EP1673497B1 - Drawing frame with aprons entwined around twin output top delivery rollers - Google Patents

Drawing frame with aprons entwined around twin output top delivery rollers Download PDF

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Publication number
EP1673497B1
EP1673497B1 EP04790385A EP04790385A EP1673497B1 EP 1673497 B1 EP1673497 B1 EP 1673497B1 EP 04790385 A EP04790385 A EP 04790385A EP 04790385 A EP04790385 A EP 04790385A EP 1673497 B1 EP1673497 B1 EP 1673497B1
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EP
European Patent Office
Prior art keywords
aprons
rollers
twin
drafting unit
unit 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.)
Not-in-force
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EP04790385A
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German (de)
French (fr)
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EP1673497A1 (en
Inventor
Stefan Krawietz
Larissa Ausheyks
Theo GRÜN
Peter Artzt
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Deutsche Institute fuer Textil und Faserforschung Stuttgart
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Deutsche Institute fuer Textil und Faserforschung Stuttgart
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Publication of EP1673497A1 publication Critical patent/EP1673497A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • the invention relates to a drafting system with twin-output top rollers looped around by straps, in which the straps are guided around deflecting members, which are arranged on the region facing away from the clamping surface of the pair of delivery rollers.
  • the drafting roller pairs consist of a lower corrugated steel roller, the so-called lower roller, and an upper roller, the so-called upper roller, which is pressed by a loading device on the lower roller.
  • This top roller usually has an elastic coating, so that no nip line is formed, but by the deformation of the elastic pad a clamping surface, which causes a much better fiber retention. There is a good clamping effect on the fiber structure without damaging the fibers.
  • soft roller coverings result in better distortion results, since the clamping surface is the greater, the softer the covering is.
  • the soft roll coverings have the disadvantage that they wear out very quickly and must be reground.
  • the geometry of the drafting roller and thus also the properties of the lining changed, which in turn adversely affects the draft conditions and thus on the yarn quality.
  • the regrinding of the roll coverings is also a complex measure.
  • straps are used, which endeavor to assume an approximately circular shape in the unloaded state in the circumferential direction. Since the straps are usually made of synthetic material, this endeavor is given.
  • the distance between the skilletoberwalzen and the running surfaces of the deflecting members is chosen so that the straps can bulge in the areas between the upper roller and deflecting by the endeavor to take approximately circular shape in the circumferential direction. They are then only at low pressure on the deflecting and stand accordingly only under low tension. They therefore experience virtually no deceleration, consume no noticeable drive energy and are subject to virtually no wear.
  • the low contact pressure of the straps on the deflecting can be achieved when the diameter of the aspired circular shape about 11 ⁇ 2 to 3 times the circumference of the looped top rollers and the distance between the looped top rollers and the deflection corresponds to half to twice the diameter of the looped top rollers.
  • the two deflecting members of a twin top roller can be formed on a one-piece, rigid holder, which is fastened to a component connected to the twin top roller, advantageously releasably.
  • the holder may have a connectable with the axis of the twin top roller retaining member or on the handlebar of the twin top roller or on Oberwalzentrag- and loading arm be fastened.
  • the invention relates to a drafting of common design with a running over the length of the machine steel output lower roller 1, rest on the Oberwalzenzwillinge 2, of which here in the front view of FIG. 1 only one is shown.
  • the two top rollers 3 and 4 of the upper roller twins have a preferably soft coating 5 in order to achieve the initially described advantageous draft conditions. They are connected by a shaft 6, which is clipped on a spring-loaded arm 7.
  • the handlebar 7 is arranged on a Oberwalzentrag- and loading arm, not shown.
  • one-piece holder 8 are provided, from which laterally two deflecting members 9 protrude from running over the straps 10, 11, which also wrap around the top rollers 3 and 4.
  • These deflecting elements 9 have recessed running surfaces 12, which are bounded by collars 13 and 14 and thus prevent the straps from running off the top rollers 3 and 4 during the course of the drafting system.
  • the straps it is sufficient if they have a circumference which corresponds approximately to 11 ⁇ 2 times the circumference of the top rollers 3, 4.
  • the distance a between the axis of rotation of the top rollers and the running surfaces 12 of the deflecting members 9 then corresponds approximately to the diameter of the top rollers.
  • the circumference of the straps can be increased to about three times the circumference of the top rollers or in some cases even further, in which case the - in FIG. 3 drawn - distance a between the axis of rotation of the upper rollers and the running surfaces 12 of the deflecting members 9 to at least about twice the diameter of the upper rollers would increase. It is understood that the distance a in each case in relation to the circumference and also to the stiffness the straps 10, 11 must stand. For stiffer straps, the distance a should be reduced.
  • the holder 8 of the embodiment of the FIGS. 1 and 2 have two holding members 15 which are alsklippsbar on the shaft 6 of the associated Oberwalzenzwillings 2 and lead the holder.
  • a device can be easily removed from a handlebar 7, if an exchange of the top rollers 3, 4 or the straps 10, 11 is required.
  • the shaft 6 is clipped down from the handlebar and the holding members 15 swung forwards from the shaft.
  • systems are provided which can be formed in the simplest form by the tops of the handlebars 7, on which the central region 16 of the holder 8 hangs up.
  • the holders 8 are alsklippsbar on the handlebar 7 by means of resilient clamps 17 which are connected to the holder.
  • the holder 8 are already held rotatably.
  • the holder 8 may also be hinged to the Oberwalzentrag- and loading arms. In this case, they can, for example, be used in the holders of the upper cleaning rollers which are generally no longer required when using the looping straps.
  • the straps 10, 11 preferably consist of at least two layers, of which the outer layer, which comes into contact with the fibers, meets the requirements of good fiber clamping and low wear, the inner layer running over the running surfaces 12 of the deflecting elements 9 adapts to the requirement of low-friction running is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

The invention relates to a drafting device with twin top front rollers surrounded by aprons in which the aprons are guided around deflection members arranged above the area facing away from the clamping surface of the front roller pair. In order to achieve a low-friction, brake-free and low-wear running of the aprons, they are guided with only a slight tension around the deflection members. For this, the tendency of the aprons to assume a circular form in the circumferential direction is utilized. This tendency brings about, with the appropriately selected interval between the top front rollers and between the surfaces of the deflection members, the low contact pressure on the surfaces striven for and the low tractive tension in the aprons striven for.

Description

Die Erfindung betrifft ein Streckwerk mit von Riemchen umschlungenen Zwillings-Ausgangsoberwalzen, bei dem die Riemchen um Umlenkorgane geführt sind, die auf dem der Klemmfläche des Ausgangswalzenpaares abgekehrten Bereich angeordnet sind.The invention relates to a drafting system with twin-output top rollers looped around by straps, in which the straps are guided around deflecting members, which are arranged on the region facing away from the clamping surface of the pair of delivery rollers.

Beim Verzug von Faserbändem in Streckwerken spielt für die Übertragung der Verzugskräfte auf den Faserverband die Klemmwirkung der Walzenpaare eine ausschlaggebende Rolle. Die Streckwerkswalzenpaare bestehen deshalb aus einer unteren geriffelten Stahlwalze, der sogenannten Unterwalze, und einer oberen Walze, der sogenannten Oberwalze, die durch eine Belastungseinrichtung auf die Unterwalze gedrückt wird. Diese Oberwalze besitzt in der Regel einen elastischen Belag, so dass keine Klemmlinie entsteht, sondern durch die Verformung des elastischen Belages eine Klemmfläche, die eine deutlich bessere Faserzurückhaltung bewirkt. Es wird eine gute Klemmwirkung auf den Faserverband ausgeübt, ohne die Fasern zu schädigen. Erfahrungsgemäß ergeben deshalb weiche Walzenbeläge bessere Verzugsergebnisse, da die Klemmfläche umso größer ist, je weicher der Belag ist. Die weichen Walzenbeläge haben jedoch den Nachteil, dass sie sich sehr schnell abnutzen und nachgeschliffen werden müssen. Dadurch verändert sich die Geometrie der Streckwerkswalze und damit auch die Eigenschaften des Belages, was sich wiederum nachteilig auf die Verzugsverhältnisse und damit auf die Garnqualität auswirkt. Das Nachschleifen der Walzenbeläge ist zudem eine aufwendige Maßnahme.When warping fiber slivers in drafting systems, the clamping action of the roller pairs plays a decisive role in the transmission of the drafting forces to the fiber structure. Therefore, the drafting roller pairs consist of a lower corrugated steel roller, the so-called lower roller, and an upper roller, the so-called upper roller, which is pressed by a loading device on the lower roller. This top roller usually has an elastic coating, so that no nip line is formed, but by the deformation of the elastic pad a clamping surface, which causes a much better fiber retention. There is a good clamping effect on the fiber structure without damaging the fibers. Experience has shown that soft roller coverings result in better distortion results, since the clamping surface is the greater, the softer the covering is. However, the soft roll coverings have the disadvantage that they wear out very quickly and must be reground. As a result, the geometry of the drafting roller and thus also the properties of the lining changed, which in turn adversely affects the draft conditions and thus on the yarn quality. The regrinding of the roll coverings is also a complex measure.

Um hohe Weichheit eines Walzenbelages mit hoher Verschleißfestigkeit zu verbinden und damit optimale Verzugsbedingungen über einen langen Einsatzzeitraum zu erreichen, wird in der nicht vorveröffentlichten DE 102 60 025.2 vorgeschlagen, eine Oberwalze mit weichem Belag durch ein Riemchen mit hoher Verschleißfestigkeit umschlingen zu lassen. Dieses gesonderte Riemchen bietet den Vorteil, bei Verschleiß oder Beschädigung leicht austauschbar zu sein. Auch ein Auswechseln gegen ein Riemchen anderer Härte, anderer Länge oder sonstiger anderer Art oder Qualität ist leicht möglich.In order to combine the high softness of a roll covering with high wear resistance and thus optimum distortion conditions over a long period of use will reach in the not pre-published DE 102 60 025.2 proposed to wrap a top roll with a soft coating through a strap with high wear resistance. This separate strap has the advantage of being easily interchangeable when worn or damaged. It is also easily possible to replace a strap of a different hardness, length or other type or quality.

Es liegt auf der Hand, dass diese Lösung insbesondere am Ausgangswalzenpaar eines Streckwerkes von Vorteil ist, bei dem die Walzen besonders schnell laufen und die den größten Einfluss auf einen zuverlässigen Verzug haben.It is obvious that this solution is particularly advantageous on the output roller pair of a drafting system, in which the rollers run very fast and have the most influence on a reliable delay.

Es ist bekannt ( DE 816 069 ;), die Ausgangsoberwalzen von Streckwerken mit Riemchen zu umschlingen. Der erklärte Zweck dieser recht langen Riemchen besteht darin, das Bilden von Wickeln um die Oberwalzen des Ausgangswalzenpaares zu verhindern. Diesen Riemchen sind Spannvorrichtungen zugeordnet, die sie unter Zugspannung und damit straff halten. Weiter offenbart DE R7 76c 30/04 vom 1.10 1949 ein Streckwerk gemäß dem Oberbegriff des Anspruchs 3It is known ( DE 816,069 ;), the Ausgangsoberwalzen of drafting systems with straps to entwine. The stated purpose of these rather long straps is to prevent the formation of coils around the top rollers of the pair of outfeed rollers. These straps are associated with tensioning devices that hold them under tension and thus taut. Further, DE R7 76c 30/04 of 1.10.1949 discloses a drafting system according to the preamble of claim 3

Die Riemchen sind an diesen Spannvorrichtungen über stillstehende Umlenkorgane geführt. Es hat sich gezeigt, dass durch das Hinwegziehen der Riemchen über diese Umlenkorgane Antriebsenergie verbraucht wird, die Riemchen ein sich nachteilig auf den Verzugsvorgang auswirkendes Abbremsen erfahren und Verschleiß unterliegen. Es ist daher Aufgabe der Erfindung, diese Nachteile zu vermeiden. Sie löste diese Aufgabe durch die in den Kennzeichen der Ansprüche 1 und 3 genannten Merkmale.The straps are guided on these tensioning devices on stationary deflecting elements. It has been shown that driving energy is consumed by the removal of the straps on these deflecting elements, the straps experience a disadvantageous to the delaying impacting deceleration and wear. It is therefore an object of the invention to avoid these disadvantages. It solved this problem by the features mentioned in the characteristics of claims 1 and 3.

Um die Zugspannung in den Riemchen so gering wie möglich zu halten, werden also Riemchen eingesetzt, die bestrebt sind, in unbelastetem Zustand in Umfangsrichtung annähernd Kreisform anzunehmen. Da die Riemchen in aller Regel aus synthetischem Material bestehen, ist dieses Bestreben gegeben. Dabei wird der Abstand zwischen den Ausgangsoberwalzen und den Laufflächen der Umlenkorgane so gewählt, dass die Riemchen sich durch das Bestreben, in Umfangsrichtung annähernd Kreisform anzunehmen, in den Bereichen zwischen Oberwalze und Umlenkorgan auswölben können. Sie liegen dann nur mit geringem Druck an den Umlenkorganen an und stehen demgemäß nur unter geringer Zugspannung. Sie erfahren daher praktisch keine Abbremsung, verbrauchen keine merkbare Antriebsenergie und unterliegen praktisch keinem Verschleiß.In order to keep the tension in the straps as low as possible, so straps are used, which endeavor to assume an approximately circular shape in the unloaded state in the circumferential direction. Since the straps are usually made of synthetic material, this endeavor is given. The distance between the Ausgangsoberwalzen and the running surfaces of the deflecting members is chosen so that the straps can bulge in the areas between the upper roller and deflecting by the endeavor to take approximately circular shape in the circumferential direction. They are then only at low pressure on the deflecting and stand accordingly only under low tension. They therefore experience virtually no deceleration, consume no noticeable drive energy and are subject to virtually no wear.

Begünstigt wird diese Wirkung noch, wenn der Reibungsbeiwert zwischen der inneren, der Laufschicht der Riemchen und den Umlenkorganen durch entsprechende Materialpaarung möglichst gering gehalten wird.This effect is favored even if the coefficient of friction between the inner, the running layer of the straps and the deflection is kept as low as possible by appropriate material pairing.

Der geringe Anlagedruck der Riemchen an den Umlenkorganen kann dann erreicht werden, wenn der Durchmesser der anstrebten Kreisform etwa dem 1½ bis 3fachen des Umfangs der umschlungenen Oberwalzen und der Abstand zwischen den umschlungenen Oberwalzen und den Umlenkorganen dem halben bis dem doppelten Durchmesser der umschlungenen Oberwalzen entspricht.The low contact pressure of the straps on the deflecting can be achieved when the diameter of the aspired circular shape about 1½ to 3 times the circumference of the looped top rollers and the distance between the looped top rollers and the deflection corresponds to half to twice the diameter of the looped top rollers.

In diesem Falle können die beiden Umlenkorgane einer Zwillingsoberwalze an einem einstückigen, starren Halter angeformt sein, der an einem mit der Zwillingsoberwalze verbundenen Bauteil - vorteilhafter Weise lösbar - befestigt ist. Der Halter kann ein mit der Achse der Zwillingsoberwalze verbindbares Halteglied aufweisen oder am Lenker der Zwillingsoberwalze oder am Oberwalzentrag- und Belastungsarm befestigbar sein.In this case, the two deflecting members of a twin top roller can be formed on a one-piece, rigid holder, which is fastened to a component connected to the twin top roller, advantageously releasably. The holder may have a connectable with the axis of the twin top roller retaining member or on the handlebar of the twin top roller or on Oberwalzentrag- and loading arm be fastened.

Zum seitlichen Führen der Riemchen sind Anlaufflächen vorgesehen.For lateral guidance of the aprons contact surfaces are provided.

In den Figuren der Zeichnung sind zwei bevorzugte Ausführungsbeispiele der Erfindung dargestellt. Es zeigen

Fig. 1
die Vorderansicht eines Streckwerkes in einer ersten Ausführungsform der Erfindung im Schnitt in Ebene A-A;
Fig. 2
die Seitenansicht des Gegenstandes der Fig. 1;
Fig. 3
eine weitere Möglichkeit zum Befestigen eines Halters in Vorderansicht;
Fig. 4
die Seitenansicht des Gegenstandes der Fig. 3.
In the figures of the drawing two preferred embodiments of the invention are shown. Show it
Fig. 1
the front view of a drafting system in a first embodiment of the invention in section in plane AA;
Fig. 2
the side view of the object of the Fig. 1 ;
Fig. 3
another way to attach a holder in front view;
Fig. 4
the side view of the object of the Fig. 3 ,

Die Erfindung geht aus von einem Streckwerk geläufiger Bauart mit einer über die Länge der Maschine durchlaufenden stählernen Ausgangs-Unterwalze 1, auf der Oberwalzenzwillinge 2 aufliegen, von denen hier in den Vorderansicht der Figur 1 nur einer dargestellt ist. Die beiden Oberwalzen 3 und 4 der Oberwalzenzwillinge weisen einen vorzugsweise weichen Belag 5 auf, um die eingangs geschilderten vorteilhaften Verzugsbedingungen zu erreichen. Sie sind durch eine Welle 6 verbunden, die an einem federbelasteten Lenker 7 eingeklippst ist. Der Lenker 7 ist an einem nicht dargestellten Oberwalzentrag- und Belastungsarm angeordnet.The invention relates to a drafting of common design with a running over the length of the machine steel output lower roller 1, rest on the Oberwalzenzwillinge 2, of which here in the front view of FIG. 1 only one is shown. The two top rollers 3 and 4 of the upper roller twins have a preferably soft coating 5 in order to achieve the initially described advantageous draft conditions. They are connected by a shaft 6, which is clipped on a spring-loaded arm 7. The handlebar 7 is arranged on a Oberwalzentrag- and loading arm, not shown.

Erfindungsgemäß sind vorzugsweise aus Spritzguss hergestellte, einstückige Halter 8 vorgesehen, von denen seitlich zwei Umlenkorgane 9 ab ragen, über die Riemchen 10, 11 laufen, die auch die Oberwalzen 3 und 4 umschlingen. Diese Umlenkorgane 9 weisen vertiefte Laufflächen 12 auf, die durch Bünde 13 bzw. 14 begrenzt sind und so beim Lauf des Streckwerkes die Riemchen an seitlichem Ablaufen von den Oberwalzen 3 und 4 hindern.According to the invention preferably made of injection molded, one-piece holder 8 are provided, from which laterally two deflecting members 9 protrude from running over the straps 10, 11, which also wrap around the top rollers 3 and 4. These deflecting elements 9 have recessed running surfaces 12, which are bounded by collars 13 and 14 and thus prevent the straps from running off the top rollers 3 and 4 during the course of the drafting system.

Wie an der Auswölbung der Riemchen 10, 11 in Figur 2 zwischen den Oberwalzen 3, 4 und den Umlenkorganen 9 erkennbar, sind diese nur lose um die Umlenkorgane gelegt und stehen demgemäß nur unter der geringen Spannung, die allein durch das Bestreben der Riemchen verursacht ist, in Umfangsrichtung Kreisform einzunehmen.As at the bulge of the straps 10, 11 in FIG. 2 between the top rollers 3, 4 and the deflecting 9 recognizable, they are only loosely placed around the deflecting elements and are therefore only under the low voltage, which is caused solely by the tendency of the straps to assume circular shape in the circumferential direction.

Für die angestrebte Wirkungsweise der Riemchen genügt es bereits, wenn sie einen Umfang aufweisen, der etwa dem 1½fachen des Umfangs der Oberwalzen 3, 4 entspricht. Der Abstand a zwischen der Drehachse der Oberwalzen und den Laufflächen 12 der Umlenkorgane 9 entspricht dann etwa dem Durchmesser der Oberwalzen. Der Umfang der Riemchen kann aber auf das etwa Dreifache des Umfangs der Oberwalzen oder in manchen Fällen auch noch weiter erhöht werden, wobei dann der - in Figur 3 eingezeichnete - Abstand a zwischen der Drehachse der Oberwalzen und den Laufflächen 12 der Umlenkorgane 9 auf mindestens etwa das Doppelte des Durchmessers der Oberwalzen zu erhöhen wäre. Es versteht sich, dass der Abstand a jeweils in entsprechender Relation zum Umfang und auch zur Steifheit der Riemchen 10, 11 stehen muss. Bei steiferen Riemchen sollte der Abstand a vermindert werden.For the desired effect of the straps, it is sufficient if they have a circumference which corresponds approximately to 1½ times the circumference of the top rollers 3, 4. The distance a between the axis of rotation of the top rollers and the running surfaces 12 of the deflecting members 9 then corresponds approximately to the diameter of the top rollers. However, the circumference of the straps can be increased to about three times the circumference of the top rollers or in some cases even further, in which case the - in FIG. 3 drawn - distance a between the axis of rotation of the upper rollers and the running surfaces 12 of the deflecting members 9 to at least about twice the diameter of the upper rollers would increase. It is understood that the distance a in each case in relation to the circumference and also to the stiffness the straps 10, 11 must stand. For stiffer straps, the distance a should be reduced.

Die Halter 8 der Ausführungsform der Figur 1 und 2 weisen zwei Halteglieder 15 auf, die auf die Welle 6 des zugeordneten Oberwalzenzwillings 2 aufklippsbar sind und die Halter führen. Eine Vorrichtung kann so ohne weiteres von einem Lenker 7 abgenommen werden, wenn ein Austausch der Oberwalzen 3, 4 oder der Riemchen 10, 11 erforderlich ist. Hierzu wird die Welle 6 nach unten aus dem Lenker geklippst und die Halteglieder 15 nach vorne von der Welle abgeschwenkt. Beim Lauf des Streckwerkes sind die Halter 8 bestrebt, sich mit den Oberwalzen 3, 4 in der Seitenansicht der Figur 2 im Uhrzeigersinn zu drehen. Um dies zu verhindern, sind Anlagen vorgesehen, die in einfachster Form durch die Oberseiten der Lenker 7 gebildet werden können, auf die sich der mittlere Bereich 16 der Halter 8 auflegt.The holder 8 of the embodiment of the FIGS. 1 and 2 have two holding members 15 which are aufklippsbar on the shaft 6 of the associated Oberwalzenzwillings 2 and lead the holder. A device can be easily removed from a handlebar 7, if an exchange of the top rollers 3, 4 or the straps 10, 11 is required. For this purpose, the shaft 6 is clipped down from the handlebar and the holding members 15 swung forwards from the shaft. When running the drafting the holders 8 are endeavored with the top rollers 3, 4 in the side view of FIG. 2 to turn clockwise. To prevent this, systems are provided which can be formed in the simplest form by the tops of the handlebars 7, on which the central region 16 of the holder 8 hangs up.

In der Ausführungsform der Figuren 3 und 4 sind die Halter 8 mittels federnder Klammern 17, die mit dem Halter verbunden sind, auf die Lenker 7 aufklippsbar. Hierbei sind die Halter 8 bereits drehfest gehaltert.In the embodiment of the FIGS. 3 and 4 the holders 8 are aufklippsbar on the handlebar 7 by means of resilient clamps 17 which are connected to the holder. Here, the holder 8 are already held rotatably.

Wie nicht näher dargestellt, können die Halter 8 auch an den Oberwalzentrag- und Belastungsarmen angelenkt sein. In diesem Falle können sie bspw. in die Halterungen der beim Einsatz der umschlingenden Riemchen in aller Regel nicht mehr erforderlichen oberen Reinigungswalzen eingesetzt werden.As not shown in detail, the holder 8 may also be hinged to the Oberwalzentrag- and loading arms. In this case, they can, for example, be used in the holders of the upper cleaning rollers which are generally no longer required when using the looping straps.

Die Riemchen 10, 11 bestehen vorzugsweise aus zumindest zwei Schichten, von denen die äußere, mit den Fasern in Kontakt tretende Schicht den Erfordernissen einer guten Faserklemmung und geringen Verschleißes, die innere, über die Laufflächen 12 der Umlenkorgane 9 laufende Schicht dem Erfordernis reibungsarmen Laufes angepasst ist.The straps 10, 11 preferably consist of at least two layers, of which the outer layer, which comes into contact with the fibers, meets the requirements of good fiber clamping and low wear, the inner layer running over the running surfaces 12 of the deflecting elements 9 adapts to the requirement of low-friction running is.

BezugszahlenlisteLIST OF REFERENCE NUMBERS

11
AusgangsunterwalzeBottom rollers
22
OberwalzenzwillingTop roller twin
33
Oberwalzetop roll
44
Oberwalzetop roll
55
Belag der Oberwalzen 3, 4Covering of top rollers 3, 4
66
Welle des Oberwalzenzwillings 2Wave of the upper roll twin 2
77
Lenkerhandlebars
88th
Halterholder
99
Umlenkorgan am Halter 8Deflection member on the holder 8
1010
RiemchenStrappy
1111
RiemchenStrappy
1212
Halteglieder am Halter 8Holding members on the holder. 8
1313
Lauffläche des Umlenkorgans 9Running surface of the deflecting 9th
1414
Bund am Halter 8Collar on the holder 8
1515
Bund am Halter 8Collar on the holder 8
1616
Mittlerer Bereich des Halters 8Middle area of the holder 8
1717
Klammerclip

Claims (11)

  1. A method for guiding aprons entwining the twin-type delivery top rollers of drafting units where the aprons are passed around reversing members which are disposed on the area facing away from the clamping surface of the pair of delivery top rollers, characterized in that the aprons substantially are subjected to that low tensile stress which is caused by their efforts of assuming an approximately circular shape in a circumferential direction.
  2. The method according to claim 1, characterized in that the distance between the delivery top rollers and the running faces of the reversing members is chosen such as to cause the tensile stress in the aprons solely by their efforts of assuming an approximately circular shape in a circumferential direction.
  3. The drafting unit, comprising twin-type delivery top rollers (3, 4) entwined by aprons (10, 11), wherein the aprons (10, 11) are passed around reversing members (9) which are attached to the component part (6, 7) joined to the twin-type delivery top roller (3, 4) on the area_facing away from the clamping surface of the twin-type delivery top rollers (3, 4), characterized in that the reversing members (9) are formed to an integral, rigid holder (8), the distance (a) between the twin-type delivery top rollers(3, 4) and the running faces (13) of the reversing members (9) being chosen such as to allow the aprons (10, 11) to bulge out between the top roller (3, 4) and the reversing member (9).
  4. The drafting unit according to claim 3, characterized in that the reversing members (9) have recessed running faces (12) for the aprons (10, 11).
  5. The drafting unit according to claim 3, characterized in that lateral guides (13, 14) for the aprons (10, 11) are provided.
  6. The drafting unit according to claim 5, characterized in that the lateral guides (13, 14) are disposed on either side of the running faces (12) of the reversing members (9).
  7. The drafting unit according to claim 3, characterized in that the holder (8) has at least one retaining member (15) adapted to be connected to the shaft (8) of the twin-type top roller (2).
  8. The drafting unit according to claim 7, characterized in that the holder (8) is adapted to bear on a stationary component part of the drafting unit in the sense of rotation of the top rollers (3, 4).
  9. The drafting unit according to claim 3, characterized in that said holder (8) is adapted to be attached to the control bar (7) of the twin-type top roller (2).
  10. The drafting unit according to claim 3, characterized in that the holder (8) is adapted to be attached to the upper roller supporting and weighting arm.
  11. The drafting unit according to claim 3, characterized in that the circumference of the aprons (10, 11) is at least 1½ times the circumference of the entwined upper rollers (3, 4) and the distance (a) between the running axis of the upper rollers and the running faces (12) or the reversing members (9), accordingly, corresponds at least to the diameter of the entwined upper rollers.
EP04790385A 2003-10-17 2004-10-14 Drawing frame with aprons entwined around twin output top delivery rollers Not-in-force EP1673497B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10348452A DE10348452B4 (en) 2003-10-17 2003-10-17 Drafting system with twin top rollers wrapped in aprons
PCT/EP2004/011522 WO2005038104A1 (en) 2003-10-17 2004-10-14 Drawing frame with aprons entwined around twin output top delivery rollers

Publications (2)

Publication Number Publication Date
EP1673497A1 EP1673497A1 (en) 2006-06-28
EP1673497B1 true EP1673497B1 (en) 2008-09-03

Family

ID=34442075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04790385A Not-in-force EP1673497B1 (en) 2003-10-17 2004-10-14 Drawing frame with aprons entwined around twin output top delivery rollers

Country Status (8)

Country Link
US (1) US7475531B2 (en)
EP (1) EP1673497B1 (en)
JP (1) JP4639193B2 (en)
CN (2) CN1906339A (en)
AT (1) ATE407240T1 (en)
DE (2) DE10348452B4 (en)
ES (1) ES2313088T3 (en)
WO (1) WO2005038104A1 (en)

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DE102006011128B4 (en) 2006-03-08 2016-04-28 Deutsche Institute für Textil- und Faserforschung Stuttgart Roll stretching device
DE102008010364A1 (en) 2008-02-18 2009-08-20 Spindelfabrik Suessen Gmbh Riemchenführungseinrichtung for a drafting top roller
WO2010016808A1 (en) * 2008-08-04 2010-02-11 Ozdilek Alisveris Merkezleri Ve Tekstil Sanayi Anonim Sirketi Compact yarn manufacturing system
WO2010114503A1 (en) 2009-03-31 2010-10-07 Ozdilek Alisveris Merkezleri Ve Tekstil Sanayi Anonim Sirketi In yarn production, apron cladding mechanism and method to the rollers coated with elastic material and found in the drafting and guding zone, having shift structure and pre-tensioning mechanism
CN101876110B (en) * 2010-07-30 2011-12-28 宁波民丰实业有限公司 Full carbon fiber top pin with plug-in tail structure and manufacturing method thereof
CH710141A1 (en) * 2014-09-23 2016-03-31 Rieter Ag Maschf Cage assembly with a guide element for a drafting arrangement of a textile machine.
DE102016210514B3 (en) * 2016-06-14 2017-08-24 Siemens Aktiengesellschaft Multi-part apron for a vehicle
CN114293291B (en) * 2021-12-31 2022-12-09 安徽兰翔智能制造有限公司 Weaving rubber ring subassembly convenient to change

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Also Published As

Publication number Publication date
EP1673497A1 (en) 2006-06-28
CN1906339A (en) 2007-01-31
CN103088483B (en) 2015-06-24
ES2313088T3 (en) 2009-03-01
DE10348452B4 (en) 2008-07-03
JP2007508472A (en) 2007-04-05
CN103088483A (en) 2013-05-08
DE502004007999D1 (en) 2008-10-16
US7475531B2 (en) 2009-01-13
ATE407240T1 (en) 2008-09-15
US20070169459A1 (en) 2007-07-26
WO2005038104A1 (en) 2005-04-28
DE10348452A1 (en) 2005-05-25
JP4639193B2 (en) 2011-02-23

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