EP0464378B1 - Yarn delivering device - Google Patents

Yarn delivering device Download PDF

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Publication number
EP0464378B1
EP0464378B1 EP91108994A EP91108994A EP0464378B1 EP 0464378 B1 EP0464378 B1 EP 0464378B1 EP 91108994 A EP91108994 A EP 91108994A EP 91108994 A EP91108994 A EP 91108994A EP 0464378 B1 EP0464378 B1 EP 0464378B1
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EP
European Patent Office
Prior art keywords
drum
thread
delivery device
yarn
drums
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91108994A
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German (de)
French (fr)
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EP0464378A2 (en
EP0464378A3 (en
Inventor
Alberto Gustavo Sarfati
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.)
Sobrevin Societe de Brevets Industriels
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Sobrevin Societe de Brevets Industriels
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Publication date
Priority claimed from DE4021461A external-priority patent/DE4021461A1/en
Application filed by Sobrevin Societe de Brevets Industriels filed Critical Sobrevin Societe de Brevets Industriels
Publication of EP0464378A2 publication Critical patent/EP0464378A2/en
Publication of EP0464378A3 publication Critical patent/EP0464378A3/en
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Publication of EP0464378B1 publication Critical patent/EP0464378B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a delivery device for running threads, in particular for feeding the same to thread-processing machines, such as for example for feeding the weft thread into a weaving machine, in which device the thread is fed tangentially to a drum connected to a rotary drive and again by a pulling force acting beyond the drum this is removed, with the thread only wrapping around a partial circumference of the drum rotating at a higher peripheral speed than the thread take-off speed, and can be brought into slipping along with the drum jacket surface via the pull-off force tangential to the drum, with at least two drums which are adjacent to one another and being axially parallel are subdivided by stationary partition walls that each of the drums forms a plurality of regions lying one behind the other in the drum axis direction for partial wrap through the thread such that the thread extends from the region of one drum to the region de r passes over to another drum.
  • An advantage of the known delivery device is that, while avoiding the stop-and-go mode of operation of the drum, a minimization of the thread take-off tension is achieved and that even with difficultly designed threads, multiple wraps on the drums are possible while largely preventing thread layers from overlapping.
  • the object of the invention is based on the object of developing a delivery device of the type in question in such a way that an optimization with regard to the mode of operation is achieved.
  • the object of the invention is achieved in that the drum jacket surface, in alignment with the plane of the intermediate walls, has a radially outwardly directed annular collar.
  • a delivery device type which is characterized by an optimal mode of operation.
  • Both the partitions and the ring collar of the drum jacket surface which are flush with them prevent with certainty that in the event of multiple wrapping of the drums, adjacent layers of thread can step over one another. Faults in thread take-off resulting therefrom are accordingly eliminated.
  • the height of the ring collar corresponds at least the thread thickness. A height of a few millimeters is preferably selected so that a wide variety of yarns can be processed with a single delivery device. If one leaves an annular gap between the ring collar and the intermediate wall, the size of which also corresponds at least approximately to the thread size, it is also avoided that thread material can get caught there. This further supports the optimal functioning of the delivery device.
  • the air baffle bar which is approximately radially oriented on the drum jacket surface, is also provided. This extends in the circumferential direction just behind the tangent point between the thread and the drum surface.
  • the air baffle creates an air flow that is directed away from the drum and accordingly presses against the thread layers in a way. This prevents the thread from being sucked into the gusset of the drums and from being wound onto one or the other drum.
  • the ring collars support the above-mentioned effect in that the air flow does not emerge sideways on the drums, but acts specifically on the thread layers. Fluidic and structural advantages result from providing the air baffle bar on an arm which can be pivoted towards the center of the drum.
  • the arrangement of two diametrically opposed arms with air baffle bars ensures that yarn material cannot be sucked into either the upper or lower gusset formed by the drums.
  • the thread delivery device has a support column 40 in which a drum drive, not shown, is accommodated. Via a drive belt 41, pulleys 42, 43 are rotated in the same direction, which pulleys are firmly connected to a drum 44, 45. With regard to the drums 44, 45, these are free-floating circular cylindrical bodies, the axes of which lie in a common horizontal plane and are arranged such that the drums 44, 45 are provided at a distance from one another. The drums 44, 45 have the same length such that their front, free edges are aligned with one another.
  • a web 46 extends from the support column 40 and runs parallel to the drums and serves to hold intermediate walls 47, 48.
  • the latter are designed in the form of ring disks, the ring openings of which are penetrated by the drums 44 and 45, respectively.
  • the drum jacket surface is provided with radially outwardly directed annular collar R which is aligned with the plane of the intermediate walls 47, 48.
  • the height of each ring collar R is at least as large as the material thickness of the thread F to be processed. In practice, this means that a few millimeters are selected for the height.
  • the aforementioned ring collars R form a gap 51 in connection with the ring openings of the intermediate walls 47, 48, which corresponds at least approximately to the thread diameter. This gap 51 runs concentrically to the ring collar R or to the drum casing wall T.
  • the aforementioned ring collars R are preferably made of the same material as the drum casing wall T.
  • the drum jacket wall T has on one or more drum sections a rib-like elevation 52 running in the axial direction.
  • this is formed by a rod 53 inserted into the drum jacket wall T, the peripheral surface of which protrudes beyond the drum jacket wall T and forms a board there.
  • a rod 53 which is circular in cross section and whose Length corresponds approximately to that of the drums 44, 45. This means that it also passes through the ring collar R of each drum 44, 45. Accordingly, the rod 53 does not protrude beyond the ring collar in the radial direction, but is offset in the inward direction.
  • rod sections could also be used which extend between the ring collar R and end at the latter.
  • a cover 54 covering the drums 44, 45 and the intermediate walls 47, 48 is also provided.
  • the latter is U-shaped in cross-section.
  • the web 55 of the U-profile extends in front of the end faces of the drums 44, 45 or the outer intermediate walls 47, 48, while the legs 56, 56 'of the U-profile extend to the outer edge of the intermediate walls 47, 48 and there one Protect the thread from jumping over from one drum area over the intermediate wall into the other drum area.
  • each drum jacket surface of each drum is associated with an approximately radially oriented air baffle 59, 60 such that it lies in the circumferential direction just behind the tangent point between the thread F and the drum jacket surface.
  • Each air baffle bar 59, 60 is seated on an arm 61 or 62 which can be pivoted in the direction of the center of the drums 44, 45.
  • the bearing point for the arm 61, 62 is formed by the supporting web 46 for the intermediate walls 47, 48, compare FIG. 4.
  • the arms 61 , 62 are diametrically opposite directed and designed identically, so that almost the same conditions exist.
  • the arms 61, 62 can be firmly clamped to the supporting web. The swiveling is then only necessary when adjusting the arms.
  • the aforementioned air baffle bars 59, 60 grind on the drum jacket surface and consist of felt of appropriate thickness. Therefore, they can briefly avoid contact with the rib-like elevations 52 in order to then return to the contact position with the drum jacket surface.
  • Each air baffle bar 59, 60 is composed of several short sections, which generally correspond to the distance between the partition walls 47, 48. Therefore, the air baffle bars 59, 60 with their sections fill the form between the ring collars R and the intermediate walls 47, 48.
  • the thread F does not slip.
  • the tension increases while the thread slips along with it.
  • the rod 53 forming the rib-like elevation 52 constantly ventilates the partial wraps of the thread F while avoiding excessive heating thereof, see FIG. 4. From this figure it can be seen that the rib-like elevation 52 of the thread from the drum jacket wall T im corresponding area is lifted off.
  • the thread delivery device can be assigned a time-delayed synchronous circuit of the drum drive for driving the associated weaving machine.
  • the ring collars R prevent the thread from being able to pass from one partial area to the other.
  • the partitions 47, 48 and the cover 54 also contribute to this.
  • the air baffle bars 59, 60 generate an air flow in the case of drums 44, 45 rotating in the direction of the arrow, which air flow is directed out of the gusset, ie away from the drum. This prevents the thread from getting into the gusset of the drums and being unwantedly wound onto one or the other drum.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Knitting Machines (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Vehicle Body Suspensions (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention relates to a delivery device for running yarns, especially for feeding these to yarn-processing machines, such as, for example, for the insertion of the weft yarn into a weaving machine, in which device the yarn is fed tangentially to a drum connected to a rotary drive and is taken off from this again by means of a draw-off force acting on the far side of the drum, the yarn looping round only part of the circumference of the drum rotating at a circumferential speed higher than the yarn draw-off speed and being capable of being brought, by means of the draw-off force applied tangentially relative to the drum, into slipping engagement with the drum outer surface, and at least two drums adjacent to one another in an axis-parallel manner being so subdivided by fixed partition walls that each of the drums forms a plurality of regions, located in succession in the direction of the drum axis, for part looping by the yarn, in such a way that the yarn passes over from the region of the drum onto the region of the other drum. To optimise the operating mode of a delivery device of this type, the invention proposes that the drum outer surface have a radially outward-directed annular collar (R) in alignment with the plane of each of the partition walls (47, 48). <IMAGE>

Description

Die Erfindung betrifft eine Liefervorrichtung für laufende Fäden, insbesondere zur Zubringung derselben zu fadenverarbeitenden Maschinen, wie beispielsweise zum Eintrag des Schußfadens in eine Webmaschine, bei welcher Vorrichtung der Faden einer mit einem Drehantrieb verbundenen Trommel tangential zugeführt und durch eine jenseits der Trommel wirkende Abzugskraft wieder von dieser abgenommen wird, wobei der Faden nur einen Teilumfang der mit einer gegenüber der Fadenabzugsgeschwindigkeit höheren Umfangsgeschwindigkeit drehenden Trommel umschlingt und über die tangential zur Trommel liegende Abzugskraft in Schlupfmitnahme zur Trommelmantelfläche bringbar ist, wobei mindestens zwei einander achsparallel benachbarte Trommeln durch ortsfest stehende Zwischenwände so unterteilt sind, daß jede der Trommeln mehrere in Trommelachsrichtung hintereinanderliegende Bereiche zur Teilumschlingung durch den Faden bildet derart, daß der Faden vom Bereich der einen Trommel auf den Bereich der anderen Trommel übertritt.The invention relates to a delivery device for running threads, in particular for feeding the same to thread-processing machines, such as for example for feeding the weft thread into a weaving machine, in which device the thread is fed tangentially to a drum connected to a rotary drive and again by a pulling force acting beyond the drum this is removed, with the thread only wrapping around a partial circumference of the drum rotating at a higher peripheral speed than the thread take-off speed, and can be brought into slipping along with the drum jacket surface via the pull-off force tangential to the drum, with at least two drums which are adjacent to one another and being axially parallel are subdivided by stationary partition walls that each of the drums forms a plurality of regions lying one behind the other in the drum axis direction for partial wrap through the thread such that the thread extends from the region of one drum to the region de r passes over to another drum.

Eine solche Liefervorrichtung ist aus der EP-A-0 387 546 bekannt (Stand der Technik nach Artikel 54(3) EPÜ).Such a delivery device is known from EP-A-0 387 546 (prior art under Article 54 (3) EPC).

Vorteilhaft an der bekannten Liefervorrichtung ist, daß unter Vermeidung der Stop- and Go- Arbeitsweise der Trommel eine Minimierung der Fadenabzugsspannung erzielt ist und daß selbst bei schwierig gestalteten Fäden Mehrfachumschlingungen an den Trommeln möglich sind unter weitgehender Verhinderung eines Übereinandertretens von Fadenlagen.An advantage of the known delivery device is that, while avoiding the stop-and-go mode of operation of the drum, a minimization of the thread take-off tension is achieved and that even with difficultly designed threads, multiple wraps on the drums are possible while largely preventing thread layers from overlapping.

Dem Gegenstand der Erfindung liegt die Aufgabe zugrunde, eine Liefervorrichtung der in Rede stehenden Art dahingehend weiterzubilden, daß eine Optimierung hinsichtlich der Arbeitsweise erreicht ist.The object of the invention is based on the object of developing a delivery device of the type in question in such a way that an optimization with regard to the mode of operation is achieved.

Gelöst wird die Erfindungsaufgabe dadurch, daß die Trommelmantelfläche fluchtend zur Ebene der Zwischenwände je einen radial auswärts gerichteten Ringkragen besitzt.The object of the invention is achieved in that the drum jacket surface, in alignment with the plane of the intermediate walls, has a radially outwardly directed annular collar.

Die Unteransprüche stellen vorteilhafte Weiterbildungen der erfinderischen Lösung dar.The subclaims represent advantageous developments of the inventive solution.

Zufolge derartiger Ausgestaltung ist eine Liefervorrichtung Art angegeben, die sich durch eine optimale Arbeitsweise auszeichnet. Sowohl die Zwischenwände als auch die mit ihnen fluchtenden Ringkragen der Trommelmantelfläche verhindern mit Sicherheit, daß bei einer Mehrfachumschlingung der Trommeln einander benachbarte Fadenlagen übereinander treten können. Hieraus resultierende Störungen beim Fadenabzug sind demgemäß eliminiert. Die Höhe des Ringkragens entspricht mindestens der Fadendicke. Vorzugsweise ist eine Höhe von einigen Millimetern gewählt, so daß mit einer einzigen Liefervorrichtung unterschiedlichste Garne verarbeitet werden können. Wenn man zwischen dem Ringkragen und der Zwischenwand einen Ringspalt beläßt, dessen Größe ebenfalls mindesten etwa der Garnstärke entspricht, wird auch vermieden, daß sich dort Fadenmaterial einzwängen kann. Hierdurch wird die optimale Arbeitsweise der Liefervorrichtung noch weiter unterstützt. Damit der von den Trommeln umgelenkte Faden niemals seine vorschriftsmäßige Bahn verlassen kann, ist noch die auf die Trommelmantelfläche etwa radial ausgerichtete Luftstauleiste vorgesehen. Diese erstreckt sich in Umfangsrichtung kurz hinter dem Tangentenpunkt zwischen Faden und Trommelmantelfläche. Die Luftstauleiste erzeugt eine Luftströmung, die von der Trommel weggerichtet ist und demgemäß in gewisser Hinsicht gegen die Fadenlagen drückt. Dadurch wird vermieden, daß der Faden sich in den Zwickel der Trommeln einsaugt und sich auf die eine oder andere Trommel aufwickelt. Die Ringkragen unterstützen den vorgenannten Effekt dahingehend, daß die Luftströmung nicht seitwärts an den Trommeln austritt, sondern gezielt auf die Fadenlagen wirkt. Strömungstechnische wie bautechnische Vorteile ergeben sich dadurch, die Luftstauleiste an einem in Richtung zum Zentrum der Trommelschwenkbaren Arm vorzusehen. Gehalten ist dieser von dem Tragsteg der Zwischenwände, so daß der sowieso vorhandene Tragsteg eine weitere Funktion ausübt. Die Anordnung zweier diametral entgegengesetzt verlaufender Arme mit Luftstauleisten sorgt dafür, daß weder in den oberen noch unteren, von den Trommeln gebildeten Zwickel Garnmaterial eingesaugt werden kann. Insbesondere bietet es sich an, die Luftstauleisten von einem auf der Trommmelmantelfläche schleifenden Filz zu bilden. Einerseits besitzt dieser die nötige Luftundurchlässigkeit. Andererseits ist er jedoch mit der erforderlichen Flexibilität ausgestattet.As a result of such a configuration, a delivery device type is specified which is characterized by an optimal mode of operation. Both the partitions and the ring collar of the drum jacket surface which are flush with them prevent with certainty that in the event of multiple wrapping of the drums, adjacent layers of thread can step over one another. Faults in thread take-off resulting therefrom are accordingly eliminated. The height of the ring collar corresponds at least the thread thickness. A height of a few millimeters is preferably selected so that a wide variety of yarns can be processed with a single delivery device. If one leaves an annular gap between the ring collar and the intermediate wall, the size of which also corresponds at least approximately to the thread size, it is also avoided that thread material can get caught there. This further supports the optimal functioning of the delivery device. So that the thread deflected by the drums can never leave its proper path, the air baffle bar, which is approximately radially oriented on the drum jacket surface, is also provided. This extends in the circumferential direction just behind the tangent point between the thread and the drum surface. The air baffle creates an air flow that is directed away from the drum and accordingly presses against the thread layers in a way. This prevents the thread from being sucked into the gusset of the drums and from being wound onto one or the other drum. The ring collars support the above-mentioned effect in that the air flow does not emerge sideways on the drums, but acts specifically on the thread layers. Fluidic and structural advantages result from providing the air baffle bar on an arm which can be pivoted towards the center of the drum. This is held by the supporting web of the partition walls, so that the supporting web, which is present anyway, performs another function. The arrangement of two diametrically opposed arms with air baffle bars ensures that yarn material cannot be sucked into either the upper or lower gusset formed by the drums. In particular, it is advisable to form the air baffle bars from a felt that grinds on the surface of the drum shell. On the one hand, it has the necessary airtightness. On the other hand however, it is equipped with the required flexibility.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen erläutert. Es zeigt:

Fig. 1
eine Ansicht der Fadenliefervorrichtung,
Fig. 2
teils in Draufsicht, teils im Längsschnitt die Fadenliefervorrichtung,
Fig. 3
einen Vertikalschnitt durch die Fadenliefervorrichtung im Bereich einer Trommel und
Fig. 4
einen Querschnitt durch die gleichsinnig angetriebenen Trommeln der Fadenliefervorrichtung.
An embodiment of the invention is explained below with reference to the drawings. It shows:
Fig. 1
a view of the thread delivery device,
Fig. 2
partly in top view, partly in longitudinal section, the thread delivery device,
Fig. 3
a vertical section through the thread delivery device in the region of a drum and
Fig. 4
a cross section through the same-driven drums of the thread delivery device.

Die Fadenliefervorrichtung besitzt eine Tragsäule 40, in der ein nicht veranschaulichter Trommelantrieb untergebracht ist. Über einen Antriebsriemen 41 werden Riemenscheiben 42, 43 in gleichsinnige Umdrehung versetzt, welche Riemenscheiben fest mit je einer Trommel 44, 45 verbunden sind. Es handelt sich bezüglich der Trommeln 44, 45 um freifliegend gelagerte kreiszylinderische Körper, deren Achsen in einer gemeinsamen horizontalen Ebene liegen und so angeordnet sind, daß die Trommeln 44, 45 im Abstand zueinander vorgesehen sind. Die Trommeln 44, 45 besitzen gleiche Länge derart, daß ihre stirnseitigen, freien Kanten miteinander fluchten.The thread delivery device has a support column 40 in which a drum drive, not shown, is accommodated. Via a drive belt 41, pulleys 42, 43 are rotated in the same direction, which pulleys are firmly connected to a drum 44, 45. With regard to the drums 44, 45, these are free-floating circular cylindrical bodies, the axes of which lie in a common horizontal plane and are arranged such that the drums 44, 45 are provided at a distance from one another. The drums 44, 45 have the same length such that their front, free edges are aligned with one another.

Im Abstandsbereich zwischen beiden Trommeln 44, 45 erstreckt sich ein von der Tragsäule 40 ausgehender, parallel zu den Trommeln verlaufender Steg 46, welcher zur Halterung von Zwischenwänden 47, 48 dient. Letztere sind in Form von Ringscheiben gestaltet, deren Ringöffnungen von den Trommeln 44 bzw. 45 durchsetzt werden.In the spacing area between the two drums 44, 45, a web 46 extends from the support column 40 and runs parallel to the drums and serves to hold intermediate walls 47, 48. The latter are designed in the form of ring disks, the ring openings of which are penetrated by the drums 44 and 45, respectively.

In den sich einander überlappenden Bereichen der Zwischenwände 47, 48 befinden sich Bohrungen, die der Steg 46 durchgreift. Zwischen einander benachbarten Zwischenwänden 47, 48 erstrecken sich Distanzringe 49. Mittels dieser und einer Schraube 50 sind die Zwischenwände 47, 48 unverrückbar auf dem Steg 46 gehalten. Auf diese Weise werden die Trommelmantelflächen in einzelne achsenversetzt zueinanderliegende Bereiche a' bis h' unterteilt.In the overlapping areas of the intermediate walls 47, 48 there are bores through which the web 46 extends. Spacer rings 49 extend between adjacent intermediate walls 47, 48. By means of this and a screw 50, the intermediate walls 47, 48 are held immovably on the web 46. In this way, the drum jacket surfaces are divided into individual regions a 'to h' which are offset from one another.

Die Trommelmantelfläche ist mit fluchtend zur Ebene der Zwischenwände 47, 48 verlaufenden, radial auswärts gerichteten Ringkragen R versehen. Die Höhe jedes Ringkragens R ist mindestens so groß wie die zu verarbeitende Materialstärke des Fadens F. In der Praxis sieht dies so aus, daß für die Höhe einige Millimeter gewählt sind.The drum jacket surface is provided with radially outwardly directed annular collar R which is aligned with the plane of the intermediate walls 47, 48. The height of each ring collar R is at least as large as the material thickness of the thread F to be processed. In practice, this means that a few millimeters are selected for the height.

Die vorgenannten Ringkragen R bilden in Verbindung mit den Ringöffnungen der Zwischenwände 47, 48 einen Spalt 51, der mindestens etwa dem Fadendurchmesser entspricht. Dieser Spalt 51 verläuft konzentrisch zum Ringkragen R bzw. zur Trommelmantelwand T. Vorzugsweise sind die vorerwähnten Ringkragen R materialeinheitlich mit der Trommelmantelwand T ausgebildet.The aforementioned ring collars R form a gap 51 in connection with the ring openings of the intermediate walls 47, 48, which corresponds at least approximately to the thread diameter. This gap 51 runs concentrically to the ring collar R or to the drum casing wall T. The aforementioned ring collars R are preferably made of the same material as the drum casing wall T.

Die Trommelmantelwand T besitzt auf einem oder mehreren Trommelabschnitten eine in Achsrichtung verlaufende rippenartige Erhöhung 52. Diese ist beim Ausführungsbeispiel von einem in die Trommelmantelwand T eingelegten Stab 53 gebildet, dessen Umfangsfläche die Trommelmantelwand T überragt und dort einen Vorstand formt. Es liegt ein im Querschnitt kreisförmiger Stab 53 vor, dessen Länge etwa derjenigen der Trommeln 44, 45 entspricht. Das bedeutet, daß er auch die Ringkragen R jeder Trommel 44, 45 durchgreift. Der Stab 53 überragt den Ringkragen demgemäß nicht in radialer Richtung, sondern liegt versetzt hierzu in Einwärtsrichtung. Anstelle eines durchgehenden Stabes könnten jedoch auch Stababschnitte eingesetzt werden, die sich zwischen den Ringkragen R erstrecken und an diesen enden.The drum jacket wall T has on one or more drum sections a rib-like elevation 52 running in the axial direction. In the exemplary embodiment, this is formed by a rod 53 inserted into the drum jacket wall T, the peripheral surface of which protrudes beyond the drum jacket wall T and forms a board there. There is a rod 53 which is circular in cross section and whose Length corresponds approximately to that of the drums 44, 45. This means that it also passes through the ring collar R of each drum 44, 45. Accordingly, the rod 53 does not protrude beyond the ring collar in the radial direction, but is offset in the inward direction. Instead of a continuous rod, rod sections could also be used which extend between the ring collar R and end at the latter.

Es wäre möglich, den Stab 53 so der Trommelwand T zuzuordnen, daß er entgegen Federwirkung radial einwärts verlagerbar ist. Es ist nicht besonders hervorzuheben, daß die Auswärtsverlagerung des Stabes dann begrenzt sein müßte.It would be possible to assign the rod 53 to the drum wall T in such a way that it can be displaced radially inwards against the action of the spring. It is not particularly noteworthy that the outward displacement of the rod should then be limited.

Weiterhin ist noch ein die Trommeln 44, 45 und die Zwischenwände 47, 48 überfangender Deckel 54 vorgesehen. Letzterer ist im Querschnitt u- förmig gestaltet. Der Steg 55 des U- Profils erstreckt sich vor den Stirnseiten der Trommeln 44, 45 bzw. den äußeren Zwischenwände 47, 48, während die Schenkel 56, 56' des U- Profiles bis zu den Außenrandkanten der Zwischenwände 47, 48 reichen und dort einen Überspringschutz des Fadens von einem Trommelbereich über die Zwischenwand in den anderen Trommelbereich bilden.Furthermore, a cover 54 covering the drums 44, 45 and the intermediate walls 47, 48 is also provided. The latter is U-shaped in cross-section. The web 55 of the U-profile extends in front of the end faces of the drums 44, 45 or the outer intermediate walls 47, 48, while the legs 56, 56 'of the U-profile extend to the outer edge of the intermediate walls 47, 48 and there one Protect the thread from jumping over from one drum area over the intermediate wall into the other drum area.

Sodann ist der Trommelmantelfläche jeder Trommel eine etwa radial ausgerichtete Luftstauleiste 59, 60 zugeordnet derart, daß sie in Umfangsrichtung kurz hinter dem Tangentenpunkt zwischen Faden F und Trommelmantelfläche liegt. Jede Luftstauleiste 59, 60 sitzt an einem in Richtung zum Zentrum der Trommeln 44, 45 schwenkbaren Arm 61 bzw. 62. Die Lagerstelle für den Arm 61, 62 bildet der Tragsteg 46 für die Zwischenwände 47, 48, vergleiche Figur 4. Die Arme 61, 62 sind diametral entgegengesetzt gerichtet und identisch gestaltet, so daß nahezu gleiche Bedingungen vorliegen. Die Arme 61, 62 können fest am Tragsteg verspannt sein. Die Schwenkbarkeit ist dann nur beim Justieren der Arme erforderlich. Sie können jedoch auch während des Betriebes schwenkbeweglich gestaltet sein. Dann ist es zumindest erforderlich, den unteren Arm 62 durch eine nicht veranschaulichte Federin die Wirkungsstellung zu bringen, in welcher die Luftstauleiste 60 an der Trommelmantelfläche der Trommel 45 anliegt. Dem anderen schwenkbaren Arm 61 könnte ebenfalls eine Feder zugeordnet sein.Then the drum jacket surface of each drum is associated with an approximately radially oriented air baffle 59, 60 such that it lies in the circumferential direction just behind the tangent point between the thread F and the drum jacket surface. Each air baffle bar 59, 60 is seated on an arm 61 or 62 which can be pivoted in the direction of the center of the drums 44, 45. The bearing point for the arm 61, 62 is formed by the supporting web 46 for the intermediate walls 47, 48, compare FIG. 4. The arms 61 , 62 are diametrically opposite directed and designed identically, so that almost the same conditions exist. The arms 61, 62 can be firmly clamped to the supporting web. The swiveling is then only necessary when adjusting the arms. However, they can also be designed to be pivotable during operation. Then it is at least necessary to bring the lower arm 62 into the operative position by means of a spring (not illustrated), in which the air baffle bar 60 lies against the drum jacket surface of the drum 45. A spring could also be assigned to the other pivotable arm 61.

Die vorgenannten Luftstauleisten 59, 60 schleifen auf der Trommelmantelfläche und bestehen aus Filz entsprechender Stärke. Daher können sie bei Berührungskontakt mit den rippenartigen Erhöhungen 52 kurzfristig ausweichen, um danach wieder in die Anlagestellung zur Trommelmantelfläche zu treten.The aforementioned air baffle bars 59, 60 grind on the drum jacket surface and consist of felt of appropriate thickness. Therefore, they can briefly avoid contact with the rib-like elevations 52 in order to then return to the contact position with the drum jacket surface.

Jede Luftstauleiste 59, 60 setzt sich aus mehreren kurzen Abschnitten zusammen, die in der Regel dem Abstand zwischen den Zwischenwänden 47, 48 entsprechen. Daher treten die Luftstauleisten 59, 60 mit ihren Abschnitten formausfüllend zwischen die Ringkragen R und die Zwischenwände 47, 48.Each air baffle bar 59, 60 is composed of several short sections, which generally correspond to the distance between the partition walls 47, 48. Therefore, the air baffle bars 59, 60 with their sections fill the form between the ring collars R and the intermediate walls 47, 48.

Nach Abzug des Fadens F durchläuft dieser in Pfeilrichtung eine einstellbare Fadenbremse 57 und umschlingt in dem aus Figur 2 ersichtlichen Zick-Zack-Verlauf die Trommeln 44, 45. Nach Passieren des Teilbereiches g' verläßt der Faden F durch eine Fadenöse 58 die Fadenliefervorrichtung.After the thread F has been drawn off, it runs through an adjustable thread brake 57 in the direction of the arrow and loops around the drums 44, 45 in the zigzag course shown in FIG. 2.

Tritt am Faden F keine Abzugsspannung auf, findet keine Schlupfmitnahme des Fadens F statt. Beim Einbringen des Fadens in eine Webmaschine, beispielsweise gesteuert durch Wasser oder Luft, nimmt die Spannung zu unter gleichzeitiger Schlupfmitnahme des Fadens. Der die rippenartige Erhöhung 52 bildende Stab 53 lüftet während der Schlupfmitnahme ständig die Teilumschlingungen des Fadens F unter Vermeidung einer zu großen Erhitzung desselben, vergleiche hierzu Figur 4. Aus dieser Figur ist ersichtlich, daß durch die rippenartige Erhöhung 52 der Faden von der Trommelmantelwand T im entsprechenden Bereich abgehoben ist.If there is no pull-off tension on the thread F, the thread F does not slip. When introducing the Thread in a weaving machine, for example controlled by water or air, the tension increases while the thread slips along with it. The rod 53 forming the rib-like elevation 52 constantly ventilates the partial wraps of the thread F while avoiding excessive heating thereof, see FIG. 4. From this figure it can be seen that the rib-like elevation 52 of the thread from the drum jacket wall T im corresponding area is lifted off.

Der Fadenliefervorrichtung kann eine zeitverzögerte Synchronschaltung des Trommelantriebes zum Antrieb der zugehörigen Webmaschine zugeordnet sein.The thread delivery device can be assigned a time-delayed synchronous circuit of the drum drive for driving the associated weaving machine.

Während des Betriebes der Liefervorrichtung verhindern die Ringkragen R, daß der Faden von einem Teilbereich zum anderen gelangen kann. Dazu tragen ebenfalls die Zwischenwände 47, 48 wie auch der Deckel 54 bei.During the operation of the delivery device, the ring collars R prevent the thread from being able to pass from one partial area to the other. The partitions 47, 48 and the cover 54 also contribute to this.

Das Einsaugen des Fadens F in den beiderseits des Tragsteges 56 vorhandenen Zwickel zwischen den Trommeln 44, 45 ist ebenfalls wirksam verhindert, falls die Fadenabzugsspannung nachlassen sollte. Die Luftstauleisten 59, 60 erzeugen nämlich bei in Pfeilrichtung umlaufenden Trommeln 44, 45 eine Luftströmung, die aus den Zwickel heraus, also von der Trommel weggerichtet ist. Dadurch wird vermieden, daß der Faden in den Zwickel der Trommeln gelangt und ungewollt auf die eine oder andere Trommel aufgewickelt wird.The sucking in of the thread F into the gusset between the drums 44, 45, which is present on both sides of the supporting web 56, is also effectively prevented if the thread pull tension should decrease. The air baffle bars 59, 60 generate an air flow in the case of drums 44, 45 rotating in the direction of the arrow, which air flow is directed out of the gusset, ie away from the drum. This prevents the thread from getting into the gusset of the drums and being unwantedly wound onto one or the other drum.

Die in der vorstehenden Beschreibung, der Zeichnung und den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung von Bedeutung sein.The features of the invention disclosed in the above description, the drawing and the claims can be of importance both individually and in any combination for the implementation of the invention.

Claims (6)

  1. Delivery device for moving threads (F), in particular for feeding them to thread-processing machines, such as for example for insertion of the weft thread in a power loom, in which device the thread (F) is supplied tangentially to a drum (44, 45) connected to a rotary drive and removed again therefrom by a take-off force acting on the other side of the drum (44, 45), wherein the thread (F) wraps around only a partial circumference of the drum (44, 45) which rotates at a higher circumferential speed than the thread take-off speed, and can be brought into slipping entrainment relative to the peripheral surface of the drum by the take-off force which is tangential to the drum (44, 45), wherein at least two drums (44, 45) adjacent to each other with parallel axes are divided by stationary partitions (47, 48) in such a way that each of the drums (44, 45) forms several regions located one behind the other in the axial direction of the drum for partial wrap-around by the thread (F), in such a way that the thread (F) passes over from the region of one drum (44, 45) to the region of the other drum, and wherein the peripheral surface of the drum has, in alignment with the plane of the partitions (47, 48), in each case a radially outwardly oriented ring collar (R).
  2. Delivery device according to claim 1, wherein associated with the peripheral surface of the drum is a more or less radially oriented air backpressure strip (59, 60) which is located in the circumferential direction just behind the tangent point between the thread (F) and the peripheral surface of the drum.
  3. Delivery device according to one or more of the preceding claims, wherein the air backpressure strip (59, 60) is mounted on an arm (61, 62) pivotable in a direction towards the centre of the drum (44, 45).
  4. Delivery device according to one or more of the preceding claims, wherein the arm (59, 60) starts from the supporting web (46) of the partitions (47, 48).
  5. Delivery device according to one or more of the preceding claims, wherein two diametrically opposed arms (61, 62) with air backpressure strips (59 or 60) are mounted.
  6. Delivery device according to one or more of the preceding claims, wherein the air backpressure strip (59, 60) is formed by a felt dragging on the peripheral surface of the drum.
EP91108994A 1990-07-05 1991-06-01 Yarn delivering device Expired - Lifetime EP0464378B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021461 1990-07-05
DE4021461A DE4021461A1 (en) 1989-03-11 1990-07-05 Weft transmission

Publications (3)

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EP0464378A2 EP0464378A2 (en) 1992-01-08
EP0464378A3 EP0464378A3 (en) 1992-03-04
EP0464378B1 true EP0464378B1 (en) 1994-12-21

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Application Number Title Priority Date Filing Date
EP91108994A Expired - Lifetime EP0464378B1 (en) 1990-07-05 1991-06-01 Yarn delivering device

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US (1) US5190231A (en)
EP (1) EP0464378B1 (en)
JP (1) JPH0620980B2 (en)
CN (1) CN1026137C (en)
AT (1) ATE115943T1 (en)
BR (1) BR9102796A (en)
CA (1) CA2046223A1 (en)
CO (1) CO4180577A1 (en)
CZ (1) CZ280391B6 (en)
DE (1) DE59103965D1 (en)
ES (1) ES2065581T3 (en)
MX (1) MX173886B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324160A1 (en) * 1993-07-19 1995-01-26 Iro Ab Entry system for a jet loom
CN102251344A (en) * 2010-12-24 2011-11-23 陆晓东 Positive yarn feeding mechanism
CN104894709B (en) * 2015-05-27 2017-08-18 厦门绫亚针织机械配件有限公司 Yarn feeder filters yarn feeding device
CN105442122B (en) * 2015-12-18 2019-03-26 厦门绫亚针织机械配件有限公司 Yarn feeder filters yarn feeding device
CN107444994B (en) * 2017-07-25 2023-08-01 杭州舜海光伏科技有限公司 Rope winding and unwinding device and cleaning equipment

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE476878A (en) * 1939-04-07
US2381643A (en) * 1943-03-18 1945-08-07 American Viscose Corp Method and apparatus for handling filamentary material
US3957218A (en) * 1970-03-19 1976-05-18 Imperial Chemical Industries Limited Self threadable grooved rollers
AT389322B (en) * 1987-01-09 1989-11-27 Evg Entwicklung Verwert Ges DEVICE FOR HEAT TREATING A CONTINUOUSLY PROGRESSIVE METAL WIRE
US4858839A (en) * 1988-04-11 1989-08-22 Niederer Kurt W Yarn tension control apparatus and method

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CA2046223A1 (en) 1992-01-06
US5190231A (en) 1993-03-02
CN1026137C (en) 1994-10-05
JPH04226269A (en) 1992-08-14
CO4180577A1 (en) 1995-06-07
EP0464378A2 (en) 1992-01-08
JPH0620980B2 (en) 1994-03-23
CZ280391B6 (en) 1996-01-17
EP0464378A3 (en) 1992-03-04
CN1058057A (en) 1992-01-22
ES2065581T3 (en) 1995-02-16
MX173886B (en) 1994-04-07
CS203291A3 (en) 1992-02-19
ATE115943T1 (en) 1995-01-15
DE59103965D1 (en) 1995-02-02
BR9102796A (en) 1992-02-04

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