EP4274792A1 - Maschinenanordnung mit mehreren jeweils bogenförmige substrate bearbeitenden bearbeitungsstationen - Google Patents
Maschinenanordnung mit mehreren jeweils bogenförmige substrate bearbeitenden bearbeitungsstationenInfo
- Publication number
- EP4274792A1 EP4274792A1 EP22737434.5A EP22737434A EP4274792A1 EP 4274792 A1 EP4274792 A1 EP 4274792A1 EP 22737434 A EP22737434 A EP 22737434A EP 4274792 A1 EP4274792 A1 EP 4274792A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction belt
- substrates
- belt table
- suction
- transport
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H11/00—Feed tables
- B65H11/002—Feed tables incorporating transport belts
- B65H11/005—Suction belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
- B41F13/64—Collecting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/001—Apparatus or machines for carrying out printing operations combined with other operations with means for coating or laminating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/007—Apparatus or machines for carrying out printing operations combined with other operations with selective printing mechanisms, e.g. ink-jet or thermal printers
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
- B41F23/045—Drying sheets, e.g. between two printing stations by radiation
- B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
- B41F23/045—Drying sheets, e.g. between two printing stations by radiation
- B41F23/0456—Drying sheets, e.g. between two printing stations by radiation by infrared dryers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
- B41F23/0463—Drying sheets, e.g. between two printing stations by convection
- B41F23/0466—Drying sheets, e.g. between two printing stations by convection by using heated air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0476—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0483—Drying combined with cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/08—Print finishing devices, e.g. for glossing prints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/04—Tripping devices or stop-motions
- B41F33/06—Tripping devices or stop-motions for starting or stopping operation of sheet or web feed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/007—Conveyor belts or like feeding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H11/00—Feed tables
- B65H11/007—Feed tables with front stop arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/06—Movable stops or gauges, e.g. rising and falling front stops
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- 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
- B41F21/12—Adjusting leading edges, e.g. front stops
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
- B41J13/0036—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material in the output section of automatic paper handling systems
-
- 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
- B65H2404/70—Other elements in edge contact with handled material, e.g. registering, orientating, guiding devices
- B65H2404/72—Stops, gauge pins, e.g. stationary
- B65H2404/725—Stops, gauge pins, e.g. stationary retractable
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- 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
- B65H2701/17—Nature of material
- B65H2701/176—Cardboard
Definitions
- Machine arrangement with several processing stations each processing sheet-shaped substrates
- the invention relates to a machine arrangement with a plurality of processing stations, each processing sheet-shaped substrates, according to the preamble of claim 1.
- the suction belt table described below is a machine unit for use in a machine arrangement that processes sheet-like substrates (referred to as sheets for short), such a machine arrangement having a plurality of machine units arranged one after the other in the transport direction of the sheets. At least two of these machine units have transport devices that transport the sheets.
- a suction belt table is used to transport sheets that have been processed or are to be processed along a linear transport path in the relevant machine arrangement, with these sheets being transported individually on at least one conveyor belt. While they are lying on the at least one conveyor belt, the individual sheets are each held in place by a suction force, d. H. held by a holding force caused by a suction flow frictionally or non-positively on the conveyor belt in question.
- the suction force is usually realized by a negative pressure acting on the respective sheet with reference to the surrounding barometric air pressure by means of a suction device.
- the suction belt table is arranged in a sheet-processing machine arrangement in the transport direction of the sheets after a dryer that dries the sheets.
- the dryer follows first a cooling section for air conditioning and/or conditioning of the sheets heated in the dryer, so that the suction belt table is only arranged after the cooling section.
- a machine arrangement of the aforementioned type, whether with or without a cooling section after the dryer, generally has a plurality of processing stations arranged one behind the other in the transport direction of the sheets, each acting on the sheets.
- B. is formed as a machine unit in this sheet-processing machine assembly.
- the suction belt table can be arranged immediately after the dryer, so that no further processing station is arranged between the named dryer and the suction belt table, or only after the cooling section formed after the dryer.
- at least the transport device of the dryer upstream of the suction belt table or of the associated cooling section is designed as a transport device that transports the sheets lying flat along a linear transport section.
- the dryer is thus designed in particular as a continuous dryer for sheets in a single layer.
- a further transport device downstream of the suction belt table in the transport direction of the sheets is designed as a transport device that transports the sheets along a curved, in particular arc-shaped transport path.
- This further transport device is preferably arranged immediately after the suction belt table, ie no further processing station is arranged between the suction belt table and the downstream transport device in the relevant machine arrangement.
- the sheets to be transported by this machine arrangement thus change from a linear transport path to a curved transport path, in particular in the form of a circular arc.
- a change from a linear transport path to a curved transport path, in particular a transport path in the form of a circular arc is sometimes very difficult on a suction belt table problematic.
- DE 102016207397 A1 discloses a sheet-processing machine arrangement with a suction belt table arranged after a dryer that dries the sheets.
- DE 102018201 921 A1 discloses a sheet-fed offset printing machine with a plurality of processing stations that transport sheets linearly, with each of the processing stations having a suction belt table.
- DE 101 46919 C1 discloses a leading edge stop as a catching device, with this catching device catching and stacking sheets.
- DE 601 19405 T2 discloses a sheet output unit with the following features: a tray that accepts paper; a transfer passage for transferring a sheet of pretreated paper to the paper receiving tray along a sheet transfer direction; guide holes formed on both sides of the transfer passage; a transfer member located in the transfer passage to transmit a force to the pretreated paper sheet to move the pretreated paper sheet in the sheet transfer direction; jumping wings arranged in the guide openings and having convex and concave portions arranged alternately in a direction substantially perpendicular to the sheet transfer direction such that the convex segments guide the sheet of pretreated paper and the concave recesses are out of contact with the sheet of prepared paper; and an operating member that operates the jumping wings between a guide position where the jumping wings are respectively projected upward from the guide openings and a waiting position where the jumping wings are respectively retracted into the guide openings with each of the convex segments substantially in the sheet transfer direction, and is angled either outwardly or inwardly therefrom, by a given angle with respect to the sheet transfer
- DE 102016207406 A1 discloses a transport device for the sequential transport of individual sheet-like substrates along a predetermined path, with a guiding surface aligned parallel to the substrate path, the sheet-like substrate in question being arranged on or above the guiding surface during transport, with at least one nozzle is arranged, wherein the nozzle in question has at least one opening for an air flow passing through it, wherein a length of the opening in question running in or parallel to the guide surface is greater than its height perpendicular to the guide surface, this height and/or length respectively is or are variable and/or infinitely adjustable, the nozzle in question being designed as a blow-suction nozzle, the respective blow-suction nozzle having two operating modes, the operating modes of the blow-suction nozzle in question their blowing operation and their suction operation are, with jew Because one of these operating modes can be set or at least adjusted by a control unit, with the height and/or length being set or at least adjustable by the control unit in such a way that the opening in question is
- B. is designed as a Venturi nozzle, wherein the Venturi nozzle is arranged sucking a side portion of the relevant substrate to be transported by a negative pressure in the direction of the guide surface and wherein a blowing direction of the respective blow-suction nozzle z. B. is directed obliquely outwards in the transport direction of the relevant substrate to be transported at an angle starting from the transport direction in a range of 30° to 60°.
- the object of the invention is to provide a machine arrangement with several to create processing stations that process sheet-shaped substrates, with a suction belt table being provided, with individual substrates following one another in a sequence being able to be caught and stacked on the suction belt table before they are transferred to a transport device downstream of the suction belt table.
- the catching device can be used to catch and stack sheet-shaped substrates on the suction belt table before they are transferred to a transport device downstream of the suction belt table. Further advantages can be seen from the following description.
- FIG. 1 shows a suction belt table in a sheet-processing machine arrangement
- FIG. 2 shows a side view of the suction belt table according to FIG. 1;
- FIG. 3 is a plan view of the suction belt table shown in FIG. 2;
- FIG. 4 shows a side view of a catching device integrated into the suction belt table
- FIG. 5 shows the catching device of FIG. 4 in its parking position
- FIG. FIG. 6 shows the catching device of FIG. 4 in its catching position
- FIG. 7 shows a detail from FIG. 2 with the catching device in its catching position
- FIG. 11 shows a diagram of the acceleration of the cylinder piston during operation of the catching device
- Fig. 13 is a schematic representation of a circuit for canceling a
- FIG. 14 shows a detail from the suction belt table shown in FIG. 3 in a plan view
- 15 shows a guide device between two conveyor belts arranged one after the other in the transport direction of the sheets; 16 shows an initial situation for the function of the guide device;
- FIG. 20 shows a section of the plan view shown in FIG. 3 of the suction belt table with a nozzle arrangement
- FIG. 21 shows a detail from the side view of the suction belt table shown in FIG.
- FIG. Such a machine arrangement is z. B. known from the mentioned DE 102016207397 A1.
- the machine arrangement selected as an example for processing sheets has, viewed in the transport direction T of the sheets, first a sheet feeder 01, in which a first stack 02 of sheets is ready for processing.
- the sheets are preferably rectangular substrates of paper, card or paperboard. Paper, cardboard and cardboard differ in their respective grammage, ie the weight in grams for one square meter of these sheets. Paper has a basis weight between 30 g/m 2 and 150 g/m 2 , cardboard has a basis weight between 150 g/m 2 and 600 g/m 2 and cardboard has a basis weight of more than 600 g/m 2 .
- the sheets can also each be a substrate made of a plastic and/or formed as a thin sheet.
- Sheet feeder 01 can also be embodied as a magazine feeder having a plurality of first stacks 02.
- a suction head 03 successively grips and guides each of the stacked sheets from above this bow z. B. by means of a first rocking gripper 04 and, if necessary, a transfer drum 34 interacting with the first rocking gripper 04 in a sequence of sheets separated from one another, e.g. g. to a first coating device 05, with this first coating device 05 e.g. B. is designed as a primer application device.
- the first coating device 05 has a z. B. designed as a pressure cylinder transport cylinder 06 and z. B.
- a printing unit cylinder 07 that interacts with this transport cylinder 06 and has an forme roller 08 that is or at least can be set against this printing unit cylinder 07, preferably in the form of an anilox roller, with at least one doctor blade being positioned in the axial direction of the forme roller 08 for optimal dosing of a coating material to be applied to the surface of the sheet 09 or a chamber doctor blade system 09 extends.
- Transport cylinder 06 transports the sheets held on its lateral surface along a curved transport path, in particular in the shape of a circular arc.
- the first coating device 05 carries the coating material, e.g. B. a primer either over the entire surface or only at certain, ie at predetermined locations, ie partially.
- the sheets are then transported by the transport cylinder 06 of the first coating device 05, e.g. B. by means of a first gripper system 11, in particular a first chain conveyor, and z. B. at least one first conveyor belt 12 is transferred to a non-impact printing device 13, with the first gripper system 11 and the first conveyor belt 12 interacting when the sheets are transferred to the non-impact printing device 13 in such a way that the first gripper system 11 delivers the sheets to the first conveyor belt 12, which has a linear transport path, with the sheets being transferred to the non-impact printing device 13 from the first conveyor belt 12.
- the first conveyor belt 12 is preferably designed as a circulating endless belt.
- a first dryer 14 is provided in the area of the first gripper system 11, which dries the sheets that have been coated in the first coating unit 05.
- B. is designed as a hot air dryer and / or as a drying by IR radiation or UV radiation dryer.
- the non-impact printing device 13 usually has at least four inkjet printing devices that can be controlled independently of one another, each of these inkjet printing devices for creating a preferably multicolored print image applying a different printing color to the z. B. previously coated in the first coating device 05 side of the sheet.
- the non-impact printing device 13 preferably has a second conveyor belt 16, so that the sheets are printed by the inkjet printing devices while they are lying on this second conveyor belt 16.
- the second conveyor belt 16 is preferably designed as a circulating endless belt. However, several such. B. on two in the transport direction T of the sheets arranged parallel to each other conveyor belts 16 may be provided.
- a second dryer 17 drying the printed sheets is arranged downstream of the non-impact printing device 13 in the transport direction T of the sheets. B. is designed as a hot air dryer and / or as a drying by IR radiation or UV radiation dryer.
- the second dryer 17 has a transport device 18 which transports the sheets horizontally in a translatory manner, ie along a linear transport path.
- This transport device 18 is designed as a third transport belt 18 in the machine arrangement shown as an example in FIG. 1 .
- the third conveyor belt 18 is also preferably designed as a circulating endless belt.
- the transport device 18 of the second dryer 17 in this example transfers the dried sheets to a suction belt table 19, from which the sheets z. B. be transferred to a second coating device 22 by means of a second oscillating gripper 21 and optionally a transfer drum 33 cooperating with the second oscillating gripper 21 .
- the second coating device 22 is z. B. designed as a painting device, said second coating device 22 a coating material, z. B. applies a varnish in particular to a print image previously created in the non-impact printing device 13 .
- the second coating device 22 assigns as a transport device for transporting sheet turn a z. B. designed as a pressure cylinder transport cylinder 23, with this transport cylinder 23 z. B.
- a printing unit cylinder 24 interacts with an applicator roller 26 that is or at least can be positioned on this printing unit cylinder 24, preferably in the form of an anilox roller, with at least one doctor blade 27 or a chamber doctor blade system 27 extending in the axial direction of the applicator roller 26.
- the sheets are then from the transport cylinder 23 of the second coating device 22 z. B. by means of a second gripper system 28, in particular a second chain conveyor, to a delivery 29, the sheets processed in this machine arrangement described as an example being deposited by the second gripper system 28 in the delivery, preferably in a second stack 32.
- a third dryer 31 drying the sheets coated in the second coating device 22 is provided in the area of the second gripper system 28.
- B. is designed as a hot air dryer and / or as a drying by IR radiation or UV radiation dryer.
- the delivery 29 can also be embodied as a multi-stack delivery having a plurality of second stacks 32 .
- the machine arrangement shown as an example in FIG. 1 is designed as a digital printing machine for use in an industrial printing process, in particular for producing printed products in mass production.
- Fig. 2 shows a side view of the suction belt table 19 as z. B. is arranged in a machine arrangement according to FIG.
- the transport direction T of the sheets is directed from right to left in FIG. So the suction belt table 19 individual sheets are sequentially from a in Fig. 2 only partially shown transport device 18 with a transport speed of several thousand sheets per hour, z. B. of about 10,000 sheets per hour.
- z. B. of about 10,000 sheets per hour.
- This gap is significantly smaller than a length of the sheets extending in the transport direction T of the sheets and is only a few millimeters, e.g. B. about 20 mm.
- the transport device 18 arranged upstream of the suction belt table 19 in the transport direction T of the sheets belongs to a dryer 17, with this dryer 17 being a second dryer 17 in accordance with the machine arrangement shown by way of example in Fig. 1, with the sheets being transported by this transport device 18 lying, in particular lying on a conveyor belt, in each case translationally, ie transported along a linear transport route.
- the suction belt table 19 initially accepts each individual sheet in a conveying plane defined by the transport device 18 upstream of this suction belt table 19 and conceptually extended in the transport direction T of the sheets, with this conveying plane preferably being aligned horizontally.
- the conveying plane E19 (Fig.
- each sheet strikes with its leading edge in the transport direction T against front lays 36 of the oscillating gripper 21 arranged downstream of the suction belt table 19, this oscillating gripper 21 being a second oscillating gripper 21 in the machine arrangement shown as an example in Fig. 1 .
- Each sheet is transferred individually from this swing gripper 21 to a transfer drum 33 that interacts with this swing gripper 21 .
- the sheets are fully decelerated at the front lays and aligned in register.
- the suction belt table 19 has a shingling device for sheets to be transported.
- the shingling device has above the conveying plane E19 of the suction belt table 19, preferably over the entire width of the sheet, ie transverse to the transport direction T of the sheets extending box-shaped housing, the so-called blower box 37, wherein in the blower box 37 on its side facing the conveying plane E19 of the suction belt table 19 in the transport direction T of the sheet several blower nozzles are arranged one behind the other.
- at least two rows of a plurality of blowing nozzles arranged next to one another are arranged one behind the other in the transport direction T of the sheets and in each case transversely to the transport direction T of the sheets.
- a respective blowing direction of the blowing nozzles is directed essentially parallel to the conveying plane E19 of the suction belt table 19 against the transport direction T of the sheets.
- the blowing direction of the blowing nozzles is z. B. determined by at least one channeling the flow of the blown air, each arranged and / or formed on the blow nozzle in question.
- the respective guide surface is on the side of the blow box 37 facing the conveying plane E19 of the suction belt table 19, e.g. B. as a projecting from this blow box 37 ramp.
- a blowing air flowing out of the respective blowing nozzles is preferably controlled by adjustable pneumatic valves, e.g. B. controlled in time and / or in intensity, the valves z. B.
- valves are or are controlled by a preferably digital control unit 71 processing a program.
- the valves are z. B. by the control unit 71 switched in particular in a cycle, wherein a cycle time and / or a clock frequency is preferably set depending on the feed of the suction belt table 19 fed sheet or are.
- Valves controlled in a cycle by a preferably digital control unit 71 are also referred to as cycle valves.
- a partition plate 38 is arranged in an area between the conveying plane E19 of the suction belt table 19 and the side of the blower box 37 facing this conveying plane E19 in front of the first blower nozzle or the first blower nozzle row, with the partition plate 38 covering the leading edge of a subsequent sheet, i.e of a sheet that directly follows a sheet lifted by the blast air from at least one of the blast nozzles of the blow box 37, against that of the sheets in the blow box 37 arranged blow nozzles shields caused suction.
- the sheet lifted by at least one of the blower nozzles or rows of blower nozzles of blower box 37 from the conveying plane E19 of suction belt table 19 channels the blower air flowing out of the at least one blower nozzle of blower box 37 and directs this blower air over the surface of partition plate 38 facing blower box 37.
- the partition plate 38 preferably has a concave curvature at its end located in the blowing direction, this curvature giving the blowing air an outflow direction away from the conveying plane E19 of the suction belt table 19, ie directed away.
- the front edge of a sheet that directly follows a sheet lifted by the blown air from at least one of the blower nozzles remains unaffected by the partition plate 38 until the lifted sheet, due to its own progression of movement or feed in the transport direction T, with its rear end blow nozzle or blow nozzle row that was reached first in this sheet in its transport direction T.
- the blast air of the relevant Blowing nozzle or row of blowing nozzles is switched off by means of the associated valve depending on the movement progress or feed of the sheet currently being lifted from the conveying plane E19 of the suction belt table 19 and directly preceding a sheet located between the partition plate 38 and the conveying plane E19 of the suction belt table 19.
- a sheet raised by the blast nozzles or rows of blast nozzles is due to the suction effect caused by the respective blast air (Venturi effect) above the conveying plane E19 of the suction belt table 19 in a certain, e.g. B. by a distance from the side of the blower box 37 facing the conveying plane E19 of the suction belt table 19 Transport speed of the sheet in question is dependent.
- a plurality of openings 39 are preferably provided at least in an area opposite the blower box 37, through which air flows under the currently lifted sheet to equalize the pressure.
- These openings 39 are z. B. circular with a diameter in the range of a few millimeters.
- suction chambers 41 that can be controlled in terms of their respective fluidic effect.
- These suction chambers 41 are preferably arranged one behind the other in the transport direction T of the sheets and z. B. by means of a controlled by the control unit 71 suction device in particular individually and independently switchable in their respective pressure.
- FIG. 3 shows the suction belt table 19 shown in FIG. 2 in a plan view.
- the transport direction T of the sheets is directed from right to left, as in FIG.
- individual sheets are sequentially fed to the suction belt table 19 by a transport device that transports the sheets in a translatory manner, in particular by a transport device belonging to a dryer 17 .
- the sheets are each at least on a conveyor belt 18, preferably on several, z. B. on two conveyor belts 18 arranged parallel to one another in the transport direction T of the sheets on.
- These conveyor belts 18 are each z. B. as endlessly circulating flat bands or flat belts.
- a guide device 42 Arranged at the transition from the transport device upstream of the suction belt table 19 to this suction belt table 19 is a guide device 42 which extends transversely to the transport direction T of the sheets and preferably has a plurality of lifting nozzles 43 arranged in at least one row.
- at least one transfer belt 44 In the transport direction T of the sheets then follows at least one transfer belt 44, which z. B. as a arranged in the central region of the conveying plane E19 of the suction belt table 19 circulating flat belt and also preferably as a suction belt, wherein the suction belt at least partially has a perforation.
- the distance between the creases 46; 47 preferably spanning two ramp belts 48 arranged parallel to one another in the transport direction T of the sheets, e.g. B. in the form of encircling preferably each configured as a suction belt endless belts.
- the chute belts 48 are pivotably mounted at their rear end in the transport direction T of the sheets, which is thus reached first by a sheet brought in particular by the transfer belt 44, so that these chute belts 48 are inclined upwards at an acute angle opening in the transport direction T of the sheets from the previous conveying level E19 of the suction belt table 19 can be swung out and, in their exposed operating state, form an erected ramp for the sheets to be transported.
- the chute belts 48 are shown in their normal operating state, ie in their operating state that is not pivoted out and is preferably flush with the remaining conveying plane E19 of the suction belt table 19 .
- nozzles 49 are arranged at least in the respective longitudinal edge areas of the area of the conveying plane E19 of the suction belt table 19 spanned by the jump belts 48.
- This arrangement of the Venturi nozzles begins in the transport direction T of the sheets at a distance z. B. less than 200 mm, preferably less than 100 mm behind the at least one siphon nozzle 43.
- a catcher blower 51 extending transversely to the transport direction T of the sheets (Figs. 2 and 3), with this catcher blower 51 having a plurality of blower nozzles which are arranged in a manner across the entire width B19 of the Conveying level E19 of the suction belt table 19 extending row are arranged.
- the suction bores 53 in the switching area 52 form and open up a fluidic connection to at least one of the preferably several suction chambers 41 arranged below the conveying plane E19 of the suction belt table 19, wherein these suction chambers 41 are switched or at least can be switched in their respective pressure by the control unit 71, in particular individually and independently of one another, so that in this switching area 52 by means of the suction bores 53 and by the respective setting of the Pressure in the relevant suction chamber 41 in the conveying plane E19 of the suction belt table 19 is set or at least adjustable.
- the arranged in the switching area 52 suction holes 53 are z. B. symmetrically to the center line M of the conveying plane E19 des Suction belt table 19 in several, e.g. B.
- the sheet follows the switching area 52, e.g. B. overlapping with the switching area 52 at least one feed belt 54 designed in particular as a suction belt, wherein the suction belt has a perforation at least in sections, wherein the at least one feed belt 54 extends in the transport direction T of the sheets preferably to below the blower box 37 of the shingling device.
- the at least one feed belt 54 is preferably designed as a circulating endless belt.
- z. B. symmetrically to the center line M of the conveying plane E19 of the suction belt table 19 several, z. B. two feed belts 54 are provided.
- the sheets follow the at least one feed belt 54 and/or the shingling device in the conveying plane E19 of the suction belt table 19, e.g. B. arranged symmetrically to the center line M preferably each as a circulating endless belt trained braking belts 56, which have the function of reducing the respective transport speed of the sheet before they are transferred to a suction belt table 19 immediately downstream transport device, z. B. to a swing gripper 21 to reduce.
- the sheets which are preferably reduced in terms of their respective transport speed, are then gripped as they continue to move in the transport direction T by a rotating or at least rotatable suction roller 57 to which vacuum is applied by a suction device, with this suction roller 57 moving transversely to the transport direction T of the Arch preferably extends at least over the entire width of the arch or over the entire width B19 of the suction belt table 19. Then each of the sheets is successively and individually held by the suction roller 57 with its front edge in the transport direction T, ie its front edge z. B. to the front lays 36 of the swinging gripper 21 immediately downstream of the suction belt table 19.
- the sheets that were previously transported individually lying one behind the other, each with a gap to one another, are transported transferred into an imbricated stream before these sheets to a suction belt table 19 immediately downstream transport device, z. B. to a swing gripper 21, to then be transferred to a suction belt table 19 having this z. B. designed as a digital printing machine machine assembly rotating to a coating device 22, z. B. to be transported to a coating device 22 designed as a painting device and through it.
- a suction belt table 19 with a catching device 58 is therefore proposed, with which catching device 58 forwards individual sheets following one another in a sequence be caught and stacked on the suction belt table 19 before they are transferred to a transport device arranged downstream of the suction belt table 19 .
- this suction belt table 19, which preferably has a shingling device, is arranged in the transport direction T of the sheets after a dryer 17 that is arranged downstream of a non-impact printing device 13.
- the suction belt table 19 is arranged in a machine arrangement at a point at which the sheets are transferred from a linear transport path arranged directly upstream of this suction belt table 19 to a curved, in particular arc-shaped, transport path arranged immediately downstream of this suction belt table 19.
- the proposed catching device 58 has a slider-crank mechanism whose coupler has at least one stop surface 66 for the sheets to be caught. Details of the catching device 58 and how it works are described below with reference to FIGS.
- Fig. 4 shows an example of a side view of the catching device 58.
- this catching device 58 is arranged below the conveying plane E19 of the suction belt table 19, preferably approximately one in the transport direction T of the Arc extending arc length from a line drawn from the catcher blower 51 perpendicularly to the conveying plane E19 of the suction belt table 19 corresponding to the distance A51 at the end of the switching area 52 of this suction belt table 19 having suction bores 53.
- the catcher device 58 has a drive 59, which is preferably a double-acting Pneumatic cylinder 81 is formed, the cylinder piston 82 can be acted upon on both sides with compressed air (Fig. 8).
- a bidirectional, linearly movable piston rod 61 of the pneumatic cylinder 81 is connected to a crank 62 designed as an angle lever, forming a pivot point G61, the crank 62 being rotatably mounted in a pivot point D62 fixedly arranged in the suction belt table 19.
- the Crank 62 designed as an angle lever has a short lever and a longer lever compared to this short lever, the short lever connecting the pivot point G61, at which the piston rod 61 of the pneumatic cylinder 81 is connected to the crank 62, to the pivot point D62 of the crank 62 connects.
- the crank 62 is in turn connected to a coupler 63, forming a pivot point G62.
- the longer lever of the crank 62 extends between its pivot point D62 and the pivot point G62, at which the crank 62 is connected to the coupling 63.
- the coupling 63 and the crank 62 driving the coupling 63 form a slider crank mechanism in their interaction, with an end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 being bidirectionally linearly movable along a path 64 arranged parallel to the conveying plane E19 of the suction belt table 19.
- the end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 and the pivot point D62 of the crank 62 consequently lie on a straight line G64 connecting them with one another, this straight line G64 running parallel to the conveying plane E19 of the suction belt table 19 .
- the coupler 63 has at least one stop surface 66 for sheets to be caught in a region between its end point E1 facing the drive 59 of the catching device 58 and the pivot point G62 at which the crank 62 is connected to the coupler 63 .
- the stop surface 66 in question is thus preferably a component of the coupler 63.
- the stop surface 66 in question is preferably made of a plastic, e.g. B. from a polyamide (abbreviation PA) or from a thermoplastic material such as. B. polyoxymethylene (abbreviation POM).
- the slider-crank mechanism has a central slider-crank, which means that the three sections G62-D62, G62-E2 and G62-E1 shown in FIG. 4 are each of the same length and the end points E1; E2 of the coupler 63 together with the articulation point G62 arranged between them all on one end point E1; E2 of the coupler 63 connecting straight lines G63.
- the short lever and the longer lever of the crank 62 have a length ratio to one another such that they accelerate a movement triggered by the drive 59 of the catching device 58 and acting on the coupler 63 .
- FIGS. 2 and 5 show the capture device 58 in its inactive, i. H. unactuated starting position or parking position, in which the at least one stop surface 66 formed on the coupling 63 is arranged below the conveying plane E19 of the suction belt table 19.
- the sheets can thus pass the suction belt table 19 unhindered in its conveying plane E19, which is indicated in FIG. 5 by two consecutive directional arrows.
- the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is extended by a corresponding loading of this pneumatic cylinder 81 with compressed air and the end point E2 of the coupling 63 facing away from the drive 59 of the catching device 58 takes on the Web 64 its farthest from the drive 59 of the catching device 58 location.
- the catching device 58 in its catching position.
- the at least one stop surface 66 which is preferably formed on the coupler 63, pierces through a corresponding, e.g. B. slot-shaped opening 67 (Fig. 3) the conveying plane E19 of the suction belt table 19 and is set up by a pivoting movement from a previously inclined position at a preferably acute angle to the conveying plane E19 of the suction belt table 19, preferably perpendicular to this conveying plane E19 (Fig. 6 and 7) so that sheets transported on the suction belt table 19 are pressed against the at least one erected, e.g. B.
- the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted by a corresponding loading of this pneumatic cylinder 81 with compressed air and the end point E2 of the coupler 63 facing away from the drive 59 of the catching device 58 takes its path 64 to the drive 59 the catching device 58 next layer.
- Fig. 7 shows a detail from Fig. 2 with chute belts 48, which are shown in their operating state from the previous conveying plane E19 of the suction belt table 19 at an acute angle opening in the transport direction T of the sheets, and with a z. B. by the control unit 71 activated catch blower 51, the activation of which is indicated in FIG.
- the transport speed of the sheet can be reduced by the Catching device 58 in the transport direction T of the sheet upstream transport devices reduce their respective transport speed. Even if the transport speed of a transport device arranged upstream of the catching device 58 in the transport direction T of the sheets is not reduced immediately when the catching device 58 is actuated, e.g. B.
- the negative pressure set in the relevant suction chamber 41 by means of a suction device 72 controlled by the control unit 71 is switched off in any case, with this suction chamber 41 being 19 formed suction bores 53 is fluidically connected to the relevant switching area 52 and at least partially overlaps with a floor plan of the stack to be formed of the sheets to be caught.
- the at least one stop surface 66 of the catching device 58 is then shot into a sheet gap between the trailing edge of a preceding sheet and a leading edge of a first subsequent sheet to be caught.
- control unit 71 actuates at least one pneumatic switching valve 86, preferably two pneumatic switching valves 86 at the same time; 87, so that the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted.
- this pneumatic cylinder 81 has a bottom chamber 68 and a bearing chamber 69 separated from the bottom chamber 68 by a cylinder piston 82 fixedly connected to the piston rod 61, with a first pneumatic switching valve 86 being connected to the bottom chamber 68 and a second pneumatic switching valve 87 to the Storage chamber 69 is connected. These two switching valves 86; 87 are each controlled by the control unit 71 of the catching device 58 .
- the bottom chamber 68 can have barometric pressure.
- the bottom chamber 68 can have a differential pressure that is greater than the barometric pressure and less than the pressure in the storage chamber 69 .
- the piston rod 61 of the drive 59 of the catching device 58 forming pneumatic cylinder 81 by pressurizing the bearing chamber 69 z. B. retracted with 7 bar.
- the cylinder piston 82 of the pneumatic cylinder works in this retraction of the piston rod 61 of the pneumatic cylinder 81 against in the bottom chamber 68 z. B. with 2 bar prestressed compressed air that can escape throttled via the open pneumatic switching valve 86 of the bottom chamber 68 and optionally via a subsequent throttle valve 91.
- the proposed slider-crank mechanism it is possible to achieve the at least one stop surface 66 of the catching device 58 even at a high transport speed of the sheets of several thousand sheets per hour, z. B. of about 10,000 sheets per hour by a z. B. only about 20 mm measuring sheet gap to bring through into the catch position.
- the response time that can be achieved with the proposed slider-crank mechanism thus clearly surpasses the switching times of simple folding and/or sliding mechanisms, the z. B. of switching magnets or directly, d. H. are driven gearlessly by a pneumatic cylinder 81.
- a further advantage of the solution found is that the proposed slider-crank mechanism is designed to be comparatively simple and space-saving.
- a suction belt table 19 is arranged downstream along a transport device 18 transporting a linear transport path, the suction belt table 19 having a catching device 58 with a catching position assumed as a result of an actuation for individual sheets following one another in a sequence, with the catching device 58 in its catching position being separated from that transport device 18 which the sheets are transported lying along a linear transport path and are arranged upstream of the suction belt table 19, sheets fed to the suction belt table 19 before a respective transfer e to a suction belt table 19 downstream transport device on the suction belt table 19 catches and stacks.
- a control unit 71 provided for the suction belt table 19 actuates the catching device 58 as a function of a malfunction occurring in a processing station downstream of the suction belt table 19 in such a way that the catching device 58 assumes its catching position.
- the suction belt table 19 is also preferably arranged in front of a processing station designed as a coating device 22, in particular as a painting device.
- Coating device 22 has a transport cylinder 23 in particular as the transport device for sheets to be transported, with this transport cylinder 23 preferably a printing unit cylinder 24 interacting with an applicator roller 26 that is or at least can be thrown onto this printing unit cylinder 24, with at least one squeegee moving in the axial direction of applicator roller 26 27 or a chamber doctor blade system 27 extends.
- This machine arrangement is the bow with a Transport speed preferably configured to transport several thousand sheets per hour, in particular about 10,000 sheets per hour.
- the transport device 18 upstream of the suction belt table 19, which transports the sheets lying flat along a linear transport path, is designed to transport the individual sheets that follow one another directly in a sequence, each with a sheet gap of preferably about 20 mm.
- a suction belt table 19 for sheet-like substrates to be transported lying individually with the suction belt table 19 being arranged between a transport device arranged upstream in the transport direction T of the substrates and a correspondingly arranged downstream transport device, with the suction belt table 19 having a catching device 58 with a catching position assumed as a result of its actuation for individual substrates that follow one another in a sequence, with the catching device 58 in its catching position catching substrates fed to the suction belt table 19 from the upstream transport device before they are transferred to the transport device arranged downstream of the suction belt table 19 on the suction belt table 19, i.e. on a point directed in the transport direction T Movement progression hinders and preferably stacks.
- the transport device upstream of the suction belt table 19 has a translatory transport path for the sheet-shaped substrates to be transported lying individually and/or the transport device arranged downstream of the suction belt table 19 has a rotary transport path or a translatory transport path for the sheet-shaped substrates to be transported.
- a control unit 71 in particular digital, is provided, this control unit 71 actuating the catching device 58 depending on a disturbance that has occurred along the transport route belonging to the transport device downstream of the suction belt table 19 in such a way that the catching device 58 assumes its catching position.
- the catching device 58 has at least one pivotable abutment surface 66 for substrates to be caught, the stop surface 66 in question in the of the control unit 71 is arranged below a conveying plane E19 of the suction belt table 19 in the inactive state of the catching device 58 and when the catching device 58 is in the actuated state of the control unit 71, it is pivoted through an opening 67 in the conveying plane E19 of the suction belt table 19 and positioned perpendicular to this conveying plane E19, so that on The substrates transported on the suction belt table 19 collide against the at least one stop surface 66 that is set up and protrudes from the conveying plane E19 of the suction belt table 19 .
- the catching device 58 has a slider-crank mechanism, the slider-crank mechanism having a coupling 63 and a crank 62 interacting with the coupling 63 , the crank 62 being driven by a drive 59 .
- the crank 62 is rotatably mounted in a pivot point D62 fixed in the suction belt table 19, with the crank 62 being designed as an angled lever and having a short lever and a lever which is longer than this short lever, the short lever having a pivot point G61, at which the drive 59 acts on the crank 62, to the pivot point D62 of the crank 62, with the longer lever of the crank 62 extending between its pivot point D62 and a pivot point G62, at which the crank 62 is connected to the coupling 63.
- the length ratio of the short lever and the longer lever of the crank 62 to one another is such that they increase the speed of a movement acting on the coupler 63 from the drive 59 of the catching device 58 .
- the speed-up ratio i is preferably at least 1:5.
- An end point E2 of the coupler 63 facing away from the drive 59 of the catching device 58 can be moved linearly and bidirectionally along a path 64 arranged parallel to the conveying plane E19 of the suction belt table 19, with the end point E2 facing away from the drive 59 of the catching device 58 being the coupler 63 and the pivot point D62 of the crank 62 are arranged on a straight line G64 connecting these two points with one another, this straight line G64 running parallel to the conveying plane E19 of the suction belt table 19.
- the at least one stop surface 66 for substrates to be caught is in a region between an end point E1 of the coupling 63 facing the drive 59 of the catching device 58 and the pivot point G62, at which the crank 62 is connected to the coupling 63 is connected, trained.
- the slider crank mechanism preferably has a central slider crank, in which the three routes G62-D62; G62-E2; G62-E1 are each of the same length and the end points E1; E2 of the coupler 63 together with the articulation point G62 arranged between them all on one end point E1; E2 of the coupling 63 connecting straight lines G63 are arranged.
- the drive 59 of the catching device 58 is advantageously designed as a double-acting pneumatic cylinder 81, this pneumatic cylinder 81 having a bottom chamber 68 and a bearing chamber 69 separated from the bottom chamber 68 by a cylinder piston 82 firmly connected to its piston rod 61.
- the bearing chamber 69 is arranged at that end of the pneumatic cylinder 81 which faces the pivot point G61 at which the drive 59 acts on the crank 62 .
- the floor chamber 68 is arranged at that end of the pneumatic cylinder 81 which faces away from the pivot point G61, at which the drive 59 acts on the crank 62.
- a first pneumatic switching valve 86 is connected to the bottom chamber 68 and a second pneumatic switching valve 87 is connected to the storage chamber 69, these two switching valves 86; 87 are each controlled by the control unit 71 of the catching device 58 .
- the bottom chamber 68 either has barometric pressure or the bottom chamber 68 has a differential pressure greater than the barometric pressure and less than the pressure in the storage chamber 69 .
- the piston rod 61 of the pneumatic cylinder 81 is compressed by pressurizing the bearing chamber 69 z. B. retracted with 7 bar.
- the cylinder piston 82 of the pneumatic cylinder 81 works against the retraction of the piston rod 61 of the pneumatic cylinder 81 in the bottom chamber 68 z. B. compressed air prestressed at 2 bar, this compressed air being provided from a compressed air source 93 connected to the bottom chamber 68 .
- suction belt table 19 for horizontally transporting individual sheet-like substrates in a conveying plane E19, with the suction belt table 19 having a catching device 58 and at least one chute belt 48, with the catching device 58 and the at least one chute belt 48 each being controlled by a controlled by control unit 71 are designed to assume one of two different operating states, with the first operating state being an inactive operating state and the second operating state being an activated operating state with respect to the safety device 58 and the at least one ski jump tape 48, with the safety device 58 being in its activated state state has at least one stop surface 66 for substrates to be caught, which is set up perpendicularly to the conveying plane E19 of the suction belt table 19, the at least one jump belt 48 being in front of the at least one perpendicular to the conveying plane E19 in the transport direction T of the substrates by at least one substrate length extending in the transport direction T of the substrates of the suction belt table 19 is arranged stop surface 66, wherein the at least one
- the suction belt table 19 is arranged between a transport device arranged upstream in the transport direction T of the substrates and a correspondingly arranged downstream transport device, the transport device arranged upstream of the suction belt table 19 having a translational transport path for the sheet-shaped substrates to be transported lying individually and/or the transport device arranged downstream of the suction belt table 19 having a has a rotary transport path or a translatory transport path for the sheet-shaped substrates to be transported.
- a catch blower 51 with a plurality of blower nozzles arranged in a row extending transversely to the transport direction T of the substrates, the catch blower 51 blowing air from its blower nozzles z. B. perpendicular in the direction of the conveying level E19 des Suction belt table 19 blows.
- the control unit 71 actuates the catching device 58 depending on a disruption that has occurred along the transport route belonging to the transport device downstream of the suction belt table 19 in such a way that the catching device 58 sets up its at least one stop surface 66 for substrates to be caught perpendicularly to the conveying plane E19 of the suction belt table 19 and/or this control unit 71 actuates the at least one take-off belt 48 as a function of the disruption that has occurred along the transport route belonging to the transport device downstream of the suction belt table 19 in such a way that the at least one take-off belt 48 is pivoted obliquely upwards at the acute angle out of the conveying plane E19 of the suction belt table 19 and/or this control unit 71 actuates the blower 51 depending on the disruption that has occurred along the transport route belonging to the transport device downstream of the suction belt table 19 in such a way that the blower 5 1 blast air blows out of its blast nozzles in the direction of the conveying plane E19 of the suction belt table
- the suction belt table 19 is preferably designed such that a blower box 37 of a shingling device belonging to the suction belt table 19 is arranged after the catching device 58 in the transport direction T of the substrates after the catching device 58 above the conveying plane E19 of the suction belt table 19 .
- a blower box 37 of a shingling device belonging to the suction belt table 19 is arranged after the catching device 58 in the transport direction T of the substrates after the catching device 58 above the conveying plane E19 of the suction belt table 19 .
- e.g. B arranged transversely to the transport direction T of the substrates extending guide 42 with a plurality of lifting nozzles 43.
- At least one suction chamber 41 is arranged, wherein the respective suction chamber 41 is set or at least adjustable in its respective pressure by the control unit 71, wherein the control unit 71 by in the Conveying level E19 of the suction belt table 19 formed suction holes 53 to the relevant suction chamber 41 in the conveying plane E19 of the suction belt table 19 a negative pressure is set or at least adjustable.
- the negative pressure set in the conveying plane E19 of the suction belt table 19 by means of the suction chamber 41 is switched off in the event of a fault occurring along the transport path belonging to the transport device downstream of the suction belt table 19 .
- the control unit 71 is preferably designed in such a way that it reduces a transport speed of the substrates at least in the transport device arranged upstream of the catching device 58 in the transport direction T of the substrates.
- two parallel ramp belts 48 are provided in the transport direction T of the sheets in the form of circulating endless belts, with these two ramp belts 48 being arranged symmetrically to the center line M of the conveying plane E19 of the suction belt table 19.
- a pneumatic drive 59 controlled by the control unit 71 actuates the catching device 58 .
- z. B. of about 10,000 sheets per hour, and the relatively small gap of z. B.
- a cylinder piston 82 in a pneumatic cylinder 81 exerts such a large force impact on the inner cylinders as a result of the kinetic energy achieved Attacks of this pneumatic cylinder 81 from the fact that these attacks are worn out in a very short time and are thus destroyed.
- this pneumatic cylinder 81 has sufficient wear resistance in the use described and thus an operating life that is as unrestricted as possible.
- a pneumatic circuit be provided for the operation of the double-acting pneumatic cylinder 81 of the catching device 58, which controls the movement of the cylinder piston 82 in such a way that for the cylinder piston 82 in a first half of its stroke a positive acceleration and in a second half of its stroke following the first half a negative acceleration is set.
- This pneumatic cylinder 81 has a bottom chamber 68 and a bearing chamber 69 which is separated from the bottom chamber 68 by the cylinder piston 82 , the cylinder piston 82 being firmly connected to the piston rod 61 .
- the bearing chamber 69 is arranged at that end of the pneumatic cylinder 81 which faces the pivot point G61 at which the drive 59 acts on the crank 62 .
- the floor chamber 68 is arranged at that end of the pneumatic cylinder 81 which faces away from the pivot point G61, at which the drive 59 acts on the crank 62.
- the cylinder piston 82 preferably has an end position damping element 83; 84 on.
- the pneumatic circuit described in detail below is implemented by changing a dynamic pressure balance in the two chambers 68; 69 of the pneumatic cylinder 81 a controlled acceleration phase and a controlled braking phase over the entire stroke of the cylinder piston 82.
- the pneumatic circuit has a first pneumatic switching valve 86 and a second pneumatic switching valve 87, both switching valves 86; 87 are each actuated by the control unit 71, preferably electrically. Both switching valves 86; 87 are connected to their respective compressed air source 93 in one of their switching positions.
- Fig. 8 shows the operating position of the pneumatic cylinder 81 in which the piston rod 61 of the pneumatic cylinder 81 forming the drive 59 of the catching device 58 is retracted and the catching device 58 is thus activated, which means that the stop surface 66 of the catching device 58 is in the conveying plane E19 of the suction belt table 19 is set up.
- At least the switching valve 86 for the bottom chamber 68 is preferably preceded by a pressure reducer 88 in order to build up a defined initial back pressure in the bottom chamber 68 when the compressed air flows out.
- a pressure reducer 89 can also be connected upstream of the switching valve 87 for the bearing chamber 69 .
- the switching valve 86 of the bottom chamber 68 is followed by a throttle valve 91 in order to use this throttle valve 91, whose cross-section is preferably adjustable, to influence the outflow speed of the compressed air from the bottom chamber 68 and thus the dynamic pressure profile in the pneumatic cylinder 81 and thus the speed of the cylinder piston 82. It can e.g.
- a throttle valve 92 is also arranged in the air outlet from the bearing chamber 69 of the pneumatic cylinder 81 in order to limit the speed of the cylinder piston 82 .
- the throttle valve 91 of the bottom chamber 68 and optionally the throttle valve 92 of the bearing chamber 69 are only when compressed air flows out of the respective chamber 68; 69 harnessed into the atmosphere.
- the bearing chamber 69 of the pneumatic cylinder 81 is preferably depressurized, ie there is a pressure z. B. equal to the barometric pressure.
- the bearing chamber 69 of the pneumatic cylinder 81 is subjected to a pressure greater than the barometric pressure, e.g. B. with a pressure that corresponds to the pressure in the bottom chamber 68, so preferably with a pressure z. B. from 2 bar. If in both chambers 68; 69 set pressure is the same, the cylinder piston 82 held in a stable end position. In the compressed air z. B.
- the storage chamber 69 is from its compressed air source 93 with compressed air at more than 5 bar, in particular at a pressure of z. B. 7 bar and the air in the bottom chamber 68, which is prestressed at approx.
- the described pneumatic circuit and the setting values for the pressure mentioned by way of example make it possible to bring the at least one stop surface 66 of the catching device 58 into a catching position through the already mentioned very narrow sheet gap, even at the already mentioned high transport speed of the sheets.
- high shock loads and peak loads are avoided by the solution shown in the entire kinematic system. Because the clamped air column, which dampens the drive movement of the cylinder piston 82 at the end, particularly in the bottom chamber 68, effectively prevents the cylinder bottom from being destroyed.
- a safe end position of the cylinder piston 82 in its retracted state is achieved without additional mechanical elements and thus without additional costs.
- the reduction in pressure in the storage chamber 69 also saves energy and reduces any leakage.
- Figs. 9 to 12 illustrate again by way of example in a diagram over the time t plotted on the abscissa the dynamic behavior of some physical variables with reference to the cylinder piston 82 of the pneumatic cylinder 81 during a switching process when the catching device 58 of the suction belt table 19 in question is actuated in particular is shifted from its home position to its catch position by a control signal from the control unit 71.
- Fig. 9 shows a change in position of the cylinder piston 82 between its two end positions in the pneumatic cylinder 81. A travel z and thus the stroke of the cylinder piston 82 is z. B. shown with 10 mm.
- Fig. 10 shows an example of the speed v of the cylinder piston 82 during its movement along the travel z.
- FIG. 11 shows an example of the associated acceleration a, with which the cylinder piston 82 executes its movement along the adjustment path z.
- the piston force F exerted by the cylinder piston 82 is then shown as an example in FIG. 12 .
- a suction belt table 19 for horizontally transporting individual sheet-like substrates in a conveying plane E19, with the suction belt table 19 having a catching device 58 with at least one stop surface 66 for substrates to be caught, which is set up in its catching position in the conveying plane E19 of the suction belt table 19, with this at least a stop surface 66, starting from an inactive starting position of the catching device 58, is set up by a double-acting pneumatic cylinder 81 by a movement of its cylinder piston 82 into the catching position, this pneumatic cylinder 81 having a bottom chamber 68 and a bearing chamber 69 separated from the bottom chamber 68 by the cylinder piston 82 has, wherein a pneumatic circuit is provided for controlling the movement of the
- the catching device 58 has a crank mechanism driven by the cylinder piston 82 of the pneumatic cylinder 81 in accordance with the preceding description.
- the movement of the cylinder piston 82 is controlled by the control unit 71 such that a positive acceleration is set for the cylinder piston 82 in a first half of its stroke and a negative acceleration is set in a second half of its stroke following the first half.
- At least the first switching valve 86 connected to the floor chamber 68 is preceded by a pressure reducer 88 .
- at least the first switching valve 86 connected to the bottom chamber 68 e.g. B. a preferably adjustable in its opening cross-section throttle valve 91 downstream. The opening cross section of the throttle valve 91 z. B.
- the cylinder piston 82 preferably has an end position damping element 83; 84 on, being said at the end of the second half of his Hubs remaining residual speed of the cylinder piston 82 at the end position damping element 83 in question; 84 is braked.
- at least the bottom chamber 68 of the pneumatic cylinder 81 is at a pressure greater than the barometric pressure, preferably at a pressure of z. B. 2 bar applied.
- the control unit 71 switches the first switching valve 86, which is connected to the bottom chamber 68, to a position that diverts the air mass from the bottom chamber 68 and at the same time switches the second switching valve 87, which is connected to the storage chamber 69, so that the storage chamber 69 is supplied with compressed air is subjected to a pressure of more than 5 bar.
- the suction belt table 19 has in its conveying plane E19 a switching area 52 with a plurality of suction bores 53 extending in the transport direction T of the sheets, with preferably several controllable fluidic effects below the conveying plane E19 of the suction belt table 19
- Suction chambers 41 are arranged. These suction chambers 41 are preferably arranged one behind the other in the transport direction T of the sheets and, in particular, their respective pressure is or at least can be switched individually and independently of one another.
- the suction bores 53 in the switching area 52 form a fluidic connection to at least one of the preferably several suction chambers 41 arranged below the conveying plane E19 of the suction belt table 19, with the respective setting of the pressure in the relevant suction chamber 41 in this switching area 52 using a suction device 72 controlled by the control unit 71 at the suction bores 53 in the conveying plane E19 of the suction belt table 19, a vacuum is set or at least adjustable.
- This negative pressure causes a sheet lying on the at least one feed belt 54 in the conveying plane E19 of the suction belt table 19 to be held in a frictional or non-positive manner. This is because the switching area 52 at least partially overlaps with the outline of the arc to be caught.
- the relevant feed belt 54 is z.
- the feed belt 54 is preferably designed as a flat belt or as a flat belt.
- At least one pneumatic timing valve 74 controlled by a control unit 71 is arranged in the suction chamber 41 with the respective suction bores 53 pneumatically connecting the supply line 73, the timing valve 74 in question interrupting the pneumatic connection when the catching device 58 is moved into its catching position.
- the clock valve 74 in question is designed in such a way that, at the same time as the pneumatic connection between the suction chamber 41 in question and the respective suction bores 53 is interrupted, a section of the supply line 73 between the clock valve 74 in question and the respective suction bores 53 is supplied with barometric pressure or with a pressure which is 3% to 10% higher than barometric pressure, preferably 5% higher.
- the transport speed of the sheets corresponds to a cycle time in which directly successive sheets reach the position of the at least one stop surface 66 of the catching device 58 protruding from the conveying plane E19 of the suction belt table 19 .
- a switching time of the cycle valve 74 in question is dimensioned to be shorter than the cycle time of sheets directly following one another and is preferably in a range between 20 ms and 100 ms, in particular 40 ms.
- the switching time of the clock valve 74 in question is the time beginning with the point in time of its actuation until reaching that point in time at which the clock valve 74 in question has stably changed from its first operating position into its second operating position.
- the control unit 71 is preferably designed in such a way that it puts the cycle valve 74 in question into the state that interrupts the pneumatic connection between the suction chamber 41 in question and the respective suction bores 53 one cycle time earlier before actuation of the catching device 58 .
- the suction belt table 19 immediately upstream transport device to this suction belt table 19 is arranged transversely to the transport direction T of the sheets extending guide device 42 with preferably a plurality of lifting nozzles 43 arranged in at least one row.
- This guide device 42 with its several lifting nozzles 43 is arranged in the transport direction T of the sheets in particular in front of the at least one skid belt 48 at the transition from the transport device arranged upstream of the suction belt table 19 to this suction belt table 19.
- the deflection roller 76 arranged at the point of discontinuity 78 has e.g. B. a plurality of nozzle-shaped openings, with a compressed air jet emerging from each of these openings, with one of the compressed air jets being directed at least in the direction of the at least one siphon nozzle 43 .
- Fig. 14 shows an example in a top view of a section of the z. 3 described in connection with FIG. B. belonging to a dryer 17 circulating conveyor belt 18 lying in a conveying plane E19 transferred to the suction belt table 19.
- a rotating deflection roller 76 that moves the conveyor belt 18 in the transport direction T of the sheets 77 and deflects it at the end of the transport device arranged directly upstream of the suction belt table 19.
- the sheets 77 must overcome a point of discontinuity 78 in their mechanical support located in the conveying plane E19.
- the transfer belt 44 follows in the transport direction T of the sheet 77 z. B. two parallel ramps 48 z. B. in the form of each encircling endless belts.
- Fig. 15 shows a schematic and highly simplified example of the guide device 42 arranged in a point of discontinuity 78 relating to the mechanical support of the sheets 77 to be transported, with at least one siphon nozzle 43, preferably with a plurality of siphon nozzles 43, this point of discontinuity 78 e.g. B. between a belonging to a non-impact printing device 13 circulating conveyor belt 16 and a circulating conveyor belt 18 belonging to a dryer 17 is arranged.
- a sheet 77 transported in the transport direction T tends, as a result of the rotation of the deflection roller 76, to be drawn with its leading edge into a gap located at the point of discontinuity 78 in the periphery of the deflection roller 76 and extending transversely to the transport direction T of the sheets 77, and thus to a malfunction cause.
- Such a point of discontinuity 78 in the mechanical support of the sheets 77 to be transported consists of a sheet shown as an example in FIG.
- FIGS. 16 to 19 explain how the in such a point of discontinuity works
- the guide device 42 has a tapered profile element 79 extending transversely to the transport direction T of the sheets 77, preferably in the form on a squeegee, the tip of this profile element 79 preferably approximately tangentially against the Transport direction T of the sheets 77 is arranged facing towards the transport belt 16 of the non-impact printing device 13, with the tip of this profile element 79 being spaced from the transport belt 16 of the non-impact printing device 13, which is deflected on the rotating deflection roller 76, preferably by a gap, with this Gap in relation to the thickness of the sheet 77 greater width in the range z.
- the air jet blown out of the at least one lifting nozzle 43 arranged in the profile element 79 when the guide device 42 is activated flows against the conveyor belt 16 of the non-impact printing device 13, which is deflected at the deflection roller 76 this air jet hits the conveyor belt 16 in such a way that the direction of the core jet of this air jet intersects the circular peripheral line of the deflection roller 76 as a secant.
- this air jet is directed onto the conveyor belt 16 in such a way that a free upper limit of this air jet facing the front edge of the relevant sheet 77 neither intersects nor exceeds a tangent between the peripheral line of the deflection roller 76 and the relevant lifting nozzle 43 of the guide device 42.
- the transport device of the non-impact printing device 13 mentioned here as an example which is immediately upstream of the point of discontinuity 78 in the transport direction T of the sheets 77, has several, e.g. B. has at least two transport belts 16 arranged parallel to one another in the transport direction T of the sheets 77, provision can be made for at least one blower nozzle to be arranged between adjacently arranged transport belts 16 in the direction of the sheet 77 resting on these transport belts 16.
- the guide device 42 z. B. preferably deactivated by the control unit 71 by the air jet flowing out of the at least one siphon nozzle 43 being switched off.
- the air jet flowing out of the at least one siphon nozzle 43 is therefore preferably active in a clocked manner, this clocking with the arrival of the leading edge of the respective sheet 77 on the deflection roller 76 of the conveyor belt 16 deflected by means of this deflection roller 76 is synchronized.
- An air jet flowing out of the at least one siphon nozzle 43 of guide device 42 is therefore preferably only maintained until the front edge of the respective sheet 77 passes the gap located in the periphery of deflection roller 76 and extending transversely to the transport direction T of the sheets 77 at point of discontinuity 78 and the front edge of the respective sheet 77 has been lifted onto the profile element 79 of the guide device 42.
- discontinuity 78 is transverse to Transport direction T of the sheets 77 extending guiding device 42 with a pointed profile element 79, wherein the tip of this profile element 79 is directed counter to the transport direction T of the sheets 77 to the conveyor belt 16 of the first transport device, wherein in the profile element 79 at least one lifting nozzle 43 is arranged, the relevant siphon nozzle 43 being designed to open out in the direction of the tip of this profile element 79 .
- the tip of the profile element 79 is spaced from the deflected on the rotating deflection roller 76 conveyor belt 16 of the first transport device by a gap, this gap having a greater width in relation to the thickness of the sheet 77 in the range between 1 mm and 5 mm.
- a plurality of lifting nozzles 43 are arranged in the profile element 79 in a row extending transversely to the transport direction T of the sheets 77 .
- an air jet flowing out of the mouth of the respective lifting nozzle 43 is directed or at least can be directed against the conveyor belt 16 of the first transport device, which is deflected at the deflection roller 76, with this air jet being directed onto the conveyor belt 16 in such a way that that a core jet of this air jet intersects the peripheral line of the deflection roller 76 as a secant.
- the air jet in question is also aligned in particular in such a way that a free upper limit of this air jet, facing a front edge of a sheet 77 being transported on conveyor belt 16 of the first transport device, does not intersect a tangent between the peripheral line of deflection roller 76 and the relevant lifting nozzle 43 of guide device 42 still exceeds.
- the control device 42 is activated by the control unit 71 .
- the control unit 71 activates the guide device 42 z. B. clocked, this cycle is synchronized with the arrival of the front edge of the respective sheet 77 at the deflection roller 76 of the deflected by means of this deflection roller 76 conveyor belt 16 of the first transport device.
- the guide device 42 is therefore preferably designed to maintain the air jet flowing out of the relevant siphon nozzle 43 only until the leading edge of the respective sheet 77 reaches the edge located in the periphery of the deflection roller 76 transversely to the transport direction T of the sheets 77 extending gap has passed at the point of discontinuity 78 and the front edge of the respective sheet 77 has been lifted by the air jet flowing out of the relevant lifting nozzle 43 onto the tip of the profile element 79 of the guide device 42.
- the deflection roller 76 that deflects the at least one conveyor belt 16 of the first transport device and the guide device 42 together with its profile element 79 are each arranged below the conveying plane E19 of the sheets 77 to be transported and preferably flush with this conveying plane E19 at the top. Since the machine arrangement is designed as a digital printing machine in its preferred embodiment, the processing station having the first transport device is designed either as a non-impact printing device 13 or as a dryer 17 or as a cooling section.
- FIG. 20 shows an enlarged detail of the suction belt table 19 shown in Fig. 3 in a plan view, this detail focusing in particular on an arrangement of nozzles 49 in an area between one of the two diverter belts 48 arranged parallel to one another in the transport direction T of the sheets and a edge 94 running along the transport direction T of the sheets and laterally delimiting the conveying plane E19 of the suction belt table 19.
- the ramp belts 48 are preferably in the form of rotating belts Endless belts, in particular each designed as a suction belt, the suction belt in question being in a pneumatic operative connection with a suction device 72 and being able to exert a suction force on a sheet lying on it as a result of its perforation at least in sections.
- the transport direction T of the sheets is indicated in FIG. 20 by a directional arrow.
- a blowing direction of the nozzles 49 arranged in the aforementioned area, ie a flow direction of an air stream emerging from these nozzles 49, is z. B. directed in the transport direction T of the sheets.
- the blowing direction of the nozzles 49 arranged in this area is either orthogonal to the edge 94 laterally delimiting the conveying plane E19 of the suction belt table 19 or at 45° in the transport direction T of the sheets to which the conveying plane E19 of the Suction belt table 19 laterally bounding edge 94 directed inclined. It can advantageously also be provided that the blowing direction of a first subset of the nozzles 49 z. B. orthogonal to the edge 94 laterally delimiting the conveying plane E19 of the suction belt table 19 and the blowing direction of a second subset of the nozzles 49 z. B. by 45 ° in the transport direction T of the sheet to which the conveying plane E19 of the suction belt table 19 laterally bounding edge 94 is inclined.
- Fig. 21 shows a section of the side view of the suction belt table 19 shown in Fig. 2. It is provided that sheets fed to the suction belt table 19, in particular from a dryer 17, are gripped by at least one transfer belt 44 and transported further in the conveying plane E19 of the suction belt table 19 should be. Particularly in the area of the at least one transfer belt 44 and in the area of the chute belts 48 of the suction belt table 19 arranged downstream of the at least one transfer belt 44 in the transport direction T of the sheets, or in the transport direction T of the sheets directly following a point of discontinuity 78 in the mechanical support of the sheets to be transported, e.g . B.
- nozzles 49 are arranged (Figs. 3 and 20). These nozzles 49 are designed in particular as venturi nozzles and are connected to a compressed air source 93 by means of a pneumatically connecting supply line 96 .
- a control valve 97 for adjusting and/or controlling the pressure of an air stream flowing out of the respective nozzle 49 is arranged in the supply line 96 connecting at least one of the nozzles 49 to the compressed air source 93 .
- a z. B. controlled by the control unit 71 clock valve 74 is arranged.
- Such a clock valve 74 is preferably controlled by the control unit 71 in such a way that at least one of the nozzles 49 is pressurized with compressed air at the precise moment when the front edge of a sheet to be transported is covered by the relevant nozzle 49.
- the application of compressed air to the relevant nozzle 49 is interrupted again by the control unit 71 in particular when the leading edge of the relevant sheet to be transported is brought into overlap by a nozzle 49 closest in the transport direction T of the sheets. It is also provided that the application of compressed air to the nozzles 49 arranged in the outline of a sheet to be caught is then interrupted by means of the relevant timing valve 74 when the catching device 58 of the suction belt table 19 is switched to its catching position.
- the conveying plane E19 of the suction belt table 19 experiences a downward inclination with an acute angle in the range between 5° and 30° compared to the previous orientation of the conveying plane, with the in the area between the at least one transfer belt 44 and the relevant conveying plane E19 the arrangement of the nozzles 49 formed on the edge 94 delimiting the suction belt table 19 in the transport direction T of the sheets over the relevant bend 46; 47 extends beyond.
- the nozzles 49 are each z. B. arranged in several rows extending transversely to the transport direction T of the sheets (FIGS. 3 and 20).
- the nozzles 49 are each connected to a compressed air source 93 by means of a pneumatically connecting feed line 96, with at least one of the feed lines 96 connecting at least one of the nozzles 49 to the compressed air source 93 preferably having a control valve 97 for adjusting and/or controlling the pressure of one of the respective nozzle 49 outflowing air flow is arranged.
- the feed line 96 connecting at least one of the nozzles 49 to the compressed air source 93 is located between the control valve 97 and the nozzle 49 in question Clock valve 74 arranged.
- the control valve 97 in question and/or the clock valve 74 in question are controlled by a control unit 71 .
- the clock valve 74 in question is activated by the control unit 71 in particular when the leading edge of a sheet to be transported is overlapped by the nozzle 49 in question.
- the clock valve 74 in question is deactivated by the control unit 71 in particular when the front edge of the sheet to be transported in question is brought into overlap by a nozzle 49 that is closest in the transport direction T of the sheets.
- the suction belt table 19 has a catching device 58 with the features described above for sheets to be caught, the clock valve 74 in question being deactivated by the control unit 71 when the catching device 58 is switched to its catching position.
- the nozzles 49 are each designed as a Venturi nozzle, they generate a suction force on a sheet to be transported that is many times greater than a holding force generated by the suction flow on a suction belt arranged in the conveying plane E19 of the suction belt table 19 is provided for holding a sheet lying flat on the relevant suction belt.
- the width of the region that has the arrangement of nozzles 49, extending transversely to the transport direction T of the sheets, is designed to be significantly larger than the width of the relevant suction belt, which extends transversely to the transport direction T of the sheets, so that the width of the suction belt outside the width of the relevant suction belt the arrangement of the area having nozzles 49 is in a substantially more favorable relationship to the width of the arched leading edge of the relevant sheet. Consequently, an effective surface formed by the arrangement of the nozzles 49 and acting on the arched front edge of the sheet in question is significantly larger than the effective surface acting on the arched front edge of the sheet in question by the suction belt in question.
- the nozzles 49 designed as Venturi nozzles can cause the highly arched front edge of the sheet in question to be sucked forward until the front edge in question enters the effective range of the suction flow of the affected suction belt reaches.
- control unit 71 is thus designed in such a way that it first applies compressed air to nozzles 49 and only then, i.e. with a delay, does the suction force exerted on the sheet by at least one transfer belt 44 designed as a suction belt begin to act.
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- Engineering & Computer Science (AREA)
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- Delivering By Means Of Belts And Rollers (AREA)
Abstract
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DE102021118471.1A DE102021118471A1 (de) | 2021-07-16 | 2021-07-16 | Maschinenanordnung mit mehreren jeweils Bogen bearbeitenden Bearbeitungsstationen |
PCT/EP2022/066843 WO2023285081A1 (de) | 2021-07-16 | 2022-06-21 | Maschinenanordnung mit mehreren jeweils bogenförmige substrate bearbeitenden bearbeitungsstationen |
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EP22737434.5A Pending EP4274792A1 (de) | 2021-07-16 | 2022-06-21 | Maschinenanordnung mit mehreren jeweils bogenförmige substrate bearbeitenden bearbeitungsstationen |
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DE3022650A1 (de) * | 1980-08-01 | 1982-01-14 | VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig | Einrichtung zum ausrichten von bogen |
JP2001233527A (ja) | 2000-02-22 | 2001-08-28 | Riso Kagaku Corp | 排紙装置及び印刷装置 |
DE10146919C1 (de) | 2001-09-24 | 2003-05-15 | Koenig & Bauer Ag | Vorrichtung zur Ausrichtung von in einer Lage übereinander angeordneten Bogen |
DE102005029972A1 (de) * | 2005-06-28 | 2007-01-11 | Koenig & Bauer Ag | Anlegmarken |
DE102016207406B4 (de) | 2015-08-06 | 2021-10-28 | Koenig & Bauer Ag | Transportvorrichtung zum sequentiellen Transport einzelner bogenförmiger Substrate entlang einer vorgegebenen Bahn |
DE102016207397A1 (de) | 2016-04-29 | 2017-11-02 | Koenig & Bauer Ag | Vorrichtung zum Unterschuppen von Bogen |
DE102018201921B4 (de) | 2018-02-07 | 2020-07-02 | Koenig & Bauer Ag | Bogenbearbeitungsmaschine mit zumindest einer Substratzufuhreinrichtung |
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