EP0344363B1 - Dispositif pour orienter et ouvrir des sacs en matière plastique mis à plat - Google Patents

Dispositif pour orienter et ouvrir des sacs en matière plastique mis à plat Download PDF

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Publication number
EP0344363B1
EP0344363B1 EP88119739A EP88119739A EP0344363B1 EP 0344363 B1 EP0344363 B1 EP 0344363B1 EP 88119739 A EP88119739 A EP 88119739A EP 88119739 A EP88119739 A EP 88119739A EP 0344363 B1 EP0344363 B1 EP 0344363B1
Authority
EP
European Patent Office
Prior art keywords
bag
sack
endless conveyor
conveyor
pressure 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.)
Expired - Lifetime
Application number
EP88119739A
Other languages
German (de)
English (en)
Other versions
EP0344363A1 (fr
Inventor
Frank-Otto Dipl.-Ing. Görlitz
Hans Joachim Droste
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.)
LIBRAWERK MASCHINENFABRIK GMBH
Original Assignee
Librawerk Maschinenfabrik GmbH
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 Librawerk Maschinenfabrik GmbH filed Critical Librawerk Maschinenfabrik GmbH
Priority to AT88119739T priority Critical patent/ATE101569T1/de
Publication of EP0344363A1 publication Critical patent/EP0344363A1/fr
Application granted granted Critical
Publication of EP0344363B1 publication Critical patent/EP0344363B1/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
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
    • B65H9/103—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop
    • B65H9/106—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop using rotary driven elements as part acting on the article
    • 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
    • B65B43/26—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks
    • B65B43/30—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by grippers engaging opposed walls, e.g. suction-operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
    • B65H9/101—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting on the edge of the article

Definitions

  • the invention relates to a device for aligning and opening flat-lying plastic sacks, in which each sack is placed on a storage table and transferred to a predetermined position on the table and aligned with the aid of pressure rollers, and in the aligned position by means of suction heads acting on the opening-side ends of the sack walls in the open position is transferred.
  • the sack is aligned in only one direction, so that additional previous or subsequent measures are necessary in order to transfer it to a predetermined position in relation to the other direction (DE-PS 24 52 049).
  • An automatic filling system for filling bags is known from DE-A-36 23 086 (& FR-A-2 584 676), in which alignment by means of pressure rollers is also possible in the X and Y directions.
  • the invention has for its object to provide a device of the type mentioned in DE-A-3 623 086 in such a way that, with a simple construction, sacks of different dimensions are positioned on the storage table in both directions and a sorting out of the sacks is made possible, the opening side of which End cannot be transferred to the open position.
  • the device mentioned in the introduction is characterized by the features mentioned in the characterizing part of claim 1.
  • the alignment of the sacks transferred or deposited on the storage table takes place in two stages, namely first by the centering fingers in one direction and subsequently by the drivable endless conveyor in connection with the pressure rollers in the other direction, with a lateral shift across by the centering fingers the direction of conveyance is definitely avoided.
  • the sensors interacting with the pressure rollers and the drive of the endless conveyor are provided, which limit the conveyance of the respective sack very precisely, especially since the endless conveyor including the drive device can be carried out very easily and practically no noticeable follow-up times occur when it is switched off.
  • the sack can be removed from the table in one direction into the centering position and also in the other direction with the aid of the conveyor and the pressure rollers if the sack cannot be opened, and by detecting it more appropriately Criteria can be determined by means of the sensors.
  • the strips which run parallel to one another at a distance, can be moved back and forth with respect to one another, they can be set to different target distances in order to take into account different sack sizes.
  • the endless conveyor can be designed as a relatively narrow belt conveyor, preferably as a narrow toothed belt conveyor, since it does not have to move large masses and, thanks to the interaction with the pressure rollers, despite the narrow design, ensures that even relatively wide sacks can be placed safely along the table level while maintaining them plane-level location.
  • each strip is connected to a piston-cylinder arrangement, which in turn is held on a carrier so as to be displaceable transversely to the longitudinal direction of the strip.
  • the piston-cylinder arrangement In one end position of the piston-cylinder arrangement and the resulting greatest distance between the centering fingers, the respective sack is placed on the table and the piston-cylinder arrangement is transferred to the other end position, which corresponds to the centering position for the sack.
  • the stroke of the piston-cylinder arrangements is relatively narrow in order to achieve centering by means of short movements of the centering fingers.
  • a particularly safe and simple guiding of the carriages results if each carriage is connected to a threaded sleeve guided on one spindle and is slidably guided on the other spindle.
  • the pressure rollers cooperating with the endless conveyor which in their operative position press the sack against the upper run of the endless conveyor, are expediently provided with lifting drives in the form of piston-cylinder arrangements, these piston-cylinder arrangements being held in a frame projecting from the table.
  • the pressure rollers can be fastened as single rollers or in pairs in the direction of conveyance to a carrier provided for this purpose.
  • a sensor provided in the table top is arranged as a positioning sensor outside the placement position of the sack in the direction of further conveyance of the sack when it is removed from the table. Via this sensor, the respective feed of the sack can be stopped very precisely by means of the endless conveyor in cooperation with at least one pressure roller, so that all sacks take up the same position on the table when the alignment process is finished and are opened in this position and open Condition of the gripper for further conveyance, for example to a bag clamp, can be detected.
  • the sack In the aligned position, the sack should cover the positioning sensor, so that the sensor can also be used as an indicator of the opening process when the sack is opened later.
  • a further sensor is arranged so far from the positioning sensor in the area where the sack is placed, but so far from the direction in which the sack is conveyed, that it lies on the table in its end position outside the sack.
  • the drive of the endless conveyor and the transfer of a pressure roller into the operative position can be controlled by this sensor by the further sensor, ensuring that the endless conveyor is only put into operation when there is a sack on the table that also covers the other sensor.
  • the suction heads engaging the bag walls are arranged in the region of the positioning sensor, at least one of which is connected to a lifting device.
  • the positioning sensor can also serve as an indicator for monitoring the correct opening of the sack in a particularly simple manner.
  • a sack cannot be opened by the suction heads, it can be ensured by adjusting the suction heads that this sack is lifted off the positioning sensor and, with a corresponding timing of this sensor, by its premature opening Release of the sack, the failure to open the sack is recognizable and the subsequent actuation of the gripper is prevented by appropriate circuit arrangements and, if necessary, after a multiple opening attempt by means of the endless conveyor and the pressure rollers, this sack, which cannot be opened, is transported away from the storage table against its operational further direction of transport is ejected.
  • the drawing shows an embodiment of the invention in a schematic representation.
  • a storage table 2 for the sacks to be aligned is provided at the lower end of a frame designated as a whole, which is held on the frame 1.
  • Centering fingers 5 protrude from the strips 3 and 4, which protrude through slots 6 through the storage table 2 and are angled at their upper ends.
  • each of the strips is connected to a piston cylinder arrangement 7 or 8, which in turn is fastened on a slide 9 or 10.
  • Each of the carriages 9 and 10 is guided on two supports in the form of spindles 11 and 12 running transversely to the strips 3 and 4, or the one section of each carriage 9 and 10 is slidably held on one of the spindles 11 and 12, while its other end is connected to a threaded sleeve of the other spindle or forms the threaded sleeve of the other spindle. In this way, by rotating the spindles 11 and 12 about their longitudinal axes, a mutual displacement of the carriages 9 and 10 can take place, so that the strips 3 and 4 can be adjusted to different distances.
  • the strips 3 and 4 with the upstanding centering fingers 5 serve to align the sacks placed on the storage table 2 between the strips in the spreading position, so that they are brought into a position in which two of their edges are in alignment with the strips 3 and 4.
  • the upper run 15a of the endless conveyor 15 runs closely above the level of the storage table 2.
  • pressure rollers 17, 18 and 19 with piston cylinder arrangements 20 and 21 associated therewith are held in a cross member 1a of the frame 1.
  • the pressure roller 17 is arranged in the area of one end of the upper run 15a of the endless conveyor 15, while the other pressure rollers 18 and 19 are aligned on a common support plate 22 in the direction of the endless conveyor and are arranged above the other end of the endless conveyor 15.
  • the pressure rollers 17 or 18 and 19 can move in the direction of the double arrows 23 and can be pressed into a pressure position against the upper run 15a of the endless conveyor.
  • Sensors 24 and 25 are also arranged in the table top of the storage table 2.
  • the sensor 24 is arranged as a positioning sensor outside the placement position of the sack in the direction of its further conveyance when it is removed from the storage table 2.
  • the other sensor 25 is arranged in the area of the support position of the sack so far away from the positioning sensor 24 against the direction in which the sack is conveyed that it lies on the storage table 2 in its end position outside the sack.
  • Each sack is fed in such a way that the sack is placed on the storage table 2 in such a way that it comes to rest between the opposing centering fingers 5 and under the pressure rollers 17 and 18.
  • the sack is now initially centered by means of the centering fingers 5, in that the strips 3 and 4 are moved relative to one another via the associated piston-cylinder arrangements 7 and 8 up to their end positions.
  • the centering fingers 5 rest on the lateral longitudinal edges of the sack with corresponding prior adjustment of the strips 3 and 4.
  • a sack S is shown in dashed lines in this position.
  • the sack is now aligned in the other direction with the aid of the endless conveyor 15 and the pressure roller 17.
  • the endless conveyor is only actuated when the sensor 25 is covered by a sack.
  • the drive 16 of the endless conveyor 15 is switched on, the bag is conveyed in the direction of the positioning sensor 24 by pressing the pressure roller 17.
  • the drive 16 of the endless conveyor is switched off via the sensor and a control device and the pressure roller 17 is raised by the piston-cylinder arrangement 20.
  • suction heads 26 and 27 are arranged in the frame, of which the suction head 27 is held by a piston-cylinder arrangement 28 can be raised and lowered.
  • the suction heads 26 and 27 engage the sack in the region of the edge which also interacts with the positioning sensor 24.
  • the sack After the sack has been opened by the suction heads 26 and 27, the sack is gripped and conveyed further in the open state, not shown, in the open state and conveyed further, for example, onto a sack clamp.
  • a sack cannot be opened, appropriate adjustment of the suction force can be used, for example, to ensure that the sack is taken up by the suction head 27, which can be raised and lowered, and as a result the positioning sensor 24 is no longer covered by the sack that depending on this state with appropriate timing for the effectiveness of the positioning sensor 24, the suction effect on the sack is interrupted and at the same time the endless conveyor 15 is driven in the opposite direction via the drive 16 and the pressure rollers 18 and 19 move by means of the piston-cylinder arrangement 21 into the pressure position downwards are and thus the sack is pulled against its normal direction of conveyance and is ejected from the storage table 2 in the direction of arrow 28 from the device.
  • the control for ejecting a sack that cannot be opened can also take place in a different way, for example via the suction heads 26 and 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Auxiliary Apparatuses For Manual Packaging Operations (AREA)
  • Making Paper Articles (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Claims (9)

  1. Dispositif pour orienter et ouvrir des sacs (S) en matière plastique reposant à plat, dans lequel chaque sac est déposé sur un reposoir (2) et est transféré à une position prédéterminée sur le reposoir, puis est orienté par l'intervention de galets presseurs et est transféré à la position ouverte lorsqu'il occupe la position orientée, au moyen de têtes d'aspiration (26, 27) venant en prise avec les extrémités des parois des sacs qui sont situées côté ouverture, caractérisé par le fait que, en vue d'orienter le sac (S) dans l'une des directions, deux réglettes (3, 4) s'étendant parallèlement à distance sont retenues au-dessous du reposoir (2), avec faculté de mouvement alternatif réciproque par l'intermédiaire d'un entraînement, et sont équipées de doigts de centrage (5) saillant vers le haut à travers des fentes (6) du reposoir (2) ; par le fait que, en vue d'orienter le sac dans l'autre direction un convoyeur sans fin (15), pouvant être entraîné en mode réversible, est prévu entre les réglettes (3, 4) et s'étend parallèlement à ces dernières, convoyeur dont le brin supérieur (15a) défile à très courte distance au-dessus du plan du reposoir, des galets presseurs (17 ; 18, 19), associés au convoyeur (15), pouvant être abaissés sur les régions extrêmes de son brin supérieur (15a) ; et par le fait que des capteurs (24, 25), actionnables par le sac respectivement placé à plat, sont disposés dans le plateau du reposoir en vue de commander la course des galets presseurs et du convoyeur sans fin.
  2. Dispositif selon la revendication 1, caractérisé par le fait que chaque réglette (3, 4) est reliée à un vérin (7, 8) qui, à son tour, est respectivement retenu sur un support (11, 12) avec faculté de coulissement transversalement par rapport à la direction longitudinale de la réglette.
  3. Dispositif selon la revendication 2, caractérisé par le fait que deux supports parallèles revêtant la forme de broches (11, 12) sont prévus au-dessous des réglettes (3, 4) et s'étendent transversalement par rapport auxdites réglettes, supports sur lesquels sont retenus et guidés des chariots (9, 10) qui sont déplaçables en sens inverse et portent respectivement un vérin (7, 8).
  4. Dispositif selon la revendication 3, caractérisé par le fait que chaque chariot (9 ; 10) est relié à une douille taraudée mobile sur l'une (11, respectivement 12) des broches, et est guidé sur l'autre broche pour effectuer un glissement.
  5. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que des entraînements de levage (20 ; 21), prévus pour les galets presseurs (17 ; 18, 19), revêtent la forme de vérins qui sont retenus dans un bâti (1) saillant verticalement au-delà du reposoir (2).
  6. Dispositif selon l'une des revendications précédentes, caractérisé par le fait qu'un capteur (24) remplissant la fonction d'un capteur de positionnement est placé à l'extérieur de la position dans laquelle le sac (S) repose à plat, dans la direction du convoyage ultérieur du sac lors de son enlèvement à l'écart du reposoir (2).
  7. Dispositif selon la revendication 6, caractérisé par le fait qu'un capteur supplémentaire (25) est placé à distance du capteur de positionnement (24) au voisinage de la position dans laquelle le sac (S) repose à plat, mais toutefois en sens inverse de la direction du convoyage ultérieur, de telle sorte qu'il se trouve à l'extérieur du sac dans sa position extrême sur le reposoir (2).
  8. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les têtes d'aspiration (26, 27) venant en prise avec les parois des sacs sont disposées dans la région du capteur de positionnement (24), têtes dont au moins l'une est reliée à un système de levage (28).
  9. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les capteurs (24, 25) sont raccordés à un système de commande de telle sorte que, après son orientation par les doigts de centrage (5), le sac (S) placé à plat sur le reposoir (2) soit convoyé, au moyen du convoyeur sans fin (15), jusqu'à ce que le capteur de positionnement (24) soit atteint, et que des sacs ne pouvant pas être transférés à la position ouverte soient expulsés, au moyen du convoyeur sans fin (15), en sens inverse de la direction du convoyage ultérieur du sac.
EP88119739A 1988-06-03 1988-11-26 Dispositif pour orienter et ouvrir des sacs en matière plastique mis à plat Expired - Lifetime EP0344363B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88119739T ATE101569T1 (de) 1988-06-03 1988-11-26 Vorrichtung zum ausrichten und oeffnen flachliegender kunststoffsaecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818793 1988-06-03
DE3818793A DE3818793A1 (de) 1988-06-03 1988-06-03 Vorrichtung zum ausrichten und oeffnen flachliegender kunststoffsaecke

Publications (2)

Publication Number Publication Date
EP0344363A1 EP0344363A1 (fr) 1989-12-06
EP0344363B1 true EP0344363B1 (fr) 1994-02-16

Family

ID=6355704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119739A Expired - Lifetime EP0344363B1 (fr) 1988-06-03 1988-11-26 Dispositif pour orienter et ouvrir des sacs en matière plastique mis à plat

Country Status (4)

Country Link
EP (1) EP0344363B1 (fr)
AT (1) ATE101569T1 (fr)
DE (2) DE3818793A1 (fr)
ES (1) ES2050143T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0726103Y2 (ja) * 1992-06-05 1995-06-14 ニューロング株式会社 把手付袋用異常検出装置
ES2181545B2 (es) * 2000-07-21 2004-02-16 Payper Sa Mesa de centrado de sacos para maquinas ensacad0ras.
JP3833922B2 (ja) 2001-10-23 2006-10-18 富士写真フイルム株式会社 シート材位置決め装置
DE102012018769A1 (de) * 2012-09-24 2014-03-27 Haver & Boecker Ohg Vorrichtung und Verfahren zum Bearbeiten von Sackstapeln
ES2527782B1 (es) * 2013-07-29 2015-08-10 Payper, S.A. Mesa de centrado de sacos preconfeccionados, y procedimiento de centrado de dichos sacos

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821273C2 (de) * 1978-05-16 1985-07-25 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zum Anhängen von Großsäcken an den Fülltrichter einer Sackfüllvorrichtung
DE3527875C1 (de) * 1985-02-25 1986-10-30 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zum Ausrichten eines zu befuellenden Sackes
IT1192822B (it) * 1985-07-11 1988-05-12 Kureha Chemical Ind Co Ltd Impianto automatico di riempimento e di confezionamento

Also Published As

Publication number Publication date
EP0344363A1 (fr) 1989-12-06
DE3818793A1 (de) 1989-12-07
ATE101569T1 (de) 1994-03-15
DE3887877D1 (de) 1994-03-24
ES2050143T3 (es) 1994-05-16

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