EP0695707A2 - Dispositif pour le guidage sans contact d'un matériau en forme de feuille - Google Patents

Dispositif pour le guidage sans contact d'un matériau en forme de feuille Download PDF

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Publication number
EP0695707A2
EP0695707A2 EP95110718A EP95110718A EP0695707A2 EP 0695707 A2 EP0695707 A2 EP 0695707A2 EP 95110718 A EP95110718 A EP 95110718A EP 95110718 A EP95110718 A EP 95110718A EP 0695707 A2 EP0695707 A2 EP 0695707A2
Authority
EP
European Patent Office
Prior art keywords
air
blowing
guide
blowing nozzles
conveying direction
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.)
Granted
Application number
EP95110718A
Other languages
German (de)
English (en)
Other versions
EP0695707A3 (fr
EP0695707B1 (fr
Inventor
Günter Stephan
Richard Mack
Peter Thoma
Joachim Herrmann
Gerd Raasch
Michael Szeidl
Jürgen Zeltner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0695707A2 publication Critical patent/EP0695707A2/fr
Publication of EP0695707A3 publication Critical patent/EP0695707A3/fr
Application granted granted Critical
Publication of EP0695707B1 publication Critical patent/EP0695707B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/228—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by air-blast devices
    • 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
    • B65H29/52—Stationary guides or smoothers
    • 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
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
    • 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
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/113—Details of the part distributing the air cushion
    • B65H2406/1132—Multiple nozzles arrangement

Definitions

  • the invention relates to a device for the contact-free guiding of sheet material, in particular by a printing press, preferably by a sheet-fed printing press, the material being dragged along a movement path, with a guide surface which is at a distance from the movement path and has air-blowing nozzles.
  • suction and blowing air devices which generate a suction or blowing air flow, the air flow acting on the arch through openings in the guide surface.
  • These devices which generate a suction air and / or blown air flow, can indeed ensure that the arc remains on a certain path of movement due to the air guidance, but no freedom from contact with the guide surface can be guaranteed, since it is perpendicular to the air currents acting on the bow cannot prevent fluttering, especially of the bow end.
  • the sheets can be smeared, particularly in the area of the suction air.
  • a device which has only air-blowing nozzles, wherein blowing-nozzle pairs belonging together produce air flows which intersect at a different outlet angle and with which a dragged sheet is acted upon.
  • This special configuration of the blown air flow is intended to exert a suction effect and a support effect on the conveyed sheet.
  • the nozzles are arranged so that the air blown out of one nozzle is directed towards the outlet opening of the next. The leadership effect is unsatisfactory.
  • the invention is therefore based on the object of creating a device of the generic type with which contact-free guiding of sheet material regardless of its format and its grammage, at different machine speeds in all areas of a processing machine, in particular a printing press, in a simple and inexpensive manner is possible.
  • the guide surface in a guide zone has such arranged and / or aligned air blowing nozzles that their common flow pattern (gap flow) which forms when guiding the arcuate material is essentially determined by a first speed component in the direction of movement of the material and a second and a third speed component , which point in the direction of the two side edges of the movement path, the second speed component of the one and the third Speed component is assigned to the other side edge, it is advantageously possible to enable a non-contact guidance of the material over the guide surface.
  • the guide surface has at least two zones located one behind the other in the direction of movement (conveying direction) of the material, preferably an inlet zone, a guide zone and / or an outlet zone, each with a different flow pattern caused by appropriate design and / or arrangement of the air-blowing nozzles having.
  • Figure 17 schematically shows a side view of a sheet printing machine in a further embodiment.
  • FIG. 1 shows schematically a sheet printing machine generally designated 10.
  • the sheet-fed printing press 10 has a feeder 12, one or more, in the example shown four printing units 14, a coating system 16 and a delivery unit 18.
  • the printing units 14 consist of printing cylinders 20, not to be explained in more detail here, and further cylinders 22 as well as dampening and inking unit cylinders 24.
  • Sheet guiding cylinders 26 are arranged between the printing units 14 and turning cylinders 28 can be provided.
  • sheet guiding devices designated as guide surfaces 32 are arranged.
  • the guide surfaces 32 can have both a flat and a concave or convex curved shape and are arranged in regions along the path of movement of the sheets 30, with the aim that the sheets do not come into contact with the guide surfaces 32 or other machine parts of the sheet printing machine 10 during their transport receive.
  • the sheets 30 are at a distance from the guide surfaces 32 by not shown Gripper systems dragged along their path of movement, which attack on the front edge of the sheet 30.
  • the guide surfaces 32 are arranged between the feeder 12 and the first printing unit 14, between the individual printing units 14 in the region of the sheet guiding cylinders 26 and the turning cylinders 28 and in the delivery arm 18.
  • the guide surfaces 32 can also be combined with dryer sections and feeds to the pressure cylinders 20, which are not to be considered in more detail here.
  • the guide surfaces 32 can - as seen in the sheet conveying direction 34 - be designed as an uninterrupted unit, that is, it is formed in one piece.
  • the continuous guide surface 32 can also be constructed in such a way that it consists of successively arranged, separate sections 36, which are assembled in a manner to be explained.
  • the guide surface arranged in the boom 18 consists of two sections 36.
  • the concave or convex curved guide surfaces 32 arranged around the cylinders can likewise consist of individual sections, which in turn then together result in an uninterrupted guide surface 32.
  • the individual guide surfaces 32 are connected to a blower 40 via a supply line system 38. During operation of the sheet-fed printing machine 10, the supply line system 38 is supplied with blown air via the blower 40, which blows out from air-blowing nozzles arranged on the guide surfaces 32 and forms the guide air for the sheets 30 there.
  • FIG. 2 shows a top view of a guide surface 32.
  • the guide surface 32 can have a flat as well as a concave or convex curve and is arranged in such a way that it runs essentially parallel to the movement path for the arches 30 which is predetermined by the gripper system.
  • the sheet 30 is dragged along the guide surface 32 by the gripper system, this being done without contact, in particular with regard to the rear edge of the sheet.
  • the distance of the guide surfaces 32 to the gripper system is approximately 5 to 30 mm to prevent collisions between the gripper system and the guide surface 32.
  • the guide surface 32 has at its front end 42 in the sheet conveying direction 34 arranged transversely to the sheet conveying direction 34 recesses 44 which are assigned to individual grippers of the gripper system, so that they can get into the area of the guide surface 32 during their movement without colliding with it.
  • the guide surfaces 32 have a smooth surface 46. As already mentioned, they can be made in one piece, for example from sheet metal or else individual segments arranged transversely to the sheet conveying direction 34, which are connected to one another. The individual segments are connected in such a way that the surfaces 46 of the individual segments merge into one another flush and in alignment.
  • Air-blowing nozzles 48 are embedded in the surface 46 of the guide surfaces 32 and are connected to the supply line system 38 for blowing air shown in FIG.
  • all air-blowing nozzles 48 of a guide surface 32 can be connected to a supply line by a corresponding channel design below the guide surfaces 32.
  • the air blowing nozzles 48 each have an air outlet opening 50, from which blowing air jets 52 emerge.
  • the sum of the blowing air jets 52 of all the air blowing nozzles 48 arranged on a guiding surface 32 generates the guide air for the sheets 30 carried over the guiding surface 32, a certain flow pattern according to the invention being established.
  • a gap flow is generated in the gap resulting between each of the arches 30 and the surface 46, which ensures contact-free guiding of the arches 30 over the guide surface 32.
  • the flow pattern of the gap flow is set such that all of the blow air jets 52 are arranged on the guide surface 32 as the resultant Air-blowing nozzles 48 result in a speed component of the gap flow in the sheet conveying direction 34 and further speed components which, starting from the middle of the sheet, run symmetrically to the lateral edges of the sheets 30 pointing in the sheet conveying direction. This results in a flow pattern widening in a trumpet shape over the entire guide surface 32.
  • This orientation of the gap flow ensures an optimal guidance of the sheets 30 over the guide surface 32, so that the sheets 30 are guided flutter-free and thus without contact.
  • the arrangement of the air blowing nozzles 48 on the surface 46 is selected such that they are preferably arranged in mutually offset rows transversely to the sheet conveying direction 34.
  • the arrangement of the air-blowing nozzles 48 is illustrated on the basis of FIG.
  • a first row of air blowing nozzles 48 is arranged next to one another on the surface 46 of the guide surface 32.
  • the air blowing nozzles 48 are at a distance A from one another.
  • the exiting blowing air jet 52 has a specific divergence area 54.
  • the divergence region 54 widens in a funnel shape in the sheet conveying direction 34.
  • the air blowing nozzles 48 of a second row, which is offset downstream in the sheet conveying direction 34, are arranged such that they are located at the intersections 56 of the side edges of the divergence regions 54 of the upstream air blowing nozzles 48.
  • This arrangement of the air blowing nozzles 48 in the intersection points 56 continues over the entire guide surface 32. This ensures that there is a uniform gap flow between the guide surface 32 and the sheet 30 guided above it, so that no smearing of the sheets 30 occurs.
  • the above-mentioned arrangement of the air blowing nozzles is not shown in a row, but is only indicated by means of the air blowing nozzle shown on the left side of the figure. However, it is it is also possible to arrange the air blowing nozzles 48 after the intersection points 56 in the sheet conveying direction 34.
  • the distance of the air-blowing nozzle 48 to the intersection 56 in the sheet conveying direction 34 is preferably at most half the distance A between two adjacent air-blowing nozzles 48 of the preceding row.
  • FIG. 3 shows the three options for arranging the downstream air blowing nozzles 48.
  • the left air-blowing nozzle 48 is - as mentioned - arranged at the intersection 56, the middle air-blowing nozzle 48 after the intersection 56 and the air-blowing nozzle 48 shown on the right before the intersection 56 at the appropriate distance.
  • the structure of the air blowing nozzles 48 is illustrated with the aid of FIGS. 4 and 5.
  • the sectional view in FIG. 4 shows that the guide surface 32 has openings 58 at the points at which the air-blowing nozzles 48 are arranged, into which openings 58 the air-blowing nozzles 48 are inserted flush with the surface 46 of the air-guiding surface 32.
  • the air blowing nozzles 48 each consist of a rotationally symmetrical nozzle bed 60, into which a nozzle plate 62 is inserted, for example glued, which has the arcuate air outlet opening 50.
  • a further plate 64 is arranged below the air outlet opening 50 on the nozzle plate 62 at an angle ⁇ to the surface 46.
  • the angle ⁇ is preferably 25 °.
  • the side surfaces of the nozzle bed 60 pass through the associated opening 58 and have a thread 65 onto which a nut can be screwed so that the air blowing nozzle 48 can be fixed in position on the guide surface 32.
  • the air-blowing nozzle 48 essentially consists of rotationally symmetrical parts which, in terms of production technology, can be produced simply by bending, punching, laser cutting, embossing, Extrusion, deep drawing or by injection, pressure or investment casting can be made. Due to the rotationally symmetrical design, the air blowing nozzles 48 can be rotated and aligned in a simple manner in the openings 58 with respect to the sheet conveying direction 34.
  • the air outlet opening 50 - as mentioned - is curved and has an opening angle ⁇ which determines the divergence region 54 shown in FIG. 3.
  • the opening angle ⁇ can, depending on the use and arrangement of the air blowing nozzles 48, extend in the range from 15 ° to 90 °. With certain arrangements, opening angles ⁇ are also possible up to 360 °.
  • the air-blowing nozzles 48 are designed in such a way that there are constrictions in the flow of the air provided via the supply line system 38 in front of the respective air outlet opening 50, which lead to an increase in pressure.
  • the potential energy (pre-pressure) of the air in the air blowing nozzle 48 is converted into kinetic energy in a particularly favorable manner, so that the air can flow into the gap between the bends 30 and the guide surface 32 at high speed. This supports the expansion of the air into a flow pattern with a closed film carrying the arch 30.
  • the suction effect on the bows 30 dragged past the air blowing nozzles 48 can be increased due to the Bernoullian equation, so that this is in equilibrium of the suction action and which can move in the sheet conveying direction 34 and in particular symmetrically to the side edges of the sheet 30 gap flow non-contact over the guide surface 32.
  • the guide surfaces 32 are arranged in areas in which high centrifugal forces act on the sheet 30 being passed, for example in concave or convex curved guide surfaces 32, or in which air squeegees of dryers act on the side of the sheet 30 facing away from the guide surfaces 32, which act in the direction of the guide surface 32 can be increased to compensate for these increased effects of the angle ⁇ , in particular up to 60, so that there is an impulse force component of the generated gap flow to compensate for these influences.
  • the guide surface 32 which is designed to be continuous - in particular in one piece - in the sheet conveying direction 34, can have individual functional zones located one behind the other in the sheet conveying direction 34.
  • FIG. 6 shows a guide surface 32 designed in this way.
  • a guide surface 32 consists of a plurality of sections 36 arranged one behind the other, which are separated from one another, for example, by a gap
  • the division into the functional zones preferably applies to each section 36.
  • the guide surface 32 successively has an inlet zone 66, a guide zone 68 and an outlet zone 70.
  • a guide surface 32 without this zone division has only one zone, which corresponds here to the guide zone 68.
  • Zones 66, 68 and 70 are adapted to the respective functional requirements that are placed on them and to their task within the entire guiding surface 32.
  • the differences may be in the arrangement and / or orientation of the air blowing nozzles 48, including their different ones Equipment with respect to the angles ⁇ and / or ⁇ shown in Figures 4 and 5 exist.
  • the inlet zone 66 is designed such that an incoming sheet 30 is tightened against the sheet conveying direction 34.
  • air blowing nozzles 48 which are oriented in opposite directions are arranged offset in two rows with respect to one another.
  • a sheet 30 entering the entry zone 66 is tightened and stabilized in a floating position, thus ensuring that the sheet 30 can enter the subsequent guide zone 68 without fluttering.
  • the blowing air jets 52 directed against the sheet conveying direction 34 prevent the sheet 30 from being guided against the guide surface 32 as a result of centrifugal forces occurring.
  • the inlet zone 66 can either run flush with the entire guide surface 32, that is to say flat or with a correspondingly adapted concave or convex curvature.
  • the front edge area can be flat or, as shown in FIG. 7, is rounded.
  • the blowing air jets 52 directed against the sheet conveying direction 34 at the same time prevent the upstream areas of the guide surface 32 from being influenced by flow of guide air as a result of the gap flow between the guide surface 32 and a sheet 30 guided above it that a kind of toothing is provided in the area of the inlet zone 66 in order to be able to maintain minimal gap openings between the guide surface 32 and the arch 30.
  • the guide zone 68 adjoining the inlet zone 66 takes over the contact-free guiding of the sheets 30 in this area of the guide surface 32.
  • the arrangement of the air-blowing nozzles 48 is selected such that the resultant of the blowing air jets 52 of all the air-blowing nozzles 48 arranged in the guiding zone 68 is a speed component of the Gap flow in the sheet conveying direction 34, a further speed component starting from the center of the sheet to the one side edge and a further speed component to the other side edge of the sheet 30.
  • the two last-mentioned speed components can preferably be formed symmetrically to one another.
  • the arrangement of the air-blowing nozzles 48 can deviate from the arrangements explained in FIGS.
  • the air blowing nozzles 48 are arranged in any case so that they do not interfere with each other, that is, the blowing air jets 52 of an air blowing nozzle 48 do not compensate, swirl or blow the blowing air jets 52 of another air blowing nozzle 48.
  • the guide zone 68 is followed in the sheet conveying direction 34 by the outlet zone 70, which, like the inlet zone 66, can also have a rounding away from the guide surface 32, that is to say away from the path of movement of the sheets 30, as shown in FIG. 7.
  • the outlet zone 70 can, however, also be formed without this rounding, that is to say abruptly abort.
  • the design of the outlet zone 70 is based on the machine elements adjoining the guide surface 32. If the guiding surface 32 is followed by a machine element, the contact of which is to be avoided by the bends 30, the outlet zone 70 is arranged higher or the same height as the following guiding device.
  • the outlet zone 70 is arranged lower to a maximum of the same height.
  • the outlet zone 70 has an arrangement of the air blowing nozzles 48 such that their blowing air jets 52 are directed transversely to the sheet conveying direction 34.
  • the Air-blowing nozzles 48 are arranged symmetrically in the outlet zone 70, so that there is a uniformly directed flow pattern of the gap flow from the center of the arc to both lateral edges. This prevents the trailing edge of the sheet 30 from fluttering and smearing when leaving the guide surface 32.
  • the guide air that is to say the gap flow that occurs in the guide zone 68
  • the guide air can act on the guide surface 32 downstream guide devices.
  • An outflow of the guide air, that is, the gap flow between the guide surface 32 and the sheet 30, is thus ensured in the side regions, so that subsequent critical guide devices prevent fluttering movements etc. of the trailing edge of the sheet.
  • FIG. 7 shows the transition between two sections 36 which are arranged one after the other in the sheet conveying direction 34 and which together form part of a guide surface 32. It is clear that both the outlet zone 70 of the section 36 upstream in the sheet conveying direction 34 and the inlet zone 66 of the subsequent section 36 have a rounding 71 or 73 directed away from the respective flat surface 46.
  • the sections 36 are arranged at a distance from one another, so that there is a gap 72 between the outlet zone 70 of the first and the inlet zone 66 of the second section 36.
  • the air-blowing nozzles 48 are indicated here with arrows, the alignment of which will not be discussed further in detail.
  • a gap flow 74 is established between it and the surface 46, which forms the guide air for the sheet 30.
  • the gap flow 74 adheres partly to the arch 30 and partly to the rounding 71 of the outlet zone 70.
  • a part of the sheet 30 is drawn into the gap 72, but without smearing on the rounding 71 of the outlet zone 70.
  • at least one air blowing nozzle 76 is arranged upstream thereof, which ensures an air layer between the inlet zone 66 and the sheet 30.
  • the air flow 78 generated by the additional air blowing nozzle 76 combines with the part of the gap flow 74 which is adhesively adhering to the sheet 30. As a result, the sheet 30 does not touch the inlet zone 66.
  • FIG. 8 shows schematically the transition from a sheet guide cylinder 26 to a downstream cylinder, for example a printing cylinder 20.
  • the cylinders rotate about their axis and thus specify the sheet conveying direction 34.
  • the sheet 30 is guided by grippers, not shown, around the sheet guide cylinder 26 and transferred to conveying devices of the printing cylinder 20, also not shown.
  • a curved guide surface 32 is assigned to the sheet conveying cylinder 26, the surface 46 of which runs parallel to the jacket of the cylinder 26.
  • the guide surface 32 has a guide zone 68 and a rounding 71, directed away from the desired path of movement of the arch 30, with an outlet zone 70.
  • the outlet zone 70 has the air-blowing nozzles 48 indicated here with arrows.
  • the centrifugal forces indicated by arrows 80 from the rotation of the sheet-guiding cylinder 26 about its cylinder axis and shear forces of the resulting act in the transition region between the cylinders 26 and 20 gap flow 74 acting as guide air, which lead to a deflection 81 of the arc 30. Due to the Coanda effect, the gap flow 74 in turn adheres partly to the arch 30 and partly to the outlet zone 70. The one on the arch 30 adhering part of the gap flow 74 is partly guided against the lateral surface of the cylinder 20 and forms a swirl and accumulation zone 82 there. The parts of the gap flow 74 adhering to the outlet zone 70 flow against the direction of rotation of the cylinder 20 (indicated by arrow 84).
  • a boundary layer 86 is formed on its surface, which ensures a partial air flow in the region of the vortex and accumulation zone 82. Due to the formation of the vortex and accumulation zone 82, excessive bending of the arch 30 due to the centrifugal and thrust forces 80 is avoided. At the same time, this also prevents contact with the outer surface of the cylinder 20.
  • FIGS. 9 to 16 show examples of further possible nozzle arrangements of the individual air-blowing nozzles 48 on the guide surface 32.
  • the guide surface 32 has only one guide zone 68, that is to say no inlet zone 66 and outlet zone 70.
  • FIGS. 14 to 16 show various exemplary embodiments of guide surfaces 32 with inlet zones 66, guide zones 68 and outlet zones 70. Which of the guide surfaces 32 is intended for which application or which installation location is provided within the printing press 10 depends on the size of the risk of lubrication of sheets 30 guided over the guide surfaces 32. At non-critical points, guide surfaces 32 can be provided without a separately formed inlet zone 66 and outlet zone 70 be provided.
  • first air-blowing nozzles 48 ' are arranged on an imaginary center line of the guide surface 32 - viewed in the sheet conveying direction 34 - the blowing air jets of which are directed essentially in the sheet conveying direction 34.
  • second air-blowing nozzles 48 ′′ are arranged on both sides of the imaginary center line, the blowing air jets of which are directed in each case to the side edges of the guide surface 32.
  • the second air-blowing nozzles 48 ′′ are arranged in mutually offset rows running transversely to the sheet conveying direction 34, the blowing air jets of the air-blowing nozzles 48 ′′ pointing symmetrically to the side edges in the sheet conveying direction 34 at an angle deviating from 90 ° - based on the sheet conveying direction 34.
  • the second air-blowing nozzles 48 ′′ are arranged offset from one another in successive rows.
  • the blowing air jets of the air blowing nozzles 48 ′′ always point here into a gap formed by two air blowing nozzles 48 ′′ arranged downstream in the blowing direction of the second air blowing nozzles 48 ′′.
  • first air-blowing nozzles 48 ′ are again arranged on an imaginary center line of the guide surface 32 in the sheet conveying direction 34, the blowing air jets of which are directed essentially in the sheet conveying direction 34.
  • the second air-blowing nozzles 48 ′′ which are also provided here, are arranged in mutually offset rows running transversely to the sheet conveying direction 34, the first air-blowing nozzles 48 ′ each being level with a second row of air-blowing nozzles 48 ′′.
  • the second air blowing nozzles 48 ′′ point with their blowing air jets at an angle deviating from 90 ° - in relation to the sheet conveying direction - symmetrically to the Side edges of the guide surface 32.
  • the second air-blowing nozzles 48 ′′ are arranged offset in two successive rows in such a way that the blowing air jets of the second air-blowing nozzles 48 ′′ essentially point onto an air-blowing nozzle 48 ′′ downstream in the blowing direction of the row of the second air-blowing nozzles following in the sheet conveying direction 34 48 '' is directed.
  • first air-blowing nozzles 48 ' are again provided, which blow essentially in the sheet conveying direction 34 and are arranged on an imaginary center line of the guide surface 32.
  • the second air-blowing nozzles 48 ′′ which are likewise arranged in rows transverse to the sheet conveying direction 34, are arranged offset in relation to one another in immediately successive rows such that they are not offset symmetrically to one another. The result of this is that the blowing air jets of the second air blowing nozzles 48 ′′ are essentially directed onto an air blowing nozzle 48 ′′ of a row after the next of the second air blowing nozzles 48 ′′.
  • FIGS. 12 and 13 show exemplary embodiments in which the first air-blowing nozzles 48 ′ are in turn arranged on a center line of the guide surface 32 in the sheet conveying direction 34 and the blowing air jets of which essentially point in the sheet conveying direction 34.
  • the second air blowing nozzles 48 ′′ are in turn arranged in mutually offset rows transversely to the sheet conveying direction 34, the blowing air jets of the second air blowing nozzles 48 ′′ being directed essentially symmetrically transversely to the sheet conveying direction 34 in each case to the side edges of the guide surface 32.
  • the exemplary embodiments in FIGS. 12 and 13 differ only in the number of second air-blowing nozzles 48 ′′, which are each arranged on a row.
  • the guide surface 32 has an inlet zone 66 which has air blowing nozzles 48 in two rows which run parallel to one another and whose blowing air jets are directed in opposite directions to one another.
  • a first row of air-blowing nozzles 48 essentially point in the sheet conveying direction 34 with their blowing air jets, while the second row of air blowing nozzles 48 point essentially opposite to the sheet conveying direction 34 with their blowing air jets.
  • the air blowing nozzles 48 of the two rows are arranged symmetrically offset from one another.
  • the air-blowing nozzles 48 arranged in the guide zone 68 are formed by first air-blowing nozzles 48 ′, which in turn are arranged on an imaginary center line of the guide surface 32, and second air-blowing nozzles 48 ′′, which are arranged in rows running transversely to the sheet conveying direction 34.
  • the second air-blowing nozzles 48 ′′ are arranged offset from the air-blowing nozzles 48 ′′ arranged in the adjacent row in such a way that a pyramid-like structure of the second air-blowing nozzles 48 ′′ running in the arc conveying direction 34 results.
  • the blowing air jets of the second air blowing nozzles 48 ′′ are essentially directed onto an air blowing nozzle 48 ′′, which is arranged in a row downstream in the sheet conveying direction 34.
  • the air blowing nozzles 48 are arranged in two rows running parallel to one another, their blowing air jets being aligned in such a way that a flow pattern which runs symmetrically transverse to the sheet conveying direction 34 results.
  • the guide surface 32 has an inlet zone 66 which corresponds to that shown in FIG.
  • first air-blowing nozzles 48 ′ are in turn arranged on an imaginary center line of the guide surface 32 and second air-blowing nozzles 48 ′′ in rows running transversely to the sheet conveying direction 34.
  • the second air blowing nozzles 48 ′′ are in successive rows arranged offset to one another so that their blast air jets are directed into a gap formed by the air blast nozzles 48 ′′ arranged downstream in the blast air direction of the second air blast nozzles 48 ′′.
  • the air blowing nozzles 48 of the outlet zone 70 are arranged here in a row and point with their blowing air jets symmetrically transverse to the sheet conveying direction 34.
  • FIG. 16 shows an exemplary embodiment in which air blowing nozzles 48 are again arranged in the inlet zone 66 on two mutually offset rows transversely to the sheet conveying direction 34; as already mentioned for FIGS. 14 and 15.
  • air blowing nozzles 48 are also arranged here in rows that also run transversely to the sheet conveying direction 34, the blowing air jets of which are each directed essentially in the sheet conveying direction 34.
  • a further sheet printing machine 10 is shown schematically in an overall view in FIG.
  • the same parts as in Figure 1 are provided with the same reference numerals and not explained again.
  • the guide surfaces 32 can in turn have a flat and a concave or convex curved shape.
  • the individual air-blowing nozzles 48 on the guide surfaces 32 and / or the division of the guide surfaces 32 or into individual sections 36 of the guide surfaces 32, such as inlet zone 66 and / or guide zone 68 and / or outlet zone 70 reference is made to the explanations for the preceding ones Figures referenced. In principle, every possibility is possible according to the specific application.
  • the guide surface 32 itself can be designed as a hollow body, for example as a sheet metal box, the side of which facing the arc 30 receives the air blowing nozzles 48.
  • the side facing the arch 30 then either has the openings 58 (FIG. 4) for receiving the air-blowing nozzles 48 or these are, for example, stamped directly into the wall associated with the arch 30.
  • the cavity having the guide surface 32 can be divided structurally, for example by the arrangement of partition walls, into individual separate segments.
  • the segments can either run in the sheet conveying direction 34 or also transversely to the sheet conveying direction 34.
  • each of these zones can be assigned a separate segment.
  • the individual segments can, according to the exemplary embodiment shown in FIG. 1, be connected either jointly to the supply line system 38 or in each case to this via a separate line. All guide surfaces 32 of a sheet-fed printing machine 10 are thus supplied with the blown air via a central blower 40.
  • the supply line system 38 assigned to each blower 40 is reduced and the occurrence of supply line losses is thus reduced.
  • a further possibility is to directly assign fans 88 to the guide surfaces 32, which are arranged directly on the guide surfaces 32, that is to say below these. This can be seen in FIG. 18. This enables a further reduction in supply losses.
  • a direct Assignment of the blowers 88 to the guide surfaces 32 makes it possible for the air to be sucked in where it occurs as exhaust air, that is to say after it has been used as guide air for the bends 30, to the side of the sheet edges or from provided outflow openings in the guide surfaces 32.
  • the individual segments or components of a guide surface 32 can be designed, for example, with standardized dimensions, so that their easy interchangeability and adaptation to the respective application is possible without problems.
  • an exchange of individual guide surfaces 32 can take place in a sheet-fed printing machine 10 if, due to the material to be processed, that is to say the sheet 30, a different configuration of the guide surface 32, for example with or without inlet and / or outlet zones 66 or 70, becomes necessary .
  • the printing machine 10 can thus be converted to the new requirements within a very short time.
  • the details of the mechanical fastening of the guide surfaces 32 to the printing press 10 and the joining together of the individual segments of a guide surface 32 are not to be discussed within the scope of the invention.
  • the individual guide surfaces 32 in particular at their critical transitions from or to a guide device, can be assigned viewing windows 90 through which observation of the Guiding effect of the guide surfaces 32 is possible.
  • An operating point 92 is assigned to the viewing windows 90, via which the air supply to the guide surface 32 or an air duct of the guide surface 32 itself can be influenced.
  • the flow parameters of the supplied air can be changed via the operating points 92, it being irrelevant here whether a central blower 40 (FIG. 1) or decentralized blower 88 are provided.
  • the nozzle admission pressure, the volume flow and / or the flow velocity of the air can be regulated.
  • throttle elements 32 which are arranged in the feed lines to the guide surfaces 32 or directly therein, can be assigned to the guide surfaces 32 or the individual segments of the guide surfaces 32. This makes it possible to influence the flow parameters of individual guide surfaces 32 or individual segments of the guide surfaces 32 independently of one another.
  • decentralized fans 88 When decentralized fans 88 are arranged, their fan speed can be regulated, for example, so that the flow parameters are influenced thereby.
  • the decentralized control of individual flow parameters enables feedback-free control to other guide surfaces 32.
  • the setting can be carried out either manually at the control points 92 or automatically via a central electronic control. With the help of the operating points 92, readjustment of individual areas, that is to say individual guide surfaces 32 or individual segments of the guide surfaces 32, can then optionally be carried out.
  • the solution shown in FIGS. 1 to 17 gives the possibility of a non-contact Guiding sheet 30 through the entire sheet-fed printing machine 10. If the parameters change, the guiding can be easily adapted so that contact-free guiding, which is independent of, for example, the machine speed, the formats and / or the grammage, can be guaranteed or set at any time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP95110718A 1994-08-03 1995-07-10 Dispositif pour le guidage sans contact d'un matériau en forme de feuille Expired - Lifetime EP0695707B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4427448 1994-08-03
DE4427448A DE4427448B4 (de) 1994-08-03 1994-08-03 Einrichtung zum berührungsfreien Führen bogenförmigen Materials

Publications (3)

Publication Number Publication Date
EP0695707A2 true EP0695707A2 (fr) 1996-02-07
EP0695707A3 EP0695707A3 (fr) 1997-01-15
EP0695707B1 EP0695707B1 (fr) 2000-11-08

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ID=6524816

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Application Number Title Priority Date Filing Date
EP95110718A Expired - Lifetime EP0695707B1 (fr) 1994-08-03 1995-07-10 Dispositif pour le guidage sans contact d'un matériau en forme de feuille

Country Status (4)

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US (1) US5687964A (fr)
EP (1) EP0695707B1 (fr)
JP (1) JP3655670B2 (fr)
DE (3) DE4447963B4 (fr)

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EP0780332A3 (fr) * 1995-12-20 1998-03-25 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour agir sur des feuilles dans un appareil de sortie de feuilles
EP1184315A2 (fr) * 2000-08-31 2002-03-06 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif suppresseur du cintrage pour matériaux imprimés plats
WO2002051732A2 (fr) * 2000-12-22 2002-07-04 Man Roland Druckmaschinen Ag Dispositif de transport flottant de matiere en bande ou en feuilles dans une machine de traitement
CN111747185A (zh) * 2020-06-30 2020-10-09 邵东智能制造技术研究院有限公司 绝缘纸下料设备

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EP0780332A3 (fr) * 1995-12-20 1998-03-25 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour agir sur des feuilles dans un appareil de sortie de feuilles
US5832826A (en) * 1995-12-20 1998-11-10 Heidelberger Druckmaschinen Ag Device and method for acting upon sheets in a sheet delivery system
EP1184315A2 (fr) * 2000-08-31 2002-03-06 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif suppresseur du cintrage pour matériaux imprimés plats
EP1184315A3 (fr) * 2000-08-31 2003-09-10 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif suppresseur du cintrage pour matériaux imprimés plats
WO2002051732A2 (fr) * 2000-12-22 2002-07-04 Man Roland Druckmaschinen Ag Dispositif de transport flottant de matiere en bande ou en feuilles dans une machine de traitement
DE10064531A1 (de) * 2000-12-22 2002-07-18 Roland Man Druckmasch Vorrichtung zum schwebenden Führen von Bahn- oder Bogenmaterial in einer Verarbeitungsmaschine
DE10064531C2 (de) * 2000-12-22 2002-11-07 Roland Man Druckmasch Vorrichtung zum schwebenden Führen von Bahn- oder Bogenmaterial in einer Verarbeitungsmaschine
WO2002051732A3 (fr) * 2000-12-22 2002-11-07 Roland Man Druckmasch Dispositif de transport flottant de matiere en bande ou en feuilles dans une machine de traitement
CN111747185A (zh) * 2020-06-30 2020-10-09 邵东智能制造技术研究院有限公司 绝缘纸下料设备
CN111747185B (zh) * 2020-06-30 2022-04-22 邵东智能制造技术研究院有限公司 绝缘纸下料设备

Also Published As

Publication number Publication date
US5687964A (en) 1997-11-18
DE59508834D1 (de) 2000-12-14
EP0695707A3 (fr) 1997-01-15
EP0695707B1 (fr) 2000-11-08
JP3655670B2 (ja) 2005-06-02
DE4447963B4 (de) 2005-12-29
DE4427448A1 (de) 1996-02-08
DE4427448B4 (de) 2008-07-31
JPH0859016A (ja) 1996-03-05

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