EP0831049B1 - Appareil fournisseur de fil - Google Patents

Appareil fournisseur de fil Download PDF

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Publication number
EP0831049B1
EP0831049B1 EP97116577A EP97116577A EP0831049B1 EP 0831049 B1 EP0831049 B1 EP 0831049B1 EP 97116577 A EP97116577 A EP 97116577A EP 97116577 A EP97116577 A EP 97116577A EP 0831049 B1 EP0831049 B1 EP 0831049B1
Authority
EP
European Patent Office
Prior art keywords
sensing element
feeding device
leg
yarn feeding
element body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97116577A
Other languages
German (de)
English (en)
Other versions
EP0831049A2 (fr
EP0831049A3 (fr
Inventor
Björn Halvarsson
Patrik Jonas Magnusson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iro AB
Original Assignee
Iro AB
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Filing date
Publication date
Application filed by Iro AB filed Critical Iro AB
Publication of EP0831049A2 publication Critical patent/EP0831049A2/fr
Publication of EP0831049A3 publication Critical patent/EP0831049A3/fr
Application granted granted Critical
Publication of EP0831049B1 publication Critical patent/EP0831049B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/367—Monitoring yarn quantity on the drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/50—Diminishing, minimizing or reducing
    • B65H2601/52—Diminishing, minimizing or reducing entities relating to handling machine
    • B65H2601/524—Vibration

Definitions

  • the invention relates to a thread delivery device according to the preamble of claim 1.
  • Such a thread delivery device is known from US-A-46 76 442.
  • This thread delivery device has a metal leaf spring, a rubber spiral spring or a coil tension spring designed and arranged so that the sensing element body assumes the outer position when the spring is relaxed and is moved into the inner position by the thread against the force of the spring. At least that External position can be defined by a stop.
  • the changes in movement of the Sensor element body between the outer and the inner layer are non-contact scanned (magnetic, inductive, opto-electronic, magnetoresistive, or similar), to determine whether or not there is thread on the sensing element body. From the Sampling are signals, for example, for controlling the drive motor of the thread delivery device derived.
  • the spring is relatively progressive Spring characteristics.
  • the operation of the sensor is against pollution, e.g. through fluff, sensitive. Such contamination affects the proper Movement of the sensing element body.
  • contamination e.g. through fluff
  • a Structural swivel axis of the sensing element body maintain contamination deposit just on the swivel axis, which is the proper function disturb or prevent sensitive.
  • due to the undamped spring and its progressive spring characteristic a rocking effect of the sensing element body occur, the proper scanning and clear Useful signals difficult. This swinging effect arises when the Feeling element body from the thread, because then the sensing element body abruptly jumps outside and resonates. There is no clearly palpable outer layer, because the sensing element body over the actual outer layer to the outside and then swings back inside.
  • the sensing element body tends to reverberate in the outer layer, causing faulty leaving the Outside location is registered, if necessary several times. This can lead to incorrect controls of the yarn delivery device, or can - if the sensing element body belongs to a thread break sensor - an incorrect shutdown signal is generated or there is no necessary shutdown signal. This critical response is negatively reinforced by the sensitivity of the spring and the Swivel bearing of the sensing element body.
  • the invention has for its object a yarn delivery device with at least one specify spring-loaded sensing element body of a contactless thread sensor, in a structurally simple, inexpensive way, a quick, clear Response with high reliability and insensitivity to pollution and clear and clear useful signals can be reached.
  • the sensing element body takes up the outer position precisely, as soon as it is exposed by the thread. There is no annoying ringing.
  • the damped leg spring over the entire path of movement of the sensing element body generates almost the same force that is chosen just high enough that the thread and the thread movements are not affected by this affect each other Deposited impurities such as fluff do not particularly affect the response behavior can, since the damped leg spring takes over the movement of the sensing element body, a pivot bearing that is sensitive to contamination Sensor element bodies are eliminated. There are powerful and meaningful useful signals and incorrect or missing signals are avoided.
  • the leg spring can take over the important function of the pivot bearing of the sensing element body and works dampened due to its construction.
  • leg spring is Insensitive to contamination and cleans itself during operation.
  • Leg springs are in many forms and specifications commercially available and inexpensive, and at the same time Very reliable over a long service life, since the deformation work extends over the entire Feather length distributed. In addition, the leg spring can be easily attached.
  • the usual principle is abandoned in the outer layer of the sensing element body to generate the lowest possible force, which is the thread for adjustment the sensing element body has to overcome from the outer layer to the inner layer, because the force exerted by the sensing element body on the thread over the entire Movement path is essentially constant and relatively high.
  • the leg spring is by the axle bolt according to claim 3, for damping can contribute, supported in every position of the sensing element body.
  • the sensing element body moves in a radial plane of the Storage body.
  • Favorable leverage ratios can be achieved.
  • the available standing installation space is used well.
  • the leg spring during the movement of the sensing element body deformed towards the inner position in the opening direction, and consequently with the opposite Direction of movement in the closing direction. This leads to taking the outer layer to avoid ringing.
  • the outer layer can also be exactly predetermine what is important for signal sampling.
  • the leg spring is in the outer position of the sensing element body biased against a stationary stop, so that the sensing element body a shows stable equilibrium without a tendency to reverberate.
  • the stop allows it to take advantage of a precisely predetermined part of the spring characteristic, within whose spring force hardly changes.
  • the stop is conveniently in Reference to the virtual swivel axis defined by the leg spring with optimal large lever arm arranged. In the contact area of the leg spring at the stop becomes a desirable self-cleaning effect through the working movement of the leg spring achieved.
  • the support leg of the leg spring in the storage body fixed so that when working the leg spring practically the entire length of the spring is usable. This also applies to the embodiment according to claim 8.
  • the sensing element body is permanently firmly on the freely projecting Leg attached.
  • the leg spring can save space with its axle bolt and sheltered in the storage body.
  • the insensitivity to pollution is caused by the top Coverage increased.
  • the cover takes on the additional task of the stop to define the outer layer and dampens reverberation movements.
  • the axle bolt acts as a friction damper in the outer layer or shortly before reaching the outside location.
  • the forward movement of the thread along the storage body at low mechanical stress on the thread the response movement derived from the sensing element body.
  • the integrated permanent magnet enables meaningful non-contact scanning for signal generation.
  • a thread delivery device F according to FIG. 1 has a plurality of thread sensors, each of which the presence or absence of the thread in the scanning zone assigned to it responds and generates signals that are processed further.
  • Detailed information for such a thread delivery device can be found in EP-B 0 171 516 and US-A 4,676,442, to which reference is hereby made.
  • the thread delivery device F has a housing 2 with a holding arm 3, on which a Carrier 4 is attached with a thread take-off eye 5.
  • the rotation turns the drive shaft a feed movement for the turns of one on the storage body 15 lying thread supply 26 generated. This could be changed Feed movement of the thread turns also caused in other ways become.
  • the thread designated 27 in the draw-off area is through the thread winding member 6 tangentially wound on the storage body 15 and is from the thread supply 26th via a head part 22 or a withdrawal edge of the storage body 15 through the thread withdrawal eyelet 5 axially subtracted, e.g. through an intermittent thread-consuming Loom (not shown).
  • a longitudinal recess 16 of the storage body 15 for example is delimited on the inside by a wall 17, here are for example several sensing element bodies of the thread sensors provided.
  • a thread sensor 18, 20 monitors the maximum size of the thread supply 26.
  • a thread sensor 19, 21 monitors the minimum size of the thread supply 26.
  • a thread sensor 19 ', 21' monitors the at least first turn of the thread supply 26 (thread break monitor).
  • Each thread sensor consists of the one between an outer layer (with the thread sensor 18, 20) and an inner layer caused by the thread (thread sensors 19, 21, 19 ', 21 ') movable sensing element body 18, 19, 19' and a sensing element 20, 21, 21 'in Holding arm 3.
  • the sensing element generates in the outer or inner position of the sensing element body a useful signal.
  • the useful signals for example, the drive motor in the Housing 2 controlled or a shutdown signal generated (in the event of a thread break).
  • the storage body 15 is against co-rotation with the drive shaft 7 by cooperating Magnets 24 and 23 prevented.
  • the magnets 23 are in this embodiment housed in a bracket 25. It is conceivable to use the magnets in the To arrange area of the take-up member 6.
  • a filler 14 in the storage body 15 prevents the ingress of contaminants.
  • each thread sensor is through a damped leg spring S, in the direction of the outer layer. He is pivotable about a virtual pivot axis, which is aligned approximately in the circumferential direction is.
  • the sensing element bodies are only indicated schematically in FIG. 1 and are described in more detail with reference to FIG. 2.
  • an axle bolt 28 is arranged, which carries the leg spring S, which has a support leg 30 (anchored in the storage body 15), several helical turns 29, and has a freely projecting leg 31.
  • the axle pin 28 defines with its axis 28 'the virtual pivot axis of the sensing element body 19, 32.
  • the outer layer A of the sensing element body 19, 32 shown in FIG. 2 is correct Outer diameter of the axle bolt 28 approximately with the inner diameter of the Coil spring turns 29 match.
  • the freely projecting leg 31 extends from the underside of the surface facing away from the surface of the storage body 15 Coil spring turns 29 obliquely upwards and is in the sensing element body 34 fixed.
  • the sensing element body 32 contains a permanent magnet 33, which is scanned by the respectively assigned sensing element 21, 20, 21 ' will (distance detection).
  • a stop 35 for the freely projecting Leg 31 represents and defines the outer layer A.
  • the leg 31 of the leg spring S with prestress on the stop 35 By the thread is (shown in dashed lines) the sensing element body 18 in the inner layer B. transferable, this movement acting on the leg spring S in the opening direction.
  • the stop 35 could also be in the path of movement of the sensing element body 18 be arranged directly (as with the thread sensor on the left in FIG. 2), or with a larger one Lever arm as the stop 35 shown.
  • the leg spring S with the coil spring turns 29 can Almost fill in the width of the recess 16.
  • the support leg 30 by one bent coil spring turn 30 'protrudes approximately parallel to the axle bolt 28, is inserted into an abutment in the storage body or another abutment, so that when moving from the outer to the inner position the entire length of the spring is used for the deformation.
  • the axle pin 28 is expedient set in the walls of the recess 16.
  • the freely projecting leg 31 ends in a fastening section 40, which is fixed in the block 32 of the sensing element body 32 is, for example according to FIG. 4.
  • a first upward bend 41 of the cantilevered leg 31 continues with another bend 42 continues, which runs approximately parallel to the axis 28 'and in an upward direction vertically angled part 43 runs out.
  • a transverse, open downward groove 38 is formed, in the middle of one penetrates in approximately vertical bore 39.
  • the bend 43 is in the bore 39th inserted, and e.g. glued, the bend 42 lies within the groove 38.
  • a leg spring is used as the damped leg spring S, which is constructed symmetrically with two end support legs 30, running between them Coil spring turns 29 and the double, freely projecting Leg 31 with its fastening section 40 '.
  • the axle pin 28 is in the coil spring turns 29 fitted.
  • the freely projecting leg 31 is over the Ramp 32 'continued with an extension 31', at the end of which the permanent magnet 33 is arranged.
  • the ramp 32 'could be directly by bending the Leg 31 may be shaped (or as a separate block according to FIG. 2).
  • Fig. 7 indicates in a diagram (spring force P over the deformation stroke, deformation angle ⁇ ) indicates that the spring S has a spring characteristic C that is linear and runs almost horizontally.
  • B hardly notices the force exerted by the spring too, e.g. only from 4.0 to 4.7 g. With a force of 4.0 g, the spring lies against the stop 35 on.
  • the damping of the spring S could be increased by an axle pin made of elastic material, through intermediate layers of elastic material between the coil spring angles, by one applied to the coil spring windings Covering (hose) or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Springs (AREA)
  • Looms (AREA)
  • Tape Measures (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Claims (16)

  1. Appareil d'alimentation en fil (F), comportant un corps formant élément de détection (19, 19', 20) d'un corps accumulateur (15) comportant un capteur de détection du fil sans contact, pour une réserve de fil, constituée par des spires (26), le corps formant élément de détection étant monté de manière à être déplaçable dans le corps accumulateur entre une position intérieure (B) et une position extérieure (A), autour d'un axe de pivotement (28') et étant chargé par au moins un ressort amorti (S) en direction de la position extérieure (A), caractérisé en ce que le ressort (S) est un ressort à branches comportant plusieurs spires de ressort hélicoïdal (29), qui définissent l'axe de pivotement (28') du corps formant élément de détection (19, 19', 20), et une branche (31) qui est disposée librement en porte-à-faux et porte le corps formant élément de détection.
  2. Appareil d'alimentation en fil selon la revendication 1, caractérisé en ce que le ressort à branches (S) comporte au moins à l'intérieur d'une zone de déformation entre la position intérieure et la position extérieure (A, B) - une courbe caractéristique largement linéaire (C), qui augmente seulement faiblement et de préférence est presque horizontale.
  3. Appareil d'alimentation en fil selon la revendication 1, caractérisé en ce qu'un goujon d'axe (28) est disposé à l'intérieur des spires (29) du ressort hélicoïdal.
  4. Appareil d'alimentation en fil selon la revendication 3, caractérisé en ce que l'axe de pivotement (28') ou le goujon d'axe (28) est orienté approximativement dans la direction circonférentielle du corps accumulateur en forme de tambour (13, 15).
  5. Appareil d'alimentation en fil selon la revendication 1, caractérisé en ce que le ressort à branches est agencé et disposé de telle sorte que le ressort est déformé lors du déplacement de l'élément de détection (32, 32') à partir de la position extérieure (A), et ce au niveau de ses spires (29) du ressort hélicoïdal, dans le sens de l'ouverture.
  6. Appareil d'alimentation en fil selon la revendication 1, caractérisé en ce qu'une butée (35), qui définit la position extérieure (A), pour la branche (31) ou pour le corps formant élément de détection est prévue dans le corps accumulateur (13, 15) et que le ressort à branches est précontraint, dans la position extérieure (A), contre la butée (35), de préférence avec une force de précontrainte, qui est seulement légèrement inférieure à la force du ressort dans la position intérieure.
  7. Appareil d'alimentation en fil selon la revendication 1, caractérisé en ce qu'au moins une branche d'appui (30) du ressort à branches est fixée dans le corps accumulateur.
  8. Appareil d'alimentation en fil selon la revendication 7, caractérisé en ce que la branche d'appui (30) est prévue sur une extrémité des spires (29) du ressort hélicoïdal et que la branche (31), qui est librement en porte-à-faux, est prévue sur l'autre extrémité des spires (29) du ressort hélicoïdal.
  9. Appareil d'alimentation en fil selon l'une des revendications 1 à 8, caractérisé en ce que le corps de l'élément de détection (19, 19', 20) comporte un bloc (32) possédant une rampe (36) située au niveau de sa face supérieure et, au niveau de sa face inférieure (37) située à l'opposé de la rampe (36), une rainure transversale (38) et un perçage de retenue (39) approximativement perpendiculaire à la rainure transversale (38) et prévu pour une extrémité (40) recourbée en forme de Z de la branche (31) qui est librement en porte-à-faux.
  10. Appareil d'alimentation en fil selon au moins l'une des revendications 1 à 9, caractérisé en ce que le corps formant élément de détection (19, 19', 20) est équipé du ressort à branches (S) et disposé dans un canal ouvert en forme de U (16), ouvert vers l'extérieur, du corps accumulateur (15) entre les parois du canal et que le goujon d'axe (28) prend appui dans les parois du canal.
  11. Appareil d'alimentation en fil selon la revendication 10, caractérisé en ce que dans le canal (16) est prévu un capot (34) situé sur le côté extérieur, possédant de préférence une section transversale en forme de U, pour les spires (29) du ressort hélicoïdal, capot sur lequel est prévu de préférence la butée (35) qui définit la position extérieure (A).
  12. Appareil d'alimentation en fil selon au moins l'une des revendications 1 à 11, caractérisé en ce que le diamètre extérieur du goujon d'axe (28) correspond essentiellement au diamètre intérieur des spires (29) du ressort hélicoïdal lorsque le corps formant élément de détection est dans la position extérieure (A).
  13. Appareil d'alimentation en fil selon la revendication 1, caractérisé en ce que le ressort à branches comporte deux branches d'appui (30) situées au niveau des deux extrémités extérieures des spires (29) du ressort hélicoïdal et que la branche librement en porte-à-faux (31) est prévue en double et est disposée dans une partie médiane des spires (29) du ressort hélicoïdal.
  14. Appareil d'alimentation en fil selon au moins l'une des revendications 1 à 13, caractérisé en ce que la branche (31), qui est librement en porte-à-faux et porte le corps formant élément de détection, s'étend obliquement vers l'extérieur à partir de la face inférieure des spires (29) du ressort hélicoïdal, qui est située à l'opposé de la surface du corps accumulateur (4).
  15. Appareil d'alimentation en fil selon au moins l'une des revendications précédentes, caractérisé en ce que le corps formant élément de détection contient au moins un aimant permanent (33) intégré du point de vue construction.
  16. Appareil d'alimentation en fil selon au moins l'une des revendications précédentes, caractérisé en ce que la branche librement en porte-à-faux (31) porte, à proximité de son extrémité libre, un aimant permanent (33) et qu'une rampe (32') ou le corps formant élément de détection (32) est disposé plus près de l'axe de pivotement (28') que ne l'est l'aimant permanent (33).
EP97116577A 1996-09-23 1997-09-23 Appareil fournisseur de fil Expired - Lifetime EP0831049B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19639036A DE19639036A1 (de) 1996-09-23 1996-09-23 Fadenliefergerät
DE19639036 1996-09-23

Publications (3)

Publication Number Publication Date
EP0831049A2 EP0831049A2 (fr) 1998-03-25
EP0831049A3 EP0831049A3 (fr) 1998-06-10
EP0831049B1 true EP0831049B1 (fr) 2001-12-12

Family

ID=7806634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97116577A Expired - Lifetime EP0831049B1 (fr) 1996-09-23 1997-09-23 Appareil fournisseur de fil

Country Status (2)

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EP (1) EP0831049B1 (fr)
DE (2) DE19639036A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20050810A1 (it) * 2005-11-18 2007-05-19 Lgl Electronics Spa Rilevatore di scorta trama per dispositivi alimentatori di trama

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171516B1 (fr) * 1984-08-16 1989-03-08 Aktiebolaget Iro Dispositif pour emmagasiner et délivrer un fil
US5211347A (en) * 1990-06-29 1993-05-18 Sobrevin Societe De Brevets Industriels-Etablissement Thread feed device

Also Published As

Publication number Publication date
DE59705750D1 (de) 2002-01-24
EP0831049A2 (fr) 1998-03-25
EP0831049A3 (fr) 1998-06-10
DE19639036A1 (de) 1998-03-26

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