EP2284300B1 - Fileuse et procédé de retrait de fil pour retirer le fil restant sur le rouleau d'accumulation de fils - Google Patents

Fileuse et procédé de retrait de fil pour retirer le fil restant sur le rouleau d'accumulation de fils Download PDF

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Publication number
EP2284300B1
EP2284300B1 EP10161969A EP10161969A EP2284300B1 EP 2284300 B1 EP2284300 B1 EP 2284300B1 EP 10161969 A EP10161969 A EP 10161969A EP 10161969 A EP10161969 A EP 10161969A EP 2284300 B1 EP2284300 B1 EP 2284300B1
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EP
European Patent Office
Prior art keywords
yarn
accumulating roller
spun
spun yarn
spinning
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
EP10161969A
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German (de)
English (en)
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EP2284300A1 (fr
Inventor
Masaki Oka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
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Murata Machinery Ltd
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Publication date
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Publication of EP2284300A1 publication Critical patent/EP2284300A1/fr
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Publication of EP2284300B1 publication Critical patent/EP2284300B1/fr
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/86—Arrangements for taking-up waste material before or after winding or depositing
    • B65H54/88—Arrangements for taking-up waste material before or after winding or depositing by means of pneumatic arrangements, e.g. suction guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a spinning machine including a yarn accumulating roller.
  • Japanese Unexamined Patent Application Publication No. H11-268871 and EP-A-2,075,358 , EP-A-2,075,359 disclose a spinning machine, which includes a spinning device, a clearing device (a yarn defect detecting device), and a local control device (a control section).
  • the clearing device obtains data relating to thickness and length of spun yarn fed from the spinning device. Based on the data, the local control device determines whether or not yarn (spun yarn) at a position, where such data has been obtained, corresponds to a yarn defect which should be cut off. If the local control device determines that the yarn includes a yarn defect which should be cut off, the spun yarn is cut off in an appropriate manner.
  • the spinning machine also includes a structure for displaying whether or not thickness and length of the yarn in a yarn defect part which has been actually cut off correspond accurately to a clearing limit.
  • Japanese Unexamined Patent Application Publication No. 2004-124333 discloses a spinning machine which includes a yarn slack eliminating device (a yarn accumulating device) and a yarn suction device.
  • the yarn slack eliminating device includes a yarn slack eliminating roller (a yarn accumulating roller) which can wound yarn around an outer peripheral surface thereof.
  • the yarn slack eliminating roller winds yarn, which is fed continuously from the spinning device, around the outer peripheral surface thereof, and temporarily accumulates the yarn to prevent yarn slackening, which generates during a yarn splicing operation.
  • the yarn suction device is arranged between the spinning device and the yarn slack eliminating roller, and generates suction airflow at a yarn suction opening.
  • the yarn suction device has a function for sucking and removing fiber waste adhered on a cut-off yarn end, or the like.
  • a clearing device and a yarn cutting device are arranged upstream of the yarn slack eliminating device (closer to a spinning device than the yarn slack eliminating device), such as the structure of Japanese Unexamined Patent Application Publication No. 2004-124333 .
  • a yarn cutting process is carried out by an appropriate method for removing such a yarn defect.
  • Yarn of a downstream portion of the cut-off spun yarn includes the yarn defect, and the yarn including such a yarn defect is wound around a package via the yarn slack eliminating device.
  • the yarn end of the spun yarn wound around the package and a yarn end at upstream of the yarn slack eliminating device are caught by an appropriate method, and are guided to a yarn splicing device.
  • the yarn defect portion is removed and a yarn splicing operation is carried out by the yarn splicing device.
  • a spinning operation is restarted.
  • the downstream portion of the cut-off spun yarn may be torn off at such a yarn defect portion when passing through the yarn slack eliminating roller or the like.
  • the yarn located upstream of the torn-off portion cannot be pulled downstream by the winding device, the yarn remains on the yarn slack eliminating roller. Accordingly, a spinning operation can not be restarted as is.
  • a consideration can be made on a method of sucking and removing the yarn by a yarn suction device.
  • a yarn end of the yarn may not be located near a yarn suction opening of the yarn suction device, the yarn had to be removed by hand as a result in many cases. Accordingly, work efficiency was also difficult to be improved effectively by the yarn suction device.
  • the present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a spinning machine which can efficiently remove spun yarn remaining on a yarn accumulating roller due to generation of a yarn defect in which yarn strength is low.
  • the spinning machine includes a spinning device, a yarn defect detecting device, a yarn accumulating roller, a driving motor, a suction opening, a suction device, and a control section.
  • the spinning device produces spun yarn by applying twists to a fiber bundle.
  • the yarn defect detecting device is arranged downstream of the spinning device and detects a yarn defect in the travelling spun yarn.
  • the yarn accumulating roller is arranged downstream of the yarn defect detecting device and accumulates the spun yarn fed from the spinning device by rotating while winding the spun yarn around an outer peripheral surface thereof.
  • the driving motor drives and rotates the yarn accumulating roller.
  • the suction opening is arranged near the outer peripheral surface of the yarn accumulating roller and near an edge of the yarn accumulating roller where the spun yarn is wound around.
  • the suction device can generate suction airflow at the suction opening.
  • the control section controls the spinning device such that when the yarn defect detecting device detects a prescribed yarn defect in which yarn strength is low, a stoppage timing, which is a timing at which feeding of the spun yarn from the spinning device to the yarn accumulating roller is stopped, is delayed compared with when other type of yarn defect is detected, and controls the driving motor such that the yarn accumulating roller is stopped after the stoppage timing.
  • the spun yarn is fed to the yarn accumulating roller for a while even after such a yarn breakage occurs, the spun yarn is wound around to near the edge of the yarn accumulating roller where the spun yarn is wound around.
  • a position of a yarn end made by stopping the feeding of the spun yarn comes close to the suction opening, such a yarn end can be easily sucked by the suction device.
  • the spun yarn remaining on the yarn accumulating roller is not necessary to be removed by hand, and a spinning operation can be performed efficiently.
  • the yarn defect detecting device detects a yarn portion in which yarn thickness is thicker for at least a preset level than thickness of normal yarn as a prescribed yarn defect. Accordingly, larger slub having low yarn strength can be detected, and the above-described control can be performed appropriately.
  • the control section controls the rotation of the driving motor such that after the rotation of the yarn accumulating roller is stopped, the yarn accumulating roller is rotated in a opposite direction from a direction in which the yarn accumulating roller is rotated while winding the spun yarn. Accordingly, the unnecessary spun yarn sucked by the suction device can be removed automatically from the yarn accumulating roller. As a result, it is not necessary to remove the spun yarn remaining on the yarn accumulating roller by hand, and it is possible to perform the spinning operation efficiently.
  • the control section controls the spinning device such that the feeding of the spun yarn is stopped by stopping twists applied by the spinning device. That is, by stopping twists of a fiber bundle applied by the spinning device, yarn strength in the spun yarn becomes lower. In such a case, since the spun yarn cannot endure tension and is cut off like being torn off, fibers in the yarn end becomes untwisted. As a result, such a yarn end is likely to follow suction airflow near the suction opening, and the yarn end can be easily sucked by the suction opening.
  • a yarn removing method for removing the spun yarn remaining on the yarn accumulating roller includes a yarn defect detecting step, a feeding stopping step, a yarn accumulating roller stopping step, a yarn end sucking step, and a yarn removing step.
  • the yarn defect detecting step detects the prescribed yarn defect in which yarn strength is low.
  • the feeding stopping step stops the feeding of the spun yarn after a prescribed period of time elapses from detection of the prescribed yarn defect.
  • the yarn accumulating roller stopping step stops the rotation of the yarn accumulating roller.
  • the yarn end sucking step sucks a yarn end of the spun yarn remaining on the yarn accumulating roller by the suction opening that is arranged near the outer peripheral surface of the yarn accumulating roller and near the edge of the yarn accumulating roller where the spun yarn is wound around.
  • the yarn removing step sucks the yarn end of the spun yarn remaining on the yarn accumulating roller, and removes the spun yarn by rotating the yarn accumulating roller in a direction in which the spun yarn is unwound from the yarn accumulating roller.
  • upstream and downstream refer to an upstream side and a downstream side in a travelling direction of yarn during a spinning operation, respectively.
  • the spinning frame 1 as a spinning machine illustrated in Fig. 1 includes a plurality of units (spinning units 2) arranged next to one another.
  • the spinning frame 1 includes a yarn splicing cart 3, a blower box 80, and a motor box 5.
  • each spinning unit 2 includes a draft device 7, a spinning device 9, a yarn accumulating device 12, a lower-yarn sensor 31, and a winding device 13 as main components, which are arranged in this order from upstream to downstream.
  • the draft device 7 is arranged near an upper end of a frame 6 of the spinning frame 1.
  • a fiber bundle 8, which is fed from the draft device 7, is spun by the spinning device 9.
  • spun yarn 10 fed from the spinning device 9 is fed by the yarn accumulating device 12 and is wound by the winding device 13, which forms a package 45.
  • the draft device 7 is used for producing the fiber bundle 8 by drafting a sliver 15. As illustrated in Fig. 2 , the draft device 7 includes four roller which are a back roller 16, a third roller 17, a middle bottom roller 19 provided with an apron belt roller 18, and a front roller 20. Such rollers are connected to motors (not illustrated in the drawings). The draft device 7 can be driven by driving such motors, and the draft device 7 can be stopped by stopping such motors. Moreover, driving and stopping of such motors are controlled by a unit controller (a control section) 60 as illustrated in Fig. 3 .
  • a unit controller a control section
  • a detailed structure of the spinning device 9 is not illustrated in the drawings; however, the present embodiment adopts a pneumatic type which applies twists to the fiber bundle 8 by whirling airflow.
  • the spun yarn 10 can be produced.
  • the unit controller 60 controls the generation and a stoppage of the whirling airflow.
  • the yarn accumulating device 12 is located downstream of the spinning device 9.
  • the yarn accumulating device 12 has a pulling function, a yarn slack preventing function, and a tension adjusting function.
  • the pulling function is a function in which the yarn accumulating device 12 applies prescribed tension to the spun yarn 10 and pulls the spun yarn 10 from the spinning device 9.
  • the yarn slack preventing function is a function in which the yarn accumulating device 12 accumulates the spun yarn 10 fed from the spinning device 9 and prevents the yarn slackening during a yarn splicing operation performed by the yarn splicing cart 3 or the like.
  • the tension adjusting function is a function in which the yarn accumulating device 12 adjusts tension such that change in tension on the winding device 13 side is prevented from propagating to the spinning device 9 side.
  • the yarn accumulating device 12 includes a yarn accumulating roller 21, a yarn hooking member 22, an upstream guide 23, an electric motor (a driving motor) 25, a downstream guide 26, and an accumulated amount detecting sensor 27.
  • the yarn hooking member 22 is formed capable of being engaged with (hooking) the spun yarn 10. Under a state in which the yarn hooking member 22 is engaged with the spun yarn 10, the yarn hooking member 22 can guide the spun yarn 10 to the outer peripheral surface 21a of the yarn accumulating roller 21 by rotating integrally with the yarn accumulating roller 21.
  • the yarn accumulating roller 21 can accumulate the spun yarn 10 by winding the spun yarn 10 around the outer peripheral surface 21a thereof.
  • the yarn accumulating roller 21 is rotationally driven by the electric motor 25.
  • the yarn accumulating roller 21 is rotated such that the spun yarn 10, which has been guided to the outer peripheral surface 21a of the yarn accumulating roller 21 by the yarn hooking member 22, is wound around the yarn accumulating roller 21 so as to tighten the yarn accumulating roller 21.
  • the spun yarn 10 would around the yarn accumulating roller 21 pulls the spun yarn 10 located upstream of the yarn accumulating device 12. Accordingly, the spun yarn 10 can be continuously pulled out from the spinning device 9.
  • the accumulated amount detecting sensor 27 detects an accumulated amount of the spun yarn 10 accumulated on the yarn accumulating roller 21 in a non-contact manner.
  • the accumulated amount detecting sensor 27 transmits the detected remaining amount of the spun yarn 10 to the unit controller 60.
  • the upstream guide 23 is located slightly upstream of the yarn accumulating roller 21.
  • the upstream guide 23 functions as a guiding member which appropriately guides the yarn to the outer peripheral surface 21a of the yarn accumulating roller 21. Further, the upstream guide 23 functions as a twist preventing member which prevents twists of the spun yarn 10 transmitted from the spinning device 9 from propagating downstream of the upstream guide 23.
  • the downstream guide 26 is located slightly downstream of the yarn accumulating roller 21.
  • the downstream guide 26 restricts an orbit of the spun yarn 10 which is swung by the rotating yarn hooking member 22.
  • the downstream guide 26 is formed as a guiding member which guides the spun yarn 10 while stabilizing a travelling route of the spun yarn located downstream of the downstream guide 26.
  • a suction device 30 is located near the yarn accumulating roller 21.
  • a connection tube 30a is connected to the suction device 30.
  • the connection tube 30a is connected to a blower (not illustrated in the drawings), which is provided in the blower box 80. Accordingly, suction airflow can be generated in the suction device 30.
  • the yarn clearer (the yarn defect detecting device) 52 is located in front of the frame 6 of the spinning frame 1 and at a position between the spinning device 9 and the yarn accumulating device 12.
  • the yarn clearer 52 includes a clearer head 91 and an analyzer 92 (not illustrated in Fig. 2 ) as main components.
  • the yarn clearer 52 monitors thickness of the travelling spun yarn 10 and a foreign substance or the like in the travelling spun yarn 10. When detecting a yarn defect in the spun yarn 10, the yarn clearer 52 transmits a yarn defect detection signal to the unit controller 60.
  • the analyzer 92 includes a Central Processing Unit (CPU) or the like (not illustrated in the drawings). If a detected value input from the clearer head 91 satisfies a prescribed condition, the analyzer 92 determines that the detected value corresponds to a yarn defect and transmits a prescribed yarn defect detection signal to the unit controller 60. For example, when a yarn portion which is 150% thicker than average thickness of the yarn continues for at least 3mm, the analyzer 92 determines such a yarn portion as slub or the like. In particular, in the present embodiment, when the a yarn portion which is equal to or thicker than a prescribed thickness with respect to the average thickness of the yarn (e.g.
  • the analyzer 92 determines such a yarn portion as large slub, and transmits a large slub detection signal as the yarn defect detection signal to the unit controller 60.
  • a cutter 57 is provided near the yarn clearer 52 for cutting the spun yarn 10 when the package 45 is fully wound or the like.
  • the yarn splicing cart 3 includes a splicer (a yarn splicing device) 43, a suction pipe 44, and a suction mouth 46.
  • the yarn splicing cart 3 can travel on a rail 41 fixed to the frame 6. When a yarn breakage or a yarn cut occurs in one spinning unit 2, the yarn splicing cart 3 travels on the rail 41 to such a spinning unit 2, stops in front of such a spinning unit 2, and performs a yarn splicing operation.
  • the suction pipe 44 can swing around a shaft in a vertical direction.
  • the suction pipe 44 sucks and catches a yarn end (an upper yarn) fed from the spinning device 9, and guides the yarn end to the splicer 43.
  • the suction mouth 46 can swing around the shaft in a vertical direction.
  • the suction mouth 46 sucks and catches a yarn end (a lower yarn) from the package 45 supported by the winding device 13, and guides the yarn end to the splicer 43.
  • the upper yarn is spliced with the lower yarn by twisting each yarn end together by whirling airflow.
  • the lower-yarn sensor 31 is located at a position between the yarn accumulating device 12 and the winding device 13, and detects whether or not the spun yarn 10 exists at such a position. A lower yarn detection signal detected by the lower-yarn sensor 31 is transmitted to the unit controller 60.
  • the winding device 13 includes a cradle arm 71 supported around a supporting shaft 70 in a manner that the cradle arm 71 can be swung.
  • the cradle arm 71 can support a bobbin 48 for winding the spun yarn 10 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 rotationally driven while making contact with an outer peripheral surface of the bobbin 48 or an outer peripheral surface of 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 which can be engaged with the spun yarn 10. In such a structure, by driving the winding drum 72 by an electric motor (not illustrated in the drawings) while reciprocating the traverse guide 76 by a driving mechanism (not illustrated in the drawings), the package 45 making contact with the winging drum 72 is rotated, and the spun yarn 10 is wound into the package 45 while being traversed.
  • the yarn accumulating roller 21 is a roller member formed of abrasion-resistant material.
  • the yarn accumulating roller 21 is fixed to a motor shaft 25a of the electric motor 25.
  • a side of the yarn accumulating roller 25 on which the yarn hooking member 22 is provided will be referred to as a leading end, and a side where 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 leading-end taper portion 21d arranged in this order from the base end to the leading end thereof.
  • the cylindrical portion 21c slightly tapers towards the leading end thereof, and also is flatly connected (without difference in level) with the base-end taper portion 21b and the leading-end taper portion 21d.
  • the accumulated amount detecting sensor 27 faces the cylindrical portion 21c.
  • the accumulated amount detecting sensor 27 detects an accumulated amount of the spun yarn 10 wound around the yarn accumulating roller 21, and transmits a yarn accumulated amount detection signal to the unit controller 60.
  • Each of the base-end taper portion 21b and the leading-end taper portion 21d has a slightly tapered shape with a larger diameter at a corresponding end surface 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 leading-end taper portion 21d prevents a sloughing phenomenon in which the wound spun yarn 10 sloughs off all at once when unwinding the spun yarn 10 towards the downstream side.
  • the leading-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 surface side so as to smoothly feed the spun yarn 10.
  • the suction device 30 is located near the yarn accumulating roller 21.
  • the suction device 30 includes a suction pipe 30c formed in a pipe shape. One end of the suction pipe 30c, which is an open end, is provided with a suction opening 30b to generate suction airflow.
  • the suction opening 30b is located near the outer peripheral surface 21a of the yarn accumulating roller 21, and is located so as to be close to a base-end end portion of the yarn accumulating roller 21.
  • the spun yarn 10 wound around the base-end portion of the yarn accumulating roller 21 is subjected to an influence of the suction airflow generated by the suction device 30.
  • the suction pipe 30c is connected with the connection tube 30a. Accordingly, fiber waste and waste yarn sucked from the suction opening 30b are removed via the connection tube 30a, and are finally collected and discarded in a prescribed place.
  • the unit controller 60 can control driving of the yarn accumulating roller 21 or the like.
  • the unit controller 60 rotationally drives the yarn accumulating roller 21 in a prescribed direction at a constant speed.
  • the spun yarn 10 is wound around the yarn accumulating roller 21 at a constant speed, and the spun yarn 10 is pulled from the spinning device 9 at a constant speed by being pulled by the wound spun yarn 10.
  • the unit controller 60 can stop rotation of the yarn accumulating roller 21 and can rotate the yarn accumulating roller 21 in an opposite direction from the above-described direction.
  • rotating the yarn accumulating roller 21 in a rotational direction during the normal winding operation will be simply referred to as forward rotation, and rotating the yarn accumulating roller 21 in an opposite direction from the normal winding operation will be referred to as backward rotation.
  • the yarn hooking member 22 located on a leading 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 leading end of the flyer axis 33.
  • the flyer axis 33 is supported relatively rotatable with respect to the yarn accumulating roller 21.
  • a permanent magnet is mounted on one of the flyer axis 33 and the yarn accumulating roller 21, and a magnetic hysteresis member is mounted on the other thereof.
  • a resistance torque is generated against the rotation of the yarn hooking member 22 relative to the yarn accumulating roller 21 by such magnetic mechanisms.
  • the yarn hooking member 22 rotates accompanying the rotation of the yarn accumulating roller 21 by the resistance torque. Accordingly, the yarn hooking member 22 and the yarn accumulating roller 21 rotate integrally. Meanwhile, when force that surpasses the resistance torque is applied to the yarn hooking member 22, the yarn hooking member 22 can rotate relatively with respect to the yarn accumulating roller 21.
  • the flyer 38 is curved appropriately toward the outer peripheral surface 21a of the yarn accumulating roller 21, and is formed in a shape in which the flyer 38 can be engaged with the spun yarn 10 (hook the spun yarn 10). Under a state in which yarn is not wound around the yarn accumulating roller 21, when the flyer 38 rotates integrally with the yarn accumulating roller 21 in a forward direction, the flyer 38 is engaged with the spun yarn 10. Then, the spun yarn 10 engaged with the rotating flyer 38 is swung around by such a flyer 38, and is guided to and wound around the outer peripheral surface 21a of the yarn accumulating roller 21 which is rotating in a forward direction.
  • the spun yarn 10 that has passed through the upstream guide 23 is guided from the base end of the yarn accumulating roller 21 to the outer peripheral surface 21a, and is wound around the cylindrical portion 21c a plurality of times.
  • the spun yarn 10 wound around the cylindrical portion 21c is fed gradually from the base end of the yarn accumulating roller 21 to the leading end thereof.
  • the spun yarn 10, which is fed from the leading end of the outer peripheral surface 21a passes through the flyer 38, and is fed downward via the downstream guide 26.
  • the yarn hooking member 22 rotates integrally with the yarn accumulating roller 21. In such a case, the yarn hooking member 22 operates so as to prevent the spun yarn 10 from being unwound from the leading end of the rotating yarn accumulating roller 21.
  • the yarn accumulating device 12 can eliminate yarn slackening and apply appropriate tension by unwinding the yarn when the downstream yarn tension increases and by stopping the yarn from being unwound when the yarn tension decreases (when the yarn is likely to slacken).
  • the yarn hooking member 22 operates so as to absorb change in tension of the spun yarn 10 between the yarn accumulating device 12 and the winding device 13. Accordingly, such a change in tension is prevented from influencing the spun yarn 10 between the spinning device 9 and the yarn accumulating device 12.
  • the spun yarn 10 can be pulled from the spinning machine 9 at a steady speed by the yarn accumulating device 12 having the above-described structure.
  • the yarn accumulating device 12 has various functions, and the accumulated amount of the spun yarn 10 wound around the yarn accumulating roller 21 increases or decreases accompanying performance of such functions.
  • the yarn clearer 52 transmits the yarn defect detection signal to the unit controller 60.
  • the unit controller 60 determines whether or not the yarn defect detection signal is the large slub detection signal (step S102). That is, the unit controller 60 stores a preset strength threshold value, and determines whether or not the received yarn defect detection signal value is equal to or less than such a strength threshold value.
  • the unit controller 60 detects a yarn defect in which yarn thickness is at least a preset thickness threshold value as a yarn defect in which yarn strength is equal to or less than the preset strength threshold value.
  • the unit controller 60 stops the spinning device 9 immediately (step S103 of Fig. 6 ). Accordingly, since twists are not applied to the fiber bundle 8, the spun yarn 10 is cut off at a position of the spinning device 9 in a manner in which a fiber sloughs off. Further, fiber waste is adhered on a yarn end 10a of the cut-off spun yarn 10.
  • step S104 by stopping the driving of the electric motor 25, the unit controller 60 stops the rotation of the yarn accumulating roller 21 (step S104).
  • the unit controller 60 stops the rotation of the yarn accumulating roller 21 (step S104).
  • the time lag since the yarn accumulating roller 21 is rotated forward, the spun yarn 10 including the yarn end 10a is wound around the yarn accumulating roller 21. In such a case, as illustrated in Fig. 7 , the yarn end 10a is guided from the base end of the yarn accumulating roller 21 to the outer peripheral surface 21a of the yarn accumulating roller 21.
  • the suction opening 30b is located near the outer peripheral surface of the base end of the yarn accumulating roller 21. Immediately after being wound around the yarn accumulating roller 21, the yarn end 10a is subjected to an influence of the suction airflow generated by the suction opening 30b. Accordingly, before the fiber waste adhered on the yarn end 10a flies apart from the yarn end 10a, the fiber waste can be sucked and removed by the suction opening 30b.
  • the spun yarn 10 including the yarn end 10a is unwound from the leading end of the yarn accumulating roller 21 towards downstream, and is wound around the package 45 by the winding device13. Furthermore, since the yarn defect detected by the yarn clearer 52 is included in the spun yarn 10 located downstream of the spinning device 9, a yarn portion including the yarn defect is also wound around the package 45 temporarily.
  • the spun yarn 10 including the yarn end 10a is sucked by the suction device 30 under a state in which the yarn end 10a receives an influence of the suction airflow at the suction opening 30b.
  • the influence of the suction airflow at the suction opening 30b is weak compared with force in which the winding device 13 pulls the spun yarn 10, the spun yarn 10 is also wound around the package.
  • the unit controller 60 controls the yarn splicing cart 3 to travel to front of the spinning unit 2 and to start a splicing operation (step S105 of Fig. 6 ).
  • the unit controller 60 controls the suction mouth 46 to swing to the vicinity of a surface the package 45 (refer to Fig. 8 ), generates suction airflow at a suction opening of the suction mouth 46, and also rotates the package 45 backward by the winding device 13. Accordingly, the yarn end (the lower yarn) is drawn from the outer peripheral surface of the package 45, and the lower yarn is sucked and caught by the suction mouth 46. Further, the yarn including the yarn defect can be removed from the package 45 by being drawn from the package 45 and being sucked by the suction mouth 46.
  • the unit controller 60 controls the suction mouth 46 sucking the lower yarn to swing upward to guide the lower yarn to the splicer 43 (refer to Fig. 9 ).
  • the unit controller 60 stops rotation of the package 45.
  • the unit controller 60 controls the suction pipe 44 to swing to the vicinity of the downstream side of the spinning device 9 (refer to Fig. 8 ).
  • the unit controller 60 re-drives the spinning device 9 or the like to restart the spinning operation, and suction airflow is generated at a suction opening of the suction pipe 44 to catch the yarn end (the upper yarn) at the spinning device 9 side. Then, by swinging the suction pipe 44 downward while continuing such suction, the spun yarn 10 is pulled from the spinning device 9 and the suction pipe 44 guides the spun yarn 10 to the splicer 43 (refer to Fig. 9 ).
  • the yarn splicing operation is performed by the splicer 43.
  • the spun yarn 10 is continuously fed from the spinning device 9.
  • the yarn accumulating roller 21 continues to rotate forward, slackening of the spun yarn 10 can be prevented by winding the spun yarn 10 around the yarn accumulating roller 21.
  • the yarn accumulating device 12 functions as a yarn slack eliminating device during the yarn splicing operation. Further, when the splicing operation performed by the splicer 43 is completed, the normal winding operation performed by the winding device 13 is restarted.
  • Fig. 10 is a perspective view illustrating a state immediately before a yarn breakage caused by the large slub occurs.
  • Fig. 11 is a perspective view illustrating a state immediately after the yarn breakage caused by the large slub occurs.
  • Fig. 12 is a perspective view illustrating a state in which stopping of the spinning device 9 is delayed and the spun yarn 10 is wound around the yarn accumulating roller 21.
  • Fig. 13 is a perspective view illustrating a state in which the spun yarn 10 remaining on the yarn accumulating roller 21 is removed by the suction device 30. Further, to simplify understanding of effects of the present embodiment, in the followings, a description will be made on a case in which a yarn accumulated amount on the yarn accumulating roller 21 is relatively low when the large slub is detected.
  • the large slub is a defective part having thickness which is equal to or thicker than the prescribed thickness compared with the average thickness of the yarn. Since the yarn has few yarn twists at a portion having the large slub, the yarn strength of such yarn portion is low; therefore, a yarn breakage is likely to occur.
  • Such a large slub 10b is illustrated in Fig. 10 .
  • control performed for the yarn defect detection signal other than the large slub detection signal is also performed when the large slub 10b is detected, the following problem arises.
  • the unit controller 60 immediately stops the spinning device 9 to cut off the spun yarn 10 at upstream of the yarn accumulating roller 21.
  • unnecessary spun yarn 10 remains on the yarn accumulating roller 21 in which one end of such spun yarn 10 is a yarn end generated by a stoppage of the spinning device 9 and another end of such spun yarn 10 is a yarn end generated by the yarn breakage caused by the large slub 10b.
  • the unit controller 60 performs the following control to avoid the above-described state in the present embodiment. That is, when receiving the large slub detection signal, the unit controller 60 does not stop the spinning device 9 immediately and controls the spinning device 9 to operate for a prescribed period of time (for example, for a period of time required to wind the yarn ten times around the yarn accumulating roller 21) (step S106 of Fig. 6 ).
  • the spun yarn 10 including the large slub 10b is wound around the yarn accumulating roller 21.
  • the winding device 13 also continues the winding operation, the spun yarn 10 is kept being pulled downstream.
  • the large slub 10b Since the large slub 10b is subjected to drag force upward in a substantially vertical direction (to an upper side in Fig. 10 ) when making contact with the flyer 38, a yarn breakage may occur at such a part (refer to Fig. 10 ).
  • the large slub 10b is divided into an upstream large slub 10c, which is a yarn end located upstream, and a downstream large slub 10d, which is a yarn end located downstream (refer to Fig. 11 ).
  • the downstream large slub 10d as well as the spun yarn 10 including the downstream large slub 10d are subjected to tension by the winding device 13, and are temporarily wound around the package 45. Meanwhile, since the yarn accumulating roller 21 still keeps rotating, the upstream large slub 10c may move accompanying such rotation; however, normally the upstream large slub 10c remains near the leading end of the yarn accumulating roller 21.
  • the unit controller 60 stops the spinning device 9 (step S106).
  • the spun yarn 10 which is generated during a time that elapses before the spinning device 9 is stopped, is wound around toward the base end of the outer peripheral surface 21a of the yarn accumulating roller 21 as described above (refer to Fig. 12 ). Further, as described above, the fibers are mostly untwisted in the yarn end 10a that is cut off by stoppage of the spinning device 9 (refer to Fig. 12 ) . Further, another end of the yarn end 10a is the upstream large slub 10c. As described above, when the large slub 10b in which yarn strength is low is generated, the unnecessary spun yarn 10 remains on the yarn accumulating roller 21.
  • the unit controller 60 stops the driving of the electric motor 25 to stop the rotation of the yarn accumulating roller 21 (step S107 of Fig. 6 ).
  • the suction opening 30b on the suction device 30 is located near the outer peripheral surface 21a of the yarn accumulating roller 21 and near the base end of the yarn accumulating roller 21, and generates the suction airflow.
  • the yarn end 10a rotates so as to be swung around in a radial direction of the yarn accumulating roller 21 at the base end thereof.
  • the rotating movement of the yarn end 10a is performed in a slow manner. Since the yarn end 10a moves as described above, the spun yarn 10 including the yarn end 10a is promptly caught by the suction opening 30b before or after the rotation of the yarn accumulating roller 21 is stopped (refer to Fig. 12 ).
  • the spinning device 9 is driven for a while after the large slub 10b is detected in step S106 of Fig. 6 . If the spinning device 9 is stopped promptly after the large slub 10b is detected, the following problems arise especially in a case in which an accumulated amount on the yarn accumulating roller 21 is low. That is, since the spun yarn 10 is sparsely wound around the yarn accumulating roller 21 in such a case, the rotating movement of the yarn end 10a is performed not at a position on the base end, but at a position that is slightly closer to the leading end than the former position. Accordingly, catching the yarn end 10a becomes difficult at the suction opening 30b located on the base end.
  • the spun yarn 10 may be unwound closer to the leading end by the yarn end 10a being swung.
  • the yarn end 10a is swung at a position closer to the leading end and likelihood that the suction opening 30b catches the yarn end 10a is further reduced.
  • the spun yarn 10 remaining or the yarn accumulating roller 21 must be removed by hand.
  • the likelihood that the suction device 30 catches the yarn end 10a can be raised by delaying the stoppage of the spinning device 9 at the detection of the large slub 10b as described above.
  • the unit controller 60 controls the yarn accumulating roller 21 to rotate backward promptly after stopping the rotation of the yarn accumulating roller 21 (step S108).
  • the spun yarn 10 accumulated on the yarn accumulating roller 21 is sequentially unwound from the base end of the yarn accumulating roller 21.
  • the spun yarn 10 accumulated on the yarn accumulating roller 21 is sequentially sucked by the suction device 30 (refer to Fig. 13 ).
  • the spun yarn 10 remaining on the yarn accumulating roller 21 when the large slub 10b has generated can be sucked and removed by the suction device 30.
  • the yarn splicing operation is started (step S105 of Fig. 6 ) and the spinning device 9 is driven.
  • the produced spun yarn 10 has been caught by the suction pipe 44, and the spun yarn 10 including the downstream large slub 10d is caught by the suction mouth 46.
  • both of the spun yarns 10 are guided to the splice 43, and the yarn splicing operation is performed.
  • the normal winding operation performed by the winding device 13 is restarted.
  • the spinning frame 1 includes the spinning device 9, the yarn clearer 52, the yarn accumulating roller 21, the electric motor 25, the suction opening 30b, the suction device 30, and the unit controller 60.
  • the spinning device 9 produces the spun yarn 10 by applying twists to the fiber bundle 8.
  • the yarn clearer 52 is arranged downstream of the spinning device 9 and detects the yarn defect of the travelling spun yarn 10.
  • the yarn accumulating roller 21 is arranged downstream of the yarn clearer 52 and accumulates the spun yarn 10 by rotating while winding the spun yarn around the outer peripheral surface 21a.
  • the electric motor 25 drives and rotates the yarn accumulating roller 21.
  • the suction opening 30b is arranged near the outer peripheral surface 21a of the yarn accumulating roller 21 and near the base end of the yarn accumulating roller 21.
  • the suction device 30 can generate suction airflow at the suction opening 30b.
  • the controller 60 controls the electric motor 25 such that when the yarn clearer 52 detects a prescribed yarn defect in which yarn strength is low, a stoppage timing, which is a timing at which the feeding of spun yarn 10 is stopped, is delayed compared with when other type of yarn defect is detected, and after such a stoppage timing, the rotation of the yarn accumulating roller 21 is stopped.
  • the spun yarn 10 is fed to the yarn accumulating roller 21 for a while even after such a yarn breakage occurs, the spun yarn 10 is wound around to the vicinity of the base end of the yarn accumulating roller 21.
  • the suction device 30 can easily suck the yarn end 10a.
  • the unnecessary spun yarn 10 wound around the yarn accumulating roller 21 is not necessary to be removed by hand even when such a yarn breakage occurs, and the spinning operation can be performed efficiently.
  • the yarn clearer 52 detects a yarn portion in which yarn thickness is thicker for at least a preset level than thickness of normal yarn as a prescribed yarn defect as the large slub 10b. Accordingly, the spinning frame 1 detects the large slub 10b in which yarn strength is low, and can appropriately perform control for removing the spun yarn 10 remaining on the yarn accumulating roller 21.
  • the unit controller 60 controls to stop the rotation of the yarn accumulating roller 21
  • the unit controller 60 controls the yarn accumulating roller 21 to rotate backward. Accordingly, the unnecessary spun yarn 10 sucked by the suction device 30 can be removed automatically from the yarn accumulating roller 21. As a result, the spun yarn 10 remaining on the yarn accumulating roller 21 is not necessary to be removed by hand, and the spinning operation can be performed efficiently.
  • the unit controller 60 stops the feeding of the spun yarn 10 by stopping twists applied by the spinning device 9. That is, by stopping the twists applied to the fiber bundle 8 by the spinning device 9, yarn strength in the spun yarn 10 becomes lower. In such a case, since the spun yarn 10 cannot endure tension and is cut off like being torn off, fibers in the yarn end becomes untwisted. Accordingly, such a yarn end 10a is likely to follow the suction airflow near the suction opening 30b, and the suction device 30 can easily suck the yarn end 10a.
  • the large slub has been described as a prescribed yarn defect
  • other defects such as an irregularity in thickness, in which yarn thickness is extremely thin can be considered as the prescribed yarn defect as long as the yarn defect has low yarn strength.
  • a determination standard for determining a large slub is not limited to the above-described embodiment, and the determination standard may be modified according to a shape or the like of the flyer 38 or the like.
  • a yarn breakage occurs due to the large slub 10b making contact with the flyer 38; however, control of the present embodiment is also effective when a yarn breakage occurs at other positions.
  • a yarn breakage may be a yarn breakage that may be caused by friction of the yarn against the outer peripheral surface 21a of the yarn accumulating roller 21, the downstream guide 26, or the like.
  • the feeding of the spun yarn 10 is stopped by stopping the spinning device 9.
  • other structures may be adopted instead of such a structure.
  • the feeding of the spun yarn 10 fed from the spinning device 9 to the yarn accumulating roller 21 can be stopped by other methods such as cutting the spun yarn 10 by the cutter 57 and stopping the back roller 16 of the draft device 7.
  • a shape of the suction device 30 is not limited to the above-described shape.
  • a suction opening may be formed on a leading end of a square tube shaped member.
  • each spinning unit 2 may include a structure for performing a yarn splicing operation.
  • the yarn hooking member 22 and the yarn accumulating roller 21 are not necessarily provided to be relatively rotatable.
  • a notch section formed on a slack eliminating roller can serve as a yarn hooking section.
  • a method for applying torque to the yarn hooking member 22 and the yarn accumulating roller 21 is not limited to a magnetic mechanism as described above, and frictional force or an electromagnetic mechanism can be used.

Claims (5)

  1. Fileuse (1) caractérisée en ce qu'elle comprend
    un dispositif de filage (9) qui produit un filé en appliquant des torsions à un faisceau de fibres,
    un dispositif de détection de défaut de fil (52) qui est disposé en aval du dispositif de filage (9) et détecte un défaut de fil dans le filé en déplacement,
    un rouleau d'accumulation de fil (21) qui est disposé en aval du dispositif de détection de défaut de fil (52) et accumule le filé délivré par le dispositif de filage (9) par rotation, tout en envidant le filé autour de sa surface périphérique extérieure,
    un moteur d'entraînement (25) qui entraîne et imprime un mouvement de rotation au rouleau d'accumulation de fil (21),
    une ouverture d'aspiration (30b) qui est disposée à proximité de la surface périphérique extérieure (21 a) du rouleau d'accumulation de fil (21) et à proximité d'une arête du rouleau d'accumulation de fil (21) où le filé est envidé,
    un dispositif d'aspiration (30) qui peut générer un débit d'air d'aspiration à l'ouverture d'aspiration (30b), et
    une section de commande (60) qui commande la rotation du moteur d'entraînement (25) de façon que, dans le cas où le dispositif de détection de défaut de fil (52) détecte un défaut de fil, dans lequel la résistance du fil est égale ou inférieure à une valeur seuil de résistance préréglée, le choix d'un moment d'interruption, qui est le moment, auquel la délivrance du filé par le dispositif de filage (9) au rouleau d'accumulation de fil (21) est interrompue, est différé par rapport au cas où un autre type de défaut de fil est détecté, et une fois le moment d'interruption choisi, la rotation du rouleau d'accumulation de fil (21) est interrompue.
  2. Fileuse (1) suivant la revendication 1, caractérisée en ce qu'étant donné que le défaut de fil, dans lequel la résistance du fil est égale ou inférieure à la valeur seuil de résistance préréglée, le dispositif de détection de défaut de fil (52) détecte un défaut de fil, dans lequel l'épaisseur du fil est au moins égale à une valeur seuil d'épaisseur préréglée.
  3. Fileuse (1) suivant la revendication 1 ou 2, caractérisée en ce que la section de commande (60) commande la rotation du moteur d'entraînement (25) de façon qu'après l'interruption de la rotation du rouleau d'accumulation de fil (21), un mouvement de rotation dans une direction opposée à celle, dans laquelle le rouleau d'accumulation de fil (21) tourne pendant l'envidage du filé, est imprimé au rouleau d'accumulation de fil (21).
  4. Fileuse (1) suivant une quelconque des revendications 1 à 3, caractérisée en ce que la section de commande (60) interrompt la délivrance du filé en interrompant le fonctionnement du dispositif de filage (9).
  5. Procédé d'enlèvement destiné à enlever du filé demeurant sur un rouleau d'accumulation de fil (21), caractérisé en ce qu'il comprend
    une étape de détection de défaut de fil pour détecter un défaut de fil déterminé, dans lequel la résistance du fil est égale ou inférieure à une valeur seuil de résistance préréglée, dans un filé produit par un dispositif de filage (9),
    une étape d'interruption de délivrance pour interrompre la délivrance du filé par le dispositif de filage (9), après écoulement d'une durée de temps fixée depuis la détection du défaut de fil déterminé,
    une étape d'interruption du rouleau d'accumulation de fil pour interrompre la rotation du rouleau d'accumulation de fil (21),
    une étape d'aspiration de l'extrémité du fil pour aspirer l'extrémité du filé demeurant sur le rouleau d'accumulation de fil (21) par une ouverture d'aspiration (30b) qui est disposée à proximité d'une surface périphérique extérieure (21a) du rouleau d'accumulation de fil (21) et à proximité d'une arête du rouleau d'accumulation de fil (21), où le filé est envidé et
    une étape d'enlèvement du fil pour enlever le filé en imprimant un mouvement de rotation au rouleau d'accumulation de fil (21) dans une direction dans laquelle le filé est dévidé du rouleau d'accumulation de fil (21).
EP10161969A 2009-08-06 2010-05-05 Fileuse et procédé de retrait de fil pour retirer le fil restant sur le rouleau d'accumulation de fils Not-in-force EP2284300B1 (fr)

Applications Claiming Priority (1)

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JP2009183655A JP2011038189A (ja) 2009-08-06 2009-08-06 紡績機及び糸貯留ローラに残留した紡績糸の除去方法

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EP2284300A1 EP2284300A1 (fr) 2011-02-16
EP2284300B1 true EP2284300B1 (fr) 2012-01-25

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JP (1) JP2011038189A (fr)
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DE102011053813A1 (de) * 2011-09-21 2013-03-21 Maschinenfabrik Rieter Ag Spinnmaschine sowie Verfahren zum Abführen eines Endabschnitts eines Garns an einer Spinnmaschine vor einem anschließenden Anspinnvorgang
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
JP2013067891A (ja) * 2011-09-21 2013-04-18 Murata Mach Ltd 紡績ユニット及び紡績機
CN102864537B (zh) * 2012-01-05 2014-09-17 杭州电子科技大学 一种集清纱与断纱检测一体的可编程化的控制器实现方法
JP2014009052A (ja) * 2012-06-28 2014-01-20 Murata Mach Ltd 繊維機械
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
JP2016102269A (ja) * 2014-11-27 2016-06-02 村田機械株式会社 糸巻取機
DE102015122391B4 (de) * 2015-12-21 2023-01-12 Rieter Ingolstadt Gmbh Verfahren zur Steuerung eines Anspinnprozesses zum Wiederanspinnen eines Garns an einer Spinnmaschine
JP2019123975A (ja) * 2018-01-19 2019-07-25 村田機械株式会社 吸引配管の合流構造、これを備えた糸巻取機及び紡績機
DE102019116671A1 (de) * 2019-06-19 2020-12-24 Maschinenfabrik Rieter Ag Spinnmaschine sowie Verfahren zum Betreiben einer Spinnstelle einer Spinnmaschine
EP3828325A1 (fr) * 2019-11-29 2021-06-02 Saurer Intelligent Technology AG Poste de filage et machine à filer à jet d'air comprenant un tel poste de filage et procédé de détermination d'une défaillance de la résistance à la traction d'un fil
CN111041728B (zh) * 2019-12-31 2020-09-22 艾百合纺织科技(安徽)有限公司 基于断纱智能监控系统的防断纱方法

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JP3960418B2 (ja) * 2002-02-28 2007-08-15 Ｙｋｋ株式会社 糸切れ防止装置及び同糸切れ防止手段を有する糸条加工機類
JP4048902B2 (ja) 2002-10-07 2008-02-20 村田機械株式会社 紡績機の糸弛み取り装置
DE102006014475A1 (de) * 2006-03-29 2007-10-04 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren zur Steuerung einer Textilmaschine, Vorrichtung zur Durchführung des Verfahrens sowie Textilmaschine
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ATE542936T1 (de) 2012-02-15
EP2284300A1 (fr) 2011-02-16
JP2011038189A (ja) 2011-02-24
CN101994175B (zh) 2014-07-16

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