Connecting member and threading method

Abstract

To reliably catch yarn without loosening when the yarn is hooked on a winding bobbin mounted on a connection member.SOLUTION: A connection member 60 is constituted so as to arrange two winding bobbins B2a, B2b for winding up a traveling yarn Y, in a predetermined axial direction to connect them. The connection member 60 comprises: a base part 61 disposed so as to be sandwiched between the two winding bobbins B2a, B2b arranged in the axial direction; and a pair of mounting parts 62 which are disposed on both sides in the axial direction of the base part 61 and enable the two winding bobbins B2a, B2b to be mounted thereto. The base part 61 includes: a pair of stopper parts 66 disposed between the pair of mounting parts 62 in the axial direction; a guiding surface 73 which is disposed between the pair of stopper parts 66 in the axial direction to guide the traveling yarn Y (yarn Yb) to the inside in the radial direction of the base part 61; and a catching claw 72 for catching the yarn guided inside in the radial direction by the guiding surface 73.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a connecting member for connecting a plurality of winding bobbins for winding yarn thereon, and a yarn threading method. [Background technology]

[0002] The winding devices disclosed in Patent Documents 1 and 2 are configured to be able to switch the number of yarns that can be simultaneously wound around a paper tube (winding bobbin) held by a bobbin holder. The bobbin holder can, for example, attach and detach two winding bobbins (hereinafter referred to as winding bodies) connected in the axial direction of the winding bobbins by a connecting member. This allows the winding device to wind two yarns around the winding bodies. The end of one of the two yarns can be held, for example, by being sandwiched in the gap between the end face of one of the winding bobbins and the bobbin holder. The end of the other of the two yarns can be held, for example, by being sandwiched in the gap between the end face of the other winding bobbin and the connecting member.

[0003] When two yarns are wound on the winding body in a winding device, the two yarns supplied from the upstream side in the yarn running direction are sucked and held by, for example, two suction mouths. The two running yarns are pulled radially inward toward the boundary between the rotating winding bobbin and the bobbin holder (or connecting member) by an operator or an automatic threading device described in Patent Document 2. When the yarns are caught in the gap between the winding bobbin and the bobbin holder (or connecting member), the portion of the yarn upstream of the winding body in the yarn running direction is wound and held near the gap. Furthermore, the portion of the yarn downstream of the winding body in the yarn running direction is naturally cut due to, for example, tension and is sucked and removed by the suction mouths. In this way, the end of the yarn is held in the gap between the winding bobbin and the bobbin holder (or connecting member), allowing the winding of the yarn onto the winding body to begin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-35640 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-23385 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, as it has become possible to produce thinner yarns than before, the following problem has become apparent when capturing the yarn in the gap between the winding bobbin and the connecting member. Even if a thin yarn is caught in the gap between the winding bobbin and the connecting member, it is difficult to firmly grip the thin yarn in the gap and it is prone to falling out of the gap. In such a situation, the running yarn may become unstable, fluctuating between tension and slack. If the slack in the yarn propagates upstream in the yarn running direction, the yarn located upstream in the yarn running direction may not be able to run normally. Furthermore, there is a risk that the thin yarn will not be captured in the gap between the winding bobbin and the connecting member in the first place, resulting in failed threading.

[0006] An object of the present invention is to reliably catch a yarn without slackening it when threading the yarn onto a winding bobbin attached to a connecting member. [Means for solving the problem]

[0007] The connecting member of the first invention is a connecting member configured to connect two winding bobbins for winding a running yarn in a predetermined axial direction, and includes a base portion arranged to be sandwiched between the two winding bobbins arranged in the axial direction, and a pair of mounting portions arranged on both sides of the base portion in the axial direction and configured to allow the two winding bobbins to be mounted thereon, and the base portion is a pair of stopper portions that are disposed between the pair of mounting portions in the axial direction and that restrict movement of the two winding bobbins in the axial direction; and a pair of stopper portions that are disposed between the pair of stopper portions in the axial direction, The yarn conveyor is characterized by having a guide surface that guides the running yarn radially inward of the base portion, and a capturing claw that captures the yarn guided radially inward by the guide surface.

[0008] For convenience of explanation, the structure formed by connecting two winding bobbins and a connecting member is referred to as a winding body. In the present invention, the running yarn is brought close to the rotating winding body, and the catching claws of the connecting member are then hooked onto the yarn, thereby allowing the yarn to be reliably caught by being entangled in the catching claws. If resistance is unintentionally applied to the yarn by other parts of the connecting member before the yarn reaches the catching claws, the yarn may not run smoothly and may become slack. In this regard, in the present invention, the guide surfaces can smoothly guide the yarn radially inward. Therefore, the yarn can be allowed to reach the catching claws while preventing unintentional resistance from being applied to the yarn. Therefore, the yarn can be reliably caught without slackening.

[0009] The connecting member of the second invention is characterized in that, in the first invention, the capturing claw has a receiving surface formed to face at least one side in the circumferential direction of the base portion, and a protrusion that protrudes further than the receiving surface toward at least one side in the circumferential direction, preventing the thread received by the receiving surface from falling off while running.

[0010] In the present invention, when the winding body rotates to one side in the circumferential direction, the yarn can be caught by receiving it on the receiving surface. Here, the receiving surface simply receives the yarn, and does not, for example, pinch and hold the yarn. In other words, at least the yarn immediately after being received by the receiving surface can slide relative to the receiving surface. This prevents the yarn from falling into an unstable state where it becomes taut or slack due to the catching claws. Furthermore, the protrusions prevent the yarn received by the receiving surface from moving radially outward and falling off the base. Therefore, the yarn can be stably caught and held while it is running.

[0011] The connecting member of the third invention is characterized in that, in the first or second invention, the base portion has a guide slit formed by the guide surface and an opposing surface arranged to face the guide surface in the axial direction.

[0012] In the present invention, the guide slits can reliably and stably guide the yarn radially inward.

[0013] The connecting member of the fourth invention is characterized in that, in any of the first to third inventions, the guide surface faces at least one side in the axial direction, the capturing claw is arranged on the other side of the guide surface in the axial direction and protrudes at least to one side in the circumferential direction of the base portion, and the base portion has a preliminary guide surface facing at least the other side in the axial direction and capable of guiding the running yarn inward in the radial direction, and a preliminary capturing claw arranged on one side of the guide surface in the axial direction and protruding at least to the other side in the circumferential direction.

[0014] In the present invention, the axial direction and Parallel When the connecting member is rotated 180 degrees in a plane, the auxiliary guide surface can function as a guide surface, and the auxiliary catch claw can function as a catch claw. This allows the yarn to be caught properly even if the winding body is attached to the yarn winding device in the opposite direction to the normal direction. In other words, there is no need to consider the orientation of the connecting member when attaching the connecting member to the yarn winding device. This reduces the effort that would be required if the orientation of the connecting member had to be considered.

[0015] The connecting member of a fifth invention is the fourth invention, wherein the preliminary capturing claws are arranged at positions different from the capturing claws in the circumferential direction.

[0016] If the catch claws and the preliminary catch claws are arranged in a position where they overlap in whole or in part in the circumferential direction, there is a risk that the base portion will become large in the axial direction. If the catch claws and the preliminary catch claws are made smaller in the axial direction to avoid this, there is a risk that they will fail to catch and / or hold the yarn. In the present invention, the catch claws and the preliminary catch claws can be made large while preventing the base portion from becoming large in the axial direction, compared to when the catch claws and the preliminary catch claws are arranged in a position where they overlap in whole or in part in the circumferential direction. Therefore, it is possible to both prevent the connecting member from becoming large in size and prevent failure to catch and / or hold the yarn.

[0017] The connecting member of the sixth invention is any one of the first to fifth inventions. ,before The guide surface and the capturing claw are disposed radially inward of the outermost ends of the pair of stopper portions in the radial direction.

[0018] If the guide surface and / or the catching claw are positioned radially outward from the stopper portion, the guide surface and / or the catching claw may protrude radially outward from the two bobbins. In such a case, for example, in a yarn winding device, it may be difficult to handle the winding body in the same way as a single long winding bobbin. In the present invention, the guide surface and the catching claw are positioned radially inward from the radial outer end of the stopper portion. Therefore, by attaching two winding bobbins having an outer diameter equal to or larger than the outer diameter of the pair of stopper portions to the connecting member, the winding body can be handled in the same way as a single winding bobbin.

[0019] The connecting member of the seventh invention is the sixth invention, wherein one of the pair of stopper portions is connected to the guide surface and has an inclined surface formed so that the outer diameter becomes smaller as it approaches the guide surface in the axial direction.

[0020] In the present invention, the running yarn can be smoothly guided to the guide surface by the inclined surface.

[0021] The threading method of the eighth invention is a threading method for threading multiple running threads onto a winding body having a connecting member of any of the first to seventh inventions and two winding bobbins attached to the connecting member, characterized in that while rotating the winding body, one thread of the multiple threads is guided radially inward by the guide surface and captured by the capturing claw.

[0022] In the present invention, the yarn is caught by the catching claw, so that the yarn can be reliably caught and held without slack, thereby improving the success rate of threading. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a side view of a false twisting machine including a winding device according to an embodiment of the present invention. [Figure 2] FIG. 1 is a schematic diagram showing a false twisting machine laid out along the yarn path. [Figure 3] FIG. 2(a) is an explanatory diagram showing a single winding bobbin and its peripheral configuration, and FIG. 2(b) is an explanatory diagram showing a winding body having two winding bobbins and its peripheral configuration. [Figure 4] 1(a) and 1(b) are schematic diagrams of the threading device and its surroundings. [Figure 5] 5(a) to 5(c) are explanatory diagrams showing the operation of the threading device when threading a thread onto a winding bobbin. [Figure 6] FIG. 2 is a perspective view of a base portion of a connecting member. [Figure 7] 7 is a view taken along arrow VII in FIG. 6, showing the base portion viewed from a direction perpendicular to the axial direction. [Figure 8] 8 is a view taken along arrow VIII in FIG. 6, showing the base portion viewed from a direction perpendicular to the axial direction. [Figure 9] 7, and FIG. 8(b) is an enlarged view of a portion of FIG. [Figure 10] 8(a) is a cross-sectional view taken along line X(a)-X(a) in FIG. 8, and FIG. 8(b) is a cross-sectional view taken along line X(b)-X(b) in FIG. [Figure 11]10(a) to 10(c) are explanatory diagrams showing how a thread is caught by a catching claw. [Figure 12] 10(a) to 10(c) are explanatory diagrams showing how a thread is caught and held by a catching claw. DETAILED DESCRIPTION OF THE INVENTION

[0024] Next, an embodiment of the present invention will be described. The direction perpendicular to the plane of the paper in Fig. 1 is the machine base longitudinal direction, and the left-right direction of the paper is the machine base width direction. The direction perpendicular to both the machine base longitudinal direction and the machine base width direction is the up-down direction (vertical direction) in which gravity acts.

[0025] (Overall configuration of false twisting machine) First, the overall configuration of a false twisting machine 1 having a winding device 21 (described later) of this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a side view of the false twisting machine 1. Figure 2 is a schematic view of the false twisting machine 1 unfolded along the path (yarn path) of the yarn Y.

[0026] The false twisting machine 1 is configured to be able to false twist a yarn Y made of synthetic fibers. The false twisting machine 1 includes a yarn supplying unit 2, a processing unit 3, and a winding unit 4. The yarn supplying unit 2 is configured to be able to supply the yarn Y. The processing unit 3 is configured to pull out the yarn Y from the yarn supplying unit 2 and false twist it. The winding unit 4 is configured to wind the yarn Y processed by the processing unit 3 onto a winding bobbin B1 or a winding body 100 (see Figures 1, 2, and 3(b); details will be described later). The components of the yarn supplying unit 2, processing unit 3, and winding unit 4 are arranged in multiple rows in the machine frame longitudinal direction, perpendicular to the yarn running plane (the plane of the paper in Figure 1) on which the yarn path from the yarn supplying unit 2 through the processing unit 3 to the winding unit 4 is located (see Figure 2).

[0027] The yarn supplying unit 2 has a creel stand 7 that holds multiple yarn supply packages Ps and supplies multiple yarns Y to the processing unit 3. The processing unit 3 is configured to pull out the multiple yarns Y from the yarn supplying unit 2 and process them. The processing unit 3 is configured to include, in order from the upstream side in the yarn running direction, a first feed roller 11, a twist stop guide 12, a first heating device 13, a cooling device 14, a false twist device 15, a second feed roller 16, a doubling device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding unit 4 has multiple winding devices 21. Each winding device 21 winds the yarn Y that has been false twisted in the processing unit 3 onto a winding bobbin B1 or a winding body 100 to form one or multiple winding packages Pw.

[0028] The false twisting machine 1 has a main frame 8 and a winding table 9 that are spaced apart in the width direction of the machine. The main frame 8 and the winding table 9 are arranged so that they extend over approximately the same length in the longitudinal direction of the machine. The main frame 8 and the winding table 9 are arranged so that they face each other in the width direction of the machine. The false twisting machine 1 has a unit called a span, which includes a pair of the main frame 8 and the winding table 9. In one span, various devices are arranged so that multiple yarns Y running side by side in the longitudinal direction of the machine can be false twisted simultaneously. In the false twisting machine 1, these spans are arranged symmetrically on the left and right sides of the drawing, with the center line C of the main frame 8 in the width direction of the machine as the axis of symmetry (the main frame 8 is common to both the left and right spans). In addition, multiple spans are arranged in the longitudinal direction of the machine.

[0029] (Configuration of processing part) The configuration of the processing unit 3 will be described with reference to FIGS. 1 and 2. The first feed roller 11 is configured to unwind the yarn Y from the yarn supply package Ps attached to the yarn supplying unit 2 and feed it to the first heating device 13. The first feed roller 11 is configured to be able to feed, for example, two strands of yarn Y to the first heating device 13, but is not limited to this. The twist stop guide 12 is configured to prevent the twist imparted to the yarn Y by the false twist device 15 from propagating upstream of the twist stop guide 12 in the yarn running direction. The first heating device 13 is configured to heat the yarn Y fed from the first feed roller 11. The first heating device 13 is configured to be able to heat, for example, four strands of yarn Y as shown in FIG. 2, but is not limited to this. The cooling device 14 is configured to cool the yarn Y heated by the first heating device 13. The cooling device 14 is configured to be able to cool, for example, four strands of yarn Y as shown in FIG. 2, but is not limited to this. The false twisting device 15 is disposed downstream of the cooling device 14 in the yarn running direction and is configured to impart a twist to the yarn Y. The false twisting device 15 is, for example, a so-called disk friction type false twisting device, but is not limited to this. The second feed roller 16 is configured to feed the yarn Y processed by the false twisting device 15 to the yarn doubling device 17. The conveying speed of the yarn Y by the second feed roller 16 is faster than the conveying speed of the yarn Y by the first feed roller 11. As a result, the yarn Y is drawn between the first feed roller 11 and the second feed roller 16.

[0030] The spinning device 17 is configured to be able to spin the yarns Ya and Yb together to form the yarn Yc. The spinning device 17 can, for example, spin the yarn Ya processed by a certain false twist device 15 with the yarn Yb processed by a false twist device 15 arranged adjacent to the false twist device 15. The spinning device 17 has two interlace nozzles 31 and 32 (see FIG. 2). The spinning device 17, for example, jets air onto the yarns Ya and Yb (see the left side of the page in FIG. 2) passing through the interlace nozzle 31, and spins the yarns Ya and Yb by air entangling (interlacing) the yarns Ya and Yb with the air flow, thereby forming the yarn Yc. The spinning device 17 can also guide the two yarns Y directly downstream in the yarn running direction without spinning the yarns Ya and Yb together. In this case, the yarn Ya passes through the inside of the interlace nozzle 31, and the yarn Yb passes through the inside of the interlace nozzle 32 (see the right part of the paper in FIG. 2).

[0031] The third feed roller 18 is configured to feed the yarn Y traveling downstream of the doubling device 17 in the yarn traveling direction to the second heating device 19. The third feed roller 18 is configured to be able to feed two strands of yarn Y to the second heating device 19, as shown in FIG. 2 , for example, but is not limited to this. The speed at which the yarn Y is conveyed by the third feed roller 18 is slower than the speed at which the yarn Y is conveyed by the second feed roller 16. Therefore, the yarn Y is relaxed between the second feed roller 16 and the third feed roller 18. The second heating device 19 is configured to heat the yarn Y fed from the third feed roller 18. The second heating device 19 extends vertically, with one second heating device 19 provided per span. The fourth feed roller 20 is configured to feed the yarn Y heated by the second heating device 19 to the winding device 21. 2, the fourth feed roller 20 is configured to be able to feed two strands of yarn Y to the winding device 21, but is not limited to this. The conveying speed of the yarn Y by the fourth feed roller 20 is slower than the conveying speed of the yarn Y by the third feed roller 18. Therefore, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

[0032] In the processing unit 3 configured as described above, the yarn Y drawn between the first feed roller 11 and the second feed roller 16 is twisted by the false twist device 15. The twist formed by the false twist device 15 propagates to the twist stop guide 12 but does not propagate upstream of the twist stop guide 12 in the yarn traveling direction. The yarn Y, which has been drawn and twisted, is heated and heat-set by the first heating device 13 and then cooled by the cooling device 14. The yarn Y is untwisted downstream of the false twist device 15 in the yarn traveling direction, but the heat-set maintains the wavy false-twisted state of the yarn Y. The two false-twisted yarns Y (yarn Ya and yarn Yb) are relaxed between the second feed roller 16 and the third feed roller 18 and are then doubling by the doubling device 17, or are guided downstream in the yarn traveling direction without being doubling. Furthermore, the yarn Y is heat-set by the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20. Finally, the yarn Y (yarn Yc, or yarns Ya, Yb) sent from the fourth feed roller 20 is wound by the winding device 21. As a result, one winding package P1 or two winding packages P2 are formed in each winding device 21.

[0033] (Configuration of winding section) The configuration of the winding unit 4 will be described with reference to FIG. 2 and FIGS. 3(a) and (b). FIG. 3(a) is an explanatory diagram showing a single winding bobbin Bw and its peripheral configuration. FIG. 3(b) is an explanatory diagram showing a winding body 100 having multiple winding bobbins Bw (winding bobbins B2) and a connecting member 60 (described later), and its peripheral configuration. The winding unit 4 has multiple winding devices 21. As described in JP 2013-35640 A, for example, each winding device 21 is configured to be able to wind the yarn Y onto one or two winding bobbins Bw. That is, each winding device 21 can select between a single mode and a multiple mode as its operating mode. The single mode is an operating mode in which one yarn Yc is wound onto one winding bobbin Bw (winding bobbin B1). The multiple mode is an operating mode in which two yarns Ya and Yb are wound onto two winding bobbins Bw (winding bobbins B2). The winding device 21 has a fulcrum guide 41 that serves as a fulcrum when the yarn Y is traversed, a traverse device 42 that traverses the yarn Y, a single cradle 43 that rotatably supports the winding bobbin Bw, and a control unit 44 (see FIG. 1). Note that instead of the control unit 44, for example, a control device (not shown) that controls multiple winding devices 21 may be provided.

[0034] As described above, the fulcrum guide 41 is a guide that serves as a fulcrum when the yarn Y is traversed. For example, three fulcrum guides 41 are provided in each winding device 21, lined up in the longitudinal direction of the machine (see FIG. 2). For example, when guiding a single yarn Y that has been doubling by the doubling device 17, the yarn Y is hooked on the central fulcrum guide 41 of the three fulcrum guides (see the left side of FIG. 2). When guiding two yarns Y that have been fed as they are without being doubling, the yarn Y is hooked on the two fulcrum guides 41 at both ends of the three fulcrum guides 41 (see the right side of FIG. 2).

[0035] The traverse device 42 is configured to be able to traverse the yarn Y using, for example, a traverse guide 45 attached to an endless belt (not shown) driven reciprocally by a motor (not shown). The number of traverse guides 45 attached to the endless belt can be changed depending on the number of yarns Y to be traversed. For example, a traverse device 42 that traverses a single yarn Y that has been combined by the yarn doubling device 17 is provided with one traverse guide 45 (see the left side of the paper in FIG. 2). On the other hand, a traverse device 42 that traverses two yarns Y that have been sent as they are without being combined is provided with two traverse guides 45 (see the right side of the paper in FIG. 2). The movement range of the traverse guide 45 can be changed depending on the number of yarns Y to be traversed. Information related to the number of yarns Y to be traversed and the movement range of the traverse guide 45, etc., is stored in, for example, the control unit 44.

[0036] The cradle 43 is configured to rotatably support a single winding bobbin Bw (winding bobbin B1, see FIG. 3(a)) for winding the yarn Yc, or a winding body 100 (see FIG. 3(b)) for winding the yarns Ya and Yb. Here, an overview of the winding body 100 will be described. The winding body 100 has two winding bobbins Bw (winding bobbins B2) and a connecting member 60. In the axial direction of the winding bobbins Bw attached to the cradle 43 (hereinafter simply referred to as the axial direction), each winding bobbin B2 has a length less than half that of the winding bobbin B1. The outer and inner diameters of the winding bobbins B2 are approximately equal to the outer and inner diameters of the winding bobbins B1.

[0037] The connecting member 60 is made of, for example, resin. The connecting member 60 is configured to connect two winding bobbins B2 side by side in the axial direction. The connecting member 60 has a base portion 61 and a pair of mounting portions 62 (a first mounting portion 63 and a second mounting portion 64) arranged on both axial sides of the base portion 61. The base portion 61 is arranged at the center of the connecting member 60 in the axial direction. The base portion 61 is arranged to be sandwiched between the two winding bobbins B2 (winding bobbins B2a and B2b) in the axial direction. For convenience of explanation, the right side of the paper in FIGS. 3(a) and 3(b) is defined as one side in the axial direction, and the left side of the paper is defined as the other side in the axial direction. For example, the first mounting portion 63 is arranged on one side of the base portion 61 in the axial direction. The second mounting portion 64 is arranged on the other side of the base portion 61 in the axial direction. Each of the first mounting portion 63 and the second mounting portion 64 is configured to be inserted into the winding bobbin B2. As a result, the two winding bobbins B2 are mounted (fixed) to the first mounting portion 63 and the second mounting portion 64, respectively, to form the winding body 100. In the axial direction, the length of the winding body 100 is approximately equal to the length of the single winding bobbin B1. Further details of the connecting member 60 will be described later.

[0038] The cradle 43 is configured so that the winding bobbin B1 can be attached and detached, and so that the winding body 100 can be attached and detached. As shown in FIGS. 3(a) and 3(b), the cradle 43 has a pair of bobbin holders 47 (bobbin holders 47a, 47b) arranged to hold the winding bobbin B1 or the winding body 100. The bobbin holders 47a, 47b are rotatably supported by a pair of arm portions 43a, 43b of the cradle 43, respectively. Each bobbin holder 47 has an insertion portion 48 through which the winding bobbin B1 or the winding bobbin B2 is inserted, and a pressing portion 49 that presses the insertion portion 48 in the axial direction. The pressing portion 49 has Winding bobbin B1 andThe pressing portion 49 has a larger diameter than the winding bobbin B2. A force is applied to the pressing portion 49 by, for example, a spring (not shown) in a direction that presses the winding bobbin B1 (or the winding bobbin B2) in the axial direction. One of the pressing portions 49 in the axial direction has a notch (not shown) formed therein that guides the yarn Y radially inward during the threading operation (described later) (see, for example, JP 2013-35640 A).

[0039] A contact roller 46 is disposed near the cradle 43. The contact roller 46 comes into contact with and applies contact pressure to the surface of a single winding package P1 formed by winding the yarn Y around a single winding bobbin B1 (see FIG. 3(a)), or two winding packages P2 formed by winding the yarn Y around two winding bobbins B2 (see FIG. 3(b)). The contact roller 46 has a substantially cylindrical shape with a substantially uniform outer diameter in the axial direction. The contact roller 46 can apply contact pressure to both the single winding package P1 and the two winding packages P2 (the reason for this will be described later). In other words, the contact roller 46 is a common roller that is used when forming both the single winding package P1 and the two winding packages P2.

[0040] The winding bobbin B1 or the winding body 100 supported by the cradle 43 is rotated by, for example, a motor (not shown). In such a configuration, a contact roller 46 in contact with the surface of the winding package P1 or the winding package P2 applies contact pressure to the winding package P1 (or the winding package P2) while being driven to rotate by friction. Alternatively, instead of driving the winding bobbin B1 or the winding body 100 by a motor, the contact roller 46 may be driven to rotate by a motor (not shown). In such a configuration, the winding package P1 (or the winding package P2) in contact with the contact roller 46 is driven to rotate by friction.

[0041] The control unit 44 controls the operation of the traverse device 42 and the operation of the motor that rotates and drives the winding bobbin B1 (or winding body 100). The control unit 44 is configured to be able to change the setting related to the number of yarn Y to be wound onto the winding device 21. That is, the control unit 44 can switch the operation mode between a single mode in which one yarn Y is wound onto a single winding bobbin B1 (see the left part of the page in FIG. 2) and a multiple mode in which two yarns Y are wound onto each of two winding bobbins B2 (see the right part of the page in FIG. 2).

[0042] In the winding section 4 configured as described above, the yarn Y fed from the fourth feed roller 20 is wound onto the winding bobbin B1 (or winding bobbin B2) by each winding device 21 to form the winding package P1 (or winding package P2). When two strands of yarn Y are combined by the yarn doubling device 17, the operation mode of the corresponding winding device 21 is set to the single mode. When the two strands of yarn Y are guided downstream in the yarn traveling direction without being combined, the operation mode of the corresponding winding device 21 is set to the multiple mode. The following mainly describes the configuration when the multiple mode is executed.

[0043] (Threading device) In this embodiment, a threading device 50 is provided near the winding device 21 (see FIGS. 4(a), (b) and 5(a) to (c)). FIG. 4(a) is a view of the threading device 50 as seen from above. FIG. 4(b) is a view of the threading device 50 as seen from one side in the axial direction. FIGS. 5(a) to (c) are explanatory diagrams showing the operation of the threading device 50 when threading a yarn onto the winding bobbin B2.

[0044] The threading device 50 is configured to complete winding of the yarn Y onto the winding body 100 attached to the cradle 43, and to thread a new winding body 100 attached to the cradle 43. The threading device 50 is configured to be able to thread the yarn Y onto each of the two winding bobbins B2. An example of the threading device 50 will be described below. The threading device 50 has two threading sections 51 (threading sections 51a, 51b) arranged side by side in the axial direction. The threading section 51a is configured to thread the yarn Y (thread Ya) on one axial side onto the winding bobbin B2 (winding bobbin B2a) on one axial side. The threading section 51b is configured to thread the yarn Y (thread Yb) on the other axial side onto the winding bobbin B2 (winding bobbin B2b) on the other axial side. 4(a) and 4(b), each threading unit 51 has a suction mouth 52, a thread pulling arm 53, a thread placement arm 54, a thread pressing arm 55, a thread holding arm 56, and a cutter 57 (see FIG. 4(a)). Each threading unit 51 is configured to be able to perform an operation to finish winding the yarn Y onto the winding bobbin B2 and an operation to thread the yarn onto a new winding bobbin B2.

[0045] The suction mouth 52 is used to temporarily suck and hold the running yarn Y that has been false-twisted by the processing unit 3 after winding of the yarn Y onto a certain winding body 100 is completed and until threading onto the next winding body 100 is completed. The suction mouth 52 is located outside the area where the yarn Y is traversed by the traverse guide 45 (see the yarn Y indicated by the solid line and the two-dot chain line in FIG. 4(a)). Each suction mouth 52 is located outside (on one axial side in this embodiment) the area where the yarn Y to be wound onto the corresponding winding bobbin B2 is traversed. The yarn shifting arm 53 is configured to move the yarn Y, which is being traversed by the traverse guide 45, to one axial side. The yarn shifting arm 53 is rotatable about a rotation shaft 53a that extends in a direction substantially perpendicular to the axial direction. A guide member 58 is provided near the rotation shaft 53a to guide the yarn Y to the vicinity of the entrance of the suction mouth 52. The yarn pulling arm 53 can change its state between a retracted position extending along the axial direction (see, for example, FIG. 5(a)) and a yarn pulling position rotated approximately 90 degrees from the retracted position (see, for example, FIG. 5(b)). The yarn positioning arm 54 is configured to position the yarn Y, which is sucked and held by the suction mouth 52, approximately directly above the winding body 100 (see, for example, FIG. 5(c)). The yarn positioning arms 54 of the yarn hooking unit 51a and the yarn positioning arms 54 of the yarn hooking unit 51b are configured to be integrally rotatable about a rotation shaft 54a extending in the axial direction. The yarn pressing arm 55 is configured to press the yarn Y against the outer periphery of the winding body 100. The yarn pressing arms 55 of the yarn hooking unit 51a and the yarn pressing arms 55 of the yarn hooking unit 51b are configured to be integrally rotatable about a rotation shaft 55a extending in the axial direction. The thread holding arm 56 is configured to hold the thread Y by sandwiching it between itself and the thread pressing arm 55. The thread holding arm 56 is configured to be rotatable integrally with the thread placement arm 54. The cutter 57 is configured to cut the thread Y that has been moved to one side in the axial direction by the thread pulling arm 53. For more details about these components, see, for example, Japanese Patent Application Laid-Open No. 2013-23385.

[0046] The yarn threading operation by the yarn threading device 50 will be briefly described with reference to FIGS. 5(a) to 5(c). For example, the yarn Y is wound onto two winding bobbins B2 of the winding body 100 attached to the cradle 43 to form two winding packages P2 (see FIG. 5(a)). At this time, the yarn shifting arm 53 rotates from the retracted position to the yarn shifting position, and the yarn Y is moved to one side in the axial direction while being guided along the guide member 58. As a result, the yarn Y is removed from the traverse guide 45 and then cut by the cutter 57. This completes the winding of the yarn Y onto the winding body 100 attached to the cradle 43. Almost simultaneously, the yarn Y upstream of the cutter 57 in the yarn traveling direction is sucked and captured by the suction mouth 52 (see FIG. 5(b)). After the yarn Y is sucked and captured by the suction mouth 52, the yarn shifting arm 53 returns to the retracted position. Next, the full winding package P2 is removed from the cradle 43 by, for example, an auto-doffer (not shown), and a new winding body 100 having an empty winding bobbin B2 is attached to the cradle 43.

[0047] Next, while the yarn Y is being sucked and held by the suction mouth 52, the yarn placement arm 54 rotates upward (see FIG. 5(c)). As a result, the yarn Y is positioned almost directly above the winding body 100. At this time, the yarn holding arm 56 also rotates integrally with the yarn placement arm 54 (see FIG. 5(c)). Furthermore, as the yarn pressing arm 55 rotates, the yarn Y between the yarn placement arm 54 and the suction mouth 52 in the yarn running direction is pressed against the rotating winding bobbin B2 and its vicinity (see FIGS. 5(c) and 3(b)). More specifically, the yarn Y on one axial side (yarn Ya) is guided radially inward along a notch (not shown) formed in the pressing portion 49 of the bobbin holder 47 and is gripped between the end face on one axial side of the winding bobbin B2a and the pressing portion 49. This allows the yarn Ya to be wound onto the winding bobbin B2a. As will be described later, the yarn Y on the other side in the axial direction (yarn Yb) is captured by the connecting member 60 and becomes capable of being wound onto the rotating winding bobbin B2b.

[0048] At least some of the components of the threading unit 51b may be configured to be removable from the threading device 50. Winding device 21 When the operation mode is switched from the multiple mode to the single mode, at least some of the components of the threading unit 51b may be removed from the threading device 50, and only the threading unit 51a may be used to thread one yarn Y. Alternatively, the entire threading device 50 may be replaced with a threading device (not shown) dedicated to the single mode. The threading operation described above may be performed by an operator instead of the threading device 50.

[0049] Here, a conventional connecting member (not shown) is configured to pinch and capture the yarn Yb in the gap formed between the connecting member and the winding bobbin B2b. However, in recent years, it has become possible to produce thinner yarns Y than before, which has led to the following problem. Even if the thin yarn Y is pinched in the gap between the conventional connecting member and the winding bobbin B2b, it is difficult to firmly grip the thin yarn Y in the gap and it is prone to falling out of the gap. In such a situation, the running yarn Y may become unstable, fluctuating between tension and slack. If the slack in the yarn Y propagates upstream in the yarn running direction, the yarn Y arranged upstream in the yarn running direction may not run normally. Furthermore, there is a risk that the thin yarn Y will not be captured in the gap between the winding bobbin B2b and the conventional connecting member, resulting in a failed threading attempt. In this embodiment, the connecting member 60 has the following configuration to reliably capture the yarn Y without slackening it. Note that such a problem does not occur when capturing the yarn Y in the gap between the winding bobbin B2a and the bobbin holder 47. The inventors of the present application consider that this may be related to the fact that the yarn Y is caught by the notch of the bobbin holder 47 described above.

[0050] (Detailed configuration of connecting members) Next, the detailed configuration of the connecting member 60 (particularly the detailed configuration of the base portion 61) will be described with reference to FIGS. 6 to 10(b). FIG. 6 is a perspective view of the base portion 61. FIG. 7 is a view of the base portion 61 as seen from an arrow VII in FIG. 6, as viewed from a direction perpendicular to the axial direction. FIG. 8 is a view of the base portion 61 as seen from an arrow VIII in FIG. 6, as viewed from a direction perpendicular to the axial direction. FIG. 9(a) is an enlarged view of a portion of the base portion 61 shown in FIG. 7. FIG. 9(b) is an enlarged view of a portion of the base portion 61 shown in FIG. 8. FIG. 10(a) is a cross-sectional view taken along line X(a)-X(a) in FIG. 8. FIG. 10(b) is a cross-sectional view taken along line X(b)-X(b) in FIG. 8. In FIGS. 6 to 8, the base portion 61 is indicated by a solid line, the mounting portion 62 (the first mounting portion 63 and the second mounting portion 64) is indicated by a dashed line, and the winding bobbins B2a and B2b are indicated by a two-dot chain line.

[0051] 7 and 8, the first mounting portion 63 is disposed on one axial side (the right side of the drawing) of the base portion 61, and the second mounting portion 64 is disposed on the other axial side (the left side of the drawing) of the base portion 61. For ease of explanation, this orientation of the connecting member 60 is referred to as the "normal orientation" of the connecting member 60. Also, for ease of explanation, when the connecting member 60 is disposed in the normal orientation, the counterclockwise direction when the connecting member 60 is viewed from one axial side is defined as one circumferential side (see FIG. 10(a)). Similarly, the clockwise direction is defined as the other circumferential side (see FIG. 10(a)). For reference, FIG. 10(b) is a cross-sectional view of the connecting member 60 viewed from the other axial side, and therefore in FIG. 10(b), the clockwise direction is defined as one circumferential side, and the counterclockwise direction is defined as the other circumferential side.

[0052] The base portion 61 is a generally disk-shaped portion overall. The base portion 61 is smaller in the radial direction than the winding bobbins B2a and B2b. In other words, the base portion 61 is located inside the winding bobbins B2a and B2b in the radial direction.

[0053] As shown in Figures 6 to 10(a), the base portion 61 has a pair of stopper portions 66, a guide slit 71 (see Figures 7 to 10(b)), and a capturing claw 72. When the connecting member 60 is positioned in the correct direction, the base portion 61 is configured so that the guide slit 71 guides the running yarn Y (yarn Yb) radially inward, and the capturing claw 72 can capture the yarn Yb.

[0054] The pair of stopper portions 66 (stopper portions 67, 68) are configured to restrict movement of the winding bobbin B2 in the axial direction. The stopper portion 67 is formed at one end of the base portion 61 in the axial direction. The stopper portion 67 is located radially outward of the other end of the first mounting portion 63 in the axial direction. The stopper portion 67 has an inclined surface 67a. The inclined surface 67a is, for example, It is roughly a truncated cone shape, The outer diameter becomes smaller toward the other axial side (i.e., the further away from the one axial end of the base portion 61). The stopper portion 68 (one of the pair of stopper portions of the present invention) is formed at the other axial end of the base portion 61. The stopper portion 68 is located radially outward from the one axial end of the second mounting portion 64. The stopper portion 68 has an inclined surface 68a. The inclined surface 68a is It is roughly a truncated cone shape, For example, the outer diameter becomes smaller toward one side in the axial direction (i.e., as it moves away from the other axial end of the base portion 61 and approaches a guide surface 73 described later). Note that the inclined surfaces 67a and 68a are, for example, linear when viewed from a direction perpendicular to the axial direction (see FIGS. 7 and 8), but are not limited to this. The inclined surfaces 67a and / or 68a may have a curved surface when viewed from a direction perpendicular to the axial direction, for example.

[0055] The guide slit 71 (see Figures 7 to 10(b)) is a slit for guiding the yarn Yb radially inward. The guide slit 71 is formed in the inner part (generally the center part) of the base part 61 in the axial direction. More specifically, the guide slit 71 is disposed between the stopper part 67 and the stopper part 68 in the axial direction (see Figures 8 to 9(b)). The guide slit 71 has a guide surface 73 and an opposing surface 74. The guide surface 73 faces at least one side in the axial direction. The guide surface 73 is formed, for example, in a generally L-shape. 。 More specifically, as shown in FIG. 10(a), for example, a radially outer portion of the guide surface 73 extends in the circumferential direction. One circumferential side portion of the radially outer portion of the guide surface 73 has a gap between it and the bottom surface 75 in the radial direction. The other circumferential side portion of the guide surface 73 extends from the radially outer side to the radially inner side and is connected to the other circumferential side portion of the bottom surface 75. The guide surface 73 is formed in a portion in the circumferential direction. The guide surface 73 is connected to the inclined surface 68a and is disposed radially inside the inclined surface 68a (see FIG. 10(a)). In other words, the guide surface 73 is disposed radially inside the outermost ends of the pair of stopper portions 66 in the radial direction. The guide surface 73 is formed to extend radially inside the capturing claws 72. The opposing surface 74 faces the other axial side and is disposed to face the guide surface 73 in the axial direction (see FIGS. 8 and 9(b)). The opposing surface 74 is formed in a generally crescent shape (see FIG. 10(b)). The opposing surface 74 is connected to the inclined surface 67a and is disposed radially inside the inclined surface 67a (see FIG. 10(b)). In the axial direction, a bottom surface 75 is formed between the guide surface 73 and the opposing surface 74, connecting the radially inner end of the guide surface 73 and the radially inner end of the opposing surface 74. The bottom surface 75 faces at least radially outward. When viewed in the axial direction, the bottom surface 75 is generally linear. The bottom surface 75 may be substantially linear. Alternatively, the bottom surface 75 may have both ends slightly curved, as shown in FIGS. 10(a) and 10(b).

[0056] The capturing claw 72 is configured to capture the yarn Yb guided radially inward by the guide surface 73. As shown in FIGS. 7 to 9 , the capturing claw 72 is disposed, for example, on the other side of the guide surface 73 in the axial direction. The capturing claw 72 is disposed, for example, at a position at which it at least partially overlaps with the stopper portion 68 in the axial direction. The capturing claw 72 is disposed, for example, at an end position on one side of the guide surface 73 in the circumferential direction. The capturing claw 72 has, for example, a receiving surface 76 and a protrusion 77. The receiving surface 76 is configured to receive the running yarn Yb. The receiving surface 76 faces, for example, at least one side in the circumferential direction. The protrusion 77 is configured to prevent the yarn Yb received by the receiving surface 76 from falling off the receiving surface 76. The protrusion 77 is, for example, a protrusion that protrudes toward one side in the circumferential direction beyond the receiving surface 76. The protrusion 77 is disposed on one side of the receiving surface 76 in the axial direction. The protruding portion 77 has, for example, a substantially planar side surface 77a (see FIGS. 9(a) and 9(b)) facing the other side in the axial direction and one side in the circumferential direction.

[0057] In addition, the base portion 61 is configured such that the connecting member 60 faces in the opposite direction to the normal direction (i.e., the axial direction). Parallel 8 and 10(b), the base portion 61 has a preliminary guide slit 81 and a preliminary catch claw 82. The preliminary guide slit 81 and the preliminary catch claw 82 are arranged at positions different from the guide slit 71 and the catch claw 72 in the circumferential direction. More specifically, the preliminary guide slit 81 and the preliminary catch claw 82 are arranged at positions approximately 180 degrees apart from the positions where the guide slit 71 and the catch claw 72 are formed in the circumferential direction (see FIGS. 10(a) and 10(b)). The preliminary guide slit 81 and the preliminary catch claw 82 are formed to be point-symmetrical with the guide slit 71 and the catch claw 72, with the axial and radial centers of the base portion 61 as the symmetry points, when viewed from a predetermined direction perpendicular to the axial direction (see FIG. 8).

[0058] The preliminary guide slit 81 has substantially the same shape as the guide slit 71. The preliminary guide slit 81 has a preliminary guide surface 83 that has substantially the same shape as the guide surface 73, and a preliminary opposing surface 84 that has substantially the same shape as the opposing surface 74. The preliminary guide surface 83 faces at least the other side in the axial direction. The preliminary guide surface 83 is connected to the inclined surface 67a and is disposed radially inward of the inclined surface 67a (see FIG. 10(b)). In other words, the preliminary guide surface 83 is also disposed radially inward of the outermost ends of the pair of stopper portions 66 in the radial direction. The preliminary opposing surface 84 faces at least one side in the axial direction and is disposed so as to face the preliminary guide surface 83 in the axial direction. The preliminary opposing surface 84 is connected to the inclined surface 68a and is disposed radially inward of the inclined surface 68a (see FIG. 10(a)). In the axial direction, a bottom surface 85 (see FIG. 8 ) is formed between the preliminary guiding surface 83 and the preliminary opposing surface 84, connecting the radially inner end of the preliminary guiding surface 83 and the radially inner end of the preliminary opposing surface 84. The shape of the bottom surface 85 is substantially the same as the shape of the bottom surface 75.

[0059] The preliminary capturing claw 82 has substantially the same shape as the capturing claw 72. As shown in FIG. 8, the preliminary capturing claw 82 is disposed, for example, on one side of the preliminary guide surface 83 in the axial direction. The preliminary capturing claw 82 is disposed, for example, on the opposite side of the stopper portion 67 in the axial direction. At least partially The preliminary capturing claw 82 is arranged at an overlapping position. The preliminary capturing claw 82 is arranged, for example, at the end position on the other side of the preliminary guiding surface 83 in the circumferential direction. The preliminary capturing claw 82 has, for example, a preliminary receiving surface 86 having substantially the same shape as the receiving surface 76, and a preliminary protruding portion 87 having substantially the same shape as the protruding portion 77. The preliminary receiving surface 86 faces, for example, at least toward the other side in the circumferential direction. The preliminary protruding portion 87 has, for example, spare Receiving surface 86 The auxiliary protrusion 87 is a protrusion that protrudes toward the other side in the circumferential direction. spare Receiving surface 86 is disposed on the other side in the axial direction.

[0060] As shown in Figures 10(a) and (b), an outer peripheral surface 91, which is disposed radially outward from the bottom surface 75, is connected to one circumferential end of the bottom surface 75. An outer peripheral surface 92, which is disposed radially outward from the bottom surface 75, is connected to the other circumferential end of the bottom surface 75. The outer peripheral surfaces 91, 92 are generally arc-shaped when viewed in the axial direction. The outer peripheral surface 91 is connected to the other circumferential end of the bottom surface 85. The outer peripheral surface 92 is connected to one circumferential end of the bottom surface 85. The bottom surfaces 75, 85 and the outer peripheral surfaces 91, 92 are formed in approximately the center of the base portion 61 in the axial direction. An inclined surface 67a is connected to one axial end of the outer peripheral surfaces 91, 92 ( Figure 9(a) and (b) The other axial end of the outer peripheral surfaces 91 and 92 is connected to the inclined surface 68a (see Figure 9(a) and (b) reference).

[0061] (Method of threading connecting members) Next, among the threading methods for threading multiple yarns Y on the winding body 100 described above, a method for threading one of the multiple yarns Y on the connecting member 60 will be described with reference to Figures 11(a) to 12(c). More specifically, the following describes how the yarn Yb is captured by the connecting member 60 when the yarn Y (yarn Yb) is positioned so as to be pressed against the surface of the winding body 100 by the threading device 50 (or an operator) (see Figures 3(b) and 5(c)). Here, the description will proceed assuming that the connecting member 60 is positioned in the correct orientation.

[0062] When threading is performed, the yarn Yb is positioned near the surface of the base portion 61 of the connecting member 60 at a slight angle (left-right direction) with respect to the direction in which the base portion 61 extends (up-down direction on the paper surface) when viewed from a direction perpendicular to the axial direction (see FIGS. 3(b), 7, and 8). As described above, the yarn Yb travels toward the suction mouth 52 (i.e., toward the bottom of the paper surface, as shown by the dashed arrows in FIGS. 11(a) to 12(c)). The winding body 100 including the connecting member 60 rotates to one side in the circumferential direction (see the solid arrows in FIGS. 11(a) to 12(c)).

[0063] When the running yarn Yb is positioned so as to be pressed against the surface of the rotating winding body 100 (see FIG. 5(c)), the yarn Yb is guided axially and radially inward of the base portion 61 of the connecting member 60 along the inclined surfaces 67a, 68a of the base portion 61 (see FIG. 11(a)). As the winding body 100 further rotates, the yarn Yb guided radially inward by the inclined surfaces 67a, 68a is further guided radially inward along the guide surfaces 73 (see FIG. 11(b)). As the winding body 100 further rotates, the capturing claws 72 hook onto the yarn Yb and capture it (see FIGS. 11(c) and 12(a)). The yarn Yb captured by the capturing claws 72 is received by the receiving surface 76 (see FIG. 12(b)). The protrusions 77 prevent the yarn Yb received by the receiving surface 76 from falling off the receiving surface 76 (more specifically, the yarn Yb is prevented from falling off to one axial side and radially outward). In this way, the yarn Yb is captured and held by the capturing claws 72. Note that immediately after being captured by the capturing claws 72, the yarn Yb is simply received by the receiving surface 76 and can slide relative to the receiving surface 76. This prevents the yarn Yb from falling into an unstable state where it becomes taut or slack due to the capturing claws 72.

[0064] When the winding body 100 is rotating, the yarn Yb is also guided radially inward by the preliminary guide slit 81. However, when the connecting member 60 is positioned in the correct orientation, the preliminary catching claw 82 rotates in the direction opposite to the direction in which it catches the yarn Yb. Therefore, the preliminary catching claw 82 does not unintentionally catch the yarn Yb.

[0065] Furthermore, as the winding body 100 continues to rotate (see FIG. 12(c)), the yarn Yb is wound around the connecting member 60 in an overlapping manner for several turns, and the yarn Yb is firmly held by the connecting member 60. As a result, the portion of the yarn Yb downstream of the winding body 100 in the yarn running direction (toward the suction mouth 52) is naturally cut by tension. In this way, the yarn Yb can be wound onto the winding bobbin B2b.

[0066] When the connecting member 60 is disposed in a direction opposite to the normal direction, the preliminary capturing claw 82 is disposed so as to protrude to one side in the circumferential direction. In this case, the preliminary guide slit 81 and the preliminary capturing claw 82 can function in place of the guide slit 71 and the capturing claw 72. That is, when the connecting member 60 is disposed in a direction opposite to the normal direction, the yarn Yb guided radially inward by the preliminary guide slit 81 (the preliminary guide surface 83 and the preliminary opposing surface 84) can be captured and held by the preliminary capturing claw 82. In this case, the yarn Yb will not be unintentionally captured by the capturing claw 72.

[0067] As described above, by bringing the running yarn Yb closer to the rotating winding body 100 and then hooking it onto the catching claws 72 of the connecting member 60, the yarn Yb can be reliably caught by being wound into the catching claws 72. Furthermore, the guide surfaces 73 can smoothly guide the yarn Yb radially inward. This makes it possible to prevent unintended resistance from being applied to the yarn Yb while allowing the yarn Yb to reach the catching claws 72. Therefore, the yarn Yb can be reliably caught without slackening.

[0068] Furthermore, when the winding body 100 rotates to one side in the circumferential direction, the yarn Yb can be caught by being received by the receiving surface 76. Here, the receiving surface 76 simply receives the yarn Yb, and does not, for example, pinch and hold the yarn Yb. In other words, at least the yarn Yb immediately after being received by the receiving surface 76 Yb is slidable relative to the receiving surface 76. This prevents the yarn Yb from becoming unstable, such as being taut or loose, due to the capturing claws 72. Furthermore, the protrusions 77 prevent the yarn Yb received by the receiving surface 76 from moving radially outward and falling off the base portion 61. This allows the yarn Yb to be stably captured and held while it is running.

[0069] Furthermore, the guide slits 71 can reliably and stably guide the yarn Yb radially inward.

[0070] In addition, the axial direction and Parallel In-plane connecting member 60 is rotated 180 degrees, the auxiliary guide surface 83 can function in place of the guide surface 73, and the auxiliary catching claw 82 can function in place of the catching claw 72. This allows the yarn Yb to be caught correctly even if the winding body 100 is attached to the winding device 21 in an orientation opposite to the normal orientation. In other words, there is no need to consider the orientation of the connecting member 60 when attaching the connecting member 60 to the winding device 21. This reduces the effort required when the orientation of the connecting member 60 needs to be considered.

[0071] Furthermore, the preliminary capturing claw 82 is disposed at a different position in the circumferential direction from the capturing claw 72. This allows the capturing claw 72 and the preliminary capturing claw 82 to be formed larger while suppressing an increase in size in the axial direction of the base portion 61, compared to when the capturing claw 72 and the preliminary capturing claw 82 are disposed at positions where they all or partly overlap in the circumferential direction. Therefore, it is possible to both suppress an increase in size of the connecting member 60 and suppress failure to capture and / or hold the yarn Yb.

[0072] Furthermore, the guide surface 73 and the capturing claw 72 are disposed radially inward of the radially outer ends of the pair of stopper portions 66. Therefore, by attaching two winding bobbins B2 having an outer diameter equal to or larger than the outer diameter of the pair of stopper portions 66 to the connecting member 60, the winding body 100 can be handled in the same way as a single winding bobbin B1. In particular, the same contact roller 46 can be used when the operation mode of the winding device 21 is in the multiple mode and the single mode. This eliminates the need to replace the contact roller 46 when switching the operation mode.

[0073] Also, the running yarn Y b The inclined surface 68a can smoothly guide the material to the guide surface 73.

[0074] In addition, in the threading method of this embodiment, the thread Y b By capturing the yarn Y by the capturing claw 72, b Therefore, the thread threading success rate can be improved.

[0075] Next, a modified example of the embodiment will be described, with the same reference numerals being used to designate components having the same configuration as the embodiment, and the description thereof will be omitted as appropriate.

[0076] (1) In the above embodiment, the base portion 61 of the connecting member 60 constituting the winding body 100 is located radially inward of the winding bobbins B2a and B2b. However, this is not limited to this. The base portion 61 may be formed so that its radial size is equal to that of the winding bobbins B2a and B2b. Even in this case, the contact roller 46 can be used in both the multi-mode and the single-mode.

[0077] Alternatively, the radial size of the base portion 61 may be larger than the radial size of the winding bobbins B2a, B2b. For example, the guide surface 73 and the capturing claw 72 may protrude radially outward beyond the stopper portions 67, 68. In this case, however, in order to properly apply contact pressure to the winding package P2 in the multiple mode, it is necessary to use a contact roller (not shown) whose center in the axial direction is recessed.

[0078] (2) In the above-described embodiments, the preliminary guide surface 83 and the preliminary capturing claw 82 are provided at positions different from the guide surface 73 and the capturing claw 72 in the circumferential direction. However, this is not limited to this. At least a portion of the preliminary guide surface 83 and the preliminary capturing claw 82 may be provided at a position overlapping the guide surface 73 and the capturing claw 72 in the circumferential direction.

[0079] (3) In the above-described embodiments, the connecting member 60 is provided with one each of the capturing claw 72 and the preliminary capturing claw 82. However, this is not limited to this. For example, a plurality of at least one of the capturing claw 72 and the preliminary capturing claw 82 may be provided. As a specific example, two capturing claws 72 may be arranged side by side in the circumferential direction. Alternatively, the second capturing claw 72 may be provided, for example, at a position where the preliminary opposing surface 84 is formed. Furthermore, the number of capturing claws 72 and the number of preliminary capturing claws 82 provided on the connecting member 60 may be the same or different from each other.

[0080] (4) In the above-described embodiments, the connecting member 60 is provided with the auxiliary guide surface 83 and the auxiliary capturing claw 82. However, this is not limited to this. The connecting member 60 does not have to have the auxiliary guide surface 83 and the auxiliary capturing claw 82. In this case, however, care must be taken with the orientation of the winding body 100 when attaching the winding body 100 to the cradle 43.

[0081] (5) In the above-described embodiments, the opposing surface 74 is formed on one axial side of the guide surface 73, and the guide slit 71 is formed by the guide surface 73 and the opposing surface 74. However, this is not limited to this. The opposing surface 74 does not necessarily have to be provided.

[0082] (6) The shape of the receiving surface 76 is not limited to the above. For example, the receiving surface 76 may be curved in a concave shape.

[0083] (7) The shape of the protruding portion 77 is not limited to the above. The protruding portion 77 may have, for example, a cylindrical shape that protrudes at least in the circumferential direction.

[0084] (8) In the above-described embodiments, the receiving surface 76 and the protruding portion 77 are formed separately, but this is not limiting. For example, the receiving surface 76 does not necessarily have to be formed. In this case, for example, the side surface 77a of the protruding portion 77 may receive the thread Yb.

[0085] (9) The structure of the catching claw 72 is not limited to the one described above. The catching claw 72 may be configured to catch the yarn Yb guided radially inward by the guide surface 73 using a means other than the means for pinching the yarn Yb in the gap between the winding bobbin B2 and the base 61.

[0086] (10) In the above-described embodiments, the bottom surfaces 75, 85 and the outer peripheral surfaces 91, 92 are formed at the axial center of the base portion 61. However, this is not limited to this. For example, a bottom surface (not shown) that is formed over the entire circumferential area and has a substantially circular shape when viewed from the axial direction may be formed at the axial center of the base portion 61. For example, the bottom surface may be formed radially inward of the above-described bottom surfaces 75, 85.

[0087] (11) The winding device 21 may be configured to be capable of only performing a plurality of modes as the operation mode for winding the yarn Y.

[0088] (12) The winding device 21 may be configured to be able to wind the yarn Y onto three or more winding bobbins (not shown). In other words, the winding body 100 may have two or more connecting members 60 and three or more winding bobbins (not shown).

[0089] (13) The connecting member 60 of the present invention can be applied not only to the winding device 21 of the false twisting machine 1, but also to various winding devices (not shown) configured to be capable of winding two or more yarns (not shown). [Explanation of symbols]

[0090] 1 False twisting machine 21 Winding device 60 Connecting member 61 Base 62 Mounting part 66 Stopper part 68a Slope 71 Guide slit 72 Capture Claw 73 Guideway 74 Opposite Surface 76 Receiving surface 77 Protrusion 82 Spare catch claw 83 Spare guide surface 100 roll B1 Winding bobbin B2 Winding bobbin P1 Winding package P2 Roll Package Y thread Ya thread Yb thread

Claims

1. A connecting member configured to connect two winding bobbins for winding a running yarn in a predetermined axial direction, a base portion disposed so as to be sandwiched between the two winding bobbins arranged in the axial direction; a pair of mounting portions arranged on both sides of the base portion in the axial direction and configured to allow the two winding bobbins to be mounted thereon; The base portion is a pair of stopper portions disposed between the pair of mounting portions in the axial direction and configured to restrict movement of the two winding bobbins in the axial direction; a guide surface disposed between the pair of stopper portions in the axial direction and configured to guide the running yarn radially inwardly of the base portion; a catch claw that catches the yarn guided inward in the radial direction by the guide surface, The capturing claw is a receiving surface formed to face at least one side in a circumferential direction of the base portion; A connecting member characterized by having a protrusion that protrudes further than the receiving surface toward at least one side in the circumferential direction, preventing the running yarn that is received by the receiving surface from falling off.

2. A connecting member configured to connect two winding bobbins for winding a running yarn in a predetermined axial direction, a base portion disposed so as to be sandwiched between the two winding bobbins arranged in the axial direction; a pair of mounting portions arranged on both sides of the base portion in the axial direction and configured to allow the two winding bobbins to be mounted thereon; The base portion is a pair of stopper portions disposed between the pair of mounting portions in the axial direction and configured to restrict movement of the two winding bobbins in the axial direction; a guide surface disposed between the pair of stopper portions in the axial direction and configured to guide the running yarn radially inwardly of the base portion; a capturing claw that captures the yarn guided inward in the radial direction by the guide surface, The guide surface faces at least one side in the axial direction, The capturing claw is disposed on the other side of the guide surface in the axial direction and protrudes toward at least one side in the circumferential direction of the base portion, The base portion is a preliminary guide surface facing at least the other side in the axial direction and capable of guiding the running yarn inward in the radial direction; A connecting member comprising: a preliminary capture claw disposed on one side of the preliminary guide surface in the axial direction and protruding at least toward the other side in the circumferential direction.

3. The guide surface faces at least one side in the axial direction, The capturing claw is disposed on the other side of the guide surface in the axial direction and protrudes toward at least one side in the circumferential direction of the base portion, The base portion is a preliminary guide surface facing at least the other side in the axial direction and capable of guiding the running yarn inward in the radial direction; 2. The connecting member according to claim 1, further comprising a preliminary capture claw disposed on the one side of the preliminary guide surface in the axial direction and protruding at least toward the other side in the circumferential direction.

4. 4. The connecting member according to claim 2, wherein the preliminary capturing claw is disposed at a position different from that of the capturing claw in the circumferential direction.

5. The base portion is A connecting member according to any one of claims 1 to 4, characterized in that it has a guide slit formed by the guide surface and an opposing surface arranged to face the guide surface in the axial direction.

6. A connecting member as described in any one of claims 1 to 5, characterized in that the guide surface and the capture claw are arranged radially inwardly of the radially outermost ends of the pair of stopper portions.

7. One of the pair of stopper portions is The connecting member according to claim 6, further comprising an inclined surface connected to the guide surface and formed so that an outer diameter of the inclined surface decreases toward the guide surface in the axial direction.

8. A yarn threading method for threading a plurality of running yarns onto a winding body having the connecting member according to any one of claims 1 to 7 and two winding bobbins attached to the connecting member, comprising: A yarn threading method, comprising: rotating the winding body; guiding one of the plurality of yarns inward in the radial direction by the guide surface so that the yarn is captured by the capturing claw.

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