WO1995021786A1 - Device for adjusting the tension of a thread - Google Patents

Device for adjusting the tension of a thread Download PDF

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Publication number
WO1995021786A1
WO1995021786A1 PCT/FR1995/000154 FR9500154W WO9521786A1 WO 1995021786 A1 WO1995021786 A1 WO 1995021786A1 FR 9500154 W FR9500154 W FR 9500154W WO 9521786 A1 WO9521786 A1 WO 9521786A1
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WO
WIPO (PCT)
Prior art keywords
oscillating body
tension
thread
lever
torque
Prior art date
Application number
PCT/FR1995/000154
Other languages
French (fr)
Inventor
Olivier Dreville
Original Assignee
Olivier Dreville
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 Olivier Dreville filed Critical Olivier Dreville
Priority to AU17118/95A priority Critical patent/AU1711895A/en
Publication of WO1995021786A1 publication Critical patent/WO1995021786A1/en

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Classifications

    • 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to the general technical field of the textile industry and it relates, more particularly, to a mechanical device suitable for ensuring automatic adjustment of the tension of a thread used, in particular, in machines of the textile industry.
  • the object of the invention finds a particularly advantageous application for equipping, in particular, industrial rectilinear textile knitting machines or creels for warping.
  • one of the problems to be solved is that aiming at ensuring a regular tension of the yarn by means of a braking mechanism, so as to obtain a knitted article having predetermined characteristics.
  • the need therefore appears to have suitable means for ensuring a substantially constant tension in the wire, whatever the different tensile forces to which it is subjected, occasioned by the variable linear speed of the wire and its coefficient of slip through the mechanism. braking.
  • French patents FR 915 401 and US-A-3,206,138 thus describe an automatic thread tension adjustment device intended to act on a thread braking mechanism.
  • the braking mechanism consists of a pair of cups between which passes the wire whose tension is to be adjusted.
  • One of the cups is biased by a spring, the action of which is controlled by the automatic adjustment device.
  • the adjustment device comprises a member sensitive to the tension of the thread and an oscillating body whose movement is a function of that of the sensitive member.
  • the regulating device also comprises an assembly for transforming the movement of the oscillating body into a movement for biasing the braking mechanism, so that an increase or a decrease of the tension of the thread, applied to the sensitive member, leads respectively to a reduction or an increase in the braking force exerted by the braking mechanism.
  • the assembly for transforming the movement of the oscillating body consists of a quick-pitch nut.
  • Patent US-A-3,372,888 has proposed another mechanical solution for ensuring automatic regulation of the tension of a thread. This patent thus describes a braking device comprising two cups between which is interposed a member for adjusting their spacing, the position of which is a function of that occupied by a member sensitive to the tension of the thread.
  • patent CH-12 160174 describes a system comprising, on the one hand, a braking mechanism with two cups between which the wire passes and, on the other hand, electromagnetic means adapted to allow the variation of the pressure exerted by the cups on the wire.
  • the action of the electromagnetic means is controlled by means of a switch, the opening or closing of which is caused by the friction of a wire on a guide element forming part of the switch.
  • Patent FR-1,544,469 describes a device of the pneumatic type with membranes controlling the bringing together or the spacing of the two cups of the tensioner.
  • US-A-2,554,493 describes an adjustment device comprising an oscillating body equipped, on the one hand, with a lever sensitive to the tension of the thread and, on the other hand, with a spiral spring creating a return force to that generated by the wire on the lever.
  • the sensitive lever is subjected to a torque which, respectively, increases or decreases.
  • the assembly for transforming the movement of the oscillating body is constituted by a cam and ball system.
  • Such a device has the same drawbacks known, namely a lack of sensitivity and an inadequacy to be able to regulate the thread tension as well as possible. Indeed, it must be considered that the lever is subjected, under the effect of the spiral spring, to a restoring torque, the variation of which is contrary to the tension of the wire, which opposes the action of the braking mechanism. . Indeed, the torque exerted by the lever increases, while the action of the braking cups decreases and, conversely. Such a device does not make it possible to adapt to the profile of the tension of the thread and consequently, to ensure constant tension of the thread.
  • the object of the invention therefore aims to propose a mechanical device for automatically adjusting the tension of a thread suitable for satisfying the need expressed above.
  • the automatic adjustment device according to the invention acts on the wire braking mechanism and comprises:
  • an oscillating body equipped with a member sensitive to the tension of the wire and adapted to create a return torque to the torque generated by the tension of the wire, - and an assembly for transforming the movement of the oscillating body into a movement for biasing the mechanism braking, so that an increase or decrease in the tension of the wire applied to the sensitive member respectively leads to a decrease or an increase in the braking force exerted by the braking mechanism.
  • the oscillating body is equipped with a counterweight adapted to create a couple antagonistic to the restoring torque, so that the sensitive member is subjected to a resulting torque varying non-linearly as a function of the angular displacement of the oscillating body.
  • the sensitive member and the counterweight are adapted to allow the values of the resulting torque to be varied non-linearly.
  • the fig. 1 is a perspective view showing an embodiment of an automatic adjustment device according to the invention.
  • the fîg. 2 and 3 are views in longitudinal section of the device illustrated in FIG. 1 and placed in two characteristic positions.
  • the figs. 4 and 5 are cross-sectional views taken respectively along lines IV-IV and V-V of the fig. 2 and showing characteristic details of the invention.
  • the fig. 6 is a cross-sectional view taken substantially along the lines VI-VI of the fig. 3 and showing a characteristic of the invention.
  • the fig. 7 is a diagram illustrating the variation of the torque applied to the sensitive member, with respect to its position.
  • the fig. 8 is a sectional elevation, similar to FIG. 2 and illustrating a characteristic detail of the invention.
  • the device 1 according to the invention is intended to automatically adjust the tension of a thread 2 intended to be absorbed by a textile machine 3, represented only by a part of its frame 3,.
  • the regulating device 1 is intended to act on a mechanism 4 for braking the wire 2.
  • the braking mechanism 4 consists of a pair of cups 5 1? 5 2 between which the wire 2 passes, the tension of which is to be adjusted.
  • the cups 5 oriental5 2 are mounted on a support shaft 6 fixed to the frame 3 j of the machine 3.
  • the cups 5 ,, 5 2 are biased by a spring 9 on which the regulating device 1 according to the invention acts.
  • the adjustment device 1 comprises an oscillating body 11 formed to delimit a central support 12 provided, on either side of its transverse faces 12 ls 12 2 , with an annular skirt 13.
  • the oscillating body 11 is angularly wedged with a member 15 sensitive to the tension of the wire 2.
  • the sensitive member 15 consists of a dynamometric lever exerting a return torque to the torque generated by the tension of the thread.
  • the lever 15 consists of two arms 16j and 16 2 , one of their common end supports a pin 17 on which is mounted a pulley 18 in permanent contact with the wire 2.
  • the pulley 18 is placed downstream of the braking mechanism 4, in the direction of travel of the wire, considered in the direction of the arrow fj on the fig. 1.
  • One of the arms, for example 16 2 , of the lever is equipped with a counterweight 19 mounted to be moved in sliding along the arm, in order to adjust the initial tension of the wire 2.
  • the ends of the arms 16 criz16 2 opposite those carrying the axis 17 are each shaped to present a fork 20 intended to be engaged by elastic deformation in an annular groove 21 formed on the oscillating body 11.
  • the lever 15 is fixedly anchored to the oscillating body 11 using, for example, forks 20 which each come to bear, at their ends, on the oscillating body 11.
  • the oscillating body 11 is associated with a counterweight 22 arranged so as to create a couple antagonistic to the couple of lever return, so that the latter is subjected to a resulting torque varying non-linearly as a function of the position of the oscillating body 11.
  • the counterweight 22 is fixedly mounted on the oscillating body 11, in order to compensate for the weight of the dynamometric lever 15. The distribution of the masses of the oscillating assembly formed by the body 11, the lever 15 and the counterweight 22, is thus made so that the torque exerted on the lever, therefore the force on the pulley 18, therefore the tension on the wire, increase in the example illustrated, as the lever 15 descends.
  • the regulating device 1 also comprises an assembly 24 for transforming the movement of the oscillating body 11 into a movement for biasing the braking mechanism 4, so that an increase or a decrease in the tension of the wire 2, applied to the sensitive member, leads respectively to a decrease or an increase in the braking force exerted by the mechanism 4.
  • the transformation assembly 24 comprises at least one and , in the example illustrated, a first 25 and a second 26 cam and roller systems.
  • each system 25, 26 comprises a support ring 27, 28 mounted on either side of the central support 12.
  • Each support ring 27, 28 has a transverse face 27 ,, 28, placed vis-à-vis respectively of the transverse face 12 ,, 12 2 of the support and equipped with at least one and, preferably, three rollers 29 each mounted on a radial axis 30.
  • the rollers 29 are offset from each other by 120 ° along a circumference of the rings.
  • the rollers 29 are mounted inside an annular groove 31 formed from the faces 27, 28, of the rings and leaving, on either side, an annular ring 32 for mounting the axes. 30.
  • each roller 29 is intended to cooperate with a cam 33 arranged on the transverse faces 12, and 12 2 of the central support 12.
  • Each face 12 ,, 12 2 of the support 12 has three cams offset by 120 ° along a circumference by presenting each a rolling surface extending substantially in a radial plane.
  • the support ring 27 is mounted so as to be in contact with the spring 9 by its transverse face 27 2 opposite its face 27,.
  • the support rings 27, 28 are fixed angularly on a support axis 34 by means, in the example illustrated, of a ball 35 engaged in an axial groove 36 formed on a support axis 34.
  • the support ring 28 is held in the axial position by means of a locking member 38 which, in the example illustrated, consists of a nut provided with an operating wheel 39 and screwed onto the support axis 34.
  • the locking member 38 makes it possible to axially move the assembly formed by the rings 27, 28 and the oscillating body 11, thus allowing adjustment of the force exerted by the spring 9 on the braking mechanism 4.
  • the support ring 27 and the oscillating body 11 are mounted free in axial movement on the support axis 34.
  • the device according to the invention preferably comprises a member 40 for limiting the oscillation of the body 11 within a predetermined angular range.
  • the member 40 consists of a stud 41 anchored on the support ring 28 and engaged in a groove 42 produced on the oscillating body 11, on a circular section adapted to allow an oscillation of the oscillating body 11 according to an angular range, for example of the order of 60 °.
  • the center of mass of the counterweight 22 and the point of application of the tension of the wire on the lever 15, namely the pulley 18, are placed in two opposite quadrants by forming a given angular offset ⁇ .
  • the lever 15 and the counterweight 22 are offset between them by an angle ⁇ of a value of the order of 195 °.
  • the lever 15 defines with the vertical axis an angle ⁇ of the order of 75 °, while the counterweight 22 makes an angle of 60 ° with the vertical axis.
  • the rollers 29 are placed in the lowest rolling part of the cams 33 (fig. 3).
  • the lever 15 makes an angle ⁇ of 15 °, while the counterweight is then established substantially vertically.
  • the rollers 29 are then located on the highest part of the cams 33.
  • the dynamometric lever 15 which bears on the wire 2, exerts by its own weight a given tension tending to cause it to descend downwards by driving the wire 2.
  • the tension given to the wire by the tightening exerted by the braking cups 5 ,, 5 2 is reinforced by the friction caused by the variable linear speed of the wire 2. This tension can be accentuated by the more or less high coefficient of sliding of the wire. If the tension of the thread 2 decreases, in relation to a constant x predetermined by the positioning of the masses of the oscillating assembly 11-15-22, the dynamometric lever 15 descends, causing a concomitant rotation of the body 11 and, consequently, a rise in the counterweight 22, so that the opposing torque decreases.
  • the oscillating assembly 11-15-22 is adapted so that the torque created by it can balance it permanently, regardless of its position, with respect to the force generated by the constant tension of a thread.
  • the force generated by the constant tension of the wire is that which exists due to the traction of the two strands of the wire extending on either side of the pulley 18, this force being modulated as a function of the angle formed between said strands of the wire.
  • the device according to the invention makes it possible to obtain automatic regulation of the tension of a thread 2.
  • the device according to the invention has the advantage of having great sensitivity and reliability while by presenting a relatively low cost price.
  • the device according to the invention offers the advantage of having a high efficiency by the implementation of at least one set of three rollers and cams making it possible to obtain an axial thrust between the support ring or rings and the oscillating body. .
  • the use of an oscillating assembly 11-15-22 makes it possible to exert, on the lever 15, a resulting torque which decreases or increases, while the action of the braking cups, respectively, decreases or increases, so that the action of the oscillating crew in no way counteracts the action of the braking mechanism.
  • a counterweight 22 makes it possible to have a torque of high value, intended to be used for tensioning the thread 2. It should be noted that the value of the torque of the lever is maximum in the low position of the latter, that is to say when the angle formed between the strands of the wire, which extend on either side of the pulley 18, has the lowest value. It should be understood, moreover, that the use of a counterweight 22 creates a torque opposing the restoring torque exerted by the lever, so that the lever is subjected to a resulting torque varying linearly as a function of the displacement angle of the oscillating body.
  • - Kc coefficient dependent on the position of the center of mass of the counterweight 22, and on the value of the equivalent mass
  • - ⁇ the angle of phase shift relative to the center of rotation of the oscillating body, of the lever and of the counterweight, namely 15 ° in the example illustrated.
  • the lever 15 and the counterweight 22 are adapted to make it possible to vary, in a non-linear manner, the values of the resulting torque.
  • Such a possibility offers the advantage of being able to take into account, in particular, the different types or sizes of son used.
  • the values of the resulting torque applied to the lever can thus be adjusted non-linearly as a function of the angle taken by the lever.
  • the variation of the values of the resulting torque applied to the lever can be obtained by adjusting the angular offset ⁇ between the lever 15 and the counterweight 22.
  • it can be provided to mount, for example, the lever 15 and / or the counterweight 22 angularly adjustable on the body 11.
  • Fig. 8 illustrates an exemplary embodiment of a counterweight 22 provided with means adapted to modify the position of its center of mass, in order to adjust the values of the resulting torque.
  • the counterweight 22 is produced in the form of a support arm 50 extending from the oscillating body 11 and delimiting, on either side of a central partition 51, a housing 52 closed by a cover 53.
  • Each housing 52 is intended to contain a counterweight 54 having, for example, a semi-disc shape, each counterweight 54, which is held by ribs 55 carried by the covers, can be moved in rotation around an axis parallel to the axis of rotation of the body 11, by means of the associated covers.
  • the independent displacement of the two weights 54 makes it possible to place in a precise position, inscribed inside a circle containing the envelope for moving the weights, the center of mass resulting from the counterweight 22.
  • the center of mass of the counterweight 22 can thus be moved towards or away from its axis of rotation and / or be angularly offset relative to the lever 15. Such an arrangement thus makes it possible to modify the angular offset ⁇ between the lever 15 and the counterweight 22.
  • the angular adjustment of the position of the counterweights 54 makes it possible to adjust the position of the center of mass of the counterweight 22 and, consequently, to determine and choose a form of torque C ,, C 2 to be applied for various types of known wires .
  • the device according to the invention by implementing two assemblies 25, 26 for transforming the movement of the oscillating body 11, makes it possible to double the adjustment range of the spring 9.
  • the body 11 is mounted axially fixed or free in axial displacement to allow adjustment of its axial position.
  • the oscillating body 11 would be mounted to act directly on the spring 9, while the support ring 25 would be mounted fixed axially or, as illustrated, free in axial movement to ensure an initial adjustment of the tension of the spring 9.
  • a protective flange 43 crossed at its middle by the spring 9 and making it possible to avoid the introduction of foreign bodies inside, in particular, of the assembly for transforming the movement of the oscillating body.
  • the support axis 34 comprises means 44 for removable mounting on the shaft 6 supporting the cups.
  • the support axis 34 is provided with a thread 44 ensuring its screwing on the threaded shaft 6.
  • the device according to the invention can be mounted in a reversible manner on the braking mechanisms 4. The only modification relates to the position of the groove 42 limiting the oscillation of the body 11, which must be arranged in a symmetrical position with respect to the vertical. It should also be noted that the distribution of the loads of the lever and the counterweight on the body 11 is determined to allow an action of gravity.
  • the device according to the invention is implemented using a device 46 for securing the wire 2, placed between the cups 5,, 5 2 and the pulley 18.
  • the securing device 46 is constituted by a pulley making it possible to change the angle of attack of the lever 15 relative to the wire 2, thus promoting the raising of the lever 15.
  • the object of the invention finds a particularly advantageous application for equipping, in particular, industrial rectilinear textile knitting machines or creels for warping.

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  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

Device for automatically adjusting the tension of a thread (2), said device acting on a thread-braking mechanism (4) and comprising: an oscillating body (11) including a lever (15) responsive to the tension of the thread (2) and adapted to provide a torque for restoring the torque produced by the tension of the thread. The device of the invention also includes an assembly (24) for converting the movement of the oscillating body (11) into a movement for urging the braking mechanism (4), so that an increased or reduced tension of the thread applied to the responsive member results in a reduced or increased braking force of the braking mechanism. According to the invention, the oscillating body (11) includes a counterweight (22) adapted to provide a torque which opposes the restoring torque, so that the responsive member is subjected to a resulting torque varying non-linearly in relation to the angular displacement of the oscillating body.

Description

DISPOSITIF DE REGULATION DE LA TENSION D'UN FILTHREAD TENSION REGULATING DEVICE
DOMAINE TECHNIQUE :TECHNICAL AREA :
La présente invention concerne le domaine technique général de l'industrie textile et elle vise, plus particulièrement, un dispositif mécanique adapté pour assurer le réglage automatique de la tension d'un fil utilisé, en particulier, dans les machines de l'industrie textile.The present invention relates to the general technical field of the textile industry and it relates, more particularly, to a mechanical device suitable for ensuring automatic adjustment of the tension of a thread used, in particular, in machines of the textile industry.
L'objet de l'invention trouve une application particulièrement avantageuse pour équiper, notamment, les machines textiles à tricoter rectilignes industrielles ou les cantres pour ourdissage.The object of the invention finds a particularly advantageous application for equipping, in particular, industrial rectilinear textile knitting machines or creels for warping.
Dans le domaine technique ci-dessus, l'un des problèmes à régler est celui visant à assurer une tension régulière du fil à l'aide d'un mécanisme de freinage, de manière à obtenir un article tricoté présentant des caractéristiques prédéterminées. Il apparaît donc le besoin de disposer de moyens adaptés pour assurer une tension sensiblement constante au fil, quels que soient les différents efforts de traction auxquels il est soumis, occasionnés par la vitesse linéaire variable du fil et de son coefficient de glissement à travers le mécanisme de freinage.In the above technical field, one of the problems to be solved is that aiming at ensuring a regular tension of the yarn by means of a braking mechanism, so as to obtain a knitted article having predetermined characteristics. The need therefore appears to have suitable means for ensuring a substantially constant tension in the wire, whatever the different tensile forces to which it is subjected, occasioned by the variable linear speed of the wire and its coefficient of slip through the mechanism. braking.
TECHNIQUE ANTERIEURE : De nombreuses solutions techniques ont été développées pour tenter de proposer des systèmes de régulation automatique de la tension d'un fil.PRIOR ART: Many technical solutions have been developed in an attempt to propose systems for automatic regulation of the tension of a thread.
Les brevets français FR 915 401 et US-A-3 206 138 décrivent ainsi un dispositif de réglage automatique de la tension d'un fil destiné à agir sur un mécanisme de freinage du fil. Le mécanisme de freinage est constitué d'une paire de coupelles entre lesquelles passe le fil dont la tension est à régler. L'une des coupelles est sollicitée par un ressort dont l'action est pilotée par le dispositif de réglage automatique. Le dispositif de réglage comporte un organe sensible à la tension du fil et un corps oscillant dont le mouvement est fonction de celui de l'organe sensible. Le dispositif de régulation comporte, également, un ensemble de transformation du mouvement du corps oscillant en un mouvement de sollicitation du mécanisme de freinage, de telle manière qu'une augmentation ou une diminution de la tension du fil, appliquée à l'organe sensible, conduise respectivement à une diminution ou à un accroissement de la force de freinage exercée par le mécanisme de freinage. L'ensemble de transformation du mouvement du corps oscillant est constitué par un écrou à pas rapide. Le brevet US-A-3 372 888 a proposé une autre solution mécanique pour assurer une régulation automatique de la tension d'un fil. Ce brevet décrit ainsi un dispositif de freinage comportant deux coupelles entre lesquelles est interposé un organe de réglage de leur écartement, dont la position est fonction de celle occupée par un organe sensible à la tension du fil. II est connu, également, dans l'état de la technique, des dispositifs de régulations du type électrique. Ainsi, par exemple, le brevet CH-12 160174 décrit un système comportant, d'une part, un mécanisme de freinage à deux coupelles entre lesquelles passe le fil et, d'autre part, des moyens électromagnétiques adaptés pour permettre de faire varier la pression exercée par les coupelles sur le fil. L'action des moyens électromagnétiques est commandée par l'intermédiaire d'un interrupteur dont l'ouverture ou la fermeture est provoquée par le frottement d'un fil sur un élément guide faisant partie de l'interrupteur.French patents FR 915 401 and US-A-3,206,138 thus describe an automatic thread tension adjustment device intended to act on a thread braking mechanism. The braking mechanism consists of a pair of cups between which passes the wire whose tension is to be adjusted. One of the cups is biased by a spring, the action of which is controlled by the automatic adjustment device. The adjustment device comprises a member sensitive to the tension of the thread and an oscillating body whose movement is a function of that of the sensitive member. The regulating device also comprises an assembly for transforming the movement of the oscillating body into a movement for biasing the braking mechanism, so that an increase or a decrease of the tension of the thread, applied to the sensitive member, leads respectively to a reduction or an increase in the braking force exerted by the braking mechanism. The assembly for transforming the movement of the oscillating body consists of a quick-pitch nut. Patent US-A-3,372,888 has proposed another mechanical solution for ensuring automatic regulation of the tension of a thread. This patent thus describes a braking device comprising two cups between which is interposed a member for adjusting their spacing, the position of which is a function of that occupied by a member sensitive to the tension of the thread. It is also known, in the state of the art, of electrical type regulation devices. Thus, for example, patent CH-12 160174 describes a system comprising, on the one hand, a braking mechanism with two cups between which the wire passes and, on the other hand, electromagnetic means adapted to allow the variation of the pressure exerted by the cups on the wire. The action of the electromagnetic means is controlled by means of a switch, the opening or closing of which is caused by the friction of a wire on a guide element forming part of the switch.
Le brevet FR-1 544 469 fait état d'un dispositif du type pneumatique à membranes commandant le rapprochement ou l'écartement des deux coupelles du tendeur.Patent FR-1,544,469 describes a device of the pneumatic type with membranes controlling the bringing together or the spacing of the two cups of the tensioner.
Si les différents dispositifs ci-dessus répondent théoriquement au problème posé, il apparaît que leur mise en oeuvre pratique ne donne pas satisfaction en pratique en raison de leur manque de fiabilité ou de sensibilité, de leur coût prohibitif et de leur difficulté de montage sur les machines existantes. Dans le même sens, le brevet US-A-2 554 493 décrit un dispositif de réglage comportant un corps oscillant équipé, d'une part, d'un levier sensible à la tension du fil et, d'autre part, d'un ressort spirale créant une force de rappel à celle engendrée par le fil sur le levier. Lorsque la tension du fil augmente ou diminue, le levier sensible est soumis à un couple qui, respectivement, augmente ou diminue. L'ensemble de transformation du mouvement du corps oscillant est constitué par un système à came et à billes. Un tel dispositif présente les mêmes inconvénients connus, à savoir un manque de sensibilité et une inadaptation à pouvoir réguler au mieux la tension du fil. En effet, il doit être considéré que le levier est soumis, sous l'effet du ressort spirale, à un couple de rappel dont la variation est contraire à la tension du fil, ce qui s'oppose à l'action du mécanisme de freinage. En effet, le couple exercé par le levier augmente, alors que l'action des coupelles de freinage diminue et, inversement. Un tel dispositif ne permet pas de s'adapter au profil de la tension du fil et par suite, d'assurer une tension constante du fil.If the various devices above theoretically respond to the problem posed, it appears that their practical implementation is not satisfactory in practice because of their lack of reliability or sensitivity, their prohibitive cost and their difficulty of mounting on the existing machines. In the same direction, US-A-2,554,493 describes an adjustment device comprising an oscillating body equipped, on the one hand, with a lever sensitive to the tension of the thread and, on the other hand, with a spiral spring creating a return force to that generated by the wire on the lever. When the thread tension increases or decreases, the sensitive lever is subjected to a torque which, respectively, increases or decreases. The assembly for transforming the movement of the oscillating body is constituted by a cam and ball system. Such a device has the same drawbacks known, namely a lack of sensitivity and an inadequacy to be able to regulate the thread tension as well as possible. Indeed, it must be considered that the lever is subjected, under the effect of the spiral spring, to a restoring torque, the variation of which is contrary to the tension of the wire, which opposes the action of the braking mechanism. . Indeed, the torque exerted by the lever increases, while the action of the braking cups decreases and, conversely. Such a device does not make it possible to adapt to the profile of the tension of the thread and consequently, to ensure constant tension of the thread.
Il apparaît donc le besoin de pouvoir disposer d'un dispositif de régulation automatique de la tension d'un fil, assurant une tension du fil à une valeur sensiblement constante, quelles que soient les sollicitations exercées sur le fil et les irrégularités présentées par ce dernier, le dispositif étant conçu, par ailleurs, pour permettre son adaptation simple sur la plupart des machines intéressées sans en affecter le fonctionnement ou le rendement.The need therefore appears to be able to have an automatic regulation device for the tension of a thread, ensuring a tension of the thread at a substantially constant value, whatever the stresses exerted on the thread and the irregularities presented by the latter. , the device being designed, moreover, to allow its simple adaptation on most of the machines concerned without affecting its operation or performance.
EXPOSE DE L'INVENTION :PRESENTATION OF THE INVENTION:
L'objet de l'invention vise donc à proposer un dispositif mécanique de réglage automatique de la tension d'un fil adapté pour satisfaire le besoin exprimé ci-dessus. Pour atteindre les objectifs ci-dessus, le dispositif de réglage automatique conforme à l'invention agit sur le mécanisme de freinage du fil et comporte :The object of the invention therefore aims to propose a mechanical device for automatically adjusting the tension of a thread suitable for satisfying the need expressed above. To achieve the above objectives, the automatic adjustment device according to the invention acts on the wire braking mechanism and comprises:
- un corps oscillant équipé d'un organe sensible à la tension du fil et adapté pour créer un couple de rappel au couple engendré par la tension du fil, - et un ensemble de transformation du mouvement du corps oscillant en un mouvement de sollicitation du mécanisme de freinage, de telle manière qu'une augmentation ou une diminution de la tension du fil appliqué à l'organe sensible conduise respectivement à une diminution ou à un accroissement de la force de freinage exercée par le mécanisme de freinage.- an oscillating body equipped with a member sensitive to the tension of the wire and adapted to create a return torque to the torque generated by the tension of the wire, - and an assembly for transforming the movement of the oscillating body into a movement for biasing the mechanism braking, so that an increase or decrease in the tension of the wire applied to the sensitive member respectively leads to a decrease or an increase in the braking force exerted by the braking mechanism.
Selon une caractéristique avantageuse de l'invention, le corps oscillant est équipé d'un contrepoids adapté pour créer un couple antagoniste au couple de rappel, de sorte que l'organe sensible soit soumis à un couple résultant variant de façon non linéaire en fonction du déplacement angulaire du corps oscillant.According to an advantageous characteristic of the invention, the oscillating body is equipped with a counterweight adapted to create a couple antagonistic to the restoring torque, so that the sensitive member is subjected to a resulting torque varying non-linearly as a function of the angular displacement of the oscillating body.
Selon une autre caractéristique avantageuse de l'invention, l'organe sensible et le contrepoids sont adaptés pour permettre de faire varier de façon non linéaire, les valeurs du couple résultant.According to another advantageous characteristic of the invention, the sensitive member and the counterweight are adapted to allow the values of the resulting torque to be varied non-linearly.
Une telle disposition permet de changer les paramètres du couple en adaptant au mieux le couple exercé par le dispositif de réglage à celui provoqué par la tension du fil qui dépend, notamment, de sa nature et de sa grosseur. Diverses autres caractéristiques ressortent de la description faite ci- dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation et de mise en oeuvre de l'objet de l'invention.Such an arrangement makes it possible to change the parameters of the torque by optimally adapting the torque exerted by the adjustment device to that caused by the tension of the thread which depends, in particular, on its nature and its size. Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting examples, embodiments and implementation of the subject of the invention.
BREVE DESCRIPTION DES DESSINS :BRIEF DESCRIPTION OF THE DRAWINGS:
La fïg. 1 est une vue en perspective montrant un exemple de réalisation d'un dispositif de réglage automatique conforme à l'invention.The fig. 1 is a perspective view showing an embodiment of an automatic adjustment device according to the invention.
Les fîg. 2 et 3 sont des vues en coupe longitudinale du dispositif illustré à la fïg. 1 et placé dans deux positions caractéristiques. Les fïg. 4 et 5 sont des vues en coupe transversale prises respectivement selon les lignes IV-IV et V-V de la fïg. 2 et montrant des détails caractéristiques de l'invention.The fîg. 2 and 3 are views in longitudinal section of the device illustrated in FIG. 1 and placed in two characteristic positions. The figs. 4 and 5 are cross-sectional views taken respectively along lines IV-IV and V-V of the fig. 2 and showing characteristic details of the invention.
La fïg. 6 est une vue en coupe transversale prise sensiblement selon les lignes VI- VI de la fïg. 3 et montrant une caractéristique de l'invention. La fïg. 7 est un diagramme illustrant la variation du couple appliqué à l'organe sensible, par rapport à sa position.The fig. 6 is a cross-sectional view taken substantially along the lines VI-VI of the fig. 3 and showing a characteristic of the invention. The fig. 7 is a diagram illustrating the variation of the torque applied to the sensitive member, with respect to its position.
La fïg. 8 est une coupe-élévation, analogue à la fïg. 2 et illustrant un détail caractéristique de l'invention. MEILLEURE MANIERE DE REALISER L'INVENTION :The fig. 8 is a sectional elevation, similar to FIG. 2 and illustrating a characteristic detail of the invention. BEST WAY TO IMPLEMENT THE INVENTION:
Tel que cela ressort, plus précisément, aux fig. 1 à 3, le dispositif 1 selon l'invention est destiné à assurer le réglage automatique de la tension d'un fil 2 destiné à être absorbé par une machine textile 3, représentée uniquement par une partie de son bâti 3,. Le dispositif de régulation 1 est destiné à agir sur un mécanisme 4 de freinage du fil 2. De préférence, le mécanisme de freinage 4 est constitué d'une paire de coupelles 51? 52 entre lesquelles passe le fil 2 dont la tension est à régler. Les coupelles 5„ 52 sont montées sur un arbre support 6 fixé au bâti 3j de la machine 3. Les coupelles 5,, 52 sont sollicitées par un ressort 9 sur lequel agit le dispositif de régulation 1 selon l'invention.As can be seen, more precisely, in FIGS. 1 to 3, the device 1 according to the invention is intended to automatically adjust the tension of a thread 2 intended to be absorbed by a textile machine 3, represented only by a part of its frame 3,. The regulating device 1 is intended to act on a mechanism 4 for braking the wire 2. Preferably, the braking mechanism 4 consists of a pair of cups 5 1? 5 2 between which the wire 2 passes, the tension of which is to be adjusted. The cups 5 „5 2 are mounted on a support shaft 6 fixed to the frame 3 j of the machine 3. The cups 5 ,, 5 2 are biased by a spring 9 on which the regulating device 1 according to the invention acts.
Tel que cela ressort plus précisément aux fig. 1 et 2, le dispositif de réglage 1 comporte un corps oscillant 11 formé pour délimiter un support central 12 pourvu, de part et d'autre de ses faces transversales 12ls 122, d'une jupe annulaire 13. Le corps oscillant 11 est calé angulairement avec un organe 15 sensible à la tension du fil 2. Dans l'exemple illustré, l'organe sensible 15 est constitué d'un levier dynamométrique exerçant un couple de rappel au couple engendré par la tension du fil. Tel qu'illustré sur les dessins, le levier 15 est constitué de deux bras 16j et 162, dont une de leur extrémité commune supporte un axe 17 sur lequel est montée une poulie 18 en contact permanent avec le fil 2. La poulie 18 est placée en aval du mécanisme de freinage 4, dans le sens de défilement du fil, considéré dans le sens de la flèche fj sur la fïg. 1. L'un des bras, par exemple 162, du levier est équipé une masselotte 19 montée pour être déplacée en coulissement le long du bras, en vue de régler la tension initiale du fil 2. Les extrémités des bras 16„ 162 opposées de celles portant l'axe 17 sont conformées chacune pour présenter une fourche 20 destinée à être engagée par déformation élastique dans une rainure annulaire 21 ménagée sur le corps oscillant 11. Le levier 15 est ancré fixement au corps oscillant 11 à l'aide, par exemple, des fourches 20 qui viennent en appui chacune, par leurs extrémités, sur le corps oscillant 11. Selon une caractéristique de l'invention, le corps oscillant 11 est associé à un contrepoids 22 disposé de manière à créer un couple antagoniste au couple de rappel du levier, de sorte que ce dernier soit soumis à un couple résultant variant de façon non linéaire en fonction de la position du corps oscillant 11. Le contrepoids 22 est monté fixement sur le corps oscillant 11, afin de compenser le poids du levier dynamométrique 15. La répartition des masses de l'équipage oscillant formé du corps 11, du levier 15 et du contrepoids 22, est ainsi faite que le couple qui s'exerce sur le levier, donc la force sur la poulie 18, donc la tension sur le fil, augmentent dans l'exemple illustré, au fur et à mesure que le levier 15 descend.As can be seen more precisely in FIGS. 1 and 2, the adjustment device 1 comprises an oscillating body 11 formed to delimit a central support 12 provided, on either side of its transverse faces 12 ls 12 2 , with an annular skirt 13. The oscillating body 11 is angularly wedged with a member 15 sensitive to the tension of the wire 2. In the example illustrated, the sensitive member 15 consists of a dynamometric lever exerting a return torque to the torque generated by the tension of the thread. As illustrated in the drawings, the lever 15 consists of two arms 16j and 16 2 , one of their common end supports a pin 17 on which is mounted a pulley 18 in permanent contact with the wire 2. The pulley 18 is placed downstream of the braking mechanism 4, in the direction of travel of the wire, considered in the direction of the arrow fj on the fig. 1. One of the arms, for example 16 2 , of the lever is equipped with a counterweight 19 mounted to be moved in sliding along the arm, in order to adjust the initial tension of the wire 2. The ends of the arms 16 „16 2 opposite those carrying the axis 17 are each shaped to present a fork 20 intended to be engaged by elastic deformation in an annular groove 21 formed on the oscillating body 11. The lever 15 is fixedly anchored to the oscillating body 11 using, for example, forks 20 which each come to bear, at their ends, on the oscillating body 11. According to a characteristic of the invention, the oscillating body 11 is associated with a counterweight 22 arranged so as to create a couple antagonistic to the couple of lever return, so that the latter is subjected to a resulting torque varying non-linearly as a function of the position of the oscillating body 11. The counterweight 22 is fixedly mounted on the oscillating body 11, in order to compensate for the weight of the dynamometric lever 15. The distribution of the masses of the oscillating assembly formed by the body 11, the lever 15 and the counterweight 22, is thus made so that the torque exerted on the lever, therefore the force on the pulley 18, therefore the tension on the wire, increase in the example illustrated, as the lever 15 descends.
Le dispositif de régulation 1 selon l'invention comporte, également, un ensemble 24 de transformation du mouvement du corps oscillant 11, en un mouvement de sollicitation du mécanisme de freinage 4, de telle manière qu'une augmentation ou une diminution de la tension du fil 2, appliquée à l'organe sensible, conduise respectivement à une diminution ou un accroissement de la force de freinage exercée par le mécanisme 4. Selon une autre caractéristique avantageuse de l'invention, l'ensemble de transformation 24 comporte au moins un et, dans l'exemple illustré, un premier 25 et un deuxième 26 systèmes à came et à galet. Dans l'exemple illustré, chaque système 25, 26 comporte une bague d'appui 27, 28 montée de part et d'autre du support central 12. Chaque bague d'appui 27, 28 présente une face transversale 27,, 28, placée en vis-à-vis respectivement de la face transversale 12,, 122 du support et équipée d'au moins un et, de préférence, de trois galets 29 montés chacun sur un axe radial 30. Tel que cela apparaît plus précisément à la fig. 4, les galets 29 sont décalés entre-eux de 120° selon une circonférence des bagues. De préférence, les galets 29 sont montés à l'intérieur d'une rainure annulaire 31 ménagée à partir des faces 27,, 28, des bagues et laissant subsister, de part et d'autre, une couronne annulaire 32 de montage pour les axes 30. Tel que cela ressort plus précisément de la fïg. 5, chaque galet 29 est destiné à coopérer avec une came 33 aménagée sur les faces transversales 12, et 122 du support central 12. Chaque face 12,, 122 du support 12 présente trois cames décalées de 120° selon une circonférence en présentant chacune une surface de roulement s'étendant sensiblement dans un plan radial. Bien entendu, il peut être envisagé d'intervertir la position des galets 29 et des cames 33 en les plaçant respectivement sur les bagues d'appui 27, 28 et le corps oscillant 11. A partir de la position illustrée aux fïg. 2, 4, 5, où les galets 29 sont placés sur la partie la plus élevée des cames 33, une rotation du corps 11 dans le sens de la flèche f2 conduit à amener les galets 29 sur la partie la moins élevée des cames (fig. 3). Lors de ce mouvement, les bagues d'appui 27, 28 se sont rapprochées selon une direction axiale, relativement par rapport au corps oscillant. Bien entendu, un mouvement de rotation du corps 11, selon un sens contraire au sens f2, conduit à un écartement relatif axial des bagues d'appui 27, 28 par rapport au corps 11. La mise en oeuvre préférée de trois galets 29 coopérant chacun avec une came 33 permet d'obtenir un déplacement axial de la bague et du corps oscillant, évitant un frottement préjudiciable au bon fonctionnement du dispositif.The regulating device 1 according to the invention also comprises an assembly 24 for transforming the movement of the oscillating body 11 into a movement for biasing the braking mechanism 4, so that an increase or a decrease in the tension of the wire 2, applied to the sensitive member, leads respectively to a decrease or an increase in the braking force exerted by the mechanism 4. According to another advantageous characteristic of the invention, the transformation assembly 24 comprises at least one and , in the example illustrated, a first 25 and a second 26 cam and roller systems. In the example illustrated, each system 25, 26 comprises a support ring 27, 28 mounted on either side of the central support 12. Each support ring 27, 28 has a transverse face 27 ,, 28, placed vis-à-vis respectively of the transverse face 12 ,, 12 2 of the support and equipped with at least one and, preferably, three rollers 29 each mounted on a radial axis 30. As shown more precisely in the fig. 4, the rollers 29 are offset from each other by 120 ° along a circumference of the rings. Preferably, the rollers 29 are mounted inside an annular groove 31 formed from the faces 27, 28, of the rings and leaving, on either side, an annular ring 32 for mounting the axes. 30. As can be seen more precisely from FIG. 5, each roller 29 is intended to cooperate with a cam 33 arranged on the transverse faces 12, and 12 2 of the central support 12. Each face 12 ,, 12 2 of the support 12 has three cams offset by 120 ° along a circumference by presenting each a rolling surface extending substantially in a radial plane. Of course, it can be envisaged to reverse the position of the rollers 29 and the cams 33 by placing them respectively on the support rings 27, 28 and the oscillating body 11. From the position illustrated in fig. 2, 4, 5, where the rollers 29 are placed on the highest part of the cams 33, a rotation of the body 11 in the direction of the arrow f 2 results in bringing the rollers 29 to the lowest part of the cams ( fig. 3). During this movement, the support rings 27, 28 are brought together in an axial direction, relatively with respect to the oscillating body. Of course, a movement of rotation of the body 11, in a direction opposite to the direction f 2 , leads to a relative axial spacing of the support rings 27, 28 relative to the body 11. The preferred implementation of three cooperating rollers 29 each with a cam 33 makes it possible to obtain an axial displacement of the ring and of the oscillating body, avoiding friction which is detrimental to the proper functioning of the device.
Tel que cela ressort plus précisément des fig. 2, 3, la bague d'appui 27 est montée de manière à être en contact avec le ressort 9 par sa face transversale 272 opposée à sa face 27,. Les bagues d'appui 27, 28 sont calées angulairement sur un axe support 34 par l'intermédiaire, dans l'exemple illustré, d'une bille 35 engagée dans une rainure axiale 36 ménagée sur un axe support 34. La bague d'appui 28 est maintenue en position axiale par l'intermédiaire d'un organe de blocage 38 qui, dans l'exemple illustré, est constitué par un écrou pourvu d'un volant de manoeuvre 39 et vissé sur l'axe support 34. Dans la variante de réalisation illustrée, l'organe de blocage 38 permet de déplacer axialement l'ensemble constitué par les bagues 27, 28 et le corps oscillant 11, autorisant ainsi un réglage de l'effort exercé par le ressort 9 sur le mécanisme de freinage 4. A cet effet, la bague d'appui 27 et le corps oscillant 11 sont montés libres en déplacement axial sur l'axe support 34.As can be seen more precisely from FIGS. 2, 3, the support ring 27 is mounted so as to be in contact with the spring 9 by its transverse face 27 2 opposite its face 27,. The support rings 27, 28 are fixed angularly on a support axis 34 by means, in the example illustrated, of a ball 35 engaged in an axial groove 36 formed on a support axis 34. The support ring 28 is held in the axial position by means of a locking member 38 which, in the example illustrated, consists of a nut provided with an operating wheel 39 and screwed onto the support axis 34. In the variant of the illustrated embodiment, the locking member 38 makes it possible to axially move the assembly formed by the rings 27, 28 and the oscillating body 11, thus allowing adjustment of the force exerted by the spring 9 on the braking mechanism 4. To this end, the support ring 27 and the oscillating body 11 are mounted free in axial movement on the support axis 34.
Tel que cela ressort plus précisément des fig. 3 et 6, le dispositif selon l'invention comporte, de préférence, un organe 40 de limitation de l'oscillation du corps 11 dans une plage angulaire a prédéterminée. Dans la variante illustrée, l'organe 40 est constitué par un téton 41 ancré sur la bague d'appui 28 et engagé dans une rainure 42 réalisée sur le corps oscillant 11, sur un tronçon circulaire adapté pour autoriser une oscillation du corps oscillant 11 selon une plage angulaire, par exemple de l'ordre de 60°. D'une manière avantageuse, en position de fonctionnement, le centre de masse du contrepoids 22 et le point d'application de la tension du fil sur le levier 15, à savoir la poulie 18, se trouvent placés dans deux quadrants opposés en formant un décalage angulaire donné φ. Dans l'exemple illustré, le levier 15 et le contrepoids 22 sont décalés entre eux d'un angle φ d'une valeur de l'ordre de 195° . Dans une position extrême du corps 11, illustrée à la fig. 6, le levier 15 définit avec l'axe vertical un angle β de l'ordre de 75°, tandis que le contrepoids 22 fait un angle de 60° avec l'axe vertical. Dans cette position, il est à noter que les galets 29 sont placés dans la partie de roulement la moins élevée des cames 33 (fig. 3). Dans l'autre position extrême du corps oscillant 11, il s'ensuit que le levier 15 fait un angle β de 15°, tandis que le contrepoids s'établit alors sensiblement à la verticale. Les galets 29 sont alors situés sur la partie la plus élevée des cames 33. Lors du mouvement décrit ci-dessus, pour lequel le levier descend, il doit être considéré que, simultanément, la force antagoniste créée par le contrepoids 22 diminue, de sorte que le couple résultant s'exerçant sur le levier 15 augmente. Ainsi, tel que cela ressort de la fig. 7, qui illustre la variation du couple résultant C appliqué au levier par rapport à la position angulaire or (en degrés) du contrepoids 22, il apparaît que le couple résultant C augmente lorsque le contrepoids remonte, c'est-à-dire lorsque l'angle α diminue. Bien entendu, pour un mouvement de sens contraire du levier, il se produit un phénomène inverse.As can be seen more precisely from FIGS. 3 and 6, the device according to the invention preferably comprises a member 40 for limiting the oscillation of the body 11 within a predetermined angular range. In the illustrated variant, the member 40 consists of a stud 41 anchored on the support ring 28 and engaged in a groove 42 produced on the oscillating body 11, on a circular section adapted to allow an oscillation of the oscillating body 11 according to an angular range, for example of the order of 60 °. Advantageously, in the operating position, the center of mass of the counterweight 22 and the point of application of the tension of the wire on the lever 15, namely the pulley 18, are placed in two opposite quadrants by forming a given angular offset φ. In the example illustrated, the lever 15 and the counterweight 22 are offset between them by an angle φ of a value of the order of 195 °. In an extreme position of the body 11, illustrated in FIG. 6, the lever 15 defines with the vertical axis an angle β of the order of 75 °, while the counterweight 22 makes an angle of 60 ° with the vertical axis. In this position, it should be noted that the rollers 29 are placed in the lowest rolling part of the cams 33 (fig. 3). In the other extreme position of the oscillating body 11, it follows that the lever 15 makes an angle β of 15 °, while the counterweight is then established substantially vertically. The rollers 29 are then located on the highest part of the cams 33. During the movement described above, for which the lever descends, it must be considered that, simultaneously, the opposing force created by the counterweight 22 decreases, so that the resulting torque exerted on the lever 15 increases. Thus, as is apparent from FIG. 7, which illustrates the variation in the resulting torque C applied to the lever relative to the angular position or (in degrees) of the counterweight 22, it appears that the resulting torque C increases when the counterweight rises, that is to say when the 'angle α decreases. Of course, for a movement of the lever in the opposite direction, an opposite phenomenon occurs.
Le fonctionnement du dispositif de régulation 1 selon l'invention découle directement de la description qui précède.The operation of the regulating device 1 according to the invention follows directly from the above description.
Le levier dynamométrique 15, qui prend appui sur le fil 2, exerce par son propre poids une tension donnée ayant tendance à le faire descendre vers le bas en entraînant le fil 2. La tension donnée au fil par le serrage exercé par les coupelles de freinage 5,, 52 est renforcée par la friction provoquée par la vitesse linéaire variable du fil 2. Cette tension peut être accentuée par le coefficient de glissement plus ou moins élevé du fil. Si la tension du fil 2 diminue, en rapport d'une constante x prédéterminée par le positionnement des masses de l'équipage oscillant 11-15-22, le levier dynamométrique 15 descend, entraînant une rotation concomitante du corps 11 et, par suite, une montée du contrepoids 22, de sorte que le couple antagoniste diminue. Il s'ensuit que le couple résultant qui s'exerce sur le levier augmente. La rotation du corps 11 conduit les galets 29 à venir rouler sur les portions des cames 33 qui présentent une pente plus accentuée, entraînant un déplacement axial de la bague d'appui 27 et, par suite, une augmentation de l'effort de compression exercée sur les coupelles par le ressort 9. La force de serrage des coupelles est accentuée, de sorte que la tension du fil 2 va, également, s'accroître tant que le levier dynamométrique 15 descend. A un moment donné, les forces s'équilibrent et le levier 15 se stabilise.The dynamometric lever 15, which bears on the wire 2, exerts by its own weight a given tension tending to cause it to descend downwards by driving the wire 2. The tension given to the wire by the tightening exerted by the braking cups 5 ,, 5 2 is reinforced by the friction caused by the variable linear speed of the wire 2. This tension can be accentuated by the more or less high coefficient of sliding of the wire. If the tension of the thread 2 decreases, in relation to a constant x predetermined by the positioning of the masses of the oscillating assembly 11-15-22, the dynamometric lever 15 descends, causing a concomitant rotation of the body 11 and, consequently, a rise in the counterweight 22, so that the opposing torque decreases. It follows that the resulting torque exerted on the lever increases. The rotation of the body 11 leads the rollers 29 to come and roll on the portions of the cams 33 which have a steeper slope, causing an axial displacement of the support ring 27 and, consequently, an increase in the compressive force exerted on the cups by the spring 9. The clamping force of the cups is accentuated, so that the tension of the wire 2 will also increase as the torque lever 15 descends. At a given moment, the forces balance and the lever 15 stabilizes.
Il doit donc être compris que plus la tension du fil diminue, en rapport d'une constante prédéterminée par l'équipage oscillant 11-15-22, plus le levier 15 descend, plus le couple résultant s'exerçant sur le levier augmente et plus l'effort de compression exercé par les coupelles de freinage augmente.It must therefore be understood that the more the tension of the thread decreases, in relation to a constant predetermined by the oscillating assembly 11-15-22, the more the lever 15 descends, the more the resulting torque exerted on the lever increases and more the compressive force exerted by the braking cups increases.
Lorsque la tension du fil 2 augmente, en rapport d'une constante x prédéterminée par le positionnement des masses de l'équipage oscillant 11-15-22, le processus décrit ci-dessus s'inverse. Le poids du levier 15 devient plus faible que la tension du fil, de sorte que le levier 15 remonte, le contrepoids 22 descend et le couple antagoniste créé par le contrepoids 22 augmente. Le couple résultant qui s'exerce sur le levier 15 diminue. Le corps 11 oscille dans un mouvement inverse ayant tendance à rapprocher les bagues d'appui 27, 28 du corps 11 et, par suite, à augmenter l'écartement entre la bague d'appui 27 et la coupelle 5,. Le ressort 9 exerce ainsi une pression moins importante sur les coupelles, de sorte que le freinage du fil provoqué par les coupelles diminue. La tension du fil 2 est ainsi diminuée, de sorte que le levier dynamométrique 15 remonte jusqu'au moment où les forces s'équilibrent.When the tension of the thread 2 increases, in relation to a constant x predetermined by the positioning of the masses of the oscillating assembly 11-15-22, the process described above is reversed. The weight of the lever 15 becomes lower than the tension of the thread, so that the lever 15 rises, the counterweight 22 descends and the opposing torque created by the counterweight 22 increases. The resulting torque exerted on the lever 15 decreases. The body 11 oscillates in a reverse movement tending to bring the support rings 27, 28 closer to the body 11 and, consequently, to increase the spacing between the support ring 27 and the cup 5,. The spring 9 thus exerts less pressure on the cups, so that the braking of the wire caused by the cups decreases. The tension of the wire 2 is thus reduced, so that the dynamometric lever 15 rises until the moment when the forces balance.
Il doit donc être compris que plus la tension du fil augmente, en rapport d'une constante x prédéterminée par l'équipage oscillant 11-15-22, plus le levier 15 remonte, plus le couple résultant s'exerçant sur le levier diminue, et plus l'effort de compression exercé par les coupelles de freinage diminue. L'équipage oscillant 11- 15-22 est adapté de façon que le couple créé par lui puisse l'équilibrer en permanence, et cela quelle que soit sa position, par rapport à la force engendrée par la tension constante d'un fil. La force engendrée par la tension constante du fil est celle qui existe du fait de la traction des deux brins du fil s'étendant de part et d'autre de la poulie 18, cette force étant modulée en fonction de l'angle formé entre lesdits brins du fil.It must therefore be understood that the more the thread tension increases, in relation to a constant x predetermined by the oscillating assembly 11-15-22, the more the lever 15 rises, the more the resulting torque exerted on the lever decreases, and the more the compression force exerted by the braking cups decreases. The oscillating assembly 11-15-22 is adapted so that the torque created by it can balance it permanently, regardless of its position, with respect to the force generated by the constant tension of a thread. The force generated by the constant tension of the wire is that which exists due to the traction of the two strands of the wire extending on either side of the pulley 18, this force being modulated as a function of the angle formed between said strands of the wire.
Il est à noter qu'à l'arrêt de la machine, le fil 2 ne se trouve plus absorbé par la machine, de sorte que disparaît la force additionnelle de tension provoquée par la friction du fil entre les coupelles selon la vitesse linéaire. La tension du fil diminue d'autant, ne permettant plus de compenser le poids du levier 15. Il s'ensuit ainsi que le levier 15 descend et provoque la compression maximale possible du ressort. La pression des coupelles de freinage du fil devient suffisante pour stabiliser le fil en attente de réutilisation ou de remise en marche de la machine.It should be noted that when the machine stops, the wire 2 is no longer absorbed by the machine, so that the additional tension force caused by the friction of the wire between the cups disappears according to the linear speed. The thread tension decreases accordingly, no longer making it possible to compensate for the weight of the lever 15. It therefore follows that the lever 15 descends and causes the maximum possible compression of the spring. The pressure of the wire brake cups becomes sufficient to stabilize the wire while awaiting reuse or restarting the machine.
De la description qui précède, il apparaît clairement que le dispositif selon l'invention permet d'obtenir une régulation automatique de la tension d'un fil 2. Le dispositif selon l'invention présente l'avantage de présenter une grande sensibilité et fiabilité tout en présentant un prix de revient relativement faible. Le dispositif selon l'invention offre l'avantage de présenter un haut rendement par la mise en oeuvre d'au moins un jeu de trois galets et cames permettant d'obtenir une poussée axiale entre la ou les bagues d'appui et le corps oscillant. Il s'avère, également, que la mise en oeuvre d'un équipage oscillant 11-15-22 permet d'exercer, sur le levier 15, un couple résultant qui diminue ou augmente, alors que l'action des coupelles de freinage, respectivement, diminue ou augmente, de sorte que l'action de l'équipage oscillant ne contrecarrie nullement l'action du mécanisme de freinage. Par ailleurs, l'utilisation d'un contrepoids 22 permet de disposer d'un couple de valeur élevée, destiné à être utilisé pour la tension du fil 2. Il est à noter que la valeur du couple du levier est maximale en position basse de ce dernier, c'est-à-dire lorsque l'angle formé entre les brins du fil, qui s'étendent de part et d'autre de la poulie 18, présente la valeur la plus faible. II doit être compris, par ailleurs, que la mise en oeuvre d'un contrepoids 22 crée un couple antagoniste au couple de rappel exercé par le levier, de sorte que le levier est soumis à un couple résultant variant de façon linéaire en fonction du déplacement angulaire du corps oscillant.From the above description, it is clear that the device according to the invention makes it possible to obtain automatic regulation of the tension of a thread 2. The device according to the invention has the advantage of having great sensitivity and reliability while by presenting a relatively low cost price. The device according to the invention offers the advantage of having a high efficiency by the implementation of at least one set of three rollers and cams making it possible to obtain an axial thrust between the support ring or rings and the oscillating body. . It also turns out that the use of an oscillating assembly 11-15-22 makes it possible to exert, on the lever 15, a resulting torque which decreases or increases, while the action of the braking cups, respectively, decreases or increases, so that the action of the oscillating crew in no way counteracts the action of the braking mechanism. Furthermore, the use of a counterweight 22 makes it possible to have a torque of high value, intended to be used for tensioning the thread 2. It should be noted that the value of the torque of the lever is maximum in the low position of the latter, that is to say when the angle formed between the strands of the wire, which extend on either side of the pulley 18, has the lowest value. It should be understood, moreover, that the use of a counterweight 22 creates a torque opposing the restoring torque exerted by the lever, so that the lever is subjected to a resulting torque varying linearly as a function of the displacement angle of the oscillating body.
Il doit être noté que le couple C, disponible sur le levier 15, est une combinaison linéaire d'au moins deux fonctions sinusoïdales, à savoir C = KL sin(α + φ) - Kc sin a, avec : - KL : coefficient dépendant de la position du centre de masse du levier 15 et de la valeur de la masse équivalente,It should be noted that the torque C, available on the lever 15, is a linear combination of at least two sinusoidal functions, namely C = K L sin (α + φ) - Kc sin a, with: - K L : coefficient depending on the position of the center of mass of the lever 15 and the value of the equivalent mass,
- Kc : coefficient dépendant de la position du centre de masse du contrepoids 22, et de la valeur de la masse équivalente, - φ : l'angle de déphasage par rapport au centre de rotation du corps oscillant, du levier et du contrepoids, à savoir 15 ° dans l'exemple illustré.- Kc: coefficient dependent on the position of the center of mass of the counterweight 22, and on the value of the equivalent mass, - φ: the angle of phase shift relative to the center of rotation of the oscillating body, of the lever and of the counterweight, namely 15 ° in the example illustrated.
Le couple résultant, appliqué à la poulie 18 par l'équipage oscillant formé du corps 11, du levier 15 et du contrepoids 22, présente une variation sensiblement identique à la force qui serait provoquée par une tension constante du fil. Il s'ensuit que le dispositif selon l'invention permet d'assurer une tension du fil à une valeur sensiblement constante, quelle que soit la position du levier 15.The resulting torque, applied to the pulley 18 by the oscillating assembly formed by the body 11, the lever 15 and the counterweight 22, presents a variation substantially identical to the force which would be caused by a constant tension of the wire. It follows that the device according to the invention makes it possible to ensure a tension of the thread at a substantially constant value, whatever the position of the lever 15.
Selon une caractéristique avantageuse de l'invention, le levier 15 et le contrepoids 22 sont adaptés pour permettre de faire varier, de façon non linéaire, les valeurs du couple résultant. Une telle possibilité offre l'avantage de pouvoir tenir compte, notamment, des différentes natures ou grosseurs de fils utilisés. Tel que cela apparaît à la fig. 7, il apparaît ainsi possible de modifier l'allure du couple C appliqué, dont la variation n'est pas linéaire. Il peut ainsi être envisagé de modifier la valeur du couple appliqué sur le levier uniquement dans sa position haute, tout en le conservant dans sa position basse. Les valeurs du couple résultant appliqué au levier peuvent ainsi être réglées de façon non linéaire en fonction de l'angle pris par le levier.According to an advantageous characteristic of the invention, the lever 15 and the counterweight 22 are adapted to make it possible to vary, in a non-linear manner, the values of the resulting torque. Such a possibility offers the advantage of being able to take into account, in particular, the different types or sizes of son used. As shown in fig. 7, it thus appears possible to modify the shape of the applied torque C, the variation of which is not linear. It can thus be envisaged to modify the value of the torque applied to the lever only in its high position, while keeping it in its low position. The values of the resulting torque applied to the lever can thus be adjusted non-linearly as a function of the angle taken by the lever.
La variation des valeurs du couple résultant appliqué au levier peut être obtenue en réglant le décalage angulaire φ entre le levier 15 et le contrepoids 22. A cet effet, il peut être prévu de monter, par exemple, le levier 15 et/ou le contrepoids 22 réglable angulairement sur le corps 11.The variation of the values of the resulting torque applied to the lever can be obtained by adjusting the angular offset φ between the lever 15 and the counterweight 22. For this purpose, it can be provided to mount, for example, the lever 15 and / or the counterweight 22 angularly adjustable on the body 11.
La fig. 8 illustre un exemple de réalisation d'un contrepoids 22 muni de moyens adaptés pour modifier la position de son centre de masse, en vue de régler les valeurs du couple résultant. Dans l'exemple illustré, le contrepoids 22 est réalisé sous la forme d'un bras support 50 s'étendant à partir du corps oscillant 11 et délimitant, de part et d'autre d'une cloison centrale 51, un logement 52 fermé par un couvercle 53. Chaque logement 52 est destiné à contenir une masselotte 54 présentant, par exemple, une forme en demi-disque, chaque masselotte 54, qui est maintenue par des nervures 55 portées par les couvercles, peut être déplacée en rotation autour d'un axe parallèle à l'axe de rotation du corps 11, par l'intermédiaire des couvercles associés. Le déplacement indépendant des deux masselottes 54 permet de placer dans une position précise, s'inscrivant à l'intérieur d'un cercle contenant l'enveloppe de déplacement des masselottes, le centre de masse résultant du contrepoids 22. Le centre de masse du contrepoids 22 peut ainsi être rapproché ou écarté par rapport à son axe de rotation et/ou être décalé angulairement par rapport au levier 15. Une telle disposition permet ainsi de modifier le décalage angulaire φ entre le levier 15 et le contrepoids 22.Fig. 8 illustrates an exemplary embodiment of a counterweight 22 provided with means adapted to modify the position of its center of mass, in order to adjust the values of the resulting torque. In the example illustrated, the counterweight 22 is produced in the form of a support arm 50 extending from the oscillating body 11 and delimiting, on either side of a central partition 51, a housing 52 closed by a cover 53. Each housing 52 is intended to contain a counterweight 54 having, for example, a semi-disc shape, each counterweight 54, which is held by ribs 55 carried by the covers, can be moved in rotation around an axis parallel to the axis of rotation of the body 11, by means of the associated covers. The independent displacement of the two weights 54 makes it possible to place in a precise position, inscribed inside a circle containing the envelope for moving the weights, the center of mass resulting from the counterweight 22. The center of mass of the counterweight 22 can thus be moved towards or away from its axis of rotation and / or be angularly offset relative to the lever 15. Such an arrangement thus makes it possible to modify the angular offset φ between the lever 15 and the counterweight 22.
Tel que cela apparaît à la fig. 7, le réglage angulaire de la position des masselottes 54 permet de régler la position du centre de masse du contrepoids 22 et, par suite, de déterminer et de choisir une forme de couple C,, C2 à appliquer pour divers types de fils connus.As shown in fig. 7, the angular adjustment of the position of the counterweights 54 makes it possible to adjust the position of the center of mass of the counterweight 22 and, consequently, to determine and choose a form of torque C ,, C 2 to be applied for various types of known wires .
Bien entendu, il peut être envisagé de constituer un contrepoids 22 pourvu d'un nombre différent de masselottes élémentaires. Dans le même sens, il doit être noté qu'il peut être prévu d'utiliser des masselottes de diverses valeurs dont la position angulaire est modifiée ou reste fixe. II est à noter que le dispositif selon l'invention, en mettant en oeuvre deux ensembles 25, 26 de transformation du mouvement du corps oscillant 11, permet de doubler la plage de réglage du ressort 9. Bien entendu, il pourrait être envisagé de mettre en oeuvre un unique ensemble de transformation, par exemple 25. Dans cet exemple de réalisation, le corps 11 est monté fixe axialement ou libre en déplacement axial pour autoriser un réglage de sa position axiale. Bien entendu, il pourrait être envisagé d'utiliser uniquement l'ensemble de transformation 26, de sorte que le corps oscillant 11 serait monté pour agir directement sur le ressort 9, tandis que la bague d'appui 25 serait montée fixe axialement ou, comme illustré, libre en déplacement axial pour assurer un réglage initial de la tension du ressort 9. De préférence mais non exclusivement, il peut être prévu de monter, par tous moyens appropriés sur le corps oscillant 11, un flasque de protection 43 traversé en son milieu par le ressort 9 et permettant d'éviter l'introduction de corps étrangers à l'intérieur, notamment, de l'ensemble de transformation du mouvement du corps oscillant.Of course, it can be envisaged to constitute a counterweight 22 provided with a different number of elementary weights. In the same direction, it should be noted that it can be provided to use weights of various values whose angular position is modified or remains fixed. It should be noted that the device according to the invention, by implementing two assemblies 25, 26 for transforming the movement of the oscillating body 11, makes it possible to double the adjustment range of the spring 9. Of course, it could be envisaged to put using a single transformation assembly, for example 25. In this embodiment, the body 11 is mounted axially fixed or free in axial displacement to allow adjustment of its axial position. Of course, it could be envisaged to use only the transformation assembly 26, so that the oscillating body 11 would be mounted to act directly on the spring 9, while the support ring 25 would be mounted fixed axially or, as illustrated, free in axial movement to ensure an initial adjustment of the tension of the spring 9. Preferably but not exclusively, provision may be made to mount, by any appropriate means on the oscillating body 11, a protective flange 43 crossed at its middle by the spring 9 and making it possible to avoid the introduction of foreign bodies inside, in particular, of the assembly for transforming the movement of the oscillating body.
Selon une caractéristique avantageuse de l'invention, l'axe support 34 comporte des moyens 44 de montage amovible sur l'arbre 6 supportant les coupelles. Dans l'exemple illustré, l'axe support 34 est pourvu d'un taraudage 44 assurant son vissage sur l'arbre fileté 6. Une telle disposition autorise le montage du dispositif de régulation selon l'invention sur les principales machines textiles équipées généralement d'un mécanisme de freinage à coupelles. Par ailleurs, il est à noter que le dispositif selon l'invention peut être monté d'une manière réversible sur les mécanismes de freinage 4. La seule modification concerne la position de la rainure 42 limitant l'oscillation du corps 11, qui doit être ménagée dans une position symétrique par rapport à la verticale. Il est à noter, également, que la répartition des charges du levier et du contrepoids sur le corps 11 est déterminée pour permettre une action de la pesanteur.According to an advantageous characteristic of the invention, the support axis 34 comprises means 44 for removable mounting on the shaft 6 supporting the cups. In the example illustrated, the support axis 34 is provided with a thread 44 ensuring its screwing on the threaded shaft 6. Such an arrangement allows the mounting of the regulating device according to the invention on the main textile machines generally equipped with '' a cup braking mechanism. Furthermore, it should be noted that the device according to the invention can be mounted in a reversible manner on the braking mechanisms 4. The only modification relates to the position of the groove 42 limiting the oscillation of the body 11, which must be arranged in a symmetrical position with respect to the vertical. It should also be noted that the distribution of the loads of the lever and the counterweight on the body 11 is determined to allow an action of gravity.
De préférence, le dispositif selon l'invention est mis en oeuvre en utilisant un dispositif 46 d'embarrage du fil 2, placé entre les coupelles 5,,52 et la poulie 18. Le dispositif d'embarrage 46 est constitué par une poulie permettant de changer l'angle d'attaque du levier 15 par rapport au fil 2, favorisant ainsi la remontée du levier 15.Preferably, the device according to the invention is implemented using a device 46 for securing the wire 2, placed between the cups 5,, 5 2 and the pulley 18. The securing device 46 is constituted by a pulley making it possible to change the angle of attack of the lever 15 relative to the wire 2, thus promoting the raising of the lever 15.
POSSIBILITE D'APPLICATION INDUSTRIELLE :POSSIBILITY OF INDUSTRIAL APPLICATION:
L'objet de l'invention trouve une application particulièrement avantageuse pour équiper, notamment, les machines textiles à tricoter rectilignes industrielles ou les cantres pour ourdissage. The object of the invention finds a particularly advantageous application for equipping, in particular, industrial rectilinear textile knitting machines or creels for warping.

Claims

REVENDICATIONS :CLAIMS:
1 - Dispositif de réglage automatique de la tension d'un fil (2), le dispositif agissant sur un mécanisme (4) de freinage du fil et comportant :1 - Device for automatically adjusting the tension of a thread (2), the device acting on a thread braking mechanism (4) and comprising:
- un corps oscillant (11) équipé d'un organe (15) sensible à la tension du fil (2) et adapté pour créer un couple de rappel au couple engendré par la tension du fil,- an oscillating body (11) equipped with a member (15) sensitive to the tension of the thread (2) and adapted to create a return torque to the torque generated by the tension of the thread,
- et un ensemble (24) de transformation du mouvement du corps oscillant (11) en un mouvement de sollicitation du mécanisme de freinage (4), de telle manière qu'une augmentation ou une diminution de la tension du fil appliqué à l'organe sensible conduise respectivement à une diminution ou à un accroissement de la force de freinage exercée par le mécanisme de freinage, caractérisé en ce que le corps oscillant (11) est équipé d'un contrepoids (22) adapté pour créer un couple antagoniste au couple de rappel, de sorte que l'organe sensible soit soumis à un couple résultant variant de façon non linéaire en fonction du déplacement angulaire du corps oscillant.- And an assembly (24) for transforming the movement of the oscillating body (11) into a movement for biasing the braking mechanism (4), so that an increase or a decrease in the tension of the wire applied to the member sensitive leads respectively to a decrease or an increase in the braking force exerted by the braking mechanism, characterized in that the oscillating body (11) is equipped with a counterweight (22) adapted to create an antagonistic torque to the torque of recall, so that the sensitive member is subjected to a resulting torque varying non-linearly as a function of the angular displacement of the oscillating body.
2 - Dispositif selon la revendication 1, caractérisé en ce que le corps oscillant (11) est équipé du contrepoids (22) et de l'organe sensible (15) formé par un levier dynamométrique, de telle manière que la répartition des masses de l'équipage oscillant ainsi constitué, permette d'assurer l'application sur le levier (15), d'un couple résultant diminuant ou augmentant, pour, respectivement, une diminution ou une augmentation de la force de freinage exercée par le mécanisme de freinage (4).2 - Device according to claim 1, characterized in that the oscillating body (11) is equipped with the counterweight (22) and the sensitive member (15) formed by a dynamometric lever, so that the distribution of the masses of the oscillating equipment thus formed, allows the application to the lever (15) of a resulting torque decreasing or increasing, for, respectively, a decrease or an increase in the braking force exerted by the braking mechanism ( 4).
3 - Dispositif selon la revendication 1 ou 2, caractérisé en ce que le levier (15) et le contrepoids (22) sont adaptés pour permettre de faire varier, de façon non linéaire, les valeurs du couple résultant.3 - Device according to claim 1 or 2, characterized in that the lever (15) and the counterweight (22) are adapted to allow to vary, non-linearly, the values of the resulting torque.
4 - Dispositif selon la revendication 1 ou 2, caractérisé en ce que le contrepoids (22) et le levier (15) sont placés de manière que, respectivement, son centre de masse et le point d'application de la tension du fil se trouvent placés dans deux quadrants opposés, en formant un décalage angulaire (φ) de valeur réglable.4 - Device according to claim 1 or 2, characterized in that the counterweight (22) and the lever (15) are placed so that, respectively, its center of mass and the point of application of the thread tension are placed in two opposite quadrants, forming an angular offset (φ) of adjustable value.
5 - Dispositif selon la revendication 4, caractérisé en ce que le corps oscillant (11) est équipé d'un contrepoids (22) muni de moyens adaptés pour régler la position de son centre de masse par rapport à l'axe de rotation.5 - Device according to claim 4, characterized in that the body oscillating (11) is equipped with a counterweight (22) provided with means adapted to adjust the position of its center of mass relative to the axis of rotation.
6 - Dispositif selon la revendication 1, caractérisé en ce que le corps oscillant (11) est sollicité par un ensemble (24) de transformation du mouvement du corps oscillant comportant au moins un système (25 ou 26) comprenant trois jeux de cames et de galets, l'un des éléments du système à came et galet étant monté sur le corps oscillant (11), tandis que l'autre élément est porté par une bague d'appui (27, 28), les faces transversales des bagues d'appui et du corps oscillant étant adaptées pour recevoir les cames ou les galets répartis régulièrement selon l'une de leur circonférence, assurant la transformation du mouvement du corps oscillant en un mouvement axial de sollicitation du mécanisme de freinage (4).6 - Device according to claim 1, characterized in that the oscillating body (11) is biased by an assembly (24) for transforming the movement of the oscillating body comprising at least one system (25 or 26) comprising three sets of cams and rollers, one of the elements of the cam and roller system being mounted on the oscillating body (11), while the other element is carried by a support ring (27, 28), the transverse faces of the rings support and of the oscillating body being adapted to receive the cams or the rollers distributed regularly along one of their circumference, ensuring the transformation of the movement of the oscillating body into an axial movement of biasing of the braking mechanism (4).
7 - Dispositif de réglage selon la revendication 1 , caractérisé en ce que l'ensemble de transformation (24) du mouvement du corps oscillant comporte un deuxième (25 et 26) système à came et à galet, l'un des éléments du deuxième système à came et à galet étant monté sur le corps oscillant (11), tandis que l'autre élément est porté par une bague d'appui complémentaire (27, 28).7 - Adjustment device according to claim 1, characterized in that the transformation assembly (24) of the movement of the oscillating body comprises a second (25 and 26) cam and roller system, one of the elements of the second system with cam and roller being mounted on the oscillating body (11), while the other element is carried by a complementary support ring (27, 28).
8 - Dispositif de freinage selon les revendications 6 et 7, caractérisé en ce que la bague d'appui (27, 28) est montée libre ou fixe en déplacement axial, tandis que le corps oscillant (11) est monté respectivement fixe ou libre en déplacement axial.8 - Braking device according to claims 6 and 7, characterized in that the support ring (27, 28) is mounted free or fixed in axial displacement, while the oscillating body (11) is mounted respectively fixed or free in axial displacement.
9 - Dispositif de freinage selon les revendications 6 et 7, caractérisé en ce que l'une des bagues d'appui (28) est montée fixe en déplacement axial, tandis que l'autre des bagues d'appui (27) et le corps oscillant (11) sont montés libres en déplacement axial. 10 - Dispositif de freinage selon la revendication 8 ou 9, caractérisé en ce que la bague d'appui (27, 28) ou le corps oscillant (11) est monté fixement en déplacement axial par l'intermédiaire d'un organe (38) de blocage en position axiale.9 - Braking device according to claims 6 and 7, characterized in that one of the support rings (28) is mounted fixed in axial displacement, while the other of the support rings (27) and the body oscillating (11) are mounted free in axial displacement. 10 - Braking device according to claim 8 or 9, characterized in that the support ring (27, 28) or the oscillating body (11) is fixedly mounted in axial movement by means of a member (38) locking in axial position.
11 - Dispositif de réglage selon la revendication 6 ou 7, caractérisé en ce que chaque bague d'appui (27, 28) du système à came et à galet est adaptée pour recevoir sur sa face transversale une came (33) ou un galet (29), destiné à coopérer respectivement avec un galet (29) ou une came (33) adapté sur les faces transversales du corps oscillant (11).11 - Adjustment device according to claim 6 or 7, characterized in that each support ring (27, 28) of the cam and roller system is adapted to receive on its transverse face a cam (33) or a roller ( 29), intended to cooperate respectively with a roller (29) or a cam (33) adapted on the transverse faces of the oscillating body (11).
12 - Dispositif de réglage selon la revendication 6 ou 7, caractérisé en ce que le corps oscillant (11) et la ou les bagues d'appui (27, 28) sont montés sur un axe support (34) équipé de moyens de fixation (44) permettant un montage amovible du dispositif sur le mécanisme (4) de freinage du fil.12 - Adjustment device according to claim 6 or 7, characterized in that the oscillating body (11) and the support ring or rings (27, 28) are mounted on a support axis (34) equipped with fixing means ( 44) allowing a removable mounting of the device on the wire braking mechanism (4).
13 - Dispositif de réglage selon l'une des revendications 1 à 12, caractérisé en ce qu'il comporte un moyen (41, 42) de limitation du mouvement du corps oscillant (11), dans une plage angulaire (α), à partir sensiblement de l'axe vertical. 14 - Mécanisme de freinage pour un fil, du type comportant une paire de coupelles (5,, 52) montées sur un axe (6) et entre lesquelles passe le fil dont la tension est à régler, l'une des coupelles étant sollicitée par un ressort (9) monté sur l'axe support (6), caractérisé en ce que l'arbre support est équipé d'un dispositif de réglage (1) selon la revendication 1. 15 - Mécanisme selon la revendication 14, caractérisé en ce qu'il comporte un dispositif d'embarrage (46) du fil interposé entre l'organe sensible (15) à la tension du fil et la paire de coupelles (5,, 52). 13 - Adjustment device according to one of claims 1 to 12, characterized in that it comprises means (41, 42) for limiting the movement of the oscillating body (11), in an angular range (α), from substantially from the vertical axis. 14 - Braking mechanism for a wire, of the type comprising a pair of cups (5 ,, 5 2 ) mounted on an axis (6) and between which passes the wire whose tension is to be adjusted, one of the cups being stressed by a spring (9) mounted on the support axis (6), characterized in that the support shaft is equipped with an adjustment device (1) according to claim 1. 15 - Mechanism according to claim 14, characterized in that it comprises a device for interlocking (46) the wire interposed between the member sensitive (15) to the tension of the wire and the pair of cups (5 ,, 5 2 ).
PCT/FR1995/000154 1994-02-11 1995-02-09 Device for adjusting the tension of a thread WO1995021786A1 (en)

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FR94/01790 1994-02-11
FR9401790A FR2716183B1 (en) 1994-02-11 1994-02-11 Device for regulating the tension of a thread.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106835479A (en) * 2017-01-21 2017-06-13 慈溪市赛美格针织器材有限公司 A kind of tensioner of Thread-feeding device
CN107500036A (en) * 2017-09-18 2017-12-22 浙江德清华丝纺织有限公司 A kind of conductor structure on Weaving device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR915401A (en) * 1945-05-18 1946-11-06 Constant tension thread tensioner device
US2554493A (en) * 1947-08-22 1951-05-29 Specialties Dev Corp Yarn tensioning device
US3206138A (en) * 1963-05-24 1965-09-14 Loma B Beaty Thread tensioning device with interchangeable parts
US3575360A (en) * 1968-11-20 1971-04-20 Lawson Hemphill Universal compensating tension device
FR2159806A5 (en) * 1971-11-12 1973-06-22 Lemasson Jean Knitting machine - yarn feeder which automatically varies the tension
FR2168644A6 (en) * 1972-01-17 1973-08-31 Lemasson Jean Tensioning device - with movements of tension detector transmitted magnetically to yarn clamp
FR2213678A6 (en) * 1973-01-08 1974-08-02 Lemasson Jean Progressive yarn braking in knitting machine - using a clamp-type control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014759A1 (en) * 1990-05-08 1991-11-14 Adalbert Guggemos Yarn tension device for warping etc. - using closed loop mechanical system of rollers and levers controlling thread brake

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR915401A (en) * 1945-05-18 1946-11-06 Constant tension thread tensioner device
US2554493A (en) * 1947-08-22 1951-05-29 Specialties Dev Corp Yarn tensioning device
US3206138A (en) * 1963-05-24 1965-09-14 Loma B Beaty Thread tensioning device with interchangeable parts
US3575360A (en) * 1968-11-20 1971-04-20 Lawson Hemphill Universal compensating tension device
FR2159806A5 (en) * 1971-11-12 1973-06-22 Lemasson Jean Knitting machine - yarn feeder which automatically varies the tension
FR2168644A6 (en) * 1972-01-17 1973-08-31 Lemasson Jean Tensioning device - with movements of tension detector transmitted magnetically to yarn clamp
FR2213678A6 (en) * 1973-01-08 1974-08-02 Lemasson Jean Progressive yarn braking in knitting machine - using a clamp-type control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106835479A (en) * 2017-01-21 2017-06-13 慈溪市赛美格针织器材有限公司 A kind of tensioner of Thread-feeding device
CN107500036A (en) * 2017-09-18 2017-12-22 浙江德清华丝纺织有限公司 A kind of conductor structure on Weaving device

Also Published As

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FR2716183B1 (en) 1996-08-09
AU1711895A (en) 1995-08-29
FR2716183A1 (en) 1995-08-18

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