EP0422427B1 - Dispositif de tension pour lien d'emballage - Google Patents

Dispositif de tension pour lien d'emballage Download PDF

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Publication number
EP0422427B1
EP0422427B1 EP90118081A EP90118081A EP0422427B1 EP 0422427 B1 EP0422427 B1 EP 0422427B1 EP 90118081 A EP90118081 A EP 90118081A EP 90118081 A EP90118081 A EP 90118081A EP 0422427 B1 EP0422427 B1 EP 0422427B1
Authority
EP
European Patent Office
Prior art keywords
clamping
guiding
axis
rotation
tape
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
EP90118081A
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German (de)
English (en)
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EP0422427A1 (fr
Inventor
Roland Schwede
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0422427A1 publication Critical patent/EP0422427A1/fr
Application granted granted Critical
Publication of EP0422427B1 publication Critical patent/EP0422427B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/22—Means for controlling tension of binding means

Definitions

  • the invention relates to a tensioning device according to the preamble of claim 1.
  • Packaging stations are known in which stacks of goods, which are preferably magazine stacks, are strapped with a packaging strap, ie the packaging strap is looped around the stack of goods once.
  • the ends of the packaging tape are joined together.
  • Packing stations of this type are also called strapping stations, since sheet metal belts were previously preferred as the band. Since the packaging tape is intended to hold the stack of goods firmly together, the tape must be tensioned before the two ends are connected, this back tensioning having to be more pronounced, the softer, that is to say more compressible, that the goods forming the stack are.
  • magazines with only a medium range existing advertising inserts are strongly compressed when the good stacks are tightened, in particular unevenly.
  • Back tensioning devices are already known, in which the band is gripped by means of a clamping device and then tensioned back by means of a lever by a path limited by the maximum lever path.
  • Other tensioning devices are also known in which the tape is pressed against a tensioning disk by means of one or more rollers. Sufficient back tension forces cannot be achieved here.
  • the invention is therefore based on the object of providing a tensioning device of the generic type, by means of which the tensioning of the packaging tape by any unlimited tensioning path is possible while generating any high tensioning forces.
  • the measures according to the invention make it possible for the band to be clamped between a support surface of a driving disk and the clamping elements associated with it, and these clamping elements being released or brought into a clamping position with the rotation of the driving disk and the band held by it will.
  • a good stack for example a magazine stack, which can be wrapped in packaging material 3, is wrapped with a packaging tape 4.
  • This is withdrawn from a store 5 and shot into the packaging station 1 by means of a so-called shooting device 6, whereby it loosely envelops the stack of goods 2.
  • the free end 7 of the band 4 is gripped and held by a clamp 8.
  • the insertion device 6 consists of a pair of rollers 9 which can be driven at high speed and a drive motor (not shown in the drawing).
  • a motorized retensioning device 12 is arranged between the insertion device 6 and the store 5.
  • This device 12 has a driver disk 13 which can be driven in the tensioning direction 11 by a stationary electric motor 14.
  • the disc 13 has a cylindrical outer peripheral surface which serves as a support surface 15 for the band 4.
  • the disk 13 is provided on the side facing away from the motor with a cylindrical projection 17 which extends concentrically to the axis of rotation 16 and to which a circular disk-shaped cover plate 18 is fastened with screws 19 on the end face.
  • a circumferential annular groove 20 is formed between the disc 13, the cover plate 18 and the projection 17, which is open to the outside.
  • annular sector-shaped clamping elements 21 are arranged, which are arranged over the entire circumference of the disk 13. These clamping elements 21 have at their radially inner end more than one as a 180 ° extending partially cylindrical pivot pin 22, whose diameter a corresponds approximately to the width b of the annular groove 20 in the direction of the axis of rotation 16, so that this pivot pin 22 and thus the respective clamping element 21 in the direction of the axis of rotation 16 is fixed, but radially displaceable and is held in the annular groove 20 so as to be pivotable about the axis 23 of the pivot pin 22, as will be described in more detail below with reference to FIGS. 3 to 5.
  • the pivot pin 22 is followed by a lever 24 which, on the side facing the disc 13, opens tangentially out of the pivot pin 22, so that it lies firmly against the disc in the position shown in FIGS. 4 and 5.
  • the thickness c of the lever 24 in the direction of the axis of rotation 16 is smaller than the width b of the annular groove 20, so that the pivot pin 22 protrudes beyond the lever 24 on the side facing the cover plate 18.
  • a clamping jaw 25 is formed radially on the outside of the lever 24, which projects in the direction of the disk 13 and has a clamping surface 26.
  • the clamping surface 26 In the position shown in FIGS. 4 and 5, when the clamping element 21 with its lever 24 lies firmly against the disk 13, the clamping surface 26 is arranged radially outside and above the bearing surface 15 of the disk 13 and runs parallel to the latter. It is therefore also partially ring-cylindrical, its curvature being approximately identical to that of the support surface 15, ie its radius of curvature is approximately identical to the radius r of the support surface 15.
  • the clamping element 21 can be moved radially to the axis of rotation 16 and pivoted about the axis 23 of the pivot pin 22, namely between the position shown in FIGS. 4 and 5, in which the lever 24 bears against the disc 13 and the Position shown in Fig. 3, in which the lever 24 bears against an oblique stop surface 30 on the cover plate 18.
  • the clamping element 21 is pressed by a prestressed helical compression spring 31 arranged on the driving pin 28 between the disk 13 and the lever 24.
  • a prestressed compression spring 32 is arranged at the bottom of the annular groove 20, which is supported on the one hand against the projection 17 and on the other hand the pivot pin 22 and thereby tries to press the clamping element 21 into the radially pushed-out position shown in FIGS. 3 and 4.
  • This compression spring 32 can be a rubber spring, a metal spring or the like.
  • each clamping element 21 is held and taken along by the associated driving pin 28. For the rest, adjacent clamping elements 21 lie close together with their side faces.
  • a two-dimensionally acting guide element 33 is provided for guiding the clamping element 21 between the three positions shown in FIGS. 3 to 5. This has a circumference extending over approximately 180 ° Curve element 34, which has a guide surface 35 which is bent in the direction of the axis of rotation 16.
  • the clamping element 21 is guided with a guide wheel 36, which can be a roller bearing, in particular a ball bearing, the axis 37 of which in the position shown in FIGS. 4 and 5 runs exactly radially to the axis of rotation 16.
  • a counter guide surface 38 is provided which ensures that the guide wheel 36 always bears against the guide surface 35 even when the helical compression spring 31 is not present.
  • a further guide wheel 39 is rotatably mounted on the jaw 25 about an axis 40 perpendicular to the axis 37, which in the position of the clamping element 21 shown in FIGS. 4 and 5 runs parallel to the axis of rotation 16.
  • This guide wheel 39 can also be a roller bearing and in particular a ball bearing.
  • This guide wheel 39 bears against a guide surface 41 of a curve element 42, which is formed in one piece with the curve element 34.
  • the entire guide element 33 can be displaced radially to the axis of rotation 16 by means of guide rods 43 in a guide bearing 44 and is otherwise fixedly mounted. It can be displaced in the direction of the guide rods 43, that is to say radially to the axis of rotation 16, by means of a linear drive 45, which is a piston-cylinder drive which can be acted upon pneumatically.
  • a linear drive 45 which is a piston-cylinder drive which can be acted upon pneumatically.
  • the festival with the plate-like guide bearing 44 connected cylinder 46 is firmly connected to a machine frame in a manner not shown in detail, while the piston rod 47 engages the guide element 33.
  • this pressing device 48 the cam element 42 can be pressed in the direction of the bearing surface 15 of the driving disk 13, as a result of which the clamping element 21 is displaced from the position shown in FIG.
  • the device works as follows:
  • the clamping surface 26 of the jaw 25 still being at a distance d from the contact surface 15 Disc 13 is located, which is greater than the thickness e of the band 4.
  • the distance d is therefore usually between 1 and 2 mm.
  • the closing area 52 of the guide element 33 and usually also the circumferential extent of the guide element 33 as a whole are smaller than the wrap angle f of the band 4 on the disk 13.
  • an adjustable time switching element can be provided, at which the time is set during which the electric motor 14 is driven. Since its speed and the radius r of the bearing surface 15 are known, the length by which the band 4 is tensioned can be determined therefrom. The time switching element is therefore to be set according to corresponding empirical values.
  • a slip clutch with adjustable torque can also be used between the disk 13 and the motor 14, which sets the drive of the disk 13 when a certain torque is reached, which is in a fixed relation to the resilient force of the belt 4.

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

Claims (13)

  1. Dispositif tendeur pour une bande d'emballage (4) qui, dans un poste d'emballage (1), est enroulée autour d'une pile de produits (2) et dont l'extrémité libre (7) est maintenue en cet emplacement, un dispositif étant prévu pour pincer la bande (4) et pour la transporter dans un sens de tension (11), caractérisé en ce qu'il est prévu un disque d'entraînement (13) pouvant être entraîné par un moteur pour tourner autour d'un axe de rotation (16) et présentant une surface d'appui (15) pour la bande (4), en ce que des éléments de serrage (21) présentant une surface de serrage (26) sont associes au disque d'entraînement (13) et en ce qu'il est prévu pour les éléments de serrage (21) au moins un élément de guidage (33) au moyen duquel les éléments de serrage (21) peuvent, dans une zone de fermeture (52) qui est plus petite que l'angle d'enroulement (f) de la bande (4) autour de la surface d'appui (15), être amenés dans une position dans laquelle la bande (4) est maintenue par force entre leurs surfaces de serrage (26) et la surface d'appui (15).
  2. Dispositif selon la revendication 1, caractérisé en ce que les éléments de serrage (21) peuvent, sous l'action de l'élément de guidage (33), pivoter en direction de l'axe de rotation (16) en s'éloignant de la surface d'appui (15) ou pivoter vers celle-ci.
  3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que les éléments de serrage (21) peuvent, sous l'action de l'élément de guidage (33), être poussés en direction radiale vers l'axe de rotation (16) et la surface d'appui (15) du disque d'entraînement (13).
  4. Dispositif selon la revendication 2, caractérisé en ce que l'élément de guidage (33) présente une surface de guidage (35) pour faire pivoter l'élément de serrage (21) depuis une position d'ouverture dans une position de fermeture, dans laquelle la surface de serrage (26) est située au-dessus de la surface d'appui (15), à une distance (d) ne provoquant pas le blocage de la bande (4).
  5. Dispositif selon la revendication 3, caractérisé en ce que l'élément de guidage (33) présente une surface de guidage (41) pour guider l'élément de serrage (21) de manière que sa surface de serrage (26) soit à une distance prédéterminée (d) de la surface d'appui (15).
  6. Dispositif selon la revendication 5, caractérisé en ce qu'au moins la surface de guidage (41) peut être poussée radialement au moyen d'un dispositif d'application (48), en direction de l'axe de rotation (16), contre la surface d'appui (15).
  7. Dispositif selon les revendications 4 et 5, caractérisé en ce que les surfaces de guidage (35, 41) présentent au moins une zone d'entrée (50) des éléments de serrage (21).
  8. Dispositif selon les revendications 4 et 5, caractérisé en ce que les surfaces de guidage (35, 41) présentent une zone de sortie (51).
  9. Dispositif selon la revendication 5 ou la revendication 6, caractérisé en ce que chaque élément de serrage (21) est guide sur au moins une surface de guidage (35, 41) au moyen d'au moins un galet de guidage respectif (36, 39).
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que chaque élément de serrage (21) s'appuie par l'intermédiaire d'un ressort (31, 32) sur le disque d'entraînement (13) dans la direction de pivotement et/ou en direction radiale par rapport à l'axe de rotation (16).
  11. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que chaque élément de serrage (21) est relie au disque d'entraînement (13) au moyen d'au moins une cheville d'entraînement (28).
  12. Dispositif selon la revendication 11, caractérisé en ce que chaque cheville d'entraînement (28) est guidée dans un trou oblong (27) s'étendant en direction radiale par rapport à l'axe de rotation (16).
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé en ce que chaque élément de serrage (21) est guide dans une rainure annulaire (20) du disque d'entraînement (13) pour pouvoir pivoter dans la direction de l'axe de rotation (16) et pour pouvoir coulisser en direction radiale par rapport à cet axe.
EP90118081A 1989-10-10 1990-09-20 Dispositif de tension pour lien d'emballage Expired - Lifetime EP0422427B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933756A DE3933756A1 (de) 1989-10-10 1989-10-10 Rueckspann-vorrichtung fuer ein verpackungs-band
DE3933756 1989-10-10

Publications (2)

Publication Number Publication Date
EP0422427A1 EP0422427A1 (fr) 1991-04-17
EP0422427B1 true EP0422427B1 (fr) 1993-08-25

Family

ID=6391157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90118081A Expired - Lifetime EP0422427B1 (fr) 1989-10-10 1990-09-20 Dispositif de tension pour lien d'emballage

Country Status (3)

Country Link
US (1) US5078058A (fr)
EP (1) EP0422427B1 (fr)
DE (2) DE3933756A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416013A1 (de) * 1994-05-06 1995-11-09 Georg Lang Vorrichtung zum Umreifen eines Packgutes
DE19602579A1 (de) * 1996-01-25 1997-07-31 Smb Schwede Maschinenbau Gmbh Rückspann-Vorrichtung für ein Umreifungsband
US5778643A (en) * 1996-03-14 1998-07-14 Officina Meccanica Sestese S.P.A. Device to control the feeding of the strap in a strapping machine
DE19652078A1 (de) * 1996-12-14 1998-06-18 Signode Bernpak Gmbh Vorrichtung zum Umreifen von Packstücken
US6463848B1 (en) * 2000-05-08 2002-10-15 Illinois Tool Works Inc. Strapper with improved winding and cutting assembly
DE10340310A1 (de) * 2003-09-02 2005-03-31 Signode Bernpak Gmbh Vorrichtung zum Umreifen von insbesondere kompressiblem Packgut wie Wellpappelagen od. dgl.
DE102011011627A1 (de) 2011-02-17 2012-08-23 Krones Aktiengesellschaft Vorrichtung und Verfahren zur Herstellung von umreiften Gebinden sowie Regelungs- und/oder Steuerungsverfahren für eine Umreifungsvorrichtung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US812677A (en) * 1905-07-03 1906-02-13 Knut Paulson Fish-net-lifting machine.
US1058156A (en) * 1912-09-04 1913-04-08 Edward Crossley Net-pulling machine.
US1565865A (en) * 1922-10-05 1925-12-15 Cary Mfg Co Package-binding implement
US1663154A (en) * 1924-12-09 1928-03-20 John W Bissett Pulley
FR658572A (fr) * 1928-01-23 1929-06-06 Stothert & Pitt Ltd Perfectionnements aux poulies pour câbles moteurs et analogues
US3146694A (en) * 1961-10-27 1964-09-01 Acme Steel Co Strapping method and apparatus
US3249335A (en) * 1964-10-28 1966-05-03 Eisenhauer Daniel Andrew Fish net lifting apparatus
US3752058A (en) * 1971-06-11 1973-08-14 Signode Corp Feed mechanism
DE3118712A1 (de) * 1981-05-12 1982-12-02 Cyklop International Emil Hoffmann KG, 5000 Köln Vorrichtung zum anlegen und spannen eines umreifungsbandes um ein packstueck
DE8234465U1 (de) * 1982-12-08 1984-03-22 Fa. August Thiele, 5860 Iserlohn Spannratsche fuer Rundstahlketten
DE3442126A1 (de) * 1984-11-17 1986-05-28 Joachim Ing.(grad.) 6270 Idstein Helff Federnder ausgleichsantrieb fuer umreifungsautomaten
US4605456A (en) * 1985-05-02 1986-08-12 Signode Corporation Method and apparatus for feeding and tensioning strap in a strapping machine
DD267093A1 (de) * 1987-12-16 1989-04-19 Orgreb Inst Kraftwerke Treibscheibentriebwerk

Also Published As

Publication number Publication date
DE59002463D1 (de) 1993-09-30
EP0422427A1 (fr) 1991-04-17
DE3933756A1 (de) 1991-04-18
US5078058A (en) 1992-01-07

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