EP0753460A1 - End stop - Google Patents
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- Publication number
- EP0753460A1 EP0753460A1 EP96106417A EP96106417A EP0753460A1 EP 0753460 A1 EP0753460 A1 EP 0753460A1 EP 96106417 A EP96106417 A EP 96106417A EP 96106417 A EP96106417 A EP 96106417A EP 0753460 A1 EP0753460 A1 EP 0753460A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stop piece
- lead screw
- helical compression
- compression spring
- base plate
- 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.)
- Granted
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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
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/12—Feeding webs from rolls
- B65B41/14—Feeding webs from rolls by grippers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/60—Biased catch or latch
- Y10T403/602—Biased catch or latch by separate spring
Definitions
- the invention relates to an annular stop piece for the moving spring end of a cylindrical helical compression spring overlapping a coaxial lead screw, the stop piece being provided axially oriented in a radial, concentric retaining groove of the lead screw, in particular for a tension piece which is loaded by the helical compression spring and can be released against its spring force on a conveyor chain for tensioning and subsequent transport of a packaging film web in a packaging machine, and a tensioning piece provided with such a stop piece.
- Link chains have proven particularly useful, each link being provided with a corresponding tensioning piece, which is opened when a first sprocket overflows, so that the edge of a packaging film web is gripped and tensioned, and in the same way when a second sprocket overflows is opened, whereby the (now processed) packaging film web is released.
- the tensioning pieces used and opening and / or closing when the sprockets overrun generally use tensioning elements which are moved against the force of helical compression springs by means of a pressure bolt when a sprocket is overrun. It goes without saying that the tensioning forces required for the packaging film webs must be chosen to be very large throughout in order to ensure proper clamping, during which a deformation of the packaging film web must also be possible.
- the movable spring end of the helical compression spring must therefore be intercepted by a high-strength stop piece.
- a snap ring in the lead screw against which this spring end rests. Snap rings are made entirely of elastic and non-rusting spring steel; if the packaged goods are food, the use of such a snap ring is not desirable for hygienic reasons.
- a snap ring does not offer sufficient Assurance that it does not come loose from the lead screw, for example, if it is installed incorrectly and is not provided with the necessary clamping force on the lead screw, which is also the case if the diameter at the base of the retaining groove is outside the required one for the snap ring Tolerance lies. Regardless of whether this diameter is too small or too large, the snap ring can then move away from the area of the lead screw during operation and conjure up the sudden relaxation of the clamping piece, which can damage the associated conveyor. Checking whether the snap ring is properly installed under pretension is not possible with simple means suitable for workshop operation or is too expensive. Proper assembly is therefore undesirably dependent on the skill and conscientiousness of the assembly personnel.
- the invention has therefore set itself the task of forming an annular stop piece of the type specified in the introduction so that it can be used without hesitation when it comes into contact with food, and furthermore, after its assembly with the lead screw, a very secure stop for the movable spring end of the helical compression spring forms, without having to make special demands on the skill and reliability of the assembly personnel; only its installation, for example in a clamping piece, should already provide the guarantee that the stop piece will reliably orient the movable spring end of the helical compression spring even with continuously high dynamic and thereby constantly changing loading and unloading and any length of operating time.
- stop piece should still be cheap to produce and require no additional space and assembly effort.
- the object is achieved in that the stop piece consists of a flat, circular base plate and a ring-cylindrical collar pointing at the outer edge of the base plate in the direction of the spring end and at least predominantly encompassing the spring end, and the inner edge bearing against the base of the retaining groove the base plate is connected to the outer edge by an insertion slot, the width of the insertion slot being adapted to the diameter at the base of the holding groove and being dimensioned such that the stop piece can just be pushed onto the base of the holding groove without jamming.
- the collar is formed by a flange on the outer edge of the base plate.
- Such a compact stop piece can be produced in a simple manner as a stamped and bent part and very inexpensively. It is held in place by the helical compression spring itself after it has been installed: the stop piece is only axially loaded by the spring force; lateral forces that may occur on it are unable to push the stop piece out of its central position because it is securely centered over the collar and the spring end. For this reason, complete assembly is also guaranteed with a high level of security: the spring end can only be (clearly visible!) Lowered into the collar on the base plate when the stopper with its insertion slot is inserted so far into the retaining groove that the inner edge of the Base plate is the base of the retaining groove immediately adjacent. If the assembly is incomplete, the spring end is not inside the collar, but lies on it, clearly visible, as an indication that the assembly has not been carried out properly.
- a hygienic design of the stop piece is ensured if it consists of a rustproof, nutritionally indifferent material, preferably steel.
- the deformation resistance of the stop piece which is determined by the dimension and material, is selected such that an elastic or permanent deformation is eliminated under the long-term influence of the helical compression spring.
- the prestressing force can be selected to be very high, so that a correspondingly high prestressing force can be generated if the stop piece is used, for example, on a tensioning piece which is loaded by the helical compression spring and can be released against its spring force.
- Such a tensioning piece in particular for use on a conveyor chain for tensioning and subsequently transporting a packaging film web in a packaging machine, is advantageously provided on a chain link of a conveyor chain designed as a link chain.
- the arrangement can expediently be such that the lead screw is axially movably mounted transversely to the conveying direction on a bearing block, which consists of a U-shaped holding bracket attached to the chain link and two bearing brackets, the helical compression spring also striking a bearing bracket apart from the stop piece , on the outside of which a clamping piece for the packaging film, which is integral with the lead screw, rests under the action of the helical compression spring and can be lifted off against the action of the helical compression spring if the lead screw is loaded on an axially aligned thrust pin which is guided through the other bearing bracket and overhanging it, for example from a ring saddle of a chain wheel for the link chain.
- Such an arrangement uses the stop piece according to the invention very advantageously and is itself of simple construction, so that tension pieces of this type can be cheaply produced in large numbers and attached to the chain links of the link chain.
- the requirements for the stop piece of the rigid design and the use of a stainless steel are met with very little effort, so that the clamping piece can be used as a whole even when packaging food.
- the width of the cold groove on the lead screw is at least equal to the thickness of the base plate, preferably but is at least slightly larger than this, and if the retaining groove on the lead screw is optionally provided such that the stop piece is at least slightly spaced from the second bearing plate when the clamping piece is in contact with the first bearing plate.
- the invention can always be used with advantage if very high pretensioning forces of the helical compression spring have to be mastered on clamping pieces of the type described; however, it is by no means limited to this.
- the stop piece according to the invention is generally suitable for locking a spring end of such a helical compression spring on a lead screw or the like.
- FIGS. 1 and 2 show a link chain GK suitable for driving a packaging film web in the region of a chain wheel mounted on a stationary shaft W.
- KR which is composed of chain links KG.
- a tensioning piece S is fastened to each chain link KG, as is explained in detail in FIGS. 3 and 4.
- the tensioning piece S consists of a bearing block 1 which can be fastened, for example riveted, to the associated chain link KG, a lead screw 2, a helical compression spring 3 and a stop piece 4 fastened to the lead screw 2.
- the U-shaped bearing block 1 folded out of sheet metal in the front view of FIG. 3 is composed in one piece from a holding plate 11 lying on the chain link KG and two parallel bearing plates 12a, 12b bent from the holding plate 11 at a distance a, which are used for storage serve the axially limited movable lead screw 2.
- a pressure pin 21 and, on the other hand, a clamping piece 22 is formed in a mushroom shape. While the clamping piece 22 rests on the first bearing plate 12a under the load of the helical compression spring 3 overlapping the lead screw 2 when the associated chain link KG is outside the area of the chain wheel KR, it can be lifted off the bearing plate 12a when the chain link KG is in this Area is pulled. As can easily be seen in FIG.
- the pressure pin 21 comes into the effective area of a ring saddle RS formed in one piece on the sprocket KR and is raised in this effective area against the spring force of the helical compression spring 3: for example, a packaging film web that is to be tensioned can now be between the clamping piece 22 and the bearing plate 12a introduced and when the chain link KG the area the sprocket KR has left again, be tensioned; Similarly, the removal of the packaging film web from the tensioning pieces S takes place on another chain wheel.
- a retaining groove 23 is recessed, in which the stop piece 4 is inserted axially locked.
- the helical compression spring 3 is clamped between the bearing bracket 12a and the stop piece 4 with a high preload.
- the holding groove 23 is determined by the diameter g of its base 23a and its depth t.
- the stop piece 4 shows how the stop piece 4 is inserted into the holding groove 23.
- the stop piece 4 is composed in one piece from an annular base plate 41 and a collar 42.
- the annular cylindrical collar 42 of height h folded out of the base plate 41 surrounds the movable spring end 31 of the helical compression spring 3, the other spring end 32 of which rests on the bearing bracket 12a.
- the details of the stop piece 4 are shown in Fig.5.
- An (inner) edge 43a of a central opening 43 adapted to the diameter g of the base 23a of the holding groove 23 is connected by an insertion slot 44 to the (outer) edge 41a of the base plate 41 and is otherwise semicircular, the width b of the insertion slot 44 is dimensioned so that the stop piece 4 can be inserted comfortably, but without much play in the holding groove 23.
- the assembly of the stop piece 4 is facilitated if the collar 42 ends symmetrically to the insertion slot 44, set back on both sides thereof.
- the so The recess 42a formed in the collar 42 here has a width k which is somewhat larger than the diameter f of the lead screw 2, so that jamming during assembly is avoided.
- the stop piece 4 is extremely stable due to the flanged collar 42. It is held securely in situ in the assembled state because of the spring end 31 which rests on the base plate 41 and is surrounded by the collar 42.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Unwinding Webs (AREA)
- Wire Bonding (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Adornments (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
Die Erfindung betrifft ein ringförmiges Anschlagstück für das bewegte Federende einer zylindrischen, eine koaxiale Führspindel überfangenden Schraubendruckfeder, wobei das Anschlagstück in einer radialen, konzentrischen Halterille der Führspindel, axial orientiert, vorgesehen ist, insbesondere für ein von der Schraubendruckfeder belastetes, gegen deren Federkraft lösbares Spannstück an einer Förderkette zum Spannen und anschließenden Transport einer Verpackungsfolienbahn in einer Verpackungsmaschine, sowie ein mit einem derartigen Anschlagstück versehenes Spannstück.The invention relates to an annular stop piece for the moving spring end of a cylindrical helical compression spring overlapping a coaxial lead screw, the stop piece being provided axially oriented in a radial, concentric retaining groove of the lead screw, in particular for a tension piece which is loaded by the helical compression spring and can be released against its spring force on a conveyor chain for tensioning and subsequent transport of a packaging film web in a packaging machine, and a tensioning piece provided with such a stop piece.
Vor allem beim Transportieren von miteinander verschweißbaren Verpackungsfolienbahnen, bei denen Packungsgut zwischen einer Unter- und einer Oberfolie abgemessen zugeführt und durch deren Verschweißen in verkaufsfähige Portionen konfektioniert wird, ist es erforderlich, die Verpackungsfolienbahnen straff zu spannen und sie dabei gleichzeitig zu fördern, wie das beispielsweise in der Offenlegungsschrift DE 24 30 497 beschrieben ist. Das beständig wechselnde Spannen und Freigeben der Verpackungsfolienbahnen verlangt einen Mechanismus, mit dem diese Vorgänge mit einfachen Mitteln und großer Sicherheit ausgeführt werden können. Insbesondere haben sich dabei Gliederketten bewährt, deren jedes Glied mit einem entsprechenden Spannstück versehen ist, das beim Überlaufen eines ersten Kettenrades jeweils geöffnet ist, so daß währenddessen der Rand eine Verpackungsfolienbahn erfaßt und gespannt wird, und das in gleicher Weise beim Überlaufen eines zweiten Kettenrades wieder geöffnet wird, wobei die (inzwischen verarbeitete) Verpackungsfolienbahn freigegeben wird.Especially when transporting packaging film webs that can be welded to one another, in which packaged goods are measured between a bottom and a top film and are then sealed into salable portions by welding them, it is necessary to tighten the packaging film webs tightly and to promote them at the same time, such as, for example is described in the published patent application DE 24 30 497. The constantly changing tensioning and releasing of the packaging film webs demands one Mechanism with which these operations can be carried out with simple means and with great security. Link chains have proven particularly useful, each link being provided with a corresponding tensioning piece, which is opened when a first sprocket overflows, so that the edge of a packaging film web is gripped and tensioned, and in the same way when a second sprocket overflows is opened, whereby the (now processed) packaging film web is released.
Die dabei verwendeten, beim Überlaufen der Kettenräder öffnenden und/oder schließenden Spannstücke benutzen in der Regel Spannelemente, die gegen die Kraft von Schraubendruckfedern mittels eines Druckbolzens bewegt werden, wenn ein Kettenrad überlaufen wird. Es versteht sich, daß die erforderlichen Spannkräfte für die Verpackungsfolienbahnen durchweg sehr groß gewählt werden müssen, um eine einwandfreie Einspannung zu gewährleisten, während der auch eine Verformung der Verpackungsfolienbahn möglich sein muß.The tensioning pieces used and opening and / or closing when the sprockets overrun generally use tensioning elements which are moved against the force of helical compression springs by means of a pressure bolt when a sprocket is overrun. It goes without saying that the tensioning forces required for the packaging film webs must be chosen to be very large throughout in order to ensure proper clamping, during which a deformation of the packaging film web must also be possible.
Insbesondere das bewegliche Federende der Schraubendruckfeder muß deshalb von einem hochfesten Anschlagstück abgefangen werden. Es ist bekannt, zu diesem Zweck in der Führspindel einen Sprengring vorzusehen, an dem dieses Federende anliegt. Sprengringe sind aber durchweg aus einem elastischen und nicht rostfreien Federstahl angefertigt; handelt es sich bei dem Packgut um Nahrungsmittel, ist die Verwendung eines solchen Sprengringes aus hygienischen Gründen nicht wünschenswert.In particular, the movable spring end of the helical compression spring must therefore be intercepted by a high-strength stop piece. For this purpose, it is known to provide a snap ring in the lead screw against which this spring end rests. Snap rings are made entirely of elastic and non-rusting spring steel; if the packaged goods are food, the use of such a snap ring is not desirable for hygienic reasons.
Darüberhinaus bietet ein Sprengring keine ausreichende Sicherheit dafür, daß er sich nicht von der Führspindel löst, beispielsweise, wenn er mangelhaft montiert und nicht mit der nötigen Spannkraft auf der Führspindel vorgesehen ist, was auch der Fall ist, wenn der Durchmesser am Grunde der Halterille außerhalb der für den Sprengring passenden erforderlichen Toleranz liegt. Gleichgültig, ob dieser Durchmesser zu klein oder zu groß geraten ist, kann sich dann während des Betriebes der Sprengring aus dem Bereich der Führspindel entfernen und die plötzliche Entspannung des Spannstückes heraufbeschwören, die dabei zu einem Schaden an der zugehörigen Fördereinrichtung führen kann. Eine Prüfung, ob der Sprengring ordnungsgemäß unter Vorspannung montiert ist, ist mit einfachen, für den Werkstattbetrieb geeigneten Mitteln nicht möglich oder zu teuer. Ein ordnungsgemäßer Zusammenbau ist deshalb in unerwünschter Weise von der Fertigkeit und Gewissenhaftigkeit des Montagepersonals abhängig.In addition, a snap ring does not offer sufficient Assurance that it does not come loose from the lead screw, for example, if it is installed incorrectly and is not provided with the necessary clamping force on the lead screw, which is also the case if the diameter at the base of the retaining groove is outside the required one for the snap ring Tolerance lies. Regardless of whether this diameter is too small or too large, the snap ring can then move away from the area of the lead screw during operation and conjure up the sudden relaxation of the clamping piece, which can damage the associated conveyor. Checking whether the snap ring is properly installed under pretension is not possible with simple means suitable for workshop operation or is too expensive. Proper assembly is therefore undesirably dependent on the skill and conscientiousness of the assembly personnel.
Die Erfindung hat sich deshalb die Aufgabe gestellt, ein ringförmiges Anschlagstück der eingangs näher bezeichneten Art so auszubilden, daß es ohne Bedenken verwendet werden kann, wenn es mit Nahrungsmitteln in Kontakt kommt, und das ferner nach seinem Zusammenbau mit der Führspindel einen sehr sicheren Anschlag für das bewegbare Federende der Schraubendruckfeder bildet, ohne daß an die Geschicklichkeit und Zuverlässigkeit des Montagepersonals besondere Anforderungen gestellt werden müßten; allein sein Einbau, beispielsweise in einem Spannstück, soll bereits die Gewähr dafür bieten, daß das Anschlagstück auch bei fortwährend hoher dynamischer und dabei ständig wechselnder Be- und Entlastung und beliebig langer Betriebsdauer das bewegliche Federende der Schraubendruckfeder sicher orientiert.The invention has therefore set itself the task of forming an annular stop piece of the type specified in the introduction so that it can be used without hesitation when it comes into contact with food, and furthermore, after its assembly with the lead screw, a very secure stop for the movable spring end of the helical compression spring forms, without having to make special demands on the skill and reliability of the assembly personnel; only its installation, for example in a clamping piece, should already provide the guarantee that the stop piece will reliably orient the movable spring end of the helical compression spring even with continuously high dynamic and thereby constantly changing loading and unloading and any length of operating time.
Trotzdem soll das Anschlagstück nach wie vor billig herstellbar sein und keinen zusätzlichen Raum- und Montageaufwand erfordern.Nevertheless, the stop piece should still be cheap to produce and require no additional space and assembly effort.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß das Anschlagstück aus einer flachen, kreisringförmigen Grundplatte und einem an dem äußeren Rand der Grundplatte in Richtung auf das Federende weisenden, ringzylindrischen, das Federende zumindest überwiegend umfassenden Kragen besteht und der innere, am Grund der Halterille anliegende Rand der Grundplatte durch einen Einführschlitz mit dem äußeren Rand verbunden ist, wobei die Breite des Einführschlitzes dem Durchmesser am Grunde der Halterille angepaßt und so bemessen ist, daß das Anschlagstück gerade noch klemmfrei auf den Grund der Halterille aufschiebbar ist. In bevorzugter Ausführung wird der Kragen durch eine Bördelung an dem äußeren Rand der Grundplatte gebildet.According to the invention the object is achieved in that the stop piece consists of a flat, circular base plate and a ring-cylindrical collar pointing at the outer edge of the base plate in the direction of the spring end and at least predominantly encompassing the spring end, and the inner edge bearing against the base of the retaining groove the base plate is connected to the outer edge by an insertion slot, the width of the insertion slot being adapted to the diameter at the base of the holding groove and being dimensioned such that the stop piece can just be pushed onto the base of the holding groove without jamming. In a preferred embodiment, the collar is formed by a flange on the outer edge of the base plate.
Ein derart kompakt ausgebildetes Anschlagstück kann in einfacher Weise als Stanz- und Biegeteil und sehr kostengünstig hergestellt werden. Es wird durch die Schraubendruckfeder selbst, nach seiner Montage, an Ort und Stelle gehalten: Das Anschlagstück wird nur axial von der Federkraft belastet; an ihm eventuell auftretende seitliche Kräfte vermögen nicht, das Anschlagstück aus seiner mittigen Lage herauszuschieben, weil es über den Kragen und das Federende sicher zentriert ist. Aus diesem Grund ist auch eine vollständige Montage mit hoher Sicherheit gewährleistet: das Federende kann erst (deutlich sichtbar!) innerhalb des Kragens auf die Grundplatte abgesenkt werden, wenn das Anschlagstück mit seinem Einführschlitz soweit in die Halterille eingeschoben ist, daß der innere Rand der Grundplatte dem Grunde der Halterille unmittelbar benachbart ist. Bei unvollständiger Montage befindet sich das Federende nicht innerhalb des Kragens, sondern liegt, gut sichtbar, auf diesem auf, als Hinweis darauf, daß der Zusammenbau nicht ordnungsgemäß erfolgt ist.Such a compact stop piece can be produced in a simple manner as a stamped and bent part and very inexpensively. It is held in place by the helical compression spring itself after it has been installed: the stop piece is only axially loaded by the spring force; lateral forces that may occur on it are unable to push the stop piece out of its central position because it is securely centered over the collar and the spring end. For this reason, complete assembly is also guaranteed with a high level of security: the spring end can only be (clearly visible!) Lowered into the collar on the base plate when the stopper with its insertion slot is inserted so far into the retaining groove that the inner edge of the Base plate is the base of the retaining groove immediately adjacent. If the assembly is incomplete, the spring end is not inside the collar, but lies on it, clearly visible, as an indication that the assembly has not been carried out properly.
Es ist zweckmäßig, wenn der Kragen parallel und symmetrisch zu dem Einführschlitz durch eine Ausnehmung unterbrochen ist, daß deren Breite dem Durchmesser der Führspindel mindestens gleich und vorzugsweise geringfügig größer als dieser ist. Auf diese Weise kann das Anschlagstück unabhängig von der Breite der Halterille montiert werden und diese kann insbesondere auch die Gesamthöhe des Anschlagstückes unterschreiten und nur wenig größer als die Dicke der Grundplatte ausgebildet sein.It is useful if the collar is interrupted parallel and symmetrically to the insertion slot by a recess that the width of the diameter of the lead screw is at least equal and preferably slightly larger than this. In this way, the stop piece can be mounted regardless of the width of the holding groove and this can in particular also fall below the total height of the stop piece and be made only slightly larger than the thickness of the base plate.
Eine hygienische Ausbildung des Anschlagstückes ist gewährleistet, wenn es aus einem nichtrostenden, ernährungsphysiologisch indifferenten, Werkstoff, vorzugsweise Stahl, besteht.A hygienic design of the stop piece is ensured if it consists of a rustproof, nutritionally indifferent material, preferably steel.
Ganz besonders vorteilhaft ist es, wenn der von Abmessung und Werkstoff bestimmter Verformungswiderstand des Anschlagstückes so gewählt ist, daß eine elastische oder bleibende Verformung unter dem langwährenden Einfluß der Schraubendruckfeder entfällt. Auf diese Weise ist eine auf lange Sicht unveränderte Vorspannkraft der Schraubendruckfeder abgesichert; die Vorspannkraft kann sehr hoch gewählt werden, so daß eine entsprechend hohe Spannkraft erzeugt werden kann, wenn das Anschlagstück beispielsweise an einem von der Schraubendruckfeder belasteten, gegen deren Federkraft lösbaren Spannstück verwendet wird.It is particularly advantageous if the deformation resistance of the stop piece, which is determined by the dimension and material, is selected such that an elastic or permanent deformation is eliminated under the long-term influence of the helical compression spring. In this way, a pretensioning force of the helical compression spring that is unchanged in the long term is ensured; the prestressing force can be selected to be very high, so that a correspondingly high prestressing force can be generated if the stop piece is used, for example, on a tensioning piece which is loaded by the helical compression spring and can be released against its spring force.
Ein solches Spannstück, insbesondere zur Verwendung an einer Förderkette zum Spannen und anschließenden Transport einer Verpackungsfolienbahn in einer Verpackungsmaschine, ist vorteilhaft an einem Kettenglied einer als Gliederkette ausgebildeten Förderkette vorgesehen.Such a tensioning piece, in particular for use on a conveyor chain for tensioning and subsequently transporting a packaging film web in a packaging machine, is advantageously provided on a chain link of a conveyor chain designed as a link chain.
Die Anordnung kann zweckmäßig so getroffen sein, daß die Führspindel quer zur Förderrichtung an einem Lagerbock axial beweglich gelagert ist, der U-förmig aus einer an dem Kettenglied befestigten Haltelasche und zwei Lagerlaschen besteht, wobei die Schraubendruckfeder außer an dem Anschlagstück noch an einer Lagerlasche anschlägt, an der außen ein mit der Führspindel einstückiges Klemmstück für die Verpackungsfolie unter der Wirkung der Schraubendruckfeder anliegt und gegen die Wirkung der Schraubendruckfeder abhebbar ist, wenn die Führspindel an einem axial fluchtenden, durch die andere Lagerlasche geführten und zu dieser überständigen Druckbolzen belastet wird, beispielsweise von einem Ringsattel eines Kettenrades für die Gliederkette. Eine solche Anordnung verwendet das erfindungsgemäße Anschlagstück sehr vorteilhaft und ist dabei selbst einfach aufgebaut, so daß Spannstücke dieser Art in großer Stückzahl billig hergestellt und an den Kettengliedern der Gliederkette angebracht werden können. Die Anforderungen an das Anschlagstück der formstabil-starren Ausbildung und der Verwendung eines nichtrostenden Stahles sind mit ganz geringem Aufwand realisiert, so daß das Spannstück insgesamt ohne Bedenken auch beim Verpacken von Nahrungsmitteln eingesetzt werden kann.The arrangement can expediently be such that the lead screw is axially movably mounted transversely to the conveying direction on a bearing block, which consists of a U-shaped holding bracket attached to the chain link and two bearing brackets, the helical compression spring also striking a bearing bracket apart from the stop piece , on the outside of which a clamping piece for the packaging film, which is integral with the lead screw, rests under the action of the helical compression spring and can be lifted off against the action of the helical compression spring if the lead screw is loaded on an axially aligned thrust pin which is guided through the other bearing bracket and overhanging it, for example from a ring saddle of a chain wheel for the link chain. Such an arrangement uses the stop piece according to the invention very advantageously and is itself of simple construction, so that tension pieces of this type can be cheaply produced in large numbers and attached to the chain links of the link chain. The requirements for the stop piece of the rigid design and the use of a stainless steel are met with very little effort, so that the clamping piece can be used as a whole even when packaging food.
Für die Montage des Anschlagstückes ist es günstig, wenn die Breite der Kalterille an der Führspindel mindestens der Dicke der Grundplatte gleich, vorzugsweise aber zumindest geringfügig größer als diese ist, und wenn gegebenenfalls die Halterille an der Führspindel so vorgesehen ist, daß bei an der ersten Lagerlasche anliegendem Klemmstück das Anschlagstück von der zweiten Lagerlasche zumindest geringfügig beabstandet ist.For the assembly of the stop piece, it is advantageous if the width of the cold groove on the lead screw is at least equal to the thickness of the base plate, preferably but is at least slightly larger than this, and if the retaining groove on the lead screw is optionally provided such that the stop piece is at least slightly spaced from the second bearing plate when the clamping piece is in contact with the first bearing plate.
Die Erfindung ist stets mit Vorteil anwendbar, wenn an Spannstücken der beschriebenen Art sehr hohe Vorspannkräfte der Schraubendruckfeder beherrscht werden müssen; sie ist jedoch keineswegs darauf beschränkt. Das erfindungsgemäße Anschlagstück ist generell als Arretierung eines Federendes einer solchen Schraubendruckfeder an einer Führspindel oder dergleichen geeignet.The invention can always be used with advantage if very high pretensioning forces of the helical compression spring have to be mastered on clamping pieces of the type described; however, it is by no means limited to this. The stop piece according to the invention is generally suitable for locking a spring end of such a helical compression spring on a lead screw or the like.
Die Erfindung wird nachstehend an Hand der Zeichnung an einem Ausführungsbeispiel näher erläutert. Es zeigen
- Fig.1
- eine Gliederkette für den Transport einer Verpackungsfolienbahn oder dergleichen im Bereich eines Kettenrades in der Vorderansicht,
- Fig.2
- eine Seitenansicht zu Fig.1 im Schnitt A - A,
- Fig.3
- ein Kettenglied aus Fig.2, etwas vergrößert und bei entspanntem Spannstück,
- Fig.4
- einen Schnitt B - B aus Fig. 3 und
- Fig.5
- ein erfindungsgemäßes Anschlagstück in drei Ansichten der Teilfig. 5a bis 5c,, gegenüber den Fig.3 und 4 wiederum vergrößert,
- Fig. 1
- a link chain for the transport of a packaging film web or the like in the area of a chain wheel in the front view,
- Fig. 2
- a side view of Figure 1 in section A - A,
- Fig. 3
- a chain link from Fig. 2, somewhat enlarged and with the tensioning element relaxed,
- Fig. 4
- a section BB from Fig. 3 and
- Fig. 5
- an inventive stopper in three views of Teilfig. 5a to 5c, again enlarged compared to FIGS. 3 and 4,
In den Fig.1 und 2 ist eine für den Antrieb einer Verpackungsfolienbahn geeignete Gliederkette GK im Bereich eines auf einer ortsfesten Welle W gelagerten Kettenrades KR zu erkennen, die aus Kettengliedern KG zusammengesetzt ist. An jedem Kettenglied KG ist ein Spannstück S befestigt, wie es im einzelnen in den Fig.3 und 4 erläutert ist.1 and 2 show a link chain GK suitable for driving a packaging film web in the region of a chain wheel mounted on a stationary shaft W. To recognize KR, which is composed of chain links KG. A tensioning piece S is fastened to each chain link KG, as is explained in detail in FIGS. 3 and 4.
Das Spannstück S besteht dementsprechend aus einem an dem zugehörigen Kettenglied KG befestigbaren, beispielsweise angenieteten Lagerbock 1, einer Führspindel 2, einer Schraubendruckfeder 3 und einem an der Führspindel 2 befestigten Anschlagstück 4.Accordingly, the tensioning piece S consists of a
Der in der Vorderansicht der Fig.3 U-förmige, aus einem Blech abgefaltete Lagerbock 1 ist einstückig aus einer an dem Kettenglied KG anliegenden Haltelasche 11 und zwei aus der Haltelasche 11 im Abstand a abgebogenen, parallelen Lagerlaschen 12a,12b zusammengesetzt, die zur Lagerung der axial begrenzt beweglichen Führspindel 2 dienen.The U-shaped
An der Führspindel 2 ist einerseits ein Druckbolzen 21 und andererseits pilzförmig ein Klemmstück 22 angeformt. Während das Klemmstück 22 unter der Last der die Führspindel 2 überfangenden Schraubendruckfeder 3 an einer ersten Lagerlasche 12a anliegt, wenn sich das zugehörige Kettenglied KG außerhalb des Bereiches des Kettenrades KR befindet, kann es von der Lagerlasche 12a abgehoben sein, wenn das Kettenglied KG in diesen Bereich gezogen wird. Wie in Fig.1 unschwer zu erkennen ist, gerät dabei der Druckbolzen 21 in den Wirkbereich eine an dem Kettenrad KR einstückig ausgebildeten Ringsattels RS und wird in diesem Wirkbereich gegen die Federkraft der Schraubendruckfeder 3 angehoben: beispielsweise kann nun eine zu spannende Verpackungsfolienbahn zwischen dem Klemmstück 22 und der Lagerlasche 12a eingebracht und, wenn das Kettenglied KG den Bereich des Kettenrades KR wieder verlassen hat, gespannt werden; ähnlich läuft an einem weiteren Kettenrad die Herauslösung der Verpackungsfolienbahn aus den Spannstücken S ab.On the
An der Führspindel 2 ist - dem Druckbolzen 21 benachbart und in der Nähe der Lagerlasche 12b - eine Halterille 23 eingetieft, in der das Anschlagstück 4 axial arretiert eingeschoben ist. Die Schraubendruckfeder 3 ist dabei zwischen der Lagerlasche 12a und dem Anschlagstück 4 mit hoher Vorspannung eingespannt. Die Halterille 23 ist durch den Durchmesser g ihres Grundes 23a und ihre Tiefe t bestimmt.On the lead screw 2 - adjacent to the
Im Schnitt der Fig.4 ist zu sehen, wie das Anschlagstück 4 in die Halterille 23 eingeschoben ist. Das Anschlagstück 4 ist einstückig aus einer kreisringförmigen Grundplatte 41 und einem Kragen 42 zusammengesetzt. Der aus der Grundplatte 41 abgefaltete, ringzylindrische Kragen 42 der Höhe h umfängt das bewegliche Federende 31 der Schraubendruckfeder 3, deren anderes Federende 32 an der Lagerlasche 12a anliegt.4 shows how the stop piece 4 is inserted into the holding
Die Einzelheiten des Anschlagstückes 4 sind in der Fig.5 dargestellt. Ein (innerer) Rand 43a einer mittigen, dem Durchmesser g des Grundes 23a der Halterille 23 angepaßten Durchbrechung 43 ist durch einen Einführschlitz 44 mit dem (äußeren) Rand 41a der Grundplatte 41 verbunden und im übrigen halbkreisförmig ausgebildet, wobei die Breite b des Einführschlitzes 44 so bemessen ist, daß das Anschlagstück 4 bequem, aber ohne viel Spiel in die Halterille 23 eingeschoben werden kann. Die Montage der Anschlagstückes 4 wird erleichtert, wenn der Kragen 42 symmetrisch zum Einführschlitz 44, beidseits zu diesem zurückgesetzt, endet. Die so gebildete Ausnehmung 42a des Kragens 42 hat hier eine Breite k, die etwas größer ist als der Durchmesser f der Führspindel 2, so daß ein Verklemmen bei der Montage vermieden wird.The details of the stop piece 4 are shown in Fig.5. An (inner)
Trotz der Durchbrechung 43 und dem Einführschlitz 44 ist das Anschlagstück 4 wegen des angebördelten Kragens 42 außerordentlich formstabil. Es wird in montiertem Zustand wegen des an der Grundplatte 41 anliegenden und von dem Kragen 42 eingefaßten Federendes 31 sicher in situ gehalten.Despite the
- 11
- LagerbockBearing block
- 1111
- HaltelascheRetaining tab
- 12a,12b12a, 12b
- LagerlaschenBearing plates
- 22nd
- FührspindelLead screw
- 2121
- DruckbolzenPressure bolt
- 2222
- KlemmstückClamp
- 2323
- HalterilleRetaining groove
- 23a23a
- Grundreason
- 33rd
- SchraubendruckfederHelical compression spring
- 31,3231.32
- FederendeSpring end
- 44th
- AnschlagstückStop piece
- 4141
- GrundplatteBase plate
- 41a41a
- (äußerer) Rand(outer) margin
- 4242
- Kragencollar
- 42a42a
- AusnehmungRecess
- 4343
- DurchbrechungBreakthrough
- 43a43a
- (innerer) Rand(inner) margin
- 4444
- EinführschlitzInsertion slot
- GKGK
- GliederketteLink chain
- KGKG
- KettengliedChain link
- KRKR
- KettenradSprocket
- RSRS
- RingsattelRing saddle
- SS
- SpannstückClamping piece
- WW
- Wellewave
- aa
- Abstand (der Lagerlaschen 12)Distance (of the bearing plates 12)
- bb
- Breite (des Einführschlitzes 44)Width (of insertion slot 44)
- dd
- Dicke (der Grundplatte 41)Thickness (of base plate 41)
- ff
- Durchmesser (der Führspindel 2)Diameter (of lead screw 2)
- gG
- Durchmesser (des Grundes 23a)Diameter (of the bottom 23a)
- hH
- Höhe (des Kragens 42)Height (of collar 42)
- kk
- Breite (der Kragenausnehmung)Width (of the collar recess)
- rr
- Breite (der Halterille 23)Width (the holding groove 23)
- tt
- Tiefe (der Halterille 23)Depth (the holding groove 23)
Claims (9)
dadurch gekennzeichnet, daß
characterized in that
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19525523A DE19525523A1 (en) | 1995-07-13 | 1995-07-13 | Stop piece |
DE19525523 | 1995-07-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0753460A1 true EP0753460A1 (en) | 1997-01-15 |
EP0753460B1 EP0753460B1 (en) | 1999-02-03 |
Family
ID=7766726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96106417A Expired - Lifetime EP0753460B1 (en) | 1995-07-13 | 1996-04-24 | Clamping device |
Country Status (6)
Country | Link |
---|---|
US (1) | US5702044A (en) |
EP (1) | EP0753460B1 (en) |
AT (1) | ATE176433T1 (en) |
DE (2) | DE19525523A1 (en) |
DK (1) | DK0753460T3 (en) |
ES (1) | ES2128805T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007137631A1 (en) * | 2006-05-30 | 2007-12-06 | Iwis Motorsysteme Gmbh & Co. Kg | Conveyor chain with a pivotable gripper head |
WO2007137630A1 (en) * | 2006-05-30 | 2007-12-06 | Iwis Motorsysteme Gmbh & Co. Kg | Conveyor chain with a gripper tapper guide |
WO2007137629A1 (en) * | 2006-05-30 | 2007-12-06 | Iwis Motorsysteme Gmbh & Co. Kg | Conveyor chain comprising an openable gripper head |
EP3278954A1 (en) * | 2016-08-04 | 2018-02-07 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Deep draw packaging machine with holding strip |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10251740A1 (en) | 2002-11-05 | 2004-05-13 | Convenience Food Systems Wallau Gmbh & Co. Kg | Clamping piece for conveyor chain for film packing sheet has support bracket with first and second surface, and clamping element movably mounted in support bracket and with clamping component interacting with first surface |
ATE344892T1 (en) * | 2004-04-05 | 2006-11-15 | Schmezer Alexander | COMPRESSION-RIGID DRIVE CHAIN FOR AN ACTUATING DEVICE |
DE102006036617A1 (en) * | 2006-08-04 | 2008-02-14 | JOH. WINKLHOFER & SÖHNE GMBH & Co. KG | Transport chain used as a film chain conveyor comprises a clamping device consisting of a clamping support and a clamping element that is designed as a separate revolving element engaging with the transport chain over a pre-determined path |
EP2740677A1 (en) * | 2012-12-10 | 2014-06-11 | Multivac Sepp Haggenmüller GmbH & Co. KG | Transport device for deep draw packaging machine |
WO2016094405A1 (en) * | 2014-12-08 | 2016-06-16 | EVO Development, LLC | Thermoforming trim removal systems and methods |
EP3456642B1 (en) * | 2017-09-15 | 2023-11-01 | Tetra Laval Holdings & Finance S.A. | A tensioning device for a chain driven jaw system |
US11691771B1 (en) * | 2022-03-02 | 2023-07-04 | Moshe Epstein | Hygienic conveying chain clamp used in a horizontal form fill and seal packaging machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2355921A1 (en) * | 1973-11-08 | 1975-05-15 | Waldner Kg H | Strip material transport mechanism - has disc actuating grips on parallel chains eccentrically mounted in relation to sprocket |
FR2484381A1 (en) * | 1980-06-12 | 1981-12-18 | Multivac Haggenmueller Kg | TRANSPORT CHAIN |
DE3315419A1 (en) * | 1983-04-28 | 1984-10-31 | Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden | TRANSPORTATION DEVICE FOR GUIDING A MATERIAL RAIL IN A PACKING MACHINE |
Family Cites Families (8)
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US969295A (en) * | 1909-09-23 | 1910-09-06 | Philip Jacob Meahl | Paper-feed mechanism. |
US1460538A (en) * | 1921-08-20 | 1923-07-03 | Lucian F Easton | Locking device for motor valves |
US2237877A (en) * | 1939-05-05 | 1941-04-08 | James B Fulk | Method and apparatus for feeding paper |
US3536184A (en) * | 1965-12-27 | 1970-10-27 | Morrell & Co John | Vacuum packaging apparatus |
DE2430497B2 (en) * | 1974-06-25 | 1981-05-21 | Krämer & Grebe GmbH & Co KG Maschinen- und Modellfabrik, 3560 Biedenkopf | Device for packing goods |
US4113397A (en) * | 1975-10-17 | 1978-09-12 | Snyder Francis H | Pinless resilient coupling |
US4826065A (en) * | 1983-04-28 | 1989-05-02 | Multivac Sepp Haggenmuller Kg | Feeding means for feeding a machine web in a packaging machine |
US5364201A (en) * | 1993-02-08 | 1994-11-15 | Norco, Inc. | Hinged strut construction |
-
1995
- 1995-07-13 DE DE19525523A patent/DE19525523A1/en not_active Ceased
-
1996
- 1996-04-24 DK DK96106417T patent/DK0753460T3/en active
- 1996-04-24 EP EP96106417A patent/EP0753460B1/en not_active Expired - Lifetime
- 1996-04-24 AT AT96106417T patent/ATE176433T1/en not_active IP Right Cessation
- 1996-04-24 ES ES96106417T patent/ES2128805T3/en not_active Expired - Lifetime
- 1996-04-24 DE DE59601250T patent/DE59601250D1/en not_active Expired - Lifetime
- 1996-07-12 US US08/679,535 patent/US5702044A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2355921A1 (en) * | 1973-11-08 | 1975-05-15 | Waldner Kg H | Strip material transport mechanism - has disc actuating grips on parallel chains eccentrically mounted in relation to sprocket |
FR2484381A1 (en) * | 1980-06-12 | 1981-12-18 | Multivac Haggenmueller Kg | TRANSPORT CHAIN |
DE3315419A1 (en) * | 1983-04-28 | 1984-10-31 | Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden | TRANSPORTATION DEVICE FOR GUIDING A MATERIAL RAIL IN A PACKING MACHINE |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007137631A1 (en) * | 2006-05-30 | 2007-12-06 | Iwis Motorsysteme Gmbh & Co. Kg | Conveyor chain with a pivotable gripper head |
WO2007137630A1 (en) * | 2006-05-30 | 2007-12-06 | Iwis Motorsysteme Gmbh & Co. Kg | Conveyor chain with a gripper tapper guide |
WO2007137629A1 (en) * | 2006-05-30 | 2007-12-06 | Iwis Motorsysteme Gmbh & Co. Kg | Conveyor chain comprising an openable gripper head |
EP3278954A1 (en) * | 2016-08-04 | 2018-02-07 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Deep draw packaging machine with holding strip |
Also Published As
Publication number | Publication date |
---|---|
DE19525523A1 (en) | 1997-01-16 |
DE59601250D1 (en) | 1999-03-18 |
DK0753460T3 (en) | 1999-09-20 |
ES2128805T3 (en) | 1999-05-16 |
ATE176433T1 (en) | 1999-02-15 |
EP0753460B1 (en) | 1999-02-03 |
US5702044A (en) | 1997-12-30 |
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