EP2337678B1 - Device and method for opening ends of hose pieces to form open bottom squares - Google Patents

Device and method for opening ends of hose pieces to form open bottom squares Download PDF

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Publication number
EP2337678B1
EP2337678B1 EP09780854.7A EP09780854A EP2337678B1 EP 2337678 B1 EP2337678 B1 EP 2337678B1 EP 09780854 A EP09780854 A EP 09780854A EP 2337678 B1 EP2337678 B1 EP 2337678B1
Authority
EP
European Patent Office
Prior art keywords
opening
moving
tube piece
extension
movable
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.)
Not-in-force
Application number
EP09780854.7A
Other languages
German (de)
French (fr)
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EP2337678A1 (en
Inventor
Klaus Ullmann
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.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP2337678A1 publication Critical patent/EP2337678A1/en
Application granted granted Critical
Publication of EP2337678B1 publication Critical patent/EP2337678B1/en
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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
    • 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
    • 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
    • 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
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B31B2160/102—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents obtained from essentially rectangular 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
    • B31B2160/20—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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/76—Opening and distending flattened articles
    • B31B50/78—Mechanically

Definitions

  • a previously separated piece of tubing is guided transversely to its longitudinal axis, that is perpendicular to the extension axis of the piece of tubing, by means of a suitable means of transport (for example double belt conveyor) to a pre-breaking station.
  • a suitable means of transport for example double belt conveyor
  • a forming die perpendicular to the transport direction of the hose pieces, lowered onto the hose pieces.
  • the corner folds of the opened bottom of the sack, which is located in the subsequent bottom opening station, are later located on the fold edge created is formed.
  • the upper wall of the hose piece which may consist of several layers of material, is folded back onto itself along the folded edge.
  • a valve is placed on the open bottom on a bottom opening in the valve dispensing station.
  • the bag can later be filled via a suitable filling member.
  • the bottom opening of the bag is folded, so that subsequently in the ground cover sheet station by welding or other joining methods such as bonding the bottom opening thereof with a bottom cover sheet of the bag is completed.
  • An apparatus for producing sacks according to the patent application DE 195 02 251 A1 shows a bottom opening device in which a designed as a slider means for opening the bottom squares is provided. This slide is moved to a raised position and at the same time extended into the tube piece plane in order to fold over the upper wall of a piece of tubing along the fold line on itself. Subsequently, the slider is lowered in the extended position to press the wall, and then retracted again.
  • the DE 912 045 discloses a Bodenlegevorraum for cross bottom bag machines, in which a sickle-like Bodenlegeorgan of a drive, which consists of the machine drive and two gears is being driven.
  • This Bodenlegeorgan which can be referred to as means for opening in the sense of the present patent application moves at least partially in the transport direction and in the extension direction of the hose pieces.
  • the gears and the machine drive can be considered as a first means of moving.
  • the sickle-like Bodenlegeorgan touches the hose piece only at certain points, so that pieces of hose, especially if they include tissue plastic tapes are often not opened safely.
  • the object of the present invention is therefore to propose an apparatus for opening ends of hose pieces to open bottom squares, which reduces the disadvantages of the prior art. According to the invention this object is solved by the features of the characterizing parts of claims 1 and 7. Accordingly, it is provided that the means for opening on a carriage (16) is mounted, which (16) is movable on the coupling element.
  • the pieces of tubing are fed cyclically to the individual processing stations.
  • This standstill-free operation is made possible in that the means for opening the bottom squares during the bottom opening process is also moved in the conveying direction of the hose pieces.
  • the invention it is therefore not necessary to stop the pieces of hose to open the hose piece ends. Therefore, a large number of pieces of tubing can be processed per period of time.
  • a first means for moving is provided, with which the means for opening in the transport direction of the hose pieces or in the transport direction of the hose pieces and in the extension direction of the hose pieces is movable.
  • the means for opening by means of the first means for movement is at least temporarily moved at the same speed and the same direction as the piece of hose whose ends are to be opened.
  • the means for opening must now be moved in the extension direction of the hose pieces, which will be described in more detail below.
  • the second alternative is mainly intended to a rotating component which is rotatable about a rotation axis.
  • This axis of rotation advantageously has a component which is directed orthogonal to the plane which is spanned by the tube piece.
  • the rotation axis is aligned completely orthogonal to this plane.
  • the rotating component can now carry the means for opening. During rotation, care must be taken that the movement in the transport direction of the hose pieces is adapted to the movement of the hose pieces.
  • the first means for moving can be powered by a drive with the necessary drive power.
  • This drive can be a single drive, which can even act on the means for moving at both ends of the hose piece. There may be two for this purpose be provided separate drives. Another possibility is that the required drive torque is removed from the central main drive of the bag making device.
  • the first means for moving can be configured in various ways.
  • a driven wheel for example a toothed wheel
  • drives an endless, revolving drive means such as a link chain.
  • a support member may be arranged, which carries the means for opening.
  • Such a support element can also be arranged linearly displaceable on a rail system and driven by a suitable drive.
  • Such a drive may be a linear motor capable of rapidly moving a component back and forth between two positions, with little wear due to the use of only a few mechanical elements such as gears.
  • a second means for moving is provided, with which the means for opening in the extension direction is movable. This can be arranged on or on any kind of first means for moving.
  • the second means may cause the movement of the means for opening in the longitudinal direction of the length of hose.
  • a second means may be provided for moving, for example, to overlay the movement of the first means for moving a further movement in the longitudinal direction of the hose pieces. This makes it possible to advance the means for opening sufficiently far to safely open the end of the hose piece.
  • the second means for moving may be a separate drive, for example a motor drive.
  • a mechanical power transmission This includes, for example, a lever mechanism, which consists of several lever arms connected by means of rotary joints, which are suitably arranged relative to one another. A lever is thereby supplied by the first means for moving with a torque or with a force. The lever mechanism can thus displace the means for opening relative to the first means for moving.
  • the means for opening may, for example, be movable on guide means such as rails relative to a support element to which such a guide means can be attached, thus performing a movement in the direction of the longitudinal axis of the hose pieces.
  • curve guides are conceivable that move the means for opening and are driven by the first means for moving.
  • a drive is generally also a reciprocating into consideration, which can move the means for opening from an initial position to an end position.
  • a reciprocating piston which is quite inexpensive, the bottom can be formed relatively quickly.
  • a fixing device a suction conveyor belt or a follower fixing piston is suitable.
  • the at least one means for opening the bottom squares as a flat sheet extending in the extension direction of the tube piece.
  • the plane of the sheet and the hose piece are therefore advantageously - at least almost - parallel.
  • the Fig. 1 schematically shows individual steps for processing a hose, such as a fabric tube, to bags, as done in the sack manufacturing device 1.
  • the tube 2 is fed to the sack manufacturing device 1. This is advantageously done by unwinding the one tube 3 forming tube in a processing device 4. Subsequently, the tube 2 undergoes the so-called opening in the opening station 5.
  • the fabric tube is guided around an inner tool around which separates the two walls, so that the walls, if they were glued together in one of the manufacturing steps of the tube, separate. Only with separate walls can it be ensured that the following production steps can be carried out properly. Afterwards, the separate walls (material layers) of the hose are put back on top of each other.
  • the tube is then fed to the cross-cutting device 6, which separates the tube into individual tube pieces 13.
  • both ends of each tube piece 13 are opened and the so-called bottom squares are laid.
  • valve station 9 a valve is placed and secured on one of the two open ends.
  • the open bottoms are now closed in the bottom closing station 10, wherein two tabs are placed on each other and each other permanently, for example by welding, are connected.
  • the conclusion of the actual Sackherstellreaes forms the application of a ground cover sheet on the floors in the cover sheet station 11.
  • the cover sheets can also be welded.
  • the finished bags are then placed on the bag stack 12 and transported away from there on unspecified manner.
  • FIG. 2 shows an elevation of an embodiment of an inventive device for opening ends of hose pieces 13 to open bottom squares 14th
  • a slide plate 15 is provided as a means for opening the bottom squares.
  • the slide plate 15 is slidably mounted on a carriage 16, which 16 on a support 17 in the direction of the arrow z, ie in the direction of extension z of the hose pieces 13, is movable.
  • a Hubkolben- or pneumatic cylinder 21 is provided, the piston is movable in the direction of arrow 23.
  • the carrier 17 is rotatably mounted about pivot bearings 18 at one end of two lever arms 19 about the axes D 1 and D 2 .
  • the other ends of the two lever arms 19 are rotatably mounted about the axes D 3 and D 4 in a frame 30.
  • the pieces of hose are fed to the bottom opening device 8, generally at a uniform speed.
  • the lever arms 19 thereby rotate within the x-z plane at a non-uniform speed.
  • the non-uniform speed - in the direction of the arrow 24 or in the xz plane - is synchronized with a synchronization unit, not described in detail, for example an electric motor 22 with nonuniformity gear, to the extent that the slider along the x-direction (transport direction of the hose pieces 13) as non-uniform rotational movement can also be achieved when the rotor of the electric motor 22 is moved at a non-uniform rotational speed.
  • the tube pieces 13 are transported at a continuous speed with an unillustrated conveying device, such as a needle or magnetic conveyor belt, in the x direction.
  • an unillustrated conveying device such as a needle or magnetic conveyor belt
  • the (lower) wall of the tube piece 13 facing the support table is moved by means of an in the Figures 3 - 5 Fixing device shown fixed on the table.
  • This fixing device may be a suction conveyor belt 27 or a follower fixing piston.
  • the sliding plate 15 by means of the carriage 16 in the propagation direction z - in the plane of the tube pieces 13 - moved and so folded back the upper wall of the tube piece 13 to itself, so that an open bag bottom 14 - a so-called bottom square - is formed.
  • the non-uniform rotational movement of the lever arms 19 ensures that the sliding plate 15, during the folding back of the upper wall of the tube piece 13, moves at substantially the same continuous speed in the x-direction as the tube pieces 13 itself.
  • a uniform folding can be ensured and a symmetrical bottom square 14 are formed.
  • suction pads may additionally be provided which lift the upper wall of the hose pieces 13 before the sliding panel folds back the upper wall onto itself.
  • a pressure roller 20 may be provided which is mounted in the transport direction x of the tube pieces - in the region of the bottom opening 14. By passing the bottom opening through the gap formed by the roller 20 with the table or a counter-roller, folding edges are stabilized or fixed.
  • the sliding plate 15 of the bottom opening device 8 may be inclined at an angle ⁇ to the plane of the table.
  • the sliding plate can be made of a flexible material.
  • the flexible sliding plate can cling to the table and thus exerts a force - with a major component in the y direction - on the wall fold, so that a durable fold is already formed in this step.
  • a pressure roller 20 would not be necessary.
  • both features - one by the angle ⁇ Angled slide plate and a pressure roller 20 - includes, may be advantageous.
  • FIG. 3 shows the view III - III in the Fig. 2 ,
  • a pressure plate 26 can be seen, which forms a horizontal gap with the transport table, not shown.
  • the Andschreibblech 26 not only ensures the pressure of the hose piece in the direction of the table top, but forms with its the end of the hose piece 13 facing edge is a folded edge, along which the bottom is opened. This situation is based on the FIGS. 4 and 5 clear.
  • a suction belt 27 is arranged between the Andschreibblech and the end of the hose piece. This suction belt is provided with air passage openings conveyor belt which runs over a suction box, not shown.
  • This suction box is subjected to a negative pressure, so that the resting on the transport table wall is sucked from the suction box on the air passage openings in the direction of the suction table. This ensures that the lower wall remains when folding back of the upper wall on the transport table.
  • FIG. 4 shows a similar situation the the FIG. 3
  • the slide plate 15 is now fully extended in the direction z. It was the Slider plate 15 is guided above the Andrückbleches 27, so that the upper wall of the hose piece was folded back on itself to form so-called triangular pockets 28 and 29. It is the desired open bottom square 14 was created.
  • both the hose piece 13 was moved in the direction z and the lever arms 19 and 19 'further rotated in the direction of the arrow 24. In this case, the rotational speed when the slide plate 15 was and is in contact with the tube piece 13 has been and is changed so that the speed component in the direction z was always as large and is as the speed of the tube piece.
  • the open bottom square Shortly after leaving the slide plate 15, the open bottom square hits the pressure roller 20, which can form a Anpressspalt with the transport table.
  • the gap may have a fixed, but adjustable by means of an adjustment measure.
  • the role can also press with its own weight on the table. To increase the contact pressure, the role can be made by spring force in addition to the table.
  • the pressure roller 20 may also form a nip instead of the table with another roller or roller.
  • the roll 20 can also be divided into two, the larger Height of the part of the open bottom square can be considered, which was folded back on itself, which rests on two bags walls.
  • the roller 20 may be tempered in order to impress the folds of the open bottom square even better.

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Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Öffnen von Enden von Schlauchstücken zu offenen Bodenquadraten.The invention relates to an apparatus and a method for opening ends of hose pieces to open bottom squares.

Vorrichtungen zum Öffnen von Enden von Schlauchstücken zu offenen Bodenquadraten sind bereits bekannt und Bestandteil von Sackherstellungsvorrichtungen. Hier sind Sackherstellungsvorrichtungen gemeint, die Schlauchstücke aus beliebigen Materialien verarbeiten können. Vorzugsweise werden auf den weiter unten beschriebenen Vorrichtungen Schlauchstücke aus Kunststoff verarbeitet, insbesondere solche, die Gewebe aus gereckten Kunststoffbändchen umfassen.Devices for opening ends of tubing to open bottom squares are already known and are part of sack making devices. Here are meant sack making devices that can handle pieces of tubing made of any materials. Preferably pieces of plastic are processed on the devices described below, in particular those comprising woven fabric of stretched plastic tape.

Im Folgenden wird kurz ein Sackherstellungsprozess nach den Maschinen des Standes der Technik erläutert. Da die Maschinen des Standes der Technik auf der Bedien- und Antriebsseite nahezu gleich aufgebaut sind, um gleichzeitig beide Enden des Schlauchstücks bearbeiten zu können, wird in der folgenden Beschreibung nicht näher auf die verschiedenen Maschinenseiten eingegangen. Ein zuvor vereinzeltes Schlauchstück wird quer seiner Längsachse, also senkrecht zur Erstreckungsachse des Schlauchstückes, mithilfe eines geeigneten Transportmittels (beispielsweise Doppelbandförderer) zu einer Vorbruchstation geführt. Dort wird ein Formstempel, senkrecht zur Transportrichtung der Schlauchstücke, auf die Schlauchstücke abgesenkt. Auf der dabei entstandenen Falzkante befinden sich später die Eckeinschläge des geöffneten Sackbodens, der in der darauf folgenden Bodenöffnungsstation geformt wird. Dazu wird in der Bodenöffnungsstation die obere Wandung des Schlauchstückes, die aus mehreren Materiallagen bestehen kann, entlang der Falzkante auf sich selbst zurückgefaltet.In the following, a bag making process according to the prior art machines will be briefly explained. Since the state-of-the-art machines on the operating and drive side are constructed almost identically in order to be able to work simultaneously on both ends of the hose piece, the following description does not deal in detail with the various sides of the machine. A previously separated piece of tubing is guided transversely to its longitudinal axis, that is perpendicular to the extension axis of the piece of tubing, by means of a suitable means of transport (for example double belt conveyor) to a pre-breaking station. There, a forming die, perpendicular to the transport direction of the hose pieces, lowered onto the hose pieces. The corner folds of the opened bottom of the sack, which is located in the subsequent bottom opening station, are later located on the fold edge created is formed. For this purpose, in the bottom opening station, the upper wall of the hose piece, which may consist of several layers of material, is folded back onto itself along the folded edge.

Anschließend wird auf einer Bodenöffnung in der Ventilzettelstation ein Ventil auf den geöffneten Boden gelegt. Durch dieses Ventil kann später der Sack über ein geeignetes Füllorgan befüllt werden. In der folgenden Zulegestation wird die Bodenöffnung des Sackes zugefaltet, so dass anschließend in der Bodendeckblattstation durch Verschweißen oder andere Fügeverfahren wie Verkleben der Bodenöffnung desselben mit einem Bodendeckblatt der Sack fertig gestellt wird.Subsequently, a valve is placed on the open bottom on a bottom opening in the valve dispensing station. Through this valve, the bag can later be filled via a suitable filling member. In the following Zulegestation the bottom opening of the bag is folded, so that subsequently in the ground cover sheet station by welding or other joining methods such as bonding the bottom opening thereof with a bottom cover sheet of the bag is completed.

Eine Vorrichtung zur Herstellung von Säcken gemäß der Patentanmeldung DE 195 02 251 A1 zeigt eine Bodenöffnungsvorrichtung, bei der ein als Schieber ausgestaltetes Mittel zum Öffnen der Bodenquadrate vorgesehen ist. Dieser Schieber wird in eine angehobene Stellung verbracht und gleichzeitig in die Schlauchstückebene ausgefahren, um die obere Wandung eines Schlauchstückes entlang der Falzlinie auf sich selbst umzuklappen. Anschließend wird der Schieber in der ausgefahrenen Stellung abgesenkt, um die Wandung anzudrücken, und danach wieder eingefahren.An apparatus for producing sacks according to the patent application DE 195 02 251 A1 shows a bottom opening device in which a designed as a slider means for opening the bottom squares is provided. This slide is moved to a raised position and at the same time extended into the tube piece plane in order to fold over the upper wall of a piece of tubing along the fold line on itself. Subsequently, the slider is lowered in the extended position to press the wall, and then retracted again.

Damit der beschriebene Schieber ordnungsgemäß arbeiten kann, ist es notwendig, dass sich das zu öffnende Schlauchstück in Ruhe befindet. Ein zugeführtes Schlauchstück muss also zunächst angehalten werden. Nachdem der Boden geöffnet wurde, muss das Schlauchstück wieder beschleunigt werden, um zur nächsten Bearbeitungsstation verbracht zu werden.In order for the slide described can work properly, it is necessary that the piece of hose to be opened is at rest. A supplied piece of tubing must therefore be stopped first. After the bottom has been opened, the tube piece must be accelerated again to be transported to the next processing station.

Dabei erweist sich allerdings als nachteilig, dass eine Bodenöffnungsvorrichtung gemäß der DE 195 02 251 A1 zu langsam ist. Außerdem ist eine solche Vorrichtung verschleißanfällig.However, it proves to be disadvantageous that a bottom opening device according to the DE 195 02 251 A1 is too slow. In addition, such a device is susceptible to wear.

Die DE 912 045 offenbart eine Bodenlegevorrichtung für Kreuzbodenbeutelmaschinen, bei der eine sichelartiges Bodenlegeorgan von einem Antrieb, der aus dem Maschinenantrieb und zwei Zahnrädern gebildet wird, angetrieben wird. Dieses Bodenlegeorgan, das als Mittel zum Öffnen im Sinne der vorliegenden Patentanmeldung bezeichnet werden kann, bewegt sich zumindest teilweise in Transportrichtung und in Erstreckungsrichtung der Schlauchstücke. Die Zahnräder und der Maschinenantrieb können als erstes Mittel zum Bewegen angesehen werden. Das sichelartige Bodenlegeorgan berührt das Schlauchstück jedoch nur punktuell, so dass Schlauchstücke, insbesondere wenn sie Gewebe aus Kunststoffbändchen umfassen, oft nicht sicher geöffnet werden.The DE 912 045 discloses a Bodenlegevorrichtung for cross bottom bag machines, in which a sickle-like Bodenlegeorgan of a drive, which consists of the machine drive and two gears is being driven. This Bodenlegeorgan, which can be referred to as means for opening in the sense of the present patent application moves at least partially in the transport direction and in the extension direction of the hose pieces. The gears and the machine drive can be considered as a first means of moving. However, the sickle-like Bodenlegeorgan touches the hose piece only at certain points, so that pieces of hose, especially if they include tissue plastic tapes are often not opened safely.

Die Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung zum Öffnen von Enden von Schlauchstücken zu offenen Bodenquadraten vorzuschlagen, die die Nachteile des Standes der Technik verringert. Erfindungsgemäß wird diese Aufgabe durch die Merkmale der kennzeichnenden Teile der Ansprüche 1 und 7 gelöst. Demnach ist vorgesehen, das Mittel zum Öffnen auf einem Schlitten (16) gelagert ist, welcher (16) auf dem Koppelelement bewegbar ist.The object of the present invention is therefore to propose an apparatus for opening ends of hose pieces to open bottom squares, which reduces the disadvantages of the prior art. According to the invention this object is solved by the features of the characterizing parts of claims 1 and 7. Accordingly, it is provided that the means for opening on a carriage (16) is mounted, which (16) is movable on the coupling element.

Bei einigen herkömmlichen Vorrichtungen zur Herstellung von Säcken werden die Schlauchstücke taktweise den einzelnen Bearbeitungsstationen zugeführt. Um Sackherstellungsvorrichtungen schneller zu gestalten ist es vorteilhaft, die Schlauchstücke ohne Unterbrechung, vorzugsweise mit einer gleichmäßigen Geschwindigkeit, zu transportieren. Dieser stillstandsfreie Betrieb wird dadurch ermöglicht, dass das Mittel zum Öffnen der Bodenquadrate während des Bodenöffnungsvorganges auch in Förderrichtung der Schlauchstücke bewegt wird. Mit der Erfindung ist es also nicht notwendig, die Schlauchstücke anzuhalten, um die Schlauchstückenden zu öffnen. Daher kann pro Zeitabschnitt eine große Anzahl an Schlauchstücken verarbeitet werden.In some conventional bag making machines, the pieces of tubing are fed cyclically to the individual processing stations. To make bag making devices faster, it is advantageous to transport the pieces of tubing without interruption, preferably at a uniform speed. This standstill-free operation is made possible in that the means for opening the bottom squares during the bottom opening process is also moved in the conveying direction of the hose pieces. With the invention, it is therefore not necessary to stop the pieces of hose to open the hose piece ends. Therefore, a large number of pieces of tubing can be processed per period of time.

Gemäß der Erfindung ist ein erstes Mittel zum Bewegen vorgesehen, mit welchem das Mittel zum Öffnen in der Transportrichtung der Schlauchstücke oder in der Transportrichtung der Schlauchstücke und in Erstreckungsrichtung der Schlauchstücke bewegbar ist.
In der ersten Alternative dieser Ausgestaltung ist daran gedacht, dass das Mittel zum Öffnen mittels des ersten Mittels zum Bewegung zumindest zeitweise mit gleicher Geschwindigkeit und gleicher Richtung wie das Schlauchstück bewegt wird, dessen Enden zu öffnen sind. Zum tatsächlichen Öffnen des Schlauchstücks muss das Mittel zum Öffnen nun noch in Erstreckungsrichtung der Schlauchstücke bewegt werden, was weiter unten näher beschrieben wird. Bei der zweiten Alternative ist vor allem an ein rotierendes Bauteil gedacht, das um eine Drehachse drehbar ist. Diese Drehachse weist vorteilhafterweise eine Komponente auf, die orthogonal zur Ebene gerichtet ist, die durch das Schlauchstück aufgespannt wird. Beispielsweise ist die Drehachse vollständig orthogonal zu dieser Ebene ausgerichtet. Das rotierende Bauteil kann nun das Mittel zum Öffnen tragen. Bei der Rotation ist darauf zu achten, dass die Bewegung in der Transportrichtung der Schlauchstücke an die Bewegung der Schlauchstücke angepasst wird.According to the invention, a first means for moving is provided, with which the means for opening in the transport direction of the hose pieces or in the transport direction of the hose pieces and in the extension direction of the hose pieces is movable.
In the first alternative of this embodiment, it is contemplated that the means for opening by means of the first means for movement is at least temporarily moved at the same speed and the same direction as the piece of hose whose ends are to be opened. For the actual opening of the hose piece, the means for opening must now be moved in the extension direction of the hose pieces, which will be described in more detail below. In the second alternative is mainly intended to a rotating component which is rotatable about a rotation axis. This axis of rotation advantageously has a component which is directed orthogonal to the plane which is spanned by the tube piece. For example, the rotation axis is aligned completely orthogonal to this plane. The rotating component can now carry the means for opening. During rotation, care must be taken that the movement in the transport direction of the hose pieces is adapted to the movement of the hose pieces.

Das erste Mittel zum Bewegen kann von einem Antrieb mit der notwendigen Antriebsenergie versorgt werden. Dieser Antrieb kann ein einzelner Antrieb sein, der sogar auf die Mittel zum Bewegen an beiden Enden des Schlauchstücks wirken kann. Es können für diesen Zweck aber auch zwei separate Antriebe vorgesehen sein. Eine weitere Möglichkeit ist, dass von dem zentralen Hauptantrieb der Sackherstellungsvorrichtung das benötigte Antriebsdrehmoment abgenommen wird.The first means for moving can be powered by a drive with the necessary drive power. This drive can be a single drive, which can even act on the means for moving at both ends of the hose piece. There may be two for this purpose be provided separate drives. Another possibility is that the required drive torque is removed from the central main drive of the bag making device.

Das erste Mittel zum Bewegen kann auf verschiedene Arten ausgestaltet werden. So ist denkbar, dass ein angetriebenes Rad, beispielsweise ein Zahnrad, ein endloses, umlaufendes Antriebsmittel wie etwa eine Laschenkette antreibt. An dieser Laschenkette kann ein Tragelement angeordnet sein, welches das Mittel zum Öffnen trägt. Ein solches Tragelement kann auch auf einem Schienensystem linear verschiebbar angeordnet und von einem geeigneten Antrieb angetrieben werden. Ein solcher Antrieb kann ein Linearmotor sein, der in der Lage ist, ein Bauteil schnell zwischen zwei Positionen hin und her bewegen zu können, wobei wegen des Einsatzes nur weniger mechanischer Elemente wie Zahnräder lediglich ein geringer Verschleiß auftritt.The first means for moving can be configured in various ways. Thus, it is conceivable that a driven wheel, for example a toothed wheel, drives an endless, revolving drive means, such as a link chain. At this link chain, a support member may be arranged, which carries the means for opening. Such a support element can also be arranged linearly displaceable on a rail system and driven by a suitable drive. Such a drive may be a linear motor capable of rapidly moving a component back and forth between two positions, with little wear due to the use of only a few mechanical elements such as gears.

Weiterhin ist gemäß der Erfindung ein zweites Mittel zum Bewegen vorgesehen, mit welchem das Mittel zum Öffnen in Erstreckungsrichtung bewegbar ist. Dieses kann auf oder an einem wie auch immer gearteten ersten Mittel zum Bewegen angeordnet sein.Furthermore, according to the invention, a second means for moving is provided, with which the means for opening in the extension direction is movable. This can be arranged on or on any kind of first means for moving.

Bewegt sich beispielsweise das erste Mittel zum Bewegen in Transportrichtung, so kann das zweite Mittel die Bewegung des Mittels zum Öffnen in Längsrichtung des Schlauchstücks hervorrufen.For example, when the first means moves to move in the direction of transport, the second means may cause the movement of the means for opening in the longitudinal direction of the length of hose.

Aber auch, wenn das erste Mittel zum Bewegen Bewegungskomponenten sowohl in Transportrichtung der Schlauchstücke als auch In derenBut even if the first means for moving movement components both in the transport direction of the hose pieces and in the

Längsrichtung umfasst, kann ein zweites Mittel zum Bewegen vorgesehen sein, um beispielsweise der Bewegung des ersten Mittels zum Bewegen eine weitere Bewegung in Längsrichtung der Schlauchstücke zu überlagern. Damit ist es möglich, das Mittel zum Öffnen ausreichend weit vorzuschieben, um das Ende des Schlauchstückes sicher zu öffnen.A second means may be provided for moving, for example, to overlay the movement of the first means for moving a further movement in the longitudinal direction of the hose pieces. This makes it possible to advance the means for opening sufficiently far to safely open the end of the hose piece.

Das zweite Mittel zum Bewegen kann ein separater Antrieb sein, beispielsweise ein motorischer Antrieb. Denkbar ist aber auch eine mechanische Kraftübertragung. Darunter fällt beispielsweise ein Hebelgetriebe, welches aus mehreren mittels Drehgelenken verbundenen Hebelarmen besteht, die geeignet zueinander angeordnet sind. Ein Hebel wird dabei von dem ersten Mittel zum Bewegen mit einem Drehmoment oder mit einer Kraft versorgt. Das Hebelgetriebe kann auf diese Weise das Mittel zum Öffnen relativ zu dem ersten Mittel zum Bewegen verschieben. Das Mittel zum Öffnen kann beispielsweise auf Führungsmitteln wie etwa Schienen relativ zu einem Tragelement, an dem ein solches Führungsmittel befestigt sein kann, bewegbar sein und so eine Bewegung in Richtung der Längsachse der Schlauchstücke vollführen. Als weitere mechanische Kraftübertragungsmittel sind Kurvenführungen denkbar, die das Mittel zum Öffnen verschieben und die vom ersten Mittel zum Bewegen angetrieben werden.The second means for moving may be a separate drive, for example a motor drive. It is also conceivable a mechanical power transmission. This includes, for example, a lever mechanism, which consists of several lever arms connected by means of rotary joints, which are suitably arranged relative to one another. A lever is thereby supplied by the first means for moving with a torque or with a force. The lever mechanism can thus displace the means for opening relative to the first means for moving. The means for opening may, for example, be movable on guide means such as rails relative to a support element to which such a guide means can be attached, thus performing a movement in the direction of the longitudinal axis of the hose pieces. As a further mechanical power transmission means curve guides are conceivable that move the means for opening and are driven by the first means for moving.

Als Antrieb kommt generell auch ein Hubkolben in Betracht, der das Mittel zum Öffnen von einer Anfangsposition in eine Endposition verschieben kann. Mittels eines Hubkolbens, der recht preisgünstig ist, kann der Boden vergleichsweise schnell geformt werden.As a drive is generally also a reciprocating into consideration, which can move the means for opening from an initial position to an end position. By means of a reciprocating piston, which is quite inexpensive, the bottom can be formed relatively quickly.

Ein motorischer Antrieb kann auch hier ein Linearmotor sein, der als zweites Mittel zum Bewegen verwendet wird. Mit einem solchen Motor ist es sogar möglich, die Geschwindigkeit des Mittels zum Öffnen während des Öffnungsvorganges zu variieren.A motor drive can here also be a linear motor, which is used as a second means for moving. With such a motor, it is even possible to vary the speed of the opening means during the opening operation.

Damit die obere Wandung des Schlauchstückes auf sich selbst zurückgefaltet werden kann, ist es vorteilhaft die untere Wandung des Schlauchstückes auf dem Transporttisch mit einer Fixiervorrichtung zu fixieren. Als Fixiervorrichtung ist ein Saugförderband oder ein mitlaufender Fixierkolben geeignet.So that the upper wall of the hose piece can be folded back on itself, it is advantageous to the lower wall of the hose piece to fix the transport table with a fixing device. As a fixing a suction conveyor belt or a follower fixing piston is suitable.

Es stellte sich als besonders vorteilhaft heraus, das zumindest eine Mittel zum Öffnen der Bodenquadrate als ein sich in Erstreckungsrichtung des Schlauchstückes erstreckendes flaches Blech auszugestalten. Die Ebene des Bleches und des Schlauchstückes sind demnach vorteilhafterweise - zumindest nahezu - parallel.It turned out to be particularly advantageous to design the at least one means for opening the bottom squares as a flat sheet extending in the extension direction of the tube piece. The plane of the sheet and the hose piece are therefore advantageously - at least almost - parallel.

Wie bereits erwähnt, ist vorteilhafterweise ein Pneumatikzylinder zum Verschieben des Mittels zum Öffnen der Bodenquadrate auf dem Träger in Erstreckungsrichtung der Schlauchstücke vorgesehen.As already mentioned, a pneumatic cylinder for displacing the means for opening the bottom squares on the support in the extension direction of the hose pieces is advantageously provided.

Weitere Ausführungsbeispiele der Erfindung gehen aus der Zeichnung, der zugehörigen gegenständlichen Beschreibung und den Ansprüchen hervor. Die einzelnen Figuren der Zeichnung zeigen:

Fig. 1
Prinzipskizze einer Vorrichtung zur Herstellung von Gewebesäcken
Fig. 2
Aufriss einer erfindungsgemäßen Bodenöffnungsvorrichtung
Fig. 3
Ansicht II-III aus Fig. 2 vor dem Öffnen des Bodens
Fig. 4
Ansicht wie Fig. 3, jedoch während der Bodenöffnung
Fig. 5
Wie Fig. 4, jedoch nach erfolgter Bodenöffnung
Other embodiments of the invention will become apparent from the drawings, the accompanying description and the appended claims. The individual figures of the drawing show:
Fig. 1
Schematic diagram of an apparatus for the production of tissue sacks
Fig. 2
Outline of a floor opening device according to the invention
Fig. 3
View II-III off Fig. 2 before opening the floor
Fig. 4
View like Fig. 3 but during bottom opening
Fig. 5
As Fig. 4 , but after bottom opening

Die Fig. 1 zeigt schematisch einzelne Schritte zur Verarbeitung eines Schlauches, beispielsweise eines Gewebeschlauches, zu Säcken, wie sie in der Sackherstellungsvorrichtung 1 erfolgen.The Fig. 1 schematically shows individual steps for processing a hose, such as a fabric tube, to bags, as done in the sack manufacturing device 1.

Zunächst wird der Schlauch 2 der Sackherstellungsvorrichtung 1 zugeführt. Dies geschieht vorteilhafterweise durch Abwickeln des einen Wickel 3 bildenden Schlauches in einer Abwicklungseinrichtung 4. Anschließend erfährt der Schlauch 2 die so genannte Öffnung in der Öffnungsstation 5. Dabei wird der Gewebeschlauch um ein Innenwerkzeug herum geführt, welches die beiden Wandungen voneinander trennt, so dass sich die Wandungen, falls sie bei einem der Herstellungsschritte des Schlauches miteinander verklebt wurden, trennen. Nur bei getrennten Wandungen kann sichergestellt werden, dass die folgenden Produktionsschritte ordnungsgemäß durchgeführt werden können. Im Anschluss werden die voneinander getrennten Wandungen (Materiallagen) des Schlauches wieder aufeinander gelegt.
Der Schlauch wird nun der Querschneideeinrichtung 6 zugeführt, die den Schlauch in einzelne Schlauchstücke 13 vereinzelt.First, the tube 2 is fed to the sack manufacturing device 1. This is advantageously done by unwinding the one tube 3 forming tube in a processing device 4. Subsequently, the tube 2 undergoes the so-called opening in the opening station 5. The fabric tube is guided around an inner tool around which separates the two walls, so that the walls, if they were glued together in one of the manufacturing steps of the tube, separate. Only with separate walls can it be ensured that the following production steps can be carried out properly. Afterwards, the separate walls (material layers) of the hose are put back on top of each other.
The tube is then fed to the cross-cutting device 6, which separates the tube into individual tube pieces 13.

Anschließend erfolgt eine Änderung der ursprünglichen Transportrichtung z, in der der Schlauch bzw. die Schlauchstücke in Richtung ihrer Längsachsen transportiert wurden, in die neue Transportrichtung x, so dass die Schlauchstücke 13 nun nicht mehr in Richtung z ihrer Schlauchlängsachse, sondern quer hierzu transportiert werden, so dass die Enden der Schlauchstücke zwecks Anformung der Böden seitlich erreichbar sind.Subsequently, a change of the original transport direction z, in which the hose or the hose pieces were transported in the direction of their longitudinal axes, takes place in the new transport direction x, so that the hose pieces 13 are no longer transported in the direction z of their hose longitudinal axis, but transversely thereto, so that the ends of the hose pieces are laterally accessible for the purpose of molding the floors.

In der folgenden Station, der Bodenöffnungsstation 8, werden beide Enden eines jeden Schlauchstücks 13 geöffnet und die so genannten Bodenquadrate gelegt. In der darauf folgenden Ventilstation 9 wird auf eines der beiden offenen Enden ein Ventil aufgelegt und befestigt. Die offenen Böden werden nun in der Bodenschließstation 10 geschlossen, wobei zwei Laschen aufeinander gelegt werden und miteinander dauerhaft, beispielsweise durch verschweißen, verbunden werden. Den Abschluss des eigentlichen Sackherstellprozesses bildet das Aufbringen je eines Bodendeckblattes auf die Böden in der Deckblattstation 11. Dazu können die Deckblätter ebenfalls aufgeschweißt werden. Die fertigen Säcke werden anschließend auf dem Sackstapel 12 abgelegt und von dort auf nicht näher beschriebene Weise abtransportiert.In the following station, the bottom opening station 8, both ends of each tube piece 13 are opened and the so-called bottom squares are laid. In the following valve station 9, a valve is placed and secured on one of the two open ends. The open bottoms are now closed in the bottom closing station 10, wherein two tabs are placed on each other and each other permanently, for example by welding, are connected. The conclusion of the actual Sackherstellprozesses forms the application of a ground cover sheet on the floors in the cover sheet station 11. For this purpose, the cover sheets can also be welded. The finished bags are then placed on the bag stack 12 and transported away from there on unspecified manner.

Die Figur 2 zeigt einen Aufriss einer Ausführungsform einer erfindungsgemäßen Vorrichtung zum Öffnen von Enden von Schlauchstücken 13 zu offenen Bodenquadraten 14.The FIG. 2 shows an elevation of an embodiment of an inventive device for opening ends of hose pieces 13 to open bottom squares 14th

Als Mittel zum Öffnen der Bodenquadrate ist ein Schieberblech 15 vorgesehen. Das Schieberblech 15 ist auf einem Schlitten 16 verschiebbar gelagert, welcher 16 auf einem Träger 17 in Richtung des Pfeils z, also in Erstreckungsrichtung z der Schlauchstücke 13, bewegbar ist. Zum Verschieben des Bleches 15 ist ein Hubkolben- oder Pneumatikzylinder 21 vorgesehen, dessen Kolben in Richtung des Pfeils 23 bewegbar ist. Der Träger 17 ist über Drehlager 18 an jeweils einem Ende von zwei Hebelarmen 19 um die Achsen D1 und D2 drehbar gelagert. Die anderen Enden der zwei Hebelarme 19 sind um die Achsen D3 und D4 drehbar in einem Gestell 30 gelagert.As a means for opening the bottom squares a slide plate 15 is provided. The slide plate 15 is slidably mounted on a carriage 16, which 16 on a support 17 in the direction of the arrow z, ie in the direction of extension z of the hose pieces 13, is movable. To move the sheet 15 is a Hubkolben- or pneumatic cylinder 21 is provided, the piston is movable in the direction of arrow 23. The carrier 17 is rotatably mounted about pivot bearings 18 at one end of two lever arms 19 about the axes D 1 and D 2 . The other ends of the two lever arms 19 are rotatably mounted about the axes D 3 and D 4 in a frame 30.

Im kontinuierlichen Betrieb der Sackherstellungsmaschine werden die Schlauchstücke - in der Regel mit gleichmäßiger Geschwindigkeit - der Bodenöffnungsvorrichtung 8 zugeführt. Die Hebelarme 19 drehen sich dabei innerhalb der x-z-Ebene mit einer ungleichförmigen Geschwindigkeit. Die ungleichförmige Geschwindigkeit - in Richtung des Pfeils 24 bzw. in der x-z-Ebene - wird mit einer nicht näher beschriebenen Synchronisationseinheit, beispielsweise einem Elektromotor 22 mit Ungleichförmigkeitsgetriebe, dahingehend synchronisiert, dass der Schieber sich entlang der x-Richtung (Transportrichtung der Schlauchstücke 13) möglichst mit der gleichen Geschwindigkeit bewegt wie die Schlauchstücke 13. Eine ungleichförmige Drehbewegung kann auch erzielt werden, wenn der Rotor des Elektromotors 22 mit einer ungleichförmigen Rotationsgeschwindigkeit bewegt wird.In continuous operation of the sack making machine, the pieces of hose are fed to the bottom opening device 8, generally at a uniform speed. The lever arms 19 thereby rotate within the x-z plane at a non-uniform speed. The non-uniform speed - in the direction of the arrow 24 or in the xz plane - is synchronized with a synchronization unit, not described in detail, for example an electric motor 22 with nonuniformity gear, to the extent that the slider along the x-direction (transport direction of the hose pieces 13) as non-uniform rotational movement can also be achieved when the rotor of the electric motor 22 is moved at a non-uniform rotational speed.

Während der Drehbewegung der Hebelarme 19 wird das Schiebeblech 15 auf dem Träger 17 abwechselnd - in Ausbreitungsrichtung z der Schlauchstücke 13 - hin und her bewegt.During the rotational movement of the lever arms 19, the sliding plate 15 is moved alternately on the carrier 17 - in the direction of propagation z of the tube pieces 13 - back and forth.

Nachdem das Schlauchstück 13 die Transportrichtungsänderungsvorrichtung 7 passiert hat, werden die Schlauchstücke 13 mit einer kontinuierlichen Geschwindigkeit mit einer nicht dargestellten Fördervorrichtung, beispielsweise einem Nadel- oder Magnetförderband, in x-Richtung transportiert. Wenn ein Schlauchstück 13 die Bodenöffnungsvorrichtung 8 erreicht, wird die dem Auflagetisch zugewandte (untere) Wandung des Schlauchstückes 13 mit Hilfe einer in den Figuren 3 - 5 dargestellten Fixiervorrichtung auf dem Tisch fixiert. Diese Fixiervorrichtung kann ein Saugförderband 27 oder ein mitlaufender Fixierkolben sein.After the tube piece 13 has passed through the transport direction changing device 7, the tube pieces 13 are transported at a continuous speed with an unillustrated conveying device, such as a needle or magnetic conveyor belt, in the x direction. When a piece of tubing 13 reaches the bottom opening device 8, the (lower) wall of the tube piece 13 facing the support table is moved by means of an in the Figures 3 - 5 Fixing device shown fixed on the table. This fixing device may be a suction conveyor belt 27 or a follower fixing piston.

Anschließend wird das Schiebeblech 15 mithilfe des Schlittens 16 in Ausbreitungsrichtung z - in der Ebene der Schlauchstücke 13 - verfahren und so die obere Wandung des Schlauchstückes 13 auf sich selbst zurückgefaltet, so dass ein offener Sackboden 14 - ein so genanntes Bodenquadrat - gebildet wird. Die ungleichförmige Drehbewegung der Hebelarme 19 sorgt dafür, dass sich das Schiebeblech 15, während des Zurückfaltens der oberen Wandung des Schlauchstückes 13, mit im Wesentlichen derselben kontinuierlichen Geschwindigkeit in x-Richtung bewegt wie die Schlauchstücke 13 selbst. So kann eine gleichmäßige Faltung gewährleistet und ein symmetrisches Bodenquadrat 14 gebildet werden.Subsequently, the sliding plate 15 by means of the carriage 16 in the propagation direction z - in the plane of the tube pieces 13 - moved and so folded back the upper wall of the tube piece 13 to itself, so that an open bag bottom 14 - a so-called bottom square - is formed. The non-uniform rotational movement of the lever arms 19 ensures that the sliding plate 15, during the folding back of the upper wall of the tube piece 13, moves at substantially the same continuous speed in the x-direction as the tube pieces 13 itself. Thus, a uniform folding can be ensured and a symmetrical bottom square 14 are formed.

In einer weiteren Ausführungsform der Bodenöffnungsvorrichtung 8 können zusätzlich Sauger vorgesehen sein, die die obere Wandung der Schlauchstücke 13 anheben, bevor das Schiebeblech die obere Wandung auf sich selbst zurückfaltet.In a further embodiment of the floor opening device 8, suction pads may additionally be provided which lift the upper wall of the hose pieces 13 before the sliding panel folds back the upper wall onto itself.

Nach dem Zurückfalten der oberen Wandung des Schlauchstückes 13 auf sich selbst kann eine Anpressrolle 20 vorgesehen sein, die in Transportrichtung x der Schlauchstücke - im Bereich der Bodenöffnung 14 - angebracht ist. Durch das Hindurchfahren der Bodenöffnung durch den Spalt, den die Rolle 20 mit dem Tisch oder einer Gegenwalze bildet, werden Falzkanten stabilisiert beziehungsweise fixiert.After folding back of the upper wall of the tube piece 13 on itself, a pressure roller 20 may be provided which is mounted in the transport direction x of the tube pieces - in the region of the bottom opening 14. By passing the bottom opening through the gap formed by the roller 20 with the table or a counter-roller, folding edges are stabilized or fixed.

In einer weiteren Ausführungsform kann das Schiebeblech 15 der Bodenöffnungsvorrichtung 8 in einem Winkel α zur Tischebene geneigt sein. Bei dieser Ausführungsform kann das Schiebeblech aus einem flexiblen Material gestaltet sein. Während des Zurückfaltens der oberen Wandung des Schlauchstückes kann sich das flexible Schiebeblech an den Tisch anschmiegen und übt damit eine Kraft - mit einer Hauptkomponente in y-Richtung - auf die Wandungsfalte aus, so dass bereits in diesem Arbeitsschritt eine haltbare Falte gebildet wird. In einer solchen Ausführungsform wäre eine Anpressrolle 20 nicht unbedingt notwendig. Es wird aber nicht ausgeschlossen, dass eine Ausführungsform, die beide Merkmale - ein um den Winkel α angewinkeltes Schieberblechs und eine Anpressrolle 20 - umfasst, vorteilhaft sein kann.In a further embodiment, the sliding plate 15 of the bottom opening device 8 may be inclined at an angle α to the plane of the table. In this embodiment, the sliding plate can be made of a flexible material. During the folding back of the upper wall of the hose piece, the flexible sliding plate can cling to the table and thus exerts a force - with a major component in the y direction - on the wall fold, so that a durable fold is already formed in this step. In such an embodiment, a pressure roller 20 would not be necessary. However, it is not excluded that an embodiment, both features - one by the angle α Angled slide plate and a pressure roller 20 - includes, may be advantageous.

Die Figur 3 zeigt die Ansicht III - III in der Fig. 2. In dieser Figur 3 ist ein Andrückblech 26 zu erkennen, das mit dem nicht näher dargestellten Transporttisch einen horizontalen Spalt bildet. Zwischen Transporttisch und Andrückblech 26 wird durch ein nicht gezeigtes Transportsystem das Schlauchstück 13 transportiert. Das Andrückblech 26 stellt nicht nur den Andruck des Schlauchstücks in Richtung des Tischbleches sicher, sondern bildet mit seiner dem Ende des Schlauchstück 13 zugewandten Kante eine Falzkante dar, entlang welcher der Boden aufgeklappt wird. Dieser Sachverhalt wird anhand der Figuren 4 und 5 deutlich. Zwischen dem Andrückblech und dem Ende des Schlauchstücks ist noch ein Saugband 27 angeordnet. Dieses Saugband ist ein mit Luftdurchtrittsöffnungen versehenes Transportband, welche über einen nicht näher dargestellten Saugkasten läuft. Dieser Saugkasten ist mit einem Unterdruck beaufschlagt, so dass die auf dem Transporttisch aufliegende Wandung vom Saugkasten über die Luftdurchtrittsöffnungen in Richtung auf den Saugtisch gesogen wird. Damit wird sichergestellt, dass die untere Wandung beim Zurückfalten der oberen Wandung auf dem Transporttisch verbleibt.The FIG. 3 shows the view III - III in the Fig. 2 , In this FIG. 3 is a pressure plate 26 can be seen, which forms a horizontal gap with the transport table, not shown. Between transport table and Andrückblech 26, the hose piece 13 is transported by a transport system, not shown. The Andrückblech 26 not only ensures the pressure of the hose piece in the direction of the table top, but forms with its the end of the hose piece 13 facing edge is a folded edge, along which the bottom is opened. This situation is based on the FIGS. 4 and 5 clear. Between the Andrückblech and the end of the hose piece is still a suction belt 27 is arranged. This suction belt is provided with air passage openings conveyor belt which runs over a suction box, not shown. This suction box is subjected to a negative pressure, so that the resting on the transport table wall is sucked from the suction box on the air passage openings in the direction of the suction table. This ensures that the lower wall remains when folding back of the upper wall on the transport table.

Um das Schieberblech 15, welches sich in der Figur 3 bereits in Richtung z in Bewegung befindet, auch zwischen die beiden Wandungen einfädeln zu können, wurde die obere Wandung durch geeignete Einrichtungen wie Vakuumsauger bereits leicht angehoben, so dass ein bereits leicht geöffnetes Ende 25 entstanden ist.To the slide plate 15, which is located in the FIG. 3 Already in the direction of z in motion, to be able to thread between the two walls, the upper wall was already slightly raised by suitable means such as vacuum suction, so that an already slightly open end 25 has arisen.

Die Bewegung des Schieberbleches 15 ist der Rotationsbewegung der Hebelarme 19 (nicht sichtbar) und 19', die in der x-z-Ebene stattfindet, überlagert. Die in der Figur 2 gezeigten Bauteile sind auch, sofern sie nicht durch andere Bauteile verdeckt sind, in der Figur 3 zu erkennen.The movement of the slide plate 15 is superimposed on the rotational movement of the lever arms 19 (not visible) and 19 ', which takes place in the xz plane. The in the FIG. 2 shown components are also, unless they are covered by other components, in the FIG. 3 to recognize.

Die Figur 4 zeigt eine ähnliche Situation die die Figur 3, jedoch ist das Schieberblech 15 nun voll in Richtung z ausgefahren. Dabei wurde das Schieberblech 15 oberhalb des Andrückbleches 27 geführt, so dass die obere Wandung des Schlauchstücks auf sich selbst unter Ausbildung von so genannten Dreieckstaschen 28 und 29 zurückgefaltet wurde. Es ist dabei das gewünschte offene Bodenquadrat 14 entstanden. Während des Öffnens wurde sowohl das Schlauchstück 13 in Richtung z weiterbewegt und die Hebelarme 19 und 19' weiter in Richtung des Pfeils 24 weitergedreht. Dabei wurde und wird die Rotationsgeschwindigkeit, wenn das Schieberblech 15 in Kontakt mit dem Schlauchstück 13 war und ist, so verändert, dass die Geschwindigkeitskomponente in Richtung z stets so groß war und ist wie die Geschwindigkeit des Schlauchstücks. Das bedeutet also, dass zunächst, wenn das Schieberblech 15 das Schlauchstück 13 erstmals berührt hat, die Geschwindigkeit reduziert wird, bis die Hebelarme 19 und 19' den Scheitelpunkt (Hebelarm und Träger fluchten) erreicht haben. Von nun an wird die Geschwindigkeit wieder erhöht, bis das Schieberblech 15 nicht mehr in Kontakt mit dem Schlauchstück steht. Insgesamt kann mit dieser Vorrichtung also das Schieberblech über einen bestimmten Zeitraum mit einer Geschwindigkeit in Transportrichtung (z) bewegt werden, die der Transportgeschwindigkeit des Schlauchstücks 13 entspricht. Das Schlauchstück 13 braucht im Vergleich zum Stand der Technik nicht mehr angehalten werden, damit das offene Bodenquadrat gebildet werden kann. Die Figur 5 zeigt nun die Situation, in der das Schieberblech vollständig gegen die Richtung z zurückgezogen wurde und damit nicht mehr in Kontakt mit dem offenen Bodenquadrat 14 steht. Die Rotationsgeschwindigkeit der Hebelarme 19 und 19' kann nun kurzzeitig und gegebenenfalls kräftig erhöht werden, damit das Schieberblech 15 wieder bereit steht, wenn das folgende Schlauchstück 13 zugeführt wird.The FIG. 4 shows a similar situation the the FIG. 3 However, the slide plate 15 is now fully extended in the direction z. It was the Slider plate 15 is guided above the Andrückbleches 27, so that the upper wall of the hose piece was folded back on itself to form so-called triangular pockets 28 and 29. It is the desired open bottom square 14 was created. During opening both the hose piece 13 was moved in the direction z and the lever arms 19 and 19 'further rotated in the direction of the arrow 24. In this case, the rotational speed when the slide plate 15 was and is in contact with the tube piece 13 has been and is changed so that the speed component in the direction z was always as large and is as the speed of the tube piece. This means that, first, when the slide plate 15 has touched the tube piece 13 for the first time, the speed is reduced until the lever arms 19 and 19 'have reached the apex (lever arm and carrier aligned). From now on, the speed is increased again until the slide plate 15 is no longer in contact with the hose piece. Overall, with this device so the slide plate over a certain period of time at a speed in the transport direction (z) to be moved, which corresponds to the transport speed of the hose piece 13. The tube piece 13 need not be stopped in comparison to the prior art, so that the open bottom square can be formed. The FIG. 5 now shows the situation in which the slide plate was completely withdrawn against the direction z and thus is no longer in contact with the open bottom square 14. The rotational speed of the lever arms 19 and 19 'can now be increased briefly and possibly strong, so that the slide plate 15 is ready again when the following tube piece 13 is supplied.

Kurz nach Verlassen des Schieberbleches 15 trifft das offene Bodenquadrat auf die Anpressrolle 20, die mit dem Transporttisch einen Anpressspalt bilden kann. Der Spalt kann ein festes, aber mittels einer Einstellvorrichtung einstellbares Maß aufweisen. Die Rolle kann aber auch mit ihrem Eigengewicht auf den Tisch drücken. Um die Anpresskraft zu erhöhen, kann die Rolle mittels Federkraft zusätzlich gegen den Tisch angestellt werden. Die Anpressrolle 20 kann auch statt mit dem Tisch mit einer weiteren Rolle oder Walze einen Walzenspalt bilden. Die Rolle 20 kann zudem zweigeteilt sein, um die größere Höhe des Teils des offenen Bodenquadrates berücksichtigen zu können, der auf sich selbst zurückgefaltet wurde, der ja auf zwei Sackwandungen aufliegt. Außerdem kann die Rolle 20 temperiert sein, um die Falze des offenen Bodenquadrates noch besser einprägen zu können. Bezugszeichenliste 1 Sackherstellungsvorrichtung 2 Schlauch 3 Wickel 4 Abwicklungseinrichtung 5 Lagentrennstation 6 Querschneideeinrichtung 7 Einrichtung zur Änderung der Transportrichtung 8 Bodenöffnungsstation 9 Ventilstation 10 Bodenschließstation, Zulegestation 11 Deckblattstation 12 Sackstapel 13 Schlauchstück 14 Offenes Bodenquadrat, geöffneter Sackboden 15 Sch ieberblech 16 Schlitten 17 Träger 18 Drehlager 19 Hebelarm 20 Anpressrolle 21 Pneumatikzylinder 22 Elektromotor 23 Pfeil 24 Pfeil 25 offenes Ende des Schlauchstücks 13 26 Andrückblech 27 Saugband 28 Dreieckstasche 29 Dreieckstasche 30 Gestell Shortly after leaving the slide plate 15, the open bottom square hits the pressure roller 20, which can form a Anpressspalt with the transport table. The gap may have a fixed, but adjustable by means of an adjustment measure. The role can also press with its own weight on the table. To increase the contact pressure, the role can be made by spring force in addition to the table. The pressure roller 20 may also form a nip instead of the table with another roller or roller. The roll 20 can also be divided into two, the larger Height of the part of the open bottom square can be considered, which was folded back on itself, which rests on two bags walls. In addition, the roller 20 may be tempered in order to impress the folds of the open bottom square even better. LIST OF REFERENCE NUMBERS 1 Bag-making apparatus 2 tube 3 reel 4 handling facility 5 Location separating station 6 Transverse cutting device 7 Device for changing the transport direction 8th Bottom opening station 9 valve station 10 Floor closing station, Zulegestation 11 Cover Station 12 bag stack 13 hose Connector 14 Open floor square, opened sack floor 15 Sliding plate 16 carriage 17 carrier 18 pivot bearing 19 lever arm 20 pressure roller 21 pneumatic cylinder 22 electric motor 23 arrow 24 arrow 25 open end of the tube piece 13th 26 pressure plate 27 suction belt 28 triangle bag 29 triangle bag 30 frame

Claims (8)

  1. Device (1) for opening ends of tube pieces (13) to open base squares (14), which consist of two superimposed walls
    • which at least comprises a transport device with which the tube piece (13) may be conveyed in a horizontal position in a transport direction (x), which runs transversely to its direction of extension (z)
    • which comprises at least one means (15) for opening the base square (14), which is movable in the direction of extension (z), and
    • with which the upper wall of one end of a tube piece (13) may also be folded back to form an open base square (14),
    • wherein the at least one means (15) for opening the base square (14) is movable at least temporally simultaneously in the direction of transport (x) and in the direction of extension (z) of the tube piece (13),
    • wherein a first means for moving (22, 19, 19', 18, 17) is provided, with which the means for opening (15) is movable
    - in the transport direction (x) of the tube piece (13) or
    - in the transport direction (x) of the tube piece and in the direction of extension (z),
    • wherein the first means for moving (21, 16, 17) is rotably mounted on a lever arm (19, 19') which is rotatable about an axis of rotation (D3) which is directed at right angles to the plane of the tube piece (13), and a further lever arm (19, 19') which is rotatable about a further axis of rotation (D4) which is directed orthogonally to the plane of the tube piece (13),
    • wherein a second means for moving (21, 16, 17) is provided in the direction of extension of the tube piece (13) and is movable by the first means for moving and carries the means (15) for opening, and
    • wherein the second means for moving (16, 17, 21) comprise a coupling element (17) and a drive (21) with which the means for opening (15) may be moved relative to the first means for moving (21, 16, 17), and
    • wherein both lever arms (19, 19') are connected via the coupling element (17), which is mounted rotatably in both lever arms
    characterized in that
    • the means for opening is mounted on a carriage (16), which (16) is movable on the coupling element.
  2. Device according to claim 1,
    characterized in that
    the drive of the first means for moving may be so synchronized that the means for opening (15) move along the direction of transport of the tube piece with the same speed as the tube piece (13).
  3. Device according to one of the preceding claims,
    characterized in that
    the drive of the second means for moving is fixed to the coupling element.
  4. Device according to one of the preceding claims,
    characterized in that
    the drive comprises a pneumatic cylinder (21).
  5. Device according to one of the preceding claims,
    characterized in that
    an electric motor (22) is provided for driving at least one lever arm (19, 19') via an axle/shaft at the second rotation point (D3, D4).
  6. Device according to one of the preceding claims,
    characterized in that
    the first means (21) for moving and/or the second means (15) for moving comprises a linear drive or linear motor.
  7. Method for opening ends of tube pieces (13) to open base squares (14) which (13) consist of two superimposed walls,
    • wherein at least a transport device is provided with which the tube pieces (13) may be conveyed in a horizontal position in a transport direction (x), which runs transversely to their direction of extension (z),
    • wherein at least one means (15) for opening the base square (14) is movable in the direction of extension (z), and
    • wherein for opening the ends of the tube piece (13) to form an open base square (14), the upper wall of the tube piece (13) may be folded back on itself,
    • the at least one means (15) for opening the base square (14) is movable at least temporally simultaneously in the direction of transport (x) and in the direction of extension (z) of the tube piece (13)
    • wherein a first means for moving (22, 19, 19', 18, 17) is provided, with which the means for opening (15) is movable
    - in the transport direction (x) of the tube piece (13) or
    - in the transport direction (x) of the tube piece and in the direction of extension (z),
    • wherein a second means for moving (21, 16, 17) is provided in the direction of extension of the tube piece (13) and is movable by the first means for moving and carries the means (15) for opening,
    • wherein the second means for moving (16, 17, 21) comprise a coupling element (17) and a drive (21) with which the means for opening (15) may be moved relative to the first means for moving (21, 16, 17), and
    • wherein the first means for moving (21, 16, 17) is rotably mounted on a lever arm (19, 19') which is rotatable about an axis of rotation (D3) which is directed at right angles to the plane of the tube piece (13), and a further lever arm (19, 19') which is rotatable about a further axis of rotation (D4) which is directed orthogonally to the plane of the tube piece (13), wherein both lever arms (19, 19') are connected via the coupling element (17), which is mounted rotatably in both lever arms
    characterized in that
    • the means for opening is mounted on a carriage (16), which (16) is movable on the coupling element.
  8. Device according to the preceding claim,
    characterized in that
    at least one means (15) for opening the base square (14) performs a rotational movement in the plane (x, z) of the flat-lying tube piece (13).
EP09780854.7A 2008-08-05 2009-07-21 Device and method for opening ends of hose pieces to form open bottom squares Not-in-force EP2337678B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008040999 2008-08-05
DE102008063949A DE102008063949A1 (en) 2008-08-05 2008-12-19 Trailing slide
PCT/EP2009/059330 WO2010015505A1 (en) 2008-08-05 2009-07-21 In-line slide for opening ends of hose pieces

Publications (2)

Publication Number Publication Date
EP2337678A1 EP2337678A1 (en) 2011-06-29
EP2337678B1 true EP2337678B1 (en) 2017-04-26

Family

ID=41501433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09780854.7A Not-in-force EP2337678B1 (en) 2008-08-05 2009-07-21 Device and method for opening ends of hose pieces to form open bottom squares

Country Status (3)

Country Link
EP (1) EP2337678B1 (en)
DE (1) DE102008063949A1 (en)
WO (1) WO2010015505A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107791582A (en) * 2016-08-29 2018-03-13 宜兴威尼特集装袋有限公司 Paper bag production system
CN110450455B (en) * 2019-06-27 2021-03-23 枞阳县中邦科技信息咨询有限公司 Wrapping bag processing is with rolling over a positioning device
WO2021151621A1 (en) * 2020-01-29 2021-08-05 Windmöller & Hölscher Kg Device for producing corner foldovers on tubular bag bodies

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE619167C (en) * 1934-10-28 1935-09-23 Windmoeller & Hoelscher G M B Cross bottom bag machine
DE912045C (en) * 1952-02-17 1954-05-24 Fischer & Krecke Kg Bottom laying device for cross bottom bag machines
CZ289183B6 (en) 1995-01-25 2001-11-14 Windmöller & Hölscher Apparatus for opening out ends of flat tubular sections
AT406755B (en) * 1998-10-05 2000-08-25 Starlinger & Co Gmbh DEVICE FOR OPENING TUBULAR BAG BODIES

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102008063949A1 (en) 2010-02-11
EP2337678A1 (en) 2011-06-29
WO2010015505A1 (en) 2010-02-11

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