EP1493670A1 - Verfahren und Vorrichtung zum Entstapeln und Zuführen von Zuschnitten, insbesondere zu einer Verpackungsmaschine - Google Patents

Verfahren und Vorrichtung zum Entstapeln und Zuführen von Zuschnitten, insbesondere zu einer Verpackungsmaschine Download PDF

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Publication number
EP1493670A1
EP1493670A1 EP04101725A EP04101725A EP1493670A1 EP 1493670 A1 EP1493670 A1 EP 1493670A1 EP 04101725 A EP04101725 A EP 04101725A EP 04101725 A EP04101725 A EP 04101725A EP 1493670 A1 EP1493670 A1 EP 1493670A1
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EP
European Patent Office
Prior art keywords
blanks
feed
feeder
magazine
feed hopper
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.)
Withdrawn
Application number
EP04101725A
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English (en)
French (fr)
Inventor
Walter Spada
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.)
SASIB SpA
Original Assignee
SASIB SpA
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 SASIB SpA filed Critical SASIB SpA
Publication of EP1493670A1 publication Critical patent/EP1493670A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
    • B65B43/14—Feeding individual bags or carton blanks from piles or magazines
    • B65B43/16—Feeding individual bags or carton blanks from piles or magazines by grippers
    • B65B43/18—Feeding individual bags or carton blanks from piles or magazines by grippers by suction-operated grippers
    • B65B43/185—Feeding individual bags or carton blanks from piles or magazines by grippers by suction-operated grippers specially adapted for carton blanks

Definitions

  • the invention addresses a blank feeder, particularly to a packaging machine, which blanks are made of cardboard or the like and are fed in stacks, composed of a predetermined number of identical, congruently superimposed blanks, which feeder is composed of a feed magazine and a feed hopper, which forms the extension of the feed magazine, the feed magazine and the feed hopper being oriented with their axes parallel to the feed direction of the blanks, that are oriented downward with respect to the horizontal plane, each of which blanks has at least two oppositely projecting portions, which are designed to lie on lateral slide guides provided within the feed magazine, the feed magazine and/or the feed hopper having a plurality of guides for laterally retaining the blanks and maintaining the alignment thereof.
  • Prior art feeders of the above mentioned type generally have at least one pair of inclined blank supporting guides within the feed magazine, the blanks being fed to the hopper substantially by being slid therein by gravity.
  • This arrangement may have the drawback of an excessive load of blanks on the hopper, which is designed to contain a controlled, substantially constant number of blanks, generally smaller than the number of blanks contained in the feed magazine, which acts as a storage. If the blanks exert an excessive pressure on the hopper, two or more blanks may be undesirably withdrawn, instead of one, by the means for transferring the blanks to other means, which are in turn designed to transfer the blanks to the forming and packing units. It shall be noted that the stack of blanks may have a relatively large size and weight.
  • this invention has the object of obviating the above drawbacks and to provide, by using simple and inexpensive means, a feeder like the one described hereinbefore, wherein such arrangements are provided that the feed hopper is not loaded with an excessive weight of blanks, without requiring too frequent interventions by the operators, and while ensuring a certain hopper loading continuity, which may be further adjusted and calibrated depending on the machine emptying level.
  • the invention fulfils the above objects by providing a feeder such as the one described hereinbefore, wherein the lateral blank slipping or sliding or transporting guides situated in the feed magazine consist of at least two parallel blank conveyor belts, on which the lower edges of the projecting portions lie at least partly.
  • Each of said belts may have, on its outer surface, a plurality of blank retaining and slip preventing projections.
  • means may be provided for synchronously driving the two belts in the feed hopper direction.
  • these retaining projections may consist of a succession of identical, equally spaced teeth, whereas each trough between each pair of adjacent teeth may have a predetermined width, adapted to accommodate at least one, preferably a subset of blanks, composed of a predetermined number of superimposed blanks.
  • the ridge of each of the teeth may have a predetermined width, adapted to accommodate at least one, preferably a subset of blanks, composed of a predetermined number of superimposed blanks.
  • each of the tooth ridges may have a flat surface. Thanks to these arrangements, each subset of blanks lying over each tooth is retained by the subset of blanks immediately downstream therefrom, which gets into the adjacent trough by gravity. Hence, the blanks are retained all along the feed magazine.
  • the means for driving each belt may consist of at least one pair of pulleys, at least one whereof is motor-driven or dynamically connected to a power unit, the belt being returned around said pulleys.
  • the axis of rotation of each pulley of one belt may be coaxial to the axis of rotation of the corresponding pulley of the other belt.
  • each belt may be returned around three pulleys disposed at the vertices of an ideal triangle, particularly a right triangle.
  • a first idler pulley may be placed at the entry of the feed hopper, a second motor-driven pulley may be placed downstream therefrom, with reference to the blank feed direction, and be on the same horizontal plane as the first pulley, whereas a third idler pulley may be placed on the vertical of the second pulley, at a predetermined distance therefrom.
  • the portion of the belt between the first and the third pulley which corresponds to the ideal hypotenuse, is inclined toward the feed hopper parallel to the feed magazine axis and/or to the blank feed direction, and is designed to support the blanks.
  • this arrangement advantageously allows to place the motor and/or the members for transmitting motion from said motor to the motor-driven pulley in a lower position.
  • belt supporting means may be provided for preventing the belt from excessively bending due to the blank weight.
  • These means for preventing bending may be formed by at least one tab or a belt guide provided at the lateral inner edge of the blank support portion of each belt and/or by at least one tab or guide provided at the inner surface of said belt portion.
  • the two motor-driven pulleys may be rotatably driven by a single drive shaft, which is mounted coaxially thereto and is connected to a single drive motor.
  • each of the two belts may also have teeth, on its inner side, for engagement in the corresponding teeth of the outer peripheral surface of at least its respective motor-driven pulley, preferably on the outer peripheral surface of each of the three pulleys. Thanks to this arrangement, any slipping and/or skidding is prevented between each belt and one or more of its respective pulleys.
  • the motor of the two rear motor-driven pulleys may be controlled by fill-up level sensors, which are placed in or associated to the feed hopper. Therefore, the motor may drive the pulleys and the toothed belts to a predetermined amount, such as to maintain a certain constant fill-up level in the feed hopper.
  • Fill-up level sensors may be further provided for the feed magazine, which sensors are connected to means for signaling the need of reloading blanks in such magazine by the operators.
  • the exit of the feed magazine and the entry of the feed hopper may be at a predetermined distance, which is a function of a predetermined number of superimposed blanks.
  • Withdrawing/transferring means may be further provided for withdrawing each first blank at the exit of the feed hopper and for transferring it to means that are designed to convey a succession of blanks to a subsequent folding unit and to a filling unit, contained in the packaging machine.
  • These conveyor means may preferably consist of one or two horizontal belt conveyors, disposed parallel to and at a predetermined distance from each other.
  • the withdrawing means may consist of a swinging suction arm, which withdraws the first blank at the exit of the feed hopper and transfers it by an arcuate motion, on the belt conveyors.
  • the advantages of this invention are self-evident from the above description and consist in that, thanks to the two toothed belts, the blanks are divided within the feed magazine into small partial stacks which are separately held against a spontaneous gravity feed into the feed magazine.
  • the belt feed causes the blanks to reach the end of their stroke, whereby a predetermined number of blanks fall into the hopper.
  • a relatively large amount of blanks may be fed to the magazine, thereby avoiding the need of continuous interventions by the personnel, whereas a small predetermined number of blanks are fed to the hopper. This prevents the hopper from being loaded with an excessive blank weight, and ensures a certain continuity of operation of the machine.
  • a further advantage is that, by laying the blanks alternately at the tooth ridges and onto the troughs between one tooth and the other, a wavy arrangement of blanks is provided, which assists a preliminary blank stack break-up operation. Also, by providing that blanks do not weigh on blanks downstream therefrom facilitates individual separation thereof.
  • this invention has the object of satisfactorily solving the problem of separating the blanks, which may stick together due to the above die cutting operation in stacks, to the presence of electrostatic charges, to painting and/or moisture variations as well as to weight.
  • the invention achieves this additional object by providing that, between the exit of the feed magazine and the entry of the feed hopper, blank subset stack break-up means are provided at the troughs and ridges respectively of the conveyor belts of the feed magazine.
  • stack break-up means may consist of at least one interconnection between the feed magazine and the feed hopper.
  • the feed magazine may have a less steep slope with respect to the horizontal plane and the feed hopper may have a second steeper slope with respect to the horizontal plane.
  • the conveyor belts of the feed magazine may extend along said arcuate interconnection and form themselves the blank stack break-up means.
  • This arcuate interconnection may be generated by two arcuate segments of belts, each extending at its respective return pulley situated between the exit of the feed magazine and the entry of the feed hopper.
  • the blanks are guided along an arcuate path, and the lower edges thereof are held in mutual contact by the belt teeth, in such a manner as to cause them to open out in a fan shape and/or to cause two adjacent blanks to partly slip over each other.
  • the blanks while the blanks are driven along said arcuate portion of the belts, they progressively change their inclination due to the slope difference between the hopper and the magazine, and are simultaneously retained at their lower side, while taking an inclined position as they become slightly offset from each other.
  • a preferred embodiment of a feeder of blanks 1 in a cigarette packaging machine is shown.
  • the blanks 1 are designed to be folded in such a manner as to form a carton to be later filled with a predetermined number of cigarette packs.
  • the present invention may advantageously find application in packaging machines for other products, e.g. foodstuffs.
  • the feeder as shown is the first device of the packaging machine. It consists of a feed magazine 2 and a feed hopper 3, which forms in all respects an extension of the feed magazine 2.
  • the feed magazine 2 and the feed hopper 3 are oriented with their axes parallel to the direction of feed of the blanks 1 and inclined downward with respect to the horizontal plane. Nevertheless, as is apparent from the Figures, the feed magazine 2 has a lower slope than the feed hopper 3, in such a way as to facilitate the breaking up of the stack of blanks 1, as is better explained hereafter.
  • the feed magazine 2 is loaded by an operator with blanks 1, grouped in stacks P, which are composed of a predetermined number of identical and congruently superimposed blanks 1, made of carboard or the like.
  • the shape of the blank 1, as shown in the Figures shall be intended by way of example only and without limitation.
  • the blank 1 has a pair of tabs 101 which project on opposite sides, each of whose lower edges lies on a belt 4 which conveys the blank 1 toward the feed hopper 3.
  • this invention provides two parallel conveyor belts 4, 4' for the blanks 1, which are synchronously driven in the direction of the feed hopper 3.
  • Each of said belts 4, 4' is internally toothed, having a succession of identical, equally spaced teeth 104.
  • the ridges of the teeth 104 are flattened and have a predetermined width, which is substantially equal to the width of each trough 204 between each pair of adjacent teeth 104.
  • each tooth 104 and each trough 204 may accommodate a subset P' of blanks 1 composed of a predetermined number of superimposed blanks 1. This results in an effective retaining and slip preventing effect on blanks 1, even though the latter are disposed in the feed magazine in a wavy arrangement which facilitates breaking up of their stacks.
  • Each belt 4 is driven around 3 pulleys 5, 6 and 7, which are placed at the vertices of an ideal right triangle.
  • the axis of rotation of each return pulley 5, 6 and 7 of a belt 4 is coaxial to the axis of rotation of the corresponding return pulley of the other belt 4'.
  • a first pulley 5 is an idler and is placed at the entry 103 of the feed hopper 3, and more precisely its axis lies substantially along the bisector of the angle region between the intersection axis of the plane that defines the exit 102 of the feed magazine 2 and the plane that defines the entry 103 of the feed pulley 3. As better explained hereafter, the particular location of the two pulleys 5 is critical for breaking up the stacks of blanks 1.
  • a second pulley 6 is placed behind the former, with reference to the direction of feed of the blanks 1, and lies on the same horizontal plane as the first pulley 5.
  • Said second pulley 6 and its corresponding pulley 6 are rotatably driven by a single shaft 10 which is mounted coaxially thereon and is driven by a motor 8, dynamically connected thereto, by using signals from sensors 9 for detecting the fill-up level of the feed hopper 3, which will be described below.
  • Said motor 8 drives the pulleys 6, hence the toothed belts 4, 4' to a predetermined extent, such as to maintain a substantially constant amount of blanks 1 within the hopper 3.
  • a third idler pulley 7 is placed on the vertical of the second pulley 6 and at a predetermined distance therefrom.
  • the portion 304 of the belt 4, 4' between the first pulley 5 and the third pulley 7 is inclined parallel to the axis of the feed magazine 2 and to the direction of feed of the blanks 1 and is designed to support the blanks 1. As shown in the Figures, the inclination of such portion 304 is not excessive and is such as to allow the retention of blanks 1.
  • Each belt 4, 4' has further internal teeth for engagement in corresponding teeth on the outer peripheral surface of each of the three pulleys 5, 6, 7 respectively, in such a manner as to avoid any slipping and/or skidding between the belt 4, 4' and the pulleys 5, 6, 7 and in such a manner as to keep the teeth and the troughs between the two belts 4, 4' in corresponding positions and to allow a synchronous feed thereof.
  • each belt 4, 4' are generated by the wavy regular profile of the belt 4, 4'.
  • a slide guide 11 for the blanks 1 is provided to prevent the belt 4, 4' from excessively bending due to the weight of the blanks 1.
  • the feed magazine 2 is further provided with a pair of lateral guides for retaining and maintaining the alignment of the blanks 1 in the magazine 2.
  • the hopper 3 also has a pair of upper rods 203 and a pair of lower rods 303 which extend toward the exit 102 of the feed magazine 2 parallel to the direction of feed of blanks 1 into the hopper 3, and have the function of laterally retaining and maintaining the alignment of the blanks 1 both inside the hopper 3 and in the angle formed by the plane that defines the entry 103 of the hopper 3 and the plane that defines the exit 102 of the magazine 2.
  • each of the two upper retaining rods 203 extends in an opened apart direction and forms, with the other corresponding rod, a widened lead-in guide to facilitate the introduction of blanks 1 in the hopper 3.
  • the hopper 3 further has a pair of rods 403 for supporting and guiding the sliding blanks 1, which rods are inclined parallel to the direction of feed of the blanks 1 into the hopper 3.
  • the two rods 402 are in such a position that, even inside the hopper 3, the blanks 1 lie on the tabs 101.
  • each of said weight sensors 12 has a circular plate 112, whose axis is oriented parallel to the direction of feed of blanks 1 into the hopper 3. This plate 112 projects into the hopper 3 to a slightly larger extent than the size of the blanks 1, in such a manner as to act as an end-of-stroke and retention abutment for the blanks 1 within the feed hopper 3. The blanks 1 fall against the plates 112 by gravity.
  • the subsets P' of blanks 1 are held at their bottom substantially in contact with one another thanks to the presence of the teeth 104 and troughs 204, whereas they tend to open out in a fan shape at the top, due to the difference of slopes between the hopper 3 and the magazine 2 and tend to slide over one another, thereby causing a stack break up effect.
  • a swinging suction arm 13 Downstream from the exit 503 of the hopper 3, with reference to the direction of feed of the blanks 1, a swinging suction arm 13 is provided which withdraws the first blank 1 at the exit 503 of the hopper 3 and transfers it by an arcuate motion over a pair of horizontal belt conveyors 14, which are disposed in parallel arrangement and at a predetermined distance from each other.
  • the hopper 3 has such a shape that the amplitude of such arcuate motion is not excessive. This shape substantially corresponds to the slope angle between the surface of the blanks 1 contained in the hopper 3 and the blank 1 support surface of the belt conveyors 14.
  • Said belt conveyors 14 successively transfer the blanks 1 to a subsequent folding unit and to a filling unit which are contained in the packaging machine (said units are not shown).
  • This suction arm 13 is pivoted substantially at the lower edge of the exit 503 of the hopper 3, whereas its swinging axis is disposed horizontally and transverse to the direction of feed of the blanks 1.
  • This withdrawing and transferring arm 13 has a comb shape and is provided with a pair of outer parallel branches 113 for supporting each blank 1 as it is transferred and a pair of inner parallel branches, which are disposed at a predetermined distance from each other and have suction heads 413, alternately connected by switching means to a negative pressure source and to ambient pressure, or to an overpressure source, whereby the blank 1 is only retained as it follows the arcuate path to be transferred from the exit 503 of the hopper 3 to the belt conveyors 14.
  • the suction heads 413 are operated when the arm 13 is swung toward the exit 503 of the hopper 3 to withdraw the blank 1 and are idle when the arm 13 is in the horizontal end-of-stroke position, to allow the blank 1 to be transferred to the belt conveyors 14.
  • the two belt conveyors 14 are at an adequate distance from each other to allow the passage of the two suction branches 213 of the withdrawing/transferring arm 13, and the latter has an end of transferring stroke position in which the suction branches 213 release the blank 1 when the latter lies on the conveyors 14.
  • longitudinal apertures 15 are formed between the two conveyors 14, for insertion of the suction branches 213 in such a manner as to be at least slightly below the conveying plane.
  • Each suction head 413 consists of a suction nozzle, which is placed at the center of the convex portion of a conical suction cup, which is designed to adhere against the lower surface of the blank 1. As the blank 1 is released onto the conveyors 14, the suction heads 413 are lowered below the conveying plate for releasing the blank 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Making Paper Articles (AREA)
EP04101725A 2003-07-03 2004-04-26 Verfahren und Vorrichtung zum Entstapeln und Zuführen von Zuschnitten, insbesondere zu einer Verpackungsmaschine Withdrawn EP1493670A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITSV20030030 ITSV20030030A1 (it) 2003-07-03 2003-07-03 Alimentatore di fustellati,in particolare ad una macchina impacchettatrice, metodo di alimentazione e metodo di smazzamento.
ITSV20030030 2003-07-03

Publications (1)

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EP1493670A1 true EP1493670A1 (de) 2005-01-05

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EP04101725A Withdrawn EP1493670A1 (de) 2003-07-03 2004-04-26 Verfahren und Vorrichtung zum Entstapeln und Zuführen von Zuschnitten, insbesondere zu einer Verpackungsmaschine

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EP (1) EP1493670A1 (de)
IT (1) ITSV20030030A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109204975A (zh) * 2018-11-22 2019-01-15 河南中烟工业有限责任公司 卷烟条盒皮自动整平定型收集系统的单张取料结构

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817518A (en) * 1956-01-25 1957-12-24 Gardner Board & Carton Co Blank feeding apparatus
DE1158352B (de) * 1961-01-30 1963-11-28 Rose Brothers Ltd Zufuehrungsvorrichtung fuer Faltschachteln
DE2215981A1 (de) * 1972-04-01 1973-10-11 Hesser Ag Maschf Vorrichtung zum zufuehren von faltschachteln in einer verpackungsmaschine
US3999683A (en) * 1975-02-26 1976-12-28 H. J. Langen & Sons Ltd. Wrap-around carton forming machine
EP0339178A1 (de) * 1988-04-28 1989-11-02 Tokyo Automatic Machinery Works Limited Magazin und Verfahren zum Zuführen von Artikeln
DE4217178A1 (de) * 1992-05-23 1993-11-25 Iwk Verpackungstechnik Gmbh Verfahren und Vorrichtung zur Zuführung von Faltschachteln oder ähnlichem
US5344279A (en) * 1991-09-23 1994-09-06 Lever Brothers Company, Division Of Conopco, Inc. Magazine and process for stacking cartons employing same
US5511772A (en) * 1994-08-25 1996-04-30 Ganz; Robert H. Oscillating rotary hopper
EP1316521A1 (de) * 1996-02-21 2003-06-04 Bell & Howell Postal Systems, Inc. Magazin und Verfahren zum Laden von Dokumenten

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817518A (en) * 1956-01-25 1957-12-24 Gardner Board & Carton Co Blank feeding apparatus
DE1158352B (de) * 1961-01-30 1963-11-28 Rose Brothers Ltd Zufuehrungsvorrichtung fuer Faltschachteln
DE2215981A1 (de) * 1972-04-01 1973-10-11 Hesser Ag Maschf Vorrichtung zum zufuehren von faltschachteln in einer verpackungsmaschine
US3999683A (en) * 1975-02-26 1976-12-28 H. J. Langen & Sons Ltd. Wrap-around carton forming machine
EP0339178A1 (de) * 1988-04-28 1989-11-02 Tokyo Automatic Machinery Works Limited Magazin und Verfahren zum Zuführen von Artikeln
US5344279A (en) * 1991-09-23 1994-09-06 Lever Brothers Company, Division Of Conopco, Inc. Magazine and process for stacking cartons employing same
DE4217178A1 (de) * 1992-05-23 1993-11-25 Iwk Verpackungstechnik Gmbh Verfahren und Vorrichtung zur Zuführung von Faltschachteln oder ähnlichem
US5511772A (en) * 1994-08-25 1996-04-30 Ganz; Robert H. Oscillating rotary hopper
EP1316521A1 (de) * 1996-02-21 2003-06-04 Bell & Howell Postal Systems, Inc. Magazin und Verfahren zum Laden von Dokumenten

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109204975A (zh) * 2018-11-22 2019-01-15 河南中烟工业有限责任公司 卷烟条盒皮自动整平定型收集系统的单张取料结构
CN109204975B (zh) * 2018-11-22 2024-01-09 河南中烟工业有限责任公司 卷烟条盒皮自动整平定型收集系统的单张取料结构

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