EP3115489B1 - Dispositif d'arrêt d'alimentation de faisceau de fibres pour métier à tisser - Google Patents

Dispositif d'arrêt d'alimentation de faisceau de fibres pour métier à tisser Download PDF

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Publication number
EP3115489B1
EP3115489B1 EP16175183.9A EP16175183A EP3115489B1 EP 3115489 B1 EP3115489 B1 EP 3115489B1 EP 16175183 A EP16175183 A EP 16175183A EP 3115489 B1 EP3115489 B1 EP 3115489B1
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EP
European Patent Office
Prior art keywords
fiber bundle
teeth
roving
feed
pierce
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Active
Application number
EP16175183.9A
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German (de)
English (en)
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EP3115489A1 (fr
Inventor
Yoshimasa Fujii
Takahisa Ishii
Tsutomu Nakano
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Toyota Industries Corp
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Toyota Industries Corp
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Publication of EP3115489A1 publication Critical patent/EP3115489A1/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • D01H13/188—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only by cutting or clamping yarns or rovings
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies

Definitions

  • the present invention relates to a fiber bundle feed stopping device for a spinning frame that stops feeding a drafting device with a fiber bundle.
  • a spinning frame spins yarn from a roving or a sliver.
  • spinning is simultaneously performed by a plurality of spindles.
  • the yarn-broken spindle During spinning, when a yarn breaks, spinning is stopped at the spindle where the yarn was broken (hereafter referred to as "the yarn-broken spindle") but continued at the other spindles.
  • One type of a spinning frame continues to feed a drafting device that corresponds to the yarn-broken spindle with a fiber bundle that is drawn in and collected when discharged from the drafting device.
  • There is another type of spinning frame that includes a stopping device to stop feeding the drafting device that corresponds to the yarn-broken spindle with a fiber bundle.
  • Japanese Laid-Patent Publication No. 48-4727 describes a roving cutting device that includes a plurality of long tapered needles.
  • the roving cutting device of Japanese Laid-Open Patent Publication No. 48-4727 , to stop feeding a roving to the drafting device corresponding to the yarn-broken spindle, the roving is cut at the upstream side of the drafting device in the feed direction of the roving. More specifically, the roving cutting device performs an operation in which the tapered needles pierce the roving fed to the drafting device corresponding to the yarn-broken spindle at the upstream side of the drafting device. In this case, the drafting device is continuously driven, and the roving is moved along the tapered needles toward the base of each needle. This keeps the tapered needles in the roving so that the roving is not released from the needles.
  • the roving at the upstream side of the tapered needles is blocked (obstructed) by the tapered needles, and the roving at the downstream side of the tapered needles is pulled by the drafting device and cut by the tapered needles. This stops feeding the drafting device of the yarn-broken spindle with the roving.
  • the tapered needles pierce the roving and block the fed roving with the tapered needles to cut the roving. Accordingly, the movement resistance produced between the roving and the tapered needles increases the load applied to the tapered needles. Thus, when the roving passes through the tapered needles, the tapered needles are apt to deform and break. Further, since the tapered needles pierce the roving, fibers of the roving has a tendency to collect between adjacent tapered needles. This results in the need to often remove the collected fibers from between the adjacent tapered needles and lowers the maintenance efficiency of the roving cutting device.
  • US 1 305 540 A , US 2 734 335 A and US 1 103 329 A likewise relate to fiber bundle feed stopping devices for a spinning frame.
  • the fiber bundle feed stopping device stops feeding a drafting device with a fiber bundle and is provided with an untwisting mechanism including a fiber bundle guide and teeth.
  • the fiber bundle guide is located at an upstream side of a back roller of the drafting device in a feed direction of the fiber bundle to guide the fiber bundle to the back roller.
  • the teeth are arranged next to one another in a direction intersecting the feed direction of the fiber bundle. The teeth pierce the fiber bundle to an intermediate part of the fiber bundle without extending out of the fiber bundle in a state in which the fiber bundle guide regulates where the fiber bundle is positioned.
  • the fiber bundle feed stopping device 30 stops feeding a drafting device 10 with a roving S1, which serves as a fiber bundle.
  • the drafting device 10 is of a three-roller configuration and includes front rollers 11, aprons 13 that run around middle rollers 12, and back rollers 14.
  • the front rollers 11 include a front bottom roller 11a and a front top roller 11b.
  • the middle rollers 12 include a middle bottom roller 12a and a middle top roller 12b.
  • a bottom apron 13a runs around the middle bottom roller 12a, and a top apron 13b runs around the middle top roller 12b.
  • the back rollers 14 include a back bottom roller 14a and a back top roller 14b.
  • the front bottom roller 11a is supported by a roller stand 15.
  • the middle bottom roller 12a is supported on the roller stand 15 by a middle bottom roller support 16 and a bearing (not shown).
  • the back bottom roller 14a is supported on the roller stand 15 by a back bottom roller support 17 and a bearing (not shown).
  • the middle bottom roller support 16 and the back bottom roller support 17 are each fixed to the roller stand 15 in a manner allowing for adjustment of the positions of the middle bottom roller support 16 and the back bottom roller support 17 relative to the roller stand 15 in the front-rear direction of the frame (lateral direction in Fig. 1 ).
  • the front top roller 11b, the middle top roller 12b, and the back top roller 14b are respectively supported by top roller supports (not shown) on the weighting arm 18.
  • a support bar 21 extends behind and parallel to the back bottom roller 14a.
  • a trumpet 22 is fixed to the support bar 21 to guide the roving S1.
  • the roving S1 is fed from a roving winding, which is suspended from a creel (not shown), through the trumpet 22 and to the back rollers 14.
  • Afiber bundle feed stopping device 30 is arranged at the rear of the trumpet 22 (back rollers 14).
  • the fiber bundle feed stopping device 30 includes an untwisting mechanism 31 located at the upstream side of the back rollers 14 in the feed direction of the roving S1 to untwist the roving S1 that is fed to the drafting device 10.
  • the untwisting mechanism 31 includes a fiber bundle guide 32 at the upstream side of the back rollers 14 in the feed direction of the roving S1.
  • the fiber bundle guide 32 guides the roving S1 to the back rollers 14.
  • the fiber bundle guide 32 is generally bow-shaped as a whole in a side view.
  • the fiber bundle guide 32 includes a curved portion 32a that is curved like an arc and bulged toward the outer side.
  • the curved portion 32a and the trumpet 22 (back rollers 14) are directed toward opposite directions.
  • the fiber bundle guide 32 includes a recessed portion 32b and a flanged portion 32c.
  • the recessed portion 32b is continuous with one end (lower end in Fig.
  • the fiber bundle guide 32 also includes an extending portion 32d that is continuous with the end (upper end in Fig. 2 ) of the curved portion 32a at the opposite side of the recessed portion 32b.
  • the recessed portion 32b is supported by a support (not shown) on the weighting arm 18.
  • the roving S1 contacts the outer circumferential surface of the curved portion 32a near the recessed portion 32b and the edge of the flanged portion 32c near the recessed portion 32b. Accordingly, the fiber bundle guide 32 includes two contact portions that contact the roving S1. The two contact portions, namely, the curved portion 32a and the flanged portion 32c, are spaced apart from each other in the feed direction of the roving S1. Tension is applied to the roving S1 to urge the roving S1 toward the fiber bundle guide 32 and abut against the two locations, namely, the curved portion 32a and the flanged portion 32c. In this manner, the fiber bundle guide 32 regulates the position of the roving S1.
  • the untwisting mechanism 31 includes an untwisting member 33 provided with rows of teeth 33a. Each row of teeth 33a extends in a direction orthogonal to the feed direction of the roving S1.
  • the untwisting member 33 includes a main body 33c.
  • the main body 33c includes the teeth 33a and a flat surface (base surface 33b) from which the teeth 33a project.
  • the main body 33c also includes a rotation shaft 33d. Rotation of the rotation shaft 33d pivots the untwisting member 33 about the rotation axis of the rotation shaft 33d.
  • a plurality of (four in the present embodiment) teeth rows are arranged next to one another in the feed direction of the roving S1 on the base surface 33b.
  • the teeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to the teeth 33a in the teeth row that is adjacent in the feed direction. Accordingly, in a plan view, the teeth 33a are in a zigzagged arrangement on the base surface 33b.
  • the projecting length H1 of the teeth 33a from the base surface 33b is 1.0 mm.
  • the projecting length H1 is the length of a straight line connecting the base surface 33b and the distal end of a tooth 33a over the minimum distance.
  • the roving S1 of the present embodiment shown in Fig. 2 has a thickness of 2.0 mm.
  • the untwisting member 33 is pivotal between a fiber bundle release position, which is shown by the broken lines, and a fiber bundle pierce position, which is shown by the solid lines.
  • the untwisting mechanism 31 includes a switching device 35 (refer to Fig. 1 ) used to switch the untwisting member 33 between the fiber bundle release position and the fiber bundle pierce position.
  • a controller (not shown) controls the switching device 35 based on a detection signal from a yarn breakage sensor (not shown).
  • the configuration of the switching device 35 is not particularly limited.
  • the switching device 35 need only be configured to switch the untwisting member 33 between the fiber bundle release position and the fiber bundle pierce position under the control of the controller based on the detection signal of the yarn breakage sensor.
  • the teeth 33a When the untwisting member 33 is pivoted to the fiber bundle pierce position, the teeth 33a pierce the roving S1.
  • the teeth 33a pierce the roving S1 to an intermediate part of the roving S1 but do not extend out of the roving S1.
  • the gap H3 between the distal ends of the teeth 33a and the fiber bundle guide 32 is 1.0 mm.
  • the projecting length H1 of the teeth 33a from the base surface 33b and the positions of the fiber bundle guide 32 and the untwisting member 33 are set in advance so that the gap H3 is 1.0 mm between the distal ends of the teeth 33a and the fiber bundle guide 32.
  • Each tooth 33a includes a ridgeline 331a extending along the upstream side in the feed direction of the roving S1 when pierced into the roving S1.
  • the angle ⁇ 1 is 90 degrees between the ridgeline 331a and the base surface 33b at the upstream side in the feed direction of the roving S1.
  • a state in which there are no broken yarns includes a state in which spinning is performed when the roving S1 is fed via the fiber bundle guide 32 to the drafting device 10 and a state before spinning starts in which the roving S1 is not yet fed to the drafting device 10.
  • the controller does not determine whether or not a yarn has broken since the yarn breakage sensor does not yet detect for a yarn breakage, and the switching device 35 does not pivot the untwisting member 33 to the fiber bundle pierce position.
  • the roving S1 is guided from the roving winding, which is suspended from the creel (not shown), to the fiber bundle guide 32 and the trumpet 22 and fed to the back rollers 14.
  • the roving S1 fed to the back rollers 14 is drafted into fleece between the back rollers 14 and the aprons 13 and between the aprons 13 and the front rollers 11. Yarn is formed from the fleece.
  • the yarn is guided to a snail wire (not shown) and a traveler (not shown) and wound around a bobbin (not shown).
  • the yarn-broken spindle is located from the detection signal of each wire breakage sensor, and the controller drives the switching device 35 of the untwisting mechanism 31 corresponding to the yarn-broken spindle.
  • the switching device 35 pivots the untwisting member 33 from the fiber bundle release position to the fiber bundle pierce position, and the teeth 33a pierce the portion of the roving S1 located between the curved portion 32a and the flanged portion 32c in the feed direction of the roving S1.
  • the tension applied to the portion of the roving S1 between the curved portion 32a and the flanged portion 32c allows the teeth 33a to easily pierce this portion.
  • the fiber bundle guide 32 regulates the position of the roving S1.
  • the teeth 33a remain in a state piercing the roving S1 to the intermediate part and do not extend out of the roving S1. This keeps the roving S1 on the teeth 33a. Further, as the drafting device 10 continues to operate and the roving S1 passes through the teeth 33a, the teeth 33a comb and untwist the roving S1.
  • the teeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to the teeth 33a in the teeth row that is adjacent in the feed direction of the roving S1.
  • This facilitates the separation of fibers S2 in the roving S1 with the teeth 33a and efficiently untwists the roving S1.
  • the teeth 33a weaken the bonding of the fibers S2 and decrease the strength of the roving S1.
  • the roving S1 pulled by the drafting device 10 is cut between the back rollers 14 and the untwisting mechanism 31. This stops feeding the roving S1 to the drafting device 10 of the spindle where a yarn was broken.
  • the angle ⁇ 1 between the ridgeline 331a of each tooth 33a and the base surface 33b at the upstream side in the feed direction of the roving S1 need only be 90 degrees or less.
  • the angle ⁇ 1 may be smaller than 90 degrees.
  • the angle ⁇ 1 between the ridgeline 331a of each tooth 33a and the base surface 33b at the upstream side in the feed direction of the roving S1 may be greater than 90 degrees.
  • the teeth 33a in each teeth row do not have to be shifted by one-half of a teeth pitch relative to the teeth 33a in the teeth row that is adjacent in the feed direction of the roving S1.
  • the teeth 33a of each teeth row may be arranged without being shifted from the teeth 33a in other teeth rows.
  • the teeth 33a only need to be arranged next to one another in a direction intersecting the feed direction of the roving S1 and do not have to be arranged in a direction orthogonal to the feed direction of the roving S1.
  • the projecting length H1 of the teeth 33a from the base surface 33b and the positions of the fiber bundle guide 32 and the untwisting member 33 may be changed in accordance with the thickness H2 of the roving S1.
  • the teeth 33a need only pierce the roving S1 without extending out of the roving S1 when the untwisting member 33 is arranged at the fiber bundle pierce position.
  • the untwisting member 33 pivots between the fiber bundle release position and the fiber bundle pierce position.
  • the untwisting member 33 may be moved straight between the fiber bundle release position and the fiber bundle pierce position.
  • the fiber bundle is not limited to the roving S1 and may be a sliver.
  • the fiber bundle feed stopping device 30 may be used in a ring spinning frame that spins yarns from a sliver with a drafting device, which drafts a fiber bundle at a draft ratio that is much larger than the typical three-roller drafting device.
  • the spinning frame is not limited to a ring spinning frame and may be, for example, a faced yarn spinning machine or a friction spinning machine.
  • the spinning frame may be a roving frame.

Claims (8)

  1. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) pour un métier à tisser, dans lequel le dispositif d'arrêt d'alimentation de faisceau de fibres (30) est approprié pour un faisceau de fibres (S1) ayant une épaisseur (H2) et est capable d'arrêter l'alimentation d'un dispositif d'étirage (10) avec le faisceau de fibres (S1), le dispositif d'arrêt d'alimentation de faisceau de fibres (30) comprend :
    un mécanisme de desserrage (31) comprenant :
    un guide de faisceau de fibres (32) configuré pour être positionné d'un côté en amont d'un rouleau porte-fil (14) du dispositif d'étirage (10) dans une direction d'alimentation du faisceau de fibres (S1) pour guider le faisceau de fibres (S1) jusqu'au rouleau porte-fil (14), et
    un élément de desserrage (33) prévu avec au moins une rangée de dents (33a) qui percent le faisceau de fibres (S1), les dents (33a) étant agencées les unes à côté des autres dans une direction coupant la direction d'alimentation du faisceau de fibres (S1) à alimenter entre le guide de faisceau de fibres (32) et l'élément de desserrage (33),
    dans lequel l'élément de desserrage (33) comprend un corps principal (33c) ayant une surface de base plate (33b) à partir de laquelle les dents (33a) font saillie, la longueur en saillie (H1) des dents (33a) à partir de la surface de base (33b) est inférieure à l'épaisseur (H2) du faisceau de fibres (S1) de sorte que les dents (33a) ne percent que le faisceau de fibres (S1) sans s'étendre hors du faisceau de fibres (S1) lorsque l'élément de desserrage (33) est agencé dans une position de perçage de faisceau de fibres, laissant ainsi un espace (H3) entre les extrémités distales des dents (33a) et le guide de faisceau de fibres (32),
    dans lequel l'élément de desserrage (33) est configuré de sorte que, lorsque l'élément de desserrage (33) est dans la position de perçage de faisceau de fibres, alors que le dispositif d'étirage (10) est entraîné, les dents (33a) percent le faisceau de fibres (S1) et permettent au faisceau de fibres (S1) de se déplacer à travers les dents (33a), peignant et desserrant ainsi le faisceau de fibres (S1).
  2. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon la revendication 1, caractérisé en ce que :
    le guide de faisceau de fibres (32) comprend deux parties de contact (32a, 32c) qui sont en contact avec le faisceau de fibres (S1), dans lequel :
    les deux parties de contact (32a, 32c) sont agencées à distance l'une de l'autre dans la direction d'alimentation du faisceau de fibres (S1), et
    les dents (33a) percent le faisceau de fibres (S1) à un emplacement entre les deux parties de contact (32a, 32c).
  3. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon la revendication 2, caractérisé en ce que le guide de faisceau de fibres (32) comprend une partie évidée (32b) entre les deux parties de contact (32a, 32c).
  4. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les dents (33a) sont agencées dans une pluralité de rangées de dents posées les unes à côté des autres dans la direction d'alimentation du faisceau de fibres (S1).
  5. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon la revendication 4, caractérisé en ce que les dents (33a) dans chaque rangée de dents sont décalées selon une moitié d'un pas de dents par rapport aux dents (33a) dans la rangée de dents qui est adjacente à la direction d'alimentation du faisceau de fibres (S1).
  6. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que :
    la surface de base est une surface plate (33b) ;
    les dents (33a) comprennent chacune une ligne de crête (331a) s'étendant le long d'un côté en amont dans la direction d'alimentation du faisceau de fibres (S1) lors du perçage dans le faisceau de fibres (S1) ; et
    un angle (θ1) entre la ligne de crête (331a) et la surface plate (33b) du côté en amont dans la direction d'alimentation est de 90 degrés ou moins.
  7. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon la revendication 2, dans lequel :
    le guide de faisceau de fibres (32) comprend une partie évidée (32b) entre les deux parties de contact (32a, 32c) dans la direction d'alimentation du faisceau de fibres (S1),
    l'élément de desserrage (33) a un arbre de rotation (33d) autour duquel l'élément de desserrage (33) est pivoté entre une position de libération de faisceau de fibres et la position de perçage de faisceau de fibres, et
    dans la position de perçage de faisceau de fibres, les dents (33a) percent la partie du faisceau de fibres (S1) positionnée au niveau de la partie évidée (32b) entre deux parties de contact (32a, 32c) dans la direction d'alimentation du faisceau de fibres (S1).
  8. Dispositif d'arrêt d'alimentation de faisceau de fibres (30) selon l'une quelconque des revendications 1 à 7, dans lequel un organe de commande est configuré pour commander un dispositif de commutation (35) basé sur un signal de détection provenant d'un capteur de rupture de fil.
EP16175183.9A 2015-07-08 2016-06-20 Dispositif d'arrêt d'alimentation de faisceau de fibres pour métier à tisser Active EP3115489B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015136912A JP6332175B2 (ja) 2015-07-08 2015-07-08 紡機の繊維束供給停止装置

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Publication Number Publication Date
EP3115489A1 EP3115489A1 (fr) 2017-01-11
EP3115489B1 true EP3115489B1 (fr) 2020-12-23

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EP (1) EP3115489B1 (fr)
JP (1) JP6332175B2 (fr)
CN (1) CN106337223B (fr)
ES (1) ES2854423T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7151039B2 (ja) * 2019-06-18 2022-10-12 株式会社豊田自動織機 精紡機
CN110344144A (zh) * 2019-08-13 2019-10-18 上海兰宝传感科技股份有限公司 一种粗纱停喂装置的带齿锁罩

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734335A (en) * 1956-02-14 Strand interrupting and feeding apparatus
US1305540A (en) * 1919-06-03 Roving-holder
US1103329A (en) * 1913-12-04 1914-07-14 Edward J Vales Roving-stop for spinning-frames.
GB476170A (en) * 1936-05-28 1937-11-29 Fairbairn Lawson Combe Barbour Improvements in rove stop mechanism for spinning, twisting and like machines used inthe preparation of fibrous substances
JPS564727A (en) * 1979-06-20 1981-01-19 Toray Industries Crude yarn and production thereof
JPH06228832A (ja) * 1993-02-02 1994-08-16 Howa Mach Ltd 精紡機の粗糸供給停止装置
EP2520697B1 (fr) * 2011-05-06 2014-04-09 Vantex Technologies GmbH Dispositif d'arrêt d'approvisionnement de mèche dans un appareil de filature
JP5979121B2 (ja) * 2013-11-18 2016-08-24 株式会社豊田自動織機 紡機の繊維束供給停止装置

Non-Patent Citations (1)

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Title
None *

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Publication number Publication date
ES2854423T3 (es) 2021-09-21
CN106337223A (zh) 2017-01-18
JP6332175B2 (ja) 2018-05-30
EP3115489A1 (fr) 2017-01-11
CN106337223B (zh) 2018-12-07
JP2017020123A (ja) 2017-01-26

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