Patent Description:
In a yarn package used for a textile machine, for example, in order to prevent a yarn portion at the end of winding of a yarn layer formed by winding a yarn on a bobbin from being released, 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. At this time, if 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. In this case, a robot can easily untie the knot instead of an operator. Then, in order to release the knot of the yarn by the robot, the robot needs a yarn capturing portion which captures the end of the yarn portion at the end of winding by suction. The yarn capturing portion may include only a mechanism that captures the end of the yarn portion at the end of winding by suction or may include a mechanism that sandwiches the end of the yarn portion at the end of winding together with a mechanism that captures the end of the yarn portion at the end of winding by suction.

For example, a yarn line handling device described in <CIT> 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 end of the yarn portion at the end of winding by suction but also a mechanism that sandwiches the end of the yarn portion at the end of winding.

Incidentally, the 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 end of the yarn portion at the end of winding with respect to the yarn package in which the 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. In the above-described conventional art, the 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 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 end of the yarn portion at the end of winding by suction is provided.

Further, in the above-described conventional art, the 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 end of the yarn portion at the end of winding by suction but also the mechanism that sandwiches the end of the yarn portion at the end of winding are provided. However, in this case, since the yarn sandwiching mechanism (clamp mechanism, chuck mechanism, etc.) 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. Further, in this case, the yarn may get entangled in the yarn sandwiching mechanism when strongly pulling the end of the yarn portion at the end of winding in a direction moving away from the yarn package. This point is also unrealistic.

Here, 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 according to an aspect of the present invention is a yarn package knot releasing device for releasing a knot in a yarn package in which a yarn portion at the end of winding of a yarn layer formed by winding a yarn on a bobbin is tied on an outer peripheral surface of the yarn layer by a knot including a slip knot, including: a yarn capturing portion which captures an end of the yarn portion at the end of winding by suction; a receiving portion which contacts the yarn capturing portion so that the end of the yarn portion at the end of winding captured by the yarn capturing portion is sandwiched between the yarn capturing portion and the receiving portion; a guide portion which guides the receiving portion from a first position to a second position in a direction moving away from the yarn package; and a yarn capturing portion moving portion which allows the yarn capturing portion to contact the receiving portion at the first position and moves the yarn capturing portion to the second position in a direction moving away from the yarn package while guiding the receiving portion by the guide portion in a state in which the yarn capturing portion contacts the receiving portion.

In the yarn package knot releasing device, the yarn capturing portion capturing the end of the yarn portion at the end of winding is brought into contact with the receiving portion to sandwich the yarn therebetween. Then, the receiving portion is guided by the guide portion in this state so that the end of the yarn portion at the end of winding is strongly pulled in a direction moving away from the yarn package and the knot including the slip knot can be released. Thus, according to the yarn package knot releasing device of an aspect of the present invention, it is possible to release the knot including the slip 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.

In the yarn package knot releasing device according to an aspect of the present invention, the first position may be a position in a range in which the distance from the knot is equal to or shorter than the length from the knot to the end of the yarn portion at the end of winding. In this case, the yarn capturing portion capturing the yarn portion at the end of winding can be reliably brought into contact with the receiving portion. Further, the second position may be a position in a range from one end to the other end of the yarn package in the width direction of the yarn package. In this case, when the receiving portion is guided by the guide portion so that the end of the yarn portion at the end of winding is strongly pulled in a direction moving away from the yarn package, the yarn portion at the end of winding wound on the bobbin can be suppressed from moving in the width direction of the yarn package until the yarn portion comes off from the bobbin.

In the yarn package knot releasing device according to an aspect of the present invention, the guide portion may include an urging holding means configured to urge the receiving portion from the second position toward the first position and hold the receiving portion at the first position. In this case, since the guide portion is configured by using the urging holding means, the yarn capturing portion and the receiving portion are reliably in close contact with each other and the yarn can be reliably sandwiched therebetween.

In the yarn package knot releasing device according to an aspect of the present invention, the receiving portion may include an elastic member provided with a concave portion and an inner surface of the concave portion may include a tapered surface which is inclined inward toward a bottom side. Accordingly, when the yarn capturing portion capturing the end of the yarn portion at the end of winding is brought into contact with the receiving portion, the yarn can be reliably sandwiched therebetween.

In the yarn package knot releasing device according to an aspect of the present invention, the yarn capturing portion may be provided at the tip of the yarn capturing portion moving portion. Accordingly, the yarn capturing portion moving portion can easily operate the yarn capturing portion.

In the yarn package knot releasing device according to an aspect of the present invention, the knot may be located on one side with respect to the center of the yarn package in a direction orthogonal to an axial direction of the yarn package, and the receiving portion may be located on the same one side as the knot with respect to the center of the yarn package. In this case, the yarn end of the yarn can be efficiently guided in a direction moving away from the yarn package.

In the yarn package knot releasing device according to an aspect of the present invention, the yarn package includes a first yarn package and a second yarn package, wherein the receiving portion includes a first receiving portion which contacts the yarn capturing portion so that the end of the yarn portion at the end of winding of the first yarn package is sandwiched between the yarn capturing portion and the first receiving portion and a second receiving portion which contacts the yarn capturing portion so that the end of the yarn portion at the end of winding of the second yarn package is sandwiched between the yarn capturing portion and the second receiving portion, wherein the guide portion includes a first guide portion which guides the first receiving portion in a direction moving away from the yarn package and a second guide portion which guides the second receiving portion in a direction moving away from the yarn package, wherein the yarn capturing portion moving portion allows the yarn capturing portion to contact the first receiving portion at the first position corresponding to the first receiving portion and moves the yarn capturing portion to the second position corresponding to the first receiving portion in a direction moving away from the yarn package while guiding the first receiving portion by the first guide portion in a state in which the yarn capturing portion contacts the first receiving portion, and wherein the yarn capturing portion moving portion allows the yarn capturing portion to contact the second receiving portion at the first position corresponding to the second receiving portion and moves the yarn capturing portion to the second position corresponding to the second receiving portion in a direction moving away from the yarn package while guiding the second receiving portion by the second guide portion in a state in which the yarn capturing portion contacts the second receiving portion. According to such a configuration, it is possible to release the knot corresponding to each of two yarn packages.

A yarn joining processing device according to an aspect of the present invention includes the yarn package knot releasing device and a yarn joining portion which connects a yarn end on an outer layer side of a first yarn package to a yarn end on an inner layer side of a second yarn package or connects a yarn end on an inner layer side of the first yarn package to a yarn end on an outer layer side of the second yarn package.

Since the yarn joining processing device includes the knot releasing device, it is possible to release the knot including the slip knot of the yarn package without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn and providing the yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion as described above.

A yarn feeding device according to an aspect of the present invention includes: a yarn feeding stand which includes a first mounting portion allowing a first yarn package to be mounted thereon and a second mounting portion allowing a second yarn package to be mounted thereon; the yarn package knot releasing device; and a yarn joining portion which connects a yarn end on an outer layer side of the first yarn package to a yarn end on an inner layer side of the second yarn package or connects a yarn end on an inner layer side of the first yarn package to a yarn end on an outer layer side of the second yarn package.

Since the yarn feeding device includes the knot releasing device, it is possible to release the knot including the slip knot of the yarn package without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn and providing the yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion as described above.

According to an aspect of the present invention, it is possible to provide 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.

Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

As shown in <FIG>, a yarn feeding device <NUM> of an embodiment includes a creel stand (yarn feeding stand) <NUM> and a yarn joining processing device 9A. The creel stand <NUM> is provided in a false twisting machine <NUM>. The yarn joining processing device 9A of an embodiment is mounted on a package exchange device <NUM>. The yarn joining processing device 9A includes a yarn joining device (yarn joining portion) <NUM>, a control unit <NUM>, and a knot releasing device (yarn package knot releasing device) <NUM> (see <FIG>). In the following description, the "Z direction" shown in the figure is the vertical direction (the up and down direction), the "X direction" is the horizontal direction, and the "Y direction" is the horizontal direction orthogonal to the "X direction".

The false twisting machine <NUM> shown in <FIG> manufactures a winding package P2 by processing yarns Y supplied from a plurality of yarn feeding packages (yarn packages) P1. The yarn Y is, for example, a synthetic yarn made of thermoplastic synthetic fibers such as polyester and polyamide. The yarn feeding package P1 is formed by winding a partially oriented yarn (POY) on a yarn feeding bobbin B1. The winding package P2 is formed by winding a draw textured yarn (DTY) on a winding bobbin B2. That is, the false twisting machine <NUM> processes the yarn Y which is the partially oriented yarn to generate the draw textured yarn.

As shown in <FIG>, an adapter <NUM> is attached to the yarn feeding package P1. The adapter <NUM> is attached to the end portion of the yarn feeding bobbin B1 of the yarn feeding package P1 to be synchronously rotatable. The adapter <NUM> is formed in a cylindrical shape. The adapter <NUM> is provided with a holding hole portion <NUM> 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 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 <NUM> is formed by a narrow tubular pipe provided inside the adapter <NUM> and extending in a bent manner. The holding hole portion <NUM> opens in the axial direction of the adapter <NUM>. An opening portion of the holding hole portion <NUM> is provided with a suction port that abuts on a suction mouth <NUM> to be described later. The suction port is a concave portion that tapers toward the center. The adapter <NUM> 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. In other words, 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 knot KN is located vertically below the center of the yarn feeding package P1 (one side in the direction perpendicular to the axial direction of the yarn feeding package P1) (see <FIG> and <FIG>).

As shown in <FIG>, the false twisting machine <NUM> includes a yarn feeding portion <NUM>, a processing portion <NUM>, and a winding portion <NUM>. A plurality of configurations of the yarn feeding portion <NUM>, the processing portion <NUM>, and the winding portion <NUM> are arranged in the Y direction (the longitudinal direction of the base) orthogonal to the traveling surface (the paper surface of <FIG>) of the yarn Y in which the yarn path is disposed from the yarn feeding portion <NUM> to the winding portion <NUM> through the processing portion <NUM>.

The yarn feeding portion <NUM> feeds the yarn Y to the processing portion <NUM>. The yarn feeding portion <NUM> includes a creel stand <NUM> which holds a plurality of the yarn feeding packages P1. As shown in <FIG> and <FIG>, the creel stand <NUM> includes a creel base portion <NUM>, a first support column <NUM>, a second support column <NUM>, a partition dish plate <NUM>, a peg <NUM>, and a clip <NUM>. The creel base portion <NUM> is installed on a floor surface or the like and supports the first support column <NUM> and the second support column <NUM>. The first support column <NUM> and the second support column <NUM> are erected on the creel base portion <NUM>.

The first support column <NUM> extends along the Z direction. The first support columns <NUM> are arranged at equal intervals in the Y direction. The first support column <NUM> is disposed at one side F1 of the creel stand <NUM> in the X direction. One side F1 of the X direction is a side in which the processing portion <NUM> 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 <NUM> for performing false twisting.

The second support column <NUM> extends along the Z direction. The second support columns <NUM> are arranged in pairs in the Y direction and a plurality of pairs of second support columns <NUM> and <NUM> are arranged in the Y direction. The second support column <NUM> is disposed at the other side F2 of the creel stand <NUM> in the X direction. The other side F2 of the X direction is a side in which the package exchange device <NUM> 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 <NUM> including the plurality of first support columns <NUM> and a group of the second support columns <NUM> including the plurality of second support columns <NUM> are arranged in the X direction to face each other.

The partition dish plate <NUM> is provided to straddle the first support column <NUM> and the second support column <NUM>. The partition dish plate <NUM> is a dish plate-shaped member and is arranged at a predetermined interval in the Z direction. The partition dish plate <NUM> prevents the yarn feeding package P1 from falling from the peg <NUM>.

The peg <NUM> supports the yarn feeding package P1. The peg <NUM> is provided in the second support column <NUM>. A plurality of (for example, four) pegs <NUM> are arranged at predetermined intervals in the Z direction of the second support column <NUM>. The peg <NUM> is disposed between two partition dish plates <NUM> in the Z direction. Further, the pegs <NUM> are arranged in pairs corresponding to the second support columns <NUM> and <NUM> and a plurality of sets (pairs) of the pegs <NUM> and <NUM> are arranged in the Y direction.

In the peg <NUM> with this configuration, the yarn Y of the yarn feeding package P1 supported by one peg <NUM> of the pair of pegs can be connected to the yarn Y of the yarn feeding package P1 supported by the other peg <NUM> of the pair of pegs. Specifically, the first yarn end Y1 of the yarn feeding package P1 supported by one peg <NUM> 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 <NUM> 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 <NUM> 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 <NUM> of the pair of pegs. Accordingly, one yarn Y is supplied (the yarn Y is continuously supplied) from two yarn feeding packages P1 and P1 respectively supported by the pair of pegs <NUM> and <NUM> to the processing portion <NUM>.

The clip <NUM> is disposed between the pair of pegs <NUM> and <NUM> in the Y direction. In this embodiment, the clip <NUM> is disposed at the center portion of the pair of pegs <NUM> and <NUM>. The yarn Y is sandwiched and locked by the clip <NUM>. Specifically, the clip <NUM> sandwiches and locks the yarn obtained by connecting the first yarn end Y1 and the second yarn end of two yarn feeding packages P1 and P1 respectively supported by the pair of pegs <NUM> and <NUM>.

The processing portion <NUM> performs false twisting on the yarn Y fed from the yarn feeding portion <NUM>. The processing portion <NUM> includes a twisting guide <NUM>, a first heating device <NUM>, a cooling device <NUM>, a false twisting device <NUM>, a second heating device <NUM>, and a feed roller <NUM> (feed rollers <NUM> to <NUM>). Each of the twisting guide <NUM>, the first heating device <NUM>, the cooling device <NUM>, the false twisting device <NUM>, the second heating device <NUM>, and the feed roller <NUM> (the feed rollers <NUM> to <NUM>) is individually provided for each yarn Y fed from the yarn feeding portion <NUM> and they are arranged in a row in the Y direction.

The twisting guide <NUM> prevents the twist applied to the yarn Y by the false twisting device <NUM> to be described later from propagating to the upstream side of the twisting guide <NUM> in the yarn traveling direction. The first heating device <NUM> heats the yarn Y sent from the yarn feeding portion <NUM> through the feed roller <NUM>. The cooling device <NUM> cools the yarn Y heated by the first heating device <NUM>. The false twisting device <NUM> twists the yarn Y. The second heating device <NUM> heats the yarn Y sent from the false twisting device <NUM> through the feed roller <NUM>.

The feed roller <NUM> is provided between the creel stand <NUM> and the twisting guide <NUM>, the feed roller <NUM> is provided between the false twisting device <NUM> and the second heating device <NUM>, and the feed roller <NUM> is provided between the second heating device <NUM> and a winding device <NUM>. Each feed roller <NUM> (feed rollers <NUM> to <NUM>) includes a drive roller and a driven roller. The feed rollers <NUM> are also arranged in a row in the Y direction.

The transfer speed of the yarn Y by the feed roller <NUM> is faster than the transfer speed of the yarn Y by the feed roller <NUM> and the yarn Y is stretched between the feed roller <NUM> and the feed roller <NUM>. The transfer speed of the yarn Y by the feed roller <NUM> is slower than the transfer speed of the yarn Y by the feed roller <NUM> and the yarn Y is relaxed between the feed roller <NUM> and the feed roller <NUM>.

In the processing portion <NUM> with the above-described configuration, the yarn Y stretched between the feed roller <NUM> and the feed roller <NUM> is twisted by the false twisting device <NUM>. The twist formed by the false twisting device <NUM> is propagated to the twisting guide <NUM>, but is not propagated to the upstream side of the twisting guide <NUM> in the yarn traveling direction. The yarn Y which is stretched and twisted is heated by the first heating device <NUM> to be heat-fixed and is cooled by the cooling device <NUM>. The yarn Y is untwisted on the downstream side from the false twisting device <NUM>, but each filament is maintained in a false twisted state by the above heat-fixing. The yarn Y is heat-fixed by the second heating device <NUM> while being relaxed between the feed roller <NUM> and the feed roller <NUM>. Finally, the yarn Y sent from the feed roller <NUM> is wound by the winding device <NUM> of the winding portion <NUM> to form the winding package P2.

The winding portion <NUM> includes the winding device <NUM>, a package stocker <NUM>, a doffing device (not shown), and the like. The winding device <NUM> winds the yarn Y false-twisted by the processing portion <NUM> to form the winding package P2. The package stocker <NUM> stores the winding package P2 formed by the winding device <NUM>. The doffing device removes the winding package P2 formed by the winding device <NUM>, transfers the winding package P2 to the package stocker <NUM>, and attaches an empty winding bobbin B2 to the winding device <NUM>.

The package exchange device <NUM> collects the yarn feeding bobbin B1 from the peg <NUM> and attaches the yarn feeding package P1 to the peg <NUM>. As shown in <FIG>, the package exchange device <NUM> travels along a rail <NUM>. The rail <NUM> is laid on a floor and extends in the Y direction. That is, the package exchange device <NUM> is provided to be able to travel along the Y direction. The package exchange device <NUM> includes a traveling unit <NUM>, an elevating unit <NUM>, a holding unit <NUM>, an exchange unit <NUM>, the yarn joining device <NUM>, and a control unit <NUM> (see <FIG>) which controls the operations thereof.

The traveling unit <NUM> is provided with a vehicle wheel traveling on the rail <NUM>, a drive mechanism, and the like. The traveling unit <NUM> supports the elevating unit <NUM>, the holding unit <NUM>, and the exchange unit <NUM>. The elevating unit <NUM> is elevated while the operator gets thereon. The elevating unit <NUM> is used for the maintenance or the like. The elevating unit <NUM> includes a work table <NUM> on which the operator gets, a guide portion <NUM> which supports the work table <NUM> to be movable in the Z direction, and a drive mechanism (not shown) which drives the work table.

The holding unit <NUM> holds the plurality of (for example, four) yarn feeding packages P1. The holding unit <NUM> receives the yarn feeding package P1 supplied from a package replenishing device (not shown), temporarily stores the yarn feeding package P1, and supplies the yarn feeding package P1 to the exchange unit <NUM>. The holding unit <NUM> is provided to be rotatable in a range of about <NUM>°. More specifically, the holding unit <NUM> is provided to be rotatable between a replenishment position in which the yarn feeding package P1 is supplied from the package replenishing device and a supply position (a position shown in <FIG>) in which the yarn feeding package P1 is supplied to the exchange unit <NUM>.

The exchange unit <NUM> exchanges the yarn feeding bobbin B1 and the yarn feeding package P1 in the peg <NUM>. Specifically, the exchange unit <NUM> collects the yarn feeding bobbin B1 (see <FIG>) from the peg <NUM> and attaches the yarn feeding package P1 to the peg <NUM>. The exchange unit <NUM> is provided adjacent to the holding unit <NUM>. As shown in <FIG>, the exchange unit <NUM> includes a base <NUM>, a rotation device <NUM>, a collection device <NUM>, a supply device <NUM>, and a rotary table <NUM>. Additionally, in <FIG>, the description of the rotation device <NUM>, the collection device <NUM>, the supply device <NUM>, the rotary table <NUM>, the yarn joining device <NUM>, and the knot releasing device <NUM> is omitted.

The base <NUM> includes the rotation device <NUM>, the collection device <NUM>, the supply device <NUM>, and the rotary table <NUM> supporting the yarn joining device <NUM>. The base <NUM> is provided to be elevatable along the Z direction. The rotation device <NUM> is fixed to the base <NUM>. The rotation device <NUM> rotates the peg <NUM> of the creel stand <NUM>. The rotation device <NUM> includes the rotation driver 932A and a rotation arm 932B.

The rotation driver 932A is a Geneva driver that constitutes the Geneva mechanism. The rotation driver 932A is rotated by the rotational driving of the motor (not shown). The rotation arm 932B supports the rotation driver 932A. The rotation arm 932B is provided to be swingable in the horizontal direction. The rotation arm 932B is driven by, for example, a motor or an air cylinder (not shown). The rotation device <NUM> is provided to correspond to one peg <NUM> and the other peg <NUM> provided in pairs in the creel stand <NUM>.

The rotation device <NUM> changes the direction of the peg <NUM> by rotating the peg <NUM> when attaching the yarn feeding package P1 to the peg <NUM>. More specifically, the rotation device <NUM> swings the rotation arm 932B so that the rotation driver 932A engages with the peg <NUM>. The rotation device <NUM> rotates the rotation driver 932A in one direction when the rotation driver 932A engages with the peg <NUM>. Accordingly, the peg <NUM> rotates.

The collection device <NUM> is provided in the rotary table <NUM> rotatably supported by the base <NUM>. The collection device <NUM> collects the yarn feeding bobbin B1 from the peg <NUM>. The collection device <NUM> includes a yarn feeding bobbin support portion 933A which supports the yarn feeding bobbin B1. The collection device <NUM> supports the yarn feeding bobbin B1 by advancing the yarn feeding bobbin support portion 933A while the yarn feeding bobbin B1 is not supported by the peg <NUM> and collects the yarn feeding bobbin B1 from the peg <NUM> by retracting the yarn feeding bobbin support portion 933A while the yarn feeding bobbin B1 is supported by the peg <NUM>.

The supply device <NUM> is provided in the rotary table <NUM> rotatably supported by the base <NUM>. The supply device <NUM> supplies the yarn feeding package P1 to the peg <NUM>. The supply device <NUM> includes a yarn feeding package supply unit 934A supporting the yarn feeding package P1. The supply device <NUM> attaches the yarn feeding package P1 to the peg <NUM> by advancing the yarn feeding package supply unit 934A while the yarn feeding package P1 is supported by the peg <NUM> and supplies the yarn feeding package P1 to the peg <NUM> by retracting the yarn feeding package supply unit 934A while the yarn feeding package P1 is not supported by the peg <NUM>.

The package exchange device <NUM> releases the knot KN of the yarn feeding package P1 (knot releasing process) and connects the yarn ends of the pair of yarn feeding packages P1 and P1 attached to the pair of pegs <NUM> and <NUM> of the creel stand <NUM> (yarn joining process) together with the collection of the yarn feeding bobbin B1 from the peg <NUM> and the attachment of the yarn feeding package P1 to the peg <NUM>. The knot releasing process and the yarn joining process are performed by the yarn joining processing device 9A. The yarn joining processing device 9A includes the yarn joining device <NUM>, the knot releasing device <NUM>, and the control unit <NUM>.

The yarn joining device <NUM> is provided in the rotary table <NUM> rotatably supported by the base <NUM>. The yarn joining device <NUM> performs yarn joining processing on the first yarn end Y1 of the yarn feeding package P1 supported by one peg <NUM> and the second yarn end Y2 of the yarn feeding package P1 supported by the other peg <NUM> or yarn joining processing on the second yarn end Y2 of the yarn feeding package P1 supported by one peg <NUM> and the first yarn end Y1 of the yarn feeding package P1 supported by the other peg <NUM>. Hereinafter, the yarn feeding package P1 supported (attached) by one peg <NUM> 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 <NUM> is referred to as a second yarn feeding package (second yarn package) P12.

Additionally, the peg <NUM> on which the first yarn feeding package P11 is mounted constitutes a first mounting portion and the peg <NUM> on which the second yarn feeding package P12 is mounted constitutes a second mounting portion. The yarn joining device <NUM> 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 rotary table <NUM> is rotated so that the yarn feeding bobbin support portion 933A is located in front of the target peg <NUM> when the yarn feeding bobbin B1 is collected. Further, the rotary table <NUM> is rotated so that the yarn feeding package supply unit 934A is located in front of the target peg <NUM> when the yarn feeding package P1 is supplied. Further, the rotary table <NUM> is rotated to be located in front of the target peg <NUM> when joining the yarn Y by the yarn joining device <NUM>.

As shown in <FIG>, the knot releasing device <NUM> includes a suction gun (yarn capturing portion) <NUM>, a receiving portion <NUM>, an air cylinder (guide portion) <NUM>, and a threading robot (yarn capturing portion moving portion) <NUM>. The suction gun <NUM> 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 <NUM> is provided at the tip of the threading robot <NUM>. The suction gun <NUM> includes a suction gun <NUM> and the suction mouth <NUM>.

A suction hose <NUM> leading to a negative pressure source is connected to the suction gun <NUM>, so that a suction flow is generated in the suction gun <NUM>. The base end side of the suction gun <NUM> is connected to the threading robot <NUM>. The suction mouth <NUM> is provided at the tip of the suction gun <NUM>. The suction mouth <NUM> sucks the yarn Y. The suction mouth <NUM> has a hemispherical surface on the tip side. The suction mouth <NUM> is connected to the suction gun <NUM> through a shaft portion and is elastically moved by a spring or the like with respect to the suction gun <NUM> in the axial direction. The suction gun <NUM> is connected to the control unit <NUM> (see <FIG>) and the capturing by suction is performed and stopped by the control unit <NUM>.

As shown in <FIG> and <FIG>, the receiving portion <NUM> contacts the suction gun <NUM> to sandwich the first yarn end Y1 captured by the suction gun <NUM> to be sandwiched by the suction gun <NUM> and the receiving portion. Specifically, the receiving portion <NUM> contacts the tip side of the suction mouth <NUM> to sandwich the first yarn end Y1 captured by the suction mouth <NUM> by suction to be sandwiched by the suction mouth <NUM> and the receiving portion.

The receiving portion <NUM> includes an elastic member <NUM> provided with a concave portion <NUM>. The inner surface of the concave portion <NUM> includes a tapered surface which is inclined inward toward a bottom side. The concave portion <NUM> here has a hemispherical concave shape corresponding to the tip side of the suction mouth <NUM>. The elastic member <NUM> is made of, for example, urethane rubber. The receiving portion <NUM> is located vertically below the center of the yarn feeding package P1 (one side in the direction orthogonal to the axial direction of the yarn feeding package P1). The receiving portion <NUM> includes a first receiving portion 72A which contacts the suction gun <NUM> so that the first yarn end Y1 of the first yarn feeding package P11 is sandwiched between the suction gun <NUM> and the first receiving portion and a second receiving portion 72B which contacts the suction gun <NUM> so that the first yarn end Y1 of the second yarn feeding package P12 is sandwiched between the suction gun <NUM> and the second receiving portion. For example, the first receiving portion 72A is disposed at one end side of the exchange unit <NUM> in the Y direction and the second receiving portion 72B is disposed at the other end side of the exchange unit <NUM> in the Y direction.

The air cylinder <NUM> guides the receiving portion <NUM> from a first position to a second position in a direction moving away from the yarn feeding package P1. The air cylinder <NUM> includes a piston rod <NUM> in which the receiving portion <NUM> is provided on the tip side and a cylinder tube <NUM> into which the piston rod <NUM> is inserted. The air cylinder <NUM> includes a throttle (not shown) that throttles the exhaust of air. The air cylinder <NUM> is connected to the control unit <NUM> and the supply of air to the air cylinder <NUM> is controlled by the control unit <NUM>. The throttle of the air cylinder <NUM> can be realized, for example, by providing a throttle valve on the exhaust side.

The piston rod <NUM> has, for example, a bar shape having a circular cross-section. The tip of the piston rod <NUM> is fixed to the end portion on the side opposite to the concave portion <NUM> in the receiving portion <NUM>. The piston rod <NUM> is disposed to be inclined with respect to the horizontal direction so that the tip side becomes higher than the base end side in the axial direction. The piston rod <NUM> is disposed in an inclined manner to be located on the inside of the Y direction as it goes toward the tip side. The center of the concave portion <NUM> of the receiving portion <NUM> is located on the axis of the piston rod <NUM>. The cylinder tube <NUM> has, for example, a cylindrical shape. The cylinder tube <NUM> is supported by a frame 93F of the exchange unit <NUM> through a bracket BR1.

For example, when air is supplied to such an air cylinder <NUM>, the piston rod <NUM> extends and the receiving portion <NUM> is located at the first position (see <FIG>). In this state, the throttle acts as a resistance and prevents air from being exhausted from the air cylinder <NUM>. Accordingly, an urging force that urges the receiving portion <NUM> from the second position toward the first position is generated and the receiving portion <NUM> is held at the first position. Then, when the receiving portion <NUM> is pressed toward the cylinder tube <NUM> against the urging force, the piston rod <NUM> contracts and the receiving portion <NUM> moves along the axial direction of the piston rod <NUM> to the second position in a direction moving away from the yarn feeding package P1 (see <FIG>). Additionally, a throttle for restricting the exhaust of air in the air cylinder <NUM> constitutes an urging holding means urging the receiving portion <NUM> from the second position toward the first position and holding the receiving portion at the first position.

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 receiving portion <NUM> when the piston rod <NUM> of the air cylinder <NUM> is in the most extended state. The second position is a position farther from the yarn feeding package P1 than the first position. For example, the second position is separated from the first position by, for example, <NUM> or more. The second position is a position of the receiving portion <NUM> when the piston rod <NUM> of the air cylinder <NUM> is in the most retracted state. Further, the second position is a position in a range 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 <NUM> is operated so that the end surface of the adapter <NUM> faces the suction gun <NUM>.

The air cylinder <NUM> includes a first air cylinder (first guide portion) 73A which guides the first receiving portion 72A in a direction moving away from the first yarn feeding package P11 and a second air cylinder (second guide portion) 73B which guides the second receiving portion 72B in a direction moving away from the second yarn feeding package P12. The first position of the second receiving portion 72B is lower than the first position of the first receiving portion 72A. The second position of the second receiving portion 72B is lower than the second position of the first receiving portion 72A. The first air cylinder 73A is disposed at one end side of the exchange unit <NUM> in the Y direction and the second air cylinder 73B is disposed at the other end side of the exchange unit <NUM> in the Y direction.

As shown in <FIG>, the threading robot <NUM> moves the suction gun <NUM>. The threading robot <NUM> is connected to the base end side of the suction gun <NUM>. The threading robot <NUM> includes a link mechanism and a plurality of motors. The threading robot <NUM> is supported by the frame 93F of the exchange unit <NUM> through a bracket BR2. The threading robot <NUM> is disposed at the center portion of the exchange unit <NUM> in the Y direction. The threading robot <NUM> is located between the first receiving portion 72A and the second receiving portion 72B in the Y direction. The threading robot <NUM> is not particularly limited, and various known robot arms can be used.

The threading robot <NUM> is connected to the control unit <NUM>. The threading robot <NUM> performs the knot releasing process under the control of the control unit <NUM>. That is, the threading robot <NUM> allows the suction mouth <NUM> of the suction gun <NUM> to contact the receiving portion <NUM> at the first position and moves the suction mouth <NUM> to the second position in a direction moving away from the yarn feeding package P1 while guiding the receiving portion <NUM> by the air cylinder <NUM> in a state in which the suction mouth <NUM> contacts the receiving portion <NUM>.

Specifically, the threading robot <NUM> allows the suction mouth <NUM> to contact the first receiving portion 72A at the first position corresponding to the first receiving portion 72A and moves the suction mouth <NUM> to the second position corresponding to the first receiving portion 72A in a direction moving away from the first yarn feeding package P11 while guiding the first receiving portion 72A by the first air cylinder 73A in a state in which the suction mouth <NUM> contacts the first receiving portion 72A. The threading robot <NUM> allows the suction mouth <NUM> to contact the second receiving portion 72B at the first position corresponding to the second receiving portion 72B and moves the suction mouth <NUM> to the second position corresponding to the second receiving portion 72B in a direction moving away from the second yarn feeding package P12 while guiding the second receiving portion 72B by the second air cylinder 73B in a state in which the suction mouth <NUM> contacts the second receiving portion 72B.

As shown in <FIG>, the control unit <NUM> is 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. The ROM stores a program for controlling each of the traveling unit <NUM>, the elevating unit <NUM>, the holding unit <NUM>, and the exchange unit <NUM>. Further, each function in the control unit <NUM> 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 <NUM> performs the knot releasing process by controlling at least the suction gun <NUM>, the air cylinder <NUM>, and the threading robot <NUM>. The control unit <NUM> performs the yarn joining process by controlling at least the suction gun <NUM>, the threading robot <NUM>, and the yarn joining device <NUM>.

Next, a series of operations including the knot releasing process of the yarn joining processing device 9A will be described in detail.

In the following description, an example of releasing the knot KN provided on the outer peripheral surface of the yarn layer YL of the first yarn feeding package P11 when joining the first yarn end Y1 of the first yarn feeding package P11 and the second yarn end of the second yarn feeding package P12 will be described with reference to <FIG>. Here, 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 wound.

As shown in <FIG>, in the initial state, for example, the peg <NUM> is not operated by a peg rotation device (not shown) of the yarn joining device <NUM>, the first yarn feeding package P11 does not rotate yet, and the end surface of the adapter <NUM> faces the side opposite to the suction gun <NUM>. Air is not supplied to the first air cylinder 73A, the piston rod <NUM> contracts, and the first receiving portion 72A is located at the second position.

In such an initial state, as shown in <FIG>, the peg <NUM> is first operated to rotate the first yarn feeding package P11 so that the end surface of the adapter <NUM> faces the suction gun <NUM>. The control unit <NUM> controls the threading robot <NUM> so that the suction mouth <NUM> of the suction gun <NUM> is moved and the suction mouth <NUM> is brought into contact with the suction port of the holding hole portion <NUM> holding the first yarn end Y1 in the adapter <NUM>. At the same time, the control unit <NUM> starts the suction by the suction gun <NUM> and captures the first yarn end Y1 by suction in the suction mouth <NUM>. Further, the control unit <NUM> supplies air to the first air cylinder 73A, extends the piston rod <NUM>, and positions the first receiving portion 72A at the first position.

Next, as shown in <FIG>, the control unit <NUM> controls the threading robot <NUM> so that the suction mouth <NUM> capturing the first yarn end Y1 by suction is moved, the suction mouth <NUM> is brought into contact with the concave portion <NUM> of the first receiving portion 72A, and the first yarn end Y1 is sandwiched therebetween. In this state, as shown in <FIG>, the control unit <NUM> controls the threading robot <NUM> so that the suction mouth <NUM> is pressed with respect to the concave portion <NUM> of the first receiving portion 72A against the urging force of the first air cylinder 73A along the axial direction of the piston rod <NUM>. Accordingly, as shown in <FIG>, the piston rod <NUM> contracts and the suction mouth <NUM> and the first receiving portion 72A move in a direction moving away from the first yarn feeding package P11 along the axial direction of the piston rod <NUM> while being guided by the first air cylinder 73A in a contact state.

Then, the control unit <NUM> controls the threading robot <NUM> so that the suction mouth <NUM> is continuously pressed into the first receiving portion 72A. Accordingly, as shown in <FIG>, the piston rod <NUM> further contracts and the suction mouth <NUM> and the first receiving portion 72A move to the second position in a direction moving away from the first yarn feeding package P11 along the axial direction of the piston rod <NUM> while being guided by the first air cylinder 73A in a contact state. As a result, as shown in <FIG>, the first yarn end Y1 can be strongly pulled in a direction moving away from the first yarn feeding package P11 from the position of the first position PA of the first receiving portion 72A to the second position PB. As a result, the knot KN including the slip knot of the first yarn feeding package P11 is released.

Then, the control unit <NUM> controls the threading robot <NUM> so that the suction mouth <NUM> capturing the first yarn end Y1 by suction is moved to the yarn joining device <NUM>, the suction by the suction mouth <NUM> is stopped to release the capturing by suction, and the first yarn end Y1 is set (guided) to the yarn joining device <NUM>. Further, the control unit <NUM> controls the suction gun <NUM> and the threading robot <NUM> so that the second yarn end of the second yarn feeding package P12 is captured by the suction mouth <NUM> by suction, the suction mouth <NUM> is moved to the yarn joining device <NUM>, the suction by the suction mouth <NUM> 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 <NUM>. Then, the control unit <NUM> controls the yarn joining device <NUM> 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.

Additionally, 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 wound is also the same as the above-described example shown in <FIG>. In this case, as shown in <FIG>, the first yarn end Y1 can be strongly pulled in a direction moving away from the second yarn feeding package P12 from the position of the first position PA of the second receiving portion 72B to the second position PB and the knot KN including the slip knot of the second yarn feeding package P12 can be released.

As described above, in the knot releasing device <NUM>, the suction gun <NUM> capturing the first yarn end Y1 is brought into contact with the receiving portion <NUM> to sandwich the yarn Y therebetween. Then, the receiving portion <NUM> is guided by the air cylinder <NUM> in this state so that the first yarn end Y1 is strongly pulled in a direction moving away from the yarn feeding package P1 (the first yarn end Y1 is pulled in a clamp state) and the knot KN including the slip knot can be released. Thus, according to the knot releasing device <NUM>, the knot KN including the slip knot of the yarn feeding package P1 can be released without supplying a large amount of compressed fluid causing a negative pressure for strongly pulling the yarn Y to the suction gun <NUM> and providing a yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun <NUM>.

In the knot releasing device <NUM>, 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 suction gun <NUM> capturing the yarn portion at the end of winding of the yarn layer YL in the yarn feeding package P1 can be reliably brought into contact with the receiving portion <NUM>. Further, the second position is a position in a range 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, when the receiving portion <NUM> is guided by the air cylinder <NUM> so that the first yarn end Y1 is strongly pulled in a direction moving away from the yarn feeding package P1, the yarn portion at the end of winding of the yarn layer YL wound on the yarn feeding bobbin B1 can be suppressed from moving in the width direction of the yarn feeding package P1 until the yarn portion comes off from the yarn feeding bobbin B1.

In the knot releasing device <NUM>, the air cylinder <NUM> urges the receiving portion <NUM> from the second position toward the first position to be held at the first position. In this case, the suction gun <NUM> and the receiving portion <NUM> are in close contact with each other and the yarn Y can be reliably sandwiched.

In the knot releasing device <NUM>, the receiving portion <NUM> includes the elastic member <NUM> provided with the concave portion <NUM> and the inner surface of the concave portion <NUM> includes a tapered surface which is inclined inward toward a bottom side. Accordingly, when the suction gun <NUM> capturing the first yarn end Y1 contacts the receiving portion <NUM>, the yarn Y can be reliably sandwiched therebetween.

In the knot releasing device <NUM>, the suction gun <NUM> is provided at the tip of the threading robot <NUM>. Accordingly, the threading robot <NUM> can easily operate the suction gun <NUM>.

In the knot releasing device <NUM>, the knot KN is located at one side with respect to the center of the yarn feeding package P1 in a direction orthogonal to the axial direction of the yarn feeding package P1. The receiving portion <NUM> is located at the same side as the knot KN with respect to the center of the yarn feeding package P1. In this case, the first yarn end Y1 can be efficiently guided in a direction moving away from the yarn feeding package P1.

In the knot releasing device <NUM>, the yarn feeding package P1 includes the first yarn feeding package P11 and the second yarn feeding package P12, the receiving portion <NUM> includes the first receiving portion 72A and the second receiving portion 72B, and the air cylinder <NUM> includes the first air cylinder 73A and the second air cylinder 73B. The threading robot <NUM> allows the suction gun <NUM> to contact the first receiving portion 72A at the first position corresponding to the first receiving portion 72A and moves the suction gun <NUM> to the second position corresponding to the first receiving portion 72A in a direction moving away from the yarn feeding package P1 while guiding the first receiving portion 72A by the first air cylinder 73A in a state in which the suction gun <NUM> contacts the first receiving portion 72A. Further, the threading robot <NUM> allows the suction gun <NUM> to contact the second receiving portion 72B at the first position corresponding to the second receiving portion 72B and moves the suction gun <NUM> to the second position corresponding to the second receiving portion 72B in a direction moving away from the yarn feeding package P1 while guiding the second receiving portion 72B by the second air cylinder 73B in a state in which the suction gun <NUM> contacts the second receiving portion 72B. According to such a configuration, it is possible to release the knot KN corresponding to each of two yarn feeding packages P1.

Since the yarn joining processing device 9A and the yarn feeding device <NUM> include the knot releasing device <NUM>, 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 <NUM> and providing a yarn sandwiching mechanism for sandwiching the yarn Y in the suction gun <NUM> as described above.

In this embodiment, the yarn feeding package P1 may be rotated or the yarn feeding package P1 may not be rotated so the tension is applied to the yarn portion at the end of winding of the yarn layer YL of the yarn feeding package P1 while the suction gun <NUM> capturing the first yarn end Y1 is brought into contact with the receiving portion <NUM> to sandwich the yarn Y. When the yarn feeding package P1 is not rotated, energy consumption can be reduced. Further, in this embodiment, the suction by the suction gun <NUM> may be continued or the suction may be stopped while the suction gun <NUM> capturing the first yarn end Y1 is brought into contact with the receiving portion <NUM> to sandwich the yarn Y. When the suction by the suction gun <NUM> stops, energy consumption can be reduced.

Although the embodiment of an aspect of the present invention has been described above, an aspect of the present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention, as defined by the appended claims.

In the above-described embodiment, an example has been described in which the control unit <NUM> that comprehensively controls the traveling unit <NUM>, the elevating unit <NUM>, the holding unit <NUM>, the exchange unit <NUM>, and the yarn joining device <NUM> of the package exchange device <NUM> controls the knot releasing device <NUM>, but the present invention is not limited thereto. The control unit <NUM> may be provided to exclusively control the knot releasing device <NUM>. Further, the control unit <NUM> may not be provided in the package exchange device <NUM>, but may be provided at a position remote from the package exchange device <NUM> to communicate with the package exchange device by wire or wirelessly.

In the above-described embodiment and the above-described modified example, a magnetic force using a magnet may be used for the contact of the suction mouth <NUM> of the suction gun <NUM> with respect to the receiving portion <NUM>. In the above-described embodiment and the above-described modified example, the receiving portion <NUM> is urged from the second position toward the first position by the throttle of the exhaust of the air cylinder <NUM>, but the present invention is not limited thereto. For example, the receiving portion <NUM> may be urged from the second position toward the first position by the elastic force of the spring and the magnetic force of the magnet. In the above-described embodiment and the above-described modified example, the false twisting machine <NUM> 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 <NUM>, a device for twisting (false twisting) has been described, but a device for non-twisting (air jet processing) may be applied.

In the air cylinder <NUM> of the above-described embodiment and the above-described modified example, in order to make the movement smooth when the piston rod <NUM> is extended to move (advance) the receiving portion <NUM> in a direction moving close to the yarn feeding package P1, the throttle of the exhaust may be configured in a one-way direction. In the air cylinder <NUM> of the above-described embodiment and the above-described modified example, since air is released from the air cylinder <NUM> when the receiving portion <NUM> moves in a direction moving away from the yarn feeding package P1 and is located at the second position, the resistance (urging force) may not be maintained. In the air cylinder <NUM> of the above-described embodiment and the above-described modified example, the first yarn end Y1 may be sandwiched between the receiving portion <NUM> and the suction gun <NUM> by using the urging force only while the suction mouth <NUM> is pressed into the receiving portion <NUM> to move the receiving portion <NUM>.

Claim 1:
A yarn package knot releasing device (<NUM>) for releasing a knot in a yarn package (P1) in which a yarn portion at the end of winding of a yarn layer (YL) formed by winding a yarn (Y) on a bobbin (B1) is tied on an outer peripheral surface of the yarn layer by a knot (KN) including a slip knot, comprising:
a yarn capturing portion (<NUM>) which captures an end (Y1) of the yarn portion at the end of winding by suction;
a receiving portion (<NUM>) which contacts the yarn capturing portion so that the end of the yarn portion at the end of winding captured by the yarn capturing portion is sandwiched between the yarn capturing portion and the receiving portion;
a guide portion (<NUM>) which guides the receiving portion from a first position (PA) to a second position (PB) in a direction moving away from the yarn package; and
a yarn capturing portion moving portion (<NUM>) which allows the yarn capturing portion to contact the receiving portion at the first position and moves the yarn capturing portion to the second position in a direction moving away from the yarn package while guiding the receiving portion by the guide portion in a state in which the yarn capturing portion contacts the receiving portion.