EP1695931B1 - Device for separating printing plates - Google Patents
Device for separating printing plates Download PDFInfo
- Publication number
- EP1695931B1 EP1695931B1 EP06114361A EP06114361A EP1695931B1 EP 1695931 B1 EP1695931 B1 EP 1695931B1 EP 06114361 A EP06114361 A EP 06114361A EP 06114361 A EP06114361 A EP 06114361A EP 1695931 B1 EP1695931 B1 EP 1695931B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction
- elements
- stack
- bar
- printing plates
- 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.)
- Expired - Lifetime
Links
Images
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
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/48—Air blast acting on edges of, or under, articles
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Pile Receivers (AREA)
Description
Die Erfindung betrifft eine Einrichtung zum Vereinzeln von blattartigen, flächigen Elementen, insbesondere von zu belichtenden Druckplatten, von einem Stapel derartiger Elemente, bevorzugt für eine automatische Ladevorrichtung für einen Druckplattenbelichter, mit einem Organ zur Erfassung des im Stapel jeweils oberen bzw. vorderen Elementes wenigstens im Verlauf eines Randes.The invention relates to a device for separating sheet-like, sheet-like elements, in particular of printing plates to be exposed, from a stack of such elements, preferably for an automatic loading device for a printing platesetter, with an organ for detecting the stack in the upper or front element at least in Course of a border.
Insbesondere für das automatische Laden eines Druckplattenbelichters, bevorzugt zur Belichtung von Druckplatten für die Verwendung in einer Offset-Druckmaschine, aber auch in anderen Speicherbereichen, werden blattartige, flächige Elemente in einem Stapel bereitgehalten bzw. bevorratet, sei es flach übereinander liegend oder aneinanderlehnend und stehend. Unabhängig von der Oberflächenbeschaffenheit kommt es dabei zumeist zu flächigen Anhaftungen aufeinanderfolgender Elemente, wobei die jeweilige Oberflächenbeschaffenheit Anhaftungen oder sogar Verklebungen noch begünstigen kann. Für einen Ladevorgang müssen aber derartige Elemente üblicherweise nacheinander vereinzelt, also jeweils vom Stapel getrennt werden. Dies muss zuverlässig geschehen, sollen nicht im nachfolgenden Arbeitsschritt Störungen auftreten. Für einen automatischen Ladevorgang soll auch die zuverlässige Trennung wie der Ladevorgang selbst vom Automatismus selbst gewährleistet sein, ohne dass eine Überwachung oder ein Eingriff durch eine Bedienungsperson erfolgen muss, wodurch der Automatismus durchbrochen und insgesamt in Frage gestellt würde.In particular, for the automatic loading of a printing platesetter, preferably for the exposure of printing plates for use in an offset printing machine, but also in other storage areas, sheet-like, flat elements in a stack are kept or stockpiled, be it flat over each other or leaning against each other and standing , Irrespective of the surface condition, surface adhesions of successive elements are usually the result, with the respective surface condition still being able to promote adhesions or even adhesions. For a charging process, however, such elements usually have to be singulated one after the other, that is, each time separated from the stack. This must be done reliably, should not occur in the subsequent step interference. For an automatic charging process, the reliable separation, such as the charging process itself, should also be ensured by the automatism itself, without any monitoring or intervention Intervention by an operator must be done, whereby the mechanism would be broken and questioned as a whole.
Diese geforderte Zuverlässigkeit ist insbesondere bei so genannten Autoloadern für Druckplattenbelichter nicht zufrieden stellend verwirklicht und daher ein Problempunkt.This required reliability is not satisfactorily realized especially in so-called autoloaders for platesetter and therefore a problem.
In der
Die Platte wird zunächst gemeinsam von allen Saugfüßen einer Saugplatte angesaugt, während sich diese Saugfüße dafür in einer Ebene befinden. Die Saugplatte wird dann mit der angesaugten Druckplatte deformiert. Hierbei werden die Saugfüße im Bereich des Druckplattenrandes aus der gemeinsamen Saugebene verfahren, während Saugfüße im zentralen Bereich der Druckplatte in der ursprünglichen Ebenen verbleiben. Durch diese Vorrichtung und dieses Verfahren wird die Druckplatte als Ganzes verformt, wofür eine komplexe Anordnung und eine aktive Steuerung der Saugfüße und der Saugplatte notwendig ist.The plate is first sucked together by all suction feet of a suction plate, while these suction feet are for it in a plane. The suction plate is then deformed with the sucked pressure plate. Here, the suction feet are moved in the region of the pressure plate edge from the common sowing level, while suction feet remain in the central region of the pressure plate in the original levels. By this device and this method, the pressure plate is deformed as a whole, for which a complex arrangement and an active control of the suction feet and the suction plate is necessary.
In der
In der
In der
Der Erfindung liegt die Aufgabe zugrunde, bei einer Einrichtung der eingangs genannten Gattung, die Zuverlässigkeit, vorzugsweise kostengünstig und mit relativ einfachen Mitteln bzw. Umbaumaßnahmen, zu verbessern.The invention is based on the object at a device of the type mentioned, the reliability, preferably cost and with relatively simple means or conversion measures to improve.
Diese Aufgabe wird in Vorrichtungshinsicht erfindungsgemäß durch eine Einrichtung gelöst, bei der beim Trennen des im Stapel oberen bzw. vorderen Elementes vom Stapel dieses vom Stapel zu trennende Element in einem Randbereich ausgebuchtet, aufgewölbt, ausgebeult oder sonst wie ausgebogen wird.This object is achieved in device according to the invention by a device in which when separating the top of the stack or front element from the stack of this stacked from the stack element in a peripheral area, bulged, bulged or otherwise bent out.
Wesentlich dabei ist, dass im Randverlauf die flächige Anhaftung des abzunehmenden Elementes am nächstfolgenden Element lokal über einen Abschnitt durchbrochen und gelöst wird, so dass sich diese Störung mit Vorteil beim weiteren Abnehmen leicht fortpflanzt. Bei dem Versuch eines gleichmäßigen oder mittigen Erfassens des flächigen Elementes würde sich ein Luftunterdruck ausbilden, der die Anhaftung begünstigt und verstärkt und sich so einem weiteren Abtrennen des Elementes widersetzt. Wird jedoch, wie erfindungsgemäß vorgesehen, der Randverlauf des abzunehmenden Elementes ausgebuchtet, so kommt es zu lokalen Verwerfungen oder Faltenbildungen, die in günstiger Weise die Anhaftungstendenz stören.It is essential that the surface adhesion of the abzunehmenden element on the next element is broken and broken locally over a section in the edge course, so that this disorder easily propagates with advantage in further weight loss. In an attempt to uniformly or centrally detecting the sheet member, an air pressure would form, which promotes the adhesion and reinforced and thus opposes a further separation of the element. However, if, as provided by the invention, the edge contour of the abzunehmenden element bulged, it comes to local distortions or wrinkles, which disturb the tendency to attach in a favorable manner.
Ein Erfassungsorgan ist dafür derart ausgestaltet, dass der von ihm erfasste Randverlauf des erfassten Elementes wenigstens in einem Abschnitt gewölbt ist.A detection element is designed for this purpose, that the edge profile of the detected element detected by it is arched at least in one section.
Es sind prinzipiell die verschiedensten Erfassungselemente denkbar, die so angeordnet oder ausgebildet sein könnten, dass die beim erfindungsgemäßen Verfahren entstehende lokale Störung verwirklicht wird. Denkbar sind zum Beispiel häkchenartige Klauen, Klammern, Reibschlußfinger oder-laschen oder dergleichen mehr.In principle, the most diverse detection elements are conceivable, which could be arranged or designed such that the local interference arising in the method according to the invention is realized. For example, hook-like claws, clamps, frictional fingers or lugs or the like are conceivable.
Häufig werden zum Erfassen und Anheben von blattartigen Elementen Saugelemente vorgesehen, die in verschiedenen Anordnungen oder Anzahlen vorhanden sein könnten. Gerade auch bei Verwendung derartiger Saugelemente kann, wie nach einer Weiterbildung der erfindungsgemäßen Einrichtung vorgesehen, die Erfindung mit einfachen Mitteln und wenigen Veränderungen zuverlässig verwirklicht werden, indem wenigstens eines der Saugelemente weiter von der Oberfläche des anzusaugenden Elementes beabstandet ist als andere der Saugelemente. Bis zu diesem weiter entfernten Saugelement ist der Ansaugweg, der vom Element zurückgelegt wird, größer, so dass sich automatisch an dieser Stelle eine Ausbuchtung oder Auswölbung im Element ergibt, weil das Element an anderen, mehr oder weniger benachbarten Saugelementen eher anschlägt und sich daher gezwungenermaßen durchbiegen muss. Dabei reichen schon einige wenige Millimeter Wegunterschied zumeist aus. Dieser Wegunterschied kann in baulich besonders und überraschend einfacher und kostengünstiger Weise zum Beispiel dadurch erreicht werden, dass bei dem beabstandeteren Saugelement lediglich eine Unterlegscheibe weniger verwendet wird, so dass diese als Distanzstück wegfällt.Often suction elements are provided for detecting and lifting sheet-like elements, which could be present in various arrangements or numbers. Especially when using such suction elements can, as provided according to a development of the device according to the invention, the invention with simple means and few changes reliably be realized by at least one of the suction elements is further spaced from the surface of the element to be sucked than other of the suction elements. Up to this more remote suction element, the suction path, which is covered by the element, larger, so that automatically at this point a bulge or bulge in the element results because the element at other, more or less adjacent suction elements rather abuts and therefore forced must bend. It is already sufficient for a few millimeters path difference mostly. This path difference can be achieved in structurally particularly and surprisingly simple and cost-effective manner, for example, by the fact that only one washer is less used in the more spaced-apart suction element, so that it is omitted as a spacer.
Wenigstens ein Luftblasorgan wird erfindungsgemäß bevorzugt dem zu erwartenden Aufwölbungsbereich des zu erfassenden Elementes, also bspw. einem beabstandeteren Saugelement, zugeordnet positioniert. Es können auch weitere Luftblasorgane dort oder im weiteren Umfeld angeordnet werden.At least one air blowing element according to the invention is preferably positioned in relation to the expected bulging region of the element to be detected, that is to say, for example, a spaced-apart suction element. It can also be arranged further air blowing organs there or in the wider environment.
Eine nächste Weiterbildung sieht vor, dass sich das wenigstens eine Luftblasorgan über die gesamte Tiefe des Stapels erstreckt und diesen belüftet und so eine Trennbarkeit der Elemente im gesamten Stapel vorbereitet und unterstützt.A next development provides that the at least one air blowing element extends over the entire depth of the stack and aerates it and thus prepares and supports a separability of the elements in the entire stack.
Die Trennung des erfassten Elementes wird daher unterstützt und verstärkt, indem von der Stoßkante des ausgebuchteten Randes her Luft zwischen das abzutrennende Element und den Stapel geblasen wird.The separation of the detected element is therefore assisted and amplified by blowing air between the element to be separated and the stack from the abutting edge of the notched edge.
Der gesamte Stapel wird quer zu den Stoßkanten der Elemente belüftet. Die Elemente sind vorzugsweise aneinanderlehnend zu einem Stapel gestellt, wobei die Elemente jeweils an ihrem unteren Rand zum Vereinzeln erfasst werden und entsprechend bevorzugt auch von unten belüftet werden, indem der Stapel auf einen oder mehrere Lüftungsschlitze gestellt ist.The entire stack is vented transversely to the abutting edges of the elements. The elements are preferably placed against each other to form a stack, wherein the elements are each detected at its lower edge for separating and are preferably also ventilated from below by the stack is placed on one or more ventilation slots.
Ein Ausführungsbeispiel, aus dem sich weitere erfinderische Merkmale ergeben, auf das die Erfindung in Ihrem Umfang aber nicht beschränkt ist, ist in der Zeichnung dargestellt. Es zeigen schematisch:
- Fig. 1
- eine Unteransicht eines Stapels aus Druckplatten mit einem Erfassungsorgan und
- Fig. 2
- einen Schnitt durch den Stapel gemäß
Fig. 1 entlang der inFig. 1 mit II - II bezeichneten strichpunktierten Linie.
- Fig. 1
- a bottom view of a stack of printing plates with a detecting member and
- Fig. 2
- a section through the stack according to
Fig. 1 along the inFig. 1 with II - II designated dash-dotted line.
Die
Für die Vereinzelung und Erfassung der Druckplatte ist ein Erfassungsorgan 2 vorgesehen, das Bestandteil einer nicht näher dargestellten Ladeeinrichtung eines ebenfalls nicht dargestellten Druckplattenbelichters sein kann. Das Erfassungsorgan 2 besteht im wesentlichen aus einer Leiste 3, die schwenkbeweglich um eine zu ihrer Erstreckung verlaufende Schwenkachse angeordnet sein kann, um durch eine Schwenkbewegung das Abnehmen der vorderen Druckplatte 1', welches in der
Wie insbesondere
Claims (6)
- An apparatus for separating flat elements from a stack of such elements, comprising a gripping device for gripping the respective upper or front element of the stack at least along an edge, wherein the gripping device (2) includes a bar (3) and at least a first suction element (4) and at least a second suction element (5), which are arranged at the bar, characterized in that the second suction element (5) has a smaller distance to the bar (3) than the first suction element (4), the distance is held constant with regard to structure, during continuous operation, so that the second suction element (5) is spaced further away from the surface of the element (1') to be sucked in than the first suction element (4) and thus a greater suction path is produced for the element (1'), so that the acquired element (1') is curved at least in the region of the suction elements (5) because of the suction paths varying in size.
- The apparatus according to claim 1, characterized in that the acquisition device (2) has spacers between the bar (3) and the first and second suction elements (4 and 5) which, with regard to structure, render possible the distances of the suction elements (4, 5) to the bar (3) and thus the differences in the suction path of the element (1') to the suction elements (4, 5).
- The apparatus according to claim 2, characterized in that the spacers are washers.
- The apparatus as claimed in any one of the preceding claims, characterized in that the flat elements are printing plates to be exposed which are to be loaded in a printing plate exposure device.
- The apparatus according to one of the claims 1 to 4, characterized by an air blowing element (12) which blows air under the acquired element (1') being assigned to at least one curved section of the acquired element (1').
- The apparatus according to claim 5, characterized in that the air blowing element (12) has an exit slot (15) extending over the entire height of the stack, transversely with respect to the butt edges of the elements (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10104078A DE10104078A1 (en) | 2001-01-29 | 2001-01-29 | Process and device for separating printing plates |
EP01130773A EP1232976B1 (en) | 2001-01-29 | 2001-12-22 | Method and device for separating printing plates |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01130773A Division EP1232976B1 (en) | 2001-01-29 | 2001-12-22 | Method and device for separating printing plates |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1695931A1 EP1695931A1 (en) | 2006-08-30 |
EP1695931B1 true EP1695931B1 (en) | 2009-09-30 |
Family
ID=7672192
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01130773A Expired - Lifetime EP1232976B1 (en) | 2001-01-29 | 2001-12-22 | Method and device for separating printing plates |
EP06114361A Expired - Lifetime EP1695931B1 (en) | 2001-01-29 | 2001-12-22 | Device for separating printing plates |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01130773A Expired - Lifetime EP1232976B1 (en) | 2001-01-29 | 2001-12-22 | Method and device for separating printing plates |
Country Status (4)
Country | Link |
---|---|
US (1) | US6739588B2 (en) |
EP (2) | EP1232976B1 (en) |
JP (1) | JP2002316737A (en) |
DE (3) | DE10104078A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004018180A (en) * | 2002-06-17 | 2004-01-22 | Dainippon Screen Mfg Co Ltd | Slip sheet taking out device |
DE10330010B4 (en) * | 2003-07-03 | 2006-09-07 | Heidelberger Druckmaschinen Ag | Device for lifting individual flat objects, in particular printing plates to be exposed |
US20050179763A1 (en) * | 2004-02-18 | 2005-08-18 | Mccarthy Robert | Media handling |
DE102004015195A1 (en) * | 2004-03-29 | 2005-11-03 | Heidelberger Druckmaschinen Ag | Device for separating printing plates |
JP2006176287A (en) * | 2004-12-22 | 2006-07-06 | Fuji Photo Film Co Ltd | Automatic supply device of photosensitive printing plate |
JP4584305B2 (en) * | 2005-02-14 | 2010-11-17 | 本田技研工業株式会社 | Separation method of plate material |
US7475875B2 (en) * | 2005-07-28 | 2009-01-13 | Heidelberger Druckmaschinen Ag | Apparatus and method for separating printing plates |
US7604231B2 (en) * | 2007-01-30 | 2009-10-20 | Eastman Kodak Company | Method and apparatus for separating media combinations from a media stack |
EP2163384A3 (en) | 2008-09-15 | 2010-04-14 | Heidelberger Druckmaschinen AG | Plate separation with magnetic fields |
DE102010051198A1 (en) | 2010-11-12 | 2011-03-03 | Heidelberger Druckmaschinen Ag | Device for conveying printing plate to imaging device, has blowing air device arranged at front side of printing plate stack and comprising flat-spray nozzles with lateral opening angle of greater than ninety degrees |
JP2013245108A (en) * | 2012-05-30 | 2013-12-09 | Fuji Xerox Co Ltd | Container for storing media and image forming apparatus |
US20180229871A1 (en) * | 2015-06-30 | 2018-08-16 | Kimberly-Clark Worldwide, Inc. | Tissue packaging apparatus |
EP3851279B1 (en) | 2020-01-20 | 2023-08-09 | Heidelberger Druckmaschinen AG | Device for handling printing plates on a printing machine |
DE102022106637A1 (en) | 2021-04-26 | 2022-10-27 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for separating printing plates |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
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US1289051A (en) * | 1918-12-24 | Miehle Printing Press & Mfg | Sheet-buckler. | |
US1112609A (en) * | 1914-10-06 | Harris Automatic Press Co | Sheet feed or separator. | |
US2108702A (en) * | 1933-10-26 | 1938-02-15 | Backhouse Headley Townsend | Automatic sheet feeding machinery |
US2231339A (en) * | 1939-03-28 | 1941-02-11 | Bliss E W Co | Sheet feeding mechanism |
US3275317A (en) * | 1964-05-01 | 1966-09-27 | Jr Frank H Fromm | Method and mechanism for transferring fabric blanks |
US3684276A (en) * | 1970-11-27 | 1972-08-15 | Picker X Ray Mfg Ltd | Film pickup system |
GB1517282A (en) * | 1974-06-13 | 1978-07-12 | Mel Equipment Co Ltd | Sheet-separating apparatus |
JPS5561542A (en) * | 1978-10-31 | 1980-05-09 | Hitachi Metals Ltd | Thin plate separating method |
JPS61136838A (en) * | 1984-12-07 | 1986-06-24 | Nippo Tsushin Kogyo Kk | Separating mechanism for piled-up plate members |
JPS63139834A (en) * | 1986-11-29 | 1988-06-11 | Fuji Photo Film Co Ltd | Sheet body separating mechanism |
JP2770188B2 (en) * | 1989-05-31 | 1998-06-25 | 株式会社ファブリカトヤマ | Sheet removal device |
JP2594651B2 (en) * | 1989-10-16 | 1997-03-26 | 富士写真フイルム株式会社 | Suction cup for sheet-fed sheet mechanism |
DE69032267T2 (en) * | 1990-01-12 | 1998-08-13 | Fuji Photo Film Co Ltd | Sheet feeding method and apparatus |
DE4002324A1 (en) * | 1990-01-26 | 1991-08-01 | Bayerische Motoren Werke Ag | Stacked metal sheet lifter - has edge suction units and inner spring on carrier to bend top sheet to break adhesion |
JP2545147B2 (en) * | 1990-01-29 | 1996-10-16 | 富士写真フイルム株式会社 | Single-wafer machine |
DE4210024A1 (en) * | 1992-03-27 | 1993-09-30 | Krause Biagosch Gmbh | Separation device for stacked printing sheets for copier machine - uses lifting tool with suction feet incorporated in flexible suction plate with upwards curved side edges |
US6345818B1 (en) * | 1998-10-26 | 2002-02-12 | Fanuc Robotics North America Inc. | Robotic manipulator having a gripping tool assembly |
US6431623B1 (en) | 1999-06-11 | 2002-08-13 | Honeywell International Inc. | Vacuum device for peeling off thin sheets |
US6398208B1 (en) * | 2000-06-12 | 2002-06-04 | Xerox Corporation | Sheet feeding apparatus having an air plenum with a leaky seal |
US6571709B1 (en) * | 2002-01-10 | 2003-06-03 | Agfa Corporation | Apparatus and method for picking printing plates of various sizes |
-
2001
- 2001-01-29 DE DE10104078A patent/DE10104078A1/en not_active Withdrawn
- 2001-12-22 EP EP01130773A patent/EP1232976B1/en not_active Expired - Lifetime
- 2001-12-22 DE DE50111270T patent/DE50111270D1/en not_active Expired - Lifetime
- 2001-12-22 DE DE50115149T patent/DE50115149D1/en not_active Expired - Lifetime
- 2001-12-22 EP EP06114361A patent/EP1695931B1/en not_active Expired - Lifetime
-
2002
- 2002-01-29 US US10/059,542 patent/US6739588B2/en not_active Expired - Fee Related
- 2002-01-29 JP JP2002020401A patent/JP2002316737A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US6739588B2 (en) | 2004-05-25 |
EP1232976B1 (en) | 2006-10-18 |
EP1695931A1 (en) | 2006-08-30 |
DE50111270D1 (en) | 2006-11-30 |
JP2002316737A (en) | 2002-10-31 |
DE10104078A1 (en) | 2002-08-01 |
EP1232976A3 (en) | 2004-01-02 |
EP1232976A2 (en) | 2002-08-21 |
DE50115149D1 (en) | 2009-11-12 |
US20020101027A1 (en) | 2002-08-01 |
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