EP3747809A1 - Dispositif et procédé pour alimenter des flans dans une machine de transformation ultérieure - Google Patents

Dispositif et procédé pour alimenter des flans dans une machine de transformation ultérieure Download PDF

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Publication number
EP3747809A1
EP3747809A1 EP20177980.8A EP20177980A EP3747809A1 EP 3747809 A1 EP3747809 A1 EP 3747809A1 EP 20177980 A EP20177980 A EP 20177980A EP 3747809 A1 EP3747809 A1 EP 3747809A1
Authority
EP
European Patent Office
Prior art keywords
blanks
stack
aligning
belt
feed
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
Application number
EP20177980.8A
Other languages
German (de)
English (en)
Other versions
EP3747809B1 (fr
Inventor
Fabrizio FAZZIOLI
Giuseppe SPARACINO
Stefano Villa
Massimo Fortini
Luca Federici
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.)
GD SpA
Original Assignee
GD 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 GD SpA filed Critical GD SpA
Publication of EP3747809A1 publication Critical patent/EP3747809A1/fr
Application granted granted Critical
Publication of EP3747809B1 publication Critical patent/EP3747809B1/fr
Active 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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/02—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge
    • B65H1/025—Supports or magazines for piles from which articles are to be separated adapted to support articles on edge with controlled positively-acting mechanical devices for advancing the pile to present the articles to the separating device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/24—Irregularities, e.g. in orientation or skewness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/20—Acceleration or deceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard

Definitions

  • This invention relates to a device and a method for feeding blanks to a machine for further processing.
  • the invention addresses the field of the processing of blanks - for example (but not necessarily) of paper - for example in the sector of the production of packets, where blanks of rigid or semi-rigid material are folded and welded or glued to form packets for containing articles.
  • the context of this invention is the production of packets of rod-shaped articles such as cigarettes or the like.
  • the prior art teaches feeding blanks in a stack where the blanks, which are planar shaped, are superposed on each other to define a succession of blanks whose large surfaces are in mutual contact.
  • the stack of blanks is fed to a guide channel where the stack is progressively advanced so that the blank at the end of it in the outfeed direction is presented to a pickup device which transfers it for further processing, such as, for example, folding processes.
  • the stack may be inserted in an inclined or vertical guide channel along which it is pushed by gravity or it may be urged towards the pickup device by suitable pushing elements, such as elastic elements, for example.
  • suitable pushing elements such as elastic elements, for example.
  • the height of the stack is reduced, making it necessary to top up with more blanks, usually by periodically adding a bundle of new blanks.
  • the axial thrust applied by the stack of blanks - under its own weight, for example - creates a tendency to produce unwanted curvatures ("bulges") in the stack itself, especially in the blanks at the leading end of the stack, directed towards the pickup device.
  • the curvature is all the more accentuated in the case of blanks made of recycled cardboard, whose fibres are oriented in random directions, thus reducing the flexural rigidity of the blanks, or in the case of blanks having one surface that is stiffer than the one opposite to it (for example, blanks with labels pre-applied on them.
  • This invention therefore has for an aim to provide a device and a method for feeding blanks to a machine for further processing and capable of attaining high standards of process reliability.
  • the numeral 1 in the accompanying drawings denotes in its entirety a device for feeding blanks 100 to a machine for further processing.
  • the expression "machine for further processing” is used to mean a generic machine (not illustrated because it is of known type) configured to receive single blanks one after the other in succession and to subject them to further processes, such as, for example: folding, gluing, printing, application of additional elements (such as stamps, coupons, labels or generic stickers) or even to transfer the blanks to storage units.
  • a machine might be a cigarette packing machine and the device 1 configured to feed the cardboard blanks intended to make hinge-lid packets.
  • the device 1 comprises feed means 2 for feeding a stack P of blanks 100 disposed in succession in a superposed configuration, for example defining a feed space for feeding the stack P of blanks 100 along a feed direction A.
  • the feed direction A is horizontal and the blanks 100 of the stack P can be pushed towards an outfeed section 3 by a generic mechanical pushing element (not illustrated), for example elastic, adapted to generate a force F directed towards the outfeed section 3.
  • the blanks 100 are positioned in a vertical or substantially vertical plane.
  • the feed direction A may be inclined at an angle to the horizontal plane, preferably an acute angle between 1° and 30°. In such a case, the stack P of blanks 100 is pushed towards the outfeed section 3 at least partly by gravity.
  • the feed means 2 comprise at least a fixed bottom wall 12 delimiting at least part of a bottom side of the feed space.
  • a transfer device 200 of known type
  • stop elements 4 may differ in number and/or location, provided always that they perform the same function of controlling the release of the end blank 100 to be picked up by the transfer device 200.
  • At least one stop element 4a for blocking the feed movement of the stack P and positioned preferably in such a way as to intercept and block a lower part of the stack P, hence located at a position such that it is positioned upstream (or on the leading edge) of the end blank 100 along the trajectory of the transfer device 200.
  • the stop element 4a may be fixed.
  • an additional stop element (not illustrated), preferably fixed, positioned in such a way as to intercept and block an upper part of the stack P.
  • the feed means 2 also comprise at least one compensating belt 6 having an upper section 7 running parallel to the feed direction A of the stack P of blanks 100 and defining a bottom support of a predefined portion of the stack of blanks 100 so that the predefined portion of the stack P rests, preferably rests exclusively on, the upper section 7 of the compensating belt 6.
  • the "predefined portion" of the stack P refers to the part of the stack P positioned on top of the upper section 7 of the compensating belt 6 and whose length, along the feed direction A, is constant over time.
  • the operating section 7 of the compensating belt 6 has a length L of between 20 and 40 cm (for example, 27 cm) along the feed direction A and/or ends at a distance d of between 10 and 15 cm (for example, 13 cm) from the end blank 100.
  • the upper section 7 of the compensating belt 6 is raised above the fixed bottom wall 12, so that the blanks 100 are not in sliding contact with the bottom wall 12 as they advance and are not therefore slowed by friction with the bottom wall 12.
  • the operating section 7 of the compensating belt 6 lies in a plane (horizontal in the embodiment shown in the accompanying drawings but in any case preferably parallel to the bottom wall 12) is preferably at a height between 0.2 and 2 mm (for example, 0.5 mm) above the bottom wall 12.
  • the compensating belt 6 is a suction belt connected to a source of pneumatic suction (not illustrated).
  • the compensating belt 6 is provided with a plurality of through holes 8 configured to transmit the pneumatic suction and disposed along a feed direction A of the belt 6.
  • the holes are between 4 and 15 mm (for example, 8 mm) in diameter.
  • the holes 8) are disposed along one or more rows parallel to the feed direction A of the compensating belt 6.
  • the holes 8 are disposed along two rows parallel to the feed direction A, where the holes 8 of the first row are not completely aligned with the holes 8 of the second row, so that all the blanks 100 resting on the compensating belt 6 are subjected to suction.
  • the compensating belt 6 (which may be a toothed belt) is driven by a respective drive pulley 9, connected to a respective drive unit, not illustrated. Further, the compensating belt 6 is preferably made of a non-porous flexible material, specifically rubber or elastomeric material. Alternatively, the compensating belt 6 may be made of porous material, with or without the holes 8.
  • the device 1 further comprises, under the upper section 7 of the compensating belt 6, a suction support panel 10 configured in such a way that each hole 8 of the upper section 7 of the compensating belt 6 remains connected to the pneumatic suction source as the compensating belt 6 advances.
  • the upper section 7 of the compensating belt 6 may be disposed in sliding support relationship on the support panel 10.
  • the support panel 10 is flat and is provided with at least one elongate recess 11 connected to the pneumatic suction source and aligned with a feed trajectory of the holes 8 so it is simultaneously connected to a plurality of holes 8.
  • connection of the recess 11 to the suction source may be accomplished by providing the recess 11 with respective suction ports 11 a, or holes, connected at the bottom to the pneumatic suction source.
  • the suction ports 11a are disposed in succession along the feed direction A, at a different spacing compared to the holes 8 of the compensating belt 6, specifically at a smaller spacing ( Figure 4 ).
  • the support panel 10 may have two or more elongate recesses 11 which, in that case, are separated from each other by a separating wall 11b whose size, along the feed direction A, is smaller than the diameter of the holes 8 of the compensating belt 6.
  • the device 1 comprises two compensating belts 6 running side by side and disposed symmetrically about a longitudinal feed plane (perpendicular to the blanks) of the stack P of blanks 100.
  • the compensating belt 6 is associated with adjustment means configured to adjust the feed speed of the compensating belt 6 in such a way as to vary the pushing action on the stop element 4a.
  • the adjustment means comprise at least one thrust sensor (not illustrated) associated with the at least one stop element 4a and a control unit configured to vary the feed speed of the compensating belt 6, specifically by feedback, as a function of the thrust value measured by the at least one thrust sensor.
  • the control unit is preferably configured to keep the thrust value of the stack P of blanks 100 on the at least one stop element 4a constant, specifically at a predetermined or settable value.
  • the thrust sensor comprises, for example, an analogue sensor or a load cell, applied on at least one of the stop elements 4, 4a.
  • the thrust sensor is applied on at least on stop element: for example, the bottom one (preferred). Where the feed direction A is horizontal, however, it is preferable for each stop element 4, 4a to be associated with a respective thrust sensor.
  • the device 1 preferably comprises a support surface 16 which is configured to support the stack P of blanks 100 and above which there is a levelling device 13, configured and/or disposed to operate on a portion of the stack P of blanks 100 resting on the support surface 16 to push the single blanks 100 against the support surface 16 and aligns them with each other.
  • the configuration of the levelling device 13 is selected between a belt (embodiment shown in Figure 1 ), a roller or a fixed (elastically deformable) baffle.
  • the device 1 further comprises, between the compensating belt 6 and the stop element 4, 4a, at least one aligning belt 14 disposed and/or configured to come into local contact with an outfeed end stretch P2 of the stack P of blanks 100 and in such a way as to ensure that each blank 100 of the outfeed end stretch P2 is progressively aligned with a positioning plane, specifically by localized acceleration or deceleration performed by the aligning belt 14 on the blanks of the outfeed end stretch P2.
  • the aligning belt 14 has the effect of locally deforming the blanks 100 of the outfeed end stretch P2, specifically through local acceleration or deceleration performed by the aligning belt 14 so as to bring forward the rearmost zones of the blanks or to hold back the frontmost portions, thus causing the blanks 100 to gradually adopt a shape as planar as possible in a plane perpendicular to the feed direction of the stack P ( Figure 5 ).
  • the aligning belt 14 has a respective drive device (not illustrated: a motor-driven pulley, for example) and is fed at a higher or lower speed than the feed speed of the stack P of blanks 100. Further, this feed speed is different, hence higher or lower, than the feed speed of the compensating belt 6.
  • the purpose of the aligning belt 14 is to come into contact with a perimeter portion of each blank 100 of the outfeed end stretch P2 of the stack P of blanks 100 so as to bring forward or hold back the perimeter portion relative to the rest of the blank 100 in order to reduce or eliminate curvatures or bulges in the blanks 100.
  • the blanks 100 of the outfeed end stretch P2 of the stack P of blanks 100 bulge forward - that is to say, have a backward facing concavity, where the lateral edges lag behind - the aligning belt 14 could compensate for the bulge by locally accelerating the lagging edge, thereby varying the positioning plane of the blank 100 so as to give the blank a "flatter” shape.
  • a backward bulge - that is to say, a blank 100 with a forward facing concavity, where the lateral edges are at the front - can be reduced or eliminated by slowing the aligning belt 14 that is in contact with the edges at the front.
  • the aligning belt 14 may be disposed below and/or beside the blanks 100 relative to their feed direction A and, in some cases, above them.
  • This configuration can advantageously serve to reduce or eliminate forward facing bulges of the blanks 100, specifically curvatures of the blanks about a substantially vertical axis (having the shape of a C in the plan view of Figure 2 ).
  • the aligning belts 14 are in contact with lagging (laterally outermost) portions of the bottom edge of the blanks 100 and accelerating these portions would make the blanks 100 at the outfeed end P2 of the stack P adopt a flatter shape which makes them easier to be picked up by the transfer device 200.
  • the aligning belts 14 are preferably positioned under the stack of blanks and their respective upper sections 15 are parallel, preferably coplanar, with the upper sections 7 of the compensating belts 6.
  • the lateral aligning belt has a lateral operating section positioned parallel to the feed direction A of the stack P of blanks 100 and defining a lateral support for the end portion P2, so that the latter laterally abuts the lateral operating section of the aligning belt to support it, preferably to exclusively support it.
  • aligning belts 14 are advantageous in the case of blanks 100 made of recycled or thin card material which tend to bend, hence bulge, more easily, whilst the use of a single aligning belt 14 is recommended in the case of material of non-uniform thickness (for example, a stack of blanks with labels on them, hence thicker where the labels are).
  • the aligning belt 14 may act on a respective side or perimeter portion of the blanks 100 which the stop element 4 does not act on. In other words, the aligning belt 14 and the stop element 4 act on respective, different sides or perimeter portions of the blanks 100, so as not to interfere with each other.
  • the aligning belt 14 and the stop element 4 may act on the same sides or perimeter portions of the blanks 100.
  • the operating section (in contact with the blanks 100, specifically at the bottom, side, or top thereof) of the aligning belt 14 has a length I of between 15 and 45 mm (for example, 30 mm) and terminates preferably at the end blank 100 or in the proximity thereof.
  • the aligning belt 14 acts on a different stretch or section of the stack P of blanks 100 than the compensating belt 6, specifically further downstream thereof.
  • the compensating and aligning actions do not interfere with each other but take place at different positions and instants.
  • the aligning belt 14 and the compensating belt 6 might be partly opposite to each other in the direction orthogonal to the feed direction A. In that case, a part of the blanks might be subjected simultaneously to the compensating and aligning action.
  • the aligning belt 14 is made of flexible, preferably non-porous material, specifically rubber or elastomeric material, and may be a toothed belt.
  • the aligning belt 14 may have a porous and/or perforated configuration to act as a suction belt or, alternatively, it may be a non-suction belt acting on the blanks 100 only by friction.
  • the feed speed of the aligning belt 14 may be adjusted by feedback as a function of the shape of the blanks (detected, for example, by sensors, optical sensors, for example) or, alternatively, it may be kept constant at a predetermined or presettable value.
  • the thrust sensor detects the instantaneous pushing action applied by the stack P on the respective stop element 4 and sends a corresponding signal to the control unit which, based on the value transmitted with the signal, instantaneously corrects the feed speed of the compensating belt 6 by actuating the drive unit of the belt 6 accordingly.
  • the control unit may compare the value of the pushing action measured and a predetermined or presettable reference value and, based on the comparison, determines the extent of the corrective action to be applied to the feed speed of the compensating belt 6.
  • the blanks of the end stretch P2 of the stack P are operated on by the aligning belt 14 which is, for example, set to a feed value determined as a function of the corrective action to be applied on the shape of the blanks 100, specifically to locally vary the speed of a peripheral zone of the blanks 100 of the end stretch P2, in such a way as to locally deform the blanks 100, varying the geometry of the positioning plane to compensate the curvature or bulging of the blanks.
  • the feed speed of the aligning belt 14 is thus selected in such a way that it is greater than or less than the feed speed of the stack P of blanks 100.
  • the aligning action might be accomplished not by one or more aligning belts but by one or more generic aligning means configured to locally accelerate or decelerate a peripheral zone of the blanks 100.
  • a different embodiment of the aligning means might be an aligning wheel or roller whose axis is transverse or perpendicular to the feed direction A of the stack P of blanks.
  • Also imaginable according to the invention are solutions comprising at least one compensating means (or belt) but without aligning belts.
  • the present invention achieves the preset aims, overcoming the disadvantages of the prior art.
  • the action of the compensating belts allows keeping constant the thrust applied by the stack of blanks on the end blank (hence on the stop element), ensuring the optimum conditions for the transfer device to pick up the blanks.
  • the suction applied by the compensating belt allows removing the air between the blanks above, which are thus made to adhere more closely to each other to form a compact block of blanks.
  • This compact block, held by the suction of the compensating belt also acts as a "screen" against the variable pushing action of the trailing end of the stack of blanks, thereby making the pushing action applied on the end blank (hence on the stop element) even more uniform.
  • the action of the aligning belts allows stabilizing the shape of the blanks in the proximity of the transfer device (making them flatter), thereby increasing the reliability with which the single blanks at the end of the stack are picked up.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
EP20177980.8A 2019-06-05 2020-06-03 Dispositif et procédé pour alimenter des flans dans une machine de transformation ultérieure Active EP3747809B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201900008115 2019-06-05

Publications (2)

Publication Number Publication Date
EP3747809A1 true EP3747809A1 (fr) 2020-12-09
EP3747809B1 EP3747809B1 (fr) 2023-11-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20177980.8A Active EP3747809B1 (fr) 2019-06-05 2020-06-03 Dispositif et procédé pour alimenter des flans dans une machine de transformation ultérieure

Country Status (2)

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EP (1) EP3747809B1 (fr)
PL (1) PL3747809T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972708A1 (fr) * 1998-07-15 2000-01-19 G.D S.p.A. Dispositif pour alimenter des flans dans une machine d'emballage
DE10350623B3 (de) * 2003-10-30 2005-04-14 Siemens Ag Vorrichtung zum Vereinzeln von flachen Sendungen in stehender Position aus einem Sendungsstapel
US20070052154A1 (en) * 2005-09-07 2007-03-08 Kabushiki Kaisha Toshiba Paper sheet takeout device
EP2497728A2 (fr) * 2011-03-11 2012-09-12 Kabushiki Kaisha Toshiba Appareil d'extraction de feuilles de papier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972708A1 (fr) * 1998-07-15 2000-01-19 G.D S.p.A. Dispositif pour alimenter des flans dans une machine d'emballage
DE10350623B3 (de) * 2003-10-30 2005-04-14 Siemens Ag Vorrichtung zum Vereinzeln von flachen Sendungen in stehender Position aus einem Sendungsstapel
US20070052154A1 (en) * 2005-09-07 2007-03-08 Kabushiki Kaisha Toshiba Paper sheet takeout device
EP2497728A2 (fr) * 2011-03-11 2012-09-12 Kabushiki Kaisha Toshiba Appareil d'extraction de feuilles de papier

Also Published As

Publication number Publication date
EP3747809B1 (fr) 2023-11-08
PL3747809T3 (pl) 2024-05-06

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