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EP0574745A1 - Dispositif pour séparer individuellement des feuilles empilées en matière plastique, en carton ou similaire - Google Patents

Dispositif pour séparer individuellement des feuilles empilées en matière plastique, en carton ou similaire Download PDF

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Publication number
EP0574745A1
EP0574745A1 EP93108479A EP93108479A EP0574745A1 EP 0574745 A1 EP0574745 A1 EP 0574745A1 EP 93108479 A EP93108479 A EP 93108479A EP 93108479 A EP93108479 A EP 93108479A EP 0574745 A1 EP0574745 A1 EP 0574745A1
Authority
EP
European Patent Office
Prior art keywords
sheets
magazine
sheet
shaft
shoulder
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
EP93108479A
Other languages
German (de)
English (en)
Other versions
EP0574745B1 (fr
Inventor
Wilhelm Reil
Udo Liebram
Heiko Bub
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP0574745A1 publication Critical patent/EP0574745A1/fr
Application granted granted Critical
Publication of EP0574745B1 publication Critical patent/EP0574745B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/085—Suction grippers separating from the bottom of pile
    • 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
    • B65H3/34—Article-retaining devices controlling the release of the articles to the separators

Definitions

  • the invention relates to a device for separating sheets of plastic, cardboard or the like stacked in a magazine with at least one movable suction device and for transporting the separated sheets to a work station, the sheets in the stack lying essentially horizontally by holders at the lower edge of the magazine are supported and the bottom sheet is exposed in between and is accessible to the vacuum cleaner.
  • the lower pair of shafts then grips with its grooves only the sheet closest to it, which falls into a magnetic field when it is subsequently relieved, by means of which the sheets are held at a vertical distance from one another, in order to then be transported under the magnetic field between two vertical screws, which the get final separation with certainty.
  • This known device can only be used with very stiff or hard bends made of metal or the like, which neither have to be supported on their surface nor have to be transported from top to bottom by other means, but rather fall into the next station due to their high weight.
  • reliable separation is only possible by interconnecting two pairs of shafts with in-phase opposite, continuous rotary motion with a downstream magnetic field and pairs of screws. The cost of such a device is considerable.
  • the invention is therefore based on the object to provide a separating device of the type described in more detail above, with which the sheets of plastic, cardboard or the like can be reliably separated using simpler means and can preferably be reproducibly brought into engagement with the mentioned suction device in a precise position .
  • a rotatably driven shaft is arranged along at least one of the two lower edges of the magazine as a holder, the cross-section of which is excluded in the region of the length of the blade to form a shoulder, the depth of the shoulder being the same the thickness of the sheet to be separated and that a sucker is arranged to move and retract from below against the sheet approximately in the middle between the edges of the magazine.
  • the bottom sheet falls into the aforementioned shoulder-shaped recess of the at least one shaft and is gripped even at a corrugated sheet edge laterally from the shoulder at numerous points in such a way that with certainty only the bottom sheet when turning the shoulder in the direction of the opposite holder is gripped and subjected to a bending movement due to the shortening of the distance to the opposite holder.
  • the shoulder has a small edge which, prior to engagement with the sheet edge, lies in the direction of the stack height, that is to say is essentially arranged vertically, and a support surface at an angle of approximately 90 ° to which the sheet edge comes to rest.
  • both mutually opposite holders are also formed as partially recessed shafts which are driven in rotation in opposite directions synchronously with one another.
  • the rotation of the shafts about their longitudinal axes is advantageously oscillating, the arc of the oscillation needing to be only in a range between 10 and 40 °, and in practice it has even been found that a rotation over an angular range of between 20 ° and 30 ° brings good results. This allows the device to separate a large number of sheets per unit of time.
  • the shaft has an approximately semi-circular cross-section in addition to the shoulder.
  • a normal wave is round and its outer surface is imagined as a cylinder jacket.
  • the shaft extends under the magazine edge over the entire length of the magazine and beyond its side walls thus certainly longer than the longitudinal edge of the sheet to be separated.
  • the shoulder mentioned can extend beyond the length of the sheet edge and possibly even beyond the corresponding magazine length.
  • the recess which is semicircular in cross section is only provided over the length of the leaf edge, if only for reasons of stability, for exact shaft movements.
  • the shaft In the area of the sheet to be separated, the shaft is flattened, so that a space is created between the waves that is at least wider than the smallest distance between two opposite shafts with a circular cross-section without the recess according to the invention.
  • an enlarged space has advantages for the movement of machine elements, as will be described in the following, which could not be moved in a comparably good manner without this enlarged space.
  • the suction cup is translationally movable by means of a first drive, and the first drive is fastened to a second drive for carrying out a rotary movement.
  • the suction cup can be moved in a straight line, so that it can move from below through the opening of the Magazine can be moved between the opposite holders to the lower surface of the bottom sheet.
  • the first drive can then move the sheet sucked by vacuum in a straight line in the opposite direction to the advancing movement of the suction device downward from the stack. Since this first drive is now attached to a second rotary drive, the suction device can additionally perform a rotary movement together with the attached and separated sheet and transport the separated sheet to another location, e.g. a place where the isolated sheet is removed and subjected to further treatments.
  • the sheets to be separated are rectangular and sometimes have a greater length than width, so that it is advisable to provide correspondingly long shafts as a holder arn magazine below and, accordingly, to arrange a plurality of suction cups in a row, so that the elongated sheet over its entire length can be recorded and held in several places.
  • two so-called first drives spaced apart over the length of the sheet to be separated, although a first drive could also be provided for each suction cup.
  • two first drives which can move any number of suction cups simultaneously using suitable holding means, in which case both first drives must of course then be moved in phase.
  • the second drive for the rotary movement can simultaneously turn both first drives (also in phase with one another) and thus rotate all suction cups in a row or possibly even several rows simultaneously and in phase.
  • a translationally movable pressure plate is attached to the first drive, on which the suction pad can be moved in a straight line in the same direction as the pressure plate via a third drive.
  • the above-mentioned machine element is thus a pressure plate in this embodiment, which is namely arranged on the side facing the sheet to be separated and against which this sheet can be placed if the single suction cup or the plurality of suction cups is translational / linear via the third drive mentioned withdrawn relative to the Andrudkplatte.
  • the pressure plate preferably has openings into which the suction cup (s) can be drawn, with the result that the surface of the pressure plate is flush, smooth or flat and the sheet to be separated can be applied accordingly.
  • the third drive mentioned will therefore expediently be arranged on the back of the pressure plate, which is turned away from the magazine, so that the respective suction cup can be retracted into the outer contour of the pressure plate (with the aid of the third drive), and then the pressure plate with all of it Suction cups and their third drives are rotated by the second drive to remove the separated sheet.
  • the rotationally coordinated rotary movements of the one or two shafts on the magazine edge on the one hand and the transport shaft of the second drive on the other hand are carried out via pneumatically, hydraulically or mechanically controlled levers.
  • At least one wall of the magazine for centering the stacked sheets is arranged to be displaceable perpendicular to the wall plane.
  • one wall of the magazine is pressed gently via an air cylinder in the direction of the opposite, stationary magazine wall, thereby centering the stack of sheets to be separated, with the advantage that the position of each sheet to be separated is always the same and can be reproduced very precisely. So you can attach every single sheet to the suction cup in an exact position. This offers considerable advantages for further precise placement of the sheet at subsequent work places.
  • the magazine generally designated 1
  • the magazine is to be thought of as rectangular in plan view and has two longitudinal walls 2, 2 'and two transverse walls 3, 3', each wall consisting of two parallel wall parts, which, however, are not described in more detail here.
  • the walls 2, 2 ', 3, 3' are vertical (perpendicular), so that they can be loaded from above with sheets 6 of plastic produced by a cutting device 4 from a web 5.
  • the bottom sheet 6 falls to the lower edges 7 of the magazine 1, below which two shafts 8 are arranged lying parallel to each other.
  • the axis of rotation 9 of the shafts 8 lies almost in the extension of the inner surface of the walls 2, 2 ', only slightly shifted outside the opening 10, as can be seen more clearly from FIG.
  • the opening 10 extends from the inner lower edge of the edge 7 of the one longitudinal wall 2 to the opposite lower left edge of the right edge 7 of the right longitudinal wall 2 'and is rectangular in plan view in the direction of the arrow 11 (FIG. 2).
  • the respective shaft 8 touches the lower edge 7 of the side wall 2, 2 'of the magazine 1, which results in contact points X (FIG. 3) and also on the opposite side (without a designation); in practice small contact surfaces because the leaves are not 100 percent rigid and straight. On the contrary, they have to be resiliently flexible, because otherwise the separating device described here would not work.
  • the two shafts 8 are, so to speak, the oats on the lower edge 7 of the magazine 1, on which the sheets 6 are supported.
  • Each suction cup 13 is attached to the outer end 14 of the piston rod 15 of a so-called third drive 16, so that there are as many third drives 16 as suction cups 13.
  • These third drives 16 are fastened to a pressure plate 17 which extends over almost the entire length ( L) and extends transversely to almost the entire width of the sheets 6. This pressure plate 17 therefore holds the third drive 16 in each case and enables a relative movement of the suction cups 13 in the direction of the double arrow 18 in a straight line upwards and for retraction vertically downwards.
  • the pressure plate 17 in turn is attached to the outer ends of further piston rods 19 of a so-called first drive 20, which is attached in the form of an air cylinder 20 to a transport shaft 21 which is supported in two bearings 22 as shown in FIG. 2.
  • the axis of rotation of the transport shaft 21 is designated 23.
  • the rotary movement of the transport shaft 21 takes place via a controlled lever 24; the rotation of the respective shaft 8 via a lever 25.
  • the drives of the levers 24 and 25 are not shown.
  • two air cylinders 20 are arranged so that the pressure plate 17 is securely and reliably held in two places. Separated from the movement of the suction cups 13 with respect to the pressure plate 17, as represented by the double arrow 18, the pressure plate 17 itself can also be moved in the direction of the double arrow 26 relative to the transport shaft 21 via the so-called first drive 20 (air cylinder).
  • the stroke of the translational up and down movement 26 of the pressure plate 17 is greater than the stroke of the straight up and down movement of the suction cups 13 according to the double arrow 18.
  • the rotary movement of the transport shaft 21 in the direction of the curved double arrow 27 in FIG. 1 causes the suction cups 13 to move from the position shown in solid lines in FIG. 1 to the position shown in broken lines, in which the suction cup is denoted by 13 '.
  • a heated plate 28 is shown with a plurality of vacuum openings 29, the vacuum openings on the right surface being thought to be arranged. This heated plate 28 can be moved up and down vertically in the direction of the double arrow 30.
  • the sheets 6 to be separated in the stack 12 are centered by moving the right rear side wall 3 'of the magazine 1 with the aid of an air cylinder 31 which allows the side wall 3' to be displaced in the direction of the double arrow 33 via a piston rod 32.
  • the respective shaft 8 is supported in bearings 34.
  • FIGS. 3 and 4 In FIG. 3, at the bottom left you can see the right end of the pressure plate 17, which has broken off to the left, as well as the isolated sheet 6 above and the stack 12 in the magazine 1. Under its edge 7 is the shaft 8, the diameter D of which is shown in FIG.
  • the cross section of the shaft 8 shown in FIG. 3 is provided with a recess forming a shoulder 35.
  • Its depth t is as thick as the sheet 6 to be separated.
  • the radially arranged plane 36 of the shoulder therefore represents a very short area, i.e. it corresponds to the height t.
  • This plane appears in the view in FIG. 4 as line 36.
  • the right edge 37 of sheet 6 bears against this shortly before and at the latest after the start of rotation of shaft 8. For clarification, this right edge 37 of the sheet 6, which appears as a line, is drawn lying at a somewhat exaggerated distance from the edge 36 in FIG.
  • the shaft 8 at the radial distance from the shoulder 35 is also provided with a semicircular recess 40, which can be seen in FIG. 3 as a partial circular surface, while the empty space 40 can be seen in FIG.
  • This - seen in cross section - semicircular recess 40 extends only over the length L of the respective blade 6, does not extend over the circular end region d of the shaft 8.
  • the purpose of this semicircular recess 40 is to create a space under the opening 40, as shown in Figure 1. Through this space, the pressure plate 17 is supposed to be close up can be moved to the bottom sheet 6, so that the excavation path of the suction device 13 from the surface of the pressure plate 17 according to the double arrow 18 can only be very short (small stroke).
  • the space according to the illustration in FIG. 1, in particular on the left side is intended to enable the rotary movement of the pressure plate 17 with the sheet 6 fastened via the suction cups 13 according to arrow 27 to the bottom left.
  • the suction device 13 is pivoted via the second drive 21, 24 with the pressure plate 17 retracted into the upper right position shown in solid lines in FIG. Thereafter, the first drive 19, 20 is actuated until the pressure plate 17 has moved upward from the position shown with solid lines to such an extent that the piston rod 19 can be seen, which can only be seen in FIG. 1 in the position shown in broken lines as 19 '. Then the respective third drive 15, 16 is actuated so that the suction cups 13 can move up in the direction of the arrow 18 up to the underside of the sheet 6 offered by the shafts 8.
  • suction cups 13 grasp the underside of the sheet 6, vacuum is applied, and the sheet 6 can be pulled out of engagement by the shoulders 35 of the two shafts 8 by pulling back the piston rod 15 by means of an air cylinder 16 and can be applied downward against the pressure plate 17.
  • the first drive is switched on again, the piston rods 19 pull the pressure plate radially back, reducing the turning radius.
  • the second drive is then switched on by rotating the transport shaft 21 in the direction of the curved arrow 27 (FIG. 1) downward by about 90 ° so that the pressure plate assumes the dashed position. In this one can see the pressure plate 17 'with the sheet 6' held by the suction cups 13 '.
  • the first drive has meanwhile been switched on, so that the piston rod 19 'is moved radially outward, so that the blade 6' comes into contact with the surface of the heated plate 28.
  • the vacuum can now be applied via the nozzle openings 29 while the suction devices 13 'are being ventilated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Making Paper Articles (AREA)
EP93108479A 1992-06-13 1993-05-26 Dispositif pour séparer individuellement des feuilles empilées en matière plastique, en carton ou similaire Expired - Lifetime EP0574745B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219445 1992-06-13
DE4219445A DE4219445A1 (de) 1992-06-13 1992-06-13 Vorrichtung zum Vereinzeln von gestapelten Blättern aus Kunststoff, Pappe oder dergleichen

Publications (2)

Publication Number Publication Date
EP0574745A1 true EP0574745A1 (fr) 1993-12-22
EP0574745B1 EP0574745B1 (fr) 1997-03-26

Family

ID=6460981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108479A Expired - Lifetime EP0574745B1 (fr) 1992-06-13 1993-05-26 Dispositif pour séparer individuellement des feuilles empilées en matière plastique, en carton ou similaire

Country Status (6)

Country Link
US (1) US5407187A (fr)
EP (1) EP0574745B1 (fr)
JP (1) JPH06199426A (fr)
AT (1) ATE150730T1 (fr)
CA (1) CA2097543A1 (fr)
DE (2) DE4219445A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710236B4 (de) * 1996-03-20 2008-01-03 Giesecke & Devrient Gmbh Vorrichtung zum Bearbeiten von flachen, flexiblen Gegenständen, wie z. B. Karten aus Kunststoff oder Papier
WO2014094184A1 (fr) * 2012-12-17 2014-06-26 Soudronic Ag Dispositif de dégerbage et procédé de dégerbage de tôles métalliques
CN106005579A (zh) * 2016-07-15 2016-10-12 成都松川雷博机械设备有限公司 一种装盒机的下盒机构
DE102016125834A1 (de) 2016-12-29 2018-07-05 Stefan Wendling Vereinzelungsvorrichtung und Verfahren zum Vereinzeln von Plattenelementen

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5752695A (en) * 1996-04-08 1998-05-19 Eastman Kodak Company Film sample positioning apparatus
DE10154235B4 (de) * 2001-11-07 2005-06-02 Abro Weidenhammer Gmbh Vorrichtung zum Vereinzeln scheibenförmiger, biegsamer Materialzuschnitte
ITBO20030549A1 (it) * 2003-09-22 2005-03-23 Gd Spa Unita' di alimentazione di fogli ad una linea di incarto
CN103625951B (zh) * 2013-11-27 2016-08-17 黄晓燕 单张印品质量检测机非擦花放料结构
JP7023959B2 (ja) * 2016-12-05 2022-02-22 テトラ ラバル ホールディングス アンド ファイナンス エス エイ カートンブランクを整列させるための装置及び方法
CN108099262A (zh) * 2017-12-18 2018-06-01 海宁诚达机械有限公司 一种直筒机的送纸机构
CN111204039B (zh) * 2020-04-01 2021-01-05 江苏盛锐光电科技有限公司 一种手机贴膜设备

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE2436354A1 (de) * 1974-07-27 1976-02-05 Focke Pfuhl Verpack Automat Verfahren und vorrichtung zur fortlaufenden automatischen entnahme von zuschnitten aller art durch kontinuierlich umlaufende entnahme- und transportwalzen sowie stapelmagazin zur bildung von angepassten zuschnittslagen
US4253653A (en) * 1978-04-07 1981-03-03 Agfa-Gevaert, A.G. Apparatus for singularizing stacked sheets of radiation-sensitive material or the like
DE3025201A1 (de) * 1980-07-03 1982-01-28 Hoechst Ag, 6000 Frankfurt Vorrichtung fuer den transport und die positionierung von druckplatten
US4981235A (en) * 1988-03-28 1991-01-01 Targa Industries, Inc. Unitary coupon dispenser

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DE7336493U (de) * 1975-01-02 Kodak Ag Vorrichtung zum Trennen und Abheben eines Aufzeichnungsträgers von einem Stapel
US1916723A (en) * 1930-08-26 1933-07-04 Ferrar Bernard Slip-sheeter
US2817517A (en) * 1954-01-05 1957-12-24 Gardner Board & Carton Co Blank feeding apparatus
US2817518A (en) * 1956-01-25 1957-12-24 Gardner Board & Carton Co Blank feeding apparatus
CH446188A (de) * 1966-01-15 1967-10-31 Tagers Gmbh Verfahren und Vorrichtung zum Erfassen und Vereinzeln der Bleche eines Blechstapels, sowie zum Transportieren der einzelnen Bleche zu einer Arbeitsstelle
DE1956948A1 (de) * 1968-11-21 1970-06-18 Rospatch Corp Vereinzelungsvorrichtung
DE2247526A1 (de) * 1972-09-28 1974-04-04 Siemens Ag Roentgenaufnahmeeinrichtung
DE2539200A1 (de) * 1975-09-03 1977-03-17 Geimuplast Mundt Kg Peter Verfahren zum zufuehren von gegenstaenden sowie vorrichtung zum durchfuehren eines solchen verfahrens
JPS55140439A (en) * 1979-04-13 1980-11-01 Tokico Ltd Board feeding device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2436354A1 (de) * 1974-07-27 1976-02-05 Focke Pfuhl Verpack Automat Verfahren und vorrichtung zur fortlaufenden automatischen entnahme von zuschnitten aller art durch kontinuierlich umlaufende entnahme- und transportwalzen sowie stapelmagazin zur bildung von angepassten zuschnittslagen
US4253653A (en) * 1978-04-07 1981-03-03 Agfa-Gevaert, A.G. Apparatus for singularizing stacked sheets of radiation-sensitive material or the like
DE3025201A1 (de) * 1980-07-03 1982-01-28 Hoechst Ag, 6000 Frankfurt Vorrichtung fuer den transport und die positionierung von druckplatten
US4981235A (en) * 1988-03-28 1991-01-01 Targa Industries, Inc. Unitary coupon dispenser

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710236B4 (de) * 1996-03-20 2008-01-03 Giesecke & Devrient Gmbh Vorrichtung zum Bearbeiten von flachen, flexiblen Gegenständen, wie z. B. Karten aus Kunststoff oder Papier
WO2014094184A1 (fr) * 2012-12-17 2014-06-26 Soudronic Ag Dispositif de dégerbage et procédé de dégerbage de tôles métalliques
EP3056293A1 (fr) * 2012-12-17 2016-08-17 Soudronic AG Dispositif de désempilage et procédé de désempilage de tôles métalliques
US10479620B2 (en) 2012-12-17 2019-11-19 Soudronic Ag Destacking device and method for destacking metal sheets
CN106005579A (zh) * 2016-07-15 2016-10-12 成都松川雷博机械设备有限公司 一种装盒机的下盒机构
DE102016125834A1 (de) 2016-12-29 2018-07-05 Stefan Wendling Vereinzelungsvorrichtung und Verfahren zum Vereinzeln von Plattenelementen
DE102016125834B4 (de) 2016-12-29 2023-01-19 Stefan Wendling Vereinzelungsvorrichtung und Verfahren zum Vereinzeln von Plattenelementen

Also Published As

Publication number Publication date
CA2097543A1 (fr) 1993-12-14
US5407187A (en) 1995-04-18
JPH06199426A (ja) 1994-07-19
EP0574745B1 (fr) 1997-03-26
DE59305929D1 (de) 1997-04-30
DE4219445A1 (de) 1993-12-16
ATE150730T1 (de) 1997-04-15

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