EP4357284A1 - Yarn package knot releasing device, yarn joining processing device, and yarn feeding device - Google Patents

Yarn package knot releasing device, yarn joining processing device, and yarn feeding device Download PDF

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Publication number
EP4357284A1
EP4357284A1 EP23203479.3A EP23203479A EP4357284A1 EP 4357284 A1 EP4357284 A1 EP 4357284A1 EP 23203479 A EP23203479 A EP 23203479A EP 4357284 A1 EP4357284 A1 EP 4357284A1
Authority
EP
European Patent Office
Prior art keywords
yarn
winding
package
tension
knot
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.)
Pending
Application number
EP23203479.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Masato Yamamoto
Shigeki Kitagawa
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.)
TMT Machinery Inc
Original Assignee
TMT Machinery Inc
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 TMT Machinery Inc filed Critical TMT Machinery Inc
Publication of EP4357284A1 publication Critical patent/EP4357284A1/en
Pending legal-status Critical Current

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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
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/10—Package-supporting devices for one operative package and one or more reserve packages
    • B65H49/12—Package-supporting devices for one operative package and one or more reserve packages the reserve packages being mounted to permit manual or automatic transfer to operating position
    • 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
    • B65H54/44—Arrangements for rotating packages in which the package, core, or former is engaged with, or secured to, a driven member rotatable about the axis of the package
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/02—Arrangements for removing spent cores or receptacles and replacing by supply packages at paying-out stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • 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

  • An aspect of the present invention relates to a yarn package knot releasing device, a yarn joining processing device, and a yarn feeding device.
  • the yarn may be tied by tying the yarn portion at the end of the winding on the outer peripheral surface of the yarn layer.
  • the yarn is tied by the knot including the slip knot (also called a "knot which is released by pulling")
  • the knot can be easily released by pulling the yarn portion at the end of winding of the yarn.
  • a robot can easily untie the knot instead of an operator.
  • the yarn capturing portion may include only a mechanism that captures the yarn end of the yarn portion at the end of winding by suction or may include a mechanism that sandwiches the yarn end of the yarn portion at the end of winding together with a mechanism that captures the yarn end of the yarn portion at the end of winding by suction.
  • a yarn line handling device described in Japanese Unexamined Patent Publication No. 2021-91987 includes a yarn capturing portion (second capturing mechanism) capable of capturing a yarn (yarn line) by a negative pressure generated when compressed fluid is supplied.
  • the yarn capturing portion becomes a capturing state capable of capturing a yarn in a sandwiched state while compressed fluid is not supplied and becomes a releasing state not sandwiching a yarn from the capturing state when compressed fluid is supplied.
  • the yarn line handling device includes not only a mechanism that captures the yarn end of the yarn portion at the end of winding by suction but also a mechanism that sandwiches the yarn end of the yarn portion at the end of winding.
  • the yarn end of the yarn portion at the end of winding needs to be strongly pulled in a direction moving away from the yarn package in order to release the knot when capturing the yarn end of the yarn portion at the end of winding with respect to the yarn package in which the yarn end of the yarn portion at the end of winding is tied on the outer peripheral surface of the yarn layer of the yarn package by the knot including the slip knot (hereinafter, simply referred to as "knot").
  • the yarn end of the yarn portion at the end of winding needs to be sucked by a negative pressure generated when a large amount of compressed fluid is supplied in order to strongly pull the yarn end of the yarn portion at the end of winding in a direction moving away from the yarn package when releasing the knot in a case in which only the mechanism that captures the yarn end of the yarn portion at the end of winding by suction is provided.
  • the yarn end of the yarn portion at the end of winding can be strongly pulled in a direction moving away from the yarn package by the yarn capturing portion capturing the yarn in a sandwiched state in a case in which not only the mechanism that captures the yarn end of the yarn portion at the end of winding by suction but also the mechanism that sandwiches the yarn end of the yarn portion at the end of winding are provided.
  • the yarn sandwiching mechanism clamp mechanism, chuck mechanism, etc.
  • the yarn sandwiching mechanism for sandwiching the yarn is provided in the yarn capturing portion
  • the size of the yarn capturing portion increase and the yarn capturing portion may not pass through a narrow space. Accordingly, this is unrealistic.
  • the yarn may get entangled in the yarn sandwiching mechanism when strongly pulling the yarn end of the yarn portion at the end of winding in a direction moving away from the yarn package. This point is also unrealistic.
  • an object of an aspect of the present invention is to provide a yarn package knot releasing device, a yarn joining processing device, and a yarn feeding device capable of releasing a knot including a slip knot of a yarn package without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling a yarn to a yarn capturing portion and providing a yarn sandwiching mechanism for sandwiching a yarn in the yarn capturing portion.
  • a yarn package knot releasing device is a yarn package knot releasing device for releasing a knot including a slip knot by moving a yarn end of a yarn portion at the end of winding of a yarn layer formed by winding a yarn on a bobbin with respect to a yarn package in which the yarn portion at the end of winding is tied on an outer peripheral surface of the yarn layer with the knot, including: a yarn capturing portion which captures the yarn end of the yarn portion at the end of winding by suction; a wound portion on which the yarn portion at the end of winding is wound; a yarn capturing portion moving portion which moves the yarn capturing portion; a winding control unit which moves the yarn capturing portion capturing the yarn end by the yarn capturing portion moving portion so that the yarn portion at the end of winding is wound on the wound portion a plurality of times; a first tension generating portion which generates a predetermined first tension at a first portion between the yarn capturing portion and the wound portion in the yarn portion at the end of wind
  • the yarn package knot releasing device since the yarn portion at the end of winding is wound on the wound portion a plurality of times and the second tension larger than the first tension is generated at the second portion in a state in which the first tension is generated at the first portion, the yarn end of the yarn portion at the end of winding can be strongly pulled even at the second tension to release the knot.
  • the yarn package knot releasing device of an aspect of the present invention it is possible to release the knot of the yarn package without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn to the yarn capturing portion and providing a yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion.
  • the knot releasing device when the first tension is T1, the second tension is T2, a friction coefficient of the wound portion is ⁇ , and the number of times of winding the yarn portion at the end of winding with respect to the wound portion is ⁇ , a relationship of a following formula (1) corresponding to a Capstan equation is satisfied.
  • the knot can be released by using the relationship of the following formula (1) corresponding to the Capstan equation.
  • the second tension generating portion may move the winding point of the yarn portion at the end of winding in the wound portion from a first position to a second position in a direction moving away from the yarn package and the first tension generating portion may move the yarn capturing portion in synchronization with the movement of the winding point.
  • the second tension can be generated by moving the winding point from the first position to the second position in a direction moving away from the yarn package.
  • the first tension can be generated and maintained by moving the yarn capturing portion in synchronization with the movement of the winding point.
  • the wound portion may be a rod-shaped member that is swingable with a base end side swing axis as a base axis
  • the first tension generating portion and the second tension generating portion may include a guide portion which swings the rod-shaped member and guides the winding point from the first position to the second position
  • the yarn capturing portion may be brought into contact with the rod-shaped member on which the yarn portion at the end of winding is wound so that the yarn capturing portion is moved by the yarn capturing portion moving portion
  • the rod-shaped member may be swung while being guided by the guide portion so that the winding point moves from the first position to the second position.
  • the knot can be released by swinging the rod-shaped member on which the yarn portion at the end of winding is wound.
  • the first position may be a position in a range in which the distance from the knot is equal to or shorter than a length from the knot to an end of the yarn portion at the end of winding. In this case, the yarn portion at the end of winding can be reliably wound on the wound portion.
  • the second position may be a position in a range between one end and the other end of the yarn package in the width direction of the yarn package. In this case, it is possible to suppress the yarn portion at the end of winding wound on the bobbin from being moved in the width direction of the yarn package until the yarn portion is separated from the bobbin when the winding point is moved toward the second position.
  • the second tension generating portion may include a yarn package moving portion which moves the yarn package to be away from the wound portion in a state in which the positions of the wound portion and the yarn capturing portion are fixed.
  • the second tension can be generated by the yarn package moving portion.
  • the wound portion may be a rod-shaped member that extends along an axis
  • the second tension generating portion may include a rod-shaped member rotating portion which rotates the rod-shaped member in a rotation direction in which the yarn portion at the end of winding is pulled out from the yarn package with the axis as a base axis in a state in which the positions of the rod-shaped member and the yarn capturing portion are fixed.
  • the second tension can be generated by the rod-shaped member rotating portion.
  • the second tension generating portion may include a tension portion which pulls the second portion of the yarn portion at the end of winding in a state in which the positions of the wound portion and the yarn capturing portion are fixed.
  • the second tension can be generated by the tension portion.
  • the yarn package knot releasing device may include a hook member that hooks the second portion of the yarn portion at the end of winding. In this case, it is possible to change the direction of the yarn path so that the knot is easily released by using the hook member.
  • the yarn package may include a first yarn package and a second yarn package
  • the wound portion may include a first wound portion on which the yarn portion at the end of winding of the first yarn package is wound and a second wound portion on which the yarn portion at the end of winding of the second yarn package is wound
  • the first tension generating portion may include a first tension generating portion for the first yarn package generating the first tension at the first portion of the first yarn package and a first tension generating portion for the second yarn package generating the first tension at the first portion of the second yarn package
  • the second tension generating portion may include a second tension generating portion for the first yarn package generating the second tension at the second portion of the first yarn package and a second tension generating portion for the second yarn package generating the second tension at the second portion of the second yarn package.
  • the yarn joining processing device includes the yarn package knot releasing device and a yarn joining portion which connects an outer layer side yarn end of the first yarn package and an inner layer side yarn end of the second yarn package or connects an inner layer side yarn end of the first yarn package and an outer layer side yarn end of the second yarn package. Since this yarn joining processing device includes the knot releasing device, it is possible to release the knot of the yarn package without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn to the yarn capturing portion and providing a yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion as described above.
  • a yarn feeding device includes: the yarn package knot releasing device; a yarn feeding stand which includes a first mounting portion for mounting the first yarn package thereon and a second mounting portion for mounting the second yarn package thereon; and a yarn joining portion which connects an outer layer side yarn end of the first yarn package and an inner layer side yarn end of the second yarn package or connects an inner layer side yarn end of the first yarn package and an outer layer side yarn end of the second yarn package. Since this yarn feeding device includes the knot releasing device, it is possible to release the knot of the yarn package without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn to the yarn capturing portion and providing a yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion as described above.
  • the yarn package knot releasing device, the yarn joining processing device, and the yarn feeding device capable of releasing the knot including the slip knot of the yarn package without supplying a large amount of compressed fluid causing the negative pressure for strongly pulling the yarn to the yarn capturing portion and providing the yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion.
  • a yarn feeding device 100 includes a creel stand (yarn feeding stand) 20 and a yarn joining processing device 9A.
  • the creel stand 20 is provided in a false twisting machine 1.
  • the yarn joining processing device 9A is mounted on a package exchange device 9.
  • the "Z direction” shown in the figure is the vertical direction (the up and down direction)
  • the "X direction” is the horizontal direction
  • the "Y direction” is the horizontal direction orthogonal to the "X direction”.
  • the false twisting machine 1 processes yarns (synthetic yarns) fed from a plurality of yarn feeding packages to manufacture winding packages.
  • the yarn is, for example, a synthetic fiber yarn made of thermoplastic synthetic fibers such as polyester and polyamide.
  • the yarn feeding package is formed by winding a partially oriented yarn (POY) on a yarn feeding bobbin.
  • POY partially oriented yarn
  • the winding package is formed by winding a drawn textured yarn (DTY) on a winding bobbin. That is, the false twisting machine 1 processes the yarn Y, which is a semi-drawn yarn, to manufacture a drawn textured yarn.
  • an adapter 8 is attached to a yarn feeding package P1.
  • the adapter 8 is attached to an end portion of a yarn feeding bobbin B1 of the yarn feeding package P1 to be synchronously rotatable.
  • the adapter 8 is formed in a cylindrical shape.
  • the adapter 8 is provided with a holding hole portion 81 which holds a yarn end of the yarn Y on the outer layer side (lead yarn side) of the yarn feeding package P1 (hereinafter, the yarn end of the yarn Y on the outer layer side is referred to as a "first yarn end Y1" while the yarn end enters the holding hole portion.
  • the first yarn end Y1 is an end (yarn end) of a yarn portion at the end of winding of a yarn layer YL formed by winding the yarn Y around the yarn feeding bobbin B1.
  • the holding hole portion 81 is formed by a narrow tubular pipe provided inside the adapter 8 and extending in a bent manner.
  • the holding hole portion 81 opens in the axial direction of the adapter 8.
  • An opening portion of the holding hole portion 81 is provided with a suction port that abuts on a suction mouth 712 to be described later.
  • the suction port is a recess that tapers toward the center.
  • the adapter 8 is mounted on the yarn feeding package P1 by, for example, an operator.
  • a yarn portion at the end of winding of the yarn layer YL in the yarn feeding package P1 is tied on the outer peripheral surface of the yarn layer YL with a knot KN including a slip knot.
  • the yarn portion at the end of winding of the yarn layer YL in the yarn feeding package P1 is tied with the knot KN not to be released.
  • the slip knot is also called a knot which is released by pulling.
  • Such a knot KN fixes the yarn portion at the end of winding of the yarn layer YL onto the outer peripheral surface of the yarn layer YL and is untied by pulling the first yarn end Y1 to release the fixation.
  • the method of forming the knot KN is not particularly limited, and various known methods can be used.
  • the false twisting machine 1 includes a yarn feeding portion 2 and a processing portion 3.
  • a plurality of configurations of the yarn feeding portion 2 and the processing portion 3 are arranged in the Y direction (the longitudinal direction of the base) orthogonal to the traveling surface (the paper surface of FIG. 1 ) of the yarn Y in which the yarn path extends from the yarn feeding portion 2 to the processing portion 3.
  • the yarn feeding portion 2 feeds the yarn Y to the processing portion 3.
  • the yarn feeding portion 2 includes a creel stand 20 which holds a plurality of the yarn feeding packages P1.
  • the creel stand 20 includes a creel base portion 21, a first support column 22, a second support column 23, a partition dish plate 24, and a peg 25.
  • the creel base portion 21 is installed on a floor surface or the like and supports the first support column 22 and the second support column 23.
  • the first support column 22 and the second support column 23 are erected on the creel base portion 21.
  • the first support column 22 extends along the Z direction.
  • the first support columns 22 are arranged at equal intervals in the Y direction.
  • the first support column 22 is disposed at one side C1 of the creel stand 20 in the X direction.
  • One side C1 of the X direction is a side in which the processing portion 3 to be described later in detail in the rear stage is disposed and a side in which the yarn Y is sent to the processing portion 3 for performing false twisting.
  • the second support column 23 extends along the Z direction.
  • the second support columns 23 are arranged in pairs in the Y direction and a plurality of pairs of second support columns 23 and 23 are arranged in the Y direction.
  • the second support column 23 is disposed at the other side C2 of the creel stand 20 in the X direction.
  • the other side C2 of the X direction is a side in which the package exchange device 9 to be described later in detail in the rear stage travels and a side in which the operator performs a yarn joining processing work.
  • a group of the first support columns 22 including the plurality of first support columns 22 and a group of the second support columns 23 including the plurality of second support columns 23 are arranged in the X direction to face each other.
  • the partition dish plate 24 is provided to straddle the first support column 22 and the second support column 23.
  • the partition dish plate 24 is a dish plate-shaped member and is arranged at a predetermined interval in the Z direction.
  • the partition dish plate 24 prevents the yarn feeding package P1 from falling from the peg 25.
  • the peg 25 supports the yarn feeding package P1.
  • the peg 25 is provided in the second support column 23.
  • a plurality of (for example, four) pegs 25 are arranged at predetermined intervals in the Z direction of the second support column 23.
  • the peg 25 is disposed between two partition dish plates 24 in the Z direction. Further, the pegs 25 are arranged in pairs corresponding to the second support columns 23 and 23 arranged in pairs and a plurality of sets (pairs) of the pegs 25 and 25 are arranged in the Y direction.
  • the yarn Y of the yarn feeding package P1 supported by one peg 25 of the pair of pegs can be connected to the yarn Y of the yarn feeding package P1 supported by the other peg 25 of the pair of pegs.
  • the first yarn end Y1 of the yarn feeding package P1 supported by one peg 25 of the pair of pegs can be connected to the yarn end of the yarn Y on the inner layer side (tail yarn side) of the yarn feeding package P1 supported by the other peg 25 of the pair of pegs (hereinafter, the yarn end of the yarn Y on the inner layer side is referred to as a "second yarn end") or the second yarn end of the yarn feeding package P1 supported by one peg 25 of the pair of pegs can be connected to the first yarn end Y1 of the yarn feeding package P1 supported by the other peg 25 of the pair of pegs. Accordingly, one yarn Y is fed (the yarn Y is continuously fed) from two yarn feeding packages P1 and P1 respectively supported by
  • the processing portion 3 performs false twisting on the yarn Y fed from the plurality of yarn feeding packages P1 and winds the processed yarn on the winding bobbin to form a winding package.
  • the package exchange device 9 collects the yarn feeding bobbin B1 from the peg 25 and attaches the yarn feeding package P1 to the peg 25. As shown in FIGS. 4 and 6 , the package exchange device 9 includes a traveling unit 90, an elevating unit 91, a holding unit 92, and an exchange unit 93.
  • the traveling unit 90 is configured to travel along a rail 98 extending in the Y direction.
  • the traveling unit 90 supports the holding unit 92 and the exchange unit 93.
  • the elevating unit 91 is elevated while the operator gets thereon.
  • the holding unit 92 holds the plurality of yarn feeding packages P1.
  • the holding unit 92 receives the yarn feeding package P1 from a package replenishing device (not shown), temporarily stores the yarn feeding package P1, and feeds the yarn feeding package P1 to the exchange unit 93.
  • the exchange unit 93 collects the yarn feeding bobbin B1 from the peg 25 and attaches the yarn feeding package P1 to the peg 25.
  • the exchange unit 93 includes a rotation device 932, a collection device 933, a supply device 934, and a rotary table 936.
  • the rotation device 932 changes the direction of the peg 25 by rotating the peg 25 when attaching the yarn feeding package P1 to the peg 25.
  • the collection device 933 collects the yarn feeding bobbin B1 from the peg 25.
  • the supply device 934 supplies the yarn feeding package P1 to the peg 25.
  • the yarn joining processing device 9A performs a process of releasing the knot KN of the yarn feeding package P1 (hereinafter, also referred to as a "knot releasing process”) and performs a process of connecting the yarn ends of the pair of yarn feeding packages P1 and P1 mounted on the pair of pegs 25 and 25 (hereinafter, also referred to as a "yarn joining process").
  • the yarn joining processing device 9A includes a yarn joining device (yarn joining portion) 60 and a knot releasing device (yarn package knot releasing device) 70.
  • the yarn joining device 60 performs yarn joining processing on the first yarn end Y1 of the yarn feeding package P1 supported by one peg 25 and the second yarn end of the yarn feeding package P1 supported by the other peg 25 or yarn joining processing on the second yarn end of the yarn feeding package P1 supported by one peg 25 and the first yarn end Y1 of the yarn feeding package P1 supported by the other peg 25.
  • the yarn feeding package P1 supported (attached) by one peg 25 is referred to as a first yarn feeding package (first yarn package) P11 and the yarn feeding package P1 supported (attached) by the other peg 25 is referred to as a second yarn feeding package (second yarn package) P12.
  • the peg 25 on which the first yarn feeding package P11 is mounted constitutes a first mounting portion and the peg 25 on which the second yarn feeding package P12 is mounted constitutes a second mounting portion.
  • the yarn joining device 60 constitutes the yarn joining portion which connects the first yarn end Y1 of the first yarn feeding package P11 to the second yarn end of the second yarn feeding package P12 or connects the second yarn end of the first yarn feeding package P11 to the first yarn end Y1 of the second yarn feeding package P12.
  • the knot releasing device 70 is a device which releases the knot KN of the yarn feeding package P1 by moving the first yarn end Y1 which is the yarn end of the yarn portion at the end of winding.
  • the knot releasing device 70 includes a suction gun (yarn capturing portion) 71, a winding rod (wound portion) 72, a rotary cylinder (guide portion) 73, a threading robot (yarn capturing portion moving portion) 74, and a control unit 94.
  • the suction gun 71 captures the first yarn end Y1 which is an end of the yarn portion at the end of winding by suction (hereinafter, also simply referred to as "capturing by suction").
  • the suction gun 71 is provided at the tip of the threading robot 74.
  • the suction gun 71 includes a suction gun 711 and the suction mouth 712.
  • a suction hose 713 leading to a negative pressure source is connected to the suction gun 711, so that a suction flow is generated in the suction gun 71.
  • the base end side of the suction gun 711 is connected to the threading robot 74.
  • the suction mouth 712 is provided at the tip of the suction gun 711.
  • the suction mouth 712 sucks the yarn Y.
  • the suction mouth 712 has a hemispherical surface on the tip side.
  • the suction mouth 712 is connected to the suction gun 711 through a shaft portion and is elastically moved by a spring or the like with respect to the suction gun 711 in the axial direction.
  • the suction gun 71 is connected to the control unit 94 (see FIG. 6 ) and the capturing by suction is performed and stopped by the control unit 94.
  • the winding rod 72 is a member on which the yarn portion at the end of winding of the yarn Y is wound.
  • the winding rod 72 is a rod-shaped member that extends along the axis .
  • the winding rod 72 has a circular tubular shape.
  • the winding rod 72 is formed of, for example, metal.
  • the winding rod 72 is configured to be swingable around a rotation shaft 72X on the base end side as a base axis.
  • the rotation shaft 72X is orthogonal to the axis of the winding rod 72.
  • the rotation shaft 72X extends along the width direction of the yarn feeding package P1 while the end surface of the adapter 8 faces the suction gun 71.
  • Such a winding rod 72 is swingable in a direction in which a tip side moves away from the yarn feeding package P1 while a base end side is a support end.
  • the winding rod 72 includes a first winding rod (first wound portion) 72A on which the yarn portion at the end of winding of the first yarn feeding package P11 is wound and a second winding rod (second wound portion) 72B on which the yarn portion at the end of winding of the second yarn feeding package P12 is wound.
  • the first winding rod 72A is disposed at one end side of the exchange unit 93 in the Y direction and the second winding rod 72B is disposed at the other end side of the exchange unit 93 in the Y direction.
  • a rotary cylinder 73 swings the winding rod 72 to guide a winding point Q in which the yarn portion at the end of winding of the yarn Y is wound in the winding rod 72 (hereinafter, also referred to as a "winding point Q") from a first position to a second position in a direction moving away from the yarn feeding package P1.
  • the rotary cylinder 73 includes an air cylinder 73X, a rack gear 73Y provided at a tip side of a piston rod 731 of the air cylinder 73X, and a pinion gear 73Z meshing with the rack gear 73Y.
  • the air cylinder 73X includes a throttle (not shown) that throttles the exhaust of air.
  • the air cylinder 73X is connected to the control unit 94 and the supply of air to the air cylinder 73X is controlled by the control unit 94.
  • the throttle of the air cylinder 73X can be realized, for example, by providing a throttle valve on the exhaust side.
  • the pinion gear 73Z is provided to be rotatable around the rotation shaft 72X. The base end of the winding rod 72 is fixed to the pinion gear 73Z for synchronous rotation.
  • the winding rod 72 is tilted so that the tip side moves toward the yarn feeding package P1 and the winding point Q of the winding rod 72 is located at the first position (see FIG. 9(a) ).
  • the winding rod 72 is tilted so that the tip side moves away from the yarn feeding package P1 and the winding point Q of the winding rod 72 is located at the second position (see FIG. 9(b) ).
  • the first position is a position in a range in which the distance from the knot KN is equal to or shorter than the length from the knot KN to the first yarn end Y1.
  • the first position is a position of the winding point Q when the piston rod 731 of the air cylinder 73X is in the most advanced state.
  • the second position is a position farther from the yarn feeding package P1 than the first position.
  • the second position is separated from the first position by, for example, 100 mm or more.
  • the second position is a position of the winding point Q when the piston rod 731 of the air cylinder 73X is in the most retracted state.
  • the second position is a position in a range H (see FIG. 7 ) between one end and the other end of the yarn feeding package P1 in the width direction of the yarn feeding package P1 in a state in which the peg 25 is operated so that the end surface of the adapter 8 faces the suction gun 71.
  • the rotary cylinder 73 includes a first rotary cylinder 73A which guides the winding point Q of the first winding rod 72A from the first position to the second position in a direction moving away from the first yarn feeding package P11 and a second rotary cylinder 73B which guides the winding point Q of the second winding rod 72B from the first position to the second position in a direction moving away from the second yarn feeding package P12.
  • the first rotary cylinder 73A and the second rotary cylinder 73B are supported by a frame 93F of the exchange unit 93 through the bracket BR1.
  • the first rotary cylinder 73A is disposed at one end side of the exchange unit 93 in the Y direction and the second rotary cylinder 73B is disposed at the other end side of the exchange unit 93 in the Y direction.
  • the rotary cylinder 73 may be of a double-acting type in which the piston rod 731 advances and retreats with air or a single-acting type in which either one of the piston rod 731 advances or retreats with air (either one of advancing and retreating is realized by a spring or the like).
  • the threading robot 74 moves the suction gun 71.
  • the threading robot 74 is connected to the base end side of the suction gun 71.
  • the threading robot 74 includes a link mechanism and a plurality of motors.
  • the threading robot 74 is supported by the frame 93F of the exchange unit 93 through a bracket BR2.
  • the threading robot 74 is disposed at the center portion of the exchange unit 93 in the Y direction.
  • the threading robot 74 is located between the first winding rod 72A and the second winding rod 72B in the Y direction.
  • the threading robot 74 is not particularly limited, and various known robot arms can be used.
  • the threading robot 74 is connected to the control unit 94 and the movement of the suction gun 71 is controlled by the control unit 94.
  • the control unit 94 an electronic control unit including a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an I/O port, a communication port, and the like.
  • CPU central processing unit
  • ROM read only memory
  • RAM random access memory
  • I/O port an I/O port
  • communication port a communication port
  • Each function in the control unit 94 is executed under the control of the CPU by loading predetermined computer software on the hardware such as the CPU and the main storage unit.
  • the control unit 94 performs the knot releasing process by controlling at least the suction gun 71, a rotary cylinder 73, and the threading robot 74.
  • the control unit 94 performs the yarn joining process by controlling at least the suction gun 71, the threading robot 74, and the yarn joining device 60.
  • the control unit 94 allows the threading robot 74 to move the suction gun 71 capturing the first yarn end Y1 by suction so that the yarn portion at the end of winding of the yarn Y is wound on the winding rod 72 a plurality of times in the knot releasing process.
  • the control unit 94 maintains the suction of the suction gun 71 with respect to the first yarn end Y1 in the knot releasing process.
  • the suction amount of the suction gun 71 in the knot releasing process may remain constant without change or may change within a set allowable range.
  • the control unit 94 moves the suction gun 71 in a direction moving away from the yarn feeding package P1 in synchronization with the movement of the winding point Q from the first position to the second position in a direction moving away from the yarn feeding package P1 in the knot releasing process.
  • the control unit 94 swings the winding rod 72 while guiding the winding rod by the rotary cylinder 73 so that the winding point Q moves from the first position to the second position by moving the suction gun 71 using the threading robot 74 in such a manner that the suction gun 71 is brought into contact with the winding rod 72 on which the yarn portion at the end of winding of the yarn Y is wound in the knot releasing process.
  • a predetermined first tension is generated at a first portion YQ1 between the suction gun 71 and the winding rod 72 in the yarn portion at the end of winding of the yarn Y.
  • a second tension which is larger than the first tension is generated at a second portion YQ2 between the yarn layer YL and the winding rod 72 in the yarn portion at the end of winding of the yarn Y in a state in which the first tension is generated.
  • the friction coefficient of the winding rod 72 is ⁇
  • the number of times of winding of the yarn portion at the end of winding of the yarn Y with respect to the winding rod 72 is ⁇
  • the relationship of the following formula (1) corresponding to the Capstan equation is satisfied.
  • the first yarn feeding package P11 is a newly introduced package and the second yarn feeding package P12 is a package which is currently being unwound.
  • the peg 25 is not operated by the peg rotation device of the yarn joining device 60 and the first yarn feeding package P11 does not rotate yet.
  • the piston rod 731 of the first rotary cylinder 73A in which the end surface of the adapter 8 faces the side opposite to the suction gun 71 is advanced and the winding rod 72 is held in a state in which its tip side is tilted away from the yarn feeding package P1.
  • the peg 25 is first operated to rotate the first yarn feeding package P11 so that the end surface of the adapter 8 faces the suction gun 71.
  • the control unit 94 controls the threading robot 74 so that the suction mouth 712 of the suction gun 71 is moved and the suction mouth 712 is brought into contact with the suction port of the holding hole portion 81 holding the first yarn end Y1 in the adapter 8.
  • the control unit 94 starts the suction by the suction gun 71 and captures the first yarn end Y1 by suction in the suction mouth 712.
  • the control unit 94 controls the threading robot 74 so that the suction gun 71 capturing the first yarn end Y1 by suction is moved and the suction gun 71 capturing the first yarn end Y1 by suction is moved by the threading robot 74 so that the yarn portion at the end of winding of the yarn Y is wound on the tip portion of the first winding rod 72A three times.
  • the control unit 94 controls the threading robot 74 so that a suction mouth 712 of the suction gun 71 capturing the first yarn end Y1 by suction is turned around the tip portion of the first winding rod 72A about three times.
  • a winding point Q is formed on the tip side of the first winding rod 72A by winding the yarn portion at the end of winding of the yarn Y three times and the position of the winding point Q at this time is a first position.
  • the yarn Y is wound from the base end side to the tip side when winding the yarn Y on the winding rod 72.
  • the yarn portion at the end of winding of the yarn Y is wound on the outer peripheral surface of the first winding rod 72A three times, but the yarn portions of each circumference may partially or wholly overlap each other, may be close to or in contact with each other, or may be separated from each other.
  • the throttle of the air cylinder 73X acts as a resistance and prevents air from being exhausted from the air cylinder 73X. Accordingly, an urging force is generated to hold the tilting of the first winding rod 72A and the winding point Q is held at the first position.
  • the urging force may be realized by using, for example, the elastic force of a spring and the magnetic force of a magnet.
  • the control unit 94 moves (raises) the suction mouth 712 in a direction moving away from the first yarn feeding package P11 by the threading robot 74 while the suction mouth 712 of the suction gun 71 is brought into contact with (hooked to) the first yarn feeding package P11 of the winding point Q in the winding rod 72. At this time, the suction mouth 712 is pressed away from the first yarn feeding package P11 to resist the urging force that holds the inclination of the first winding rod 72A.
  • the first winding rod 72A is tilted so that the tip side of the first winding rod 72A moves away from the yarn feeding package P1, the pinion gear 73Z rotates in one direction, and the piston rod 731 advances.
  • the winding rod 72 swings while being guided by the first rotary cylinder 73A so that the winding point Q moves from the first position to the second position.
  • the first tension T1 is generated at the first portion YQ1 between the suction gun 71 and the first winding rod 72A in the yarn portion at the end of winding and the second tension T2 is generated at the second portion YQ2 between the yarn layer YL and the first winding rod 72A in the yarn portion at the end of winding to satisfy the relationship of the above formula (1) corresponding to the Capstan equation. That is, the yarn portion at the end of winding of the yarn Y can be strongly pulled in a direction moving away from the first yarn feeding package P11. As described above, the knot KN including the slip knot of the first yarn feeding package P11 is released.
  • control unit 94 controls the threading robot 74 so that the suction mouth 712 capturing the first yarn end Y1 by suction is moved to the yarn joining device 60, the suction by the suction mouth 712 is stopped to release the capturing by suction, and the first yarn end Y1 is set (guided) to the yarn joining device 60. Further, the control unit 94 controls the suction gun 71 and the threading robot 74 so that the second yarn end of the second yarn feeding package P12 is captured by the suction mouth 712 by suction, the suction mouth 712 is moved to the yarn joining device 60, the suction by the suction mouth 712 is stopped to release the capturing by suction, and the second yarn end of the second yarn feeding package P12 is set to the yarn joining device 60. Then, the control unit 94 controls the yarn joining device 60 so that the first yarn end Y1 of the first yarn feeding package P11 is joined (connected) to the second yarn end of the second yarn feeding package P12.
  • the same process as the above-described process is performed even in a case of releasing the knot KN provided on the outer peripheral surface of the yarn layer YL of the second yarn feeding package P12 when joining the first yarn end Y1 of the second yarn feeding package P12 which is newly introduced and the second yarn end of the first yarn feeding package P11 which is currently being unwound.
  • the knot releasing device 70 since the yarn portion at the end of winding is wound on the winding rod 72 a plurality of times and the second tension T2 larger than the first tension T1 is generated at the second portion YQ2 in a state in which the first tension T1 is generated at the first portion YQ1, the first yarn end Y1 can be strongly pulled even at the second tension T2 to release the knot KN.
  • the knot releasing device 70 it is possible to release the knot KN including the slip knot of the yarn feeding package P1 without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn Y to the suction gun 71 and providing a yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun 71.
  • knot releasing device 70 for example, ten times larger tension can be generated in the yarn portion at the end of winding compared to a case in which the suction gun 71 capturing the first yarn end Y1 by suction is pulled. Further, in the knot releasing device 70, for example, ten times larger tension can be generated in the yarn portion at the end of winding compared to a case in which the yarn portion at the end of winding is simply wound on the winding rod 72 and the winding rod 72 is raised.
  • the knot releasing device 70 the first tension T1, the second tension T2, the friction coefficient ⁇ of the winding rod 72, and the number ⁇ of times of winding of the yarn portion at the end of winding with respect to the winding rod 72 satisfy the above formula (1) corresponding to the Capstan equation. Accordingly, the knot KN can be released by using the relationship of the above formula (1) corresponding to the Capstan equation.
  • the winding point Q of the yarn portion at the end of winding in the winding rod 72 is moved from the first position to the second position in a direction moving away from the yarn feeding package P1 and the suction gun 71 is moved in synchronization with the movement of the winding point Q.
  • the second tension T2 can be generated.
  • the first tension T1 can be generated and maintained.
  • the knot releasing device 70 includes the rotary cylinder 73 which swings the winding rod 72 to guide the winding point Q from the first position to the second position.
  • the suction gun 71 is brought into contact with the winding rod 72 on which the yarn portion at the end of winding is wound and the suction gun 71 is moved by the threading robot 74, the winding rod 72 is swung while being guided by the rotary cylinder 73 so that the winding point Q moves from the first position to the second position.
  • the knot KN can be released by swinging the winding rod 72 on which the yarn portion at the end of winding is wound.
  • the operation amount of the suction gun 71 can be reduced by swinging the winding rod 72.
  • the degree of freedom in the arrangement of the configurations of the knot releasing device 70 can be increased.
  • the first position is a position in a range in which the distance from the knot KN is equal to or shorter than the length from the knot KN to the first yarn end Y1. In this case, the yarn portion at the end of winding can be reliably wound on the winding rod 72.
  • the second position is a position in the range H between one end and the other end of the yarn feeding package P1 in the width direction of the yarn feeding package P1. In this case, it is possible to suppress the yarn feeding package P1 from being moved in the width direction until the yarn portion at the end of winding wound on the yarn feeding bobbin B1 is separated from the yarn feeding bobbin B1 when the winding point Q is moved toward the second position.
  • the yarn feeding package P1 includes the first yarn feeding package P11 and the second yarn feeding package P12 and the winding rod 72 includes the first winding rod 72A and the second winding rod 72B.
  • the control unit 94 and the first rotary cylinder 73A generate the first tension T1 at the first portion YQ1 of the first yarn feeding package P11 and generate the second tension T2 at the second portion YQ2 of the first yarn feeding package P11.
  • the control unit 94 and the second rotary cylinder 73B generate the first tension T1 at the first portion YQ1 of the second yarn feeding package P12 and generate the second tension T2 at the second portion YQ2 of the second yarn feeding package P12. According to such a configuration, it is possible to cope with the releasing of the knot KN corresponding to each of two yarn feeding packages P11 and P12.
  • the suction gun 71 is provided at the tip of the threading robot 74. Accordingly, the threading robot 74 can easily operate the suction gun 71.
  • the yarn Y is wound from the base end side to the tip side when the yarn Y is wound on the tip side of the winding rod 72. Accordingly, it is possible to suppress the overlapping of the yarn Y at the winding point Q compared to a case in which the yarn Y is wound from the tip side to the base end side.
  • the yarn joining processing device 9A and the yarn feeding device 100 include the knot releasing device 70, it is possible to release the knot KN including the slip knot of the yarn feeding package P1 without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn Y to the suction gun 71 and providing a yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun 71 as described above.
  • the knot releasing device 70 of this embodiment may include a hook member 78 that hooks the second portion YQ2 between the yarn layer YL and the first winding rod 72A in the yarn portion at the end of winding.
  • the direction of the yarn path can be changed so that the knot KN is easily released by using the hook member 78.
  • the hook member 78 is disposed at one side in a direction orthogonal to the axis of the yarn feeding package P1 in plan view.
  • the hook member 78 is fixed to, for example, a frame 93F (see FIG. 7 ) of the exchange unit 93.
  • the hook member 78 is a member having an inverted J shape.
  • the shape of the hook member 78 is not particularly limited and may be various shapes.
  • the hook member 78 may hook the second portion YQ2 in a range F1 separated by an auxiliary line extending in a direction inclined by 45° to one side with respect to the axial direction of the yarn feeding package P1 from intersections Pn between a knot reference line F0 extending in the width direction through the knot KN and both edges in the width direction of the yarn feeding package P1 in plan view.
  • the hook member 78 may hook the second portion YQ2 in the range H of the width direction of the yarn feeding package P1 in plan view.
  • the hook member 78 may hook the second portion YQ2 in a range F3 separated by an auxiliary line extending in the horizontal direction from the intersection Pm with the surface of the yarn feeding package P1 of the knot reference line F2 and the knot reference line F2 extending a vertical direction through the knot KN in side view. Additionally, the hook member 78 may hook the second portion YQ2 in a range F4 separated by an auxiliary line extending in a direction inclined by 45° to the upper side with respect to the horizontal direction and an auxiliary line extending in the horizontal direction. The hook member 78 may be disposed in a range of about 300 mm from the knot reference line F2 in the horizontal direction.
  • the knot releasing device 70 of this embodiment includes the rotary cylinder 73 as the guide portion which guides the winding point Q by swinging the winding rod 72, but the guide portion is not particularly limited.
  • the guide portion may be a device including a linear motion rail or the like or may be a standard cylinder 173 shown in FIG. 14 .
  • the standard cylinder 173 includes an air cylinder 173X, a connection portion 173Y which is provided at the tip side of the piston rod 731 of the air cylinder 173X, and a support portion 173Z which supports the base end side of the winding rod 72.
  • the connection portion 173Y is slidably connected to the winding rod 72.
  • the support portion 173Z allows the winding rod 72 to be swingable so that the tip side of the winding rod 72 moves in a direction moving close to and away from the yarn feeding package P1.
  • At least the control unit 94 constitutes the winding control unit. At least the control unit 94, the suction gun 71, and the winding rod 72 constitute the first tension generating portion. At least the control unit 94, the suction gun 71, and the first winding rod 72A constitute the first tension generating portion for the first yarn package. At least the control unit 94, the suction gun 71, and the second winding rod 72B constitute the first tension generating portion for the second yarn package. At least the control unit 94, the rotary cylinder 73, the suction gun 71, the winding rod 72, and the threading robot 74 constitute the second tension generating portion.
  • At least the control unit 94, the first rotary cylinder 73A, the suction gun 71, the first winding rod 72A, and the threading robot 74 constitute the second tension generating portion for the first yarn package.
  • At least the control unit 94, the second rotary cylinder 73B, the suction gun 71, the second winding rod 72B, and the threading robot 74 constitute the second tension generating portion for the second yarn package.
  • the control unit 94 is included in the first tension generating portion as an exception, but in other cases, the control unit 94 is not included in the first tension generating portion in principle.
  • a second embodiment will be described. In the description of the second embodiment, the different from the first embodiment will be described.
  • a knot releasing device 270 of this embodiment is different from that of the first embodiment in that a package moving device (yarn package moving portion) 273 is provided instead of the rotary cylinder 73 (see FIG. 6 ).
  • the package moving device 273 horizontally moves the yarn feeding package P1 to move away from the winding rod 72 in a state in which the positions of the winding rod 72 and the suction gun 71 are fixed.
  • the package moving device 273 is not particularly limited and various known devices can be used.
  • the package moving device 273 constitutes the second tension generating portion.
  • the package moving device 273 may include an air cylinder and the like capable of separating the yarn feeding package P1 from the winding rod 72.
  • the package moving device 273 is connected to the control unit 94 and the operation of the package moving device 273 is controlled by the control unit 94.
  • the winding rod 72 of this embodiment is fixed to, for example, the frame 93F (see FIG. 7 ) of the exchange unit 93.
  • FIG. 16(a) is a plan view illustrating a process using the knot releasing device 270.
  • FIG. 16(b) is a side view illustrating a process using the knot releasing device 270.
  • FIG. 17(a) is a plan view showing a continuation of FIG. 16 (a) .
  • FIG. 17 (b) is a side view showing a continuation of FIG. 16(b) .
  • FIGS. 16 and 17 for convenience of description, a description will be made on the assumption that the axial direction of the yarn feeding package P1 is the Y direction and the axial direction of the winding rod 72 is the Z direction (the same applies to FIGS. 19 , 20 , 22 , and 23 below) .
  • the yarn feeding package P1 is moved in a direction moving away from the winding rod 72 by controlling the operation of the package moving device 273 using the control unit 94 in a state in which the positions of the winding rod 72 and the suction gun 71 are fixed as shown in FIGS. 16(a) and 16(b) while the first yarn end Y1 is captured by the suction gun 71 by suction after the yarn portion at the end of winding of the yarn Y is wound on the winding rod 72 a plurality of times.
  • the first tension T1 is generated at the first portion YQ1 between the winding rod 72 and the suction gun 71 in the yarn portion at the end of winding and the second tension T2 is generated at the second portion YQ2 between the yarn layer YL and the first winding rod 72A in the yarn portion at the end of winding to satisfy the relationship of the above formula (1) corresponding to the Capstan equation. That is, the yarn feeding package P1 can be strongly pulled in a direction in which the yarn portion at the end of winding of the yarn Y and the yarn feeding package P1 move away from each other. As described above, as shown in FIGS. 17(a) and 17(b) , the knot KN including the slip knot of the yarn feeding package P1 is released.
  • the knot releasing device 270 it is possible to release the knot KN including the slip knot of the yarn feeding package P1 without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn Y to the suction gun 71 and providing the yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun 71.
  • the second tension T2 can be generated by the package moving device 273.
  • at least the suction gun 71, the winding rod 72, the package moving device 273, and the control unit 94 constitute the second tension generating portion.
  • a third embodiment will be described.
  • the difference from the first embodiment will be described.
  • a knot releasing device 370 of this embodiment is different from that of the first embodiment in that a winding rod rotation driving device (rod-shaped member rotating portion) 373 is provided instead of the rotary cylinder 73 (see FIG. 6 ) .
  • the winding rod rotation driving device 373 rotates the winding rod 72 in the rotation direction in which the yarn portion at the end of winding is pulled out from the yarn feeding package P1 with the axis of the winding rod 72 as the base axis in a state in which the positions of the winding rod 72 and the suction gun 71 are fixed.
  • the winding rod rotation driving device 373 is not particularly limited and various known devices can be used.
  • the winding rod rotation driving device 373 constitutes the second tension generating portion.
  • the winding rod rotation driving device 373 may include a motor or the like for rotating the winding rod 72.
  • the winding rod rotation driving device 373 is connected to the control unit 94 and the operation of the winding rod rotation driving device 373 is controlled by the control unit 94.
  • the yarn portion at the end of winding is pulled out from the yarn feeding package P1 in such a manner that the winding rod 72 is rotated by controlling the operation of the winding rod rotation driving device 373 using the control unit 94 in a state in which the positions of the winding rod 72 and the suction gun 71 are fixed as shown in FIGS. 19(a) and 19(b) while the first yarn end Y1 is captured by the suction gun 71 by suction after the yarn portion at the end of winding of the yarn Y is wound on the winding rod 72 a plurality of times.
  • the yarn portion at the end of winding is wound on the winding rod 72 counterclockwise and the winding rod 72 is rotated counterclockwise by the winding rod rotation driving device 373.
  • the yarn portion at the end of winding wound on the winding rod 72 is unwound, a part of the first portion YQ1 between the winding rod 72 and the suction gun 71 is newly sucked by the suction gun 71, and a part of the second portion YQ2 between the winding rod 72 and the yarn layer YL is newly wound on the winding rod 72.
  • the first tension T1 is generated at the first portion YQ1 between the suction gun 71 and the winding rod 72 in the yarn portion at the end of winding and the second tension T2 is generated at the second portion YQ2 between the yarn layer YL and the winding rod 72 in the yarn portion at the end of winding to satisfy the above formula (1) corresponding to the Capstan equation. That is, the yarn portion at the end of winding of the yarn Y can be strongly pulled from the yarn feeding package P1. As described above, as shown in FIGS. 20(a) and 20(b) , the knot KN including the slip knot of the yarn feeding package P1 is released.
  • the knot releasing device 370 it is possible to release the knot KN including the slip knot of the yarn feeding package P1 without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn Y to the suction gun 71 and providing the yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun 71.
  • the second tension T2 can be generated by the winding rod rotation driving device 373.
  • at least the suction gun 71, the winding rod 72, the winding rod rotation driving device 373, and the control unit 94 constitute the second tension generating portion.
  • a fourth embodiment will be described.
  • the difference from the first embodiment will be described.
  • a knot releasing device 470 of this embodiment is different from that of the first embodiment in that a tension member driving device (tension portion) 473 and a tension member (tension portion) 479 are provided instead of the rotary cylinder 73 (see FIG. 6 ) .
  • the tension member 479 is disposed between the winding rod 72 and the yarn layer YL.
  • the tension member 479 is a rod-shaped member that has an axis orthogonal to the yarn path of the second portion YQ2 between the yarn layer YL and the winding rod 72 in the yarn portion at the end of winding.
  • the tension member 479 has a circular tubular shape.
  • the tension member driving device 473 is a driving device which moves the tension member 479 to be pressed against the second portion YQ2.
  • the tension member driving device 473 is not particularly limited and various known devices can be used.
  • the tension member driving device 473 may include an air cylinder or the like which moves the tension member 479 toward the second portion YQ2 (in the example shown in the drawings, downward) .
  • the tension member driving device 473 is connected to the control unit 94 and the operation of the tension member driving device 473 is controlled by the control unit 94.
  • the tension member 479 is moved downward to be pressed against the second portion YQ2 and the second portion YQ2 is guided by the tension member 479 by controlling the operation of the tension member driving device 473 using the control unit 94 in a state in which the positions of the winding rod 72 and the suction gun 71 are fixed as shown in FIGS. 22 (a) and 22 (b) while the first yarn end Y1 is captured by the suction gun 71 by suction after the yarn portion at the end of winding of the yarn Y is wound on the winding rod 72 a plurality of times.
  • the first tension T1 is generated at the first portion YQ1 between the suction gun 71 and the winding rod 72 in the yarn portion at the end of winding and the second tension T2 is generated at the second portion YQ2 between the yarn layer YL and the winding rod 72 in the yarn portion at the end of winding to satisfy the relationship of the above formula (1) corresponding to the Capstan equation. That is, the yarn portion at the end of winding of the yarn Y can be strongly pulled from the yarn feeding package P1. As described above, as shown in FIGS. 23(a) and 23(b) , the knot KN including the slip knot of the yarn feeding package P1 is released.
  • the knot releasing device 470 it is possible to release the knot KN including the slip knot of the yarn feeding package P1 without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn Y to the suction gun 71 and providing the yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun 71.
  • the second tension T2 can be generated by the tension member driving device 473 and the tension member 479.
  • the tension member 479 was moved downward from above to be pressed against the first portion YQ1 and to release the knot KN, but the tension member 479 may be moved upward from below to be pressed against the first portion YQ1 or the tension member 479 may be moved from one side toward the other side in the horizontal direction to be pressed against the first portion YQ1.
  • the shape of the tension member 479 is not particularly limited and may be various shapes.
  • the tension member driving device 473 and the tension member 479 correspond to the tension portion. At least the suction gun 71, the winding rod 72, the tension member driving device 473, the tension member 479, and the control unit 94 constitute the second tension generating portion.
  • control unit 94 may not be provided in the package exchange device 9, but may be provided at a position remote from the package exchange device 9 to communicate with the package exchange device by wire or without wire.
  • the false twisting machine 1 has been described as an example of the yarn processing device, but the present invention is not limited thereto. That is, as an example of the processing portion 3, a device for twisting (false twisting) has been described, but a device for non-twisting (air jet processing) may be applied.
  • the knot KN of the yarn feeding package P1 may be released by respectively generating the first tension T1 and the second tension T2 at the first portion YQ1 and the second portion YQ2 in such a manner that the peg 25 is rotated and the yarn feeding package P1 is rotated so that the yarn feeding package P1 moves away from the winding rod 72 while the suction of the first yarn end Y1 using the suction gun 71 is maintained after the yarn portion at the end of winding of the yarn Y is wound on the winding rod 72 a plurality of times.
  • the knot KN of the yarn feeding package P1 may be released by respectively generating the first tension T1 and the second tension T2 at the first portion YQ1 and the second portion YQ2 in such a manner that the yarn feeding package P1 is rotated in a direction opposite to the direction in which the yarn Y is pulled out from the yarn feeding package P1 while the suction of the first yarn end Y1 using the suction gun 71 is maintained after the yarn portion at the end of winding of the yarn Y is wound on the winding rod 72 a plurality of times.
  • the yarn portion at the end of winding was wound on the winding rod 72 three times, but may be wound two times or four times or more.
  • the winding rod 72 was used as the wound portion, but if the yarn portion at the end of winding can be wound, other members may be used as the wound portion.
  • 9A yarn joining processing device, 20: creel stand (yarn feeding stand), 25: peg (first mounting portion, second mounting portion), 60: yarn joining device (yarn joining portion), 70, 270, 370, 470: knot releasing device (yarn package knot releasing device), 71: suction gun (yarn capturing portion, first tension generating portion, second tension generating portion), 72: winding rod (wound portion, rod-shaped member, first tension generating portion, second tension generating portion), 72A: first winding rod (first wound portion, first tension generating portion for first yarn package, second tension generating portion for first yarn package), 72B: second winding rod (second wound portion, first tension generating portion for second yarn package, second tension generating portion for second yarn package), 73: rotary cylinder (guide portion, second tension generating portion), 73A: first rotary cylinder (second tension generating portion for first yarn package), 73B: second rotary cylinder (second tension generating portion for second yarn package), 74: threading robot (yar

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  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Unwinding Of Filamentary Materials (AREA)
EP23203479.3A 2022-10-20 2023-10-13 Yarn package knot releasing device, yarn joining processing device, and yarn feeding device Pending EP4357284A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2022168231A JP2024060753A (ja) 2022-10-20 2022-10-20 糸パッケージの結び目解除装置、糸継処理装置及び給糸装置

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EP4357284A1 true EP4357284A1 (en) 2024-04-24

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EP23203479.3A Pending EP4357284A1 (en) 2022-10-20 2023-10-13 Yarn package knot releasing device, yarn joining processing device, and yarn feeding device

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EP (1) EP4357284A1 (enrdf_load_stackoverflow)
JP (1) JP2024060753A (enrdf_load_stackoverflow)
CN (1) CN117917368A (enrdf_load_stackoverflow)
TW (1) TW202417701A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120081251A (zh) * 2025-05-07 2025-06-03 常州永宝利染丝有限公司 一种大绞纱线生产用可调式成绞装置

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Publication number Priority date Publication date Assignee Title
US20020171245A1 (en) * 2000-10-24 2002-11-21 Thomas Jay Dee Automatic knot-tying machine
JP2021091987A (ja) 2019-12-09 2021-06-17 Ｔｍｔマシナリー株式会社 糸条ハンドリング装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020171245A1 (en) * 2000-10-24 2002-11-21 Thomas Jay Dee Automatic knot-tying machine
JP2021091987A (ja) 2019-12-09 2021-06-17 Ｔｍｔマシナリー株式会社 糸条ハンドリング装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120081251A (zh) * 2025-05-07 2025-06-03 常州永宝利染丝有限公司 一种大绞纱线生产用可调式成绞装置

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