EP1711411B1 - Profile closing clip - Google Patents

Profile closing clip Download PDF

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Publication number
EP1711411B1
EP1711411B1 EP05707227A EP05707227A EP1711411B1 EP 1711411 B1 EP1711411 B1 EP 1711411B1 EP 05707227 A EP05707227 A EP 05707227A EP 05707227 A EP05707227 A EP 05707227A EP 1711411 B1 EP1711411 B1 EP 1711411B1
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EP
European Patent Office
Prior art keywords
clip
profile
closure clip
closure
plane
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 - Fee Related
Application number
EP05707227A
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German (de)
French (fr)
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EP1711411A1 (en
EP1711411B2 (en
Inventor
Stefan Schaap
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poly Clip System GmbH and Co KG
Original Assignee
SCHAAP Stefan
Poly Clip System GmbH and Co KG
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Application filed by SCHAAP Stefan, Poly Clip System GmbH and Co KG filed Critical SCHAAP Stefan
Publication of EP1711411A1 publication Critical patent/EP1711411A1/en
Publication of EP1711411B1 publication Critical patent/EP1711411B1/en
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Publication of EP1711411B2 publication Critical patent/EP1711411B2/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/1616Elements constricting the neck of the bag
    • B65D33/1641Staples, clips or clamps made of metal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/1616Elements constricting the neck of the bag
    • B65D33/1625Small plates or the like made of one piece and presenting slits or a central aperture to jam the neck of the bag

Definitions

  • the invention relates to a closure clip (hereinafter also referred to as a clip) for closing tubular or bag-like, gathered packaging material with two legs connecting a clip plane and connected by a connecting section.
  • a closure clip hereinafter also referred to as a clip
  • Such essentially U-shaped closure clips are well known. They are lined up for the purpose of magazining typically with parallel brackets levels in large numbers one behind the other to a kind of rod and fixed on the outside of the packaging section facing away from the packaging material by means of an adhesive or sealing strip, so that the clip bar is stabilized.
  • a clip bar is transported perpendicular to the guideway of a displaceable punch of a Veschown owned and inserted with its front end in the guideway.
  • the driven punch separates the foremost clip from the subsequent clips of the clip bar and transports it along its guideway until the legs of the clip engage around the packaging material in the area gathered to form a pigtail.
  • the legs of the clip are pressed against a die with a guideway bent so that the clip surrounds closed enclosing the packaging material, wherein the legs in the closed state a little out of the bracket plane, parallel to each other to come to rest.
  • a closure clip is known, the cross-sectional profile - starting from a round profile - oval to improve the weight-to-bending resistance ratio, wherein the height of the cross-sectional profile, ie the profile extent in the clip plane, determined by the large axis of the oval and thus greater than its width, so the profile extent perpendicular to the clip plane.
  • a clamp requires less material than a closure clamp with a round cross-section with the same stability or, in other words, has a higher resistance moment with the same material requirement.
  • This cross-sectional profile is based on the endeavor to increase the bending stiffness with the least possible use of material.
  • there are further requirements influencing the clip profile such as the guidance of the closure clip in the guideway and the die, a slip-resistant inner surface or an inner surface with rounded edges to avoid injuries to the packaging wrapper to be closed.
  • US 3,541,647 discloses a closure clip according to the preamble of claim 1.
  • the object is to provide a closure clip with a further improved locking force at the same cost of materials that is easy to manufacture and magazineable.
  • the cross-sectional profile of the material strand forming the clip according to the invention preferably has lateral edges over the entire length of the clip, ie profile edges bordering the width of the clip, one of which has a recess and the other has a projection.
  • the projection and the recess are dimensioned so that they can interlock in the closed state of the clip.
  • the cross-sectional profile for manufacturing reasons, preferably over the entire length of the closure clip is uniform.
  • the invention is, however, not limited thereto.
  • the improved locking force can be achieved even if the claimed profiling is limited only to the region of the legs.
  • the projection has a convex radius and the recess has a concave radius of the same size. As a result, the positive connection can be improved.
  • the height of the cross-sectional profile is greater than its width (profile extent perpendicular to the clip plane).
  • the moment of resistance increases in the square, so that at a corresponding ratio of height to width a desired, decisive for the locking force resistance torque is achieved with the least possible use of materials.
  • the cross-sectional profile preferably has a height which is greater by 1/3 to 1/2 than the width.
  • the aforementioned closure clip 100 typically has the U-shaped initial shape shown in FIGS. 1A and 1B prior to sealing the packaging material. Two legs 110 and 112 pass over radii in a connecting portion 114 connecting them.
  • the closure clip 100 may be made of various materials such as steel and aluminum. It is preferably bent from a straight strand of material into the shape shown in Fig. 1A.
  • the legs 110, 112 each have a chamfer 116 or 118 on its outer side 120, which serves to control the deflection of the legs when closing the clip in the die and to let go with minimal friction.
  • the two legs define a clip plane, which is shown as a dotted line 122 in Fig. 1B.
  • the width of the clip is determined by two spaced side surfaces 124 and 126 parallel to the clip plane.
  • Fig. 2A shows a first embodiment of the clip 200 according to the invention in the closed, the shirred portion of a packaging material (not shown) embracing shape.
  • the two legs 210 and 212 are parallel here and at the same height next to each other (in this illustration, one behind the other).
  • the peculiarity of the clip according to the invention can be seen for the first time in the sectional view of this embodiment shown in FIG. 2B.
  • the section shows that the cross-sectional profile 230 (shown hatched) of the material strand forming the clip is lateral, i. formed by the side surfaces 224, 226 profile edges, each having a first projection 232 and 234 and a second projection 242 and 244, between which a respective recess 252 and 254 is included.
  • the cross-sectional profile of this preferred embodiment is designed (in the undeformed shape) mirror-symmetrical to the clip plane 222.
  • a mirror-symmetrical profile has the advantage that when bending the legs no bending or tilting moments pointing out of the bracket plane occur, which can lead to problems when closing the clip. Furthermore, it is not important to magazine the locking device on the orientation of the clip or the clip bar.
  • the projections 232, 234 and 242, 244 and recesses 252, 254 are opposite the two sides of the profile.
  • a positive connection does not occur if, as can be seen in FIGS. 2A and 2B, the clip is bent over when closing so that the legs 210, 212 are arranged parallel to one another at the same height.
  • the clamping force of the clip according to the invention alone determined on the bending stiffness or moment of resistance.
  • the cross-sectional profile shown in Figure 2B is optimized.
  • the height of the cross-sectional profile is advantageously greater than its width, since the moment of resistance increases quadratically with increasing height of the profile.
  • the ratio of moment of resistance and material use is additionally improved by the lateral recesses. These are provided in this embodiment particularly advantageous in the region of the neutral zone, which is neither compressed nor stretched during the forming.
  • the width of the projections 232, 234, 242, 244 (extension of the projections parallel to the clip plane) in this embodiment is less than the width of the recesses 252, 254. Therefore, they are suitable to engage in the closed state of the clip 200 into one another and so on To ensure positive engagement.
  • the clip as can be seen in FIGS. 3A to 3C, has to be bent in a die during closing in such a way that the legs 310, 312 lie parallel to one another but offset in height from each other.
  • the first projection 334 of the one lateral profile edge of the second leg 312 then engages in the recess 352 of the opposite lateral profile edge of the first leg 310.
  • the second projection 342 of the one side profile edge of the first leg 310 engages in the recess 354 of the opposite lateral profile edge of the second leg 312.
  • the double teeth thus obtained provides increased security against the spreading of the closed clip.
  • the recesses 352, 354 have a double function in this case, namely material savings on the one hand and positive fit on the other.
  • the clip takes on a more space-saving design in this type of closure, since the width of the closed clip is reduced compared to the sum of both leg widths by the depth of the recesses (expansion of the recesses in the direction perpendicular to the clip plane).
  • the width of the projections and recesses i. their extent parallel to the clip plane, identical. More specifically, the protrusions have a convex radius and the recesses have a concave radius of equal size.
  • both lateral profile edges have first projections 232, 234, 332, 334 and second projections 242, 244, 342, 344, between which the recesses 252, 254, 352, 354 are included.
  • the first protrusions 232, 234, 332, 334 respectively merge into the inner surface 260, 360 facing the packaging material and the second protrusions 242, 244, 342, 344 extend into the outer surface 270, 370 of the closure clip 200, 300 facing away from the packaging material.
  • the width of the clips in the area of the inner surface (inner width) and outer surface (outer width) is the largest.
  • this "double T-profile” has the further advantage of lower susceptibility to interference: indeed, all the corners present on the profile are rounded in order to avoid damaging the packaging material.
  • the outer surface 270, 370 at least in the region of the connecting portion 214, 314 but transitional edges with both side profile edges forming side surfaces 224, 226, 324, 326, wherein the transition edges have radii which are less than or equal to 0.5 mm are.
  • Such “sharp” transition edges prove to be advantageous in that, in cooperation with the punch driven along its guideway, they affix the adhesive or sealing strip which clips the clips Rod fixed, shear when separating the foremost clip and thus secure process separation.
  • the outer surface can be used for a codification or other embossing with a characteristic or technical-functional purpose.
  • an approximately triangular, extending in the longitudinal direction of the material strand groove are mounted, in which engages the punch.
  • the sealing effect of the clip is significantly improved. Furthermore, there is enough space available on the inner surface of the clip to attach imprints with a technical purpose.
  • the inner surface can be provided with at least one notch or groove in the longitudinal direction of the material strand. As a result, the risk of slipping of the closed clip of the packaging material, in particular plastic film is reduced.
  • FIGS. 4A and 4B A further embodiment of the clip 400 according to the invention is shown in FIGS. 4A and 4B, which has a cross-sectional profile which is not mirror-symmetrical to the clip plane 422 but point-symmetrical to the center 423 of the profile.
  • a clip with this profile can be closed so that the legs 410, 412 are parallel to each other without height offset, yet a positive connection is achieved because the projection 432 of a side profile edge of the recess 454 in the other side profile edge opposite and vice versa.
  • the advantage is that at this shape of the positive connection and thus an increased clamping force and a space-saving shape can be achieved while both legs in the closed state of the shirred packaging material (not shown) rest, which at the same time an even safer sealing of the packaging and adhesion is given on the braid.
  • the projections and recesses are provided with the same radii, so that the form-fitting is ensured even with axially twisted legs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Package Closures (AREA)

Description

Die Erfindung betrifft eine Verschlussklammer (nachfolgend auch Clip genannt) zum Verschließen von schlauch- oder beutelartigem, gerafftem Verpackungsmaterial mit zwei eine Klammerebene aufspannenden, durch einen Verbindungsabschnitt verbundenen Schenkeln.The invention relates to a closure clip (hereinafter also referred to as a clip) for closing tubular or bag-like, gathered packaging material with two legs connecting a clip plane and connected by a connecting section.

Solche im Wesentlichen meist U-förmig ausgebildeten Verschlussklammern sind zahlreich bekannt. Sie sind zum Zweck der Magazinierung typischerweise mit parallelen Klammerebenen in großer Zahl hintereinander zu einer Art Stange aufgereiht und auf der dem Verpackungsmaterial abgewandten Außenseite des Verbindungsabschnittes mittels eines Kleb- oder Siegelstreifens miteinander fixiert, so dass die Clipstange stabilisiert ist. Zum Verschließen des Verpackungsmaterials wird eine solche Clipstange senkrecht zur Führungsbahn eines verschieblichen Stempels einer Veschließeinrichtung transportiert und mit ihrem vorderen Ende in die Führungsbahn eingeführt. Der angetriebene Stempel trennt den vordersten Clip von den nachfolgenden Clips der Clipstange ab und transportiert ihn entlang seiner Führungsbahn bis die Schenkel des Clips das Verpackungsmaterial in dem zu einem Zopf gerafften Bereich umgreifen. Auf dem letzten Stück der Stempelbewegung werden die Schenkel des Clips unter Druck gegen eine Matrize mit einer Führungsbahn dergestalt umgebogen, dass der Clip ringförmig geschlossen das Verpackungsmaterial umgreift, wobei die Schenkel im verschlossenen Zustand ein wenig aus der Klammerebene herausgedreht, parallel nebeneinander zu liegen kommen.Such essentially U-shaped closure clips are well known. They are lined up for the purpose of magazining typically with parallel brackets levels in large numbers one behind the other to a kind of rod and fixed on the outside of the packaging section facing away from the packaging material by means of an adhesive or sealing strip, so that the clip bar is stabilized. For closing the packaging material, such a clip bar is transported perpendicular to the guideway of a displaceable punch of a Veschließeinrichtung and inserted with its front end in the guideway. The driven punch separates the foremost clip from the subsequent clips of the clip bar and transports it along its guideway until the legs of the clip engage around the packaging material in the area gathered to form a pigtail. On the last piece of punch movement, the legs of the clip are pressed against a die with a guideway bent so that the clip surrounds closed enclosing the packaging material, wherein the legs in the closed state a little out of the bracket plane, parallel to each other to come to rest.

Die zur Herstellung solcher Verschlussklammern verwendeten Materialstränge oder Drähte - es handelt sich vorzugsweise um Metalldrähte und besonders bevorzugt um Aluminiumdrähte - weisen bekanntermaßen verschiedene Querschnittesprofile auf.The material strands or wires used for producing such closure clips-preferably metal wires and particularly preferably aluminum wires-are known to have different cross-sectional profiles.

Aus der DE 1 536 183 ist beispielsweise eine Verschlussklammer bekannt, deren Querschnittsprofil - ausgehend von einem runden Profil - zur Verbesserung des Gewicht-zu-Biegewiderstand-Verhältnisses oval geformt ist, wobei die Höhe des Querschnittsprofils, also die Profilausdehnung in der Klammerebene, durch große Achse des Ovals bestimmt und somit größer ist als dessen Breite, also die Profilausdehnung senkrecht zur Klammerebene. Eine solche Klammer benötigt gegenüber einer Verschlussklammer mit rundem Querschnitt bei gleicher Stabilität weniger Material oder weist, anders gesagt, bei gleichem Materialbedarf ein höheres Widerstandsmoment auf.From the DE 1 536 183 For example, a closure clip is known, the cross-sectional profile - starting from a round profile - oval to improve the weight-to-bending resistance ratio, wherein the height of the cross-sectional profile, ie the profile extent in the clip plane, determined by the large axis of the oval and thus greater than its width, so the profile extent perpendicular to the clip plane. Such a clamp requires less material than a closure clamp with a round cross-section with the same stability or, in other words, has a higher resistance moment with the same material requirement.

Auch aus der US 3,584,347 sind Klammern bekannt, deren Querschnittsprofile eine in der Klammerebene liegende Haupterstreckungsrichtung aufweisen. Anders als bei der ovalen Klammer ist aber deren Innenbreite, d.h. die Breite der Verschlussklammer auf der der zu verschließenden/ verschlossenen Verpackungshülle zugewandten Seite, größer als deren Außenbreite.Also from the US 3,584,347 Staples are known whose cross-sectional profiles have a lying in the staple plane main extension direction. Unlike the oval clip but whose inner width, ie the width of the closure clip on the side to be closed / closed packaging envelope facing side, larger than its outer width.

Auch diesem Querschnittsprofil liegt das Bestreben zu Grunde, die Biegesteifigkeit bei möglichst geringem Materialeinsatz zu erhöhen. Hinzu kommen weitere das Klammerprofil beeinflussende Anforderungen wie die Führung der Verschlussklammer in der Führungsbahn und der Matrize, eine abrutschsichere Innenoberfläche oder eine Innenoberfläche mit abgerundeten Kanten zur Vermeidung von Verletzungen der zu verschließenden Verpackungshülle.This cross-sectional profile is based on the endeavor to increase the bending stiffness with the least possible use of material. In addition there are further requirements influencing the clip profile, such as the guidance of the closure clip in the guideway and the die, a slip-resistant inner surface or an inner surface with rounded edges to avoid injuries to the packaging wrapper to be closed.

In der DE OS 1 959 755 tritt das Bestreben der Materialeinsparung bei gleichem Widerstandsmoment ferner darin zu Tage, dass die Verjüngung des Querschnittsprofils der dort offenbarten Verschlussklammer von der größeren Innen- zur geringeren Außenbreite über seitliche gekehlte Vertiefungen erfolgt.In the DE OS 1 959 755 occurs the effort of saving material at the same moment of resistance also evident that the tapering of the cross-sectional profile of the closure clip disclosed there takes place from the larger inner to smaller outer width on side grooved recesses.

US 3 541 647 offenbart eine Verschlussklammer gemäß dem Oberbegriff des Anspruchs 1. Aufgabe ist es, eine Verschlussklammer mit einer weiter verbesserten Zuhaltekraft bei gleichem Materialaufwand zu schaffen, die einfach herstellbar und magazinierbar ist. US 3,541,647 discloses a closure clip according to the preamble of claim 1. The object is to provide a closure clip with a further improved locking force at the same cost of materials that is easy to manufacture and magazineable.

Diese Aufgabe wird durch eine Verschlussklammer der eingangs genannten Art mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1 gelöst. Um beispielweise einen vollständig luftdichten Verschluss zu erreichen, müssen sehr starke radial nach innen gerichtete Druckkräfte auf das Verpackungsmaterial in dem zu einem Zopf gerafften Bereich einwirken und das Material fest zusammenpressen, was insbesondere für Kunststoff-Folien gilt.This object is achieved by a closure clip of the type mentioned with the features of the characterizing part of claim 1. For example, to achieve a completely airtight seal, very strong radially inwardly directed compressive forces must act on the packaging material in the area gathered to form a pigtail and firmly compress the material, which is especially true for plastic films.

Das Querschnittsprofil des den erfindungsgemäßen Clip bildenden Materialstrangs weist zu diesem Zweck vorzugsweise über die gesamte Länge des Clips seitliche, d.h. die Breite des Clips begrenzende, Profilränder auf, von denen der eine eine Ausnehmung und der andere einen Vorsprung aufweist. Der Vorsprung und die Ausnehmung sind so dimensioniert, dass sie im verschlossenen Zustand der Klammer ineinander greifen können. Somit kann beim Verschließen eine formschlüssige Verbindung ("Verzahnung") zwischen beiden umgelegten, parallel nebeneinander angeordneten Schenkeln des Clips erzielt werden. Die radial auswärts gerichteten Druckkräfte, welche das Verpackungsmaterial dem Clip entgegensetzt, werden auf diese Weise daran gehindert, den Clip wieder aufzuspreizen. Mit der erfindungsgemäßen Profilierung des Clipmateriais wird also zusätzlich zu der Materialeinsparung bei gleichbleibender Biegesteifigkeit, welche bei den bekannten Clips einzig den Fokus der Optimierung bildete, ein weiteres die Zuhaltekraft steigerndes Merkmal bereitgestellt, durch das aber keine nennenswerten Einbußen hinsichtlich der erzielten Materialeinsparung in Kauf genommen werden müssen.For this purpose, the cross-sectional profile of the material strand forming the clip according to the invention preferably has lateral edges over the entire length of the clip, ie profile edges bordering the width of the clip, one of which has a recess and the other has a projection. The projection and the recess are dimensioned so that they can interlock in the closed state of the clip. Thus, when closing a positive connection ("toothing") between the two folded, parallel juxtaposed legs of the clip can be achieved. The radially outward pressure forces, which opposes the packaging material to the clip, are prevented in this way from spreading the clip again. With the profiling of the clip material according to the invention, in addition to the material savings with constant flexural rigidity, which formed the focus of optimization in the known clips, another feature increasing the locking force is provided by which, however, no noteworthy losses with regard to the material savings achieved are accepted have to.

Es sei an dieser Stelle angemerkt, dass das Querschnittsprofil aus fertigungstechnischen Gründen vorzugsweise über die gesamte Länge der Verschlussklammer gleichmäßig ausgebildet ist. Die Erfindung ist hierauf aber nicht beschränkt. Insbesondere kann die verbesserte Zuhaltekraft auch dann erzielt werden, wenn die beanspruchte Profilierung nur auf den Bereich der Schenkel beschränkt ist.It should be noted at this point that the cross-sectional profile for manufacturing reasons, preferably over the entire length of the closure clip is uniform. The invention is, however, not limited thereto. In particular, the improved locking force can be achieved even if the claimed profiling is limited only to the region of the legs.

Gemäß einer vorteilhaften Ausführungsform weisen der Vorsprung einen konvexen Radius und die Ausnehmung einen konkaven Radius gleicher Größe auf. Hierdurch kann der Formschluss verbessert werden.According to an advantageous embodiment, the projection has a convex radius and the recess has a concave radius of the same size. As a result, the positive connection can be improved.

Vorteilhaft ist es, wenn die Höhe des Querschnittsprofils (Profilausdehnung in der Klammerebene) größer als dessen Breite (Profilausdehnung senkrecht zur Klammerebene) ist. Mit größer werdender Höhe des Profils wächst das Widerstandsmoment im Quadrat, so dass bei einem entsprechenden Verhältnis von Höhe zu Breite ein gewünschtes, für die Zuhaltekraft entscheidendes Widerstandsmoment bei möglichst geringem Materialeinsatz erzielt wird. Das Querschnittsprofil weist insbesondere vorzugsweise eine Höhe auf, die um 1/3 bis 1/2 größer ist als die Breite.It is advantageous if the height of the cross-sectional profile (profile extent in the clip plane) is greater than its width (profile extent perpendicular to the clip plane). With increasing height of the profile, the moment of resistance increases in the square, so that at a corresponding ratio of height to width a desired, decisive for the locking force resistance torque is achieved with the least possible use of materials. In particular, the cross-sectional profile preferably has a height which is greater by 1/3 to 1/2 than the width.

Diese und weitere Aufgaben, Merkmale und Vorteile der Erfindung werden nun anhand von Ausführungsbeispielen mit Hilfe der Zeichnungen näher erläutern. Es zeigen:

Fig. 1A
eine Vorderansicht einer offenen Verschlussklammer;
Fig. 1B
eine Seitenansicht der offenen Verschlussklammer gemäß Fig. 1A;
Fig. 2A
eine Vorderansicht einer ersten Ausführungsform der erfindungsgemäßen, verschlossenen Verschlussklammer;
Fig. 2B
einen Schnitt durch die verschlossene Verschlussklammer gemäß der Ausführungsform aus Fig. 2A;
Fig. 3A
eine Vorderansicht einer zweiten Ausführungsform der erfindungsgemäßen, verschlossenen Verschlussklammer;
Fig. 3B
einen Schnitt durch die verschlossene Verschlussklammer gemäß der Ausführungsform aus Fig. 3A;
Fig. 3C
einen Schnitt durch die verschlossene Verschlussklammer gemäß der Ausführungsform aus Fig. 3A mit verdrehten Schenkeln;
Fig. 4A
eine Vorderansicht einer dritten Ausführungsform der erfindungsgemäßen, verschlossenen Verschlussklammer; und
Fig.4B
einen Schnitt durch die verschlossene Verschlussklammer gemäß der Ausführungsform aus Fig. 4A.
These and other objects, features and advantages of the invention will now be explained in more detail by means of exemplary embodiments with the aid of the drawings. Show it:
Fig. 1A
a front view of an open closure clip;
Fig. 1B
a side view of the open closure clip of FIG. 1A;
Fig. 2A
a front view of a first embodiment of the invention, closed closure clip;
Fig. 2B
a section through the closed closure clip according to the embodiment of Fig. 2A;
Fig. 3A
a front view of a second embodiment of the invention, closed closure clip;
Fig. 3B
a section through the closed closure clip according to the embodiment of Fig. 3A;
Fig. 3C
a section through the closed closure clip according to the embodiment of Figure 3A with twisted legs.
Fig. 4A
a front view of a third embodiment of the invention, closed closure clip; and
4B
a section through the closed closure clip according to the embodiment of Fig. 4A.

Die eingangs genannte Verschlussklammer 100 weist typischerweise die in Fig. 1A und 1B dargestellte U-förmige Ausgangsgestalt vor dem Verschließen des Verpackungsmaterials auf. Zwei Schenkel 110 und 112 gehen über Radien in einen sie verbindenden Verbindungsabschnitt 114 über. Die Verschlussklammer 100 kann aus verschiedenen Materialien wie Stahl und Aluminium bestehen. Sie wird vorzugsweise aus einem geraden Materialstrang in die in Fig. 1A gezeigte Gestalt gebogen.The aforementioned closure clip 100 typically has the U-shaped initial shape shown in FIGS. 1A and 1B prior to sealing the packaging material. Two legs 110 and 112 pass over radii in a connecting portion 114 connecting them. The closure clip 100 may be made of various materials such as steel and aluminum. It is preferably bent from a straight strand of material into the shape shown in Fig. 1A.

Die Schenkel 110, 112 weisen jeweils eine Anschrägung 116 bzw. 118 auf ihrer Außenseite 120 auf, die dazu dient, die Umlenkung der Schenkel beim Verschließen des Clips in der Matrize kontrolliert und mit möglichst geringer Reibung vonstatten gehen zu lassen. Die beiden Schenkel definieren eine Klammerebene, die als strichpunktierte Linie 122 in Fig. 1B eingezeichnet ist. Die Breite des Clips wird durch zwei beabstandete zu der Klammerebene parallele Seitenflächen 124 und 126 bestimmt.The legs 110, 112 each have a chamfer 116 or 118 on its outer side 120, which serves to control the deflection of the legs when closing the clip in the die and to let go with minimal friction. The two legs define a clip plane, which is shown as a dotted line 122 in Fig. 1B. The width of the clip is determined by two spaced side surfaces 124 and 126 parallel to the clip plane.

Fig. 2A zeigt ein erstes Ausführungsbeispiel des erfindungsgemäßen Clips 200 in der geschlossenen, den gerafften Abschnitt eines Verpackungsmaterials (nicht gezeigt) umgreifenden Gestalt. Die beiden Schenkel 210 und 212 liegen hier parallel und auf gleicher Höhe nebeneinander (in dieser Darstellung hintereinander). Die Besonderheit des erfindungsgemäßen Clips wird erstmals in der in Fig. 2B gezeigten Schnittdarstellung dieses Ausführungsbeispiels erkennbar. Der Schnitt zeigt, dass das Querschnittsprofil 230 (schraffiert dargestellt) des den Clip bildenden Materialstrangs seitliche, d.h. durch die Seitenflächen 224, 226 gebildete Profilränder aufweist, die jeweils einen ersten Vorsprung 232 bzw. 234 und einen zweiten Vorsprung 242 bzw. 244 aufweisen, zwischen denen jeweils eine Ausnehmung 252 bzw. 254 eingeschlossen ist.Fig. 2A shows a first embodiment of the clip 200 according to the invention in the closed, the shirred portion of a packaging material (not shown) embracing shape. The two legs 210 and 212 are parallel here and at the same height next to each other (in this illustration, one behind the other). The peculiarity of the clip according to the invention can be seen for the first time in the sectional view of this embodiment shown in FIG. 2B. The section shows that the cross-sectional profile 230 (shown hatched) of the material strand forming the clip is lateral, i. formed by the side surfaces 224, 226 profile edges, each having a first projection 232 and 234 and a second projection 242 and 244, between which a respective recess 252 and 254 is included.

Das Querschnittsprofil dieser bevorzugten Ausführungsform ist (in der unverformten Gestalt) spiegelsymmetrisch zur Klammerebene 222 ausgestaltet. Ein spiegelsymmetrisches Profil hat den Vorteil, dass beim Umbiegen der Schenkel keine aus der Klammerebene weisenden Biege- oder Kippmomente auftreten, die beim Verschließen des Clips zu Problemen führen können. Ferner kommt es beim Magazinieren der Verschlusseinrichtung nicht auf die Orientierung des Clips bzw. der Clipstange an.The cross-sectional profile of this preferred embodiment is designed (in the undeformed shape) mirror-symmetrical to the clip plane 222. A mirror-symmetrical profile has the advantage that when bending the legs no bending or tilting moments pointing out of the bracket plane occur, which can lead to problems when closing the clip. Furthermore, it is not important to magazine the locking device on the orientation of the clip or the clip bar.

Aufgrund der Symmetrie liegen die Vorsprünge 232, 234 und 242, 244 und Ausnehmungen 252, 254 der beiden Seiten des Profils gegenüber. Dadurch tritt ein Formschluss nicht ein, wenn der Clip, wie in Fig. 2A und 2B ersichtlich, beim Verschließen so umgebogen wird, dass die Schenkel 210, 212 parallel nebeneinander auf gleicher Höhe angeordnet sind. Bei dieser Umformung wird die Zuhaltekraft der erfindungsgemäßen Klammer, allein über deren Biegesteifigkeit oder Widerstandsmoment bestimmt. In dieser Hinsicht ist das in Figur 2B gezeigte Querschnittsprofil jedoch optimiert. Insbesondere ist die Höhe des Querschnittsprofils vorteilhafterweise größer als dessen Breite, da das Widerstandsmoment quadratisch mit größer werdender Höhe des Profils ansteigt. Bei dem besonders bevorzugten Höhe-zu-Breite-Verhältnis von 1 1/3 : 1 bis 1,5 : 1 wird ein optimales Verhältnis aus Widerstandsmoment und Materialeinsatz erreicht. Bei dieser im Grunde rechteckigen Querschnittsgeometrie und dem genannten Seitenverhältnis ergibt sich ungefähr eine doppelt so große Zuhaltekraft auf den Zopf wie bei einem runden gleichgroßen Querschnitt.Due to the symmetry, the projections 232, 234 and 242, 244 and recesses 252, 254 are opposite the two sides of the profile. As a result, a positive connection does not occur if, as can be seen in FIGS. 2A and 2B, the clip is bent over when closing so that the legs 210, 212 are arranged parallel to one another at the same height. In this transformation, the clamping force of the clip according to the invention, alone determined on the bending stiffness or moment of resistance. In this regard, however, the cross-sectional profile shown in Figure 2B is optimized. In particular, the height of the cross-sectional profile is advantageously greater than its width, since the moment of resistance increases quadratically with increasing height of the profile. In the most preferred height-to-width ratio of 1 1/3: 1 to 1.5: 1, an optimum ratio of resistance moment and material usage is achieved. This basically rectangular cross-sectional geometry and the mentioned aspect ratio results in approximately twice the clamping force on the braid as in a round, uniform cross-section.

Das Verhältnis aus Widerstandsmoment und Materialeinsatz wird zusätzlich durch die seitlichen Aussparungen verbessert. Diese sind bei dieser Ausführungsform besonders vorteilhaft im Bereich der neutralen Zone vorgesehen, die bei der Umformung weder gestaucht noch gestreckt wird.The ratio of moment of resistance and material use is additionally improved by the lateral recesses. These are provided in this embodiment particularly advantageous in the region of the neutral zone, which is neither compressed nor stretched during the forming.

Die Breite der Vorsprünge 232, 234, 242, 244 (Ausdehnung der Vorsprünge parallel zur Klammerebene) ist bei dieser Ausführungsform geringer als die Breite der Ausnehmungen 252, 254. Daher sind sie geeignet, im verschlossenen Zustand der Klammer 200 ineinander zu greifen und so einen Formschluss zu gewährleisten. Hierzu muss der Clip, wie in Fig. 3A bis 3C erkennbar wird, beim Verschließen so in einer Matrize umgebogen werden, dass die Schenkel 310, 312 parallel nebeneinander aber in der Höhe zueinander versetzt liegen. Der erste Vorsprung 334 des einen seitlichen Profilrandes des zweiten Schenkels 312 greift dann in die Aussparung 352 des gegenüberliegenden seitlichen Profilrandes des ersten Schenkels 310 ein. Umgekehrt greift bei diesem Profil der zweite Vorsprung 342 des einen seitlichen Profilrandes des ersten Schenkels 310 in die Aussparung 354 des gegenüberliegenden seitlichen Profilrandes des zweiten Schenkels 312 ein. Die so erzielte doppelte Verzahnung bietet eine erhöhte Sicherheit gegen das Aufspreizen des verschlossenen Clips. Die Aussparungen 352, 354 haben in diesem Fall eine doppelte Funktion, nämlich Materialersparnis einerseits und Formschluss andererseits.The width of the projections 232, 234, 242, 244 (extension of the projections parallel to the clip plane) in this embodiment is less than the width of the recesses 252, 254. Therefore, they are suitable to engage in the closed state of the clip 200 into one another and so on To ensure positive engagement. For this purpose, the clip, as can be seen in FIGS. 3A to 3C, has to be bent in a die during closing in such a way that the legs 310, 312 lie parallel to one another but offset in height from each other. The first projection 334 of the one lateral profile edge of the second leg 312 then engages in the recess 352 of the opposite lateral profile edge of the first leg 310. Conversely, in this profile, the second projection 342 of the one side profile edge of the first leg 310 engages in the recess 354 of the opposite lateral profile edge of the second leg 312. The double teeth thus obtained provides increased security against the spreading of the closed clip. The recesses 352, 354 have a double function in this case, namely material savings on the one hand and positive fit on the other.

Der Clip nimmt bei dieser Art des Verschließens eine platzsparendere Gestalt an, da die Breite des verschlossenen Clips gegenüber der Summe beider Schenkelbreiten um die Tiefe der Aussparungen (Ausdehnung der Aussparungen in Richtung senkrecht zur Klammerebene) vermindert ist.The clip takes on a more space-saving design in this type of closure, since the width of the closed clip is reduced compared to the sum of both leg widths by the depth of the recesses (expansion of the recesses in the direction perpendicular to the clip plane).

Im Gegensatz zu der Ausführungsform gemäß Fig. 2 ist bei dem Beispiel aus Fig. 3 die Breite der Vorsprünge und Ausnehmungen, d.h. deren Ausdehnung parallel zur Klammerebene, identisch. Genauer gesagt weisen die Vorsprünge einen konvexen Radius und die Aussparungen einen konkaven Radius gleicher Größe auf. Dies trägt einer beim Verschließen verursachten Verdrehung der Schenkel Rechnung: Da beim Verschließen des Clip ein seitlicher Versatz der Schenkel aus der Klammerebene heraus erfolgen muss, damit diese nebeneinander zu liegen kommen, wird der Materialstrang im Bereich des Verbindungsabschnitts 314 sowie der Biegungen 316, 318 verdrillt. Dadurch wird auch das Querschnittsprofil im Bereich der Schenkel 310, 312 gegenüber der Klammerebene um einen kleinen Winkel α um die Zentrumsachse des Materialstranges verdreht, wie in Fig. 3C übertrieben dargestellt ist. Durch die gleichen Radien der Vorsprünge und der Ausnehmungen bleibt der Formschluss jedoch unabhängig von dem Winkel α gleich.In contrast to the embodiment of FIG. 2, in the example of FIG. 3, the width of the projections and recesses, i. their extent parallel to the clip plane, identical. More specifically, the protrusions have a convex radius and the recesses have a concave radius of equal size. This contributes to a twisting of the legs caused during closing: Since a lateral offset of the legs from the bracket plane must take place when the clip is closed, so that they come to lie next to one another, the material strand is twisted in the region of the connecting section 314 and the bends 316, 318 , As a result, the cross-sectional profile in the region of the legs 310, 312 is also rotated relative to the plane of the bracket by a small angle α about the center axis of the material strand, as exaggeratedly shown in FIG. 3C. However, due to the same radii of the projections and the recesses, the positive connection remains independent of the angle α.

Beiden Ausführungsformen aus Fig. 2 und Fig. 3 ist gemeinsam, dass jeweils beide seitlichen Profilränder erste Vorsprünge 232, 234, 332, 334 und zweite Vorsprünge 242, 244, 342, 344 aufweisen, zwischen denen die Ausnehmungen 252, 254, 352, 354 eingeschlossen sind. Die ersten Vorsprünge 232, 234, 332, 334 gehen jeweils in die dem Verpackungsmaterial zugewandte Innenfläche 260, 360 und die zweiten Vorsprünge 242, 244, 342, 344 in die dem Verpackungsmaterial abgewandte Außenfläche 270, 370 der Verschlussklammer 200, 300 über. Dadurch ist die Breite der Clips im Bereich der Innenfläche (Innenbreite) und Außenfläche (Außenbreite) am größten.Both embodiments of FIGS. 2 and 3 have in common that both lateral profile edges have first projections 232, 234, 332, 334 and second projections 242, 244, 342, 344, between which the recesses 252, 254, 352, 354 are included. The first protrusions 232, 234, 332, 334 respectively merge into the inner surface 260, 360 facing the packaging material and the second protrusions 242, 244, 342, 344 extend into the outer surface 270, 370 of the closure clip 200, 300 facing away from the packaging material. As a result, the width of the clips in the area of the inner surface (inner width) and outer surface (outer width) is the largest.

Dieses "Doppel-T-Profil" hat neben den oben genannten Vorteilen den weiteren Vorteil geringerer Störanfälligkeit im Einsatz: Zwar sind alle am Profil vorhandenen Ecken verrundet, um eine Beschädigung des Verpackungsmaterials zu vermeiden. Bevorzugt bildet die Außenfläche 270, 370 wenigstens im Bereich des Verbindungsabschnitts 214, 314 aber Übergangskanten mit beiden die seitlichen Profilränder bildenden Seitenflächen 224, 226, 324, 326, wobei die Übergangskanten Radien aufweisen, welche kleiner oder gleich 0,5 mm sind. (Der größere Radius der Vorsprünge läuft also nicht tangential in die Außenfläche aus.) Solche "scharfen" Übergangskanten erweisen sich dahingehend als vorteilhaft, dass sie im Zusammenwirken mit dem entlang seiner Führungsbahn angetriebenen Stempel den Kleb- oder Siegelstreifen, der die Clips in Form einer Stange fixiert, beim Vereinzeln des vordersten Clip abscheren und damit prozesssicher abtrennen.In addition to the above-mentioned advantages, this "double T-profile" has the further advantage of lower susceptibility to interference: indeed, all the corners present on the profile are rounded in order to avoid damaging the packaging material. Preferably, the outer surface 270, 370 at least in the region of the connecting portion 214, 314 but transitional edges with both side profile edges forming side surfaces 224, 226, 324, 326, wherein the transition edges have radii which are less than or equal to 0.5 mm are. (Thus, the larger radius of the projections does not extend tangentially into the outer surface.) Such "sharp" transition edges prove to be advantageous in that, in cooperation with the punch driven along its guideway, they affix the adhesive or sealing strip which clips the clips Rod fixed, shear when separating the foremost clip and thus secure process separation.

Ferner kann bei einer Verschlussklammer, die einen solchen Querschnitt mit großer Außenbreite aufweist, die Außenfläche für eine Kodifizierung oder sonstige Prägungen mit kennzeichnendem oder technisch-funktionalem Zweck eingesetzt werden. Beispielsweise kann zur besseren Führung der Verschlussklammer durch den Stempel während des Verschließvorganges an der Außenfläche der Klammer eine etwa dreieckige, in Längsrichtung des Materialsranges verlaufende Nut angebracht werden, in die der Stempel eingreift.Further, in a closure clip having such a cross-section with a large outer width, the outer surface can be used for a codification or other embossing with a characteristic or technical-functional purpose. For example, for better guidance of the closure clip by the punch during the closing process on the outer surface of the clip, an approximately triangular, extending in the longitudinal direction of the material strand groove are mounted, in which engages the punch.

Durch die große Innenbreite des Querschnittsprofils wird die Abdichtwirkung des Clips erheblich verbessert. Ferner steht auf der Innenfläche des Clips genügend Platz zur Verfügung, um Prägungen mit technischem Zweck anbringen zu können. Beispielsweise kann bei einer vorteilhaften Ausführungsform die Innenfläche mit wenigstens einer Einkerbung oder Rille in Längserstreckungsrichtung des Materialstranges versehen werden. Hierdurch wird die Abrutschgefahr des verschlossenen Clips von dem Verpackungsmaterial, insbesondere bei Kunststofffolie, vermindert.Due to the large inner width of the cross-sectional profile, the sealing effect of the clip is significantly improved. Furthermore, there is enough space available on the inner surface of the clip to attach imprints with a technical purpose. For example, in an advantageous embodiment, the inner surface can be provided with at least one notch or groove in the longitudinal direction of the material strand. As a result, the risk of slipping of the closed clip of the packaging material, in particular plastic film is reduced.

In den Figuren 4A und 4B ist eine weitere Ausführungsform des erfindungsgemäßen Clips 400 dargestellt, die ein Querschnittsprofil aufweist, das nicht spiegelsymmetrisch zur Klammerebene 422 sondern punktsymmetrisch zum Mittelpunkt 423 des Profils ist. Ein Clip mit diesem Profil kann so verschlossen werden, dass die Schenkel 410, 412 ohne Höhenversatz parallel nebeneinander liegen, wobei dennoch ein Formschluss erreicht wird, weil der Vorsprung 432 des einen seitlichen Profilrandes der Aussparung 454 in dem anderen seitlichen Profilrand gegenüberliegt und umgekehrt. Der Vorteil ist, dass bei dieser Form der Formschluss und damit eine erhöhte Zuhaltekraft und eine platzsparendere Gestalt erzielt werden kann, während beide Schenkel im verschlossenen Zustand an dem gerafften Verpackungsmaterial (nicht gezeigt) anliegen, wodurch gleichzeitig eine noch sicherere Abdichtung der Verpackung und Haftung auf dem Zopf gegeben ist.A further embodiment of the clip 400 according to the invention is shown in FIGS. 4A and 4B, which has a cross-sectional profile which is not mirror-symmetrical to the clip plane 422 but point-symmetrical to the center 423 of the profile. A clip with this profile can be closed so that the legs 410, 412 are parallel to each other without height offset, yet a positive connection is achieved because the projection 432 of a side profile edge of the recess 454 in the other side profile edge opposite and vice versa. The advantage is that at this shape of the positive connection and thus an increased clamping force and a space-saving shape can be achieved while both legs in the closed state of the shirred packaging material (not shown) rest, which at the same time an even safer sealing of the packaging and adhesion is given on the braid.

Auch bei der Ausführungsform gemäß Fig. 4 sind die Vorsprünge und Aussparungen mit gleichen Radien versehen, so dass der Formschluss auch bei axial verdrehten Schenkeln gewährleistet ist.Also in the embodiment of FIG. 4, the projections and recesses are provided with the same radii, so that the form-fitting is ensured even with axially twisted legs.

Abschließend sei darauf hingewiesen, dass weder die Anzahl von Vorsprüngen noch die der Ausnehmungen auf die der Ausführungsbeispiele festgelegt ist. Auch ist die Form oder Anordnung (Symmetrie) der Vorsprünge und Ausnehmungen nicht auf die gezeigten Beispiele beschränkt.Finally, it should be noted that neither the number of protrusions nor that of the recesses is fixed to that of the exemplary embodiments. Also, the shape or arrangement (symmetry) of the projections and recesses is not limited to the examples shown.

Claims (7)

  1. A closure clip (200, 300, 400) for closing tubular or bag-like, gathered packaging material, comprising two limbs (110, 112, 210, 212, 310, 312, 410, 412) which define a clip plane (122, 222, 422) and which are connected by a connecting portion (114, 214, 314),
    characterised in that the closure clip is formed from a piece of material having a cross-sectional profile (230) with lateral profile edges which delimit the width of the cross-sectional profile (that is to say the extent of the profile perpendicularly to the plane of the clip) and of which one profile edge has a recess (252, 254, 352, 354, 454) and the other profile edge has a projection (232, 234, 332, 334, 432), wherein the projection and the recess are capable of engaging into each other in the closed condition of the closure clip.
  2. A closure clip (200, 300) according to claim 1 characterised in that both lateral profile edges each have a first projection (232, 234, 332, 334) and a second projection (242, 244, 342, 344) between which the recess (252, 254, 352, 354) is enclosed.
  3. A closure clip (200, 300) according to claim 2 characterised in that the cross-sectional profile (230) is in mirror-image symmetrical relationship with the clip plane (222).
  4. A closure clip (200, 300, 400) according to one of the preceding claims characterised in that the projection (232, 234, 331, 334, 432) has a convex radius and the recess has a concave radius (252, 254, 352, 354, 454) of equal size.
  5. A closure clip (200, 300) according to one of the preceding claims characterised in that at least in the region of the connecting portion (214, 314) an outside surface (270, 370) of the closure clip (200, 300), which is remote from the packaging material, forms transitional edges with the side surfaces (224, 226, 324, 326), which form the lateral profile edges, wherein the transitional edges are of radii which are less than or equal to 0.5 mm.
  6. A closure clip at least according to claim 1 characterised in that an inside surface (260, 360) of the closure clip (200, 300), which is towards the packaging material, has at least one notch in the longitudinal direction of the piece of material.
  7. A closure clip at least according to claim 1 characterised in that the height of the cross-sectional profile (that is to say the extent of the profile in the plane of the clip) is greater than its width (that is to say its profile extent perpendicularly to the plane of the clip).
EP05707227.4A 2004-02-05 2005-02-04 Profile closing clip Expired - Fee Related EP1711411B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410005542 DE102004005542B4 (en) 2004-02-05 2004-02-05 Profile closure clip
PCT/EP2005/001184 WO2005075310A1 (en) 2004-02-05 2005-02-04 Profile closing clip

Publications (3)

Publication Number Publication Date
EP1711411A1 EP1711411A1 (en) 2006-10-18
EP1711411B1 true EP1711411B1 (en) 2007-06-27
EP1711411B2 EP1711411B2 (en) 2015-01-21

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Application Number Title Priority Date Filing Date
EP05707227.4A Expired - Fee Related EP1711411B2 (en) 2004-02-05 2005-02-04 Profile closing clip

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EP (1) EP1711411B2 (en)
DE (2) DE102004005542B4 (en)
ES (1) ES2286791T5 (en)
WO (1) WO2005075310A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005014340U1 (en) * 2005-09-09 2007-02-01 Tipper Tie Technopack Gmbh Closure clip for a packaging tube and device for processing the closing clip
DE102007012776A1 (en) * 2007-03-16 2008-09-18 Poly-Clip System Gmbh & Co Kg Closure clip with round bottom
CN113401412B (en) * 2020-03-17 2022-12-20 内蒙古新特硅材料有限公司 Packaging system and packaging method of polycrystalline silicon

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH256532A (en) * 1946-12-14 1948-08-31 Ag Stoba Bag closure.
US3564663A (en) * 1968-12-31 1971-02-23 Grace W R & Co Clip
US3541647A (en) * 1968-12-31 1970-11-24 James W Marietta Jr Casing clip
US3584347A (en) * 1970-05-27 1971-06-15 Rheem Mfg Co Clipping device
DE20117733U1 (en) * 2001-10-30 2003-03-20 Vermee Frans Gmbh Closure element band

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ES2286791T3 (en) 2007-12-01
DE502005000942D1 (en) 2007-08-09
DE102004005542A1 (en) 2005-09-01
WO2005075310A1 (en) 2005-08-18
EP1711411A1 (en) 2006-10-18
ES2286791T5 (en) 2015-05-04
DE102004005542B4 (en) 2010-07-22
EP1711411B2 (en) 2015-01-21

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