Thread package knot release device, thread splicing device, and yarn feeding device

Abstract

To provide a device that releases a knot containing a slip knot of a yarn package without the need to supply a yarn trap with a large amount of compressive fluid that produces negative pressure to pull the yarn strongly and without providing a yarn clamping mechanism to the yarn trap.SOLUTION: A knot releasing device 70 unties a knot KN including a slip knot of a yarn feed package P1. The knot releasing device 70 is equipped with a suction gun 71, a receiving part 72 in contact with the suction gun 71 so as to sandwich a first thread end Y1 sucked and captured by the suction gun 71, an air cylinder 73 for guiding the receiving part 72 away from the yarn feed package P1 from a first position PA to a second position PB, and a threading robot 74 for moving the suction gun 71 to the second position while allowing the air cylinder 73 to guide the receiving part 72 with the suction gun 71 in contact with the receiving part 72 at the first position.SELECTED DRAWING: Figure 17

Description

Technical Field

[0001] One aspect of the present invention relates to a knot releasing device for a yarn package, a yarn splicing device, and a yarn feeding device.

Background Art

[0002] In a yarn package used in a textile machine, for example, in order to prevent the yarn portion at the end of winding of a yarn layer formed by winding the yarn around a bobbin from unraveling, the yarn portion at the end of winding may be tied to the outer peripheral surface of the yarn layer to tie the yarn. At this time, if the yarn is tied with a knot including a slip knot (also referred to as a "pull-apart knot"), the knot can be easily untied by pulling the yarn portion at the end of winding. In this case, a robot can easily untie the knot of the yarn instead of an operator. And in order for the robot to untie the knot of the yarn, a yarn catching part that sucks and catches the end of the yarn portion at the end of winding is required for the robot. The yarn catching part may be configured to include only a mechanism that sucks and catches the end of the yarn portion at the end of winding, or may be configured to include a mechanism that sucks and catches the end of the yarn portion at the end of winding and a mechanism that clamps the end of the yarn portion at the end of winding.

[0003] For example, the yarn handling device described in Patent Document 1 includes a yarn catching part (second catching mechanism) that can suck and catch a yarn (yarn strand) by a negative pressure generated when compressed fluid is supplied. This yarn catching part becomes a catching state in which the yarn can be caught while sandwiching the yarn when the compressed fluid is not supplied, and becomes a released state in which the yarn is not sandwiched from the catching state when the compressed fluid is supplied. This yarn handling device corresponds to a case where it is configured to include not only a mechanism that sucks and catches the end of the yarn portion at the end of winding but also a mechanism that clamps the end of the yarn portion at the end of winding.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when capturing the end of the thread portion at the end of winding with respect to a thread package in which the end of the thread portion at the end of winding is tied to the outer peripheral surface of the thread layer of the thread package with a knot including a slip knot, in order to untie the knot, it is necessary to strongly pull the end of the thread portion at the end of winding in a direction away from the thread package. In the prior art as described above, when configured to include only a mechanism for sucking and capturing the end of the thread portion at the end of winding, in order to untie the knot, in order to strongly pull the end of the thread portion at the end of winding in a direction away from the thread package, it is necessary to suck the end of the thread portion at the end of winding by the negative pressure generated when a large amount of compressed fluid is supplied.

[0006] Further, in the prior art as described above, when configured to include not only a mechanism for sucking and capturing the end of the thread portion at the end of winding but also a mechanism for clamping the end of the thread portion at the end of winding, it is possible to strongly pull the end of the thread portion at the end of winding in a direction away from the thread package by the thread capturing portion that captures the thread while sandwiching it. However, in this case, since a thread clamping mechanism (such as a clamp mechanism and a chuck mechanism) for sandwiching the thread is provided in the thread capturing portion, the size of the thread capturing portion becomes large, and there is a possibility that the thread capturing portion cannot pass through a narrow space, which is not practical. Also in this case, when strongly pulling the end of the thread portion at the end of winding in a direction away from the thread package, there is a possibility that the thread gets entangled in the thread clamping mechanism, and this is also not practical in this regard.

[0007] Therefore, an object of one aspect of the present invention is to provide a knot releasing device, a thread splicing processing device, and a yarn feeding device for a thread package that can release a knot including a slip knot of the thread package without the need to supply a large amount of compressed fluid that generates a negative pressure for strongly pulling the thread to the thread capturing portion, and without providing a thread clamping mechanism for sandwiching the thread to the thread capturing portion.

Means for Solving the Problems

[0008] The knot releasing device for a yarn package according to one aspect of the present invention is a device for releasing a knot that knots a yarn portion at the end of winding of a yarn layer formed by winding a yarn around a bobbin to the outer peripheral surface of the yarn layer with a knot including a slip knot. The device includes a yarn capturing portion that captures by sucking the end of the yarn portion at the end of winding, a receiving portion that contacts the yarn capturing portion so as to sandwich the end of the yarn portion at the end of winding captured by the yarn capturing portion between the receiving portion and the yarn capturing portion, a guiding portion that guides the receiving portion from a first position to a second position in a direction away from the yarn package, a yarn capturing portion moving portion that contacts the yarn capturing portion with the receiving portion at the first position and moves the yarn capturing portion to the second position in a direction away from the yarn package while guiding the receiving portion by the guiding portion in a state where the yarn capturing portion and the receiving portion are in contact with each other. A knot releasing device for a yarn package.

[0009] In this knot releasing device for a yarn package, by bringing the yarn capturing portion that has captured the end of the yarn portion at the end of winding into contact with the receiving portion, the yarn can be sandwiched between them. And in this state, by guiding the receiving portion by the guiding portion, the end of the yarn portion at the end of winding can be strongly pulled in a direction away from the yarn package, and the knot including the slip knot can be released. Therefore, according to the knot releasing device for a yarn package according to one aspect of the present invention, it is not necessary to supply a large amount of compressed fluid that generates a negative pressure for strongly pulling the yarn to the yarn capturing portion, and it is possible to release the knot including the slip knot of the yarn package without providing a yarn sandwiching mechanism for sandwiching the yarn in the yarn capturing portion.

[0010] In the knot release device for a yarn package according to one aspect of the present invention, the first position may be a position within a range where the distance from the knot is equal to or less than the length from the knot to the end of the wound yarn portion. In this case, it becomes possible to reliably bring the yarn catching portion in the state of catching the wound yarn portion into contact with the receiving portion. Further, the second position may be a position within the range between one end and 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 guiding portion and the end of the wound yarn portion is strongly pulled in a direction away from the yarn package, it is possible to suppress the wound yarn portion wound around the bobbin from moving in the width direction of the yarn package until it comes off the bobbin.

[0011] In the knot release device for a yarn package according to one aspect of the present invention, the guiding portion may have a biasing and holding means for biasing the receiving portion from the second position toward the first position and holding it at the first position. In this case, by configuring the guiding portion using the biasing and holding means, the yarn catching portion and the receiving portion come into close contact with each other, and the yarn can be reliably pinched.

[0012] In the knot release device for a yarn package according to one aspect of the present invention, the receiving portion may have an elastic member in which a recess is formed, and the inner surface of the recess may include a tapered surface that inclines inward as it goes toward the bottom side. Thereby, when the yarn catching portion that has caught the end of the wound yarn portion is brought into contact with the receiving portion, it becomes possible to reliably pinch the yarn between them.

[0013] In the knot release device for a yarn package according to one aspect of the present invention, the yarn catching portion may be provided at the tip of the yarn catching portion moving portion. Thereby, the yarn catching portion moving portion can easily operate the yarn catching portion.

[0014] In the knot release device for a yarn package according to one aspect of the present invention, the knot is located on one side with respect to the center of the yarn package in a direction orthogonal to the 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 away from the yarn package.

[0015] In the knot releasing device for a yarn package according to one aspect of the present invention, the yarn package includes a first yarn package and a second yarn package. The receiving part includes a first receiving part that contacts the yarn catching part so as to sandwich the end of the yarn part at the end of winding of the first yarn package between the yarn catching part, and a second receiving part that contacts the yarn catching part so as to sandwich the end of the yarn part at the end of winding of the second yarn package between the yarn catching part. The guiding part includes a first guiding part that guides the first receiving part in a direction away from the yarn package, and a second guiding part that guides the second receiving part in a direction away from the yarn package. The yarn catching part moving part contacts the yarn catching part with the first receiving part at the first position corresponding to the first receiving part, and while keeping the yarn catching part and the first receiving part in contact, guides the first receiving part by the first guiding part and moves the yarn catching part in a direction away from the yarn package to the second position corresponding to the first receiving part. The yarn catching part is contacted with the second receiving part at the first position corresponding to the second receiving part, and while keeping the yarn catching part and the second receiving part in contact, guides the second receiving part by the second guiding part and moves the yarn catching part in a direction away from the yarn package to the second position corresponding to the second receiving part. According to such a configuration, it is possible to cope with the release of the knots corresponding to each of the two yarn packages.

[0016] The yarn splicing processing device according to one aspect of the present invention includes the above-described knot releasing device for a yarn package, and a yarn splicing part for connecting the yarn end on the outer layer side of the first yarn package and the yarn end on the inner layer side of the second yarn package, or for connecting the yarn end on the inner layer side of the first yarn package and the yarn end on the outer layer side of the second yarn package.

[0017] Since this yarn splicing processing device includes the above-described knot releasing device, similarly to the above, it is not necessary to supply a large amount of compressed fluid that generates a negative pressure for strongly pulling the yarn to the yarn catching part, and it is possible to release the knot including the slip knot of the yarn package without providing a yarn clamping mechanism for clamping the yarn to the yarn catching part.

[0018] The yarn feeding device according to one aspect of the present invention includes a yarn feeding stand having a first mounting portion on which a first yarn package is mounted and a second mounting portion on which a second yarn package is mounted, a knot releasing device for the yarn package, and a yarn splicing portion for connecting the yarn end on the outer layer side of the first yarn package and the yarn end on the inner layer side of the second yarn package, or for connecting the yarn end on the inner layer side of the first yarn package and the yarn end on the outer layer side of the second yarn package.

[0019] Since this yarn feeding device is provided with the knot releasing device, similarly to the above, it is not necessary to supply a large amount of compressed fluid for generating a negative pressure for strongly pulling the yarn to the yarn catching portion, and it is possible to release the knot including the slip knot of the yarn package without providing a yarn clamping mechanism for clamping the yarn to the yarn catching portion.

Advantages of the Invention

[0020] According to one aspect of the present invention, it is possible to provide a knot releasing device, a yarn splicing processing device, and a yarn feeding device for a yarn package that can release a knot including a slip knot of the yarn package without supplying a large amount of compressed fluid for generating a negative pressure for strongly pulling the yarn to the yarn catching portion and without providing a yarn clamping mechanism for clamping the yarn to the yarn catching portion.

Brief Description of the Drawings

[0021]

Figure 1

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Figure 16

Figure 17

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments 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 duplicate descriptions are omitted.

[0023] As shown in FIG. 1, a yarn feeding device 100 according to an embodiment includes a creel stand (yarn feeding stand) 20 and a yarn splicing processing device 9A. The creel stand 20 is provided on a false twisting machine 1. The yarn splicing processing device 9A according to an embodiment is mounted on a package exchanging device 9. The yarn splicing processing device 9A includes a yarn splicing device (yarn splicing part) 60, a control part 94, and a knot releasing device (knot releasing device for yarn package) 70 (see FIG. 6). In the following description, the “Z direction” shown in the figure is the vertical direction (up and down direction), the “X direction” is the horizontal direction, and the “Y direction” is the horizontal direction orthogonal to the “X direction”.

[0024] The false twisting machine 1 shown in FIG. 1 processes the yarn Y supplied from a plurality of yarn packages (yarn packages) P1 to produce a winding package P2. The yarn Y is, for example, a synthetic fiber yarn made of a thermoplastic synthetic fiber such as polyester or polyamide. The yarn 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 drawn textured yarn (DTY) on a winding bobbin B2. That is, the false twisting machine 1 processes the yarn Y, which is a partially oriented yarn, to generate a drawn textured yarn.

[0025] As shown in FIG. 2, an adapter 8 is attached to the yarn package P1. The adapter 8 is mounted on the end of the yarn feeding bobbin B1 of the yarn package P1 so as to be rotatable synchronously. The adapter 8 is formed in a cylindrical shape. The adapter 8 is formed with a holding hole portion 81 for allowing and holding the yarn end of the yarn Y on the outer layer side (mouth yarn side) of the yarn package P1 (hereinafter, the yarn end of the yarn Y on the outer layer side is also referred to as “first yarn end Y1”). The first yarn end Y1 is the end of the yarn portion at the end of the winding of the yarn layer YL formed by winding the yarn Y on the yarn feeding bobbin B1.

[0026] The holding hole 81 is constituted by a thin tubular pipe that is provided inside the adapter 8 and bends and extends. The holding hole 81 opens in the axial direction of the adapter 8. At the opening portion of the holding hole 81, a suction port that abuts against a suction mouse 712 described later is formed. The suction port is a concave portion that is tapered and recessed toward its center. The adapter 8 is attached to the yarn supply package P1 by, for example, an operator.

[0027] In the yarn supply package P1, the end yarn portion of the yarn layer YL at the end of winding is tied to the outer peripheral surface of the yarn layer YL with a knot KN including a slip knot. In other words, in the yarn supply package P1, the end yarn portion of the yarn layer YL at the end of winding is tied with a knot KN so as not to come loose. A slip knot is also referred to as a pull-apart knot. Such a knot KN fixes the end yarn portion of the yarn layer YL at the end of winding to the outer peripheral surface of the yarn layer YL and can be untied by pulling the first yarn end Y1 to release the fixing. The knot KN is located on the lower side in the vertical direction with respect to the center of the yarn supply package P1 (one side in the direction orthogonal to the axial direction of the yarn supply package P1) (see FIGS. 16 and 17).

[0028] As shown in FIG. 1, the false-twist processing machine 1 includes a yarn supply section 2, a processing section 3, and a winding section 4. Each component of the yarn supply section 2, the processing section 3, and the winding section 4 is arranged in a plurality in the Y direction (the longitudinal direction of the machine base), which is orthogonal to the running surface of the yarn Y (the plane of FIG. 1) where the yarn path from the yarn supply section 2 through the processing section 3 to the winding section 4 is arranged.

[0029] The yarn supply section 2 supplies the yarn Y to the processing section 3. The yarn supply section 2 includes a creel stand 20 that holds a plurality of yarn supply packages P1. As shown in FIGS. 1 and 3, the creel stand 20 includes a creel base portion 21, a first support column 22, a second support column 23, a partition plate 24, pegs 25, and clips 29. The creel base portion 21 is installed on the 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.

[0030] 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 columns 22 are arranged on one side F1 in the X direction in the creel stand 20. One side F1 in the X direction is the side where the processing unit 3 to be described in detail later is arranged, and is the side where the yarn Y is sent out to the processing unit 3 that performs false twisting processing.

[0031] 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, 23 are arranged in the Y direction. The second support columns 23 are arranged on the other side F2 in the X direction in the creel stand 20. The other side F2 in the X direction is the side where the package exchange device 9 to be described in detail later travels, and is the side where the operator who performs the yarn splicing operation works. The group of first support columns 22 composed of a plurality of first support columns 22 and the group of second support columns 23 composed of a plurality of second support columns 23 are arranged opposite to each other in the X direction.

[0032] The partition plate 24 is provided so as to straddle the first support column 22 and the second support column 23. The partition plate 24 is a plate-shaped member and is arranged at a predetermined interval in the Z direction. The partition plate 24 prevents the supply yarn package P1 from falling from the peg 25.

[0033] The peg 25 supports the supply yarn package P1. The peg 25 is provided on the second support column 23. A plurality (for example, 4) of pegs 25 are arranged at a predetermined interval in the Z direction of the second support column 23. The peg 25 is arranged between two partition plates 24 in the Z direction. Further, the pegs 25 are arranged in pairs corresponding to the second support columns 23, 23 arranged in pairs, and a plurality of pairs (a pair) of pegs 25, 25 are arranged in the Y direction.

[0034] In the peg 25 of this configuration, the yarn Y of the yarn supply package P1 supported by one of the pair of pegs 25 and the yarn Y of the yarn supply package P1 supported by the other of the pair of pegs 25 can be connected. Specifically, the first yarn end Y1 of the yarn supply package P1 supported by one of the pair of pegs 25 and the yarn end of the yarn Y on the inner layer side (the end yarn side) of the yarn supply package P1 supported by the other of the pair of pegs 25 (hereinafter, the yarn end of the yarn Y on the inner layer side is also referred to as the "second yarn end") are connected, or the second yarn end of the yarn supply package P1 supported by one of the pair of pegs 25 and the first yarn end Y1 of the yarn supply package P1 supported by the other of the pair of pegs 25 can be connected. Thereby, one yarn Y is supplied (the yarn Y is continuously supplied) from the two yarn supply packages P1, P1 respectively supported by the pair of pegs 25, 25 to the processing section 3.

[0035] The clip 29 is arranged between the pair of pegs 25, 25 in the Y direction. In the present embodiment, it is arranged at the central part of the pair of pegs 25, 25. The yarn Y is clamped and locked by the clip 29. Specifically, the clip 29 clamps and locks the yarn connecting the first yarn end Y1 and the second yarn end of the two yarn supply packages P1, P1 respectively supported by the pair of pegs 25, 25.

[0036] The processing section 3 performs false twisting on the yarn Y supplied from the yarn supply section 2. The processing section 3 includes a twist stop guide 31, a first heating device 32, a cooling device 33, a false twisting device 34, a second heating device 35, and feed rollers 36 (feed rollers 361 to 363). Each of the twist stop guide 31, the first heating device 32, the cooling device 33, the false twisting device 34, the second heating device 35, and the feed rollers 36 (feed rollers 361 to 363) is provided individually for each yarn Y supplied from the yarn supply section 2 and is arranged in a row in the Y direction.

[0037] The twist stop guide 31 prevents the twist imparted to the yarn Y by the false twisting device 34 described later from propagating upstream in the yarn running direction from the twist stop guide 31. The first heating device 32 heats the yarn Y fed from the yarn supply section 2 via the feed roller 361. The cooling device 33 cools the yarn Y heated by the first heating device 32. The false twisting device 34 twists the yarn Y. The second heating device 35 heats the yarn Y fed from the false twisting device 34 via the feed roller 362.

[0038] A feed roller 361 is provided between the creel stand 20 and the twist stop guide 31, a feed roller 362 is provided between the false twisting device 34 and the second heating device 35, and a feed roller 363 is provided between the second heating device 35 and the winding device 41. Each feed roller 36 (feed rollers 361 to 363) is configured to include a driving roller and a driven roller. Each of the feed rollers 36 is also arranged in a row in the Y direction.

[0039] The conveyance speed of the yarn Y by the feed roller 362 is faster than the conveyance speed of the yarn Y by the feed roller 361, and the yarn Y is stretched between the feed roller 361 and the feed roller 362. The conveyance speed of the yarn Y by the feed roller 363 is slower than the conveyance speed of the yarn Y by the feed roller 362, and the yarn Y is relaxed between the feed roller 362 and the feed roller 363.

[0040] In the processing unit 3 configured as described above, the yarn Y stretched between the feed roller 361 and the feed roller 362 is twisted by the false-twist device 34. The twist formed by the false-twist device 34 propagates up to the twist stopper guide 31, but does not propagate upstream of the twist stopper guide 31 in the yarn running direction. The yarn Y to which twist is imparted while being stretched is heated by the first heating device 32 for heat setting, and then cooled by the cooling device 33. Downstream from the false-twist device 34, the yarn Y is untwisted, but each filament is maintained in a state of being false-twisted by the above heat setting. The yarn Y is heat-set by the second heating device 35 while being relaxed between the feed roller 362 and the feed roller 363. Finally, the yarn Y sent from the feed roller 363 is wound up by the winding device 41 of the winding unit 4, and a winding package P2 is formed.

[0041] The winding unit 4 includes a winding device 41, a package stocker 42, a doffing device (not shown), and the like. The winding device 41 winds up the yarn Y subjected to false-twist processing in the processing unit 3 to form a winding package P2. The package stocker 42 stores the winding package P2 formed by the winding device 41. The doffing device removes the winding package P2 formed by the winding device 41, transfers the winding package P2 to the package stocker 42, and attaches an empty winding bobbin B2 to the winding device 41.

[0042] The package exchanger 9 collects the yarn supply bobbin B1 from the peg 25 and attaches the yarn supply package P1 to the peg 25. As shown in FIG. 4, the package exchanger 9 travels along the rail 98. The rail 98 is laid on the floor and extends along the Y direction. That is, the package exchanger 9 is provided so as to be able to travel along the Y direction. The package exchanger 9 includes a traveling unit 90, a lifting unit 91, a holding unit 92, an exchanging unit 93, a yarn splicing device 60, and a control unit 94 (see FIG. 6) that controls the operations of these components.

[0043] The traveling unit 90 is provided with wheels for traveling on the rail 98, a drive mechanism, and the like. The traveling unit 90 supports the lifting unit 91, the holding unit 92, and the exchanging unit 93. The lifting unit 91 allows an operator to board and move up and down. The lifting unit 91 is used during maintenance and the like. The lifting unit 91 includes a workbench 911 on which the operator boards, a guide portion 912 that supports the workbench 911 so as to be movable in the Z direction, and a drive mechanism (not shown) that drives the workbench.

[0044] The holding unit 92 holds a plurality (for example, four) of yarn supply packages P1. The holding unit 92 receives the supply of the yarn supply package P1 from a package replenishing device (not shown), temporarily stores the yarn supply package P1, and supplies the yarn supply package P1 to the exchanging unit 93. The holding unit 92 is provided so as to be rotatable within a range of approximately 90°. More specifically, the holding unit 92 is provided so as to be rotatable between a replenishing position where it receives the supply of the yarn supply package P1 from the package replenishing device and a supply position (the position shown in FIG. 4) where it supplies the yarn supply package P1 to the exchanging unit 93.

[0045] The exchanging unit 93 exchanges the yarn supply bobbin B1 and the yarn supply package P1 at the peg 25. Specifically, the exchanging unit 93 collects the yarn supply bobbin B1 (see FIG. 1) from the peg 25 and attaches the yarn supply package P1 to the peg 25. The exchanging unit 93 is provided adjacent to the holding unit 92. As shown in FIG. 5, the exchanging unit 93 includes a base 931, a rotating device 932, a collecting device 933, a supplying device 934, and a turntable 936. In FIG. 4, the description of the rotating device 932, the collecting device 933, the supplying device 934, the turntable 936, the yarn splicing device 60, and the knot releasing device 70 is omitted.

[0046] The base 931 supports a rotating device 932, a rotating table 936 that supports a collecting device 933, a supply device 934, and a yarn splicing device 60. The base 931 is provided so as to be movable up and down along the Z direction. The rotating device 932 is fixed to the base 931. The rotating device 932 rotates the peg 25 of the creel stand 20. The rotating device 932 has a rotation driver 932A and a rotation arm 932B.

[0047] The rotation driver 932A is a Geneva driver that constitutes a Geneva mechanism. The rotation driver 932A rotates by the rotational drive of a motor (not shown). The rotation arm 932B supports the rotation driver 932A. The rotation arm 932B is provided so as 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 rotating device 932 is provided so as to correspond to one peg 25 and the other peg 25 provided in a pair in the creel stand 20, respectively.

[0048] When attaching the supply package P1 to the peg 25, the rotating device 932 rotates the peg 25 to change the orientation of the peg 25. More specifically, the rotating device 932 swings the rotation arm 932B to engage the rotation driver 932A with the peg 25. When the rotation driver 932A and the peg 25 are engaged, the rotating device 932 rotates the rotation driver 932A in one direction. As a result, the peg 25 rotates.

[0049] The collecting device 933 is provided on a rotating table 936 rotatably supported by the base 931. The collecting device 933 collects the supply bobbin B1 from the peg 25. The collecting device 933 has a supply bobbin support portion 933A that supports the supply bobbin B1. The collecting device 933 supports the supply bobbin B1 by advancing the supply bobbin support portion 933A in a state where the supply bobbin B1 is not supported with respect to the peg 25, and collects the supply bobbin B1 from the peg 25 by retracting the supply bobbin support portion 933A in a state where the supply bobbin B1 is supported with respect to the peg 25.

[0050] The supply device 934 is provided on a turntable 936 rotatably supported by a base 931. The supply device 934 supplies the yarn supply package P1 to the peg 25. The supply device 934 has a yarn supply package supply unit 934A that supports the yarn supply package P1. The supply device 934 attaches the yarn supply package P1 to the peg 25 by advancing the yarn supply package supply unit 934A while supporting the yarn supply package P1 with respect to the peg 25, and supplies the yarn supply package P1 to the peg 25 by retracting the yarn supply package supply unit 934A while not supporting the yarn supply package P1 with respect to the peg 25.

[0051] In addition to recovering the yarn supply bobbin B1 from the above-described peg 25 and attaching the yarn supply package P1 to the peg 25, the package exchange device 9 unwinds the knot KN of the yarn supply package P1 (knot release process), and connects the yarn ends of the pair of yarn supply packages P1, P1 mounted on the pair of pegs 25, 25 of the creel stand 20 (yarn splicing process). The knot release process and the yarn splicing process are executed by a yarn splicing device 9A. The yarn splicing device 9A includes a yarn splicing device 60, a knot release device 70, and a control unit 94.

[0052] The yarn splicing device 60 is provided on a turntable 936 rotatably supported by a base 931. The yarn splicing device 60 splices the first yarn end Y1 of the yarn supply package P1 supported by one peg 25 and the second yarn end of the yarn supply package P1 supported by the other peg 25, or splices the second yarn end of the yarn supply package P1 supported by one peg 25 and the first yarn end Y1 of the yarn supply package P1 supported by the other peg 25. Hereinafter, the yarn supply package P1 supported (mounted) on one peg 25 is also referred to as a first yarn supply package (first yarn package) P11, and the yarn supply package P1 supported (mounted) on the other peg 25 is also referred to as a second yarn supply package (second yarn package) P12.

[0053] Note that the peg 25 on which the first yarn supply package P11 is mounted constitutes the first mounting portion, and the peg 25 on which the second yarn supply package P12 is mounted constitutes the second mounting portion. The yarn splicing device 60 constitutes a yarn splicing portion for connecting the first yarn end Y1 of the first yarn supply package P11 and the second yarn end of the second yarn supply package P12, or for connecting the second yarn end of the first yarn supply package P11 and the first yarn end Y1 of the second yarn supply package P12.

[0054] The turntable 936 is rotated so that the bobbin support portion 933A is positioned in front of the peg 25 targeted when recovering the yarn supply bobbin B1. Also, the turntable 936 is rotated so that the yarn supply package supply portion 934A is positioned in front of the peg 25 targeted when supplying the yarn supply package P1. Further, the turntable 936 is rotated so that it is positioned in front of the peg 25 targeted when performing the yarn splicing process of the yarn Y by the yarn splicing device 60.

[0055] As shown in FIGS. 7 to 10, the knot release device 70 includes a suction gun (yarn capture portion) 71, a receiving portion 72, an air cylinder (guide portion) 73, and a yarn hanging robot (yarn capture portion moving portion) 74. The suction gun 71 captures (hereinafter, also simply referred to as "suction capture") by sucking the first yarn end Y1 which is the end of the wound yarn portion. The suction gun 71 is provided at the tip of the yarn hanging robot 74. The suction gun 71 has a suction arm 711 and a suction mouse 712.

[0056] The suction arm 711 is connected to a suction hose 713 leading to a negative pressure source, thereby generating a suction flow in the suction gun 71. The proximal end side of the suction arm 711 is connected to the thread hanging robot 74. The suction nozzle 712 is provided at the tip of the suction arm 711. The suction nozzle 712 sucks the yarn Y. The tip surface of the suction nozzle 712 is formed in a hemispherical shape. The suction nozzle 712 is connected to the suction arm 711 via a shaft portion and is elastically movable with respect to the suction arm 711 in the axial direction by a spring or the like. The suction gun 71 is connected to a control unit 94 (see FIG. 6), and the execution and stop of suction capture are controlled by the control unit 94.

[0057] As shown in FIGS. 7 to 9 and FIG. 11, the receiving portion 72 contacts the suction gun 71 so as to sandwich the first yarn end Y1 captured by the suction gun 71 between the receiving portion 72 and the suction gun 71. Specifically, the receiving portion 72 contacts the tip side of the suction nozzle 712 so as to sandwich the first yarn end Y1 sucked and captured by the suction nozzle 712 between the receiving portion 72 and the tip side of the suction nozzle 712.

[0058] The receiving portion 72 has an elastic member 721 in which a concave portion 721h is formed. The inner surface of the concave portion 721h includes a tapered surface that slopes inward as it goes toward the bottom side. The concave portion 721h here has a concave shape that is recessed in a hemispherical shape corresponding to the tip side of the suction nozzle 712. The elastic member 721 is formed of, for example, urethane rubber or the like. The receiving portion 72 is located on the lower side in the vertical direction with respect to the center of the yarn supply package P1 (one side in the direction orthogonal to the axial direction of the yarn supply package P1). The receiving portion 72 includes a first receiving portion 72A that contacts the suction gun 71 so as to sandwich the first yarn end Y1 of the first yarn supply package P11 between the receiving portion 72 and the suction gun 71, and a second receiving portion 72B that contacts the suction gun 71 so as to sandwich the first yarn end Y1 of the second yarn supply package P12 between the receiving portion 72 and the suction gun 71. For example, the first receiving portion 72A is disposed at one end side in the Y direction in the exchange unit 93, and the second receiving portion 72B is disposed at the other end side in the Y direction in the exchange unit 93.

[0059] The air cylinder 73 guides the receiving part 72 from the first position to the second position in a direction away from the yarn supply package P1. The air cylinder 73 includes a piston rod 731 provided with the receiving part 72 on the tip side, and a cylinder tube 732 into which the piston rod 731 is inserted. The air cylinder 73 has a throttle (not shown) for restricting the exhaust of air. The air cylinder 73 is connected to the control unit 94, and the supply of air to the air cylinder 73 is controlled by the control unit 94. The throttle of the air cylinder 73 can be realized, for example, by providing a throttle valve on the exhaust side.

[0060] The piston rod 731 has, for example, a rod shape with a circular cross-section. The tip of the piston rod 731 is fixed to the end of the receiving part 72 on the side opposite to the recess 721h. The piston rod 731 is arranged to be inclined with respect to the horizontal direction such that the tip side in the axial direction is higher than the base end side. The piston rod 731 is arranged to be inclined so as to be located inside in the Y direction as it goes toward the tip side. The center of the recess 721h of the receiving part 72 is located on the axis of the piston rod 731. The cylinder tube 732 has, for example, a cylindrical shape. The cylinder tube 732 is supported by the frame 93F of the replacement unit 93 via a bracket BR1.

[0061] Such an air cylinder 73, for example, extends the piston rod 731 when air is supplied, and the receiving part 72 is located at the first position (see Fig. 15(a)). In this state, the throttle acts as a resistance and prevents the exhaust of air from the air cylinder 73. As a result, a biasing force is generated to bias the receiving part 72 from the second position toward the first position, and the receiving part 72 is held at the first position. When the receiving part 72 is pushed against the biasing force toward the cylinder tube 732 side, the piston rod 731 contracts, and the receiving part 72 moves to the second position in a direction away from the yarn supply package P1 along the axial direction of the piston rod 731 (see Fig. 15(c)). Note that the throttle that restricts the exhaust of air in the air cylinder 73 constitutes a biasing and holding means that biases the receiving part 72 from the second position toward the first position and holds it at the first position.

[0062] The first position is a position within a range where the distance from the knot KN is equal to or less than the length from the knot KN to the first yarn end Y1. The first position is the position of the receiving part 72 when the piston rod 731 of the air cylinder 73 is in the most extended state. The second position is a position farther from the yarn supply package P1 than the first position. For example, the second position is, for example, 100 mm or more away from the first position. The second position is the position of the receiving part 72 when the piston rod 731 of the air cylinder 73 is in the most contracted state. Also, the second position is a position within the range between one end and the other end of the yarn supply package P1 in the width direction of the yarn supply package P1 in a state where the peg 25 is operated and the end face of the adapter 8 faces the suction gun 71 side.

[0063] The air cylinder 73 includes a first air cylinder (first guiding part) 73A that guides the first receiving part 72A in a direction away from the first yarn supply package P11, and a second air cylinder (second guiding part) 73B that guides the second receiving part 72B in a direction away from the second yarn supply package P12. The first position of the second receiving part 72B is lower than the first position of the first receiving part 72A. The second position of the second receiving part 72B is lower than the second position of the first receiving part 72A. The first air cylinder 73A is arranged on one end side in the Y direction in the exchange unit 93, and the second air cylinder 73B is arranged on the other end side in the Y direction in the exchange unit 93.

[0064] As shown in FIGS. 7 to 10, the thread hanging robot 74 moves the suction gun 71. The thread hanging robot 74 is connected to the proximal end side of the suction gun 71. The thread hanging robot 74 is configured to include a link mechanism and a plurality of motors. The thread hanging robot 74 is supported by the frame 93F of the exchange unit 93 via a bracket BR2. The thread hanging robot 74 is arranged at the central portion of the exchange unit 93 in the Y direction. The thread hanging robot 74 is located between the first receiving part 72A and the second receiving part 72B in the Y direction. The thread hanging robot 74 is not particularly limited, and various known robot arms can be used.

[0065] The thread hanging robot 74 is connected to the control unit 94. The thread hanging robot 74 executes a knot releasing process under the control of the control unit 94. That is, the thread hanging robot 74 brings the suction mouse 712 of the suction gun 71 into contact with the receiving part 72 at the first position, and while keeping the suction mouse 712 and the receiving part 72 in contact, moves the suction mouse 712 to the second position in a direction away from the yarn supply package P1 while guiding the receiving part 72 by the air cylinder 73.

[0066] Specifically, the thread - hanging robot 74 contacts the suction mouse 712 with the first receiving part 72A at the first position corresponding to the first receiving part 72A, and while keeping the suction mouse 712 and the first receiving part 72A in contact, the first air cylinder 73A guides the first receiving part 72A and moves the suction mouse 712 from the first yarn supply package P11 in a direction away from it to the second position corresponding to the first receiving part 72A. The thread - hanging robot 74 contacts the suction mouse 712 with the second receiving part 72B at the first position corresponding to the second receiving part 72B, and while keeping the suction mouse 712 and the second receiving part 72B in contact, the second air cylinder 73B guides the second receiving part 72B and moves the suction mouse 712 from the second yarn supply package P12 in a direction away from it to the second position corresponding to the second receiving part 72B.

[0067] As shown in FIG. 6, the control unit 94 is an electronic control unit composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), I / O ports, communication ports, etc. Programs for controlling each part of the traveling unit 90, the lifting unit 91, the holding unit 92, and the exchanging unit 93 are recorded in the ROM. Each function in the control unit 94 is executed under the control of the CPU by loading a predetermined computer software onto hardware such as the CPU and the main memory unit. The control unit 94 controls at least the suction gun 71, the air cylinder 73, and the thread - hanging robot 74 to execute the knot - releasing process. The control unit 94 controls at least the suction gun 71, the thread - hanging robot 74, and the yarn splicing device 60 to execute the yarn - splicing process.

[0068] Next, a series of operations including the knot - releasing process in the yarn - splicing device 9A will be described in detail.

[0069] 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 supply package P11 when splicing the first yarn end Y1 of the first supply package P11 and the second yarn end of the second supply package P12 will be described with reference to FIGS. 12 to 16. Here, the first supply package P11 is a newly introduced full package, and the second supply package P12 is a package during unwinding.

[0070] As shown in FIG. 12, in the initial state, for example, the peg 25 is not operated by a peg rotating device (not shown) of the splicing device 60, the first supply package P11 has not rotated yet, and the end face of the adapter 8 faces the side opposite to the suction gun 71 side. Air is not supplied to the first air cylinder 73A, the piston rod 731 is contracted, and the first receiving portion 72A is located at the second position.

[0071] In such an initial state, as shown in FIG. 13, first, the peg 25 is operated to rotate the first supply package P11 so that the end face of the adapter 8 faces the suction gun 71 side. The control unit 94 controls the yarn hanging robot 74 to move the suction mouth 712 of the suction gun 71 and bring the suction mouth 712 into contact with the suction port of the holding hole portion 81 where the first yarn end Y1 is held in the adapter 8. At the same time, the control unit 94 starts the suction of the suction gun 71, and the first yarn end Y1 is suction-captured by the suction mouth 712. Further, the control unit 94 supplies air to the first air cylinder 73A to extend the piston rod 731 and position the first receiving portion 72A at the first position.

[0072] Subsequently, as shown in FIG. 14, the control unit 94 controls the thread - hanging robot 74 to move the suction mouse 712 that has sucked and captured the first thread end Y1, and brings the suction mouse 712 into contact with the recess 721h of the first receiving part 72A, and clamps the first thread end Y1 between them. In this state, as shown in FIG. 15(a), the control unit 94 controls the thread - hanging robot 74, and pushes the suction mouse 712 against the recess 721h of the first receiving part 72A along the axial direction of the piston rod 731 against the biasing force of the first air cylinder 73A. As a result, as shown in FIG. 15(b), the piston rod 731 contracts, and the suction mouse 712 and the first receiving part 72A move away from the first yarn supply package P11 along the axial direction of the piston rod 731 while being guided by the first air cylinder 73A in a state of being in contact with each other.

[0073] Then, the control unit 94 controls the thread - hanging robot 74 to continuously push the suction mouse 712 against the first receiving part 72A. As a result, as shown in FIG. 15(c), the piston rod 731 further contracts, and the suction mouse 712 and the first receiving part 72A move to the second position along the axial direction of the piston rod 731 away from the first yarn supply package P11 while being guided by the first air cylinder 73A in a state of being in contact with each other. As a result of the above, as shown in FIG. 16, the first thread end Y1 can be strongly pulled away from the first yarn supply package P11 from the position of the first position PA to the second position PB of the first receiving part 72A. As a result, the knot KN including the slip knot of the first yarn supply package P11 is untied.

[0074] Thereafter, the control unit 94 controls the yarn threading robot 74 to move the suction mouth 712, which has suctioned and captured the first yarn end Y1, to the yarn joining device 60, and then stops the suction of the suction mouth 712 to release the suction and capture, and sets (guides) the first yarn end Y1 to the yarn joining device 60. The control unit 94 also controls the suction gun 71 and the yarn threading robot 74 to cause the suction mouth 712 to suction and capture the second yarn end of the second yarn supply package P12, and then moves the suction mouth 712 to the yarn joining device 60, and then stops the suction of the suction mouth 712 to release the suction and capture, and sets the second yarn end of the second yarn supply package P12 to the yarn joining device 60. Then, the control unit 94 controls the yarn joining device 60 to splice (connect) the first yarn end Y1 of the first yarn supply package P11 and the second yarn end of the second yarn supply package P12.

[0075] 12 to 15, when splicing the first yarn end Y1 of the newly input second yarn supply package P12 with the second yarn end of the first yarn supply package P11 being unwound, the knot KN provided on the outer peripheral surface of the yarn layer YL of the second yarn supply package P12 is released. In this case, as shown in Fig. 17, the first yarn end Y1 can be strongly pulled in the direction away from the second yarn supply package P12 from the first position PA to the second position PB of the second receiving portion 72B, and the knot KN including the slip knot of the second yarn supply package P12 can be released.

[0076] In the knot releasing device 70 described above, by bringing the suction gun 71 that has captured the first yarn end Y1 into contact with the receiving part 72, the yarn Y can be sandwiched between them. Then, in this state, by guiding the receiving part 72 with the air cylinder 73, the first yarn end Y1 is strongly pulled in a direction away from the supply package P1 (the first yarn end Y1 is pulled in a clamped state), and the knot KN including the slip knot can be untied. Therefore, according to the knot releasing device 70, it is not necessary to supply a large amount of compressed fluid that generates a negative pressure for strongly pulling the yarn Y to the suction gun 71, and it is possible to release the knot KN including the slip knot of the supply package P1 without providing a yarn clamping mechanism for sandwiching the yarn Y in the suction gun 71.

[0077] In the knot releasing device 70, the first position is a position within a range where the distance from the knot KN is less than or equal to the length from the knot KN to the first yarn end Y1. In this case, it becomes possible to surely bring the suction gun 71 in a state where it has captured the end yarn portion of the winding end of the yarn layer YL in the supply package P1 into contact with the receiving part 72. Also, the second position is a position within the range between one end and the other end of the supply package P1 in the width direction of the supply package P1. In this case, when guiding the receiving part 72 with the air cylinder 73 and strongly pulling the first yarn end Y1 in a direction away from the supply package P1, it is possible to suppress the end yarn portion of the winding end of the yarn layer YL wound around the supply bobbin B1 from moving in the width direction of the supply package P1 until it comes off the supply bobbin B1.

[0078] In the knot releasing device 70, the air cylinder 73 biases the receiving part 72 from the second position toward the first position and holds it at the first position. In this case, the suction gun 71 and the receiving part 72 will be in close contact, and the yarn Y can be surely sandwiched.

[0079] In the knot releasing device 70, the receiving portion 72 has an elastic member 721 in which a recess 721h is formed, and the inner surface of the recess 721h includes a tapered surface that slopes inward as it goes toward the bottom side. Thereby, when the suction gun 71 that has captured the first yarn end Y1 is brought into contact with the receiving portion 72, it becomes possible to reliably sandwich the yarn Y between them.

[0080] In the knot releasing device 70, the suction gun 71 is provided at the tip of the yarn hanging robot 74. Thereby, it becomes easy for the yarn hanging robot 74 to operate the suction gun 71.

[0081] In the knot releasing device 70, the knot KN is located on one side with respect to the center of the yarn supply package P1 in a direction orthogonal to the axial direction of the yarn supply package P1. The receiving portion 72 is located on the same one side as the knot KN with respect to the center of the yarn supply package P1. In this case, the first yarn end Y1 can be efficiently guided in a direction away from the yarn supply package P1.

[0082] In the knot releasing device 70, the yarn supply package P1 includes a first yarn supply package P11 and a second yarn supply package P12, the receiving part 72 includes a first receiving part 72A and a second receiving part 72B, and the air cylinder 73 includes a first air cylinder 73A and a second air cylinder 73B. The yarn hanging robot 74 contacts the suction gun 71 with the first receiving part 72A at the first position corresponding to the first receiving part 72A, and while the suction gun 71 and the first receiving part 72A are in contact, the first receiving part 72A is guided by the first air cylinder 73A, and the suction gun 71 is moved in a direction away from the yarn supply package P1 to the second position corresponding to the first receiving part 72A. Further, the yarn hanging robot 74 contacts the suction gun 71 with the second receiving part 72B at the first position corresponding to the second receiving part 72B, and while the suction gun 71 and the second receiving part 72B are in contact, the second receiving part 72B is guided by the second air cylinder 73B, and the suction gun 71 is moved in a direction away from the yarn supply package P1 to the second position corresponding to the second receiving part 72B. According to such a configuration, it is possible to cope with the release of the knot KN including the slip knot of the yarn supply package P1 for each of the two yarn supply packages P1.

[0083] Since the yarn splicing processing device 9A and the yarn supply device 100 are provided with the knot releasing device 70, similarly to the above, it is not necessary to supply a large amount of compressed fluid that generates a negative pressure for strongly pulling the yarn Y to the suction gun 71, and it is possible to release the knot KN including the slip knot of the yarn supply package P1 without providing a yarn clamping mechanism for clamping the yarn Y to the suction gun 71.

[0084] In this embodiment, while the suction gun 71 that has captured the first yarn end Y1 is in contact with the receiving portion 72 and sandwiching the yarn Y, the supply package P1 may be rotated so that tension acts on the yarn portion at the end of winding of the yarn layer YL of the supply package P1, or the supply package P1 may not be rotated. When the supply package P1 is not rotated, it is possible to save the consumed energy. Also, in this embodiment, while the suction gun 71 that has captured the first yarn end Y1 is in contact with the receiving portion 72 and sandwiching the yarn Y, the suction by the suction gun 71 may be continued, or the suction may be stopped. When the suction by the suction gun 71 is stopped, it is possible to save the consumed energy.

[0085] As described above, the embodiments of one aspect of the present invention have been explained. However, one aspect of the present invention is not necessarily limited to the above embodiments, and various modifications are possible without departing from the gist thereof.

[0086] In the above embodiment, an example has been described in which the control unit 94 that comprehensively controls the traveling unit 90, the elevating unit 91, the holding unit 92, the exchanging unit 93, and the yarn splicing device 60 of the package exchanging device 9 controls the knot releasing device 70, but it is not limited thereto. The control unit 94 may be provided dedicatedly for controlling the knot releasing device 70. Also, the control unit 94 may be provided communicably by wire or wirelessly at a position away from the package exchanging device 9 instead of being provided in the package exchanging device 9.

[0087] In the above-described embodiments and the above-described modified examples, the magnetic force of a magnet may be used for the contact between the suction mouse 712 of the suction gun 71 and the receiving portion 72. In the above-described embodiments and the above-described modified examples, the receiving portion 72 is urged from the second position toward the first position by restricting the exhaust of the air cylinder 73, but the present invention is not limited to this, and the elastic force of a spring and the magnetic force of a magnet may be used to urge the receiving portion 72 from the second position toward the first position. In the above-described embodiments and the above-described modified examples, the false twisting machine 1 is described as an example of a yarn processing device, but the present invention is not limited to this. That is, although a device that performs twisting (false twisting) is described as an example of the processing unit 3, the present invention may be applied to a device that performs untwisted yarn processing (air jet processing).

[0088] In the air cylinder 73 of the above-described embodiments and the above-described modified examples, in order to smooth the movement when the piston rod 731 is extended and the receiving portion 72 is moved (advanced) in a direction approaching the yarn supply package P1, the exhaust restriction may be configured to be one-way. In the air cylinder 73 of the above-described embodiments and the above-described modified examples, when the receiving portion 72 is moved in a direction away from the yarn supply package P1 and is located in the second position, since air escapes from the air cylinder 73, the resistance (biasing force) may not be maintained. In the air cylinder 73 of the above-described embodiments and the above-described modified examples, the biasing force may be used to sandwich the first yarn end Y1 between the receiving portion 72 and the suction gun 71 only while the suction mouse 712 is being pushed into the receiving portion 72 and the receiving portion 72 is moving.

Description of Reference Numerals

[0089] 9A... Thread splicing processing device, 20... Creel stand (yarn supply stand), 25... Peg (first mounting part, second mounting part), 60... Thread splicing device (thread splicing part), 70... Knot release device (knot release device for yarn package), 71... Suction gun (yarn catching part), 72... Receiving part, 72A... First receiving part, 72B... Second receiving part, 73... Air cylinder (guide part), 73A... First air cylinder (first guide part), 73B... Second air cylinder (second guide part), 74... Yarn hanging robot (yarn catching part moving part), 100... Yarn supply device, 721... Elastic member, 721h... Concave part, B1... Yarn supply bobbin (bobbin), KN... Knot, PA... First position, PB... Second position, P1... Yarn package (yarn package), P11... First yarn package (first yarn package), P12... Second yarn package (second yarn package), Y... Yarn, YL... Yarn layer, Y1... First yarn end (end of the wound yarn part, outer layer side yarn end).

Claims

1. An apparatus for untying a knot that secures the end of a thread layer formed by winding a thread around a bobbin to the outer peripheral surface of the thread package with a knot including a slip knot, the apparatus comprising: a thread catching part that catches the end of the thread at the end of winding by sucking it; a receiving part that contacts the thread catching part and sandwiches the end of the thread at the end of winding caught by the thread catching part between the receiving part and the thread catching part; a guiding part that guides the receiving part from a first position to a second position in a direction away from the thread package; a thread catching part moving part that contacts the thread catching part with the receiving part at the first position, and while guiding the receiving part by the guiding part in a state where the thread catching part and the receiving part are in contact with each other, moves the thread catching part in a direction away from the thread package to the second position. An apparatus for untying a knot of a thread package.

2. The apparatus for untying a knot of a thread package according to claim 1, wherein the first position is a position within a range where the distance from the knot is equal to or less than the length from the knot to the end of the thread at the end of winding.

3. The apparatus for untying a knot of a thread package according to claim 1 or 2, wherein the second position is a position within a range between one end and the other end of the thread package in the width direction of the thread package.

4. The apparatus for untying a knot of a thread package according to any one of claims 1 to 3, wherein the guiding part has a biasing and holding means that biases the receiving part from the second position toward the first position and holds it at the first position.

5. The receiving part has an elastic member in which a recess is formed, The apparatus for untying a knot of a thread package according to any one of claims 1 to 4, wherein the inner surface of the recess includes a tapered surface that inclines inward as it goes toward the bottom side.

6. The apparatus for untying a knot of a thread package according to any one of claims 1 to 5, wherein the thread catching part is provided at the tip of the thread catching part moving part.

7. The knot is located on one side with respect to the center of the thread package in a direction orthogonal to the axial direction of the thread package, The apparatus for untying a knot of a thread package according to any one of claims 1 to 6, wherein the receiving part is located on the same one side as the knot with respect to the center of the thread package.

8. The thread package includes a first thread package and a second thread package, The receiving part is A first receiving portion that contacts the yarn catching portion so as to sandwich an end of the yarn portion at the end of winding of the first yarn package between the yarn catching portion; A second receiving portion that contacts the yarn catching portion so as to sandwich an end of the yarn portion at the end of winding of the second yarn package between the yarn catching portion; The guide portion includes: A first guide portion that guides the first receiving portion in a direction away from the yarn package; A second guide portion that guides the second receiving portion in a direction away from the yarn package; The yarn catching portion moving portion includes: The yarn catching portion is brought into contact with the first receiving portion at the first position corresponding to the first receiving portion, and while the yarn catching portion and the first receiving portion are in contact, the first receiving portion is guided by the first guide portion, and the yarn catching portion is moved in a direction away from the yarn package to the second position corresponding to the first receiving portion; The yarn catching portion is brought into contact with the second receiving portion at the first position corresponding to the second receiving portion, and while the yarn catching portion and the second receiving portion are in contact, the second receiving portion is guided by the second guide portion, and the yarn catching portion is moved in a direction away from the yarn package to the second position corresponding to the second receiving portion. The knot releasing device for a yarn package according to any one of claims 1 to 7.

9. The knot releasing device for a yarn package according to claim 8; A yarn splicing portion for connecting the yarn end on the outer layer side of the first yarn package and the yarn end on the inner layer side of the second yarn package, or for connecting the yarn end on the inner layer side of the first yarn package and the yarn end on the outer layer side of the second yarn package. A yarn splicing processing device.

10. A yarn supply stand having a first mounting portion on which the first yarn package is mounted and a second mounting portion on which the second yarn package is mounted; The knot releasing device for a yarn package according to claim 8; A yarn supply device including a yarn splicing portion for connecting the yarn end on the outer layer side of the first yarn package and the yarn end on the inner layer side of the second yarn package, or for connecting the yarn end on the inner layer side of the first yarn package and the yarn end on the outer layer side of the second yarn package.

Images