EP0847922B1 - Dispositif de cerclage de paquets - Google Patents

Dispositif de cerclage de paquets Download PDF

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Publication number
EP0847922B1
EP0847922B1 EP97117462A EP97117462A EP0847922B1 EP 0847922 B1 EP0847922 B1 EP 0847922B1 EP 97117462 A EP97117462 A EP 97117462A EP 97117462 A EP97117462 A EP 97117462A EP 0847922 B1 EP0847922 B1 EP 0847922B1
Authority
EP
European Patent Office
Prior art keywords
strapping
drum
hooping
movable
tensioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97117462A
Other languages
German (de)
English (en)
Other versions
EP0847922A1 (fr
Inventor
Karl-Hans Schüttler
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.)
Signode Packaging Systems GmbH
Original Assignee
Signode Bernpak GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Signode Bernpak GmbH filed Critical Signode Bernpak GmbH
Publication of EP0847922A1 publication Critical patent/EP0847922A1/fr
Application granted granted Critical
Publication of EP0847922B1 publication Critical patent/EP0847922B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00Bundling articles
    • B65B13/18Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/22Means for controlling tension of binding means

Definitions

  • the invention relates to a device for strapping of packages according to the preamble of the claim 1.
  • the tension drum has the fundamental disadvantage that that the slip between the strapping and the tensioning drum only after an angle of rotation of over 180 °. This results in the effect that with less compressible pieces of strapping a high strapping tension with the Tension drum cannot be applied because that Strapping should not be withdrawn as far can that through a correspondingly large wrap angle the tension drum these forces are generated could.
  • DE-B-2 050 833 is a tensioning device for tapes made of plastic, textiles and the like known.
  • a winding head with two identical ones and pivotable clamp bodies are provided.
  • the rotary drive of the winding head for tensioning the Strapping tool is made using a manually operated one Lever. Even with such an arrangement of Clamping bodies takes place between the sprags and the strapping a slip takes place only after one Angle of rotation of the tensioning drum canceled by more than 180 ° becomes.
  • Another object of the invention is that Cycle times of a machine with a tension drum increase, i.e. a larger number of straps per Allow time unit.
  • the strapping device is accordingly characterized by that the first drum segment is rigid and that second drum segment relative to the first drum segment is narrowing and is movable at the end its movement together with the first drum segment forms a strapping clamp.
  • the drum segments form the tensioning drum from a strapping clamp.
  • the tensioning drum carries the strapping tool Tensile forces not frictionally, but force or clamp-on. That means that the strapping tool Retracting force exerted significantly increased can be and above all much earlier and not only after wrapping around the drum segments 180 °.
  • One with such a "rotating strapping clamp” equipped strapping device is therefore able to compress even little Packages in which the strapping is tightened the strapping was pulled back only a short distance can be strapped tightly.
  • a further development of the invention provides that the movable drum segment solely due to the Traction of the wrapping strap in Clamp position is movable.
  • the invention goes here assume that the strapping with the rotary motion the tension drum from its extended position occupies a substantially S or Z-shaped position and the angles formed at the entry and exit or from the strapping passage gap are forces on the movable drum segment to transfer it against the other drum segment to form a strap clamp move.
  • An automatically acting, solely from the strapping or its wrapping controlled strapping clamp created, too whose function requires no special drive means are.
  • the movable drum segment is therefore preferred from its the strapping passage defining position against a spring force in Movable clamping position.
  • the spring force ensures that after relieving the moving drum segment by relaxing the strapping the movable Drum segment automatically returns to the starting position can move in the strapping passage gap free is.
  • the machine typical She sees increasing cycle times for strapping Invention before that between the tension drum and Strapping device a controlled Strapping clamp is arranged, the strapping after tensioning by the tension drum holds while the strapping head forms the strapping closure and the tensioning drum reverses in the starting position.
  • the difference to do this in the prior art Tension drum maintain its tension position as long as the strapping device with the Strapping fastener formation was concerned. Now can already reverse the tension drum to ready for the next strapping process stand.
  • the slower sequential mode is according to the invention by a faster working parallel operating mode has been replaced.
  • a strapping device 15 On the machine frame 11 one in its entirety with 10 designated strapping machine an essentially closed strapping guide channel 12, through and around a with package 13 indicated by dash-dotted lines around a strapping means 14, in particular a thermoplastic plastic strap, a strapping device 15 is supplied.
  • the task is to overlap ends a strapping surrounding the package with each other to connect, in particular by exposure to heat to weld together. For this are especially resistance heating or friction welding processes in use.
  • the strap 14 e.g. also a Steel belt could be - will be outside the machine frame 11 on a rotatably mounted strapping roll (Drum) 55 in stock.
  • the motor drive of this pair of rollers 16 promotes the strapping 14 in one Strapping agent store 17 of such a length of tensioning means 14 stored tension-free, such as he at least for the following strapping and for the Distance of the strapping material to the sealing unit 15 is required.
  • this Pair of rollers 18 drive the strapping 14 frictionally on.
  • This pair of rollers is driven reversibly, because on the one hand it serves to fire the Strapping means 14 in the strap guide channel 12 and, with the opposite drive direction, on the other hand the withdrawal of the strapping means 14 and its tightening around the package 13. In the latter In the sense, the pair of rollers is a so-called "low tension clamping device".
  • the starting position of the machine for a strapping process schematically illustrates FIG. 2.
  • the strapping means 14 was by means of the weft roller pair 18 (Direction of rotation according to the arrow in the upper right roll) through a strapping passage 22 of the tension drum 19 through through the strap guide 21 and around the in Fig. 2 and the following strapping guide channel, not shown 12 through the strapping device 15 fed until that leading strapping end 14 'against a so-called. Bullet switch 23 has run.
  • Strap end 14 On its way there has free leading Strap end 14 'has a separator slot 24 in pass through a first strap clamp 25 and then a separator 26 within a so-called "Weld clamp” 27.
  • the two separator slots serve to tighten the strapping ends in their common overlap area (initially) keep away from each other.
  • the above-mentioned components of the strapping device 15 are in the illustrated embodiment Part of a strapping device, which the strapping ends heated by means of friction welding and thereby plasticized, so that they can weld together.
  • This is in the context of the present invention to be understood only as an example, because the invention is regardless of the specific type of design of the strapping device 15.
  • the actuation of the entry switch 23 by the leading, free end of strapping signals the machine control the machine starting position and practically performs a 'reset'.
  • This starting position is characterized according to FIG. 2, that within the strapping channel 12 (Fig. 1) already a strapping section of the strapping means 14 is kept ready.
  • the strapping process now sets itself after a package 13 is placed in the channel 12 is.
  • the pair of rollers 18 receives the command to reserving drive (see arrow direction of the right top roller in Fig. 3) and pulls the strapping 14 back, which corresponds to the from Roller pair 18 exerted frictional forces around the Package 13 begins to tighten.
  • the strapping means 14 switches the "High Tension” tensioning drum 19 in the strapping tensioning process on.
  • the strapping drum 19 comprises two arranged on a common rotatable carrier 28 Drum segments 29 and 30.
  • the first drum segment 29 is rigid by means of two screw connections 31 attached to the head 28.
  • the second drum segment 30, however, is only with the help of a single axis 32 held on the head piece 28 and at the same time about this axis 32 parallel to the axis of rotation 33 pivotally mounted on the head piece 28.
  • Regarding the central axis 33 is the pivot axis 32 to the inlet side 34 of the strapping passage gap 23, the between the two drum segments 29 and 30 is kept clear, arranged offset.
  • the movable drum segment 30 has one Section 35, in which a particular as Coil spring trained compression spring 36 integrated which is at one end on the cut-out edge 37 and the other supported on an abutment 38 fixed to the head piece.
  • This spring 36 holds the cut-out edge 35a of the movable drum segment against the back surface 38a of the abutment 38 fixed to the head piece, such that the strapping through channel 22 - as in FIG Fig. 3 shown - in this 'zero position' of the tension drum for the strapping means 14 freely is kept open.
  • the drum segment 30 (with respect to the Figures) counterclockwise about axis 32 arranged pivotable.
  • the Tension drum 19 by a motor drive (in particular by means of a current-regulated, reversible low-voltage DC motor) in rotation offset, in the described configuration and arrangement of the movable drum segment 13 clockwise. The beginning of this rotation is shown in Fig. 4.
  • the drive the strapping clamp 41 takes place via a central camshaft 43, the control cam 44 for the second strapping clamp 41, 45 for a strapping knife 46, 47 for the first strap clamp 25 and 48 for an additional strapping clamp 20 has.
  • the strapping clamp 20 becomes the tension drum 19 already back to their starting position by motor 2 and 3 reversed, the pair of rollers 18 which is released when the tensioning drum 19 turns back Strapping excess length due to reversed Direction of rotation in the strapping material store 17 (Fig. 1) promotes. Now the strapping clamp 20 open again. This is shown in FIG. 6 the rest of the package strapping that has now been completed 50 is recognizable.
  • the working cycle of a strapping is then completed in that after removing the with complete strapping 51 and a strapping closure 52 provided completed package 13 the strapping tool from the work table of the machine 10 14 again in the strapping channel 12 is shot, with which the basic position the machine according to FIG. 2 is reached again is.
  • Deviating from the illustrated embodiment can as a helical compression spring 36 in the embodiment shown spring also by another clamping means to be replaced.
  • a coiled leg spring on the swivel axis 32 rest with one end on head 28 and with their other end of the turn on the pivoting Drum segment 30 is fixed.
  • the inventive design of the tension drum 19 also allows them to be brought up a clamping force rotated circumferentially by more than 180 ° becomes. Because of the strapping of the strapping the strapping clamp 40 opened again and the high traction of the wrap friction taken over. It follows the advantage that the spring 36 is dimensioned very weak can be. This in turn has the advantage that the spring 36 responds particularly quickly to Closing the strapping clamp 40 already a very small wrap angle of the movable Segment 30 is sufficient.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Claims (10)

  1. Dispositif de cerclage de paquets avec un moyen de cerclage (14), notamment une bande thermoplastique, qui est introduit à partir d'une réserve de moyen de cerclage dans un canal de guidage (12) de moyen de cerclage entourant le paquet, et qui est amené à travers ce canal vers une unité de fermeture (15) de moyen de cerclage, des moyens étant prévus pour tendre le moyen de cerclage autour du paquet, lesquels englobent un tambour tendeur (19) pouvant être entraíné en rotation et comportant une fente de passage (22) diamétrale pour le moyen de cerclage, et deux segments (29, 30) de tambour espacés l'un de l'autre par la fente de passage du moyen de cerclage, sur les surfaces périphériques desquels le moyen de cerclage peut être enroulé pour la tension, caractérisé en ce que le premier segment (29) de tambour est fixe, et en ce que le deuxième segment (30) de tambour peut être déplacé par rapport au premier segment (29) de tambour afin de rétrécir la fente, et forme avec le premier segment (29) de tambour à la fin de son déplacement une pince (40) de moyen de cerclage.
  2. Dispositif selon la revendication 1, caractérisé en ce que le segment mobile (30) de tambour peut être déplacé dans la position de serrage par la seule force de traction du moyen de cerclage (14) l'entourant.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le segment mobile (30) de tambour peut être déplacé de sa position définissant la fente de passage (22) du moyen de cerclage à une position de serrage en s'opposant à la force d'un ressort.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le segment mobile (30) de tambour peut être déplacé autour d'un axe de pivotement (32) qui s'étend parallèlement à l'axe de rotation (33) du tambour tendeur (19).
  5. Dispositif selon la revendication 4, caractérisé en ce que l'axe de pivotement (32) est décalé par rapport à la pince (40) du moyen de cerclage.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les segments (29, 30) de tambour sont fixés ou articulés sur un support commun (28) entraíné en rotation.
  7. Dispositif selon l'une quelconque des revendications précédentes 3 à 6, caractérisé en ce que la force de ressort résulte d'un ressort (36) qui prend appui sur le support (28) et sur le segment mobile (30) de tambour.
  8. Dispositif selon la revendication 7, caractérisé en ce que le ressort (36) est un ressort de compression qui est essentiellement disposé dans un évidement (35) du segment mobile (30) de tambour.
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une pince (20) de moyen de cerclage commandée est disposée entre le tambour tendeur (19) et l'unité de fermeture (15) de moyen de cerclage, laquelle pince retient le moyen de cerclage (14) tendu après la tension par le tambour tendeur (19) pendant que l'unité de fermeture (15) du moyen de cerclage effectue la fermeture (52) du moyen de cerclage, et que le tambour tendeur (19) revient dans la position de départ.
  10. Dispositif selon la revendication 9, caractérisé en ce que le tambour tendeur (19) peut être remis par rotation dans sa position de départ par voie motorisée.
EP97117462A 1996-12-14 1997-10-09 Dispositif de cerclage de paquets Expired - Lifetime EP0847922B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19652078 1996-12-14
DE19652078A DE19652078A1 (de) 1996-12-14 1996-12-14 Vorrichtung zum Umreifen von Packstücken

Publications (2)

Publication Number Publication Date
EP0847922A1 EP0847922A1 (fr) 1998-06-17
EP0847922B1 true EP0847922B1 (fr) 2000-05-03

Family

ID=7814723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117462A Expired - Lifetime EP0847922B1 (fr) 1996-12-14 1997-10-09 Dispositif de cerclage de paquets

Country Status (3)

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EP (1) EP0847922B1 (fr)
DE (2) DE19652078A1 (fr)
ES (1) ES2147961T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6463848B1 (en) * 2000-05-08 2002-10-15 Illinois Tool Works Inc. Strapper with improved winding and cutting assembly
US6708606B1 (en) * 2002-10-31 2004-03-23 Illinois Tool Works, Inc. Strapper with improved winder
SE1000661A1 (sv) * 2010-06-20 2011-12-21 Mowi Teknik Ab Förfarande och anordning för tillförsel av tråd till en bindningsmaskin

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2050833A1 (en) * 1970-10-16 1972-04-20 Banholzer & Wenz, 7300 Esslingen Strip tensioner - for plastic or textile continuously fed packing material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605456A (en) * 1985-05-02 1986-08-12 Signode Corporation Method and apparatus for feeding and tensioning strap in a strapping machine
DE3933756A1 (de) * 1989-10-10 1991-04-18 Schwede Horst Rueckspann-vorrichtung fuer ein verpackungs-band
DE4237437A1 (de) * 1992-11-06 1994-05-11 Signode Bernpak Gmbh Maschine zum Umreifen von Packstücken

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2050833A1 (en) * 1970-10-16 1972-04-20 Banholzer & Wenz, 7300 Esslingen Strip tensioner - for plastic or textile continuously fed packing material

Also Published As

Publication number Publication date
DE59701567D1 (de) 2000-06-08
EP0847922A1 (fr) 1998-06-17
DE19652078A1 (de) 1998-06-18
ES2147961T3 (es) 2000-10-01

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