EP2354070B1 - Tensionneur de fil - Google Patents

Tensionneur de fil Download PDF

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Publication number
EP2354070B1
EP2354070B1 EP20100000995 EP10000995A EP2354070B1 EP 2354070 B1 EP2354070 B1 EP 2354070B1 EP 20100000995 EP20100000995 EP 20100000995 EP 10000995 A EP10000995 A EP 10000995A EP 2354070 B1 EP2354070 B1 EP 2354070B1
Authority
EP
European Patent Office
Prior art keywords
yarn
tensioner
deflecting elements
spring leaves
spring
Prior art date
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Application number
EP20100000995
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German (de)
English (en)
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EP2354070A1 (fr
Inventor
Björn Halvarsson
Anders SVANSTRÖM
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Iro AB
Original Assignee
Iro AB
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Publication date
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Priority to EP20100000995 priority Critical patent/EP2354070B1/fr
Priority to CN 201110034641 priority patent/CN102152997B/zh
Publication of EP2354070A1 publication Critical patent/EP2354070A1/fr
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Publication of EP2354070B1 publication Critical patent/EP2354070B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B65H59/24—Surfaces movable automatically to compensate for variation in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/28—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged towards each other
    • B65H59/30—Surfaces movable automatically to compensate for variation in tension
    • 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
    • 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 yarn tensioner according to the preamble part of claim 1.
  • the yarn path is defined by four stationary rigid deflecting elements on one side of the yarn path and three rigid deflecting elements on the other side of the yarn path, such that the yarn path has a zigzag configuration.
  • the three deflecting elements at the other side of the yarn path commonly are adjustable perpendicular to the yarn run direction in order to vary the tensioning effect by changing the deflection angles around the deflecting elements.
  • the running yarn exclusively is braked by friction force depending on the total angle of deflection and the friction coefficient between the yarn and the deflecting elements.
  • the yarn tensioner has to generate a tension in the yarn which can be finely adjusted and which will be kept relatively constant at the set value.
  • EP 1 072 707 A discloses a similar yarn tensioner with seven deflecting elements in total and a linear motor for modulating the tensioning effect in order to achieve a predetermined variable tension course during an insertion cycle into a weaving machine.
  • the tensioning effect depends on the wrapping angles of the yarn around the deflecting elements and varies with an exponential function of the magnitudes of the wrapping angles. This allows to achieve relatively high yarn tension as is needed for heavy yarn qualities like e.g. synthetic yarns or ribbons for producing airbag fabrics.
  • a relatively high yarn tension with strong deflections of the yarn unavoidably results in drastic tension variations as soon as a knot, a snarl or an irregularity in the yarn passes the yarn tensioner. Then the yarn tensioner cannot regain the initial yarn tension setting rapidly enough, meaning that either a yarn breakage occurs or that the set yarn tension is lost for a long period of time.
  • WO 97/49850 A discloses a yarn tensioner in a controlled version having in the embodiment of Fig. 14 four yarn deflecting elements at one side of the yam and five yarn deflecting elements at the opposite side. Each yarn deflecting element has a planar surface.
  • the yarn path is lined between the two series of yarn alternatingly arranged deflecting elements by two spring leaves such that a yarn running through the yarn tensioner is clamped between the spring leaves by the forces imparted by the yarn deflecting elements.
  • the longitudinal extension of the spring leaves at least substantially corresponds to the longitudinal distance occupied by the series of yarn deflecting elements. Both spring leaves are loosely arranged between side brackets of the yarn tensioner. Each free end of a spring leaf only slightly protrudes beyond the first yarn deflecting element of the series of yarn deflecting elements with a short distance smaller than the distance between adjacent yarn deflecting elements at each side of the yarn.
  • JP 11/200195 A discloses a yarn tensioner having a single deflecting element at each side of the yarn path and a pair of planar rigid holding plates between the yarn path and the deflecting elements.
  • Round yarn eyelets are stationarily provided upstream of a V-shaped inlet region and downstream of a V-shaped outlet region of the yarn tensioner.
  • the free end of one holding plate is secured to a stationary mount in the inlet region, while an opposite free end of the other holding plate is secured at a stationary mount in the outlet region of the tensioner.
  • US 5,363,883 A and US 4,641688 A each disclose a yarn tensioner commonly called leaf tensioner.
  • the yarn tensioner has a pair of spring leaves each pivotally supported at an open inlet end of the yarn tensioner, both spring leaves being pressed resiliently against each other.
  • the yarn runs straight through the leaf tensioner and is clamped between the spring leaves.
  • the maximum yarn tension is relatively low and not sufficient for heavy yarn qualities.
  • the yarn tensioner does not tolerate a passing knot, a snarl or an irregularity easily but tends to cause a yarn breakage as the hard impact of a knot cannot spread the spring leafs apart rapidly enough.
  • EP 0 622 485 A discloses a leaf tensioner having a pair of spring leaves which are bent such that their convex sides abut each other. Both longitudinal ends of each spring leaf are captured in a socket.
  • the spring leaves In case of heavy yarn qualities needing a relatively high but constant yarn tension the spring leaves have to be pressed against each other very firmly, resulting in a tendency of the yarn tensioner to cause a yarn breakage upon occurrence of a knot, a snarl, or an irregularity in the yarn, because then the yarn tensioner does not yield.
  • US 2001/0022201 A discloses a yarn tensioner of a leaf tensioner type. Two spring leaves are pressed against each other with convexly bent clamping surfaces for the yarn passing the yarn tensioner. Although at least one longitudinal end of one spring leaf is free to flex, the yarn tensioner, in case of a setting for high tension, is unable to yield sufficiently easily in case of a passing knot.
  • EP 1 811 068 A discloses a yarn tensioner of a hybrid type operating with a flexible spring leaf fixed at both longitudinal ends and a rigid deflection element pressed with a flat braking surface against one side of the spring leaf. In case of a setting of the yarn tensioner for a strong tensioning effect the yarn tensioner is unable to yield upon passage of a knot.
  • EP 1 786 715 A discloses an e.g. controlled yarn tensioner either containing a pair of spring leaves which are locally pressed against each other or one spring leaf and a fixed stationary planar braking surface against which the spring leaf is pressed locally.
  • a stationary spring leaf is loaded perpendicular to the yarn run direction by a spring while the opposite spring leaf is resting locally on a stationary stop.
  • the yarn tensioner is designed, in particular, for heavy yarn qualities needing relatively high yarn tension when being processed, e.g.
  • the yarn tensioner is a combination of a deflection tensioner and leaf tensioner, meaning that the running yarn becomes deflected several times along the yarn path through the yarn tensioner and is clamped between spring leaves over a significant long extension of the yarn path.
  • the yarn tensioner allows to build up a relatively high resulting yarn tension although the specific tensioning load on a length unit of the yarn in the yarn path of the yarn tensioner remains relatively low.
  • the yarn tensioner is opened by the knot at the instant location of the knot only while the remaining part of the yarn tensioner is still tensioning the yarn.
  • the resistance for pulling the knot through the yarn tensioner remains desirably low, i.e., the knot passage occurs relatively smoothly and with a low tension peak in the yarn only.
  • the knot can displace either both leaves from each other except at the locations of the deflecting elements backing up the spring leaves, but also can displace one spring leaf away from the other at the locations of the deflecting elements.
  • the resulting yarn tension depends on several deflections of the spring leaves plus the clamping friction along the long clamping zone between the spring leaves.
  • the yarn tensioner according to the invention is particularly suitable for processing heavy yarn qualities which need relatively high yarn tension. This may be, for example, synthetic yarns or ribbons for producing airbag fabric or e.g.
  • more than one spring leaf could be provided per side of the yarn path, with the spring leaves having equal length or with each outer spring leaf being shorter than the innermost spring leaf at that side of the yarn path.
  • the two spring leaves at least in one of the inlet and outlet regions are left loose at their free ends to facilitate flexing of portions of the spring leaves between the longitudinal free ends and the respective first deflection element towards and away from each other.
  • the distance in yarn run direction between the longitudinal free ends of the spring leaves and the respective first deflecting element is larger than the interspaces between the deflecting elements.
  • This arrangement assures that a knot enters and leaves the yarn tensioner with a smooth rise and smooth drop of the yarn tension.
  • the portions of the spring leaves easily flex in the outlet region of the yarn tensioner while a knot is leaving the yarn tensioner and while the yarn remains tensioned along the remaining part of the yarn tensioner.
  • the spring leaves are held against movement in yarn run direction relative to the yarn deflecting elements such that the spring leaves do not change their relative position in yarn run direction at the deflecting elements, not even during a knot passage.
  • the yarn tensioner has, preferably, stationary holding elements co-acting with the longitudinal ends in the inlet region or the outlet region, more preferably, in the inlet region of the yarn tensioner.
  • the spring leaves should form funnel-shaped upstream and downstream inlet and outlet regions for easy entry and exit of knots.
  • the deflecting elements can be distributed arbitrarily along the extension of the part of the yarn path occupied by the deflecting elements, the deflecting elements preferably are arranged alternatingly on both sides of the yarn path, preferably even regularly, such that both spring leaves are deformed into a regular serpentine-like configuration or wavy profile.
  • the deflecting elements are deforming the spring leaves into a serpentine-line-shaped configuration.
  • An arrangement of the deflecting elements such that they deform the spring leaves results in a relatively long clamping zone formed between both spring leaves, meaning that during a knot passage other parts of the yarn will still be clamped and tensioned while the knot only locally spreads apart the spring leaves.
  • the series of deflecting elements comprises at least two deflecting elements at each side of the yarn path, preferably two at one side and three at the other side, all deflecting elements commonly supporting one pair of equally dimensioned spring leaves in-between them.
  • the deflecting elements are arranged in sockets of tensioner base parts.
  • at least one tensioner base part has a number of sockets larger than the number of deflecting elements provided at that side of the yarn path, the sockets being distributed in the tensioner base part in yarn run direction either regularly or irregularly.
  • the sockets allow to change the relative arrangement between the deflecting elements at both sides, to change the interspaces between the deflection elements, and/or to vary the number of deflecting elements per side of the yarn path, upon demand.
  • At least one tensioner base part has mounts for stationarily mounting the longitudinal free ends of the spring leaves.
  • the mounts preferably, are situated at the inlet region of the yarn tensioner and are spaced apart perpendicular to the yarn run direction further than the deflecting elements at both sides of the yarn path.
  • the mounts hold the spring leaves stationary in yarn run direction and relative to the deflecting elements such that the spring leaves may easily move on the deflecting elements during operation of the yarn tensioner.
  • the mounts keep the longitudinal free ends of the spring leaves spread apart for easy entry of a knot into the yarn tensioner.
  • an elastic spring leaf damper may be arranged at least in the vicinity of the outlet region, preferably at one tensioner base part.
  • the spring leaf damper may come into action with one spring leaf in order to suppress vibrations of the longitudinal free end of the spring leaf, particularly of the spring leaf which is supported on the respective second of the series of deflecting elements.
  • the elastic spring leaf damper is an option but not necessary.
  • one tensioner base part may be arranged adjustably substantially perpendicular to the yarn run direction in relation to the other tensioner base part.
  • the adjustably arranged tensioner base part may be connected to a manual and/or motorised setting drive or setting mechanism.
  • the series of deflecting elements may be defined by, preferably equally dimensioned, pins or tube sections each having a convex round spring leaf contact periphery.
  • the convex round periphery may be at least partly cylindrical such that theoretically each deflecting element is only in line contact with the spring leaf along a line which extends crosswise to the longitudinal direction of the spring leaf.
  • the deflecting element may be just snapped into the sockets or may be removably secured therein by fastening elements or may be glued in.
  • the spring leave longitudinal side edges may be laterally offset in relation to one another.
  • the yarn tensioner may be equipped with a cleaning device comprising at least one blowing nozzle for pressurised air directed substantially parallel to the spring leaf contact area against longitudinal side edges of the spring leaves for blowing in cleaning air, particularly after first the deflecting elements on both sides of the yarn path have been moved away from each other to open the yarn tensioner.
  • Part of the cleaning device may be a displacement drive or displacement mechanism for moving one spring leaf or one tensioner base part with the spring leaf sidewardly in relation to the yarn run direction and in relation to the other spring leaf into a temporary cleaning position.
  • the lateral offset between the spring leaves or the longitudinal side edges facilitates that air jets of the blowing nozzles impinging perpendicular to the yarn run direction on the longitudinal leaf edges spread the spring leaves apart, resulting in an efficient cleaning effect removing lint and other contamination immediately.
  • the blowing nozzle and optionally the displacement drive are connected with a cleaning control system, which, preferably, also is connected to the setting drive of the yarn tensioner for temporarily opening the yarn tensioner and displacing the spring leaves into the cleaning position for a cleaning cycle.
  • Cleaning cycles preferably, may be executed mainly while the yarn tensioner is not in operative condition, i.e. when the deflecting elements are spread apart to a certain extent.
  • the spring leaves are made of metal or plastics and extend over more than 200 mm in yarn run direction. Compared to conventional yarn tensioners this means of course an extreme longitudinal extension of the yarn tensioner. However, normally there is sufficient space in yarn run direction to install such a long yarn tensioner.
  • yarn eyelets upstream and/or downstream of the yarn tensioner, the yarn eyelets defining the yarn path during operation of the yarn tensioner. If those yarn eyelets are oval or oblong hole-like with a long oval main axis or hole main axis oriented substantially parallel to the contact plane between the spring leaves, the running yarn oscillates sidewardly in the yarn path which distributes wear evenly on the spring leaves.
  • Fig. 1 illustrates schematically an embodiment of a yarn tensioner T, particularly designed for processing heavy yarn qualities.
  • the yarn tensioner T is a sc-called heavy duty yarn tensioner intended for use e.g. in rapier weaving machines, projectile weaving machines, but also in other yarn processing machines e.g. operating with relatively constant yarn speed like winding machines or spooling machines, i.e. a yarn tensioner for applications where the running yarn needs relatively high yarn tension which remains as set relatively constant even in cases where unavoidably a knot, a snarl or a marked irregularity of the yarn passes the yarn tensioner T, and such that e.g. a knot passes smoothly without a harsh tension peak, without danger of a yarn breakage, and that the set yarn tension does not vary significantly during a knot passage and is regained immediately after the knot passage.
  • the yarn tensioner T in Fig. 1 is a combination of a deflection tensioner and a clamping or leaf tensioner and comprises a series of deflecting elements 1, 2 at both sides of a yarn path P of a yarn Y running in yarn run direction D.
  • deflecting elements 1, 2 are provided, namely three deflecting elements 1, 1 a to 1 c at one side and 2a, 2b at the other side of the yarn path P.
  • the deflecting elements 1, 2 e.g. are cylindrical or have at least convexly rounded contact peripheries with a generatrice extending perpendicular to the yarn run direction D.
  • the yarn path P is lined in the yarn tensioner T at both sides by a pair of planar, substantially parallel and flexible thin-walled spring leaves 8a, 8b.
  • the spring leaves 8a, 8b may have equal dimensions or different widths in width direction perpendicular to the yarn run direction D, such that even in operative condition of the yarn tensioner T longitudinal side edges (27, 28 in Fig. 4 ) of the spring leaves 8a, 8b are positioned at least at one side with a lateral offset between the longitudinal spring leave edges 27, 28 ( Fig. 4 ).
  • the spring leaves (8a, 8b) and/or even the base parts 4, 5 could be positioned with a lateral offset.
  • the deflecting elements 1, 2 are arranged such at both sides of the yarn path P and in relation to each other that the spring leaves 8a, 8b are deformed into a serpentine-like configuration.
  • the deflecting elements 1 may be distributed regularly with interspaces in-between.
  • the deflecting elements 2a, 2b are arranged with an interspace in-between and such that each is located about midway in the interspace of the deflecting elements 1 a to 1c.
  • Each deflecting element 1, 2 may be mounted in a socket 3 of one tensioner base part 4, 5.
  • the tensioner base part 4, 5 may have a larger number of regularly or irregularly distributed sockets 3 than the number of actually mounted deflecting elements 1, 2, allowing to change the position and interspacings of and between the deflecting elements in order to vary the tensioning performance of the yarn tensioner. As a minimum, there may be provided two deflecting elements 1 at one side and only a single deflecting element 2 at the other side of the yarn path P, or there may be provided more deflecting elements than shown and in another arrangement as shown.
  • the tensioner base part 4 may be arranged stationarily and fixed to a setting drive 6.
  • the tensioner base part 5 may be connected with the setting drive 6 such that it is movable substantially perpendicular to the yarn run direction D in the directions of a double arrow 5a, in order to vary the tensioning effect, by both the serpentine-like configuration of and the contact pressure between the spring leaves 8a, 8b.
  • the setting drive 6 may be a manually actuated setting drive mechanism for setting and varying a permanent tensioning value.
  • the setting can also be executed by a motorised setting drive 6.
  • the tensioning performance can be varied remotely controlled upon demand e.g. during an insertion cycle into a weaving machine in order to achieve a certain tension course during the insertion cycle, as is conventional in the case of projectile weaving machines or rapier weaving machines.
  • the setting drive 6 may be connected via cables 7 to a control unit (not shown).
  • the spring leaves 8a, 8b e.g. have equal dimensions, as mentioned above, and may be rectangular strips from spring steel or plastic material, and may thus have a longitudinal extension L longer than their width.
  • the longitudinal extension L may amount to more than 200 mm in yarn run direction D.
  • Fig. illustrates only a pair of spring leaves 8a, 8b, there may be provided instead more than two spring leaves, i.e. more than one spring leaf 8a, 8b per each side of the yarn path P. In the latter case the respective spring leaf placed at a respective outer side may be as long as the respective innermost spring leaf or even may be shorter. Even spring leaves 8a, 8b of differing widths may be combined.
  • the longitudinal extension L of the spring leaves 8a, 8b is markedly longer than the length occupied by the series of deflecting elements 1, 2.
  • Longitudinal free ends 11, 13 of the spring leaves 8a, 8b are bent outwardly in order to form funnel-shaped upstream and downstream inlet and outlet regions 9, 14.
  • the spring leaves 8a, 8b are secured stationary in yarn run direction D, e.g. on mounts 10, 12 of the tensioner base part 4, preferably at the inlet region 9, while the longitudinal free ends 13 in the outlet region 14 are left free to flex away from and towards each other.
  • Unsupported portions 17 of the spring leaves 8a, 8b, between the longitudinal free ends 11, 13 and the respective first deflecting element 1 a, 1 c are longer in yarn run direction D than the interspaces between the deflecting elements or, alternatively, are almost as long as the interspaces.
  • a spring leaf damper 18 adjacent to the longitudinal free end 13 of the spring leaf 8b which is first supported by the second deflecting element 2a, in order to suppress oscillations or vibrations of the longitudinal free end 13 of the lower spring 8b in the outlet region, e.g. during a knot passage.
  • the yarn path P of the yarn Y in the yarn tensioner may be defined by yarn eyelets 31 placed upstream and/or downstream.
  • those yarn eyelets 31 may be oval or oblong hole-shaped with an oval main axis or hole main axis 32 extending parallel to the contact plane between both spring leaves 8a, 8b, that the running yarn Y oscillates laterally and distributes wear laterally over the spring leaves 8a, 8b.
  • the deflecting elements 1, 2 may be mainly cylindrical pins or tube sections made from metal and/or plastic material, or are fixedly provided at or even integrated in the tensioner base parts 4, 5.
  • Fig. 2 indicates an operation condition of the yarn tensioner of Fig. 1 during a passage of a knot K contained in the yarn Y running in run direction D.
  • the knot K enters the inlet region 9 it easily spreads apart the unsupported portions of the spring leaves 8a, 8b until it reaches the location of the respective first deflecting element 1c. In this location the spring leaf 8a is backed-up by the deflecting element 1c.
  • the knot K then yieldably displaces the other spring leaf 8b in the direction of the arrow 15 so that the knot K easily and smoothly passes the deflecting element 1 c without a drastic tension peak.
  • the remaining part of the yarn Y is tensioned upstream and downstream of the location at the knot K between the spring leaves 8a, 8b which are pressed against each other by the deflecting elements 1, 2, and is also tensioned at the deflections at the other deflecting elements.
  • the knot K will yieldably displace the upper spring leaf 8a in the direction of the dotted arrow 16, with the same positive effects as mentioned above.
  • Fig. 3 illustrates an operation phase of the yarn tensioner of Figs 1 and 2 when a knot K is on the way to leave the yarn tensioner T.
  • the knot K has already passed the last deflecting element 1a and now spreads apart both spring leaves 8a, 8b in the portions 17 before the knot K easily will leave the yarn tensioner through the outlet region 13. Downstream of the current location of the knot K the yarn Y will remain tensioned by the clamping effect of the spring leaves 8a, 8b and the deflections around the deflecting elements 1, 2.
  • the spring leaf damper 18 which may be a pin having a rubber coating, may come into action in order to suppress undesired oscillations of the longitudinal free end 13 of the lower spring leaf 8b.
  • the leaf spring damper 18, however, is an optional equipment of the yarn tensioner only.
  • Fig. 4 illustrates the yarn tensioner T in a further embodiment where the yarn tensioner T is equipped with a cleaning device C for removing collected lint and other contamination, e.g. while the yarn tensioner is in a non-operative condition, i.e., when the deflecting elements 1, 2 have been moved away from each other by means of the setting drive 6 or another yarn tensioner opening mechanism (not shown).
  • a cleaning device C for removing collected lint and other contamination
  • the cleaning device C has at least one blowing nozzle 20 positioned, at least during a cleaning cycle, close to longitudinal side edges 27, 28 of the spring leaves 8a, 8b with blowing directions of jets 30 of pressurised air substantially parallel to the contact plane between both spring leaves 8a, 8b and against the longitudinal edges 27, 28.
  • Blowing nozzles 20 may even be placed at both longitudinal sides of the spring leaves 8a, 8b.
  • the blowing direction may be even be somewhat oblique in relation to the run direction D.
  • a displacement drive 21 as part of the cleaning device C may be used to sidewardly displace e.g. the upper spring leaf 8a in relation to the lower spring leaf 8b such that the longitudinal edges 27, 28 are laterally offset in relation to each other while the blowing nozzles 20 blow.
  • the displacing movement of the e.g. upper spring leaf 8a is indicated by an arrow 29.
  • the longitudinal spring leaf side edges 27, 28 may be laterally offset (measure X) also in the operative condition of the yarn tensioner T.
  • the offset facilitates that the jets 30 efficiently spread apart the spring leaves 8a, 8b and remove lint and other debris.
  • a cleaning control 22 e.g. with an actuator 23 for initiating a cleaning cycle (or a pre-programmed cleaning control system 22 for regularly or upon demand carrying out cleaning cycles).
  • the blowing nozzles 20 may be connected to a valve mechanism 24 and a pressure source 25 for pressurised air.
  • the valve mechanism 24 may be connected, as well as the displacement drive 21, if provided, to the cleaning control system 22 which, preferably, also could be connected (line 26) with the setting drive 6 such that for a cleaning cycle first the yarn tensioner T is opened by use of the setting drive 6, before or while the displacement drive 21 displaces the spring leaves 8a, 8b laterally in relation to each other and before or while the valve mechanism 24 supplies the blowing nozzles 20 with pressurised air.
  • the cleaning device C with or without a displacement drive 21, however, is an optional equipment of the yarn tensioner T. When the edges 27, 28 permanently are laterally offset to one another, cleaning as well may be possible by use of a handheld air nozzle.
  • a cotton yarn of the specification Ne16 is processed by the yarn tensioner T, a high yarn tension of about 100 cN is set, which also has to be kept substantially constant for a yarn speed up to about 500 m/min.
  • the set yarn tension will also be maintained substantially constant during a knot passage. Even the set yarn tension is relatively high, the mechanical tensioning load on the yarn Y per length unit remains relatively moderate, as the yarn tensioner T is acting on the yarn over an extremely long distance and by combined clamping and deflecting effects.

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  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (16)

  1. Tendeur de fil de trame (T) pour un fil courant (Y), en particulier un fil de trame lourd de qualité robuste, comprenant une série d'au moins trois éléments rigides de déviation du fil de trame (1, 2) définissant en commun un trajet du fil (P) à travers le tendeur de fil de trame (T), les éléments de déviation du fil de trame étant distribués dans la direction (D) du trajet du fil à l'état espacé les uns des autres tout en étant disposés sur les deux côtés opposés du trajet du fil (P) de telle sorte qu'un élément de déviation de fil de trame respectif est situé d'un côté en étant décalé, dans la direction du trajet du fil (T) par rapport à un élément adjacent de déviation du fil de trame situé sur le côté opposé du trajet du fil (P), au moins un élément de déviation du fil de trame pouvant être soumis à un réglage manuel et/ou motorisé en position essentiellement perpendiculaire au trajet du fil par rapport à un autre situé sur le côté opposé du trajet du fil afin de faire varier l'effet de mise sous tension à l'état de travail du tendeur de fil de trame, caractérisé en ce que le trajet du fil (P) est bordé, entre les éléments de déviation de fil de trame (1), par au moins une paire de lames de ressort flexibles, planes et parallèles, à parois minces (8a, 8b), en ce que les lames de ressort (8a, 8b) sont mises en état de contrainte l'une vers l'autre via les éléments de déviation (1) de telle sorte qu'une lame de ressort respective (8a) est supportée à un endroit du trajet du fil (P) à un élément de déviation (1), tandis que l'autre lame de ressort (8b) est libre, au même endroit, pour faire ressort essentiellement perpendiculairement à la direction de trajet du fil de trame (D) et à l'écart de la première lame de ressort, en ce que les lames de ressort (8a, 8b) sont notablement plus longues dans la direction du trajet du fil de trame (D) que la distance occupée par la série d'éléments de déviation de fil de trame (1, 2), la distance des extrémités libres longitudinales (11, 13) des lames de ressort (8a, 8b), dans la direction du trajet du fil de trame (D), par rapport au premier élément de déviation de fil de trame respectif (1a, 1c) parmi la série d'éléments de déviation de fil de trame étant supérieure à la distance s'étendant entre des éléments adjacents de déviation de fil de trame (1, 2), et en ce que les lames de ressort (8a, 8b) de la paire au moins dans une des zones comprenant la zone d'entrée et la région de zone (9, 14) ne sont pas mises sous tension pour faciliter le fléchissement de portions (17) des deux lames de ressort (8a, 8b) en direction et à l'écart l'une de l'autre, les portions (17) s'étendant entre les extrémités libres longitudinales (11, 13) et le premier élément de dérivation respectif (1a) de la série d'éléments de déviation (1, 2).
  2. Tendeur de fil de trame selon la revendication 1, caractérisé en ce qu'on empêche les mouvements des lames de ressort (8a, 8b) dans la direction de trajet du fil de trame (D) par rapport à la série d'éléments de déviation de fil de trame (1), via des éléments de montage stationnaires (1) qui agissent de manière conjointe avec les extrémités libres longitudinales dans la zone d'entrée (9) ou dans la zone de sortie (14) du tendeur de fil de trame (T).
  3. Tendeur de fil de trame selon la revendication 1, caractérisé en ce que les éléments de déviation (1, 2) sont disposés en alternance des deux côtés du trajet du fil (P), de préférence de manière régulière.
  4. Tendeur de fil de trame selon la revendication 1, caractérisé en ce que, à l'état actif du tendeur de fil de trame (T), les éléments de déviation (1) déforment les lames de ressort (8a, 8b) en une configuration en forme de serpentin linéaire.
  5. Tendeur de fil de trame selon la revendication 1, caractérisé en ce que la série d'éléments de déviation (1) comprend au moins deux éléments de déviation (1a à 1c, 2a, 2b) de chaque côté du trajet du fil (P), de préférence deux d'un côté et trois de l'autre côté pour supporter une paire de lames de ressort (8a, 8b) essentiellement de dimension égale bordant le trajet du fil (P) du côté interne des éléments de déviation de fil de trame.
  6. Tendeur de fil de trame selon au moins une des revendications précédentes, caractérisé en ce que les éléments de déviation (1, 2) respectivement sont disposés dans des douilles (3) de deux parties de base du tendeur (4, 5), et en ce qu'au moins une partie de base (4, 5) du tendeur possède un nombre de douilles (3) supérieur au nombre d'éléments de déviation prévus sur le côté respectif du trajet du fil (P), les douilles 3 étant distribué dans la direction (D) de trajet du fil ou bien de manière irrégulière dans les parties de base (4, 5) du tendeur.
  7. Tendeur de fil de trame selon la revendication 6, caractérisé en ce qu'au moins une partie de base (4) du tendeur possède des éléments de montage (10, 12) pour le montage stationnaire de l'extrémité libre longitudinale respective (11) d'une des lames de ressort (8a, 8b), de préférence dans la zone d'entrée (9), l'écartement des éléments de montage perpendiculairement au trajet du fil (P) étant supérieur à l'écartement des éléments de déviation (1, 2) des deux côtés du trajet du fil (P).
  8. Tendeur de fil de trame selon au moins une des revendications précédentes, caractérisé en ce que le dispositif d'amortissement élastique (18) de lame de ressort est disposé dans la zone de sortie (14) en coopération fonctionnelle avec au moins une lame de ressort (8b), le dispositif d'amortissement de lame de ressort (18) étant de préférence disposé dans une partie de base (4) du tendeur.
  9. Tendeur de fil de trame selon la revendication 6, caractérisé en ce qu'une partie de base (5) est arrangée pour pouvoir être réglée en position essentiellement perpendiculaire à la direction de trajet du fil (D) par rapport à l'autre partie de base (4) du tendeur, et en ce que la première partie de base (5) du tendeur est reliée à un dispositif de réglage manuel et/ou motorisé (6).
  10. Tendeur de fil de trame selon au moins une des revendications précédentes, caractérisé en ce que la série d'éléments de déviation (1) est définie par des goupilles ou des tronçons tubulaires, de préférence de dimensions égales, chacun possédant une périphérie de contact arrondie convexe avec la lame de ressort.
  11. Tendeur de fil de trame selon la revendication 1, caractérisé en ce que les lames de ressort (8a, 8b) présentent des largeurs différentes dans la direction de la largeur perpendiculaire à la direction du trajet du fil (D) ou bien présentent des largeurs essentiellement égales tout en étant disposées en décalage relatif l'une par rapport à l'autre dans la direction de largeur perpendiculaire à la direction du trajet du fil (D), respectivement, de telle sorte qu'à l'état actif du tendeur de fil de trame (T), au moins d'un côté du tendeur de fil de trame (T), les bords latéraux longitudinaux (27, 28) des lames de ressort (8a, 8b) sont disposés en décalage latéral l'un par rapport à l'autre.
  12. Tendeur de fil de trame selon au moins une des revendications 1 à 10, caractérisé en ce qu'au moins une lame de ressort (8a) ou une partie de base (4) du tendeur est arrangée pour pouvoir se déplacer au moins en partie en direction latérale pour prendre une position de nettoyage et par rapport à la direction du trajet du fil (D) pour obtenir un décalage latéral entre les bords latéraux longitudinaux (27, 28) des lames de ressort (8a, 8b), de préférence de manière manuelle ou bien via un entraînement de déplacement (21) faisant partie du dispositif de nettoyage (C).
  13. Tendeur de fil de trame selon la revendication 11 ou 12, caractérisé en ce que le tendeur de fil de trame (T) est équipé d'un dispositif de nettoyage (C) comprenant au moins une buse de soufflage (20) orientée essentiellement parallèlement aux lames de ressort (8a, 8b) contre les bords latéraux longitudinaux (27, 28) lames de ressort (8a, 8b), décalés en direction latérale.
  14. Tendeur de fil de trame selon la revendication 13, caractérisé en ce qu'au moins la buse de soufflage (20) est raccordée à un système de commande de nettoyage (22), ledit système de commande de nettoyage (22) étant de préférence également raccordé à l'entraînement de réglage (6) du tendeur de fil de trame (T) pour ouvrir temporairement le tendeur de fil de trame au cours d'un cycle de nettoyage.
  15. Tendeur de fil de trame selon la revendication 1, caractérisé en ce que les lames de ressort (8a, 8b) sont réalisées en métal et/ou en matière plastique et s'étendent sur plus de 200 mm dans la direction de trajet du fil (D).
  16. Tendeur de fil de trame selon au moins une des revendications précédentes, caractérisé en ce qu'au moins un oeillet de fil de trame (31) est disposé en amont et/ou en aval du tendeur de fil de trame (T), le grand axe principal (23) de l'ovale ou du trou étant orienté essentiellement parallèlement à la zone de contact entre les lames de ressort (8a, 8b).
EP20100000995 2010-02-01 2010-02-01 Tensionneur de fil Active EP2354070B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20100000995 EP2354070B1 (fr) 2010-02-01 2010-02-01 Tensionneur de fil
CN 201110034641 CN102152997B (zh) 2010-02-01 2011-01-30 纱线张紧器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100000995 EP2354070B1 (fr) 2010-02-01 2010-02-01 Tensionneur de fil

Publications (2)

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EP2354070A1 EP2354070A1 (fr) 2011-08-10
EP2354070B1 true EP2354070B1 (fr) 2013-01-02

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20120478A1 (it) * 2012-03-27 2013-09-28 Savio Macchine Tessili Spa Dispositivo tendifilo dei filati in avvolgimento
CN106087208B (zh) * 2016-08-31 2018-02-06 江苏恒神股份有限公司 碳纤维织造用具有展纤功能周向退绕储纬器
WO2019032007A1 (fr) 2017-08-08 2019-02-14 Iro Aktiebolag Frein de fil réglable
CN110713077B (zh) * 2019-09-28 2021-11-02 湖州晨宇家居用品有限公司 大圆机纱线输送张力调节机构

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US4324371A (en) * 1980-11-03 1982-04-13 Oda Gosen Kogyo Kabushiki Kaisha Apparatus for controlling tension of filament yarn
DE3446567C1 (de) 1984-12-20 1986-05-07 Lindauer Dornier Gmbh, 8990 Lindau Schussfadenbremse mit stufenweise steuerbarer Bremswirkung
CH670116A5 (fr) 1986-04-28 1989-05-12 Univ Kazakhsky
DE59105505D1 (de) * 1990-09-10 1995-06-22 Rueti Ag Maschf Fadenbremse für Webmaschinen.
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BE1010389A3 (nl) 1996-06-26 1998-07-07 Picanol Nv Draadrem voor het remmen van een inslagdraad bij een weefmachine.
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IT1308066B1 (it) 1999-06-01 2001-11-29 Lgl Electronics Spa Dispositivo di comando di frenatrama, particolarmente per telaidi tessitura e simili
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CN102152997B (zh) 2013-01-09
CN102152997A (zh) 2011-08-17
EP2354070A1 (fr) 2011-08-10

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