 for transporting sheet B at the sheet leading edge.

The feed table 2 is arranged directly following an upper edge of a sheet stack 14 held in the sheet feeder 1 in the direction of conveyance R and aligned substantially horizontally. The feed table 2 is assigned to the surface of the sheet stack 14 upstream of a suction head 13, by means of which the uppermost sheet is separated from the sheet stack 14 and advanced by suckers 13.1 towards the feed tray 2 until it reaches a takeover distance Ü for gripping the sheet leading edge by the gripper systems 8 ,

Above the feed table 2, the upper bearing drum 3.1 is arranged. About the plant drum 3.1 guided to endless conveyor chains 23 gripper systems 8 are guided by the conveyor system 1 1 on guide rails 12 in the area of sheet transfer parallel to the feed table 2 via a takeover Ü. The separated printing sheet B is thus taken over by the gripper systems 8 with grippers 9 open on the feed table 2 after the sheet leading edge has been introduced into the gripper 9 by the suction head 13 and the sheet B has then been gripped at the sheet leading edge. Thereafter, it can be removed from the feed table 2.

Below the feed table 2, a device with one or more sheet position sensors 20.1 is arranged. By means of the sheet position sensors 20, the position of the sheet leading edge of just separated from the sheet stack 14 and taken over by the gripper system 8 with the grippers 9 sheet B is detected and evaluated in terms of its position with respect to the machine cycle and the position with respect to the orientation during transport in the conveying direction R.

Below the conveyor system 1 1, a sheet guiding device 21 is arranged approximately parallel to the downwardly leading floor transport path. By means of the sheet guide device 21, each individual sheet B is separated by a gripper. led fersystem 8 of the upper bearing drum 3.1 to the lower feed drum 3.2, where it is transferred to the impression cylinder 5 of the first printing unit D1. In the area of the sheet guiding device 21, further sheet position sensors 20 can be arranged in order to monitor the position of the sheet edges in the gripper system 8 in the conveying direction R and transversely thereto in the direction of the side edges of the printed sheets B.

The data resulting from the measurement of the position of the printed sheets B are used to adjust the sheet position with respect to the processing clock and the page orientation of each individual sheet B.

Accordingly, in one embodiment, a measuring system with a few sheet position sensors 20 is arranged on or below the feed table 2, which detects the actual position of a front and / or side edge of the printed sheet B on the feed table 2. In a controller 24 hereby a target-actual comparison is made. By means of side pulling and / or leading edge alignment of the sheet B can then be controlled in a desired position for acquisition by the gripper 9 on or in conjunction with the gripper systems 8 are aligned.

In a preferred embodiment gem. 1, the feed table 2 is arranged horizontally so that the sheet-shaped printed sheet B separated by the suction head 13 on the sheet stack 14 in the sheet feeder 1 can be detected in the transfer section Ü in the area of the feed table 2. This takes place in a continuously largely horizontal conveying plane through the suckers 13.1 of the suction head 13, which introduce the separated printed sheet B into the gripper 9 open at the bottom of the feed table 2 on the gripper system 8. The assignment to the gripper systems 8 via arranged in conjunction with the grippers 9 in the gripper systems 8 and not shown here front edge stops, against which the sheets B are created by the pushing movement of the suction head 13 before the grippers 9 may be closed. The Anlagetronnnnel 3.1 is disposed within the application unit 19 above the feed table 2 such that the horizontal conveying plane of the feed table 2 tangentially to the corresponding gripper system 9, which enters via the contact drum 3.1 runs. The installation drums 3.1 and 3.2 may, based on the single-size form cylinder 6, be either single or double sized. This can be selected depending on the space requirements and the demands on materials to be processed.

At least the lower conditioning drum 3.2 can be designed as a double-sized drum for the simultaneous recording of two gripper systems 8. It then has a favorable for the guidance of stiffer materials for printing larger diameter, so that the sheet to be transported B not so strong bent and thus can be easily passed to the impression cylinder 5 of the first printing unit D1.

The upper bearing drum 3.1 does not have this problem because the printed sheets B are always taken there only after expiration of the gripper systems 8 of the plant drum 3.1 in the grippers 9 of the gripper systems 8.

In a further development, the lower abutment drum 3.2 and the sheet guiding device 21 is a measuring system with at least one sheet position sensor 20 each, for position detection (actual value) of the gripper systems 8 from the upper abutment drum

3.1 from above the sheet guiding device 21 and at the lower conditioning drum

3.2 led sheet B adjacent assigned. The position detection can refer to side edges and the leading edge of the sheet B. The sheet-fed sensors 20 are circuit-coupled with an evaluation unit for the nominal-actual comparison and a control such that the gripper systems 8 are laterally movable transversely to the conveying direction R in a design.

In a further embodiment, the functional connection of sheet position sensors 20, evaluation unit and control is such that a lateral movement of the gripper system 8 realized and / or in an inclined position of the sheet B to the conveying direction R its positional displacement recognizable and the sheet B through that in or against the conveying direction R obliquely adjustable gripper system 8 can be aligned in the desired position.

The sheet feed sensors 20 assigned to the feed table 2 and / or the sheet guiding device 21 and / or the feed tunnel 3.1 and 3.2 can be used together or individually.

The conditioning drum 3.2 is arranged in the embodiment of FIG. 1 directly upstream of the impression cylinder 5 of the first printing unit D1. Each downstream printing unit D2 or any other processing unit is then formed by a double-sized transfer drum 4 and a double-sized impression cylinder 5 each.

The operation of the application unit 19 is as follows:

In the sheet feeder 1, a sheet-shaped printed sheet B is separated by means of the suction head 14 from the top of the sheet stack 13 in the machine cycle and continuously accelerated in the conveying direction R to machine speed. In the forward movement of the sheet is fed to the feed table 2 and in this case preferably already examined in terms of its location and on double bow or Bogenbe- damages out.

When entering the sheet on the feed table 2, an alignment of the sheet-shaped printing sheet B after a side edge can be carried out after preferred metrological detection of the actual value and a target-actual comparison.

Immediately thereafter or in motion superimposition, the transport takes place in the conveying direction R against leading marks on the gripper system 9 which runs ahead with open grippers 9. The grippers 9 then grasp the printed sheet B when the leading marks abut against the sheet leading edge and the gripper fingers 9 act , while the sheet edge abuts the front marks, at the same time as so-called cover marks until the sheet B is fixed in the gripper closure on the gripper system 8. This process with the detection of the position of the leading edge of the sheet B takes place during a synchronous movement between Sheet B and gripper system 8 parallel to each other at the feed table 2 in the transfer line Ü.

The expired by the rotating bearing drum 3.1 gripper system 8 is moved further on the conveyor system 1 1 in guide rails 12 and pulls the fixed in the gripper circuit arcuate sheet B from the feed table 2 and transports this, while the plant drum 3.1 is constantly moved at machine speed, in the conveying direction R. via the sheet guiding device 21. The sheet guide device 21 may be formed as a simple smooth or contoured guide surface over which the sheet B is towed. The sheet guiding device 21 may also be formed as a pneumatically actuated guide surface over which the sheet B is dragged under the influence of compressed air floating or taut under the influence of suction air. In the area of the sheet guiding device 21, a further or initial metrological detection of the printed sheets B can take place with evaluation of the position and corresponding correction on the conditioning drum 3. Subsequently, the printing sheet B is transferred from the conditioning drum 3.2 in the transfer area to the count of the first printing unit D1 impression cylinder 5. Of the counter-pressure cylinder 5 of the first printing unit D1, the printing sheet B is then transferred to the subsequent impression cylinder 5 after the first printing on the transfer drum 4 of the second printing unit D2 and in a known manner.

If the conditioning drum 3.2 is designed as a double-sized drum, its drum body can be taken over by a delivery drum at the end of the sheet-fed offset printing press. At the first printing unit D1 a corresponding storage position for the standard attachment of a transfer drum 4 is already provided, in which the delivery drum is used. The jib drum is also intended to accommodate endless chain conveyor systems. In Fig. 2, the application unit 19 is shown in a plan view. At the sheet feeder 1 with sheet stack 14 and suction head 13, the upper bearing drum 3.1 connects. At the suction head 13 is an arrow view (see also Fig. 1) shown to illustrate the movements in the sheet separation. The investment drum 3.1 covers here the feed table 2 largely, so that this is highlighted as in Fig. 1 in a dashed representation.

Above the upper bearing drum 3.1 and the lower bearing drum gripper systems 8.1 and 8.3 are shown, which is idle running against the conveying direction R on the way back to the sheet feeder 1.

Starting from the upper bearing drum 3.1, a further gripper system 8.2 is shown in the conveying direction R, which now holds a printed sheet B and transports it in the conveying direction R to the conditioning drum 3.2.

In this connection, two arcuate arrows are shown transversely to the gripper system 8 and an elongated arrow is shown parallel to its extension.

These arrows indicate that the printed sheet B can be aligned by means of the gripper system 8.2 both transversely to the conveying direction R, ie with respect to its side edges, as well as with respect to a pivoting of its leading edge to the conveying direction. During the sheet transport, the sheet alignment can take place between the contact drum 3.1 to the contact drum 3.2, in the course of the sheet transfer to the contact drum 3.1 or in the course of the sheet transfer from the contact drum 3.2 to the impression cylinder 5.

In FIGS. 3 and 4, possibilities for sheet alignment in connection with gripper systems 8 are shown. The gripper systems 8 are here associated with guide rails 12 (see also FIG. 2), wherein the gripper systems 8 are moved on conveyor chains 23 by means of guide rollers 10 in the guide rails 12.

FIG. 3 shows an alignment element 15, which is supported by a break-away point which can be positioned axially against a holding point which can be positioned at an upper or lower abutment drum 3.1, 3.2 when the gripper system 8 enters into an abutment. Richtöffnung 16 engages. In this case, the gripper system 8 is guided between the guide rollers 10 and the guide surfaces in the guide opening 16 in a preselected lateral positioning before and while a sheet B is picked up by the grippers 9 on the gripper system 8 and fixed or transferred in a fixed position to a counter-pressure cylinder 5 , Thus, the sheet B can be aligned on investment drums 3.1 or 3.2 axially, ie transversely to the conveying direction R in the direction of the sheet side edges.

4, by means of two catch forks 17, which cooperate with alignment bolts 18 mounted in the gripper system, a circumferential or oblique orientation of the print sheet B in the direction of the sheet leading edge takes place. In this case, the catch forks 17 engage from drummelfesten and circumferentially related to an investment drum 3.1 or 3.2 adjustable breakpoints in the guide pin 18 on the gripper systems 8 a. Thus, the gripper system is positioned in the conveying direction R, so that the printed sheet B held in the grippers is also positioned.

Depending on sheet position measurements on the sheet position sensors 20, positioning of the alignment member 15 and catch forks 17 during sheet travel can be done to ensure accurate sheet transfer for the best possible production accuracy.

5, in an illustration according to FIG. 2, a variant according to the invention, each having a single drive motor 30, 31, each accessing one of the conveyor chains 23 and thus driving them independently of one another. Thus, the hinged to the conveyor chains 23 gripper systems 8 can be adjusted in their orientation with respect to the position of the suspension points on the conveyor chains 23 relative to each other. Furthermore, the positions relative to the counter-pressure cylinder 5 can also be set at the transfer position at the lower abutment drum 3.2. The upper transfer position after the upper abutment drum in the transfer line Ü is also controllable. In addition, the suction head 13 even be adjusted by means of a self-propelled drive 26 to a transfer position after the upper bearing drum 3.1.

Thus, a correction of oblique bow, as well as of early and late bow within the alignment distance A readily possible without an interruption of the machine run would be necessary.

In Fig. 6, two further approaches are shown in a representation of FIG. 3 and 4 in combination.

In the region of the deflection of the guide track 12 for the gripper systems 8, a recess 32 is provided in the guideways 12. In the region of the recess 32 is on the inside of the conveyor chains 22, 23 each one supporting this tension roller 33 is provided. The tension rollers 33 are moved in the direction of a positioning movement S against the conveyor chains 22, 23. In this case, a shortening of the conveyor chains 22, 23 with a retraction of the corresponding side of the gripper systems 8 is effected by a movement in the direction of the outside of the deflection. The retraction of the tension roller 33 causes a release of the conveyor chains 22, 23 and a feed of the gripper systems eighth

At the end of the conveyor system 1 1 in the region of the deflection of the conveyor chains 22, 23 one of the drums 3.1, 3.2 is provided. This is shown in FIG. 6 merely by means of two guide disks 34, which may be formed as chain wheels or sprockets of the drum. The guide discs 34 are thus part of the bearing drum 3.1 or 3.2 and wear on the outer periphery catch forks (see Fig. 4). The guide disks 34 are adjustably mounted on a shaft 35 of the bearing drum 3.1 or 3.2, so that the catch forks 17 can be adjusted in the circumferential direction to the bearing drum 3.1 or 3.2 together or to each other.

With the means shown is based on the two solutions of Fig. 6 turn a shift and adjustment of the movement of the gripper systems 8 in the running direction or in the sense of an inclination with appropriate correction of the bow movement possible. In Fig. 7 is selected to describe a first independently operable drive configuration of a representation corresponding to FIG. Here, the drive of the conveyor system 1 1 in the application unit 19 via at least one independently operated first drive motor 25 on the axis of the lower Anlagetronnnnel 3.2 in synchronization of the movement of the sheet B to move the sheet-fed offset printing machine.

The sheet separation takes place via an independently operated second drive motor 26 in connection with the suction head 13 in the sheet feeder 1.

Thus, the conveyor chains 23 and the sprockets of the upper bearing drum 3.1 are offset by the first drive motor 25 via the sprockets of the lower bearing drum 3.2 in transport movement. If both sprockets of the lower abutment drum 3.2 are coupled to a rigid axle, the position of the leading edge of the signature B can be adjusted relative to the movement of the sheetfed offset printing machine by the drive movement of the first drive motor 25 via the driven gripper systems 8. This can be done in a simple manner a precisely fitting sheet transfer from the gripper systems 8 to the plant drum 3.2 to the impression cylinder 5 in relation to the machine cycle of the sheetfed offset printing press.

If each of the sprockets of the lower conditioning drum 3.2 is provided with its own first drive motor 25, by means of an independently controlled drive movement of the sheet B on the gripper systems 8 both in terms of the position of the sheet leading edge in the transport direction and in terms of a possible skew the sheet leading edge are aligned. The signals for controlling the first and second drive motors 25, 26 with respect to the sheet position are obtained from sheet position sensors 20 in the region of the feed table 2 and the sheet guiding device 21 in the sheet movement on the gripper systems 8 and fed via data lines 27 to a controller 24. In the controller 24, the position data of the signatures B are then processed together with machine cycle related signals, which are supplied to the controller 24 via a machine data line 29 from a machine controller of the sheet-fed offset printing press. This is a target-actual comparison the measured values are compared with position data of an expected sheet position specified by the machine control. The deviations obtained therefrom are processed into control signals, which are conducted via control lines 28 to the first and second drive motors 25, 26 in order to control the sheet conveyance for the correction of misalignments of the printed sheets B via their drive movement.

Advantageous characteristics in connection with the invention described are summarized again as follows:

1 . By parallel guidance of the gripper systems 8 with the feed table 2 pushed by the suction head 13 sheet B are similar to an investment area with a conventional investment sheet on a sheet feeder. 1

2. If the sheet feeder is blocked, sheet B remains in sheet feeder 1.

This avoids waste on sheet B, which would have to be taken from a belt table before rebooting.

3. The orientation of the signature B can be during the transport of the

Sheet B from the sheet feeder 1 to the first printing unit D1 done.

4. Axially and thus transversely to the paper direction, the page register can be adjusted in a simple and advantageous manner by moving a gripper system 8 during transport, wherein the sheet B is held during the displacement over the entire length.

5. The alignment with respect to the oblique curve and the position of the sheet leading edge in the sheet conveying direction R is controlled in a simple manner inline via the forward movement of the gripper systems 8.

6. A sensor (sheet position sensors 20) with one or more control loops allows early, late, double and oblique sheets possibly already on the feed table 2 (contact sheet) to recognize and hold, if a misalignment should not be ausregelbar. Thus, print sheet B with misplaced sheets does not arrive as a source of error in the transport to the printing press. 7. When using one or more individual drives on the sheet feeder 1 and / or on the suction head 13 and / or on the conveyor system 1 1 and / or on the feeder unit 19 an inline orientation of the early / late bow is possible and a special alignment device for the gripper systems. 8 in Bogenför- direction R can therefore be omitted ..

8. Due to the concept of sheet feeding by means of gripper systems 8 and a conveyor system 1 1 with conveyor chains 23 on guide rails 12 in the sheet system can be omitted by designing the conveyor paths a base configuration for height adjustment of the printing units D1, D2 in high-stacking machines. 9. In the configuration, a first printing unit D1 and a succeeding printing unit D2 may be constituted similarly if a sheet transport drum in the form of a delivery drum is used as the lower registration drum 3.2 (feed drum). 10. The bowing is significantly improved especially for cardboard material, since damage such as scratches o. Ä. Eliminate by the simple bowing. 1 1. A belt table, also as suction belt table, with suction air supply suction belts and belt rollers is eliminated.

12. Such a sheet system less susceptible to stoppers and allows easier operation. It therefore promises minimal operator intervention, which in turn follows the emergence of less waste.

LIST OF REFERENCE NUMBERS

1 investor

2 feed table

3.1 upper drum

3.2 lower investment drum

4 transfer drum

5 impression cylinders

6 form cylinder

7 blanket cylinder

8 gripper system

9 grippers

10 guide rollers

1 1 conveyor system

12 guide rails

13 suction head

14 investor stacks

19 investor unit

20 sheet position sensor

20.1 Sheet position sensor

21 sheet guiding device

22 gripper / gripper row

23 conveyor chain

23.1 conveyor chain

23.2 conveyor chain

24 control

25 drive motor

26 drive motor

27 data line

28 control line / suction head, drive motor

29 control line / machine control

30 drive motor 31 drive motor

32 recess

33 tension roller

34 Drum Disc / Sprocket

35 drum axis

D1 printing unit

D2 printing unit

R conveying direction

A alignment track

Ü takeover route

B print sheet

S Movement

Claims

claims

Loading unit for a sheet-fed rotary printing machine with one or more printing units (D1, D2) and / or paint modules, with a substructure of each double-sized transfer drums (4) and counter-pressure cylinders (5), wherein the application unit with a sheet feeder (1), a conveyor unit and a feed table (2) is provided, wherein the application unit has a relation to a single-size blanket or form cylinder single or double-sized investment drum (3.2), which is associated with a sheet-guiding drum of a first printing unit (D1) of the sheet-fed rotary printing press, characterized in that the Conveying unit as a lower conveyor drum (3.2) with an upper support drum (3.1) connecting endless conveyor system (1 1) is formed, wherein the upper support drum (3.1) is associated with the sheet feeder (1) and in that means relative to the upper support drum ( 3.1) and / or to the lower plant drum 3.2) circumference-related adjustment of en dlosen conveyor system (1 1) are provided.

Mooring unit according to claim 1, characterized

that the upper bearing drum (3.1) is associated with a feed table (2) and that the feed table (2) is associated with the sheet feeder (1), wherein the sheet takeover on the upper feed drum (3.1) to different positions of the printing sheet (B) in whose conveying direction (R) is adjustable.

Mooring unit according to claim 1 or 2, characterized

in that the lower bearing drum (3.2) is associated with an impression cylinder (5) of the first printing unit (D1) of the sheet-fed rotary printing press, and that the sheet transfer from the lower application drum (3.2) to the impression cylinder (5) to different positions of the signature (B) in its conveying direction (R) is adjustable.

Mooring unit according to one or more of claims 1 to 3,

characterized in that the conveyor system (1 1) as an endless chain conveyor with a plurality of gripper systems (8) is formed, wherein the gripper systems (8) extending between two parallel to each other in guide rails (12) conveyor chains (22, 23) and the guide rails (12) form a closed guideway including the lower abutment drum (3.2) and the upper abutment drum (3.1) and that in the direction of the conveying direction (R) extending portion of the conveyor system (1 1) means for shifting the gripper systems (8) to the Conveyor chains (23) in or against the conveying direction (R) are provided.

Mooring unit according to one or more of claims 1 to 4,

characterized in that in connection with the upper bearing drum (3.1) and / or the lower bearing drum (3.2) means for adjustably receiving in the gripper systems (8) engaging catch forks (17) are provided.

Mooring unit according to one or more of claims 1 to 5,

characterized,

in that in the region of the upper abutment drum (3.1) and / or the lower abutment drum (3.2) are provided for adjustable transverse displacement of the conveyor chains (23, 23.1, 23.2) from the continuous guide track within the guide rails (12).

Mooring unit according to one or more of claims 1 to 6,

characterized,

in that preferably in the region of the conveyor system (11) leading from the upper feed drum (3.1) to the lower feed drum (3.2), means for independently driving each of the conveyor chains (23, 23.1, 23.2) with the associated gripper systems ( 8) are provided within their respective guide rails (12), wherein the conveyor chains (23,

23.1, 23.2) synchronously and jointly with respect to cooperating devices leading or lagging or asynchronous with kurzeitiger leading or lag respectively one of the conveyor chains (23, 23.1, 23.2) are driven relative to the other.

8. application unit according to one or more of claims 1 to 7,

characterized in that for the position detection of the sheet-fed rotary printing machine to be supplied sheet (B) of the upper bearing drum (3.1) and / or the lower bearing drum (3.2) and / or the conveyor system (1 1) one or more measuring systems with sheet position sensors (20, 20.1 ), which are coupled to an evaluation unit and a controller, wherein the controller with a on the conveyor system (1 1) acting actuator for position correction of gripper systems (8) is operatively connected.

9. laying unit according to one or more of claims 1 to 8,

characterized in that for the position detection of the sheet-fed rotary printing machine to be supplied sheet (B) of the upper bearing drum (3.1) and / or the lower bearing drum (3.2) and / or the conveyor system (1 1) one or more measuring systems with sheet position sensors (20) adjacent is associated, which are coupled to an evaluation unit and a controller (24), wherein the controller (24) with a on the conveyor system (1 1) acting actuator for position correction of gripper systems (8) is in functional connection.

10. application unit according to one or more of claims 1 to 9,

characterized,

in that the conveyor system (11) and / or the suction head (13) of the sheet feeder (1) are each provided with a separate motor drive (25; 26; 30, 31), and in that the motor drives (25; 26; 31) are coupled to the machine control of the sheet-fed rotary printing press by means of the controller (24) such that the printed sheets (B) transported by the conveyor system (11) in their position in the conveying direction (R) with respect to the machine cycle of the sheet-fed rotary printing press accurately aligned to the rotational movement of the sheet-fed rotary printing press.

1 1. Mooring unit according to one or more of claims 1 to 10,

characterized,

the upper abutment drum (3.1) and / or the lower abutment drum (3.2) are provided with one or two independent motor drives (25), and in that the motor drive (s) (25) are controlled by the control (24) with the machine control of the sheet-fed rotary printing machine are coupled.

12. application unit according to one or more of claims 1 to 10,

characterized,

in that one or both conveyor chains (23) of the conveyor system (11) are each provided with an independent motor drive (30, 31), and in that the motor drives (30, 31) are coupled to the machine control of the sheet-fed rotary printing press by means of the controller (24) are.