EP2644542A1 - Procédé et dispositif destinés à séparer des plaques d'impression d'empilements de plaques d'impression - Google Patents

Procédé et dispositif destinés à séparer des plaques d'impression d'empilements de plaques d'impression Download PDF

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Publication number
EP2644542A1
EP2644542A1 EP13157349.5A EP13157349A EP2644542A1 EP 2644542 A1 EP2644542 A1 EP 2644542A1 EP 13157349 A EP13157349 A EP 13157349A EP 2644542 A1 EP2644542 A1 EP 2644542A1
Authority
EP
European Patent Office
Prior art keywords
printing plate
plate stack
printing
deviation
stack
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.)
Withdrawn
Application number
EP13157349.5A
Other languages
German (de)
English (en)
Inventor
André WIRTZ
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 EP2644542A1 publication Critical patent/EP2644542A1/fr
Withdrawn legal-status Critical Current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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0816—Suction grippers separating from the top of pile
    • B65H3/0833—Suction grippers separating from the top of pile and acting on the front part of the articles relatively to the final separating direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/12—Registering, e.g. orientating, articles; Devices therefor carried by article grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/20—Assisting by photoelectric, sonic, or pneumatic indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1083—Mechanical aspects of off-press plate preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/331—Skewing, correcting skew, i.e. changing slightly orientation of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/24—Irregularities, e.g. in orientation or skewness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/139—Piled package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1928—Printing plate

Definitions

  • the invention relates to a method for separating printing plates from a printing plate stack, wherein a printing plate is lifted by means of at least one removal member from the printing plate stack, the removal member moves the printing plate to a storage position and the printing plate is placed on a tray. Furthermore, the invention relates to a corresponding device for separating printing plates from a printing plate stack, comprising at least one removal member for lifting printing plates from the printing plate stack, preferably for carrying out said method.
  • printing plates stacked on top of one another and delivered in particular in such a stack must first be separated and then fed one at a time into a processing machine, in particular into a printing plate setter. This can be done manually or within an automatic loader.
  • a loader can be connected in front of the printing platesetter or modularly predocked.
  • the printing plates may be provided in cassettes or in the form of printing plate stacks on printing plate trays. If printing plates of a particularly large format are provided, these printing plates are provided on corresponding pallets as a printing plate stack. The separation then takes place in each case from the printing plate stack in a cassette on a tray or on a pallet.
  • lifting devices For separating the printing plates from the printing plate stack, for example, lifting devices are provided.
  • This lifting device may for example comprise suction elements which suck the objects.
  • suction elements By lifting the printing plates, these are separated if necessary with the aid of further elements and, if necessary, separated by intermediate layers or adhering to the uppermost printing plate further printing plates.
  • Corresponding lifting organs which are particularly suitable for separating printing plates and intermediate layers are for example in the US 7,559,544 B2 shown, which is hereby referred in particular to the embodiment of a lifting member.
  • a problem with the cited prior art is that in a misaligned printing plate stack, the printing plate at undefined positions by the removal organ, i. e.g. by suckers, is taken. This can cause damage to the particularly sensitive surfaces to be exposed.
  • the object of the present invention is therefore to reduce the disadvantages of the prior art at least.
  • the object of the present invention is achieved by a generic method, in which first the orientation of the printing plate stack is detected in the plane of the printing plates by means of at least one detecting member.
  • the at least one detection element may be For example, to act a camera that is provided above and or on at least one side of the printing plate stack. This camera can be provided in a continuation in particular also within the removal member or by this and thus each be moved simultaneously with the removal member to a position above the printing plate stack.
  • the detection member may also be one or more sensors in the edge region of the printing plate stack, which detect the position of the individual printing plates of the printing plate stack, ie the absolute position of the printing plate stack in the plane of the individual printing plates.
  • Such sensors may in particular also be comprised by the removal member and used by a corresponding movement of the removal member in a first direction for detecting a first edge of the printing plate stack and in a second direction which is substantially perpendicular to the first, for detecting a second edge of the printing plate stack become.
  • a hybrid arrangement of the detection member in the form of sensors and / or cameras, which are partially provided laterally and / or above the printing plate stack and / or comprises of a removal member is included according to the invention.
  • the orientation of the printing plate stack is compared with a desired orientation of the printing plate in the storage position. In this way, then at least one deviation of the detected orientation is determined by the target orientation.
  • the removal member now lifts the top pressure plate of the printing plate stack and moves it in the direction of a storage position on a shelf.
  • the pressure plate taken or lifted by this is now moved in response to the determined deviation of the printing plate stack so that the deviation thus determined is compensated before the storage of the printing plate in the storage position.
  • corresponding rotational movements and / or linear movements in the plane of the pressure plate are provided.
  • the printing plate can already be correctly aligned during the transport to the storage position; furthermore, no sensors and / or stops in the region of the storage position are necessary or not provided according to the invention.
  • the invention is correspondingly achieved by a generic device having at least one corresponding detection member for detecting an orientation of the printing plate stack.
  • the detection element may be at least one detection element, as has already been described above.
  • at least one storage means is provided, which is suitable for storing and providing the data of a target orientation of the printing plate in the storage position.
  • a comparison member which determines from this provided target orientation by comparison with the detected orientation of the printing plate stack a deviation of the printing plate stack and this determined deviation further to a correspondingly provided control member for driving the at least one removal member further, which then controls the removal member so in that the deviation is at least reduced.
  • the possible activations of the sampling device are those which result in movements as already described in relation to the method.
  • the removal member or the at least one removal member may, for example, be a single removal member which extends over the entire width of the pressure plate to be detected and, in a further embodiment, has individual suction heads which can absorb and lift the pressure plate with vacuum , These suction heads may, for example, continue to be designed to be movable in the direction of the extent of the removal member and / or in a direction perpendicular thereto. As a result, correspondingly determined deviations of the printing plate stack, which result in a corresponding deviation of the lifted printing plates, at least partially offset by corresponding movements.
  • the removal member extending over the entire width can be moved by means of two drive means provided substantially at the head ends, which can be driven and controlled essentially independently of one another, such that the entire pressure plate is moved by appropriate movements of the removal member Compensating movements learns as described above.
  • At least two sampling organs are included, which can be controlled separately from each other by at least one control member.
  • This control can for example be linear, so that by appropriate linear control of the removal organs a rotational movement and / or a linear movement of the raised pressure plate can be generated in its plane, so that the determined deviation is compensated.
  • the control of the here separate extraction organs is then analogous to a removal member, which as described above extends over the entire width of the pressure plate at least substantially.
  • the deviations which are to be compensated may be at least one deviation from the amount of inclination, longitudinal deviation in a first direction in the plane of the printing plate stack, preferably in a direction from the printing plate stack to the depositing position and lateral deviation in a direction transverse to act first direction.
  • Corresponding compensatory movements by the removal device can compensate for the deviations thus detected according to the invention.
  • the orientation of the printing plate stack substantially does not depend on an orientation that relates to a vertical with respect to the printing plate plane.
  • Such deviations can be deliberately provided by a printing plate stack is set obliquely with respect to a horizontal, in particular for storage for the printing plate.
  • a pre-alignment of the printing plate stack is carried out by applying the printing plate stack against an over the entire height of the printing plate stack extending stop.
  • it may also be an otherwise as in height deviation.
  • Such a deviation in height or a corresponding inclination of the printing plate stack can then be compensated solely by a lifting movement of the at least one removal member.
  • a corresponding method which is suitable to detect a deviation in the height, and accordingly is, for example, in the US Pat. No. 7,637,492 B2 described herein with respect to these methods.
  • deviations in one direction from the printing plate stack to the depositing position can be detected by setting a desired distance between a front and / or a rear edge of the printing plate stack to the depositing position. Deviations from this nominal distance are then correspondingly detected as a deviation in the direction thus defined.
  • the deviation of the printing plate stack is determined as a function of a position within the printing plate stack in a direction perpendicular to the plane of the printing plates themselves.
  • a deviation of the printing plate stack can be compensated for by corresponding movements of the lifted uppermost printing plate by means of a removal member, wherein the removal member extends substantially over the entire width of the printing plate.
  • a removal member wherein the removal member extends substantially over the entire width of the printing plate.
  • several, at least two removal organs are provided, which should take the top plate of the printing plate stack and achieve by appropriate movements of the removal organs movement of the pressure plate so that by linear movements of at least two sampling organs, or of essentially two Head ends of the one removal organ the determined deviation is compensated or at least reduced.
  • a further step provides for the at least one removal element to be the uppermost printing plate in dependence on the detected position of the printing plate stack, in particular in its height in an edge region of the printing plate grasps. In this way, printing images or other damage to beimaged areas of the printing plate can be successfully avoided.
  • the Fig. 1 shows printing plates 1, which are provided in a printing plate stack 2 for singulation.
  • This printing plate stack 2 is intended to be provided, for example, on a pallet 16 of a separating device, ie a loader.
  • the uppermost pressure plate 1 from the printing plate stack 2 is lifted by means of a removal member 3 and the removal member 3 has for this purpose at least sucker 11, which are movable in a direction perpendicular to the printing plate stack.
  • the suckers 11 can be acted upon by vacuum and can thus grip the pressure plate 1 in an edge region.
  • the removal member 3 can by means of a drive 12 in a direction away from the printing plate stack 2 to a storage position 4, which describes the positions of each of a front and rear edge of a printing plate 1 on a tray 5, are transported.
  • stationary sensors 6 are provided at least in an edge region of the printing plate stack 2 and above the printing plate stack 2.
  • the lifted uppermost pressure plate 1 is moved by means of the removal member 3 so that this deviation at the latest when filing the storage position 4 is balanced.
  • a beam 15, as it is for example in the DE 10 2009 020 102 A1 is described, provided in the edge region of the printing plate stack 2 for movement under the raised printing plate 1.
  • the joist is shown here only as an example. Its functioning and structure is more precise in the mentioned DE 10 2009 020 102 A1 described.
  • the so-isolated printing plate is then further supplied to an exposure drum 31 of a printing platesetter 30, clamped on this and imaged by means of an exposure head 32.
  • the tray 5 may be, for example, a surface of a pivotable table, as in the US 7,165,493 B2 or the US 7,370,582 B2 is described.
  • the printing plate 1 stored here can then be fed to the exposure drum 31 of a printing plate exposer 30, as described in the cited documents, to which reference is made.
  • Fig. 2 shows a corresponding device for separating the printing plates from above.
  • two detecting members 3 are shown.
  • Each detection member 3 may have an extension parallel to the front edge of the printing plate stack 2.
  • front edge is here meant the edge of the printing plate stack 2, which faces the tray 5.
  • Each detection member 3 may have a plurality of suckers 11, which are not visible here.
  • the uppermost printing plate 1 and also each further underlying printing plate 1 has an edge region 7 and a region 20 to be exposed.
  • the sensors 6, which are assigned here to the front and the lateral edge region of the printing plate stack 2, an alignment of the printing plate stack 2 and thus a precise position of the upper printing plate 1 can be detected.
  • This recognized position of the upper pressure plate 1 and the printing plate stack 2 is supplied to a comparison element 8.
  • the comparison element 8 is connected to a storage means 10.
  • the storage means 10 provides the reference member 8 a stored target position of the printing plate 1 in the storage position 4 on the tray 5 is available.
  • the comparison member 8 compares the determined orientation of the Printing plate stack 2 with the provided target position of the printing plate 1 and thus determines a defined in this way deviation of the printing plate stack 2. This deviation of the printing plate stack 2 is passed here together with the recognized position of the printing plate stack 2 to a control member 9 on.
  • the control member 9 is connected to drives 13 for driving the extraction members 3. By means of the drives 13, the removal organs 3 can each be moved independently in a first direction 21.
  • the direction 21 describes a direction from the printing plate stack 2 in the direction of the tray 5 or the storage position 4.
  • the removal elements 3 can also be moved in a direction 22 perpendicular to this first direction.
  • the control member 9 independently control the removal members 3 so that they each guided in a region of the edge region 7 of the printing plate 1, lowered here and means a vacuum loading of the nipple 11 can detect the top pressure plate 1 and take off.
  • the thus detected pressure plate 1 can be moved by means of the drives 13 through the removal members 3 in the first direction 21 to the storage position 4.
  • the control member 9 controls the drives 13 in response to the detected by the comparison element 8 deviation so that this deviation by linear movements of the removal organs 3 in the first direction 21 and / or in the second direction 22 perpendicular thereto before the deposition of the pressure plate 1 in the storage position 4 is balanced.
  • This compensation takes place advantageously already during the transport of the printing plate 1 to the storage position 4. Without sensors in the tray 5, the printing plate 1 is then stored without deviation from the stored in the storage means 10 target position in the storage position 4 and, as described above, correctly aligned to a printing plate cylinder 31 are supplied.
  • the Fig. 3 shows an alternative to the structure of the removal organs 3.
  • the same elements are described by the same reference numerals.
  • a single removal member 3 which extends substantially over the entire width of the printing plate 1.
  • width of the pressure plate 1 in this case the width of the front side of the pressure plate 1, ie the side of the pressure plate 1 is meant, which faces the tray 5 and the storage position 4.
  • the Removal member 3 in this case has a plurality of juxtaposed suckers 11. This sucker 11 can be moved independently in the first direction 21 and / or in the second direction 22 by means not shown here drive elements and thus allow a corresponding movement of a raised pressure plate 1.
  • the removal member 3 is connected to drives 14 at its end faces.
  • the removal member 3 can be connected by means of pistons 33 with these drives 14, these pistons themselves having holes 34 for receiving the removal member 3. These holes 34 are further associated with independent drive means 35 which allow movement of the removal member 3 in the second direction 22.
  • Both the drives 14 and the drive means 34 are, as in Fig. 2 described, connected to a corresponding control member 9.
  • the drives 14 and drive means 35 can be controlled such that during transport of the lifted by the suction pad 11 pressure plate 1 to the storage position 4 in the first direction 21, the determined deviation by corresponding linear movements of the drives 14 and drive means 35 both in the first direction 21 as well as in the second direction 22 are reduced or compensated by rotational and / or linear movements within the plane of the pressure plate 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP13157349.5A 2012-03-29 2013-03-01 Procédé et dispositif destinés à séparer des plaques d'impression d'empilements de plaques d'impression Withdrawn EP2644542A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012006273A DE102012006273A1 (de) 2012-03-29 2012-03-29 Verfahren und Vorrichtung zum Vereinzeln von Druckplatten von Druckplattenstapeln

Publications (1)

Publication Number Publication Date
EP2644542A1 true EP2644542A1 (fr) 2013-10-02

Family

ID=47900607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13157349.5A Withdrawn EP2644542A1 (fr) 2012-03-29 2013-03-01 Procédé et dispositif destinés à séparer des plaques d'impression d'empilements de plaques d'impression

Country Status (3)

Country Link
EP (1) EP2644542A1 (fr)
CN (1) CN103359499A (fr)
DE (1) DE102012006273A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016116362A1 (fr) * 2015-01-19 2016-07-28 Krones Aktiengesellschaft Procédé et dispositif de manipulation des couches intermédiaires individuelles
US10227187B2 (en) 2015-01-19 2019-03-12 Krones Aktiengesellschaft Method and device for handling individual intermediate layers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108639750A (zh) * 2018-07-09 2018-10-12 陈童 一种柔性材料的取料机构

Citations (7)

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Publication number Priority date Publication date Assignee Title
EP1044906A2 (fr) * 1999-04-16 2000-10-18 LTG Mailänder GmbH Méthode et dispositif pour séparer des objets plats et flexibles
US7165493B2 (en) 2003-12-18 2007-01-23 Heidelberger Druckmaschinen Ag Transport apparatus for printing plates including plate holder having two parallel, intercoupled holding decks
EP1980510A1 (fr) 2007-04-11 2008-10-15 Punch Graphix International N.V. Dispositif de chargement, section d'entrée, procédé pour le chargement d'une plaque d'impression, système informatique et produit de programme informatique
US7559544B2 (en) 2004-10-08 2009-07-14 Heidelberger Druckmaschinen Ag Device and method for singly separating printing plate of a stack
DE102009020102A1 (de) 2008-05-27 2009-12-03 Heidelberger Druckmaschinen Ag Vereinzelungsvorrichtung für Druckplatten
US7637492B2 (en) 2007-04-05 2009-12-29 Heidelberger Druckmaschinen Ag Method and device for separating printing plates from a stack
US20100065762A1 (en) * 2008-09-17 2010-03-18 Yossef Dror Detecting printing plate edge alignment

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DE60229822D1 (de) * 2001-09-26 2008-12-24 Fujifilm Corp Vorrichtung zur Positionierung eines Bogens und Bildaufzeichnungsvorrichtung
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JP4845658B2 (ja) * 2006-04-07 2011-12-28 キヤノン株式会社 シート搬送装置およびこれを備えた画像形成装置
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Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
EP1044906A2 (fr) * 1999-04-16 2000-10-18 LTG Mailänder GmbH Méthode et dispositif pour séparer des objets plats et flexibles
US7165493B2 (en) 2003-12-18 2007-01-23 Heidelberger Druckmaschinen Ag Transport apparatus for printing plates including plate holder having two parallel, intercoupled holding decks
US7370582B2 (en) 2003-12-18 2008-05-13 Heidelberger Druckmaschinen Ag Method for handling printing plates
US7559544B2 (en) 2004-10-08 2009-07-14 Heidelberger Druckmaschinen Ag Device and method for singly separating printing plate of a stack
US7637492B2 (en) 2007-04-05 2009-12-29 Heidelberger Druckmaschinen Ag Method and device for separating printing plates from a stack
EP1980510A1 (fr) 2007-04-11 2008-10-15 Punch Graphix International N.V. Dispositif de chargement, section d'entrée, procédé pour le chargement d'une plaque d'impression, système informatique et produit de programme informatique
DE102009020102A1 (de) 2008-05-27 2009-12-03 Heidelberger Druckmaschinen Ag Vereinzelungsvorrichtung für Druckplatten
US20100065762A1 (en) * 2008-09-17 2010-03-18 Yossef Dror Detecting printing plate edge alignment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016116362A1 (fr) * 2015-01-19 2016-07-28 Krones Aktiengesellschaft Procédé et dispositif de manipulation des couches intermédiaires individuelles
US10227187B2 (en) 2015-01-19 2019-03-12 Krones Aktiengesellschaft Method and device for handling individual intermediate layers

Also Published As

Publication number Publication date
DE102012006273A1 (de) 2013-10-02
CN103359499A (zh) 2013-10-23

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