DE102017111309A1 - Sheet transfer in docking unit - Google Patents

Abstract

An application unit (19) for a sheet-fed rotary printing press is provided with one or more printing units (D1, D2) and / or paint modules, which are equipped with a substructure of double-size transfer drums (4) and counter-pressure cylinders (5). The application unit (19) is provided with a sheet feeder (1), a conveyor system (11) and a feed table (2) and has an abutment drum (3.2) associated with a sheet-guiding drum of a first printing unit (D1). To improve the handling, the conveyor system (11) is formed as the lower feed drum (3.2) with an upper feed drum (3.1) connecting endless chain conveyor. The conveyor system (11) is assigned to the feed table (2) following the sheet feeder (1) and can be controlled in a time-dependent manner for sheet transfer of printed sheets having different substrate thicknesses from the feed table (2).

Description

The invention relates to a device for sheet transfer in a placement unit according to the preamble of claim 1.

Laying units for singulating and targeted tactual feeding of printed sheets to a processing process are known on sheet-fed rotary printing presses. These have counter-pressure cylinders and transfer drums for sheet delivery and work approximately on the flexographic printing or offset printing process. Also known in this regard are coating machines such as painting machines.

On all known sheet-fed printing machines, the application and alignment of the printing material is carried out in a device for sheet-fed equipment. A sheet feeding device is supplied by a sheet pile stack isolated sheet by a shingled sheet transport by means of a belt table. The scale flow of the printed sheet can be made by means of suction belts via a so-called suction belt table.

A sheet handling device often has pneumatically operated side marks for aligning the sheet side edges. Front and top marks are provided for guiding and aligning the sheet leading edge. The alignment means are to be adjusted to variable formats of the printed sheets.

Sensor devices serve to control the position of leading edges, side edges or an inclined position of the printed sheets. They also control system locks in the event of a lack of sheet position accuracy in sheet transport.

Pre-grippers following the sheet-feeding device cooperate with rotating transfer drums. The sheets are subjected to abrupt changes of direction and strong delays or accelerations.

Out DE 43 43 616 A1 For example, a docking unit is known in a modular printing press system. The application unit has a cooperating with the printing cylinder of a printing unit first conditioning drum, which is double-sized and has circumferentially two gripper systems. The first is a single-size second investment drum arranged vertically offset in the sheet conveying direction. A single-sized feed drum is the second investment drum arranged vertically offset in height and is connected to the sheet transfer with a tilted arranged feed table. This sheet acceleration system on a high-pile feeder for the processing of cardboard is used on a printing machine for processing 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 docking unit is built by the large number of drums consuming. The variety of sheet transfers and curvature of the drums affects the sheet running adversely. Particularly disadvantageous is the unit replacement when using a high pile feeder.

In bowing machines are rotating pre-grippers as in DE-AS 2 063 618 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 the DE 27 18 314 A1 a rotating pregripper with two gripper systems is known, upstream of a plant table in the conveying direction and a downstream of the same investment drum is arranged downstream. 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 the DE 10 2005 012 527 A1 For example, there is known a sheet processing machine applying unit in a sheet processing machine having a sheet forming method adapted to be applied to a sheet processing machine. 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.

Out DE 199 33 304 A1 a landing unit for a sheet processing machine is known, which should be simply constructed with improved bowing. An investment drum, a feed table and an investor are combined in one module. The axis of the double-sized bearing drum is arranged in or above a horizontal plane formed by the axes of all printing cylinders. Each gripper system pivotally mounted on the plant drum consists of a gripper shaft, some arranged on the gripper shaft grippers with associated Greiferaufschlagleisten and front marks arranged thereon.

Many of the abovementioned partial solutions for the clocked sheet feed to sheet-fed presses are outdated and can no longer fulfill increasing demands on quality, performance, costs and availability.

It would be particularly desirable that the signatures are not repeatedly exposed to acceleration and deceleration processes and additionally required changes of direction during the transport of the substrate. The gripper closure adapted to the transport of each individual signature and adapted to the machine cycle for detecting its leading edge should as far as possible already be able to be produced in the vicinity of the sheet feeder. The shingled sheet transport known as particularly prone to error should, if possible, be omitted.

Special effort for the air supply to Saugbändertischen by the arrangements of fans, a complex multi-chamber principle and a complicated Schrägbogenkorrektur should be omitted. The orientation of the sheet should be able to be carried in the transport movement during transport of a sheet separation in the sheet feeder serving suction head to a counter-pressure cylinder in a first printing unit of a sheet-fed press.

This would significantly more time to align the sheets on the transport to the first printing a sheetfed 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, which allows in particular a simple modular structure and allows improved sheet management of the sheet.

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 may comprise a single- or double-sized feed drum, which is associated with a sheet-guiding drum of a first printing unit of the sheet-fed rotary printing press.

According to the invention, it is provided that the conveyor 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. The upper feed drum is assigned to the sheet feeder via a feed table associated therewith, and the position and / or the time of pickup are adjustable by the feed system from the feed table to different substrate thicknesses or are self-adjusting.

In an advantageous embodiment, it is provided that the lower bearing drum is double-sized and formed from the drum body of a delivery drum and at the bearing of a transfer drum of the first printing unit of the sheet-fed rotary printing machine is arranged and that the upper investment drum is formed with a single-large diameter.

In an advantageous embodiment, it is provided that the conveyor system is designed as conveyor chains exhibiting endless conveyor with gripper systems. The gripper systems have grippers for detecting, holding and transporting printed sheets and leading edge stops for aligning sheet to be detected and are guided on the transport and the return path between the upper and lower support drum at least in the movement parallel to the feed table with guide rollers in guide rails.

In an advantageous embodiment, it is provided that the feed table is assigned to the sheet feeder in the amount of the upper edge of a sheet pile. A suction head arranged in the sheet feeder above the sheet stack for sheet separation conveys printed sheets separated from the sheet stack directly onto the feed table. The upper abutment drum is associated with the feed table near the edge of the sheet stack and the adjoining region of the conveyor system is substantially parallel to the feed table in the conveying direction.

In an advantageous embodiment, it is provided that the feed table has recesses extending in the conveying direction and designed as feed table engagements. In these feed table interventions dive the open gripper and associated with these leading edge stops of the gripper systems on the conveyor system in the movement in the conveying direction during the sheet takeover. In an advantageous embodiment, it is provided that the area of the conveyor system adjoining the upper contact drum is to a small extent removed in the conveying direction from the extension of the feed table.

In an advantageous embodiment, it is provided that the feed table is slightly removed in the conveying direction following the upper abutment drum from the plane of expansion of the conveyor system.

In an advantageous embodiment it is provided that an inclination between the feed table relative to the adjoining the upper bearing drum in the conveying direction of the conveyor system can be adjusted in accordance with a printing material thickness curve in the conveying direction.

In an advantageous embodiment, it is provided that the feed table two or more sheet position sensors are assigned, which are designed to detect a sheet leading edge of a conveyed over the feed sheet in a specific position or over a range of motion.

In an advantageous embodiment it is provided that the application unit is associated with a controller which is connected to the feed position arranged sheet position sensors via a data line and a first control line with a machine control of the sheet-fed rotary printing press. The controller is adapted to perform a determination of position data of the sheet leading edge of a sheet conveyed over the feed table. Furthermore, the controller carries out a determination of specifications for position data of the leading edge of the printed sheet from data of the machine control.

In an advantageous embodiment, it is provided that the controller is connected by means of a second control line with an intrinsic motor drive or an electromechanical suction control of the suction head in the sheet feeder. The controller performs a target-actual comparison of the position data and the predetermined position data. From this, control data for a control of the suction head required on the basis of the desired-actual comparison are obtained.

In an advantageous embodiment it is provided that a device for setting an inclination of the surface of the feed table in the conveying direction in dependence on control data of the machine control is adjustable.

In an advantageous embodiment, it is provided that the conveyor system assigned a device for adjustable gripper control of the gripper on the gripper systems in the sheet transfer to the feed. The controller is coupled to the gripper control so that the grippers close in a particular position or within a range of motion.

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 bearing drum on one or offset in height above a horizontal plane formed by the axes of all counter-pressure cylinder allows for a horizontally arranged feed table at the level of the stack 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 planar surface and provided with longitudinal openings, in which the open at the inlet to the upper bearing drum gripper fingers of the gripper systems of the conveyor system. With a horizontal arrangement of the conveyor table is advantageous that the conveyed from the sheet stack individualized sheet arrive on a greatly shortened conveying distance to their alignment marks 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 Anvil 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 after known manner in stoppers on the belt table and must be cleared which makes 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 with sheet control sensors in the course of the conveyor system is connected to a closed loop and ensures that early, late, double and oblique sheets are already recognized on the investment sheet and are excluded from the acquisition in 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 can be done in machine operation, since the forward movement of the separated sheet can be directly influenced by means of the single drive.

Due to the concept of sheet feeding by means of the gripper system and rail transport in the sheet system, the base of the printing units may be omitted in high-stacking machines.

Sheetfed offset presses are held or made competitive in the future. There is no need to make any difference between the first printing units and the following printing units. As delivery drum or as a lower investment drum, a delivery drum can be used. Card stock bowing will be massively improved by avoiding scratches and other damage.

There is neither a belt table nor belt rollers. The sheetfed system will significantly reduce the number of stoppers in operation and bring a real benefit to the customer, as less waste is created and much easier operation is required by minimal operator intervention.

The pre-gripper from below, which was previously used in the system technology, will disappear in the continuous system. Since a takeover of the substrate is done from the top, an adjustment to the substrate thickness is required. This is currently being solved with great effort by wedge or eccentric settings. According to the invention no complicated adjustments are required. The actuator is a curve similar to that of the boom discharge. This can be set manually or from the control center to the paper thickness.

An important embodiment element are inclined gripper bumps in the conveying direction for the grippers on the gripper system, as used in so-called jib systems, ie gripper systems which are already used in a jib conveyor. An inclined to the movement path of the conveyor system in the field of sheet transfer comb-shaped contact sheet forms another basic element of the inventive solution.

The printed sheets are taken over at different times depending on the sheet thickness. A stepless adjustment to the thickness values of the substrates to be processed can also be done inline during the machine run in the production process.

Overall, there is a significant cost reduction with a large processable bandwidth at the same time. Above all, there are also great advantages in high-quality cardboard by minimizing markings on their often sensitive surfaces.

The invention will be explained in more detail using an exemplary embodiment. Showing:

1 a sheet feeder with a laying unit for a sheet-fed rotary printing machine in a side elevation,

2 a schema of the sheet transfer situation between gripper system and feed table and

3 a view of the feed table.

A sheet-fed rotary printing machine according to 1 (Sheet-fed offset printing machine) and has one or more printing units D1, D2 and / or paint modules. Upstream of the first printing unit D 1, opposite to a conveying direction R, is a laying unit 19 with an endless revolving conveyor system 11 provided with an impression cylinder 5 in the first printing unit D1 cooperates. Each of the first printing unit D1 downstream printing unit D2 or paint module has a transfer drum 4 and one of these in the conveying direction R downstream impression cylinder 5 for the sheet transport. Each impression cylinder 5 all printing units D1, D2 is a single-sized blanket cylinder 7 and a simple-sized form cylinder 6 assigned.

In each printing unit D1, D2, starting from the single-size printing blanket 7 and form cylinder 6 the impression cylinder 5 and transfer drums 4 twice as large and designed to carry two gripper rows 22 designed for sheet transport.

The landing unit 19 consists of a sheet feeder 1 a feeding table 2 and one each based on the single-sized form cylinder 6 single or double-sized upper and a lower conditioning drum 3.1 . 3.2 , The upper investment drum 3.1 and the lower drum 3.2 are by two spaced apart the working width of the sheet-fed rotary printing press arranged on both sides endless conveyor chains 23 having conveyor system 11 connected with each other. The conveyor chains 23 are each using two sprockets on the upper and the lower drum 3.1 . 3.2 guided. The conveyor system 11 In the exemplary embodiment, there are five on the conveyor chains 23 in guide rails 12 and over the sprockets of the upper and lower drums 3.1 . 3.2 circulating gripper systems 8th on. The gripper systems 8th are designed as bar-shaped conveying elements, which are located between the conveyor chains 23 extend. They have distributed over their length each have a larger number of grippers 9 on which evenly distributed a series of leading edge attacks 25 are assigned to the sheet orientation. The grippers 9 serve to transport the sheet B by detecting and holding at the sheet leading edge 26 ,

The feed table 2 is directly following a located in the conveying direction R upper edge of a sheet feeder 1 held bow pile 14 arranged and aligned substantially horizontally. The feed table 2 is the surface of the sheet pile 14 assigned a suction head 13 upstream, by means of which the respective uppermost signature B from the sheet pile 14 separated and by means of suction conveyors 13.1 towards the feed table 2 is advanced to the sheet leading edge 26 into the scope of a takeover by the gripper 9 on the gripper systems 8th has come.

Above the feed table 2 is the upper drum 3.1 arranged over the on the conveyor chains 23 guided gripper systems 8th on guide rails 12 in the area of sheet transfer parallel to the feed table 2 be guided over a takeover Ü. An isolated print sheet B is thus from the gripper systems 8th in the inlet at the feed table 2 to this open grippers 9 added. The introduction of the sheet B by the suction conveyor 13.1 of the suction head 13 into the gripper 9 takes place until the sheet leading edge abuts 26 at the leading edge stops 25 , so that then the sheet B at the sheet leading edge 26 can be recorded and removed. The process of alignment and the sheet takeover takes place at the just needed on the conveyor system 11 fully effective machine speed.

Below the feed table 2 is a device with one or more sheet position sensors 20 arranged. By means of the sheet position sensors 20 the position of the edges (sheet leading edge 26 , Curved side edge 27 ) one straight from the sheet pile 14 isolated and from the gripper system 8th with the grippers 9 acquired sheet B and in terms of its respective position with respect to the machine cycle and the position with respect to the orientation when taking the separated sheet B from the feeder pile 14 for transport in the conveying direction R on the conveyor system 11 evaluated.

Below the conveyor system 11 is a sheet guiding device approximately parallel to the sheet transport path 21 arranged. By means of the sheet guiding device 21 each individual sheet B is picked up by a gripper system 8th from the upper drum 3.1 to the lower drum 3.2 where he led to the impression cylinder 5 the first printing unit D1 is transferred. In the field of sheet guiding device 21 can use more sheet position sensors 20 be arranged to the position of the sheet edges in the gripper system 8th continue to monitor during transport at machine speed.

The resulting from the respective measurement of the sheet position by means of the sheet position sensors 20 resulting position data are used to adjust the sheet position with respect to the processing clock and the page orientation of each individual sheet B prior to transfer to the sheet-fed rotary printing press.

On or under the feed table 2 is therefore in one embodiment, a measuring system with sheet position sensors 20 arranged, which is the actual position of a front and / or side edge of the sheet B on the feed table 2 finds. In a controller hereby a target-actual comparison is made. By means of a side pulling device and / or a leading edge alignment of the sheet B can then be controlled in a desired position for acquisition by the gripper 9 on the gripper systems 8th be aligned.

In a preferred embodiment gem. 1 is the feed table 2 arranged substantially horizontally, so that of the suction head 13 on the sheet pile 14 in the sheet feeder 1 isolated printed sheet B im Area of the feed table 2 can be recorded or taken over in the course of a transfer route Ü. This sheet transfer takes place in a consistently substantially horizontal conveying plane to that of the investment drum 3.1 supplied and virtually overhead with open downward grippers 9 incoming gripper systems 8th , Specifically, the sheet transfer takes place at those in areas of the feed table 2 dipping open claws 9 , The assignment to the gripper systems 8th is determined by means of in 2 and 3 shown leading edge stops 25 against which the printed sheets B are applied before the grippers 9 getting closed.

The investment drum 3.1 is within the docking unit 19 above the feed table 2 arranged such that the substantially horizontal conveying plane of the feed table 2 tangential to the corresponding gripper system 8th That's about the investment drum 3.1 enters, runs. The upper and lower attachment drum 3.1 . 3.2 can, based on the single-size form cylinder 6 be formed either single or double size. The constructive selection for this can be made depending on the space requirements and the demands on to be processed printing materials.

The lower investment drum 3.2 can be arranged with its axis (in alignment) or offset in height (offset in parallel) above a plane through the aligned axes of all impression cylinders 5 the printing units D is formed

At least the lower investment drum 3.2 Can be used as double-sized drum for simultaneous recording of two gripper systems 8th be educated. It then has a favorable for the guidance of stiffer materials for printing larger diameter, so that the sheet to be transported B is not bent so much and thus easier to the impression cylinder 5 of the first printing unit D can be passed. In this case can be used as output assembly for the lower drum 3.1 a cantilever drum can be used, as it is well known as part of a cantilever conveyor a sheet-fed rotary printing machine of the type concerned here.

The upper investment drum 3.1 does not have this problem because the sheet B there always only after the expiry of the gripper systems 8th from the investment drum 3.1 in the grapples 9 the gripper systems 8th be recorded.

In a further development is the lower investment drum 3.2 and the sheet guiding device 21 one measuring system each with at least one sheet position sensor 20 , for position detection (actual value) on gripper systems 8th in the upper drum 3.1 , above the sheet guiding device 21 and on the lower drum 3.2 associated printed sheet B adjacent. The position detection can be on at least one side edge and the sheet leading edge 26 the arcuate sheet B refer. The sheet position sensors 20 are circuit-coupled with an evaluation unit for the target-actual comparison and a controller, such that the gripper systems 8th in an embodiment transverse to the conveying direction R is laterally movable.

In a further embodiment, the functional connection of sheet position sensors 20 , Evaluation unit and control such that a lateral movement of the gripper system 8th feasible and / or at an oblique position of the sheet B to the conveying direction R its positional offset recognizable and the sheet B by the in or against the conveying direction R obliquely adjustable gripper system 8th can be aligned in nominal position.

The feeding table 2 and / or the sheet guiding device 21 and / or the lower drum 3.2 associated sheet position sensors 20 Depending on the accuracy requirements, they can be used together or individually.

The lower investment drum 3.2 is in the exemplary embodiment after 1 directly to the impression cylinder 5 upstream of the first printing unit D1. Each in the conveying direction R downstream printing unit D2 or any other processing unit is then by a double-sized transfer drum 4 and one double-sized impression cylinder 5 educated.

The mode of operation of the landing unit 19 is as follows:
In the sheet feeder 1 is an arcuate sheet B by means of the suction head 14 from the top of the sheet pile 13 isolated in the machine cycle and continuously accelerated in the conveying direction R to machine speed. In the forward movement, the sheet is the feed table 2 fed and examined here preferably already in terms of its location and on double sheets or bow damage out.

When entering the sheet B on the feed table 2 can after preferred metrological detection of an actual value and a target-actual comparison in the controller, a first orientation of the sheet B to a sheet side edge 27 respectively.

Immediately thereafter or in motion superimposition, the transport takes place in the conveying direction R against leading edge stops 25 on the open with the grippers 9 leading overhead gripper system 8th , The grippers 9 then capture the sheet B when the Sheet leading edge 26 at the leading edge stops 25 is applied. The grippers 9 come already to the effect while the sheet leading edge 26 at the leading edge stops 25 is present, since they act simultaneously as so-called deck marks and the sheet leading edge 26 Secure until the signature B in the gripper end on the gripper system 8th is fixed. This process with the detection of the position of the sheet leading edge 26 of the sheet B takes place in a synchronous movement between sheet B and gripper system 8th parallel to each other along the feed table 2 during the transport movement along the takeover route Ü.

That of the rotating investment drum 3.1 expired gripper system 8th is on the conveyor system 11 in guide rails 12 moved further and pulls the fixed in the gripper closure arcuate sheet B from the feed 2 and transports this while the investment drum 3.1 is constantly moved at machine speed, in the conveying direction R on the sheet guiding device 21 down. The sheet guiding device 21 may be formed as a simple smooth or contoured guide surface over which the signature B is dragged. The sheet guiding device 21 can 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 and tightened.

In the field of sheet guiding device 21 can be a further or initial metrological recording of the sheet B with evaluation of the situation and appropriate correction on the investment drum 3 respectively. Subsequently, the sheet B of the investment drum 3.2 in the transfer area to the count of the first printing unit D1 impression cylinder 5 to hand over. From the impression cylinder 5 of the first printing unit D1, the printing sheet B is then after the first printing of the transfer drum 4 of the second printing unit D2 and in a known manner to the subsequent impression cylinder 5 to hand over. Thereafter, any further processing can take place.

When the investment drum 3.2 is designed as a double-sized drum, their drum body can be taken over by a delivery drum at the end of the sheet-fed offset printing press. At printing unit D is already a corresponding storage position for the standard attachment of a transfer drum 4 provided, in which the jib drum is used. The jib drum is also intended to accommodate endless chain conveyor systems.

In 2 the solution according to the invention is in detail with a sheet transfer situation between a gripper system 9 and the feed table 2 shown. The gripper system 8th is on lateral guide rollers 10 in the guide rails 12 of the conveyor system 11 from the conveyor chains 23 guided. In 2 is the gripper system 8th with the upper drum 3.1 circulated and is moving through the takeover route Ü above the feed table 2 to take over a sheet B ready. One from the suction head 13 Separate sheet B is placed on the feed table 2 pushed. The sheet B is on the gripper system 8th grasped by the grippers 9 on a gripper shaft 9.2 on the gripper system 8th be moved by cams, against gripper surcharges 9.1 is trapped.

The grippers 9 dive when approaching the feed table 2 in recesses, which are considered to be over an area in the conveying direction R of the feed table 2 extending feed interventions 2.1 are executed (see 3 ).

The gripper serves 9.1 are guided in a well defined path and approach as the surface of the feed table moves 2 , so that there is a fixed distance relation. However, since different thicknesses of printing materials must be processed, it is provided that the gripper closure may not take place until the printed sheet B with its sheet leading edge 26 smooth on the feed table 2 rests and in a predefined relation to the sheet B taking gripper system 8th located. Therefore, every gripper system 8th in the scope of the different substrate thicknesses to be processed obliquely from the surface of the feed table 2 Removing led. This is in 2 represented by a printing material thickness curve P in dash-dotted line. The printing material thickness curve P in this case represents the path of movement of the gripper attachments 9.1 opposite the surface of the feed table 2 represents.

For functionally correct transfer of the signature B to the gripper systems 8th need the grippers 9 right then or at the earliest then to close against the Greiferaufschläge 9.1 be controlled when the detection of the sheet B at the time of the printing material thickness corresponding position on the substrate thickness P can be done. This is basically the case when the sheet leading edge 26 safe on all leading edge stops 25 on the gripper system 8th abutment and the gripper cuffs 9.1 in a distance corresponding to the arch thickness from the feed table 2 are located.

To ensure this, multiple sheet position sensors can be used 20.1 from below into the area of takeover Ü of the feed table 2.1 are directed, the location of the sheet leading edge 26 to capture. Advantageously, the sheet position sensors monitor 20.1 while a longer range of feed table 2 in the conveying direction R, which corresponds to all eligible takeover positions corresponding to known sheet thicknesses of the substrates to be processed.

The monitoring of the sheet transfer takes place by a balance of the movement of the gripper system 8th previously known position of the leading edge stops 25 with that of the sheet position sensors 20.1 measured position of the sheet leading edge 26 ,

These are the of the sheet position sensors 20.1 obtained measurement data via a data line 16 a controller 15 supplied, the further related to the working cycle of the sheet-fed rotary printing machine data from the machine control via a first control line 16 be forwarded. This allows the controller 15 the position of the sheet leading edge 26 of the sheet B on the feed table 2 in relation to the leading edge stops 25 during the takeover move over the takeover route Ü constantly check.

• 1. Der Greiferschluss wird über eine variable Greifersteuerung für das Greifersystem 8 dann angesteuert, wenn die Bogenvorderkante 26 in ebener Lage, also mit dem der Bogendicke der Druckbogen B entsprechenden Abstand zu den Greiferaufschlägen 9.1 zum Zuführtisch 2 auch an den Vorderkantenanschlägen 25 anliegt.
• 2. Der Greiferschluss wird über eine Greifersteuerung für das Greifersystem 8 immer zu einem immer gleichen Zeitpunkt ausgeführt, welcher der maximalen zu verarbeitenden Bogendicke entspricht (siehe strichliierte Linie der Maximalposition 26.1 in 3). Dies erfolgt so, dass die Bogenvorderkante 26 von dem Saugkopf 13 bis zum Übergabezeitpunkt in ebener Lage an den Vorderkantenanschlägen 25 anliegend gehalten wird.
• 3. Der Greiferschluss wird über eine Greifersteuerung für das Greifersystem 8 immer zu einem immer gleichen Zeitpunkt ausgeführt, welcher einer mittleren zu verarbeitenden Bogendicke entspricht (siehe strichliierte Linie der Bogenvorderkante 26.2 in 3). Damit dies sichergestellt werden kann, wird der Zuführtisch 2 in seiner Neigung in Förderrichtung R verstellt (siehe Bewegungspfeil P.1), so dass sich je nach Bedruckstoffdicke eine immer wieder neue Bedruckstoffdickenkurve P ergibt. Die aktuell zu verarbeitende Bedruckstoffdicke wird dabei jeweils in Position der Bogenvorderkante 26.2 übernommen. Die Bogenvorderkante 26 wird vom Saugkopf 13 bis zum Übergabezeitpunkt in ebener Lage an den Vorderkantenanschlägen 25 anliegend gehalten.

Ensuring correct gripper closure of the grippers 9 on the gripper system 8th can be done in three ways:

• 1. The gripper is closed by a variable gripper control for the gripper system 8th then driven when the sheet leading edge 26 in a flat position, ie with the arch thickness of the sheet B corresponding distance to the gripper serves 9.1 to the feed table 2 also at the leading edge stops 25 is applied.
• 2. The gripper is closed by a gripper control for the gripper system 8th always at the same time, which corresponds to the maximum sheet thickness to be processed (see dashed line of the maximum position 26.1 in 3 ). This is done so that the sheet leading edge 26 from the suction head 13 until the time of transfer in a level position at the leading edge stops 25 is held contiguous.
• 3. The gripper is closed by a gripper control for the gripper system 8th always carried out at the same time, which corresponds to an average sheet thickness to be processed (see dashed line of the sheet leading edge 26.2 in 3 ). For this to be ensured, the feed table 2 adjusted in its inclination in the conveying direction R (see movement arrow P.1), so that, depending on the substrate thickness results in a constantly new substrate thickness curve P. The currently being processed substrate thickness is in each case in position of the sheet leading edge 26.2 accepted. The bow leading edge 26 is from the suction head 13 until the time of transfer in a level position at the leading edge stops 25 attached.

This ensures that, without additional adjustment measures, the printing sheets B are always allocated to the correct time to be assigned according to their respective substrate thicknesses by the grippers 9 in a level position on the gripper system 8th with a position exactly corresponding to the desired position of the sheet leading edge position on the conveyor system 11 can be taken over.

In 3 is the feed table 2 with the feed table interventions 2.1 shown in clipping, with gripper fingers of the gripper 9 and leading edge stops 25 in the feed table interventions 2.1 are shown positioned. In the feed table 2 is also a sheet position sensor 20.1 shown, being over the entire width of the feed table 2 at least two sheet position sensors 20.1 (possible are more than two) are provided. A sheet B is in contact with its sheet leading edge 26 at the leading edge stops 25 shown. In dashed lines are layers for a maximum position 26.1 the arch leading edge 26 for marking a maximum processable substrate thickness and a minimum position 26.2 the arch leading edge 26 For marking a minimum processible substrate thickness or a middle transfer position with an adjustable feed table 2 , The transfer route Ü is also shown moving from a position near the beginning of the feed table interventions 2.1 up to the maximum position 26.1 enough.

• 1. Durch Parallelführung der Elemente Zuführtisch 2 (Anlageblech), Greifersystem 8, Druckbogen B (vom Saugkopf 13), ist der Anlagebereich ähnlich wie ein herkömmliches Anlageblech im Bogenanleger 1 gestaltet.
• 2. Druckbogen B bleiben bei Anlagesperrung im Bogenanleger. So entsteht wenig Makulatur an frischen Druckbogen B, die von einem Bändertisch bei Neustart entnommen werden müssen.
• 3. Die Ausrichtung der Druckbogen B zur Bogenvorderkante kann während dem Transport vom Bogenanleger 1 zum ersten Druckwerk D1 erfolgen. Gleichzeitig kann quer zur Förderrichtung 11 der Seitenpasser eingestellt werden.
• 4. Die Ausrichtung hinsichtlich Schrägbogen und Lage der Vorderkante wird über die Vorwärtsbewegung der Greifersysteme 8 gesteuert.
• 5. Eine Sensorik mit Regelkreisen erkennt Früh-, Spät-, Doppel- und Schrägbogen schon auf dem Zuführtisch / Anlageblech, so dass die Druckbogen B dort verbleiben können. Während des Transportes zur Druckmaschine sind diese Druckbogen B als Fehlerquelle ausgeschaltet.
• 6. Bei Verwendung von einem oder mehrerer Einzelantrieben (25, 26, 30, 31) an der Anlegeeinheit 19, ist eine Inline-Ausrichtung der Früh-/Spätbogen während des Transports motorisch möglich.
• 7. Durch das variable Konzept der Bogenzuführung mittels Greifersystemen 8 und mit Transport auf Förderschienen 12 über eine größere Höhendifferenz in der Bogenanlage können die dazu bisher notwendigen Sockel für jedes der Druckwerke D1, D2 bei Hochstapelmaschinen entfallen.
• 8. Ein Unterschied zwischen Druckwerk D1 und den Folgedruckwerken D2 ist nicht mehr erforderlich, wenn als untere Anlagetrommel 3.2 (Zuführtrommel) eine Auslegertrommel verwendet wird.
• 9. Es gibt keinen Bändertisch mit Saugkammern, Luftversorgung, Steuerung, Saugbänder oder Bänderwalzen.
• 10. Die Verwendung dieser Anlegeeinheit 19 verringert die Störungen im Betrieb der Bogenzuführung zur Bogenrotationsdruckmaschine und bringt Vorteile durch einfachere Bedienung und minimierte Bedieneingriffe, wodurch wiederum weniger Makulatur im Anlagebereich erzeugt wird.

As an advantage of the named invention, the following facts should again be mentioned in summary:

• 1. By parallel guidance of the elements feed table 2 (Contact plate), gripper system 8th , Printed sheet B (from the suction head 13 ), the investment area is similar to a conventional investment sheet in the sheet feeder 1 designed.
• 2. Printing sheet B remains in the sheet feeder when the machine is locked. This results in little waste on fresh sheet B, which must be taken from a belt table at restart.
• 3. The alignment of the sheet B to the sheet leading edge can during transport from the sheet feeder 1 take place to the first printing unit D1. At the same time can be transverse to the conveying direction 11 the page register can be adjusted.
• 4. The orientation with respect to the slanted arc and the position of the leading edge is determined by the forward movement of the gripper systems 8th controlled.
• 5. A sensor with control circuits detects early, late, double and oblique sheets already on the feed table / contact plate, so that the printed sheets B can remain there. During transport to the printing press these sheets B are turned off as a source of error.
• 6. When using one or more individual drives ( 25 . 26 . 30 . 31 ) at the landing unit 19 , is an inline orientation of the early / late arch during transport possible by motor.
• 7. Due to the variable concept of sheet feeding by means of gripper systems 8th and with transport on conveyor rails 12 over a larger height difference in the sheet system can be omitted so far necessary socket for each of the printing units D1, D2 in high-stacking machines.
• 8. A difference between printing unit D1 and the subsequent printing units D2 is no longer required, if as a lower investment drum 3.2 (Feeding drum), a delivery drum is used.
• 9. There is no belt table with suction chambers, air supply, control, suction belts or belt rollers.
• 10. The use of this landing unit 19 reduces the interference in the operation of the sheet feeder to the sheet-fed rotary printing press and brings benefits through easier operation and minimized operator intervention, which in turn generates less waste in the investment area.

LIST OF REFERENCE NUMBERS

1

investor

2

feed

2.1

Zuführtischeingriff

3.1

upper investment drum

3.2

lower investment drum

4

transfer drum

5

Impression cylinder

6

form cylinder

7

Blanket cylinder

8th

gripper system

9

grab

9.1

gripper

9.2

gripper shaft

10

guide rollers

11

conveyor system

12

 guide rail

13

suction head

13.1

suction device

14

 feeder pile

15

 control

16

 data line

17

 first control line / machine control

18

 second control line / suction head

19

investors unit

20

 Sheet position sensor

20.1

 Sheet position sensor

21

 Sheet guiding device

22

 Gripper / gripper row

23

 conveyor chain

24

 arch lock

25

 Leading-edge stop

26

 Sheet leading edge

26.1

 Maximum position arc leading edge

26.2

 Minimum position sheet leading edge

D1

 printing unit

D2

 printing unit

R

conveying direction

A

 aligning

Ü

 takeover route

P

 Bedruckstoffdickenkurve

B

 sheet

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 4343616 A1 [0007]
• DE 2063618 [0008]
• DE 2718314 A1 [0009]
• DE 102005012527 A1 [0010]
• DE 19933304 A1 [0011]

Claims (13)

Laying unit for a sheet-fed rotary printing machine with one or more printing units (D1, D2) and / or paint modules, which are provided with a substructure consisting of double-sized transfer drums ( 4 ) and impression cylinders ( 5 ), wherein the application unit ( 19 ) with a sheet feeder ( 1 ), a conveyor unit and a feed table ( 2 ), wherein the application unit ( 19 ) one with respect 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 conveyor unit as a lower plant drum ( 3.2 ) with an upper conditioning drum ( 3.1 ) connecting endless conveyor system ( 11 ), wherein the upper bearing drum ( 3.1 ) the sheet feeder ( 1 ) via a feed table ( 2 ) and that the position and / or the time of takeover by the support system ( 11 ) from the feed table ( 2 ) is adjustable to different substrate thicknesses or self-adjusting .. Mooring unit according to claim 1, characterized in that the lower bearing drum ( 3.2 ) is double-sized and formed from the drum body of a delivery drum and at the bearing point of a transfer drum ( 4 ) of the first printing unit (D1) of the sheet-fed rotary printing press is arranged and that the upper bearing drum ( 3.1 ) is formed with a single-sized diameter. Mooring unit according to claim 1 or 2, characterized in that the conveyor system ( 11 ) as conveyor chains ( 23 ) having endless conveyor with gripper systems ( 8th ) is designed such that the gripper systems ( 8th ) Gripper ( 9 ) for capturing, holding and transporting printed sheets (B) and leading edge stops ( 25 ) for aligning sheet (B) to be detected and that the gripper systems ( 8th ) on the transport and the return path between the upper bearing drum ( 3.1 ) and the lower drum ( 3.2 ) at least in the region of movement parallel to the feed table ( 2 ) with guide rollers ( 10 ) in guide rails ( 12 ) are guided. Mooring unit according to one or more of claims 1 to 3, characterized in that the feed table ( 2 ) the sheet feeder ( 1 ) at the level of the upper edge of one in the sheet feeder ( 1 ) recorded sheet pile ( 14 ) and that one in the sheet feeder ( 1 ) above the sheet pile ( 14 ) arranged for sheet separation suction head ( 13 ) for the conveyance of the sheet pile ( 14 ) separated printed sheets directly onto the feed table ( 2 ) is formed, that the upper bearing drum ( 3.1 ) the feed table ( 2 ) near the edge of the sheet stack ( 14 ) and that is connected to the upper bearing drum ( 3.1 ) subsequent area of the conveyor system ( 11 ) substantially parallel to the extension of the feed table ( 2 ) is designed to extend in the conveying direction (R). Mooring unit according to one or more of claims 1 to 4, characterized in that the feed table ( 2 ) running in the conveying direction (R) and as feed table interventions ( 2.1 ) has recesses formed to receive open grippers ( 9 ) and associated front edge stops ( 25 ) of the gripper systems ( 8th ) of the support system ( 11 ) are formed in the movement in the conveying direction (R). Mooring unit according to one or more of claims 1 to 5, characterized in that the upper abutment drum ( 3.1 ) subsequent area of the conveyor system ( 11 ) slightly away from the extension of the feed table ( 2 ) is formed in the conveying direction (R). Mooring unit according to one or more of claims 1 to 5, characterized in that the feed table ( 2 ) relative to the upper abutment drum ( 3 .1) subsequent area of the conveyor system ( 11 ) slightly away from the level of extension of the support system ( 11 ) is formed in the conveying direction (R). Mooring unit according to one or more of claims 1 to 7, characterized in that an inclination between the feed table ( 2 ) relative to the upper abutment drum ( 3.1 ) in the conveying direction (R) subsequent area of the conveyor system ( 11 ) is designed to be adjustable according to a printing material thickness curve (P) in the conveying direction (R). Mooring unit according to one or more of claims 1 to 8, characterized in that the feed table ( 2 ) associated with two or more sheet position sensors ( 20.1 ) are provided, which for detecting a sheet leading edge ( 26 ) one above the feed table ( 2 ) conveyed sheet (B) are formed in a certain position or over a range of motion. Mooring unit according to one or more of claims 1 to 9, characterized in that the landing unit ( 19 ) a controller ( 15 ) associated with the at the feed table ( 2 ) arranged sheet position sensors ( 20.1 ) via a data line ( 16 ) and via a first control line ( 17 ) is connected to a machine control of the sheet-fed rotary printing press, wherein the controller for determining position data of a sheet leading edge ( 26 ) one above the feed table ( 2 ) Printed sheet (B) and for determining specifications for position data of a sheet leading edge ( 26 ) one above the feed table ( 2 ) to be conveyed sheet (B) is formed from the supplied from the machine control data. Mooring unit according to one or more of claims 1 to 10, characterized in that the control further by means of a second control line ( 18 ) with an own motor drive or an electromechanical suction air control of the suction head ( 13 ) in the sheet feeder ( 1 ), such that the controller ( 15 ) for forming a desired-actual comparison from the position data, which is taken from the measured data of the sheet position sensors ( 20.1 ) and the control data of the machine control, is formed, and that the controller ( 15 ) for the generation of control data for a required due to the target-actual comparison control of the suction head ( 13 ) is trained. Mooring unit according to one or more of claims 1 to 8, characterized in that the feed table ( 2 ) means for adjusting an inclination of the surface of the feed table ( 2 ) in the conveying direction (R) and that the means for inclination with the controller ( 15 ) such that an inclination of the feed table ( 2 ) is adjustable in dependence on control data of the machine control. Mooring unit according to one or more of claims 1 to 8, characterized in that the conveyor system ( 11 ) a device for adjustable gripper control of the gripper ( 9 ) on the gripper systems ( 8th ) at the sheet transfer at the feed table ( 2 ) and that the controller ( 15 ) with the device for adjustable gripper control for detecting a sheet leading edge ( 26 ) one above the feed table ( 2 ) conveyed sheet (B) is coupled, that closing the gripper ( 9 ) takes place in a certain position or within a range of motion.

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