EP2233402B1 - Device for strapping packing pieces - Google Patents
Device for strapping packing pieces Download PDFInfo
- Publication number
- EP2233402B1 EP2233402B1 EP20100156523 EP10156523A EP2233402B1 EP 2233402 B1 EP2233402 B1 EP 2233402B1 EP 20100156523 EP20100156523 EP 20100156523 EP 10156523 A EP10156523 A EP 10156523A EP 2233402 B1 EP2233402 B1 EP 2233402B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leaf spring
- spring elements
- strap
- channel
- flap element
- 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
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Classifications
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- 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
- B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
- B65B13/04—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes with means for guiding the binding material around the articles prior to severing from supply
- B65B13/06—Stationary ducts or channels
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- 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
- B65B13/185—Details of tools
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- 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
- B65B27/00—Bundling particular articles presenting special problems using string, wire, or narrow tape or band; Baling fibrous material, e.g. peat, not otherwise provided for
- B65B27/08—Bundling paper sheets, envelopes, bags, newspapers, or other thin flat articles
Definitions
- the invention relates to a device for strapping packages, comprising a band guide frame which surrounds the package at a distance during the strapping process and which has a band channel which has an opening to be opened and automatically closing on an inner side facing the package, at least over a partial length. which is attached to the tape guide frame and the tape channel at a distance from the outer channel bottom at least partially overlaps.
- Strapping machines with which packages such as newspaper stacks, packages or the like. can be provided with a strapping on a strapping, are known in various designs.
- strapping which is often made of plastic, injected into the arranged on the tape guide frame tape channel until the front end of the strapping enters a closure device and is held there. The rear end of the tape is then withdrawn, so that the strapping on the inside of the band channel emerges from this and lays around the package.
- the cover initially closes the band opening opens due to the force exerted on the strap during retraction tensile force. Once the tape has emerged from the tape channel, the cover closes itself again, so that after completion of the strapping device for re-shooting strapping tape is ready in the tape guide frame.
- the cover is formed by angle-shaped metal strips of short length, which on the two side walls of the tape guide frame are arranged in an articulated manner and are kept pressed by coil springs in a rest position closing the band guide channel, wherein they can tilt outward against the action of the coil springs, when the strapping band is pulled out of the band channel against the package and tensioned. Due to the many individual components with which the hinge flaps are articulated in the known machines on the tape guide frame and kept closed under spring bias, the assembly of the hinge flaps on the known tape guide frame is extremely expensive.
- US 5,414,980 discloses a device for strapping packages according to the preamble of claim 1.
- the object of the invention is to provide a device of the type mentioned, which has a very easy opening and reliable closing cover, the wear is considerably lower compared to the known devices and can be particularly easy to maintain if necessary.
- the cover has at least one flap element which is provided on one of its longitudinal sides with transversely to the longitudinal direction of the band channel vorkragend arranged leaf spring elements, with which it is attached to the tape guide frame.
- the arrangement can thus be made in a preferred manner in particular so that the forming between the tape guide frame and the flap element flap pivot axis is laterally adjacent to the band channel at a distance from this.
- the invention pursues the way, the pivotability of the flap elements and their Locking under spring force by the same components, namely the transversely - laterally and / or upwardly or downwardly - to ensure cantilevered leaf spring elements, whereby the number of required for the effective coverage of the band channel components is significantly reduced.
- the flap pivot axis formed by the leaf spring elements is no longer a rigid axis as in the hinged mounted, used in the past flaps, but is a virtual axis whose current position may vary depending on the degree of opening of the flap elements.
- this virtual pivot axis is located next to or below the band channel, at least at a distance from this and in many cases even outside the band guide frame, the between the point of the strapping on the flap elements when pulling out of the strapping band from the band channel and the (virtual ) Flap lever pivot lever lever lever comparatively large, which means that the force with which the strapping must be pulled out against the force exerted by the band spring elements tumble inward from the band channel, is low.
- the flaps thus open very easily against the action of the leaf spring elements and return after the emergence of the band from the band channel in their inwardly closing this initial position gently back again.
- the leaf spring elements have a spring clip projecting transversely to the longitudinal axis of the band channel and a spring tongue which springs back inward between the outer limbs of the spring clip and between its lateral limbs.
- the leaf spring elements are so to speak in two parts constructed with a first portion of the leaf spring forming, outer spring clip and the second leaf spring part, the is formed by the inner spring tongue which lies between the two legs of the spring clip.
- the effective length of the leaf spring element is determined by the lengths on the one hand of the spring clip and on the other hand, the spring tongue, measured transversely to the longitudinal direction of the band channel, so that the leaf spring elements actually project little laterally from the arranged in Band Replacementsrahmen channel, but nevertheless a relatively large, effective lever arm create when opening the flap elements, so that they can easily open when pulling out of the band, as described above.
- a bipartite of the leaf spring element can also be achieved by connecting two single-leaf springs at their outer end, for example by means of a rivet or a welding point , In this case, the leaf spring element sections are then one above the other and not next to each other.
- the flap member is preferably fixedly connected to the inner end portion of the spring clip of the leaf spring elements and the leaf spring elements are attached to the inner free ends of their spring tongues on the tape guide frame.
- the attachment can be done for example by blind rivets or preferably by screws, so that a later replacement of the flap element is easily possible.
- the flap element can also be firmly connected to the inner end of the spring tongue of the leaf spring elements and the leaf spring elements attached to the free ends of the lateral legs of their spring clip on the tape guide frame.
- leaf spring elements are configured in one piece with the flap element, which can be achieved particularly simply by producing the flap elements with the sheet spring elements formed thereon as stamped parts made from spring steel sheet.
- the leaf spring elements are also one Structure of the leaf spring elements of resilient plastic or a composite material possible.
- the flap element is aligned at an acute angle obliquely to the band channel bottom in the closed state of the cover, whereby the opening of the flap element is favored when pulling out of the band from the band channel.
- the tape guide frame preferably has two guide webs laterally delimiting the tape channel, it being possible for the flap element with its tape spring elements to be fastened to the one of the two guide webs.
- the guide web carrying the flap element may form an upper or a lateral attachment surface on which the spring tongue or the spring clip of the leaf spring elements is fixed, in particular screwed or riveted. If the mounting surface is oriented obliquely rising towards the band channel, thereby automatically the oblique arrangement of the flap element is effected relative to the band channel bottom.
- the invention provides a flap element for covering a belt channel arranged on a band guide frame of a strapping device, which is characterized by on one of its longitudinal sides transversely, in particular laterally projecting cantilevered leaf spring elements, by means of which the flap element is attachable to the strap guide frame that formed by the leaf spring elements , Virtual flap pivot axis is laterally adjacent to the band channel at a distance from this.
- a flap element is provided with the invention, which is designed in one piece with laterally on one of its longitudinal sides projecting leaf spring elements and thus particularly easy to manufacture and mount on the tape guide frame or can be dismantled again.
- strapping machine has in a basically known manner, a machine housing 11 which forms a work surface 12 on which a (not shown) package can be stored to be strapped.
- the machine is provided with an over the level of the work table 12 towering tape guide frame 13, the is covered with a sheet metal cover 14 in the illustrated embodiment.
- the tape guide frame 13 without the sheet metal cover is in Fig. 2 shown in more detail. It has a band channel 15 which is provided on a side facing the package 16 both at its two upstanding side legs 17, 18 and at the top, the side legs connecting cross-beam 19 with a cover 20 which the band channel at a distance from the outer channel bottom 21 overlaps and thereby normally keeps closed.
- a strapping band 22 is inserted from an intended, housed inside the machine housing unit starting from one end of the band channel in this and thereby arranged by the band guide frame around the package until the front end of the band at one below the work table 12 in Machine housing arranged clamping device arrives and can be detected by this.
- This distance is in the preferred embodiment, at least 1 cm, preferably, a distance of more than 2 cm.
- the invention does not necessarily have a flap pivot axis 26 which remains invariably relative to the strap guide frame in relation to the strap guide frame, but rather the pivot axis during the opening process of the flap elements relative to the strap guide frame and / or to the actual cover 20 forming, over the band channel lying portion 23a of the flap elements can change, which is due to the bending of the leaf spring elements during the opening of the flap elements.
- the leaf spring elements 25 are designed in one piece with the flap element 23 in that they are punched out together with it from a spring blank blank.
- the arrangement is made in the illustrated embodiments of the flap members so that each leaf spring member 25 a transversely to the band channel 15 forward or recessed, outer spring clip 27 and from the outer edge region 28 of the spring clip between its lateral legs 27a, b back inwardly spring tongue 29, which is thus limited to form a u- or meander-shaped gap 30 at its two longitudinal edges of the two spring legs 27a, b and at its free end of the cover forming part 23a of the flap member 23.
- the Bandfederlement is angled downward in such a position that they are parallel to the lateral Limiting surfaces 36 of the band channel 15 run.
- the attachment to the tape guide frame is not done here on the upper surface, but a lateral mounting surface 35 ', which runs parallel to the boundary surfaces 36 accordingly.
- the in the Fig. 8 The embodiment shown to some extent constitutes a synthesis of the two embodiments of flap elements according to FIGS Fig. 2 to 6 on the one hand and Fig. 7 on the other hand, by this third embodiment as the first embodiment is screwed to the upper mounting surface 35 of the tape guide frame, but that leaf spring element 25 is also angled downwards from the upper mounting surface as in the second embodiment.
- the middle spring tongue 29 has a kink, as can be clearly seen in the drawing.
- the particularly advantageous embodiment of the flap elements with the arranged thereon, transversely, in particular laterally projecting band spring parts ensure easy opening and subsequent reclosing of the flaps even at low tensile force of the strapping.
- the effective length of the leaf spring elements which corresponds to the pivot arm when the flap elements are pivoted about the flap pivot axis, in the illustrated embodiments is greater than the amount by which the leaf spring elements protrude laterally or outwardly from the tape guide frame.
- the effective pivot or lever arm substantially corresponds to the sum of the length of the spring tongue from its inner free end 31 to the outer edge region 28 and the length of the outer spring clip 27 from the outer edge region 28 inwardly to the part 23 a of the flap element, the Band channel 15 covers.
- the flap elements can be easily and quickly mounted on the strap guide frame and can be removed from the frame again, since only the screws inserted through the spring tongues 29 can be screwed in or out of threads provided on the attachment surface 35. Apart from a screwing tool are no other tools or aids required. An exchange of the flap elements is thus possible within a few minutes, if required, without the need for special knowledge or skills would be required.
- the locking torque that the leaf spring elements exert on the flap element is variable by bending the leaf spring elements within certain limits, so that adjustability of the force at which the flap elements open as a result of tightening the strapping band can be adjusted.
- the contact pressure of the flap element on the guide webs 32, 33 of the band channel 15 and the required retention can be influenced.
- the wear in the cover of the tape channel according to the invention is considerably reduced compared to the known flap systems, maintenance of the system are only displayed at long intervals, if they are even necessary.
- the invention is not limited to the illustrated and described embodiment, but various changes or additions are conceivable without departing from the scope of the invention.
- the preferred bipartite nature of the leaf spring elements which is achieved in the illustrated embodiment by the outer spring clip 27 and the inner spring tongue 29, also be realized by two leaf spring parts arranged one above the other and firmly connected at their respective outer ends, for example, riveted or welded become. It is also possible to provide the band guide frame laterally projecting, substantially rigid holding leg, at the outer end then the leaf spring elements can be attached.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Umreifen von Packstücken, mit einem Bandführungsrahmen, der das Packstück während des Umreifungsvorgangs mit Abstand umgibt und der einen Bandkanal aufweist, der an einer zum Packstück zugewandten Innenseite wenigstens über eine Teillänge eine zu öffnende und sich selbsttätig schließende Abdeckung aufweist, die am Bandführungsrahmen befestigt ist und den Bandkanal in einem Abstand von dessen außen liegenden Kanalboden mindestens teilweise übergreift.The invention relates to a device for strapping packages, comprising a band guide frame which surrounds the package at a distance during the strapping process and which has a band channel which has an opening to be opened and automatically closing on an inner side facing the package, at least over a partial length. which is attached to the tape guide frame and the tape channel at a distance from the outer channel bottom at least partially overlaps.
Umreifungsmaschinen, mit denen Packstücke wie beispielsweise Zeitungsstapel, Pakete o.dgl. mit einer Umreifung an einem Umreifungsband versehen werden können, sind in verschiedenen Ausführungen bekannt. Bei solchen Umreifungsmaschinen wird das Umreifungsband, das häufig aus Kunststoff besteht, in den am Bandführungsrahmen angeordneten Bandkanal eingeschossen, bis das vordere Ende des Umreifungsbandes in eine Verschlussvorrichtung einläuft und dort festgehalten wird. Das rückwärtige Bandende wird dann wieder zurückgezogen, so dass das Umreifungsband an der Innenseite des Bandkanals aus diesem austritt und sich um das Packstück legt. Dabei öffnet sich die den Bandkanal zunächst verschließende Abdeckung infolge der auf das Umreifungsband beim Zurückziehen ausgeübten Zugkraft. Sobald das Band aus dem Bandkanal ausgetreten ist, schließt sich die Abdeckung von selbst wieder, so dass nach Fertigstellung der Umreifung die Vorrichtung zum erneuten Einschießen von Umreifungsband in den Bandführungsrahmen bereit ist.Strapping machines, with which packages such as newspaper stacks, packages or the like. can be provided with a strapping on a strapping, are known in various designs. In such strapping machines strapping, which is often made of plastic, injected into the arranged on the tape guide frame tape channel until the front end of the strapping enters a closure device and is held there. The rear end of the tape is then withdrawn, so that the strapping on the inside of the band channel emerges from this and lays around the package. In this case, the cover initially closes the band opening opens due to the force exerted on the strap during retraction tensile force. Once the tape has emerged from the tape channel, the cover closes itself again, so that after completion of the strapping device for re-shooting strapping tape is ready in the tape guide frame.
Bei den meisten Umreifungsvorrichtungen der gattungsgemäßen Art wird die Abdeckung durch winkelförmige Metallleisten kurzer Länge gebildet, die an den beiden Seitenwänden des Bandführungsrahmens gelenkig angeordnet sind und von Schraubenfedern in eine den Bandführungskanal verschließende Ruhestellung gedrückt gehalten werden, wobei sie entgegen der Wirkung der Schraubenfedern nach außen kippen können, wenn das Umreifungsband aus dem Bandkanal heraus gegen das Packstück zusammengezogen und gespannt wird. Aufgrund der vielen einzelnen Komponenten, mit denen die Bandklappen bei den bekannten Maschinen am Bandführungsrahmen gelenkig gelagert und unter Federvorspannung geschlossen gehalten werden, ist die Montage der Bandklappen an den bekannten Bandführungsrahmen außerordentlich aufwendig. Um einen gleichmäßigen Anpressdruck der Klappen in ihrer den Bandkanal nach innen abdeckenden Schließstellung zu erreichen, müssen besondere Maßnahmen getroffen werden, um eine einheitliche Federvorspannung der die Klappen verschließenden Schraubendruckfedern zu gewährleisten. Die bekannten Klappen unterliegen einem sehr hohen Verschleiß und bei Erreichen der Verschleißgrenze kommt es zu erheblichen Störungen beim Einschiessen des Umreifungsbandes in den Bandkanal und Herausziehen während des Spannvorganges, was eine aufwendige Wartung erforderlich macht.In most strapping devices of the generic type, the cover is formed by angle-shaped metal strips of short length, which on the two side walls of the tape guide frame are arranged in an articulated manner and are kept pressed by coil springs in a rest position closing the band guide channel, wherein they can tilt outward against the action of the coil springs, when the strapping band is pulled out of the band channel against the package and tensioned. Due to the many individual components with which the hinge flaps are articulated in the known machines on the tape guide frame and kept closed under spring bias, the assembly of the hinge flaps on the known tape guide frame is extremely expensive. In order to achieve a uniform contact pressure of the flaps in their the band channel inwardly covering the closed position, special measures must be taken to ensure a uniform spring preload of the flaps closing helical compression springs. The known flaps are subject to very high wear and when reaching the wear limit, there are significant disturbances when shooting the strap in the band channel and pulling out during the clamping process, which makes a complex maintenance required.
Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs genannten Art zu schaffen, die eine sich sehr leicht öffnende und zuverlässig schließende Abdeckung hat, deren Verschleiß im Vergleich zu den bekannten Vorrichtungen erheblich geringer ist und die sich bei Bedarf besonders einfach warten lässt.The object of the invention is to provide a device of the type mentioned, which has a very easy opening and reliable closing cover, the wear is considerably lower compared to the known devices and can be particularly easy to maintain if necessary.
Diese Aufgabe wird mit der Erfindung dadurch gelöst, dass die Abdeckung mindestens ein Klappenelement aufweist, das an einer seiner Längsseiten mit quer zur Längsrichtung des Bandkanals vorkragend angeordneten Blattfederelementen versehen ist, mit denen es am Bandführungsrahmen angebracht ist. Die Anordnung kann damit in bevorzugter Weise insbesondere so getroffen werden, dass die sich zwischen dem Bandführungsrahmen und dem Klappenelement ausbildende Klappenschwenkachse seitlich neben dem Bandkanal im Abstand von diesem liegt.This object is achieved with the invention in that the cover has at least one flap element which is provided on one of its longitudinal sides with transversely to the longitudinal direction of the band channel vorkragend arranged leaf spring elements, with which it is attached to the tape guide frame. The arrangement can thus be made in a preferred manner in particular so that the forming between the tape guide frame and the flap element flap pivot axis is laterally adjacent to the band channel at a distance from this.
Anders als bei den bekannten Vorrichtungen, bei denen die Klappenelemente ähnlich wie ein Bandscharnier um seitlich unmittelbar neben dem Bandkanal angeordnete Schwenk- oder Klappachsen gelagert wurden und mittels zusätzlicher Federelemente in ihre Schließlage gedrückt wurden, verfolgt die Erfindung den Weg, die Verschwenkbarkeit der Klappenelemente und deren Zuhaltung unter Federkraft durch dieselben Bauteile, nämlich die quer - seitlich und/oder nach oben oder unten - vorkragenden Blattfederelemente zu gewährleisten, womit die Zahl der für die wirksame Abdeckung des Bandkanals erforderlichen Bauteile erheblich reduziert ist. Die von den Blattfederelementen gebildete Klappenschwenkachse ist keine starre Achse mehr wie bei den scharnierartig gelagerten, in der Vergangenheit zum Einsatz kommenden Klappen, sondern ist eine virtuelle Achse, deren momentane Lage sich abhängig vom Öffnungsgrad der Klappenelemente verändern kann. Da sich diese virtuelle Schwenkachse neben oder auch unterhalb des Bandkanals, jedenfalls im Abstand von diesem befindet und in vielen Fällen sogar ganz außerhalb des Bandführungsrahmens liegt, ist der zwischen dem Angriffspunkt des Umreifungsbandes an den Klappenelementen beim Herausziehen des Umreifungsbandes aus dem Bandkanal und der (virtuellen) Klappenschwenkachse wirksame Hebelarm vergleichsweise groß, was bedeutet, dass die Kraft, mit der das Umreifungsband gegen das von den Bandfederelementen ausgeübte Zuhaltemoment nach innen aus dem Bandkanal herausgezogen werden muss, nur gering ist. Die Klappen öffnen sich also entgegen der Wirkung der Blattfederelemente sehr leicht und kehren nach dem Austreten des Bandes aus dem Bandkanal in ihre diesen nach innen verschließende Ausgangsstellung sanft wieder zurück.Unlike in the known devices in which the flap elements were mounted similar to a hinge hinge arranged laterally adjacent to the band channel swivel or folding axes and were pressed by means of additional spring elements in their closed position, the invention pursues the way, the pivotability of the flap elements and their Locking under spring force by the same components, namely the transversely - laterally and / or upwardly or downwardly - to ensure cantilevered leaf spring elements, whereby the number of required for the effective coverage of the band channel components is significantly reduced. The flap pivot axis formed by the leaf spring elements is no longer a rigid axis as in the hinged mounted, used in the past flaps, but is a virtual axis whose current position may vary depending on the degree of opening of the flap elements. Since this virtual pivot axis is located next to or below the band channel, at least at a distance from this and in many cases even outside the band guide frame, the between the point of the strapping on the flap elements when pulling out of the strapping band from the band channel and the (virtual ) Flap lever pivot lever lever lever comparatively large, which means that the force with which the strapping must be pulled out against the force exerted by the band spring elements tumble inward from the band channel, is low. The flaps thus open very easily against the action of the leaf spring elements and return after the emergence of the band from the band channel in their inwardly closing this initial position gently back again.
Eine besonders vorteilhafte, platzsparende Ausgestaltung ergibt sich, wenn die Blattfederelemente einen quer zur Längsachse des Bandkanals vorspringenden Federbügel und eine vom äußeren Randbereich des Federbügels zwischen dessen seitlichen Schenkeln nach innen zurückspringende Federzunge aufweisen. Bei dieser Ausgestaltung sind die Blattfederelemente also gewissermaßen zweiteilig aufgebaut mit dem einen ersten Abschnitt der Blattfeder bildenden, äußeren Federbügel und dem zweiten Blattfederteil, das von der inneren Federzunge gebildet wird, die zwischen den beiden Schenkeln des Federbügels liegt. Die wirksame Länge des Blattfederelements wird dabei bestimmt durch die Längen einerseits des Federbügels und andererseits der Federzunge, gemessen quer zur Längsrichtung des Bandkanals, so dass die Blattfederelemente tatsächlich nur wenig seitlich vom im Bandführungsrahmen angeordneten Kanal vorkragen, dabei aber gleichwohl einen vergleichsweise großen, wirksamen Hebelarm beim Öffnen der Klappenelemente schaffen, so dass diese beim Herausziehen des Bandes, wie zuvor beschrieben, leicht öffnen können. Alternativ zu dieser Gestaltung, bei der der äußere Federbügel und die innere Federzunge von einem diese mäanderförmig umgebenden Schlitz getrennt sind, kann eine Zweiteiligkeit des Blattfederelementes auch dadurch erreicht werden, dass zwei Einzelblattfedern an ihrem äußeren Ende beispielsweise mittels eines Niets oder eines Schweißpunkts miteinander verbunden werden. In diesem Fall liegen die Blattfederelementabschnitte dann übereinander und nicht nebeneinander.A particularly advantageous, space-saving design results when the leaf spring elements have a spring clip projecting transversely to the longitudinal axis of the band channel and a spring tongue which springs back inward between the outer limbs of the spring clip and between its lateral limbs. In this embodiment, the leaf spring elements are so to speak in two parts constructed with a first portion of the leaf spring forming, outer spring clip and the second leaf spring part, the is formed by the inner spring tongue which lies between the two legs of the spring clip. The effective length of the leaf spring element is determined by the lengths on the one hand of the spring clip and on the other hand, the spring tongue, measured transversely to the longitudinal direction of the band channel, so that the leaf spring elements actually project little laterally from the arranged in Bandführungsrahmen channel, but nevertheless a relatively large, effective lever arm create when opening the flap elements, so that they can easily open when pulling out of the band, as described above. As an alternative to this design, in which the outer spring clip and the inner spring tongue are separated by a meander-shaped slot, a bipartite of the leaf spring element can also be achieved by connecting two single-leaf springs at their outer end, for example by means of a rivet or a welding point , In this case, the leaf spring element sections are then one above the other and not next to each other.
Das Klappenelement ist vorzugsweise am inneren Endbereich des Federbügels der Blattfederelemente an diesen fest angeschlossen und die Blattfederelemente sind an den innen liegenden freien Enden ihrer Federzungen am Bandführungsrahmen befestigt. Die Befestigung kann beispielsweise durch Blindniete oder bevorzugt durch Schrauben erfolgen, so dass ein späterer Austausch des Klappenelementes problemlos möglich ist. Natürlich kann das Klappenelement auch am innen liegenden Ende der Federzunge der Blattfederelemente an diesen fest angeschlossen sein und die Blattfederelemente an den freien Enden der seitlichen Schenkel ihres Federbügels am Bandführungsrahmen befestigt sein.The flap member is preferably fixedly connected to the inner end portion of the spring clip of the leaf spring elements and the leaf spring elements are attached to the inner free ends of their spring tongues on the tape guide frame. The attachment can be done for example by blind rivets or preferably by screws, so that a later replacement of the flap element is easily possible. Of course, the flap element can also be firmly connected to the inner end of the spring tongue of the leaf spring elements and the leaf spring elements attached to the free ends of the lateral legs of their spring clip on the tape guide frame.
Konstruktiv besonders vorteilhaft ist es, wenn die Blattfederelemente einstückig mit dem Klappenelement ausgestaltet sind, was man besonders einfach dadurch erreichen kann, dass die Klappenelemente mit den daran angeformten Blattfederelementen als Stanzteile aus Federblech hergestellt werden. Gleichsam ist auch ein Aufbau der Blattfederelemente aus federelastischem Kunststoff oder einem Verbundwerkstoff möglich.Particularly advantageous in terms of construction is when the leaf spring elements are configured in one piece with the flap element, which can be achieved particularly simply by producing the flap elements with the sheet spring elements formed thereon as stamped parts made from spring steel sheet. As it is also one Structure of the leaf spring elements of resilient plastic or a composite material possible.
Vorteilhaft ist es weiter, wenn das Klappenelement im geschlossenen Zustand der Abdeckung unter einem spitzen Winkel schräg zum Bandkanalboden ausgerichtet ist, womit das Öffnen des Klappenelementes beim Herausziehen des Bandes aus dem Bandkanal begünstigt wird.It is also advantageous if the flap element is aligned at an acute angle obliquely to the band channel bottom in the closed state of the cover, whereby the opening of the flap element is favored when pulling out of the band from the band channel.
Der Bandführungsrahmen weist vorzugsweise zwei den Bandkanal seitlich begrenzende Führungsstege auf, wobei das Klappenelement mit seinen Bandfederelementen an dem einen der beiden Führungsstege befestigt sein kann. Hierzu kann der das Klappenelement tragende Führungssteg eine obere oder eine seitliche Befestigungsfläche bilden, an der die Federzunge oder der Federbügel der Blattfederelemente festgelegt, insbesondere angeschraubt oder angenietet ist. Wenn die Befestigungsfläche zum Bandkanal hin schräg ansteigend ausgerichtet ist, wird hierdurch automatisch die schräge Anordnung des Klappenelementes relativ zum Bandkanalboden bewirkt.The tape guide frame preferably has two guide webs laterally delimiting the tape channel, it being possible for the flap element with its tape spring elements to be fastened to the one of the two guide webs. For this purpose, the guide web carrying the flap element may form an upper or a lateral attachment surface on which the spring tongue or the spring clip of the leaf spring elements is fixed, in particular screwed or riveted. If the mounting surface is oriented obliquely rising towards the band channel, thereby automatically the oblique arrangement of the flap element is effected relative to the band channel bottom.
Mit der Erfindung wird ein Klappenelement zur Abdeckung eines an einem Bandführungsrahmen einer Umreifungsvorrichtung angeordneten Bandkanals geschaffen, das gekennzeichnet ist durch an einer seiner Längsseiten quer, insbesondere seitlich vorkragend angeordnete Blattfederelemente, mittels derer das Klappenelement so am Bandführungsrahmen anbringbar ist, dass die von den Blattfederelementen gebildete, virtuelle Klappenschwenkachse seitlich neben dem Bandkanal im Abstand von diesem liegt. Insbesondere wird mit der Erfindung ein Klappenelement geschaffen, das einstückig mit seitlich an einer seiner Längsseiten vorkragend angeordneten Blattfederelementen ausgestaltet ist und sich somit besonders einfach herstellen und am Bandführungsrahmen montieren oder auch wieder abbauen lässt.The invention provides a flap element for covering a belt channel arranged on a band guide frame of a strapping device, which is characterized by on one of its longitudinal sides transversely, in particular laterally projecting cantilevered leaf spring elements, by means of which the flap element is attachable to the strap guide frame that formed by the leaf spring elements , Virtual flap pivot axis is laterally adjacent to the band channel at a distance from this. In particular, a flap element is provided with the invention, which is designed in one piece with laterally on one of its longitudinal sides projecting leaf spring elements and thus particularly easy to manufacture and mount on the tape guide frame or can be dismantled again.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und der Zeichnung, worin eine bevorzugte Ausführungsform der Erfindung anhand eines Beispiels näher dargestellt und erläutert ist. Es zeigt:
- Fig. 1
- eine Umreifungsmaschine für Packstücke in perspektivischer Darstellung;
- Fig. 2
- einen Bandführungsrahmen der Umreifungsmaschine nach
Fig. 1 in perspektivischer Darstellung; - Fig. 3
- eine Einzelheit des Bandführungsrahmens nach
Fig. 2 im Bereich eines der beiden vertikalen Schenkel mit einer ersten Ausführungsform eines daran angeordneten, erfindungsgemäßen Klappenelements im geschlossenen Zustand in perspektivischer Darstellung; - Fig. 4
- den Gegenstand der
Fig. 3 bei geöffneter Klappe beim Austritt des Umreifungsbandes aus dem Bandkanal; - Fig. 5
- das an dem Bandkanalabschnitt der
Fig. 3 und4 angebrachte Klappenelement in einer Draufsicht; - Fig. 6
- eine Einzelheit VI nach
Fig. 5 im Bereich eines der Blattfederelemente des Klappenelements; - Fig. 7
- eine zweite Ausführungsform des Klappenelements in perspektivischer Darstellung; und
- Fig. 8
- eine dritte Ausführungsform des Klappenelements in einer
Fig. 7 entsprechenden Darstellung.
- Fig. 1
- a strapping machine for packages in perspective view;
- Fig. 2
- a tape guide frame of the strapping machine according to
Fig. 1 in perspective view; - Fig. 3
- a detail of the tape guide frame
Fig. 2 in the region of one of the two vertical legs with a first embodiment of a flap element according to the invention arranged thereon in the closed state in a perspective view; - Fig. 4
- the object of
Fig. 3 with flap open at the exit of the strapping band from the band channel; - Fig. 5
- at the band channel section of
Fig. 3 and4 attached flap element in a plan view; - Fig. 6
- a detail VI after
Fig. 5 in the region of one of the leaf spring elements of the flap element; - Fig. 7
- a second embodiment of the flap element in a perspective view; and
- Fig. 8
- a third embodiment of the flap element in a
Fig. 7 corresponding representation.
Die in
Der Bandführungsrahmen 13 ohne die Blechabdeckung ist in
Wie die
In diesem Zusammenhang ist festzustellen, dass die Erfindung nicht zwingend ein in ihrer Zuordnung oder Lage relativ zum Bandführungsrahmen unveränderlich bleibende Klappenschwenkachse 26 hat, sondern die Schwenkachse während des Öffnungsvorganges der Klappenelemente ihre Lage relativ zum Bandführungsrahmen und/oder zu dem die eigentliche Abdeckung 20 bildenden, über dem Bandkanal liegenden Teil 23a der Klappenelemente verändern kann, was auf das Verbiegen der Blattfederelemente während des Öffnens der Klappenelemente zurückzuführen ist.In this connection, it should be noted that the invention does not necessarily have a
Wie man aus den Zeichnungen ferner gut erkennen kann, sind die Blattfederelemente 25 einstückig mit dem Klappenelement 23 ausgestaltet, indem sie gemeinsam mit diesem aus einem Federblechrohling ausgestanzt sind. Die Anordnung ist bei den dargestellten Ausführungsbeispielen der Klappenelemente so getroffen, dass jedes Blattfederelement 25 einen quer zum Bandkanal 15 vor- bzw. zurückspringenden, äußeren Federbügel 27 und eine vom äußeren Randbereich 28 des Federbügels zwischen dessen seitlichen Schenkeln 27a, b wieder nach innen zurückspringende Federzunge 29 aufweist, die somit unter Bildung eines u- oder mäanderförmigen Spalts 30 an ihren beiden Längskanten von den beiden Federschenkeln 27a, b und an ihrem freien Ende von dem die Abdeckung bildenden Teil 23a des Klappenelements 23 begrenzt wird. An dem innen liegenden, freien Ende 31 der Federzunge sind die Blattfederelemente 25 am Bandführungsrahmen 13 an einem von zwei den Bandkanal 15 seitlich begrenzenden Führungsstegen 32, 33 mit Halteschrauben 34 befestigt. Der Führungssteg 32, der die Klappenelemente 23 trägt, weist hierzu beim ersten Ausführungsbeispiel gem.
Bei dem in
Die in der
Die besonders vorteilhafte Ausbildung der Klappenelemente mit den daran angeordneten, quer, insbesondere seitlich vorspringenden Bandfederteilen gewährleisten schon bei geringer Zugkraft des Umreifungsbandes ein leichtes Öffnen und anschließendes Wiederverschließen der Klappen. Dabei ist die wirksame Länge der Blattfederelemente, die dem Schwenkarm beim Aufklappen der Klappenelemente um die Klappenschwenkachse entspricht, bei den dargestellten Ausführungsbeispielen größer als der Betrag, um den die Blattfederelemente seitlich bzw. nach außen vom Bandführungsrahmen auskragen. Tatsächlich entspricht der wirksame Schwenk- oder Hebelarm im Wesentlichen der Summe der Länge der Federzunge von ihrem inneren freien Ende 31 bis zum äußeren Randbereich 28 und der Länge des äußeren Federbügels 27 vom äußeren Randbereich 28 nach innen bis zu dem Teil 23a des Klappenelements, das den Bandkanal 15 abdeckt.The particularly advantageous embodiment of the flap elements with the arranged thereon, transversely, in particular laterally projecting band spring parts ensure easy opening and subsequent reclosing of the flaps even at low tensile force of the strapping. In this case, the effective length of the leaf spring elements, which corresponds to the pivot arm when the flap elements are pivoted about the flap pivot axis, in the illustrated embodiments is greater than the amount by which the leaf spring elements protrude laterally or outwardly from the tape guide frame. In fact, the effective pivot or lever arm substantially corresponds to the sum of the length of the spring tongue from its inner
Man erkennt auch, dass sich die Klappenelemente am Bandführungsrahmen problemlos und schnell montieren und vom Rahmen auch wieder abbauen lassen, denn hierzu sind nur die durch die Federzungen 29 gesteckten Schrauben in an der Befestigungsfläche 35 vorgesehene Gewinde ein- oder auszuschrauben. Abgesehen von einem Schraubwerkzeug sind keine weiteren Werkzeuge oder Hilfsmittel erforderlich. Ein Austausch der Klappenelemente ist somit bei Bedarf innerhalb weniger Minuten möglich, ohne dass hierfür besondere Kenntnisse oder Fähigkeiten erforderlich wären.It can also be seen that the flap elements can be easily and quickly mounted on the strap guide frame and can be removed from the frame again, since only the screws inserted through the
Das Zuhaltemoment, dass die Blattfederelemente auf das Klappenelement ausüben, ist durch Verbiegen der Blattfederelemente in gewissen Grenzen veränderlich, so dass eine Einstellbarkeit der Kraft, bei der sich die Klappenelemente infolge des Spannens des Umreifungsbandes öffnen, angepasst werden kann. Je nachdem, welche Abmessungen man für die Blattfederelemente und/oder den darin ausgestanzten Spalt 30 vorsieht, kann man den Anpressdruck des Klappenelements auf die Führungsstege 32, 33 des Bandkanals 15 sowie die erforderliche Rückhaltung beeinflussen. Der Verschleiß bei der erfindungsgemäßen Abdeckung des Bandkanals ist im Vergleich zu den bekannten Klappensystemen erheblich reduziert, Wartungen des Systems sind nur noch in langen Zeitabständen angezeigt, sofern sie überhaupt noch notwendig sind.The locking torque that the leaf spring elements exert on the flap element is variable by bending the leaf spring elements within certain limits, so that adjustability of the force at which the flap elements open as a result of tightening the strapping band can be adjusted. Depending on which dimensions are provided for the leaf spring elements and / or the
Die Erfindung ist nicht auf das dargestellte und beschriebene Ausführungsbeispiel beschränkt, sondern es sind verschiedene Änderungen oder Ergänzungen denkbar, ohne den Rahmen der Erfindung zu verlassen. So kann die bevorzugte Zweiteiligkeit der Blattfederelemente, die bei dem dargestellten Ausführungsbeispiel durch den äußeren Federbügel 27 und die innere Federzunge 29 erreicht wird, auch dadurch verwirklicht werden, dass zwei Blattfederteile übereinanderliegend angeordnet und an ihren jeweils äußeren Enden fest miteinander verbunden, beispielsweise vernietet oder verschweißt werden. Es ist auch möglich, am Bandführungsrahmen seitlich vorkragende, im Wesentlichen starre Halteschenkel vorzusehen, an deren äußeren Ende dann die Blattfederelemente befestigt werden können.The invention is not limited to the illustrated and described embodiment, but various changes or additions are conceivable without departing from the scope of the invention. Thus, the preferred bipartite nature of the leaf spring elements, which is achieved in the illustrated embodiment by the
Claims (13)
- Device for strapping packages, having a strap guiding frame (13) which surrounds the package at a spacing therefrom during the strapping process and which comprises a strap channel (15) that comprises, on an inner side facing the package, at least over a partial length (16), a cover (20) which is to be opened and which closes automatically, which is attached to the strap guiding frame (13) and at least partially overlaps the strap channel (15) at a spacing from the externally located channel base thereof, characterised in that the cover (20) comprises at least one flap element (23) which is provided on one of its longitudinal sides (24) with leaf spring elements (25) arranged to project transversely with respect to the longitudinal direction of the strap channel (15), by means of which the flap element (23) is mounted to the strap guiding frame (13).
- Device according to claim 1, characterised in that the flap pivot axis (26) formed between the strap guiding frame (13) and the flap element (23) is located laterally adjacent to the strap channel (15) at a spacing (a) therefrom.
- Device according to claim 1 or 2, characterised in that the leaf spring elements (25) comprise a spring shackle (27) projecting transversely with respect to the longitudinal axis of the strap channel (15), and a spring tongue (29) which is recessed inwardly from the outer edge region (28) of the spring shackle (27) between the lateral members (27a, 27b) thereof.
- Device according to claim 3, characterised in that the flap element (23) is fixedly attached to the leaf spring elements, at the inner end regions of the lateral members of the spring shackle (27) of the leaf spring elements, and the leaf spring elements (23) are attached to the strap guiding frame (13) by the inwardly located free ends (31) of their spring tongues (29).
- Device according to claim 3, characterised in that the flap element (23) is fixedly connected to the leaf spring elements at the inwardly located end of the spring tongue of said leaf spring elements and the leaf spring elements are attached to the strap guiding frame by the free ends of the lateral members of their spring shackle.
- Device according to one of claims 1 to 5, characterised in that the leaf spring elements (25) are formed in one piece with the flap element (23).
- Device according to one of claims 1 to 6, characterised in that the leaf spring elements (25) are made from spring steel or springy plastics.
- Device according to one of claims 1 to 7, characterised in that in the closed state of the cover (20) the flap element (23) is aligned at an acute angle to the base of the strap channel (21).
- Device according to one of claims 1 to 8, characterised in that the strap guiding frame (13) comprises two guide bars (32, 33) that laterally delimit the strap channel (15).
- Device according to claim 9, characterised in that the flap element (23) is secured with its leaf spring elements (25) to one of the two guide bars (32).
- Device according to claim 10, characterised in that the guide bar (32) that carries the flap element (23) forms an upper or lateral fixing surface (35) to which the spring tongue (29) or the spring shackle (27) of the leaf spring elements (25) is secured, particularly screwed or riveted on.
- Device according to claim 11, characterised in that the fixing surface (35) is directed towards the strap channel in obliquely ascending manner.
- Device according to claim 11, characterised in that the fixing surface (35) extends at least substantially parallel to lateral boundary walls of the strap channel (15).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009003665 | 2009-03-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2233402A2 EP2233402A2 (en) | 2010-09-29 |
EP2233402A3 EP2233402A3 (en) | 2012-11-21 |
EP2233402B1 true EP2233402B1 (en) | 2013-09-18 |
Family
ID=42357746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20100156523 Not-in-force EP2233402B1 (en) | 2009-03-24 | 2010-03-15 | Device for strapping packing pieces |
Country Status (1)
Country | Link |
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EP (1) | EP2233402B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103964012A (en) * | 2014-05-08 | 2014-08-06 | 李培培 | Guiding device for nylon cable ties of automatic packing machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2905346B2 (en) * | 1992-11-05 | 1999-06-14 | ストラパック株式会社 | Band guide arch in packing machine |
DE19912940A1 (en) * | 1999-03-23 | 2000-09-28 | Cyklop Gmbh | Device for strapping packages and profile strip, in particular for covering the band channel of the package strapping device |
US6904739B2 (en) * | 2002-11-27 | 2005-06-14 | Illinois Tool Works, Inc. | Strapping machine with modular control enclosure |
DE202007000216U1 (en) * | 2007-01-08 | 2007-03-15 | JANGZIN INDUSTRIAL Co., Ltd., Taiping City | Strap rail structure of frame shaped holder for strapping machine, has lower arc-shaped strap guide channel which consists of arc-shaped strap rail of connecting profile and of side part |
-
2010
- 2010-03-15 EP EP20100156523 patent/EP2233402B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
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EP2233402A3 (en) | 2012-11-21 |
EP2233402A2 (en) | 2010-09-29 |
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