EP1673497A1 - Drawing frame with aprons entwined around twin output top delivery rollers - Google Patents

Drawing frame with aprons entwined around twin output top delivery rollers

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Publication number
EP1673497A1
EP1673497A1 EP04790385A EP04790385A EP1673497A1 EP 1673497 A1 EP1673497 A1 EP 1673497A1 EP 04790385 A EP04790385 A EP 04790385A EP 04790385 A EP04790385 A EP 04790385A EP 1673497 A1 EP1673497 A1 EP 1673497A1
Authority
EP
European Patent Office
Prior art keywords
straps
rollers
drafting system
aprons
twin
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
EP04790385A
Other languages
German (de)
French (fr)
Other versions
EP1673497B1 (en
Inventor
Stefan Krawietz
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.)
Deutsche Institute fuer Textil und Faserforschung Stuttgart
Original Assignee
INST TEXTILCHEMIE und CHEMIEFA
Deutsche Institute fuer Textil und Faserforschung Stuttgart
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 INST TEXTILCHEMIE und CHEMIEFA, Deutsche Institute fuer Textil und Faserforschung Stuttgart filed Critical INST TEXTILCHEMIE und CHEMIEFA
Publication of EP1673497A1 publication Critical patent/EP1673497A1/en
Application granted granted Critical
Publication of EP1673497B1 publication Critical patent/EP1673497B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 straps wrapped twin exit top rollers, in which the straps are guided around deflection elements which are arranged on the area facing away from the clamping surface of the pair of exit rollers.
  • the drafting roller pairs therefore consist of a lower corrugated steel roller, the so-called lower roller, and an upper roller, the so-called upper roller, which is pressed onto the lower roller by a loading device.
  • this top roller has an elastic covering so that no clamping line is created, but rather a clamping surface due to the deformation of the elastic covering, which results in a significantly better fiber retention.
  • a good clamping effect is exerted on the fiber structure without damaging the fibers.
  • soft roller coverings result in better warping results, since the softer the covering, the larger the clamping surface.
  • the soft roller coverings have the disadvantage that they wear out very quickly and have to be reground. This changes the geometry of the drafting roller and thus also the properties of the covering, which in turn has a disadvantageous effect on the draft conditions and thus on the yarn quality.
  • the regrinding of the roller 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 effort is given.
  • the distance between the top output rollers and the running surfaces of the deflection elements is selected such that the straps can bulge in the areas between the top roller and the deflection element due to the attempt to assume an approximately circular shape in the circumferential direction. You are then only with little pressure on the deflection and stand accordingly only under low tension. You therefore experience practically no braking, do not consume any noticeable drive energy and are practically not subject to wear.
  • the low contact pressure of the straps on the deflection elements can be achieved if the diameter of the desired circular shape is approximately V / 2 to 3 times the circumference of the wrapped top rollers and the distance between the wrapped top rollers and the deflection elements is half to twice the diameter of the wrapped top rollers equivalent.
  • the two deflection members of a twin top roller can be formed on a one-piece, rigid holder, which is attached to a component connected to the twin top roller - advantageously detachably -.
  • the holder may have a bondable with the axis of Zwilüngsoberwalze 'holding member or be attachable to the handlebar of the Zwilüngsoberwalze or at Oberwalzentrag- and loading.
  • Contact surfaces are provided for the lateral guidance of the straps.
  • FIG. 1 shows the front view of a drafting system in a first embodiment of the invention in section in plane AA;
  • Fig. 2 is a side view of the subject of Fig. 1; 3 shows a further possibility for fastening a holder in a front view; 4 shows the side view of the object of FIG. 3.
  • the invention is based on a drafting system of common design with a steel output lower roller 1 which runs over the length of the machine and on which top twin rollers 2 rest, of which only one is shown here in the front view of FIG.
  • the two top rollers 3 and 4 of the top roller twins have a preferably soft coating 5 in order to achieve the advantageous drafting conditions described at the beginning. They are connected by a shaft 6 which is clipped onto a spring-loaded link 7.
  • the link 7 is arranged on a top roller support and loading arm, not shown.
  • one-piece holders 8, preferably made of injection molding, are provided, from which two deflection members 9 protrude laterally, run over the straps 10, 11, which also loop around the upper rollers 3 and 4.
  • These deflection elements 9 have recessed running surfaces 12 which are delimited by frets 13 and 14 and thus prevent the straps from running sideways from the upper rollers 3 and 4 when the drafting system runs.
  • the straps For the desired mode of operation of the straps, it is sufficient if they have a circumference which corresponds to approximately 1/2 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 deflection elements 9 then corresponds approximately to the diameter of the top rollers.
  • the circumference of the straps can, however, be increased to approximately three times the circumference of the top rollers or in some cases even further, in which case the distance a - shown in FIG. 3 - between the axis of rotation of the top rollers and the running surfaces 12 of the deflection elements 9 is at least approximately would be to increase twice the diameter of the top rollers. It goes without saying that the distance a is in a corresponding relationship to the circumference and also to the stiffness the straps 10, 11 must stand. The distance a should be reduced for stiffer straps.
  • the holders 8 of the embodiment of FIGS. 1 and 2 have two holding members 15, which can be clipped onto the shaft 6 of the associated top roller twin 2 and guide the holders.
  • a device can be easily removed from a handlebar 7 when an exchange of the top rollers 3, 4 or the straps 10, 11 is required.
  • the shaft 6 is clipped down out of the handlebar and the holding members 15 are swung forward from the shaft.
  • the holders 8 endeavor to rotate clockwise with the top rollers 3, 4 in the side view of FIG.
  • systems are provided which can be formed in the simplest form by the upper sides of the links 7, on which the middle area 16 of the holder 8 lies.
  • the holders 8 can be clipped onto the handlebars 7 by means of resilient clamps 17 which are connected to the holder.
  • the holders 8 are already held in a rotationally fixed manner.
  • the holder 8 can also be articulated on the upper roller support and loading arms. In this case, they can, for example, be inserted into the holders of the upper cleaning rollers, which are generally no longer required when using the wrapping straps.
  • the straps 10, 11 preferably consist of at least two layers, of which the outer layer, which comes into contact with the fibers, is adapted to the requirements of good fiber clamping and low wear, the inner layer, which runs over the running surfaces 12 of the deflection elements 9, is adapted to the need for low-friction operation is.

Landscapes

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

Streckwerk mit von Riemchen umschlungenen Zwillings-AusgangsoberwalzenDrafting unit with twin exit top rollers wrapped in straps
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 straps wrapped twin exit top rollers, in which the straps are guided around deflection elements which are arranged on the area facing away from the clamping surface of the pair of exit rollers.
Beim Verzug von Faserbändern 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 Klemmiinie 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 Streckwerks- walze 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 strips in drafting systems, the clamping effect of the roller pairs plays a decisive role in transferring the drafting forces to the fiber structure. The drafting roller pairs therefore consist of a lower corrugated steel roller, the so-called lower roller, and an upper roller, the so-called upper roller, which is pressed onto the lower roller by a loading device. As a rule, this top roller has an elastic covering so that no clamping line is created, but rather a clamping surface due to the deformation of the elastic covering, which results in a significantly better fiber retention. A good clamping effect is exerted on the fiber structure without damaging the fibers. Experience has shown that soft roller coverings result in better warping results, since the softer the covering, the larger the clamping surface. However, the soft roller coverings have the disadvantage that they wear out very quickly and have to be reground. This changes the geometry of the drafting roller and thus also the properties of the covering, which in turn has a disadvantageous effect on the draft conditions and thus on the yarn quality. The regrinding of the roller 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 high softness of a roller covering with high wear resistance and thus optimal warping conditions over a long period of use achieve, it is proposed in the unpublished DE 102 60 025.2 to have a top roller with a soft covering loop through a strap with high wear resistance. This separate strap has the advantage of being easy to replace when worn or damaged. It is also easily possible to replace the straps with 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 schnei! laufen und die den größten Einfluss auf einen zuverlässigen Verzug haben.It is obvious that this solution is particularly advantageous on the pair of output rollers of a drafting system, where the rollers cut particularly well! run and that have the greatest influence on a reliable delay.
Es ist bekannt (DE 816 069; DE-GM R 7 vom 1 . 10. 1949), 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.It is known (DE 816 069; DE-GM R 7 dated 10/1/1949) to wrap the top rollers of drafting systems with straps. The stated purpose of these rather long straps is to prevent the formation of coils around the top rollers of the pair of output rollers. These straps are assigned tensioning devices which keep them under tension and thus taut.
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 via stationary deflection elements. It has been shown that the pulling of the straps over these deflection elements consumes drive energy, the straps experience braking which has a disadvantageous effect on the warping process and are subject to wear. It is therefore an object of the invention to avoid these disadvantages. You solved this task by the features mentioned in the characterizing part 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 tensile stress in the straps as low as possible, 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 effort is given. The distance between the top output rollers and the running surfaces of the deflection elements is selected such that the straps can bulge in the areas between the top roller and the deflection element due to the attempt to assume an approximately circular shape in the circumferential direction. You are then only with little pressure on the deflection and stand accordingly only under low tension. You therefore experience practically no braking, do not consume any noticeable drive energy and are practically not subject to wear.
Begünstigt wird diese Wirkung noch, wenn der Reibungsbeiwert zwischen der inneren, der Laufschicht der Riemchen und den Umlenkorganen durch entsprechende Matehaipaarung möglichst gering gehalten wird.This effect is further promoted if the coefficient of friction between the inner, the running layer of the straps and the deflection elements is kept as low as possible by means of appropriate mat hair pairing.
Der geringe Anlagedruck der Riemchen an den Umlenkorganen kann dann erreicht werden, wenn der Durchmesser der anstrebten Kreisform etwa dem V/2 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 deflection elements can be achieved if the diameter of the desired circular shape is approximately V / 2 to 3 times the circumference of the wrapped top rollers and the distance between the wrapped top rollers and the deflection elements is half to twice the diameter of the wrapped top rollers equivalent.
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 Zwilüngsoberwalze verbindbares' Halteglied aufweisen oder am Lenker der Zwilüngsoberwalze oder am Oberwalzentrag- und Belastungsarm befestigbar sein.In this case, the two deflection members of a twin top roller can be formed on a one-piece, rigid holder, which is attached to a component connected to the twin top roller - advantageously detachably -. The holder may have a bondable with the axis of Zwilüngsoberwalze 'holding member or be attachable to the handlebar of the Zwilüngsoberwalze or at Oberwalzentrag- and loading.
Zum seitlichen Führen der Riemchen sind Anlaufflächen vorgesehen.Contact surfaces are provided for the lateral guidance of the straps.
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. 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.Two preferred exemplary embodiments of the invention are shown in the figures of the drawing. 1 shows the front view of a drafting system in a first embodiment of the invention in section in plane AA; Fig. 2 is a side view of the subject of Fig. 1; 3 shows a further possibility for fastening a holder in a front view; 4 shows the side view of the object of FIG. 3. The invention is based on a drafting system of common design with a steel output lower roller 1 which runs over the length of the machine and on which top twin rollers 2 rest, of which only one is shown here in the front view of FIG. The two top rollers 3 and 4 of the top roller twins have a preferably soft coating 5 in order to achieve the advantageous drafting conditions described at the beginning. They are connected by a shaft 6 which is clipped onto a spring-loaded link 7. The link 7 is arranged on a top roller support 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, one-piece holders 8, preferably made of injection molding, are provided, from which two deflection members 9 protrude laterally, run over the straps 10, 11, which also loop around the upper rollers 3 and 4. These deflection elements 9 have recessed running surfaces 12 which are delimited by frets 13 and 14 and thus prevent the straps from running sideways from the upper rollers 3 and 4 when the drafting system runs.
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 can be seen from the bulging of the straps 10, 11 in FIG. 2 between the upper rollers 3, 4 and the deflection elements 9, these are only loosely placed around the deflection elements and are therefore only under the low tension which is caused solely by the striving of the straps to take a circular shape in the circumferential direction.
Für die angestrebte Wirkungsweise der Riemchen genügt es bereits, wenn sie einen Umfang aufweisen, der etwa dem 1 /2fachen 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 mode of operation of the straps, it is sufficient if they have a circumference which corresponds to approximately 1/2 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 deflection elements 9 then corresponds approximately to the diameter of the top rollers. The circumference of the straps can, however, be increased to approximately three times the circumference of the top rollers or in some cases even further, in which case the distance a - shown in FIG. 3 - between the axis of rotation of the top rollers and the running surfaces 12 of the deflection elements 9 is at least approximately would be to increase twice the diameter of the top rollers. It goes without saying that the distance a is in a corresponding relationship to the circumference and also to the stiffness the straps 10, 11 must stand. The distance a should be reduced for stiffer straps.
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 holders 8 of the embodiment of FIGS. 1 and 2 have two holding members 15, which can be clipped onto the shaft 6 of the associated top roller twin 2 and guide the holders. A device can be easily removed from a handlebar 7 when an exchange of the top rollers 3, 4 or the straps 10, 11 is required. For this purpose, the shaft 6 is clipped down out of the handlebar and the holding members 15 are swung forward from the shaft. When the drafting system runs, the holders 8 endeavor to rotate clockwise with the top rollers 3, 4 in the side view of FIG. In order to prevent this, systems are provided which can be formed in the simplest form by the upper sides of the links 7, on which the middle area 16 of the holder 8 lies.
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 FIGS. 3 and 4, the holders 8 can be clipped onto the handlebars 7 by means of resilient clamps 17 which are connected to the holder. Here, the holders 8 are already held in a rotationally fixed manner.
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 more detail, the holder 8 can also be articulated on the upper roller support and loading arms. In this case, they can, for example, be inserted into the holders of the upper cleaning rollers, which are generally no longer required when using the wrapping 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. BezugszahlenlisteThe straps 10, 11 preferably consist of at least two layers, of which the outer layer, which comes into contact with the fibers, is adapted to the requirements of good fiber clamping and low wear, the inner layer, which runs over the running surfaces 12 of the deflection elements 9, is adapted to the need for low-friction operation is. LIST OF REFERENCE NUMBERS
1 Ausgangsunterwalze 2 Oberwalzenzwilling 3 Oberwalze 4 Oberwalze 5 Belag der Oberwalzen 3, 4 6 Welle des Oberwalzenzwillings 2 7 Lenker 8 Halter 9 Umlenkorgan am Halter 8 10 Riemchen 11 Riemchen 12 Halteglieder am Halter 8 13 Lauffläche des Umlenkorgans 9 14 Bund am Halter 8 15 Bund am Halter 8 16 Mittlerer Bereich des Halters 8 17 Klammer 1 output lower roller 2 upper roller twin 3 upper roller 4 upper roller 5 covering of the upper rollers 3, 4 6 shaft of the upper roller twin 2 7 link 8 holder 9 deflection element on the holder 8 10 straps 11 straps 12 holding elements on the holder 8 13 running surface of the deflection element 9 14 collar on the holder 8 15 fret on holder 8 16 Middle area of holder 8 17 clip

Claims

Patentansprüche claims
1. Verfahren zum Führen von die Zwillings-Ausgangsoberwalzen von Streckwerken umschlingenden Riemchen, wobei die Riemchen um Umlenkorgane geführt sind, die auf dem der Klemmfiäche des Ausgangswalzenpaäres abgekehrten Bereich angeordnet sind, dadurch gekennzeichnet, dass die Riemchen im wesentlichen nur derjenigen geringen Zugspannung unterworfen werden, die durch ihr Bestreben verursacht wird, in Umfangsrichtung annähernd Kreisform anzunehmen.1. A method for guiding straps wrapping around the twin top rollers of drafting systems, the straps being guided around deflection elements which are arranged on the area facing away from the clamping surface of the pair of exit rollers, characterized in that the straps are essentially only subjected to that low tensile stress, which is caused by its endeavor to assume an approximately circular shape in the circumferential direction.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Abstand zwischen den Ausgangsoberwalzen und den Laufflächen der Umlenkorgane so gewählt ist, dass die Zugspannung in den Riemchen nur durch deren Bestreben verursacht wird, in Umfangsrichtung annähernd Kreisform anzunehmen.2. The method according to claim 1, characterized in that the distance between the output top rollers and the running surfaces of the deflection members is selected so that the tension in the straps is caused only by their efforts to assume approximately circular shape in the circumferential direction.
3. Streckwerk mit von Riemchen umschlungenen Zwillings-Ausgangsoberwalzen, wobei die Riemchen um Umlenkorgane geführt sind, die auf dem der Klemmfläche des Ausgangswalzenpaares abgekehrten Bereich angeordnet sind, dadurch gekennzeichnet, dass die beiden Umlenkorgane (9) einer Zwilüngsoberwalze (2) an einem einstückigen, starren Halter (8) angeformt sind, der an einem mit der Zwilüngsoberwalze verbundenen Bauteil (6, 7) lösbar befestigt ist.3. Drafting device with twin exit top rollers wrapped around by straps, the straps being guided around deflection elements which are arranged on the area facing away from the clamping surface of the pair of exit rollers, characterized in that the two deflection elements (9) of a twin top roller (2) on a one-piece, Rigid holder (8) are integrally formed, which is releasably attached to a component (6, 7) connected to the twin upper roller.
4. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass die Umlenkorgane (9) eingetiefte Laufflächen (12) für die Riemchen (10, 11) aufweisen.4. drafting system according to claim 3, characterized in that the deflecting members (9) have recessed treads (12) for the straps (10, 11).
5. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass seitliche Führungen (13, 14) für die Riemchen (10, 1 1) vorgesehen sind. 5. drafting system according to claim 3, characterized in that lateral guides (13, 14) for the straps (10, 1 1) are provided.
6. Streckwerk nach Anspruch 5, dadurch gekennzeichnet, dass die seitlichen Führungen (13, 14) zu beiden Seiten der Laufflächen (12) der Umlenkorgane (9) angeordnet sind.6. drafting system according to claim 5, characterized in that the lateral guides (13, 14) on both sides of the treads (12) of the deflection members (9) are arranged.
7. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass der Halter (8) mindestens ein mit der Welle (6) der Zwilüngsoberwalze (2) verbindbares Halteglied (15) aufweist.7. drafting system according to claim 3, characterized in that the holder (8) has at least one with the shaft (6) of the twin top roller (2) connectable holding member (15).
8. Streckwerk nach Anspruch 7, dadurch gekennzeichnet, dass der Halter (8) im Drehsinn der Oberwalzen (3, 4) sich an einen ortsfesten Bauteil des Streckwerkes anlegen kann.8. drafting system according to claim 7, characterized in that the holder (8) in the direction of rotation of the upper rollers (3, 4) can lay against a stationary component of the drafting system.
9. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass der Halter (8) am Lenker (7) der Zwillingsoberwalze (2) befestigbar ist.9. drafting system according to claim 3, characterized in that the holder (8) on the handlebar (7) of the twin top roller (2) can be fastened.
10.. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass der Halter (8) am Oberwalzen-Trag- und Belastungsarm befestigbar ist.10 .. drafting system according to claim 3, characterized in that the holder (8) on the upper roller support and loading arm can be fastened.
11. Streckwerk nach Anspruch 3, dadurch gekennzeichnet, dass der Umfang der Riemchen (10, 11) mindestens das 11/2fache des Umfangs der umschlungenen Oberwalzen (3, 4) und der Abstand (a) zwischen der Laufachse der Oberwalzen und den Laufflächen (12) der Umlenkorgane (9) entsprechend mindestens dem Durchmesser der umschlungenen Oberwalzen entspricht. 11. The drafting device according to claim 3, characterized in that the circumference of the aprons (10, 11) is at least 1 1/2 times the circumference of the entwined upper rollers (3, 4) and the distance (a) between the running axis of the upper rollers and the track surfaces (12) of the deflection elements (9) corresponds at least to the diameter of the wrapped top 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 true EP1673497A1 (en) 2006-06-28
EP1673497B1 EP1673497B1 (en) 2008-09-03

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

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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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Also Published As

Publication number Publication date
CN1906339A (en) 2007-01-31
CN103088483B (en) 2015-06-24
ATE407240T1 (en) 2008-09-15
JP4639193B2 (en) 2011-02-23
JP2007508472A (en) 2007-04-05
WO2005038104A1 (en) 2005-04-28
ES2313088T3 (en) 2009-03-01
CN103088483A (en) 2013-05-08
EP1673497B1 (en) 2008-09-03
DE10348452B4 (en) 2008-07-03
DE502004007999D1 (en) 2008-10-16
US7475531B2 (en) 2009-01-13
DE10348452A1 (en) 2005-05-25
US20070169459A1 (en) 2007-07-26

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