EP3148788B1 - Dispositif et procédé pour former un fond ouvert sur un corps de sac - Google Patents

Dispositif et procédé pour former un fond ouvert sur un corps de sac Download PDF

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Publication number
EP3148788B1
EP3148788B1 EP15731827.0A EP15731827A EP3148788B1 EP 3148788 B1 EP3148788 B1 EP 3148788B1 EP 15731827 A EP15731827 A EP 15731827A EP 3148788 B1 EP3148788 B1 EP 3148788B1
Authority
EP
European Patent Office
Prior art keywords
wedge
bag body
tubular bag
open end
transport direction
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.)
Active
Application number
EP15731827.0A
Other languages
German (de)
English (en)
Other versions
EP3148788A1 (fr
Inventor
Hans Peter Gerber
Andreas KOHLFÜRST
Herwig Worff
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.)
Lohia Corp Ltd
Original Assignee
Lohia Corp Ltd
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
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Publication of EP3148788A1 publication Critical patent/EP3148788A1/fr
Application granted granted Critical
Publication of EP3148788B1 publication Critical patent/EP3148788B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/003—Opening or distending bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/04—Feeding sheets or blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0014—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/56—Folding sheets, blanks or webs by rotary members co-operating with blades

Definitions

  • the invention relates to a device for forming a bottom opening between bag sections at the open end region of a tubular bag body, with a transport device for transporting the bag body in a transport direction transversely to its longitudinal extent, and with opening means for forming the bottom opening between the bag sections at the open end region of the tubular bag body wherein the opening means comprises at least one expansion element rotatable about a rotation axis, which is insertable at the rotation between the bag sections at the open end region of the tubular bag body.
  • the invention further relates to a method for forming a bottom opening between bag sections at the open end region of a tubular bag body, wherein the bag body is transported transversely to its longitudinal extent in a transport direction and during transport a spreading element rotating about an axis of rotation between the bag sections at the open end region of the tubular bag body is introduced.
  • the known design has the disadvantage that the spreading of the hose end takes place over a relatively small distance over steep wedge surfaces. This may cause malfunction.
  • DE 1 611 701 a device for opening the ends of transversely conveyed flat hose pieces in the manufacture of the cross bottoms of sacks and bags in soil making machines.
  • tube sections are guided past various processing stations by means of a circulating gripper chain in a transverse position.
  • a stationary suction box pair is provided, which has Saugloch Herbertn.
  • the suction boxes are connected via pipes to a vacuum pump.
  • the suction box are arranged diverging only a few millimeters in the transport direction.
  • the known design is not intended and suitable to allow the penetration of a spreading disc or the like between the tube layers.
  • the DE 2232165 A1 describes a device for folding folding box flaps.
  • the US 4,156,336 discloses an apparatus for making envelopes.
  • this embodiment is disadvantageously unreliable, since the sickle-like Bodenlegeorgan can not always ensure a sufficient bottom opening. Therefore, malfunctions can occur in the prior art, which can lead to operational failures. In addition, the storage of Bodenlegeorgans is comparatively expensive.
  • the object of the present invention is to provide a device for forming a bottom opening, as stated at the beginning, which alleviates or eliminates the disadvantages of the prior art. Accordingly, the invention is the one hand to the goal of generating the bottom openings with high precision and reliability in continuous operation, the structural complexity of the device should be kept as low as possible. In addition, the maintenance effort should be reduced. Furthermore, a high production speed is to be made possible.
  • the rotatable expansion element has a wedge element with at least one wedge surface rising counter to the direction of rotation, with which the sack sections at the open end region of the tubular sack body during its Transports on the transport device are spread apart to form the bottom opening between the bag sections at the open end portion of the tubular bag body.
  • a wedge-shaped expansion element is therefore used according to the invention whose wedge surface increases counter to the direction of rotation, ie from a front end region to a rear end region, for the sack body on the transport device.
  • the rotating wedge element is inserted between the stacked bag sections at the open end region of the tubular bag body, wherein the bag sections are pressed apart by the wedge surface of the wedge element rising to the rear.
  • the opening width of the bottom opening of the tubular bag body is continuously increased.
  • the bottom opening can be formed particularly reliably at the open end region of the tubular bag body. As a result, the service life of the opening device can be substantially increased.
  • the wedge element preferably has a substantially vertical, ie perpendicular to the support surface for the bag body on the transport device extending axis of rotation, when the bag sections are conveyed at the open end of the tubular bag body in a horizontal position through the opening means.
  • the rising wedge surface is disposed at an angle to the horizontal transport plane, wherein the wedge surface extends obliquely upwards or obliquely downward depending on the version from the front end to the rear end.
  • the bag sections may be bent at the open end region of the bag-shaped hose body, for example, by 90 ° from the support surface on the transport device.
  • the wedge element can be arranged to rotate about a horizontal axis of rotation.
  • the wedge surface of the wedge member is arranged rising in a horizontal plane counter to the direction of rotation.
  • the orbital motion of the wedge member is tuned with the transport speed along the transport means such that the bottom opening is formed at the open end portion of the tubular bag body.
  • the system may have at least one wedge element on both sides in each case in order to form the bottom or upper-side opening.
  • the inventive design is characterized by low structural complexity, which can be dispensed with a mechanism for extending a multi-part spreader.
  • the pivot bearing of the spreading tool is particularly simple.
  • it is advantageous that the wedge-shaped expansion element works reliably in continuous operation with high production speed. Conveniently, the maintenance can be kept low.
  • the opening device has at least two spreading elements which follow one another in the transport direction of the tubular bag body.
  • the preceding in the transport direction of the tubular bag body preceding wedge element for producing a first, narrower opening width of the bottom opening and seen in the transport direction following wedge element for producing a second, wider opening width of the bottom opening at the open end portion of the tubular bag body is established.
  • the wedge elements of successive spreading elements have different, in the transport direction of the tubular bag body increasing wedge heights preferably perpendicular to the support surface for the tubular bag body on the transport device.
  • the wedge height of the wedge member i. the maximum extent of the wedge element perpendicular to the support surface for the bag body on the transport device, seen in the transport direction of wedge element to wedge element to.
  • the bottom opening is thereby formed stepwise with structurally simple means.
  • At least one expansion element preferably each expansion element, an adjusting device for adjusting the wedge height of the expansion element.
  • the wedge height adjustable.
  • the adjusting device may, for example, have a longitudinal guide extended in the vertical direction for adjusting two sections or parts of the spreading element relative to one another.
  • locking means may be provided for locking the sections or parts of the expansion element in the adjusted relative position to each other.
  • the wedge element has two wedge surfaces diverging in the transport direction, preferably an upper wedge surface and a lower wedge surface, wherein the upper wedge surface and the lower wedge surface are preferably each in an acute angle to the support surface for the tubular bag body are arranged on the transport device.
  • the upper bag section of the tubular bag body is preferably pushed upwards by means of the upper wedge surface of the wedge element, the lower bag section being pressed down by means of the lower wedge surface of the wedge element.
  • the bottom opening on the tubular bag body can be made particularly reliable.
  • the upper wedge surface and the lower wedge surface are arranged symmetrically with respect to the support surface for the tubular bag body on the transport device.
  • the bag sections of the tubular bag body can be pressed apart uniformly around the center plane formed by the bearing surface on the transport device in order to form the bottom opening at the open end region of the tubular bag body.
  • the spreading elements have overlapping wedge elements during the rotation in the transport direction of the tubular bag body, wherein a wedge element preceding in the transport direction has a recess for the passage of a wedge element following in the direction of transport.
  • the wedge members are temporarily during the orbital movement arranged overlapping, wherein the front end portion of the following in the direction of transport wedge element passes through the recess of the preceding in the transport direction wedge element.
  • the wedge element following in the transport direction can already enter between the sack sections of the tubular sack body before the wedge element which precedes in the transport direction has still exited from the tubular sack body.
  • malfunctions in particular a jam of bag bodies in the opening device, are reliably avoided in this embodiment.
  • a wedge element at a rear end region with respect to the direction of rotation has a holding section for holding a rear region of the tubular bag body with respect to the transport direction during insertion of the wedge surface of the wedge element following in the transport direction into a front region of the tubular bag body.
  • the tubular bag body can thus be held in a state partially opened by means of a wedge element, while the wedge element following in the transport direction moves into the open end region of the tubular bag body in order to broaden the bottom opening.
  • the holding portion of the wedge member has a leading edge, which is arranged substantially at the same height as the viewed in the direction of rotation rear end of the wedge surface.
  • the height here refers to the distance of the leading edge of the support surface for the tubular bag body on the transport device. Due to the leading edge of the wedge element of the open end portion of the tubular Held bag body in a partially opened state when the following wedge member is immersed in the bottom portion of the tubular bag body to gradually increase the opening width of the bottom opening.
  • the wedge element between the wedge surface and the holding portion has the recess for the passage of the following in the transport direction wedge element. Accordingly, the wedge member at the (in the direction of rotation) front end of the wedge surface and the rear end of the holding portion, wherein between the wedge surface and the holding portion, the recess for the release of the rotational movement of the following wedge member is provided.
  • the wedge elements are therefore also arranged partially overlapping by means of recesses in order to prevent the already partially opened end region of the tubular sack body from closing again.
  • the wedge element in the direction of rotation arcuate, in particular circular arc-shaped, curved. Accordingly, the wedge elements are formed arcuately with respect to the support surface for the tubular bag body on the transport device. As a result, the bottom opening can be formed particularly reliable.
  • the wedge element is connected to a drive element coupled to a shaft element whose axis of rotation is preferably arranged substantially perpendicular to the support surface for the bag body on the transport device.
  • the wedge member preferably has a substantially vertical, i. arranged perpendicular to the support surface in the transport device, axis of rotation.
  • the wedge element at least one preferably substantially perpendicular to the support surface for the bag body On the transport device arranged plate member which forms a wedge surface on one end face. Accordingly, the wedge surfaces are preferably formed on the upper or lower edge of a substantially perpendicular to the support surface in the transport device plate member.
  • the wedge element has at least one preferably arranged substantially parallel to the support surface for the bag body on the transport device disc part, which is connected at the outer edge region with the wedge surface having plate member.
  • the opening device has a pre-opening station in the transport direction with which the bag sections can be transferred from a flat superimposed state into a spaced-apart state at the open end region of the tubular bag body are.
  • the bottom opening is released so far that the narrow end of the wedge element can enter between the bag sections at the open end region of the tubular bag body.
  • the pre-opening station has at least one guide element with a guide surface inclined for the transport direction for one of the bag sections at the open end region of the tubular bag body, wherein the guide surface is connected to a suction element for sucking the bag section against the guide surface.
  • the one bag section is conveyed along the open end region of the tubular bag body along the guide surface of the guide element, wherein the one bag section is held in contact with the guide surface by means of the suction element.
  • the one bag section is removed from the other bag section during transport along the pre-opening station, whereby the bag sections at the open end region of the tubular bag body from the flat superimposed state at the entrance of Vorö Stammsstation in the spaced apart, the bottom opening partially releasing state to be transferred.
  • the at least one guide element of the Vorö Maschinensstation seen in the transport direction is arranged overlapping with the at least one expansion element. Accordingly, the wedge member engages between the bag sections of the bag body as soon as the bag sections in the pre-opening station have been pulled apart to substantially the maximum opening width.
  • a continuous transition between the Vorö réellesstation and the formation of the bottom opening can be achieved with the expansion element. Further opening means between the Vorö réellesstation with the inclined guide surface and the spreader are preferably not provided.
  • a drive element is provided for driving the guide element with the guide surface.
  • the guide element has a guide belt connected to the drive element, in particular an endless belt, on which the guide surface for one of the bag sections is formed at the open end region of the tubular bag body. Accordingly, the suction port is entrained with the guide belt when the tubular bag body is transported through the pre-opening station.
  • a drive element can be provided in this embodiment, at least one drive roller on which the guide belt runs. Preferably, two drive rollers are provided, around which an endless belt is wound with the guide surface for the tubular bag body.
  • the Vorö Stammsstation has two guide elements with diverging in the transport direction guide surfaces for the bag sections at the open end portion of the tubular bag body.
  • an upper guide element is provided with an upper guide surface rising upward in the transport direction and a lower guide element with a lower guide surface sloping down in the transport direction.
  • the tubular bag body is angled at the open end region at right angles to the transport plane.
  • the guide elements of the pre-opening station are arranged horizontally, wherein the distance between the guide surfaces increases in the transport direction increasingly.
  • the suction element has at least one suction opening provided on the guide surface for sucking one of the bag sections.
  • the suction opening is connected to negative pressure generating means, with which the associated bag section is sucked to the guide surface.
  • exactly one suction opening is arranged on the guide surface.
  • the bag portion is held during transport through the Vorö Stammsstation by means of a single suction port on the respective guide surface.
  • This design has surprisingly proved to be cheaper than the suction belt used in the prior art with regular Saugloch-2n, with which only a relatively small opening angle could be achieved.
  • This limitation of the prior art is due to the fact that the successive suction openings on opening the bag body over small angles beyond would cause stresses in the bag body, which could solve the bag body of the guide surface.
  • the arrangement of a single suction opening on the guide surface makes it possible for the bag body to be sucked onto the guide surface substantially at points.
  • the guide surface can have a comparatively large angle of inclination with respect to the transport plane, without creating stresses along the main extension of the bag section.
  • the bag body is therefore reliably held on the guide surface. Due to the selective suction of the bag section this can be drawn on the one hand linear and on the other hand along a curve.
  • a vacuum chamber adjacent to the guide surface can be designed accordingly.
  • the endless belt forming the guide element has exactly two intake openings.
  • an endless belt is provided as a guide element, which is provided with exactly two suction openings.
  • the distance between the two suction ports is preferably substantially equal to half the length (i.e., half the circumference) of the endless belt. If, during transport of the bag body through the pre-opening station, one suction opening is arranged on the guide surface, the other suction opening is located on the side of the endless belt facing away from the bag body.
  • one intake opening is active while the other intake opening is inactive.
  • both intake ports may be inactive. This may be the case in particular when both intake openings are in the region of drive rollers which drive the endless belt.
  • the pre-opening station has at least one vacuum generating unit with a vacuum chamber adjacent to the guide surface of the guide member with the suction port.
  • the vacuum chamber is preferably arranged in a housing within the guide element, which preferably has an endless belt.
  • the vacuum chamber is connected via a suction line with the negative pressure generating means.
  • the suction port On the other side of the vacuum chamber of the endless belt is passed, which has the suction port. This will the associated bag section applied to the guide surface of the endless belt.
  • the object underlying the invention is also achieved by a method of the initially mentioned type, in which the rotatable expansion element has a wedge element with at least one counter to the direction of rotation rising wedge surface with which the bag sections apart at the open end of the tubular bag body during its transport on the transport device are spread to form the bottom opening between the bag sections at the open end portion of the tubular bag body.
  • Fig. 1a shows a part of a plant 1 for the production of sacks, wherein a material web, in particular of a fabric material, is processed in various stations to produce Kreuzêt- or Kreuzêtventilsburgen.
  • the system 1 has a separating device (not shown) in order to separate the material web into tubular bag bodies 2.
  • the tubular bag body 2 consist of two superimposed bag sections 2 ', 2 ", wherein each bag section 2', 2" can be constructed of several layers of different material.
  • the tubular bag bodies 2 are transferred to a transport device 3.
  • the transport device 3 be the bag body 2 successively on a substantially horizontal support surface 4 of the transport device 3 in a flat state in the transport direction 5 transversely to its in Fig. 2 be shown schematically longitudinal axis 6 promoted.
  • the transport device 3 is connected to an opening device 7 for forming a bottom opening 8 between the bag sections 2 ', 2 "at the open end region 9 of the tubular bag body 2.
  • the opening device 7 has a pre-opening station 23, with which the bag sections 2' , 2 "at the open end portion 8 of the tubular bag body 9 from a flat superimposed state in a spaced-apart state can be transferred.
  • endless belts are provided as guide elements 24, 25, which are driven by drive rollers 24 ", 24" .
  • the guide elements 24, 25 are each connected to a suction element 26 for sucking in the associated bag section 2 ', 2 ".
  • the suction elements 26 each have at least one suction opening 26 'on the guide surface 24', 25 'of the endless belt.
  • each endless belt has exactly two intake openings 26 '(cf. Fig. 1b ).
  • the Vorö Samuelsstation 23 each have a vacuum generating unit 27 for each guide member 24, 25.
  • the negative pressure generating units 27 each have a vacuum chamber 27 'which extends adjacent to the guide surface 24', 25 'of the upper 24 and lower guide member 25.
  • the vacuum chamber 27 ' is provided in a housing 27 "which is arranged inside the guide element 24, 25.
  • the vacuum chamber 27 ' is connected via an intake line 27'" (not shown) negative pressure generating means, such as a Vacuum pump, connected.
  • the opening means 7 in the transport direction 5 after the Vorö Stammsstation 23 a plurality of spreading elements 10, which are each rotatably mounted about a vertical axis of rotation 11.
  • the bottom opening 8 of the tubular bag body 2 is sufficiently opened by the pre-opening station 23 that the spreading elements 10 can penetrate between the bag sections 2 ', 2 "at the open end region 9 of the tubular bag body 2.
  • the spreading elements 10 travel between the bag sections 2'. , 2 "at the open end portion 9 of the tubular bag body 2, wherein the bottom opening 8 is formed.
  • the opening device 7 follows in the transport direction 5 a bottom folding station 28, in which the geometry of the opening is brought into a correct, right-angled position with the aid of finger elements 29. Thereafter, the tubular bag body 2 can be processed in a conventional manner to the finished bags.
  • the spreading elements 10 are shown at various stages in the formation of the bottom opening 8.
  • the tubular bag body 2 can in this case in a flat superimposed in a horizontal plane state, as in Fig. 3 to 7 shown to be conveyed through the opening device 7.
  • the floor area can be angled during transport through the opening device 7 (see FIG Fig. 2 ).
  • the tubular bag body 2 is transported straight with partially released bottom opening 8 of the Vorö Stammsstation 23 to the spreading elements 10.
  • the opening width of the bottom opening 8 is gradually increased, so that the bottom opening 8 is completely released after the expansion elements 10.
  • the rotatably mounted spreading elements 10 each have a wedge element 12, on which counter to the direction of rotation 13, ie from the front end region to the rear end region, rising wedge surfaces 14 are formed.
  • the wedge elements 12 with the wedge surfaces 14 push the opposite bag sections 2 ', 2 "at the open end portion 9 of the tubular bag body 2 increasingly apart, whereby the bottom opening 8 between the bag sections 2', 2" on open end portion 9 of the tubular bag body 2 is generated.
  • Each wedge element 12 has an upper wedge surface 14 'for an upper sack section 2' and a lower wedge surface 14 "for a lower sack section 2".
  • the wedge surfaces 14 ', 14 "of the wedge elements 12 are each arranged at an acute angle to the horizontal support surface 4 for the tubular bag body 2 on the transport device 3.
  • the wedge element 12 is connected to a substantially vertical, ie perpendicular to the support surface 4 for the bag body 2 on the transport device 3, arranged shaft member 15 which is rotated by a (not shown) drive in rotary motion.
  • the wedge surfaces 14 are formed on substantially perpendicular plate elements 16.
  • the front wedge element 12 'seen in the transport direction 5 has a single plate element 16.
  • the central wedge element 12 "seen in the transport direction 5 and the rear wedge element 12 '" in the transport direction 5 each have an upper plate part 16' which has the upper wedge surface 14 'on an upper end side and a lower plate part 16 "which The plate elements 16, 16 ', 16 "are curved in a circular arc in plan view corresponding to the direction of rotation 13.
  • the wedge members 12 extend substantially in a horizontal plane Disk parts 17, which are coupled on the one hand with the shaft member 15 and on the other hand, at the outer edge regions, the plate parts 16 with the wedge surfaces 14; 14 ', 14 "wear.
  • the individual expansion elements 10 have wedge elements 12, which have different, increasing in the transport direction 5 of the tubular bag body 2 wedge heights h.
  • the wedge height h is measured here by the distance between the viewed in the direction of rotation 11 rear end of the wedge surface 14 and the support surface 4 for the tubular bag body 2 on the conveyor 3.
  • the opening width b of the bottom opening 8 see. Fig. 6
  • wedge element 12 to wedge element 12 increases.
  • the wedge elements 12 are seen during rotation in the transport direction 5 by means of recesses 18 partially overlapping arranged to achieve a continuous increase in the opening width b of the bottom opening 8.
  • the front wedge element 12 ' seen in the transporting direction 5, has a recess 18' for the passage of the middle wedge element 12 "following in the transporting direction 5.
  • the middle wedge element 12" has a recess 18 "for releasing the rotational movement of the transport direction 5 seen rear wedge element 12 '''on.
  • the front wedge element 12 ' viewed in the transport direction 5, has holding sections 19' which are associated with the upper sack section 2 'and the lower sack section 2 "of the tubular sack body 2. This makes it possible to take over the tubular sack body 2 from the front wedge element 12 'to the central wedge element 12 "be designed reliably.
  • the front wedge element 12 ' as seen in the transport direction 5 mean wedge element 12 "corresponding holding portions 19" in order to accomplish a reliable transfer of the bag body 2 to the rear in the transport direction 5 wedge element 12 '' '.
  • bottom and top for the arrangement of various components, such as the wedge elements are used in the present disclosure by way of example for a preferred operating position, in which the bag sections 2 ', 2 "at the open end portion 9 of the tubular bag body 2 in a
  • the components of the system such as the wedge elements 12, arranged tilted by a corresponding angle.

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  • Supplying Of Containers To The Packaging Station (AREA)
  • Making Paper Articles (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Claims (15)

  1. Dispositif pour réaliser une ouverture de fond (8) entre des portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) d'un corps de sac (2) de forme tubulaire, comprenant un dispositif de transport (3) pour transporter le corps de sac (2) dans une direction de transport (5) transversalement à son étendue longitudinale (6), et comprenant un dispositif d'ouverture (7) pour réaliser l'ouverture de fond (8) entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire, le dispositif d'ouverture (7) présentant au moins un élément d'écartement (10) pouvant tourner autour d'un axe de rotation (11), qui, lors de la rotation, peut être introduit entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire, caractérisé en ce que le dispositif d'ouverture (7) présente au moins deux éléments d'écartement successifs (10) dans la direction de transport (5) du corps de sac de forme tubulaire (2), chaque élément d'écartement rotatif (10) présentant un élément de cale (12 ; 12', 12", 12''') avec au moins une surface de cale (14 ; 14', 14") montant dans le sens opposé au sens de rotation (13), avec laquelle les portions de sac (2', 2") peuvent être écartées l'une de l'autre au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire lors de son transport sur le dispositif de transport (3), afin de réaliser l'ouverture de fond (8) entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire et en ce que les éléments de cale (12 ; 12', 12", 12''') d'éléments d'écartement successifs (10) présentent différentes hauteurs de cale (h) augmentant dans la direction de transport (5) du corps de sac (2) de forme tubulaire.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément de cale (12) présente deux surfaces de cale s'étendant à l'écart l'une de l'autre dans la direction de transport (5), de préférence une surface de cale supérieure (14') et une surface de cale inférieure (14"), la surface de cale supérieure (14') et la surface de cale inférieure (14") étant disposées de préférence à chaque fois suivant un angle aigu par rapport à la surface d'appui (4) pour le corps de sac (2) de forme tubulaire sur le dispositif de transport (3).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les éléments d'écartement (10), lors de la rotation dans la direction de transport (5) du corps de sac (2) de forme tubulaire, présentent des éléments de cale se chevauchant (12 ; 12', 12", 12'''), un élément de cale (12 ; 12', 12") en avant dans la direction de transport présentant un évidement (18) pour le passage d'un élément de cale suivant (12 ; 12", 12''') dans la direction de transport (5).
  4. Dispositif selon la revendication 3, caractérisé en ce qu'exactement trois éléments d'écartement (10) sont prévus, lesquels présentent, lors de la rotation dans la direction de transport (5), des éléments de cale se chevauchant (12 ; 12', 12", 12''') pour l'introduction entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire.
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'un élément de cale (12 ; 12', 12'', 12''') présente, au niveau d'une région d'extrémité arrière par rapport au sens de rotation (13), une portion de retenue (19 ; 19', 19") pour retenir une région (20), arrière par rapport à la direction de transport (5), du corps de sac (2) de forme tubulaire lors de l'introduction de la surface de cale (14) de l'élément de cale (12 ; 12", 12''') suivant dans la direction de transport (5) dans une région avant (21) du corps de sac (2) de forme tubulaire.
  6. Dispositif selon la revendication 5, caractérisé en ce que la portion de retenue (19 ; 19', 19") de l'élément de cale (12 ; 12', 12", 12''') présente une arête de guidage (22) qui est disposée essentiellement à la même hauteur que l'extrémité arrière, vue dans la direction de rotation (13), de la surface de cale (14 ; 14', 14").
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que l'élément de cale (12 ; 12', 12", 12''') présente, entre la surface de cale (14 ; 14', 14") et la portion de retenue (19 ; 19', 19"), l'évidement (18) pour le passage de l'élément de cale (12 ; 12", 12''') suivant dans la direction de transport (5).
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'élément de cale (12 ; 12', 12'', 12''') est courbé dans la direction de rotation (13) en forme d'arc, notamment en forme d'arc de cercle.
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'élément de cale (12 ; 12', 12'', 12''') est connecté à un élément d'arbre (15) accouplé à un entraînement, dont l'axe de rotation (11) est disposé de préférence essentiellement perpendiculairement à la surface d'appui (4) pour le corps de sac (2) sur le dispositif de transport (3).
  10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'élément de cale (12 ; 12', 12'', 12''') présente au moins une partie de plaque (16 ; 16', 16") disposée de préférence essentiellement perpendiculaire à la surface d'appui (4) pour le corps de sac (2) sur le dispositif de transport (3), qui constitue, au niveau d'un côté frontal, une surface de cale (14 ; 14', 14"), l'élément de cale (12 ; 12', 12", 12''') présentant de préférence au moins une partie de disque (17) disposée de préférence essentiellement parallèlement à la surface d'appui (4) pour le corps de sac (2) sur le dispositif de transport (3), qui est connectée au niveau de la région de bord extérieure à la partie de plaque (16) présentant la surface de cale (14, 14', 14").
  11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le dispositif d'ouverture (7) présente un poste de pré-ouverture (23) avec lequel les portions de sac (2', 2") peuvent être transférées d'un état situé à plat les unes sur les autres dans un état espacé les unes des autres au niveau de la région d'extrémité ouverte (9) du corps de sac (2).
  12. Dispositif selon la revendication 11, caractérisé en ce que le poste de pré-ouverture (23) présente au moins un élément de guidage (24, 25) avec une surface de guidage (24', 25') inclinée par rapport à la direction de transport (5) pour l'une des portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire, la surface de guidage (24', 25') étant connectée à un élément d'aspiration (26) pour aspirer la portion de sac (2', 2") au niveau de la surface de guidage (24', 25'), de préférence un élément d'entraînement (24", 24''') étant prévu pour entraîner l'élément de guidage (24, 25) avec la surface de guidage (24', 25'), de préférence l'élément de guidage (24, 25) présentant une courroie de guidage connectée à l'élément d'entraînement (24", 24'''), en particulier une courroie sans fin, au niveau de laquelle est réalisée la surface de guidage (24', 25') pour l'une des portions de sac (2', 2") au niveau de la région d'extrémité (9) du corps de sac (2) de forme tubulaire.
  13. Dispositif selon la revendication 12, caractérisé en ce que le poste de pré-ouverture (23) présente deux éléments de guidage (24, 25) avec des surfaces de guidage (24', 25') pour les portions de sac (2', 2") s'écartant l'une de l'autre dans la direction de transport (5) au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire.
  14. Dispositif selon la revendication 12 ou 13, caractérisé en ce que l'élément d'aspiration (26) présente au moins une ouverture d'aspiration (26') prévue au niveau de la surface de guidage (24', 25') pour aspirer l'une des portions de sac (2', 2"), le poste de pré-ouverture (23) présentant de préférence au moins une unité de génération de dépression (27) avec une chambre à dépression (27') adjacente à la surface de guidage (24', 25') de l'élément de guidage (24, 25) avec l'ouverture d'aspiration (26).
  15. Procédé pour réaliser une ouverture de fond (8) entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) d'un corps de sac (2) de forme tubulaire, le corps de sac (2) étant transporté dans une direction de transport (5) transversalement à son étendue longitudinale (2a) et, pendant le transport, un élément d'écartement (10) tournant autour d'un axe de rotation (11) étant introduit entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire, caractérisé en ce que le dispositif d'ouverture (7) présente au moins deux éléments d'écartement (10) successifs dans la direction de transport (5) du corps de sac (2) de forme tubulaire, chaque élément d'écartement rotatif (10) présentant un élément de cale (12 ; 12', 12", 12''') avec au moins une surface de cale (14 ; 14', 14") montant dans le sens opposé au sens de rotation (13), les éléments de cale (12 ; 12', 12", 12''') d'éléments d'écartement successifs (10) présentant différentes hauteurs de cale (h) augmentant dans la direction de transport (5) du corps de sac (2) de forme tubulaire, les portions de sac (2', 2") étant écartées l'une de l'autre au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire pendant son transport sur le dispositif de transport (3) avec les surfaces de cale (14 ; 14', 14") des éléments de cale (12 ; 12', 12", 12'''), afin de réaliser l'ouverture de fond (8) entre les portions de sac (2', 2") au niveau de la région d'extrémité ouverte (9) du corps de sac (2) de forme tubulaire.
EP15731827.0A 2014-05-20 2015-05-20 Dispositif et procédé pour former un fond ouvert sur un corps de sac Active EP3148788B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50354/2014A AT515831B1 (de) 2014-05-20 2014-05-20 Vorrichtung und Verfahren zum Ausbilden einer Bodenöffnung
PCT/AT2015/050127 WO2015176094A1 (fr) 2014-05-20 2015-05-20 Dispositif et procédé de formation d'une ouverture de fond dans un corps de sac

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EP3148788A1 EP3148788A1 (fr) 2017-04-05
EP3148788B1 true EP3148788B1 (fr) 2017-10-18

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CN (1) CN106660295B (fr)
AT (1) AT515831B1 (fr)
BR (1) BR112016026891B1 (fr)
TW (1) TWI640420B (fr)
WO (1) WO2015176094A1 (fr)

Cited By (1)

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EP4149748A4 (fr) * 2020-05-11 2024-06-19 Lohia Corp Ltd Appareil et procédé destinés à l'ouverture des extrémités de pièces de bande tubulaires pour fabriquer des sacs à fond plat

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CN110281583A (zh) * 2019-07-24 2019-09-27 浙江正信机械有限公司 用于无纺布立体袋制袋机的底部折袋机构
CN112722463B (zh) * 2021-03-01 2023-04-07 广东宏川环宇智能装备有限公司 高速包装机的四边封装置

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DE1611701B1 (de) * 1967-09-01 1971-10-07 Windmoeller & Hoelscher Verfahren und Vorrichtung zum OEffnen der Enden quergefoerderter flachliegender Schlauchstuecke bei der Herstellung der Kreuzboeden von Saecken und Beuteln in Bodenmachermaschinen
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IT1068052B (it) * 1976-12-13 1985-03-21 Azionaria Costruzioni Acma Spa Macchina per la formazione ed il riempimento di buste
US5279095A (en) * 1990-08-22 1994-01-18 Sig Schweizerische Industrie-Gesellschaft Apparatus for spreading open flat bags
AT406755B (de) 1998-10-05 2000-08-25 Starlinger & Co Gmbh Vorrichtung zum öffnen von schlauchförmigen sackkörpern
EP2441574B1 (fr) 2010-10-14 2013-05-15 Starlinger & Co Gesellschaft m.b.H. Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sachets tubulaires

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* Cited by examiner, † Cited by third party
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EP4149748A4 (fr) * 2020-05-11 2024-06-19 Lohia Corp Ltd Appareil et procédé destinés à l'ouverture des extrémités de pièces de bande tubulaires pour fabriquer des sacs à fond plat

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Publication number Publication date
AT515831B1 (de) 2016-07-15
TW201600325A (zh) 2016-01-01
TWI640420B (zh) 2018-11-11
CN106660295A (zh) 2017-05-10
WO2015176094A1 (fr) 2015-11-26
AT515831A1 (de) 2015-12-15
CN106660295B (zh) 2019-01-29
BR112016026891B1 (pt) 2021-02-23
EP3148788A1 (fr) 2017-04-05

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