EP2053001A1 - 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 PDFInfo
- Publication number
- EP2053001A1 EP2053001A1 EP07020794A EP07020794A EP2053001A1 EP 2053001 A1 EP2053001 A1 EP 2053001A1 EP 07020794 A EP07020794 A EP 07020794A EP 07020794 A EP07020794 A EP 07020794A EP 2053001 A1 EP2053001 A1 EP 2053001A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- stack
- material stack
- gripper
- rollers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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.
- 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 stack of material is in this case not pulled by the gripper, but it depends on the stack between the gripper and the material stack clamping rollers down or it is the stack in this area curved downward. 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 the 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 point between the rollers results between the roller assembly and the gripper a pronounced stacking belly on separation of the individual sheets from each other and thus can get 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 a base is advanced horizontally and the wrapping of the smaller roll results from the positioning of the front end of the 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 is not necessary to provide a movement of the stack of material which, except for the area of the angled 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 base, 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 below the support surface for the stack is located.
- the oblique arrangement of the connecting 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 base 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.
- FIG. 2 shows the stop plate 28 of the open gripper 20 contacted.
- 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 FIG. 5 can be seen, sags slightly 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)
- Discharge By Other Means (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
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
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
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 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, 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 Unterlage und Lösen der Klemmung des Greifers.
- Advancing the block-shaped material stack beyond a base, between a roller arrangement and detecting the material stack in the region of its front end by means of a gripper,
- immediately clamping the stack of material adjacent the gripper between an upper rotatable roller and a lower drivable roller of the roller assembly, the stack of material wrapping the upper roller over a partial circumference, in front of the clamping area of the two rollers,
- 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 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 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 stack of material is in this case not pulled by the gripper, but it depends on the stack between the gripper and the material stack clamping rollers down or it is the stack in this area curved downward. 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 substrate, 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 the 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 point between the rollers results between the roller assembly and the gripper a pronounced stacking belly on separation of the individual sheets from each other and thus can get 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 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 Fördern des Materialstapels in den Bereich zwischen dem geöffneten Walzenpaar,
- eine Einrichtung zum relativ zueinander Zustellen der Walzen,
- einen Antrieb zum Antreiben der unteren Walze in Förderrichtung des Materialstapels,
- einen Greifer zum Halten des Materialstapels im Bereich seines vorderen Endes.
- A pad for receiving the material stack before it breaks up and venting,
- a roller arrangement for clamping the material stack between an upper rotatable roller and a lower drivable roller, means for conveying the material stack into the area between the opened roller pair,
- a device for feeding the rolls relative to one another,
- 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.
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 einer Unterlage aufliegende Materialstapel horizontal vorgeschoben wird und sich die Umschlingung der kleineren Walze durch die Positionierung des vorderen Endes der 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 a base is advanced horizontally and the wrapping of the smaller roll results from the positioning of the front end of the 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 is not necessary to provide a movement of the stack of material which, except for the area of the angled roller arrangement, is made obliquely downwards.
Die geneigte Verbindungsebene ermöglicht es beispielsweise, die untere Walze oben mindestens auf dem Höhenniveau der 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 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 base, 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 below the support surface for the stack is located. Moreover, there is the possibility of an arrangement of bearing surface of the material stack on the substrate in such a way 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 connecting 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 Unterlage durchaus horizontal und/oder vertikal relativ zueinander verfahrbar sein.Moreover, the lower roller and the base 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
gezeigten Vorrichtung zur Veranschaulichung des Aufbrechens und Belüftens des aus Blättern gebildeten Papierstapels.Figur 1
- 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
Die Aufnahmefläche 2 des Tisches 1 ist horizontal angeordnet. Der Tisch 1 ist in Richtung des Doppelpfeils 5 hin und her verfahrbar.
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
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
Ein Drehgeber 19 ermittelt den Drehwinkel und die Drehgeschwindigkeit der oberen Walze 6.A
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
Bezogen auf die in
Ausgehend von dem Zustand gemäß
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
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
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
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
Claims (18)
Priority Applications (5)
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 |
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 |
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 |
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 true EP2053001A1 (en) | 2009-04-29 |
EP2053001B1 EP2053001B1 (en) | 2010-06-02 |
Family
ID=39182867
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) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014111384A1 (en) * | 2014-08-11 | 2016-02-11 | Baumann Maschinenbau Solms Gmbh & Co. Kg | A method of breaking up a stack of sheet material |
GB2546269A (en) * | 2016-01-12 | 2017-07-19 | De La Rue Int Ltd | Separating security document substrates |
Families Citing this family (3)
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 |
US20190127157A1 (en) * | 2017-10-31 | 2019-05-02 | Dyco, Inc. | System and method for forming an article array |
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ATE518794T1 (en) * | 2006-12-08 | 2011-08-15 | Mohr Adolf Maschf | DEVICE FOR BREAKING UP AND VENTING A STACK OF MATERIAL MADE OF LEAVES |
-
2007
- 2007-10-24 AT AT07020794T patent/ATE469852T1/en active
- 2007-10-24 DE DE502007004027T patent/DE502007004027D1/en active Active
- 2007-10-24 EP EP07020794A patent/EP2053001B1/en not_active Not-in-force
-
2008
- 2008-10-17 JP JP2008290359A patent/JP2009102171A/en not_active Withdrawn
- 2008-10-21 US US12/288,470 patent/US20090108520A1/en not_active Abandoned
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DE2641214A1 (en) * | 1975-11-03 | 1977-05-12 | Walter Sticht | Photocopier sheets batch unstacker - loosens tightly packed sheets for manual pick-off or complete batch separation |
EP0021396A1 (en) | 1979-06-29 | 1981-01-07 | International Business Machines Corporation | Apparatus for shingling sheets in a stack |
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 |
JPS60112537A (en) * | 1983-11-21 | 1985-06-19 | Dainippon Ink & Chem Inc | Prevention of blocking for printing paper sheets and apparatus thereof |
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DE102014111384A1 (en) * | 2014-08-11 | 2016-02-11 | Baumann Maschinenbau Solms Gmbh & Co. Kg | A method of breaking up a stack of sheet material |
DE102014111384B4 (en) | 2014-08-11 | 2020-06-25 | Baumann Maschinenbau Solms Gmbh & Co. Kg | Process for breaking up a stack of sheet material |
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GB2546269B (en) * | 2016-01-12 | 2021-04-28 | De La Rue Int Ltd | Separating security document substrates |
Also Published As
Publication number | Publication date |
---|---|
US20090108520A1 (en) | 2009-04-30 |
DE502007004027D1 (en) | 2010-07-15 |
ATE469852T1 (en) | 2010-06-15 |
EP2053001B1 (en) | 2010-06-02 |
JP2009102171A (en) | 2009-05-14 |
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