EP1041029B1 - Method and device for removing air inclusions during the formation of stacks of sheets - Google Patents

Method and device for removing air inclusions during the formation of stacks of sheets Download PDF

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Publication number
EP1041029B1
EP1041029B1 EP00105265A EP00105265A EP1041029B1 EP 1041029 B1 EP1041029 B1 EP 1041029B1 EP 00105265 A EP00105265 A EP 00105265A EP 00105265 A EP00105265 A EP 00105265A EP 1041029 B1 EP1041029 B1 EP 1041029B1
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EP
European Patent Office
Prior art keywords
air
sheets
stack
stacks
arrangement 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.)
Expired - Lifetime
Application number
EP00105265A
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German (de)
French (fr)
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EP1041029A3 (en
EP1041029A2 (en
Inventor
Bernd Ramcke
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ECH Will GmbH and Co
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ECH Will GmbH and Co
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Publication date
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Publication of EP1041029A3 publication Critical patent/EP1041029A3/en
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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
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of the pile
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4217—Forming multiple piles
    • B65H2301/42172—Forming multiple piles simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/352—Other elements with suction surface, e.g. plate or wall facing the edge of the handled 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
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/21—Dynamic air effects
    • B65H2601/211—Entrapping air in or under the 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard

Definitions

  • the invention relates to a method for removing entrapped air when forming stacks of sheets, which are successively fed to a stack to be formed and deposited on it, wherein in the feed region of the arc air is sucked out of gaps of the sheet.
  • the invention also relates to an arrangement for the removal of trapped air in forming stacks of sheets with a feed device for feeding the sheets successively to the stack to be formed, on which they are deposited, wherein in the region of the supply means at least one suction device for removing air from gaps is provided between sheet.
  • Arches should be understood to mean sheets of paper, cardboard or plastic, such as foils. The size of the bow can vary within wide limits. So can be z. B.
  • these sheets are often accumulated in stacks (also called giant) and then fed to a further processing in which they z. B. are enveloped with wrapping material.
  • stacks also called giant
  • the transportation of uncoated stacks requires particular care because, as a result of the air trapped between the sheets forming the stacks, there is a tendency for individual sheets or entire sheet layers to move, causing a stack to lose its desired generally cuboidal configuration. This can lead to damage during further transport, which can make the entire stack useless.
  • To remove such air inclusions z. B. DE 195 23 699 A 1 or DE 34 03 209 A 1 method known according to which the air pockets are pressed out of the finished stack or struck.
  • the effect of the extraction of interfering air can be further improved in a further embodiment of the invention in that air is sucked above the feed area, because then disturbing of the sheet with supplied air is gently removed.
  • air can be sucked through openings of boundary walls into cavities of suction devices, so-called vacuum chambers.
  • a particularly advantageous embodiment of an extraction of air from the side surfaces of two juxtaposed stack can be achieved in that boundary walls of the cavity (vacuum chamber) arranged between two stacks suction approach each other and touch in places and are connected to each other. If it is ensured that air can flow through further openings with larger cross-sections in the areas of the contacting boundary walls, then adjusting undesirable differences in air pressure on both sides of the hollow body can be compensated.
  • the homogenization of the suction can also be used if the flow of air in the cavity is at least partially throttled or interrupted.
  • a suction device may comprise an air-aligned alignment surface for the sheets of a stacking surface.
  • Such an alignment surface may preferably be connected to an oscillating drive that vibrates the surface.
  • an alignment surface may be formed as a boundary wall of a cavity connected to a vacuum source.
  • boundary walls can then preferably be provided in the contact areas with further openings whose cross sections are larger than those of the air openings.
  • the cavity may be provided in some embodiments of the invention in places with throttle elements for the air.
  • the air conditions in the supply region of the sheet in the sense of reducing the air inclusions can be improved in that a suction device is arranged above the sheet supply area, so that even over the stack with the bow conveyed air can be sucked.
  • the advantage associated with the invention is that the formation of air pockets already largely suppressed during stacking, so that later pressing of the stack, which always requires a considerable effort, unnecessary.
  • the boundary surfaces of the suction devices, if they are vibrated, in addition as alignment surfaces for the stack serve.
  • Figures 1 and 2 show schematically a pallet 1, the two stacks 2 and 3 from Bow 4 is wearing.
  • the sheets can be sheets of normal copy paper size or a smaller or larger format.
  • the bows can also made of cardboard or plastic.
  • the sheet 4 with represented large spaces 13 that they do not have in reality. Much more The bows in the stacks are close together. They are supplied by supply facilities 6 in the form of conveyor belts 7 (only one can be seen in FIG. 1) in FIG Direction of the arrow 8 consecutively fed laterally and on the stacks. 2 and 3 filed.
  • the conveyor belts 7 are delivery belts of a not shown Machine for producing the sheet, z. B.
  • the pallet 1 is not shown by a usual Lowered lifting device, so that the stacking surfaces at least approximately maintain the same heights relative to the conveyor belts 7.
  • Below the conveyor belts 7 is an alignment plate 9, by an oscillating drive 11 in oscillating movements to align the sheets 4 in the stacks 2 and 3 in the Area 12 of the sheet feed is offset.
  • suction devices for removal d. H. Suction of harmful air inclusions arranged from the spaces 13 between the sheets 4. Hereinafter is spoken of the sucked air inclusions only as air ".
  • a first suction device 14 is located opposite the supply device 6 and has a vacuum box 17 associated with the surfaces 15 of the stacks 2 and 3 and provided with air openings 16, which is connected to a vacuum source 18 in the form of a fan 19.
  • the sucked from the spaces 13 air (air pockets) passes according to the arrows 21 through the air openings 16 in the vacuum box 17 and from there according to arrows 20 to the fan 19th 2, further suction devices 22, 23 and 24 which are assigned to those surfaces 25 or 26 or 27 or 28 of the stacks 2 and 3, which are parallel to the feed direction of the sheets 4, are located in the feed region 12 (as indicated by arrow 8).
  • suction devices also have vacuum box 29, 31 and 32, which are provided with not shown in Figure 2 air openings and connected via lines corresponding to the arrows 20 with the fan 19, so that the extracted air according to the arrows 21 in the vacuum box and from there according to the arrows 20 can flow to the fan 19.
  • the vacuum boxes 29, 31 and 32 are caused by oscillating actuators 33 and 34 and 36 respectively for performing vibrations, so that their suction surfaces 37 and 38 a, 38 b and 39 except for sucking the air inclusions and for aligning the stack side surfaces 25th or 26 or 27 or 28 can serve.
  • the formation of the suction devices 22 and 24 acting on the outer side surfaces 25 and 28 of the stacks 2 and 3, respectively, may be substantially the same.
  • the vacuum box 31 of the suction device 23 is shown in the in a first suction 40 through air openings 41, 42 in the suction surfaces 38 a, 38 b formed boundary walls 43 and 44, air from the interstices 13 of the stack second and 3 flows in accordance with the arrows 46.
  • a further suction 47 above the stack 2 and 3 are more air openings 41 a and 42 a, is sucked from the entrained by the arc air, which also reduces the risk of the formation of trapped air.
  • the boundary walls 43, 44 which simultaneously serve as alignment surfaces for the side surfaces 26, 27 of the stacks 2 and 3, are partially retracted and siege.
  • the boundary walls 43, 44 which serve simultaneously as alignment surfaces for the side surfaces 26, 27 of the stacks 2 and 3 respectively, are locally drawn in and approach each other until they touch each other in the areas 48, 49. In these areas, the boundary walls can be connected to each other. In the contact areas there are air openings 52 with cross-sections that are significantly larger than those of the air openings 41, 42. They allow pressure equalization, as a result of different conditions when shaking the boundary walls and suction of air undesirably different pressures on both sides of the suction device 23 form.
  • a barrier 53 also serves to improve the air flow in the suction device 23rd
  • the used with suction openings boundary walls the suction devices may advantageously in addition to the alignment the stacking surfaces can be used if it puts shaking motion become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Materials For Photolithography (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Abstract

The method for removing trapped air from sheets being formed into a stack comprises sucking the air from the space (13) betw the sheets (4) in the area (12) where they are fed on to it. This may be carried out using an air extractor (23) situated betwee two adjoining stacks of paper. An Independent claim is included for a system for removing air from sheets being formed into a stack.

Description

Die Erfindung betrifft ein Verfahren zum Entfernen von Lufteinschlüssen beim Bilden von Stapeln aus Bogen, die einem zu bildenden Stapel aufeinanderfolgend zugeführt und auf ihm abgelegt werden, wobei im Zufuhrbereich der Bogen Luft aus Zwischenräumen der Bogen abgesaugt wird.
Die Erfindung betrifft außerdem eine Anordnung zum Entfernen von Lufteinschlüssen beim Bilden von Stapeln aus Bogen mit einer Zufuhreinrichtung zum aufeinanderfolgenden Zuführen der Bogen zu dem zu bildenden Stapel, auf dem sie abgelegt werden, wobei im Bereich der Zufuhreinrichtung mindestens eine Absaugvorrichtung zum Entfernen von Luft aus Zwischenräumen zwischen Bogen vorgesehen ist.
Unter Bogen sollen Bogen aus Papier, Karton oder Kunststoff wie Folien verstanden werden. Die Größe der Bogen kann in weiten Grenzen variieren. So lassen sich z. B. Stapel aus Bogen von der Größe üblichen Kopierpapiers oder auch von geringerer oder mehrfacher Größe gemäß der Erfindung behandeln.
Bei der Herstellung von Bogen werden diese oft zu Stapeln (auch Riese genannt) angesammelt und danach einer Weiterverarbeitung zugeführt, bei der sie z. B. mit Umhüllungsmaterial umhüllt werden. Der Transport unumhüllter Stapel erfordert besondere Vorsicht, weil infolge der beim Bilden der Stapel zwischen den Bogen eingeschlossenen Luft leicht ein Verschieben einzelner Bogen oder ganzer Bogenlagen eintritt, bei dem ein Stapel seine gewünschte meist quaderförmige Konfiguration verliert. Dies kann beim weiteren Transport zu Beschädigungen führen, die den gesamten Stapel unbrauchbar machen können.
Zum Entfernen derartiger Lufteinschlüsse sind z. B. durch die DE 195 23 699 A 1 oder die DE 34 03 209 A 1 Verfahren bekannt, nach denen die Lufteinschlüsse aus dem fertigen Stapel herausgepreßt bzw. herausgestrichen werden. Derartig arbeitende Verfahren sind nicht optimal.
In der US-A-5259608 und der GB 914468A sind Verfahren und Anordnungen beschrieben, bei denen die Ablage von Druckbögen unter dem Einfluss von Saugluft erfolgt.
Die der Erfindung zugrundeliegende Aufgabe besteht darin, ein neues und vorteilhaftes Verfahren sowie eine entsprechende Anordnung zu schaffen zwecks Herstellung von Stapeln ohne störende Lufteinschlüsse.
Nach dem Verfahren gemäß der Erfindung wird diese Aufgabe dadurch gelöst, dass die Bogen zwei nebeneinander angeordneten Stapeln zugeführt werden und dass die Luft auf jeweils einer Seitenfläche eines Stapels von einer zwischen den Stapeln angeordneten Absaugvorrichtung abgesaugt wird. Eine besonders vorteilhafte Ausgestaltung des Verfahrens besteht gemäß der Erfindung darin, daß Absaugvorrichtungen zum Absaugen der Luft schwingende Ausrichtbewegungen für Flächen des Stapels ausführen. Die Wirkung der Absaugung störender Luft kann in weiterer Ausgestaltung der Erfindung noch dadurch verbessert werden, dass Luft oberhalb des Zufuhrbereichs abgesaugt wird, weil dann störende von den Bogen mit zugeführte Luft schonend entfernt wird. Hierbei kann Luft durch Öffnungen von Begrenzungswänden in Hohlräume von Absaugvorrichtungen, sogenannte Unterdruckkammern, gesaugt werden.
Eine besonders vorteilhafte Weiterbildung einer Absaugung von Luft von den Seitenflächen zweier nebeneinander angeordneter Stapel läßt sich dadurch erreichen, dass Begrenzungswände des Hohlraums (Unterdruckkammer) einer zwischen zwei Stapeln angeordneten Absaugvorrichtung sich einander annähern und stellenweise berühren und dort miteinander verbunden sind. Wird dafür gesorgt, daß in den Bereichen der sich berührenden Begrenzungswände Luft durch weitere Öffnungen mit größeren Querschnitten strömen kann, so können sich etwa einstellende unerwünschte Luftdruckunterschiede auf beiden Seiten des Hohlkörpers ausgleichen. Der Homogenisierung der Absaugung kann es auch dienen, wenn die Strömung der Luft in dem Hohlraum zumindest teilweise gedrosselt oder unterbrochen wird.The invention relates to a method for removing entrapped air when forming stacks of sheets, which are successively fed to a stack to be formed and deposited on it, wherein in the feed region of the arc air is sucked out of gaps of the sheet.
The invention also relates to an arrangement for the removal of trapped air in forming stacks of sheets with a feed device for feeding the sheets successively to the stack to be formed, on which they are deposited, wherein in the region of the supply means at least one suction device for removing air from gaps is provided between sheet.
Arches should be understood to mean sheets of paper, cardboard or plastic, such as foils. The size of the bow can vary within wide limits. So can be z. B. stack of sheets on the size of conventional copy paper or even of lesser or more size according to the invention treat.
In the production of these sheets are often accumulated in stacks (also called giant) and then fed to a further processing in which they z. B. are enveloped with wrapping material. The transportation of uncoated stacks requires particular care because, as a result of the air trapped between the sheets forming the stacks, there is a tendency for individual sheets or entire sheet layers to move, causing a stack to lose its desired generally cuboidal configuration. This can lead to damage during further transport, which can make the entire stack useless.
To remove such air inclusions z. B. DE 195 23 699 A 1 or DE 34 03 209 A 1 method known according to which the air pockets are pressed out of the finished stack or struck. Such processes are not optimal.
In US-A-5259608 and GB 914468A methods and arrangements are described in which the deposition of signatures takes place under the influence of suction air.
The object underlying the invention is to provide a new and advantageous method and a corresponding arrangement for the purpose of producing stacks without disturbing air inclusions.
According to the method according to the invention, this object is achieved in that the sheets are fed to two juxtaposed stacks and that the air is sucked off on a respective side surface of a stack from a suction device arranged between the stacks. A particularly advantageous embodiment of the method according to the invention is that exhaust devices for sucking the air perform oscillating alignment movements for surfaces of the stack. The effect of the extraction of interfering air can be further improved in a further embodiment of the invention in that air is sucked above the feed area, because then disturbing of the sheet with supplied air is gently removed. In this case, air can be sucked through openings of boundary walls into cavities of suction devices, so-called vacuum chambers.
A particularly advantageous embodiment of an extraction of air from the side surfaces of two juxtaposed stack can be achieved in that boundary walls of the cavity (vacuum chamber) arranged between two stacks suction approach each other and touch in places and are connected to each other. If it is ensured that air can flow through further openings with larger cross-sections in the areas of the contacting boundary walls, then adjusting undesirable differences in air pressure on both sides of the hollow body can be compensated. The homogenization of the suction can also be used if the flow of air in the cavity is at least partially throttled or interrupted.

Die eingangs genannte Anordnung ist dadurch gekennzeichnet, dass zwischen zwei Stapeln, denen Bogen zugeführt sind, ein Hohlraum einer Absaugvorrichtung angeordnet ist, deren mit Luftöffnungen versehene Begrenzungswände an jeweils eine Seitenfläche eines Stapels angrenzen.
Eine Absaugvorrichtung kann eine mit Luftöffnungen versehene Ausrichtfläche für die Bogen einer Stapelfläche aufweisen. Eine derartige Ausrichtfläche kann bevorzugt mit einem die Fläche in Schwingungen versetzenden Schwingantrieb verbunden sein. Gemäß einer bevorzugten Weiterbildung der Erfindung kann eine Ausrichtfläche als Begrenzungswand eines mit einer Unterdruckquelle verbundenen Hohlraums ausgebildet sein. Die vorbeschriebene Absaugvorrichtung ist besonders platzsparend und wenig aufwendig. Die Begrenzungswände einer solchen Absaugvorrichtung können sich stellenweise berühren und dort miteinander verbunden sein. Diese Begrenzungswände können dann vorzugsweise in den Berührungsbereichen mit weiteren Öffnungen versehen sein, deren Querschnitte größer sind als diejenigen der Luftöffnungen. Der Hohlraum kann in weiterer Ausbildung der Erfindung stellenweise mit Drosselelementen für die Luft versehen sein.
Gemäß einer weiteren Ausgestaltung der Erfindung können die Luftverhältnisse im Zufuhrbereich der Bogen im Sinne einer Verringerung der Lufteinschlüsse dadurch verbessert werden, daß eine Absaugvorrichtung auch oberhalb des Bogenzufuhrbereichs angeordnet ist, so daß auch über dem Stapel mit den Bogen angeförderte Luft abgesaugt werden kann.The above-mentioned arrangement is characterized in that between two stacks, which are supplied with sheets, a cavity of a suction device is arranged, whose provided with air openings boundary walls adjacent to each side surface of a stack.
A suction device may comprise an air-aligned alignment surface for the sheets of a stacking surface. Such an alignment surface may preferably be connected to an oscillating drive that vibrates the surface. According to a preferred development of the invention, an alignment surface may be formed as a boundary wall of a cavity connected to a vacuum source. The above-described suction device is particularly space-saving and inexpensive. The boundary walls of such a suction device can touch in places and be connected there. These boundary walls can then preferably be provided in the contact areas with further openings whose cross sections are larger than those of the air openings. The cavity may be provided in some embodiments of the invention in places with throttle elements for the air.
According to a further embodiment of the invention, the air conditions in the supply region of the sheet in the sense of reducing the air inclusions can be improved in that a suction device is arranged above the sheet supply area, so that even over the stack with the bow conveyed air can be sucked.

Der mit der Erfindung verbundene Vorteil besteht darin, daß die Bildung von Lufteinschlüssen schon während des Stapelaufbaus weitgehend unterbunden wird, so daß sich späteres Pressen des Stapels, das stets einen beachtlichen Aufwand erfordert, erübrigt. Die Begrenzungsflächen der Absaugvorrichtungen können, falls sie in Schwingungen versetzt werden, zusätzlich als Ausrichtflächen für die Stapel dienen. The advantage associated with the invention is that the formation of air pockets already largely suppressed during stacking, so that later pressing of the stack, which always requires a considerable effort, unnecessary. The boundary surfaces of the suction devices, if they are vibrated, in addition as alignment surfaces for the stack serve.

Die Erfindung wird anhand eines Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment.

Es zeigen

Figur 1
eine Seitenansicht einer Abgabestation für Bogen, die zwei Stapeln zugeführt sind,
Figur 2
eine Ansicht gemäß Pfeil A in Figur 1
Figur 3
Einzelheiten einer zwischen den Stapeln angeordneten Absaugvorrichtung in vergrößertem Maßstab,
Figur 4
einen Schnitt (unmaßstäblich) durch die Absaugvorrichtung nach Figur 3 entsprechend der Linie C-C
Show it
FIG. 1
a side view of a delivery station for sheets which are fed to two stacks,
FIG. 2
a view according to arrow A in Figure 1
FIG. 3
Details of an arranged between the stacks suction on an enlarged scale,
FIG. 4
a section (not to scale) through the suction device of Figure 3 along the line CC

Die Figuren 1 und 2 zeigen schematisch eine Palette 1, die zwei Stapel 2 und 3 aus Bogen 4 trägt. Bei den Bogen kann es sich um Bogen von normalem Kopierpapierformat oder einem kleineren oder größeren Format handeln. Die Bogen können auch aus Karton oder Kunststoff bestehen. In der Zeichnung sind die Bogen 4 mit großen Zwischenräumen 13 dargestellt, die sie in der Realität nicht haben. Vielmehr liegen die Bogen in den Stapeln dicht an dicht aufeinander. Sie werden von Zufuhreinrichtungen 6 in Form von Förderbändern 7 (in Figur 1 ist nur eines zu sehen) in Richtung des Pfeils 8 aufeinanderfolgend seitlich zugeführt und auf den Stapeln 2 und 3 abgelegt. Die Förderbänder 7 sind Abgabebänder einer nicht dargestellten Maschine zum Herstellen der Bogen, z. B. eines sogenannten Kleinformatschneiders etwa vom bekannten Typ SLK der Anmelderin oder einer größere Formate herstellenden Schneidemaschine, etwa vom Typ FFS der Anmelderin, die sogenannte Foliobogen herstellt. Die Palette 1 wird von einer üblichen nicht dargestellten Hubvorrichtung abgesenkt, so daß die Stapeloberflächen zumindest annähernd die gleichen Höhen relativ zu den Förderbändern 7 beibehalten. Unterhalb der Förderbänder 7 befindet sich eine Ausrichtplatte 9, die von einem Schwingantrieb 11 in schwingende Bewegungen zum Ausrichten der Bogen 4 in den Stapeln 2 und 3 im Bereich 12 der Bogenzufuhr versetzt wird. In dem Bereich 12 der Zufuhreinrichtung 6 sind Absaugvorrichtungen zum Entfernen, d. h. Absaugen schädlicher Lufteinschlüsse aus den Zwischenräumen 13 zwischen den Bogen 4 angeordnet. Im Folgenden wird von den abgesaugten Lufteinschlüssen nur als Luft" gesprochen.Figures 1 and 2 show schematically a pallet 1, the two stacks 2 and 3 from Bow 4 is wearing. The sheets can be sheets of normal copy paper size or a smaller or larger format. The bows can also made of cardboard or plastic. In the drawing, the sheet 4 with represented large spaces 13 that they do not have in reality. Much more The bows in the stacks are close together. They are supplied by supply facilities 6 in the form of conveyor belts 7 (only one can be seen in FIG. 1) in FIG Direction of the arrow 8 consecutively fed laterally and on the stacks. 2 and 3 filed. The conveyor belts 7 are delivery belts of a not shown Machine for producing the sheet, z. B. a so-called small format cutter for example of the known type SLK the applicant or a larger formats producing cutting machine, such as the type FFS of the Applicant, the so-called Produces folio sheets. The pallet 1 is not shown by a usual Lowered lifting device, so that the stacking surfaces at least approximately maintain the same heights relative to the conveyor belts 7. Below the conveyor belts 7 is an alignment plate 9, by an oscillating drive 11 in oscillating movements to align the sheets 4 in the stacks 2 and 3 in the Area 12 of the sheet feed is offset. In the area 12 of the feeder 6 are suction devices for removal, d. H. Suction of harmful air inclusions arranged from the spaces 13 between the sheets 4. Hereinafter is spoken of the sucked air inclusions only as air ".

Eine erste Absaugvorrichtung 14 befindet sich gegenüber der Zufuhreinrichtung 6 und weist einen den Flächen 15 der Stapel 2 und 3 zugeordneten mit Luftöffnungen 16 versehenen Unterdruckkasten 17 auf, der mit einer Unterdruckquelle 18 etwa in Form eines Ventilators 19 verbunden ist. Die aus den Zwischenräumen 13 gesaugte Luft (Lufteinschlüsse) gelangt entsprechend den Pfeilen 21 durch die Luftöffnungen 16 in den Unterdruckkasten 17 und von da entsprechend Pfeilen 20 zu dem Ventilator 19.
Im Zufuhrbereich 12 befinden sich, wie insbesondere Figur 2 zeigt, weitere Absaugvorrichtungen 22, 23 und 24, die denjenigen Flächen 25 bzw. 26 bzw. 27 bzw. 28 der Stapel 2 und 3 zugeordnet sind, die sich parallel zu der Zufuhrrichtung der Bogen 4 (entsprechend Pfeil 8) erstrecken. Diese Absaugvorrichtungen weisen ebenfalls Unterdruckkasten 29, 31 und 32 auf, die mit in Figur 2 nicht dargestellten Luftöffnungen versehen und über Leitungen entsprechend den Pfeilen 20 mit dem Ventilator 19 verbunden sind, so daß die abgesaugte Luft entsprechend den Pfeilen 21 in die Unterdruckkasten und von da entsprechend den Pfeilen 20 zu dem Ventilator 19 strömen kann. Die Unterdruckkasten 29, 31 und 32 werden von Schwingantrieben 33 bzw. 34 bzw. 36 jeweils zur Ausführung von Schwingungen veranlaßt, so daß ihre Saugflächen 37 bzw. 38 a, 38 b bzw. 39 außer zum Absaugen der Lufteinschlüsse auch zum Ausrichten der Stapelseitenflächen 25 bzw. 26 bzw. 27 bzw. 28 dienen können. Die Ausbildung der die äußeren Seitenflächen 25 und 28 der Stapel 2 bzw. 3 beaufschlagenden Absaugvorrichtungen 22 und 24 kann im wesentlichen gleich sein. Die zwischen den Stapeln 2 und 3 angeordnete Absaugvorrichtung 23 ist im folgenden näher beschrieben.
In den Figuren 3 und 4 ist der Unterdruckkasten 31 der Absaugvorrichtung 23 dargestellt, in den in einem ersten Absaugbereich 40 durch Luftöffnungen 41, 42 in den als Saugflächen 38 a, 38 b ausgebildeten Begrenzungswänden 43 bzw. 44 Luft aus den Zwischenräumen 13 der Stapel 2 und 3 entsprechend den Pfeilen 46 einströmt. In einem weiteren Absaugbereich 47 oberhalb der Stapel 2 und 3 befinden sich weitere Luftöffnungen 41 a und 42 a, von den durch die Bogen mitgerissene Luft abgesaugt wird, was die Gefahr der Bildung von Lufteinschlüssen ebenfalls verringert. Die Begrenzungswände 43, 44, die gleichzeitig als Ausrichtflächen für die Seitenflächen 26, 27 der Stapel 2 bzw. 3 dienen, sind stellenweise eingezogen und gert. Die Begrenzungswände 43, 44, die gleichzeitig als Ausrichtflächen für die Seitenflächen 26, 27 der Stapel 2 bzw. 3 dienen, sind stellenweise eingezogen und nähern sich einander an, bis sie sich in den Bereichen 48, 49, berühren. In diesen Bereichen können die Begrenzungswände miteinander verbunden sein. In den Berührungsbereichen befinden sich Luftöffnungen 52 mit Querschnitten, die erheblich größer sind als diejenigen der Luftöffnungen 41, 42. Sie erlauben einen Druckausgleich, wenn sich infolge unterschiedlicher Verhältnisse beim Rütteln der Begrenzungswände und Absaugen von Luft in unerwünschte Weise unterschiedliche Drücke auf beiden Seiten der Absaugvorrichtung 23 bilden. Eine Sperre 53 dient ebenfalls zur Verbesserung der Luftführung in der Absaugvorrichtung 23.A first suction device 14 is located opposite the supply device 6 and has a vacuum box 17 associated with the surfaces 15 of the stacks 2 and 3 and provided with air openings 16, which is connected to a vacuum source 18 in the form of a fan 19. The sucked from the spaces 13 air (air pockets) passes according to the arrows 21 through the air openings 16 in the vacuum box 17 and from there according to arrows 20 to the fan 19th
2, further suction devices 22, 23 and 24 which are assigned to those surfaces 25 or 26 or 27 or 28 of the stacks 2 and 3, which are parallel to the feed direction of the sheets 4, are located in the feed region 12 (as indicated by arrow 8). These suction devices also have vacuum box 29, 31 and 32, which are provided with not shown in Figure 2 air openings and connected via lines corresponding to the arrows 20 with the fan 19, so that the extracted air according to the arrows 21 in the vacuum box and from there according to the arrows 20 can flow to the fan 19. The vacuum boxes 29, 31 and 32 are caused by oscillating actuators 33 and 34 and 36 respectively for performing vibrations, so that their suction surfaces 37 and 38 a, 38 b and 39 except for sucking the air inclusions and for aligning the stack side surfaces 25th or 26 or 27 or 28 can serve. The formation of the suction devices 22 and 24 acting on the outer side surfaces 25 and 28 of the stacks 2 and 3, respectively, may be substantially the same. The arranged between the stacks 2 and 3 suction device 23 is described in more detail below.
In Figures 3 and 4, the vacuum box 31 of the suction device 23 is shown in the in a first suction 40 through air openings 41, 42 in the suction surfaces 38 a, 38 b formed boundary walls 43 and 44, air from the interstices 13 of the stack second and 3 flows in accordance with the arrows 46. In a further suction 47 above the stack 2 and 3 are more air openings 41 a and 42 a, is sucked from the entrained by the arc air, which also reduces the risk of the formation of trapped air. The boundary walls 43, 44, which simultaneously serve as alignment surfaces for the side surfaces 26, 27 of the stacks 2 and 3, are partially retracted and siege. The boundary walls 43, 44, which serve simultaneously as alignment surfaces for the side surfaces 26, 27 of the stacks 2 and 3 respectively, are locally drawn in and approach each other until they touch each other in the areas 48, 49. In these areas, the boundary walls can be connected to each other. In the contact areas there are air openings 52 with cross-sections that are significantly larger than those of the air openings 41, 42. They allow pressure equalization, as a result of different conditions when shaking the boundary walls and suction of air undesirably different pressures on both sides of the suction device 23 form. A barrier 53 also serves to improve the air flow in the suction device 23rd

Mit dem beschriebenen Verfahren und der Anordnung gelingt es, die Bildung von Lufteinschlüssen schon im Ansatz, nämlich bei der Stapelbildung, ausreichend zu verringern. Die dazu verwendeten mit Saugöffnungen versehenen Begrenzungswände der Absaugvorrichtungen können in vorteilhafterweise zusätzlich zum Ausrichten der Stapelflächen genutzt werden, falls sie rüttelnde Bewegung versetzt werden.With the described method and the arrangement, it is possible, the formation of Air pockets already in the beginning, namely in the stack formation, sufficient to reduce. The used with suction openings boundary walls the suction devices may advantageously in addition to the alignment the stacking surfaces can be used if it puts shaking motion become.

Claims (16)

  1. Method of removing air inclusions when forming stacks (2, 3) from sheets (4) which are fed successively to a stack which is to be formed and are deposited on said stack, wherein air is sucked off, in the infeed region of the sheets, from intervening spaces between said sheets, characterised in that the sheets are fed to two stacks disposed side by side and that air is sucked off, on one lateral face (26, 27) of a stack in each case, by a suction device (23) disposed between the stacks.
  2. Method according to claim 1, characterised in that suction devices for sucking off the air execute oscillating aligning movements for faces of the stack.
  3. Method according to claim 1 and/or claim 2, characterised in that air is sucked off above the infeed region.
  4. Method according to one or more of the preceding claims, characterised in that air is sucked through apertures (41, 42) in cavities (31) of suction devices (23).
  5. Method according to claim 4, characterised in that boundary walls (43, 44) of the cavity of a suction device (23) disposed between two stacks (2, 3) approach one another, touch one another at certain points and are connected to one another at said points, and that, in the regions of the boundary walls that touch one another, air flows through further apertures (52) with cross-sections which are larger, relative to the apertures (41, 42).
  6. Method according to claim 5, characterised in that the flowing of the air is at least partially throttled or interrupted in the cavity.
  7. Method according to one or more of the preceding claims, characterised in that air is sucked off from the stack faces that lie opposite the sheet infeed (6) and from both lateral faces of the stacks.
  8. Arrangement for removing air inclusions when forming stacks (2, 3) from sheets (4), with a feeding-in apparatus (6) for successively feeding the sheets in to form a stack which is to be formed and on which they are deposited, wherein there is provided, in the region (12) of the feeding-in apparatus (6), at least one suction device (14, 22 ... 24) for removing air from intervening spaces (13) between sheets (4), characterised in that there is disposed, between two stacks to which sheets are fed, a cavity (31) of a suction device (23) whose boundary walls (43, 44), which are provided with air apertures (41, 42), adjoin a lateral face (26, 27) of a stack in each case.
  9. Arrangement according to claim 8, characterised in that the boundary walls (43, 44) touch one another at certain points and are connected to one another at said points.
  10. Arrangement according to claim 9, characterised in that the boundary walls (43, 44) are preferably provided, in the contact regions (48 ... 51), with further apertures (52) whose cross-sections are larger than those of the air apertures (41, 42).
  11. Arrangement according to one or more of claims 8 to 10, characterised in that the cavity (31) is provided, at certain points, with throttling elements (53) for the air.
  12. Arrangement according to one or more of claims 8 to 11, characterised in that suction devices (14, 22, 23, 24) are associated with that face (15) of the stack which lies opposite the sheet infeed (6), and also with both the lateral faces of said stack.
  13. Arrangement according to one or more of claims 8 to 12, characterised in that at least one suction device has aligning faces (37 ... 39), which are provided with air apertures (41, 42), for the sheets (4) of a stack face.
  14. Arrangement according to claim 13, characterised in that the aligning faces are connected to an oscillating drive (33 ... 36) which generates oscillations.
  15. Arrangement according to claim 13 and/or claim 14, characterised in that at least one aligning face is constructed as the boundary wall of a cavity (29 ... 32) which is connected to a vacuum source (19).
  16. Arrangement according to one or more of claims 8 to 15, characterised in that at least one further suction device (41 a, 42 a) is provided above (47) the region (12) of the feeding-in apparatus (6).
EP00105265A 1999-03-27 2000-03-14 Method and device for removing air inclusions during the formation of stacks of sheets Expired - Lifetime EP1041029B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914068A DE19914068A1 (en) 1999-03-27 1999-03-27 Method and arrangement for removing air pockets when forming stacks from sheets
DE19914068 1999-03-27

Publications (3)

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EP1041029A2 EP1041029A2 (en) 2000-10-04
EP1041029A3 EP1041029A3 (en) 2001-10-31
EP1041029B1 true EP1041029B1 (en) 2005-01-19

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EP00105265A Expired - Lifetime EP1041029B1 (en) 1999-03-27 2000-03-14 Method and device for removing air inclusions during the formation of stacks of sheets

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US (1) US6364312B1 (en)
EP (1) EP1041029B1 (en)
JP (1) JP2000296963A (en)
CN (1) CN1177744C (en)
AT (1) ATE287372T1 (en)
BR (1) BR0001428A (en)
CA (1) CA2302002C (en)
DE (2) DE19914068A1 (en)
ES (1) ES2233234T3 (en)
PT (1) PT1041029E (en)

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DE50203751D1 (en) * 2002-05-02 2005-09-01 Siempelkamp Handling Sys Gmbh Device for depositing thin plates with minimized slippage between the plates
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ES2689873T3 (en) * 2008-09-17 2018-11-16 Bw Papersystems Stuttgart Gmbh Collection and transport device for piles formed by layers of sheets
DE102009040918A1 (en) * 2009-09-11 2011-03-17 Focke & Co.(Gmbh & Co. Kg) Apparatus and method for handling stacks of print media
CN102350805B (en) * 2011-09-23 2012-10-31 张家港先锋自动化机械设备有限公司 Thin film pressing device
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CN112454607B (en) * 2020-12-04 2022-04-12 河南海格尔高温材料有限公司 Negative pressure type exhaust device for processing prefabricated block

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Also Published As

Publication number Publication date
ES2233234T3 (en) 2005-06-16
DE19914068A1 (en) 2000-09-28
DE50009252D1 (en) 2005-02-24
EP1041029A3 (en) 2001-10-31
JP2000296963A (en) 2000-10-24
ATE287372T1 (en) 2005-02-15
US6364312B1 (en) 2002-04-02
BR0001428A (en) 2000-10-17
CN1177744C (en) 2004-12-01
CA2302002C (en) 2007-09-04
CA2302002A1 (en) 2000-09-27
CN1269319A (en) 2000-10-11
EP1041029A2 (en) 2000-10-04
PT1041029E (en) 2005-05-31

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