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EP0284806A2 - Suction head with lifting suckers - Google Patents

Suction head with lifting suckers Download PDF

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Publication number
EP0284806A2
EP0284806A2 EP88103224A EP88103224A EP0284806A2 EP 0284806 A2 EP0284806 A2 EP 0284806A2 EP 88103224 A EP88103224 A EP 88103224A EP 88103224 A EP88103224 A EP 88103224A EP 0284806 A2 EP0284806 A2 EP 0284806A2
Authority
EP
European Patent Office
Prior art keywords
suction
nozzles
cups
double
head according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88103224A
Other languages
German (de)
French (fr)
Other versions
EP0284806B1 (en
EP0284806A3 (en
Inventor
Arno Wirz
Peter Sobotta
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 EP0284806A2 publication Critical patent/EP0284806A2/en
Publication of EP0284806A3 publication Critical patent/EP0284806A3/en
Application granted granted Critical
Publication of EP0284806B1 publication Critical patent/EP0284806B1/en
Anticipated expiration legal-status Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00Separating articles from piles
    • B65H3/08Separating articles from piles using pneumatic force
    • B65H3/0808Suction grippers
    • B65H3/0816Suction grippers separating from the top of pile

Definitions

  • suction lifters themselves are designed as jumping vacuums. All suction nozzles are set in such a way that they are at a short distance above the sheet stack. When working correctly, the top sheet is lifted from the stack due to the suction of the suction nozzles and pressed against the suction nozzles.
  • a vacuum is formed in the suction cups and in the entire suction pipe, which causes the detected sheet to lift off against the spring after exact sealing of all four suction cups, so that air can be blown under the raised sheet immediately thereafter.
  • the suction nozzles support the picking up of the top sheet of the stack by loosening blowers. After this When the top sheet is lifted, the suction cups transfer it to the suction cups, which convey the sheet in the direction of the first printing unit. With the correct setting, the four suction cups of the suction head are usually able to stopperlessly separate the top sheet from the stack in the speed range specified above. If one of the four suction cups is set inaccurately, stoppers can still occur because the vacuum in the suction pipe cannot develop.
  • the entire space to be acted upon with vacuum consisting of a suction pipe and four lifting suction devices, is so large that, especially when processing sheets that are sucking through, a sufficient negative pressure is built up, which then triggers the lifting suction device to jump up.
  • This time delay and the need to adjust and adjust all four suction cups exactly in relation to the uneven surface of the stack takes time and sometimes leads to pressure interruptions.
  • suction heads Another problem with the known suction heads is that the two internal suction nozzles are arranged relatively far apart. The suction of the air blown under the raised sheet therefore causes the trailing edge of the sheet to sag in this area, so that the sheet may not be passed flat to the suction device, which can cause the sheet to be deformed when the sheet is transported further by conveying means.
  • the object of the invention is to provide a suction head which processes and feeds all types of paper and cardboard trouble-free at high conveying speeds.
  • the suction nozzles of the suction lifters can be fitted so that they can be replaced so that the suction head can be quickly adapted to the respective optimal requirements. For example, easily separable papers can only be processed with two suction nozzles because the separation process is not difficult.
  • a continuous suction bar can also be provided on the double suction device of a lifting suction device.
  • Incorrect suction is particularly effectively avoided if suction nozzles and the suction bar are provided with wart suction cups, which in particular increase the suction safety of the two suction nozzles or the suction bar when paper is being sucked through.
  • the small, cup-shaped wart suction cups cause the vacuum chamber to be closed more quickly with less air.
  • the lifting suction device 1 shown in FIG. 1 has a cylindrical guide part 2 which is connected via a holder 3 to adjustable and adjustable parts of a suction head, not shown. Above the holder 3 there is a hose connection 4 for a hose, which leads to the vacuum generator. On the cylindrical surface of the guide part 2, the guide cylinder 5 slides the suction chamber 6.
  • the suction chamber 6 consists of the mentioned guide cylinder 5, the cross tube 7 and the two suction nozzles 8 and 9 attached to it. Suction nozzles 8 and 9 are covered with rubber rings 10 which are provided with wart suction devices 11. Suction chamber 6 and suction nozzles 8 and 9 together form the vertically movable double suction device 12.
  • a bore 13 is provided centrally as an air channel within the guide part 2, in which a shoulder 14 is incorporated, on which a spring 15 is supported, which rests with its lower end on the cross tube 7 and thus constantly presses the double suction device 12 into the lower working position .
  • the stroke length limits a resilient limit holder 16, which is inserted into an annular groove in the guide part 2. By pulling out this limit holder 16, the double suction device 12 can be removed from the guide part 2 of the lifting suction device 1 and can be exchanged for another normal suction nozzle part.
  • a shoulder 17 limits the stroke distance of the double suction device 12.
  • the double suction device 12 of the lifting suction device 1 is in its lower working position, the wart suction devices 4 of the suction nozzles 8 and 9 being just firmly closed by a suctioned-up bend 18.
  • a vacuum is now rapidly formed in the suction chamber 6, so that the double suction device 12 is sucked vertically upwards until the annular end face 19 of the guide cylinder 5 abuts the shoulder 17.
  • the sheet 18 has reached its upper position, in which it is different from those not shown Feeders can be taken over.
  • the vacuum chamber of the suction chamber 6 is ventilated, so that the vacuum breaks down and the sheet 18 is released by the wart suction devices 11.
  • the spring 15 then presses the double suction cup 12 back into the position shown in FIG. 1.
  • Figure 2 shows a lifting suction device 20 according to the invention, which differs from that in Figure 1 only in that the axis of symmetry 21 of the guide member 2 extends at a small acute angle to the vertical 22.
  • This outward inclined arrangement of the guide part 2 causes a slight movement from the suction head to the outside during the upward movement of the double suction device 12, so that when the sheet is lifted the middle part of the suction sheet 18 particularly exposed to the suction of the air is additionally tensioned.
  • this measure is not necessary because the closely spaced suction nozzles 8 and 9 of a double suction device 12 itself have a stabilizing effect on the sheet, and moreover the suction nozzle 9 is closer to the middle of the sheet than if the suction device 1 or 20 were only would be equipped with a normal suction nozzle.
  • the cross tube 7 of the suction chamber 6 can be designed on its underside such that it has a receptacle 23 for a rubber suction strip 24.
  • This suction bar 24 is also provided with wart suction cups 11.
  • the design of the suction chamber 6 is basically no different than in the case of two suction nozzles 8 and 9.
  • the advantage of the suction strip 24 is only that it can be applied somewhat more quickly than two rubber caps 10 of the suction nozzles 8 and 9.
  • several suction nipples suck in simultaneously (e.g. 10).
  • a suction head 25 is shown in dash-dotted lines, the control and drive means of which actuate the two suction cups 1 in accordance with the task.
  • the double suction cups 12 of the suction cups 1 are in their lowest position.
  • loose air is blown out of the nozzles 26 by two box loosening blowers 27 at the level of each suction nozzle 8 or 9, and as a result can be seen in FIG. 5 that the uppermost sheets 28 of the stack 29 are loosened.
  • the suction cups 1 and 2 are acted upon by suction air, the uppermost sheet 18 is sucked in by the suction nozzles 8 and 9 of the double suction cups 12. This position is shown in FIG.
  • the double suction devices 12 can be exchanged very quickly for single suction devices 33.
  • the box loosening blowers 27 are to be replaced by the tubular loosening blowers 34.
  • the vertically movable part of the suction cups 1 can also be designed as a triple suction cup, that is to say provided with three suction nozzles.
  • the suction cups can also be designed as drop suction cups, the double suction cups being brought down to the surface of the stack by negative pressure. It is particularly advantageous if the moving parts are made of plastic or light metal, because it is then possible to manufacture light and cheap double-stroke vacuums that react or start very quickly. Otherwise, all the new features mentioned in the description and shown in the drawing are essential to the invention, even if they are not expressly claimed in the claims.
  • suction cup 2 guide part 3 holders 4 hose connection 5 guide cylinders 6 suction chamber 7 cross tube 8 suction nozzle 9 suction nozzle 10 rubber ring 11 wart suckers 12 double suction cups 13 hole 14 shoulder 15 compression spring 16 limit holder 17 shoulder 18 sheets 19 ring face 20 suction cups 21 axis of symmetry 22 vertical 23 recording 24 suction bar 25 suction head 26 nozzles 27 loosening blower 28 sheets 29 stacks 30 line 31 suction cups 32 Position of the suction cups 33 single suction cups 34 loose wind players 35 cover cap

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Manipulator (AREA)

Abstract

Die Vorrichtung betrifft einen Saugkopf (25) mit höhenverstellbar angebrachten Hubsaugern (1). Jeder dieser Hubsauger weist einen Führungsteil (2) auf, der zur Führung einer axial verschiebbaren, teleskopartigen Saugkammer (6) dient. Diese Saugkammer weist quer zur Bogenförderrichtung nebeneinander angeordnete, zu Doppelsaugern vereinigte Saugdüsen (8, 9) auf, die über die Saugkammer kurzgeschlossen sind und somit einen eng begrenzten Unterdruckraum bilden. Mit solchen Doppelsaugern lassen sich selbst bei hohen Fördergeschwindigkeiten alle Papier- und Kartonsorten störungsfrei verarbeiten und genau zuführen. Die relativ schnell zu evakuierende Saugkammer zweier miteinander gekoppelter Saugdüsen ermöglicht eine hohe Reaktionsgeschwindigkeit des Saugkopfes.The device relates to a suction head (25) with height-adjustable suction cups (1). Each of these suction cups has a guide part (2) which serves to guide an axially displaceable, telescopic suction chamber (6). This suction chamber has suction nozzles (8, 9) which are arranged next to one another and transverse to the sheet conveying direction and which are combined to form double suction devices. With such double suction cups, all types of paper and cardboard can be processed and fed precisely, even at high conveying speeds. The suction chamber, which can be evacuated relatively quickly, of two suction nozzles coupled to one another enables a high reaction speed of the suction head.

Description

Moderne Bogenoffsetdruckmaschinen erreichen Arbeitsgeschwindigkeiten von 12.000 - 15.000 Druck pro Stunde. Bei Zuführung gut trennbarer Papiere können die Saugköpfe solcher Bogendruckmaschinen ohne Schwierigkeiten in diesen Geschwindigkeitsbereichen stopperlos arbeiten. Probleme stellen sich jedoch dann ein, sobald poröse Alpha-Papiere, schwerer Karton oder relativ dünnes Etikettenpapier vom Stapel zu trennen ist. Besondere Schwierigkeiten bereiten Papiere, die von der Palette verarbeitet werden. Saugköpfe mit nur zwei Hubsaugern können dann der Geschwindigkeit nicht folgen und werden stopperanfällig, weil der zu trennende Bogen nur an zwei Stellen angehoben wird, wodurch die Übergabegenauigkeit an die Fördersauger leidet.Modern sheetfed offset printing presses reach working speeds of 12,000 - 15,000 prints per hour. When feeding easily separable papers, the suction heads of such sheet-fed printing presses can work without stop in these speed ranges without difficulty. However, problems arise as soon as porous alpha paper, heavy cardboard or relatively thin label paper has to be separated from the stack. Papers that are processed by the pallet are particularly difficult. Suction heads with only two suction cups can then not follow the speed and are susceptible to stoppers because the sheet to be separated is only lifted at two points, which affects the transfer accuracy to the suction cups.

Zur Behebung dieses Mangels ist es bekannt, an einem gemeinsamen, vertikal verstellbaren Saugrohr vier Hubsauger anzubringen. Neben den üblichen, zu beiden Seiten des Saugkopfgehäuses vorgesehenen Hubsaugern sind also jeweils an jeder Seite ein weiterer Hubsauger an dem Saugrohr befestigt. Die Hubsauger selbst sind als Springsauger ausgebildet. Alle Saugdüsen sind derart eingestellt, daß sie sich in einem geringen Abstand oberhalb des Bogenstapels befinden. Bei korrekter Arbeitsweise wird der oberste Bogen aufgrund des Sogs der Saugdüsen vom Stapel abgehoben und gegen die Saugdüsen gepreßt. Durch Schließung der Saugdüsen bildet sich in den Springsaugern und im gesamten Saugrohr ein Unterdruck aus, der nach exakter Abdichtung aller vier Springsauger ein Abheben des erfaßten Bogens gegen die Feder bewirkt, so daß unmittelbar darauf Tragluft unter den angehobenen Bogen geblasen werden kann. Das Erfassen des jeweils obersten Bogens des Stapels durch die Saugdüsen wird durch Lockerbläser unterstützt. Nach dem Abheben des jeweils obersten Bogens übergeben die Hubsauger diesen an die Fördersauger, die den Bogen in Richtung des ersten Druckwerks weiterfördern. Die vier Hubsauger des Saugkopfes sind bei korrekter Einstellung in der Regel dazu in der Lage, in dem oben angegebenen Geschwindigkeitsbereich stopperlos den jeweils obersten Bogen vom Stapel zu trennen. Bei ungenauer Einstellung einer der vier Hubsauger können jedoch, da sich der Unterdruck im Saugrohr nicht auszubilden vermag, dennoch Stopper auftreten. Außerdem ist der gesamte mit Unterdruck zu beaufschlagende Raum, bestehend aus Saugrohr und vier Hubsaugern, derart groß, daß insbesondere bei Verarbeitung von durchsaugenden Bogen sehr verzögert ein hinreichender Unterdruck aufgebaut wird, der dann das Hochspringen der Hubsauger auslöst. Dieser Zeitverzug und die Notwendigkeit, alle vier Sauger exakt im Verhältnis zur unebenen Oberfläche des Stapels einzustellen und anzupassen, erfordert Zeitaufwand und führt zuweilen trotzdem zu Druckunterbrechungen.To remedy this defect, it is known to attach four lifting suction devices to a common, vertically adjustable suction pipe. In addition to the usual suction cups provided on both sides of the suction head housing, a further suction cup is attached to the suction pipe on each side. The suction lifters themselves are designed as jumping vacuums. All suction nozzles are set in such a way that they are at a short distance above the sheet stack. When working correctly, the top sheet is lifted from the stack due to the suction of the suction nozzles and pressed against the suction nozzles. By closing the suction nozzles, a vacuum is formed in the suction cups and in the entire suction pipe, which causes the detected sheet to lift off against the spring after exact sealing of all four suction cups, so that air can be blown under the raised sheet immediately thereafter. The suction nozzles support the picking up of the top sheet of the stack by loosening blowers. After this When the top sheet is lifted, the suction cups transfer it to the suction cups, which convey the sheet in the direction of the first printing unit. With the correct setting, the four suction cups of the suction head are usually able to stopperlessly separate the top sheet from the stack in the speed range specified above. If one of the four suction cups is set inaccurately, stoppers can still occur because the vacuum in the suction pipe cannot develop. In addition, the entire space to be acted upon with vacuum, consisting of a suction pipe and four lifting suction devices, is so large that, especially when processing sheets that are sucking through, a sufficient negative pressure is built up, which then triggers the lifting suction device to jump up. This time delay and the need to adjust and adjust all four suction cups exactly in relation to the uneven surface of the stack takes time and sometimes leads to pressure interruptions.

Problematisch ist bei den bekannten Saugköpfen weiterhin, daß die beiden innen liegenden Saugdüsen relativ weit voneinander entfernt angeordnet sind. Der Sog der unter den angehobenen Bogen geblasenen Tragluft bewirkt daher ein Durchhängen der Bogenhinterkante in diesem Bereich, so daß der Bogen unter Umständen nicht plan an die Fördersauger übergeben wird, wodurch es bei dem Weitertransport des Bogens mittels weiterfördernden Mitteln zu dessen Deformierung kommen kann.Another problem with the known suction heads is that the two internal suction nozzles are arranged relatively far apart. The suction of the air blown under the raised sheet therefore causes the trailing edge of the sheet to sag in this area, so that the sheet may not be passed flat to the suction device, which can cause the sheet to be deformed when the sheet is transported further by conveying means.

Aufgabe der Erfindung ist, einen Saugkopf zu schaffen, der bei hohen Fördergeschwindigkeiten alle Papier- und Kartonsorten störungsfrei verarbeitet und genau zuführt.The object of the invention is to provide a suction head which processes and feeds all types of paper and cardboard trouble-free at high conveying speeds.

Gelöst wird diese Aufgabe erfindungsgemäß mit den Merkmalen des Anspruchs 1.This object is achieved according to the invention with the features of claim 1.

Die Saugdüsen der Hubsauger können auswechselbar angebracht sein, so daß der Saugkopf den jeweiligen optimalen Erfordernissen rasch anzupassen ist. Beispielsweise kann die Verarbeitung leicht trennbarer Papiere lediglich mit zwei Saugdüsen erfolgen, weil der Trennvorgang keine Schwierigkeiten bereitet.The suction nozzles of the suction lifters can be fitted so that they can be replaced so that the suction head can be quickly adapted to the respective optimal requirements. For example, easily separable papers can only be processed with two suction nozzles because the separation process is not difficult.

Statt zweier Saugdüsen kann an dem Doppelsauger eines Hubsaugers auch eine durchgehende Saugleiste vorgesehen sein. Besonders wirksam werden Fehlansaugungen vermieden, wenn Saugdüsen und Saugleiste mit Warzensaugern versehen sind, die namentlich bei durchsaugendem Papier die Saugsicherheit der beiden Saugdüsen oder der Saugleiste zusätzlich erhöhen. Die kleinen, napfförmigen Warzensauger bewirken nämlich einen schnelleren Verschluß des Unterdruckraumes mit geringerer Luftmenge.Instead of two suction nozzles, a continuous suction bar can also be provided on the double suction device of a lifting suction device. Incorrect suction is particularly effectively avoided if suction nozzles and the suction bar are provided with wart suction cups, which in particular increase the suction safety of the two suction nozzles or the suction bar when paper is being sucked through. The small, cup-shaped wart suction cups cause the vacuum chamber to be closed more quickly with less air.

Weitere Vorteile der Erfindung sind:

  • a) Die bewegten Teile der Hubsauger nach der Erfindung weisen eine relativ geringe Masse auf und ermöglichen bei hohen Fördergeschwindigkeiten die zu fordernde Laufruhe.
  • b) Die mit Doppelsaugern versehenen Hubsauger sind schneller einstellbar als vier Einzelsauger, wodurch sich Rüstzeit einsparen läßt.
  • c) Die Luftwege in der Saugkammer sind kurz. Das Unterdrucksystem ist daher mit geringer Trägheit behaftet, so daß trotz hoher Fördergeschwindigkeit die Bogen sicher in der kurzen zur Verfügung stehenden Zeit angesaugt werden.
  • d) Der mittlere Bogenkantenbereich wird an einem Durchhängen zufolge des Sogs der Tragluft gehindert, weil einerseits bei Bestückung der beiden Hubsaugern mit den erfindungsgemäßen Doppelsaugern, die jeweils innenliegende Saugdüse näher zur Mitte angeordnet ist, als wenn die Hubsauger nur mit normalen Saugdüsen versehen wären, und weil andererseits die beiden eng beieinanderliegenden Saugdüsen eines Doppelsaugers nach der Erfindung eine stabilisierende Wirkung auf die Bogenhinterkante quer zur Bogenförderrichtung ausüben. Die plane Bogenübergabe des angehobenen Bogens an die Fördersauger ist damit gewährleistet.
Further advantages of the invention are:
  • a) The moving parts of the suction lifters according to the invention have a relatively low mass and enable the smoothness to be required at high conveying speeds.
  • b) The suction cups with double suction cups can be set faster than four single suction cups, which means that set-up time can be saved.
  • c) The airways in the suction chamber are short. The vacuum system is therefore subject to low inertia, so that despite the high conveying speed, the sheets are sucked safely in the short time available.
  • d) The middle arc edge area is prevented from sagging due to the suction of the air, because on the one hand, when the two suction cups are equipped with the double suction cups according to the invention, the internal suction nozzle is arranged closer to the center than if the suction cups were only provided with normal suction nozzles, and because, on the other hand, the two closely spaced suction nozzles of a double suction device according to the invention have a stabilizing effect on the trailing edge of the sheet transversely to the sheet conveying direction. This ensures the flat sheet transfer of the raised sheet to the suction cups.

Nachstehend werden einige Ausführungsformen der Erfindung anhand der Zeichnung erläutert:
Es zeigen:

  • Figuren 1 bis 4 Ausführungsformen von Hubsaugern nach der Erfindung.
  • Figuren 5 bis 7 Die Wirkungsweise von Hubsaugern nach der Erfindung.
  • Figur 8 Die Ausbildung eines Hubsaugers nach der Erfindung bei Verarbeitung kleiner Formate.
Some embodiments of the invention are explained below with reference to the drawing:
Show it:
  • Figures 1 to 4 embodiments of vacuum lifters according to the invention.
  • Figures 5 to 7, the operation of suction cups according to the invention.
  • Figure 8 The design of a vacuum cleaner according to the invention when processing small formats.

Der in Figur 1 dargestellte Hubsauger 1 weist einen zylindrischen Führungsteil 2 auf, der über einen Halter 3 mit verstellbaren und einstellbaren Teilen eines nichtdargestellten Saugkopfs verbunden ist. Oberhalb des Halters 3 befindet sich ein Schlauchanschluß 4 für einen Schlauch, der zum Unterdruckerzeuger führt. Auf der zylindrischen Oberfläche des Führungsteils 2 gleitet der Führungszylinder 5 der Saugkammer 6.The lifting suction device 1 shown in FIG. 1 has a cylindrical guide part 2 which is connected via a holder 3 to adjustable and adjustable parts of a suction head, not shown. Above the holder 3 there is a hose connection 4 for a hose, which leads to the vacuum generator. On the cylindrical surface of the guide part 2, the guide cylinder 5 slides the suction chamber 6.

Die Saugkammer 6 besteht aus dem erwähnten Führungszylinder 5, dem Querrohr 7 und den beiden an diesem befestigten Saugdüsen 8 und 9. Saugdüsen 8 und 9 sind mit Gummiringen 10 überspannt, die mit Warzensaugern 11 versehen sind. Saugkammer 6 sowie Saugdüsen 8 und 9 bilden gemeinsam den vertikal bewegbaren Doppelsauger 12.The suction chamber 6 consists of the mentioned guide cylinder 5, the cross tube 7 and the two suction nozzles 8 and 9 attached to it. Suction nozzles 8 and 9 are covered with rubber rings 10 which are provided with wart suction devices 11. Suction chamber 6 and suction nozzles 8 and 9 together form the vertically movable double suction device 12.

Innerhalb des Führungsteils 2 ist zentrisch eine Bohrung 13 als Luftkanal vorgesehen, in der eine Schulter 14 eingearbeitet ist, an der sich eine Feder 15 abstüzt, die mit ihrem unteren Ende auf dem Querrohr 7 aufliegt und somit den Doppelsauger 12 ständig in die untere Arbeitsstellung drückt. Die Hubstrecke begrenzt nach unten ein federnder Begrenzungshalter 16, der auf eine Ringnut im Führungsteil 2 gesteckt ist. Durch Herausziehen dieses Begrenzungshalters 16 kann der Doppelsauger 12 von dem Führungsteil 2 des Hubsaugers 1 abgezogen und gegen einen anderen normalen Saugdüsenteil ausgetauscht werden. Nach oben hin begrenzt eine Schulter 17 die Hubstrecke des Doppelsaugers 12.A bore 13 is provided centrally as an air channel within the guide part 2, in which a shoulder 14 is incorporated, on which a spring 15 is supported, which rests with its lower end on the cross tube 7 and thus constantly presses the double suction device 12 into the lower working position . The stroke length limits a resilient limit holder 16, which is inserted into an annular groove in the guide part 2. By pulling out this limit holder 16, the double suction device 12 can be removed from the guide part 2 of the lifting suction device 1 and can be exchanged for another normal suction nozzle part. At the top, a shoulder 17 limits the stroke distance of the double suction device 12.

In der dargestellten Arbeitsstellung befindet sich der Doppelsauger 12 des Hubsaugers 1 in seiner unteren Arbeitsstellung, wobei die Warzensauger 4 der Saugdüsen 8 und 9 gerade durch einen hochgesaugten Bogen 18 fest verschlossen sind. In der Saugkammer 6 bildet sich jetzt rasch ein Unterdruck, so daß der Doppelsauger 12 vertikal aufwärts gesogen wird, bis die Ringstirnfläche 19 des Führungszylinders 5 an der Schulter 17 anstößt. In dieser Stellung des Doppelsaugers 12 hat der Bogen 18 seine obere Stellung erreicht, in der er von den nichtdargestellten Fördersaugern übernommen werden kann. Bei diesem Übergabevorgang wird der Unterdruckraum der Saugkammer 6 belüftet, so daß der Unterdruck zusammenbricht und der Bogen 18 von den Warzensaugern 11 freigegeben wird. Danach drückt die Feder 15 den Doppelsauger 12 wieder in die in Figur 1 dargestellte Position.In the working position shown, the double suction device 12 of the lifting suction device 1 is in its lower working position, the wart suction devices 4 of the suction nozzles 8 and 9 being just firmly closed by a suctioned-up bend 18. A vacuum is now rapidly formed in the suction chamber 6, so that the double suction device 12 is sucked vertically upwards until the annular end face 19 of the guide cylinder 5 abuts the shoulder 17. In this position of the double suction device 12, the sheet 18 has reached its upper position, in which it is different from those not shown Feeders can be taken over. During this transfer process, the vacuum chamber of the suction chamber 6 is ventilated, so that the vacuum breaks down and the sheet 18 is released by the wart suction devices 11. The spring 15 then presses the double suction cup 12 back into the position shown in FIG. 1.

Figur 2 zeigt einen Hubsauger 20 nach der Erfindung, der sich von dem in Figur 1 lediglich dadurch unterscheidet, daß die Symmetrieachse 21 des Führungsteils 2 unter einem kleinen spitzen Winkel zur Vertikalen 22 verläuft. Diese nach außen gerichtete schräge Anordnung des Führungsteils 2 bewirkt bei der Aufwärtsbewegung des Doppelsaugers 12 eine leichte, vom Saugkopf nach außen fortgerichtete Bewegung, so daß beim Anheben des Bogens der mittlere, dem Sog der Tragluft besonders ausgesetzte Teil des angesaugten Bogens 18 zusätzlich gespannt wird. In der Regel ist diese Maßnahme nicht notwendig, weil die eng beieinanderliegenden Saugdüsen 8 und 9 eines Doppelsaugers 12 selbst schon eine stabilisierende Wirkung auf den Bogen ausüben, und außerdem die Saugdüse 9 der Mitte des Bogens näher liegt, als wenn der Hubsauger 1 oder 20 nur mit einer normalen Saugdüse bestückt wäre.Figure 2 shows a lifting suction device 20 according to the invention, which differs from that in Figure 1 only in that the axis of symmetry 21 of the guide member 2 extends at a small acute angle to the vertical 22. This outward inclined arrangement of the guide part 2 causes a slight movement from the suction head to the outside during the upward movement of the double suction device 12, so that when the sheet is lifted the middle part of the suction sheet 18 particularly exposed to the suction of the air is additionally tensioned. As a rule, this measure is not necessary because the closely spaced suction nozzles 8 and 9 of a double suction device 12 itself have a stabilizing effect on the sheet, and moreover the suction nozzle 9 is closer to the middle of the sheet than if the suction device 1 or 20 were only would be equipped with a normal suction nozzle.

Wie die figuren 3 und 4 zeigen, kann das Querrohr 7 der Saugkammer 6 an seiner Unterseite derart ausgeführt sein, daß es eine Aufnahme 23 für eine Saugleiste 24 aus Gummi aufweist. Diese Saugleiste 24 ist ebenfalls mit Warzensaugern 11 versehen. Die Ausbildung der Saugkammer 6 ist im Grunde nicht anders als bei zwei Saugdüsen 8 und 9. Der Vorteil der Saugleiste 24 ist lediglich, daß sie etwas schneller aufzubringen ist als zwei Gummikappen 10 der Saugdüsen 8 und 9. Außerdem saugen mehrere Saugwarzen gleichzeitig an (z.B. 10).As Figures 3 and 4 show, the cross tube 7 of the suction chamber 6 can be designed on its underside such that it has a receptacle 23 for a rubber suction strip 24. This suction bar 24 is also provided with wart suction cups 11. The design of the suction chamber 6 is basically no different than in the case of two suction nozzles 8 and 9. The advantage of the suction strip 24 is only that it can be applied somewhat more quickly than two rubber caps 10 of the suction nozzles 8 and 9. In addition, several suction nipples suck in simultaneously (e.g. 10).

In den Figuren 5, 6 und 7 ist strichpunktiert ein Saugkopf 25 dargestellt, dessen Steuer- und Antriebsmittel die beiden Hubsauger 1 aufgabengemäß betätigen. In der dargestellten Stellung nach Figur 5 befinden sich die Doppelsauger 12 der Hubsauger 1 in ihrer untersten Stellung. Wie aus Figur 6 zu entnehmen ist, wird aus den Düsen 26 von zwei Kastenlockerbläsern 27 auf der Höhe jeder Saugdüse 8 oder 9 der Doppelsauger 12 Lockerluft ausgeblasen und dadurch, wie aus Figur 5 zu ersehen ist, die obersten Bogen 28 des Stapels 29 aufgelockert. Sobald nun die Hubsauger 1 und 2 mit Saugluft beaufschlagt werden, erfolgt ein Ansaugen des obersten Bogens 18 durch die Saugdüsen 8 und 9 der Doppelsauger 12. Diese Stellung ist in Figur 1 gezeigt. Nach der Abdichtung der Saugdüsen 8 und 9 beider Doppelsauger 12 baut sich aufgrund der kurzen Luftwege in der Saugkammer 6 der Doppelsauger 12 rasch ein Unterdruck auf, der die Doppelsauger in die obere gestrichelte Position anhebt. Der Bogen 18 befindet sich dann auf der Höhe der strichpunktierten Linie 30. Zwei Fördersauger 31 übernehmen in der ausgezogenen Stellung den Bogen, worauf die Saugdüsen 8 und 9, wie zuvor beschrieben, belüftet werden und den Bogen 18 freigeben. Die Fördersauger 31 transportieren den erfaßten Bogen 18 bis in ihre strichpunktiert dargestellte Lage 32.5, 6 and 7, a suction head 25 is shown in dash-dotted lines, the control and drive means of which actuate the two suction cups 1 in accordance with the task. In the position shown in FIG. 5, the double suction cups 12 of the suction cups 1 are in their lowest position. As can be seen from FIG. 6, loose air is blown out of the nozzles 26 by two box loosening blowers 27 at the level of each suction nozzle 8 or 9, and as a result can be seen in FIG. 5 that the uppermost sheets 28 of the stack 29 are loosened. As soon as the suction cups 1 and 2 are acted upon by suction air, the uppermost sheet 18 is sucked in by the suction nozzles 8 and 9 of the double suction cups 12. This position is shown in FIG. After the suction nozzles 8 and 9 of both double suction devices 12 have been sealed, a vacuum is quickly built up due to the short airways in the suction chamber 6 of the double suction device 12, which raises the double suction devices to the upper dashed position. The sheet 18 is then at the level of the dash-dotted line 30. Two suction cups 31 take over the sheet in the extended position, whereupon the suction nozzles 8 and 9, as described above, are ventilated and release the sheet 18. The conveyor suction devices 31 transport the detected sheet 18 to the position 32 shown in broken lines.

Sollen Bogen, die leicht trennbar sind, mit hoher Geschwindigkeit verarbeitet werden, so können die Doppelsauger 12 sehr rasch gegen Einzelsauger 33 ausgetauscht werden. Dabei sind die Kastenlockerbläser 27 durch die rohrförmigen Lockerbläser 34 zu ersetzen.If sheets that are easily separable are to be processed at high speed, the double suction devices 12 can be exchanged very quickly for single suction devices 33. Here, the box loosening blowers 27 are to be replaced by the tubular loosening blowers 34.

Sind derart kleine Bogenformate von dem Saugkopf 25 zu verarbeiten, daß die äußeren Saugdüsen 8 von dem angesaugten Bogen 18 nicht abgedeckt würden, so läßt sich, wie aus Figur 8 zu ersehen ist, die Saugdüse 8 jedes Doppelsaugers 12 mit einer Abdeckkappe 35 verschließen. Da die Saugdüsen 8 und 9 symmetrisch zur Saugkammer 6 des Doppelsaugers 12 angeordnet sind, verhält sich das ganze Unterdrucksystem bei Abdecken und Verschließen der Saugdüsen 9 beider Doppelsauger 12 durch den Bogen 18 genauso, als würden auch die Saugdüsen 8 vom Bogen 18 ebenfalls abgedeckt. Es bildet sich sehr rasch symmetrisch ein Unterdruck aus, und die Doppelsauger 12 schnellen nach oben in die obere Position, um den Bogen 18 kleinen Formats in die Übergabestellung anzuheben. Natürlich müssen dann in einem solchen Falle die Fördersauger enger stehen, als in Figur 6 angedeutet. Der Vorteil dieser Ausführungsform der Erfindung ist, daß sich noch Formate verarbeiten lassen, die mit Bestückung der Hubsauger 1 mit normalen Einzelsaugdüsen nicht mehr erfaßt werden könnten.If such small sheet formats are to be processed by the suction head 25 that the outer suction nozzles 8 would not be covered by the sheet 18 sucked in, As can be seen from FIG. 8, close the suction nozzle 8 of each double suction device 12 with a cover cap 35. Since the suction nozzles 8 and 9 are arranged symmetrically to the suction chamber 6 of the double suction device 12, the entire vacuum system behaves in the same way when the suction nozzles 9 of both double suction devices 12 are covered and closed by the sheet 18, as if the suction nozzles 8 were also covered by the sheet 18. A vacuum is formed very quickly and symmetrically, and the double suction cups 12 soar upwards in order to raise the sheet 18 of small size into the transfer position. In such a case, of course, the suction cups must then be narrower than indicated in FIG. 6. The advantage of this embodiment of the invention is that formats can still be processed that could not be detected with normal suction nozzles when the suction cups 1 are fitted.

Die Erfindung ist natürlich nicht auf die veranschaulichten Ausführungsformen beschränkt, beispielsweise kann der vertikal bewegliche Teil der Hubsauger 1 auch als Tripelsauger, also mit drei Saugdüsen versehen, ausgebildet werden. Auch lassen sich die Hubsauger als Fallsauger ausführen, wobei die Doppelsauger durch Unterdruck auf die Oberfläche des Stapels herabgefahren würden. Besonders vorteilhaft ist, wenn die bewegten Teile aus Kunststoff oder Leichtmetall ausgeführt sind, weil sich dann leichte und billige Doppelhubsauger anfertigen lassen, die sehr schnell reagieren beziehungsweise anspringen. Im übrigen sind alle in der Beschreibung erwähnten und in der Zeichnung dargestellten neuen Merkmale erfindungswesentlich, auch soweit sie in den Ansprüchen nicht ausdrücklich beansprucht sind.The invention is of course not limited to the illustrated embodiments, for example the vertically movable part of the suction cups 1 can also be designed as a triple suction cup, that is to say provided with three suction nozzles. The suction cups can also be designed as drop suction cups, the double suction cups being brought down to the surface of the stack by negative pressure. It is particularly advantageous if the moving parts are made of plastic or light metal, because it is then possible to manufacture light and cheap double-stroke vacuums that react or start very quickly. Otherwise, all the new features mentioned in the description and shown in the drawing are essential to the invention, even if they are not expressly claimed in the claims.

TEILELISTEPARTS LIST

1 Hubsauger
2 Führungsteil
3 Halter
4 Schlauchanschluß
5 Führungszylinder
6 Saugkammer
7 Querrohr
8 Saugdüse
9 Saugdüse
10 Gummiring
11 Warzensauger
12 Doppelsauger
13 Bohrung
14 Schulter
15 Druckfeder
16 Begrenzungshalter
17 Schulter
18 Bogen
19 Ringstirnfläche
20 Hubsauger
21 Symmetrieachse
22 Vertikale
23 Aufnahme
24 Saugleiste
25 Saugkopf
26 Düsen
27 Kastenlockerbläser
28 Bogen
29 Stapel
30 Linie
31 Fördersauger
32 Lage der Fördersauger
33 Einzelsauger
34 Lockerbläser
35 Abdeckkappe
1 suction cup
2 guide part
3 holders
4 hose connection
5 guide cylinders
6 suction chamber
7 cross tube
8 suction nozzle
9 suction nozzle
10 rubber ring
11 wart suckers
12 double suction cups
13 hole
14 shoulder
15 compression spring
16 limit holder
17 shoulder
18 sheets
19 ring face
20 suction cups
21 axis of symmetry
22 vertical
23 recording
24 suction bar
25 suction head
26 nozzles
27 loosening blower
28 sheets
29 stacks
30 line
31 suction cups
32 Position of the suction cups
33 single suction cups
34 loose wind players
35 cover cap

Claims (8)

1. - Saugkopf mit höhenverstellbar angebrachten Hubsaugern,
- die je einen Führungsteil aufweisen,
- auf dem eine axial verschiebbare, teleskopartig geführte Saugkammer angeordnet ist,
- die mindestens zwei quer zur Bogenförderrichtung nebeneinander angeordnete, zu Doppelsaugern vereinigte Saugdüsen aufweist,
- die über die Saugkammer kurzgegschlossen sind, also einen eng begrenzten Unterdruckraum bilden.
1.- suction head with height-adjustable suction cups,
- each have a guide part,
on which an axially displaceable, telescopically guided suction chamber is arranged,
which has at least two suction nozzles arranged next to one another transversely to the sheet conveying direction and combined to form double suction devices,
- Which are short-circuited via the suction chamber, i.e. form a narrowly limited vacuum space.
2. Saugkopf nach Anspruch 1,
dadurch gekennzeichnet, daß
- die Saugdüsen auswechselbar angebracht sind.
2. suction head according to claim 1,
characterized in that
- The suction nozzles are replaceable.
3. Saugkopf nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
- die Saugdüsen symmetrisch zur Symmetrieachse der Saugkammer angeordnet sind.
3. suction head according to claim 1 or 2,
characterized in that
- The suction nozzles are arranged symmetrically to the axis of symmetry of the suction chamber.
4. Saugkopf nach einem oder mehreren der vorhergehenden Ansprüche 1-3,
dadurch gekennzeichnet, daß
- statt der beiden Saugdüsen eine durchgehende Saugleiste vorgesehen ist.
4. suction head according to one or more of the preceding claims 1-3,
characterized in that
- A continuous suction bar is provided instead of the two suction nozzles.
5. Saugkopf nach einem oder mehreren der vorhergehenden Ansprüche 1-4,
dadurch gekennzeichnet, daß - Saugdüsen oder Saugleisten mit Warzensaugern versehen sind.
5. suction head according to one or more of the preceding claims 1-4,
characterized in that - suction nozzles or suction strips are provided with wart suction cups.
6. Saugkopf nach einem oder mehreren der vorhergehenden Ansprüche 1-5,
dadurch gekennzeichnet,
daß am Saugkopf zwei Hubsauger mit zwei, zu einem Doppelsauger vereinigte Saugdüsen vorgesehen sind, wobei die jeweils außenliegende der zwei am Doppelsauger vorgesehenen Saugdüsen mit einer abnehmbaren Kappe abgedeckt ist.
6. suction head according to one or more of the preceding claims 1-5,
characterized,
that two suction cups are provided on the suction head with two suction nozzles combined to form a double suction device, the outermost of the two suction nozzles provided on the double suction device being covered with a removable cap.
7. Saugkopf nach einem oder mehreren der vorhergehenden Ansprüche 1-6,
dadurch gekennzeichnet, daß
- die Symmetrieachse des Führungsteils unter einem spitzen Winkel zur Vertikalen verläuft.
7. suction head according to one or more of the preceding claims 1-6,
characterized in that
- The axis of symmetry of the guide part runs at an acute angle to the vertical.
8. Saugkopf nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
- die Hubsauger als Spring- oder Fallsauger ausgebildet sind.
8. suction head according to one or more of the preceding claims,
characterized in that
- The suction cups are designed as spring or drop suction cups.
EP88103224A 1987-04-01 1988-03-03 Suction head with lifting suckers Expired - Lifetime EP0284806B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3710994 1987-04-01
DE19873710994 DE3710994A1 (en) 1987-04-01 1987-04-01 SUCTION HEAD WITH VACUUM CLEANERS

Publications (3)

Publication Number Publication Date
EP0284806A2 true EP0284806A2 (en) 1988-10-05
EP0284806A3 EP0284806A3 (en) 1990-08-08
EP0284806B1 EP0284806B1 (en) 1994-02-16

Family

ID=6324641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103224A Expired - Lifetime EP0284806B1 (en) 1987-04-01 1988-03-03 Suction head with lifting suckers

Country Status (7)

Country Link
US (1) US4869489A (en)
EP (1) EP0284806B1 (en)
JP (1) JPS63267630A (en)
CN (1) CN1016768B (en)
AU (1) AU1267288A (en)
CA (1) CA1310344C (en)
DE (2) DE3710994A1 (en)

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CN105538333A (en) * 2016-02-03 2016-05-04 上海发那科机器人有限公司 Robot vacuum pickup gripper

Also Published As

Publication number Publication date
CN88101578A (en) 1988-10-12
AU1267288A (en) 1988-10-06
EP0284806B1 (en) 1994-02-16
US4869489A (en) 1989-09-26
EP0284806A3 (en) 1990-08-08
DE3887767D1 (en) 1994-03-24
CN1016768B (en) 1992-05-27
CA1310344C (en) 1992-11-17
DE3710994A1 (en) 1988-10-13
JPS63267630A (en) 1988-11-04
DE3710994C2 (en) 1989-04-20

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