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EP2559644B1 - Dispositif de bobinage de fil et procédé de déroulement de fil - Google Patents

Dispositif de bobinage de fil et procédé de déroulement de fil Download PDF

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Publication number
EP2559644B1
EP2559644B1 EP12163739.1A EP12163739A EP2559644B1 EP 2559644 B1 EP2559644 B1 EP 2559644B1 EP 12163739 A EP12163739 A EP 12163739A EP 2559644 B1 EP2559644 B1 EP 2559644B1
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EP
European Patent Office
Prior art keywords
yarn
cylinder
feeding bobbin
bobbin
yarn feeding
Prior art date
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Application number
EP12163739.1A
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German (de)
English (en)
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EP2559644A2 (fr
EP2559644A3 (fr
Inventor
Ken Miyano
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Murata Machinery Ltd
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Murata Machinery Ltd
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Publication of EP2559644A2 publication Critical patent/EP2559644A2/fr
Publication of EP2559644A3 publication Critical patent/EP2559644A3/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/22—Guides for filamentary materials; Supports therefor adapted to prevent excessive ballooning of material

Definitions

  • the present invention relates to a yarn winding device that winds a yarn unwound from a yarn feeding bobbin, and to a yarn unwinding method.
  • Automatic winders that form a package by unwinding a yarn produced by a spinning machine or the like from a yarn feeding bobbin are known in the art. Such automatic winders join yarn ends of yarns coming from a plurality of yarn feeding bobbins while removing a yarn defect, such as a slub, and wind the yarn to form the package.
  • Japanese Patent Application Laid-open No. H10-29765 discloses an automatic winder that includes a yarn unwinding assisting device that regulates a bulge of a curved path (also referred to as "balloon") of an unwound yarn to stabilize a yarn tension during unwinding to prevent yarn breakage.
  • the yarn unwinding assisting device disclosed in Japanese Patent Application Laid-open No. H10-29765 includes a movable cylinder put on to cap a top end portion (end portion on a side from which the yarn is unwound) of a yarn feeding bobbin supported upright.
  • the movable cylinder is moved down to keep up with advancement of yarn unwinding from the yarn feeding bobbin.
  • This movable cylinder regulates the bulge of the curved path of the yarn unwound from the yarn feeding bobbin so as not to exceed a predetermined extent. Accordingly, the shape of the balloon is stabilized, so that the yarn unwinding tension is stabilized, and yarn breakage is prevented.
  • a yarn winding device includes a bobbin support section that supports a yarn feeding bobbin having a core tube onto which a yarn is wound; a yarn winding section that unwinds the yarn from the yarn feeding bobbin supported by the bobbin support section to form a package; and a yarn unwinding assisting device that assists unwinding of the yarn from the yarn feeding bobbin, the yarn unwinding assisting device includes a cylinder put on to cap an end portion of the yarn feeding bobbin, the end portion being on a side from which the yarn is unwound, to regulate a bulge of a curved path of the yarn being unwound from the yarn feeding bobbin.
  • An inner diameter of the cylinder is greater than or equal to 28 mm and less than or equal to 30 mm.
  • a yarn unwinding method for unwinding a yarn from a yarn feeding bobbin that includes a core tube, onto which the yarn is wound includes preparing a cylinder having an inner diameter greater than or equal to 28 mm and less than or equal to 30, and a core tube having an outer diameter greater than or equal to 17 mm and less than or equal to 22 mm; and arranging the cylinder to cap an end portion of the core tube, the end portion being on a side from which the yarn is unwound, with the cylinder and the yarn feeding bobbin coaxially situated to regulate a bulge of a curved path of the yarn unwound from the yarn feeding bobbin using the cylinder.
  • FIG. 1 is a side view of one of the winding units 1 of the automatic winder. Meanwhile, the right side in FIG. 1 , from where an operator operates the winding unit 1, is defined as a front (forward) side, while the left side, which is opposite to the front side, is defined as a back (rear) side.
  • each of the winding units 1 includes a bobbin supplying device 2, a bobbin support section 3, a yarn winding section 4, and a unit controller 5 that controls these sections of the winding unit 1.
  • the winding unit 1 winds a spun yarn Y unwound from a yarn feeding bobbin 8 onto a winding tube 6 while causing the spun yarn Y to traverse to thereby form a package P of a predetermined shape.
  • the yarn feeding bobbin 8 is supported by the bobbin support section 3 and the yarn feeding bobbin 8 is supplied to the bobbin support section 3 by the bobbin supplying device 2.
  • the bobbin supplying device 2 houses a plurality of the cylindrical yarn feeding bobbins 8. Each of the yarn feeding bobbins 8 is formed by winding a yarn onto a core tube 9.
  • the bobbin supplying device 2 supplies the yarn feeding bobbins 8 to the bobbin support section 3 one by one. More specifically, the bobbin supplying device 2 includes a columnar magazine 10 that houses a plurality of the cylindrical yarn feeding bobbins 8, and a guide chute 11 arranged below the magazine 10.
  • the guide chute 11 causes one yarn feeding bobbin 8 housed in the magazine 10 to fall onto the bobbin support section 3 while guiding the yarn feeding bobbin 8.
  • a support frame 12 is detachably attached to a machine base 7 of the winding unit 1 with, for example, screws.
  • Each of the magazine 10 and the guide chute 11 is attached to the support frame 12 in a posture slightly inclined toward the front side with respect to the vertical direction so as to face a peg 16 of the bobbin support section 3.
  • the magazine 10 is rotatable about a rotation shaft 13 attached to the support frame 12.
  • a plurality of circumferentially arranged not shown bobbin slots, each capable of housing one yarn feeding bobbin 8, is defined in the magazine 10.
  • a bobbin receiving plate 14 that receives the yarn feeding bobbins 8 housed in the bobbin slots is arranged below the magazine 10.
  • a not shown through-hole is defined in the bobbin receiving plate 14.
  • the bobbin receiving plate 14 is configured such that when one yarn feeding bobbin 8 among the yarn feeding bobbins 8 in the bobbin slots is positioned above the through-hole by rotation of the magazine 10, that yarn feeding bobbin 8 falls in the guide chute 11 via the through-hole.
  • the guide chute 11 includes a pair of opening/closing members 15 that are laterally paired. When the opening/closing members 15 are in an open state, the guide chute 11 guides the yarn feeding bobbin 8 falling from the magazine 10 to the bobbin support section 3. In contrast, when the opening/closing members 15 are in a closed state, the guide chute 11 prevents the yarn feeding bobbin 8 from falling from the magazine 10 to the bobbin support section 3.
  • the bobbin support section 3 includes the peg 16 and a flap plate 17.
  • the peg 16 supports the yarn feeding bobbin 8 by being inserted into a bottom end portion of the core tube 9 of the bobbin 8.
  • the flap plate 17 discharges the yarn feeding bobbin 8 held by the peg 16 out of the bobbin support section 3.
  • the peg 16 includes a first holding piece 16a, which is a projecting piece, and a second holding piece 16b, which is a projecting piece shorter than the first holding piece 16a.
  • the first holding piece 16a and the second holding piece 16b are swingable forward and backward.
  • the second holding piece 16b is also pivotable relative to the first holding piece 16a.
  • the first holding piece 16a and the second holding piece 16b have an openable/closable structure.
  • the peg 16 is inclined toward the front with the first holding piece 16a and the second holding piece 16b in the closed state so that these two holding pieces 16a and 16b are inserted into the bottom end portion of the core tube 9 of the yarn feeding bobbin 8 that has obliquely fallen from the magazine 10 by being guided by the guide chute 11.
  • the second holding piece 16b is pivoted relative to the first holding piece 16a to bring the holding pieces 16a and 16b into an open state, and the holding pieces 16a and 16b are further pivoted toward the back side.
  • the yarn feeding bobbin 8 is held in an upright posture as shown in FIG. 1 .
  • This upright posture of the yarn feeding bobbin 8 is, as mentioned later, a reference posture during yarn unwinding.
  • the flap plate 17 is on standby in a horizontal state shown in FIG. 1 when the yarn feeding bobbin 8 is held in the upright state by the peg 16. In this state, the flap plate 17 is in contact with the bottom end of the yarn feeding bobbin 8. The flap plate 17 is pivoted toward the front from this state to toss the yarn feeding bobbin 8 mounted on the flap plate 17 forward, thereby discharging the yarn feeding bobbin 8.
  • pivoting motion of the peg 16 and pivoting motion of the flap plate 17 described above are realized by a support-section motor 18.
  • the driving of the support-section motor 18 is controlled by the unit controller 5.
  • a stepping motor can be used as the support-section motor 18.
  • a yarn unwinding assisting device 20, a tension applying device 21, a yarn joining device 22, a clearer 23, and a waxing device 24 are arranged in this order from the side of the bobbin support section 3 on a yarn path between the bobbin support section 3 and the yarn winding section 4.
  • the yarn unwinding assisting device 20 moves down a movable cylinder (cylinder) 31, which is put on to cap a top end portion of the yarn feeding bobbin 8, to keep up with advancement of unwinding of the yarn Y to thereby regulate a bulge of a curved path (balloon) of the yarn Y being unwound. This results in stabilizing an unwinding tension.
  • the configuration of the yarn unwinding assisting device 20 is explained in detail later.
  • the tension applying device 21 applies a predetermined tension to the running yarn Y.
  • a tension applying device 21 for example, a gate type tension applying device can be used.
  • the gate type tension applying device has fixed comb teeth and movable comb teeth arranged to be movable relative to the fixed comb teeth.
  • the yarn joining device 22 joins a yarn (lower yarn) coming from the side where the yarn is fed and a yarn (upper yarn) coming from the side where the yarn is wound when the yarn is cut upon detection of a yarn defect by the clearer 23, which will be described next, or when a yarn breakage occurs during yarn unwinding from the yarn feeding bobbin 8.
  • a yarn joining device 22 for example, an air-type yarn joining device (air splicer) can be used as the yarn joining device 22 .
  • the air splicer includes untwisting nozzles that untwist an end of the upper yarn and an end of the lower yarn, respectively, and a twisting nozzle that causes a swirling airflow to act on the two untwisted yarn ends to thereby twist the yarn ends together.
  • the clearer 23 detects a yarn defect, such as a slub.
  • a cutter that cuts a yarn when a yarn defect is detected is attached to the clearer 23.
  • the waxing device 24 applies wax to the yarn Y.
  • a lower-yarn catching-and-guiding member 25 that sucks and catches the lower yarn from the bobbin 8 and guides the lower yarn to the yarn joining device 22 is arranged below the yarn joining device 22.
  • An upper-yarn catching-and-guiding member 26 that sucks and catches the upper yarn from the package P and guides the upper yarn to the yarn joining device 22 is arranged above the yarn joining device 22.
  • the upper-yarn catching-and-guiding member 26 is configured like a pipe and supported so as to be pivotable up and down about a shaft 26a.
  • the upper-yarn catching-and-guiding member 26 has, at its leading end, a mouth 26b.
  • the lower-yarn catching-and-guiding member 25 is also configured like a pipe and supported so as to be pivotable up and down about a shaft 25a.
  • the lower-yarn catching-and-guiding member 25 has, at its leading end, a suction port 25b.
  • a not shown negative pressure source is connected to each of the lower-yarn catching-and-guiding pipe 25 and the upper-yarn catching-and-guiding member 26 so that air is sucked through the mouth 26b and the suction port 25b to catch the yarn ends of the upper yarn and the lower yarn.
  • the yarn winding section 4 includes a cradle 27 and a traversing drum 28.
  • the cradle 27 includes a pair of cradle arms that rotatably and detachably supports the winding tube 6.
  • the traversing drum 28 can come into contact with a surface of the winding tube 6 supported by the cradle 27 or a surface of the package P formed on the winding tube 6.
  • the yarn winding section 4 rotates the traversing drum 28, which is in contact with the winding tube 6 (or the surface of the package P), using a not shown drum driving motor, thereby causing the winding tube 6 to be rotated (rotated in a linked manner) by rotation of the traversing drum 28 while causing the yarn Y to traverse so that the package P is formed on the outer peripheral surface of the winding tube 6.
  • FIG. 2 is a side view of the yarn unwinding assisting device 20.
  • FIG. 3 is a front view of the yarn unwinding assisting device 20. Meanwhile, FIG. 3 includes a partially cut-away view to make the diagram easier to understand. As shown in FIGS.
  • the yarn unwinding assisting device 20 includes a fixed restricting member 30 fixed to the machine base 7, the movable cylinder 31 that is movable up and down relative to the fixed restricting member 30, a chase-portion detecting sensor 32 (detecting section) that detects a chase portion 8a (a tapered yarn layer portion on the top end portion from which the yarn is unwound) of the yarn feeding bobbin 8, and an ascending/descending mechanism (moving mechanism) 33 that moves the movable cylinder 31 up and down.
  • FIG. 4 is a perspective view of the fixed restricting member 30 and the movable cylinder 31.
  • the fixed restricting member 30 is fixed to the machine base 7 of the winding unit.
  • a restricting portion 30a that regulates a yarn path of the yarn unwound from the yarn feeding bobbin 8 is arranged on a bottom end of the fixed restricting member 30.
  • the movable cylinder 31 includes a straight cylinder portion 31a having a uniform internal diameter in a cylinder-axis direction and a tapered cylinder portion 31b that extends from a bottom end of the straight cylinder portion 31a and has a diameter that gradually increases toward its bottom.
  • the straight cylinder portion 31a of the movable cylinder 31 surrounds the fixed restricting member 30.
  • the restricting portion 30a of the fixed restricting member 30 is housed inside the straight cylinder portion 31a of the movable cylinder 31.
  • the movable cylinder 31 is put on to cap the top end portion of the yarn feeding bobbin 8 such that the movable cylinder 31 and the core tube 9 of the yarn feeding bobbin 8 that is in the upright posture (reference posture during unwinding) are coaxially situated.
  • the fixed restricting member 30 and the movable cylinder 31 are configured to guide a yarn end of a yarn coming from the yarn feeding bobbin 8 to insides of the fixed restricting member 30 and the movable cylinder 31 when the yarn feeding bobbin 8 falls on the peg 16 of the bobbin support section 3. More specifically, as shown in FIG. 4 , the fixed restricting member 30 includes a guide portion 30b that guides the yarn end to the restricting portion 30a.
  • the movable cylinder 31 has a slit 31c that extends along the entire length from the straight cylinder portion 31a to the tapered cylinder portion 31b.
  • the movable cylinder 31 also includes a guide portion 31d on the straight cylinder portion 31a.
  • the guide portion 31d protrudes outward from an edge of the slit 31c to guide the yarn end to the slit 31c.
  • This configuration causes the yarn end of the yarn from the falling yarn feeding bobbin 8 to be guided through the slit 31c of the movable cylinder 31 to inside of the movable cylinder 31 by a not shown yarn-bringing lever and the guide portion 31d and, furthermore, to the restricting portion 30a of the fixed restricting member 30 housed in the straight cylinder portion 31a.
  • the chase-portion detecting sensor 32 is a transmission-type photosensor that includes a light-emitting element 32a and a light-receiving element 32b.
  • the light-emitting element 32a is arranged on one of the cover members 34, and the light-receiving element 32b is arranged on other of the cover members 34 facing each other. As can be seen in FIG. 3 , a pair of cover members 34, which are laterally paired, is mounted on a side surface of the movable cylinder 31 such that the top end portion of the yarn feeding bobbin 8 is positioned therebetween.
  • the chase-portion detecting sensor 32 is a transmission-type photosensor that includes a light-emitting element 32a and a light-receiving element 32b.
  • the light-emitting element 32a is arranged on one of the cover members 34, and the light-receiving element 32b is arranged on other of the cover members 34 facing each other.
  • an optical path extending from the light-emitting element 32a to the light-receiving element 32b passes through a position slightly outside the core tube 9 of the uprightly held yarn feeding bobbin 8. Only when a yarn is wound on the core tube 9, light is shielded by a yarn layer on the core tube 9, causing the chase-portion detecting sensor 32 to detect the yarn layer (the chase portion 8a). Meanwhile, as shown in FIG. 1 , a result of detection (detection signal relating to the chase portion 8a) output from the chase-portion detecting sensor 32 is transmitted to the unit controller 5.
  • the ascending/descending mechanism 33 that moves the movable cylinder 31 up and down includes an ascending/descending motor 35 (driving section), which is a stepping motor, and a screw mechanism 36 (transmission mechanism) that transmits a driving force of the ascending/descending motor 35 to the cover members 34.
  • the screw mechanism 36 is directly coupled to a drive shaft of the ascending/descending motor 35.
  • the screw mechanism 36 includes a vertically extending threaded shaft 37 and a nut member 38 that is screwed onto the threaded shaft 37 and coupled to the cover members 34.
  • a vertically extending guide shaft 39 is inserted through the nut member 38.
  • the unit controller 5 controls the ascending/descending motor 35 based on the result of detection (as to whether the chase portion 8a has been detected) output from the chase-portion detecting sensor 32. More specifically, when the chase-portion detecting sensor 32 cannot detect the yarn layer of the chase portion 8a anymore because yarn unwinding has advanced, the unit controller 5 controls the ascending/descending motor 35 to move down the movable cylinder 31 in the cylinder-axis direction until the chase-portion detecting sensor 32 again detects the chase portion 8a.
  • winding is performed in a state where the movable cylinder 31 has been moved down to cap the top end portion of the yarn feeding bobbin 8. Accordingly, as shown in FIGS. 1 to 3 , the movable cylinder 31 prevents a balloon of the yarn Y unwound from the chase portion 8a from bulging to an extent exceeding a predetermined extent. Therefore, a yarn tension of the unwound yarn is stabilized. In addition, the unwound yarn is smoothly guided into the straight cylinder portion 31a because the tapered cylinder portion 31b is prepared on the bottom end portion of the straight cylinder portion 31a of the movable cylinder 31. This leads to further stabilization of the yarn unwinding tension and reduction in hairiness.
  • the movable cylinder 31 is moved in the cylinder-axis direction by the ascending/descending mechanism 33 to keep up with advancement of yarn unwinding from the yarn feeding bobbin 8. Accordingly, the balloon can be formed in a uniform shape by securing a fixed clearance between the chase portion 8a of the yarn feeding bobbin 8 and the movable cylinder 31, thereby achieving stable yarn unwinding. Furthermore, the restricting portion 30a of the fixed restricting member 30 regulates the yarn path so as to be always at the same position, and the balloon having its base point at the restricting portion 30a is regulated by the movable cylinder 31. Accordingly, the shape of the balloon is further stabilized.
  • the driving section (the ascending/descending motor 35) is dedicated for moving the movable cylinder 31. Accordingly, movement of the movable cylinder 31 can be controlled independently without bothering about operations of other operating sections of the winding unit 1. Furthermore, using the stepping motor as the driving section of the movable cylinder 31 makes it possible to control the movement of the movable cylinder 31 easily by adjusting the number of drive pulses of the stepping motor. Furthermore, damage is prevented even in case of a trouble where the movable cylinder 31 should become unmovable by being caught by another member because the motor 35 goes out of step in such a case. Furthermore, movement of the movable cylinder 31 can be controlled accurately using the screw mechanism 36 as the transmission mechanism that transmits the driving force of the ascending/descending motor 35. Furthermore, another advantage is that the current state can be maintained even if the driving force of the ascending/descending motor 35 should be lost.
  • a yarn winding speed e.g., to 1,700 m/min or higher
  • the balloon may not bulge out sufficiently because of a small yarn layer, and the yarn may be unwound without forming a balloon.
  • the yarn that has been just unwound is likely to be rubbed against the surface of the yarn layer, and sloughing is likely to occur, resulting in frequent yarn breakages. This situation is likely to occur when, particularly, an amount of the yarn on the yarn feeding bobbin 8 is equal to or smaller than one-third a fully wound amount.
  • an inner diameter d2 of the movable cylinder 31 shown in FIG. 3 is set to a value slightly greater than an outer diameter D1 of the top end portion of the core tube 9 of the yarn feeding bobbin 8 so that the balloon bulges out sufficiently even when yarn winding is performed at a high winding speed. More specifically, for the outer diameter D1 of the top end portion of the yarn feeding bobbin 8 (that is, greater than or equal to 17 mm and less than or equal to 22 mm), the inner diameter d2 of the straight cylinder portion 31a of the movable cylinder 31 is set to greater than or equal to 28 mm and less than or equal to 30 mm.
  • the inner diameter of the movable cylinder 31 When the inner diameter of the movable cylinder 31 is relatively small, an upper portion of the balloon is narrowed, while the balloon is continuously formed at its lower portion that is closer to the yarn layer. Accordingly, the yarn that has been just unwound is less likely to come into contact with the surface of the yarn layer, and sloughing is prevented.
  • a configuration of the winding unit 1 is available in which yarn feeding bobbins with the core tubes 9 having different diameters are prepared, and yarn feeding bobbins having a certain diameter are selected for use among those.
  • the movable cylinders 31 having different inner diameters are prepared, and the movable cylinders 31 having an inner diameter appropriate for the selected yarn feeding bobbins 8 is used.
  • An example where two types of the yarn feeding bobbins 8 that differ from each other in outer diameter of the core tube 9 are used is described below.
  • the outer diameter D1 of the top end portion of the yarn feeding bobbin 8 to be used is greater than or equal to 17 mm and less than or equal to 20 mm
  • the movable cylinder 31 with an inner diameter 28 mm is used.
  • the movable cylinder 31 with an inner diameter 30 mm is used.
  • the clearance between the yarn feeding bobbin 8 and the movable cylinder 31 put on to cap the yarn feeding bobbin 8 is small.
  • the movable cylinder 31 comes into contact with the yarn feeding bobbin 8 even by a slight tilt of the yarn feeding bobbin 8 from the upright posture (the posture where the yarn feeding bobbin 8 and the movable cylinder 31 are coaxially situated) which is the reference posture during yarn unwinding, resulting in defective unwinding.
  • the winding unit 1 further includes a posture adjuster for maintaining the upright posture of the yarn feeding bobbin 8 and causing an axis of the core tube 9 of the yarn feeding bobbin 8 to coincide with an axis L of the movable cylinder 31.
  • FIGS. 5A to 5C are diagrams for explaining the posture adjustment of the yarn feeding bobbin 8.
  • the yarn feeding bobbin 8 is supplied by the bobbin supplying device 2 to the bobbin support section 3, the yarn feeding bobbin 8 is held by the peg 16 (see FIG. 1 ) of the bobbin support section 3. Thereafter, the peg 16 pivots rearward, bringing the yarn feeding bobbin 8 to the upright posture as shown in FIG. 5A .
  • the axis of the yarn feeding bobbin 8 is slightly tilted relative to the axis L of the movable cylinder 31.
  • the axis of the yarn feeding bobbin 8 is caused to coincide with the axis L of the movable cylinder 31 in this state as described below.
  • the unit controller 5 controls the support-section motor 18 that drives the peg 16 to cause the yarn feeding bobbin 8 to pivot (swing) frontward (to the right side in FIG. 5A ).
  • the chase-portion detecting sensor 32 detects the top end portion of the yarn feeding bobbin 8 as shown in FIG. 5B
  • the unit controller 5 causes the yarn feeding bobbin 8 to stop pivoting.
  • the unit controller 5 includes a storing section that stores therein in advance number of pulses required to drive the support-section motor 18 to swing the yarn feeding bobbin 8 rearward (to the left in FIG. 5B ) from a position shown in FIG. 5B , at which the chase-portion detecting sensor 32 detects the yarn feeding bobbin 8, to bring the yarn feeding bobbin 8 into the reference posture in which the yarn feeding bobbin 8 and the movable cylinder 31 have a common axis.
  • the unit controller 5 outputs the number of pulses stored in the storing section to the support-section motor 18 and causes the yarn feeding bobbin 8 to swing rearward by an angle corresponding to the number of pulses.
  • the unit controller 5 can cause the axis of the yarn feeding bobbin 8 to coincide with the axis L of the movable cylinder 31.
  • the axis of the core tube 9 of the yarn feeding bobbin 8 is caused to coincide with the axis L of the movable cylinder 31 and thereafter the movable cylinder 31 is moved down to cap the end portion of the yarn feeding bobbin 8 as described above. Accordingly, even when the clearance between the movable cylinder 31 and the core tube 9 of the yarn feeding bobbin 8 is small, contact between the movable cylinder 31 and the yarn feeding bobbin 8 is less likely to occur. Therefore, the inner diameter of the movable cylinder 31 can be set to greater than or equal to 28 mm and less than or equal to 30 mm, which is only slightly larger than the outer diameter of the core tube 9 of the yarn feeding bobbin 8. Accordingly, even when yarn winding is performed at a high winding speed, the balloon of the unwound yarn bulges out sufficiently, and occurrences of sloughing are reduced.
  • FIG. 6 is an external view of concrete examples of the yarn feeding bobbins used in this experiment. Yarn types and major dimensions of the two types of yarn feeding bobbins shown in FIG. 6 are given in Table 1. Note that the yarn counts in Table 1 are English yarn counts. Table 1 BOBBIN YARN TYPE YARN COUNT MAJOR OUTSIDE DIMENSIONS (mm) a b L D1 D2 A COMBED COTTON YARN Ne40 30 50 205 18.1 39 B CARDED COTTON YARN Ne30 28 58.6 220 20.4 45.6
  • the inner diameters (indicated by d2 in FIG. 3 ) of the straight cylinder portions of the movable cylinders were 28 mm (hereinafter, this movable cylinder is referred to as “ ⁇ 28 cylinder “), 30 mm (hereinafter, “ ⁇ 30 cylinder “), 32 mm (hereinafter, “ ⁇ 32 cylinder ”) , 34 mm (hereinafter, “ ⁇ 34 cylinder “), and 38 mm (hereinafter, " ⁇ 38 cylinder ").
  • the number of occurrences of sloughing per yarn feeding bobbin of each of the two types of yarn feeding bobbins were measured at different winding speeds and with the movable cylinders of different diameters.
  • FIGS. 7 and 8 show results of the measurement. Note that, regarding FIG. 8 , tests with ⁇ 38 cylinder which is the largest one of the movable cylinders at winding speeds of 1600 m/min or higher were not performed because sloughing occurs frequently with ⁇ 38 cylinder even at a relatively low winding speed of 1400 m/min to 1500 m/min and it is easily predictable that sloughing occurs still more frequently at a winding speed higher than the relatively low winding speed.
  • the number of occurrences of sloughing with ⁇ 32 cylinder increased sharply with an increase in the winding speed, while the number of occurrences of sloughing with ⁇ 28 cylinder is maintained considerably small even at high-speed winding of 1700 m/min.
  • the results for the bobbin B shown in FIG. 8 the number of occurrences of sloughing when the movable cylinder having the small diameter, i.e., ⁇ 30 cylinder, was used is considerably small as compared with occurrences of sloughing with ⁇ 34 cylinder and ⁇ 38 cylinder, the larger diameter movable cylinders. It can be understood from the above discussion that the sloughing can be considerably suppressed by using the movable cylinder having the inner diameter greater than or equal to 28 mm and less than or equal to 30 mm.
  • the bobbin supplying device 2 is a so-called magazine-type bobbin supplying device that causes the yarn feeding bobbin 8 to fall from the magazine 10 to the peg 16 of the bobbin support section 3.
  • the guide portions 30b and 31d, and the slit 31c are arranged on the fixed restricting member 30, and the movable cylinder 31 is arranged for introducing a yarn end of a yarn coming from the yarn feeding bobbin 8 to inside the fixed restricting member 30 and the movable cylinder 31 when the yarn feeding bobbin 8 falls from the magazine 10 (see FIG. 4 ).
  • a simple annular shape free from a slit and a simple cylindrical shape free from a slit for the fixed restricting member 30 and the movable cylinder 31 can be used by causing the yarn end to be inserted into the fixed restricting member 30 and the movable cylinder 31 in their axial direction.
  • this configuration of the first modification is suitably applicable to the bobbin supplying device 2 when the bobbin supplying device 2 is a so-called tray-type automatic winder that includes a tray, into which the yarn feeding bobbin 8 can be inserted upright, and supplies the yarn feeding bobbin 8 together with the tray to a yarn-unwinding position below the movable cylinder 31.
  • An example of the tray-type automatic winder is disclosed in Japanese Patent Application Laid-open No. H8-127471.
  • the ascending/descending mechanism 33 of the movable cylinder 31 need not necessarily include the ascending/descending motor 35 (stepping motor) and the screw mechanism 36 according to the above embodiments.
  • an air cylinder can be used in place of the stepping motor as the driving section.
  • the air cylinder it is possible to linearly move the movable cylinder 31 due to reciprocating motions of a rod of the air cylinder. Accordingly, the structure of the transmission mechanism that transmits the driving force of the driving section to the movable cylinder 31 can be simplified.
  • the transmission mechanism of the ascending/descending mechanism 33 can include a transmission belt 40 coupled to the movable cylinder 31 to transmit the driving force of the driving section (in FIG. 9 , the ascending/descending motor 35) to the movable cylinder 31 via the transmission belt 40.
  • a transmission belt 40 coupled to the movable cylinder 31 to transmit the driving force of the driving section (in FIG. 9 , the ascending/descending motor 35) to the movable cylinder 31 via the transmission belt 40.
  • the yarn unwinding assisting device 20 includes the fixed restricting member 30 that includes the restricting portion 30a.
  • a configuration that does not include the fixed restricting member 30 and regulates the balloon only using the movable cylinder 31 can be employed.
  • the movable cylinder 31 moves up and down with advancement of yarn unwinding.
  • the cylinder can be fixed at a certain position.
  • the posture adjustment is performed before yarn unwinding to cause the yarn feeding bobbin 8 to take the reference posture (in which the yarn feeding bobbin 8 and the cylinder 31 have the common axis) using the chase-portion detecting sensor 32 that detects the chase portion 8a during yarn unwinding.
  • the chase-portion detecting sensor 32 that detects the chase portion 8a during yarn unwinding.
  • a sensor dedicated for detecting whether the yarn feeding bobbin 8 is in the reference posture can be provided.
  • the bobbin support section 3 is capable of maintaining the posture of the yarn feeding bobbin 8 highly stably and constantly holding the yarn feeding bobbin 8 in the reference posture during yarn unwinding, posture adjustment such as that described above is not necessary.
  • Exemplary configurations of such a bobbin support section that provides high posture stability include those described below.
  • the bobbin support section can include a core member 41 that is insertable into the core tube 9 of the yarn feeding bobbin 8 and an annular elastic member 42 formed of rubber and the like arranged around the core member 41.
  • the core member 41 is brought into close contact with an inner surface of the core tube 9 by a not-shown diameter-expanding mechanism that expands the diameter of the annular elastic member 42 as shown in FIG. 10B .
  • the elastic member can be a bag-like (balloon-like) member that can be inflated by injecting air.
  • the bobbin support section can include three or more projecting pieces each insertable into the core tube 9 of the yarn feeding bobbin 8, and these projecting pieces support the core tube 9 in cooperation with one another (although not shown, an example of this configuration is disclosed in Japanese Patent Application Laid-open No. 2006-89284 ).
  • the posture of the yarn feeding bobbin 8 is likely to slightly fluctuate, causing the axis of the core tube 9 to deviate from the axis of the cylinder.
  • a yarn winding device includes a bobbin support section that supports a yarn feeding bobbin having a core tube onto which a yarn is wound, a yarn winding section that unwinds the yarn from the yarn feeding bobbin supported by the bobbin support section to form a package, and a yarn unwinding assisting device that assists unwinding of the yarn from the yarn feeding bobbin.
  • the yarn unwinding assisting device includes a cylinder put on to cap an end portion, which is on a side from which the yarn is unwound, of the yarn feeding bobbin to regulate a bulge of a curved path of the yarn being unwound from the yarn feeding bobbin.
  • An inner diameter of the cylinder is greater than or equal to 28 millimeters (mm) and less than or equal to 30 mm.
  • the inner diameter of the cylinder to be put on to cap the end portion on the side from which the yarn is unwound of the yarn feeding bobbin is greater than or equal to 28 mm and less than or equal to 30 mm. Accordingly, even when yarn winding is performed at a high winding speed, the balloon bulges out sufficiently, and occurrences of sloughing are reduced.
  • the yarn unwinding assisting device includes a detecting section that detects a yarn layer of the yarn feeding bobbin and outputs a result of detection, and a moving mechanism that moves the cylinder toward the yarn layer in a cylinder-axis direction based on the result of detection output from the detection section.
  • the cylinder can be moved in the cylinder-axis direction to keep up with advancement of yarn unwinding from the yarn feeding bobbin. Accordingly, it is possible to maintain a uniform shape of the balloon, thereby stabilizing yarn unwinding.
  • the yarn unwinding assisting device includes a fixed restricting member that includes a restricting portions, and the cylinder is arranged to surround the fixed restricting member and movable in the cylinder-axis direction relative to the fixed restricting member.
  • the cylinder that regulates the balloon moves in the cylinder-axis direction relative to the fixed restricting member that includes the restricting portion. Accordingly, the restricting portion of the fixed restricting member regulates the yarn path to always be at the same position, and the balloon having its base point at the restricting portion is regulated using the cylinder. As a result, the shape of the balloon is further stabilized.
  • the yarn unwinding assisting device includes a driving section that generates a driving force, and a transmission mechanism that transmits the driving force of the driving section to the cylinder to move the cylinder in a cylinder-axis direction.
  • the driving section is provided only for moving the cylinder. Accordingly, movement of the cylinder can be controlled independently without depending on operations of other operating sections of the yarn winding device.
  • the driving section is a stepping motor.
  • the moving of the cylinder can be controlled easily by adjusting the number of drive pulses of the stepping motor. Furthermore, damage is prevented even in a case where the cylinder should become unmovable by being caught by another member at an occurrence of a trouble because the motor goes out of step in such a case.
  • the driving section is an air cylinder.
  • the transmission mechanism is a screw mechanism.
  • the transmission mechanism includes a transmission belt coupled to the cylinder.
  • the transmission mechanism By configuring the transmission mechanism to transmit the driving force via the transmission belt that does not use an oil solution, such as a lubricant, occurrences of trouble caused by sticking of fly waste flying around the yarn winding device to the transmission mechanism can be reduced.
  • an oil solution such as a lubricant
  • the cylinder in the yarn winding device according to the above aspects, includes a straight cylinder portion having a uniform inner diameter greater than or equal to 28 mm and less than or equal to 30 mm, and a tapered cylinder portion extending from an end portion of the straight cylinder portion on a side of the yarn feeding bobbin.
  • the tapered cylinder portion has a first end portion toward the straight cylinder portion and a second end portion away from the straight cylinder portion.
  • the tapered cylinder portion is tapered such that an inner diameter of the tapered cylinder portion increases from the first end portion toward the second end.
  • the tapered cylinder portion formed on the end portion of the straight cylinder portion causes the unwound yarn to be smoothly guided into the straight cylinder portion. Accordingly, the yarn unwinding tension can be further stabilized and hairiness can be reduced.
  • the cylinder configured in this way regulates the balloon at the end portion (portion where the straight cylinder portion is connected to the tapered cylinder portion) of the straight cylinder portion. Accordingly, an inner diameter of the straight cylinder portion be preferably greater than or equal to 28 mm and less than or equal to 30 mm.
  • the yarn winding device further includes a posture adjuster that adjusts a posture of the yarn feeding bobbin during yarn unwinding to cause the core tube of the yarn feeding bobbin and the cylinder to have a common axis.
  • the posture adjuster can cause the yarn feeding bobbin and the axis of the cylinder to have the common axis. Accordingly, even when a clearance between the cylinder and the core tube of the yarn feeding bobbin is small, contact between the cylinder and the yarn feeding bobbin is less likely to occur.
  • the bobbin support section includes at least three projecting pieces that are insertable into the core tube of the yarn feeding bobbin to support the core tube in cooperation with one another.
  • the core tube is held by at least three projecting pieces. Accordingly, a state where the core tube and the cylinder have the common axis can be maintained.
  • the bobbin support section includes a core member insertable into the core tube of the yarn feeding bobbin, and an elastic member that is arranged around the core member and to be brought into close contact with an inner surface of the core tube when the core member is inserted into the core tube.
  • the posture of the yarn feeding bobbin is stabilized because the elastic member arranged around the core member is brought into close contact with the inner surface of the core tube in a state where the core member is inserted into the core tube of the yarn feeding bobbin. Accordingly, the state where the core tube and the cylinder have the common axis can be maintained.
  • a yarn unwinding method for unwinding a yarn from a yarn feeding bobbin that includes preparing a cylinder having an inner diameter greater than or equal to 28 mm and less than or equal to 30 mm, and a core tube having an outer diameter greater than or equal to 17 mm and less than or equal to 22 mm; and arranging the cylinder to cap an end portion of the core tube, the end portion being on a side from which the yarn is unwound, with the cylinder and the yarn feeding bobbin coaxially situated to regulate a bulge of a curved path of the yarn unwound from the yarn feeding bobbin using the cylinder.
  • the core tube of the yarn feeding bobbin and the cylinder are caused to have the common axis and thereafter the cylinder is put on to cap the end portion of the yarn feeding bobbin. Accordingly, even when the clearance between the cylinder and the core tube of the yarn feeding bobbin is small, contact between the cylinder and the yarn feeding bobbin is less likely to occur. Therefore, the inner diameter of the cylinder can be set to greater than or equal to 28 mm and less than or equal to 30 mm which is slightly larger than the outer diameter of the core tube of the yarn feeding bobbin. Accordingly, even when yarn winding is performed at a high winding speed, the balloon of the unwound yarn bulges out sufficiently, and occurrences of sloughing are reduced.
  • a cylinder having an inner diameter of 28 mm is used when the outer diameter of the core tube of the yarn feeding bobbin is greater than or equal to 17 mm and less than or equal to 20 mm, and a cylinder having an inner diameter of 30 mm is used when the outer diameter of the core tube of the yarn feeding bobbin is greater than 20 mm and equal to or smaller than 22 mm.

Landscapes

  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Unwinding Of Filamentary Materials (AREA)

Claims (15)

  1. Dispositif d'enroulement de fil comprenant :
    une section de support de bobine (3) qui supporte une bobine d'amenée de fil (8) présentant un tube de base (9), sur lequel un fil (y) est enroulé ;
    une section d'enroulement de fil (4) qui déroule le fil (y) de la bobine d'amenée de fil (8) supportée par la section de support de bobine (3) pour former un ensemble (p) ; et
    un dispositif d'assistance au déroulement de fil (20) qui assiste le déroulement du fil (y) de la bobine d'amenée de fil (8), le dispositif d'assistance au déroulement de fil (20) comporte un cylindre (31) placé dessus pour chapeauter une partie d'extrémité de la bobine d'amenée de fil (8), la partie d'extrémité étant sur un côté, duquel le fil (y) est déroulé, pour réguler un renflement d'une trajectoire courbée du fil (y) qui est déroulé de la bobine d'amenée de fil (8), caractérisé en ce que
    un diamètre intérieur du cylindre (31) est de 8 à 11 mm plus grand qu'un diamètre extérieur des tubes de base (9) des bobines d'amenée de fil (8) devant être supportées par la section de support de bobine (3) ou est supérieur ou égal à 28 mm et inférieur ou égal à 30 mm.
  2. Dispositif d'enroulement de fil selon la revendication 1, caractérisé en ce que le dispositif d'assistance au déroulement de fil (20) comporte
    une section de détection (32) qui détecte une couche de fil de la bobine d'amenée de fil (8) et sort un résultat de détection ; et
    un mécanisme de déplacement (33) qui déplace le cylindre (31) vers la couche de fil dans une direction d'axe de cylindre sur la base du résultat de la détection sortie de la section de détection (32).
  3. Dispositif d'enroulement de fil selon la revendication 2, caractérisé en ce que
    le dispositif d'assistance au déroulement de fil (20) comporte un élément de restriction fixé (30) qui comporte une partie de restriction (30a) et
    le cylindre (31) est agencé pour entourer l'élément de restriction fixé (30) et est mobile dans la direction d'axe de cylindre relative à l'élément de restriction fixé (30).
  4. Dispositif d'enroulement de fil selon la revendication 2 ou 3, caractérisé en ce que le mécanisme de déplacement (33) comporte
    une section d'entraînement (35) qui génère une force d'entraînement ; et
    un mécanisme de transmission (36) qui transmet la force d'entraînement de la section d'entraînement (35) au cylindre (31) pour déplacer le cylindre (31) dans une direction d'axe de cylindre.
  5. Dispositif d'enroulement de fil selon la revendication 4, caractérisé en ce que la section d'entraînement (35) est un moteur pas à pas.
  6. Dispositif d'enroulement de fil selon la revendication 4, caractérisé en ce que la section d'entraînement (35) est un cylindre à air.
  7. Dispositif d'enroulement de fil selon l'une quelconque des revendications 4 à 6, caractérisé en ce que le mécanisme de transmission (36) est un mécanisme à vis.
  8. Dispositif d'enroulement de fil selon l'une quelconque des revendications 4 à 6, caractérisé en ce que le mécanisme de transmission (36) comporte une courroie de transmission (40) couplée au cylindre (31).
  9. Dispositif d'enroulement de fil selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le cylindre (31) comporte :
    une partie de cylindre droite (31a) présentant un diamètre intérieur uniforme supérieur ou égal à 28 mm et inférieur ou égal à 30 mm ; et
    une partie de cylindre conique (31b) qui s'étend depuis une partie d'extrémité de la partie de cylindre droite (31a) sur un côté de la bobine d'amenée de fil, la partie de cylindre conique (31b) présentant une première partie d'extrémité vers la partie de cylindre droite et une seconde partie d'extrémité loin de la partie de cylindre droite, la partie de cylindre conique étant conique de sorte qu'un diamètre intérieur de la partie de cylindre conique augmente de la première partie d'extrémité (31b) vers la seconde extrémité.
  10. Dispositif d'enroulement de fil selon l'une quelconque des revendications 1 à 9, caractérisé par un ajusteur de posture qui ajuste une posture de la bobine d'amenée de fil (8) pendant le déroulement de fil pour amener le tube de base (9) de la bobine d'amenée de fil (8) et le cylindre (31) à avoir un axe commun (L).
  11. Dispositif d'enroulement de fil selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la section de support de bobine (3) comporte au moins trois pièces en saillie insérables dans le tube de base (9) de la bobine d'amenée de fil (8) pour supporter le tube de base (9) en coopération les unes avec les autres.
  12. Dispositif d'enroulement de fil selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la section de support de bobine (3) comporte
    un élément de base (41) insérable dans le tube de base (9) de la bobine d'amenée de fil (8) ; et
    un élément élastique (42) qui est agencé autour de l'élément de base (41) et pour être amené en contact proche avec une surface intérieure du tube de base (9) lorsque l'élément de base (41) est inséré dans le tube de base (9).
  13. Procédé de déroulement de fil pour dérouler un fil (y) d'une bobine d'amenée de fil (8) qui comporte un tube de base (9), sur lequel le fil (y) est enroulé, le procédé de déroulement de fil étant caractérisé par les étapes suivantes :
    la préparation d'un cylindre (31) présentant un diamètre intérieur de 8 à 11 mm supérieur à un diamètre extérieur d'un tube de base (9) d'une bobine d'amenée de fil (9) à dérouler ; et
    l'agencement du cylindre (31) pour chapeauter une partie d'extrémité du tube de base (9), la partie d'extrémité étant sur un côté, duquel le fil est déroulé, le cylindre (31) et la bobine d'amenée de fil (8) étant situés coaxialement pour réguler un renflement d'une trajectoire courbée du fil (y) déroulé de la bobine d'amenée de fil en utilisant le cylindre (31).
  14. Dispositif d'enroulement de fil selon la revendication 13, caractérisé en ce que la préparation comporte la préparation d'un cylindre (31) présentant un diamètre intérieur de 28 mm comme cylindre (31) et un tube de base (9) d'une bobine d'amenée de fil (8) avec un diamètre extérieur supérieur ou égal à 17 mm et inférieur ou égal à 20 mm comme tube de base (9).
  15. Dispositif d'enroulement de fil selon la revendication 13, caractérisé en ce que la préparation comporte la préparation d'un cylindre (31) présentant un diamètre intérieur de 30 mm comme cylindre (31) et un tube de base (9) d'une bobine d'amenée de fil (8) avec un diamètre extérieur supérieur à 20 mm et égal ou inférieur à 22 mm comme tube de base (9).
EP12163739.1A 2011-08-09 2012-04-11 Dispositif de bobinage de fil et procédé de déroulement de fil Active EP2559644B1 (fr)

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JP2011173598A JP2013035664A (ja) 2011-08-09 2011-08-09 糸巻取装置及び糸解舒方法

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Publication number Priority date Publication date Assignee Title
JP2013035664A (ja) * 2011-08-09 2013-02-21 Murata Machinery Ltd 糸巻取装置及び糸解舒方法
JP2015020887A (ja) * 2013-07-22 2015-02-02 村田機械株式会社 解舒補助装置及び自動ワインダ
CN109709994B (zh) * 2018-12-18 2024-08-06 青岛宏大纺织机械有限责任公司 一种气圈跟踪传动方法及装置
JP2020172362A (ja) * 2019-04-10 2020-10-22 村田機械株式会社 ガイド筒
IT201900009687A1 (it) * 2019-06-21 2020-12-21 Savio Macch Tessili Spa Dispositivo e metodo per il controllo di un balloon durante la dipanatura di un filato da una spola
CN112830325A (zh) * 2021-03-03 2021-05-25 广东溢达纺织有限公司 管纱退绕气圈控制装置以及管纱纱线退绕设备

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JPH0356777U (fr) * 1989-10-05 1991-05-31
JPH0811666B2 (ja) * 1991-09-19 1996-02-07 村田機械株式会社 自動ワインダの解舒補助装置
US5377923A (en) * 1991-07-01 1995-01-03 Murata Kikai Kabushiki Kaisha Yarn unwinding assisting device and yarn unwinding method in an automatic winder
JP2531396B2 (ja) * 1991-09-19 1996-09-04 村田機械株式会社 解舒補助装置の制御方法
JPH08127471A (ja) 1994-10-28 1996-05-21 Murata Mach Ltd ワインダの解舒補助装置
JP2871607B2 (ja) 1996-07-10 1999-03-17 村田機械株式会社 解舒装置
DE102004045747A1 (de) 2004-09-21 2006-03-23 Saurer Gmbh & Co. Kg Aufsteckdorn für eine Arbeitsstelle eines Kreuzspulautomaten
DE102005036704A1 (de) * 2005-08-04 2007-02-15 Saurer Gmbh & Co. Kg Spulstelle einer Kreuzspulen herstellenden Textilmaschine
CN2841692Y (zh) * 2005-11-21 2006-11-29 周明刚 卡簧式锭杆结合件
JP2009149404A (ja) * 2007-12-20 2009-07-09 Murata Mach Ltd 解舒補助装置及びそれを備える自動ワインダ
JP2009242028A (ja) * 2008-03-28 2009-10-22 Murata Mach Ltd 自動ワインダーの糸解舒補助装置、および自動ワインダー
CN101891085B (zh) * 2010-08-05 2013-01-16 青岛宏大纺织机械有限责任公司 自动络筒机退绕张力的均匀控制方法及控制装置
CN201761975U (zh) * 2010-08-10 2011-03-16 上海申安纺织有限公司 一种自动络筒机的纱线退绕气圈环
JP2013035664A (ja) * 2011-08-09 2013-02-21 Murata Machinery Ltd 糸巻取装置及び糸解舒方法

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Publication number Publication date
JP2013035664A (ja) 2013-02-21
EP2559644A2 (fr) 2013-02-20
EP2559644A3 (fr) 2015-09-30
CN102923531A (zh) 2013-02-13
CN202924473U (zh) 2013-05-08
CN102923531B (zh) 2016-12-28

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