Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F21/00—Devices for conveying sheets through printing apparatus or machines
  • B41F21/08—Combinations of endless conveyors and grippers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
  • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
  • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
  • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
  • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
  • B65H5/12—Revolving grippers, e.g. mounted on arms, frames or cylinders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/44—Moving, forwarding, guiding material
  • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
  • B65H2301/4433—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material
  • B65H2301/44331—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material at particular portion of handled material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/44—Moving, forwarding, guiding material
  • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
  • B65H2301/4433—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material
  • B65H2301/44336—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material using suction forces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/44—Moving, forwarding, guiding material
  • B65H2301/447—Moving, forwarding, guiding material transferring material between transport devices
  • B65H2301/4471—Grippers, e.g. moved in paths enclosing an area
  • B65H2301/44712—Grippers, e.g. moved in paths enclosing an area carried by chains or bands
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/44—Moving, forwarding, guiding material
  • B65H2301/447—Moving, forwarding, guiding material transferring material between transport devices
  • B65H2301/4471—Grippers, e.g. moved in paths enclosing an area
  • B65H2301/44714—Grippers, e.g. moved in paths enclosing an area carried by rotating members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/30—Chains
  • B65H2404/34—Gripper bars bridging at least two chains running synchronously and parallely
  • B65H2404/341—Details of driving or return drum
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/60—Other elements in face contact with handled material
  • B65H2404/69—Other means designated for special purpose
  • B65H2404/694—Non driven means for pressing the handled material on forwarding or guiding elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2406/00—Means using fluid
  • B65H2406/30—Suction means
  • B65H2406/34—Suction grippers
  • B65H2406/345—Rotary suction grippers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
  • B65H2511/10—Size; Dimensions
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
  • B65H2511/20—Location in space
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/13—Parts concerned of the handled material
  • B65H2701/131—Edges
  • B65H2701/1313—Edges trailing edge
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/13—Parts concerned of the handled material
  • B65H2701/131—Edges
  • B65H2701/1315—Edges side edges, i.e. regarded in context of transport
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2801/00—Application field
  • B65H2801/03—Image reproduction devices
  • B65H2801/21—Industrial-size printers, e.g. rotary printing press
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2801/00—Application field
  • B65H2801/24—Post -processing devices
  • B65H2801/31—Devices located downstream of industrial printers

Definitions

• Sheet processing machine with a sheet transport device and method for transporting sheets from a sheet guiding cylinder to a sheet conveying system
• the invention relates to a sheet-processing machine with a sheet transport device with a sheet from a sheet guiding cylinder receiving sheet conveying system and a method for transporting sheets from a sheet guiding cylinder to a sheet conveying system in a sheet-processing machine.
• the invention has for its object to provide an alternative sheet processing machine with a Bogentransportvornchtung and an alternative method for sheet transport.
• a sheet transfer from a sheet guiding cylinder to a downstream sheet conveying system should be further improved.
• the invention has the advantage that an alternative sheet processing machine with a sheet transport device and an alternative method for sheet transport are provided.
• a sheet transfer from a sheet guiding cylinder to a downstream sheet conveying system is further improved.
• a sheet transport device can be used within a sheet-processing machine, for example a sheet-fed printing machine, or in a delivery of a sheet-processing machine, for example a sheet-fed printing press.
• a sheet conveying system can be designed, for example, as a sheet guiding drum and, in particular, can be arranged between two printing cylinders of a sheet-fed printing press. Accordingly, a sheet-processing machine, in particular a sheet-fed printing machine, with a corresponding sheet transport device is also provided.
• the sheet conveying system includes a delivery drum, in particular in the delivery of a sheet processing machine is used.
• the delivery drum particularly preferably contains a sprocket shaft in order to move the gripping devices, in particular gripper carriages of a chain conveyor system, to take over sheet leading edges.
• the lateral sheet support segments or support elements can be made very narrow, which in turn leads to advantageous very narrow pressure-free side edges.
• the sheet support segments may be formed in the space between gripper carriage as a bracket or bracket to which a traction means, in particular a chain is guided, which is at least partially occupied by preferably elastic support elements, preferably such that these elements only in Area of the lateral sheet edges between gripper carriage and fixing devices, in particular suckers, are.
• the excess support members can be advantageously "stored” in a region where they are not in contact with the sheet.
• the support elements are used only at the points where there is still a substrate, in particular paper, between these support elements and the cylinder surface. The support elements are thus protected against contamination.
• the support elements contact only substrate material and never the dirty printing cylinder surface of a printing cylinder of a sheet-fed press.
• the entire device is thus much less susceptible to dirt and thus low maintenance.
• particularly narrow support elements particularly preferably results, it being shown that a preferably pneumatic fixing of the arch at the lateral sheet trailing edges or at the rear corners is sufficient.
• the sheet which is fixed or held on the cylinder jacket surface from the front edge to the trailing edge can easily be taken over by fixing devices arranged adjacent to the sheet support segments.
• the sheet support segments in particular support elements, have the function to press the sheet to the sheet guiding cylinder, in particular a printing cylinder, thereby preventing a "bow fall".
• the sheet on its way around the sheet guiding drum or delivery drum, in particular a sprocket shaft, the sheet can be supported on these sheet support segments, in particular support elements, and held close to sheet guide plates on the desired path, so that the sheet can not describe a secant.
• each sheet is detected at its trailing edge in a transfer center by fixing devices, in particular pneumatic suckers, which are preferably arranged exclusively in the region of the lateral sheet support segments.
• the vacuum required for suction is preferably generated "locally" by means of fixing devices operating according to the ejector principle.
• compressed air is preferably non-clocked via a rotary input of a rotatably mounted shaft of sheet guiding drum or delivery drum, in particular a rotary feed a Kettenradwelle transferred.
• a respective solenoid valve preferably a quick-acting valve, which is connected via a shortest possible line to a vacuum ejector.
• the sheets can be transferred from a rotating sheet guiding cylinder to revolving gripping devices, in particular gripper carriages, and a delivery system having a delivery drum.
• the delivery drum of the sheet conveying system has preferably adjacent to the sheet guiding cylinder arranged circumferentially, in particular rotating, driven sheet support segments, which in particular have recesses for the gripper carriage.
• the sheet support segments form with the cylinder jacket surface of the upstream sheet guiding cylinder a transfer center, in which the gripper carriage take over the sheet leading edges in the gripper closure of gripper systems of the sheet guiding cylinder.
• the arch support segments have, in particular, a small axial extent relative to the cylinder width.
• pneumatic means Be can also be pneumatic means Be provided which press the sheet on the cylinder surface and / or hold the sheet after the transfer centers on the sheet support segments or press against the sheet support segments.
• the sheets can be pressed by exactly two sheet support segments simultaneously in the transfer centers against the lateral surface of the upstream sheet guiding cylinder.
• a sheet guide which preferably extends far with a comb element in the area of the transfer centers, preferably in the sheet guide Stauerblasbohronne are arranged.
• the Stauerblasbohronne in the central region of the sheet guiding element over the machine width in a high density and in the adjacent areas, in particular in the sheet conveying direction upstream and / or downstream areas be arranged in a relation to the central region lower density.
• the blowing air of the sheet guiding element could also be varied or clocked or controlled according to the progress of sheet transfer or controlled according to sensor values.
• a sheet transport can be provided from a sheet guiding cylinder of a last work to a sheet conveying system in the delivery of a sheet-processing machine, wherein a sheet guiding element can be provided below the delivery drum.
• Fig. 1 Display of a sheet-processing machine with a
• Fig. 2 Perspective representation of the sprocket shaft with adjustable
• FIG. 3 Perspective view of the sprocket shaft with support elements supporting sheet support segments and fixing devices for the sheet trailing edge;
• Fig. 4 Side view of the double-sized Kettenradwelle arranged on chains pressing elements
• Fig. 5 Enlarged view of a sheet support segment with
• FIG. 6 execution of a pressure element for a guided on a hanger chain
• Fig. 7 execution of a contact element as a sucker for a
• FIG. 1 shows, for example, a delivery 1 of a sheet-processing machine, here in particular a sheet-fed printing machine, especially one
• Bogenoffsetrotationstikmaschine preferred in aggregate and series construction The machine is operated according to preferred in the offset method, with other printing methods such.
• B. screen printing can be integrated in the machine.
• the sheets are gripped by gripper systems of rotating cylinders at the front edge and transferred between the cylinders in the gripper closure.
• the sheets are dyed in an appropriate manner in a print nip formed by a cylinder and a blanket cylinder, each with one printing ink.
• one or more coating units can be provided, in which the sheets can be painted by a paint form cylinder.
• the cylinders arranged in the machine can be of single or multiple size, wherein a single-sized cylinder can accommodate at least one sheet and a double-sized cylinder at least two sheets of maximum size circumferentially.
• the machine is preferably associated with a turning device for turning the sheet in a mode perfecting during machine operation.
• Continue may also be processing facilities or processing plants, such. B. cold foil works, be integrated in the machine.
• the machine has a drive wheel, which drives particularly preferably as a continuous drive wheel train at least the sheet guiding cylinder of the machine.
• sheet transfer cylinders designed as transfer drums or transfer cylinders are also driven by the drive wheel train.
• the sheet guiding cylinders on the drive side of the machine each have intermeshing gears, which form the drive wheel train.
• the drive wheel train is driven by at least one main drive motor which drives at least one entry point into the drive wheel train.
• Rubber cylinders of the printing units are preferably also driven by the drive wheel train. Further rotating bodies or rolls of the machine or of the printing units can also be driven at least temporarily by the drive wheel train, wherein these can also be designed to be coupled to the drive wheel train.
• Plate cylinders of printing units can also be assigned to individual drives, in particular direct drives.
• Direct drives are in particular individual drives whose rotors are mounted in alignment and concentric preferably directly to the associated cylinders.
• the plate cylinder in question is then tracked electronically synchronized with the rubber cylinder, which is preferably driven by the main drive motor via the drive wheel train.
• the plate cylinder and / or blanket cylinder may be assigned a rotary encoder, which may be connected to a control unit of the printing unit and / or the machine control.
• the drive of the plate cylinder or can also be done via the drive wheel train from the main drive motor.
• a control device of the machine is preferably the current machine angle known.
• the machine angle can to be defined as the position of a cylinder in space.
• the machine angle can be derived or absorbed by the main drive motor.
• a rotary encoder in particular a rotary encoder, may be associated with a preferably rotating element of the machine, which feeds rotary encoder signals to the control device, in particular the machine control, or provides them for this.
• a sheet guiding cylinder of the machine in particular a sheet guiding cylinder according to a turning device not shown and / or a sheet guiding cylinder of a last work
• a rotary encoder preferably designed as a rotary encoder, be assigned.
• the rotary encoder can in particular be assigned to the last sheet guiding cylinder arranged immediately before the delivery 1 of the machine and / or connected to the control device and / or to a quality control device, for example to an inspection system.
• the sheet guiding cylinder has an at least approximately closed cylinder jacket surface and here is in particular a printing cylinder 2 of a last printing unit.
• the sheet guiding cylinder may also be a last cylinder in a paint or other processing plant.
• the printing cylinder 2 is executed here twice large and contains two diametrically arranged gripper systems located in gripper channels. From these gripper systems, the sheet leading edges are clamped for sheet transport and thus fixed.
• the sheet guiding cylinder can also be simple, triple or multi-sized.
• the sheet conveying system is furthermore arranged, which in particular has endlessly preferably continuous, circumferentially driven and guided gripping devices for taking over and transporting the sheets.
• the gripping devices are preferred arranged on traction means and endlessly driven by wheels and / or on deflection guides.
• the gripping devices are arranged in particular parallel to each other and evenly spaced between the traction means and preferably designed as a clamping gripper.
• the sheet conveying system here has, in particular, a chain conveyor system 3 with peripherally guided gripper carriages and a sprocket shaft 4 adjacently associated with the sheet guiding cylinder, in particular the impression cylinder 2.
• the chain conveyor system 3 contains here in particular on both sides of the frame of the display 1 on chain guide rails guided chains on which and between which the gripper carriage are attached.
• Each gripper carriage contains a clamping gripper system which, for example, has grippers fixedly arranged on a movable gripper shaft and fixed gripper clutches. About a rotation of the gripper shaft, a gripping movement for fixing a respective sheet leading edge can be controlled.
• the gripper shaft of a gripper carriage can be actuated in particular in the field of sheet transfer and in the sheet storage of cams.
• the gripping movements of the gripper carriages, in particular in the area of sheet transfer in the transfer centers of the sheet guiding cylinder, in particular impression cylinder 2, and in the region of the sheet deposit, in particular above the delivery stack 5, can be controlled by control cams preferably via the roller levers and cam rollers.
• the sheet transport takes place in the delivery 1 exclusively at the sheet leading edge by the gripping devices, in particular the gripper carriage.
• the sheets are preferably guided on guide elements, not shown, for example, sheet guide plates, wherein between the sheet and the sheet guide plates and an air cushion can be formed.
• guide elements not shown, for example, sheet guide plates, wherein between the sheet and the sheet guide plates and an air cushion can be formed.
• the Operating mode perfecting can be a non-contact sheet transport.
• one or more dryers and / or dusting devices can be provided on the sheet travel path.
• the delivery stack 5 in the sheet conveying direction BFR is preferably preceded by a sheet brake, which takes over the sheets to be deposited from the gripper carriages and delays their release from machine speed to depositing speed. After being decelerated by the sheet brake, the sheets are aligned with leading edge stops, trailing edge stops and / or side edge stops, not shown, and are neatly deposited on the delivery stack 5.
• the delivery stack 5 is preferably lowered by a Stapelhubantrieb, not shown, during the sheet deposition process such that the delivery stack surface forms an at least approximately constant storage level for the upcoming sheet.
• the sheet brake for example, contain at least two braking stations, which are preferably axially, ie transversely to the sheet conveying direction BFR, displaceable, in particular displaceable, are arranged.
• the braking stations are placed in particular on a respective lateral usually unprinted sheet edge.
• these can be placed on pressure-free corridors and / or on sufficiently dried color areas.
• Unnecessary braking stations can be deactivated and / or shifted from the area of the sheet format. Alternatively, however, post-grippers can also be used.
• Fig. 2 shows a perspective view of the sprocket shaft 4, which is assigned immediately adjacent to the last sheet guiding cylinder of the machine.
• the sprocket shaft 4 has a parallel to the axis of rotation of the adjacent sheet guiding cylinder shaft, which are assigned on both sides sprockets for the circulating chains of the chain conveyor system 3.
• the sprockets act with the respective chain guide rails for guiding the gripper carriage in Area of the sprocket shaft 4 together.
• the sprockets are thus coaxial and spaced from each other in particular fixedly assigned to the sprocket 4.
• the sprocket 4 is associated with a drive which rotatably drives the sprocket 4 synchronously to the drive wheel about its axis of rotation.
• the sprocket shaft 4 here carries a helical gear, which cooperates with the drive of the machine or is driven by this.
• the particular fixed to the sprocket 4 associated helical gear is preferably as part of the continuous drive wheel train or gear train of the machine in meshing with a gear of the immediately upstream sheet guiding cylinder, in particular of the impression cylinder 2.
• a guided in the range of the sprocket 4 gripper carriage of the chain conveyor system 3 takes a bow in a common transfer centers by gripper closure of a gripper system of the upstream sheet guiding cylinder, in particular of the impression cylinder. 2
• the sprocket shaft 4 has between the two sprockets at least two and preferably exactly two sheet support segments 6 for simultaneously supporting a sheet against the cylinder surface of the sheet guiding cylinder, in particular impression cylinder 2, on. At least one and preferably both sheet support segments 6 are axially displaceable relative to the sprocket 4, for example, mounted on a hub.
• each hub has exactly two arc support segments 6, which are arranged diametrically arranged fixed to the hub. Due to the common storage of the sheet support segments 6 on an axially displaceable relative to the shaft of the sprocket 4 hub a common adjustment of the sheet support segments 6 of the respective page.
• the hub may, for example, have rollers rolling on the surface of the shaft. It can be provided each hub, for example, assign six roles that run on preferably ground tracks of the sprocket 4.
• an adjusting means is provided for axial adjustment of the sheet support segments 6 in particular.
• one or for each hub is a drive, for example an electrically operating drive motor,
• the axial adjustment of the sheet support segments 6 can be made together with the axial adjustment of the braking stations of the sheet brake on the sheet format.
• the axial adjustment can continue to be made and / or monitored automatically on the basis of the same data by a control device, in particular the machine control.
• the sheet support segments 6 are preferably so far apart movable that sheet maximum format to be processed formats can be supported on the respective lateral sheet side edges. Further, it may be provided to shift one or both sheet support segments 6 to outside the maximum sheet size to allow, for example, a sheet transport without Bogenstützsegmente 6 or maintenance. It can also be the sheet support segments 6 and the hubs independently be axially adjustable or displaced or adjusted or relocated.
• the drive motors for axial adjustment of the arc support segments 6 bearing hubs are for example independently controlled by the control device, in particular machine control.
• the sheet support segments have 6 recesses or their circumferential extent is dimensioned accordingly.
• a respective arch support segment 6 a bracket 6, which is preferably held in a separate plane.
• the bracket 6 is circumferentially a supporting elements supporting traction means, in particular a pressing elements 7 supporting chain 8 assigned.
• the bracket 6 includes a circumferentially oriented guide for the traction means, in particular the chain 8, which thus in the circumferential direction or in and / or against the sheet conveying direction BFR relative to the bracket 6 can be displaced or moved.
• the traction means associated with the supporting elements, in particular the chain 8 associated pressing elements 7 are stored in accordance with displacement of traction means or chain 8 together in the circumferential direction along the bracket 6 and the guide of the bracket 6 displaced.
• the traction means in particular the chain 8, associated supporting elements, in particular pressing elements 7, have an arc contact surface with a minimum axial extent.
• the axial extent of an arc contact surface may be, for example, 0.5 mm to 3 mm, preferably at least approximately 1 mm.
• the support elements, in particular pressing elements 7, preferably contain elastic material or are made of elastic material.
• the pressing elements 7 may in particular contain rubber or be made of rubber.
• the support elements, in particular pressing elements 7, seen in sheet conveying direction BFR also have a wedge-shaped cross-section or an increased arc contact surface. In the circumferential direction or along the sheet conveying direction BFR, the extent of the pressing elements 7 can be, for example, up to 50 mm.
• a sheet against the cylinder surface of the sheet guiding cylinder, in particular impression cylinder 2 can be pressed and thus on this fixable or durable.
• a sheet camber is thus avoided as long as the sheet between the support elements, in particular pressing elements 7, and the sheet guiding cylinder, in particular impression cylinder 2, is located.
• a sheet is pressed exclusively by the support elements, in particular pressing elements 7, against the cylinder jacket surface and not sucked through Bogenstützsegmente 6.
• the Hub sleeve is preferably associated with a separate drive, which can shift the hub sleeve relative to the hub in the circumferential direction or in and / or against the sheet conveying direction BFR.
• the drive may for example be arranged directly on the hub or hub shell and displace the hub shell relative to the hub.
• the hub may, for example, have an internally toothed toothed segment into which a pinion driven by the drive engages.
• the hub shell or the drive is displaced correspondingly with the hub axially along the shaft of the sprocket shaft 4.
• the energy and / or signal transmission to the seated on the hub drive by means of a rotary inlet 1 1 of rotatably mounted Kettenradwelle 4.
• a cable guide in the interior of the sprocket 4 to about the machine center, where in particular a cable traction for storing the cable is provided. From the cable tow from a supply of the two each assigned to a hub drives.
• a sprocket shaft 4 and in particular a respective hub shell is assigned at least one fixing device for preferably pneumatic zone-wise fixing of a sheet trailing edge.
• each hub shell carries exactly two diametrically arranged fixing devices, which are preferably each firmly connected to the hub shell.
• the traction means in particular the chain 8, is in particular also displaced in and / or counter to the sheet conveying direction BFR along the guide of the bracket 6.
• a respective fixing device is so connected to the traction means, in particular a chain link of the chain 8, that an adjusting movement of the fixing simultaneously an adjustment of the traction means associated support elements, in particular of the chain 8 associated pressing elements 7 causes.
• FIG. 3 shows a perspective view of the sprocket shaft 4 with support elements, in particular pressing elements 7, supporting arch support segments 6, in particular brackets 6, and fixing devices for the sheet trailing edge.
• the fixing means are in particular exclusively in the area of the sheet support segments 6, in particular bracket 6, between the sheet support segments 6, in particular brackets 6, arranged, each one fixing directly a sheet support segment 6, in particular bracket 6, is assigned. Other fixing devices for the sheet trailing edge between the two outer fixing the rear corners corners fixing are not provided.
• exactly one fixing device is assigned to a respective arch support segment 6, in particular stirrup 6.
• the fixing devices are in particular in the longitudinal direction of the sheet, d. H. in the sheet conveying direction BFR, and / or in the sheet width direction, d. H. formed transversely to the sheet conveying direction BFR, format adjustable.
• the fixing means are formed together with support elements, in particular pressing elements 7, the sheet support segments 6, in particular bracket 6, adjustable in form.
• the fixing devices with the support elements, in particular pressing elements 7, can be adjusted simultaneously or jointly by the drive seated on the hub.
• a respective fixing device for the trailing edge of the sheet contains a contact element which preferably, as a vacuum cleaner 10, fixes a limited area of the sheet trailing edge in a sucking manner.
• each fixing device, in particular each vacuum cleaner 10 has a separate pneumatic Connection, wherein the pneumatic connections of the fixing devices, in particular vacuum cleaner 10, preferably with a common compressed air generator in pneumatic connection or flow connection.
• the compressed air generator provides, in particular, a pneumatic pressure that is permanently above atmospheric pressure and / or uncalculated, which is available correspondingly at the pneumatic connections of the fixing devices, in particular suction device 10.
• a compressed air generator for example, a compressor can be used.
• the pneumatic connection of the fixing devices also takes place via a rotary inlet 11 of the rotatably mounted sprocket shaft 4, in particular with the realization of a cable tow, for example in the middle of the machine.
• the compressed air generator is here in particular with both laterally arranged fixing the bow simultaneously fixing devices, in particular suckers 10 in combination.
• the compressed air generator with all or exactly four fixing, in particular suckers 10, in pneumatic connection or flow connection.
• a contact element of the fixing device has an at least approximately flat contact surface for an arc region.
• a sucker 10 has a suction surface, which transmits a suction effect of the fixing device to the sheet.
• the pneumatically acting suction cups 10 of the fixing devices preferably each have at least one opening for generated suction air in the suction surface, through which a sheet is held in contact with the suction device 10.
• each sucker 10 may have a number of openings or suction openings, for example four to six suction openings.
• the fixing devices may also have, for example, exchangeable contact elements, in particular suction cups 10, which have, for example, differently arranged or formed openings or openings.
• the contact surface of a contact element or the suction surface of a teat 10 for example, an extension of up to 20 mm in Sheet conveying direction BFR and / or have up to 50 mm transverse to the sheet conveying direction BFR.
• Each fixing device is preferably associated with an air control element, in particular immediately adjacent to the suction surface, which is preferably designed as a solenoid valve 13, particularly preferably as a quick-acting switching valve.
• the fixing devices could also have a separate holder, but are preferably the sheet support segments 6, in particular hangers 6, directly assigned.
• the contact surfaces of the contact elements, in particular the suction surfaces of the teat 10, the fixing devices are preferably always held at the level of the support elements, in particular the contact surfaces of the pressing elements 7, the sheet support segments 6.
• the contact elements, in particular sucker 10 may be received by a fixing device via a lockable plug connection.
• a contact element, in particular sucker 10 are assigned in the axial direction to a receptacle of the fixing device, wherein the contact element, in particular the sucker 10, can be received by the fixing device, for example via a ball catch in its position fixable.
• contact elements in particular suckers 10
• contact elements, in particular sucker 10 different material composition and / or shaping of a fixing device can each be associated with each other interchangeable.
• the contact elements, in particular vacuum cleaner 10 are quickly or without tools removably or exchangeably associated with the fixing devices.
• FIG. 4 shows a side view of the example double-sized sprocket 4 with arranged on traction elements support elements, in particular arranged on chains 8 pressing 7.
• the respective arch support segment 6, in particular a bracket 6, associated chain 8 is a closed chain 8 to a bracket. 6 placed and is guided by the bracket 6 in the circumferential direction.
• On the inside side is the chain 8 held by a tensioning means, in particular by a tension roller 9, in the desired or adjustable voltage.
• An adjusting means, in particular drive preferably an electrically operating drive motor, is provided for shifting the pressing elements 7 bearing chain 8 relative to the bracket 6 in and / or against the sheet conveying direction BFR in particular for setting or format setting.
• the chain 8 has hingedly interconnected chain links, to which the pressing elements 7 can be assigned.
• each chain link of the chain 8 exactly one pressing element 7 can be assigned.
• the pressing elements 7 are preferably assigned to the chain 8 changeable, wherein a respective pressing element 7 can be received by a chain link of the chain 8 positively and / or non-positively.
• a pressing element 7 is received by a chain link of the chain 8 via a lockable plug connection.
• a pressing element 7 is received by a respective chain link of the chain 8 via a screw connection.
• differently shaped pressing elements 7 can be assigned to a respective chain link of a chain 8 each interchangeable.
• pressing elements 7 of different material composition and / or shape can be assigned to a respective chain link of a chain 8 in each case interchangeable.
• the pressing elements 7 are quickly removable or replaceable chain 8 respectively the sheet support segments 6, in particular brackets 6 assigned.
• the fixing device has a compressed air connection connected to the compressed air generator and works according to the ejector principle.
• the fixing device contains an ejector 12, which opens into an outlet channel.
• the fixing device preferably has an air control element, which is designed in particular as a solenoid valve 13.
• each fixing device in particular each vacuum cleaner 10, an air control element, associated with the individual and / or remotely controllable solenoid valve 13, the air control element, in particular the solenoid valve 13, in particular controls the ejector 12 supplying compressed air.
• an air control element, in particular solenoid valve 13, one or preferably each fixing device can be made by a control device, in particular the machine control.
• the electrical control connection is also via a rotary inlet 1 1 of the rotatably mounted sprocket 4 and possibly a cable tow.
• an air control element, in particular solenoid valve 13 by the control device, in particular machine control, for order-related adjustment of the pneumatic effect of the fixing device, in particular of the teat 10, are controlled.
• the air control element, in particular the solenoid valve 13 the beginning, the intensity and / or the end of the pneumatic suction of the fixing device, in particular of the teat 10, adjustable or changeable.
• the adjustment or change can also be made while the machine is running or during the printing process.
• the suction effect of the fixing device, in particular of the teat 10 is influenced by the air control element, in particular solenoid valve 13, as a function of the machine speed and / or of printing material properties or set.
• the air control element, in particular solenoid valve 13, can cooperate with the control device such that the beginning, the intensity and / or the end of the pneumatic effect can be set manually or automatically.
• the respective one of the fixing device in particular sucker 10, associated solenoid valve 13 in particular the ejector 12 feeding compressed air is controlled so that the beginning, the intensity and / or the end of a suction is set.
• the adjustment of the suction air of the fixing device, in particular on the vacuum cleaner 10, by the air control element, in particular solenoid valve 13, can also be carried out as a function of sheet travel during sheet transfer and / or during sheet release. The sheet travel can therefore be influenced and controlled individually and / or remotely during the printing process.
• An automated adjustment of the suction effect on the individual fixing devices, in particular suckers 10, of the sprocket shaft 4 can be carried out, for example, according to sensor values.
• a dead time can be taken into account when building up the suction effect. This dead time can continue to be compensated, for example, speed-dependent.
• FIG. 6 shows an embodiment of a pressure element 7 for a guided on a bracket 6 chain 8.
• the pressure element 7 may be assigned to a chain link 8 of the chain changeable via a screw.
• the pressure element 7 is particularly elastic and has a circumferentially extending and a minimum axial extension having contact surface for a bow.
• the pressing member 7 may be made of rubber, for example. An elasticity of the pressure element 7 can be achieved in particular by the choice of material and / or a suitable shape design.
• FIG. 7 shows an embodiment of a contact element as a vacuum cleaner 10 for a fixing device.
• the teat 10 may be assigned to the fixing device, in particular the ejector 12, via a receptacle.
• the nipple 10 may have guide surfaces that are received or guided by guide surfaces of the fixing device.
• the teat 10 can be assigned in the axial direction of the fixing device, wherein preferably a lockable connector is provided for fixing the position.
• a lockable connector is provided for fixing the position.
• the teat 10 has at least one and in particular four openings and forms with centrally arranged supporting elevations the suction surface for the sheet trailing edge.
• the sucker 10 is preferably dimensioned such that the suction surface is always or permanently at the level of the contact line of the immediately adjacent support element, in particular pressing element 7, the sheet support segment 6.
• the teat 10 may further be associated with an elastic cover such as a rubber cover.
• the one or more openings of the teat 10 allow the action of a suction air generated by the ejector 12 partially on the sheet trailing edge, so that a sucking force holds the sheet trailing edge in contact with the suction surface of the teat 10.
• the sheet support segments 6, in particular the bracket 6, can be placed axially on the side edges of the new sheet format.
• the fixing devices, in particular suckers 10 can be placed on the sheet trailing edge of the new sheet format, wherein preferably at the same time the support elements, in particular pressing elements 7, are displaced such that only the respective Arc side edge of the new sheet format by supporting elements, in particular pressing elements 7, is contacted. If necessary, suitable support elements, in particular pressing elements 7, the sheet support segments 6, in particular brackets 6, and / or suitable contact elements, in particular sucker 10, the fixing devices are assigned.
• the suction air of the fixing is preferably obtained from the compressed air of a compressed air generator according to the ejector principle, wherein each of the fixing, in particular sucker 10, associated air control elements, in particular solenoid valves 13, control the suction precisely. If required, an individual and / or remotely controllable change in the suction air control can be made. For example, a control of the air control elements, in particular solenoid valves 13, carried out according to characteristics. Thus, a maximum suction during the sheet transfer in the transfer centers can be ensured. Subsequently, for example, a reduction of the suction effect can be carried out depending on the angle, since a lower suction force is sufficient for holding the sheet trailing edge resting against the suction surface of the teat 10. List of used reference numbers

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

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Citations (20)

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• 2018
  • 2018-10-02 EP EP18782711.8A patent/EP3694717B1/de active Active
  • 2018-10-02 WO PCT/EP2018/076844 patent/WO2019072649A1/de unknown
  • 2018-10-02 CN CN201880057439.4A patent/CN111315581B/zh active Active

Patent Citations (20)

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