EP1727931A1 - Embossed tufting needle - Google Patents

Embossed tufting needle

Info

Publication number
EP1727931A1
EP1727931A1 EP05715360A EP05715360A EP1727931A1 EP 1727931 A1 EP1727931 A1 EP 1727931A1 EP 05715360 A EP05715360 A EP 05715360A EP 05715360 A EP05715360 A EP 05715360A EP 1727931 A1 EP1727931 A1 EP 1727931A1
Authority
EP
European Patent Office
Prior art keywords
tufting
tufting needle
reference plane
needle
needle according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05715360A
Other languages
German (de)
French (fr)
Other versions
EP1727931B1 (en
Inventor
Bernd Eugen Hillenbrand
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.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Groz Beckert KG filed Critical Groz Beckert KG
Publication of EP1727931A1 publication Critical patent/EP1727931A1/en
Application granted granted Critical
Publication of EP1727931B1 publication Critical patent/EP1727931B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material
    • D05C15/04—Tufting
    • D05C15/08—Tufting machines
    • D05C15/16—Arrangements or devices for manipulating threads
    • D05C15/20—Arrangements or devices, e.g. needles, for inserting loops; Driving mechanisms therefor
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles

Definitions

  • the invention relates to an improved tufting needle
  • Tufting needles are known for example from EP 0 874 932 B1.
  • the tufting needle illustrated in this publication has a base body, the holding end of which is held in a holding body. The other end runs into a tip that is adjacent to an eye.
  • a thread groove extends along the shaft to the eye.
  • a tufting needle is known from US Pat. No. 5,189,966, which has curved bevels on its flanks for a loop gripper. However, it does not have a real groove.
  • the shaft has a cross section in the region of the bevels in the manner of an arc triangle.
  • a tufting needle is known from WO 90/06391, which is provided with a fillet near the eye.
  • the fillet serves to provide a loop gripper or other tools with better access to the thread.
  • the tufting needle is flattened and mechanically weakened.
  • Loop grippers can hit the tufting needle in the area of the groove and reach into the groove across the needle. Over time, the tufting needle will wear as a result of material removal. If this has progressed too far or if a breakthrough to the thread groove is created, the tufting needle must be replaced. This limits the service life.
  • the tufting needle according to the invention has a chamfer provided with at least one chamfer, the chamfer standing more steeply on its edge facing the needle flank than further inside.
  • the gripper strikes the chamfer in an outer region which is at the angle ⁇ , ⁇ lies for example in the range from 35 ° to 50 ° and is preferably 45 °.
  • the needle body can be arranged in the tufting module with an angle of attack. This means that the reference plane of the tufting needle is not oriented at right angles to a contact surface of a needle bar. Such a position, which normally increases the friction between the gripper and the needle, is well tolerated by the needle according to the invention.
  • the needle body is preferably flattened. This applies particularly to the area of the fillet.
  • the section adjoining the fillet can also be flattened. This results in a good needle elasticity in a needle side direction and a high needle stiffness in a side direction perpendicular thereto, which generally corresponds to the material transport direction of the base material.
  • the tufting needle can have a thread groove. If this is not necessary, it can also be omitted if necessary.
  • the fillet is preferably symmetrical with respect to a central plane. This means that it can be used in both right and left orientation.
  • the fillet can be provided with chamfers on both sides to enable the latter.
  • the fillet is in turn preferably oriented symmetrically to the central plane. The way of working in the right orientation and in the left orientation is then the same.
  • the cross section of the needle then has a roof-like shape that is rounded or faceted in the area of the fillet. Despite chamfering on both sides of the fillet, there are large wall thicknesses towards the thread groove.
  • Shaft width can be reached. This comes e.g. the stability of the tufting needle.
  • the symmetrical arrangement of the chamfers can also lead to improved wear behavior of the needle for another reason. It is largely prevented that the gripper scrapes against the edge of the fillet when the thread is laid out on one side during the return stroke of the needle. The risk of sharp edges forming, which could lead to injuries to the carrier material, is reduced. Further details of advantageous refinements and developments of the invention result from the drawing, the description or from claims.
  • FIG. 1 shows a perspective view of a section of a bar and a tufting needle module held thereon with a plurality of tufting needles oriented parallel to one another
  • FIG. 2 shows the module according to FIG. 1 in front view
  • FIG. 3 shows the module according to FIG. 1 in a side view
  • FIG. 4 shows a cross section through a tufting needle in the region of its groove
  • FIG. 5 shows one of the tufting needles of the modules according to FIGS. 2 and 3 in front view
  • Figure 6 shows the tufting needle of Figure 5 in a longitudinal section.
  • a bar 1 with a tufting module 2 held thereon is illustrated schematically in FIG.
  • the tufting module 2 consists of a body 3 in or on which a group of tufting needles 4 is held.
  • the body 3 rests with a 5 flat side on the front side 5 of the bar 1.
  • the tufting needles 4 are aligned parallel downward at a distance.
  • FIGS. 4, 5 and 6 illustrate the tufting module 2 10 separately.
  • the tufting needles 4 are of identical design and flattened with one another. With their upper end they are held in the body 3. As can be seen from FIG. 3, their eyes 6 are aligned, for example, with one another.
  • FIGS. 4, 5 and 6 The structure of a single tufting needle 4 is shown in FIGS. 4, 5 and 6.
  • the tufting needle 4 has a needle body 7 which forms a shaft 9 which extends up to a tip 8.
  • the tip 8 20 marks the center of the shaft 9.
  • a flattened section 13 extends in the direction of the tip 8.
  • a section 14 adjoins the flattened section 13 and is provided with a fillet 15 30.
  • the section 13 is upwards through a Face 16 completed.
  • the fillet 15 approaches the longitudinal axis 11 closer to the flat surface 16. It forms a long, saddle-shaped indentation.
  • the eye 6 is provided in the immediate vicinity of the groove 15. It is surrounded by a flat ring surface 17, which is preferably arranged in one plane with the flat surface 16.
  • a section 18 begins in which the needle body 7 tapers towards the tip 8. As can be seen in particular from FIG.
  • FIG. 4 illustrates the cross section of the tufting needle 4, cut along the line IV-IV shown in FIG. 5. Different representation scales are selected in FIGS. 4 and 5.
  • the thread trough 19 is preferably approximately trapezoidal.
  • Legs 21, 22 adjoin the thread groove 19 on both sides and are delimited on the thread groove side by flat surfaces 23, 24.
  • the flat surfaces 23, 24 form an obtuse angle with one another. They end in edges 25, 26 which are radially clearly outside an outline 27 which the shaft 9 has in the section 12. The legs 21, 22 thus protrude beyond this outline 27.
  • the eye cut away and thus not illustrated has a vertical opening direction.
  • This is perpendicular to a reference plane 28.
  • This is preferably aligned parallel to the flat surface 16.
  • the reference plane 28 extends longitudinally through the tufting needle 4 and thus contains the longitudinal axis 11.
  • a central plane 29 is to be thought that intersects the reference plane 28, the cutting line being the
  • the central plane 29 forms a plane of symmetry for the tufting needle 4.
  • a rounding 31 is provided which merges into surfaces that are straight with respect to the longitudinal direction. These surfaces include a plane surface 32 arranged symmetrically to the central plane 29, which is preferably oriented parallel to the reference plane 28. There are chamfers on both sides of the plane surface 32
  • the chamfers 33, 34 are arranged that intersect the reference plane 28.
  • the chamfers 33, 34 are arranged symmetrically to the central plane 29.
  • the bevels 33, 34 are faceted. Accordingly, they each contain two strip-shaped flat surfaces 35, 36 or 37, 38, which merge into a rounded or curved surface 41, 42.
  • the surface 41 lies between the flat surfaces 35, 36.
  • the surface 42 lies between the flat surfaces 37, 38.
  • the chamfers 33, 34 connect to the flat surface 32 via rounded or curved surfaces 43, 44.
  • the plane surfaces 35, 36 and 37, 38 form an obtuse angle with each other in pairs. As a result, they lie at different angles to the reference plane 28 or a parallel thereto, as is illustrated in FIG. 4.
  • the plane surface 38 includes a pointed ⁇ with a line 45 parallel to the reference surface 28.
  • the flat surface 36 includes an acute angle ⁇ with the line 45.
  • the angle is smaller than the angle ⁇ .
  • the angle ⁇ is preferably in the range from 20 ° to 40 °. In the present preferred embodiment it is 30 °.
  • the angle ⁇ is preferably in the range from 35 ° to 55 °. In the present preferred exemplary embodiment, it is 45 °.
  • the flat surfaces 35, 37 lie at the edges, ie they preferably end in an edge 46, 47 which lies outside the outline 27.
  • the outer flanks 48, 49 of section 14 lie outside the outline 27.
  • the flanks 48, 49 are preferably slightly curved.
  • the tufting needle 4 described so far works as follows:
  • a thread is passed through the thread groove and the eye 6. If the tufting needle 4 now pierces through a base material, the thread is drawn from the eye 6 through the base material, a looper is moved towards the tufting needle 4 in the vicinity of the lower reversal point of the needle 4.
  • the looper is designed like a hook. It first meets the flat surface 37 with its tip. Because of its strong inclination to the reference plane 28 (acute angle ⁇ ), a large distance between the edge 47 and the line 45 is achieved. Regardless of existing misalignments, tolerances, inaccuracies or bends, the tip of the looper thus securely hits the chamfer 34. It then glides along the flat surface 37 and then reaches the flat surface 38.
  • the curvature present in the chamfers 33, 34 leads at 41 and 42, respectively, to an increase in the wall thickness a, b towards the thread groove 19. Ultimately, this not only benefits the rigidity of the tufting needle 4 but also its wear resistance. Gradual removal of the existing wall only leads to unacceptable wear after very long use.
  • a novel tufting needle 4 is characterized by a preferably a center plane 29 formed symmetrically groove 15, which is provided on both sides with chamfers 33, 34.
  • the bevels 33 In an area lying on the inside, ie close to the central plane 29, the bevels 33 have only a small acute angle to a reference plane 28, while in an area lying outside on the edge (edges 46, 47) in one area larger acute angle ß are inclined to the reference plane 28. This improves the rigidity, the tufting properties and the mechanical stability and wear resistance of the new tufting needle 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Finger-Pressure Massage (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Tires In General (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

A novel tufting needle ( 4 ) is distinguished by a hollow flute ( 15 ) which is preferably symmetrical to a central plane ( 29 ) and which is bilaterally provided with chamfers ( 33, 34 ). The chamfers ( 33, 34 ) are, in an inward-located, that is, in a region lying close to the central plane ( 29 ), inclined at a small acute angle (alpha) to a reference plane ( 28 ), while in a region bordering an externally located rim (edges ( 46, 47 )), the chamfers ( 33, 34 ) are inclined at a larger acute angle (beta) to the reference plane ( 28 ). This feature improves the rigidity, the tufting properties and the mechanical strength, as well as the wear resistance of the novel tufting needle ( 4 ).

Description

Geprägte TuftingnadelEmbossed tufting needle
Die Erfindung betrifft eine verbesserte TuftingnadelThe invention relates to an improved tufting needle
Tuftingnadeln sind beispielsweise aus der EP 0 874 932 Bl bekannt. Die in dieser Druckschrift veranschaulichte Tuftingnadel weist einen Grundkörper auf, dessen Halteende in einem Haltekörper gehalten ist. Das andere Ende läuft in einer Spitze auf, der ein Öhr benachbart ist. Längs des Schafts erstreckt sich eine Fadenrinne zu dem Öhr. Aus der US-PS 5,189,966 ist eine Tuftingnadel bekannt, die an ihren Flanken gewölbte Fasen für einen Schiingengreifer aufweist. Jedoch weist sie keine echte Hohlkehle auf. Der Schaft weist im Bereich der Fasen einen Querschnitt nach Art eines Bogendreiecks auf .Tufting needles are known for example from EP 0 874 932 B1. The tufting needle illustrated in this publication has a base body, the holding end of which is held in a holding body. The other end runs into a tip that is adjacent to an eye. A thread groove extends along the shaft to the eye. A tufting needle is known from US Pat. No. 5,189,966, which has curved bevels on its flanks for a loop gripper. However, it does not have a real groove. The shaft has a cross section in the region of the bevels in the manner of an arc triangle.
Des Weiteren ist aus der WO 90/06391 eine Tuftingnadel bekannt, die in der Nähe des Öhrs mit einer Hohlkehle versehen ist . Die Hohlkehle dient dazu, einem Schiingengreifer oder an- deren Werkzeugen einen verbesserten Zugang zu dem Faden zu gewähren. Im Bereich der Hohlkehle ist die Tuftingnadel abgeflacht und mechanisch geschwächt.Furthermore, a tufting needle is known from WO 90/06391, which is provided with a fillet near the eye. The fillet serves to provide a loop gripper or other tools with better access to the thread. In the area of the fillet, the tufting needle is flattened and mechanically weakened.
Schlingengreifer können im Bereich der Hohlkehle auf die Tuftingnadel treffen und quer zu der Nadel in die Hohlkehle greifen. Dabei ergibt sich mit der Zeit ein Verschleiß der Tuftingnadel in Folge von Materialabtrag. Ist dieser zu weit fortgeschritten oder wird gar ein Durchbruch zu der Fadenrinne hin geschaffen, muss die Tuftingnadel ausgetauscht werden. Dies wirkt standzeitbegrenzend.Loop grippers can hit the tufting needle in the area of the groove and reach into the groove across the needle. Over time, the tufting needle will wear as a result of material removal. If this has progressed too far or if a breakthrough to the thread groove is created, the tufting needle must be replaced. This limits the service life.
Bei diesem Vorgang kommt es vor, dass aufgrund von Pro- zessunsicherheiten die Schiingengreifer auf die Flanken der Tuftingnadeln treffen und die Hohlkehle verfehlen.During this process it can happen that due to process uncertainties the loop grippers hit the flanks of the tufting needles and miss the fillet.
Es ist Aufgabe der Erfindung, die Standzeit einer Tuftingnadel zu erhöhen und zugleich den Eintrittsraum in die Hohlkehle zu vergrößern. Diese Aufgabe wird mit der Tuftingnadel gemäß Anspruch 1 gelöst :It is an object of the invention to increase the service life of a tufting needle and at the same time to enlarge the entry space into the groove. This object is achieved with the tufting needle according to claim 1:
Die erfindungsgemäße Tuftingnadel weist eine mit wenigs- tens einer Fase versehene Hohlkehle auf, wobei die Fase an ihrem zur Nadelflanke hin liegenden Rand steiler steht als weiter innen. Mit den Worten des Anspruchs bedeutet dies, dass die Fase in Nähe der Nadelmitte mit der Bezugsebene einen spitzen Winkel α einschließt, der kleiner ist als ein weiter außen liegender spitzer Winkel ß . Dadurch wird der Gleitwinkel zwischen einem etwaigen Greifer und der Fase der Hohlkehle entschärft. Der Greifer trifft auf die Fase in einem äußeren Bereich der unter dem Winkel ß steht, ß liegt beispielsweise im Bereich von 35° bis 50° und beträgt vorzugsweise 45°. Es wird dadurch eine hohe Sicherheit bei der Aufnahme der Fadenschlinge gewährleistet, denn der Eintrittsraum des Greifers in den Hohlkehlbereich wird vergrößert. Das Auftreffen des Greifers auf die Flanken der Nadel wird nahezu vermieden. Nach innen zu fällt der Winkel der Fase auf einen kleineren Wert zwi- sehen 20° und 40°, vorzugsweise 30°, hin ab. Dadurch wird die Reibung zwischen dem Greifer und der Hohlkehle reduziert, was zu einem verminderten Greiferverschleiß und zu einem verminderten Verschleiß der Tuftingnadel führt . Durch die aus Radialrichtung zu sehende konvexe Wölbung oder Ausbildung der Fase der Hohlkehle wird die Dicke der Wandung zwischen der Fase und der Fadenrinne in Vergleich zu ebenen Fasen erhöht. Dadurch wird die Standzeit der Tuftingnadel bis zu einem möglichen Durchbruch des Greifers in die Hohlkeh- le erhöht. Beide Faktoren nämlich die reduzierte Reibung zwi- sehen der Nadel und dem Greifer sowie die dickere Wandung zwischen der Fadenrinne und der Fase ergeben jeweils für sich sowie zusammengenommen eine signifikante Steigerung der Nadel- Standzeit .The tufting needle according to the invention has a chamfer provided with at least one chamfer, the chamfer standing more steeply on its edge facing the needle flank than further inside. In the words of the claim, this means that the chamfer in the vicinity of the center of the needle with the reference plane includes an acute angle α, which is smaller than an acute angle β located further out. As a result, the sliding angle between a possible gripper and the chamfer of the fillet is defused. The gripper strikes the chamfer in an outer region which is at the angle β, β lies for example in the range from 35 ° to 50 ° and is preferably 45 °. This ensures a high level of safety when picking up the thread loop, because the gripper's entry space into the fillet area is enlarged. The impact of the hook on the flanks of the needle is almost avoided. Towards the inside the angle of the chamfer drops to a smaller value between 20 ° and 40 °, preferably 30 °. This reduces the friction between the gripper and the fillet, which leads to reduced gripper wear and reduced wear on the tufting needle. Due to the convex curvature or formation of the chamfer of the fillet, which can be seen from the radial direction, the thickness of the wall between the chamfer and the thread groove is increased in comparison to flat chamfers. This increases the service life of the tufting needle until the gripper breaks through into the hollow groove. Both factors namely the reduced friction between see the needle and the looper and the thicker wall between the thread groove and the chamfer each result in a significant increase in the needle service life, both individually and together.
Der Nadelkörper kann in dem Tuftingmodul mit einem Anstellwinkel angeordnet werden. Das bedeutet, dass die Bezugs- ebene der Tuftingnadel nicht rechtwinklig zu einer Anlagefläche einer Nadelbarre orientiert ist. Eine solche Anstellung, die normalerweise die Reibung zwischen dem Greifer und der Nadel erhöht, wird von der erfindungsgemäßen Nadel gut vertragen.The needle body can be arranged in the tufting module with an angle of attack. This means that the reference plane of the tufting needle is not oriented at right angles to a contact surface of a needle bar. Such a position, which normally increases the friction between the gripper and the needle, is well tolerated by the needle according to the invention.
Der Nadelkörper ist vorzugsweise abgeflacht ausgebildet. Dies gilt insbesondere für den Bereich der Hohlkehle. Auch der sich an die Hohlkehle anschließende Abschnitt kann abgeflacht ausgebildet sein. Dies ergibt eine gute Nadelelastizität in einer Nadelseitenrichtung und eine hohe Nadelsteifigkeit in einer dazu rechtwinkligen Seitenrichtung, die in der Regel mit der Materialtransportrichtung des Grundmaterials übereinstimmt .The needle body is preferably flattened. This applies particularly to the area of the fillet. The section adjoining the fillet can also be flattened. This results in a good needle elasticity in a needle side direction and a high needle stiffness in a side direction perpendicular thereto, which generally corresponds to the material transport direction of the base material.
Die Tuftingnadel kann eine Fadenrinne aufweisen. Falls diese nicht erforderlich ist, kann sie bedarfsweise auch weg gelassen werden.The tufting needle can have a thread groove. If this is not necessary, it can also be omitted if necessary.
Die Hohlkehle ist vorzugsweise bezüglich einer Mittelebene symmetrisch ausgebildet. Damit kann sie sowohl in rechter als auch in linker Orientierung verwendet werden. Insbesondere kann die Hohlkehle beidseitig mit Fasen versehen sein, um Letzteres zu ermöglichen. Dabei ist die Hohlkehle vorzugsweise wiederum symmetrisch zu der Mittelebene o- rientiert. Die Arbeitsweise in rechter Orientierung und in linker Orientierung ist dann jeweils gleich. Der Querschnitt der Nadel weist dann im Bereich der Hohlkehle eine nach oben hin gerundete oder facettierte dachartige Form auf . Es ergeben sich trotz beidseitiger Anfasung der Hohlkehle große Wandstärken zu der Fadenrinne hin.The fillet is preferably symmetrical with respect to a central plane. This means that it can be used in both right and left orientation. In particular, the fillet can be provided with chamfers on both sides to enable the latter. In this case, the fillet is in turn preferably oriented symmetrically to the central plane. The way of working in the right orientation and in the left orientation is then the same. The cross section of the needle then has a roof-like shape that is rounded or faceted in the area of the fillet. Despite chamfering on both sides of the fillet, there are large wall thicknesses towards the thread groove.
Es ist sowohl möglich, die Fase zu facettieren, wobei die einzelnen Facetten in großzügiger Rundung aneinander anschließen können. Es ist auch möglich, die Hohlkehle insgesamt gerundet auszubilden. In letzterem Fall bildet sie somit eine lang gestreckte Sattelfläche. Die genannten Abflachungen und Facetten können an der Tuftingnadel durch Prägen hergestellt werden. Die so erzeugten abgeflachten Bereiche können seitlich über den nicht geprägten sonstigen Schaft hinaus stehen. Dabei kann ein Überstand der äußeren Kanten der Fadenrinne im Be- reich der Hohlkehle zwischen ungefähr 5 % und 20 % derIt is both possible to facet the chamfer, whereby the individual facets can connect to each other in a generous rounding. It is also possible to make the fillet rounded as a whole. In the latter case, it forms an elongated saddle surface. The flattening and facets mentioned can be created on the tufting needle by embossing. The flattened areas produced in this way can protrude laterally beyond the non-embossed other shaft. A protrusion of the outer edges of the thread channel in the area of the fillet can be between approximately 5% and 20% of the
Schaftbreite erreicht werden. Dies kommt z.B. der Stabilität der Tuftingnadel zugute.Shaft width can be reached. This comes e.g. the stability of the tufting needle.
Die symmetrische Anordnung der Fasen kann außerdem aus einem weiteren Grund zu einem verbesserten Verschleißverhalten der Nadel führen. Es wird weitgehend verhindert, dass der Greifer bei einseitiger Fadenauslegung während des Rückhubs der Nadel an der Kante der Hohlkehle schabt . Die Gefahr der Ausbildung scharfer Kanten, die zu Verletzungen des Trägerma- terials führen könnten, wird reduziert. Weitere Einzelheiten vorteilhafter Aus- und Weiterbildungen der Erfindung ergeben sich aus der Zeichnung, der Beschreibung oder aus Ansprüchen.The symmetrical arrangement of the chamfers can also lead to improved wear behavior of the needle for another reason. It is largely prevented that the gripper scrapes against the edge of the fillet when the thread is laid out on one side during the return stroke of the needle. The risk of sharp edges forming, which could lead to injuries to the carrier material, is reduced. Further details of advantageous refinements and developments of the invention result from the drawing, the description or from claims.
In der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Tuftingnadel veranschaulicht. Es zeigen:An exemplary embodiment of the tufting needle according to the invention is illustrated in the drawing. Show it:
Figur 1 einen Ausschnitt aus einer Barre und einem an dieser gehaltenen Tuftingnadelmodul mit mehreren parallel zueinander orientierten Tuftingnadeln in perspektivischer Darstellung,1 shows a perspective view of a section of a bar and a tufting needle module held thereon with a plurality of tufting needles oriented parallel to one another,
Figur 2 das Modul nach Figur 1 in Vorderansicht,FIG. 2 shows the module according to FIG. 1 in front view,
Figur 3 das Modul nach Figur 1 in Seitenansicht,FIG. 3 shows the module according to FIG. 1 in a side view,
Figur 4 einen Querschnitt durch eine Tuftingnadel im Bereich ihrer Hohlkehle,FIG. 4 shows a cross section through a tufting needle in the region of its groove,
Figur 5 eine der Tuftingnadeln der Module nach Figur 2 und 3 in Vorderansicht und5 shows one of the tufting needles of the modules according to FIGS. 2 and 3 in front view and
Figur 6 die Tuftingnadel nach Figur 5 in längs geschnittener Darstellung. Figure 6 shows the tufting needle of Figure 5 in a longitudinal section.
In Figur 1 ist schematisiert eine Barre 1 mit einem daran gehaltenen Tuftingmodul 2 veranschaulicht. Das Tuftingmodul 2 besteht aus einem Körper 3 in oder an dem eine Gruppe von Tuf- tingnadeln 4 gehalten ist. Der Körper 3 liegt dabei mit einer 5 Flachseite an der Vorderseite 5 der Barre 1 an. Die Tuftingnadeln 4 sind im Abstand parallel zueinander nach unten ausgerichtet .A bar 1 with a tufting module 2 held thereon is illustrated schematically in FIG. The tufting module 2 consists of a body 3 in or on which a group of tufting needles 4 is held. The body 3 rests with a 5 flat side on the front side 5 of the bar 1. The tufting needles 4 are aligned parallel downward at a distance.
Die Figuren 2 und 3 veranschaulichen das Tuftingmodul 2 10 gesondert. Wie aus Figur 2 hervorgeht, sind die Tuftingnadeln 4 untereinander gleich ausgebildet und abgeflacht. Mit ihrem oberen Ende sind sie in dem Körper 3 gehalten. Ihre Öhre 6 sind, wie aus Figur 3 hervorgeht, beispielsweise miteinander fluchtend ausgerichtet. [5 Der Aufbau einer einzelnen Tuftingnadel 4 geht aus den Figuren 4, 5 und 6 hervor. Wie Figur 6 veranschaulicht, weist die Tuftingnadel 4 einen Nadelkörper 7 auf, der einen sich bis zu einer Spitze 8 erstreckenden Schaft 9 bildet. Die Spitze 8 20 markiert die Mitte des Schafts 9. Eine die Längsrichtung des Nadelkörpers 7 und des Schafts 9 bestimmende Längsachse 11 führt durch die Spitze 8.Figures 2 and 3 illustrate the tufting module 2 10 separately. As can be seen from FIG. 2, the tufting needles 4 are of identical design and flattened with one another. With their upper end they are held in the body 3. As can be seen from FIG. 3, their eyes 6 are aligned, for example, with one another. [5 The structure of a single tufting needle 4 is shown in FIGS. 4, 5 and 6. As illustrated in FIG. 6, the tufting needle 4 has a needle body 7 which forms a shaft 9 which extends up to a tip 8. The tip 8 20 marks the center of the shaft 9. A longitudinal axis 11, which determines the longitudinal direction of the needle body 7 and the shaft 9, leads through the tip 8.
Ausgehend von einem ersten Abschnitt 12 der auch als Ein- 25 spannabschnitt angesehen werden kann und der einen im Wesentlichen kreisförmigen oder wenigstens abgerundeten Querschnitt aufweist, erstreckt sich ein abgeflachter Abschnitt 13 in Richtung auf die Spitze 8 zu. An den abgeflachten Abschnitt 13 schließt sich ein Abschnitt 14 an, der mit einer Hohlkehle 15 30 versehen ist . Der Abschnitt 13 ist nach oben hin durch eine Planfläche 16 abgeschlossen. Die Hohlkehle 15 nähert sich gegenüber der Planfläche 16 näher an die Längsachse 11 an. Sie bildet dabei eine lang gezogene sattelförmige Einbuchtung. In unmittelbarer Nachbarschaft zu der Hohlkehle 15 ist das Öhr 6 vorgesehen. Es wird von einer planen Ringfläche 17 umgeben, die vorzugsweise in einer Ebene mit der Planfläche 16 angeordnet ist. Ausgehend von der Ringfläche 17 beginnt ein Abschnitt 18 in dem sich der Nadelkörper 7 zu der Spitze 8 hin verjüngt. Wie insbesondere aus Figur 6 ersichtlich ist, ist an der der Planfläche 16 gegenüber liegenden Seite der Tuftingnadel 4 eine Fadenrinne 19 ausgebildet, die sich über die Abschnitte 13, 14 hinweg bis in das Öhr 6 hinein erstreckt. Der Querschnitt der Fadenrinne 19 ist über deren gesamte Länge hinweg im Wesentlichen konstant. Figur 4 veranschaulicht den Querschnitt der Tuftingnadel 4, geschnitten entlang der in Figur 5 eingetragenen Linie IV-IV. In den Figuren 4 und 5 sind unterschiedliche Darstellungsmaßstäbe gewählt. Wie Figur 4 zeigt, ist die Fadenrinne 19 vorzugsweise etwa trapezförmig ausgebil- det . An die Fadenrinne 19 schließen sich beidseitig Schenkel 21, 22 an, die an der Fadenrinnenseite durch Planflächen 23, 24 begrenzt sind. Die Planflächen 23, 24 schließen miteinander einen stumpfen Winkel ein. Sie enden in Kanten 25, 26, die radial deutlich außerhalb eines Umrisses 27 liegen, den der Schaft 9 in dem Abschnitt 12 hat. Somit ragen die Schenkel 21, 22 über diesen Umriss 27 hinaus.Starting from a first section 12, which can also be regarded as a clamping section and which has an essentially circular or at least rounded cross section, a flattened section 13 extends in the direction of the tip 8. A section 14 adjoins the flattened section 13 and is provided with a fillet 15 30. The section 13 is upwards through a Face 16 completed. The fillet 15 approaches the longitudinal axis 11 closer to the flat surface 16. It forms a long, saddle-shaped indentation. The eye 6 is provided in the immediate vicinity of the groove 15. It is surrounded by a flat ring surface 17, which is preferably arranged in one plane with the flat surface 16. Starting from the annular surface 17, a section 18 begins in which the needle body 7 tapers towards the tip 8. As can be seen in particular from FIG. 6, a thread groove 19 is formed on the side of the tufting needle 4 opposite the flat surface 16, which extends over the sections 13, 14 into the eye 6. The cross section of the thread groove 19 is essentially constant over its entire length. FIG. 4 illustrates the cross section of the tufting needle 4, cut along the line IV-IV shown in FIG. 5. Different representation scales are selected in FIGS. 4 and 5. As FIG. 4 shows, the thread trough 19 is preferably approximately trapezoidal. Legs 21, 22 adjoin the thread groove 19 on both sides and are delimited on the thread groove side by flat surfaces 23, 24. The flat surfaces 23, 24 form an obtuse angle with one another. They end in edges 25, 26 which are radially clearly outside an outline 27 which the shaft 9 has in the section 12. The legs 21, 22 thus protrude beyond this outline 27.
In der Darstellung gemäß Figur 4 weist das weg geschnittene und somit nicht veranschaulichte Öhr eine vertikale Öff- nungsrichtung auf. Diese steht senkrecht auf einer Bezugsebene 28. Diese ist vorzugsweise parallel zu der Planfläche 16 ausgerichtet. Die Bezugsebene 28 erstreckt sich längs durch die Tuftingnadel 4 und enthält somit die Längsachse 11. Senkrecht zu der Bezugsebene 28 ist eine Mittelebene 29 zu denken, die die Bezugsebene 28 schneidet, wobei die Schnittlinie dieIn the illustration according to FIG. 4, the eye cut away and thus not illustrated has a vertical opening direction. This is perpendicular to a reference plane 28. This is preferably aligned parallel to the flat surface 16. The reference plane 28 extends longitudinally through the tufting needle 4 and thus contains the longitudinal axis 11. Perpendicular to the reference plane 28, a central plane 29 is to be thought that intersects the reference plane 28, the cutting line being the
Längsachse 11 ist. Die Mittelebene 29 bildet eine Symmetrieebene für die Tuftingnadel 4.Longitudinal axis 11. The central plane 29 forms a plane of symmetry for the tufting needle 4.
Aus Figur 4 geht insbesondere die Form der Hohlkehle 15 hervor. Ausgehend von einer die Planfläche 16 begrenzenden Kante ist eine Rundung 31 vorgesehen, die in bezüglich der Längsrichtung gerade Flächen übergeht. Zu diesen Flächen gehören eine symmetrisch zu der Mittelebene 29 angeordnete Planfläche 32, die vorzugsweise parallel zu der Bezugsebene 28 o- rientiert ist. Zu beiden Seiten der Planfläche 32 sind Fasen4 shows in particular the shape of the fillet 15. Starting from an edge delimiting the flat surface 16, a rounding 31 is provided which merges into surfaces that are straight with respect to the longitudinal direction. These surfaces include a plane surface 32 arranged symmetrically to the central plane 29, which is preferably oriented parallel to the reference plane 28. There are chamfers on both sides of the plane surface 32
33, 34 angeordnet, die die Bezugsebene 28 schneiden. Die Fasen 33, 34 sind symmetrisch zu der Mittelebene 29 angeordnet. Im vorliegenden Ausführungsbeispiel sind die Fasen 33, 34 facettiert. Dementsprechend enthalten sie jeweils zwei streifenför- mige Planflächen 35, 36 bzw. 37, 38, die in eine gerundete o- der gewölbte Fläche 41, 42 übergehen. Die Fläche 41 liegt zwischen den Planflächen 35, 36. Die Fläche 42 liegt zwischen den Planflächen 37, 38. Außerdem schließen die Fasen 33, 34 über gerundete oder gewölbte Flächen 43, 44 an die Planfläche 32 an. Die Planflächen 35, 36 sowie 37, 38 schließen miteinander paarweise jeweils einen stumpfen Winkel ein. Dadurch liegen sich in unterschiedlichen Winkeln zu der Bezugsebene 28 oder einer Parallelen dazu, wie es in Figur 4 veranschaulicht ist. Die Planfläche 38 schließt mit einer zu der Bezugsfläche 28 parallelen Linie 45 einen spitzen α ein. Gleiches gilt für die Planfläche 36. Die Planfläche 37 schließt mit der Linie 45 einen spitzen Winkel ß ein. Gleiches gilt für die Planfläche 35. Der Winkel ist kleiner als der Winkel ß. Vorzugsweise liegt der Winkel α im Bereich von 20° bis 40°. Im vorliegenden be- vorzugten Ausführungsbeispiel beträgt er 30°. Der Winkel ß liegt vorzugsweise in dem Bereich von 35° bis 55°. Im vorliegenden bevorzugten Ausführungsbeispiel beträgt er 45° . Die Planflächen 35, 37 liegen randständig, d.h. sie enden vorzugsweise in einer Kante 46, 47, die außerhalb des Umrisses 27 liegt. Somit liegen die äußeren Flanken 48, 49 des Abschnitts 14 außerhalb des Umrisses 27. Die Flanken 48, 49 sind vorzugsweise leicht gewölbt.33, 34 arranged that intersect the reference plane 28. The chamfers 33, 34 are arranged symmetrically to the central plane 29. In the present exemplary embodiment, the bevels 33, 34 are faceted. Accordingly, they each contain two strip-shaped flat surfaces 35, 36 or 37, 38, which merge into a rounded or curved surface 41, 42. The surface 41 lies between the flat surfaces 35, 36. The surface 42 lies between the flat surfaces 37, 38. In addition, the chamfers 33, 34 connect to the flat surface 32 via rounded or curved surfaces 43, 44. The plane surfaces 35, 36 and 37, 38 form an obtuse angle with each other in pairs. As a result, they lie at different angles to the reference plane 28 or a parallel thereto, as is illustrated in FIG. 4. The plane surface 38 includes a pointed α with a line 45 parallel to the reference surface 28. The same applies to the Flat surface 36. The flat surface 37 includes an acute angle β with the line 45. The same applies to the flat surface 35. The angle is smaller than the angle β. The angle α is preferably in the range from 20 ° to 40 °. In the present preferred embodiment it is 30 °. The angle β is preferably in the range from 35 ° to 55 °. In the present preferred exemplary embodiment, it is 45 °. The flat surfaces 35, 37 lie at the edges, ie they preferably end in an edge 46, 47 which lies outside the outline 27. Thus, the outer flanks 48, 49 of section 14 lie outside the outline 27. The flanks 48, 49 are preferably slightly curved.
Die insoweit beschriebene Tuftingnadel 4 arbeitet wie folgt:The tufting needle 4 described so far works as follows:
Im Einsatz ist ein Faden durch die Fadenrinne und das Öhr 6 geführt. Sticht die Tuftingnadel 4 nun durch ein Grundmaterial wird der Faden von dem Öhr 6 durch das Grundmaterial ge- zogen, in der Nähe des unteren Umkehrpunktes der Nadel 4 wird ein Schlingengreifer (Looper) auf die Tuftingnadel 4 zu bewegt. Der Looper ist hakenartig ausgebildet. Mit seiner Spitze trifft er zunächst auf die Planfläche 37. Aufgrund deren starker Neigung zu der Bezugsebene 28 (spitzer Winkel ß) wird ein großer Abstand zwischen der Kante 47 und der Linie 45 erreicht. Unabhängig von vorhandenen Dejustagen, Toleranzen, Un- genauigkeiten oder Verbiegungen trifft die Spitze des Loopers somit sicher auf die Fase 34. Er gleitet dann zunächst an der Planfläche 37 entlang und erreicht dann die Planfläche 38. Durch deren geringeren Anstellwinkel (kleinerer spitzer Winkel α) zu der Bezugsebene 28 wird die Reibung vermindert. Der Looper wird dann auf die Planfläche 32 und darüber hinweg übergeleitet, so dass er während des Nadelrückhubs den zunächst mittels des Öhrs durch das Trägermaterial gestochenen Faden fest- halten kann.In use, a thread is passed through the thread groove and the eye 6. If the tufting needle 4 now pierces through a base material, the thread is drawn from the eye 6 through the base material, a looper is moved towards the tufting needle 4 in the vicinity of the lower reversal point of the needle 4. The looper is designed like a hook. It first meets the flat surface 37 with its tip. Because of its strong inclination to the reference plane 28 (acute angle β), a large distance between the edge 47 and the line 45 is achieved. Regardless of existing misalignments, tolerances, inaccuracies or bends, the tip of the looper thus securely hits the chamfer 34. It then glides along the flat surface 37 and then reaches the flat surface 38. Due to its smaller angle of attack (smaller acute angle α) to the reference plane 28, the friction is reduced. The looper is then transferred to the flat surface 32 and beyond, so that it can hold the thread, which was initially pierced through the carrier material by means of the eye, during the needle return stroke.
Die in den Fasen 33, 34 vorhandene Wölbung führt bei 41 bzw. 42 zu einer Vergrößerung der Wandstärke a, b zu der Fadenrinne 19 hin. Letztendlich kommt dies nicht nur der Stei- figkeit der Tuftingnadel 4 sondern auch deren Verschleißfestigkeit zugute. Allmählicher Abtrag der vorhandenen Wand führt erst nach sehr langem Gebrauch zu unzuträglichem Verschleiß.The curvature present in the chamfers 33, 34 leads at 41 and 42, respectively, to an increase in the wall thickness a, b towards the thread groove 19. Ultimately, this not only benefits the rigidity of the tufting needle 4 but also its wear resistance. Gradual removal of the existing wall only leads to unacceptable wear after very long use.
Eine neuartige Tuftingnadel 4 zeichnet sich durch eine vorzugsweise bzgl . einer Mittelebene 29 symmetrisch ausgebildete Hohlkehle 15 aus, die an beiden Seiten mit Fasen 33, 34 versehen ist. Die Fasen 33, 34 weisen in einem innen liegenden, d.h. nahe bei der Mittelebene 29 liegenden, Bereich einen lediglich geringen spitzen Winkel zu einer Bezugsebene 28 auf, während sie in einem außen liegenden an den Rand (Kanten 46, 47) grenzenden Bereich in einem größeren spitzen Winkel ß gegen die Bezugsebene 28 geneigt sind. Dies verbessert die Steifigkeit, die Tuftingeigenschaften und die mechanische Standfestigkeit sowie Verschleißfestigkeit der neuen Tuf- tingnadel 4. A novel tufting needle 4 is characterized by a preferably a center plane 29 formed symmetrically groove 15, which is provided on both sides with chamfers 33, 34. In an area lying on the inside, ie close to the central plane 29, the bevels 33 have only a small acute angle to a reference plane 28, while in an area lying outside on the edge (edges 46, 47) in one area larger acute angle ß are inclined to the reference plane 28. This improves the rigidity, the tufting properties and the mechanical stability and wear resistance of the new tufting needle 4.
Bezugszeichenliste :Reference symbol list:
1 Barre1 bar
2 Tuftingmodul2 tufting module
3 Körper 4 Tuftingnadel 5 Vorderseite 6 Öhr 7 Nadelkörper3 body 4 tufting needle 5 front 6 eye 7 needle body
8 Spitze 9 Schaft8 point 9 shaft
11 Längsachse11 longitudinal axis
12, 13, 14 Abschnitt12, 13, 14 section
15 Hohlkehle15 fillet
16 Planfläche 17 Ringfläche 18 Abschnitt 19 Fadenrinne16 flat surface 17 ring surface 18 section 19 thread channel
21, 22 Schenkel21, 22 legs
23, 24 Planflächen23, 24 flat surfaces
25, 26 Kanten25, 26 edges
27 Umriss27 outline
28 Bezugsebene28 reference plane
29 Mittelebene, Nadelmitte29 middle plane, center of needle
31 Rundung 32 Planfläche31 rounding 32 flat surface
33, 34 Fasen33, 34 chamfers
35, 36; 37, 38 Planflächen35, 36; 37, 38 flat surfaces
41, 42; 43, 44 Fläche41, 42; 43, 44 area
45 Linie , 47 Kante, 49 Flanken 45 line , 47 edge, 49 flanks

Claims

Ansprüche : Expectations :
1. Tuftingnadel (4) mit einem Nadelkörper (7) , der einen endseitig in einer Spitze (8) auslaufenden Schaft (9) aufweist, der mit einem Öhr (6) und in dessen Nachbarschaft mit einer Hohlkehle (15) versehen ist, wobei die Öffnungsrichtung des Öhrs (6) senkrecht zu einer Bezugsebene (28) steht, wobei die Hohlkehle (15) mit wenigstens einer Fase (33, 34) versehen ist, die schräg zu der Bezugsebene (28) angeordnet ist und in der Nähe der Nadelmitte (29) mit der Bezugsebene (28) einen spitzen Winkel (α) einschließt, der kleiner ist als ein Winkel (ß) , den die Fase (33, 34) in größerer seitlicher Entfernung zu der Nadelmitte (29) mit der Bezugsebene (28) einschließt.1. tufting needle (4) with a needle body (7), which has an end in a tip (8) tapered shaft (9), which is provided with an eye (6) and in the vicinity of a groove (15), wherein the opening direction of the eye (6) is perpendicular to a reference plane (28), the groove (15) being provided with at least one chamfer (33, 34) which is arranged obliquely to the reference plane (28) and in the vicinity of the center of the needle (29) forms an acute angle (α) with the reference plane (28) which is smaller than an angle (β) which the chamfer (33, 34) has at a greater lateral distance to the center of the needle (29) with the reference plane (28 ) includes.
2. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass der Nadelkörper (7) abgeflacht ausgebildet ist.2. Tufting needle according to claim 1, characterized in that the needle body (7) is flattened.
3. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass der Nadelkörper (7) an der von der Hohlkehle (15) abgewandten Seite mit einer Fadenrinne (19) versehen ist.3. Tufting needle according to claim 1, characterized in that the needle body (7) on the side facing away from the groove (15) is provided with a thread groove (19).
Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass die Hohlkehle (15) die Form einer langgestreckten Sattelfläche aufweist. Tufting needle according to claim 1, characterized in that the fillet (15) has the shape of an elongated saddle surface.
5. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass sie bezüglich einer senkrecht auf der Bezugsebene (28) stehenden und in Nadellängsrichtung (11) orientierten Mittelebene (29) symmetrisch ausgebildet ist.5. tufting needle according to claim 1, characterized in that it is symmetrical with respect to a perpendicular to the reference plane (28) and in the longitudinal direction (11) oriented center plane (29).
6. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass die Hohlkehle (15) beidseitig mit Fasen (33, 34) versehen ist.6. tufting needle according to claim 1, characterized in that the fillet (15) is provided on both sides with chamfers (33, 34).
7. Tuftingnadel nach Anspruch 6, dadurch gekennzeichnet, dass die Fasen (33, 34) bezüglich einer senkrecht auf der Bezugsebene (28) stehenden und in Nadellängsrichtung (11) orientierten Mittelebene (29) symmetrisch ausgebildet sind.7. Tufting needle according to claim 6, characterized in that the chamfers (33, 34) are symmetrical with respect to a central plane (29) which is perpendicular to the reference plane (28) and oriented in the longitudinal direction of the needle (11).
8. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass sich die Fase (33, 34) über die gesamte Länge der Hohlkehle (15) erstreckt.8. tufting needle according to claim 1, characterized in that the chamfer (33, 34) extends over the entire length of the fillet (15).
9. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass die Fase (33, 34) wenigstens zwei Facettenfläche (35, 36; 37, 38) aufweist, die mit der Bezugsebene (28) jeweils unterschiedliche Winkel (et , ß) einschließen.9. tufting needle according to claim 1, characterized in that the chamfer (33, 34) has at least two facet surfaces (35, 36; 37, 38) which each include different angles (et, ß) with the reference plane (28).
10. Tuftingnadel nach Anspruch 9, dadurch gekennzeichnet, dass die Facetten (35, 36; 37, 38) in eine gerundete Fläche (41, 42) übergehen. 10. tufting needle according to claim 9, characterized in that the facets (35, 36; 37, 38) merge into a rounded surface (41, 42).
11. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass die Fase (33, 34) durch eine gewölbte Fläche (41, 42) gebildet ist.11. Tufting needle according to claim 1, characterized in that the chamfer (33, 34) is formed by a curved surface (41, 42).
12. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass der Schaft (9) im Bereich der Hohlkehle (15) gegenüber seiner sonstigen Breite verbreitert ist.12. tufting needle according to claim 1, characterized in that the shaft (9) in the region of the groove (15) is widened compared to its other width.
13. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass in der Hohlkehle (15) zwischen den Fasen (33, 34) eine Planfläche (32) vorgesehen ist, die gegen benachbarte Flächen (16, 17) vertieft ist.13. Tufting needle according to claim 1, characterized in that in the groove (15) between the chamfers (33, 34) a flat surface (32) is provided which is recessed against adjacent surfaces (16, 17).
14. Tuftingnadel nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnungsrichtung des Öhrs (6) senkrecht auf der Bezugsebene (28) steht und dass die Einbuchtung parallel zu der Bezugsebene (28) ausgerichtet ist. 14. Tufting needle according to claim 1, characterized in that the opening direction of the eye (6) is perpendicular to the reference plane (28) and that the indentation is aligned parallel to the reference plane (28).
EP05715360A 2004-03-20 2005-02-17 Embossed tufting needle Active EP1727931B1 (en)

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DE202004004401U DE202004004401U1 (en) 2004-03-20 2004-03-20 Embossed tufting needle
PCT/EP2005/001585 WO2005095703A1 (en) 2004-03-20 2005-02-17 Embossed tufting needle

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JP (1) JP4436411B2 (en)
KR (1) KR100790674B1 (en)
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WO2005095703A1 (en) 2005-10-13
CN1946893B (en) 2010-06-16
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EP1727931B1 (en) 2008-06-04
US7328664B2 (en) 2008-02-12
JP4436411B2 (en) 2010-03-24
KR100790674B1 (en) 2008-01-02
KR20070024494A (en) 2007-03-02
DE502005004344D1 (en) 2008-07-17
ATE397688T1 (en) 2008-06-15
US20070193487A1 (en) 2007-08-23
DE202004004401U1 (en) 2004-05-19
JP2007529639A (en) 2007-10-25

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