EP3312118A1 - Garnaufwicklungsvorrichtung und paketentschleunigungsverfahren - Google Patents

Garnaufwicklungsvorrichtung und paketentschleunigungsverfahren Download PDF

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Publication number
EP3312118A1
EP3312118A1 EP17192340.2A EP17192340A EP3312118A1 EP 3312118 A1 EP3312118 A1 EP 3312118A1 EP 17192340 A EP17192340 A EP 17192340A EP 3312118 A1 EP3312118 A1 EP 3312118A1
Authority
EP
European Patent Office
Prior art keywords
yarn
package
section
drum
pressure
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.)
Granted
Application number
EP17192340.2A
Other languages
English (en)
French (fr)
Other versions
EP3312118B1 (de
Inventor
Tatsuo Jinyama
Yoshifuto Sone
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
Original Assignee
Murata Machinery Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP3312118A1 publication Critical patent/EP3312118A1/de
Application granted granted Critical
Publication of EP3312118B1 publication Critical patent/EP3312118B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • 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
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/22—Automatic winding machines, i.e. machines with servicing units for automatically performing end-finding, interconnecting of successive lengths of material, controlling and fault-detecting of the running material and replacing or removing of full or empty cores
    • B65H54/26—Automatic winding machines, i.e. machines with servicing units for automatically performing end-finding, interconnecting of successive lengths of material, controlling and fault-detecting of the running material and replacing or removing of full or empty cores having one or more servicing units moving along a plurality of fixed winding units
    • 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
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/46—Package drive drums
    • B65H54/48—Grooved drums
    • 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
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/74—Driving arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/36—Floating elements compensating for irregularities in supply or take-up of material
    • 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 yarn winding device and a method of decelerating a package formed by the yarn winding device.
  • a yarn winding device that forms a package by winding on a winding tube a yarn supplied from a yarn supplying section is disclosed in Japanese Patent Application Laid-Open No. 2016-78995 .
  • the disclosed yarn winding device includes a traversing drum that rotates while being in contact with the package to rotate the package and also traverses a yarn (traversing).
  • the disclosure explains problems arising when the yarn is decelerated in a state in which the package is being rotated by the traversing drum while the package is in contact with the traversing drum.
  • 2016-78995 has a configuration in which the traversing drum and the package are decelerated in such a manner that a difference between a circumferential speed of the traversing drum and a circumferential speed of the package is controlled to be equal to or lower than a predetermined value.
  • the yarn winding device disclosed in Japanese Patent Application Laid-Open No. 2016-78995 includes a roller driving source that rotationally drives the traversing drum, a package brake that brakes rotation of the package by being in contact with the package, and a controlling section that controls the roller driving source and the package brake.
  • the controlling section decelerates the package and the traversing drum in a short time by decelerating the package by using the package brake. Accordingly, the stitching arising when the sliding amount is large is prevented and an efficient deceleration control can be implemented.
  • the frequency of occurrence of the stitching can be decreased by making a sliding amount small in the yarn winding device disclosed in Japanese Patent Application Laid-Open No. 2016-78995 , that does not mean that the occurrence of the stitching during deceleration of the package can be prevented completely.
  • the yarn protrudes from an end of the package that is on the other side of the end on which the winding position shifted leading to occurrence of the stitching.
  • One object of the present invention is to surely prevent occurrence of stitching when a package is decelerated while the package is being formed.
  • the controlling section when decelerating the package while maintaining a state in which the package and the traversing drum are in contact with each other and the yarn is being wound on the package, controls the braking device based on a detection result obtained in each of the package rotational speed detecting section and the drum rotational speed detecting section such that a circumferential speed of the package is slower than a circumferential speed of the traversing drum.
  • a package deceleration method for decelerating a package is implemented in a yarn winding device.
  • the yarn winding device includes a support member that supports a winding tube on which a yarn from a yarn supplying section can be wound; a traversing drum that rotates while being in contact with the package that is formed by winding of the yarn on the winding tube thereby rotating the package while traversing the yarn; and a braking device that brakes rotation of the package.
  • the package deceleration method includes, when decelerating the package while maintaining a state in which the package and the traversing drum are in contact with each other and the yarn is being wound on the package, controlling the braking device such that a circumferential speed of the package is slower than a circumferential speed of the traversing drum.
  • the controlling section when decelerating the package while maintaining a state in which the package and the traversing drum are in contact with each other and the yarn is being wound on the package, controls the braking device based on a detection result obtained in each of the package rotational speed detecting section and the drum rotational speed detecting section such that a circumferential speed of the package is slower than a circumferential speed of the traversing drum.
  • the circumferential speed of the package when decelerating the package while the yarn is being wound on the winding tube, the circumferential speed of the package is made slower than the circumferential speed of the traversing drum.
  • a traversing width of the yarn on the package that is, a distance for which the yarn performs one reciprocation traversing by the rotation of the traversing drum, is narrow. Accordingly, the winding position of the yarn on the package is shifted to a central portion in the traversing direction, and also a winding width of the yarn decreases. Therefore, the occurrence of the stitching when the package is decelerated while the package is being formed can be prevented surely.
  • the controlling section controls the braking device such that a difference between the circumferential speed of the package and the circumferential speed of the traversing drum is in a range of 50 m/min to 1000 m/min.
  • the difference between the circumferential speed of the package and the circumferential speed of the traversing drum, that is, a sliding amount is in the range of 50 m/min to 1000 m/min.
  • the above yarn winding device further includes a holder attached to the support member and capable of rotatably holding the winding tube.
  • the holder includes holder bodies that engage with ends of the winding tube in a rotation axis direction.
  • the braking device further includes a chamber to which fluid is supplied; and a resistance generating section capable of being pressed against the holder body from one side in the rotation axis direction depending on a fluid pressure in the chamber.
  • the braking device further includes a fluid pressure changing section that changes a pressure of the fluid supplied to the chamber.
  • the fluid pressure changing section provides a control such that a rate of increase of the pressure of the fluid in the chamber before the pressure of the fluid reaches an action initiation pressure at which a braking force by the resistance generating section begins to act on the package is higher than a rate of increase of the pressure of the fluid in the chamber after the pressure of the fluid has crossed the action initiation pressure.
  • the resistance generating section can generate a sufficient braking force when being pressed against the holder body with a force of a certain magnitude or above. That is, the effect of the deceleration operation by the resistance generating section cannot be expected until when the fluid pressure reaches a pressure of a certain value. That is, during the increase of the fluid pressure to the certain value, although no braking force acts on the holder body, the holder body is pushed in the rotation axis direction by the resistance generating section leading to the occurrence of the stitching.
  • the rate of increase of the pressure of the fluid before the pressure of the fluid reaches the action initiation pressure at which the braking force by the resistance generating section begins to act on the package is higher than the rate of increase of the pressure of the fluid after the pressure of the fluid has crossed the action initiation pressure. Because of this, the pressure of the fluid supplied to the chamber reaches the action initiation pressure in a short time. Accordingly, a mismatch between a timing at which the package is pushed by the resistance generating section and a timing at which the winding width of the yarn becomes narrow because of the reason that the circumferential speed of the package is slower than the circumferential speed of the traversing drum becomes small. Accordingly, the occurrence of the stitching because of the winding position misalignment of the yarn can be prevented.
  • the controlling section first operates the braking device to start the deceleration of the package and thereafter controls the drum driving section to decelerate the traversing drum.
  • the traversing drum is decelerated after starting the deceleration of the package, the circumferential speed of the package can be surely made slower than the circumferential speed of the traversing drum whereby the occurrence of the stitching can be prevented. Moreover, because not only the package is decelerated by using the braking device but also the traversing drum is decelerated thereafter, an excessive increase of the sliding amount can be avoided.
  • the above yarn winding device further includes a yarn accumulating section arranged between the yarn supplying section and a package forming section and capable of accumulating the yarn supplied from the yarn supplying section; and a yarn joining device arranged between the yarn supplying section and the yarn accumulating section and capable of joining a yarn end from the yarn supplying section and a yarn end from the yarn accumulating section to each other when the yarn is not continuous between the yarn supplying section and the yarn accumulating section.
  • the controlling section when the yarn joining device is performing the yarn joining, controls the drum driving section and the braking device to decelerate the traversing drum and the package.
  • the formation of the package is continued by pulling the yarn accumulated in the yarn accumulating section while the yarn joining is performed by the yarn joining device.
  • the yarn is continuous between the yarn accumulating section and the package, in the process of deceleration of the package while taking care that the yarn accumulated in the yarn accumulating section does not dry up, there are chances of occurrence of the stitching because of the winding position misalignment of the yarn.
  • the winding width of the yarn becomes narrow whereby the occurrence of the stitching can be prevented.
  • a package deceleration method for decelerating a package is implemented in a yarn winding device.
  • the yarn winding device includes a support member that supports a winding tube on which a yarn from a yarn supplying section can be wound; a traversing drum that rotates while being in contact with the package that is formed by winding of the yarn on the winding tube thereby rotating the package while traversing the yarn; and a braking device that brakes rotation of the package.
  • the package deceleration method includes, when decelerating the package while maintaining a state in which the package and the traversing drum are in contact with each other and the yarn is being wound on the package, controlling the braking device such that a circumferential speed of the package is slower than a circumferential speed of the traversing drum.
  • a traversing width of the yarn on the package that is, a distance for which the yarn performs one reciprocation traversing by the rotation of the traversing drum, is narrow and also a winding width of the yarn decreases. Therefore, the occurrence of the stitching when the package is decelerated while the package is being formed can be prevented surely.
  • the controlling includes controlling such that a difference between the circumferential speed of the package and the circumferential speed of the traversing drum is in a range of 50 m/min to 1000 m/min.
  • the difference between the circumferential speed of the package and the circumferential speed of the traversing drum is in the range of 50 m/min to 1000 m/min.
  • the yarn winding device further includes a holder attached to the support member and capable of rotatably holding the winding tube.
  • the holder includes holder bodies that engage with ends of the winding tube in a rotation axis direction.
  • the braking device further includes a chamber to which fluid is supplied; a resistance generating section capable of being pressed against the holder body from one side in the rotation axis direction depending on a fluid pressure in the chamber; and a fluid pressure changing section that changes a pressure of the fluid supplied to the chamber.
  • the controlling includes controlling such that a rate of increase of the pressure of the fluid in the chamber before the pressure of the fluid reaches an action initiation pressure at which a braking force by the resistance generating section begins to act on the package is higher than a rate of increase of the pressure of the fluid in the chamber after the pressure of the fluid has crossed the action initiation pressure.
  • the controlling includes first operating the braking device to start the deceleration of the package and thereafter controlling a drum driving section to decelerate the traversing drum.
  • the circumferential speed of the package can be surely made slower than the circumferential speed of the traversing drum whereby the occurrence of the stitching can be prevented. Moreover, an excessive increase of the sliding amount can be avoided.
  • the yarn winding device further includes a yarn accumulating section arranged between the yarn supplying section and a package forming section and capable of accumulating the yarn supplied from the yarn supplying section; and a yarn joining device arranged between the yarn supplying section and the yarn accumulating section and capable of joining a yarn end from the yarn supplying section and a yarn end from the yarn accumulating section to each other when the yarn is not continuous between the yarn supplying section and the yarn accumulating section.
  • the controlling includes, when the yarn joining device is performing the yarn joining, controlling the drum driving section and the braking device to decelerate the traversing drum and the package.
  • the yarn joining device when the yarn is continuous between the yarn accumulating section and the package, in the process of deceleration of the package, there are chances of occurrence of the stitching because of the winding position misalignment of the yarn.
  • the above package deceleration method like the above yarn winding device, because the package is decelerated such that the circumferential speed of the package is slower than the circumferential speed of the traversing drum, the winding width of the yarn becomes narrow whereby the occurrence of the stitching can be prevented.
  • FIG. 1 a direction along which a plurality of winding units is arranged is taken as a left-right direction and a direction in which the gravity acts is taken as an up-down direction. Moreover, a direction orthogonal to the left-right direction and the up-down direction is taken as a front-back direction.
  • FIG. 1 is a front view of the automatic winder 1 according to the present embodiment.
  • FIG. 2 is a block diagram of an electrical configuration of the automatic winder 1.
  • the automatic winder 1 includes a plurality of winding units 2 (yarn winding device of the present invention), a doffing device 3, a controlling device 4, and the like.
  • the winding units 2 are arranged along the left-right direction. Each of the winding units 2 forms a package 100 by winding on a winding bobbin Bm (winding tube of the present invention) a yarn Y unwound from a yarn supplying bobbin Bk.
  • the doffing device 3 is arranged above the winding units 2 so as to be movable in the left-right direction. Upon receiving a fully-wound signal from a given winding unit 2, the doffing device 3 moves above that winding unit 2 and performs operations of removing the fully wound package 100, mounting an empty winding bobbin Bm in the winding unit 2, and the like.
  • the controlling device 4 as shown in FIG.
  • the controlling device 4 performs communication with these controlling sections.
  • FIG. 3 is a schematic side view of the winding unit 2.
  • FIG. 4 is a front view of a later-explained package forming section 12.
  • the winding unit 2 as shown in FIGS. 2 and 3 , includes a yarn supplying section 11, the package forming section 12, a yarn accumulating section 13, a yarn joining device 33 and a yarn clearer 36 arranged between the yarn supplying section 11 and the yarn accumulating section 13, the unit controlling section 15, and the like.
  • the yarn supplying section 11 is for supplying the yarn Y that has been wound on the yarn supplying bobbin Bk, and it is arranged at a lower end of the winding unit 2. As shown in FIG. 3 , the yarn supplying section 11 includes a yarn supplying bobbin supporting member 21.
  • the yarn supplying bobbin supporting member 21 supports the yarn supplying bobbin Bk such that the yarn supplying bobbin Bk stands substantially vertical.
  • the yarn supplying bobbin supporting member 21 discharges an empty yarn supplying bobbin Bk. After the empty yarn supplying bobbin Bk is discharged, a new yarn supplying bobbin Bk is supplied from a not-shown bobbin supplying device to the yarn supplying bobbin supporting member 21.
  • the package forming section 12 is for forming the package 100 by winding the yarn Y on the winding bobbin Bm, and it is arranged at an upper end of the winding unit 2. As shown in FIGS. 3 and 4 , the package forming section 12 includes a cradle 51 (support member of the present invention), a traversing drum 52, a braking device 53, and the like.
  • the cradle 51 has, as shown in FIG. 4 , a pair of cradle arms 51a and 51b.
  • the cradle arms 51a and 51b are supported so as to be pivotable around an axis 54.
  • the cradle arms 51a and 51b pivot so as to move toward or away from the traversing drum 52.
  • Bobbin holders 56 (holder of the present invention) and 57 are attached to tip ends of the cradle arms 51a and 51b, respectively, for rotatably holding the winding bobbin Bm.
  • the bobbin holders 56 and 57 have holder bodies 58 and 59, respectively, that engage with respective ends of the winding bobbin Bm in a rotation axis direction of the winding bobbin Bm.
  • the cradle 51 is configured such that a cone-shaped winding bobbin Bm can be mounted thereon.
  • the holder body 58 is arranged on a large diameter side and the holder body 59 is arranged on a small diameter side of the winding bobbin Bm, and the holder bodies 58 and 59 rotate integrally with the winding bobbin Bm.
  • a later-explained braking cylinder 60 is arranged inside the bobbin holder 56.
  • a package rotational speed sensor 61 (package rotational speed detecting section of the present invention) is arranged near the bobbin holder 57. The package rotational speed sensor 61 detects a rotational speed of the package 100 and outputs the detected value to the unit controlling section 15.
  • the traversing drum 52 is rotationally driven by a drum driving motor 62 (drum driving section of the present invention).
  • drum driving motor 62 drum driving section of the present invention.
  • a traversing groove 52a is formed on an outer peripheral surface of the traversing drum 52.
  • the yarn Y can be caused to traverse with a predetermined width.
  • a drum rotational speed sensor 63 (drum rotational speed detecting section of the present invention) is arranged near the traversing drum 52.
  • the drum rotational speed sensor 63 detects a rotational speed of the traversing drum 52 and outputs the detected value to the unit controlling section 15.
  • the braking device 53 is for braking the rotation of the package 100. The details are explained later.
  • the yarn accumulating section 13 is for temporarily accumulating the yarn Y unwound from the yarn supplying bobbin Bk.
  • the yarn accumulating section 13 is arranged below the package forming section 12. As shown in FIG. 3 , the yarn accumulating section 13 includes a yarn accumulating drum 41, a drum driving motor 42, a yarn guiding member 43, and an upper yarn blowdown device 44.
  • the yarn accumulating drum 41 is a substantially cylindrical member.
  • the yarn Y is accumulated by winding the yarn Y on an outer peripheral surface of the yarn accumulating drum 41.
  • the drum driving motor 42 rotationally drives the yarn accumulating drum 41.
  • the yarn guiding member 43 is a tubular member. One end of the yarn guiding member 43 is arranged so as to oppose an end of the yarn accumulating drum 41 along a rotation axis direction of the yarn accumulating drum 41.
  • the yarn Y travels from the yarn supplying section 11 to the yarn guiding member 43 and inside the yarn guiding member 43, and the yarn Y is guided to the yarn accumulating drum 41.
  • the upper yarn blowdown device 44 is arranged adjacent to the yarn guiding member 43.
  • the upper yarn blowdown device 44 is connected to a compressed air source.
  • the upper yarn blowdown device 44 blows down the yarn Y of the upper part (yarn Y on the yarn accumulating section 13 side) during yarn joining explained later.
  • the drum driving motor 42 rotationally drives the yarn accumulating drum 41
  • the yarn Y is guided to the yarn accumulating drum 41 by the yarn guiding member 43, and the yarn Y is wound around the outer peripheral surface of the yarn accumulating drum 41.
  • the wound yarn Y is pulled from the yarn accumulating drum 41 and wound on the package 100 when the drum driving motor 62 of the package forming section 12 rotates the traversing drum 52 and the package 100.
  • the yarn Y can be pulled from the yarn accumulating section 13, and the package forming section 12 can continue a winding operation of the yarn Y.
  • the yarn joining device 33 is arranged between the yarn supplying section 11 and the yarn accumulating section 13.
  • the yarn joining device 33 performs the yarn joining of the yarn Y from the yarn supplying section 11 (hereinafter, "lower yarn Y1”) and the yarn Y from the yarn accumulating section 13 (hereinafter, "upper yarn Y2").
  • a device that uses compressed air for example, can be used as the yarn joining device 33.
  • the yarn joining device 33 jets compressed air on the lower yarn Y1 and the upper yarn Y2 to once untwist yarn ends of both the yarns. Thereafter, the yarn joining device 33 again jets the compressed air on both the yarn ends to perform the yarn joining by intertwining the yarn ends together.
  • the yarn clearer 36 is arranged between the yarn supplying section 11 and the yarn accumulating section 13.
  • the yarn clearer 36 monitors a thickness of the yarn Y and the like to detect a yarn defect.
  • a not-shown cutter is arranged near the yarn clearer 36 for cutting the yarn Y.
  • the yarn clearer 36 detects absence of the yarn Y and outputs to the unit controlling section 15 a detection signal representing the detection of absence of the yarn Y.
  • the cutter upon detecting the yarn defect, the cutter immediately cuts the yarn Y, and the yarn clearer 36 outputs to the unit controlling section 15 a detection signal representing the detection of the yarn defect.
  • the winding unit 2 includes various structural components, other than the yarn joining device 33 and the yarn clearer 36 mentioned above, between the yarn supplying section 11 and the yarn accumulating section 13. That is, as shown in FIG. 3 , a yarn unwinding assisting device 22, a lower yarn blowup device 31, an upper yarn catching device 32, a lower yarn catching device 34, a tension applying device 35, and the like are arranged between the yarn supplying section 11 and the yarn accumulating section 13 in this order from bottom to top.
  • the yarn joining device 33 is arranged between the upper yarn catching device 32 and the lower yarn catching device 34, and the yarn clearer 36 is arranged above the tension applying device 35.
  • the yarn unwinding assisting device 22 is arranged above the yarn supplying section 11.
  • the yarn unwinding assisting device 22 includes a regulating member 23.
  • the yarn unwinding assisting device 22 causes the regulating member 23 to contact from above the yarn Y unwound from the yarn supplying bobbin Bk to prevent bulging of the yarn Y by a centrifugal force generated during unwind.
  • the lower yarn blowup device 31 is connected to a compressed air source.
  • the lower yarn blowup device 31 blows up the lower yarn Y1.
  • the upper yarn catching device 32 is connected to a negative pressure source.
  • the upper yarn catching device 32 catches by suction the upper yarn Y2.
  • the lower yarn catching device 34 is connected to a negative pressure source.
  • the lower yarn catching device 34 catches by suction the lower yarn Y1 blown up by the lower yarn blowup device 31.
  • the tension applying device 35 includes, for example, fixed comb teeth and movable comb teeth. The tension applying device 35 applies a predetermined tension to the yarn Y.
  • a tubular yarn guiding member 38 is arranged from the position of the upper yarn catching device 32 to the position of the upper yarn blowdown device 44.
  • An opening on an upper end of the yarn guiding member 38 opposes the upper yarn blowdown device 44 and an opening on a lower end thereof opposes the upper yarn catching device 32.
  • a not-shown slit is formed in a longitudinal direction on a side wall of the yarn guiding member 38.
  • the yarn joining operation explained below is performed by the yarn joining device 33, the yarn accumulating section 13, and the like.
  • the rotation of the drum driving motor 42 of the yarn accumulating section 13 is stopped to stop the rotation of the yarn accumulating drum 41.
  • the lower yarn Y1 generated by cutting of the yarn by the yarn clearer 36 is caught by suction by the lower yarn catching device 34, and the lower yarn Y1 is guided to the yarn joining device 33.
  • the upper yarn blowdown device 44 pulls the upper yarn Y2 that has adhered to the surface of the yarn accumulating drum 41 to blow down toward the yarn guiding member 38.
  • the blown down upper yarn Y2 is guided from the opening on the upper end to the opening on the lower end of the yarn guiding member 38.
  • the upper yarn catching device 32 catching by suction the yarn end of the upper yarn Y2
  • the upper yarn Y2 is taken out of the slit of the yarn guiding member 38 and guided to the yarn joining device 33.
  • the yarn joining device 33 performs the yarn joining of the lower yarn Y1 and the upper yarn Y2 guided thereto.
  • the unit controlling section 15 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.
  • the unit controlling section 15 controls various structural components by using the CPU based on computer programs stored in the ROM. Specifically, the unit controlling section 15 controls reception of a signal from the yarn clearer 36, the drum rotational speed sensor 63, the package rotational speed sensor 61, a later-explained air pressure changing section 71 and the like, and the operation of the yarn unwinding assisting device 22, the yarn joining device 33, the drum driving motor 42, the drum driving motor 62, the air pressure changing section 71, and the like.
  • FIG. 5 is a schematic view for explaining the braking device 53.
  • FIGS. 6A and 6B are cross-sectional views of the braking cylinder 60 and a neighboring configuration thereof.
  • the braking device 53 includes, as shown in FIGS. 4 and 5 , the braking cylinder 60, the air pressure changing section 71 (fluid pressure changing section of the present invention), and the like.
  • the braking cylinder 60 is arranged inside the bobbin holder 56.
  • the braking cylinder 60 includes, as shown in FIGS. 6A and 6B , a housing 72, a bearing sleeve 73, a rotation support member 74, and the like.
  • the housing 72 is attached to a tip end part of the cradle arm 51a.
  • the bearing sleeve 73 is fit in the housing 72 so as to be movable but not rotatable.
  • a braking shoe 75 (resistance generating section of the present invention) is arranged at a tip end part of the bearing sleeve 73.
  • a chamber 76 is formed by an inner wall of the housing 72 and the bearing sleeve 73.
  • the chamber 76 has an opening through which the compressed air can be supplied to the chamber 76.
  • a spring 77 that biases the bearing sleeve 73 toward the holder body 58 is arranged between the housing 72 and the bearing sleeve 73.
  • the rotation support member 74 is arranged inside the bearing sleeve 73.
  • a shaft 78 is attached to the holder body 58.
  • the rotation support member 74 supports the shaft 78 so as to be rotatable.
  • a spring 79 that biases the rotation support member 74 toward the holder body 58 is arranged between the bearing sleeve 73 and the rotation support member 74.
  • the air pressure changing section 71 is for changing the pressure of the compressed air supplied to the chamber 76 of the braking cylinder 60.
  • the air pressure changing section 71 includes a solenoid valve 81, a solenoid valve 82, an air pressure controlling section 83, and the like.
  • the solenoid valves 81 and 82 are normally closed 2-way solenoid valves.
  • An input side of the solenoid valve 81 is connected to a supply port 84 connected to a compressed air source, and an output side is connected to the chamber 76 and to an input side of the solenoid valve 82.
  • the input side of the solenoid valve 82 is connected to the chamber 76 and to the output side of the solenoid valve 81, and an output side is connected to an exhaust port 85 open to the outside.
  • the air pressure controlling section 83 opens and closes the solenoid valve 81 and the solenoid valve 82 independently.
  • the solenoid valve 81 is open and the solenoid valve 82 is closed, the compressed air flows as shown with a continuous-line arrow in FIG. 5 .
  • the compressed air is supplied from the supply port 84 to the chamber 76 whereby the pressure of the compressed air inside the chamber 76 increases.
  • the solenoid valve 81 is closed and the solenoid valve 82 is open, the compressed air flows as shown with a dotted-line arrow in FIG. 5 .
  • the compressed air is discharged from the chamber 76 to the exhaust port 85, and the pressure inside the chamber 76 decreases.
  • both the solenoid valves 81 and 82 are closed, the pressure inside the chamber 76 is maintained at the designated pressure as the compressed air is neither supplied nor discharged.
  • a pressure meter 86 is arranged between the solenoid valve 81 and the chamber 76.
  • the pressure meter 86 measures the pressure of the compressed air supplied to the chamber 76 and outputs a measured value to the air pressure controlling section 83.
  • the air pressure controlling section 83 opens and closes the solenoid valves 81 and 82 based on a detection result obtained in the pressure meter 86 to adjust the pressure of the compressed air to a predetermined value.
  • the predetermined value is output, for example, from the unit controlling section 15.
  • FIG. 6A depicts a state in which no compressed air is supplied to the chamber 76 or when the pressure of the compressed air supplied to the chamber 76 is so low that the braking shoe 75 does not contact the holder body 58.
  • the holder body 58 is not braked so that the holder body 58 can rotate freely with respect to the bearing sleeve 73. Moreover, at this time, the holder body 58 is biased toward the winding bobbin Bm via the shaft 78 by the action of the springs 77 and 79 of the bearing sleeve 73 and the low-pressure compressed air. As a result, the winding bobbin Bm is held so as to be rotatable.
  • this pressure represented by the predetermined value is referred to as an action initiation pressure. Note that the action initiation pressure can change, for example, depending on the shape and the like of the braking shoe 75.
  • a process procedure performed by the unit controlling section 15 when a yarn breakage and the like has occurred is explained below by using FIG. 7 .
  • the unit controlling section 15 has driven the drum driving motor 62 to rotate the traversing drum 52 while the package 100 and the traversing drum 52 are in contact with each other whereby some yarn Y has been wound on the package 100. Moreover, the low-pressure compressed air is being supplied to the chamber 76 of the braking cylinder 60 so that the package 100 is not braked. That is, a circumferential speed of the package 100 and a circumferential speed of the traversing drum 52 are almost equal. Moreover, the unit controlling section 15 is controlling the drum driving motor 42 to rotate the yarn accumulating drum 41 to keep an appropriate amount of the accumulated yarn Y in the yarn accumulating section 13. A yarn winding operation performed under these conditions is referred to as a normal winding operation below. In the normal winding operation, the circumferential speeds of the package 100 and the traversing drum 52 are 1500 m/min, for example.
  • the deceleration process (package deceleration method of the present invention) of the package 100 and the traversing drum 52 to reduce the winding speed of the yarn Y is performed (S102) so that the yarn Y accumulated in the yarn accumulating section 13 does not dry up.
  • the unit controlling section 15 causes the package 100 and the traversing drum 52 to decelerate thereby temporarily reducing the winding speed of the yarn Y so that the yarn Y accumulated in the yarn accumulating section 13 does not dry up.
  • FIG. 8 is a flowchart of the deceleration process.
  • the unit controlling section 15 starts the deceleration of the package 100 (S201).
  • the unit controlling section 15 reads from the ROM and the like a preset value of the pressure of the compressed air supplied to the chamber 76 of the braking cylinder 60, and controls the air pressure changing section 71 of the braking device 53 so as to start increasing the pressure of the compressed air supplied to the chamber 76.
  • the preset pressure when starting the increase of the pressure is equal to the pressure when the package 100 starts deceleration, namely, is equal to the action initiation pressure.
  • the braking shoe 75 of the braking cylinder 60 is pressed against the holder body 58 whereby the package 100 is pushed toward the small diameter side in the rotation axis direction thereof.
  • the winding bobbin Bm and the cradle 51 undergo elastic deformation whereby the winding position of the yarn Y can shift.
  • FIGS. 9A and 9B when the pressure is higher ( FIG. 9B ) than the above-mentioned low pressure ( FIG. 9A ), the winding position of the yarn Y on the package 100 shifts toward the small diameter side and the yarn Y goes beyond the large diameter side of the package 100 leading to the occurrence of the stitching.
  • the unit controlling section 15 performs the following control to prevent this.
  • the unit controlling section 15 increases a rate of increase of the pressure as high as possible. After the pressure has crossed the action initiation pressure, the unit controlling section 15 decreases the rate of increase of the pressure.
  • FIGS. 10A to 10D A temporal variation of the pressure before and after the start of the deceleration of the package 100 and a temporal variation of the circumferential speed of the package 100 are explained by using FIGS. 10A to 10D .
  • FIG. 10A before a time point T1, that is, before the pressure starts increasing, the pressure is maintained at a pressure P1 that is a low pressure. The pressure starts increasing from the time point T1, and the pressure steeply increases from the pressure P1.
  • FIG. 10B the package 100 has not yet started deceleration.
  • the pressure reaches a pressure P2 that is the action initiation pressure ( FIG. 10A )
  • the circumferential speed of the package 100 starts reducing ( FIG. 10B ).
  • this state is referred to as a prioritized package deceleration state.
  • the unit controlling section 15 reads a target circumferential speed of the traversing drum 52 and drives the drum driving motor 62 to start the deceleration of the traversing drum 52 (S202). In this manner, the unit controlling section 15 decelerates the package 100 first and then decelerates the traversing drum 52.
  • the unit controlling section 15 performs a control to maintain the prioritized package deceleration state during the deceleration of the package 100 (S203).
  • the unit controlling section 15 calculates a difference (sliding amount) at the current point in time between the circumferential speed of the package 100 and the circumferential speed of the traversing drum 52.
  • the circumferential speed of the traversing drum 52 is calculated based on the detection result obtained in the drum rotational speed sensor 63 and a diameter of the traversing drum 52 stored beforehand in the ROM and the like.
  • the circumferential speed of the package 100 is controlled based on the detection result obtained in the package rotational speed sensor 61 and the detection result obtained in the drum rotational speed sensor 63.
  • a ratio between the detection result obtained in the package rotational speed sensor 61 and the detection result obtained in the drum rotational speed sensor 63 is calculated. For this ratio, it is assumed that the circumferential speed of the package 100 and the circumferential speed of the traversing drum 52 are equal, and the deceleration control is performed based on this ratio while taking into account the sliding amount.
  • the unit controlling section 15 controls the braking device 53 such that the circumferential speed of the package 100 is maintained at a speed that is slower than the circumferential speed of the traversing drum 52. Specifically, the air pressure changing section 71 is controlled to adjust the pressure of the compressed air supplied to the chamber 76. When the sliding amount decreases, the unit controlling section 15 causes the pressure to be increased to increase the rate of the deceleration of the package 100.
  • a traversing width of the yarn Y on the package 100 that is, a distance for which the yarn Y performs one reciprocation traversing by the rotation of the traversing drum 52, is narrow. Accordingly, the winding position of the yarn Y on the package 100 is shifted to a central portion in the traversing direction, and also a winding width of the yarn Y decreases in comparison with the same in the normal winding operation.
  • the unit controlling section 15 causes the pressure to be reduced to reduce the rate of the deceleration.
  • the unit controlling section 15 maintains the prioritized package deceleration state and controls the braking device 53 such that the sliding amount is within a target range.
  • the target range of the sliding amount is, for example, 50 m/min to 1000 m/min.
  • Another target range of the sliding amount is, for example, 200 m/min to 400 m/min.
  • the unit controlling section 15 determines whether the winding speed of the yarn Y on the package 100 has reached the target value (S204). The unit controlling section 15 maintains the circumferential speed if the circumferential speed of the package 100 has reached the target value, but if the circumferential speed has not reached the target value, the control is returned to Step S203 thereby continuing the deceleration of the package 100 while maintaining the prioritized package deceleration state.
  • the unit controlling section 15 controls the braking device 53 and the drum driving motor 62 so as to stop the package 100 and the traversing drum 52.
  • the unit controlling section 15 performs the yarn joining process.
  • the unit controlling section 15 controls the drum driving motor 42 so as to stop the yarn accumulating drum 41. Thereafter, as mentioned above, the unit controlling section 15 guides the lower yarn Y1 and the upper yarn Y2 to the yarn joining device 33 and controls the yarn joining device 33 to perform the yarn joining. Even while the yarn joining process is being performed, the unit controlling section 15 drives the drum driving motor 62 to rotate the traversing drum 52 and the package 100 whereby the pulling of the yarn Y from the yarn accumulating section 13 and the winding of the yarn Y on the package 100 are continued. However, in this case, the amount of the accumulated yarn Y decreases as the yarn accumulating drum 41 is not rotating.
  • the unit controlling section 15 controls the drum driving motor 42 to rotate the yarn accumulating drum 41 and restarts the accumulation of the yarn Y in the yarn accumulating section 13.
  • the unit controlling section 15 accelerates the yarn accumulating drum 41 to rotate it at a rotational speed that is faster than the same in the normal winding operation (S103).
  • the unit controlling section 15 controls the drum driving motor 62 to accelerate the traversing drum 52 so that the winding speed of the yarn Y is returned to the same in the normal winding operation (S104). On this occasion, the rotational speed of the yarn accumulating drum 41 is also returned to the rotational speed in the normal winding operation.
  • the circumferential speed of the package 100 is made slower than the circumferential speed of the traversing drum 52.
  • the winding width of the yarn Y becomes narrow. Therefore, the occurrence of the stitching when the package is decelerated while the package is being formed can be prevented surely.
  • both the rotation of the package 100 and the traversing of the yarn Y are performed by the traversing drum 52. That is, the package forming section 12 does not include a traversing guide (that can independently adjust the traversing speed of the yarn Y) that is separate from of the traversing drum 52. Therefore, as explained above, the winding width of the yarn Y can be made narrow only by maintaining the prioritized package deceleration state.
  • the air pressure changing section 71 provides control so that the rate of increase of the pressure until the pressure of the compressed air supplied to the chamber 76 reaches the action initiation pressure is higher than the rate of increase of the pressure after the same has crossed the action initiation pressure. Because of this, the pressure of the fluid supplied to the chamber 76 reaches the action initiation pressure in a short time. Accordingly, a mismatch between a timing at which the package 100 is pushed by the braking shoe 75 and a timing at which the winding width of the yarn Y becomes narrow because of the prioritized package deceleration state becomes small. Accordingly, the occurrence of the stitching because of the winding position misalignment of the yarn can be prevented.
  • the traversing drum 52 is decelerated after starting the deceleration of the package 100, the circumferential speed of the package 100 can be surely made slower than the circumferential speed of the traversing drum 52 whereby the occurrence of the stitching can be prevented. Moreover, because not only the package 100 is decelerated by using the braking device 53 but also the traversing drum 52 is decelerated thereafter, an excessive increase of the sliding amount can be avoided.
  • the formation of the package 100 is continued by pulling the yarn Y accumulated in the yarn accumulating section 13 while the yarn joining is performed by the yarn joining device 33.
  • the yarn Y is continuous between the yarn accumulating section 13 and the package 100, in the process of deceleration of the package 100 while taking care that the yarn accumulated in the yarn accumulating section 13 does not dry up, there are chances of occurrence of the stitching because of the winding position misalignment of the yarn Y.
  • the package 100 is decelerated such that the circumferential speed of the package 100 is slower than the circumferential speed of the traversing drum 52, the winding width of the yarn Y becomes narrow whereby the occurrence of the stitching is prevented.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
EP17192340.2A 2016-10-18 2017-09-21 Garnaufwicklungsvorrichtung und paketentschleunigungsverfahren Active EP3312118B1 (de)

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Cited By (1)

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DE102020132294A1 (de) 2020-12-04 2022-06-09 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zur Zustandserfassung einer Spulenbremse sowie Arbeitsstelle einer Textilmaschine

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JP2019218961A (ja) * 2018-06-15 2019-12-26 村田機械株式会社 ソレノイドバルブユニット及び自動ワインダ

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US5595351A (en) * 1993-11-18 1997-01-21 W. Schlafhorst Ag & Co. Method for controlling a winding station of a bobbin winding machine when a take-up bobbin is changed and winding station for performing the method
DE102009004615A1 (de) * 2009-01-15 2010-07-22 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Betreiben einer Spulvorrichtung und Spulvorrichtung einer Auflaufspulen herstellenden Textilmaschine
JP2013253353A (ja) 2012-06-08 2013-12-19 Murata Mach Ltd 紡績機
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US4805844A (en) * 1987-02-07 1989-02-21 W. Schlafhorst & Co. Method and apparatus for monitoring and controlling winding operation of a winding station in a textile winding machine
US5595351A (en) * 1993-11-18 1997-01-21 W. Schlafhorst Ag & Co. Method for controlling a winding station of a bobbin winding machine when a take-up bobbin is changed and winding station for performing the method
DE102009004615A1 (de) * 2009-01-15 2010-07-22 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Betreiben einer Spulvorrichtung und Spulvorrichtung einer Auflaufspulen herstellenden Textilmaschine
JP2013253353A (ja) 2012-06-08 2013-12-19 Murata Mach Ltd 紡績機
EP3009387A1 (de) * 2014-10-17 2016-04-20 Murata Machinery, Ltd. Garnaufwicklungsvorrichtung und paketabbremsverfahren
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EP3312118B1 (de) 2018-10-31

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