EP1753621B1 - Machine a imprimer comprenant un dispositif d'aspiration, dispositif d'aspiration et procede pour remplacer une garniture d'impression - Google Patents

Machine a imprimer comprenant un dispositif d'aspiration, dispositif d'aspiration et procede pour remplacer une garniture d'impression Download PDF

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Publication number
EP1753621B1
EP1753621B1 EP05740752A EP05740752A EP1753621B1 EP 1753621 B1 EP1753621 B1 EP 1753621B1 EP 05740752 A EP05740752 A EP 05740752A EP 05740752 A EP05740752 A EP 05740752A EP 1753621 B1 EP1753621 B1 EP 1753621B1
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EP
European Patent Office
Prior art keywords
printing plate
printing
suction
suction cup
bearing structure
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.)
Revoked
Application number
EP05740752A
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German (de)
English (en)
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EP1753621B8 (fr
EP1753621A1 (fr
Inventor
Wolfgang Dennstedt
Andreas Zahnd
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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Application filed by Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Priority to EP08170977A priority Critical patent/EP2080618A3/fr
Publication of EP1753621A1 publication Critical patent/EP1753621A1/fr
Publication of EP1753621B1 publication Critical patent/EP1753621B1/fr
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Publication of EP1753621B8 publication Critical patent/EP1753621B8/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/60—Devices for transferring printing plates

Definitions

  • the invention relates to a suction device for a color transfer serving printing form or another interchangeable coating of a lining carrier of a printing press.
  • the USP 4,727,807 suggests for the assembly and disassembly of a printing forme the use of a robot having suction cups on a robot arm for holding the printing forme.
  • the robot takes up a lot of space in the press. In addition, he can always handle only a single printing form.
  • a suction device for the assembly and disassembly of printing plates is further from the USP 5,806,431 and the USP 5,709,150 known.
  • the suction device comprises along an axis side by side a plurality of suction cups and rollers arranged therebetween.
  • the nipples are pressed against the printing plates so that the nipples form tight suction chambers with the printing plates.
  • the suction chambers are subjected to negative pressure, whereby the suction forces required to hold the printing plates are generated.
  • the suction cups provided for each printing plate can each be delivered independently of the suction cups for the other printing forms against the respective printing form and arranged so that they can be shut off.
  • an adjusting device for each printing form an adjusting device is provided in accordance to effect the supply and Abstellterrorism. Accordingly, a plurality of Saugnapf phenomenon are each arranged with a separate adjusting device for the on and off next to each other along a traverse extending in the axial direction of the respective pressure cylinder. For those with interchangeable ones Compression molds equipped printing plate carrier of the printing machine is provided in each case a separate suction device. Although the suction device in each case allows simultaneous handling of a plurality of printing forms arranged side by side on the printing form carrier, it is however mechanically complex and still requires comparatively much space directly at the respective printing form carrier.
  • a simple and inexpensive suction device for handling a plurality of printing pads, which requires little space.
  • the invention relates to a printing press with at least one pressure pad carrier, preferably a color-transmitting printing cylinder, on which a first pressure pad and at least one second pressure pad in an axial direction offset from each other can be attached.
  • the at least two pressure linings can be directly adjacent to one another in the axial direction. If a plurality of pressure linings can again be arranged next to one another on the printing form carrier transversely to the axial direction, the second pressure coating can also be offset transversely to the axial direction, in the case of a printing cylinder in the circumferential direction, relative to the first pressure coating.
  • the printing press further comprises a suction device arranged opposite the pressure pad carrier. The suction device extends in the axial direction.
  • the first suction cup and the second suction cup can be acted upon by the fluidic device independently of one another with the negative pressure or relieved of a negative pressure.
  • the suction cups of the suction device are thus fluidly separated from one another per printing pad. They therefore do not have to be mechanically separated by being mechanically independent of each other and can be set off, although this should not be ruled out from the outset.
  • a suction cup bearing structure common to the suction cups is preferred, on which the first suction cup and the second suction cup and, if present, preferably also further suction cups of the suction device are supported.
  • those suction cups which are to receive and hold a pressure pad are evacuated by means of the fluidic device.
  • the fluidic device can each be equipped with its own vacuum generator, for example a pump or a pressure reservoir, for the first suction cup and for the second suction cup, wherein the pressure generators can be operated independently of one another. More preferably, however, the negative pressure per suction cup is generated by means of a common pressure generator, and the first suction cup and the second suction cup with fluidic control members are separated from each other.
  • the first suction cup and the second suction cup are each passively formed as an elastically deformable suction cup and generate the vacuum itself.
  • a suction cup is pressed against the pressure pad of the pressure pad carrier to be supported and thereby resilient compressed. If the suction cup relieved or exerted a direction opposite to the pressing direction tensile force, the suction cup expands due to its elastic restoring forces or at least due to the tensile force again. Its bowl volume increases again accordingly.
  • the suction cup or the plurality of suction cups should suck the pressure pad or not, advantageously by connection with the environment or active Ventilation pressurized with an overpressure, while the suction cup or the suction cups, or should suck a pressure pad or should be acted upon by the negative pressure generated by the pressure generator or generated or generate the required negative pressure by elastic compression and subsequent expansion itself.
  • the embodiments also apply advantageously to the at least one further suction cup and more preferably to each further suction cup of the suction device.
  • the suction connection is fluidly released by increasing the pressure in the bowl volume. This can be accomplished by connecting the cup volume to a pressure reservoir, a pump or a compressor of the fluidic device to pressurize the well volume with an overpressure that is greater than atmospheric pressure. Instead, however, the alternative size of the bowl volume can easily be vented to ambient pressure.
  • a simple short circuit with the environment is the simplest and most cost-effective, an active pressurization is a particularly safe solution.
  • a fluid conduit opening into the well volume and a fluidic control member associated with the fluid conduit are provided for the fluidic inactivation.
  • the fluidic control member can assume a closed position in which it closes the fluid line, so that the suction cup with the pressure pad to be sucked can form the vacuum chamber.
  • the fluidic control member may be a two-way control member which is switchable between the closed position and a flow-through position.
  • it may also be a continuously variable fluidic control member or a Mehrwege horrglied with more than two different switching positions.
  • it can be an electric or be magnetically controllable control valve. The above applies to both an active and a passive suction cup.
  • such a fluidic control member can be used to connect the suction cup for suction with a vacuum generator and for inactivation with the environment or a pressure generator.
  • separate fluid lines may be provided per suction cup, in each of which a fluidic control element is arranged.
  • Separate fluid lines is more preferably associated with a common fluidic control member which closes one of the fluid lines in a first switching state and the other opens, and in another switching state reverses the conditions.
  • the fluidic control member or the plurality of fluidic control members of the suction device is or are preferably arranged outside of the pressurizable coverable axial portion of the pressure pad carrier. Even more preferably, they are arranged laterally, viewed from the pressure lining carrier, behind a casing of a machine frame.
  • the fluid conduit connects the bowl volume to a flow area through which pressure fluid flows, i. H. it branches off from the flow cross-section through, preferably at a point narrowest cross-section.
  • the pressurized fluid may advantageously be the pressurized fluid normally present under the usual overpressure at the location of the printing press, in particular compressed air.
  • the negative pressure can thus be generated by means of a pressurized fluid by the static pressure of the traversed venturi forms the negative pressure.
  • the suction device preferably comprises at least two bearing structures, namely a traverse, which supports the entire suction device, preferably on a frame part of the printing press, and a further bearing structure, which is supported on the traverse and is movable relative to the traverse in the supply and Abstellraum.
  • the force required for the closing and stopping movement can be generated mechanically, for example by means of an electric motor, or more preferably fluidically. A pneumatic power generation is then again preferred over a hydraulic one.
  • the suction device comprises a roller assigned to the suction cup, with which the suction device can be rolled over the pressure lining when the suction cups are parked, which is advantageous in particular for attaching the pressure lining to the pressure lining carrier and for unrolling the pressure lining from a cylindrical pressure lining carrier.
  • the further bearing structure in a preferred embodiment is subdivided into a suction cup bearing structure and a roller bearing structure.
  • the suction cup bearing structure and the roller bearing structure are each movable relative to the traverse and relative to each other in the supply and Abstellraum.
  • both the suction cup bearing structure and the roller bearing structure are supported directly on the traverse.
  • the roller bearing structure rotatably supports the roller about an axis which is transverse to the direction of engagement and disengagement.
  • the sucker is attached to the sucker bearing structure, which attachment may be rigid or allow movements of the sucker relative to the sucker bearing structure, such as compression or pivotal movement, as long as the function of sealing and supporting the pressure pad is backfilled.
  • all the suction cups of the suction device are supported on the suction cup bearing structure and thus can be switched on and off uniformly.
  • the roller bearing structure preferably supports all the rollers of the suction device, so that they are uniformly switched on and off.
  • the suction device preferably comprises a plurality of suction cups and also a plurality of associated rollers for handling a single pressure pad. If the suction force of a single suction cup is sufficient to safely lift the pressure pad, however, a single suction cup suffices per pressure pad, and a single roller is generally sufficient.
  • the suction device comprises in preferred embodiments per pressure-covering at least one sucker. More preferably, it comprises per pressure pad a suction cup group consisting of at least two suction cups. Furthermore, it should have at least one roller per printing pad, wherein for the application of a uniformly distributed over the pressure pad roller pressure, it is also preferred here, when the suction device per pressure pad distributed over the pad width has a group of roles.
  • the suction cup groups and / or roller groups can advantageously be controlled separately from one another in order to be able to move them in or against the pressing direction.
  • one fluid line each opens into the cup volume of each of the suction cups of the group in order to be able to inactivate each of these suction cups. It may also be sufficient to release the suction connection, only to vent a portion of the suction cups per group or to apply an overpressure.
  • the fluid lines can be closed and opened per Saugnapfegi means of individual Fluidik Gambglieder.
  • the fluid lines per suction cup group preferably lead to a common group line, which can be closed and opened by means of a fluidic control element provided for the group, so that only one single fluidic control element is required per suction cup group.
  • the suction device is preferably fixedly mounted in the printing machine, i. integral part of the printing press. However, this is not to say that the suction device can not be dismantled from a location of attachment by means of quick assembly and remounted at another location.
  • the invention also relates to a first provided for installation in a printing machine suction device, either for a new or a retrofitted to the suction machine.
  • the pressure pad to be handled by means of the suction device can in particular be a printing plate, preferably a printing plate, which is stretched on a forme cylinder or provided for a forme cylinder.
  • the suction device can also be used to handle other pressure linings, for example a blanket for or on a blanket cylinder.
  • the invention is directed primarily to the Used for rotary printing machines and especially for web presses, preferably in wet offset printing, it is for use in printing machines in general and not only for rotations advantage.
  • an adjusting device for switching on and off the suction cups or an adjusting device for the loading and unloading of the rollers can advantageously be located outside of the axial direction Axialabitess of Druckbelagismes be arranged, preferably on said traverse.
  • the arrangement of the adjusting device or adjusting devices laterally adjacent to the pressure lining carrier reduces the space requirement within the axial section which can be assigned with pressure linings. On the side next to this axial section, the space requirement generally does not play such a critical role.
  • This arrangement of the adjusting device or adjusting devices is advantageous, in particular for rotary printing presses, because in this way the suction device can be arranged particularly close to the respective printing gap and obstructs the other work on the respective printing unit less than the conventional suction devices in such an arrangement.
  • the suction device, the pressure pads and a clamping device of Druckbelaganks by means of which the pressure pads are fastened to the pressure pad carrier, matched to one another, that the pressure pads can be solved by means of a force exerted by the suction device on a Druckbelagende tensile force of the clamping device
  • the clamping device comprises per printing forme at least one clamping piece, which has a clamping surface, with which it clamps the pressure forming end in cooperation with a counter-surface.
  • the invention preferably provides clamping pieces which, in addition to the clamping surface, have a supporting surface on which the clamping piece in question is supported in the radial direction of the printing cylinder, so that the clamping piece can not become wedged with the clamped printing plate end when the printing plate end is pulled out of the clamping channel by means of the suction device ,
  • the printing plate end is angled flat and at right angles or even more obtuse, so that it by means of the clamping device only frictionally engaged and not additionally also positively held in a rear grip and is not bent.
  • the direction in which the suction cups are turned on and off is at least substantially parallel to the clamped ends, so that at least essentially only tensile forces act upon release of the printing plates in their respective ends. If the printing plate end is angled at the inclusion of a right angle, the feeding and Abstellides the suction cups advantageously radially to the axis of rotation of the printing cylinder. If the end is angled at an angle greater than 90 °, it is advantageous if the supply and Abstellraum also has a direction tangential to the printing cylinder directional component.
  • FIG. 1 shows a view into a printing tower of a wet offset web-fed rotary printing press.
  • two printing form cylinder 1 in the exemplary embodiment plate cylinder, two printing units, which are arranged one above the other in the printing tower and on the same side of a printing tower passing Bechristbahn work.
  • the printing form cylinder 1 are each in a conventional manner with a plurality of axially juxtaposed printing plates 2, in the embodiment printing plates, covered.
  • the printing forme cylinders 1 are each assigned a suction device 5.
  • the further printing forme cylinders of the printing machine is assigned in the same way individually to a suction device 5.
  • a suction device 5 For example, in an eight-printing tower with four printing bridges arranged one above the other for perfecting and correspondingly eight printing cylinders 1, at least eight suction devices 5 are likewise arranged.
  • Each of the suction devices 5 extends over the entire length of the associated printing form cylinder 1 and is able to handle all the printing plates 2 of the associated printing form cylinder 1, namely to keep it sucking. In the following, only one of the suction devices 5 will be described as representative of the others.
  • the suction device 5 comprises a traverse 6, which extends over the entire length of the associated printing forme cylinder 1 and is fixedly mounted at its two axial ends on side frame parts 4.
  • the traverse 6 forms a slender, elongated, on both sides firmly clamped bearing bar.
  • the traverse 6 serves as a carrier for a plurality of suction cups 10 and rollers 11.
  • the suction cups 10 and rollers 11 are juxtaposed parallel to the printing form cylinder 1 along the traverse 6, one of the suction cups 10 between two of the rollers 11.
  • the suction device 5 is per printing plate 2 equipped with two suction cups 10 and three rollers 11.
  • the suction cups 10 and rollers 11 form per printing plate 2 a suction cup / roller group 10, 11.
  • the suction device 5 forms axially adjacent suction cup / roller groups 10, 11 in a number of juxtaposed on the plate cylinder 1 printing plates 2 corresponding number ,
  • the suction cup / roller groups 10, 11 are movable in and against a directed to the respective printing plate 2 pressing direction, ie, switched on and off.
  • the suction cups 10 are movable relative to the rollers 11 and the rollers 11 relative to the suction cups 10 in and against the pressing direction.
  • the pressing direction has at least substantially radially on the axis of rotation of the associated printing forme cylinder 1.
  • FIG. 2 shows an axial end portion of the suction device 5 detached from the machine, for example, in a state intended for installation.
  • the suction cups 10 are axially stretched, and each form a correspondingly axially elongated bowl volume. In the embodiment, they are oval, each with a straight central portion and semi-circular ends.
  • the suction cups 10 are dimensionally and materially elastic. By pressing against the printing plate 1, the suction cups 10 are elastically compressed. If the pressing force is removed, the suction cups 10 expand elastically again.
  • the cup volume enclosed between the printing form 2 and the wall of the suction cups 10 is expanded so that a negative pressure and thus between the suction cups 10 and the printing plate 2 each set a certain suction force due to the cup edge contacting the printing plate 2 in the enclosed bowl volume , If a pulling force directed away from the printing form 1, preferably a pulling force directed against the pressing direction, is exerted on the suction cups 10, this can lead to a further increase in volume and thus to an increasing suction force.
  • the suction cups 10 are designed according to size, shape and material so that the sum of the suction forces of the suction cups 10 per group sufficient for secure holding a single printing plate 2.
  • the suction force per group is further so great that by means of the suction device 5, the respective printing forme 2 can be sucked in at one end and pulled without further tools or manual support from a clamping channel of the plate cylinder 1. If the suction device 5 per printing plate 2 only have a single suction cup, this suction cup would of course be sized so that its suction sufficient for this purpose. With more than two suction cups per group, the individual suction cup may be correspondingly weaker and / or smaller in size.
  • Each of the suction cups 10 is connected via a fluid line 12 with the immediate vicinity of the suction device 5.
  • the openings of the fluid lines 12 can be seen in the Napfvolumina.
  • the fluid lines 12 each open centrally and extend from their mouths in the cup volumes on the shortest path through the attachment region of each of the suction cups 10. For sucking and holding the printing plate 2, the fluid lines 12 are closed.
  • the Napfvolumina can be short-circuited via the fluid lines 12 to the environment and thereby deactivated or switched inactive in advance.
  • the axes of rotation of the rollers 11 are parallel to the axis of rotation of the associated printing forme cylinder 1, so that they can roll in the mounted state of the suction device 5 in the circumferential direction of the associated printing forme cylinder 1 on the printing plates 2, as for a roll over a printing plate 2 to its attachment and a Transport of the printing form 2 when rolling from the printing form cylinder 1 is desirable.
  • the suction device 5 forms a multi-part bearing structure, which consists of the already mentioned traverse 6 and further comprising a roller bearing structure 7 and a suction cup bearing structure 8.
  • the traverse 6 is used to attach the suction device 5 in the machine frame.
  • the rollers 11 are fixed to the common roller-bearing structure 7, which is supported on the cross member 6.
  • the roller-bearing structure 7 extends over the entire, assignable with printing plates 2 axial length of the plate cylinder 1. It is formed as a rigid beam from which protrude in the pressing direction stator on which the rollers 11 are rotatably mounted.
  • the suction cups 10 form a suction cup group.
  • the suction cups 10 are supported together on the suction cup bearing structure 8, which extends over the entire axial length of the plate cylinder 1, which is assignable to the printing plates 2.
  • the suction cup bearing structure 8 is supported directly on the traverse 6 and relative to this against the printing form cylinder 1 undeliverable and offset from the printing form cylinder 1.
  • one of the two bearing structures 7 and 8 could also be supported on the traverse 6 only via the other.
  • a separate bearing structure 8 or a separate bearing structure 7 is provided per suction pad group or per roller group, and each of the bearing structures 7 or 8 can be switched on and off independently of the others.
  • the suction cup groups each associated with one of the printing plates 2 are separated pneumatically.
  • the movements of the bearing structures 7 and 8 are fluidly, preferably pneumatically effected as in the embodiment.
  • an adjusting device 15 and for the switching on and off of the bearing structure 8 an adjusting device 16 is provided.
  • the adjusting devices 15 and 16 are connected to a compressed air reservoir, as is usually the case in printing presses.
  • the bearing structures 7 and 8 are each individually by means of actuators, in the embodiment of the pneumatic cylinder, the adjusting means 15 and 16 moves.
  • the control members of the adjusting devices 15 and 16 are preferably two-way valves whose switching states are controlled by a suitably electronic control. The electronic control offers the possibility of manual operation directly at the location of the relevant suction device. 5
  • the beam-shaped traverse 6 extending in the axial direction and the roller bearing structure 7 are U-profiles which are open in the direction of the associated printing-plate cylinder 1.
  • the U-profile of the traverse 6 takes up the roller bearing structure 7 at least substantially.
  • the suction cup bearing structure 8 is accommodated at least in the retracted state in the U-profile of the roller bearing structure 7.
  • the suction cup bearing structure 8 may be formed as a U-profile and receive the bearing structure 7. It can also be formed as U-profiles all three bearing structures 6, 7 and 8.
  • U-profile should also encompass other trough-shaped profiles, for example a V-profile or an H-profile, although the latter is less preferred since it requires more height.
  • at least two of the bearing structures 6, 7 and 8 or, if appropriate, also all three bearing structures 6, 7 and 8 could each be formed as simply elongated plates which are thin radially to the printing form cylinder 1.
  • the side legs of the U-profile act advantageously but stiffening.
  • the nested arrangement with at least partial overlap allows radially to the printing form cylinder 1 a particularly flat construction of the suction device. 5
  • FIG. 3 shows a pneumatic circuit for inactivating a single group of suction cups 10.
  • the suction cups 10 are vented by shorting to the environment A, ie the surrounding atmosphere, more specifically vented to ambient pressure.
  • the fluid lines 12 branch off from a common group fluid line 13 to the individual suction cups 10 of the group and each open into one of the cup volumes.
  • a two-way solenoid valve is arranged as the fluidic control member 14, which closes the group fluid line 13 in one of its two switching states, so that the cup volumes of the suction cup group are fluidically separated from the environment A, and opens in its other switching state, so that the short circuit to the environment A is made.
  • the fluidic control member 14 is controlled by the electronic control mentioned in connection with the adjusting devices 15 and 16 in coordination with the adjusting and control members for the bearing structures 7 and 8.
  • the moving actuator of the fluidic control member 14 is biased by a built-in spring in the closed position.
  • the change of a printing plate 2 is semi-automatically performed, namely partially manually by an operator and partially automatically by the printing plate 2 associated suction 5 according to the operation by the operator on site.
  • the operator After the printing form cylinder 1 has been rotated by pressing a button with its single clamping channel or one of several distributed over the cylinder circumference provided clamping channels in a favorable position for manual access, the operator preferably places the leading end of the printing plate 2 in the clamping channel of the plate cylinder 1.
  • the further clamping operation that is, the winding of the printing form 2 and the placement of the other printing form end by means of the suction device. 5 automatically.
  • the rollers 11 of the associated suction cup / roller group 10, 11 are pressed against the printing plate 2 by the group for this group 10, 11 or all groups 10, 11 jointly provided roller bearing structure 7 is extended by pressing the operator.
  • the printing form cylinder 1 is also rotated forward by pressing a button.
  • rollers 11 roll over the printing form 2 and apply them to the surface of the plate cylinder 1.
  • the rollers 11 roll over the trailing end of the printing plate 2, so that it is pressed into the clamping channel or another clamping channel of the printing form cylinder 1 and thereby automatically fixed, preferably by clamping.
  • the printing form cylinder 1 For the expansion of the printing form 2, the printing form cylinder 1 is rotated to a position in which one of the two ends of the printing form 2 comes to lie radially below the suction device 5, preferably the trailing end in printing operation end of the printing plate 2. With the printing forme cylinder in position. 1 is pressed by pressing the operator of the abinneden printing form 2 associated group of suction cups 10 against the printing plate 2. The suction cups 10 of the group in question or in the preferred storage variant all suction cups 10 are elastically compressed by the pressure of the pressing force. If all the suction cups 10 of the suction device 5 extend together, by means of the fluidic control members 14 those suction cup groups which are to suck in a printing plate 2 are set to active and the others to inactive.
  • the previously pressed-on suction cups 10 are moved back against pressing direction again by pressing a button or by automatic sequence control, so that the sucked end of the printing plate 2 is lifted out of the clamping channel.
  • the operator takes over the suctioned end and deactivated by pressing a button and thereby effected venting the suction cups 10.
  • the printing form cylinder 1 is rotated back while the operator holds the printing form 2 until the leading end of the printing form 2 of the operator can be gripped and pulled out of its clamping channel.
  • the suction device 5 does not have passive, but via active suction cups 10 and a vacuum generator, by means of which the Napfvolumina be sucked to suck the printing plates 2 and hold.
  • a vacuum generator can be connected via the group fluid lines 13 and fluid lines 12 to the individual suction cups 10.
  • suction lines may be provided.
  • suction cups 10 which are to receive and hold a printing plate 2 are sucked off, and those suction cups 10, which are not also to exercise a holding function, are acted upon by an overpressure to a suction of a printing plate 2 through the To prevent particular suction cups 10 particularly safe.
  • FIG. 4 shows one of the clamping channels of the plate cylinder 1 in a cross section.
  • a clamping device is arranged, by means of which a leading end 2v of a printing plate 2 and a trailing end 2n of the same or another printing plate 2 are clamped in the clamping channel.
  • the trailing end 2n is angled at an angle of slightly more than 90 ° and protrudes with the angled flange at least substantially, ie with a deviation of not more than 20 ° to the radial on the axis of rotation of the plate cylinder 1 in the clamping channel.
  • the angled flange of the pressure forming end 2n is flat and is not deformed by the clamping device, but merely clamped frictionally.
  • the suction cup bearing structure 8 is deliverable at least substantially parallel to the angled flange against the printing form cylinder 1 and supported by the printing form cylinder 1 ab plausible on the cross member 6.
  • the angled flange of the pressure forming end 2n is clamped by means of a clamping piece 20 movably mounted in the clamping channel of the clamping device, which has a flange contacting clamping surface for linear contact and additionally a support surface and on the support surface radially to the axis of rotation of Printing forme cylinder 1 is supported. More precisely, the clamping piece 20 is guided in a guide 21 of the printing form cylinder 1 at least substantially in the tangential direction. As a result, the clamping piece exerts on the clamped flange of the pressure forming end 2n only one determined by the strength of a spring 22 clamping force. The spring 22 acts in the direction of the guide 21.
  • the guide 21 has obliquely to the radial R of the plate cylinder 1 to the outside and includes with the radial R an acute angle a of more than 45 °; In this sense, the guide extends at least substantially tangentially to the axis of rotation of the plate cylinder 1, so that when pulling out of the flange, an inhibition is prevented.
  • the trailing pressure-forming end 2n can be pulled out of the tensioning channel, in particular, solely on account of the suction effect of the suction device 5 and without additional actuation of the clamping device.
  • FIG. 5 shows the nested arrangement of the bearing structures 6, 7 and 8 and further details of the suction cups 10.
  • the roller bearing structure 7 whose actuator 15 is shown.
  • the suction cup bearing structure 8 of the pneumatic actuator of the adjusting device 16 is not shown, the connection with the actuator is only indicated at 18.
  • the suction device 5 in particular the suction cup 10 shown as representative of the other, is shown to a printing plate 2 in its delivered position after sucking the trailing end 2n.
  • the suction force S acting on the printing form 2 along the axis PS of the feeding and stopping movement engages in the greatest possible proximity on the angled, trailing end 2n of the printing form 2.
  • the distance of the axis PS to the edge of the trailing end 2n is chosen to be as small as possible.
  • the suction cup 10 is designed for this purpose in a special way.
  • the pressure surface 2 facing contact surface of the suction cup 10 has at its the angled end 2n facing side of the movement axis PS a maximum distance a, measured between the movement axis PS and the outer peripheral edge of the suction cup 10, which is at most 20mm, preferably at most 15mm. Apart from a small distance, the suction cup 10 at its outer peripheral edge of the edge of the trailing End 2n, the suction force S attacks at a distance a from the edge of the trailing end 2n.
  • the thickness d of the contact surface measured transversely to the axial direction PS of the printing plate cylinder 1 should not be more than 8 mm, preferably not more than 5 mm, at least in the region of the suction cup 10 which is closest to the edge of the trailing end 2n.
  • the removability of the printing plate 2 alone by means of the suction device 5 is further beneficial if the angled flange e has the shortest possible length.
  • the flange length e should not be more than 14 mm and is preferably at most 10 mm.
  • the angled flange closes with the planning in the unloaded state printing form 2 a right angle.
  • the suction force S which coincides with the direction of the Abstell Gay, has parallel to the angled flange.
  • the extraction of the pressure forming end 2n is further beneficial that when pulling out first the roller bearing structure 7 in direction S by means of the adjusting device 15 is accelerated and in this movement by means of a stop member 17 in a stop contact with the suction cup not yet in motion at this time Bearing structure 8 passes, so that acts on the suction cup bearing structure 8 acting in the direction S impact force.
  • the impact force is advantageous for overcoming the static friction acting on the clamped flange of the pressure forming end 2n.
  • the stop member 17 shown as an additional element, which is due to the fact that the suction cup bearing structure 8 is wholly or partially received in the roller bearing structure 7, at least in the retracted state.
  • the adjusting devices 15 and 16 are arranged on the side of the traverse 6, which faces the bearing structures 7 and 8. Instead, the adjusting devices 15 and 16 or at least one of these adjusting devices 15 and 16 can also be arranged to save space on the same side as the bearing structures 7 and 8 and protrude in the direction of the supply and Abstellterrorism the suction cups 10 and rollers 11 of the traverse 6.
  • the suction device 5 is equipped both for the roller bearing structure 7 and for the suction cup bearing structure 8, each with two pneumatic actuators. Depending on one of the actuators is outside of the assignable with printing plates 2 axial section of the plate cylinder 1 in the two axial end portions of the cross member 6 is attached. In the exemplary embodiment, the two pairs of actuators are arranged on both sides of the plate cylinder 1 in the two pin areas. If the printing form cylinders 1 are equipped with bearer rings, as in the exemplary embodiment, the actuators and preferably the further fluidic members of the actuators 15 and 16 are each arranged on the outside of the bearer rings so that they do not overlap the cylinder peripheral surface, in particular in their axial section that can be set with printing plates 2 Take up space.
  • the Fluidik interviewedglieder 14 and optionally further Fluidik interviewedglieder are arranged behind the casing of the machine frame 4. Between the arranged on both sides of the pressure range actuators 15 and 16 extend only the fluid lines.
  • Venturi nozzles are formed directly to the suction cups to produce the negative pressure by means of the usual air pressure of the existing local air pressure system, either a Venturi nozzle per suction cup 10 or per Saugnapfrios. Otherwise, for suction devices with active suction cups preferably the above statements apply to the passive suction cups. It takes the place of suction by elastic expansion of the Napfvolumina only the active suction by applying a negative pressure, ie by evacuation.

Landscapes

  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Screen Printers (AREA)
  • Handling Of Sheets (AREA)
  • Rotary Presses (AREA)

Claims (24)

  1. Machine à imprimer avec un support de garnitures d'impression (1), sur lequel une première garniture d'impression (2) et une deuxième garniture d'impression (2) peuvent être déposées avec un décalage l'une par rapport à l'autre dans une direction axiale, et avec un dispositif d'aspiration (5) comprenant:
    a) une première ventouse (10) pour la première garniture d'impression (2),
    b) une deuxième ventouse (10) disposée avec un décalage en direction axiale par rapport à la première ventouse (10), pour la deuxième garniture d'impression (2),
    c) et un dispositif fluidique (12-14), au moyen duquel les ventouses (10) peuvent être mises en dépression ou déchargées d'une dépression indépendamment l'une de l'autre,
    caractérisée par
    d) une structure de support de ventouses (8) commune aux ventouses (10), sur laquelle la première ventouse (10) et la deuxième ventouse (10) sont appuyées et peuvent ainsi être approchées et écartées en bloc.
  2. Machine à imprimer selon la revendication précédente, comprenant en outre une traverse (6) s'étendant en direction axiale, dans laquelle la structure de support de ventouses (8) appuyée sur la traverse (6), et sur laquelle la première et la deuxième ventouses (10) sont montées, peut être approchée du support de garnitures d'impression (1) et écartée du support de garnitures d'impression (1) par rapport à la traverse (6).
  3. Machine à imprimer selon la revendication précédente, caractérisée en ce que la traverse (6) présente en section transversale un profil ouvert vers le support de garnitures d'impression (1), de préférence un profil en forme d'auge, dans lequel la structure de support de ventouses (8) est logée au moins sur une grande partie de sa hauteur mesurée dans la direction d'approche et d'écartement (P, S), dans une position écartée du support de garnitures d'impression (1).
  4. Machine à imprimer selon l'une quelconque des deux revendications précédentes, comprenant en outre un dispositif de réglage de ventouses (16) pour l'approche et l'écartement de la structure de support de ventouses (8).
  5. Machine à imprimer selon la revendication précédente, caractérisée en ce que le dispositif de réglage de ventouses (16) est disposé en direction axiale à l'extérieur d'une partie axiale du support de garnitures d'impression (1) recevant les garnitures d'impression (2).
  6. Machine à imprimer selon l'une quelconque des deux revendications précédentes, comprenant en outre une commande, qui commande le dispositif de réglage de ventouses (16) et le dispositif fluidique (12-14) pour l'enlèvement de la première garniture d'impression (2), de telle manière que les ventouses (10) soient approchées en commun et que, parmi la première ventouse (10) et la deuxième ventouse (10), seule la première ventouse (10) sous mise sous dépression.
  7. Machine à imprimer selon l'une quelconque des trois revendications précédentes, comprenant en outre une commande, qui commande le dispositif de réglage de ventouses (16) et le dispositif fluidique (12-14) pour un enlèvement de la première garniture d'impression (2), de telle manière que les ventouses (10) soient approchées en commun et que la deuxième ventouse (10) soit reliée à l'atmosphère ou soit mise en surpression, tandis que la première ventouse (10) aspire la première garniture d'impression (2).
  8. Machine à imprimer selon l'une quelconque des six revendications précédentes, caractérisée en ce que les ventouses (10) sont maintenues en commun sur la structure de support de ventouses (8) et peuvent être approchées et écartées en bloc avec la structure de support de ventouses (8).
  9. Machine à imprimer selon l'une quelconque des revendications précédentes, comprenant en outre un premier galet (11) pour la première garniture d'impression (2), un deuxième galet (11) pour la deuxième garniture d'impression (2), une traverse (6) s'étendant en direction axiale et une structure de support de galets (7) appuyée sur la traverse (6), sur laquelle au moins un des galets (11) est maintenu et qui peut être approchée contre le support de garnitures d'impression (1) et écartée du support de garnitures d'impression (1) par rapport à la traverse (6).
  10. Machine à imprimer selon la revendication précédente, comprenant en outre un dispositif de réglage de galets (15) permettant d'approcher et d'écarter la structure de support de galets (7).
  11. Machine à imprimer selon la revendication précédente, caractérisée en ce que le dispositif de réglage de galets (15) est disposé en direction axiale à l'extérieur d'une partie axiale du support de garnitures d'impression (1) recevant les garnitures d'impression (2).
  12. Machine à imprimer selon l'une quelconque des trois revendications précédentes, caractérisée en ce que la traverse (6) présente en section transversale un profil ouvert vers le support de garnitures d'impression (1), de préférence un profil en forme d'auge, dans lequel la structure de support de galets (7) est logée au moins sur une grande partie de sa hauteur mesurée dans la direction d'approche et d'écartement (P, S), dans une position écartée du support de garnitures d'impression (1).
  13. Machine à imprimer selon l'une quelconque des revendications précédentes, en combinaison avec la revendication 2 et la revendication 9, caractérisée en ce que la structure de support de galets (7) présente un élément de butée (17), avec lequel elle vient en contact de butée contre la structure de support de ventouses (8) encore approchée lors d'un mouvement d'écartement, dans le cas où la structure de support de ventouses (8) est approchée.
  14. Machine à imprimer selon l'une quelconque des revendications précédentes, en combinaison avec la revendication 2 et la revendication 9, caractérisée en ce qu'au moins une, de la structure de support de galets (7) et de la structure de support de ventouses (8), présente un profil ouvert vers le support de garnitures d'impression (1), dans lequel l'autre, de la structure de support de galets (7) et de la structure de support de ventouses (8), est logée au moins sur une grande partie de sa hauteur mesurée dans la direction d'approche et d'écartement (P, S), dans une position écartée du support de garnitures d'impression (1).
  15. Machine à imprimer selon l'une quelconque des revendications précédentes, en combinaison avec la revendication 2 et la revendication 9, caractérisée en ce que la traverse (6), la structure de support de galets (7) et la structure de support de ventouses (8) sont emboîtées l'une dans l'autre, au moins sur une grande partie de leur hauteur mesurée dans la direction d'approche et d'écartement (P, S), dans une position de la structure de support de galets (7) et de la structure de support de ventouses (8) écartée du support de garnitures d'impression (1).
  16. Machine à imprimer selon l'une quelconque des revendications précédentes, en combinaison avec une des revendications 2 et 9, caractérisée en ce que la traverse (6) n'est pas mobile.
  17. Machine à imprimer selon l'une quelconque des revendications précédentes, caractérisée en ce que chacune des garnitures d'impression (2) présente à une extrémité (2n) une aile coudée, plate au moins à l'état non chargé, avec laquelle la garniture d'impression respective (2) peut être fixée sur le support de garnitures d'impression en étant pincée dans un canal de serrage du support de garnitures d'impression (1), et en ce que les ventouses (10) peuvent être écartées dans une direction (S), qui est au moins essentiellement parallèle à l'aile, de telle manière qu'en cas de desserrage de la garniture d'impression respective (2), seules des forces au moins essentiellement de traction agissent dans son aile.
  18. Machine à imprimer selon la revendication précédente, caractérisée en ce que l'aile n'est pincée que par friction dans le canal de serrage.
  19. Machine à imprimer selon l'une quelconque des revendications précédentes, caractérisée en ce que le support de garnitures d'impression (1) est un cylindre porte-clichés et chacune des garnitures d'impression (2) présente une aile coudée, avec laquelle elle peut être fixée sur le support de garnitures d'impression (1) en étant pincée dans un canal de serrage du support de garnitures d'impression (1), et en ce qu'un dispositif de serrage est disposé dans le canal de serrage et comprend chaque fois au moins une pièce de serrage (20) pour la garniture d'impression (2) à pincer dans le canal de serrage, pièce qui présente une surface de contact de pinçage agissant contre l'aile de la garniture d'impression respective (2) et présente en outre une surface d'appui et est appuyée sur la surface d'appui en direction radiale du support de garnitures d'impression (1), afin d'empêcher un coincement de l'aile pincée lors d'un enlèvement de la garniture d'impression respective (2).
  20. Machine à imprimer selon l'une quelconque des revendications précédentes, caractérisée en ce que les ventouses (10) sont déformables élastiquement et se fixent par aspiration sur la garniture d'impression associée (2) par un élargissement élastique après une déformation réduisant le volume de ventouse respectif.
  21. Machine à imprimer selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif fluidique (12-14) comporte des conduites de fluide (12, 13) débouchant dans les ventouses (10) et des organes de commande fluidiques (14) pour les conduites de fluide (12, 13), et en ce que les organes de commande fluidiques (14) ferment les conduites de fluide (12, 13), ou les relient à un générateur de dépression pour aspirer les garnitures d'impression (2), et les ouvrent pour réduire la force d'aspiration.
  22. Machine à imprimer selon la revendication précédente, caractérisée en ce que les conduites de fluide (12, 13) relient les ventouses (10) à un générateur de pression ou à l'atmosphère (A) pour réduire la dépression.
  23. Machine à imprimer selon l'une quelconque des deux revendications précédentes, caractérisée en ce que les organes de commande fluidiques (14) sont chaque fois des soupapes à plusieurs voies à commande magnétique ou électrique.
  24. Procédé pour enlever une garniture d'impression (2) d'un support de garnitures d'impression (1) d'une machine à imprimer au moyen d'un dispositif d'aspiration (5) selon l'une quelconque des revendications précédentes, dans lequel a) une extrémité pincée (2n) de la garniture d'impression (2) est dégagée d'un dispositif de pinçage avec le support de garnitures d'impression
    (1) au moyen d'un dispositif d'aspiration associé (10), b) une extrémité opposée de la garniture d'impression (2) est ensuite dégagée à la main, et c) la garniture d'impression (2) est enlevée à la main du support de garnitures d'impression (1).
EP05740752A 2004-05-10 2005-05-06 Machine a imprimer comprenant un dispositif d'aspiration, dispositif d'aspiration et procede pour remplacer une garniture d'impression Revoked EP1753621B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08170977A EP2080618A3 (fr) 2004-05-10 2005-05-06 Presse dotée d'un dispositif d'aspiration, dispositif d'aspiration et procédé de changement d'une plaque d'impression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004023434A DE102004023434A1 (de) 2004-05-10 2004-05-10 Rotationsdruckmaschine mit Saugvorrichtung, Saugvorrichtung und Verfahren zum Wechseln einer Druckform
PCT/EP2005/004937 WO2005110754A1 (fr) 2004-05-10 2005-05-06 Machine a imprimer comprenant un dispositif d'aspiration, dispositif d'aspiration et procede pour remplacer une garniture d'impression

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP08170977A Division EP2080618A3 (fr) 2004-05-10 2005-05-06 Presse dotée d'un dispositif d'aspiration, dispositif d'aspiration et procédé de changement d'une plaque d'impression

Publications (3)

Publication Number Publication Date
EP1753621A1 EP1753621A1 (fr) 2007-02-21
EP1753621B1 true EP1753621B1 (fr) 2008-12-10
EP1753621B8 EP1753621B8 (fr) 2009-06-03

Family

ID=34967163

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EP05740752A Revoked EP1753621B8 (fr) 2004-05-10 2005-05-06 Machine a imprimer comprenant un dispositif d'aspiration, dispositif d'aspiration et procede pour remplacer une garniture d'impression
EP08170977A Withdrawn EP2080618A3 (fr) 2004-05-10 2005-05-06 Presse dotée d'un dispositif d'aspiration, dispositif d'aspiration et procédé de changement d'une plaque d'impression

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EP08170977A Withdrawn EP2080618A3 (fr) 2004-05-10 2005-05-06 Presse dotée d'un dispositif d'aspiration, dispositif d'aspiration et procédé de changement d'une plaque d'impression

Country Status (7)

Country Link
US (1) US20080190311A1 (fr)
EP (2) EP1753621B8 (fr)
AT (1) ATE416921T1 (fr)
DE (2) DE102004023434A1 (fr)
DK (1) DK1753621T3 (fr)
ES (1) ES2318488T3 (fr)
WO (1) WO2005110754A1 (fr)

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Also Published As

Publication number Publication date
WO2005110754A1 (fr) 2005-11-24
DK1753621T3 (da) 2009-04-14
EP2080618A2 (fr) 2009-07-22
ES2318488T3 (es) 2009-05-01
US20080190311A1 (en) 2008-08-14
EP1753621B8 (fr) 2009-06-03
ATE416921T1 (de) 2008-12-15
DE502005006215D1 (de) 2009-01-22
EP2080618A3 (fr) 2010-07-21
DE102004023434A1 (de) 2005-12-08
EP1753621A1 (fr) 2007-02-21

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