EP0753460B1 - Clamping device - Google Patents
Clamping device Download PDFInfo
- Publication number
- EP0753460B1 EP0753460B1 EP96106417A EP96106417A EP0753460B1 EP 0753460 B1 EP0753460 B1 EP 0753460B1 EP 96106417 A EP96106417 A EP 96106417A EP 96106417 A EP96106417 A EP 96106417A EP 0753460 B1 EP0753460 B1 EP 0753460B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- helical compression
- compression spring
- guide spindle
- gripping member
- 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.)
- Expired - Lifetime
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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 a clamping piece, in particular for Packaging machines, with a storage tab, one in the Bearing bracket mounted guide spindle with one on this attached clamping piece, one overlapping the guide spindle Helical compression spring and a stop piece for the Helical compression spring, the stop piece in a radial, concentric retaining groove of the guide spindle, axially oriented, is provided.
- a clamping piece is known from FR-A-2 484 381.
- Link chains in particular have proven their worth equip each link with a corresponding clamping piece is that when a first sprocket overflows is open, so that the edge of a packaging film is grasped and excited, and that in the same Way again when overrunning a second sprocket is opened, whereby the (now processed) packaging film web is released.
- a snap ring does not offer sufficient security for not detaching from the lead screw, for example, if it is installed improperly and not with the necessary clamping force is provided on the lead screw, which is also the case if the diameter at the bottom of the Retaining groove outside of the one required for the snap ring Tolerance lies. No matter whether this diameter is too small or too large during operation of the snap ring from the area of Remove the lead screw and the sudden relaxation of the Summon the tensioning piece, causing damage can lead to the associated conveyor. An exam whether the snap ring is properly under tension is assembled with simple, for workshop operation suitable means not possible or too expensive. A proper one Assembly is therefore undesirable on the skill and conscientiousness of the assembly staff dependent.
- the invention has therefore set itself the task ring-shaped stop piece of the initially specified Art so that it can be used without hesitation can when it comes in contact with food and that also after its assembly with the lead screw very secure stop for the movable spring end of the Helical compression spring forms without losing skill and reliability of the assembly staff special requirements should be asked; its installation alone, for example, in a clamping piece, is already the guarantee offer that the stop piece even with continuous high dynamic and constantly changing loading and Relief and any length of time the mobile Spring end of the helical compression spring safely oriented. Nevertheless the stop piece should still be cheap to produce be and do not require additional space and assembly effort.
- the object is achieved in that the Stop piece made of a flat, circular base plate and one at the outer edge of the base plate in Direction towards the spring end, ring-cylindrical, the spring end is at least predominantly comprehensive collar and the inner one, which lies against the bottom of the holding groove Edge of the base plate through an insertion slot with the outer Edge is connected, the width of the insertion slot adapted to the diameter at the bottom of the retaining groove and is dimensioned so that the stop piece just barely can be pushed onto the bottom of the retaining groove without jamming.
- the collar is parallel and symmetrical to the insertion slot interrupted by a recess whose Width at least equal to the diameter of the lead screw and is preferably slightly larger than this.
- the collar is executed by a flare formed on the outer edge of the base plate.
- Such a compact stop can be easier Way as a stamped and bent part and very inexpensive getting produced. It is made by the helical compression spring itself, after its assembly, held in place: The stop piece is only axially by the spring force burdened; lateral forces that may occur on it not able to stop the stop piece from its central position push it out because it's over the collar and the spring end is centered safely. For this reason it is also a complete one Assured with high security: the The spring end can only (clearly visible!) Inside the collar be lowered onto the base plate when the stop piece with its insertion slot so far into the holding groove is inserted that the inner edge of the Base plate immediately adjacent to the bottom of the retaining groove is. If the assembly is incomplete the spring end not within the collar, but lies, clearly visible, on this, as an indication that the assembly is not done properly is.
- the collar is parallel and symmetrical interrupted to the insertion slot by a recess is that their width is the diameter of the Lead screw at least the same and preferably slightly is larger than this. That way it can Stop piece regardless of the width of the holding groove can be mounted and this can in particular also Fall below the total height of the stop piece and only little larger than the thickness of the base plate be.
- Hygienic training of the stop piece is guaranteed if it's from a stainless, nutritionally indifferent, material, preferably Steel.
- the dimension and material certain deformation resistance of the Stop piece is chosen so that an elastic or permanent deformation under the long-lasting influence the helical compression spring is omitted.
- the preload can be chosen very high, so that a correspondingly high Tension can be generated when the stop piece for example on a spring loaded by the helical compression spring, against their spring force releasable clamping piece is used.
- Such a clamping piece in particular for use a conveyor chain for tensioning and subsequent transport a packaging film web in a packaging machine, is advantageous on a chain link provided as a link chain conveyor chain.
- the arrangement can be made such that the lead screw transversely to the conveying direction on a bearing block is axially movable, the U-shaped from a on the chain link attached bracket and two Bearing tabs exist, the helical compression spring except strikes a bearing bracket on the stop piece, on the outside one with the lead screw one-piece clamping piece for the packaging film under the effect of the helical compression spring is present and against the effect of the helical compression spring can be lifted if the lead screw on an axially aligned, through the led other storage tab and overhang to this Push pin is loaded, for example by a Ring saddle of a chain wheel for the link chain.
- a such an arrangement uses the stop piece according to the invention very beneficial and is simple itself built up so that clamping pieces of this type in large Quantity produced cheaply and on the chain links the link chain can be attached.
- the requirements to the stop of the dimensionally stable, rigid training and the use of a stainless steel are realized with very little effort, so that Overall clamping piece without hesitation even when packing of food can be used.
- 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 necessary, the retaining groove on the lead screw is provided so that at the first bracket adjacent clamping piece the stop piece from the second Bearing bracket is at least slightly spaced.
- the invention is always applicable to advantage when on Clamping pieces of the type described very high prestressing forces the helical compression spring must be mastered; however, it is by no means limited to this.
- the stop piece according to the invention is generally as a lock a spring end of such a helical compression spring on a lead screw or the like.
- 1 and 2 is one for driving a packaging film web suitable link chain GK in the area a sprocket mounted on a fixed shaft W.
- KR which is composed of chain links KG is.
- the clamping piece S consists of one the associated chain link KG attachable, for example riveted bracket 1, a lead screw 2, a helical compression spring 3 and one on the lead screw 2 attached stop piece 4.
- the U-shaped in the front view of FIG. 3, from a Sheet metal folded bracket 1 is made in one piece from one on the chain link KG adjacent bracket 11 and two bent from the retaining tab 11 at a distance a parallel bearing plates 12a, 12b assembled, the for storing the axially limited movable lead screw 2 serve.
- a pressure pin 21 on the lead screw 2 there is a pressure pin 21 on the lead screw 2 and on the other hand, a clamping piece 22 is formed in a mushroom shape. While the clamp 22 under the load of the Leading screw 2 overlapping helical compression spring 3 a first bearing bracket 12a is present when the associated one Chain link KG outside the area of Sprocket KR is located, it can be removed from the bracket 12a be lifted off 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 range one integrally formed on the sprocket KR Ringsattels RS and is in this effective range against the Spring force of the helical compression spring 3 increased: for example can now be an exciting packaging film web between the clamping piece 22 and the bearing bracket 12a introduced and when the chain link KG the area the sprocket KR has left again, excited become; similar runs on another sprocket Removing the packaging film web from the clamping pieces S from.
- the pressure pin 21 is adjacent and near the bearing bracket 12b - a retaining groove 23 recessed, in which the stop piece 4 axially locked in place.
- the helical compression spring 3 is between the bearing bracket 12a and the stop piece 4 clamped with high preload.
- the Holding groove 23 is by the diameter g of its bottom 23a and their depth t are determined.
- the section of Figure 4 shows how the stop piece 4 is inserted into the holding groove 23.
- the stop piece 4 is in one piece from an annular Base plate 41 and a collar 42 assembled.
- the ring-cylindrical folded out of the base plate 41 Collar 42 of height h surrounds the movable end of the spring 31 of the helical compression spring 3, the other end of the spring 32 rests on the bearing bracket 12a.
- the details of the stop piece 4 are in the Fig.5 shown.
- An (inner) edge 43a of a central, the diameter g of the bottom 23a of the holding groove 23 adapted opening 43 is through an insertion slot 44 with the (outer) edge 41a of the base plate 41 connected and otherwise semicircular, the width b of the insertion slot 44 is so dimensioned is that the stopper 4 convenient, but without a lot of play can be inserted into the holding groove 23 can.
- the assembly of the stop piece 4 is facilitated if the collar 42 is symmetrical to the insertion slot 44, set back on both sides, ends.
- the so formed recess 42a of the collar 42 has one here Width k, which is slightly larger than the diameter f the lead screw 2, so that jamming during assembly is avoided.
- the stop piece 4 because of the flanged collar 42 extremely dimensionally stable. It is assembled in Condition because of the on the base plate 41 and of the collar 42 bordered spring end 31 securely in held in situ.
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 Spannstück, insbesondere für Verpackungsmaschinen, mit einer Lagerlasche, einer in der Lagerlasche gelagerten Führungsspindel mit einem an dieser befestigten Klemmstück, einer die Führungsspindel überfangenden Schraubendruckfeder und einem Anschlagstück für die Schraubendruckfeder, wobei das Anschlagstück in einer radialen, konzentrischen Halterille der Führungsspindel, axial orientiert, vorgesehen ist. Ein derartiges Spannstück ist aus der FR-A-2 484 381 bekannt.The invention relates to a clamping piece, in particular for Packaging machines, with a storage tab, one in the Bearing bracket mounted guide spindle with one on this attached clamping piece, one overlapping the guide spindle Helical compression spring and a stop piece for the Helical compression spring, the stop piece in a radial, concentric retaining groove of the guide spindle, axially oriented, is provided. Such a clamping piece is known from FR-A-2 484 381.
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 daß in gleicher Weise beim Überlaufen eines zweiten Kettenrades wieder geöffnet wird, wobei die (inzwischen verarbeitete) Verpackungsfolienbahn freigegeben wird.Especially when transporting weldable ones Packaging film webs in which packaged goods between a bottom and a top film measured and made into salable portions by welding them together , it is necessary to use the packaging film webs to tighten tight and at the same time close them promote, such as in the published patent application DE 24 30 497 is described. The constantly changing Tensioning and releasing the packaging film webs required a mechanism that makes these operations easy Means and great security can be carried out. Link chains in particular have proven their worth equip each link with a corresponding clamping piece is that when a first sprocket overflows is open, so that the edge of a packaging film is grasped and excited, and that in the same Way again when overrunning a second sprocket 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 ones used, which open when the sprockets overflow and / or use closing clamps in the Rule elements that act against the force of helical compression springs be moved by means of a pressure pin if a sprocket will overrun. It is understood that the required clamping forces for the packaging film webs consistently have to be chosen very large in order to be flawless To ensure clamping, during which also a Deformation of the packaging film must be possible.
Insbesondere das bewegliche Federende der Schraubendruckfeder muß deshalb von einem hochfesten Anschlagstück abgefangen werden. Es ist bekannt (FR-A-2 484 381), 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 become. It is known (FR-A-2 484 381) to this Purpose to provide a snap ring in the lead screw against which this spring end rests. Snap rings are consistently made of elastic and non-rusting spring steel prepared; the packaged goods are food, is the use of such a snap ring hygienic reasons not desirable.
Darüber hinaus 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 security for not detaching from the lead screw, for example, if it is installed improperly and not with the necessary clamping force is provided on the lead screw, which is also the case if the diameter at the bottom of the Retaining groove outside of the one required for the snap ring Tolerance lies. No matter whether this diameter is too small or too large during operation of the snap ring from the area of Remove the lead screw and the sudden relaxation of the Summon the tensioning piece, causing damage can lead to the associated conveyor. An exam whether the snap ring is properly under tension is assembled with simple, for workshop operation suitable means not possible or too expensive. A proper one Assembly is therefore undesirable on the skill and conscientiousness of the assembly staff dependent.
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 daß 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. Trotzdem soll das Anschlagstück nach wie vor billig herstellbar sein und keinen zusätzlichen Raum- und Montageaufwand erfordern.The invention has therefore set itself the task ring-shaped stop piece of the initially specified Art so that it can be used without hesitation can when it comes in contact with food and that also after its assembly with the lead screw very secure stop for the movable spring end of the Helical compression spring forms without losing skill and reliability of the assembly staff special requirements should be asked; its installation alone, for example, in a clamping piece, is already the guarantee offer that the stop piece even with continuous high dynamic and constantly changing loading and Relief and any length of time the mobile Spring end of the helical compression spring safely oriented. Nevertheless the stop piece should still be cheap to produce be and do not require additional space and assembly effort.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß das Anschlagstück aus einer flachen, kreisringförmigen Grundplatte und einem am 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. Zudem ist der Kragen parallel und symmetrisch zu dem Einführschlitz durch eine Ausnehmung unterbrochen, deren Breite dem Durchmesser der Führspindel mindestens gleich und vorzugsweise geringfügig größer als dieser 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 made of a flat, circular base plate and one at the outer edge of the base plate in Direction towards the spring end, ring-cylindrical, the spring end is at least predominantly comprehensive collar and the inner one, which lies against the bottom of the holding groove Edge of the base plate through an insertion slot with the outer Edge is connected, the width of the insertion slot adapted to the diameter at the bottom of the retaining groove and is dimensioned so that the stop piece just barely can be pushed onto the bottom of the retaining groove without jamming. In addition, the collar is parallel and symmetrical to the insertion slot interrupted by a recess whose Width at least equal to the diameter of the lead screw and is preferably slightly larger than this. In preferred The collar is executed by a flare formed 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 can be easier Way as a stamped and bent part and very inexpensive getting produced. It is made by the helical compression spring itself, after its assembly, held in place: The stop piece is only axially by the spring force burdened; lateral forces that may occur on it not able to stop the stop piece from its central position push it out because it's over the collar and the spring end is centered safely. For this reason it is also a complete one Assured with high security: the The spring end can only (clearly visible!) Inside the collar be lowered onto the base plate when the stop piece with its insertion slot so far into the holding groove is inserted that the inner edge of the Base plate immediately adjacent to the bottom of the retaining groove is. If the assembly is incomplete the spring end not within the collar, but lies, clearly visible, on this, as an indication that the assembly is not done properly is.
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 parallel and symmetrical interrupted to the insertion slot by a recess is that their width is the diameter of the Lead screw at least the same and preferably slightly is larger than this. That way it can Stop piece regardless of the width of the holding groove can be mounted and this can in particular also Fall below the total height of the stop piece and only little larger than the thickness of the base plate be.
Eine hygienische Ausbildung des Anschlagstückes ist gewährleistet, wenn es aus einem nichtrostenden, ernährungsphysiologisch indifferenten, Werkstoff, vorzugsweise Stahl, besteht.Hygienic training of the stop piece is guaranteed if it's from a stainless, 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 dimension and material certain deformation resistance of the Stop piece is chosen so that an elastic or permanent deformation under the long-lasting influence the helical compression spring is omitted. In this way is an unchanged preload of the Secured helical compression spring; the preload can be chosen very high, so that a correspondingly high Tension can be generated when the stop piece for example on a spring loaded by the helical compression spring, against their spring force releasable clamping piece is used.
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 clamping piece, in particular for use a conveyor chain for tensioning and subsequent transport a packaging film web in a packaging machine, is advantageous on a chain link provided as a link chain conveyor 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 be made such that the lead screw transversely to the conveying direction on a bearing block is axially movable, the U-shaped from a on the chain link attached bracket and two Bearing tabs exist, the helical compression spring except strikes a bearing bracket on the stop piece, on the outside one with the lead screw one-piece clamping piece for the packaging film under the effect of the helical compression spring is present and against the effect of the helical compression spring can be lifted if the lead screw on an axially aligned, through the led other storage tab and overhang to this Push pin is loaded, for example by a Ring saddle of a chain wheel for the link chain. A such an arrangement uses the stop piece according to the invention very beneficial and is simple itself built up so that clamping pieces of this type in large Quantity produced cheaply and on the chain links the link chain can be attached. The requirements to the stop of the dimensionally stable, rigid training and the use of a stainless steel are realized with very little effort, so that Overall clamping piece without hesitation even when packing of food can be used.
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 favorable 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 necessary, the retaining groove on the lead screw is provided so that at the first bracket adjacent clamping piece the stop piece from the second Bearing bracket is at least slightly spaced.
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 is always applicable to advantage when on Clamping pieces of the type described very high prestressing forces the helical compression spring must be mastered; however, it is by no means limited to this. The stop piece according to the invention is generally as a lock 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 is one for driving a packaging film web suitable link chain GK in the area a sprocket mounted on a fixed shaft W. To recognize KR, which is composed of chain links KG is. There is a tensioning piece on each chain link KG S attached, as explained in detail in Figures 3 and 4 is.
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 clamping piece S consists of one
the associated chain link KG attachable, for example
riveted
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 in the front view of FIG. 3, from a
Sheet metal folded
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 one hand, there is a
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 - 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.The section of Figure 4 shows how the
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
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
Claims (8)
- A gripping member (S), in particular for packaging machines, with a bearing plate (12), a guide spindle (2) mounted in the bearing plate (12) and having a clamping member (22) secured to the said guide spindle (2), a helical compression spring (3) surrounding the guide spindle (2), and a stop member (4) for the helical compression spring (3), wherein the stop member (4) is provided, in an axially orientated manner, in a radial concentric retaining channel (23) in the guide spindle (2),
characterized in that(a) the stop member (4) comprises a flat, circular base plate (41) and an annular cylindrical collar (42) pointing on the outer edge (41a) of the base plate (41) in the direction towards the end (31) of the spring and embracing the end (31) of the spring at least for the greater part,(b) the inner edge (43a) of the base plate (41) resting on the base (23a) of the retaining channel (23) is joined to the outer edge (41a) by an insertion slot (44), wherein the width (b) of the insertion slot (44) is adapted to the diameter (g) at the base (23a) of the retaining channel (23) and is dimensioned in such a way that the stop member (4) can still be slid onto the base (23a) of the retaining channel (23) without clamping, and the collar (42) is interrupted parallel and symmetrically to the insertion slot (44) by an aperture (42a), the width (k) of which is at least equal to the diameter (f) of the guide spindle (2) and is preferably slightly larger than the latter. - A gripping member according to Claim 1, characterized in that the collar (42) is formed by a flanging-over on the outer edge (41a) of the base plate (41).
- A gripping member according to one of Claims 1 and 2, characterized in that it consists of a stainless, nutritionally neutral material, preferably steel.
- A gripping member according to one of Claims 1 to 3, characterized in that its deformation resistance determined by its dimensions and material is selected in such a way that a resilient or permanent deformation under the long-lasting effect of the helical compression spring (3) is eliminated.
- A gripping member according to one of Claims 1 to 4, characterized in that it is provided on a link (KG) of a conveying chain constructed in the form of an open-link chain (GK).
- A gripping member according to Claim 5, characterized in that the guide spindle (2) is mounted so as to be axially movable transversely to the conveying direction on a bearing stand (1) which is formed, in the shape of a U, by a retaining plate (11) secured to the chain link (KG) and two bearing plates (12a), wherein the helical compression spring (3) (still) strikes - apart from against the stop member (4) - against the bearing plate (12a) against which the clamping member (22), integral with the guide spindle (2), for the packaging foil rests on the outside under the action of the helical compression spring (3) and can be lifted against the action of the helical compression spring (3) if the guide spindle (2) is loaded on an axially aligned thrust pin (21) passing through the other bearing plate (12b) and projecting beyond the said bearing plate (12b), for example by an annular saddle (RS) of a chain wheel (KR) for the open-link chain (GK).
- A gripping member according to one of Claims 1 to 6, characterized in that the width (r) of the retaining channel (23) is at least equal to the thickness (d) of the base plate (41), but is preferably at least slightly greater than the latter.
- A gripping member according to one of Claims 5 to 7, characterized in that the retaining channel (23) is provided on the guide spindle (2) in such a way that when the clamping member (22) rests against the first bearing plate (12a) the stop member (4) is spaced at least slightly from the second bearing plate (12b).
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 EP0753460A1 (en) | 1997-01-15 |
| EP0753460B1 true 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) |
Families Citing this family (11)
| 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 |
| DE202006008577U1 (en) * | 2006-05-30 | 2007-10-11 | JOH. WINKLHOFER & SÖHNE GMBH & Co. KG | Conveyor chain with gripper tappet guide |
| DE202006008576U1 (en) * | 2006-05-30 | 2007-10-04 | Joh. Winklhofer & Söhne GmbH und Co KG | Conveyor chain with hinged gripper head |
| DE202006008575U1 (en) * | 2006-05-30 | 2007-10-25 | Joh. Winklhofer & Söhne GmbH und Co KG | Conveyor chain with swiveling gripper head |
| 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 |
| DE102016214431A1 (en) * | 2016-08-04 | 2018-02-08 | Multivac Sepp Haggenmüller Se & Co. Kg | Thermoforming packaging machine with retaining strip |
| 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 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE2355921C3 (en) * | 1973-11-08 | 1979-08-23 | Hermann Waldner Gmbh & Co, 7988 Wangen | Material web conveyor |
| 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 |
| DE3022065C2 (en) * | 1980-06-12 | 1983-09-29 | Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden | 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 |
| 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
Also Published As
| Publication number | Publication date |
|---|---|
| DE19525523A1 (en) | 1997-01-16 |
| DE59601250D1 (en) | 1999-03-18 |
| DK0753460T3 (en) | 1999-09-20 |
| EP0753460A1 (en) | 1997-01-15 |
| ES2128805T3 (en) | 1999-05-16 |
| ATE176433T1 (en) | 1999-02-15 |
| US5702044A (en) | 1997-12-30 |
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