EP1507727A1

EP1507727A1 - Delivery device on a sheet processing machine

Info

Publication number: EP1507727A1
Application number: EP03725136A
Authority: EP
Inventors: Ulrich Beitel; Rolf Martin Lange; Eckhard Braun
Original assignee: MAN Roland Druckmaschinen AG
Current assignee: Manroland AG
Priority date: 2002-05-17
Filing date: 2003-05-02
Publication date: 2005-02-23
Anticipated expiration: 2023-05-02
Also published as: CN100402397C; WO2003097500A1; JP2005525981A; EP1507727B1; US20060011078A1; CN1652989A; DE10222545A1; JP4065273B2; DE50305757D1; ATE346006T1

Abstract

An offset printing machine layout unit feeds printed sheets to a second stack (8) or folding (13) or other processing unit under the sheet transport belt (3, 4) system (5) using a toothed guide (22) to a sheet transporter (20) fed in the pickup drum (7) rotation direction (10).

Description

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The invention relates to a delivery device on a sheet processing machine according to the preamble of claim 1. The delivery device can preferably be used for sheet printing and / or sheet coating machines.

A delivery device of this type is known for sheet-fed rotary printing presses from DE 24 30 212 A1. The delivery device has a sorting device, which optionally places the printed copies on two delivery stacks. For this purpose, the print copies are subjected to a quality control within the printing press. A rotating first chain conveyor feeds the printed copies to a first delivery stack. The first chain conveyor is assigned a removal drum with gripper systems, which is followed by a second chain conveyor. Depending on the quality determined, the printed copies can be placed on the first or second delivery stack.

From DE 198 19 491 C1, a sheet delivery for a rotary printing press with an endlessly rotating conveyor system that feeds the sheets to a first delivery stack and with a drum that acts as a switch in front of the delivery stack and has at least one gripper system is known. The drum is used for optional or permanent sheet removal and is assigned to the lower run of the conveyor system. Another stacking system is assigned to the drum for the purpose of storing the sheets. Outside the lower run, a sheet guiding device is arranged with a recess running across the width of the format. The gripper system of the drum cuts the recess with its flight circle and the further stacking system is arranged approximately below the drum. The second stacking system is as Pallet or lattice box, for example for receiving waste sheets, as well as a stacking system with slings and straight pushers for exact stacking.

Another delivery for a sheet-fed rotary printing press is known from DE 43 22 324 A 1, which among other things has a modular structure. For example, a dryer section is arranged as a module within the boom. Furthermore, a copy switch is assigned to the delivery, which is modularly arranged after the last sprocket of the sheet conveying system in the conveying direction. Waste and sample sheets can be laid out separately by activating the copy switch outside the main stack.

From DE 195 23 881 A1 a rotary printing press with a delivery device and rotating conveying means is known, which is followed by a further processing unit with sheet or product-carrying cylinders in the conveying direction. Folding processes can be carried out while the sheets / products are being conveyed. For this purpose, at least one folding module is arranged downstream of the delivery device in the conveying direction, one of the folding modules being integrated in the conveying path of the rotating conveying means.

It is disadvantageous in the case of the latter two designs that the length of a printing press inevitably increases due to the subassemblies, such as the copy switch and stack, which are arranged downstream of the sheet conveying systems, or the downstream folding modules.

The invention has for its object to provide a delivery device on a sheet processing machine of the type mentioned, which avoids the disadvantages mentioned, which in particular allows an in-line connection of printed and / or varnished sheets with at least one other work line. The task is solved by the training features of claim 1. Further training results from the subclaims.

A first advantage is based on the fact that the printed and / or varnished sheets can be deposited on a first delivery stack or - with the activation of a drum acting as a switch - on a second stacking system or fed to a folding module with at least one downstream folder.

It is also advantageous that the second stacking system can be used as an auxiliary stacking device during non-stop operation. If a stack change is imminent on the first delivery stack, a sheet transport gap is created by means of the drum acting as a switch in order to avoid a possible collision of the incoming sheets with the non-stop device to be inserted. This mode of operation improves the process stability when the sheets are laid out on the first delivery stack. The production speed can be maintained when the sheets are deposited on the first delivery stack. Sheets with color fluctuations as well as start-up sheets etc. can be avoided on the first delivery stack by sorting and depositing these sheets on the second stack system beforehand.

A further advantage is that the delivery device can be used more universally by a linkage with a folding module with at least one folder, so that intermediate storage of sheets is not necessary and format-variable publishing products can be produced.

The folding device or devices can be coupled as a folding module to the laying device, in particular a drum which sorts out the sheets. In this case, such a folding module can preferably be retracted or extended laterally on the extension arm using insert technology.

The folders are preferably designed according to the pocket folding principle, Training according to the sword fold principle or a combination thereof can also be realized. Since the printing material is already available as sheet material, the use of a cross cutter in the delivery is not necessary.

It is also advantageous that the delivery device can be used in one operating mode exclusively for the production of folded sheets using the drum serving as a switch. Furthermore, the first stack of jibs is used as waste. Sample sheet delivery etc. can be used by the drum being inactive, for example for a short time. When the drum is inactive, the delivery device can still be used to deliver unfolded sheets to the first delivery stack.

The invention will be explained in more detail using an exemplary embodiment. This shows schematically:

1 shows a delivery device with a first and second

Stacking system and a faiz module.

In a sheet-fed rotary printing press, a delivery device 1 is arranged downstream of a printing unit or a coating unit in the conveying direction 2 of the sheets to be deposited.

The delivery device 1 consists among other things. from an endlessly circulating sheet conveyor system 5 with a plurality of gripper systems fixed thereon, the sheet conveyor system 5, preferably as a chain conveyor, having an upper and a lower strand 3, 4. The sheet conveyor system 5 feeds printed and / or lacquered sheets to a first delivery stack 9 (main stack system) and deposits them there.

The lower run 4 of the sheet conveying system 5 is at a short distance a preferably pneumatically actuated sheet guide device 6 is assigned. Outside of the lower run 4, a cut-out in the sheet guiding device 6 is arranged at a short distance from the sheet conveying system 5. An arch-guiding drum 7 is assigned to the lower run 4 in the area of the recess. The drum 7 has at least one gripper system on the circumference, which cuts the recess with its flight circle. A second stacking system 8 is preferably arranged approximately below the drum 7 for the sheet deposit.

The sheet conveying system 5 extends over the first delivery stack 9, which acts as the main stack. In the conveying direction 2, the sheet conveying drum 5 is assigned the sheet-guiding drum 7 in front of the first delivery stack 9, and dryer systems 21 (UV dryer, IR -T dryer or other systems) arranged. Furthermore, this drum 7, for example on the last printing / coating unit, is preceded by measuring devices for quality control of the sheets.

The drum 7 is preferably, based on a single-sized blanket / forme cylinder, designed as a double-sized drum 7 with two gripper systems arranged symmetrically on the circumference. The drum 7 can also be designed with a single-sized diameter and a gripper system as well as with multi-sized diameters with a corresponding number of gripper systems arranged symmetrically around the circumference.

The drum 7 acts as a switch for selectively or continuously removing sheets from the conveying flow of the sheet conveying system 5 rotating in the direction of the first delivery stack 9. For this purpose, the drum 7 is preferably assigned to the sheet conveying system 5 in a horizontally arranged part thereof. In the direction of rotation 10 of the drum 7, a sheet guide 11 is arranged in the sheet outlet at a defined distance from the flight circle of the gripper systems, which is preferably coupled to a pneumatic system. In a first embodiment, the sheet guided on the drum 7 can be deposited on the second stacking system 8. The simplest version of the second stacking system 8 is a pallet or a lattice box for receiving waste sheets. As an alternative, at least sling means and straight pushers can be arranged for exact edge formation for the purpose of stack formation.

In a further embodiment, a folding module 12 is arranged downstream of the drum 7 in the direction of rotation 10. The folding module 12 can be moved in and out laterally in the delivery device 1, preferably to the conveying direction 2 of the sheets, using the push-in technique. The folding module 12 can preferably be retracted / extended on the B side of the delivery device 1. For this purpose, the folding module 12 is preferably provided with lockable rollers or can be moved by means of linear guides.

In a first mode of operation, the second stacking system 8 remains in the delivery device 1 and serves to receive sheets which are not fed from the drum 7 to the folding module 12. For example, these are waste sheets that occur when the processing machine starts up. Then, for example, the second stacking system 8 is stopped and the sheets are fed from the drum 7 to the folding module 12. In a second mode of operation, the second stacking system 8 in the delivery device 1 can be stopped or removed from the delivery device 1 and the sheets are fed from the drum 7 exclusively to the folding module 12. With a second stack system 8 that has been shut down or removed, the first delivery stack 9 can be used, for example, in the event of waste, for the purpose of depositing sheets.

In the direction of rotation 10, the drum 7 is preferably followed by a sheet transport device 20, for example a belt conveyor system, and this sheet transport device 20 is followed by the folding module 12, which has at least one folder 13.

The sheet transport means 20 is, for example, a drivable belt conveyor System designed with an upper and a lower, endlessly circulating belt for frictional sheet transport. The direction of transport of the belt conveyor system is opposite to the conveying direction 2 of the sheet conveyor system 5 lying above it.

Between the sheet-guiding drum 7 and the sheet transport means 20, a guide element 22 is preferably arranged axially parallel to the drum 7, which supports the "peeling" of the sheet from the drum 7. At the same time, the guide element 22 serves as a guide element for forwarding the sheets released by the gripper system of the drum 7 to the sheet transport means 20. The guide element 22 is preferably designed with comb-shaped tines in the direction of the lateral surface of the drum 7 and is arranged at a short distance from the drum 7. so that the grippers of the drum 7 can pass the free spaces between the prongs of the stripping element 22. The comb-shaped tines merge in the direction of the sheet transport means 20 into a guide surface for the sheet guide.

The front part of the guide element 22 is preferably tapered, preferably wedge-shaped, in the direction of the drum 7 and the guide surface for the sheet guide preferably follows the taper in the direction of the sheet transport means 20. Here, too, the comb-shaped tines can be made tapered.

In a further embodiment, the guide element 22 is designed as a flow channel, which is arranged axially parallel to the drum 7 and is coupled to a pneumatic system and has tines which merge into the guide surface. The guide surface and / or the tines have openings for the discharge of blown air, which support the "peeling" of the sheets from the drum 7 and the transfer to the downstream sheet transport means 20.

In a further embodiment, the sheet-guiding drum 7 is coupled to a pneumatic system, for example via a rotary leadthrough in the center of the axis. pelt and has an air-permeable outer surface, so that the drum 7 can be operated as a drum 7 carrying the bow on an air cushion. Alternatively, a plurality of pneumatically actuated nozzles and / or mechanical actuating means, for example lifters, are arranged in the region of the grippers on the drum 7 in order to support detachment of the front edge of the respective sheet from the drum 7 for further transport in the direction of the sheet transport means 20.

The folding module 12 has at least one folding device 13, wherein each folding device 13 can be designed according to the pocket fold principle or sword fold principle or a combination thereof.

Such a folding device 13 has an adjustable, preferably format-variable stop 15 arranged below the sheet conveying system 5 in the direction of a delivery exit 16, and in a stuffer box 17 there are at least two oppositely drivable, first and second folding rollers 18, 19, preferably over the maximum format width of the Extending sheet material, arranged.

In the case of only one folder 13 in the folding module 12, a folding delivery or a folding sheet stacker is arranged downstream of the folding rollers 18, 19, which preferably transport the sheets with fold breakage laterally out of the delivery device 1, for example on the B side, lying or standing.

In the case of a plurality of folding apparatuses 13 in the folding module 12, a second and possibly a further folding apparatus 13 is arranged downstream of the first folding apparatus 13, the folding delivery or the folding sheet stacker being connected to the last folding apparatus 13.

A first folder 13 based on the pocket folding principle will be described in more detail below by way of example. The drum 7 is arranged in the direction of rotation 10 of the guide element 22 and the sheet transport means 20, the sheet transport means 20 are arranged in the stowage space 17 over the maximum format width of the sheet material at least the two counter-rotating rollers 18, 19 and the folding rollers 18, 19 in the conveying direction of the soil gene transport means 20 a folding pocket 14 downstream. A stop 15 is arranged within the folding pocket 14 so that it can be positioned in a variable format. After the first fold has taken place, the sheets can be fed to at least one further folder 13 as required. For example, a transverse fold can be achieved in the first folder 13 and a longitudinal fold takes place in the downstream second folder 13, preferably designed according to the sword fold principle. The second folder 13 is followed by a third folder 13, which in turn is designed according to the sword fold principle. A new longitudinal fold then takes place in the third folder 13. The folding product produced in this way can be transported in the form of a scale or preferably standing on a folding break laterally to the conveying direction 2 from the delivery device 1.

The folding module 12 is coupled to the machine network of the sheet processing machine. The pre-setting of the machine data is also carried out synchronously in the folding module 12. For example, the folding module 12 is automatically adapted to different format sizes or substrate thicknesses, and previously saved job data can be called up again for repeat jobs.

The mode of action is as follows:

The sheets transported by the sheet conveying system 5 pass the dryer system 21 (if required also a powder device) in the conveying direction 2 and are fed to the first delivery stack 9 and deposited there. The gripper systems of the drivable drum 7 are inactive.

If the gripper systems of the drum 7 are optionally activated, the sheets can be fed to the second stacking system 8 in the direction of rotation 10 of the drum 7. This mode of operation can be implemented, for example, when waste sheets or sheets of reduced quality are produced, when sample sheets are removed, or when changing non-stop stacks (in the first delivery stack).

Alternatively, the bends in the direction of rotation 10 of the drum 7 are Neten folding module 12 continuously or periodically fed. With periodic feeding, if necessary, unfolded sheets can be fed to the first delivery stack 9, alternatively to the second stacking system 8.

When the drum 7 is activated and the folding module 12 is activated, the sheets abut against the format-variable stop 15 when they enter the folding pocket 14, and each form a sagging crease due to the kinetic energy still present in the compression space 17, which is individually detected by the folding rollers 18, 19 , so that the sheets are pulled one after the other through the nip of the folding rollers 18, 19 and there is a first fold break in each sheet. The sheets provided with a first fold break are fed to the downstream folders 13 if necessary and then laid out.

Bezuqszeichenaufstellun

1 delivery device

2 Direction of conveyance

3 upper run

4 lower run

5 sheet conveyor system

6 sheet guiding device

7 drum

8 second stacking system

9 first boom stack

10 - Direction of rotation

11 sheet guide

12 - folding module

13 - folder

14 - folding pocket

15 - stop

16 - Boom access

17 - stowage space

18 - first folding roller

19 - second folding roller

20 - sheet transport

21 dryer system

22 guide element

Claims

claims

1. Delivery device on a sheet processing machine with an endlessly rotating sheet conveying system that feeds the sheets to a first delivery stack and with a drum that acts as a switch in the conveying direction in front of this delivery stack and has at least one gripper system for sheet removal, the drum being assigned to the lower run of the sheet delivery system a second stacking system for the sheet deposit is assigned to the drum and a sheet guiding device with a cut-out for the discharge of sheets to the second stacking system is arranged at a short distance from the lower run, characterized in that in the direction of rotation (10) the drum (7) is followed by a sheet transport means (20) and this is followed by a folding module (12) having at least one folder (13).

Delivery device according to claim 1, characterized in that a guide element (22) is arranged between the drum (7) and the sheet transport means (20) axially parallel to the drum (7).

Delivery device according to Claims 1 and 2, characterized in that the guide element (22) has comb-shaped tines which merge into a guide surface in the direction of the lateral surface of the drum (7).

4. Delivery device according to claim 1 and at least 2, characterized in that the front part of the guide element (22) is tapered in the direction of the drum (7).

5. Delivery device according to at least claim 1, characterized in that the folder (13) is designed according to the pocket fold principle or sword fold principle or a combination thereof.

6. Delivery device according to claim 5, characterized in that the folder (13) below the sheet conveyor system (5) in the direction of the delivery riser (16) has an adjustable stop (15) and in a stuffer box (17) at least two oppositely driven folding rollers (18 , 19) are arranged.

7. delivery device according to claim 6, characterized in that the stop (15) in a folding pocket (14) is arranged variable in size.

8. Delivery device according to claim 6, characterized in that the folding rollers (18, 19) extend over the maximum format width.

9. delivery device according to at least claim 1, characterized in that within the delivery device (1) of the folding module (12) to the conveying direction (2) the sheet can be moved in and out laterally.