EP2216432B1 - Procédé de traitement de fils et fileuse - Google Patents

Procédé de traitement de fils et fileuse Download PDF

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Publication number
EP2216432B1
EP2216432B1 EP09178604.6A EP09178604A EP2216432B1 EP 2216432 B1 EP2216432 B1 EP 2216432B1 EP 09178604 A EP09178604 A EP 09178604A EP 2216432 B1 EP2216432 B1 EP 2216432B1
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EP
European Patent Office
Prior art keywords
yarn
spun
spun yarn
accumulating roller
accumulated
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.)
Not-in-force
Application number
EP09178604.6A
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German (de)
English (en)
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EP2216432A1 (fr
EP2216432B2 (fr
Inventor
Masaki Oka
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Murata Machinery Ltd
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Murata Machinery Ltd
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Publication of EP2216432B1 publication Critical patent/EP2216432B1/fr
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Publication of EP2216432B2 publication Critical patent/EP2216432B2/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
    • D01H9/08—Doffing arrangements independent of spinning or twisting machines
    • 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

Definitions

  • the present invention relates to a yarn processing method and a spinning machine. More specifically, the present invention relates to a method and a structure for feeding spun yarn from a spinning device by a yarn accumulating roller.
  • Japanese Unexamined Patent Application Publication No. 2004-124333 discloses a spinning machine including a spinning device, a delivery roller, a yarn defect detecting device, and a yarn accumulating device (yarn slack eliminating device).
  • a nip roller is arranged to face the delivery roller. Spun yarn is nipped between the delivery roller and the nip roller. When the delivery roller is driven and rotated, tension directed to a downstream side of a yarn traveling direction is applied to the nipped spun yarn, and thus, the spun yarn is fed from the spinning device.
  • the yarn accumulating device is arranged downstream of the delivery roller, and includes a yarn accumulating roller (yarn slack eliminating roller) arranged to wind the spun yarn around an outer periphery thereof.
  • the yarn accumulating roller is driven and rotated to temporarily accumulate the spun yarn sequentially fed from the spinning device around the outer periphery thereof.
  • the yarn accumulating roller prevents slackening of the spun yarn generated during a yarn splicing operation.
  • the yarn defect detecting device is arranged between the delivery roller and the yarn accumulating device, and monitors a thickness of the spun yarn in order to detect a yarn defect in the spun yarn.
  • the spun yarn tends to slip on the nip roller due to an insufficient nipping force of the nip roller.
  • the yarn accumulating roller can stably pull (feed) the spun yarn as long as the yarn accumulating roller is driven and rotated under the state in which the spun yarn of sufficient length is wound around the outer periphery thereof.
  • the delivery roller may be omitted, and the spun yarn may be directly fed (pulled out) from the spinning device by the yarn accumulating device.
  • such a spinning machine including the above-described features will be referred to as a spinning machine without a delivery roller.
  • Such a spinning machine without a delivery roller can feed the spun yarn from the spinning device with more stable tension as compared with a spinning machine using a delivery roller. Therefore, it can be assumed that packages with consistent quality are formed.
  • a yarn accumulated amount on the yarn accumulating roller may become insufficient during a yarn splicing operation.
  • the following problem may occur. That is, since the spinning machine without a delivery roller directly feeds the spun yarn from the spinning device by the yarn accumulating device, when a force of the yarn accumulating device pulling the spun yarn changes, a quality of the yarn to be spun is greatly affected.
  • a stable state and an unstable state of a spinning quality of the spun yarn in the spinning device may be simply referred to as “stable” and “unstable”, respectively.
  • a yarn processing method comprising a yarn guiding step of guiding spun yarn fed from a spinning device to an outer peripheral surface of a yarn accumulating roller; an accumulated amount increasing step of feeding the spun yarn from the spinning device by winding the spun yarn around the outer peripheral surface of the yarn accumulating roller and increasing an accumulated amount of the spun yarn accumulated on the yarn accumulating roller as well as a spinning machine comprising a spinning device which forms a spun yarn by applying twists to a fiber bundle; a winding device which forms a package by winding the spun yarn fed from the spinning device and a yarn accumulating roller which winds the spun yarn around an outer peripheral surface thereof and rotates with the spun yarn wound around to feed the spun yarn from the spinning device while applying tension to the spun yarn is already known.
  • the accuracy of detecting the yarn defect during the yarn splicing operation may become insufficient, and moreover, the spun yarn with unstable quality may be wound into a package.
  • the present invention provides a spinning machine without a delivery roller that can prevent a portion having unstable yarn quality from being mixed into a package during a yarn splicing operation and a corresponding yarn processing method.
  • a yarn processing method includes a yarn catching step, a yarn hooking step, an accumulated amount increasing step, and a yarn disposing step.
  • a yarn catching step before winding spun yarn fed from a spinning device around a yarn accumulating roller, a yarn catching section sucks and catches the spun yarn.
  • the spun yarn extending from the spinning device to the yarn catching section is engaged with a yarn hooking section that is integrally rotated with the yarn accumulating roller, and thus the spun yarn is guided to an outer peripheral surface of the yarn accumulating roller.
  • the accumulated amount increasing step while feeding the spun yarn from the spinning device by winding the spun yarn around the outer peripheral surface of the yarn accumulating roller, an accumulated amount of the spun yarn accumulated on the yarn accumulating roller is increased.
  • the yarn disposing step after the accumulated amount reaches a prescribed amount, the spun yarn accumulated on the yarn accumulating roller is disposed while maintaining the accumulated amount to be at least the prescribed amount. After the yarn disposing step, the process proceeds to a subsequent operation.
  • yarn feeding tension is stabilized by winding at least a certain amount of the spun yarn around the yarn accumulating roller, and thus, the spun yarn can be stably fed from the spinning device.
  • the amount of the spun yarn on the yarn accumulating roller is insufficient, the spun yarn cannot be stably fed from the spinning device, and the yarn quality may become unstable, however, in the present invention, such occurrences of unstable yarn can be appropriately handled. That is, in the above-described yarn processing method, after a yarn portion having unstable yarn quality is once wound around the yarn accumulating roller so as to obtain a sufficient accumulated amount, while winding the spun yarn having stable quality, the unstable yarn portion may be disposed. Accordingly, when proceeding to the subsequent operation, only the stable spun yarn is accumulated on the yarn accumulating roller.
  • the following method is preferably adopted. That is, in the yarn disposing step, by removing the spun yarn from the yarn hooking section, the spun yarn accumulated on the yarn accumulating roller is sucked and disposed by the yarn catching section. Accordingly, by a simple operation of removing the yarn from the yarn hooking section, the spun yarn can be sucked and disposed by the yarn catching section.
  • the yarn hooking section when the tension is stabilized by winding at least the prescribed amount of the spun yarn engaged with the yarn hooking section, the yarn hooking section unwinds the spun yarn from the yarn accumulating roller.
  • the yarn disposing step by increasing a suction force of the yarn catching section, the yarn tension between the yarn catching section and the yarn hooking section is increased, and the spun yarn accumulated on the yarn accumulating roller is sucked and disposed. Accordingly, since the yarn catching section can suck and dispose the spun yarn simply by increasing the suction force of the yarn catching section, a special movable member is not necessary for disposing the spun yarn, which thereby can reduce a cost.
  • a spinning machine includes a spinning device, a winding device, a yarn accumulating roller, a yarn hooking section, and an accumulated yarn disposing section.
  • the spinning device forms spun yarn by applying twists to a fiber bundle.
  • the winding device forms a package by winding the spun yarn fed from the spinning device.
  • the yarn accumulating roller winds the spun yarn around an outer peripheral surface thereof and rotates with the spun yarn wound around to feed the spun yarn from the spinning device while applying tension to the spun yarn.
  • the yarn hooking section can be engaged with the spun yarn, and rotates integrally with the yarn accumulating roller while being engaged with the spun yarn to wind the spun yarn around the outer peripheral surface of the yarn accumulating roller.
  • the accumulated yarn disposing section disposes the spun yarn wound around the yarn accumulating roller.
  • the feeding tension is stabilized by winding at least a certain amount of the spun yarn around the yarn accumulating roller, and the spun yarn can be stably fed from the spinning device.
  • the amount of the spun yarn on the yarn accumulating roller is insufficient, the spun yarn may not be stably fed from the spinning device, and the quality of the spun yarn may become unstable.
  • such occurrences of unstable spinning operation can be appropriately handled. That is, according to the structure of the present invention, after a yarn portion having unstable spinning quality is once wound around the yarn accumulating roller so as to obtain a sufficient accumulated amount, while winding the spun yarn having stable quality, the unstable yarn portion can be disposed. Accordingly, only the stable spun yarn is accumulated on the yarn accumulating roller. Therefore, since the unstable portion of the spun yarn can be prevented from being mixed into a package, packages with good quality can be formed.
  • the accumulated yarn disposing section is a yarn removing member.
  • the yarn removing member is arranged downstream of the yarn hooking section in a yarn feeding direction, and can be moved between a first position where the yarn removing member does not make contact with the spun yarn and a second position where the yarn removing member makes contact with the spun yarn.
  • the yarn removing member removes the spun yarn from the yarn hooking section. Accordingly, by a simple structure of moving the yarn removing member, the spun yarn can be removed from the yarn hooking section, and the unstable portion of the spun yarn can be unwound from the yarn accumulating roller.
  • the spinning device includes a yarn removal driving section that drives the yarn removing member.
  • the yarn removal driving section moves the yarn removing member to the first position. After at least the prescribed amount of the spun yarn is wound around the yarn accumulating roller, the yarn removal driving section moves the yarn removing member to the second position.
  • the spun yarn on the yarn accumulating roller can be unwound. Accordingly, the unstable portions of the spun yarn on the yarn accumulating roller are sequentially replaced with portions having stable quality, and after all the unstable yarn portions are unwound, only the spun yarn stably fed from the spinning device is wound around the yarn accumulating roller.
  • the spinning machine includes a yarn defect detecting device that monitors a presence or an absence of a yarn defect in the spun yarn.
  • the yarn defect detecting device temporarily stops the monitoring of the yarn defect. After at least the prescribed amount of the spun yarn is wound on the yarn accumulating roller, the yarn defect detecting device restarts the monitoring of the yarn defect.
  • the monitoring of the yarn defect is started under the state in which a sufficient amount of the spun yarn has not been wound on the yarn accumulating roller, an accurate detection result cannot be expected due to unstable yarn tension.
  • the structure of the present invention if the yarn amount on the yarn accumulating roller is insufficient, the monitoring of the yarn defect is temporarily stopped, and after the spun yarn is sufficiently wound on the yarn accumulating roller so as to stably feed the spun yarn from the spinning device, the monitoring of the yarn defect can be restarted. Accordingly, after the unstable portions are unwound, only the spun yarn in which the presence and/or the absence of the yarn defect has been properly detected is wound on the yarn accumulating roller. Moreover, since the monitoring of the yarn defect may be performed only after the yarn tension becomes stable, it is not necessary to change a setting for yarn defect detection for when the yarn tension is unstable, and a control operation can be simplified.
  • the yarn removal driving section preferably moves back the yarn removing member to the first position.
  • the spinning machine includes a yarn splicing device and a yarn catching section.
  • the yarn catching section catches the spun yarn from the spinning device by suction airflow and guides the spun yarn to the yarn splicing device.
  • the yarn removal driving section moves the yarn removing member to the second position.
  • the spun yarn can be unwound from the yarn accumulating roller.
  • the unstable portions of the spun yarn can be disposed. Accordingly, after the unstable portions are unwound and disposed, only the spun yarn stably fed from the spinning device is wound on the yarn accumulating roller. By performing the yarn splicing operation in this state, the unstable spun yarn can be prevented from being mixed into a package from the yarn accumulating roller.
  • the spinning machine includes a plurality of spinning units and an operation cart.
  • the spinning unit includes the spinning device, the winding device, the yarn accumulating roller, the yarn hooking section, and the yarn removing member.
  • the operation cart can travel among the plurality of spinning units, and includes the yarn removal driving section. Accordingly, it is not necessary to provide each of the spinning units with the yarn removal driving section, which thereby can reduce a cost.
  • Fig. 1 is a front view of an entire structure of a spinning machine according to an embodiment of the present invention.
  • Fig. 2 is a longitudinal cross-sectional view of the spinning machine.
  • Fig. 3 is a longitudinal cross-sectional view of a yarn accumulating device.
  • Fig. 4 is an external perspective view of the yarn accumulating device.
  • Fig. 5 is a longitudinal cross-sectional view illustrating a state in which a suction pipe and a suction mouth respectively catch an upper yarn and a lower yarn.
  • Fig. 6 is a longitudinal cross-sectional view illustrating a state that is immediately after the upper yarn and the lower yarn are guided to a splicer.
  • Fig. 7 is a longitudinal cross-sectional view illustrating a state that is immediately after a yarn accumulating roller starts winding of the spun yarn.
  • Fig. 8 is a longitudinal cross-sectional view illustrating a state in which the spun yarn is being accumulated on the yarn accumulating roller.
  • Fig. 9 is a longitudinal cross-sectional view illustrating a state in which an unstable portion of the yarn is being unwound from the yarn accumulating roller.
  • Fig. 10 is a graph schematically illustrating changes in yarn feeding tension from a spinning device and changes in an accumulated amount of the yarn on the yarn accumulating roller.
  • upstream and downstream respectively refer to upstream and downstream in a direction in which a yarn travels during a spinning operation.
  • a spinning machine 1 of Fig. 1 includes a plurality of aligned units (spinning units) 2.
  • the spinning machine 1 includes a yarn splicing cart 3, a blower box 80, and a motor box 5.
  • each of the spinning units 2 primarily includes a draft device 7, a spinning device 9, a yarn accumulating device 12, and a winding device 13, which are arranged in this order from the upstream to the downstream.
  • the draft device 7 is provided near an upper end of a frame 6 of the spinning machine 1.
  • the spinning device 9 spins a fiber bundle 8 fed from the draft device 7. After a spun yarn 10 fed from the spinning device 9 passes through a later-described yarn clearer 52, the spun yarn 10 is fed by the yarn accumulating device 12. Then, the spun yarn 10 is wound by the winding device 13 and formed into a package 45 (winding step) .
  • the draft device 7 drafts a sliver 15 into the fiber bundle 8. As illustrated in Fig. 2 , the draft device 7 includes a back roller 16, a third roller 17, a middle roller 19, and a front roller 20. Further, an apron belt 18 is wound around the middle roller 19.
  • the spinning device 9 is a pneumatic type that uses whirling airflow to apply twists to the fiber bundle 8 and forms the spun yarn 10.
  • the yarn accumulating device 12 is provided downstream of the spinning device 9.
  • the yarn accumulating device 12 includes a function of applying prescribed tension to the spun yarn 10 and feeding the spun yarn 10 from the spinning device 9.
  • the yarn accumulating device 12 also includes a function of preventing yarn slackening by accumulating the spun yarn 10 fed from the spinning device 9 during a yarn splicing operation or the like performed by the yarn splicing cart 3 (to be described later).
  • the yarn accumulating device 12 further includes a function of adjusting the tension such that a change in the tension at the winding device 13 (to be described later) is not transmitted to the spinning device 9. As illustrated in Fig.
  • the yarn accumulating device 12 includes a yarn accumulating roller 21, a yarn hooking member (yarn hooking section) 22, an upstream guide 23, an electric motor 25, a downstream guide 26, a yarn accumulated amount sensor (accumulated amount detecting section) 27, and a yarn removing lever (yarn removing member) 28.
  • the yarn hooking member 22 can be engaged with (can hook) the spun yarn 10. By integrally rotating with the yarn accumulating roller 21 while being engaged with the spun yarn 10, the yarn hooking member 22 can guide the spun yarn 10 to an outer peripheral surface of the yarn accumulating roller 21.
  • the yarn accumulating roller 21 can wind and accumulate the spun yarn 10 around the outer peripheral surface thereof.
  • the yarn accumulating roller 21 is rotationally driven at a constant rotation speed by the electric motor 25.
  • the spun yarn 10 guided to the outer peripheral surface of the yarn accumulating roller 21 by the yarn hooking member 22 is wound as if to tighten the yarn accumulating roller 21, and pulls the spun yarn 10 located upstream of the yarn accumulating device 12.
  • the yarn accumulating device 12 can sequentially pull out the spun yarn 10 from the spinning device 9.
  • a force of feeding (pulling) the spun yarn 10 from the spinning device 9 becomes stable. That is, as the amount of the spun yarn 10 wound around the outer peripheral surface of the yarn accumulating roller 21 increases, a contact area between the yarn accumulating roller 21 and the spun yarn 10 increases, and slips or the like are unlikely to occur. When at least a certain amount of the spun yarn 10 is accumulated on the yarn accumulating roller 21, such slips are less likely to occur.
  • the spun yarn 10 can be fed from the spinning device 9 at a stable speed without generating the slips or the like. Accordingly, since the spinning machine 1 according to the present embodiment can feed the spun yarn 10 with stable tension at stable speed by the yarn accumulating device 12, the spun yarn 10 with consistent quality can be produced.
  • the certain amount (which is the yarn accumulated amount that does not generate the slips and that stabilizes the force of feeding the spun yarn 10) may be referred to as a minimal accumulated amount.
  • the yarn accumulated amount sensor 27 contactlessly detects the accumulated amount of the spun yarn 10 on the yarn accumulating roller 21, and transmits a detection signal to a not-illustrated unit controller (control section).
  • the upstream guide 23 is arranged slightly upstream of the yarn accumulating roller 21.
  • the upstream guide 23 is a guide member that appropriately guides the spun yarn 10 to the outer peripheral surface of the yarn accumulating roller 21. Further, the upstream guide 23 includes a twist stopping function that prevents the twists of the spun yarn 10 transmitted from the spinning device 9 from being transmitted to the downstream of the upstream guide 23.
  • the downstream guide 26 is arranged slightly downstream of the yarn accumulating roller 21.
  • the downstream guide 26 is a guide member that guides the spun yarn 10 by regulating a path of the spun yarn 10 swung around by the rotating yarn hooking member 22 and stabilizing the yarn travel path located downstream thereof.
  • the yarn removing lever 28 is arranged in the vicinity of a downstream end of the yarn accumulating roller 21 and arranged upstream of the downstream guide 26.
  • the yarn removing lever 28 can be swung around a swing shaft 28b.
  • the yarn clearer (yarn defect detecting section) 52 is arranged at a position that is located on a front side of the frame 6 of the spinning machine 1 and between the spinning device 9 and the yarn accumulating device 12.
  • the spun yarn 10, which has been spun by the spinning device 9, passes through the yarn clearer 52 before being wound by the yarn accumulating device 12.
  • the yarn clearer 52 monitors a thickness of the traveling spun yarn 10. When a yarn defect of the spun yarn 10 is detected, the yarn clearer 52 transmits a yarn defect detection signal to the not-illustrated unit controller.
  • the yarn splicing cart 3 includes a splicer (yarn splicing device) 43, a suction pipe (accumulated yarn disposing section) 44, a suction mouth 46, an uplifting arm 47, and a pneumatic cylinder (yarn removal driving section) 49.
  • a splicer yarn splicing device
  • suction pipe accumulated yarn disposing section
  • suction mouth suction mouth
  • an uplifting arm 47 an uplifting arm 47
  • a pneumatic cylinder yarn removal driving section
  • the suction pipe 44 can vertically swing around a shaft.
  • the suction pipe 44 sucks and catches a yarn end (upper yarn) discharged from the spinning device 9, and then guides the yarn end to the splicer 43.
  • the suction mouth 46 can vertically swing around a shaft.
  • the suction mouth 46 sucks and catches a yarn end (lower yarn) from the package 45, which is supported by the winding device 13, and then the suction mouth 46 guides the yarn end to the splicer 43.
  • a detailed structure of the splicer 43 is omitted, the splicer 43 twists the yarn ends together by whirling airflow to splice the upper yarn and the lower yarn.
  • the uplifting arm 47 is arranged at a tip end portion of the pneumatic cylinder 49 defined as an actuator. By driving the pneumatic cylinder 49, the uplifting arm 47 is moved to an upper advanced position to press the yarn removing lever 28, and thus, the yarn removing lever 28 can be driven to move to a lifted position (refer to Fig. 9 ).
  • the winding device 13 includes a cradle arm 71 that is supported on a supporting shaft 70 in a manner that the cradle arm 71 can swing around the supporting shaft 70.
  • the cradle arm 71 can support a bobbin 48, around which the spun yarn 10 is wound, in a manner that the bobbin 48 can be rotated.
  • the winding device 13 includes a winding drum 72 and a traverse device 75.
  • the winding drum 72 is driven in contact with an outer peripheral surface of the bobbin 48 or the package 45, which is formed by winding the spun yarn 10 around the bobbin 48.
  • the traverse device 75 includes a traverse guide 76 that can be engaged with the spun yarn 10.
  • the yarn accumulating roller 21 is a roller member made from high abrasion-resistant material, and is fixed on a motor shaft 25a of the electric motor 25.
  • a side on which the yarn accumulating roller 21 has the yarn hooking member 22 will be referred to as a tip end, and a side on which the electric motor 25 is provided will be referred to as a base end.
  • An outer peripheral surface 21a of the yarn accumulating roller 21 includes a base-end taper portion 21b, a cylindrical portion 21c, and a tip-end taper portion 21d in this order from the base end to the tip end.
  • the cylindrical portion 21c slightly tapers toward the tip end.
  • the cylindrical portion 21c is flatly connected (without difference in level) with the taper portions 21b and 21d.
  • the size of the cylindrical portion 21c is appropriately determined.
  • the yarn accumulated amount sensor 27 faces the cylindrical portion 21c.
  • the yarn accumulated amount sensor 27 detects an accumulated amount of the spun yarn 10 wound around the yarn accumulating roller 21, and then transmits a detected yarn accumulated amount to the unit controller.
  • Each of the base-end taper portion 21b and the tip-end taper portion 21d has a slightly tapered shape with a larger diameter at a corresponding end side.
  • the base-end taper portion 21b smoothly moves the supplied spun yarn 10 from a larger diameter portion to a smaller diameter portion towards the cylindrical portion 21c so as to orderly wind the spun yarn 10 around the surface of the cylindrical portion 21c.
  • the tip-end taper portion 21d has a function of preventing a sloughing phenomenon in which the wound spun yarn 10 sloughs all at once when unwinding the spun yarn 10.
  • the tip-end taper portion 21d also has a function of sequentially rewinding the spun yarn 10 from the smaller diameter portion to the larger diameter portion at the end side so as to smoothly feed the spun yarn 10.
  • the yarn hooking member 22 on the tip end of the yarn accumulating roller 21 is arranged coaxially with the yarn accumulating roller 21.
  • the yarn hooking member 22 includes a flyer axis 33 and a flyer 38 fixed to a tip end of the flyer axis 33.
  • the flyer axis 33 is supported in a manner that the flyer axis 33 can be rotated relative to the yarn accumulating roller 21.
  • a permanent magnet is attached to either one of the flyer axis 33 and the yarn accumulating roller 21, and a magnetic hysteresis member is attached to another one of the flyer axis 33 and the yarn accumulating roller 21.
  • a resistance torque is generated against the rotation of the yarn hooking member 22 relative to the yarn accumulating roller 21 by these magnetic mechanisms.
  • the yarn hooking member 22 is rotated accompanying the rotation of the yarn accumulating roller 21 by the resistance torque, and as a result, the yarn hooking member 22 and the yarn accumulating roller 21 can be integrally rotated.
  • the yarn hooking member 22 is rotated relative to the yarn accumulating roller 21.
  • the flyer 38 is formed to appropriately curve towards the outer peripheral surface 21a of the yarn accumulating roller 21. Accordingly, the flyer 38 can be engaged with (can hook) the spun yarn 10.
  • the flyer 38 When the flyer 38 is rotated integrally with the yarn accumulating roller 21 under a state in which the spun yarn 10 is not wound around the yarn accumulating roller 21, the flyer 38 becomes engaged with the spun yarn 10.
  • the spun yarn 10 engaged with the rotating flyer 38 is swung around by the flyer 38, and guided to and wound around the outer peripheral surface 21a of the rotating yarn accumulating roller 21.
  • the spun yarn 10 wound around the yarn accumulating roller 21 will be described. After passing through the upstream guide 23, the spun yarn 10 is guided from the base end to the outer peripheral surface 21a, and then wound around the cylindrical portion 21c several times. Then, after passing through the flyer 38, the spun yarn 10 fed from the tip end of the outer peripheral surface 21a is fed downstream through the downstream guide 26.
  • the yarn hooking member 22 is rotated independently from the yarn accumulating roller 21, and thus, the spun yarn 10 is gradually unwound from the tip end of the yarn accumulating roller 21 via the flyer 38.
  • the yarn hooking member 22 is rotated integrally with the yarn accumulating roller 21. In such a case, the yarn hooking member 22 operates to prevent the spun yarn 10 from being unwound from the tip end of the rotating yarn accumulating roller 21.
  • the yarn accumulating device 12 When the yarn tension at the downstream side increases, the yarn accumulating device 12 unwinds the yarn. When the yarn tension decreases (i.e., when the yarn is likely to slacken), the yarn accumulating device 12 stops the unwinding of the yarn. Thus, the yarn accumulating device 12 can eliminate the yarn slackening and apply appropriate tension to the yarn. Moreover, since the yarn hooking member 22 operates to absorb changes in the tension applied to the spun yarn 10 located between the yarn accumulating device 12 and the winding device 13, such tension changes can be prevented from influencing on the spun yarn 10 located between the spinning device 9 and the yarn accumulating device 12. Thus, the spun yarn 10 can be fed at a more stable speed from the spinning device 9 by the yarn accumulating device 12.
  • the spun yarn 10 Since the yarn accumulating roller 21 is driven and rotated at a prescribed speed, the spun yarn 10 is wound around the base end of the yarn accumulating roller 21 at the prescribed speed. Accordingly, when the speed at which the spun yarn 10 is unwound from the tip end of the yarn accumulating roller 21 is greater than the speed at which the spun yarn 10 is wound around the base end, the yarn accumulated amount decreases. When the spun yarn 10 is not unwound from the tip end, the yarn accumulated amount gradually increases.
  • the yarn accumulating device 12 includes the yarn removing lever 28.
  • the yarn removing lever 28 is formed as a substantially L-shaped member having a horizontally arranged elongate portion (action portion 28a).
  • a base portion of the yarn removing lever 28 is supported on the swing shaft 28b, and the yarn removing lever 28 can be vertically swung around the swing shaft 28b between the lifted position and a lowered position.
  • the yarn removing lever 28 is located at the lowered position (first position or receded position, for example, as illustrated in Fig. 2 ), the yarn removing lever 28 is operated not to make contact with the yarn path of the spun yarn 10.
  • the action portion 28a presses up the yarn path of the spun yarn 10 so that the spun yarn 10 can be removed from the flyer 33.
  • the yarn removing lever 28 can normally be held at the lowered position.
  • the pneumatic cylinder 29 of the yarn splicing cart 3 is driven, the yarn removing lever 28 is pressed by the uplifting arm 47 to be moved to the lifted position.
  • the spun yarn 10 can be removed from the yarn hooking member 22.
  • the resistance i.e. the resistance torque applied to the yarn hooking member 22
  • the spun yarn 10 can be unwound from the yarn accumulating roller 21.
  • a feedback control is performed on the cradle arm 71 in accordance with a signal transmitted from the yarn accumulated amount sensor 27. Such an operation is specifically described below.
  • the tension applied to the spun yarn 10 (the spun yarn 10 located between the yarn accumulating device 12 and the winding device 13) hooked on the yarn hooking member 22 is defined by a yarn feeding speed of the yarn accumulating roller 21 (i.e., by a spinning speed of the spinning device 9) and a winding speed of the winding device 13.
  • a yarn feeding speed of the yarn accumulating roller 21 i.e., by a spinning speed of the spinning device 9
  • the tension applied to the spun yarn 10 increases, and the spun yarn 10 is gradually unwound from the yarn accumulating roller 21.
  • the tension applied to the spun yarn 10 decreases, and the yarn accumulated amount on the yarn accumulating roller 21 gradually increases. Since the rotation speed of the yarn accumulating roller 21 (spinning speed) is normally constant, the tension applied to the spun yarn 10 hooked on the yarn hooking member 22 is changed mostly by the winding speed of the winding device 13.
  • the rotation speed of the winding drum 72 is set such that the winding speed is slightly greater than the yarn feeding speed of the yarn accumulating roller 21 (i.e., greater than the spinning speed of the spinning device 9). Accordingly, the spun yarn 10 wound around the yarn accumulating roller 21 is gradually unwound, and the yarn accumulated amount is reduced.
  • the unit controller of the spinning unit 2 controls the cradle arm 71 to swing towards the left in Fig. 2 by driving a not-illustrated lift cylinder, and the package 45 is moved away from the winding drum 72. Accordingly, the package 45 loses a driving force, and although inertial rotation continues, the winding speed thereof gradually decreases. As a result, the yarn accumulated amount of the yarn accumulating roller 21 gradually increases.
  • the yarn accumulated amount sensor 27 carries out a detection as to whether or not the accumulated amount of the spun yarn 10 exceeds a prescribed value.
  • the unit controller controls the cradle arm 71 to swing towards the right in Fig. 2 , and the package 45 is made into contact with the winding drum 72. As a result, the winding speed is restored, and the spun yarn 10 is unwound from the yarn accumulating roller 21.
  • the winding speed of the winding device 13 can be adjusted.
  • the state in which at least the minimal accumulated amount of the spun yarn 10 is accumulated around the yarn accumulating roller 21 can always be maintained.
  • a vertical axis represents the yarn feeding tension from the spinning device 9 and the yarn accumulated amount on the yarn accumulating roller 21, which are respectively referred to as the "yarn tension” and the “yarn accumulated amount” in the drawing.
  • a horizontal axis represents time.
  • the solid line of the graph of Fig. 10 represents the yarn accumulated amount on the yarn accumulating roller 21 (yarn accumulated amount), and the dashed-line represents the yarn feeding tension (yarn tension) from the spinning device 9.
  • the yarn clearer 52 When the yarn clearer 52 detects a yarn defect during the winding operation of the spun yarn 10, the yarn clearer 52 transmits a yarn defect detection signal to the unit controller. When such a yarn defect detection signal is received, the unit controller immediately cuts the spun yarn 10 by a cutter 57, and stops the draft device 7 and the spinning device 9 or the like. At this time, the yarn at the downstream side of such a cutting position is once wound into the package 45 by the winding device 13. Thus, the spun yarn 10 on the yarn accumulating roller 21 is also wound into the package 45, and the yarn accumulating roller 21 resultantly has no yarn thereon. A yarn portion including the yarn defect is also once wound into the package 45.
  • the unit controller switches into a mode in which the yarn clearer 52 temporarily stops the monitoring of the yarn defect.
  • the unit controller transmits a control signal to the yarn splicing cart 3, and controls the yarn splicing cart 3 to travel to the front of the spinning unit 2 and to start a yarn splicing operation.
  • the unit controller controls to swing the suction mouth 46 to the vicinity of the surface of the package 45 (refer to Fig. 5 ), generate suction airflow, and rotate the package 45 reversely by the winding device 13. Accordingly, the yarn end (lower yarn) is pulled out from an outer peripheral surface of the package 45, and sucked and caught by the suction mouth 46. At this time, the yarn including the yarn defect is pulled out from the package 45 and sucked by the suction mouth 46, which thereby can remove the yarn including the yarn defect from the package 45.
  • the unit controller While reversely rotating the package 45, the unit controller controls the suction mouth 46 with the lower yarn sucked therein to swing upward so as to guide the lower yarn to the splicer 43 (refer to Fig. 6 ).
  • the unit controller controls to stop the rotation of the package 45.
  • the unit controller operates the suction pipe 44 to swing to the vicinity of the downstream of the spinning device 9 (refer to Fig. 5 ).
  • the unit controller re-drives the spinning device 9 or the like to resume a spinning operation, and controls the suction pipe 44 to generate suction airflow and to catch the yarn end (upper yarn) of the spinning device 9 (yarn catching step).
  • the yarn tension and the yarn accumulated amount at this time are represented at time "A" in the graph of Fig. 10 .
  • the yarn is being merely sucked by a suction force of the suction pipe 44. Therefore, the yarn tension is low, and the yarn accumulated amount is zero.
  • the unit controller controls the suction pipe 44 to swing downward so as to pull out the spun yarn 10 from the spinning device 9 and guide the spun yarn 10 to the splicer 43.
  • the unit controller drives the pneumatic cylinder 49 towards the advanced position as illustrated in Fig. 6 so as to move the yarn removing lever 28 to the lifted position. Accordingly, without the spun yarn 10 being engaged with the rotating flyer 38, the yarn end can be guided to the splicer 43.
  • the yarn removing lever 28 is moved upward for the following reasons. That is, the suction force of the suction pipe 44 is not great enough to surpass the resistance torque of the yarn hooking member 22. Therefore, the spun yarn 10 cannot be unwound from the yarn accumulating roller 21 via the yarn hooking member 22 by the suction force of the suction pipe 44. Therefore, if the operation of winding the yarn around the yarn accumulating roller 21 is started before the yarn end is guided to the splicer 43, the suction pipe 44 cannot pull the upper yarn any further. As a result, the upper yarn cannot be guided to the splicer 43, causing a failure of the yarn splicing operation. Accordingly, by placing the upstream guide 23 upward until the suction pipe 44 completes the guiding of the upper yarn to the splicer 43, the start of the winding of the spun yarn 10 around the yarn accumulating roller 21 is prevented.
  • the timing of such swinging movement may be flexible.
  • the yarn removing lever 28 is controlled to immediately move downward. Accordingly, the spun yarn 10 extending between the spinning device 9 and the suction pipe 44 becomes engaged with the flyer 38, and the operation of winding the spun yarn 10 around the yarn accumulating roller 21 is started (as indicated in Fig. 7 , yarn hooking step (yarn guiding step)). That is, during the yarn splicing operation, although the winding by the winding device 13 is stopped, the spun yarn 10 is continuously fed from the spinning device 9. As a result, the yarn slackens if the spun yarn 10 is kept being fed. Therefore, by winding the spun yarn 10 around the yarn accumulating roller 21, the slackening of the spun yarn 10 can be prevented.
  • the yarn accumulating device 12 serves as a yarn slack eliminating device during the yarn splicing operation.
  • the time “B” of the graph of Fig. 10 indicates the state in which the yarn removing lever 28 is moved downward (to the lowered position).
  • the yarn accumulated amount on the yarn accumulating roller 21 increases, and accompanying such increase, the yarn feeding tension of the spun yarn 10 from the spinning device 9 also increases (accumulated amount increasing step).
  • the spun yarn 10 fed from the spinning device 9 may be unstable in terms of yarn quality.
  • the spinning machine 1 in order to prevent the unstable yarn portion from being mixed into the package 45, the spinning machine 1 according to the present embodiment has the following structure.
  • the unit controller monitors the yarn accumulated amount on the yarn accumulating roller 21 by the yarn accumulated amount sensor 27 and determines whether or not the yarn accumulated amount has reached the minimal accumulated amount.
  • the yarn accumulated amount is less than the minimal accumulated amount, the spun yarn 10 is wound around the yarn accumulating roller 21 by keeping the yarn removing lever 28 at the lowered position.
  • the yarn accumulated amount sensor 27 detects that the yarn accumulated amount has reached the minimal accumulated amount (time "C" of Fig.
  • the unit controller moves the yarn removing lever 28 to the lifted position by the pneumatic cylinder 49 and removes the spun yarn 10 from the flyer 38 ( Fig. 9 ).
  • the feeding tension of the spun yarn 10 from the spinning device 9 becomes stable and substantially constant.
  • the spun yarn 10 When the spun yarn 10 is removed from the flyer 38 while the yarn accumulating roller 21 is rotating, the resistance that prevents the spun yarn 10 from being unwound from the tip end of the yarn accumulating roller 21 becomes absent, and as a result, the spun yarn 10 can be unwound even by a weak suction force of the suction pipe 44. Accordingly, the spun yarn 10 on the yarn accumulating roller 21 is unwound and sucked by the suction pipe 44 in the state illustrated in Fig. 9 . Thus, the unstable yarn on the yarn accumulating roller 21 can be disposed by the suction pipe 44 (yarn disposing step).
  • the spun yarn 10 slackens at the tip end of the yarn accumulating roller 21 by the amount for which the yarn accumulating roller 21 has been rotated, and the slackened amount is sucked by the suction pipe 44. Meanwhile, the spun yarn 10 is newly wound at the base end of the yarn accumulating roller 21 by the rotation of the yarn accumulating roller 21. That is, since the spun yarn 10 is newly wound by the amount that has been sucked by the suction pipe 44, as illustrated in the portion between the time "C" and the time "D” of Fig. 10 , the yarn accumulated amount on the yarn accumulating roller 21 can be maintained substantially constant.
  • the spun yarn 10 is fed from the spinning device 9. Therefore, the quality of the spun yarn 10 that is newly wound around the base end of the yarn accumulating roller 21 is stable. Since the unstable spun yarn 10 is unwound from the tip end while the stable spun yarn 10 is wound from the base end, the spun yarn 10 on the yarn accumulating roller 21 is sequentially replaced with the spun yarn 10 having the stable quality.
  • the unit controller controls the splicer 43 to perform the yarn splicing operation (at the time "D" of Fig. 10 ).
  • the portions having the unstable quality do not remain in the spun yarn 10 after the completion of the yarn splicing operation.
  • the spun yarn 10 is unwound by removing the spun yarn 10 from the flyer 38, however, if the suction force of the suction pipe 44 is great enough to surpass the resistance torque of the yarn hooking member 22, the spun yarn 10 can be unwound from the yarn accumulating roller 21 without removing the spun yarn 10 from the flyer 38. In such a case, however, by always generating the suction force surpassing the resistance torque of the yarn hooking member 22, energy is lost greatly.
  • the spun yarn 10 on the yarn accumulating roller 21 may be disposed.
  • the yarn removing lever 28 and the pneumatic cylinder 49 or the like may be omitted.
  • the splicer 43 clamps the yarn ends, and therefore, the suction pipe 44 does not perform the suction operation. Accordingly, if the yarn removing lever 28 is kept upward, the spun yarn 10 unwound from the tip end of the yarn accumulating roller 21 may slacken. In order to prevent such slackening, the yarn removing lever 28 is lowered while the splicer 43 operates (at the time "D" of Fig. 10 ). Accordingly, since the spun yarn 10 engages with the flyer 38, the spun yarn 10 is not unwound from the tip end of the yarn accumulating roller 21, which thereby gradually increases the yarn accumulated amount on the yarn accumulating roller 21 as illustrated in Fig. 10 .
  • the unit controller resumes the winding of the spun yarn 10 by the winding device 13.
  • the point of time when the yarn splicing operation is completed corresponds to the time "E" of Fig. 10 .
  • tension is applied to the spun yarn 10 by the winding device 13, and thus, the spun yarn 10 is unwound from the yarn accumulating roller 21, gradually decreasing the accumulated amount.
  • the unit controller performs the above-described feedback control of the yarn accumulated amount based on the detection result of the yarn accumulating roller 21. For example, when the yarn accumulated amount on the yarn accumulating roller 21 falls below the minimal accumulated amount (at the time "F" of Fig. 10 ), the package 45 is moved away from the winding drum 72 by driving the not-illustrated lift cylinder so as to restore the yarn accumulated amount. When the yarn accumulated amount becomes equal to or exceeds the prescribed value (at the time "G" of Fig. 10 ), the not-illustrated lift cylinder is driven to move the package 45 to make contact with the winding drum 72 and to decrease the yarn accumulated amount.
  • the unit controller switches into a mode in which the yarn clearer 52 monitors the yarn defect. That is, as illustrated in Fig. 10 , since the yarn tension becomes stable on or after the time "C", the yarn clearer 52 can accurately detect the yarn defect. Since the spun yarn 10 that passes through the yarn clearer 52 from the time "A” to the time "C” of Fig. 10 (i.e. the yarn having the unstable quality) is sucked and disposed by the suction pipe 44, it is not necessary to monitor the yarn defect.
  • the spun yarn 10 that passes through the yarn clearer 52 after the time "C” is accumulated on the yarn accumulating roller 21 during the yarn splicing operation and eventually wound into the package 45, it is preferable to monitor the yarn defect of such spun yarn 10. For the above-described reasons, when the accumulated amount of the spun yarn 10 on the yarn accumulating roller 21 exceeds the minimal accumulated amount (after the time "C"), the monitoring of the yarn defect is resumed.
  • the yarn defect of the unstable yarn is also monitored. Since the yarn having the unstable yarn quality has been fed from the spinning device 9 by low yarn tension, the yarn tension of the spun yarn 10 when passing through the yarn clearer 52 is also low. As a result, the visual thickness of the yarn that is being monitored by the yarn clearer 52 becomes thick, and the detection operation of the yarn defect frequently occurs. In order to prevent such frequent detections, a condition setting for the yarn defect detection needs to be changed from that of a normal operation. On this point, in the present embodiment, since the spun yarn 10 having the unstable quality can be disposed, it becomes unnecessary to monitor the yarn defect of the unstable yarn. Accordingly, a control operation that particularly moderates the yarn defect detection condition for the unstable yarn can be omitted, which thereby can simplify the control operation.
  • the spun yarn 10 on the yarn accumulating roller 21 can be disposed during the yarn splicing operation because the yarn removing lever 28 is provided as a yarn removing member at the downstream side of the yarn hooking member 22.
  • the upstream guide 23 can be advanced and receded, and by moving the upstream guide 23 to the advanced position, the spun yarn 10 is controlled to be disengaged from the flyer 38.
  • the spun yarn 10 when no spun yarn is accumulated on the yarn accumulating roller 21, the spun yarn 10 can be controlled to be or not to be hooked on the yarn hooking member 22, however, once the spun yarn 10 starts to be wound around the yarn accumulating roller 21, the spun yarn 10 cannot be removed from the flyer 38. Accordingly, in the structure having the yarn removing member at the upstream side of the yarn hooking member 22, the unstable yarn wound around the yarn accumulating roller 21 cannot be sucked and disposed by the suction of the suction pipe 44 during the yarn splicing operation. Therefore, in the present embodiment, by providing the yarn removing lever 28 at the downstream side of the yarn hooking member 22, the unstable yarn on the yarn accumulating roller 21 can be disposed.
  • the yarn processing method of the spinning machine 1 includes the yarn catching step, the yarn hooking step, the accumulated amount increasing step, and the yarn disposing step.
  • the yarn catching step when the spun yarn 10 fed from the spinning device 9 starts to be wound around the yarn accumulating roller 21, the spun yarn 10 is sucked and caught by the suction pipe 44.
  • the yarn hooking step the spun yarn 10 extending from the spinning device 9 to the suction pipe 44 is engaged with the yarn hooking member 22 that is integrally rotating with the yarn accumulating roller 21, and thus the spun yarn 10 is guided to the outer peripheral surface of the yarn accumulating roller 21.
  • the accumulated amount increasing step while the spun yarn 10 is fed from the spinning device 9 by winding the spun yarn 10 around the outer peripheral surface of the yarn accumulating roller 21, the accumulated amount of the spun yarn 10 accumulated on the yarn accumulating roller 21 increases.
  • the yarn disposing step after the accumulated amount exceeds the minimal accumulated amount, while maintaining the accumulated amount to be at least the minimal accumulated amount, the spun yarn 10 accumulated on the yarn accumulating roller 21 is disposed. Then, after the yarn disposing step, the process proceeds to the yarn splicing operation.
  • the feeding tension is stabilized, and the spun yarn 10 can be stably fed from the spinning device 9.
  • the yarn amount on the yarn accumulating roller 21 is insufficient, the spun yarn 10 cannot be stably fed from the spinning device 9, causing the yarn quality to be unstable, however, in the yarn processing method according to the present embodiment, such occurrences of unstable yarn can be appropriately handled. That is, in the present embodiment, after the portions having the unstable quality of the spun yarn 10 are once wound around the yarn accumulating roller 21 so as to obtain at least the minimal accumulated amount, while winding the spun yarn 10 having the stable quality, the unstable portions can be disposed. Thus, when proceeding to the yarn splicing operation, only the stable spun yarn 10 is accumulated on the yarn accumulating roller 21.
  • the spun yarn 10 accumulated on the yarn accumulating roller 21 can be sucked and disposed by the suction pipe 44.
  • the spun yarn 10 can be sucked and disposed by the suction pipe 44 by a simple operation of removing the yarn from the yarn hooking member 22.
  • the yarn hooking member 22 when at least the minimal accumulated amount of the spun yarn 10 engaged with the yarn hooking member 22 is wound around, and thus the tension is stabilized, the yarn hooking member 22 unwinds the spun yarn 10 from the yarn accumulating roller 21.
  • the yarn disposing step by increasing the suction force of the suction pipe 44, the tension of the spun yarn 10 located between the suction pipe 44 and the yarn hooking member 22 is increased, and the spun yarn 10 accumulated on the yarn accumulating roller 21 is sucked and disposed.
  • the spun yarn 10 can be sucked and disposed by the suction pipe 44 by only increasing the suction force of the suction pipe 44, a special movable member for disposing the spun yarn 10 does not need to be provided, which thereby can reduce a cost.
  • the spinning machine 1 includes the spinning device 9, the winding device 13, the yarn accumulating roller 21, the yarn hooking member 22, and the yarn removing lever 28 as a yarn disposing section.
  • the spinning device 9 forms the spun yarn 10 by applying twists to the fiber bundle 8.
  • the winding device 13 forms the package 45 by winding the spun yarn 10 fed from the spinning device 9.
  • the yarn accumulating roller 21 rotates with the spun yarn 10 wound around the outer peripheral surface thereof so as to feed the spun yarn 10 from the spinning device 9 while applying tension to the spun yarn 10.
  • the yarn hooking member 22 can be engaged with the spun yarn 10, and by rotating integrally with the yarn accumulating roller 21 while being engaged with the spun yarn 10, the yarn hooking member 22 can prevent the spun yarn 10 from being unwound from the outer peripheral surface of the yarn accumulating roller 21.
  • the yarn removing lever 28 is arranged downstream of the yarn hooking member 22 in the yarn transporting direction, and can be moved between the lowered position where the yarn removing lever 28 does not make contact with the spun yarn 10 and the lifted position where the yarn removing lever 28 makes contact with the spun yarn 10. When the yarn removing lever 28 is located at the lifted position, the yarn removing lever 28 removes the spun yarn 10 from the yarn hooking member 22.
  • the feeding tension is stabilized, and the spun yarn 10 can be stably fed from the spinning device 9.
  • the spun yarn 10 cannot be stably fed from the spinning device 9, causing unstable yarn quality, however, in the present embodiment, such occurrences of the unstable yarn can be handled. That is, in the present embodiment, after the portions having unstable quality of the spun yarn 10 are once wound around the yarn accumulating roller 21, such unstable portions can be disposed while winding the spun yarn 10 having the stable quality. Accordingly, when proceeding to the yarn splicing operation, only the stable yarn is accumulated on the yarn accumulating roller 21.
  • the package 45 of good quality can be formed. Moreover, with the simple structure of moving the yarn removing lever 28, the spun yarn 10 can be removed from the yarn hooking member 22, and the unstable portions of the spun yarn 10 can be unwound from the yarn accumulating roller 21.
  • the spinning machine 1 includes the pneumatic cylinder 49 that drives the yarn removing lever 28 via the uplifting arm 47.
  • the pneumatic cylinder 49 moves the yarn removing lever 28 to the lowered position.
  • the pneumatic cylinder 49 moves the yarn removing lever 28 to the lifted position.
  • the spun yarn 10 on the yarn accumulating roller 21 can be unwound.
  • the spinning machine 1 includes the yarn clearer 52 that monitors a presence or an absence of the yarn defect of the spun yarn 10.
  • the yarn clearer 52 temporarily stops the monitoring of the yarn defect.
  • the yarn clearer 52 resumes the monitoring of the yarn defect.
  • the monitoring of the yarn defect is started under the state in which the sufficient amount of the spun yarn 10 has not been wound around the yarn accumulating roller 21, due to the unstable yarn tension, an accurate detection result cannot be expected.
  • the monitoring of the yarn defect is temporarily stopped, and after the spun yarn 10 is sufficiently wound around the yarn accumulating roller 21 and the spun yarn 10 can be stably fed from the spinning device 9, the monitoring of the yarn defect can be resumed. Accordingly, after the unstable yarn portion is unwound from the yarn accumulating roller 21, only the spun yarn 10 in which the presence or the absence of the yarn defect has been properly detected is wound on the yarn accumulating roller 21. Further, since the monitoring of the yarn defect is started only after the yarn tension becomes stable, it is not necessary to change the setting for the yarn defect detection for when the yarn tension is unstable, which thereby can facilitate the controlling operation.
  • the pneumatic cylinder 49 moves back the yarn removing lever 28 to the lowered position.
  • the unwinding of the spun yarn 10 is stopped, and only the spun yarn 10 stably fed from the spinning device 9 can be accumulated on the yarn accumulating roller 21.
  • the spinning machine 1 includes the splicer 43 and the suction pipe 44 that can catch the spun yarn 10 from the spinning device 9 by suction airflow and guide the caught spun yarn 10 to the splicer 43.
  • the pneumatic cylinder 49 moves the yarn removing lever 28 to the lifted position.
  • the spun yarn 10 can be unwound from the yarn accumulating roller 21.
  • the unstable portions of the spun yarn 10 can be disposed. Accordingly, after the unstable portions are unwound and disposed, only the spun yarn 10 stably fed from the spinning device 9 is wound around the yarn accumulating roller 21. By performing the yarn splicing operation in this state, the unstable spun yarn 10 can be prevented from being mixed into the package 45 from the yarn accumulating roller 21.
  • the spinning machine 1 includes the plurality of spinning units 2 and the yarn splicing cart 3.
  • Each of the spinning units 2 includes the spinning device 9, the winding device 13, the yarn accumulating roller 21, the yarn hooking member 22, and the yarn removing lever 28.
  • the yarn splicing cart 3 can travel among the plurality of spinning units 2, and includes the pneumatic cylinder 49. Accordingly, it is not necessary to provide the pneumatic cylinder 49 to each of the spinning units 2, and thus, the cost can be reduced.
  • the yarn processing method of the present invention is not limited to the yarn splicing operation, and may be used when the spun yarn 10 starts to be wound around the yarn accumulating roller 21.
  • the unstable yarn can be disposed from the yarn accumulating roller 21 by the yarn processing method of the present invention.
  • the yarn removing lever 28 as the yarn removing member swings around the shaft.
  • the spun yarn may be removed from the yarn hooking member 22 by parallely moving the yarn removing lever 28 back and forth.
  • the downstream guide 26 may be advanced and receded, and the spun yarn 10 may be removed from the yarn hooking member 22 by advancing the downstream guide 26.
  • the yarn splicing cart 3 includes the uplifting arm 47 and the pneumatic cylinder 49 as a mechanism for driving the yarn removing lever 28.
  • each of the spinning units 2 may include a structure for driving the yarn removing lever 28.
  • the yarn removing lever 28 may be moved by an appropriate structure such as, for example, a rack and pinion mechanism, a cam mechanism or the like.
  • each of the spinning units 2 may include a structure for the yarn splicing operation.
  • the method of applying the torque between the yarn hooking member 22 and the yarn accumulating roller 21 is not limited to the above-described magnetic mechanism, and, for example, a frictional force or an electromagnetic mechanism may be used.
  • the yarn hooking member 22 and the yarn accumulating roller 21 may not be able to relatively rotate, and, for example, as the slack eliminating device disclosed in Japanese Unexamined Patent Application Publication No. 2004-124333 , a cutout portion formed on the slack eliminating roller may serve as the yarn hooking section.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (11)

  1. Procédé de traitement de fils comprenant :
    une étape de guidage de fil pour guider du fil filé acheminé d'un dispositif de filage (9) à la surface périphérique externe d'un rouleau accumulateur de fil (21), et
    une étape d'augmentation de la quantité accumulée pour acheminer le fil filé en enroulant le fil filé provenant du dispositif de filage (9) autour de la surface périphérique externe du rouleau accumulateur de fil (21) et en augmentant la quantité accumulée du fil filé accumulé sur le rouleau accumulateur de fil (21),
    caractérisé en ce que :
    l'étape d'augmentation de la quantité accumulée de fil comprend la fonction d'application d'une tension prédéterminée au fil filé et l'acheminement du fil à partir du dispositif de filage (9) et comprenant en outre :
    une étape de mise au rebut du fil pour mettre au rebut le fil filé accumulé sur le rouleau accumulateur de fil (21) après l'étape d'augmentation de la quantité de fil accumulée et avant de procéder à une opération ultérieure.
  2. Procédé de traitement de fils selon la revendication 1, comprenant :
    une étape de détection de quantité accumulée pour détecter la quantité accumulée du fil filé sur le rouleau accumulateur de fil (21),
    dans lequel, à l'étape de mise au rebut de fil, après une détection réalisée dans l'étape de détection de quantité accumulée montrant que la quantité accumulée a atteint une quantité prescrite, le fil filé accumulé sur le rouleau accumulateur de fil (21) est mis au rebut tout en maintenant la quantité accumulée pour qu'elle soit au moins la quantité prescrite.
  3. Procédé de traitement de fils selon la revendication 1 ou la revendication 2, dans lequel, à l'étape de guidage de fil, le fil filé est guidé sur la surface périphérique externe du rouleau accumulateur de fil (21) par un élément de capture de fil (44) qui capture le fil filé par écoulement d'air d'aspiration.
  4. Procédé de traitement de fils selon la revendication 3, dans lequel, à l'étape de mise eu rebut de fil, l'élément de capture de fil (44) met au rebut le fil filé.
  5. Procédé de traitement de fils selon l'une quelconque des revendications 1 à 4, comprenant une étape d'épissage de fils pour réaliser une opération d'épissage de fils, après l'étape de mise au rebut de fil, sur le fil filé déroulé du rouleau accumulateur de fil (21) et sur le fil filé enroulé en paquet.
  6. Procédé de traitement de fils selon la revendication 5, comprenant une étape d'enroulement pour enrouler le fil filé en paquet après l'étape d'épissage de fils.
  7. Machine de filage comprenant :
    un dispositif de filage (9) qui forme un fil filé en appliquant une torsion à un faisceau de fibres ;
    un dispositif d'enroulement (13) qui forme un paquet en enroulant le fil filé acheminé depuis le dispositif de filage (9) ;
    un rouleau accumulateur de fil (21) qui enroule le fil filé autour de sa surface périphérique externe et tourne avec le fil filé enroulé pour acheminer le fil filé depuis le dispositif de filage (9) tout en appliquant une tension au fil filé ; caractérisée par :
    une section de mise au rebut de fil accumulé (44) pour mettre au rebut le fil filé enroulé autour du rouleau accumulateur de fil (21).
  8. Machine de filage selon la revendication 7, comprenant une section de détection de quantité accumulée (27) qui détecte une quantité accumulée du fil filé enroulé autour du rouleau accumulateur de fil (21),
    dans laquelle, une fois que la section de détection de quantité accumulée (27) détecte qu'au moins une quantité prescrite du fil filé a été accumulée, la section de mise au rebut de fil accumulé (44) met au rebut le fil filé accumulé sur le rouleau accumulateur de fil (21) tout en maintenant la quantité accumulée pour quelle soit au moins la quantité prescrite.
  9. Machine de filage selon la revendication 7 ou la revendication 8, dans laquelle la section de mise au rebut de fil accumulé (44) capture le fil filé par écoulement d'air d'aspiration et guide le fil filé capturé au rouleau accumulateur de fil (21).
  10. Machine de filage selon la revendication 9, comprenant :
    un dispositif d'épissage de fils (43) qui épisse le fil filé déroulé du rouleau accumulateur de fil (21) et le fil filé du paquet enroulé par le dispositif d'enroulement (13) ; et
    une section de commande qui commande au dispositif d'épissage de fils d'effectuer une opération d'épissage de fils une fois que la section de mise au rebut de fil accumulé (44) met au rebut le fil filé.
  11. Machine de filage selon l'une quelconque des revendications 7 à 10, comprenant un dispositif de détection de défaut de fil (52) qui surveille la présence ou l'absence d'un défaut dans le fil filé,
    dans laquelle, lorsque le fil filé enroulé autour du rouleau accumulateur de fil (21) est en quantité inférieure à la quantité prescrite, le dispositif de détection de défaut de fil (52) arrête momentanément la surveillance du défaut de fil, et,
    une fois qu'au moins la quantité prescrite du fil filé est enroulée autour du rouleau accumulateur de fil (21), le dispositif de détection de défaut de fil (52) relance la surveillance du défaut de fil.
EP09178604.6A 2009-02-04 2009-12-10 Procédé de traitement de fils et fileuse Not-in-force EP2216432B2 (fr)

Applications Claiming Priority (1)

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JP2009024200A JP2010180007A (ja) 2009-02-04 2009-02-04 糸処理方法及び紡績機

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EP2216432A1 EP2216432A1 (fr) 2010-08-11
EP2216432B1 true EP2216432B1 (fr) 2015-05-06
EP2216432B2 EP2216432B2 (fr) 2018-10-10

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JP2013067466A (ja) * 2011-09-21 2013-04-18 Murata Machinery Ltd 糸処理装置、紡績ユニット及び紡績機
JP2013253358A (ja) * 2012-06-08 2013-12-19 Murata Mach Ltd 紡績機
JP2014125714A (ja) * 2012-12-27 2014-07-07 Murata Mach Ltd 紡績機
JP2014125349A (ja) * 2012-12-27 2014-07-07 Murata Mach Ltd 糸貯留装置及び紡績ユニット
CN103523591B (zh) * 2013-10-18 2016-04-06 陕西华燕航空仪表有限公司 大锥度筒纱成型装置
JP2015161032A (ja) * 2014-02-25 2015-09-07 村田機械株式会社 糸貯留装置、これを備えた糸巻取ユニット、及びこれを備えた糸巻取機
JP2016016957A (ja) 2014-07-10 2016-02-01 村田機械株式会社 糸巻取機及び糸巻取方法
JP2016037685A (ja) * 2014-08-11 2016-03-22 村田機械株式会社 紡績機
IT201700053150A1 (it) * 2017-05-17 2018-11-17 Lgl Electronics Spa Sensore di rottura del filato per apparati tessili
IT201900001195A1 (it) * 2019-01-28 2020-07-28 Savio Macch Tessili Spa Apparato di filatura, in particolare ad aria, con regolazione in continuo di un sistema di accumulo filo e relativo metodo di regolazione in continuo di un sistema di accumulo filo in un apparato di filatura
CZ2019389A3 (cs) * 2019-06-19 2020-12-30 Rieter Cz S.R.O. Zařízení pro nasávání a dopravu příze pro uspořádání na obslužném robotu textilního stroje pro výrobu příze, obslužný robot pro obsluhu pracovního místa textilního stroje a textilní stroj
JP7390207B2 (ja) * 2020-02-20 2023-12-01 Ｔｍｔマシナリー株式会社 繊維機械及び糸張力把握方法

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US4553709A (en) 1982-10-16 1985-11-19 Schubert & Salzer Yarn accumulator
EP1598295A1 (fr) 2004-05-17 2005-11-23 RICAMBI TESSILI RI.TE - SpA Dispostif et procédé pour former une réserve de fil dans des machines de textiles comme des métiers à filer, des machines à texturer, des machines de mercerisage ou semblable
EP1717182A2 (fr) 2005-04-28 2006-11-02 Murata Kikai Kabushiki Kaisha Dispositif d'élimination des relâchements de fil dans une machine textile
EP2028149A2 (fr) 2007-08-21 2009-02-25 Murata Machinery, Ltd. Dispositif de contrôle de tension de bobinage
EP2169096A1 (fr) 2008-09-29 2010-03-31 Murata Machinery Ltd. Fileuse

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US4553709A (en) 1982-10-16 1985-11-19 Schubert & Salzer Yarn accumulator
DE3415447A1 (de) 1983-06-24 1985-01-10 Výzkumný ústav bavlnářský, Ustí nad Orlicí Vorrichtung zum abziehen und aufwickeln von garn
EP1598295A1 (fr) 2004-05-17 2005-11-23 RICAMBI TESSILI RI.TE - SpA Dispostif et procédé pour former une réserve de fil dans des machines de textiles comme des métiers à filer, des machines à texturer, des machines de mercerisage ou semblable
EP1717182A2 (fr) 2005-04-28 2006-11-02 Murata Kikai Kabushiki Kaisha Dispositif d'élimination des relâchements de fil dans une machine textile
EP2028149A2 (fr) 2007-08-21 2009-02-25 Murata Machinery, Ltd. Dispositif de contrôle de tension de bobinage
EP2169096A1 (fr) 2008-09-29 2010-03-31 Murata Machinery Ltd. Fileuse

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CN101792076B (zh) 2013-03-13
EP2216432A1 (fr) 2010-08-11
CN101792076A (zh) 2010-08-04
EP2216432B2 (fr) 2018-10-10

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