EP2602218B1 - Eccentric suction wheel - Google Patents

Eccentric suction wheel Download PDF

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Publication number
EP2602218B1
EP2602218B1 EP12191559.9A EP12191559A EP2602218B1 EP 2602218 B1 EP2602218 B1 EP 2602218B1 EP 12191559 A EP12191559 A EP 12191559A EP 2602218 B1 EP2602218 B1 EP 2602218B1
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EP
European Patent Office
Prior art keywords
suction
sheet
suction wheel
area
stack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12191559.9A
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German (de)
French (fr)
Other versions
EP2602218A2 (en
EP2602218A3 (en
Inventor
Martin Haupt-Terlau
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
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Publication of EP2602218A2 publication Critical patent/EP2602218A2/en
Publication of EP2602218A3 publication Critical patent/EP2602218A3/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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/10—Suction rollers
    • 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
    • B65H2406/33—Rotary suction means, e.g. roller, cylinder or drum
    • 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
    • B65H2406/33—Rotary suction means, e.g. roller, cylinder or drum
    • B65H2406/332—Details on suction openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a suction wheel with the preamble features of claim 1 and a sheet feeder with such a suction wheel with the features of claim 9.
  • the distance between the suction wheel and the upper edge of a stack of sheets from which the suction wheel is to remove the uppermost sheet in each case is constant.
  • the distance between the suction wheel and the stack top edge may only be adjusted within a narrow range, usually between four and six millimeters. Due to the constant distance it may be too Intake disturbances occur: if no separating air cushion is formed between the uppermost sheet and the underlying sheet, two sheets can pass through the suction wheel in through-sucking papers, so that a so-called double sheet is transferred to a subsequent sheet-processing machine.
  • Another AnsaugQuery is due to the fact that due to a large distance between Saugrad and stack top edge of the time is not exactly predetermined, to which the uppermost arc is taken by the Saugrad. In the case of too small a distance of the suction wheel from the top of the stack, however, a separating air cushion can only be generated between the top sheet and the underlying sheet to a limited extent, since due to the small distance separating air can hardly be blown flat under the sheet to be separated.
  • the document DE 101 14 064 A1 discloses a suction wheel according to the preamble of claim 1.
  • the object of the invention is therefore to provide a suction wheel, which allows a secure and defined gripping a respective top sheet of a stack.
  • the suction wheel according to the invention has a Saugradratio rotatable about an axis of rotation, wherein the Saugradoasa is provided on its lateral surface with a plurality of suction openings for sucking and transporting sheets.
  • the suction wheel is used in particular for separating a respective uppermost sheet from a stack of sheets.
  • the Saugradanalysis is executed out of round. That is, the radius of the Saugrad analysess is not constant in the region of the entire Saugradtechnologies. In other words, the distance between the axis of rotation of the Saugrad stressess and the peripheral or lateral surface of the Saugrad emotionss varies.
  • a suction wheel is also understood to mean a suction wheel with a belt that circulates around a device for removing sheets from a stack, as shown in FIG DE 196 32 657 C1 and the DE 196 48 742 A1 is described.
  • a respective segment a suction area for sucking a sheet, a holding area for holding and conveying a sheet and a release area to share an arc.
  • the radius of the absorbent body in the suction region is greater than the radius of the absorbent body in the holding region. Due to the larger radius of the absorbent body in the suction ensures that during the suction of a sheet, the distance between the suction holes of the absorbent body and the suctioned sheet is particularly low. This ensures, on the one hand, that the sheet is reliably sucked in, and, on the other hand, that the time is more precisely predetermined, at which a respective uppermost sheet is detected by the suction wheel.
  • the reduction of the radius of the absorbent body in the holding area allows the uppermost raised sheet to be further raised relative to the underlying sheet, and an air cushion to be created between the uppermost sheet and the underlying sheet by introducing a separating air.
  • the suction effect of the suction wheel in the release area is lower than in the intake area and in the holding area.
  • the Saugrad redesign can have fewer suction openings per unit area, especially in the release area as in the intake and in the holding area.
  • the Saugrad redesign in the release area has no suction or the suction openings are, at least partially, taped or closed. Due to the reduced suction, a respective sheet is no longer held as strong as before and can be easily released and passed, for example, to a subsequent transport unit.
  • the surface condition of the lateral surface of the suction wheel body is different in the intake region and / or in the holding region and / or in the release region.
  • different friction coefficients also referred to as friction coefficients
  • the lateral surface in the holding region made of steel and the lateral surface in the release region may be formed of a chromium-plated material. It is also advantageous if the coefficient of static friction of the casing part surface in the release region is lower than the static friction coefficient of the casing part surface in the holding region.
  • the casing part surface of the Saugradelless is designed in the suction as a flat surface. This is achieved in an advantageous manner that the entire suction at the moment of suction has approximately a constant distance from the top sheet of a stack and the sheet can be sucked safely and defined.
  • the object of the invention is also to provide a sheet feeder for a sheet-processing machine, which safely separated and as desired spaced sheet feeds the sheet-processing machine.
  • This object is achieved by a sheet feeder according to claim 9.
  • This sheet feeder for a sheet-processing machine is used for lifting and separating sheets from a stack with at least one suction wheel as described above.
  • the suction wheel is arranged above the stack and acts on a respective uppermost arc of the stack.
  • Fig. 1a shows a suction wheel 1 according to the invention in a first variant: the suction wheel 1 has a Saugradmaschine 20 and is divided into a first segment 21 and a second segment 22.
  • a respective segment 21, 22 has a suction region 24, a holding region 25 and a release region 26.
  • the suction region 24 serves to suck in sheets not shown here.
  • the holding portion 25 serves to hold the sucked sheet and transporting the sheet during the rotation of the Saugrads 1.
  • the Release area 26 is used to release sucked sheet in order to be able to pass this, for example, to a subsequent transport device.
  • the Saugradanalysis 20 of the Saugrads 1 is executed out of round. That is, the Saugradoasa 20 has no uniform radius.
  • the radius rA of the suction wheel body 20 in the intake region 24 is greater than the radius rH in the holding region 25.
  • the transition between the smaller radius rH and the larger radius rA is designed to be fluid.
  • the suction wheel 1 is acted upon by suction and rotated about the axis of rotation 29.
  • a suction wheel 1 is shown, the Saugradmaschine 20 was designed alternatively: the lateral surface 28 (not shown) of the Saugrad stressess 20 in the intake 24 was designed as a flat surface. A located below the Saugrads 1 sheet 1000 can be sucked particularly safe.
  • the lateral surface 28 of the Saugradelless is provided with suction openings 27 through which the suction air is effective.
  • the number of suction openings 27 per unit area may be different in the suction area 24, the holding area 25 and the release area 26.
  • the suction force In the holding region 25, the suction force has to be so great that a respective sheet 1000 sucked in the suction region 24 can be held and thus transported.
  • the suction force In the release area 26, the suction force should be lower so as to facilitate the release and transfer of each sheet 1000.
  • the number of suction ports 27 per unit area in contrast to the holding area 25 and the intake area 24 is reduced.
  • the suction openings 27 - as in Fig. 2b represented - are also closed or covered by gluing the shell part surface 28.1 of the release area 26 and thus brought out of action.
  • Fig. 4 shows a sheet feeder 10, in which a suction wheel according to the invention 1 is used for separating sheets 1000 from a sheet stack 100 and feeding the separated sheets 1000 via a feed table 11 to a sheet-processing machine 12, which is shown here as Taschenfalzstation a sheet folding machine.
  • a sheet-processing machine 12 which is shown here as Taschenfalzstation a sheet folding machine.
  • this Saugrad 1 is shown as a circle; however, it is to be understood that the suction wheel 1 has the advantageous embodiment as described above.
  • the sheet feeder 10 has a first, according to the invention carried out Saugrad 1 and a second Saugrad 2.
  • the first Saugrad 1 is disposed above the sheet stack 100, while the second Saugrad 2 below the sheet transport plane E and - seen in the sheet transport direction T - arranged downstream of the stack 100 is.
  • the axis of rotation of the first Saugrads 1 has a distance A to the stack trailing edge 100.1 of the sheet stack 100.
  • the second Saugrad 2 is arranged at a distance B in front of the stack leading edge 100.2 of the sheet stack 100.
  • the distance A is greater than or equal to the distance B. This ensures that a top sheet 1000 of sheet stack 100 caught by the first suction wheel 1 is reliably transferred to the second suction wheel 2 before a next succeeding sheet 1000 is sucked by the first suction wheel 1 and also transported.
  • the sheet feeder 10 has two height sensors 4.1 and 4.2, which serve on the one stacking of the stack 100, as well as the height adjustment of the unit from the first Saugrad 1 and lifting unit or separation unit 3.
  • the lifting unit or separation unit 3 is in the region of the trailing edge 100.1 of Arranged sheet stack 100 and is used to lift a respective top sheet 1000 from the sheet stack 100, whereby this top sheet is separated from the sheet stack.
  • the first suction wheel 1 is rotated at a rotational speed v1 and the second suction wheel 2 at a rotational speed v2.
  • the rotation speed v1 is always less than or equal to the rotation speed v2.
  • the sheet 1000 is greatly accelerated by the much larger rotation speed v2 of the second suction wheel 2. It is particularly advantageous if the sheet 1000 is accelerated by the second suction wheel 2 to the production speed of the folding station 12.
  • FIGS. 5a to 5d The mode of action of the non-circular Saugrads 1 goes out of the FIGS. 5a to 5d in the context of the figures described above.
  • Fig. 5a the suction process is shown.
  • An arc 1000 is sucked in by the suction region 24 of the suction wheel 1. Due to the larger radius rA in the suction region 24, the distance between an uppermost sheet 1000 of a sheet pile 100 is minimal and the uppermost sheet 1000 can be sucked in a secure and defined manner.
  • rotation of the Saugrads 1 of the sucked sheet is like in the FIGS. 5b and 5c shown held in the holding portion 25 of the Saugrad stressess 20 and transported on.
  • the sucked sheet 1000 is slightly lifted from the sheet stack 100, so that the underlying raised sheet can also be further increased and a separation air L between the raised sheet 1000 and the underlying even on the stack 100 bow 1000 can be blown to form a separating air cushion between the two sheets.
  • the sheet 1000 As in Fig. 5d shown, less sucked in the release area 26 so that it is easily released and passed, for example, to a subsequent transport device.
  • the subsequent transport device can, as is apparent from Fig. 4 results, also be designed as a suction, namely as a second suction, but in how known from the prior art embodiment, which is arranged below the sheet transport plane.
  • FIG. 6 An alternative construction of the suction wheel 1 is shown.
  • the suction wheel also consists of a plurality m of elements 21, 22, 23, wherein the elements may differ and do not have to have the same structure, in particular with respect to geometry and material.
  • a respective element 21, 22, 23 is formed by a partial body and the various partial bodies can be assembled to form a suction wheel 1. This makes it possible in an advantageous manner to customize the Saugrad 1 individually to its tasks and the boundary conditions of a job (eg grammage of the bow). This adaptation can be made by the machine operator.
  • the geometry of the non-circular suction wheel hereinafter also referred to as Formsaugrades, with different radii allows the design of several separated areas, hereinafter also referred to as segments.
  • the individual areas can also be used to control the vacuum, in which areas differently configured suction holes are provided by the number of suction holes is varied or by the suction holes are completely closed, for example by gluing.
  • the suction area has the property that the distance form-suction-arc stack is small (eg less than 4 mm) and thus can be optimally adjusted.
  • the suction of the underlying sheet is optimized in the starting phase and a so-called sucking (entrainment of the second sheet) is avoided.
  • the separating air can flow unhindered between the bow sucked on the suction wheel and the stack surface, so that an air cushion can form between the uppermost and the lower sheet.
  • the distance suction wheel sheet pile is optimized for the suction process and is e.g. 1-5 mm.
  • the sheet to be conveyed can be sucked well by suction air from the suction of the suction because of the small distance.
  • the distance suction wheel sheet pile is optimized for the separation air process and is e.g. 10-15 mm.
  • the sheet to be conveyed thus has a distance of 10 -15 mm to the stack surface and thus to the next sheet.
  • the underlying arch Due to the distance between suction wheel arch and stacking surface, which is increased by about 10 mm, the underlying arch can be optimally separated from the stack by means of separating air and prepared for transport.
  • the suction zone area is optimized for the defined sheet transfer "Formsaugrad-Transportelement".
  • the Saugzonen and the suction power of the subsequent conveyor system, so for example the effect of the second Saugrades be adjusted.
  • both the vacuum can be reduced and the material shape and material properties of the lateral surface can be changed.
  • the individual areas can be distributed several times over the circumference. For example, the areas can only be used once (cf. Fig. 3a ) or twice (cf. Fig. 3b ) or three times (cf. Fig. 3c ) be provided.

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

Description

Die Erfindung betrifft ein Saugrad mit den oberbegrifflichen Merkmalen von Anspruch 1 und einen Bogenanleger mit einem solchen Saugrad mit den Merkmalen von Anspruch 9.The invention relates to a suction wheel with the preamble features of claim 1 and a sheet feeder with such a suction wheel with the features of claim 9.

Stand der TechnikState of the art

Es ist aus dem Stand der Technik seit langem bekannt, dass Bogen in Bogenanlegern mittels geeigneter Hub- und / oder Fördermittel, beispielsweise mit Hilfe von Saugern und / oder Saugrädern, von einem Bogenstapel durch Anheben eines jeweils ersten Bogens separiert und die Bogen voneinander getrennt einer Bogen bearbeitenden Maschine, z. B. einer Bogenfalzmaschine, zugeführt werden. Die Bogen können dabei entweder beabstandet oder unterschuppt der Bogen verarbeitenden Maschine zugeführt werden.It has long been known from the prior art that sheets separated in sheet feeders by means of suitable lifting and / or conveying means, for example with the help of suckers and / or suction wheels of a sheet stack by lifting a respective first sheet and the sheets separated from each other Sheet processing machine, z. B. a sheet folding machine supplied. The sheets can either be spaced or underfold fed to the sheet processing machine.

In der DE 10 2008 048 287 A1 wird ein Bogenanleger einer Falzmaschine beschrieben, der im Bereich der Hinterkante eines Bogenstapels Hub- und Trennsauger und im vorderen Bereich des Stapels ein Saugrad aufweist. Durch eine Verstellung der Saugradposition wird dabei ermöglicht, den Unterschuppungsgrad der über einen nachfolgenden Transporttisch an eine nachfolgende Bogenfalzmaschine transportierten Bogen zu verändern. Durch das unterschuppte Falzen lässt sich die Leistungsfähigkeit der Falzmaschine deutlich steigern, ohne die Bogengeschwindigkeit in gleichem Maße erhöhen zu müssen. Dies gewährleistet eine geringere Belastung der Bogen und eine höhere Falzqualität.In the DE 10 2008 048 287 A1 a sheet feeder of a folding machine is described, which has in the region of the trailing edge of a sheet pile lifting and separating suction and in the front region of the stack a suction wheel. By adjusting the Saugradposition is thereby made possible to change the Unterschuppungsgrad the transported over a subsequent transport table to a subsequent Bogenfalzmaschine sheet. By submerged folding, the performance of the folding machine can be significantly increased without having to increase the bow speed to the same extent. This ensures a lower load on the bow and a higher folding quality.

Bei aus dem Stand der Technik bekannten Saugrädern ist der Abstand zwischen Saugrad und der Oberkante eines Bogenstapels, von dem das Saugrad jeweils den obersten Bogen abziehen soll, jeweils konstant. Um sicherzustellen, dass das rotierende Saugrad den jeweils obersten Bogen sicher greift, darf der Abstand zwischen Saugrad und Stapeloberkante nur in einem schmalen Bereich, in der Regel zwischen vier und sechs Millimetern, verstellt werden. Aufgrund des konstanten Abstandes kann es zu Ansaugstörungen kommen: wenn zwischen dem obersten Bogen und dem darunter liegenden Bogen kein trennendes Luftkissen gebildet wird, so kann es bei durchsaugenden Papieren zur Mitnahme von zwei Bogen durch das Saugrad kommen, so dass ein sogenannter Doppelbogen in eine nachfolgende Bogen bearbeitende Maschine übergeben wird. Eine weitere Ansaugstörung liegt darin begründet, dass aufgrund eines zu großen Abstandes zwischen Saugrad und Stapeloberkante der Zeitpunkt nicht exakt vorgebbar ist, zu welchem der oberste Bogen von dem Saugrad ergriffen wird. Bei einem zu kleinen Abstand des Saugrades von der Stapeloberkante hingegen kann zwischen dem obersten Bogen und dem darunter liegenden Bogen nur eingeschränkt ein trennendes Luftkissen erzeugt werden, da Trennluft aufgrund des geringen Abstandes kaum flächig unter den zu trennenden Bogen geblasen werden kann.In suction wheels known from the prior art, the distance between the suction wheel and the upper edge of a stack of sheets from which the suction wheel is to remove the uppermost sheet in each case is constant. To ensure that the rotating suction wheel securely grips the top sheet, the distance between the suction wheel and the stack top edge may only be adjusted within a narrow range, usually between four and six millimeters. Due to the constant distance it may be too Intake disturbances occur: if no separating air cushion is formed between the uppermost sheet and the underlying sheet, two sheets can pass through the suction wheel in through-sucking papers, so that a so-called double sheet is transferred to a subsequent sheet-processing machine. Another Ansaugstörung is due to the fact that due to a large distance between Saugrad and stack top edge of the time is not exactly predetermined, to which the uppermost arc is taken by the Saugrad. In the case of too small a distance of the suction wheel from the top of the stack, however, a separating air cushion can only be generated between the top sheet and the underlying sheet to a limited extent, since due to the small distance separating air can hardly be blown flat under the sheet to be separated.

Das Dokument DE 101 14 064 A1 offenbart ein Saugrad gemäss dem Oberbegriff des Anspruchs 1.The document DE 101 14 064 A1 discloses a suction wheel according to the preamble of claim 1.

Aufgabenstellungtask

Aufgabe der Erfindung ist es daher, ein Saugrad zu schaffen, welches ein sicheres und definiertes Greifen eines jeweils obersten Bogens eines Stapels ermöglicht.The object of the invention is therefore to provide a suction wheel, which allows a secure and defined gripping a respective top sheet of a stack.

Gelöst wird diese Aufgabe durch ein Saugrad mit den Merkmalen von Anspruch 1. Das erfindungsgemäße Saugrad besitzt einen um eine Drehachse rotierbaren Saugradkörper, wobei der Saugradkörper an seiner Mantelfläche mit einer Vielzahl von Saugöffnungen versehen ist zum Ansaugen und Transportieren von Bogen. Das Saugrad dient insbesondere dem Vereinzeln eines jeweils obersten Bogens von einem Bogenstapel. In vorteilhafter Weise ist der Saugradkörper unrund ausgeführt. Das heißt, der Radius des Saugradkörpers ist nicht im Bereich des ganzen Saugradkörpers konstant. In anderen Worten: der Abstand zwischen Drehachse des Saugradkörpers und der Umfangs- bzw. Mantelfläche des Saugradkörpers variiert. Im Gegensatz zu einem herkömmlichen kreisrunden Saugrad wird durch das erfindungsgemäße Saugrad in vorteilhafter Weise der Abstand zwischen der Mantelfläche des Saugradkörpers und einem obersten, von dem Saugrad zu ergreifenden Bogen während der Rotationsbewegung des Saugradkörpers verändert. Es gibt somit Zeitabschnitte, zu denen ein geringer Abstand vorliegt und ein Bogen leicht angesaugt werden kann, als auch Zeitabschnitte, zu denen ein großer Abstand vorliegt, zu dem leicht Trennluft zwischen den obersten Bogen und den darunter liegenden Bogen geblasen werden kann, um ein Luftkissen zwischen den beiden Bogen zu erzeugen. Unter einem Saugrad wird in dieser Anmeldung auch ein Saugrad mit umlaufendem Riemen einer Vorrichtung zur Abnahme von Bogen von einem Stapel verstanden, wie es in der DE 196 32 657 C1 und der DE 196 48 742 A1 beschrieben ist.The suction wheel according to the invention has a Saugradkörper rotatable about an axis of rotation, wherein the Saugradkörper is provided on its lateral surface with a plurality of suction openings for sucking and transporting sheets. The suction wheel is used in particular for separating a respective uppermost sheet from a stack of sheets. Advantageously, the Saugradkörper is executed out of round. That is, the radius of the Saugradkörpers is not constant in the region of the entire Saugradkörpers. In other words, the distance between the axis of rotation of the Saugradkörpers and the peripheral or lateral surface of the Saugradkörpers varies. In contrast to a conventional circular suction wheel is advantageously changed by the suction wheel according to the invention, the distance between the lateral surface of the Saugradkörpers and a top, to be taken by the suction wheel during the rotational movement of the Saugradkörpers. Thus, there are periods of time when there is a short distance and an arc can be easily sucked, as well as periods where there is a great distance to the easily separating air between the uppermost arc and the underlying one Sheet can be blown to create an air cushion between the two sheets. In this application, a suction wheel is also understood to mean a suction wheel with a belt that circulates around a device for removing sheets from a stack, as shown in FIG DE 196 32 657 C1 and the DE 196 48 742 A1 is described.

Der Saugradkörper ist in n gleich große Segmente unterteilt, wobei n eine natürliche Zahl ist mit n = 1, 2, 3, 4 usw. und ein jeweiliges Segment einen Ansaugbereich zum Ansaugen eines Bogens, einen Haltebereich zum Halten und Fördern eines Bogens und einen Freigabebereich zum Freigeben eines Bogens besitzt. Durch das Vorsehen von Segmenten mit unterschiedlichen Funktionalitäten kann das erfindungsgemäße Saugrad vorteilhafterweise Aufgaben eines aus dem Stand der Technik bekannten Hub- und Schleppsaugers bei wesentlich einfacherem Aufbau erfüllen. Ansaugbereich, Haltebereich und Freigabebereich sind voneinander unterschiedlich, d.h. nicht identisch.The Saugradkörper is divided into n equal segments, where n is a natural number with n = 1, 2, 3, 4, etc. and a respective segment a suction area for sucking a sheet, a holding area for holding and conveying a sheet and a release area to share an arc. By providing segments with different functionalities, the suction wheel according to the invention can advantageously fulfill the tasks of a known from the prior art lifting and Schleppsaugers with much simpler structure. Aspiration area, holding area and release area are different from each other, i. not identical.

In vorteilhafter Weiterbildung des erfindungsgemäßen Saugrads ist der Radius des Saugkörpers im Ansaugbereich größer als der Radius des Saugkörpers im Haltebereich. Durch den größeren Radius des Saugkörpers im Ansaugbereich wird sichergestellt, dass während dem Ansaugen eines Bogens der Abstand zwischen den Saugöffnungen des Saugkörpers und dem anzusaugenden Bogen besonders gering ist. Damit ist zum einen sichergestellt, dass der Bogen zuverlässig angesaugt wird, als auch zum anderen, dass der Zeitpunkt genauer vorgebbar ist, zu welchem ein jeweils oberster Bogen von dem Saugrad erfasst wird. Die Reduktion des Radius des Saugkörpers im Haltebereich ermöglicht, dass der oberste, angehobene Bogen relativ zum darunter liegenden Bogen weiter angehoben wird und zwischen dem obersten und dem darunter liegenden Bogen durch Einbringen einer Trennluft ein Luftkissen erzeugt werden kann.In an advantageous development of the suction wheel according to the invention, the radius of the absorbent body in the suction region is greater than the radius of the absorbent body in the holding region. Due to the larger radius of the absorbent body in the suction ensures that during the suction of a sheet, the distance between the suction holes of the absorbent body and the suctioned sheet is particularly low. This ensures, on the one hand, that the sheet is reliably sucked in, and, on the other hand, that the time is more precisely predetermined, at which a respective uppermost sheet is detected by the suction wheel. The reduction of the radius of the absorbent body in the holding area allows the uppermost raised sheet to be further raised relative to the underlying sheet, and an air cushion to be created between the uppermost sheet and the underlying sheet by introducing a separating air.

In einer vorteilhaften Weiterbildung ist die Saugwirkung des Saugrads im Freigabebereich geringer als im Ansaugbereich und im Haltebereich. So kann der Saugradkörper insbesondere im Freigabebereich weniger Saugöffnungen pro Flächeneinheit aufweisen als im Ansaugbereich und im Haltebereich. Im Extremfall besitzt der Saugradkörper im Freigabebereich gar keine Saugöffnungen oder die Saugöffnungen sind, zumindest teilweise, abgeklebt oder verschlossen. Aufgrund der reduzierten Saugwirkung wird ein jeweiliger Bogen nicht mehr so stark gehalten wie noch zuvor und kann einfach freigegeben und beispielsweise an eine nachfolgende Transporteinheit übergeben werden.In an advantageous development, the suction effect of the suction wheel in the release area is lower than in the intake area and in the holding area. Thus, the Saugradkörper can have fewer suction openings per unit area, especially in the release area as in the intake and in the holding area. In extreme cases, the Saugradkörper in the release area has no suction or the suction openings are, at least partially, taped or closed. Due to the reduced suction, a respective sheet is no longer held as strong as before and can be easily released and passed, for example, to a subsequent transport unit.

In einer vorteilhaften Weiterbildung des erfindungsgemäßen Saugrads ist die Oberflächenbeschaffenheit der Mantelfläche des Saugradkörpers im Ansaugbereich und / oder im Haltebereich und / oder im Freigabebereich unterschiedlich. So können insbesondere unterschiedliche Reibbeiwerte, auch als Reibungsbeiwerte bezeichnet, vorliegen. Dies kann entweder durch die Wahl unterschiedlicher Materialien oder aber auch durch unterschiedliche Oberflächenbearbeitung erreicht werden. So kann beispielsweise die Mantelfläche im Ansaugbereich aus Polyurethan (PU), die Mantelfläche im Haltebereich aus Stahl und die Mantelfläche im Freigabebereich aus einem verchromten Material gebildet sein. Weiterhin vorteilhaft ist es, wenn der Haftreibungskoeffizient der Mantelteilfläche im Freigabebereich geringer ist als der Haftreibungskoeffizient der Mantelteilfläche im Haltebereich.In an advantageous development of the suction wheel according to the invention, the surface condition of the lateral surface of the suction wheel body is different in the intake region and / or in the holding region and / or in the release region. In particular, different friction coefficients, also referred to as friction coefficients, may be present. This can be achieved either by choosing different materials or by different surface treatment. Thus, for example, the lateral surface in the intake region of polyurethane (PU), the lateral surface in the holding region made of steel and the lateral surface in the release region may be formed of a chromium-plated material. It is also advantageous if the coefficient of static friction of the casing part surface in the release region is lower than the static friction coefficient of the casing part surface in the holding region.

In einer Ausführungsform des Saugrades ist die Mantelteilfläche des Saugradkörpers im Ansaugbereich als ebene Fläche ausgeführt. Damit wird in vorteilhafter Weise erreicht, dass der gesamte Ansaugbereich im Moment des Ansaugens in etwa einen konstanten Abstand zum obersten Bogen eines Stapels besitzt und der Bogen sicher und definiert angesaugt werden kann.In one embodiment of the suction wheel, the casing part surface of the Saugradkörpers is designed in the suction as a flat surface. This is achieved in an advantageous manner that the entire suction at the moment of suction has approximately a constant distance from the top sheet of a stack and the sheet can be sucked safely and defined.

Aufgabe der Erfindung ist es auch, einen Bogenanleger für eine Bogen bearbeitende Maschine zu schaffen, welcher sicher vereinzelte und wie gewünscht beabstandete Bogen der Bogen bearbeitenden Maschine zuführt.The object of the invention is also to provide a sheet feeder for a sheet-processing machine, which safely separated and as desired spaced sheet feeds the sheet-processing machine.

Gelöst wird diese Aufgabe durch einen Bogenanleger gemäß Anspruch 9. Dieser Bogenanleger für eine Bogen bearbeitende Maschine dient dem Anheben und Vereinzeln von Bogen von einem Stapel mit mindestens einem wie obenstehend beschriebenen Saugrad. Dabei ist das Saugrad oberhalb des Stapels angeordnet und wirkt auf einen jeweiligen obersten Bogen des Stapels.This object is achieved by a sheet feeder according to claim 9. This sheet feeder for a sheet-processing machine is used for lifting and separating sheets from a stack with at least one suction wheel as described above. In this case, the suction wheel is arranged above the stack and acts on a respective uppermost arc of the stack.

Die beschriebene Erfindung und die beschriebenen vorteilhaften Weiterbildungen der Erfindung stellen auch in beliebiger Kombination miteinander vorteilhafte Weiterbildungen der Erfindung dar.The described invention and the described advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

Hinsichtlich weiterer Vorteile und in konstruktiver und funktioneller Hinsicht vorteilhafter Ausgestaltungen der Erfindung wird auf die Unteransprüche sowie die Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden Zeichnungen verwiesen.With regard to further advantages and constructive and functional aspects of advantageous embodiments of the invention, reference is made to the dependent claims and the description of embodiments with reference to the accompanying drawings.

Ausführungsbeispielembodiment

Die Erfindung soll an Hand bevorzugter Ausführungsbeispiele noch näher erläutert werden. Es zeigen in schematischer Darstellung

Fig. 1a
eine erste Variante des erfindungsgemäßen Saugrads
Fig. 1b
eine zweite Variante des Saugrads
Fig. 2a
das Saugrad in einer 3D-Darstellung
Fig. 2b
eine Variante des Saugrads
Fig. 3a-c
Saugräder mit ein, zwei bzw. drei Segmenten
Fig. 4
einen Bogenanleger mit dem erfindungsgemäßen Saugrad
Fig. 5a-d
den Ablauf des Ansaugens und Transportierens mittels eines erfindungsgemäßen Saugrads
Fig. 6
einen alternativen Aufbau des Saugrads
The invention will be explained in more detail with reference to preferred embodiments. It show in a schematic representation
Fig. 1a
a first variant of the Saugrads invention
Fig. 1b
a second variant of the suction wheel
Fig. 2a
the suction wheel in a 3D representation
Fig. 2b
a variant of the suction wheel
Fig. 3a-c
Suction wheels with one, two or three segments
Fig. 4
a sheet feeder with the suction wheel according to the invention
Fig. 5a-d
the sequence of suction and transport by means of a Saugrads invention
Fig. 6
an alternative construction of the suction wheel

Einander entsprechende Elemente und Bauteile sind in den Figuren mit gleichen Bezugszeichen versehen.Corresponding elements and components are provided in the figures with the same reference numerals.

Fig. 1a zeigt ein erfindungsgemäßes Saugrad 1 in einer ersten Variante: das Saugrad 1 besitzt einen Saugradkörper 20 und ist in ein erstes Segment 21 und ein zweites Segment 22 unterteilt. Ein jeweiliges Segment 21, 22 besitzt einen Ansaugbereich 24, einen Haltebereich 25 und einen Freigabebereich 26. Der Ansaugbereich 24 dient dem Ansaugen von hier nicht dargestellten Bogen. Der Haltebereich 25 dient dem Halten der angesaugten Bogen und dem Transportieren der Bogen während der Rotation des Saugrads 1. Der Freigabebereich 26 dient dem Freigeben von angesaugten Bogen, um diese beispielsweise an eine nachfolgende Transporteinrichtung übergeben zu können. Der Saugradkörper 20 des Saugrads 1 ist unrund ausgeführt. Das heißt, dass der Saugradkörper 20 keinen einheitlichen Radius aufweist. Vielmehr ist der Radius rA des Saugradkörpers 20 im Ansaugbereich 24 größer als der Radius rH im Haltebereich 25. Der Übergang zwischen dem kleineren Radius rH und dem größeren Radius rA ist dabei fließend gestaltet. In seinem Betrieb wird das Saugrad 1 mit Saugluft beaufschlagt und um die Rotationsachse 29 rotiert. Fig. 1a shows a suction wheel 1 according to the invention in a first variant: the suction wheel 1 has a Saugradkörper 20 and is divided into a first segment 21 and a second segment 22. A respective segment 21, 22 has a suction region 24, a holding region 25 and a release region 26. The suction region 24 serves to suck in sheets not shown here. The holding portion 25 serves to hold the sucked sheet and transporting the sheet during the rotation of the Saugrads 1. The Release area 26 is used to release sucked sheet in order to be able to pass this, for example, to a subsequent transport device. The Saugradkörper 20 of the Saugrads 1 is executed out of round. That is, the Saugradkörper 20 has no uniform radius. Instead, the radius rA of the suction wheel body 20 in the intake region 24 is greater than the radius rH in the holding region 25. The transition between the smaller radius rH and the larger radius rA is designed to be fluid. In its operation, the suction wheel 1 is acted upon by suction and rotated about the axis of rotation 29.

In Fig. 1b ist ein Saugrad 1 dargestellt, dessen Saugradkörper 20 alternativ gestaltet wurde: die Mantelfläche 28 (nicht dargestellt) des Saugradkörpers 20 im Ansaugbereich 24 wurde als ebene Fläche ausgestaltet. Ein sich unterhalb des Saugrads 1 befindlicher Bogen 1000 kann dadurch besonders sicher angesaugt werden.In Fig. 1b a suction wheel 1 is shown, the Saugradkörper 20 was designed alternatively: the lateral surface 28 (not shown) of the Saugradkörpers 20 in the intake 24 was designed as a flat surface. A located below the Saugrads 1 sheet 1000 can be sucked particularly safe.

Wie in Fig. 2a dargestellt, ist die Mantelfläche 28 des Saugradkörpers mit Saugöffnungen 27 versehen, durch welche die Saugluft wirksam wird. Die Anzahl der Saugöffnungen 27 pro Flächeneinheit kann im Ansaugbereich 24, dem Haltebereich 25 und dem Freigabebereich 26 unterschiedlich sein. Im Ansaugbereich 24 ist der Bedarf einer besonders hohen Saugkraft gegeben, da hier ein Bogen 1000 (nicht dargestellt) erstmalig vom Saugrad 1 angesaugt wird. Im Haltebereich 25 muss die Saugkraft so groß sein, dass ein jeweiliger, im Ansaugbereich 24 angesaugter Bogen 1000 gehalten und somit transportiert werden kann. Im Freigabebereich 26 sollte die Saugkraft geringer ausfallen, um so die Freigabe und Übergabe eines jeweiligen Bogens 1000 zu vereinfachen. Daher wurde im Saugradkörper 20 im Freigabebereich 26 die Anzahl Saugöffnungen 27 pro Flächeneinheit im Gegensatz zum Haltebereich 25 und dem Ansaugbereich 24 reduziert. Alternativ können die Saugöffnungen 27 - wie in Fig. 2b dargestellt - auch verschlossen werden oder durch Bekleben der Mantelteilfläche 28.1 des Freigabebereichs 26 abgedeckt und somit außer Wirkung gebracht werden.As in Fig. 2a illustrated, the lateral surface 28 of the Saugradkörpers is provided with suction openings 27 through which the suction air is effective. The number of suction openings 27 per unit area may be different in the suction area 24, the holding area 25 and the release area 26. In the intake 24, the need for a particularly high suction power is given, since here a sheet 1000 (not shown) is sucked for the first time by the suction wheel 1. In the holding region 25, the suction force has to be so great that a respective sheet 1000 sucked in the suction region 24 can be held and thus transported. In the release area 26, the suction force should be lower so as to facilitate the release and transfer of each sheet 1000. Therefore, in Saugaunkörper 20 in the release area 26, the number of suction ports 27 per unit area in contrast to the holding area 25 and the intake area 24 is reduced. Alternatively, the suction openings 27 - as in Fig. 2b represented - are also closed or covered by gluing the shell part surface 28.1 of the release area 26 and thus brought out of action.

Alternativ zu der in den Figuren 1a, 1b und 2a, 2b und 3b dargestellten Ausführung des Saugradkörpers 20 mit zwei Segmenten 21, 22 kann der Saugradkörper 20, wie in Fig. 3a dargestellt, auch nur ein erstes Segment 21 aufweisen, welches dann einen Ansaugbereich 24, einen Haltebereich 25 und einen Freigabebereich 26 aufweist. Wie in Fig. 3c dargestellt, kann der Saugradkörper 20 jedoch auch eine größere Anzahl an Segmenten 21, 22, 23 aufweisen, wobei auch hier jedes Segment einen Ansaugbereich 24, einen Haltebereich 25 und einen Freigabebereich 26 besitzt.Alternatively to the in the FIGS. 1a, 1b and 2a . 2 B and 3b illustrated embodiment of the Saugradkörpers 20 with two segments 21, 22, the Saugradkörper 20, as in Fig. 3a shown, also have only a first segment 21, which then has a suction 24, a holding portion 25 and a release portion 26 has. As in Fig. 3c However, the Saugradkörper 20 may also have a greater number of segments 21, 22, 23, wherein also here each segment has a suction 24, a holding portion 25 and a release portion 26 has.

Fig. 4 zeigt einen Bogenanleger 10, in welchem ein erfindungsgemäßes Saugrad 1 eingesetzt wird zum Vereinzeln von Bogen 1000 von einem Bogenstapel 100 und Zuführen der vereinzelten Bogen 1000 über einen Zuführtisch 11 zu einer Bogen bearbeitenden Maschine 12, welche hier als Taschenfalzstation einer Bogenfalzmaschine dargestellt ist. Zur einfacheren Darstellung ist dieses Saugrad 1 dabei als Kreis dargestellt; es ist jedoch selbstverständlich, dass das Saugrad 1 die wie obenstehend beschriebene vorteilhafte Ausführung besitzt.
Der Bogenanleger 10 besitzt ein erstes, erfindungsgemäß ausgeführtes Saugrad 1 als auch ein zweites Saugrad 2. Das erste Saugrad 1 ist oberhalb des Bogenstapels 100 angeordnet, während das zweite Saugrad 2 unterhalb der Bogentransportebene E und - in Bogentransportrichtung T gesehen - stromabwärtig des Stapels 100 angeordnet ist. Die Rotationsachse des ersten Saugrads 1 besitzt einen Abstand A zur Stapelhinterkante 100.1 des Bogenstapels 100. Das zweite Saugrad 2 ist in einem Abstand B vor der Stapelvorderkante 100.2 des Bogenstapels 100 angeordnet. Der Abstand A ist dabei größer oder gleich dem Abstand B. Dadurch wird sichergestellt, dass ein vom ersten Saugrad 1 ergriffener oberster Bogen 1000 des Bogenstapels 100 sicher an das zweite Saugrad 2 übergeben wird, bevor ein nächster nachfolgender Bogen 1000 von dem ersten Saugrad 1 angesaugt und ebenfalls transportiert wird. Der Bogenanleger 10 besitzt zwei Höhensensoren 4.1 und 4.2, welche zum einen der Stapelnachführung des Stapels 100 dienen, als auch der Höhenanpassung der Einheit aus erstem Saugrad 1 und Hubeinheit bzw. Separationseinheit 3. Die Hubeinheit bzw. Separationseinheit 3 ist im Bereich der Hinterkante 100.1 des Bogenstapels 100 angeordnet und dient dem Anheben eines jeweils obersten Bogens 1000 vom Bogenstapel 100, wodurch dieser oberste Bogen von dem Bogenstapel separiert wird. Stromabwärtig des zweiten Saugrads 2 befindet sich ein Sensor 5, durch welchen Doppelbogen bzw. Mehrfachbogen sowie der Abstand zwischen einzelnen Bogen bzw. der Unterschuppungsgrad der Bogen detektiert werden kann. Sollte durch den Sensor 5 ein Fehler festgestellt werden, so kann der entsprechende Bogen 1000 an dieser Stelle noch ausgeschleust oder dessen Position im Bogenstrom korrigiert werden. Fig. 4 shows a sheet feeder 10, in which a suction wheel according to the invention 1 is used for separating sheets 1000 from a sheet stack 100 and feeding the separated sheets 1000 via a feed table 11 to a sheet-processing machine 12, which is shown here as Taschenfalzstation a sheet folding machine. For ease of illustration, this Saugrad 1 is shown as a circle; however, it is to be understood that the suction wheel 1 has the advantageous embodiment as described above.
The sheet feeder 10 has a first, according to the invention carried out Saugrad 1 and a second Saugrad 2. The first Saugrad 1 is disposed above the sheet stack 100, while the second Saugrad 2 below the sheet transport plane E and - seen in the sheet transport direction T - arranged downstream of the stack 100 is. The axis of rotation of the first Saugrads 1 has a distance A to the stack trailing edge 100.1 of the sheet stack 100. The second Saugrad 2 is arranged at a distance B in front of the stack leading edge 100.2 of the sheet stack 100. The distance A is greater than or equal to the distance B. This ensures that a top sheet 1000 of sheet stack 100 caught by the first suction wheel 1 is reliably transferred to the second suction wheel 2 before a next succeeding sheet 1000 is sucked by the first suction wheel 1 and also transported. The sheet feeder 10 has two height sensors 4.1 and 4.2, which serve on the one stacking of the stack 100, as well as the height adjustment of the unit from the first Saugrad 1 and lifting unit or separation unit 3. The lifting unit or separation unit 3 is in the region of the trailing edge 100.1 of Arranged sheet stack 100 and is used to lift a respective top sheet 1000 from the sheet stack 100, whereby this top sheet is separated from the sheet stack. Downstream of the second suction wheel 2 there is a sensor 5, by means of which double sheets or multiple sheets as well as the distance between individual sheets or the degree of subflooring of the sheets can be detected. Should an error can be detected by the sensor 5, the corresponding sheet 1000 can still be discharged at this point or its position can be corrected in the arc current.

Wie durch Rotationspfeile angedeutet, wird das erste Saugrad 1 mit einer Rotationsgeschwindigkeit v1 und das zweite Saugrad 2 mit einer Rotationsgeschwindigkeit v2 rotiert. Die Rotationsgeschwindigkeit v1 ist dabei immer kleiner oder gleich der Rotationsgeschwindigkeit v2. In anderen Worten: Während das erste Saugrad 1 einen Bogen 1000 mit geringerer Rotationsgeschwindigkeit v1 und damit höherer Genauigkeit und geringerer Gefahr der Beschädigung des Bogens 1000 ansaugt und transportiert, wird durch die wesentlich größere Rotationsgeschwindigkeit v2 des zweiten Saugrads 2 der Bogen 1000 stark beschleunigt. Besonders vorteilhaft ist es, wenn der Bogen 1000 von dem zweiten Saugrad 2 auf die Produktionsgeschwindigkeit der Falzstation 12 beschleunigt wird.As indicated by rotation arrows, the first suction wheel 1 is rotated at a rotational speed v1 and the second suction wheel 2 at a rotational speed v2. The rotation speed v1 is always less than or equal to the rotation speed v2. In other words, while the first suction wheel 1 sucks and transports a sheet 1000 with a lower rotation speed v1 and thus higher accuracy and lower risk of damage to the sheet 1000, the sheet 1000 is greatly accelerated by the much larger rotation speed v2 of the second suction wheel 2. It is particularly advantageous if the sheet 1000 is accelerated by the second suction wheel 2 to the production speed of the folding station 12.

Die Wirkweise des unrunden Saugrads 1 geht aus den Figuren 5a bis 5d im Zusammenhang mit den vorstehend beschriebenen Figuren näher hervor. In Fig. 5a ist der Ansaugvorgang dargestellt. Ein Bogen 1000 wird vom Ansaugbereich 24 des Saugrads 1 angesaugt. Aufgrund des größeren Radius rA im Ansaugbereich 24 ist der Abstand zwischen einem obersten Bogen 1000 eines Bogenstapels 100 minimal und der oberste Bogen 1000 kann sicher und definiert angesaugt werden. Durch Rotation des Saugrads 1 wird der angesaugte Bogen wie in den Figuren 5b und 5c dargestellt, im Haltebereich 25 des Saugradkörpers 20 gehalten und so weiter transportiert. Aufgrund des geringeren Radius rH im Haltebereich 25 wird der angesaugte Bogen 1000 dabei leicht vom Bogenstapel 100 angehoben, so dass der darunterliegende angehobene Bogen ebenfalls weiter angehoben werden kann und eine Trennluft L zwischen den angehobenen Bogen 1000 und den darunter noch auf dem Stapel 100 liegenden Bogen 1000 geblasen werden kann zur Ausbildung eines trennenden Luftkissens zwischen beiden Bogen. Bevor ein nächster Bogen von dem Saugrad 1 angesaugt und transportiert werden kann, wird der Bogen 1000, wie in Fig. 5d dargestellt, im Freigabebereich 26 weniger stark angesaugt, so dass er einfach freigegeben und beispielsweise an eine nachfolgende Transporteinrichtung übergeben wird. Die nachfolgende Transporteinrichtung kann dabei, wie sich aus Fig. 4 ergibt, ebenfalls als Saugrad ausgeführt sein, nämlich als zweites Saugrad, jedoch in wie aus dem Stand der Technik bekannter Ausführung, welches unterhalb der Bogentransportebene angeordnet ist.The mode of action of the non-circular Saugrads 1 goes out of the FIGS. 5a to 5d in the context of the figures described above. In Fig. 5a the suction process is shown. An arc 1000 is sucked in by the suction region 24 of the suction wheel 1. Due to the larger radius rA in the suction region 24, the distance between an uppermost sheet 1000 of a sheet pile 100 is minimal and the uppermost sheet 1000 can be sucked in a secure and defined manner. By rotation of the Saugrads 1 of the sucked sheet is like in the FIGS. 5b and 5c shown held in the holding portion 25 of the Saugradkörpers 20 and transported on. Due to the smaller radius rH in the holding region 25, the sucked sheet 1000 is slightly lifted from the sheet stack 100, so that the underlying raised sheet can also be further increased and a separation air L between the raised sheet 1000 and the underlying even on the stack 100 bow 1000 can be blown to form a separating air cushion between the two sheets. Before a next sheet can be sucked and transported by the suction wheel 1, the sheet 1000, as in Fig. 5d shown, less sucked in the release area 26 so that it is easily released and passed, for example, to a subsequent transport device. The subsequent transport device can, as is apparent from Fig. 4 results, also be designed as a suction, namely as a second suction, but in how known from the prior art embodiment, which is arranged below the sheet transport plane.

In Fig. 6 wird ein alternativer Aufbau des Saugrads 1 gezeigt. Das Saugrad besteht dabei ebenfalls aus einer Mehrzahl m von Elementen 21, 22, 23, wobei sich die Elemente unterscheiden können und nicht den gleichen Aufbau haben müssen, insbesondere bezüglich Geometrie und Material. Ein jeweiliges Element 21, 22, 23 wird durch einen Teilkörper gebildet und die verschiedenen Teilkörper können zu einem Saugrad 1 zusammengesetzt werden. Dadurch wird in vorteilhafter Weise ermöglich, das Saugrad 1 individuell an seine Aufgaben und die Randbedingungen eines Auftrags anzupassen (z.B. Grammatur der Bogen). Diese Anpassung kann dabei vom Maschinenbediener vorgenommen werden.In Fig. 6 An alternative construction of the suction wheel 1 is shown. The suction wheel also consists of a plurality m of elements 21, 22, 23, wherein the elements may differ and do not have to have the same structure, in particular with respect to geometry and material. A respective element 21, 22, 23 is formed by a partial body and the various partial bodies can be assembled to form a suction wheel 1. This makes it possible in an advantageous manner to customize the Saugrad 1 individually to its tasks and the boundary conditions of a job (eg grammage of the bow). This adaptation can be made by the machine operator.

Die Geometrie des unrunden Saugrads, nachfolgend auch als Formsaugrades bezeichnet, mit unterschiedlichen Radien erlaubt die Gestaltung mehrerer abgetrennter Bereiche, nachfolgend auch als Segmente bezeichnet.
Die einzelnen Bereiche können auch zur Steuerung des Vakuums genutzt werden, indem in den Bereichen verschieden ausgestaltete Sauglöcher vorgesehen sind, indem die Anzahl der Sauglöcher variiert wird oder indem die Sauglöcher ganz verschlossen werden, z.B. durch Bekleben.
Der Ansaugbereich hat die Eigenschaft, dass der Abstand Formsaugrad -Bogenstapel gering ist (z.B. kleiner 4 mm) und somit optimal eingestellt werden kann. Durch die Drehbewegung des Formsaugrads und Mitnahme des Bogens verschiebt sich der Ansaugbereich und der im Radius verringerte Trennluftbereich hebt den Bogen bei gleichzeitiger Förderung an. Das Ansaugen der darunterliegenden Bogen wird in der Startphase optimiert und ein sogenanntes Durchsaugen (Mitnahme des zweiten Bogens) wird vermieden. Die Trennluft kann ungehindert zwischen dem am Saugrad angesaugten Bogen und der Stapeloberfläche durchblasen, sodass sich ein Luftkissen zwischen oberstem und darunter liegendem Bogen ausbilden kann.
Nachfolgend werden die verschiedenen Segmente näher beschrieben.The geometry of the non-circular suction wheel, hereinafter also referred to as Formsaugrades, with different radii allows the design of several separated areas, hereinafter also referred to as segments.
The individual areas can also be used to control the vacuum, in which areas differently configured suction holes are provided by the number of suction holes is varied or by the suction holes are completely closed, for example by gluing.
The suction area has the property that the distance form-suction-arc stack is small (eg less than 4 mm) and thus can be optimally adjusted. By the rotational movement of the Formsaugrads and entrainment of the arc, the intake moves and the reduced in the radius separation air range raises the bow with simultaneous promotion. The suction of the underlying sheet is optimized in the starting phase and a so-called sucking (entrainment of the second sheet) is avoided. The separating air can flow unhindered between the bow sucked on the suction wheel and the stack surface, so that an air cushion can form between the uppermost and the lower sheet.
The different segments are described in more detail below.

Ansaugbereich:intake:

Der Abstand Saugrad- Bogenstapel ist für den Ansaugprozess optimiert und beträgt z.B. 1-5 mm.The distance suction wheel sheet pile is optimized for the suction process and is e.g. 1-5 mm.

Der zu fördernde Bogen kann wegen des geringen Abstandes mittels Saugluft gut von dem Ansaugbereich des Saugrades angesaugt werden.The sheet to be conveyed can be sucked well by suction air from the suction of the suction because of the small distance.

Halte- und Trennluftbereich:Holding and separating air area:

Der Abstand Saugrad- Bogenstapel ist für den Trennluftprozess optimiert und beträgt z.B. 10-15 mm.The distance suction wheel sheet pile is optimized for the separation air process and is e.g. 10-15 mm.

Der zu fördernde Bogen hat somit einen Abstand von 10 -15 mm zur Stapeloberfläche und damit zum nächsten Bogen.The sheet to be conveyed thus has a distance of 10 -15 mm to the stack surface and thus to the next sheet.

Durch den um ca. 10 mm vergrößerten Abstand Saugrad- Bogen und Stapeloberfläche kann der darunter liegende Bogen mittels Trennluft optimal vom Stapel separiert und für die Förderung vorbereitet werden.Due to the distance between suction wheel arch and stacking surface, which is increased by about 10 mm, the underlying arch can be optimally separated from the stack by means of separating air and prepared for transport.

Freigabe- bzw. Übergabebereich:Release or transfer area:

Der Saugzonenbereich ist für die definierte Bogenübergabe "Formsaugrad-Transportelement" optimiert.
Je nach Anforderung kann die Saugzonenausbildung und die Saugleistung dem nachfolgenden Fördersystem, also z.B. der Wirkung des zweiten Saugrades angepasst werden.
Hierbei kann sowohl das Vakuum reduziert als auch die Materialform und Materialeigenschaft der Mantelfläche verändert werden.The suction zone area is optimized for the defined sheet transfer "Formsaugrad-Transportelement".
Depending on the requirements, the Saugzonenausbildung and the suction power of the subsequent conveyor system, so for example the effect of the second Saugrades be adjusted.
In this case, both the vacuum can be reduced and the material shape and material properties of the lateral surface can be changed.

Die einzelnen Bereiche können mehrfach n über den Umfang verteilt sein. So können die Bereiche z.B. nur einmal (vgl. Fig. 3a) oder zweimal (vgl. Fig. 3b) oder dreimal (vgl. Fig. 3c) vorgesehen sein.The individual areas can be distributed several times over the circumference. For example, the areas can only be used once (cf. Fig. 3a ) or twice (cf. Fig. 3b ) or three times (cf. Fig. 3c ) be provided.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Erstes SaugradFirst suction wheel
22
Zweites SaugradSecond suction wheel
33
Hubeinheit/SeparationseinheitLifting unit / separation unit
4.14.1
Höhensensorheight sensor
4.24.2
Höhensensorheight sensor
55
Sensorsensor
1010
Bogenanlegersheet feeder
1111
Zuführtischfeed
1212
Falzstation (Bogen bearbeitende Maschine)Folding station (sheet processing machine)
2020
SaugradkörperSaugradkörper
2121
erstes Segmentfirst segment
2222
zweites Segmentsecond segment
2323
drittes Segmentthird segment
2424
Ansaugbereichsuction
2525
Haltebereichholding area
2626
Freigabebereichrelease area
2727
Saugöffnungsuction opening
2828
Mantelfläche SaugradkörperLateral surface suction wheel body
28.128.1
Mantelfläche FreigabebereichLateral surface release area
2929
Rotationsachseaxis of rotation
100100
Bogenstapelsheet pile
100.1100.1
StapelhinterkanteStack trailing edge
100.2100.2
StapelvorderkanteStack front edge
10001000
Bogenarc
r Ar A
Radius AnsaugbereichRadius intake area
r Hr H
Radius HaltebereichRadius holding area
v1v1
Rotationsgeschwindigkeit 1. SaugradRotation speed 1. Suction wheel
v2v2
Rotationsgeschwindigkeit 2. SaugradRotation speed 2. Suction wheel
AA
Abstand 1. SaugradDistance 1. Suction wheel
BB
Abstand 2. SaugradDistance 2. Suction wheel
Ee
BogentransportebeneSheet transport plane
LL
Blasluft als TrennluftBlown air as separation air
TT
Transportrichtungtransport direction

Claims (9)

  1. Suction wheel (1) with a suction wheel body (20) rotatable about an axis (29) of rotation and provided with a plurality of suction openings (27) formed in its circumferential surface (28) for attracting sheets (1000) by suction and transporting them, the suction wheel body (20) being of non-circular design,
    wherein the suction wheel body (20) is subdivided into n segments (21, 22, 23) of essentially equal size, with n = 1, 2, 3, 4...,
    characterized
    in that each segment (21, 22, 23) includes an attraction area (24) for attracting a sheet (1000) by suction, a retaining area (25) for retaining and conveying a sheet (1000), and a release area (26) for releasing a sheet (1000), the attraction area (24), the retaining area (25), and the release area (26) being different from each other.
  2. Suction wheel according to claim 1,
    characterized
    in that the suction wheel body (20) is formed of m elements (21, 22, 23), with m = 1, 2, 3, 4..., and in that the respective elements (21, 22, 23) may be assembled to form the suction wheel (1).
  3. Suction wheel according to claim 1 or 2,
    characterized
    in that a radius (rA) of the suction body (20) in the attraction area (24) is greater than a radius (rH) of the suction body (20) in the retaining area (25).
  4. Suction wheel according to any one of claims 1 to 3,
    characterized
    in that the suction effect of the suction wheel (1) in the release area (26) is weaker than in the attraction area (24) and in the retaining area (25).
  5. Suction wheel according to claim 4,
    characterized
    in that in the release area (26), the suction wheel body (20) has fewer suction openings (27) per unit of area than in the attraction area (24) and in the retaining area (25).
  6. Suction wheel according to any one of claims 1 to 5,
    characterized
    in that the circumferential surface (28) of the suction wheel body (20) has different surface properties, in particular different coefficients of friction, in the attraction area (24) and/or in the retaining area (25) and/or in the release area.
  7. Suction wheel according to claim 6,
    characterized
    in that the coefficient of static friction of the circumferential surface portion (28.1) in the release area (26) is lower than the coefficient of static friction of the circumferential surface portion in the retaining area (25).
  8. Suction wheel according to any one of the preceding claims,
    characterized
    in that the circumferential surface portion of the suction wheel body (20) in the attraction area (24) is a flat surface.
  9. Sheet feeder (10) for lifting sheets (100) off a stack (100) and for separating the sheets (1000) from the stack (100) using at least one suction wheel (1) according to any one of the preceding claims in a machine (12) for processing sheets, wherein the suction wheel (1) is arranged above the stack (100) and acts on the respective uppermost sheet (1000) in the stack (100).
EP12191559.9A 2011-12-08 2012-11-07 Eccentric suction wheel Active EP2602218B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011120476A DE102011120476A1 (en) 2011-12-08 2011-12-08 Unround suction wheel

Publications (3)

Publication Number Publication Date
EP2602218A2 EP2602218A2 (en) 2013-06-12
EP2602218A3 EP2602218A3 (en) 2014-07-30
EP2602218B1 true EP2602218B1 (en) 2019-09-11

Family

ID=47191557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12191559.9A Active EP2602218B1 (en) 2011-12-08 2012-11-07 Eccentric suction wheel

Country Status (6)

Country Link
US (1) US8657279B2 (en)
EP (1) EP2602218B1 (en)
JP (1) JP5972160B2 (en)
CN (1) CN103159052B (en)
DE (1) DE102011120476A1 (en)
PT (1) PT2602218T (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130183035A1 (en) * 2011-12-01 2013-07-18 Joseph L. Smith Enhanced PON And Splitter Module And Associated Method
DE102011120475A1 (en) * 2011-12-08 2013-06-13 Heidelberger Druckmaschinen Aktiengesellschaft Sheet feeder with two suction wheels
DE102014012867A1 (en) * 2014-08-29 2016-03-03 Giesecke & Devrient Gmbh Stacking device for stacking value documents
JP6529848B2 (en) * 2015-07-17 2019-06-12 株式会社フジシール Sheet feeding device

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Also Published As

Publication number Publication date
US8657279B2 (en) 2014-02-25
EP2602218A2 (en) 2013-06-12
DE102011120476A1 (en) 2013-06-13
PT2602218T (en) 2019-10-29
CN103159052A (en) 2013-06-19
EP2602218A3 (en) 2014-07-30
CN103159052B (en) 2017-06-16
JP5972160B2 (en) 2016-08-17
JP2013119484A (en) 2013-06-17
US20130147109A1 (en) 2013-06-13

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