EP2053001B1 - Method for loosening a stack of sheets, in particular a paper stack, and device for implementing the method - Google Patents

Method for loosening a stack of sheets, in particular a paper stack, and device for implementing the method Download PDF

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Publication number
EP2053001B1
EP2053001B1 EP07020794A EP07020794A EP2053001B1 EP 2053001 B1 EP2053001 B1 EP 2053001B1 EP 07020794 A EP07020794 A EP 07020794A EP 07020794 A EP07020794 A EP 07020794A EP 2053001 B1 EP2053001 B1 EP 2053001B1
Authority
EP
European Patent Office
Prior art keywords
material stack
stack
roll
gripper
roller
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.)
Not-in-force
Application number
EP07020794A
Other languages
German (de)
French (fr)
Other versions
EP2053001A1 (en
Inventor
Frank Stemmer
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.)
Adolf Mohr Maschinenfabrik GmbH and Co KG
Original Assignee
Adolf Mohr Maschinenfabrik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adolf Mohr Maschinenfabrik GmbH and Co KG filed Critical Adolf Mohr Maschinenfabrik GmbH and Co KG
Priority to AT07020794T priority Critical patent/ATE469852T1/en
Priority to EP07020794A priority patent/EP2053001B1/en
Priority to DE502007004027T priority patent/DE502007004027D1/en
Priority to JP2008290359A priority patent/JP2009102171A/en
Priority to US12/288,470 priority patent/US20090108520A1/en
Publication of EP2053001A1 publication Critical patent/EP2053001A1/en
Application granted granted Critical
Publication of EP2053001B1 publication Critical patent/EP2053001B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/006—Feeding stacks of articles to machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/48—Air blast acting on edges of, or under, articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/60—Loosening articles in piles
    • 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
    • B65H2301/422—Handling piles, sets or stacks of articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5121—Bending, buckling, curling, bringing a curvature
    • B65H2301/51212—Bending, buckling, curling, bringing a curvature perpendicularly to the direction of displacement of handled material, e.g. forming a loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/52—Gripping means reciprocating
    • 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
    • B65H2701/18—Form of handled article or web
    • B65H2701/182—Piled package

Definitions

  • the invention relates to a method for breaking up and aerating a stack of material formed from sheets, in particular a paper stack, and a device for carrying out the method.
  • a method and a device for breaking up and venting a stack of material formed from sheets, in particular a stack of paper is known from US 5,178,237 DE 10 2004 003 455 A1 known.
  • a partial stack of leaved Guts is separated from a total pile and pushed forward over a rotatable guide roller.
  • the front end of the separated material stack is detected by a gripper and pulled obliquely down through a passage formed between two deliverable rollers. The drawing of the material stack through the passage takes place when the rollers are moved apart; Immediately after the pliers have pulled the leading end of the stack of material through the passage, the two rollers are driven towards each other and the stack of material clamped.
  • the gripper pulls the stack of material between the rollers located in the clamping position. Due to the deflection of the material stack in the region of the guide roller results in a break up of the leaves of the material stack, so that air can get between adjacent leaves.
  • the upper or lower roller can be driven, the two rollers having different peripheral speeds.
  • the roller assembly has an upper and a lower roller.
  • the passage gap between the two rollers is kept smaller than the stack thickness.
  • the one roller is at least elastically in the jacket area, in particular rubber-elastic, designed to be compressible, so that it is aligned in the stacking pass.
  • the stack is bent about the rigid roller, the radius of curvature being greater at the stack side remote from that roller than at the stack side adjacent the roller. It therefore occurs during the passage of a longitudinal displacement of the sheets or sheets contained in the stack, wherein the voltage applied to the most-driven, rigid roller blades lag the adjacent to the other roller blades.
  • the rigid, upper roller is drivable.
  • Object of the present invention is to provide a method and apparatus for breaking and venting a material stack formed of sheets, in particular a paper stack, with the / can achieve an optimal Aufbrechtex and the broken vented material stack can be processed optimally.
  • both rollers contact the material stack directly and the lower roller is used to transport the material stack which is clamped between the roller arrangement.
  • the gripper has the task of keeping the front free end of the stack of material getting further and further away from it during the transport of the material stack by means of the roller arrangement.
  • the material stack is not pulled by the gripper, but it hangs between the stack the gripper and the rollers clamping the material stack down through or the stack is curved downwards in this area. This makes it possible to accomplish the bulge of the material stack provided in accordance with the method in this area, with the possibility that air gets between the individual sheets of the material stack.
  • the diameter of the upper roll is smaller than the diameter of the lower roll.
  • the compression effect of the two rollers during clamping and the fact that the material is already there Upper roller is wrapped in front of the clamping region of the two rollers over a partial circumference of the material stack, that the material stack is conveyed in its lower region at a greater speed than the material stack in its upper region.
  • This effect causes the bottom sheets of the material stack to bulge more than the top sheets.
  • the leaves on the outside of the curve travel a greater distance than the leaves on the inside of the curve; the peripheral speed and thus the conveying speed of Leaves thus increases to the outside.
  • the Aufbrechrain is optimized in a surprising manner; due to the shingles of the leaves in the region of the clamping or crushing between the rollers results between the roller assembly and the gripper a pronounced stacking belly when separating the individual sheets from each other and thus can reach sufficient air between the individual sheets.
  • the gripper is moved at a maximum speed corresponding to the peripheral speed of the upper roller.
  • the upper sheet layers especially the uppermost sheet of the material stack, have not yet been pulled, but there is no belly there. Due to the described effects, a belly always forms in this case in the region of the lower sheet layers of the material stack.
  • the gripper is moved at a speed which is lower, in particular slightly lower, than the peripheral speed of the upper roller. The task of the gripper is thus to ensure that the front end is permanently fixed, which accordingly does not hang down freely. Due to the coordinated movement of upper roller and gripper, the material stack does not have to be pulled, but the feed of the material stack is carried out by driving the lower roller.
  • Gripper travel and gripper speed are then selected accordingly. To prevent the paper from being pulled.
  • the means for conveying the material stack in the region between the opened pair of rollers is in particular a gripper.
  • the diameter of the upper roll is smaller than the diameter of the lower roll.
  • the rollers of the roller arrangement can preferably be moved apart only to the extent that the stack of material, still untied, can be conveyed freely between the two rollers. It is therefore not necessary to provide a particularly large opening between the two rollers, which would be suitable for passing by means of a gripper.
  • the stack of material resting on the first base is advanced horizontally and the looping of the smaller roll results from the positioning of the front end of the first base to the upper roll taking into account the thickness of the material stack.
  • the looping of the upper roller should take place over an angle of> 30 °.
  • An angle of wrap of 30 ° to 50 ° is considered advantageous. This angle is sufficient to achieve the positive effect of scaling of the material stack in the region of the clamping or squeezing point.
  • the upper roller is in particular freely rotatable.
  • the lower roller is in particular driven by an electric motor.
  • the lateral surface of the upper roller is particularly hard.
  • the lateral surface of the lower roller is particularly soft. This property of the lateral surfaces is particularly beneficial for the described compression effect.
  • connection plane of the two bearing axes of the two rollers is directed at an angle to the horizontal and the vertical, from the top back down to the front. Because of this oblique arrangement of the connecting plane, the material stack of the roller arrangement can be conveyed substantially horizontally and can also be conveyed away substantially horizontally from the roller arrangement. It does not require a movement to provide the material stack, which, except for the area of the angularly arranged roller arrangement, is made obliquely downwards.
  • the inclined connection plane makes it possible, for example, to arrange the lower roller above at least the height level of the first support, for example a support surface of a table for the material stack, or to arrange it at least at a height level which is at most equal to the dimension of the radius of the lower roller corresponding to below the support surface located for the stack.
  • connection plane has the advantage that the material stack can be conveyed substantially horizontally to the roller arrangement, wherein the desired wrapping is achieved directly in the region of the upper roller.
  • the lower roller and the first pad may well be moved horizontally and / or vertically relative to each other.
  • the device according to the illustrated embodiment for carrying out the method according to the invention has a table 1 with a receiving surface 2 for a paper stack 4 formed from sheets 3.
  • the stack consists of a plurality of sheets, in particular significantly more than 100 sheets.
  • the receiving surface 2 of the table 1 is arranged horizontally.
  • the table 1 is movable in the direction of the double arrow 5 back and forth.
  • FIG. 1 shows the advanced end position
  • FIG. 4 the retracted end position.
  • the apparatus further comprises a small diameter upper roll 6 and a large diameter lower roll 7.
  • the two rollers 6 and 7 are rotatable about horizontal, mutually parallel axes 8 and 9, which are arranged parallel to the front edge 10 of the table.
  • the axle 9 is mounted in a stationary bearing part 11 of the device.
  • a stationary component of the device further forms a pneumatic cylinder 12, the piston rod 13 receives the axis 8 for the roller 6 in the region of its free end.
  • the piston rod 13 is arranged at an angle to the horizontal and to the vertical with respect to the longitudinal center axis thereof.
  • the connecting plane 14, which is perpendicular to the plane of the figure, connects the two axes 8 and 9 and is directed from the top rear down to the front.
  • the connecting plane 14 extends in the exemplary embodiment at an angle of 45 ° to the horizontal, ie 45 ° to the receiving surface 2 of the table first
  • the roller 6 is freely rotatably mounted in the axis 8. Concretely, the electric drive, the electric motor 15, a reduction gear 17 and a movement of the output shaft of the reduction gear 17 on the roller 7 transmitting belt 18 on.
  • a rotary encoder 19 determines the angle of rotation and the rotational speed of the upper roller 6.
  • a gripper 20 in its rearward position, in front of the connecting plane 14, is arranged.
  • This gripper 20 can be moved horizontally back and forth in the direction of the double arrow 21.
  • the clamping surface 22 of the pliers lower part 23 and the receiving surface 2 of the table 1, which forms the base for the paper stack 4, are at the same height level.
  • the pliers upper part 24 is vertically displaceable by means of a pneumatic drive in the direction of the double arrow 26.
  • the clamping surface of the tong upper part 24 is designated by the reference numeral 27.
  • the pliers lower part 23 is formed angularly and has a front, vertically aligned stop plate 28.
  • the lower roller 7 is disposed immediately under a thickness-tapered portion 29 of the table 1 in the front position.
  • the pneumatic cylinder 12 is driven so that the piston rod 13 is retracted, thus a relatively large passage 30 between the two rollers 6 and 7 and also between the Upper roller 6 and the receiving surface 2 of the table 1 is formed.
  • the maximum clearance height is slightly larger than the maximum stacking height.
  • a cuboid paper stack 4 for example, a partial stack, which is separated from a total stack in a conventional manner, placed on the table 1 and advanced by means not illustrated in detail funding, such as a paper stack 4 rear grab gripper 35, to reach the maximum advanced position in which the paper stack 4, which is still cuboid, the stop plate 28 of the open gripper 20 contacted. This is shown in FIG.
  • the gripper 20 is transferred into its gripping position, that is, the pliers upper part 24 moves against the paper stack 4, so that the paper stack 4 is clamped between the pliers lower part 23 and the pliers upper part 24.
  • the gripper 35 is opened and moved back. This condition is in FIG. 3 illustrated.
  • the table 1 in the in FIG. 4 retracted shown end position. This results in a relatively wide gap between the front edge 10 of the table 1 and the gripper 20. Specifically, the distance of the table 1 corresponds in its retracted end position of the upper roller 6 about twice the stack thickness. It is then the pneumatic cylinder 12 is activated and the piston rod 13 extended.
  • the roller 6 contacts the upper sheet 3 of the paper stack 4 and clamps the paper stack 4 between the roller 6 and the roller 7.
  • the paper stack 4 wraps around the upper roller 6 over a partial circumference, in particular, before the clamping region of the two rollers 6 and 7 an angle> 30 ° .
  • the outer surface 31 of the upper roller 6 with the relatively small diameter is formed hard.
  • the upper roller 6 relatively strongly compresses the paper stack 4 in the region of its upper leaves 3.
  • the upper roller 6 thus forms the paper stack 6 in this area according to its radius.
  • the lower roller 7 with the relatively large diameter has a lateral surface 32 which is relatively soft. As a result, this roller 7 is pressed only relatively little into the paper stack 4 in the region of the lower one Leaves 3 on.
  • the conveying path of the upper roller 6 and its rotational speed is detected by means of the rotary encoder 19, which is connected via a controller with the means not shown for horizontal movement of the gripper 20 in connection.
  • the gripper 20 is moved forward by means which are not shown, although the travel distance and travel speed of the gripper are coordinated with respect to the kinematics of the roller 6. This is to the effect that the gripper 20 only holds the front end of the paper stack 4, but not pull.
  • Gripper travel and gripper speed are preferably to be selected so that the upper sheet 3 of the paper stack 4, as it can be seen from Figure 5, slightly sags down and from there the belly 33 increasingly forms down.
  • the driven roller 7 conveys the paper stack 4 until it leaves the clamping area between the two rollers 6 and 7 with its rear end. At this time, the paper stack 4 is held above a pad 34 only by the gripper 20. The gripper 20 moves a little further and pulls the paper stack 4 completely on the pad 34, is then opened and puts the paper stack 4 on the pad 34 from.
  • the pad 34 forms in particular part of a vibrating table which is otherwise not illustrated in detail. This pad can, as shown, be arranged horizontally or already positioned, as usual in the vibrating table, inclined.
  • the broken and ventilated cuboid paper stack 4 can be supplied to the side rulers of the vibrating table to store the paper stack on the table of the vibrating table and to shake in a corner of the vibrating table, for the purpose of absolutely edge-exact alignment of the paper stack 4, thus the formation of the Paper stack 4 as an exact block.
  • the gripper 20 Under this aspect is under cuboid paper stack, as long as it is gripped by the gripper 20 to understand a design of the stack, which differs slightly from the exact cuboid, with the need to align the stack exactly as a cuboid, for subsequent processing operations, in particular subsequent cutting or stamping processes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pile Receivers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Discharge By Other Means (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

The method involves directly clamping a cuboidal material stack (4) e.g. paper stack, adjacent to a gripper between an upper rotatable roller (6) and a lower drivable roller (7) of a roller arrangement. The material stack is fed by driving of the lower roller for holding the stack between the gripper and the rollers, where diameter of the upper roller is smaller than that of the lower roller. The stack conveyed by the lower roller from a clamping region of the rollers is deposited on a support (34) by the gripper, and clamping of the gripper is released. An independent claim is also included for a device for executing a method of force-opening and ventilating a sheet material stack.

Description

Die Erfindung betrifft ein Verfahren zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels, insbesondere eines Papierstapels, sowie eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for breaking up and aerating a stack of material formed from sheets, in particular a paper stack, and a device for carrying out the method.

Ein Verfahren und eine Vorrichtung zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels, insbesondere eines Papierstapels, ist aus der DE 10 2004 003 455 A1 bekannt. Dort wird ein Teilstapel blättrigen Guts von einem Gesamtstapel abgetrennt und vorne über eine drehbare Führungswalze hinausgeschoben. Dort wird das vordere Ende des abgetrennten Materialstapels mittels eines Greifers erfasst und schräg nach unten durch einen Durchgang gezogen, der zwischen zwei zustellbaren Walzen gebildet ist. Das Ziehen des Materialstapels durch den Durchgang erfolgt bei auseinandergefahrenen Walzen; unmittelbar nachdem die Zange das vordere Ende des Materialstapels durch den Durchgang gezogen hat werden die beiden Walzen aufeinanderzu gefahren und der Materialstapel geklemmt. Der Greifer zieht den Materialstapel zwischen den in Klemmstellung befindlichen Walzen durch. Aufgrund der Umlenkung des Materialstapels im Bereich der Führungswalze ergibt sich ein Aufbrechen der Blätter des Materialstapels, womit Luft zwischen benachbarte Blätter gelangen kann. Zusätzlich zu dem Ziehen des Materialstapels mittels des Greifers kann die obere oder die untere Walze angetrieben werden, wobei die beiden Walzen unterschiedliche Umfangsgeschwindigkeiten aufweisen.A method and a device for breaking up and venting a stack of material formed from sheets, in particular a stack of paper, is known from US 5,178,237 DE 10 2004 003 455 A1 known. There, a partial stack of leaved Guts is separated from a total pile and pushed forward over a rotatable guide roller. There, the front end of the separated material stack is detected by a gripper and pulled obliquely down through a passage formed between two deliverable rollers. The drawing of the material stack through the passage takes place when the rollers are moved apart; Immediately after the pliers have pulled the leading end of the stack of material through the passage, the two rollers are driven towards each other and the stack of material clamped. The gripper pulls the stack of material between the rollers located in the clamping position. Due to the deflection of the material stack in the region of the guide roller results in a break up of the leaves of the material stack, so that air can get between adjacent leaves. In addition to pulling the stack of material by means of the gripper, the upper or lower roller can be driven, the two rollers having different peripheral speeds.

Nachteilig ist bei diesem Verfahren, dass der Materialstapel zu dessen Aufbrechen mittels der Zange gezogen werden muss. Hierdurch lassen sich nur unzureichende Ergebnisse bezüglich der Relativverschiebung der einzelnen Blätter zueinander, ferner des Ausbauchens des Materialstapels und damit bezüglich der Möglichkeit, dass Luft zwischen die einzelnen Blätter gelangt, erzielen. Abgesehen hiervon ist auch das Aufbrechergebnis aufgrund des Ziehens des Materialstapels unter einem Winkel nach unten durch den Durchgang und damit das Fördern des Materialstapels zwischen den beiden diesen klemmenden Walzen von Nachteil, weil sich nur eine unzureichende Umschlingung der Walzen ergibt, die für ein vorteilhaftes Ergebnis beim Aufbrechen von Bedeutung ist.The disadvantage of this method is that the material stack must be pulled to its breaking by means of the pliers. As a result, only inadequate results with respect to the relative displacement of the individual sheets to each other, also the bulging of the material stack and thus with respect to the possibility that air passes between the individual sheets, achieve. Apart from this, the Aufbrechergebnis due to the pulling of the material stack at an angle down through the passage and thus the conveying of the material stack between the two these clamping rollers of disadvantage, because there is only an insufficient wrap of the rollers, which is an advantageous result Breaking up is important.

Weitere Verfahren zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels sind aus der DE 32 19 693 A1 und der EP 0 021 396 A1 bekannt. Dort findet allerdings kein Greifer zum Erfassen des Materialstapels Verwendung sondern es erfolgt das Fördern der Blattlagen mittels eines Förderbandes, das entweder mit einem anderen Förderband oder einer Walze auf der abgewandten Seite des Stapels zusammenwirkt. Da der Materialstapel vor dem Aufbrechen nicht von einem Greifer erfasst wird, lässt sich eine Positionsveränderung der einzelnen Blätter des Materialstapels im Bereich einer Stapelseite während des Aufbrechens des Stapels nicht verhindern. Insofern zeichnen sich die in diesen Schriften beschriebenen Verfahren nicht nur durch ein unzureichendes Aufbrechergebnis aus, sondern es sind auch Nachteile betreffend den Folgeprozess des Rüttelns des belüfteten Materialstapels zu verzeichnen.Further methods for breaking up and aerating a stack of material formed from sheets are known from DE 32 19 693 A1 and the EP 0 021 396 A1 known. However, there is no gripper for detecting the material stack use but there is the conveying of the sheet layers by means of a conveyor belt, which cooperates either with another conveyor belt or a roller on the opposite side of the stack. Since the material stack is not detected by a gripper before breaking, a change in the position of the individual sheets of the material stack in the region of a stack side during the breaking of the stack can not be prevented. In this respect, the methods described in these documents are characterized not only by an insufficient Aufbrechergebnis, but there are also disadvantages regarding the subsequent process of shaking the ventilated material stack to record.

Ein weiteres Verfahren sowie eine hierauf Bezug nehmende Vorrichtung zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels ist in der DE 26 41 214 A1 beschrieben. Dort ist das Fördern eines Stapels zwischen einer Walzenanordnung beschrieben, wobei ein Aufbrechen und Belüften des Stapels zwischen der Walzenanordnung stattfindet. Im Einzelnen weist die Walzenanordnung eine obere und eine untere Walze auf. Der Durchlassspalt zwischen den beiden Walzen ist kleiner als die Stapeldicke gehalten. Die eine Walze ist zumindest im Mantelbereich elastisch, insbesondere gummielastisch, zusammendrückbar ausgebildet, so dass sie sich beim Stapeldurchlauf einbuchtet. Beim Durchlauf des Stapels durch die Walzenanordnung wird der Stapel um die steife Walze gebogen, wobei der Krümmungsradius an der von dieser Walze abweisenden Stapelseite größer ist als an der an der Walze anliegenden Stapelseite. Es tritt daher beim Durchlauf eine Längsverschiebung der im Stapel enthaltenen Folien bzw. Blätter auf, wobei die an der meist angetriebenen, steifen Walze anliegenden Blätter den an der anderen Walze anliegenden Blätter nacheilen. Bei der beschriebenen Vorrichtung ist die steife, obere Walze antreibbar.A further method, as well as a device for breaking up and aerating a stack of material formed from sheets, is disclosed in US Pat DE 26 41 214 A1 described. There, the conveying of a stack between a roller assembly is described, wherein a breaking and venting of the stack takes place between the roller assembly. In particular, the roller assembly has an upper and a lower roller. The passage gap between the two rollers is kept smaller than the stack thickness. The one roller is at least elastically in the jacket area, in particular rubber-elastic, designed to be compressible, so that it is aligned in the stacking pass. As the stack passes through the roller assembly, the stack is bent about the rigid roller, the radius of curvature being greater at the stack side remote from that roller than at the stack side adjacent the roller. It therefore occurs during the passage of a longitudinal displacement of the sheets or sheets contained in the stack, wherein the voltage applied to the most-driven, rigid roller blades lag the adjacent to the other roller blades. In the described device, the rigid, upper roller is drivable.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren und eine Vorrichtung zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels, insbesondere eines Papierstapels anzugeben, mit dem/der sich ein optimales Aufbrechergebnis erreichen lässt und der aufgebrochene belüftete Materialstapel optimal weiter verarbeitet werden kann.Object of the present invention is to provide a method and apparatus for breaking and venting a material stack formed of sheets, in particular a paper stack, with the / can achieve an optimal Aufbrechergebnis and the broken vented material stack can be processed optimally.

Die Erfindung schlägt ein Verfahren zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels, insbesondere eines Papierstapels, mit folgenden Merkmalen vor:

  • Vorschieben des quaderförmigen Materialstapels über eine erste Unterlage hinaus, zwischen einer Walzenanordnung hindurch und Erfassen des Materialstapels im Bereich seines vorderen Endes mittels eines Greifers,
  • unmittelbares Klemmen des Materialstapels benachbart dem Greifer zwischen einer oberen drehbaren Walze und einer unteren antreibbaren Walze der Walzenanordnung, wobei der Materialstapel die obere Walze, in Schieberichtung des Materialstapels (4) vor dem Klemmbereich der beiden Walzen, über einen Teilumfang umschlingt,
  • Vorschieben des Materialstapels durch Antreiben der unteren Walze bei gleichzeitigem Verfahren des Greifers, zum Halten des Materialstapels zwischen dem Greifer und den den Materialstapel klemmenden Walzen,
  • Ablegen des mittels der unteren Walze aus dem Klemmbereich der Walze geförderten Materialstapels mittels des Greifers auf einer zweiten Unterlage und Lösen der Klemmung des Greifers.
The invention proposes a method for breaking up and venting a stack of material formed from sheets, in particular a paper stack, with the following features:
  • Advancing the cuboid material stack beyond a first support, between a roller assembly and detecting the material stack in the region of its front end by means of a gripper,
  • immediately clamping the stack of material adjacent to the gripper between an upper rotatable roller and a lower drivable roller of the roller assembly, wherein the stack of materials wraps around the upper roller, in the sliding direction of the material stack (4) in front of the clamping region of the two rollers, over a partial circumference,
  • Advancing the material stack by driving the lower roller while moving the gripper, holding the stack of material between the gripper and the rollers clamping the material stack,
  • Depositing the material stack conveyed by means of the lower roller from the clamping region of the roller by means of the gripper on a second support and releasing the clamping of the gripper.

Wesentlich ist bei dem erfindungsgemäßen Verfahren, dass beide Walzen den Materialstapel unmittelbar kontaktieren und die untere Walze dem Transport des Materialstapels, der zwischen der Walzenanordnung geklemmt ist, dient.
Dem Greifer kommt die Aufgabe zu, das vordere freie Ende des Materialstapels, das sich während des Transportes des Materialstapels mittels der Walzenanordnung immer weiter von dieser entfernt, zu halten. Der Materialstapel wird hierbei vom Greifer nicht gezogen, sondern es hängt der Stapel zwischen dem Greifer und den den Materialstapel klemmenden Walzen nach unten durch bzw. es ist der Stapel in diesem Bereich nach unten gewölbt. Dies ermöglicht, die verfahrensgemäß vorgesehene Ausbuchtung des Materialstapels in diesem Bereich zu bewerkstelligen, mit der Möglichkeit, dass Luft zwischen die einzelnen Blätter des Materialstapels gelangt. Um die Belüftung des Materialstapels in diesem Bereich zu verbessern, kann zusätzlich Blasluft seitlich zwischen die voneinander getrennten Blätter des Materialstapels eingeblasen werden. Während des Aufbrechens des Materialstapels fixiert der Greifer das vordere Ende des Materialstapels. Demzufolge ist der Materialstapel in diesem Bereich dauerhaft fixiert, womit sich die einzelnen Blattlagen dort nicht zueinander verschieben können. Nach dem Aufbrechen und Belüften kann der Materialstapel somit in Quaderform auf der zweiten Unterlage abgelegt werden, beispielsweise einem Rütteltisch. Mittels des Rütteltisches ist es dann nur erforderlich, den vor dem Aufbrechen und Belüften im Wesentlichen quaderförmig vorliegenden Materialstapel dann exakt als Quader auszurichten, indem in eine Ecke des Seitenlineale aufweisenden Rütteltisches gerüttelt wird.It is essential in the method according to the invention that both rollers contact the material stack directly and the lower roller is used to transport the material stack which is clamped between the roller arrangement.
The gripper has the task of keeping the front free end of the stack of material getting further and further away from it during the transport of the material stack by means of the roller arrangement. The material stack is not pulled by the gripper, but it hangs between the stack the gripper and the rollers clamping the material stack down through or the stack is curved downwards in this area. This makes it possible to accomplish the bulge of the material stack provided in accordance with the method in this area, with the possibility that air gets between the individual sheets of the material stack. In order to improve the ventilation of the material stack in this area, additional blowing air can be injected laterally between the separated sheets of the material stack. During the breaking up of the material stack, the gripper fixes the front end of the material stack. Consequently, the material stack is permanently fixed in this area, whereby the individual sheet layers can not move there to each other. After breaking up and aerating the material stack can thus be stored in cuboid on the second surface, such as a vibrating table. By means of the vibrating table, it is then only necessary to align the stack of material substantially cuboidal presently before the breaking up and aeration, then exactly as a cuboid, by shaking in a corner of the side ruler having vibrating table.

Vorzugsweise ist der Durchmesser der oberen Walze kleiner als der Durchmesser der unteren Walze.Preferably, the diameter of the upper roll is smaller than the diameter of the lower roll.

Da der mittels des Greifers im Bereich des vorderen Endes erfasste Materialstapel dort mit im Wesentlichen ebener Stirnkante vorliegt und sich in diesem Bereich des Greifers die Blätter des Materialstapels nicht zueinander verschieben können, bewirkt bereits der Kompressionseffekt der beiden Walzen beim Klemmen und die Tatsache, dass die obere Walze vor dem Klemmbereich der beiden Walzen über einen Teilumfang vom Materialstapel umschlungen wird, dass der Materialstapel in seinem unteren Bereich mit einer größeren Geschwindigkeit gefördert wird, als der Materialstapel in seinem oberen Bereich.
Dieser Effekt führt dazu, dass die unteren Blätter des Materialstapels stärker ausbauchen als die oberen Blätter. Bezogen auf die obere Walze legen somit die kurvenäußeren Blätter einen größeren Weg zurück als die kurveninneren Blätter; die Umfangsgeschwindigkeit und damit die Fördergeschwindigkeit der Blätter nimmt somit nach außen zu. Deswegen gleiten die einzelnen Blätter voneinander ab. Ein weiterer Effekt, der für ein optimales Aufbrechen des Materialstapels wesentlich ist, ist bei einer im Durchmesser kleineren oberen Walze darin zu sehen, dass die Förderkräfte über die unter Walze mit dem großen Durchmesser in den Materialstapel eingeleitet werden. Wird die untere Walze angetrieben und lässt man die obere Walze passiv mitdrehen, wird die jeweils höher liegende Papierschicht aufgrund des bestehenden Schlupfes weniger stark mitgenommen.Since the material stack detected by means of the gripper in the region of the front end is present there with a substantially planar front edge and the leaves of the material stack can not move relative to one another in this region of the gripper, the compression effect of the two rollers during clamping and the fact that the material is already there Upper roller is wrapped in front of the clamping region of the two rollers over a partial circumference of the material stack, that the material stack is conveyed in its lower region at a greater speed than the material stack in its upper region.
This effect causes the bottom sheets of the material stack to bulge more than the top sheets. Relative to the top roller, the leaves on the outside of the curve travel a greater distance than the leaves on the inside of the curve; the peripheral speed and thus the conveying speed of Leaves thus increases to the outside. Because of this, the individual leaves slide off each other. Another effect, which is essential for an optimal breaking of the material stack, is to be seen in a smaller diameter upper roller in that the conveying forces are introduced into the material stack via the large-diameter roller. If the lower roller is driven and the upper roller is passively rotated, the higher paper layer is taken along less strongly due to the existing slip.

Durch die beschriebenen Effekte wird in überraschender Art und Weise das Aufbrechergebnis optimiert; aufgrund der Verschuppung der Blätter im Bereich der Klemm- bzw. Quetschstelle zwischen den Walzen ergibt sich zwischen der Walzenanordnung und dem Greifer ein ausgeprägter Stapelbauch bei Trennung der einzelnen Blätter voneinander und damit kann ausreichend Luft zwischen die einzelnen Blätter gelangen.By the effects described, the Aufbrechergebnis is optimized in a surprising manner; due to the shingles of the leaves in the region of the clamping or crushing between the rollers results between the roller assembly and the gripper a pronounced stacking belly when separating the individual sheets from each other and thus can reach sufficient air between the individual sheets.

Der Greifer wird maximal mit einer Geschwindigkeit verfahren, die der Umfangsgeschwindigkeit der oberen Walze entspricht. In diesem Fall werden die oberen Blattlagen, insbesondere das oberste Blatt des Materialstapels, noch nicht gezogen, es bildet sich allerdings dort auch kein Bauch. Aufgrund der beschriebenen Effekte bildet sich in diesem Fall im Bereich der unteren Blattlagen des Materialstapels in jedem Fall ein Bauch. Um sicherzustellen, dass der Greifer den Materialstapel nicht zieht, wird es aber als vorteilhaft angesehen, wenn der Greifer mit einer Geschwindigkeit verfahren wird, die geringer, insbesondere geringfügig geringer ist als die Umfangsgeschwindigkeit der oberen Walze.
Dem Greifer kommt damit die Aufgabe zu, sicherzustellen, dass das vordere Ende dauerhaft fixiert ist, das demnach nicht frei nach unten hängt. Durch die abgestimmte Bewegung von oberer Walze und Greifer muss der Materialstapel nicht gezogen werden, sondern der Vorschub des Materialstapels erfolgt durch Antreiben der unteren Walze.The gripper is moved at a maximum speed corresponding to the peripheral speed of the upper roller. In this case, the upper sheet layers, especially the uppermost sheet of the material stack, have not yet been pulled, but there is no belly there. Due to the described effects, a belly always forms in this case in the region of the lower sheet layers of the material stack. To ensure that the gripper does not pull the stack of material, however, it is considered advantageous if the gripper is moved at a speed which is lower, in particular slightly lower, than the peripheral speed of the upper roller.
The task of the gripper is thus to ensure that the front end is permanently fixed, which accordingly does not hang down freely. Due to the coordinated movement of upper roller and gripper, the material stack does not have to be pulled, but the feed of the material stack is carried out by driving the lower roller.

Zum Abstimmen der Umfangsgeschwindigkeit der oberen Walze und der Verfahrgeschwindigkeit des Greifers wirkt mit der oberen Walze insbesondere ein Drehgeber zusammen, der die Förderstrecke und die Fördergeschwindigkeit der oberen Walze und damit des an dieser anliegenden oberen Blattes des Materialstapels erfasst und über eine Steuerung Verfahrmittel des Greifers ansteuert. Greiferfahrweg und Greifergeschwindigkeit werden dann entsprechend gewählt. Verhindert werden soll, dass das Papier gezogen wird.To tune the peripheral speed of the upper roller and the travel speed of the gripper cooperates with the upper roller, in particular a rotary encoder, which detects the conveying path and the conveying speed of the upper roller and thus of this adjacent upper sheet of the material stack and controls via a control traversing means of the gripper , Gripper travel and gripper speed are then selected accordingly. To prevent the paper from being pulled.

Die Erfindung schlägt ferner eine Vorrichtung zur Durchführung des Verfahrens mit folgenden Merkmalen vor:

  • Eine erste Unterlage zur Aufnahme des Materialstapels vor dessen Aufbrechen und Belüften,
  • eine Walzenanordnung zum Klemmen des Materialstapels zwischen einer oberen drehbaren Walze und einer unteren antreibbaren Walze,
  • Mittel zum schiebenden Fördern des Materialstapels in den Bereich zwischen dem geöffneten Walzenpaar,
  • eine Einrichtung zum relativ zueinander Zustellen der Walzen, so dass der Materialstapel die obere Walze, vor dem Klemmbereich der beiden Walzen, über einen Teilumfang umschlingt,
  • einen Antrieb zum Antreiben der unteren Walze in Förderrichtung des Materialstapels,
  • einen Greifer zum Halten des Materialstapels im Bereich seines vorderen Endes,
  • wobei mittels des Greifers der aufgebrochene und belüftete Materialstapel auf einer zweiten Unterlage ablegbar ist.
The invention further proposes an apparatus for carrying out the method with the following features:
  • A first pad for receiving the material stack before it breaks up and venting,
  • a roller assembly for clamping the stack of material between an upper rotatable roller and a lower drivable roller,
  • Means for pushing the material stack into the area between the opened pair of rollers,
  • a device for feeding the rolls relative to one another, so that the stack of materials wraps around the upper roll, over a partial circumference, in front of the clamping region of the two rolls,
  • a drive for driving the lower roller in the conveying direction of the material stack,
  • a gripper for holding the stack of material in the region of its front end,
  • wherein by means of the gripper, the broken and ventilated material stack can be deposited on a second base.

Bei dem Mittel zum Fördern des Materialstapels in dem Bereich zwischen dem geöffneten Walzenpaar handelt es sich insbesondere um einen Greifer.The means for conveying the material stack in the region between the opened pair of rollers is in particular a gripper.

Vorzugsweise ist der Durchmesser der oberen Walze kleiner als der Durchmesser der unteren Walze.Preferably, the diameter of the upper roll is smaller than the diameter of the lower roll.

Die Walzen der Walzenanordnung lassen sich vorzugsweise nur soweit auseinanderfahren, dass der Materialstapel, noch ungeklemmt, frei zwischen die beiden Walzen gefördert werden kann. Es ist somit nicht erforderlich, eine besonders große Öffnung zwischen den beiden Walzen vorzusehen, die für ein Hindurchfahren mittels eines Greifers geeignet wäre.The rollers of the roller arrangement can preferably be moved apart only to the extent that the stack of material, still untied, can be conveyed freely between the two rollers. It is therefore not necessary to provide a particularly large opening between the two rollers, which would be suitable for passing by means of a gripper.

Gemäß einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass der auf der ersten Unterlage aufliegende Materialstapel horizontal vorgeschoben wird und sich die Umschlingung der kleineren Walze durch die Positionierung des vorderen Endes der ersten Unterlage zur oberen Walze unter Berücksichtigung der Dicke des Materialstapels ergibt.According to an advantageous embodiment of the invention, it is provided that the stack of material resting on the first base is advanced horizontally and the looping of the smaller roll results from the positioning of the front end of the first base to the upper roll taking into account the thickness of the material stack.

Die Umschlingung der oberen Walze sollte über einen Winkel von > 30° erfolgen. Als vorteilhaft wird ein Umschlingungswinkel von 30° bis 50° angesehen.
Dieser Winkel ist ausreichend, um den positiven Effekt der Schuppung des Materialstapels im Bereich der Klemm- bzw. Quetschstelle zu erzielen.The looping of the upper roller should take place over an angle of> 30 °. An angle of wrap of 30 ° to 50 ° is considered advantageous.
This angle is sufficient to achieve the positive effect of scaling of the material stack in the region of the clamping or squeezing point.

Die obere Walze ist insbesondere frei drehbar. Die untere Walze ist insbesondere elektromotorisch antreibbar.The upper roller is in particular freely rotatable. The lower roller is in particular driven by an electric motor.

Die Mantelfläche der oberen Walze ist insbesondere hart. Die Mantelfläche der unteren Walze ist insbesondere weich. Diese Eigenschaft der Mantelflächen kommt insbesondere dem beschriebenen Kompressionseffekt zugute.The lateral surface of the upper roller is particularly hard. The lateral surface of the lower roller is particularly soft. This property of the lateral surfaces is particularly beneficial for the described compression effect.

Gemäß einer bedeutsamen Weiterbildung der erfindungsgemäßen Vorrichtung ist vorgesehen, dass die Verbindungsebene der beiden Lagerachsen der beiden Walzen unter einem Winkel zur Horizontalen und zur Vertikalen, von oben hinten nach unten vorne gerichtet ist. Aufgrund dieser schrägen Anordnung der Verbindungsebene kann der Materialstapel der Walzenanordnung im Wesentlichen horizontal zugefördert und auch im Wesentlichen horizontal von der Walzenanordnung weggefördert werden. Es ist nicht erforderlich, eine Bewegung des Materialstapels vorzusehen, die, abgesehen von dem Bereich der unter dem Winkel angeordneten Walzenanordnung, schräg nach unten erfolgt.According to a significant development of the device according to the invention it is provided that the connection plane of the two bearing axes of the two rollers is directed at an angle to the horizontal and the vertical, from the top back down to the front. Because of this oblique arrangement of the connecting plane, the material stack of the roller arrangement can be conveyed substantially horizontally and can also be conveyed away substantially horizontally from the roller arrangement. It does not require a movement to provide the material stack, which, except for the area of the angularly arranged roller arrangement, is made obliquely downwards.

Die geneigte Verbindungsebene ermöglicht es beispielsweise, die untere Walze oben mindestens auf dem Höhenniveau der ersten Unterlage, beispielsweise einer Auflagefläche eines Tisches für den Materialstapel anzuordnen oder oben mindestens auf einem Höhenniveau anzuordnen, das sich maximal dem Maß des Radius der unteren Walze entsprechend unterhalb der Auflagefläche für den Stapel befindet. Überdies besteht die Möglichkeit einer Anordnung von Auflagefläche des Materialstapels auf der ersten Unterlage dahingehend, dass diese Auflagefläche und die Verbindungsebene der beiden Walzen, bei zwischen den Walzen geklemmtem Stapel, sich zwischen den Walzen schneidet.The inclined connection plane makes it possible, for example, to arrange the lower roller above at least the height level of the first support, for example a support surface of a table for the material stack, or to arrange it at least at a height level which is at most equal to the dimension of the radius of the lower roller corresponding to below the support surface located for the stack. Moreover, there is the possibility of an arrangement of bearing surface of the stack of material on the first pad in that this bearing surface and the connecting plane of the two rolls, with stack clamped between the rolls, intersects between the rolls.

Die schräge Anordnung der Verbindungsebene hat den Vorteil, dass der Materialstapel im Wesentlichen horizontal der Walzenanordnung zugefördert werden kann, wobei unmittelbar im Bereich der oberen Walze deren gewünschte Umschlingung erreicht wird.The oblique arrangement of the connection plane has the advantage that the material stack can be conveyed substantially horizontally to the roller arrangement, wherein the desired wrapping is achieved directly in the region of the upper roller.

Überdies können die untere Walze und die erste Unterlage durchaus horizontal und/oder vertikal relativ zueinander verfahrbar sein.Moreover, the lower roller and the first pad may well be moved horizontally and / or vertically relative to each other.

Weitere Merkmale der Erfindung sind in den Unteransprüchen, der Beschreibung der Figuren und den Figuren selbst dargestellt, wobei bemerkt wird, dass alle Einzelmerkmale und alle Kombinationen von Einzelmerkmalen weitere erfinderische Ausgestaltungen darstellen.Further features of the invention are set forth in the subclaims, the description of the figures and the figures themselves, wherein it is noted that all individual features and all combinations of individual features represent further inventive embodiments.

Das erfindungsgemäße Verfahren und eine Ausführungsform einer Vorrichtung zum Aufbrechen und Belüften eines aus Blättern gebildeten Materialstapels ist unter Hinweis auf die Zeichnungen nachfolgend näher erläutert. Es zeigt:

  • Figur 1 eine Seitenansicht der Vorrichtung,
  • Figuren 2 bis 5 Verfahrensabläufe der in Figur 1 gezeigten Vorrichtung zur Veranschaulichung des Aufbrechens und Belüftens des aus Blättern gebildeten Papierstapels.
The method according to the invention and an embodiment of a device for breaking up and venting a stack of material formed from sheets is explained in more detail below with reference to the drawings. It shows:
  • FIG. 1 a side view of the device,
  • FIGS. 2 to 5 Procedures of in FIG. 1 shown device for illustrating the breaking and venting of the paper stack formed from sheets.

Die Vorrichtung gemäß der veranschaulichten Ausführungsform zur Durchführung des erfindungsgemäßen Verfahrens weist einen Tisch 1 mit einer Aufnahmefläche 2 für einen aus Blättern 3 gebildeten Papierstapel 4 auf. Aus zeichnerischen Gründen sind nur einige Blätter 3 veranschaulicht, in der Realität besteht der Stapel aus einer Vielzahl von Blättern, insbesondere deutlich mehr als 100 Blättern.The device according to the illustrated embodiment for carrying out the method according to the invention has a table 1 with a receiving surface 2 for a paper stack 4 formed from sheets 3. For illustrative reasons, only a few sheets 3 are illustrated, in reality the stack consists of a plurality of sheets, in particular significantly more than 100 sheets.

Die Aufnahmefläche 2 des Tisches 1 ist horizontal angeordnet. Der Tisch 1 ist in Richtung des Doppelpfeils 5 hin und her verfahrbar. Figur 1 zeigt die vorgefahrene Endstellung, Figur 4 die zurückgefahrene Endstellung.The receiving surface 2 of the table 1 is arranged horizontally. The table 1 is movable in the direction of the double arrow 5 back and forth. FIG. 1 shows the advanced end position, FIG. 4 the retracted end position.

Die Vorrichtung weist ferner eine obere Walze 6 mit kleinem Durchmesser und eine untere Walze 7 mit großem Durchmesser auf. Die beiden Walzen 6 und 7 sind um horizontale, parallel zueinander verlaufende Achsen 8 und 9 drehbar, die parallel zur Vorderkante 10 des Tisches angeordnet sind. Die Achse 9 ist in einem stationären Lagerteil 11 der Vorrichtung gelagert. Stationärer Bestandteil der Vorrichtung bildet ferner ein Pneumatikzylinder 12, dessen Kolbenstange 13 im Bereich seines freien Endes die Achse 8 für die Walze 6 aufnimmt. Die Kolbenstange 13 ist bezogen auf deren Längsmittelachse unter einem Winkel zur Horizontalen und zur Vertikalen angeordnet. Die Verbindungsebene 14, die senkrecht zur Blattebene der Figur verläuft, verbindet die beiden Achsen 8 und 9 und ist von oben hinten nach unten vorne gerichtet. Die Verbindungsebene 14 verläuft im Ausführungsbeispiel unter einem Winkel von 45° zur Horizontalen, d. h. 45° zur Aufnahmefläche 2 des Tisches 1.The apparatus further comprises a small diameter upper roll 6 and a large diameter lower roll 7. The two rollers 6 and 7 are rotatable about horizontal, mutually parallel axes 8 and 9, which are arranged parallel to the front edge 10 of the table. The axle 9 is mounted in a stationary bearing part 11 of the device. A stationary component of the device further forms a pneumatic cylinder 12, the piston rod 13 receives the axis 8 for the roller 6 in the region of its free end. The piston rod 13 is arranged at an angle to the horizontal and to the vertical with respect to the longitudinal center axis thereof. The connecting plane 14, which is perpendicular to the plane of the figure, connects the two axes 8 and 9 and is directed from the top rear down to the front. The connecting plane 14 extends in the exemplary embodiment at an angle of 45 ° to the horizontal, ie 45 ° to the receiving surface 2 of the table first

Die Walze 6 ist frei drehbar in der Achse 8 gelagert. Die Walze 7 ist mittels eines Elektromotors 15 antreibbar, in Richtung des Pfeils 16. Konkret weist der Elektroantrieb den Elektromotor 15, ein Untersetzungsgetriebe 17 und einen die Bewegung der Ausgangswelle des Untersetzungsgetriebes 17 auf die Walze 7 übertragenden Riemen 18 auf.The roller 6 is freely rotatably mounted in the axis 8. Concretely, the electric drive, the electric motor 15, a reduction gear 17 and a movement of the output shaft of the reduction gear 17 on the roller 7 transmitting belt 18 on.

Ein Drehgeber 19 ermittelt den Drehwinkel und die Drehgeschwindigkeit der oberen Walze 6.A rotary encoder 19 determines the angle of rotation and the rotational speed of the upper roller 6.

In der vorderen Stellung des Tisches 1 ist benachbart zu diesem ein Greifer 20 in dessen hinterer Stellung, vor der Verbindungsebene 14, angeordnet. Dieser Greifer 20 lässt sich in Richtung des Doppelpfeils 21 horizontal hin und her verfahren. Die Klemmfläche 22 des Zangenunterteils 23 und die Aufnahmefläche 2 des Tisches 1, die die Unterlage für den Papierstapel 4 bildet, befinden sich auf demselben Höhenniveau. Das Zangenoberteil 24 ist mittels eines pneumatischen Antriebs in Richtung des Doppelpfeils 26 vertikal verfahrbar. Die Klemmfläche des Zangenoberteils 24 ist mit der Bezugsziffer 27 bezeichnet. Das Zangenunterteil 23 ist winkelförmig ausgebildet und weist eine vordere, vertikal ausgerichtete Anschlagplatte 28 auf.In the front position of the table 1 adjacent to this, a gripper 20 in its rearward position, in front of the connecting plane 14, is arranged. This gripper 20 can be moved horizontally back and forth in the direction of the double arrow 21. The clamping surface 22 of the pliers lower part 23 and the receiving surface 2 of the table 1, which forms the base for the paper stack 4, are at the same height level. The pliers upper part 24 is vertically displaceable by means of a pneumatic drive in the direction of the double arrow 26. The clamping surface of the tong upper part 24 is designated by the reference numeral 27. The pliers lower part 23 is formed angularly and has a front, vertically aligned stop plate 28.

Bezogen auf die in Figur 1 gezeigte Ausgangsstellung ist die untere Walze 7 unmittelbar unter einem in der Dicke verjüngten Abschnitt 29 des in vorderer Stellung befindlichen Tisches 1 angeordnet. Der Pneumatikzylinder 12 ist so angesteuert, dass die Kolbenstange 13 eingefahren ist, somit ein relativ großer Durchgang 30 zwischen den beiden Walzen 6 und 7 und auch zwischen der oberen Walze 6 und der Aufnahmefläche 2 des Tisches 1 gebildet ist. Die maximale Durchgangshöhe ist etwas größer als die maximale Stapelhöhe.Related to the in FIG. 1 As shown, the lower roller 7 is disposed immediately under a thickness-tapered portion 29 of the table 1 in the front position. The pneumatic cylinder 12 is driven so that the piston rod 13 is retracted, thus a relatively large passage 30 between the two rollers 6 and 7 and also between the Upper roller 6 and the receiving surface 2 of the table 1 is formed. The maximum clearance height is slightly larger than the maximum stacking height.

Ausgehend von dem Zustand gemäß Figur 1 wird ein quaderförmiger Papierstapel 4, beispielsweise ein Teilstapel, der von einem Gesamtstapel in üblicher Art und Weise getrennt wird, auf den Tisch 1 aufgelegt und mittels nicht näher veranschaulichter Fördermittel, beispielsweise eines den Papierstapel 4 hinten ergreifenden Greifers 35 vorgeschoben, bis zum Erreichen der maximal vorgeschobenen Stellung, in der der Papierstapel 4, der nach wie vor quaderförmig ist, die Anschlagplatte 28 des geöffneten Greifers 20 kontaktiert. Dies ist in Figur 2 gezeigt.Based on the state according to FIG. 1 is a cuboid paper stack 4, for example, a partial stack, which is separated from a total stack in a conventional manner, placed on the table 1 and advanced by means not illustrated in detail funding, such as a paper stack 4 rear grab gripper 35, to reach the maximum advanced position in which the paper stack 4, which is still cuboid, the stop plate 28 of the open gripper 20 contacted. This is shown in FIG.

Anschließend wird der Greifer 20 in seine Greifstellung überführt, d. h. das Zangenoberteil 24 gegen den Papierstapel 4 bewegt, so dass der Papierstapel 4 zwischen dem Zangenunterteil 23 und dem Zangenoberteil 24 geklemmt ist. Der Greifer 35 wird geöffnet und zurück verfahren. Dieser Zustand ist in Figur 3 veranschaulicht. Dann wird der Tisch 1 in die in Figur 4 gezeigte Endstellung zurückgefahren. Hierdurch ergibt sich ein relativ breiter Spalt zwischen der Vorderkante 10 des Tisches 1 und dem Greifer 20. Konkret entspricht der Abstand des Tisches 1 in seiner zurückgefahrenen Endstellung von der oberen Walze 6 etwa der doppelten Stapelstärke. Es wird dann der Pneumatikzylinder 12 aktiviert und die Kolbenstange 13 ausgefahren. Die Walze 6 kontaktiert das obere Blatt 3 des Papierstapels 4 und klemmt den Papierstapel 4 zwischen der Walze 6 und der Walze 7. Der Papierstapel 4 umschlingt hierbei, vor dem Klemmbereich der beiden Walzen 6 und 7, die obere Walze 6 über einen Teilumfang, insbesondere einen Winkel > 30°.Die Mantelfläche 31 der oberen Walze 6 mit dem relativ geringen Durchmesser ist hart ausgebildet. Demzufolge komprimiert die obere Walze 6 relativ stark den Papierstapel 4 im Bereich seiner oberen Blätter 3. Die obere Walze 6 formt somit den Papierstapel 6 in diesem Bereich entsprechend ihrem Radius. Die untere Walze 7 mit dem relativ großen Durchmesser weist eine Mantelfläche 32 auf, die relativ weich ist. Demzufolge drückt sich diese Walze 7 nur relativ wenig in den Papierstapel 4 im Bereich der unteren Blätter 3 ein. Ist der Papierstapel 4 mittels der beiden Walzen 6 und 7 geklemmt, wird die untere Walze 7 mittels des Elektromotors 15 im Sinne des Pfeils 16 gemäß Figur 5 angetrieben und damit der Papierstapel 4 zum Greifer 20 hin vom Tisch 1 abgefördert. Aufgrund des unterschiedlichen Kompressionseffektes werden die Blätter 3 im unteren Bereich des Papierstapels 4 schneller bewegt als die Blätter 3 im oberen Bereich des Papierstapels 4. Dieser Effekt wird durch die Einleitung der Förderkraft in den unteren Bereich des Papierstapels 4 mittels der unteren Walze 7 verstärkt. Schließlich, und dies ergibt sich durch Vergleich der Figur 5 zu den Figuren 1 bis 4, ist der auf dem Tisch 1 aufliegende Bereich des Papierstapels 4 geschuppt ausgebildet. Diese Schuppung resultiert aus den unterschiedlichen Fördergeschwindigkeiten der Blätter des Papierstapels 4. Blätter, die näher zur Achse 8 der Walze 6 angeordnet sind, müssen einen kürzeren Weg zurücklegen als Blätter, die weiter entfernt von der Achse 8 angeordnet sind.Subsequently, the gripper 20 is transferred into its gripping position, that is, the pliers upper part 24 moves against the paper stack 4, so that the paper stack 4 is clamped between the pliers lower part 23 and the pliers upper part 24. The gripper 35 is opened and moved back. This condition is in FIG. 3 illustrated. Then the table 1 in the in FIG. 4 retracted shown end position. This results in a relatively wide gap between the front edge 10 of the table 1 and the gripper 20. Specifically, the distance of the table 1 corresponds in its retracted end position of the upper roller 6 about twice the stack thickness. It is then the pneumatic cylinder 12 is activated and the piston rod 13 extended. The roller 6 contacts the upper sheet 3 of the paper stack 4 and clamps the paper stack 4 between the roller 6 and the roller 7. The paper stack 4 wraps around the upper roller 6 over a partial circumference, in particular, before the clamping region of the two rollers 6 and 7 an angle> 30 ° .The outer surface 31 of the upper roller 6 with the relatively small diameter is formed hard. As a result, the upper roller 6 relatively strongly compresses the paper stack 4 in the region of its upper leaves 3. The upper roller 6 thus forms the paper stack 6 in this area according to its radius. The lower roller 7 with the relatively large diameter has a lateral surface 32 which is relatively soft. As a result, this roller 7 is pressed only relatively little into the paper stack 4 in the region of the lower one Leaves 3 on. Is the paper stack 4 clamped by means of the two rollers 6 and 7, the lower roller 7 by means of the electric motor 15 in the direction of the arrow 16 in accordance FIG. 5 driven and thus the paper stack 4 conveyed away from the table 1 to the gripper 20. Due to the different compression effect, the sheets 3 are moved faster in the lower region of the paper stack 4 than the sheets 3 in the upper region of the paper stack 4. This effect is enhanced by the introduction of the conveying force in the lower region of the paper stack 4 by means of the lower roller 7. Finally, and this is by comparing the FIG. 5 to the FIGS. 1 to 4 , the resting on the table 1 area of the paper stack 4 is formed scaly. This scaling results from the different conveying speeds of the sheets of the paper stack 4. Leaves, which are arranged closer to the axis 8 of the roller 6, have to travel a shorter distance than leaves, which are arranged further away from the axis 8.

Aufgrund der vorstehend beschriebenen Gegebenheiten bildet sich beim Fördern des Blattstapels 4 mittels der angetriebenen Walze 7 eine nach unten ausgebauchte Gestaltung des Papierstapels 4 vor der Walze 7. Ersichtlich ist in Figur 5 der nach unten stark verformte Bauch 33, mit den dort gezeigten einzelnen, voneinander gelösten Blättern 3. Zwischen diese kann nun Luft gelangen. Es besteht durchaus die Möglichkeit, seitlich des Papierstapels 4, in dem Bereich, in dem der Bauch 33 sich bildet, Luftdüsen anzuordnen und zusätzlich Blasluft seitlich in den Papierstapel 4 einzublasen.Due to the circumstances described above forms when conveying the sheet stack 4 by means of the driven roller 7 a down-bulging design of the paper stack 4 in front of the roller 7. It is apparent in FIG. 5 the downwardly greatly deformed abdomen 33, with the individual, detached leaves 3 there shown. Between these air can now reach. It is quite possible to arrange air nozzles on the side of the paper stack 4, in the region in which the belly 33 forms, and additionally to blow in blown air laterally into the paper stack 4.

Die Förderstrecke der oberen Walze 6 und deren Drehgeschwindigkeit wird mittels des Drehgebers 19 erfasst, der über eine Steuerung mit den nicht gezeigten Mitteln zum horizontalen Verfahren des Greifers 20 in Verbindung steht. So wird der Greifer 20 dann, wenn der Papierstapel 1 mittels der angetriebenen Walze 7 nach vorne geschoben wird, über nicht dargestellte Mittel mit nach vorne verfahren, wobei allerdings die Verfahrstrecke und Verfahrgeschwindigkeit des Greifers bezüglich der Kinematik der Walze 6 abgestimmt ist. Dies dahingehend, dass der Greifer 20 das vordere Ende des Papierstapels 4 nur festhält, nicht aber zieht. Greiferfahrweg und Greifergeschwindigkeit sind vorzugsweise so zu wählen, dass das obere Blatt 3 des Papierstapels 4, wie es der Figur 5 zu entnehmen ist, geringfügig nach unten durchhängt und sich von dort der Bauch 33 immer stärker nach unten ausbildet.The conveying path of the upper roller 6 and its rotational speed is detected by means of the rotary encoder 19, which is connected via a controller with the means not shown for horizontal movement of the gripper 20 in connection. Thus, when the paper stack 1 is pushed forward by means of the driven roller 7, the gripper 20 is moved forward by means which are not shown, although the travel distance and travel speed of the gripper are coordinated with respect to the kinematics of the roller 6. This is to the effect that the gripper 20 only holds the front end of the paper stack 4, but not pull. Gripper travel and gripper speed are preferably to be selected so that the upper sheet 3 of the paper stack 4, as it can be seen from Figure 5, slightly sags down and from there the belly 33 increasingly forms down.

Die angetriebene Walze 7 fördert den Papierstapel 4, bis er mit seinem hinteren Ende den Klemmbereich zwischen den beiden Walzen 6 und 7 verlässt. Zu diesem Zeitpunkt ist der Papierstapel 4 nur mittels des Greifers 20 oberhalb einer Unterlage 34 gehalten. Der Greifer 20 verfährt etwas weiter und zieht den Papierstapel 4 vollständig auf die Unterlage 34, wird dann geöffnet und legt den Papierstapel 4 auf der Unterlage 34 ab. Die Unterlage 34 bildet insbesondere Bestandteil eines sonst nicht näher veranschaulichten Rütteltisches. Diese Unterlage kann, wie gezeigt, horizontal angeordnet sein oder bereits, wie beim Rütteltisch üblich, geneigt positioniert sein. Mittels des Greifers 20 kann somit der aufgebrochene und belüftete quaderförmige Papierstapel 4 den Seitenlinealen des Rütteltisches zugeführt werden, um den Papierstapel auf dem Tisch des Rütteltisches abzulegen und in eine Ecke des Rütteltisches zu rütteln, zwecks absolut kantengenauer Ausrichtung des Papierstapels 4, somit der Ausbildung des Papierstapels 4 als exakter Quader. Unter diesem Aspekt ist unter quaderförmigem Papierstapel, solange er vom Greifer 20 ergriffen wird, eine Gestaltung des Stapels zu verstehen, die geringfügig vom exakten Quader abweicht, mit dem Erfordernis, den Stapel exakt als Quader auszurichten, für nachfolgende Bearbeitungsvorgänge, insbesondere nachfolgende Schneid- oder Stanzprozesse. The driven roller 7 conveys the paper stack 4 until it leaves the clamping area between the two rollers 6 and 7 with its rear end. At this time, the paper stack 4 is held above a pad 34 only by the gripper 20. The gripper 20 moves a little further and pulls the paper stack 4 completely on the pad 34, is then opened and puts the paper stack 4 on the pad 34 from. The pad 34 forms in particular part of a vibrating table which is otherwise not illustrated in detail. This pad can, as shown, be arranged horizontally or already positioned, as usual in the vibrating table, inclined. By means of the gripper 20 thus the broken and ventilated cuboid paper stack 4 can be supplied to the side rulers of the vibrating table to store the paper stack on the table of the vibrating table and to shake in a corner of the vibrating table, for the purpose of absolutely edge-exact alignment of the paper stack 4, thus the formation of the Paper stack 4 as an exact block. Under this aspect is under cuboid paper stack, as long as it is gripped by the gripper 20 to understand a design of the stack, which differs slightly from the exact cuboid, with the need to align the stack exactly as a cuboid, for subsequent processing operations, in particular subsequent cutting or stamping processes.

Claims (18)

  1. Method for breaking open and ventilating a material stack (4) which is formed from sheets (3), in particular a paper stack, having the following features:
    - advancing of the parallelepiped-shaped material stack (4) beyond a first support (1), between a roll arrangement (6, 7) and gripping of the material stack (4) in the region of its front end by means of a gripper (20),
    - direct clamping of the material stack (4) adjacently to the gripper (20) between an upper rotatable roll (6) and a lower drivable roll (7) of the roll arrangement (6, 7), the material stack (4) wrapping around a part circumference of the upper roll (6), in front of the clamping region of the two rolls (6, 7) in the pushing direction of the material stack (4),
    - advancing of the material stack (4) by driving of the lower roll (7) with simultaneous movement of the gripper (20), in order to hold the material stack (4) between the gripper (20) and the rolls (6, 7) which clamp the material stack (4),
    - depositing of the material stack (4), which is conveyed by means of the lower roll (7) out of the clamping region of the rolls (6, 7), on a second support (34) by means of the gripper (20) and release of the clamping action of the gripper (20).
  2. Method according to Claim 1, the diameter of the upper roll (6) being smaller than the diameter of the lower roll (7).
  3. Method according to Claim 1 or 2, the material stack (4) which lies on the first support (1) being advanced horizontally and the wraparound of the upper roll (6) resulting from the positioning of the said support (1) with respect to the upper roll (6), with the thickness of the material stack (4) being taken into consideration.
  4. Method according to one of Claims 1 to 3, the material stack (4) enclosing the upper roll (6), in front of the clamping region of the two rolls (6, 7), over an angle of > 30°, in particular an angle of from 30° to 50°.
  5. Method according to one of Claims 1 to 4, the circumferential speed of the upper roll (6) and the movement speed of the gripper (20) being coordinated.
  6. Method according to Claim 5, the gripper (20) being moved at a speed which is lower, in particular slightly lower, than the circumferential speed of the upper roll (6).
  7. Method according to one of Claims 1 to 6, the material stack (4) being moved substantially horizontally, apart from its deflection in the region of the roll arrangement (6, 7).
  8. Method according to one of Claims 1 to 7, air being blown in between the individual sheets (3) of the material stack (4), from the side of the material stack (4), in that fanned-out region of the material stack (4) which is situated in front of the lower roll (7).
  9. Apparatus for carrying out the method according to one of Claims 1 to 8 having the following features:
    - a first support (1) for receiving the material stack (4) before it is broken open and ventilated,
    - a roll arrangement (6, 7) for clamping the material stack (4) between an upper rotatable roll (6) and a lower drivable roll (7),
    - means (35) for conveying the material stack (4) by sliding into the region between the open roll pair (6, 7),
    - a device (12) for setting the rolls (6, 7) relative to one another, with the result that the material stack (4) wraps around a part circumference of the upper roll (6), in front of the clamping region of the two rolls (6, 7),
    - a drive (15) for driving the lower roll (7) in the conveying direction of the material stack (4),
    - a gripper (20) for holding the material stack (4) in the region of its front end,
    - it being possible for the broken-open and ventilated material stack (4) to be deposited on a second support (34) by means of the gripper (20).
  10. Apparatus according to Claim 9, the diameter of the upper roll (6) being smaller than the diameter of the lower roll (7).
  11. Apparatus according to Claim 9 or 10, the means (35) for conveying the material stack (4) into the region between the open roll pair (6, 7) being configured as a gripper (35).
  12. Apparatus according to one of Claims 9 to 11, the upper roll (6) being mounted such that it can rotate freely.
  13. Apparatus according to one of Claims 9 to 12, it being possible for the lower roll (7) to be driven by electric motor.
  14. Apparatus according to one of Claims 9 to 13, the circumferential face (31) of the upper roll (6) being hard.
  15. Apparatus according to one of Claims 9 to 14, the circumferential face (32) of the lower roll (7) being soft.
  16. Apparatus according to one of Claims 9 to 15, the connecting plane (14) of the two bearing axes (8, 9) of the two rolls (6, 7) being directed from the rear at the top to the front at the bottom at an angle with respect to the horizontal and with respect to the vertical, in particular at an angle with respect to the horizontal of from 40° to 50°.
  17. Apparatus according to one of Claims 9 to 16, a rotary encoder (15) for detecting the rotary angle and/or the rotational velocity of the upper roll (6) interacting with the upper roll (6).
  18. Apparatus according to Claim 17, the rotary encoder (19) interacting via a controller with a drive for moving the gripper (20).
EP07020794A 2007-10-24 2007-10-24 Method for loosening a stack of sheets, in particular a paper stack, and device for implementing the method Not-in-force EP2053001B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT07020794T ATE469852T1 (en) 2007-10-24 2007-10-24 METHOD FOR LOOSENING A STACK MADE OF LEAVES, IN PARTICULAR A STACK OF PAPER, AND DEVICE FOR IMPLEMENTING THE METHOD
EP07020794A EP2053001B1 (en) 2007-10-24 2007-10-24 Method for loosening a stack of sheets, in particular a paper stack, and device for implementing the method
DE502007004027T DE502007004027D1 (en) 2007-10-24 2007-10-24 Method for loosening a stack formed from sheets, in particular a paper stack, and device for carrying out the method
JP2008290359A JP2009102171A (en) 2007-10-24 2008-10-17 Method of loosening a material stack of thin pieces for ventilation and device for implementing the method
US12/288,470 US20090108520A1 (en) 2007-10-24 2008-10-21 Apparatus and method for breaking open and aerating sheet material stacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07020794A EP2053001B1 (en) 2007-10-24 2007-10-24 Method for loosening a stack of sheets, in particular a paper stack, and device for implementing the method

Publications (2)

Publication Number Publication Date
EP2053001A1 EP2053001A1 (en) 2009-04-29
EP2053001B1 true EP2053001B1 (en) 2010-06-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07020794A Not-in-force EP2053001B1 (en) 2007-10-24 2007-10-24 Method for loosening a stack of sheets, in particular a paper stack, and device for implementing the method

Country Status (5)

Country Link
US (1) US20090108520A1 (en)
EP (1) EP2053001B1 (en)
JP (1) JP2009102171A (en)
AT (1) ATE469852T1 (en)
DE (1) DE502007004027D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE518794T1 (en) * 2006-12-08 2011-08-15 Mohr Adolf Maschf DEVICE FOR BREAKING UP AND VENTING A STACK OF MATERIAL MADE OF LEAVES
SE538951C2 (en) * 2014-03-28 2017-02-28 Yaskawa Nordic Ab gripdon
DE102014111384B4 (en) * 2014-08-11 2020-06-25 Baumann Maschinenbau Solms Gmbh & Co. Kg Process for breaking up a stack of sheet material
GB2546269B (en) * 2016-01-12 2021-04-28 De La Rue Int Ltd Separating security document substrates
US20190127157A1 (en) * 2017-10-31 2019-05-02 Dyco, Inc. System and method for forming an article array

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Publication number Priority date Publication date Assignee Title
AT342630B (en) * 1975-11-03 1978-04-10 Sticht Walter DEVICE FOR RELEASING A PACK OF FOIL OR SHEETS
DE2849949A1 (en) * 1978-11-17 1980-05-29 Womako Masch Konstr DEVICE FOR DIVIDING A PACK OF PAPERS
JPS567846A (en) 1979-06-29 1981-01-27 Ibm Separator for stackklike sheet
DE3219693A1 (en) 1982-05-26 1983-12-01 Fa. Heinrich Baumann, 6000 Frankfurt Device for forming processable partial piles from film sheets, in particular paper sheets
JPH0244737B2 (en) * 1983-11-21 1990-10-05 Dainippon Ink & Chemicals INSATSUSHINOBUROTSUKINGUBOSHISOCHIOYOBIHOHO
DE3933626C1 (en) * 1989-10-07 1991-03-14 Wolfgang 6238 Hofheim De Mohr
DE3938530A1 (en) * 1989-11-21 1990-08-02 Spiegelmacher Kurt Dipl Ing Separator for stacked textile patterns - has stack stretched over curved support, with layers loosened and separated for subsequent processing
US5288065A (en) * 1992-03-06 1994-02-22 De La Rue Giori S.A. Method for separating sheets of paper stacked in reams and device for implementing this method
US5893204A (en) * 1996-11-12 1999-04-13 Dresser Industries, Inc. Production process for casting steel-bodied bits
DE19523699A1 (en) * 1995-06-29 1997-01-09 Will E C H Gmbh & Co Device for removing air pockets from paper stacks
US6193231B1 (en) * 1999-02-05 2001-02-27 Stepper, Inc. Universal metering hopper and method for handling thick or thin newspaper products
JP3839310B2 (en) * 2001-11-29 2006-11-01 独立行政法人 国立印刷局 Method and apparatus for spreading sheets
EP1443006B2 (en) * 2003-01-29 2011-06-29 Baumann Maschinenbau Solms GmbH & Co. KG Method and device for force-opening and ventilating of a pile of sheets, in particular a pile of paper sheets
ATE518794T1 (en) * 2006-12-08 2011-08-15 Mohr Adolf Maschf DEVICE FOR BREAKING UP AND VENTING A STACK OF MATERIAL MADE OF LEAVES

Also Published As

Publication number Publication date
EP2053001A1 (en) 2009-04-29
US20090108520A1 (en) 2009-04-30
ATE469852T1 (en) 2010-06-15
JP2009102171A (en) 2009-05-14
DE502007004027D1 (en) 2010-07-15

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